JPH0565490U - Laser processing head - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent damage to the torch and body when the torch collides with a work. Reinstall the torch accurately and easily. [Structure] A mounting member 30 is fixed to a head body 40.
The torch 3 is swingably mounted on the mounting member 30 via the spherical bearing 10. The pin engaging portion 6 is fixedly attached to the torch 3. The pin mounting portion 32 is fixed to the mounting member 30 so as to face the pin engaging portion 6 with a gap G therebetween. Pin mounting part 3
2, the three magnet pins 20 are inserted into the gap G so that they can be attracted to the pin engagement portion 6 and only retracted from the gap G. [Effect] When the torch 3 collides with the work, the magnet pin 20 separates from the pin engaging portion 6, and the torch 3 swings with respect to the head body 40 in a manner to avoid an impact. When the magnet pin 20 is again attracted to the pin engaging portion 6, the torch 3 aligns with the head body 40.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a laser processing head that moves relative to a work.

[0002]

[Prior Art]

 FIG. 3 is a diagram showing a conventional laser processing head. In the conventional laser processing head 100, as shown in FIG. 3A, the torch 102 is connected to the main body 101 via the constriction member 103. Then, when an external force of a predetermined magnitude or more is applied to the torch 102, the constriction member 103 is broken and the torch 102 is detached from the main body 101. Alternatively, as shown in FIG. 3B, the torch 102 is connected to the main body 101 via the magnet 113, and when an external force of a predetermined magnitude or more acts on the torch 102, the torch 102 causes the main body 101 to move. I'm trying to get out of it. That is, as shown in FIG. 3A, during laser processing, the plate-shaped work 300 is horizontally placed on the table 200 via the plurality of blades 201. However, when the work 300 is cut into small pieces, the support of the sword mountain 201 is lost, one end falls into the gap between the sword mountains 201, 201, and the other end stands up. Then, when the torch 102 moves in the left-right direction in the drawing, it may collide with the workpiece 300 in the standing state. In such a case, the torch 102 is prevented from coming off the main body 101, thereby preventing the laser processing head 100 as a whole (main body 101) from being damaged.

[0003]

[Problems to be solved by the device]

 However, in this case, when the torch 102 comes off, the torch 102 is damaged or the lens attached to the torch 102 becomes dirty. Moreover, when reattaching the torch 102 to the main body 101, position adjustment and the like are complicated.

In view of the above-mentioned circumstances, the present invention can reduce damage at the time of a collision with a work or the like, or can perform a position adjustment at the time of re-installation after the collision accurately and easily. An object is to provide a processing head.

[0005]

[Means for Solving the Problems]

 According to the present invention, the main body (30, 40) is provided so as to be movable relative to the work, and the torch (3) can be rocked without being separated from the main body (30, 40). The swing restraint means (20, 25) is provided between the main body (30, 40) and the torch (3) so as to swing the torch (3). And to release the vibration of the torch (3) when an external force of a predetermined magnitude acts.

In the present invention, the main body (30, 40) is provided with a first engaging portion (32), and the torch (3) is provided with a second engaging portion (6). A gap (G) is formed between the first engaging member (32) and the gap (G) is enlarged or reduced by the swing of the torch (3). The plurality of positioning pins (20, 25) are provided as opposed to the joint portion (32) and serve as the rocking restraint means, and the first engagement portion (32) is configured to hold the gap (G) constant. ) Is connected to the second engaging portion (6), and the connection can be released when an external force of a predetermined magnitude acts.

It should be noted that the numbers in parentheses and the like indicate the corresponding elements in the drawings for the sake of convenience, and thus the present description is not limited to the description in the drawings. The same applies to the column of "action" below.

[0008]

[Action]

 With the above configuration, the torch (3) is normally fixed to the main body (30, 40), and when it collides with a work or the like, the torch (3) does not fall off the main body (30, 40) and avoids an impact. It acts to rock in a shape.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. 1 is a sectional view showing an embodiment of a laser processing head according to the present invention, and FIG. 2 is a sectional view showing a modification of a positioning pin of the laser processing head shown in FIG.

As shown in FIG. 1, the laser processing head 1 has a head main body 40. The head main body 40 is relative to a work (not shown) on a table, and the upper, lower, left and right sides in the figure. It is provided so as to be movable and driven in any direction. An optical path 41 for laser light is provided through the center of the head body 40, and the optical path 41 extends to a laser oscillator (not shown). A mounting member 30 is mounted below the head body 40 in the figure, and an optical path 31 for laser light is formed through the mounting member 30 at the center thereof. Further, the mounting member 30 is fixed to the head body 40 via a fixing screw 39 in a state where the optical path 31 is aligned with the optical path 41.

A torch 3 is mounted below the mounting member 30 in the figure, and an optical path 4 of laser light is formed through the center of the torch 3, and a lens 4 a and the like are provided in the optical path 4. It is worn. Further, when the external force acting on the tip 5 with respect to the attachment member 30 is equal to or larger than a predetermined magnitude with respect to the attachment member 30, the torch 3 swings (rotates) about the point O and the external force is predetermined. When the size is equal to or smaller than the size, the optical path 4 is fixed in a state of being aligned with the optical path 31, and is connected to the head body 40 via the spherical bearing 10 and the magnet pin 20.

That is, the connecting portion 7 is formed in a concave shape in a cylindrical shape at the upper center portion of the torch 3 in the figure. Further, a connecting portion 35 is provided at the lower central portion of the mounting member 30 in the figure so as to project in a cylindrical shape having an outer diameter smaller than the inner diameter of the connecting portion 7 of the torch 3. The connecting portion 35 of the mounting member 30 is inserted into the connecting portion 7 of the torch 3, and the spherical bearing 10 rotates the connecting portion 7 and the connecting portion 35 between the connecting portion 7 and the connecting portion 35. It is provided so that it can be connected. That is, the spherical bearing 10 is provided with the outer sphere member 11 and the inner sphere member 12 in such a manner that the inner sphere surface 11a and the outer sphere surface 12a are slidable and rotatable about the point O. The outer sphere member 11 and the inner sphere member 12 are arranged such that the point O is located on the axial center CT of the optical path 4 and on the axial center CH of the optical path 31, respectively. It is fixed to the connecting portion 35.

In addition, a pin engaging portion 6 is fixedly provided in a cylindrical shape on the upper outer peripheral portion of the torch 3 in the figure. At the upper end of the pin engaging portion 6 in the drawing, a reference plane B1 is formed in an annular shape centering on the axial center CT of the optical path 4 and perpendicular to the axial center CT of the optical path 4.

A pin mounting portion 32 is fixed to the upper outer peripheral portion of the mounting member 30 in the drawing in the form of a flange having an outer diameter substantially the same as the outer diameter of the pin engaging portion 6. Three pin mounting holes 32a are formed in the pin mounting portion 32 in the vertical direction in the drawing. The pin mounting holes 32a are arranged symmetrically (equal distance, equal angular interval) about the axis CH of the optical path 31, and are formed in a cylindrical shape parallel to the axis CH. Further, a flange 32b is provided so as to project inside the lower end of the pin mounting hole 32a in the figure, and a reference plane B2 is provided at an upper part of the collar 32b in the figure so as to be perpendicular to the axis CH of the optical path 31. Has been formed.

The pin engaging portion 6 of the torch 3 and the pin mounting portion 32 of the mounting member 30 are arranged so as to face each other with a gap G therebetween. Since the pin engaging portion 6 is fixed to the torch 3 and the pin mounting portion 32 is fixed to the mounting member 30, when the torch 3 swings with respect to the mounting member 30, the pin engaging portion 6 and The gap G between the pin mounting portions 32 is enlarged or reduced. When the external force acting on the torch 3 is equal to or smaller than a predetermined value, all the three magnet pins 20 between the pin engaging portion 6 and the pin mounting portion 32 are centered on the axis CH. With the gap G kept constant at the angular position, that is, the reference plane B1 of the torch 3 and the reference plane B2 of the mounting member 30 become parallel, and the axis CT of the optical path 4 becomes the axis CH of the optical paths 31 and 41. In the aligned state, the pin engaging portion 6 and the pin mounting portion 32 are connected and fixed, and when the external force acting on the torch 3 is a predetermined magnitude or more, the pin engaging portion 6 and the pin mounting portion 32 are It is provided so as to release the connection.

That is, the magnet pin 20 is formed with an outer diameter smaller than the inner diameter of the pin mounting hole 32a, and a flange 20b is provided on the outer side of the upper end of the magnet pin 20 in the figure. The magnet pin 20 is inserted into the pin mounting hole 32a of the pin mounting portion 32 from above in the drawing with the flange 20b in contact with the flange 32b and completely protruding downward in the drawing. That is, the magnet pin 20 is inserted into each pin mounting hole 32a of the pin mounting portion 32 so as to be only retractable from the gap G side. Further, the length L from the bottom surface 20a of the magnet pin 20 to the collar 20b is determined by the reference plane B1 of the torch 3 and the mounting member 30 when the axial center CT of the optical path 4 is aligned with the axial center CH of the optical paths 31 and 41. Is formed to have the same distance as the reference plane B2. The bottom surface 20a of the magnet pin 20 is attracted to the pin engaging portion 6 of the torch 3 via the attraction force of a magnet having a predetermined size.

In addition, the swing detection sensor 22 (a known non-contact sensor or the like) is attached to the flange 32b of each pin mounting hole 32a of the pin mounting portion 32, and the flange 32b and the flange 20b of the magnet pin 20 come into contact with each other. The swing detection sensor 22 is provided so as to detect whether or not it is in contact, and is electrically connected to the control device of the head body 40.

Since the laser processing head 1 has the above-described configuration, when an external force acts on the tip portion 5 of the torch 3 in the left-right direction in FIG. 1 or in the direction perpendicular to the plane of FIG. On the other hand, a tensile force acts between one or two magnet pins 20 (hereinafter referred to as magnet pins 20T) arranged on the side receiving the external force and the pin engaging portion 6. At the same time, a compressive force acts between the pin engaging portion 6 and the other two or one magnet pins 20 (hereinafter, referred to as magnet pins 20C) arranged on the opposite side to the axis CH. ..

At this time, if the external force acting on the torch 3 is equal to or less than a predetermined value, such as when the hand is touched during setup, and the tensile force between the magnet pin 20T and the pin engaging portion 6 is small, The attracted state of the magnet between the gnet pin 20T and the pin engaging portion 6 is maintained. Then, the torch 3 is held in a fixed state with respect to the head body 40 and the mounting member 30, and the axial center CT of the optical path 4 of the torch 3 and the axial center CH of the optical path 41 of the head main body 40 are aligned. Is retained.

Further, when the laser processing head 1 (head body 40) is moved in the left-right direction in FIG. 1 or in the direction perpendicular to the plane of FIG. 1, the torch 3 collides with the work, such as the tip portion 5 of the torch 3. When the external force acting on the magnet is a predetermined magnitude or more and the tensile force between the magnet pin 20T and the pin engaging portion 6 is large, the magnet pin 20T and the pin engaging portion 6 resist the attraction force by the magnet. And are separated. Then, the torch 3 expands the gap G between the pin attachment portion 32 and the pin engagement portion 6 where the magnet pin 20T is arranged, and the pin attachment portion 32 and the pin where the magnet pin 20C is arranged. In a form of reducing the gap G of the engaging portion 6, the head body 40 and the mounting member 30 are swung (rotated) about the point O to the side opposite to the side receiving the external force.

When the torch 3 swings with respect to the head body 40, the magnet pin 20 C is pushed upward by the pin engaging portion 6 in the figure. Then, the swing detection sensor 22 detects that the magnet pin 20C has moved, that is, that the collar 20b of the magnet pin 20C has separated from the collar 32b of the pin mounting portion 32. Then, a predetermined signal is transmitted from the swing detection sensor 22 to the control device of the head body 40, and the movement of the head body 40 is immediately stopped.

That is, when the torch 3 collides with a work or the like, the movement of the head body 40 is stopped, and the torch 3 is swung with respect to the head body 40 so as to avoid an impact, thereby damaging the head body 40. This can be suitably prevented. At this time, since the torch 3 only swings with respect to the head body 40 and does not fall off from the head body 40 as in the conventional case, damage to the torch 3 and contamination of the lens 4a can be prevented.

When reattaching the torch 3 to the head body 40, the torch 3 is appropriately swung with respect to the head body 40 around the point O, and all the pin engaging portions 6 are moved. The bottom portion 20a of the (three) magnet pins 20 is attracted. Then, the reference surface B2 of the pin mounting portion 32 and the reference surface B1 of the pin engaging portion 6 become parallel to each other, so that the axial center CT of the optical path 4 of the torch 3 and the axial center CH of the optical path 41 of the head body 40 can be aligned. I can. That is, the position adjustment of the torch 3 with respect to the head body 40 can be accurately and easily performed only by adhering the pin engaging portion 6 to the magnet pin 20. When the torch 3 is reattached, the bottom portion 20a of the magnet pin 20 projects toward the gap G side (the pin engaging portion 6 side) due to the weight of the magnet pin 20 itself, but the magnet pin 20 is inserted through a spring or the like. You may make it press down in the figure.

In the above-mentioned embodiment, the case where the magnet pin 20 is used as the positioning pin for connecting the pin engaging portion 6 of the torch 3 and the pin mounting portion 32 of the mounting member 30 has been described. The positioning pin connects the pin engaging portion 6 and the pin mounting portion 32 in a manner to keep the gap G constant when the external force acting on the torch 3 is less than a predetermined magnitude, and the external force acting on the torch 3 is predetermined. If the size is larger than that, it suffices to be able to release the connection between the pin engaging portion 6 and the pin mounting portion 32, and a positioning pin other than the magnet pin 20 can be used.

For example, instead of the magnet pin 20 described above, a shear pin 25 may be used as shown in FIG. That is, like the magnet pin 20, the shear pin 25 is formed to have an outer diameter smaller than the inner diameter of the pin mounting hole 32a, and a collar 25b is provided on the outside of the upper end of the shear pin 25 in the figure. The shear pin 25 is inserted into the pin mounting hole 32a of the pin mounting portion 32 from above in the figure with the collar 25b abutting against the collar 32b and completely protruding downward in the figure. That is, the shear pin 25 is inserted into each pin mounting hole 32a of the pin mounting portion 32 so that it can only be retracted from the gap G side. Further, the bottom portion 25 a of the shear pin 25 is fixed to the pin engaging portion 6 via a fixing screw 26. The length L from the reference surface B1 of the pin engaging portion 6 to the collar 25b of the shear pin 25 is the reference of the torch 3 when the axial center CT of the optical path 4 is aligned with the axial centers CH of the optical paths 31 and 41. The distance is the same as the distance between the surface B1 and the reference surface B2 of the mounting member 30. Further, a constricted portion 25c is formed in an intermediate portion of the shear pin 25 so as to be broken when a predetermined amount of tensile force is applied.

Therefore, when the shear pin 25 is used instead of the magnet pin 20, when the torch 3 collides with the work during machining, one or two shear pins 25 arranged on the colliding side are bound together. By breaking at the portion 25c, the torch 3 can be swung with respect to the head body 40 while avoiding an impact. At the same time, it is possible to immediately stop the movement of the head main body 40 by detecting the movement of the two or one shear pins 25 arranged on the opposite side via the swing detection sensor 22. .. Then, when reattaching the torch 3 to the head body 40, the position adjustment of the torch 3 with respect to the head body 40 can be accurately and easily performed by replacing the broken one or two shear pins 25 with new ones. You can do it.

In the above-described embodiment, the positioning pins such as the magnet pin 20 and the shear pin 25 are described as the swing restraint means for restraining the swing of the torch 3 with respect to the head body 40. When the external force acting on the torch 3 is a predetermined magnitude or less, the swing of the torch 3 with respect to the head body 40 is restrained, and when the external force acting on the torch 3 is a predetermined magnitude or more, the head body of the torch 3 is It is only necessary to be able to release the swinging motion with respect to 40, and the positioning pin is not necessarily required.

[0028]

As described above, according to the present invention, the main body such as the mounting member 30 and the head main body 40 is provided so as to be movable relative to the work, and the torch 3 is attached to the main body. The magnet pin 20, the shear pin 25, and the like are provided between the main body and the torch 3 so that they can be rocked without being separated from each other (via the spherical bearing 10 and the like). Since the dynamic restraint means restrains the swing of the torch 3 and releases the swing of the torch 3 when an external force of a predetermined magnitude acts, the dynamic restraint means is provided. By restraining the torch 3, the torch 3 can be fixed in an aligned state with respect to the main body. When an external force of a predetermined magnitude or more acts, the torch 3 is released and the torch 3 is pulled by the external force. To the body in a way that avoids Can be rocked. Therefore, when the torch 3 collides with the work, the torch 3 swings so as to avoid an impact, so that damage to the main body can be prevented, and at this time, the torch 3 does not drop from the main body. It is also possible to prevent damage caused by dropping the torch 3.

In the present invention, the main body is provided with a first engaging portion such as the pin mounting portion 32, and the torch 3 is provided with the second engaging portion such as the pin engaging portion 6. A gap G is formed between the first engagement portion and the first engagement portion so that the gap G is enlarged or reduced by the swing of the torch 3. As the rocking restraint means, a plurality of positioning pins such as magnet pins 20, shear pins 25, etc. are provided so that the gap G is held constant and the first engaging portion and the second engaging portion are provided. Is connected to the first engaging portion and the second engaging portion via the positioning pin, because the connection is released when the external force of a predetermined magnitude is applied. By doing so, the torch 3 can be fixed in a state of being aligned with the main body, and an external force of a predetermined magnitude or more can be fixed. When actuated, the torch 3 can be swung with respect to the main body in a form of avoiding an external force by releasing the connection between the first engaging portion and the second engaging portion. Therefore, when the torch 3 collides with the work, the torch 3 swings so as to avoid an impact, so that damage to the main body can be prevented. At this time, the torch 3 does not fall off the main body, so the torch 3 does not fall off. It is also possible to prevent damage caused by the drop of 3 or the like. Further, when reattaching the torch 3 to the main body, the position adjustment of the torch 3 with respect to the main body is performed only by connecting the first engaging portion and the second engaging portion via the positioning pin. Position adjustment can be performed accurately and easily.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a laser processing head according to the present invention.

FIG. 2 is a cross-sectional view showing a modified example of a positioning pin of the laser processing head shown in FIG.

FIG. 3 is a diagram showing a conventional laser processing head.

[Explanation of symbols]

1 ... Laser processing head 3 ... Torch 6 ... 2nd engaging part (pin engaging part) 20 ... Oscillation restraint means, positioning pin (magnet pin) 25 ... Oscillation restraint means, positioning pin ( Share pin 30 ... Main body (mounting member) 32 ... First engaging portion (pin mounting portion) 40 ... Main body (head main body) G ... Gap

Claims (2)

[Scope of utility model registration request] 1. A main body is provided so as to be movable and driven relative to a work, and a torch is connected to the main body so as to be swingable without being separated from the main body. And a torch, and a swinging restraining means is provided to restrain swinging of the torch and to release swinging of the torch when an external force of a predetermined magnitude acts. 2. A first engaging portion is provided on the main body, a gap is formed between the second engaging portion and the first engaging portion on the torch, and the gap is formed. Is provided so as to be enlarged or reduced by the swinging of the torch so as to face the first engaging portion, and as the swing restraining means, a plurality of positioning pins are formed so as to keep the gap constant. The first engaging portion and the second
The laser processing head according to claim 1, wherein the engaging portion is connected and the connection is released when an external force of a predetermined magnitude is applied.