JP2023075169A - Laser processing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a laser processing device that facilitates a replacement operation of an expander in a state of facing a first mirror.

SOLUTION: A laser processing device 1 includes an expander 30 that is fixed to a laser oscillation unit 12 by a screw 34 threadedly engaging with a hexagonal hole from a front direction D1 and that emits a laser beam R incident from the laser oscillation unit 12 in the front direction D1, a first mirror 56 that faces the expander 30 in the front direction D1 and reflects the laser beam R incident from the expander 30 in a downward direction D2, and a second mirror 58 that faces the first mirror 56 in the downward direction D2 and reflects the laser beam R incident from the first mirror 56 in a left direction D3 located in a twisted position from the front direction D1. At least one bolt 34 with the hexagonal hole is such that a first imaginary columnar area V1, which is an extension of a head part surface of the first bolt 34 with the hexagonal hole in the front direction D1, does not overlap with the first mirror 56.

SELECTED DRAWING: Figure 2

COPYRIGHT: (C)2023,JPO&INPIT

Description

The present disclosure relates to a laser processing apparatus having an expander on which laser light from a laser oscillation unit is incident.

Conventionally, various techniques have been proposed for the above laser processing apparatus. For example, the technique described in Patent Document 1 below includes a laser oscillator that emits laser light, a beam expander that expands the beam diameter of the laser light emitted from the laser oscillator, and the laser light that has passed through the beam expander. and a converging lens that converges the laser beam from the galvanometer scanner, wherein the beam expander is the light exit port of the laser oscillator. a laser light source unit integrally assembled on the side surface; and a scanner unit configured by housing the galvanometer scanner in a housing and having an opening at a portion of the housing facing the beam expander. wherein the laser light source unit is detachably attached to the housing of the scanner unit.

JP 2012-222242 A

A mirror separate from the galvano-scanner may be required for directing the laser beam emitted from the beam expander to the galvano-scanner depending on the positional relationship of each member constituting the laser processing apparatus. In such a case, if the beam expander is replaced while the separate mirror is arranged to face the beam expander, the separation between the separate mirror and the attachment point of the beam expander to the laser oscillator will occur. Depending on the positional relationship, the separate mirrors may interfere with the replacement work of the beam expander.

Therefore, the present disclosure has been made in view of the above-described points, and provides a laser processing apparatus excellent in workability for exchanging an expander facing the first mirror.

This specification includes a laser oscillation unit that oscillates a laser beam, and an expander that is fixed by a first screw that is screwed into the laser oscillation unit from a first direction and that emits a laser beam incident from the laser oscillation unit in the first direction. and a first mirror facing the expander in the first direction and reflecting the laser light incident from the expander in the second direction, and the laser light incident from the first mirror facing the first mirror in the second direction. in a third direction that is twisted from the first direction; No. 1 screw discloses a laser processing apparatus characterized in that a first virtual columnar region obtained by extending the head surface of the first screw in the first direction does not overlap with the first mirror.

According to the present disclosure, the laser processing apparatus is excellent in workability for exchanging the expander facing the first mirror.

FIG. 3 is a perspective view showing the laser processing device with the housing cover removed; It is the perspective view which the same laser processing apparatus was represented in the state which removed the inner cover. It is the side view in which the same laser processing apparatus was represented. It is the front view in which the same laser processing apparatus was represented. It is the perspective view which the same laser processing apparatus was represented in the state which removed the galvanometer scanner. It is the side view in which the same laser processing apparatus was represented. It is the front view in which the same laser processing apparatus was represented. It is the figure by which the base of a laser processing apparatus, an inner cover, a galvano scanner, a galvano board, and wiring were represented typically. It is the perspective view in which the inner cover of the laser processing apparatus was represented. FIG. 4 is a schematic diagram of a laser oscillation unit, an expander, and an inner cover of the laser processing apparatus; FIG. 4 is a schematic diagram of a laser oscillation unit, an expander, and an inner cover of the laser processing apparatus; FIG. 3 is a rear view of the laser processing device with the housing cover removed; It is the front view in which the example of a change of the pedestal member of the laser processing apparatus was represented. It is the front view in which the example of a change of the pedestal member of the laser processing apparatus was represented. It is the perspective view in which the example of a change of the inner cover of the laser processing apparatus was represented.

Hereinafter, a laser processing apparatus of the present disclosure will be described based on specific embodiments with reference to the drawings. In each drawing used for the following description, a part of the basic configuration is omitted, and the dimensional ratios and the like of each part drawn are not necessarily accurate. In the following description, the front-back direction, the up-down direction, and the left-right direction are as shown in each drawing.

As shown in FIG. 1, the laser processing apparatus 1 of this embodiment includes a base 10. As shown in FIG.
A laser oscillation unit 12, an inner cover 14, a main board (not shown) fixed to a bracket 16, a galvanometer board 18, a frame 20, a rear board 22, and a power supply unit (hereinafter referred to as "PSU") are mounted on the base 10. ) 24 and the like are provided.

The laser oscillation unit 12, the main board, the galvano board 18, the frame 20, the rear board 22, the PSU 24, and the like are assembled on the base 10 with hexagon socket screws 26, mounting screws 28, and the like.

The main board and the rear board 22 are boards for controlling the laser processing apparatus 1 .
The galvano board 18 is a board for controlling a galvano scanner (reference numeral 70 in FIG. 2), which will be described later. A rear substrate 22 is fixed to the top of the frame 20 . An exhaust fan (not shown) is provided inside the frame 20 . Further, the frame 20 is provided with a communication connection port 202, a PC connection port 204, an AC inlet 206, a turnkey 208 that is a power switch, a cable tie 210, and the like. do. The PSU 24 supplies power to the laser processing device 1 .

The inner cover 14 includes, on the base 10, a tip portion of an expander (reference numeral 30 in FIG. 2), a pedestal member (reference numeral 50 in FIG. 2), a galvanometer scanner (reference numeral 70 in FIG. 2), and an fθ lens ( It surrounds reference numeral 80) in FIG. The inner cover 14 has a substantially rectangular parallelepiped shape with an open lower surface, and has a partition wall 82, a notch 84 (see FIGS. 8 and 9), a right extending portion 86, a left extending portion 88, and the like. The partition wall 82 constitutes the rear surface of the inner cover 14 . The notch 84 is an opening formed by bending a portion of the lower left side of the partition 82 outward. A detailed description of the partition wall 82 and the notch 84 will be given later.

The right extending portion 86 extends rightward along the base 10 from the lower side of the right surface of the inner cover 14 . A pair of fixing holes 87 are provided in the right extending portion 86 . The left extending portion 88 extends leftward along the base 10 from the lower side of the left surface of the inner cover 14 . A pair of fastening slits 90 are provided in the left extending portion 88 . In each fixing hole 87 and each fastening slit 90 , a hexagon socket head screw (reference numeral 94 in FIG. 9 ), which will be described later, is screwed into the base 10 while passing through each fixing hole 87 and each fastening slit 90 . Thereby, the inner cover 14 is fixed to the base 10 while being placed on the base 10 . A detailed description of each fastening slit 90 will be given later.

A housing cover (not shown) is attached to the base 10 and the frame 20 by mounting screws (not shown) of the same type as the mounting screws 28 . The laser oscillation unit 12, the inner cover 14, the main board, the galvano board 18, the frame 20, the rear board 22, the PSU 24, and the like are covered on the base 10 by the housing cover described above.

2 to 4 show the laser processing apparatus 1 with the inner cover 14 removed from the base 10. FIG. Reference numeral 11 denotes a screw hole provided on the base 10, into which the above-described hexagonal socket screw (reference numeral 94 in FIG. 9), that is, a screw for fixing the inner cover 14 to the base 10 is screwed. is a hole. Further, reference numeral 212 is a binding band provided on the frame 20 .

The laser oscillation unit 12 oscillates a laser beam R and is composed of a CO2 laser, a YAG laser, or the like housed in a substantially rectangular parallelepiped case. An expander 30 protrudes from the front surface of the laser oscillation unit 12 . The expander 30 adjusts the diameter of the laser beam R incident from the CO2 laser, YAG laser, or the like, and emits the adjusted laser beam R in the forward direction D1.

The expander 30 has a substantially cylindrical shape, and a fixing flange 32 extending outward along the front surface of the laser oscillation unit 12 is integrally provided at its circular rear end. In the fixing flange 32, three hexagon socket screws 34 arranged at equal pitches in the circumferential direction are screwed into the front surface of the laser oscillation unit 12 while passing through the fixing flange 32 from the forward direction D1. ing. The expander 30 is thereby fixed to the laser oscillation unit 12 . A side surface of the expander 30 is integrally provided with an intermediate flange 36 extending outward along the circumferential direction. Of the three hexagon socket screws 34 for fixing the expander 30 to the laser oscillation unit 12, the leftmost hexagon socket screw 34 and the rightmost hexagon socket screw 34 are arranged in the horizontal direction. are arranged side by side.

A pedestal member 50 is provided on the base 10 on the front direction D1 side of the expander 30 . The pedestal member 50 has a pedestal main body 52, a fixing portion 54, a first mirror 56, a second mirror 58, and the like. The pedestal main body 52 has a substantially flat plate shape elongated in the vertical direction, and is erected on the base 10 along the vertical direction.

At the upper end of the pedestal main body 52, a first mirror 56 is rotatably provided at a position facing the expander 30 in the forward direction D1 by a rotating mechanism 60. As shown in FIG. The rotating mechanism 60 is composed of a horizontally parallel rotating bolt 61 and the like, which is inserted through the pedestal main body 52 and the first mirror 56 in parallel with the left direction D3. That is, the first mirror 56 is positioned facing the expander 30 in the front direction D1 by the rotation bolt 61 of the rotation mechanism 60, and can be rotated with the left direction D3 as the rotation axis. .

The first mirror 56 has a mirror surface portion 57 that reflects the laser beam R. As shown in FIG. The first mirror 56 is attached to the upper end of the pedestal main body 52 by a rotating bolt 61 of a rotating mechanism 60 so that the mirror surface portion 57 reflects the laser beam R from the expander 30 in the downward direction D2. Fixed.

A second mirror 58 is attached to the lower end of the pedestal body 52 while being mounted on the base 10 at a position facing the first mirror 56 in the downward direction D2. The second mirror 58 has a mirror surface portion 59 that reflects the laser beam R. As shown in FIG. The mirror surface portion 59 is inclined in the downward direction D2 as it extends in the leftward direction D3. As a result, the mirror surface portion 59 of the second mirror 58 reflects the laser beam R from the first mirror 56 in the left direction D3 at a position twisted with respect to the forward direction D1. The mirror surface area of the mirror surface portion 59 of the second mirror 58 is larger than the mirror surface area of the mirror surface portion 57 of the first mirror 56 .

Further, a fixing portion 54 extending in the front-rear direction protrudes from the lower end portion of the pedestal main body 52 while being placed on the base 10 . In the fixed portion 54 , a pair of hexagon socket screws (reference numeral 63 in FIG. 6 ), which will be described later, are screwed into the base 10 while passing through the fixed portion 54 . Thereby, the pedestal member 50 is fixed to the base 10 .

A galvanometer scanner 70 is provided on the base 10 on the side of the pedestal member 50 in the left direction D3. The galvanometer scanner 70 has an X-axis galvanometer mirror 72, a Y-axis galvanometer mirror 74, a galvanometer X-axis motor 76, a galvanometer Y-axis motor 78, and the like. The X-axis galvanomirror 72 reflects the laser light R from the second mirror 58 to the Y-axis galvanomirror 74 . The Y-axis galvanomirror 74 reflects the laser beam R from the X-axis galvanomirror 72 to the fθ lens 80, which will be described later.

The galvano X-axis motor 76 and the galvano Y-axis motor 78 are mounted in the galvano scanner 70 so that their respective motor shafts are orthogonal to each other, and the X-axis galvano mirror 72 and the Y-axis galvano mirror 72 are mounted at the tip of each motor shaft. Mirrors 74 face each other on the inside. The galvano X-axis motor 76 and the galvano Y-axis motor 78 are connected to the galvano board 18 by wiring (reference numeral 19 in FIG. 8), which will be described later. As a result, the galvano X-axis motor 76 and the galvano Y-axis motor 78 rotate the X-axis galvano mirror 72 and the Y-axis galvano mirror 74 by controlling the rotation of the galvano substrate 18, and scan the laser light R two-dimensionally.

An fθ lens 80 is fitted in a through hole of the base 10 below the Y-axis galvanomirror 74 . The f.theta.

Therefore, in the laser processing apparatus 1, the laser beam R oscillated by the laser oscillation unit 12 is reflected by the expander 30, the first mirror 56, the second mirror 58, the X-axis galvanometer mirror 72, the Y-axis galvanometer mirror 74, and the fθ lens 80. , the workpiece W is two-dimensionally scanned. As a result, the workpiece W is marked (printed) with an image such as a character or a figure.

The first virtual columnar region V1 shown in FIG. 2 is the head of the lowermost hexagon socket screw 34 among the three hexagon socket screws 34 for fixing the expander 30 to the laser oscillation unit 12. The part surface is extended in the front direction D1. The lowermost hexagon socket head screw 34 is attached to the fixing flange 32 of the expander 30 so as to reflect the laser beam R from the expander 30 in the downward direction D2. One virtual columnar area V1 is arranged at a position not overlapping.

5 to 7 show the laser processing apparatus 1 with the inner cover 14 and the galvanometer scanner 70 removed from the base 10. FIG. As shown in FIG. 6, in the laser processing apparatus 1, the optical path length L1 of the laser light R between the expander 30 and the mirror surface portion 57 of the first mirror 56 in the forward direction D1 is The pedestal member 50 is arranged so as to be shorter than the optical path length L2 of the laser beam R between the mirror surface portion 57 of the first mirror 56 and the mirror surface portion 59 of the second mirror 58 .

The second virtual columnar region V2 shown in FIGS. 5 and 6 defines the head surface of each hexagon socket screw 63 for fixing the pedestal member 50 to the base 10. (vertical direction). Each hexagon socket head screw 63 is arranged in the fixing portion 54 of the pedestal member 50 at a position where the second virtual pillar region V2 does not overlap the pedestal main body 52 of the pedestal member 50 .

As shown in FIG. 8 , when the inner cover 14 is fixed on the base 10 while surrounding the galvano scanner 70 and the like, the partition wall 82 forming the rear surface of the inner cover 14 separates the galvano scanner 70 and the galvano substrate 18 from each other. is placed between Thereby, the partition wall 82 blocks the space between the galvano scanner 70 and the galvano substrate 18 .

Furthermore, the wiring 19 that connects the galvano scanner 70 and the galvano substrate 18 is passed through the notch 84 of the partition 82 . A part of the wiring 19 is wrapped with a cushioning material 15 . The cushioning material 15 is in a state of being loaded into the notch 84 on the base 10 . That is, the cushioning material 15 is arranged between the wiring 19 and the notch 84 . The cushioning material 15 may be provided as a covering material for the wiring 19 . Note that the wiring 19 is omitted in FIGS. 1 to 7 described above.

As shown in FIG. 9, each fastening slit 90 provided in the left extending portion 88 of the inner cover 14 is passed with a hexagon socket head screw 94 from above. Each fastening slit 90 is provided along the horizontal direction, which is the direction in which the partition wall 82 extends. The width 92 of each fastening slit 90 is smaller than the diameter 97 of the head 96 of the hexagon socket screw 94 but larger than the diameter 99 of the shaft portion 98 of the hexagon socket screw 94 . Therefore, the shaft portion 98 of the hexagon socket head screw 94 is passed through each fastening slit 90 with a gap therebetween. On the other hand, the head 96 of the hexagon socket head screw 94 cannot pass through each fastening slit 90 and contacts the left extension 88 .

In addition, the partition wall 82 is provided on its right side with an insertion hole 100 into which the tip portion of the expander 30 is inserted. Therefore, the diameter 102 of the insertion hole 100 is made larger than the diameter 38 of the expander 30 but smaller than the diameter 40 of the intermediate flange 36 of the expander 30, as shown in FIG. Therefore, as shown in FIG. 11 , the intermediate flange 36 of the expander 30 contacts the partition wall 82 when the tip portion of the expander 30 is inserted into the insertion hole 100 of the partition wall 82 .

As shown in FIG. 12, on the back of the frame 20, in addition to the communication connection port 202, the PC connection port 204, the AC inlet 206, the turnkey 208, and the binding bands 210 and 212, an exhaust port A mouth 200 is provided. The exhaust port 200 is arranged behind the above-described exhaust fan (not shown). Above the exhaust port 200, a communication connection port 202 and a PC connection port 204 are arranged side by side in the horizontal direction. An AC inlet 206 and a turnkey 208 are arranged vertically on the left side of the exhaust port 200 .

The binding band 210 is arranged between the PC connection port 204 and the exhaust port 200 on the diagonal upper right side of the exhaust port 200 . As a result, wiring (not shown) extending from the communication connection port 202 or the PC connection port 204 can be bundled with the binding band 210 so as not to hang down to the outside of the exhaust port 200. . The binding band 212 is arranged between the AC inlet 206 and the exhaust port 200 on the diagonally lower left side of the exhaust port 200 . As a result, the power cord (not shown) extending from the AC inlet 206 can be bundled with the binding band 212 so as not to hang down to the outside of the exhaust port 200 . In this manner, each binding band 210, 212 ensures the performance of the exhaust fan (not shown) described above.

As described above in detail, in the laser processing apparatus 1 of the present embodiment, among the three hexagon socket screws 34 for fixing the expander 30 to the laser oscillation unit 12, the lowermost hexagon socket A first virtual columnar region V1 obtained by extending the head surface of the attachment screw 34 in the forward direction D1 does not overlap the first mirror 56 facing the expander 30 in the forward direction D1. Therefore, the operator can easily hang a hexagonal wrench (not shown) or the like from the forward direction D1 on the head surface of the hexagonal socket head screw 34 located on the lowest side. Therefore, the laser processing apparatus 1 of the present embodiment is excellent in workability for exchanging the expander 30 facing the first mirror 56 .

Further, in the laser processing apparatus 1 of the present embodiment, the optical path length L1 of the laser light R between the expander 30 and the mirror surface portion 57 of the first mirror 56 in the forward direction D1 is the first length in the downward direction D2. It is shorter than the optical path length L2 of the laser beam R between the mirror surface portion 57 of the mirror 56 and the mirror surface portion 59 of the second mirror 58 . Therefore, the deviation amount of the optical path of the laser beam R between the expander 30 and the mirror surface portion 57 of the first mirror 56 is the laser beam between the mirror surface portion 57 of the first mirror 56 and the mirror surface portion 59 of the second mirror 58 The amount of deviation of the optical path of the light R is suppressed to be smaller. Thereby, the mirror area of the mirror surface portion 57 of the first mirror 56 can be made smaller than the mirror surface area of the mirror surface portion 59 of the second mirror 58 . As a result, it is easier to prevent the first mirror 56 from overlapping the first virtual columnar region V1.

In other words, the mirror surface area of the mirror surface portion 57 of the first mirror 56 is smaller than that of the mirror surface portion 59 of the second mirror 58 . Therefore, the operator can easily use a hexagon wrench (not shown) or the like to attach the three hexagon socket screws 34 for fixing the expander 30 to the laser oscillation unit 12 .

Further, in the laser processing apparatus 1 of the present embodiment, the partition wall 82 of the inner cover 14 surrounding the first mirror 56, the second mirror 58, and the X-axis galvanometer mirror 72 and the Y-axis galvanometer mirror 74 of the galvanometer scanner 70 is By being arranged between the galvano scanner 70 and the galvano board 18 , the space between the galvano scanner 70 and the galvano board 18 is blocked. Therefore, the laser beam R two-dimensionally scanned by the galvanometer scanner 70 becomes stray light that is unnecessary for marking (printing) processing, and is blocked by the partition wall 82 toward the galvano substrate 18. Damage to the galvano substrate 18 is suppressed.

Further, in the laser processing apparatus 1 of the present embodiment, the cushioning material 15 wound around a part of the wiring 19 connecting the galvanometer scanner 70 and the galvano substrate 18 is placed between the wiring 19 and the notch 84 of the partition wall 82 . loaded in the Therefore, since the gap between the wiring 19 and the notch 84 of the partition wall 82 is sealed, stray light unnecessary for the marking (printing) process described above does not reach the galvano substrate 18, and damage to the galvano substrate 18 is suppressed. be done. In addition, entry of dust or the like into the inner cover 14 is suppressed.

Further, in the laser processing apparatus 1 of the present embodiment, the partition wall 82 of the inner cover 14 is provided with an insertion hole 100 into which the tip portion of the expander 30 is inserted. Diameter 102 of bayonet 100 is greater than diameter 38 of expander 30 and less than diameter 40 of intermediate flange 36 of expander 30 . Therefore, when the tip portion of the expander 30 is inserted into the insertion hole 100 of the partition wall 82 , the intermediate flange 36 of the expander 30 contacts the partition wall 82 . As a result, stray light unnecessary for the marking (printing) process is suppressed from exiting the inner cover 14 through the insertion hole 100, and dust and the like enter the inner cover 14 through the insertion hole 100. is suppressed.

In addition, in the laser processing apparatus 1 of the present embodiment, each fastening slit 90 provided in the left extending portion 88 of the inner cover 14 along the direction (horizontal direction) in which the partition wall 82 extends has a width 92 that is hexagonal. It is larger than the diameter 99 of the shaft portion 98 of the socket screw 94 and smaller than the diameter 97 of the head 96 of the hexagon socket screw 94 . Therefore, the shaft portion 98 of the hexagon socket head screw 94 is passed through each fastening slit 90 with a gap therebetween. Thereby, when fixing the inner cover 14 to the base 10 with the hexagon socket screws 94 , the partition wall 82 extends through the inner cover 14 with the hexagon socket screws 94 passed through the fastening slits 90 . The position of the inner cover 14 on the base 10 can be adjusted by moving it in a direction (horizontal direction) or the like. Therefore, in the laser processing apparatus 1 of the present embodiment, it is easy to fix the inner cover 14 to the base 10 .

Further, in the laser processing apparatus 1 of the present embodiment, the pedestal member 50 is fixed to the base 10 with the hexagonal socket head screw 63 passed through the fixing portion 54 of the pedestal member 50 . A second virtual columnar region V2 obtained by extending the head surface of the hexagon socket screw 63 in the screwing direction (vertical direction) of the hexagon socket screw 63 does not overlap the pedestal main body 52 of the pedestal member 50 . Therefore, the operator can easily hang a hexagonal wrench (not shown) or the like on the head surface of the hexagonal socket screw 63 from above in the screwing direction (vertical direction) of the hexagonal socket screw 63 . Therefore, the laser processing apparatus 1 of the present embodiment is excellent in workability for replacing the pedestal member 50 .

Incidentally, in this embodiment, the inner cover 14 is an example of a "cover". The galvano board 18 is an example of a "control board". The hexagon socket head screw 34 is an example of the "first screw". Intermediate flange 36 is an example of a "flange." The rotating mechanism 60 is an example of a "moving mechanism." The hexagon socket screw 63 is an example of a "third screw". The screwing direction (vertical direction) of the hexagon socket head screw 63 is an example of "the screwing direction of the third screw". The X-axis galvanomirror 72 and the Y-axis galvanomirror 74 are examples of "galvanomirrors." The galvanometer substrate 18, the X-axis galvanometer mirror 72, and the Y-axis galvanometer mirror 74 are examples of the "scanning unit." The left extension 88 is an example of an "extension". A pair of fastening slits 90 is an example of "a plurality of fastening portions". The hexagon socket screw 94 is an example of a "second screw." The forward direction D1 is an example of a "first direction." The downward direction D2 is an example of a "second direction." The left direction D3 is an example of the "third direction". The optical path length L1 of the laser light R between the expander 30 and the first mirror 56 in the forward direction D1 is "the optical path length of the laser light between the expander and the first mirror in the first direction". is an example. The optical path length L2 of the laser beam R between the first mirror 56 and the second mirror 58 in the downward direction D2 is defined as "the optical path length of the laser beam R between the first mirror and the second mirror in the second direction. It is an example of "sa".

It should be noted that the present disclosure is not limited to the present embodiment, and various modifications can be made without departing from the scope of the present disclosure.
For example, in this embodiment, the expander 30 is fixed to the laser oscillation unit 12 by three hexagon socket screws 34, but the expander 30 is attached to the laser oscillation unit 12 by at least one hexagon socket screw 34. May be fixed.
Furthermore, the pedestal member 50 does not have to be provided with the rotating mechanism 60 . In such a modification, the first mirror 56 is non-rotatable, but at least one hexagon socket screw 34 is attached to the fixing flange 32 of the expander 30 on the head surface of the hexagon socket screw 34. in the front direction D 1 is arranged at a position that does not overlap the first mirror 56 .

Further, the pedestal member 50 may include an elevating mechanism for moving the first mirror 56 vertically along the pedestal main body 52 instead of the rotating mechanism 60 . In such a modification, for example, the first mirror 56, which is at the first position in the attitude of reflecting the laser beam R from the expander 30 in the downward direction D2, is moved downward by the above-described elevating mechanism. Each first virtual columnar region obtained by extending the head surfaces of all the hexagon socket head screws 34 for fixing the expander 30 to the laser oscillation unit 12 in the forward direction D1 is positioned at the second position where it does not overlap the first mirror 56. move up to
It should be noted that the lifting mechanism described above is an example of a "moving mechanism."

Also, as shown in FIG. 13, when the expander 30 is viewed from the front side, among the three hexagonal socket screws 34 for fixing the expander 30 to the laser oscillation unit 12, the lowermost The hexagon socket screw 34 and the leftmost hexagon socket screw 34 are positioned at the fixing flange 32 of the expander 30 so as to reflect the laser light R from the expander 30 downward D2. It may be arranged at a position not overlapping with respect to 56 . In such a case, similarly to the first virtual columnar region V1 of the lowermost hexagon socket screw 34, the head surface of the leftmost hexagon socket screw 34 is extended in the forward direction D1 to form a first virtual columnar region V1. The columnar region does not overlap the first mirror 56 facing the expander 30 in the forward direction D1.

13 from the position shown in FIG. , to the position shown in FIG. 14 (for example, the position where the first mirror 56 including the mirror surface portion 57 is parallel to the left-right direction).

When the first mirror 56 is in the position shown in FIG. 14, the length L3 of the first mirror 56 in the downward direction D2 is three hexagon socket holes for fixing the expander 30 to the laser oscillation unit 12. It is smaller than the interval L4 in the downward direction D2 of the screw 34 . Furthermore, the first mirror 56 at the position shown in FIG. 14 is positioned between the leftmost and rightmost hexagon socket screws 34 and the bottommost hexagon socket screw 34 in the vertical direction. Intervene.

Therefore, when viewed from the front side, all the hexagon socket screws 34 for fixing the expander 30 to the laser oscillation unit 12 do not overlap the first mirror 56 at the position shown in FIG. In such a case, similarly to the first virtual columnar region V1 of the lowermost hexagon socket screw 34, the head surface of the leftmost hexagon socket screw 34 is extended in the forward direction D1 to form a first virtual columnar region V1. The columnar area and the first imaginary columnar area obtained by extending the head surface of the rightmost hexagon socket head screw 34 in the forward direction D1 do not overlap the first mirror 56 facing the expander 30 in the forward direction D1.

Therefore, in the modified example shown in FIGS. 13 and 14 as well, the operator must: Since it is easy to use a hexagonal wrench (not shown) or the like from the forward direction D1, the expander 30 facing the first mirror 56 can be easily replaced.

Incidentally, in the modified example described above, the position of the first mirror 56 shown in FIG. 13 is an example of the "first position." The position of the first mirror 56 shown in FIG. 14 is an example of the "second position". The length L3 is an example of "the length of the first mirror in the second direction at the second position".
The interval L4 is an example of "the interval in the second direction between the plurality of first screws for fixing the expander".

Also, the number of hexagon socket head screws 34 for fixing the expander 30 to the laser oscillation unit 12 may be one. In such a modified example, the one hexagon socket screw 34 is provided in the fixing flange 32 of the expander 30 by extending the head surface of the one hexagon socket screw 34 in the forward direction D1. The virtual columnar area is arranged at a position not overlapping the first mirror 56 .

Further, the left extending portion 88 of the inner cover 14 may be provided with a pair of fastening holes 104 shown in FIG. 15 instead of each fastening slit 90 . In such a modification, the diameter 106 of each fastening hole 104 is made smaller than the diameter 97 of the head 96 of the hexagon socket screw 94 but larger than the diameter 99 of the shank 98 of the hexagon socket screw 94. . As a result, the shaft portion 98 of the hexagon socket head screw 94 is passed through each fastening hole 104 with a gap therebetween. On the other hand, the head 96 of the hexagon socket head screw 94 cannot pass through each fastening hole 104 and abuts the left extension 88 .

1: Laser processing device, 10: Base, 12: Laser oscillation unit, 14: Inner cover, 15: Cushioning material, 18: Galvano substrate, 19: Wiring, 30: Expander, 34: Hex socket head screw, 36: Intermediate Flange, 50: Pedestal member, 52: Pedestal body, 54: Fixed part, 56: First mirror, 57: Mirror surface part of first mirror, 58: Second mirror, 59: Mirror surface part of second mirror, 60 : rotation mechanism, 62: rotation axis, 63: hexagon socket screw, 72: X-axis galvanomirror, 74: Y-axis galvanomirror, 82: partition, 84: notch, 88: left extension, 90: Fastening slit 92: Width of fastening slit 94: Hexagon socket screw 96: Head of hexagon socket screw 97: Head diameter of hexagon socket screw 98: Shaft of hexagon socket screw 98 100: Insertion hole 102: Insertion hole diameter D1: Forward direction D2: Downward direction D3: Leftward direction L1: Expander and first L2: optical path length of laser light between the first mirror and the second mirror in the downward direction L3: optical path length of the laser light in the downward direction of the first mirror at the second position length, L4: downward spacing of hexagon socket head screws, R: laser light, V1: first virtual columnar region, V2: second virtual columnar region, W: work piece

Claims (11)

a laser oscillation unit that oscillates laser light;
an expander that is fixed by a first screw that is screwed into the laser oscillation unit from the first direction and that emits the laser light incident from the laser oscillation unit in the first direction;
a first mirror that faces the expander in the first direction and reflects laser light incident from the expander in a second direction;
a second mirror that faces the first mirror in the second direction and reflects the laser light incident from the first mirror in a third direction that is twisted with respect to the first direction;
a scanning unit that scans the laser beam incident from the second mirror toward the workpiece,
A laser processing apparatus, wherein a first virtual columnar region of at least one of the first screws, which is obtained by extending a head surface of the first screw in the first direction, does not overlap the first mirror. comprising a plurality of the first screws;
2. The laser processing apparatus according to claim 1, wherein the first virtual columnar regions of all the first screws do not overlap the first mirror. A movement mechanism for moving the first mirror between a first position and a second position,
the first position is a position where the first mirror reflects the laser light in the second direction;
3. The laser processing apparatus according to claim 1, wherein the second position is a position where the first virtual columnar region of at least one of the first screws does not overlap the first mirror. the moving mechanism is a rotating mechanism that rotates the first mirror between the first position and the second position about the third direction as a rotation axis;
4. The method according to claim 3, wherein the length of the first mirror in the second position in the second direction is smaller than the interval in the second direction of the plurality of first screws fixing the expander. Laser processing equipment. The optical path length of the laser light between the expander and the first mirror in the first direction is the optical path length of the laser light between the first mirror and the second mirror in the second direction. shorter than
2. A mirror area of said first mirror capable of reflecting a laser beam from said expander is smaller than a mirror area of said second mirror capable of reflecting a laser beam from said first mirror. 5. The laser processing apparatus according to claim 4. The scanning unit
a galvanomirror for scanning the laser beam incident from the second mirror;
A control board that controls the galvanomirror,
6. The laser according to any one of claims 1 to 5, further comprising a partition interposed between the galvanomirror and the control substrate and blocking between the galvanomirror and the control substrate. processing equipment. The partition includes a notch through which a wiring connecting the galvanomirror and the control board is inserted,
7. The laser processing apparatus according to claim 6, wherein a cushioning material is provided between said wiring and said notch. 8. The laser processing apparatus according to claim 6, further comprising a cover including the partition wall and surrounding the first mirror, the second mirror, and the galvanomirror. The cover has an insertion hole into which the expander is inserted,
9. The laser processing apparatus according to claim 8, wherein the expander has a flange larger than the diameter of the insertion hole on the side surface of the expander. A base on which the laser oscillation unit is placed,
The cover is
an extension extending along the base;
a plurality of fastening portions provided on the extending portion and through which shaft portions of second screws for fixing the cover to the base are passed;
At least one of the plurality of fastening portions is a fastening slit that is parallel to the direction in which the partition wall extends and has a width that is larger than the diameter of the shaft portion of the second screw and smaller than the diameter of the head portion of the second screw. 10. The laser processing apparatus according to claim 8 or 9, characterized in that: a pedestal member on which the first mirror and the second mirror are provided;
The pedestal member is
a pedestal main body erected on the base;
a fixing part through which a third screw for fixing the pedestal member to the base is passed;
3. The third screw is characterized in that a second imaginary columnar region obtained by extending a head surface of the third screw in a screwing direction of the third screw with respect to the base does not overlap the pedestal main body. 11. The laser processing apparatus according to 10.

Images