JPH0327753Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a laser processing torch that allows laser light and assist gas to pass through and sucks smoke generated from a workpiece.

<Prior art> Such a laser processing torch has a tapered inner torch that forms a path for passing laser light and assist gas, and an outer torch that is inserted into the inner torch to create a gap between the inner torch and the outer torch. An internal space was formed, this internal space was opened to the workpiece side, and the internal space was connected to a suction device.

<Problem to be solved by the invention> The above-mentioned laser processing torch is used to cut a workpiece made of ABS resin, and the smoke generated from the workpiece passes through the internal space and is sucked toward the suction device. . At this time, the tar contained in the smoke adheres to the walls of the internal space, and if left unattended, the suction effect will be reduced, so it is necessary to remove the tar after a certain period of time. When removing the torch and removing tar off-line, it is troublesome to attach the inner torch to a predetermined position so that the laser beam does not come into contact with it. On the other hand, if you leave only the inner torch and remove only the outer torch and clean it off-line, the inner torch must be cleaned on-line, making it difficult to remove tar.

<Means for solving the problem> The present invention was made to solve the above-mentioned problem, and the inner torch and the outer torch are arranged in a double structure, and the inner torch and the outer torch are formed between the inner torch and the outer torch. The internal space is opened to the workpiece side and connected to a suction device, and a cover is removably attached to the wall of the internal space so that it can be cleaned.

<Operation> The laser beam that has passed through the passage of the inner torch is irradiated towards the workpiece. The smoke generated from the workpiece is sucked into the internal space, and the tar contained in the smoke adheres to the cover. Tar removal is accomplished by removing the outer torch, removing the cover, and cleaning the cover off-line.

<Example> Hereinafter, an example of the present invention will be described based on the drawings. Reference numeral 10 denotes a lens holder that is moved in a three-dimensional direction by a robot (not shown), and a first passage 11 through which laser light passes is formed inside this lens holder 10. A light lens 12 is held.

A gas holder 20 is attached to the lower part of the lens holder 10, and an air cylinder 21 is attached to the gas holder 20.
A connecting fitting 23 is attached to connect a hose 22 from. Inside the gas holder 20, a second passage 24 is formed coaxially with the first passage 11, and a delivery passage 25 is formed which communicates the second passage 24 with the connecting metal 23.

A torch 30 for laser processing is attached to the lower part of the gas holder 20 via a bolt 31, and this torch 30 mainly consists of an inner torch 3 arranged in a double structure.
2 and an outer torch 33. The inner torch 32 has a tapered shape and has a third passage 34 formed therein coaxially with the second passage 24 . A first opening 35 communicating with the workpiece side is formed at one end of the third passage 34. The outer torch 33 includes a cylindrical portion 36 attached to the gas holder 20 and this cylindrical portion 3.
6 and a tapered conical portion 38 which is removably attached to the cylindrical portion 6 via a bolt 37. Conical part 38
Alternatively, a magnet may be provided and detachably attached to the cylindrical portion 36. An internal space 39 is formed between the inner torch 32 and the outer torch 33, and this internal space 39
A second opening 40 communicating with the workpiece side is formed on the lower side. A connecting pipe 41 is fixed to the outer torch 33, and a hose 42 is fitted into one end of the connecting pipe 41. Connection pipe 41
A suction passage 43 that communicates the upper part of the internal space 39 and the hose 42 is formed inside. One end of the hose 42 is connected to a suction device 45 via a filter 44.
It is connected to the.

A flexible Teflon cover 5 with a smooth surface is provided on the inner wall 50 and outer wall 51 forming the inner space 39.
2 is removably attached in the form of an inset. The Teflon cover 52 includes a first cover 53 fitted into the inner wall 50 of the cylindrical part 36, a second cover 54 fitted into the inner wall 50 of the conical part 38, and a Teflon cover 52 fitted into the outer wall 51 of the inner torch 32. It consists of a cover 55 that is hooked to a flange formed at the bottom or previously prevented from falling.
The cover 55 is removed by pushing apart the portion corresponding to the flange. Each cover has inner wall 50 and outer wall 5 with back glue attached to a part of the cover.
It may be attached to 1.

In addition, 60 is a laser oscillator that generates a laser beam, and 61 is a cutting process performed by the laser beam.
The workpiece is made of ABS resin.

Next, the operation will be explained based on the above-described configuration. The laser light emitted from the laser oscillator 60 passes through the first passage 11, the second passage 24, and the third passage 34.
During this process, the light is converged by the condenser lens 12 and becomes a spot light on the workpiece 61. cylinder 2
Air is sent out from 1 as an assist gas, and is sprayed onto the workpiece 61 through the second passage 24 and the third passage. The cutting of the workpiece 61 is facilitated by the blowing of air. Smoke generated when cutting the workpiece 61 is sucked into the internal space 39 through the second opening 40 and further suctioned toward the suction device 45 via the suction passage 43 and the hose 42 .
The tar contained in the smoke is covered with Teflon cover 52.
Attach to.

The tar removal operation is performed at certain intervals, and the removal operation involves separating the conical portion 38 from the cylindrical portion 36 and removing the Teflon cover 52 from the inner torch 32 and outer torch 33. Off-line, the tar adhering to the Teflon cover 52 is washed away using a detergent and dried. During this time, another Teflon cover 52 is fitted onto the inner torch 32 and outer torch 33, and the conical part 38 is attached to the cylindrical part 36.

In the above embodiment, only the conical part 38 was removed and the Teflon cover 52 was taken out. However, if the inner torch 32 and the outer torch 33 can be attached to the gas holder 20 with separate bolts, the outer torch 33 Alternatively, the entire body may be removed and the Teflon cover 52 may be taken out.

<Effects of the invention> As described above, the present invention has a structure in which the outer torch is removed from the inner torch and the cover is taken out for cleaning, making it easy to remove tar attached to the cover. There are advantages.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a laser processing torch according to the present invention. 30...Torch, 32...Inner torch, 33...
...outer torch, 36...cylindrical part, 38...conical part,
39...inner space, 43...suction passage, 45...
Suction device.

Claims (1)

[Scope of utility model registration request] This is a laser processing torch that passes laser light directed toward the workpiece from a condensing lens and also passes assist gas that is sprayed onto the workpiece, and includes an inner torch that is tapered and has a passage formed inside, and the surroundings of this inner torch. an outer torch which is removably arranged to form an internal space between the inner torch and the inner torch and which opens the inner space to the workpiece side; and a suction passage formed in the outer torch to connect the internal space and a suction device. and a cover that is removably attached to the wall of the internal space for cleaning.