JPH0340471Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a teaching holder in a laser processing machine.

Prior Art In general, in laser machining, a teaching operation is performed before machining to memorize machining data such as a cutting trajectory of a workpiece. In this case, in a laser processing machine equipped with a head for both laser processing and teaching, a teaching holder is attached to the head in place of the laser processing holder, and the teaching stylus at the tip touches the workpiece from the normal direction to the workpiece processing surface. By tracing the marking lines on the top, the machining trajectory of the workpiece is read and stored in the NC device as machining data.

Then, remove this teaching holder from the head and attach the laser processing holder.
By starting machining, the head is controlled, for example, three-dimensionally, based on the stored machining data, and a predetermined machining is performed on the workpiece.

Conventionally, this type of teaching holder has a structure in which the teaching stylus is exposed from the tip of the holder body, so the sides of this thin stylus can approach the three-dimensional walls of the workpiece to a considerable extent. It was hot. Therefore, if the laser processing nozzle is moved based on this data, the diameter of the inverted conical nozzle is usually larger than the stylus, so the side part of the processing nozzle will collide with the three-dimensional wall of the workpiece. Sometimes. As a result, the nozzle may be damaged or the head main body may be affected, causing a malfunction, resulting in a problem that machining cannot be carried out smoothly.

Purpose of the invention The purpose of the invention is to provide a catch with the same shape as the machining nozzle at the tip of the teaching holder when directly teaching by tracing the machining trajectory of the workpiece. To reliably prevent interference between the machining nozzle and workpiece during machining by clearly understanding the relative positional relationship between the machining nozzle and the workpiece during machining, and teaching to prevent interference between the cap and the workpiece. It is in. Further, even if the cap is accidentally brought into contact with the workpiece during teaching, the workpiece will not be damaged, and the teaching stylus inside the cap can be seen through, thereby enabling more accurate teaching.

Structure of the invention Therefore, the present invention includes a teaching holder body made of a transparent elastic material that has the same external shape as the processing nozzle of the laser processing holder so as to surround the periphery of the teaching stylus, and that allows the stylus inside to be seen through. It is equipped with a removable elastic cap.

Embodiment FIG. 1 shows a teaching holder 1 of the present invention, and FIG. 2 shows a laser processing holder 2.

The teaching holder 1 has a laser head 3 which serves as a head for both laser processing and teaching.
It is removably attached to. That is, on the head 3 side, there is a mounting cylinder 4 having a mounting shoulder 4a on the lower end line.
A tightening nut 5 is rotatably engaged with the shoulder portion 4a of the cylindrical body 4. Further, a positioning pin 4b is protruded from the cylindrical body 4 at one location, and an engagement hole 6a is formed in the upper end surface of the teaching holder main body 6 to correspond to this positioning pin 4b. Further, a threaded portion 6b is formed on the outer periphery of the upper end of the holder main body 6 to be screwed into the nut 5.

Then, the holder main body 6 is fitted from below into the cylindrical body 4 on the side of the head 3, and the holder 1 is tightened by further tightening the nut 5 from above.
is positioned and fixed to the head 3.

Similarly to the teaching holder 1, the laser processing holder 2 also has an engaging hole 7a corresponding to the positioning pin 3b in the laser processing holder main body 7.
A threaded portion 7b is formed to be screwed into the nut 4, so that it can be attached to the head 3 in the same manner. This laser processing holder 2 has an optical lens 8 built into the holder body 7, an inverted conical processing nozzle 9 attached to the tip, and an elastic hose 13 for supplying assist gas, etc. to the side thereof. is connected.

On the other hand, the teaching holder main body 6 is
It is formed of a plurality of hollow cylinders, and a teaching stylus 10 is held on the center line thereof.

The stylus 10 is connected to an external receiver (not shown) for receiving positional information via a conductive wire 11 connected within the holder body 6.

Further, an elastic cap 12 is provided at the lower end of the holder main body 6 so as to surround the periphery of the stylus 10.
is attached removably. The elastic cap 12 has an inverted conical shape having the same external shape as the nozzle 9 of the laser processing holder 2, and is attached so that the tip of the stylus 10 slightly protrudes from the lower end opening 12a. The elastic cap 12 is made of a transparent or translucent elastic material so that at least the stylus 10 inside can be seen through. For example, it is made of synthetic rubber such as silicone rubber.

A hook protrusion 12b that protrudes inward is integrally formed on the upper end of the elastic cap 12, and a hook 6c is protruded from the lower end surface of the holder main body 6 in correspondence with the hook protrusion 12b. There is. That is, the cap 12 is easily hung by pushing the hook protrusion 12b of the elastic cap 12 into engagement with the hook 6c by elastic action.

Effects of the Embodiment When teaching a three-dimensional workpiece by attaching the teaching holder 1 to the head 3, the holder 1 is moved three-dimensionally to trace the marking line on the workpiece. At this time, by teaching so that the elastic cap covering the stylus 10 does not interfere with the three-dimensional wall of the workpiece on its side, the stylus 10 can be taught relative to the workpiece in the same way as when actually machining with a holder for laser processing. position can be observed.

In addition, since the elastic cap 12 is at least semi-transparent, the axis of the stylus 10 inside can be seen through, making it easy to check whether the holder 1 is positioned on the normal line to the workpiece machining surface. Teaching can be done. Further, even if the elastic cap 12 is brought into contact with a workpiece by mistake, the elastic deformation of the elastic cap 12 will not damage the workpiece or the head 3.

Further, conductive wires 11 and hoses 13 of holders 1 and 2 indexed and attached using positioning pins 4b.
are wired at approximately the same position with respect to the head 3, preventing interference between them and the workpiece, and conductive wire 11 and hose 13.
It is also possible to check the twisted state of the

After teaching, loosen the nut 5 from the head 3, pull out the teaching holder 1,
In place of this, laser processing can be started by positioning and mounting the laser processing holder 2 on the head 3 as shown in FIG.

Effects of the invention As described above, the teaching holder of the present invention is made of a transparent elastic material that has the same external shape as the nozzle of the laser processing holder so as to surround the teaching stylus at the tip, and allows the teaching stylus inside to be seen through. Equipped with an elastic cap, the teaching holder can be moved relative to the workpiece in the same way as when actually laser processing, thereby preventing collisions between the nozzle side and the workpiece due to overstroke during processing. can. Further, during teaching, even if the elastic cap comes into contact with the three-dimensional wall of the workpiece, the elastic deformation of the elastic cap will not damage the workpiece or the head.

Furthermore, since the internal teaching stylus can be seen through the elastic cap, it can be easily confirmed whether the axis of the teaching stylus is located on the normal line to the workpiece processing surface, allowing accurate teaching.

Further, the above-mentioned elastic cap can be easily attached by simply pushing and engaging the hooking protrusion of the elastic cap with the hooking claw of the holder main body.
If the elastic cap is deformed or damaged for some reason, it is extremely easy to replace, and it is also possible to replace the elastic cap according to the shape of the various nozzles used during processing.

[Brief explanation of the drawing]

FIG. 1 is a partially cut-away front view showing a teaching holder of the present invention, and FIG. 2 is a partially cut-away front view showing a laser processing holder. 1... Holder for teaching, 2... Holder for laser processing, 3... Dual-purpose head, 6... Holder body for teaching, 6c... Hook claw, 9...
...Nozzle, 10...Stylus for teaching,
12...Elastic cap, 12b...Hook protrusion.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a laser processing machine having a dual-purpose head in which a holder for laser processing and a holder for teaching can be replaced, a stylus for teaching is held at the tip and can be freely attached to and detached from the dual-purpose head. A teaching holder body that is attached to the teaching stylus is made of a transparent elastic material that has the same external shape as the nozzle provided on the laser processing holder so as to surround the periphery of the teaching stylus, and that allows the teaching stylus inside to be seen through. A holder for teaching in a laser processing machine, characterized by a removable elastic cap. (2) A utility model characterized in that the elastic cap is attached to the teaching holder body by pushing and engaging the hook protrusion provided on the elastic cap with the hook provided on the teaching holder body. A holder for teaching in a laser processing machine according to claim 1.