JPH0625357U - Plasma wire spray torch - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] The present invention relates to improvement of a plasma wire spraying torch used for plasma spraying performed by transferring plasma to a spray wire. [Structure] The unit body of the wire spraying unit has a dogleg-shaped outer rectangular body, a plasma torch is supported on an upper front portion of the unit, and a wire feed guide for a spraying wire is supported on a lower front portion thereof. Is. [Effect] The plasma wire spraying torch itself is effective in terms of workability during manufacture and ease of use.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a torch for plasma wire spraying, which is used in plasma spraying performed by transferring plasma to a spray wire.

[0002]

[Prior art]

 In this type of plasma wire spraying, the plasma arc is transferred to this spraying wire while it is being fed, atomized air is used to atomize, and this is sprayed toward the workpiece to form a sprayed coating. Is. FIG. 6 shows a torch for plasma wire spraying of this type used for this, and is a form in which a wire spraying unit is added to a general plasma processing torch. In the figure, 1 is a plasma processing torch part, and 2 is a wire spraying unit part. The plasma processing torch unit 1 includes a torch head 11, a torch body 12, a torch cable 13, a torch switch 14, and the like. The wire spraying unit 2 is composed of a unit body 2a, a wire feeding guide unit 3, an atomizing air supply unit 4, and the like. The wire feeding guide portion 3 is composed of a wire chip 3a, a chip adapter 3b, a wire guide 3c, etc., and is properly screwed to the unit body 2a at the tip adapter 3b. Then, a plasma arc 9 is generated in an atmosphere of nitrogen gas 8 or the like by the output of a DC power source (not shown) having an electrode as a cathode and the spray wire 7 as an anode, and the spray wire 7 is fed. Plasma spraying is performed. The thermal spray wire 7, which is appropriately wound on a wire reel (not shown) or the like, is supplied from the wire tip 3a through the wire guide 3c. Then, the spray wire 7 is melted by the plasma arc 9 and atomized by the atomizing air 10 to form a spray coating on the workpiece. The atomizing air 10 is appropriately supplied with compressed air from the atomizing air supply unit 4, circulates in the unit body 2a, and is ejected from the air ejection hole 2b toward the tip of the plasma arc 9.

By the way, the unit main body of the conventional plasma wire spraying torch of this type has a substantially cylindrical outer shape in any case. As a result, the workability of each part was poor and the cost was high, and there were problems in terms of operability and maintenance.

[Problems to be solved by the device]

 The present invention aims to reduce the cost of the torch as a whole by improving the processability of the unit body of this type of plasma wire spraying torch, and simplifying the handling or operating when replacing parts. It is to provide a plasma wire spraying torch that is more effective in terms of performance and maintenance.

[0004]

[Means for Solving the Problems]

 SUMMARY OF THE INVENTION In order to solve the problems of the prior art, the present invention is, firstly, in a plasma wire spraying torch performed by transferring plasma to a spraying wire, the shape seen from the left side surface with respect to the front surface is approximately a letter shape. A unit body formed by a rectangular outer shape that relatively supports the plasma torch on the upper front surface of the dogleg shape and supports the wire feed guide part for the sprayed wire on the lower front surface of the dogleg shape. It is characterized by having.

A second aspect of the present invention is characterized in that the wire tip of the wire feeding guide portion is supported via an eccentric adapter.

A third aspect of the present invention is to provide a handle on the front surface of the upper part of the unit main body, which, together with the lower end ridge of the dogleg shape of the unit main body, serves as a protector for the wire chip and a receiver. Is characterized by.

A fourth aspect of the present invention is characterized in that a light shielding plate is provided on the front surface of the upper portion of the unit body.

[0008]

[Action]

 Since the plasma wire spraying torch of the present invention has a unit body formed of a rectangular outer shape, it can be easily machined from a square bar unlike a cylindrical body. In addition, the directivity of the sprayed wire can be easily adjusted with an eccentric adapter. The handle can be used not only for moving the torch, but also as a torch suspension, and by attaching a light shielding plate, work can be performed while observing the arc light of the plasma arc.

[0009]

【Example】

 Next, an embodiment of the present invention will be described with reference to FIGS. The same reference numerals are used for the parts that are the same as those in FIG. 6 described above. First, in FIG. 1 and FIG. 2, 1 is a plasma processing torch part, and 21 is a wire spraying unit part of the essential part of the present invention. The plasma processing torch unit 1 is the same as the conventional one, and includes a torch head 11, a torch body 12, a torch cable 13, a torch switch 14, and the like. The plasma processing torch unit 1 is a generally used plasma processing torch. An electrode 15, a plasma chip 16 on the outer side of the electrode 15, a chip holder 17 for supporting the electrode 15, etc. are provided at the tip 11a of the torch head 11. Is provided. The wire spraying unit portion 21 includes a unit body 22, a wire feeding guide portion 31 supported by the unit body 22, an atomizing air supply portion 41, an insulator 23, an air ring 24, and a tightening ring 25. ing. In addition, 6 is a handle.

The first aspect of the present invention is that the unit main body 22 has a shape in which a vertical rectangular plate body is bent forward, and the shape viewed from the left side surface with respect to the front surface 22a is almost the same. That is, it is formed by a letter-shaped angular body. A circular hole portion 22b for supporting the torch head 11 is provided on the front surface 22a, and a guide hole 22c for supporting the wire feeding guide portion 31 at its tip portion is provided on the lower portion of the front surface 22a. Further, a through hole 22d for fixing the tip of the supported wire feeding guide portion 31 is provided from one lower side surface to the guide hole 22c. Then, the insulator 23 is fitted into the circular hole portion 22b of the unit main body 22, and the distal end portion 11a of the torch head 11 is fitted into the circular hole portion 23a provided in the insulator 23, and this is tightened. With the attached ring 25, the unit main body 22 is screwed together with the screw portions 25a and 22e to be integrated. Further, an air ring 24 is screwed to the tip holder 17 by mutually threaded portions 17a and 24a. The wire feeding guide section 31 is composed of a wire chip 32, a chip adapter 33, a wire guide 34, and the like. The chip adapter 33 supports the guide hole 22c of the unit main body 22 and fixes the support bolt 5 that is screwed into the through hole 22d. Further, a wire tip 32 is supported on the front portion of the tip adapter 33 by their mutual screw portions 32a and 33a, and a wire guide 34 is inserted on the rear portion thereof and engaged with its inner hole 33b. The atomizing air supply unit 41 is provided below the other end of the through hole 22d of the unit body 22. This is pipe-shaped, and forms a passage that passes through the inside of the unit main body 22 and is formed by the unit main body 22 which is a part of the circular hole portion 22b and the insulator 23 and reaches the air chamber 42.

A second aspect of the present invention is that, as shown in FIG. 3, the wire feed guide portion 31 is provided with an eccentric adapter 35 in place of the tip adapter 33. The eccentric adapter 35 is provided with a screw portion 35a for supporting the tip 32 and an eccentric hole 35b for engaging with the wire guide 34 so as to be eccentric with respect to the axial center. The unit body 22 is rotatably fitted in the guide hole 22c. Therefore, by appropriately rotating the eccentric adapter 35, the thermal spray wire 7 can be moved in the direction of the arrow, and the target position for the plasma arc 9 can be determined. Then, as shown in FIG. 1, it is fixed to the unit main body 22 with the support bolts 5.

A third aspect of the present invention is that, as shown in FIG. 4, the handle 61 provided at the upper end of the front surface 22a of the unit main body 22 is effective as a protective portion for the wire tip 32. The length 1 of the handle 61 is set so that the tip 32c of the wire tip 32 does not protrude from the line connecting the tip 61a of the handle 61 and the ridge line 22g protruding forward of the unit body 22. That is what I did. Therefore, the front surface 22a of the unit main body 22 can be used as a receiving portion when it is placed downward.

A fourth aspect of the present invention is to provide a light shielding plate 62 at the upper end of the front surface 22a of the unit body 22 as shown in FIG.

As described above, the torch for plasma wire spraying according to the present invention is operated through the plasma chip hole 16a by the output of the DC power supply (not shown) having the electrode 15 as the negative electrode and the spray wire 7 as the anode. A plasma arc 9 is generated in the atmosphere of the delivered nitrogen gas 8 or the like to melt the thermal spraying wire 7 fed from the wire tip hole 32b of the wire tip 32 and supplied from the atomizing air supply section 42. Plasma spraying is performed while atomizing the spray wire 7 with atomizing air 10 ejected from an air ejection hole 23b provided in the insulator 23 through an air chamber 43 formed by the unit body 22 and the insulator 23. . At this time, if the target position of the thermal spray wire 7 with respect to the plasma arc 9 is misaligned, it can be adjusted by rotating the eccentric adapter 35.

As described above, one of the plasma wire spraying torches of the present invention is that the unit body has a square V-shaped outer shape, and then the chip adapter is used. The eccentric adapter was used, and the handle was also used as a protective part for the wire tip. Furthermore, a light shielding plate is provided.

[00016]

[Effect of device]

 Since the plasma wire spraying torch of the present invention has a square V-shaped outer body as the unit body, unlike the conventional cylindrical body, it has excellent workability not only in the outer shape but also in each part. Next, by adopting an eccentric adapter for the wire feeding guide part, by rotating this, it is possible to easily adjust the directivity of the sprayed wire with respect to the plasma arc. In addition, by considering the position that connects the front of the handle and the ridgeline of the unit body, this handle can be used not only for carrying, but also as a protection part for the wire tip when it is used as a hanging tool or placed. By providing them, there are some excellent effects such as being able to work while observing the arc light.

[00017]

[Brief description of drawings]

1 is a perspective view of the present invention

FIG. 2 is a sectional view of the main part of the present invention.

FIG. 3 is a right side view of a partial cross section according to a second embodiment of the present invention.

FIG. 4 is a right side view according to the third embodiment of the present invention.

FIG. 5 is a perspective view of an essential part according to a fourth embodiment of the present invention.

FIG. 6 is a perspective view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Plasma processing torch part 21 Wire spraying unit part 22 Unit main body 23 Insulator 24 Air ring 25 Tightening ring 31 Wire feeding guide part 32 Wire chip 33 Chip adapter 35 Eccentric adapter 41 Atomizing air supply part 43 Air chamber 61 Handle 62 Light shield

Claims (4)

[Scope of utility model registration request] 1. In a torch for plasma wire spraying performed by transferring plasma to a spray wire, the shape viewed from the left side with respect to the front surface is approximately a character, and the upper front surface of the dogleg-shaped body is formed. It is characterized in that it is provided with a unit main body formed of a rectangular outer shape, which relatively supports the plasma torch, and supports a wire feeding guide portion for the sprayed wire at the lower front surface of the dogleg shape. Torch for plasma wire spraying. 2. The wire tip of the wire feeding guide part,
The torch for plasma wire spraying according to claim 1, wherein the torch is supported via an eccentric adapter. 3. A handle is provided on the upper front surface of the unit main body, which is combined with the lower edge line of the dogleg shape of the unit main body,
The torch for plasma wire spraying according to claim 1 or 2, wherein the torch is a protection part for the wire chip and a receiving part. 4. The plasma wire spraying torch according to claim 1, wherein a light shielding plate is provided on the front surface of the upper portion of the unit body.