JPH0337821Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a plasma processing machine, and more specifically, the present invention is related to a plasma processing machine, and more specifically, it is used to forcibly collect spatter or fume generated near a thermal insulation processing machine, and also to use a material gripping device. This invention relates to a plasma processing machine equipped with a detection device that prevents the plasma from coming close to the plasma torch.

[Technical background of the invention and its problems]

Conventionally, for example, in plasma processing machines, spatter or fumes generated during thermal cutting are collected in a dust box through a duct installed at the bottom of the workpiece, and there is no dust collection mechanism above the workpiece. was common.

However, spatter or fume is generated on the upper part of the workpiece during thermal cutting, and the spatter or fume is scattered and accumulated on an insulating member provided to insulate the plasma torch from the machine body.

As a result, there was a problem in that the torch body and the fuselage were not insulated, leading to damage to the torch body by the shot.

Also, cover the area around the plasma torch. There are some types that prevent spatter and fume from flying, but in this case, they tend to adhere to and accumulate on the torch body, resulting in a high incidence of problems.

Furthermore, there is a problem in that the plasma torch body and the material gripping device that grips the workpiece come into contact with each other, leading to damage to the equipment.

The purpose of the present invention was proposed in order to solve the problem in view of the above-mentioned circumstances.The purpose of the present invention is to provide a means for detecting the approach of a material gripping device to the cover surrounding the plasma torch body, and to prevent damage to the torch body. A dust collection port was installed inside the cover to discharge spatter or fume to the outside of the machine.

This prevents spatter or fume from accumulating on the torch body and insulating member, and prevents damage caused by shot between the torch body and the fuselage.
Another object of the present invention is to provide a plasma processing machine with an improved cooling effect on the torch body.

[Means to solve the problem]

The present invention has been proposed in order to achieve this object, and the workpiece W gripped by a material gripping device 21 that is movable back and forth and left and right with respect to the plasma torch 15 is moved. A plasma processing machine that performs plasma processing on a workpiece W with a plasma torch 15,
is vertically attached to the cutting head 13 via an insulating member 29 and a locking member 31, and a cover member 39 surrounding the plasma torch 13 is provided below the locking member 31 to prevent spatter or fumes generated during plasma processing from scattering to the outside. is provided, and the material gripping member 21 is provided on this cover member 39.
A detector 45 is provided on the side surface of the locking member 31 to detect when the insulating member 29 comes into close contact with the locking member 31.
A dust collection hole 51 is formed near the outer periphery of the cover member 31 to suck in spatter or fume scattered inside the cover member 31.
1 is characterized in that a suction pipe 55 for discharging to the outside is connected through a suction hole 53 provided in the lock member 31.

[Effect]

By employing the present invention, when the material gripping device 21 that grips the workpiece W comes into close contact with the cover member 39 surrounding the plasma torch 15, it is detected by the detector 45 provided on the side surface of the locking member 31. In addition, spatter and fumes generated during the thermal cutting process are prevented from scattering to the outside by the cover member 39 surrounding the plasma torch 13, and the dust collection hole 51 formed near the outer periphery of the insulating member 29 prevents spatter and fumes from being scattered outside.
The plasma torch 13 and the insulating member 29 are
This prevents build-up and further cools the plasma torch 13.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

Referring to FIG. 1, in a plasma processing machine 1 which is, for example, a thermal cutting machine, a cutting table 5 on which a workpiece W is placed on the upper part of a base 3 is shown.
is installed.

An L-shaped frame 11 formed by a vertical frame 7 and a horizontal frame 9 extends from the right end of the base 3.
A cutting head 13 is provided at the left end of the horizontal frame 9 to face the cutting table 5.

Although not shown, cutting head 1
3 and horizontal frame 9, an optical path guided by an optical resonator and emitted from a plasma discharge tube is incorporated, and the optical axis is located at or slightly below the surface of the workpiece W than the plasma torch 15. It is attached to focus on a point.

On the other hand, an X-axis carriage 19 that moves along an X-axis guide rail 17 provided in the X-axis direction (the direction that passes through FIG. , and one end of the workpiece W is gripped.

Further, a Y-axis guide rail 23 is provided for movement in the Y-axis direction (horizontal direction in FIG. 1), and a carriage base 24 equipped with the X-axis carriage 19 is mounted on this Y-axis guide rail 23 in the Y-axis direction. It is provided so that it can be moved in any direction. Therefore, the workpiece W can freely move in the X-Y axis directions.

A detection member 25, which is a detection means for detecting the approach of the material gripping device 21 and the plasma torch 15, is provided surrounding the plasma torch 15. A dust collection port is provided inside the detection member 25, and the dust collection The plasma processing machine 1 includes a dust collector 27 (partly not shown) that communicates with the mouth.

Next, an embodiment of the detection means and dust collection mechanism according to the present invention will be described in more detail with reference to FIG.

The workpiece W placed on the cutting table 5 is held at one end by a material holding device 21 and moved.

On the other hand, the plasma torch 15 is vertically installed on the cutting head 13 via an insulating member 29 and a lock ring 31, and a detection means is provided to prevent the material gripping device 21 from coming into close contact with the plasma torch 15.

The structure is such that a groove 37 formed by a step 33 provided on a lock ring 31 as a lock member fixed to the lower end of the cutting head 13 and a freebear bracket 35 fixed to this lock ring 31 with a fastener is attached to the cover. A bracket 41 on which a member such as a cylindrical cover 39 is suspended is mounted.

The inner peripheral edge of this bracket 41 and the lock ring 3
The stepped portion 33 provided at 1 is provided with a margin that allows for free movement.

Furthermore, a spatter shutter 43 is provided at the lower end of the cylindrical cover 39 to prevent spatter, fume, etc. generated during thermal cutting from scattering to the outside.

A plurality of detectors 45 (for example, limit switches, etc.) are attached to the outer peripheral surface of the lock ring 31,
The detection rod 47 of this detector 45 is connected to the bracket 41
It is fitted into an embossed part 49 provided on the abutting surface.

For this reason, the material gripping device 21 is attached to the cylindrical cover 39.
When it comes into contact with the plasma torch 15, the detection rod 47 of the detector 45 moves over the embossed part 49, thereby detecting the approach and preventing the plasma torch 15 from being damaged.

On the other hand, regarding the dust collection mechanism, a cylindrical cover 39 and a spatter shutter 43 prevent spatter, fume, etc. generated during thermal cutting from scattering to the outside.

However, as shown in section A in the figure, spatter and fume adhere to and accumulate on the base of the plasma torch 15 and the end face of the insulating member 29, easily causing a short circuit.

For this reason, a dust collection hole 51 is provided on the inner periphery of the freebear bracket 35 and the lock ring 31, and is communicated with a suction hole 53 provided on the side surface of the lock ring 31. Dust collector 29 installed outside the machine
Forcibly remove spatter, fume, etc.

The dust collection hole 51 is connected to the free bear bracket 35.
It is also possible to use the bolt hole in which the lock ring 31 is fastened.

Furthermore, due to the above-mentioned dust collection effect, the plasma torch 1
Cooling water is constantly circulating inside 5 to protect the internal O-ring etc. from heat.In addition, in the case of plasma, due to the thermal pinch effect, a condition related to arc convergence, the lower the ambient temperature, the higher the arc convergence rate. This improves cutting conditions.

In order to improve the cutting conditions, it is effective to forcibly discharge the hot air generated during thermal cutting using a dust collector.

It goes without saying that the present invention is not limited to the embodiments described above, and that various changes can be made without departing from the gist of the present invention.

[Effect of idea]

As can be understood from the description of the embodiments described above, in the present invention, when the material gripping device 21 comes into contact with the cover member 39 surrounding the plasma torch 15, the detector 45 provided on the side surface of the locking member 31 is activated. ,
It is possible to prevent contact with the plasma torch 15 and prevent damage to mutual members.

Further, a dust collection hole 51 is formed near the outer periphery of the insulating member 29 in the inside of the cover member 39 and in close proximity to the plasma torch 15 and the insulating member 29. Since a suction pipe 55 for discharging to the outside is connected, spatter, fumes, etc. generated during thermal cutting are forcibly discharged.

As a result, the insulating effect can be exhibited without spatter, fume, etc. being deposited and accumulated on the insulating member 29, and damage to the plasma torch 15 due to shoots can be prevented.
The effect of cooling can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a side view of a plasma processing machine according to an embodiment of the present invention, and FIG. 2 is a sectional view of the vicinity of a plasma torch showing a detection means and a dust collection mechanism according to the present invention. Explanation of the symbols representing the main parts of the drawing, 1...
Plasma processing machine, 15...Plasma torch, 21
...Material gripping device, 25...Detection member, 29...
Dust collector, 29...Insulating member.

Claims (1)

[Scope of utility model registration request] A plasma processing machine that moves a workpiece W gripped by a material gripping device 21 that is movable back and forth and left and right with respect to a plasma torch 15, and performs plasma processing on the workpiece W with the plasma torch 15. , the plasma torch 15 is connected to an insulating member 29
In addition, a plasma torch 1 is installed vertically on the cutting head 13 via a locking member 31, and is installed below the locking member 31 to prevent spatter or fumes generated during plasma processing from scattering to the outside.
A cover member 39 surrounding the locking member 31 is provided, and a detector 45 for detecting that the material gripping member 21 has come into close contact with the cover member 39 is connected to the locking member 31.
A dust collection hole 51 is formed near the outer periphery of the insulating member 29 to suck in spatter or fume scattered within the cover member 31, and a dust collection hole 51 is provided in the lock member 31 in the dust collection hole 51. A plasma processing machine characterized in that a suction pipe 55 for discharging to the outside is connected through a suction hole 53.