TWI710420B - Laser processing device - Google Patents

Abstract

The present invention provides a laser processing device, even when the size of the workpiece is different, the workpiece does not float, and the workpiece can be reliably fixed to the worktable. The laser processing device includes: a rectangular workpiece clamping part, composed of first to fourth frames, and arranged on the worktable for fixing the work on the worktable; a clamping drive part for changing the rectangular opening The range and the interval between the workpiece clamping part and the worktable; and the control part for controlling the clamping driving part to increase the interval when the opening range is enlarged, and to reduce the interval when the opening range is reduced.

Description

Laser processing device

The present invention relates to a laser processing device for drilling a workpiece such as a printed circuit board fixed on a workbench, and a technique for fixing the workpiece.

Conventionally, in the processing using a laser processing device, it has been known to suck and fix a printed circuit board as a work on a table. However, since only suction is not enough, the end of the printed circuit board is further fixed with a clamping device and then drilled. (Patent Document 1). [Prior Art Literature]

[Patent Document 1] Japanese Patent Application Publication Heisei 10-328863

In the above-mentioned prior art, the length of the printed circuit board pressing member of the clamping device is fixed, and it cannot respond to changes in the size of the printed circuit board, and it may not be possible to press the four sides of the end of the printed circuit board. Therefore, there are disadvantages such as occurrence of a portion where the printed circuit board floats from the table, an error in reading the alignment mark attached to the vicinity of the end of the printed circuit board, and the like, and the processing accuracy is low.

The object of the present invention is to provide a laser processing device which can reliably fix the workpiece to a table without floating even when the size of the workpiece is different. [Means to solve the problem]

In order to solve the above-mentioned problems, the laser processing device of the present invention includes: a workpiece holding part, including: a first frame provided on a worktable for fixing the work on the worktable, and installed for fixing the work on the worktable A first clamper on the first side of the end side; a second frame installed with a second clamper for fixing a second side perpendicular to the first side on the end side of the workpiece; The third frame, parallel to the first frame; the fourth frame, parallel to the second frame; the first member, parallel to the first frame and movable in the direction perpendicular to the first frame, is installed for fixing A third holder parallel to the third side of the first side on the end side of the workpiece; a second member, parallel to the second frame and movable in a direction perpendicular to the second frame, installed There is a fourth holder for fixing the fourth side parallel to the second side on the end side of the workpiece; the first fixing part, the end of the first frame and the end of the fourth frame are mutually Fixed; and a second fixing part for fixing the end of the second frame and the end of the third frame to each other; a clamping driving part for changing the first fixing part and the second fixing part An interval and a second interval between the workpiece clamping portion and the worktable; and a control portion, which controls the clamping driving portion to increase the second interval when the first interval is increased, and to reduce the first interval At one interval, the second interval is reduced. [Effects of the invention]

According to the present invention, even when the size of the workpiece is different, the workpiece can be reliably fixed to the table without lifting the workpiece.

Fig. 4 is a schematic diagram 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 the laser light source. The XY table 5 moves the workpiece 4 in the X direction (the vertical direction with respect to the paper surface) and the Y direction (the left-right direction with respect to the paper surface). The workpiece clamping part 6 fixes the workpiece 4 on the XY table 5. The camera 2 photographs the alignment mark of the workpiece 4. The grip lever drive unit 8 moves the grip lever 7 in the Z direction (up and down direction with respect to the surface of the paper) and the P direction described later. The overall control unit 3 controls the laser unit 1, the camera 2, the XY table 5, the workpiece clamping unit 6, the clamping rod driving unit 8, and the like. The clamping rod driving part 8 is provided in the XY table 5.

1 to 3 show the details of the work holding portion 6 of FIG. 4. The respective clamping frames 21, 22, 23, and 24 respectively constitute four sides of the rectangular workpiece clamping portion 6. The clamping frames 21 and 24 are fixed to each other at a right angle by a fixing portion 29 at one end, and have an L shape. In addition, similarly, the clamping frames 22 and 23 are fixed to each other at a right angle by the fixing portion 30 at one end, and have an L shape. Guide grooves 31 to 34 are formed on the clamping frames 21 to 24, respectively. The clamping rod 25 is slidably fitted to the guide groove 31 and the guide groove 33 so as to be movable in the Y direction of the paper surface. One end of the clamping rod 26 is slidably fitted in the guide groove 32, and the other end passes through the guide groove 35 provided on the clamping rod 25, and is slidably fitted in the guide groove 34 formed on the clamping frame 24 to Able to move in the X direction on the paper surface.

The clampers 36 and 37 are installed on the lower sides of the clamp frames 21 and 22, respectively, and the clampers 38 and 39 are installed on the lower sides of the clamp bars 25 and 26, respectively. The holders 38 and 39 of various lengths are prepared respectively, so that the operator can appropriately replace them according to the size of the workpiece 4. The fixing parts 29 of the clamping frames 21 and 24 and the fixing parts 30 of the clamping frames 22 and 23 are combined with the clamping rod driving part 8 provided in the XY table 5 through the clamping rod 7 installed below them.

The fixing portions 29 and 30 are located on the diagonals of the rectangle surrounded by the clamping frames 21-24. The clamping rod driving part 8 is controlled by the control signal 9 from the overall control part 3 to drive the clamping rod 7 to the P direction, that is, the diagonal direction, so that the interval between the fixing parts 29 and 30 can be changed. In addition, the other ends of the clamping frames 21 and 22 are connected to each other by the connecting portion 27 formed by the piston and the cylinder, and the other ends of the clamping frames 23 and 24 are similarly connected by the connecting portion 28 formed by the piston and the cylinder. Connect to each other. The connecting parts 27 and 28 are controlled by the control signal 10 from the overall control part 3, so that the interval between the connecting parts can be changed.

When the opening range of the rectangular window 40 surrounded by the clamping frames 21 and 22 and the clamping rods 25 and 26 is enlarged, the interval between the fixing parts 29 and 30 is enlarged, and the connecting part is also enlarged. The interval between the connecting part of 27 and 28. Conversely, when the opening range of the window 40 is reduced, the interval between the fixing portions 29 and 30 is reduced, and the interval between the connecting portions 27 and 28 is also reduced.

In addition, the gripping lever drive unit 8 is controlled by the control signal 9 from the overall control unit 3 to drive the gripping lever 7 in the Z direction (up and down direction with respect to the paper surface) from the XY table 5 side. That is, when the opening range of the window 40 is reduced, the clamping lever 7 is driven downward in the Z direction, and the work clamping portion 6 is lowered to clamp the work 4. Conversely, when the opening range of the window 40 is enlarged, the clamping rod 7 is driven upward in the Z direction to raise the work clamping portion 6 to release the clamping of the work 4.

When the workpiece 4 is fed onto the XY table 5, first, the XY table 5 is moved in the X direction to a position where the workpiece holder 6 and the laser unit 1 are not opposed to each other. After that, the clamping rod 7 is pushed upward in the Z direction by the clamping rod driving part 8 provided in the XY table 5 to raise the workpiece clamping part 6 and at the same time increase the opening range of the window 40. In this state, the workpiece 4 is inserted from the upper side of the workpiece holding portion 6 through the window 40 by a dedicated workpiece conveying mechanism not shown. This state (unclamped state) is shown in Figure 2. The part shown by diagonal lines in the figure is the work 4. After that, while narrowing the opening range of the window 40, the clamping rod 7 is driven downward in the Z direction to lower the workpiece clamping portion 6. Thereby, the workpiece 4 is fixed between the workpiece clamping portion 6 and the XY table 5. This state (clamping state) is shown in Figure 3. The processing of the workpiece 4 by the laser unit 1 is performed after the XY table 5 is moved in the X direction to a position where the workpiece holding portion 6 and the laser unit 1 are opposed to each other.

When the workpiece 4 is sent out from the XY table 5, first, the XY table 5 is moved in the X direction to a position where the workpiece holder 6 and the laser unit 1 are not opposed to each other. After that, it becomes the above-mentioned unclamped state, and the workpiece 4 is taken out from the upper side through the window 40 by a dedicated workpiece transport mechanism.

In addition, when handling workpieces 4 of different sizes, the clamping rods 25 and 26 are moved in the Y and X directions to correspond to the size, and the clamps 38 and 39 of the corresponding size are installed in each clamping Sticks 25, 26. This is performed in the above-mentioned unclamped state where there is no workpiece 4 and the opening range of the window 40 is enlarged.

According to the above embodiment, since the four sides of the end of the workpiece 4 such as a printed circuit board can be reliably fixed, the workpiece 4 does not float from the upper surface of the XY table 5, which can prevent the end of the workpiece 4 from floating. The machining accuracy is reduced. In addition, corresponding to the size of the workpiece 4, the clamping rods 25 and 26 are moved in the Y and X directions while exchanging the grippers 38 and 39, so that the workpiece 4 of various sizes can be fixed on the XY table 5.

Furthermore, in the above-mentioned embodiment, although the clamp lever driving portion 8 drives both the fixing portions 29 and 30, when only one of the fixing portions 29 or 30 is driven, the opening range of the window 40 can be adjusted. It must be necessary to drive both.

Furthermore, in the above-mentioned embodiment, although the connecting parts 27 and 28 are controlled by the overall control part 3 to control the interval of the connecting parts, when the opening range of the window 40 can be adjusted only by the drive fixing parts 29 and 30, the connection The parts 27 and 28 may only be slidably fitted to the ends of the frame, and not controlled by the overall control part 3.

In addition, in the above embodiment, although one piece of work 4 is fixed on the XY table 5, it is also possible to install a plurality of laser units 1 and multiple pieces of work 4, and to provide the same number of work holding parts as the work 4. 6. To fix and process multiple pieces of workpiece 4 at the same time.

In addition, the present invention is not limited to the above-mentioned embodiments, and various changes are possible. All of the technical matters including the technical ideas recorded in the scope of the patent application are the objects to be protected by the present invention.

1‧‧‧Laser unit2‧‧‧Camera3‧‧‧Integral control part4‧‧‧Workpiece5‧‧‧XY table6‧‧‧Workpiece clamping part7‧‧‧Clamping rod8‧‧‧ Clamping lever drive part 9, 10‧‧‧Control signal 21~24‧‧‧Clamping frame 25, 26‧‧‧Clamping rod 27, 28‧‧‧Connecting part 29, 30‧‧‧Fixed part 31~35 ‧‧‧Guide groove 36~39‧‧‧Gripper 40‧‧‧Window P‧‧‧Direction X‧‧‧Direction Y‧‧‧Direction Z‧‧‧Direction

Fig. 1 is a perspective view of a workpiece clamping part of a laser processing device according to the present invention. Fig. 2 is a diagram showing an unclamped state of the work holding portion of Fig. 1. Fig. 3 is a diagram showing a clamping state of the work clamping portion of Fig. 1. Fig. 4 is a schematic diagram of a laser processing device according to the present invention.

6‧‧‧Workholding part

8‧‧‧Clamping lever drive

21~24‧‧‧Clamping frame

25、26‧‧‧Clamping rod

27, 28‧‧‧Connecting part

29, 30‧‧‧Fixed part

31~35‧‧‧Guide groove

37、39‧‧‧Gripper

40‧‧‧Window

X‧‧‧direction

Y‧‧‧ direction

Claims (2)

A laser processing device includes: a workpiece holding part, including: a first frame, which is provided on a work table for fixing the work on the work table, and is equipped with a first frame for fixing on the end side of the work A second holder for the first side of the workpiece; a second frame installed with a second holder for fixing a second side perpendicular to the first side of the workpiece; a third frame, parallel to the The first frame; the fourth frame, parallel to the second frame; the first member, parallel to the first frame and movable in the direction perpendicular to the first frame, is installed for fixing the end parallel to the workpiece Part side of the third side of the first side of the third side of the third holder; a second member, parallel to the second frame and movable in the direction perpendicular to the second frame, is installed for fixing parallel to the A fourth clamper on the fourth side of the second side on the end side of the workpiece; a first fixing portion for fixing the end of the first frame and the end of the fourth frame to each other; and a second fixing portion , The end of the second frame and the end of the third frame are fixed to each other; a clamping drive part for changing the first interval between the first fixing part and the second fixing part and clamping the workpiece And a control part that controls the clamping drive part to increase the second interval when the first interval is increased, and to decrease the second interval when the first interval is reduced Interval; the workpiece clamping portion includes: a first connecting portion, the other end of the first frame and the other end of the second frame are connected to each other, and the third interval in the connecting portion of the first connecting portion can be changed; And a second connecting part, connecting the other end of the third frame and the other end of the fourth frame to each other, and the fourth interval at the connecting part of the second connecting part can be changed; And wherein, the control unit controls the first connection portion and the second connection portion so that when the first interval is increased, the third interval and the fourth interval are increased, and when the first interval is decreased, the The third interval and the fourth interval. The laser processing device according to claim 1, wherein the clamping drive part is provided inside the worktable and is configured to pass through a member fixed on the first fixing part and the second fixing part The first fixing part and the second fixing part are driven.

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