JPH11785A - Workpiece positioning device for laser beam machine - Google Patents

Abstract

(57) [Problem] To provide a positioning device of a laser processing machine for accurately positioning a sheet-shaped workpiece, which is easily charged with static electricity and easily curls, at a predetermined position. SOLUTION: In a state where a sheet-like workpiece 1 carried on a surface plate 2 is floated by exhaust from an opening 3 provided in the surface plate 2 to facilitate movement, the bending prevention portions 16a to 16 are provided.
The sheet is clamped at both ends by d, and is pushed out to the reference pin 5 side by the push-out pin 7 of the positioning operation section 10 to position the end of the sheet 1 by abutting the reference pin 5. The sheet 1 is easily curled and tends to be charged with static electricity. However, since the sheet 1 is levitated on the surface plate 2 by the exhaust and is sandwiched by the bending prevention unit 16, it can be easily moved while maintaining a flat state, and the accurate positioning can be smoothly performed. It can be carried out.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a workpiece positioning device for a laser processing machine for positioning a sheet-shaped workpiece at a predetermined processing position of the laser processing machine.

[0002]

2. Description of the Related Art A laser processing machine is used for processing minute holes with high precision in a resin sheet used for a multilayer substrate or the like on which electronic circuits are formed at high density. In order to carry out this processing efficiently and at low cost, a plurality of sheets are spread on a large-sized sheet to form one processing sheet,
It is desired to process them all at once.

A conventional apparatus for positioning such a large-sized sheet at a predetermined position of a laser beam machine is configured as shown in FIG. 5, and is carried on a surface plate 22 provided at a predetermined position. The sheet 1 is extruded toward the reference pins 23 by the positioning pins 24, and the sheet 1 is positioned by bringing the reference ends of the sheets 1 into contact with the reference pins 23.

[0004]

However, since the sheet 1 is supplied in a roll state before being cut as one sheet of a processing size, the curled shape at the time of the roll remains even after the cut, As this becomes larger, the tendency to curl becomes stronger, and the resin sheet 1 is easily charged with static electricity.
When pressed by the positioning pins 24, the movement on the surface plate 22 is not smooth due to the electrostatic attraction and the remaining curl shape. There was a problem of lowering.

An object of the present invention is to provide a workpiece positioning device for a laser beam machine which can accurately position a sheet-shaped workpiece.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a workpiece positioning device for a laser processing machine for positioning a sheet-shaped workpiece at a predetermined processing position of the laser processing machine. By switching between intake and exhaust to an air flow hole formed on a mounting surface on which a workpiece is placed, the placed workpiece is sucked or floated, and then floated to move the workpiece. A platen for holding the workpiece positioned by suction, in a flat state, a reference pin for regulating the position of a reference end of the workpiece placed on the platen, Means for preventing the workpiece from being bent by sandwiching the reference end side and the opposite side of the sheet-like workpiece placed on the both sides from both sides, and extruding the workpiece toward the reference pin side to prevent the workpiece from bending. Make the reference end of the workpiece abut the reference pin And characterized by being provided with a positioning operation unit.

[0007] According to the above construction, the sheet-like workpiece carried on the surface plate floats by being exhausted from the air circulation holes formed in the surface plate. It is in a state where it can be smoothly moved without being adsorbed on the surface. In this state, since the workpiece is not deformed into a curved state by sandwiching both surfaces of the workpiece from the reference end side and the opposite side with the bending prevention means,
The workpiece is pushed out to the reference pin side by the positioning operation unit, and the workpiece is positioned when the reference end of the workpiece is brought into contact with the reference pin. It is sucked up and held in a positioned state. With this configuration, the state where the curl shape remains when the workpiece is in a roll state or the positioning operation is not performed smoothly and accurately due to adhesion to the surface plate due to electrostatic charging is solved. The precision of laser processing can be performed by improving the positioning accuracy of the laser beam.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings to provide an understanding of the present invention.
The embodiment described below is configured as a positioning device for positioning a resin sheet used for a multi-layer substrate forming a high-density electronic circuit at a predetermined position of a laser processing machine.

FIG. 1 is a plan view of a positioning device 20, and FIG.
Shows a side view in the direction of arrows AA of FIG. 2, and the positioning device 20 includes a surface plate 2, a reference pin 5, and a bending prevention portion 16a.
16d, and is configured to include a positioning operation unit 10, and positions the sheet 1 carried on the surface plate 2 at a predetermined position.

The platen 2 is provided with a number of openings (air flow holes) 3 on a mounting surface on which the sheet 1 is mounted, and each opening 3 has an air pipe as shown in FIG. Is connected to an air intake / exhaust switching device 4 and is connected to an air intake / exhaust device (not shown).
When the sheet is held by suction and exhausted from the opening 3, the mounted sheet 1 is slightly lifted to easily move the mounting position.

The reference pin 5 serves as a reference point for positioning the sheet 1 placed on the surface plate 2 in the X-axis direction in the figure, and serves as a reference end for positioning the sheet 1 in the X-axis direction. By bringing the end portions into contact, positioning in the X-axis direction is performed. The positioning in the Y-axis direction is performed by bringing an end side of the sheet 1 carried into the surface plate 2 from the Y-axis direction into contact with a positioning side 2a of the surface plate 2. The reference pin 5 is attached to a lifting drive 6 as shown in FIG. 2 and is at a raised position when set on a laser beam machine, lowered during positioning and fixed at a predetermined position shown in the figure.

The positioning operation unit 10 moves the sheet 1 placed on the surface plate 2 to the reference pin 5 side by moving the push pins 7, 7 in the X-axis direction by a linear drive device 8 shown in FIG. And the reference end of the sheet 1 is brought into contact with the reference pin 5 so as to be positioned.
Each of the push pins 7, 7 attached to the distal ends of the rotating arms 7a, 7a has a spring 9, 9, respectively.
The rear end 7a is configured to contact the sheet 1 at a predetermined pressure by urging the rear end in the pulling direction.

The bending prevention section 16 is provided with the positioning operation section 1.
A pair of bending prevention portions 16a and 16b are provided on the 0 side, and a pair of bending prevention portions 16c and 16d are provided on the reference pin 5 side. FIG. 3 is a side view of the bending prevention unit 16a, and the other bending prevention units 16b to 16d have the same configuration. As shown in the figure, a pair of levers 25 each having a holding pin 11 at a front end and a cam follower 13 at a rear end,
Reference numeral 25 intersects at the position of the support shaft 12 and is rotatably supported by the support shaft 12. The rotation shaft 12 is connected to a cylinder 15, and the operation of the cylinder 15 causes the support shaft 12 to rotate.
When the sheet is pushed out toward the platen 2, the interval between the cam followers 13, 13 placed on the inclined surface of the cam 14 fixed at a predetermined position is widened. Of the positioning operation unit 1
0 prevents the sheet 1 from bending when the end of the sheet 1 is pressed. The sheet 1 can be held by the holding pins 11 only by holding the sheet 1 so that the sheet 1 does not bend.
The sheet 1 is sandwiched with a small gap between
Hold so that it can move freely in the axial direction. Since the curving prevention portions 16a to 16d are provided on both sides in the X-axis direction, the curl state when the sheet 1 is in a rolled state by sandwiching both sides of the sheet 1 remains. It can be held without bending.

Next, an operation of positioning the sheet 1 at a predetermined position by the above configuration will be described.

First, when the sheet 1 is carried into the surface plate 2, air is discharged from the opening 3 of the surface plate 2 to slightly float the sheet 1 so that the position of the sheet 1 can be easily moved. I do. Since the sheet 1 is made of resin, it is easily charged with static electricity.
If the static electricity adheres to the surface plate 2, the movement becomes difficult. If the surface is floated by the exhaust air from the opening 3, the movement is smooth.

Next, the reference pin 5 is lowered by the lifting drive device 6 and set at a predetermined position. Furthermore, cylinder 1
5, the respective bending prevention portions 16a to 16d are operated to hold both ends of the sheet 1 in the X-axis direction by the holding pins 11, and the push-out pins 7,
The sheet 1 placed on the surface plate 2 is pushed out by moving the sheet 7 to the reference pin 5 side, and the edge of the sheet 1 on the reference end side is brought into contact with the reference pin 5 for positioning.

When the position of the sheet 1 is determined, the air intake / exhaust switch 4 is switched to the intake air to suck air from the opening 3 of the surface plate 2, and the positioned sheet 1 is suction-held on the surface plate 2. Thereafter, the positioning operation unit 10, the bending prevention unit 16, and the reference pin 5 retreat from both sides of the surface plate 2, respectively, and move to the standby position.

FIG. 4 shows the structure of the laser beam machine. The sheet gripper 1 is placed on an X-axis table 18 and a Y-axis table 19.
7 is provided. The positioning device 20 includes:
Since the sheet 1 held on the surface plate 2 in the positioned state is arranged by the operation of the Y-axis table 18 because the sheet 1 is disposed adjacent to the position of the sheet gripping portion 17 of the laser processing machine in the Y-axis direction. Both sides are gripped by the sheet gripper 17 moved to the position of the platen 2 and moved to the laser processing position. The sheet 1 is processed by irradiating the laser 50 with both ends held.

[0019]

As described above, according to the present invention, the sheet-like workpiece carried on the surface plate is slightly lifted by the exhaust air from the air flow holes formed in the surface plate, and the surface is moved. Can be smoothly moved, and furthermore, the workpiece is prevented from being deformed into a curved state by sandwiching both sides of the reference end side and the opposite side of the workpiece with the bending prevention means, so that the positioning operation unit By pushing the workpiece to the reference pin side, the reference end of the workpiece is brought into contact with the reference pin for positioning. The positioned workpiece is sucked onto the surface plate by switching the air flow holes of the surface plate to intake air, and is maintained in a positioned state. This configuration solves the problem that the curl shape when the workpiece is in a roll state remains or the positioning operation is not performed smoothly and accurately due to adhesion to the surface plate due to electrostatic charging,
The positioning accuracy of the workpiece is improved, and precise laser processing can be performed.

[Brief description of the drawings]

FIG. 1 is a plan view showing a configuration of a positioning device according to an embodiment of the present invention.

FIG. 2 is a side view showing the configuration of the positioning device in the direction of arrows AA in FIG. 1;

FIG. 3 is a side view illustrating a configuration of a bending prevention unit according to the embodiment.

FIG. 4 is a side view showing the configuration of the laser beam machine.

FIG. 5 is a side view showing a configuration of a positioning device according to a conventional example.

[Description of Signs] 1 Sheet (workpiece) 2 Surface plate 3 Opening (air flow hole) 5 Reference pin 10 Positioning operation unit 16 Bending prevention unit 20 Positioning device

Claims (1)

[Claims] 1. A workpiece positioning device for a laser beam machine for positioning a sheet-shaped workpiece at a predetermined position of a laser beam machine, wherein an air flow formed on a mounting surface on which the workpiece is mounted. The placed workpiece is sucked or floated by switching between intake and exhaust to the hole, making it easier to move the workpiece by floating, and bringing the workpiece positioned by suction into a planar state. A holding surface plate, a reference pin for regulating a position of a reference end of the workpiece placed on the surface plate, and a reference end side of a sheet-like workpiece placed on the surface plate and the reference pin. A bending prevention means for preventing bending of the workpiece by sandwiching the opposite side from both sides, and a positioning operation unit for extruding the workpiece to the reference pin side and abutting the reference end of the workpiece on the reference pin. Laser characterized by comprising Workpiece positioning apparatus of the working machine.