CN107538138B

CN107538138B - Laser processing apparatus

Info

Publication number: CN107538138B
Application number: CN201710494389.3A
Authority: CN
Inventors: 时田大作
Original assignee: Via Mechanics Ltd
Current assignee: Via Mechanics Ltd
Priority date: 2016-06-27
Filing date: 2017-06-26
Publication date: 2020-09-01
Anticipated expiration: 2037-06-26
Also published as: KR20180001449A; JP6806625B2; TWI710420B; JP2018001273A; KR102304688B1; CN107538138A; TW201800169A

Abstract

The invention provides a laser processing device, which can reliably fix a workpiece on a workbench without floating the workpiece even if the sizes of the workpiece are different. A laser processing device is characterized by comprising: a rectangular workpiece clamping portion, which is composed of a first frame to a fourth frame, is arranged on the workbench and is used for fixing the workpiece on the workbench; a clamping drive section for changing the width of the rectangle and the interval between the workpiece clamping section and the table; and a control unit that controls the clamp driving unit so as to expand the gap when the lateral width is expanded and to reduce the gap when the lateral width is reduced.

Description

Laser processing apparatus

Technical Field

The present invention relates to a laser processing apparatus for drilling a workpiece such as a printed circuit board fixed to a table, and relates to a technique for fixing a workpiece.

Background

Conventionally, when machining in a laser machining apparatus, it is known to suction-fix a printed circuit board as a workpiece on a table. However, since only the suction is insufficient, the end portion of the printed circuit board is fixed by the chuck mechanism and the punching process is performed (patent document 1).

Documents of the prior art

Patent document

Patent document 1 Japanese patent application laid-open No. 10-328863

Disclosure of Invention

Technical problem to be solved by the invention

In the conventional technique as described above, the length of the printed circuit board pressing member of the clamping mechanism is fixed, and therefore, it is impossible to cope with a change in the size of the printed circuit board, and the four sides of the end portion of the printed circuit board may not be pressed. Therefore, there is a disadvantage that a portion floating from the table is generated on the printed board, and the processing accuracy is deteriorated, such as an error in reading the alignment mark marked in the vicinity of the end portion of the printed board.

The present invention aims to provide a laser processing device which can reliably fix a workpiece on a workbench without floating the workpiece even if the sizes of the workpiece are different.

Means for solving the technical problem

In order to solve the above problem, a laser processing apparatus according to the present invention includes: a workpiece clamping portion provided on a table for fixing a workpiece to the table, the workpiece clamping portion including: a first frame to which a first clamper for fixing a first edge positioned on an end side of the workpiece is attached; a second frame to which a second holder for fixing a second edge located on an end side of the workpiece is attached, the second edge being at right angles to the first edge; a third frame parallel to the first frame; a fourth frame parallel to the second frame; a first member that is parallel to the first frame and is movable in a direction at right angles to the first frame, the first member being attached to a third clamp that fixes a third edge on an end side of the workpiece, the third edge being parallel to the first edge; a second member that is parallel to the second frame and is movable in a direction at right angles to the second frame, the second member being attached with a fourth gripper for fixing a fourth edge on an end side of the workpiece, the fourth edge being parallel to the second edge; a first fixing portion fixing an end portion of the first frame and an end portion of the fourth frame to each other; and a second fixing portion fixing an end portion of the second frame and an end portion of the third frame to each other; a clamp driving portion for changing a first interval between the first fixing portion and the second fixing portion and a second interval between the workpiece clamping portion and the table; and a control unit that controls the clamp driving unit so that the second interval is increased when the first interval is increased and the second interval is decreased when the first interval is decreased.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present invention, even when the sizes of the workpieces are different, the workpieces can be reliably fixed to the table without floating the workpieces.

Drawings

Fig. 1 is a perspective view of a workpiece clamping portion in a laser processing apparatus according to the present invention.

Fig. 2 is a view showing a released state of the work clamping portion of fig. 1.

Fig. 3 is a view showing a clamped state of the work clamping portion of fig. 1.

Fig. 4 is a schematic view of a laser processing apparatus according to the present invention.

Description of the symbols

1 laser unit 2 camera 3 integral control part 4 work 5XY table 6 work piece clamping part 7 clamping rod 8 clamping

rod driving part

9, 10 control signal 21-24

clamping frame

25, 26

clamping rod

27, 28 connecting part 36-39 clamper 40 window

Detailed Description

Fig. 4 is a schematic view of a laser processing apparatus according to an embodiment of the present invention.

The laser unit 1 irradiates the surface of the workpiece 4 with laser light emitted from a laser light source. The XY table 5 moves the workpiece 4 in the X direction (vertical direction to the paper surface) and the Y direction (horizontal direction to the paper surface). And a workpiece clamping part 6 for fixing the workpiece 4 on the XY table 5. The camera 2 picks up an image of an alignment mark of the workpiece 4. The clamp lever driving unit 8 moves the clamp lever 7 in the Z direction (vertical direction with respect to the paper surface) and in the P direction, which will be described later. The overall control unit 3 controls the laser unit 1, the camera 2, the XY table 5, the work clamp 6, the clamp rod driving unit 8, and the like. The clamp lever driving unit 8 is provided in the XY table 5.

Fig. 1 to 3 are views showing details of the work clamping portion 6 in fig. 4. 21. 22, 23, and 24 are clamp frames, respectively, and form four sides of the rectangular workpiece clamping portion 6. The

clamp frames

21 and 24 are fixed to each other at one end in a right-angle direction at a fixing portion 29 to be L-shaped. Similarly, the

clamp frames

22 and 23 are fixed to each other at one end in the right-angle direction by the fixing portion 30, and are L-shaped. Guide grooves 31 to 34 are formed in the clamp frames 21 to 24, respectively. Reference numeral 25 denotes a clamp rod which is slidably fitted in the guide groove 31 and the guide groove 33 and is movable in the Y direction on the paper surface. Reference numeral 26 denotes a clamp rod, one end of which is slidably fitted in the guide groove 32, and the other end of which is slidably fitted in a guide groove 34 formed in the clamp frame 24 so as to penetrate through a guide groove 35 provided in the clamp rod 25, and which is movable in the direction of the drawing sheet X.

Grippers

36 and 37 are attached to the lower sides of the

clamp frames

21 and 22, respectively, and

grippers

38 and 39 are attached to the lower sides of the

clamp rods

25 and 26, respectively. The

grippers

38, 39 are each provided with a plurality of lengths, and can be appropriately replaced by an operator according to the size of the workpiece 4. The fixing portions 29 of the

clamp frames

21 and 24 and the fixing portions 30 of the

clamp frames

22 and 23 are coupled to a clamp rod driving portion 8 provided in the XY table 5 via a clamp rod 7 attached to the lower side thereof.

The

fixing portions

29 and 30 are located on the diagonal line of a rectangle surrounded by the clamp frames 21 to 24, and the clamp lever driving portion 8 drives the clamp lever 7 in the P direction, i.e., the diagonal direction, by controlling in accordance with the control signal 9 from the overall control portion 3, thereby changing the interval between the

fixing portions

29 and 30. The other ends of the

clamp frames

21 and 22 are connected to each other by a connecting portion 27 in which a piston and a cylinder are combined, and the other ends of the

clamp frames

23 and 24 are also connected to each other by a connecting portion 28 in which a piston and a cylinder are combined in the same manner. The

coupling portions

27 and 28 are controlled in accordance with the control signal 10 from the overall control portion 3, and the intervals between the coupling portions can be changed.

When the width of the rectangular window 40 surrounded by the

clamp frames

21 and 22 and the

clamp rods

25 and 26 is increased, the distance between the

fixing portions

29 and 30 is increased, and the distance between the connecting

portions

27 and 28 is also increased. Conversely, when the width of the window 40 is reduced, the distance between the

fixing portions

29 and 30 is reduced, and the distance between the connecting

portions

27 and 28 is also reduced.

The clamp lever driving unit 8 is controlled by a control signal 9 from the overall control unit 3, and can drive the clamp lever 7 in the Z direction (vertical direction with respect to the paper surface) from the XY table 5 side. That is, when the width of the window 40 is reduced, the clamp rod 7 is driven downward in the Z direction, and the workpiece clamp 6 is lowered to clamp the workpiece 4. Conversely, when the width of the window 40 is increased, the clamp rod 7 is driven upward in the Z direction to raise the workpiece clamp 6, thereby releasing the clamping of the workpiece 4.

When the workpiece 4 is carried onto the XY table 5, first, the XY table 5 is moved in the X direction to a position where the workpiece clamping portion 6 does not face the laser unit 1. Thereafter, the clamp rod 7 is pushed upward in the Z direction by the clamp rod driving unit 8 provided in the XY table 5 to raise the workpiece clamp 6, and the lateral width of the window 40 is enlarged. In this state, the workpiece 4 is inserted from above the workpiece clamping portion 6 through the window 40 by a not-shown dedicated workpiece conveying mechanism. This state (released state) is shown in fig. 2. The part of the figure shown by hatching is the workpiece 4. Thereafter, the width of the window 40 is reduced, and the clamp rod 7 is driven downward in the Z direction to lower the work clamp 6. Thereby, the workpiece 4 is fixed between the workpiece clamping portion 6 and the XY table 5. This state (clamped state) is shown in fig. 3. The machining of the workpiece 4 by the laser unit 1 is performed after moving the XY table 5 in the X direction to a position where the workpiece clamping portion 6 faces the laser unit 1.

When the workpiece 4 is carried out from the XY table 5, first, the XY table 5 is moved in the X direction to a position where the workpiece clamp 6 does not face the laser unit 1. Thereafter, the work 4 is taken out from the upper side through window 40 by a dedicated work conveying mechanism in the unclamped state.

When workpieces 4 having different sizes are to be processed, the

clamp rods

25 and 26 are moved in the direction Y, X according to the sizes, and the

grippers

38 and 39 corresponding to the sizes are attached to the

clamp rods

25 and 26, respectively. This is performed in the above-described released state in which the workpiece 4 is not present, and in a state in which the lateral width of the window 40 is enlarged.

According to the above embodiment, since the four sides of the end portion of the workpiece 4 such as the printed circuit board can be reliably fixed, there is no portion of the workpiece 4 that floats from the upper surface of the XY table 5, and it is possible to prevent the lowering of the machining accuracy due to the floating of the end portion of the workpiece 4. Further, by moving the

clamp rods

25 and 26 in the Y, X direction in accordance with the size of the workpiece 4 and replacing the

grippers

38 and 39, workpieces 4 of various sizes can be fixed to the XY table 5.

It should be noted that, in the above embodiment, although the clamp lever driving section 8 drives both the fixing

sections

29 and 30, in the case where only one of the fixing sections 20 or 30, that is, the width of the adjustable window 40 is driven, both the fixing

sections

29 and 30 are not necessarily driven.

It should be noted that, in the above-described embodiment, although the

coupling portions

27, 28 are controlled by the overall controller 3 to control the intervals of the coupling portions, in the case where only the fixing

portions

29 and 30, i.e., the width of the adjustable window 40 is driven, the

coupling portions

27, 28 may be configured such that only the ends of the frames are slidably fitted to each other without being controlled by the overall controller 3.

In the above-described embodiment, although the one workpiece 4 is fixed to the XY table 5, a plurality of laser units 1 and workpieces 4 may be provided, and the same number of workpiece clamping portions 6 as the number of workpieces 4 may be provided to simultaneously fix the plurality of workpieces 4 and perform machining.

The present invention is not limited to the above-described embodiments and various modifications are possible, and all technical matters included in the technical idea described in the claims are intended to be the object of the present invention.

Claims

1. A laser processing device is characterized by comprising:

a workpiece clamping portion provided on a table for fixing a workpiece to the table, the workpiece clamping portion including: a first frame to which a first clamper for fixing a first edge positioned on an end side of the workpiece is attached; a second frame to which a second holder for fixing a second edge located on an end side of the workpiece is attached, the second edge being at right angles to the first edge; a third frame parallel to the first frame; a fourth frame parallel to the second frame; a first member that is parallel to the first frame and is movable in a direction at right angles to the first frame, the first member being attached to a third clamp that fixes a third edge on an end side of the workpiece, the third edge being parallel to the first edge; a second member that is parallel to the second frame and is movable in a direction at right angles to the second frame, the second member being attached with a fourth gripper for fixing a fourth edge on an end side of the workpiece, the fourth edge being parallel to the second edge; a first fixing portion fixing an end portion of the first frame and an end portion of the fourth frame to each other; and a second fixing portion fixing an end portion of the second frame and an end portion of the third frame to each other;

a clamp driving portion for changing a first interval between the first fixing portion and the second fixing portion and a second interval between the workpiece clamping portion and the table; and

a control unit that controls the clamp driving unit so that the second interval is increased when the first interval is increased and the second interval is decreased when the first interval is decreased,

the work clamping portion has: a first connecting portion that connects the other end portion of the first frame and the other end portion of the second frame to each other, the first connecting portion being configured such that a third interval between the connecting portions is variable; and a second connecting portion connecting the other end of the third frame and the other end of the fourth frame to each other, a fourth interval of a connecting portion of the second connecting portion being variable,

the control unit controls the first coupling unit and the second coupling unit so that the third interval and the fourth interval are enlarged when the first interval is enlarged, and the third interval and the fourth interval are reduced when the first interval is reduced.

2. Laser processing apparatus according to claim 1,

the clamp driving part is provided inside the table, and drives the first fixing part and the second fixing part via a member fixed to the first fixing part and the second fixing part.