JPH01278991A - Laser beam machine - Google Patents

Abstract

PURPOSE:To obtain a laser beam machine damaging neither work head nor clamp by providing the XY table which stops by the movement to an operation limit, the change-over switch reactuating a laser oscillator and the signal lamp lit by the change-over of the change-over switch. CONSTITUTION:When a limit value 5 exceeds a work head 1 in case of working a work part 6, a work table 3 and laser oscillator become in a field holding state, a display lamp 10 is lit and the damage of a work head, etc. is prevented. When the positions of the work part 6 and a clamp 4 are confirmed and it is judged all right to continue working as it is, a change-over switch 8 is shifted, an operation reopening switch 11 is turned on and the working is executed with confirming that the work head 1 and clamp 4 are not interfering. Even when a work part 7 is worked, the display lamp 10 is lit when the limit line 5 exceeds the work head 1, so working is executed with confirming the lamp 4 and work head 1 not interfering.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a laser processing device, and particularly to a laser processing device for processing a workpiece on an XY table.

(Prior Art) In FIG. 3, which shows an example of a conventional laser processing device for processing a workpiece on an XY table, a processing head 1 attached to a gate-shaped pedestal 10 has an upper surface attached to the processing table 3 below. A workpiece 2 is fixed by a clamp 4, and the workpiece 2 moves according to the movement of the table 3 in the X and Y directions of the arrows.

Then, a laser beam is irradiated onto the workpiece 2 from the lower end of the processing head 1, and the processing table 3 is moved by an NC control device (not shown) according to an NC tape prepared in advance to cut, for example, a processing part 6.

(Problem to be Solved by the Invention) In such a laser processing device, when processing a workpiece 7 at a position close to the clamp 4, for example, depending on how the NC tape is made, the lower end of the processing head 1 may be placed close to the clamp 4.
Hitting the top of the head may cause the workpiece 2 to shift, or the machining head 1
There is a risk of damage.

Therefore, a method is used in which the movement of the processing table 3 in the Y direction is limited in advance to the limit line 5 in FIG. 3, but the yield of the workpiece 2 is reduced. Furthermore, when inserting the cut shape of the processed part 6 into the NC tape, it is sufficient to release it from the clamp 4, but this is troublesome in high-mix, low-volume production.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a laser processing apparatus that can effectively utilize a workpiece and that does not damage the machining pad, clamp, etc.

(Means and effects for solving the problem) The present invention provides a gate-shaped pedestal with a changeover switch that operates even when the NC table exceeds the limit line, and a lamp that lights up when the changeover switch is switched. In this laser processing device, only when processing a nearby workpiece, the changeover switch is turned on, the lamp is turned on, and the operator performs processing while confirming that the processing head does not come into contact with the clamp.

(Example) Hereinafter, an example of the laser processing apparatus of the present invention will be described with reference to FIGS. 1 and 2. By the way, explanation of the same parts as in Figure 3 will be omitted.

In FIG. 1, on one side of the gate-shaped pedestal 10, there is a changeover switch 8 that operates the XY table even if the limiting line 5 crosses the processing head 1 to the right side in FIG. 1 when the XY table moves in the Y direction. A red lamp 9 is attached to the top of the pedestal 10 and lights up when the changeover switch 8 is switched in that direction.
is installed.

In FIG. 2 showing the operation console, there is a feed hold indicator light 10 indicating that the output of the NC table and the laser excavator (not shown) will stop when the limit line 5 crosses to the right side of the processing head 1, and a feed hold indicator light 10 that indicates that the output of the NC table and the laser excavator (not shown) will be stopped. An operation restart switch 11 is attached.

Now, when processing the workpiece 6 with this laser processing device,
If the limit value 5 passes the processing head 1, the NC table and the laser excavator are placed in a field hold state, and the indicator light 10 is turned on to prevent damage to the processing head and the like. Then, when the operator confirms the positions of the workpiece 6 and the clamp 4 and determines that it is OK to continue machining, the operator switches the changeover switch 8 and turns on the operation restart switch 11, so that the workpiece head 1 and the clamp 4 are connected to each other. Machining while making sure that there is no interference.

Also, when machining the workpiece 7, the limiting line 5 crosses the workhead 1 and the indicator light 10 is lit, so work is carried out while confirming that the clamp 4 and workhead 1 do not interfere.

In this embodiment, the limiting line 5 is represented by a dotted line drawn on the workpiece 2, so it is necessary to use, for example, an optical method to detect this line. It may also be detected by contact with the processing head 1.

(Effects of the Invention) As described above, according to the laser processing apparatus of the present invention, a changeover switch and a signal lamp that operate the processing machine even if the NC table exceeds the limit line are provided on the mount, and the workpiece is close to the clamp that holds the processed part. Since the operator is careful to proceed with the machining only when machining the machined parts, it is possible to obtain a laser machining device that does not waste the workpiece and does not damage the machining rad or clamp.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a main part showing an embodiment of a laser processing device of the present invention, FIG. 2 is a partial perspective view of an embodiment of a laser processing device of the present invention, and FIG. 3 is a conventional laser processing device. FIG. 1... Processing head 2... Workpiece 3... Processing table 4... Clamp 5... Limiting line 8... Selector switch 9... Lamp 12... Operation console (8733) Agent Patent Attorney Yoshiaki Inomata (and 1 other person) Figure 1 Figure 2z Figure 3

Claims (1)

[Claims] A clamp that moves under NC control and fixes a workpiece on an XY table to the XY table; and a process that irradiates the workpiece with laser light transmitted from a laser oscillator attached to a pedestal on the XY table. In a laser processing device comprising a head and a means provided at the front end of the clamp for detecting the operating limit of the XY table, the XY table and the laser oscillator are restarted when the XY table is moved to the operating limit. A laser processing device comprising: a changeover switch for switching to startup; and a signal lamp that lights up when the changeover switch is switched to restart.