JP4689303B2 - Arc spray gun - Google Patents

Description

  The present invention relates to an improved arc spray gun for an arc spray apparatus for performing thermal spraying effective for rust prevention and corrosion prevention treatment of electrical equipment, large steel structures and the like.

  In arc spraying, two wire rods are fed to two contact tips of an arc spray gun, respectively, an arc is generated between the tips of the two wire rods, and the wire rod is melted by arc heat. This is a thermal spraying method in which molten metal is refined by spraying compressed gas or the like, and sprayed onto a sprayed material while a wire is fed in accordance with the melting rate, thereby forming a thermal spray coating.

  FIG. 4 is a diagram showing a configuration of a general arc spraying apparatus, and FIG. 5 is a cross-sectional view of a conventional arc spray gun. In FIG. 4, the thermal spraying power supply device 1 is supplied with electric power to the arc spraying gun 2 by using a commercial power supply as an input, the output of which is controlled at a constant voltage by an inverter control circuit, for example. The compressed gas ejected from the compressor 3 passes through an electromagnetic valve (not shown) provided in the thermal spray power supply device 1 and is ejected to the arc spray gun 2.

  The arc spraying apparatus includes a first wire rod feeding mechanism and a second wire rod feeding mechanism. First, the first wire feeding mechanism will be described. The first push-side wire rod feeder 4a sends out the first wire rod from the first wire rod reel 5a. The delivered first wire is guided to the arc spray gun 2 by the first push side guide liner 8a. The spraying voltage and the wire feeding speed are set by the remote controller 6.

  In the arc spray gun 2 shown in FIG. 5, the first pull-side wire feeder 9a is attached to the gun body 10, and is guided by the first push-side guide liner 8a shown in FIG. The wire 11a is fed into the gun body 10. The 1st guide liner 12a consists of flexible materials, such as resin, and the penetration hole 121a of the 1st wire 11a is formed in the axial center part. Further, the outer surface of the base end portion 122 a is threaded, and is inserted into the gun body 10 and screwed to the gun body 10. The first guide liner 12a guides the first wire 11a delivered from the first pull-side wire feeder 9a to a first contact chip 16a described later.

  The insulating member 13 is attached to the gun body 10. The first power supply member 14 a has a first guide liner insertion hole 141 a formed in the shaft core portion, and is attached to the insulating member 13. The first chip body 15a has an insertion hole 151a for the first wire 11a formed in the shaft core portion, and a liner insertion hole 152a into which the first guide liner 12a is inserted in the base end portion 153a. Yes. Further, the outer surface of the base end portion 153a of the first chip body is threaded, and is screwed to the first power supply member 14a.

  The first guide liner 12a is bent toward the central axis B of the gun body 10, and the tip end portion 123a is inserted through the insulating member 13 and the first power supply member 14a, and the first chip body 15a. Has been inserted. In the first contact chip 16a, an insertion hole 161a through which the first wire 11a is inserted is formed in the shaft core portion. Further, the outer surface of the base end portion 162a of the first contact chip is threaded and is screwed to the first chip body 15a. Electric power is supplied from the first power supply member 14a to the first contact chip 16a through the first chip body 15a, and the first wire 11a is inserted into the first contact chip 16a to be in contact with the inside. Is done.

  The first contact chip 16a and the first chip body 15a may be integrated electrodes. However, the electrode is easily consumed by energization, and in particular, the tip portion is more easily consumed. In view of this, the electrode is divided into the first chip body 15a and the first contact chip 16a, and the first contact chip 16a is screwed to the first chip body 15a. Only the contact tip 16a can be exchanged.

  In order to maintain the quality of the coating formed by arc spraying, it is always necessary to generate a stable arc. For that purpose, it is necessary to suppress the speed fluctuation | variation which supplies the 1st wire 11a. The speed fluctuation is mainly caused by a change in the frictional resistance caused by the contact between the first wire rod 11a and the first guide liner 12a or the first contact tip 16a, or the first guide liner accompanying the change in the frictional resistance. This is caused by the fluctuation of the first wire 11a on the inner surface of 12a or the first contact chip 16a. In particular, it occurs when the first wire 11a comes into strong contact with a portion that changes the traveling direction in which the first wire 11a is fed, or at the end of the first guide liner 12a or the first contact chip 16a. Therefore, in order to reduce the frictional resistance when the first wire 11a is inserted through the first guide liner 12a, the first guide liner 12a is formed of a flexible material such as a resin and bent gently. Yes.

  The first guide liner 12a, the first tip body 15a, and the first contact tip 16a are fed in the direction of the intersection A where the first wire 11a intersects the second wire 11b in front of the arc spray gun. Installed as done. The nozzle 17 has a gas ejection hole 171 for ejecting the compressed gas 18 supplied from the compressor 3 shown in FIG.

  Second wire rod reel 5b of second wire rod feeding mechanism, second push side wire rod feeder 4b, second push side guide liner 8b, second pull side wire rod feeder 9b, second wire rod 11b, the second guide liner 12b, the second power supply member 14b, the second chip body 15b, and the second contact chip 16b have the same functions as those of the first wire feeding mechanism described above. Subscript a is replaced with b, and the description is omitted. The first wire 11a and the second wire 11b are insulated and fed to the intersection A. (For example, refer to Patent Document 1).

The operation will be described below.
When the operator presses the start switch 7 provided on the arc spray gun 2 shown in FIG. 4 to turn it on, a solenoid valve in which the compressed gas 18 from the compressor 3 is provided in the thermal spraying power supply device 1 (not shown). And is ejected to the arc spray gun 2. In the first wire rod feeding mechanism, the first wire rod 11a from the first wire rod reel 5a is fed by the first push side wire rod feeder 4a, and then by the first push side guide liner 8a. Guided and fed to the arc spray gun 2.

  The first wire 11a guided by the first push side guide liner 8a is fed into the gun body 10 by the first pull side wire feeder 9a shown in FIG. The first wire 11a is guided to the first contact chip 16a by the first guide liner 12a. When the first wire 11a comes into internal contact with the first contact chip 16a, electric power is supplied from the first power supply member 14a to the first wire 11a via the first chip body 15a. Then, the first wire 11a is fed in the direction of the intersection A.

  In the second wire rod feeding mechanism, the second wire rod 11b from the second wire rod reel 5b is fed to the second contact chip 16b in the same manner as the first wire rod feeding mechanism. By doing so, electric power is supplied to the 2nd wire 11b from the 2nd electric power feeding member 14b. Then, when the first wire 11a and the second wire 11b are short-circuited at the intersection A in front of the arc spray gun 2, an arc is generated between the tips of the two wires 11a and 11b.

  Since the tips of the two wires 11a and 11b are melted by the arc heat, the wire can be continuously fed and the arc can be maintained by selecting an appropriate spray voltage and wire feed speed. it can. At this time, when the compressed gas 18 supplied from the compressor 3 is blown from the gas ejection hole 171 of the nozzle 17 to the arc between the tips of the two wires 11a and 11b, the molten metal is ejected forward as a droplet. And deposited on the object to be sprayed to form a sprayed layer.

Then, when the spraying is finished, when the operator opens the start switch 7 of the arc spray gun 2 to turn it off, the ejection of the compressed gas 18 is stopped and the two wires 11a and 11b are fed. And the energization of the spraying current is stopped and the spraying is finished.
Japanese Patent Laid-Open No. 10-314626

  As described above, the first guide liner 12a of the first wire feeding mechanism in the arc spray gun 2 of the prior art shown in FIG. 5 is made of a flexible material such as resin, and the base end portion 122a The outer surface is threaded and inserted through the gun body 10 and screwed to the gun body 10. The guide liner 12a is bent toward the central axis B of the gun body 10, and the tip 123a is inserted through the insulating member 13 and the first power supply member 14a, so that the first guide liner 12a It is simply inserted into the liner insertion hole 152a of the first chip body having an inner diameter slightly larger than the outer diameter.

  Thus, since the first guide liner 12a is bent in a curve and attached to the gun body 10, the frictional resistance is larger than when the first wire 11a is guided linearly. It is prone to wear and scratches and needs to be replaced frequently. However, since the base end portion 122a of the first guide liner is screwed to the gun body 10, it takes time to remove and attach and takes time to replace.

  If the difference between the outer diameter of the first guide liner 12a and the inner diameter of the first tip body 15a is too large, the shaft core of the tip portion 123a of the first guide liner and the first tip body 15a are screwed. The displacement of the stopped first contact tip 16a from the axis becomes large. As a result, the first wire 11a delivered from the first guide liner 12a is rubbed abnormally at the insertion portion of the first contact chip 16a. Therefore, a large amount of chips are generated, the frictional resistance is increased, and the fluctuation is increased. Furthermore, the first wire 11a cannot be stably fed. As a result, a uniform film cannot be formed, and the quality is significantly reduced.

  On the other hand, if the difference between the outer diameter of the first guide liner 12a and the inner diameter of the first tip body 15a is too small, the axis of the tip 123a of the first guide liner and the axis of the first contact tip 16a The deviation from the core is reduced, the first wire 11a delivered from the first guide liner 12a is less likely to rub at the insertion portion of the first contact tip 16a, the frictional resistance is reduced, and the chip Occurrence is reduced. However, it becomes difficult to insert the tip end portion 123a of the first guide liner into the first chip body 15a or to remove it from the first chip body 15a, which takes time for the replacement work. Furthermore, the processing accuracy of the first guide liner 12a and the first chip body 15a is also required, which is expensive. The second wire rod feeding mechanism has the same problem as the first wire rod feeding mechanism.

  The present invention makes it possible to easily remove and attach the guide liner, reduce the time required for the replacement work, and further reduce the wire feeding resistance to stably feed the wire. An object of the present invention is to provide an arc spray gun that can form a uniform film and can significantly improve the quality.

In order to achieve the above object, the first invention provides:
The gun body,
A first wire feeder that is attached to the gun body and feeds the first wire;
A first guide liner that guides the first wire fed from the first wire feeder to the proximal end of the first electrode;
The first electrode for supplying power to the first wire;
A second wire feeder for feeding a second wire attached to the gun body and insulated from the first wire;
A second guide liner that guides the second wire fed from the second wire feeder to the proximal end of the second electrode;
In the arc spray gun comprising the second electrode for supplying electric power to the second wire,
An insertion hole of the first wire rod is formed in the first wire rod feeding portion of the first wire rod feeder, and the first wire rod feeding portion side of the first wire rod feeder is formed. A first liner holding member having a tapered portion formed on the inner surface on the opposite side,
The proximal end portion of the first guide liner is inserted into the tapered portion of the first liner holding member,
A tapered portion is formed on the inner surface of the base end portion of the first electrode,
A tip portion of the first guide liner is inserted into the tapered portion of the first electrode;
Both ends of the first guide liner are inserted into a bow shape between the tapered portion of the first liner holding member and the tapered portion of the first electrode, respectively, and the repulsive force The both end portions are made of a flexible material that is pressed and supported by the tapered portion of the first liner holding member and the tapered portion of the first electrode, respectively.
An insertion hole for the second wire rod is formed in the second wire rod feeding portion of the second wire rod feeder, and the second wire rod feeding portion side of the second wire rod feeder is formed. A second liner holding member having a tapered portion formed on the inner surface on the opposite side,
A base end portion of the second guide liner is inserted into the tapered portion of the second liner holding member;
A tapered portion is formed on the inner surface of the base end portion of the second electrode,
A tip portion of the second guide liner is inserted into the tapered portion of the second electrode;
Both end portions of the second guide liner are inserted into a bow shape between the tapered portion of the second liner holding member and the tapered portion of the second electrode. An arc spray gun characterized in that both end portions are made of a flexible material pressed against and supported by the tapered portion of the second liner holding member and the tapered portion of the second electrode, respectively. .

The second invention is
Tapered portions are formed on the outer surfaces of the both end portions of the first guide liner according to the first invention,
An arc spray gun characterized in that tapered portions are formed on outer surfaces of the both end portions of the second guide liner.

  The arc spray gun of the first invention includes two sets of wire rod feeding mechanisms in the gun body. Each wire feeding mechanism includes a wire feeder that feeds the wire, a guide liner that guides the sent wire to the base end of the electrode, an electrode that supplies power to the wire, and a wire feeder. A liner holding member is provided in the wire feeding section, the wire insertion hole is formed, and a taper portion is formed on the inner surface opposite to the wire feeding section side of the wire feeding machine. The proximal end portion of the guide liner is inserted into the tapered portion, the tapered portion is formed on the inner surface of the proximal end portion of the electrode, and the distal end portion of the guide liner is inserted into the tapered portion. Further, both ends of the guide liner are respectively inserted so as to form a bow shape between the two tapered portions, and both ends are pressed against and supported by the two tapered portions by the repulsive force. Made of flexible material.

As a result, since the base end portion of the guide liner is not screwed to the gun body as in the prior art, the guide liner can be easily removed and attached, and the time required for replacement can be reduced. . Furthermore, the axial center of the tip portion of the guide liner and the axial center of the contact chip can be made to coincide. As a result, the wire rod fed from the guide liner is not rubbed abnormally at the contact chip insertion portion, the generation of chips can be remarkably reduced, and the feeding resistance of the wire rod can be reduced. Further, the guide liner has a gentle bow shape, and an increase in the wire feeding resistance can be suppressed. Therefore, the wire can be fed stably, a uniform film can be formed, and the quality can be remarkably improved.
Furthermore, since the guide liner can be easily manufactured simply by cutting both end surfaces, it can be manufactured at low cost.

  In the arc spray gun of the second invention, in addition to the arc spray gun of the first invention, tapered portions are formed on the outer surfaces of both end portions of the guide liner.

  As a result, in addition to the effect exhibited by the arc spray gun of the first invention, the shaft core of the base end portion of the guide liner and the shaft core of the liner holding member can be matched with higher accuracy, and The axis of the tip of the guide liner and the axis of the contact tip can be matched with higher accuracy. Accordingly, the wire can be fed more stably, a uniform film can be formed, and the quality can be remarkably improved.

[Embodiment 1]
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described based on examples with reference to the drawings. The feeding of wire to the arc spray gun, the supply of electric power and the supply of compressed gas are the same as those in the prior art shown in FIG. This will be described below.

  FIG. 1 is a cross-sectional view of an arc spray gun 23 according to Embodiment 1 of the present invention. In the figure, the first pull-side wire feeder 9a of the first wire-feeding mechanism is attached to the gun body 10 and guided by the first push-side guide liner 8a shown in FIG. The first wire 11 a is fed into the gun body 10. The 1st liner holding member 19a is provided in the sending part of the 1st wire rod 11a of the 1st wire rod feeder 9a. Further, an insertion hole 191a for the first wire 11a is formed in the shaft core portion, and a first guide liner is provided on the opposite side of the first wire 11a from the feeding portion side of the first pull-side wire feeder 9a. A liner insertion hole 192a into which 20a is inserted is formed, and a tapered portion 193a is formed on the inner surface thereof.

  The 1st guide liner 20a consists of flexible materials, such as resin, and the penetration hole 205a of the 1st wire 11a is formed in the axial center part. The base end portion 201a is inserted into the tapered portion 193a of the first liner holding member. The first guide liner 20a guides the first wire 11a fed from the first wire feeder 9a and inserted through the first liner holding member 19a to the base end portion 211a of the first chip body. To do.

  The insulating member 13 is attached to the gun body 10. The first power supply member 14 a is attached to the insulating member 13 with an insertion hole 141 a of the first guide liner 20 a formed in the shaft core portion. In the first chip body 21a, an insertion hole 212a for the first wire 11a is formed in the shaft core portion. Further, a liner insertion hole 213a into which the first guide liner 20a is inserted is formed in the base end portion 211a, and a tapered portion 214a is formed on the inner surface thereof. Further, the outer surface of the base end portion 211a is threaded, and is screwed to the first power supply member 14a.

  The first guide liner 20a is made of a flexible material and is bent toward the central axis B side of the gun body 10, and the distal end portion 202a is inserted through the insulating member 13 and the first power supply member 14a to be the first. Is inserted into the tapered portion 214a of the chip body. The length of the first guide liner 20a is slightly smaller than the length along the shaft core portion when the first wire 11a is inserted between the first liner holding member 19a and the first chip body 21a. To be long. For this purpose, the first guide liner 20a has both ends 201a and 202a formed in a bow shape between the tapered portion 193a of the first liner holding member and the tapered portion 214a of the first electrode. The both ends 201a and 202a are pressed against and supported by the tapered portion 193a of the first liner holding member and the tapered portion 214a of the first electrode by the repulsive force.

  When replacing the first guide liner 20a, in order to facilitate insertion and removal, the outer diameter of the first guide liner 20a, the inner diameter of the insertion port of the tapered portion 193a of the first liner holding member, and the first The difference from the inner diameter of the insertion opening of the taper portion 214a of the chip body 1 is preferably about 0.1 mm to 0.2 mm, for example.

  The first contact chip 16a is formed with an insertion hole 161a through which the first wire 11a is inserted in the shaft core part, and the outer surface of the base end part 162a is threaded. It is screwed. Electric power is supplied from the first power supply member 14a to the first contact chip 16a via the first chip body 21a, and the first wire 11a is inserted through the inner contact to be energized.

  The first guide liner 20a, the first tip body 21a, and the first contact tip 16a are fed in the direction of the intersection A where the first wire 11a intersects the second wire 11b in front of the arc spray gun 2. Installed as done. The nozzle 17 has a gas ejection hole 171 for ejecting the compressed gas 18 supplied from the compressor 3 shown in FIG.

  Second pull-side wire feeder 9b, second liner holding member 19b, second guide liner 20b, second power supply member 14b, second tip body 21b, second of the second wire feeder Since the contact chip 16b has the same function as the first wire feeding mechanism described above, the subscript “a” is replaced with “b”, and the description is omitted.

  The operations of feeding the wire to the arc spray gun 23, supplying electric power, and supplying compressed gas are the same as those in the prior art shown in FIG. The operation will be described below with reference to FIG.

  In the first wire rod feeding mechanism, the first wire rod 11a guided by the first push side guide liner 8a shown in FIG. 4 is fed into the gun body 10 by the first pull wire rod feeder 9a. Be paid. Then, the first wire 11a is inserted through the first liner holding member 19a and guided to the first contact chip 16a by the first guide liner 20a. When the first wire 11a comes into internal contact with the first contact chip 16a, power is supplied from the first power supply member 14a via the first chip body 21a. Then, the first wire 11a is fed in the direction of the intersection A with the second wire 11b.

  In the second wire feeding mechanism, the second wire 11b guided by the second guide liner 20b is brought into internal contact with the second contact chip 16b in the same manner as the first wire feeding mechanism. , Power is supplied. Then, when the first wire 11a and the second wire 11b are short-circuited at the intersection A in front of the arc spray gun 23, an arc is generated between the tips of the two wires 11a and 11b.

  Next, how to attach and remove the two guide liners 20a and 20b will be described. First, when attaching the first guide liner 20a, the base end portion 201a of the first guide liner is attached to the first tip body 21a in a state where the first chip body 21a is removed from the first power supply member 14a by loosening the screw. Is inserted into the liner insertion hole 192a of the first liner holding member. Then, the first chip main body 21a is screwed into the first power supply member 14a in a state where the tip end portion 202a of the first guide liner is inserted into the liner insertion hole 213a of the first chip main body.

  At this time, the base end portion 201a of the first guide liner is inserted along the tapered portion 193a of the first liner holding member by the repulsive force of the first guide liner 20a, and the base end portion of the first guide liner 20a is inserted. The axis of the end portion 201a coincides with the axis of the first liner holding member 19a. The tip portion 202a of the first guide liner is inserted along the tapered portion 214a of the first chip body, and the axis of the tip portion 202a of the first guide liner and the shaft of the first chip body 21a are inserted. The core matches. When the first chip body 21a is screwed into the first power supply member 14a, the first guide liner 20a has a bow shape due to its flexibility. Then, the first contact tip 16 a is screwed to the first tip body 21 a and the nozzle 17 is attached to the gun body 10.

  Next, when removing the first guide liner 20a, the nozzle 17 is removed from the gun body 10, the first contact tip 16a is removed from the first tip body 21a by unscrewing, and the first tip body 21a is removed. A screw is loosened and removed from the first power supply member 14a. Then, the first guide liner 20a is pulled out. The second guide liner 20b can be attached and removed in the same manner as the first guide liner 20a.

  As a result, the base end portions 201a and 201b of the two guide liners are not screwed to the gun body 10 as in the prior art, so that the guide liners 20a and 20b can be easily removed and attached. Work time can be reduced.

  Furthermore, the axial cores of the tip portions 202a and 202b of the two guide liners can be aligned with the axial cores of the contact chips 16a and 16b. As a result, the two wire rods 11a and 11b delivered from the two guide liners 20a and 20b are not abnormally rubbed at the insertion portions into the two contact chips 16a and 16b, and the generation of chips is remarkably reduced. It is possible to reduce the feeding resistance of the two wires 11a and 11b. Further, the two guide liners 20a and 20b are formed in a bow shape, and an increase in feeding resistance of the two wires 11a and 11b can be suppressed. Accordingly, the two wires 11a and 11b can be stably fed, a uniform film can be formed, and the quality can be remarkably improved. Furthermore, the two guide liners 20a and 20b only need to be cut to a fixed size, and since there is no need for threading or the like, they can be manufactured easily and inexpensively. The merit as a consumable with a high exchange frequency is very large.

[Embodiment 2]
FIG. 2 is a cross-sectional view of an arc spray gun according to Embodiment 2 of the present invention. In the figure, an insertion hole 265a for the first wire 11a is formed in the axial core portion of the first guide liner 26a in the arc spray gun 24. A tapered portion 263a corresponding to the tapered portion 193a of the first liner holding member is formed on the outer surface of the base end portion 261a of the first guide liner, and the first surface of the distal end portion 262a of the first guide liner is A tapered portion 264a corresponding to the tapered portion 214a of the chip body is formed. The function of the second guide liner 26b is the same as the function of the first guide liner 26a, and the description thereof is omitted. Other functions are denoted by the same reference numerals as those in the first embodiment shown in FIG.

  As a result, in addition to the effects exhibited by the arc spray gun 23 of the first embodiment, the shaft cores of the base end portions 261a and 261b of the two guide liners and the shaft cores of the liner holding members 19a and 19b are more accurate. It is possible to match the axis of the tip end portions 262a and 262b of the guide liner with the axis of the contact tips 16a and 16b with higher accuracy. Accordingly, the two wires 11a and 11b can be fed more stably, a uniform film can be formed, and the quality can be remarkably improved.

[Embodiment 3]
FIG. 3 is a cross-sectional view of an arc spray gun according to Embodiment 3 of the present invention. In the figure, as the first guide liner 22a and the second guide liner 22b in the arc spray gun 25, coil liners in which metal wires are spirally wound are used. An insertion hole 225a for the first wire 11a is formed in the shaft core portion of the first guide liner 22a. The base end portion 221a is inserted into the tapered portion 193a of the first liner holding member. Further, the distal end portion 222a is inserted into the tapered portion 214a of the first chip body.

  The first guide liner 22a guides the first wire 11a fed from the first wire feeder 9a and inserted through the first liner holding member 19a to the base end portion 211a of the first chip body. To do. Since the function of the second guide liner 22b is the same as the function of the first guide liner 22a, description thereof is omitted. Other functions are denoted by the same reference numerals as those in the first embodiment shown in FIG.

  When a soft wire made of a material such as aluminum is fed, the material of the two guide liners is preferably a flexible resin that hardly damages the wire. On the other hand, when feeding a wire made of a hard material such as iron, the wire is fed by using a coil liner in which a metal wire shown in FIG. 3 is spirally wound as two guide liners. Sometimes wear and scratches that occur can be reduced.

It is sectional drawing of the arc spray gun of Embodiment 1 of this invention. It is sectional drawing of the arc spray gun of Embodiment 2 of this invention. It is sectional drawing of the arc spray gun of Embodiment 3 of this invention. It is a figure which shows the structure of a general arc spraying apparatus. It is sectional drawing of the arc spray gun of a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Thermal spray power supply device 2 Arc spray gun 3 Compressor 4a 1st push side wire feeder 4b 2nd push side wire feeder 5a 1st wire reel 5b 2nd wire reel 6 Remote control 7 Start switch 8a 1st Push-side guide liner 8b second push-side guide liner 9a first pull-side wire feeder 9b second pull-side wire feeder 10 gun body 11a first wire 11b second wire 12a first Guide liner 121a First guide liner insertion hole 122a First guide liner base end portion 123a First guide liner distal end portion 12b Second guide liner 13 Insulating member 14a First power supply member 141a First power supply Member insertion hole 15a first chip body 151a first chip body insertion hole 152a first chip body liner insertion hole 15b second Tip body 16a First contact tip 161a First contact tip insertion hole 162a First contact tip base end 16b Second contact tip 17 Nozzle 171 Gas ejection hole 18 Compressed gas 19a First liner holding member 191a Insertion hole 192a of first liner holding member Liner insertion hole 193a of first liner holding member Tapered portion 19b of first liner holding member Second liner holding member 20a First guide liner 201a First guide liner 201a Base end portion 202a First guide liner distal end portion 205a First guide liner insertion hole 20b Second guide liner 21a First tip body 211a First tip body base end 212a First tip body Insertion hole 213a First chip body liner insertion hole 214a First chip body tape Pad portion 21b Second tip body 22a First guide liner 221a First guide liner base end 222a First guide liner distal end 225a First guide liner insertion hole 22b Second guide liner 23 Arc Thermal spray gun 24 Arc thermal spray gun 25 Arc thermal spray gun 26a First guide liner 261a First guide liner proximal end 262a First guide liner distal end 263a First guide liner taper 264a First guide liner Taper portion 265a first guide liner insertion hole 26b second guide liner A intersection B central axis

Claims (2)

The gun body,
A first wire feeder that is attached to the gun body and feeds the first wire;
A first guide liner that guides the first wire fed from the first wire feeder to the proximal end of the first electrode;
The first electrode for supplying power to the first wire;
A second wire feeder for feeding a second wire attached to the gun body and insulated from the first wire;
A second guide liner that guides the second wire fed from the second wire feeder to the proximal end of the second electrode;
In the arc spray gun comprising the second electrode for supplying electric power to the second wire,
An insertion hole of the first wire rod is formed in the first wire rod feeding portion of the first wire rod feeder, and the first wire rod feeding portion side of the first wire rod feeder is formed. A first liner holding member having a tapered portion formed on the inner surface on the opposite side,
The proximal end portion of the first guide liner is inserted into the tapered portion of the first liner holding member,
A tapered portion is formed on the inner surface of the base end portion of the first electrode,
A tip portion of the first guide liner is inserted into the tapered portion of the first electrode;
Both ends of the first guide liner are inserted into a bow shape between the tapered portion of the first liner holding member and the tapered portion of the first electrode, respectively, and the repulsive force The both end portions are made of a flexible material that is pressed and supported by the tapered portion of the first liner holding member and the tapered portion of the first electrode, respectively.
An insertion hole for the second wire rod is formed in the second wire rod feeding portion of the second wire rod feeder, and the second wire rod feeding portion side of the second wire rod feeder is formed. A second liner holding member having a tapered portion formed on the inner surface on the opposite side,
A base end portion of the second guide liner is inserted into the tapered portion of the second liner holding member;
A tapered portion is formed on the inner surface of the base end portion of the second electrode,
A tip portion of the second guide liner is inserted into the tapered portion of the second electrode;
Both end portions of the second guide liner are inserted into a bow shape between the tapered portion of the second liner holding member and the tapered portion of the second electrode. An arc spray gun characterized in that both end portions are made of a flexible material that is pressed against and supported by the tapered portion of the second liner holding member and the tapered portion of the second electrode. Tapered portions are formed on the outer surfaces of the both end portions of the first guide liner according to claim 1,
An arc spray gun characterized in that tapered portions are formed on outer surfaces of the both end portions of the second guide liner.

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