JP4401799B2 - Work holding vise - Google Patents

Description

  The present invention relates to a workpiece holding vise for adjusting a posture of a workpiece while holding the workpiece when the workpiece is machined using, for example, a wire-cut electric discharge machine, and more specifically, the posture of the held workpiece is more accurately measured. The present invention relates to a work holding vise improved so that it can be adjusted.

  Conventionally, when a workpiece is machined using a wire cut electric discharge machine, the posture is adjusted while holding the workpiece using a workpiece holding vise fixed on a workpiece stand (for example, Patent Document 1 below) 2).

The structure and function of such a work holding vise will be briefly described with reference to FIGS. 11 to 15. The work holding vise 1 includes a fixing plate 2 fixed on a work stand (not shown) with bolts, and the fixing plate 2. On the other hand, it has a substrate 3 that extends parallel to each other with a slight gap and is supported to be tiltable with respect to the fixed plate 2.
The substrate 3 includes a fixed jaw 4 for gripping a workpiece disposed on one end thereof, a movable jaw 5 that is slidably fitted to the slide portion 3a of the substrate 3 while facing the fixed jaw 4. It has a female screw member 6 that can be positioned and fixed to the slide portion 3a, and a screw rod 7 that is screwed into the female screw member 6.
Thus, after the female screw member 6 is positioned and fixed in accordance with the size of the workpiece to be held, the workpiece is disposed between the fixed jaw 4 and the movable jaw 5 and the screw rod 7 is tightened to firmly fix the workpiece. Can be held.
A bolt is inserted into the large-diameter insertion hole 3b penetrating from the upper surface of the substrate 3 and the small-diameter insertion hole 2a penetrating the fixing plate 2, and the bolt is screwed to the work stand. The fixing plate 2 can be fixed on the work stand.

On the other hand, as shown in FIGS. 11 and 12, a tilt support mechanism 10 for tiltably supporting the substrate 3 with respect to the fixed plate 2 is disposed in the vicinity of the fixed jaw 4.
As shown in FIGS. 13 and 14, the tilting support mechanism 10 is inserted into the nut member 11 press-fitted from the lower surface of the fixed plate 2 and the through hole 3 c penetrating the substrate 3 from above and the nut A plurality of bolt members 12 screwed to the member 11 and a plurality of sheets interposed between a bottom surface of a counterbored hole 3d provided in the upper surface of the substrate 3 coaxially with the insertion hole 3c and a head portion 12a of the bolt member 12. And a spring washer 13.
Further, the convex spherical upper surface 11a of the nut member 11 and the concave spherical sliding surface 3e provided coaxially with the insertion hole 3c on the lower surface of the substrate 3 are in slidable contact.
Accordingly, the substrate 3 can be tilted with respect to the fixed plate 2 without being lifted by the downward biasing force of the spring washer 13.

On the other hand, the X axis tilt angle adjusting mechanism 20 for adjusting the tilt angle of the substrate 3 around the X axis with respect to the fixed plate 2 is tilted with respect to the fixed jaw 4 as shown in FIGS. Further, it is disposed at a position spaced further in the Y-axis direction.
As shown in FIG. 13, the X-axis tilt angle adjusting mechanism 20 is a bolt that is inserted from above into an insertion hole 3 f that penetrates the substrate 3 and is screwed into a female screw 2 b that penetrates the fixing plate 2. A member 21 and a pair of coil springs 22 and 23 disposed between the fixing plate 2 and the substrate 3 symmetrically with respect to the bolt member 21 in the X-axis direction are provided.
Further, the lower surface of the head portion 21a of the bolt member 21 is in contact with the bottom surface of a counterbore hole 3g that is recessed in the upper surface of the substrate 3 coaxially with the insertion hole 3f.
Accordingly, when the bolt member 21 is loosened, the substrate 3 is displaced upward with respect to the fixed plate 2 by the upward biasing force of the coil springs 22 and 23, and the substrate 3 is tilted clockwise around the X axis.
On the other hand, when the bolt member 21 is tightened, the substrate 3 is pushed downward against the upward biasing force of the coil springs 22 and 23, and the substrate 3 tilts counterclockwise around the X axis.
That is, by adjusting the tightening amount of the bolt member 21 of the tilt angle adjusting mechanism 20 around the X axis, the tilt angle around the X axis of the substrate 3 relative to the fixed plate 2 can be finely adjusted.

Similarly, the Y-axis tilt angle adjusting mechanism 30 for adjusting the tilt angle about the Y-axis of the substrate 3 relative to the fixed plate 2 is more in the X-axis direction than the tilt support mechanism 10 as shown in FIGS. It is arrange | positioned in the position spaced apart.
As shown in FIG. 14, the Y-axis tilt angle adjusting mechanism 30 is a bolt that is inserted from above into an insertion hole 3 h that penetrates the substrate 3 and is screwed into a female screw 2 b that penetrates the fixing plate 2. A member 31 and a pair of coil springs 32 and 33 disposed between the fixing plate 2 and the substrate 3 symmetrically with respect to the bolt member 31 in the X-axis direction are provided.
Further, the lower surface of the head portion 31a of the bolt member 31 is in contact with the bottom surface of a counterbore hole 3i that is recessed in the upper surface of the substrate 3 coaxially with the insertion hole 3h.
Accordingly, when the bolt member 31 is loosened, the substrate 3 is displaced upward with respect to the fixed plate 2 by the upward biasing force of the coil springs 32 and 33, and the substrate 3 tilts counterclockwise around the Y axis.
On the other hand, when the bolt member 31 is tightened, the substrate 3 is pushed downward against the upward biasing force of the coil springs 32 and 33, and the substrate 3 tilts clockwise around the Y axis.
That is, by adjusting the tightening amount of the bolt member 31 of the Y axis tilt angle adjusting mechanism 30, the tilt angle of the substrate 3 around the Y axis with respect to the fixed plate 2 can be finely adjusted.

Further, the Z-axis tilt angle adjusting mechanism 40 for adjusting the tilt angle of the substrate 3 around the Z-axis with respect to the fixed plate 2 is separated from the female screw member 6 in the Y-axis direction, as shown in FIGS. 11 and 12. Arranged in position.
As shown in FIG. 15, the Z axis tilt angle adjusting mechanism 40 is inserted into a circular hole 3 j that is recessed in the lower surface of the substrate 3, and is a hollow cylindrical holder 41 that is rotatable around the Z axis. A cylindrical female screw member 42 that fits in the holder 41 and is rotatable about the Y axis, and extends in the Y axis direction while being screwed into the female screw member 42, and the spherical head 43 a is fixed to the fixing plate 2. And a plurality of spring washers 44 accommodated in the counterbore 2d of the substrate 2 coaxially with the bolt member 43. .
Thus, when the bolt member 43 is tightened, the substrate 3 is displaced forward in the Y-axis direction against the biasing force of the spring washer 44, and the substrate 3 is tilted clockwise around the Z-axis.
On the other hand, when the bolt member 43 is loosened, the substrate 3 is pushed backward in the Y-axis direction by the spring washer 44, and the substrate 3 tilts counterclockwise around the Z-axis.
That is, by adjusting the tightening amount of the bolt member 43 of the Z axis tilt angle adjusting mechanism 40, the tilt angle of the substrate 3 around the Z axis with respect to the fixed plate 2 can be finely adjusted.

Japanese Patent Laid-Open No. 58-40228 No. 7-13929

Incidentally, the X-axis tilt angle adjusting mechanism 20 in the conventional workpiece holding vise 1 described above has a structure in which the lower surface of the head 21a of the bolt member 21 is in direct contact with the bottom surface of the counterbored hole 3g of the substrate 3.
Thus, when the substrate 3 tilts with respect to the fixed plate 2 as shown in FIG. 13B, only the corner portion 21b on the lower surface of the head portion 21a of the bolt member 21 is enlarged as shown in FIG. It contacts the bottom surface of the counterbore 3g.
Accordingly, when the bolt member 21 is tightened in order to adjust the tilt angle of the substrate 3 around the X axis with respect to the fixing plate 2, the fixing is performed by the frictional force acting between the head 21a of the bolt member 21 and the bottom surface of the counterbore 3g. Since the tilt of the substrate 3 around the Z axis with respect to the plate 2 occurs, it may be necessary to readjust the tilt angle around the Z axis using the Z axis tilt angle adjusting mechanism 40.

Similarly, the Y-axis tilt angle adjusting mechanism 30 in the conventional workpiece holding vise 1 has a structure in which the lower surface of the head portion 31a of the bolt member 31 is in direct contact with the bottom surface of the counterbored hole 3i of the substrate 3.
Thereby, as shown in FIG. 14B, when the substrate 3 tilts with respect to the fixed plate 2, only the corner portion 31b of the lower surface of the head portion 31a of the bolt member 31 contacts the bottom surface of the counterbore 3i.
Therefore, when the bolt member 31 is tightened in order to adjust the tilt angle of the substrate 3 around the Y axis with respect to the fixed plate 2, it is fixed by the frictional force acting between the head portion 31 a of the bolt member 31 and the bottom surface of the counterbore 3 i. Since the tilt of the substrate 3 around the Z axis with respect to the plate 2 occurs, it may be necessary to readjust the tilt angle around the Z axis using the Z axis tilt angle adjusting mechanism 40.

  Accordingly, an object of the present invention is to eliminate the above-described problems of the prior art, and to tilt the substrate about the X axis and the Y axis relative to the fixed plate without causing the substrate to tilt about the Z axis. It is to provide a work holding vise that can be precisely fine-tuned.

The member according to claim 1, which solves the above problem,
A vice for holding and fixing a workpiece to be wire-cut,
A fixed plate fixed to the work stand;
A substrate arranged to extend in parallel with a gap with respect to the fixed plate;
A support mechanism for supporting the substrate to be tiltable about three axes with respect to the fixed plate;
An inclination angle adjusting mechanism for adjusting an inclination angle of the substrate with respect to the fixed plate.
And, the tilt angle adjusting mechanism is
Biasing means for biasing the substrate in a direction away from the fixed plate;
A screw portion that is screwed to the fixing plate; and when the screw portion is tightened, the engagement surface of the substrate is pushed against the urging force of the urging means to bring the substrate to the fixing plate side. A screw member having an engaging portion to be displaced, and an opposing surface extending while facing the engaging surface of the engaging portion;
Spherical surface forming means for forming a spherical surface whose center is on the axis of the threaded portion on either one of the facing surface and the engaging surface;
A plurality of rolling elements interposed between either one of the opposing surface and the engagement surface and the spherical surface;
Rolling element holding means for holding the plurality of rolling elements such that the plurality of rolling elements are positioned on a circle extending around an axis of the screw portion.

That is, since the work holding vise according to the first aspect includes a plurality of rolling elements interposed between the opposing surface of the screw member and the engagement surface of the substrate, the tilt angle of the substrate with respect to the fixed plate is adjusted. Therefore, when the screw member is rotated, the friction generated between the screw member and the substrate can be greatly reduced.
Further, by combining a spherical surface formed on one side of the opposing surface of the screw member and the engaging surface of the substrate and either one of the other surfaces, between the opposing surface of the screw member and the engaging surface of the substrate Since the plurality of rolling elements can be displaced to a predetermined position determined by the relative angle, all of the plurality of rolling elements are always in contact with the spherical surface and the opposing surface or the engagement surface, and the screw member in the conventional work holding vise In this way, only one point of the opposing surface does not contact the engagement surface of the substrate, and the force that the screw member pushes the substrate and displaces it toward the fixed plate is distributed and transmitted to a plurality of locations. The
As a result, even if the screw member is tightened to adjust the tilt angle of the substrate with respect to the fixed plate around an axis (X axis, Y axis) extending in parallel with the upper surface of the fixed plate, the friction generated between the screw member and the substrate. Since the force can prevent the substrate from rotating about an axis (Z axis) extending perpendicularly to the upper surface of the fixed plate, the tilt angle of the substrate with respect to the fixed plate can be finely adjusted very accurately. .

The means described in claim 2 is the work holding vise according to claim 1,
The spherical surface is formed on the opposing surface of the screw member;
When the rolling element holding means is positioned coaxially with respect to the axis of the threaded portion, the rolling element holding means has a rolling groove extending in the circumferential direction coaxially with the axis, and on the engagement surface with respect to the axis of the threaded portion. A rolling groove forming member that is radially displaceable and extends annularly around the axis;
The rolling element rolls on the spherical surface and the rolling groove.

  That is, in the work holding vise according to claim 2, when the substrate is inclined with respect to the fixed plate, it is guided by the rolling element formed on the opposing surface of the screw member and extends in an annular shape. Since the forming member is displaced on the engagement surface of the substrate, all the rolling elements always come into contact with the spherical surface and the rolling groove.

The means described in claim 3 is the work holding vise according to claim 1,
The spherical surface is formed on the opposing surface of the screw member;
When the rolling element holding means is positioned coaxially with respect to the axis of the screw portion, the plurality of rolling elements are equally spaced in the circumferential direction on one circle extending in the circumferential direction coaxially and perpendicularly to the axis. A rolling element holding member that extends in an annular shape around the axis, and is capable of being displaced in a radial direction with respect to the axis of the screw portion.
The rolling element rolls on the spherical surface and the engagement surface.

That is, the workpiece holding vise described in claim 3 is obtained by replacing the rolling groove forming member in the workpiece holding vice described in claim 2 with a rolling element holding member.
As a result, when the substrate is tilted with respect to the fixed plate, the rolling element holding member that extends in a ring shape is guided by the rolling element that follows the spherical surface formed on the opposing surface of the screw member, and is in the radial direction with respect to the axis of the screw member. Therefore, all the rolling elements always come into contact with the spherical surface and the engagement surface.

The means described in claim 4 is the work holding vise according to claim 1,
The spherical surface is formed on a spherical surface forming member extending annularly around the axis, which is slidable on the engagement surface and is radially displaceable with respect to the axis of the screw portion.
The rolling element holding means is a rolling groove recessed in the facing surface, extending in the circumferential direction coaxially and perpendicularly to the axis of the screw portion,
The rolling element rolls on the spherical surface and the rolling groove.

  That is, in the work holding vise described in claim 4, when the substrate is inclined with respect to the fixed plate, the ring is formed in accordance with the rolling elements held in the rolling grooves formed in the opposing surface of the screw member. Since the spherical surface forming member extending to the position is displaced on the engagement surface of the substrate, all the rolling elements always come into contact with the spherical surface and the rolling grooves.

The means described in claim 5 is the work holding vise according to claim 1,
The spherical surface is formed on a spherical surface forming member extending annularly around the axis, which is slidable on the engagement surface and is radially displaceable with respect to the axis of the screw portion.
When the rolling element holding means is positioned coaxially with respect to the axis of the screw portion, the plurality of rolling elements are equally spaced in the circumferential direction on one circle extending in the circumferential direction coaxially and perpendicularly to the axis. A rolling element holding member that extends in an annular shape around the axis, and is externally fitted to the threaded portion and cannot be displaced in the radial direction.
And the said rolling element rolls on the said spherical surface and the said opposing surface, It is characterized by the above-mentioned.

That is, the workpiece holding vise described in claim 5 is obtained by replacing the rolling groove formed in the opposing surface of the screw member in the workpiece holding vise described in claim 4 with a rolling element holding member.
Accordingly, when the substrate is inclined with respect to the fixed plate, the spherical surface extending in an annular shape follows the rolling element held by the rolling element holding member that is externally fitted to the screw portion of the screw member and extends in an annular shape so as not to be radially displaceable. Since the forming member is displaced on the engagement surface of the substrate, all the rolling elements always come into contact with the spherical surface and the rolling groove.

In addition, as described in claim 6 and claim 7, the spherical surface can be a convex spherical surface that is convex toward the screw portion of the screw member, or is concave toward the screw portion of the screw member. It can also be a concave spherical surface.
Further, the plurality of rolling elements are preferably spheres having the same outer diameter.
Further, the rolling element holding member can be used in combination so that the rolling elements rolling on the rolling groove are arranged at equal intervals in the circumferential direction.

Since the work holding vise of the present invention has a plurality of rolling elements interposed between the opposing surface of the screw member and the engagement surface of the substrate, the screw member is used to adjust the inclination angle of the substrate with respect to the fixed plate. When rotating, the friction generated between the screw member and the substrate can be greatly reduced. Further, by combining a spherical surface formed on one side of the opposing surface of the screw member and the engaging surface of the substrate and either one of the other surfaces, between the opposing surface of the screw member and the engaging surface of the substrate Since the plurality of rolling elements can be displaced to a predetermined position determined by the relative angle, all of the plurality of rolling elements are always in contact with the spherical surface and the opposing surface or the engagement surface, and the screw member in the conventional work holding vise In this way, only one point of the opposing surface does not contact the engagement surface of the substrate, and the force that the screw member pushes the substrate and displaces it to the fixed plate side is distributed and transmitted to a plurality of locations. .
As a result, even if the screw member is tightened to adjust the tilt angle of the substrate with respect to the fixed plate around an axis (X axis, Y axis) extending in parallel with the upper surface of the fixed plate, the friction generated between the screw member and the substrate. Since the force can prevent the substrate from rotating about an axis (Z axis) extending perpendicularly to the upper surface of the fixed plate, the inclination angle of the substrate with respect to the fixed plate can be finely adjusted very accurately and smoothly. it can.

Hereinafter, each embodiment of the work holding vise according to the present invention will be described in detail with reference to FIGS.
In the following description, the same reference numerals are used for the same parts, and redundant description is omitted. The direction in which the movable jaw slides parallel to the upper surface of the fixed plate is defined as the X-axis direction and the upper surface of the fixed plate. A direction parallel to the X axis and perpendicular to the X axis is referred to as a Y axis direction, and a direction perpendicular to the upper surface of the fixed plate is referred to as a Z axis direction.

First Embodiment First, a work holding vise according to a first embodiment will be described in detail with reference to FIGS.

A work holding vise 100 according to the first embodiment shown in FIG. 1 is similar to the conventional work holding vise 1 shown in FIG. 11, and a fixing plate 2 fixed with bolts on a work stand (not shown), and the fixing plate. 2 and a substrate 3 that extends in parallel with each other with a slight gap and is supported to be tiltable with respect to the fixed plate 2.
The substrate 3 includes a fixed jaw 4 for gripping a workpiece disposed on one end thereof, a movable jaw 5 that is slidably fitted to the slide portion 3a of the substrate 3 while facing the fixed jaw 4. It has a female screw member 6 that can be positioned and fixed to the slide portion 3a, and a screw rod 7 that is screwed into the female screw member 6.
Thus, after the female screw member 6 is positioned and fixed in accordance with the size of the workpiece to be held, the workpiece is disposed between the fixed jaw 4 and the movable jaw 5 and the screw rod 7 is tightened to firmly fix the workpiece. Can be held.

Further, as shown in FIG. 1, a tilt support mechanism 10 for tiltably supporting the substrate 3 with respect to the fixed plate 2 is disposed in the vicinity of the fixed jaw 4.
As shown in FIGS. 2 and 3, the tilt support mechanism 10 is inserted from above into a nut member 11 press-fitted from the lower surface of the fixed plate 2 and a through hole 3 c penetrating the substrate 3. A plurality of bolt members 12 screwed to the member 11 and a plurality of sheets interposed between a bottom surface of a counterbored hole 3d provided in the upper surface of the substrate 3 coaxially with the insertion hole 3c and a head portion 12a of the bolt member 12. And a spring washer 13.
A convex spherical upper surface 11a of the nut member 11 and a concave spherical sliding surface 3e provided coaxially with the insertion hole 3c on the lower surface of the substrate 3 are slidably fitted into a spherical surface.
Accordingly, the substrate 3 can be tilted with respect to the fixed plate 2 without being lifted from the nut member 11 by the downward biasing force of the spring washer 13.

Further, an X-axis tilt angle adjusting mechanism 50X for adjusting the tilt angle about the X-axis of the substrate 3 with respect to the fixed plate 2 is further more than the tilt support mechanism 10 with respect to the fixed jaw 4, as shown in FIG. It is disposed at a position separated in the Y-axis direction.
Similarly, the Y-axis tilt angle adjusting mechanism 50Y for adjusting the tilt angle about the Y-axis of the substrate 3 with respect to the fixed plate 2 is separated from the tilt support mechanism 10 in the X-axis direction as shown in FIG. Arranged in position.
Since the structures of the X-axis tilt angle adjusting mechanism 50X and the Y-axis tilt angle adjusting mechanism 50Y are the same, the following description will be made without adding X and Y to the reference numerals.

The tilt angle adjusting mechanism 50 shown in FIGS. 2 to 4 corresponds to the second aspect, and a pair of coil springs (biasing means) 54 and 55 for biasing the substrate 3 in a direction away from the fixing plate 2. have.
The tilt angle adjusting mechanism 50 has a threaded portion 51a that is screwed into the fixing plate 2 and the engagement surface 3k of the substrate 3 against the urging force of the pair of coil springs 54 and 55 when the threaded portion 51a is tightened. The screw member 51 includes an engaging portion 51b that pushes and displaces the substrate 3 toward the fixed plate 2, and an opposing surface 51c that faces the engaging surface 3k of the engaging portion 51b.
Further, the opposing surface 51c of the screw member 51 is provided with a spherical surface 51d having a center C on the axis C1 of the screw part 51b and a radius R, which is concave on the screw part 51a side.

The tilt angle adjusting mechanism 50 includes a rolling groove 52a that extends coaxially and perpendicularly to the axis C1 in the circumferential direction when positioned coaxially with the axis C1 of the threaded portion 51a on the engagement surface 3k and on the engagement surface 3k. It has a rolling groove forming member 52 that extends in an annular shape around the axis C1 and can be displaced in the radial direction with respect to the axis of the screw portion 51a.
The tilt angle adjusting mechanism 50 has a total of 12 steel balls (rolling elements) 53 interposed between the concave spherical surface 51d and the rolling groove 52a. The balls 53 are very close to each other and are arranged at substantially equal intervals in the circumferential direction on the rolling groove 52a extending in the circumferential direction. Further, the circlip 56 is provided on the threaded portion 51a of the screw member 51. Are externally fitted so that when the screw member 51 is removed from the fixing plate 2, the annularly extending rolling groove forming member 52 and the ball 53 do not fall off the screw member 51.

When the screw member 51 described above is rotated and the screw portion 51a is tightened into the female screw 2b of the fixing plate 2, the steel ball 53 rolls on the concave spherical surface 51d and on the rolling groove 52a, and the engagement is achieved. Since the portion 51b pushes the substrate 3 toward the fixed plate 2, the substrate 3 can be tilted counterclockwise around the X axis, for example.
On the other hand, when the screw member 51 is rotated to loosen the screw portion 51a, the substrate 3 is separated from the fixed plate 2 by the urging force of the pair of coil springs 54, 55. It can be tilted clockwise.

At this time, as shown in FIG. 4B, when the substrate 3 is tilted with respect to the fixing plate 2, it extends in an annular shape by a ball 53 following a concave spherical surface 51d provided in the opposing surface 51c of the screw member 51. The rolling groove forming member 52 is guided and displaced on the engagement surface 3 k of the substrate 3.
More specifically, the axis of the annularly extending rolling groove forming member 52 is coaxial with a straight line S1 extending perpendicularly to the engaging surface 3k and passing through the center C of the concave spherical surface 51d.
Thereby, even if the board | substrate 3 inclines with respect to the fixed plate 2, all the balls 53 will always be in contact with the concave spherical surface 51d and the rolling groove 52a.

That is, in the work holding vise 100 of the first embodiment, when the screw member 51 is rotated in order to adjust the inclination angle of the substrate 3 with respect to the fixed plate 2, all the balls 53 always have the concave spherical surface 51d and the rolling grooves. Since it rolls on 52, the friction which arises between the screw member 51 and the board | substrate 3 can be reduced significantly.
Further, even if the substrate 3 is inclined with respect to the fixed plate 2, all the balls 53 are always kept in contact with the concave spherical surface 51d and the rolling groove 52a. Only one point 21b of the surface 21a is not in contact with the engaging surface 3k of the substrate 3, and the force that the screw member 51 pushes the substrate 3 to displace it to the fixed plate 2 side is distributed and transmitted to a plurality of locations. Is done.
Therefore, even if the screw member 51 is tightened in order to adjust the inclination angle of the substrate 3 around the X axis or the Y axis with respect to the fixed plate 2, the substrate 3 has the Z axis due to the frictional force generated between the screw member 51 and the substrate 3. Since it can be prevented from rotating around, the inclination angle of the substrate 3 with respect to the fixed plate 2 can be finely adjusted very accurately.

Second Embodiment Next, with reference to FIG. 5, a tilt adjusting mechanism for a work holding vise according to a second embodiment corresponding to claim 3 will be described in detail.

The tilt angle adjusting mechanism 60 in the second embodiment is obtained by replacing the rolling groove forming member 52 in the tilt angle adjusting mechanism 50 of the first embodiment described above with a rolling element holding member 63.
More specifically, the tilt angle adjusting mechanism 60 is configured to resist the urging force of a screw portion 61a screwed to the fixing plate 2 and a pair of coil springs (not shown) when the screw portion 61a is tightened. A screw member 61 having an engagement portion 61b that pushes the engagement surface 3k to displace the substrate 3 toward the fixed plate 2 and an opposing surface 61c that faces the engagement surface 3k of the engagement portion 61b. Have.
The opposing surface 61c of the screw member 61 is provided with a spherical surface 61d having a center C on the axis C1 of the screw portion 61b and a radius R, which is concave on the screw portion 61a side.

In addition, a total of twelve steel balls 62 are interposed between the concave spherical surface of the screw member 61, 61 d and the engagement surface 3 k of the substrate 3. These balls 62 are made of synthetic resin and held in the respective pockets of the rolling element holding member 63 that extends in an annular shape, and are arranged at equal intervals in the circumferential direction.
The inner diameter of the rolling element holding member 63 is larger than the outer diameter of the threaded portion (shaft portion) 61a of the screw member 61, and can be displaced in the radial direction with respect to the axis C1 of the threaded portion 61a.

  Accordingly, as shown in FIG. 5A, when the substrate 3 extends in parallel to the fixed plate 2, the ball 62 held by the annularly extending rolling element holding member 63 is aligned with the axis of the screw portion 61a. It lies on one circle coaxial with the axis C1 on a plane extending perpendicular to C1.

On the other hand, as shown in FIG. 5B, when the substrate 3 is tilted with respect to the fixing plate 2, the rolling member holding is guided by the ball 62 following the concave spherical surface 61d of the screw member 61 and extends in an annular shape. The member 63 is displaced in the radial direction with respect to the axis C1 of the screw portion 61a on the engagement surface 3k of the substrate 3.
More specifically, the axis of the rolling element holding member 63 extending in an annular shape is coaxial with a straight line S1 extending perpendicularly to the engagement surface 3k and passing through the center C of the concave spherical surface 61d.
Thereby, even if the board | substrate 3 inclines with respect to the fixing plate 2, all the balls 62 will always contact with the concave spherical surface 61d and the engaging surface 3k.

That is, in the tilt angle adjusting mechanism 60 in the work holding vise according to the second embodiment, when the screw member 61 is rotated to adjust the tilt angle of the substrate 3 with respect to the fixed plate 2, all the balls 62 have the concave spherical surface 61d and Since it rolls on the engagement surface 3k, the friction produced between the screw member 61 and the board | substrate 3 can be reduced significantly.
Further, even if the substrate 3 is inclined with respect to the fixed plate 2, all the balls 62 continue to contact the concave spherical surface 61d and the engaging surface 3k, so that the opposing surface is similar to the screw member 21 in the conventional work holding vise 1. Only one point 21b of 21a does not come into contact with the engaging surface 3k of the board 3, and the force that the screw member 61 pushes the board 3 to displace it to the fixed plate 2 side is distributed and transmitted to a plurality of places. The
Therefore, even if the screw member 61 is tightened in order to adjust the inclination angle of the substrate 3 with respect to the fixed plate 2 around the X axis or the Y axis, the substrate 3 is moved to the Z axis by the frictional force generated between the screw member 61 and the substrate 3. Therefore, the inclination angle of the substrate 3 with respect to the fixed plate 2 can be finely adjusted with high accuracy.
Furthermore, in the tilt angle adjusting mechanism 60 of the second embodiment, the above-described rolling groove forming member 52 is omitted, and therefore, from the engagement surface 3k of the substrate 3 to the upper surface of the engagement portion 61b of the screw member 61. The dimensions can be reduced.
Further, since all the balls 62 are held by the rolling element holding member 63, even if the screw member 61 is removed from the fixed plate 2, the balls 62 are not dropped and scattered.

Third Embodiment Next, with reference to FIG. 6, a tilt adjustment mechanism for a work holding vise according to a third embodiment corresponding to claim 4 will be described in detail.

The screw member 71 in the tilt angle adjusting mechanism 70 shown in FIG. 6 is affected by the urging force of a screw portion 71a screwed to the fixing plate 2 and a pair of coil springs (not shown) when the screw portion 71a is tightened. On the other hand, an engagement portion 71b that pushes the engagement surface 3k of the substrate 3 to displace the substrate 3 toward the fixing plate 2 and an opposing surface 71c that faces the engagement surface 3k of the engagement portion 71b. Have.
The opposing surface 71c of the screw member 71 is provided with a rolling groove 71d extending coaxially and perpendicularly to the axis C1 of the screw portion 71a in the circumferential direction.

In addition, the tilt angle adjusting mechanism 70 includes a spherical surface forming member 72 that is disposed on the engagement surface 3k of the substrate 3 and extends annularly around the screw portion 71a of the screw member 71.
The spherical surface forming member 72 has a center C on the axis C1 of the screw portion 71a and a radius R of the screw member 71 when the spherical surface forming member 72 is coaxial with the axis C1 of the screw portion 71a. A convex spherical surface 72a that faces the opposing surface 71c is formed.

A total of twelve steel balls 73 are interposed between the rolling groove 71 d of the screw member 71 and the convex spherical surface 72 a of the spherical surface forming member 72.
Further, a circlip 74 is externally fitted to the screw portion 71 a of the screw member 71, and when the screw member 71 is removed from the fixing plate 2, the spherically formed spherical member 72 and the ball 73 are dropped from the screw member 71. It is supposed not to.

  Accordingly, as shown in FIG. 6A, when the substrate 3 extends in parallel to the fixed plate 2, the spherical surface forming member 72 extending in an annular shape is coaxial with the axis C1 of the screw portion 71a, and The ball 73 is in contact with the rolling groove 71d and the convex spherical surface 72a.

  On the other hand, as shown in FIG. 6B, when the substrate 3 is inclined with respect to the fixed plate 2, the convex spherical surface 72a follows the ball 73 held in the rolling groove 71d, thereby causing an annular shape. Since the spherical surface forming member 72 extending in the radial direction is displaced in the radial direction with respect to the axis C1 of the threaded portion 71a on the engagement surface 3k of the substrate 3, all the balls 73 continue to contact the rolling groove 71d and the convex spherical surface 72a. Become.

That is, in the tilt angle adjusting mechanism 70 in the work holding vise of the third embodiment, when the screw member 71 is rotated to adjust the tilt angle of the substrate 3 with respect to the fixed plate 2, all the balls 73 are rolling grooves 71d. And since it rolls on the convex spherical surface 72a, the friction which arises between the screw member 71 and the board | substrate 3 can be reduced significantly.
Further, even if the substrate 3 is inclined with respect to the fixed plate 2, all the balls 73 continue to contact the rolling groove 71d and the convex spherical surface 72a. Only one point 21b of 21a does not come into contact with the engagement surface 3k of the substrate 3, and the force that the screw member 71 pushes the substrate 3 to displace it to the fixed plate 2 side is distributed and transmitted to a plurality of locations. .
Therefore, even if the screw member 71 is tightened in order to adjust the inclination angle of the substrate 3 with respect to the fixed plate 2 around the X axis or the Y axis, the substrate 3 is moved to the Z axis by the frictional force generated between the screw member 71 and the substrate 3. Therefore, the inclination angle of the substrate 3 with respect to the fixed plate 2 can be finely adjusted with high accuracy.

Fourth Embodiment Next, with reference to FIG. 7, a tilt adjustment mechanism for a work holding vise according to a fourth embodiment corresponding to claim 5 will be described in detail.

The tilt angle adjusting mechanism 80 in the fourth embodiment is provided with a rolling element holding member 84 instead of the rolling groove 71d in the tilt angle adjusting mechanism 70 of the third embodiment described above.
More specifically, the screw member 81 in the tilt angle adjusting mechanism 80 shown in FIG. 7 includes a screw portion 81a screwed to the fixing plate 2 and a pair of coil springs (not shown) when the screw portion 81a is tightened. The engagement portion 81b that pushes the engagement surface 3k of the substrate 3 against the urging force and displaces the substrate 3 to the fixing plate 2 side, and faces the engagement surface 3k of the engagement portion 81b. However, it has the opposing surface 81c extended perpendicularly | vertically with respect to the axis line of the thread part 81a.

Further, the tilt angle adjusting mechanism 80 has a spherical surface forming member 82 that is disposed on the engagement surface 3k of the substrate 3 and extends annularly around the screw portion 71a of the screw member 81.
The spherical surface forming member 82 has a center C on the axis C1 of the screw portion 81a and a radius of R when the screw member 81a is coaxial with the axis C1 of the screw portion 81a. A convex spherical surface 82a that faces the opposing surface 81c is formed.

A total of twelve steel balls 83 are interposed between the opposing surface 81 c of the screw member 81 and the convex spherical surface 82 a of the spherical surface forming member 82.
These balls 83 are made of synthetic resin and held in the respective pockets of the rolling element holding member 84 that extends in an annular shape, and are arranged at equal intervals in the circumferential direction.
The annularly extending rolling element holding member 84 is fitted on the screw portion 81a or the shaft portion of the screw member 81 and cannot be displaced in the radial direction with respect to the axis C1 of the screw portion 81a.

  Accordingly, as shown in FIG. 7A, when the substrate 3 extends in parallel to the fixed plate 2, the spherical surface forming member 82 extending in an annular shape is coaxial with the axis C1, and all the balls 83 are formed. The screw member 81 is in contact with the opposing surface 81c and the convex spherical surface 82a.

  On the other hand, as shown in FIG. 7B, when the substrate 3 is tilted with respect to the fixed plate 2, the convex spherical surface 82a follows the ball 83 held by the rolling element holding member 84. Since the annularly extending spherical surface forming member 82 is displaced in the radial direction with respect to the axis C1 of the threaded portion 81a on the engagement surface 3k of the substrate 3, all the balls 83 continue to contact the opposing surface 81c and the convex spherical surface 82a.

That is, in the tilt angle adjusting mechanism 80 in the work holding vise of the fourth embodiment, when the screw member 81 is rotated to adjust the tilt angle of the substrate 3 with respect to the fixed plate 2, all the balls 83 are opposed to the opposing surfaces 81c and Since it rolls on the convex spherical surface 82a, the friction generated between the screw member 81 and the substrate 3 can be greatly reduced.
Further, even if the substrate 3 is inclined with respect to the fixed plate 2, all the balls 83 continue to contact the opposing surface 81c and the convex spherical surface 82a, so that the opposing surface 21a is similar to the screw member 21 in the conventional work holding vise 1. Only one point 21b does not come into contact with the engagement surface 3k of the substrate 3, and the force that the screw member 71 pushes the substrate 3 to displace it to the fixed plate 2 side is distributed and transmitted to a plurality of locations.
Therefore, even if the screw member 81 is tightened in order to adjust the inclination angle of the substrate 3 with respect to the fixed plate 2 around the X axis or the Y axis, the substrate 3 is moved to the Z axis by the frictional force generated between the screw member 81 and the substrate 3. Therefore, the inclination angle of the substrate 3 with respect to the fixed plate 2 can be finely adjusted with high accuracy.

Fifth Embodiment Next, with reference to FIG. 8, a tilt angle adjusting mechanism 90 in a work holding vise according to a fifth embodiment will be described.

The tilt angle adjusting mechanism 90 is obtained by replacing the screw member 51 in the tilt angle adjusting mechanism 50 of the first embodiment described above with a screw member 91.
More specifically, the screw member 91 is a board that resists the urging force of a pair of coil springs (not shown) when the screw part 91a is tightened and the screw part 91a is screwed into the fixing plate 2. The engagement portion 91b that pushes the engagement surface 3k of the third plate 3 to displace the substrate 3 toward the fixed plate 2 and the axis of the screw portion 91a while facing the engagement surface 3k of the engagement portion 91b. A screw member 51 having a vertically extending facing surface 91c is provided.
Further, the opposing surface 91c of the screw member 91 is provided with a convex spherical surface 91d having a center C on the axis C1 of the screw portion 91b and a radius R, which is convex toward the screw portion 51a. .
As a result, the tilt angle adjusting mechanism 90 also operates in exactly the same manner as the tilt angle adjusting mechanism 50 of the first embodiment described above.

6th Embodiment Next, with reference to FIG. 9, the inclination angle adjustment mechanism 110 in the workpiece holding vise of 6th Embodiment is demonstrated.

The tilt angle adjusting mechanism 110 is obtained by replacing the spherical surface forming member 72 in the tilt angle adjusting mechanism 70 of the third embodiment described above with a spherical surface forming member 111.
More specifically, the spherical surface forming member 111 includes a spherical surface forming member 72 that is disposed on the engagement surface 3k of the substrate 3 and extends annularly around the axis C1 of the screw portion 71a.
The spherical surface forming member 111 has a center C on the axis C1 of the screw portion 71a and a radius R of the screw member 71 when the spherical surface forming member 111 is coaxial with the axis C1 of the screw portion 71a. A convex spherical surface 111a that faces the facing surface 71c is formed.
As a result, the tilt angle adjusting mechanism 110 also operates in exactly the same manner as the tilt angle adjusting mechanism 70 of the third embodiment described above.

7th Embodiment Next, with reference to FIG. 10, the workpiece holding vice of 7th Embodiment is demonstrated.

  The workpiece holding vise 120, 125 of the seventh embodiment shown in FIG. 10 is such that the amount of displacement in the Y-axis direction generated in the workpiece W is minimized when the tilt angle of the held workpiece W is adjusted around the Y-axis. It is a devised one.

  More specifically, in the work holding vise 120 shown in FIG. 10A, when the substrate 3 is in a reference position parallel to the fixed plate, the screw member 51 of the X-axis tilt angle adjusting mechanism 50X. The center Q1 of the concave spherical surface 51d having the radius R1 and the center Q2 of the convex spherical surface 11a having the radius R2 of the nut member 11 in the tilting support mechanism 10 are both present on the reference line H extending parallel to the Y axis.

  Therefore, when adjusting the tilt angle of the substrate 3 around the Y axis, the substrate 3 tilts around the reference line H extending parallel to the Y axis, and the displacement of the workpiece W held on the substrate 3 in the Y axis direction is zero. Therefore, the tilt angle adjustment of the workpiece W can be performed very accurately.

Furthermore, in the workpiece holding vise 125 shown in FIG. 10B, the tilt support mechanism 15 is also changed.
More specifically, the tilting support mechanism 15 is inserted into the nut member 121 press-fitted from the upper surface of the fixing plate 2 and the through-hole 3c penetrating the substrate 3 from above and screwed into the nut member 121. And a plurality of spring washers 13 interposed between a bottom surface of a counterbored hole 3d provided in the upper surface of the substrate 3 coaxially with the insertion hole 3c and a head portion 12a of the bolt member 12. Have.
Thereby, the convex spherical upper surface 121a of the nut member 121 and the concave spherical sliding surface 3e provided coaxially with the insertion hole 3c on the lower surface of the substrate 3 are slidably in contact with each other. 3 can be tilted with respect to the fixed plate 2 without being lifted by the downward biasing force of the spring washer 13.
Further, the center Q3 of the convex spherical surface 121a having the radius R3 of the nut member 121 exists on the reference line H extending parallel to the Y axis.

Further, the center Q4 of the concave spherical surface 61d having the radius R4 of the screw member 61 in the X-axis tilt angle adjusting mechanism 60X exists on the reference line H described above, and the value of the radius R4 is the convex spherical surface of the nut member 121 described above. It is equal to the radius R3 of 121a.
Thereby, the vertex 61e of the concave spherical surface 61d of the screw member 61 and the vertex 121b of the convex spherical surface 121a of the nut member 121 are both equal in distance from the reference line H.

  Therefore, when adjusting the tilt angle of the substrate 3 around the Y axis, the substrate 3 tilts around the reference line H extending parallel to the Y axis, and the displacement of the workpiece W held on the substrate 3 in the Y axis direction is zero. Therefore, the tilt angle adjustment of the workpiece W can be performed very accurately.

As mentioned above, although each embodiment of the workpiece holding vise which concerns on this invention was described in detail, it cannot be overemphasized that this invention is not limited by embodiment mentioned above and a various change is possible.
For example, in each embodiment described above, a ball is used as the rolling element, but it goes without saying that a needle roller, a taper roller, or the like can be used.

The principal part fracture | rupture perspective view which shows the workpiece | work holding vise of 1st Embodiment. Side surface sectional drawing in alignment with the A-break line in FIG. Front sectional drawing along the B-break line in FIG. The longitudinal cross-sectional view which expands and shows the inclination adjustment mechanism shown in FIG. The longitudinal cross-sectional view which expands and shows the inclination-angle adjustment mechanism of 2nd Embodiment. The longitudinal cross-sectional view which expands and shows the inclination-angle adjustment mechanism of 3rd Embodiment. The longitudinal cross-sectional view which expands and shows the inclination adjustment mechanism of 4th Embodiment. The longitudinal cross-sectional view which expands and shows the inclination adjustment mechanism of 5th Embodiment. The longitudinal cross-sectional view which expands and shows the inclination adjustment mechanism of 6th Embodiment. Side surface sectional drawing which shows the workpiece holding vise of 7th Embodiment. The perspective view which shows the conventional workpiece holding vise. The top view of the workpiece holding vise shown in FIG. Side surface sectional drawing along the C-break line in FIG. FIG. 13 is a front cross-sectional view along the D-break line in FIG. 12. Side surface sectional drawing along the E-break line in FIG. The longitudinal cross-sectional view which shows the conventional inclination adjustment mechanism.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Conventional workpiece holding vise 2 Fixed plate 3 Substrate 4 Fixed jaw 5 Movable jaw 10 Tilt support mechanism 11 Nut member 12 Bolt member 20 X axis tilt angle adjusting mechanism 30 Y axis tilt angle adjusting mechanism 40 Z axis tilt angle adjusting mechanism 50, 50X, 50Y Tilt adjustment mechanism 51 of first embodiment Screw member 52 Rolling groove forming member 53 Ball (rolling element)
60 Tilt adjustment mechanism 61 of the second embodiment 61 Screw member 62 Ball 63 Rolling body holding member 70 Tilt adjustment mechanism 71 of the third embodiment Screw member 72 Spherical surface forming member 73 Ball 80 Tilt adjustment mechanism 81 of the fourth embodiment Screw member 82 Spherical surface forming member 83 Ball 84 Rolling body holding member 90 Tilt angle adjusting mechanism 91 of the fifth embodiment Screw member 100 Work holding vise 110 of the first embodiment Tilt angle adjusting mechanism 111 of the sixth embodiment Spherical surface forming member 120 of the seventh embodiment Work holding vise

Claims (7)

A vice for holding and fixing a workpiece,
A fixed plate fixed to the work stand;
A substrate disposed so as to extend in parallel with a gap with respect to the fixed plate;
A support mechanism for supporting the substrate to be tiltable about three axes with respect to the fixed plate;
An inclination adjustment mechanism for adjusting the inclination angle of the substrate with respect to the fixed plate,
The tilt adjustment mechanism is
Biasing means for biasing the substrate in a direction away from the fixed plate;
A screw portion that is screwed to the fixing plate; and when the screw portion is tightened, the engagement surface of the substrate is pushed against the urging force of the urging means to bring the substrate to the fixing plate side. A screw member having an engaging portion to be displaced, and an opposing surface extending while facing the engaging surface of the engaging portion;
Spherical surface forming means for forming a spherical surface whose center is on the axis of the threaded portion on either one of the facing surface and the engaging surface;
A plurality of rolling elements interposed between either one of the opposing surface and the engagement surface and the spherical surface;
Rolling element holding means for holding the plurality of rolling elements such that the plurality of rolling elements are positioned on a circle extending around an axis of the screw portion;
A work holding vise characterized by comprising: The spherical surface is formed on the opposing surface of the screw member,
The rolling element holding means has a rolling groove that extends in the circumferential direction coaxially with the axis when positioned coaxially with respect to the axis of the screw part, and on the engagement surface with respect to the axis of the screw part. A rolling groove forming member that is radially displaceable and extends annularly around the axis;
The rolling element rolls on the spherical surface and the rolling groove.
The work holding vise according to claim 1, wherein: The spherical surface is formed on the opposing surface of the screw member,
When the rolling element holding means is positioned coaxially with respect to the axis of the threaded portion, the rolling elements are equally spaced in the circumferential direction on one circle extending in the circumferential direction coaxially and perpendicularly to the axis. A rolling element holding member that extends in an annular shape around the axis, and is capable of being displaced in a radial direction with respect to the axis of the screw portion.
And the rolling element rolls on the spherical surface and the engagement surface,
The work holding vise according to claim 1, wherein: The spherical surface is formed on a spherical surface forming member that slides on the engagement surface and is radially displaceable with respect to the axial line of the threaded portion and extends annularly around the axial line,
The rolling element holding means is a rolling groove that is recessed in the facing surface and extends in the circumferential direction coaxially and perpendicularly to the axis of the screw portion.
The rolling element rolls on the spherical surface and the rolling groove.
The work holding vise according to claim 1, wherein: The spherical surface is formed on a spherical surface forming member that slides on the engagement surface and is radially displaceable with respect to the axial line of the threaded portion and extends annularly around the axial line,
The rolling element holding means holds the plurality of rolling elements at equal intervals in the circumferential direction on one circle extending in the circumferential direction coaxially with the axis when positioned coaxially with the axis of the screw portion. And a rolling element holding member that is fitted around the threaded portion and cannot be displaced in the radial direction, and extends annularly around the axis,
The opposing surface extends perpendicular to the axis of the screw portion,
The rolling element rolls on the spherical surface and on the opposing surface;
The work holding vise according to claim 1, wherein:   6. The work holding vise according to claim 1, wherein the spherical surface is a convex spherical surface that is convex toward the threaded portion.   The work holding vise according to any one of claims 1 to 5, wherein the spherical surface is a concave spherical surface that is concave toward the threaded portion.

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