JP3898423B2 - Rotary dresser for surface grinder - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rotary dresser device for a surface grinder, in which a truing grindstone and / or a dressing grindstone can move in a direction substantially perpendicular to the grindstone axis.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a rotary dresser device used for a double-head surface grinding machine or the like is a swing type device that swings the whole as described in JP-A-10-286773.
[0003]
This rotary dresser device is intended for the truing and dressing of the grindstone surface of a cup-shaped grinding wheel, and has a rocking frame disposed laterally below a pair of grinding wheels, and the rocking frame. A dressing shaft in which a truing grindstone and a dressing grindstone are attached to the end of the rocking frame on the grinding wheel side by a rocking shaft arranged in parallel with the grindstone shaft. Are arranged in the vertical direction, and the drive means for rotating the dressing shaft is arranged at the opposite end of the swinging frame, and the swinging drive means for the swinging frame is mounted on one of the bearing boxes that support the swinging shaft. is doing.
[0004]
Then, while the rocking frame is reciprocally swung up and down by the rocking drive means, the dressing shaft is driven around the axis by the rotation driving means, and the dressing (shape) of the grinding stone surface of the grinding stone is performed by the dressing grindstone. ), And truing (sharpening) the grinding wheel surface with a truing wheel.
[0005]
[Problems to be solved by the invention]
The conventional rotary dresser device performs dressing and truing while reciprocatingly swinging the swinging frame in the vertical direction. Therefore, the entire swinging frame including the rotation driving unit is driven by the swinging driving unit via the swinging shaft. Since there is a problem that the mass on the swing side is large and the entire apparatus becomes very large, and the workpiece is ground near the grinding wheel surface, There is a problem that there is no room and workability is poor.
[0006]
In addition, a dressing shaft is arranged in the vertical direction at the end of the rocking frame on the grinding wheel side, and a rotation driving means is arranged on the other end of the rocking frame so that the driving shaft is parallel to the dressing axis. Since the dress shaft is rotationally driven by the drive shaft of the driving means via a belt transmission mechanism arranged along the swing frame, there is a problem that the structure of the drive system of the dress shaft becomes complicated.
[0007]
In view of such conventional problems, the present invention has a simple structure and can be reduced in size, and after dressing and / or truing, it can be retreated to the machine frame side to secure a space, and the grinding wheel can be dressed and / or truing. An object of the present invention is to provide a rotary dresser device for a surface grinder capable of easily and reliably.
[0008]
[Means for Solving the Problems]
The present invention relates to a dressing shaft in which a dressing grindstone and / or a truing grindstone is mounted in a main body case supported by a machine frame via an inclination adjusting means, and the dressing shaft is disposed substantially perpendicular to the grindstone shaft. For the dressing grindstone and / or truing, comprising an intermediate shaft that rotatably supports the linear shaft and a linear bearing that is supported by the main body case and that slidably supports the intermediate shaft in the axial direction. A first drive means mounted on the intermediate shaft on the opposite side of the grindstone and rotating the dress shaft; and provided in the main body case between the machine frame and the first drive means; Second tilting means capable of moving and positioning in the axial direction, wherein the tilt adjusting means has a spherical concave portion and a spherical convex portion in surface contact with the spherical concave portion, and is substantially equal in the circumferential direction of the main body case. Little In which are arranged three Kutomo.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0010]
The drawing illustrates a rotary dresser device of a horizontal double-head surface grinding machine. 1 to 3, reference numeral 1 denotes a machine frame of a horizontal double-sided surface grinding machine. On this machine frame 1, a pair of grinding wheels 3 mounted on a grindstone shaft 2 are arranged facing each other. A rotary dresser device 4 is arranged below the grinding wheel 3 in the vertical direction. Note that a cup-shaped diamond wheel is used for the grinding wheel 3.
[0011]
The rotary dresser device 4 includes a dressing shaft 7 on which a dressing grindstone 5 and a truing grindstone 6 are mounted and arranged substantially at right angles to the grindstone shaft 2, and an intermediate shaft that rotatably supports the dress shaft 7 about its axis. 8, a first drive means 9 for rotationally driving the dress shaft 7, a linear bearing 10 for supporting the intermediate shaft 8 slidably in its axial direction, and holding the linear bearing 10 and supported by the machine frame 1 The main body case 11, the second driving means 12 that enables the intermediate shaft 8 to be moved and positioned in the axial direction, and the three flanges 24 of the main body case 11 are arranged at approximately equal intervals in the circumferential direction. An inclination adjusting means 25 for fixing the main body case 11 to the machine frame 1 is provided so that the inclination can be adjusted.
[0012]
The dressing grindstone 5 is for dressing the grindstone surface of the grinding grindstone 3, and the truing grindstone 6 is for truing the grindstone surface of the grinding grindstone 3. The dressing grindstone 5 and the truing grindstone 6 are vertically moved to the upper end of the dressing shaft 7 via the holding plate 13, bolts 14 and the like so that the outer peripheral surfaces thereof can selectively contact the grindstone surface of the grinding grindstone 3. It is detachably mounted at predetermined intervals in the direction. Two dressing wheels 5 are arranged on the upper side of the truing wheel 6, but one dressing wheel 5 may be used. The dressing shaft 7 may be provided with only one of the dressing grindstone 5 and the truing grindstone 6.
[0013]
The dress shaft 7 is provided in the vertical direction and is disposed substantially concentrically within the cylindrical intermediate shaft 8. The dress shaft 7 is rotatably supported on the intermediate shaft 8 via the bearing 15 at the upper end side near the lower side of the truing grindstone 6, and is supported rotatably on the intermediate shaft 8 via the bearing 16 at the lower end side. Has been.
[0014]
The first driving means 9 is for rotating the dressing grindstone 5 and the truing grindstone 6 via the dressing shaft 7 during dressing and truing of the grinding grindstone 3, and is driven by a drive motor such as a servo motor. A source 17 is provided, and is arranged in series at the lower end of the intermediate shaft 8 on the side opposite to the dressing grindstone 5 and the truing grindstone 6. The drive source 17 is detachably attached to the lower end of the intermediate shaft 8 so that the drive shaft 18 is positioned on the axis of the dress shaft 7, and the drive shaft 18 has a shaft joint 19 at the lower end of the dress shaft 7. Are detachably connected to each other.
[0015]
The intermediate shaft 8 is supported by a cylindrical linear bearing 10 in the body case 11 so as to be slidable in the vertical direction, and the dressing grindstone 5 or the truing grindstone 6 is selectively applied to the grindstone surface of the grinding wheel 3. It can move up and down between the corresponding dressing position and truing position and the retreat position where the dressing grindstone 5 and the truing grindstone 6 are separated from the grindstone 3 and retreat.
[0016]
The linear bearing 10 has a cylindrical shape that slidably holds the intermediate shaft 8 and is fitted and fixed substantially concentrically to the inner peripheral side of the main body case 11, and concentrically to the outer peripheral side of the intermediate shaft 8. A loosely-fitted cylindrical bearing case 20 is arranged on the inner peripheral surface side of the bearing case 20 in a substantially equal distribution (for example, six equal distributions) in the circumferential direction, and in the sliding direction (vertical direction) of the intermediate shaft 8. A plurality of ball rows 21 arranged in rows are provided, and the outer peripheral surface of the intermediate shaft 8 is supported via the ball rows 21. The linear bearing 10 is divided into a plurality of parts in the vertical direction, but may be integrated. Further, a plurality of linear bearings 10 may be provided at predetermined intervals in the vertical direction.
[0017]
The main body case 11 has a substantially cylindrical shape that is long enough to accommodate the intermediate shaft 8, and a linear bearing 10 is fitted between end plates 22 and 23 that are detachably attached to both upper and lower ends of the main body case 11. The main body case 11 has a flange 24 integrally formed on the outer periphery of the upper side in the vicinity of the dressing grindstone 5 and the truing grindstone 6, and the lower side of the rib 24 is loosely fitted in the mounting hole 26 of the machine frame 1. It is mated. The main body case 11 is covered with a protective cover 27 so that the upper side of the flange 24 is relatively movable up and down, and the protective cover 27 is detachably fixed to the intermediate shaft 8 in the vicinity of the lower side of the truing grindstone 6. Has been. On the lower side of the main body case 11, there is a gap 28 on the inner periphery thereof, and the drive source 17 side can be fitted into the gap 28 when the intermediate shaft 8 is raised.
[0018]
The second drive means 12 moves the intermediate shaft 8 up and down and positions between the dressing position, the truing position where the dressing grindstone 5 and the truing grindstone 6 correspond to the grinding grindstone 3, and the retracted position retracted from the grinding grindstone 3. Is disposed below the machine casing 1 and below the main body case 11. The second driving means 12 moves the dressing grindstone 5 up and down within a required range at the dressing position and the truing grindstone 6 at the truing position.
[0019]
The second driving means 12 includes a rack gear 29 formed in the vertical direction on the outer peripheral surface on the lower side of the intermediate shaft 8, a worm gear 30 meshing with the rack gear 29, a worm 31 meshing with the worm gear 30, And a drive source 32 such as a servo motor for driving the worm 31. The worm gear 30 is rotatably supported in a gear case 33 by a gear shaft 34 that is substantially perpendicular to the intermediate shaft 8 and is connected to the rack gear 29 on the intermediate shaft 8 side in a notch 35 formed in the linear bearing 10. Meshed. The gear shaft 34 is provided on the side of the lid body 36 that is detachably attached to the gear case 33.
[0020]
The gear case 33 is detachably attached to the outer surface of the main body case 11 corresponding to the notch 35, and the worm gear 31 is provided with a worm 31 below the worm gear 30 in the gear case 33. The shaft 37 is rotatably supported by a bearing. The worm shaft 37 is arranged in a direction substantially perpendicular to the axial direction of the intermediate shaft 8 and the gear shaft 34, and is linked to the drive shaft 41 of the drive source 32 via the reduction gear train 40 in the reduction case 39. . The drive source 32 is detachably attached to the gear case 33 via the speed reduction case 39, and the drive shaft 41 is disposed substantially parallel to the worm shaft 37.
[0021]
As shown in FIGS. 4 and 5, the tilt adjusting means 25 includes a ring-shaped receiving body 42 disposed on the machine frame 1 on the outer periphery of the main body case 11, and a spherical washer 43 disposed on the receiving body 42. A vertical screw hole 44 formed in the flange portion 24, an adjustment screw body 45 screwed into the screw hole 44, and an operating body 46 for the adjustment screw body 45 disposed on the upper side of the flange portion 24, Tighten from the outside of the machine frame 1, that is, from above, to the operating body 46, the adjusting screw body 45, the spherical washer 43 and the receiving body 42 in a loose fit and screwed into the screw holes on the machine frame 1 side. Bolt 47 is provided.
[0022]
The spherical washer 43 has a spherical recess 43a formed on the upper side, and is fitted into a recess 48 formed on the lower side of the screw hole 44 of the flange 24. In the adjustment screw body 45, a spherical protrusion 45a that comes into surface contact with the spherical recess 43a of the spherical washer 43 is formed on the lower side, and an engagement recess 45b is formed on the upper surface side in the diameter direction. The operating body 46 is used for operating the adjusting screw body 45, and a tool engaging portion 46a for rotating operation is provided at an appropriate place such as forming the outer periphery in a six-stroke shape, and the adjusting screw body 45 is provided in the screw hole 44. An engaging projection 46b that engages with the engaging recess 45b is provided, and is interposed between the head 47a and the flange 24 of the tightening bolt 47.
[0023]
The adjusting screw body 45 and the operating body 46 are rotated by the adjusting screw body 45 within the screw hole 44 when the operating body 46 is rotated, and the shaft of the tightening bolt 47 between the adjusting screw body 45 and the operating body 46 is adjusted. The engaging protrusions 46b may be provided on the adjustment screw body 45 side, and the engaging recesses 45b may be provided on the operating body 46 side.
[0024]
In this rotary dresser device 4, dressing and truing of the grinding wheel 3 is performed as follows. That is, when dressing or truing the grinding wheel surface of the grinding wheel 3, the dressing shaft 7 is driven by the first driving means 9, and the dressing grinding wheel 5 and the truing grinding wheel 6 are rotated around the dressing shaft 7. The intermediate shaft 8 is raised by the second drive means 12 to the dressing position where the dressing grindstone 5 contacts the grinding wheel 3 or to the truing position where the truing grindstone 6 contacts the grinding wheel 3. 5 or the truing grindstone 6 is reciprocated in the vertical direction within the required range while the rotating dressing grindstone 5 or the truing grindstone 6 is used for dressing or truing the grinding surface of the rotating grinding grindstone 3.
[0025]
When the drive source 32 of the second drive means 12 is activated, the worm gear 30 that meshes with the rack gear 29 on the intermediate shaft 8 side rotates from the drive shaft 41 via the reduction gear train 40, the worm shaft 37, and the worm 31. As the worm gear 30 rotates forward and backward, the intermediate shaft 8 slides in the axial direction and moves up and down while being guided by the linear bearing 10.
[0026]
Accordingly, when dressing and truing the grinding wheel 3, the intermediate shaft 8 side including the dressing wheel 5, the truing wheel 6, the dressing shaft 7 and the first driving means 9 may be slid in the axial direction. Compared with the case of the swing type, the mass on the sliding side is reduced, and the structure can be simplified and reduced in size. In addition, since the intermediate shaft 8 that supports the dress shaft 7 is reciprocated in the axial direction, the support rigidity can be easily secured as compared with the case where the dress shaft 7 side is moved in the axial direction. Truing can be easily and reliably performed with high accuracy.
[0027]
Further, a cylindrical linear bearing 10 is provided in the body case 11, and the intermediate shaft 8 is supported by the linear bearing 10 so as to be slidable in the axial direction from the outer peripheral side. Compared with the case of supporting and guiding in a slidable direction, the entire body including the main body case 11 can be made relatively small in diameter and reduced in size.
[0028]
The second driving means 12 for driving the intermediate shaft 8 in the axial direction includes a rack gear 29 on the intermediate shaft 8 side and a worm gear 30 on the main body case 11 side that meshes with the rack gear 29, and the worm gear 30. Is driven by a drive source 32 outside the main body case 11, so that it can be simplified as compared with those using a screw shaft or the like. Moreover, since the worm 31 and the worm gear 30 are used, the positional accuracy of the dressing grindstone 5 and the truing grindstone 6 can be sufficiently secured and maintained despite the use of the rack system.
[0029]
Furthermore, a notch 35 is formed in a part of the circumferential direction of the linear bearing 10, and the worm gear 30 disposed in the notch 35 is meshed with the rack on the intermediate shaft 8 side. The axial length of the entire apparatus including the intermediate shaft 8 and the like can be reduced while sufficiently securing a range in which the shaft 8 can be supported in the axial direction.
[0030]
By adjusting the three inclination adjusting means 25, the inclination of the dress axis 7 can be adjusted in an arbitrary direction within a predetermined range. In this adjustment, first, the tightening bolt 47 is loosened, and then the operating body 46 is appropriately rotated by a tool in a predetermined direction. Then, the adjustment screw body 45 screwed into the screw hole 44 of the flange portion 24 rotates in a predetermined direction, and the adjustment screw body 45 rises or descends relative to the flange portion 24.
[0031]
In this case, since the spherical protrusion 45a of the adjustment screw body 45 is in surface contact with the spherical recess 43a of the spherical washer 43, the adjustment screw body 45 is relatively inclined on the spherical washer 43 according to the amount of rotation. Accordingly, by appropriately adjusting the adjustment screw bodies 45 of the three inclination adjusting means 25, the entire body case 11 side including the dress shaft 7 is inclined in an arbitrary direction, and the inclination of the dress shaft 7 is set in an arbitrary direction. Easy to adjust. Thereafter, the fastening bolt 47 may be fastened and fixed. When the tightening bolt 47 is tightened, the spherical protrusion 45a of the adjustment screw body 45 can be fixed in a state of being in surface contact with the spherical recess 43a of the spherical washer 43.
[0032]
As mentioned above, although embodiment of this invention was explained in full detail, this invention is not limited to this embodiment. For example, in the embodiment, a horizontal double-sided surface grinding machine is illustrated, but a vertical double-headed surface grinding machine in which a pair of grinding wheels 3 are arranged up and down, or a single-head surface grinding in which the grinding wheel 3 is arranged only on one side. The same can be applied to the board.
[0033]
In the embodiment, an example in which two dressing grindstones 5 and one truing grindstone 6 are provided on the upper end side of the dressing shaft 7 is illustrated, but one dressing grindstone 5 may be provided. The same can be applied to a dressing wheel 7 provided with either a dressing wheel 5 or a truing wheel 6.
[0034]
The first driving means 9 for driving the dressing shaft 7 can be provided on the intermediate shaft 8 side which is movable in the axial direction, and can also be provided on the main body case 11 side. In this case, the drive source 17 of the first drive means 9 is fixed to the body case 11 side, and the drive shaft 18 and the dress shaft 7 are slid in the axial direction of the intermediate shaft 8 via an expansion joint, a slide joint, or the like. What is necessary is just to comprise so that a motion may be permitted.
[0035]
The linear bearing 10 for slidably guiding the intermediate shaft 8 in the axial direction is most preferably configured in a cylindrical shape as illustrated in the embodiment, but the linear bearing 10 parallel to the axial direction of the intermediate shaft 8 is the main body. A plurality of linear bearings 10 may be arranged on the inner peripheral side of the case 11 in the circumferential direction, and the intermediate shaft 8 may be slidably guided in the axial direction by the linear bearings 10. Even when the linear bearing 10 that holds the intermediate shaft 8 is used, the linear bearing 10 may be divided into a plurality of pieces in the circumferential direction of the intermediate shaft 8.
[0036]
There may be four or more inclination adjusting means 25. Further, the spherical washer 43 of the inclination adjusting means 25 may be integrated with the receiving body 42, or the receiving body 42 may be omitted when the spherical washer 43 is used. Further, the tilt adjusting means 25 may have another structure. However, it is desirable that the body case 11 can be fixed simultaneously with the tilt adjustment.
[0037]
The second driving means 12 may be one that does not use the rack gear 29, the worm gear 30, or the like, for example, one that uses a ball screw or the like. The rack gear 29 may be formed integrally with the outer peripheral surface of the intermediate shaft 8, or a separate structure may be attached to the outer peripheral surface of the intermediate shaft 8.
[0038]
【The invention's effect】
According to the present invention, the dressing shaft in which the dressing grindstone and / or the truing grindstone is mounted in the main body case supported by the machine frame via the tilt adjusting means, and arranged at a substantially right angle with the grindstone shaft, A dressing grindstone and / or a truing grindstone comprising an intermediate shaft that rotatably supports the dress shaft and a linear bearing that is held by the main body case and supports the intermediate shaft slidably in the axial direction. The first drive means is mounted on the intermediate shaft on the opposite side and rotationally drives the dress shaft, and is provided in the main body case between the machine frame and the first drive means, and the intermediate shaft can be moved and positioned in the axial direction. The inclination adjusting means has a spherical concave portion and a spherical convex portion that comes into surface contact with the spherical concave portion, and at least three of them are arranged substantially equally in the circumferential direction of the main body case . So the structure is It can be reduced in size, and after dressing and / or truing, the truing grindstone and / or dressing grindstone can be retracted to the machine frame side to secure space and improve workability. And / or has the advantage that sharpening can be done easily and reliably.
[0039]
Further, the intermediate shaft is formed in a cylindrical shape, the linear bearing is formed in a cylindrical shape, and the first drive means is mounted in series on the end of the intermediate shaft opposite to the truing grindstone and / or the dressing grindstone. Therefore, the overall diameter including the intermediate shaft, the linear bearing and the main body case can be reduced, and the structure on the first drive means side can be simplified even though the intermediate shaft slides in the axial direction.
[0040]
Moreover, since the second drive means includes a rack gear provided in the axial direction of the intermediate shaft, a gear meshing with the rack gear, and a drive source for driving the gear, the structure on the second drive means side. Can be easy.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a rotary dresser device showing an embodiment of the present invention.
FIG. 2 is a partially cutaway front view of a rotary dresser device showing an embodiment of the present invention.
3 is a cross-sectional view taken along line XX of FIG.
FIG. 4 is a longitudinal sectional view of an adjusting means showing an embodiment of the present invention.
FIG. 5 is a cross-sectional view of an inclination adjusting means showing an embodiment of the present invention.
[Explanation of symbols]
2 Wheel axis
5 Whetstone for dressing
6 Wheel for truing
7 Dress axis
8 Intermediate shaft
9 First drive means
10 Linear bearing
11 Body case
12 Second drive means
24 Buttocks
25 Tilt adjustment means
29 rack gears
30 worm gear

Claims (4)

A dressing wheel in which a dressing grindstone and / or a truing grindstone is mounted in a main body case supported via a tilt adjusting means on the machine frame, and a dress shaft that is disposed substantially at right angles to the grindstone shaft, and the dress shaft is rotatable. An intermediate shaft to be supported and a linear bearing which is held by the main body case and slidably supports the intermediate shaft in the axial direction thereof are provided substantially concentrically and opposite to the dressing grindstone and / or truing grindstone The first drive means mounted on the intermediate shaft and rotationally drives the dress shaft, and provided in the main body case between the machine frame and the first drive means, and moves the intermediate shaft in the axial direction. and a second driving means for enabling positioning, said inclination adjusting means has a spherical protrusion in surface contact with the spherical recess and the spherical concave portion, and at least 3 in a substantially equidistant in a circumferential direction of the main body case The rotary dresser unit for a planar grinding machine, characterized in that it is arranged.   The intermediate shaft is configured in a cylindrical shape, and the linear bearing is configured in a cylindrical shape. The rotary dresser device for a surface grinding machine according to claim 1, wherein the rotary dresser device is mounted.   The second drive means includes a rack gear provided in the axial direction of the intermediate shaft, a gear provided on the main body case side and meshing with the rack gear, and a drive source for rotationally driving the gear. The rotary dresser device for a surface grinder according to claim 1 or 2. The main body case has a substantially cylindrical shape, the first driving means is mounted in series on the end of the intermediate shaft, and the inner end of the main body case is opposite to the dressing grindstone and / or the truing grindstone. The rotary of a surface grinder according to any one of claims 1 to 3 , further comprising a gap into which the first driving means enters when the dressing grindstone and / or the truing grindstone corresponds to a grinding grindstone. Dresser device.

Images