JP3162043U - Torch cleaner for arc welding - Google Patents

Abstract

An arc welding torch cleaner that removes spatter adhering to an arc welding torch in order to prevent poor welding. A spatter removing unit 38, which is inserted between a shield nozzle and a contact chip and is rotatably attached, a drive unit 12 which applies a rotational force to the sputter removing unit 38, and a sputter removing unit 38 are accommodated. And a bottomed cylindrical liquid receiving portion 39 for receiving the liquid. As a result, the shield nozzle and the contact chip are rapidly cooled by the liquid received in the liquid receiving portion 39, and the shield nozzle and the contact chip and the sputters attached thereto contract at different contraction rates. For this reason, the spatter is easily peeled off from the shield nozzle and the contact chip, and the sputter removal section 38 can surely remove the spatter. [Selection] Figure 1

Description

  The present invention relates to an arc welding torch cleaner that removes spatter adhered to a gas shielded arc welding torch used in gas shielded arc welding.

Conventionally, gas assembly arc welding such as MAG welding and MIG welding has been used when assembling automobile parts and the like. Patent Document 1 discloses a technique of a gas shielded arc welding method. As shown in FIG. 11, an arc welding torch 80 used for gas shielded arc welding includes a substantially bullet-shaped contact tip 85 through which a solid wire is fed and a cylindrical tip holder that holds the base of the contact tip 85. 81, a cylindrical shield nozzle 82 disposed to enclose the contact tip 85 and the chip holder 81, and a nozzle holder 83 to which the shield nozzle 82 and the chip holder 81 are attached. In gas shielded arc welding, a large current is passed through a solid wire that is continuously fed through a contact tip 85 to generate (discharge) an arc between the solid wire and a member to be welded. In this welding method, the solid wire and the member to be welded are melted by the generated heat to weld the member to be welded. When performing welding, an inert gas such as CO ² or argon is supplied from the gas supply port 81a formed in the chip holder 81 in order to prevent the occurrence of blowholes due to the contact between the welding location and air. And the inert gas is supplied from the tip of the shield nozzle 82 to the welding location to prevent contact between the welding location and air. The shield nozzle 82 prevents inactive gas from diffusing and reliably supplies the inactive gas to the welding location, and is indispensable for gas shielded arc welding.

  During welding, spatter, which is fine particles of molten metal, is generated and scattered from the welding location. As shown in FIG. 11, when spatter 99 accumulates at the tip of the shield nozzle 82 or the tip of the contact chip 85, the flow of the inert gas in the shield nozzle 82 becomes worse. Then, the supply of the inert gas to the welding location becomes insufficient, and blow holes are generated, resulting in poor welding.

JP-A-2004-249323

  The present invention provides an arc welding torch cleaner that removes spatter adhering to the arc welding torch in order to solve the above-described problems and prevent welding failure.

In order to solve the above-mentioned problem, the device according to claim 1,
Arc welding for removing spatter adhering to the tip of the shield nozzle of an arc welding torch having a contact tip to which a solid wire is fed and a shield nozzle arranged to enclose the contact tip and supplied with inert gas For torch cleaner
A sputter removing unit that is inserted between the shield nozzle and the contact tip and is rotatably attached;
A driving unit for applying a rotational force to the spatter removing unit;
It has a bottomed cylindrical liquid receiving portion that houses the sputter removing portion and receives a liquid.

The device according to claim 2 is the device according to claim 1,
The spatter removing unit is attached to the upper end of the connecting shaft to which the rotational force from the driving unit is transmitted,
An insertion hole through which the connecting shaft is inserted is formed at the bottom of the liquid receiving portion,
An annular seal that contacts the outer peripheral surface of the connecting shaft is disposed in the insertion hole.
Thereby, the outflow of the liquid received by the liquid receiving part is prevented. For this reason, the liquid is not lost unnecessarily, and failure of the drive unit due to the outflow of the liquid is prevented.

The device described in claim 3 is the device described in claim 2,
A bearing member that rotatably supports the connecting shaft is disposed at the bottom of the liquid receiving portion.
Thereby, a sputter removal part rotates smoothly. For this reason, the sputter removal unit is reliably inserted between the shield nozzle and the contact chip, and the spatter adhering to the shield nozzle is reliably removed.

The device according to claim 4 is the device according to claim 2 or claim 3,
A frame for attaching the drive unit;
The drive unit has a rotating shaft that rotates,
A connecting member that engages with the lower end of the connecting shaft is attached to the upper end of the rotating shaft,
The frame is provided with a base member that receives the connecting member and engages with a lower portion of the liquid receiving portion,
The liquid receiving portion is detachably attached to the base member.
As a result, even when the liquid received in the liquid receiving portion is contaminated with spatter or foreign matter, only the liquid receiving portion can be removed, so that the liquid replacement operation is facilitated.

The device according to claim 5 is the device according to claim 4,
A cylindrical attachment portion through which the upper portion of the base member is inserted is formed at the lower end of the liquid receiving portion.
As a result, the liquid receiving portion can be removed simply by pulling the liquid receiving portion upward, and the attachment of the liquid receiving portion to the base member is completed simply by inserting the upper portion of the base member into the mounting portion of the liquid receiving portion. In addition, the liquid receiving part can be easily attached and detached.

The device according to claim 6 is the device according to claim 5,
The cross-sectional shape of the upper outer peripheral surface of the base member and the inner peripheral surface of the mounting portion of the liquid receiving portion is circular,
The attachment portion of the liquid receiving portion is formed with an L-shaped attachment cam groove that opens at the lower end of the attachment portion,
A pin that engages with the mounting cam groove protrudes from the upper outer peripheral surface of the base member.
As a result, the liquid receiving portion is securely fixed to the base member by the engagement between the mounting cam groove and the pin, and the liquid receiving portion is prevented from falling off from the base member.
Further, it is possible to release the engagement between the mounting cam and the pin by a simple operation of rotating the liquid receiving portion relative to the base member, and the liquid receiving portion can be easily attached and detached.

The device according to claim 7 is the device according to claims 4 to 6,
A plate-like connecting portion is formed at the lower end of the connecting shaft,
A connecting groove through which the connecting portion is inserted is formed at the upper end of the connecting member.
Accordingly, the connecting shaft can be engaged with the connecting member simply by inserting the connecting portion into the connecting groove, and the liquid receiving portion can be easily attached to the base member.

The device according to claim 8 is the device according to claims 1 to 7,
The side surface of the liquid receiving part is made of a transparent material.
Thereby, it becomes easy to check the degree of contamination of the liquid received by the liquid receiving portion.

The device described in claim 9 is the device described in claims 1 to 8,
It further has an object detection sensor that activates the drive unit when it detects the intrusion of the arc welding torch directly above the spatter removal unit and the intrusion of the arc welding torch directly above the spatter removal unit. And
Thereby, since a drive part operates automatically, it does not take effort. Furthermore, when the intrusion of the arc welding torch directly above the spatter removal unit is not detected, the drive unit stops, so that energy is not wasted.

The device according to claim 10 is the device according to claims 1 to 9,
An opening hole opened from the horizontal direction is formed at a position directly above the sputter removal section, and has a gas ejection member to which compressed air is supplied.
Thereby, since the liquid adhering to a shield nozzle or a contact chip is scraped off by the compressed air which ejects from a gas ejection member, it becomes possible to prevent the welding failure by the dripping to the welding location of the said liquid.

The device according to claim 11 is the device according to claim 10,
When the object detection sensor detects intrusion of the arc welding torch directly above the sputter removal unit, the object detection sensor further includes an electromagnetic valve that opens a flow path through which compressed air is supplied to the gas injection member.
Thereby, since compressed air is automatically supplied to a gas ejection part, it does not take an effort. Furthermore, when the penetration of the arc welding torch directly above the sputter removal unit is not detected, the supply of compressed air to the gas ejection unit is interrupted, so that energy is not wasted.

The device described in claim 12 is the device described in claims 1 to 11,
The spatter removing unit is a coil spring.
As a result, the tip of the rotating coil spring swings in the lateral direction. For this reason, the tip of the coil spring is in uniform contact with the inner surface of the tip of the shield nozzle and the tip of the contact tip, and the spatter adhering to the tip and inner surface of the shield nozzle and the spatter attached to the tip of the contact tip are reliably removed. Is done.

The invention according to claim 13 is the invention according to claims 1 to 11,
The spatter removing unit is a cylinder.
As a result, it is possible to provide a sputter removing unit that can remove spatter attached to the shield nozzle and the contact chip at a low cost with a simple structure.

14. The arc welding torch cleaner according to claim 13, wherein a slit blade is formed on the side surface of the spatter removing portion of the cylinder from the upper end to the middle portion thereof.
Thereby, since the sputter | spatter adhering to a shield nozzle and a contact chip is peeled by the said slit blade, it becomes possible to remove the sputter | spatter adhering to a shield nozzle and a contact chip reliably.

The device according to claim 15 is the device according to claim 14,
A plurality of slit blades are formed at a predetermined angle in the circumferential direction,
A tip in which a plate-like blade is radially arranged from the insertion hole at a predetermined angle in the circumferential direction on a substrate in which an insertion hole having an inner diameter slightly larger than the outer diameter of the blade portion is formed in the center. It further has a deposit removing blade,
With the plate blades engaged with the slit blades and the blade portion inserted through the insertion hole, the tip deposit removing blade is coaxially attached to the middle portion of the cylindrical spatter removal portion. It is characterized by.
As a result, when the arc welding torch is lowered while the tip of the rotating cylindrical spatter removing portion is inserted into the shield nozzle, the spatter adhering to the shield nozzle is removed, and the tip of the shield nozzle is moved to the tip of the shield nozzle. When it is brought into contact with the plate blade, the spatter adhering to the tip of the shield nozzle is removed. For this reason, the flow path of the inert gas supplied in a shield nozzle is ensured, generation | occurrence | production of the blowhole at the time of welding is prevented, and poor welding is prevented.

The device according to claim 16 is the device according to claim 15,
The surface that protrudes above the insertion hole of the plate-like blade is characterized by forming an inclined surface that gradually protrudes from the top to the bottom toward the center of the insertion hole and is curved so as to correspond to the side surface of the tip of the contact tip. To do.
Thus, when the tip side surface of the contact chip is brought into contact with the inclined surface of the plate-like blade, the spatter attached to the tip side surface of the contact chip is removed. For this reason, the flow path of the inert gas supplied in a shield nozzle is ensured reliably, generation | occurrence | production of the blowhole at the time of welding is prevented, and poor welding is prevented.

According to the present invention,
A spatter removing unit that is inserted between the shield nozzle and the contact tip and rotatably mounted;
A driving unit for applying a rotational force to the spatter removing unit;
It has a bottomed cylindrical liquid receiving portion that houses the sputter removing portion and receives a liquid.
As a result, the shield nozzle and the contact tip are rapidly cooled by the liquid received in the liquid receiving portion, and the shield nozzle and the contact tip and the sputters attached thereto shrink at different shrinkage rates. For this reason, the spatter is easily peeled off from the shield nozzle and the contact chip, and it is possible to reliably remove the spatter by the sputter removing unit.
Further, since the contact chip is cooled by the liquid received in the liquid receiving part, softening due to overheating of the contact chip is prevented, and the contact chip has a long life.
When the liquid receiving part receives the spatter adhesion preventing liquid, the spatter adhesion to the shield nozzle and the contact chip is suppressed.

It is a front view of the torch cleaner for arc welding of a 1st embodiment. It is AA sectional drawing of FIG. It is a 3rd view of a connection member. It is a side view of a connecting shaft. It is explanatory drawing which showed the removal state of the spatter adhesion prevention liquid. It is a front view of the torch cleaner for arc welding of a 2nd embodiment. It is detail drawing of a rotary blade member. (Second Embodiment) It is detail drawing of a tip adhering matter removal blade. (Second Embodiment) It is explanatory drawing explaining the effect | action of the device of 2nd Embodiment. It is a sectional side view of the arc welding torch cleaner of another example of the second embodiment. It is explanatory drawing of the conventional gas shield arc welding torch.

(Configuration of Torch Cleaner for Arc Welding of First Embodiment)
A preferred embodiment (first embodiment) of the present invention will be described below with reference to the drawings. As shown in FIG. 1, a welding torch cleaner 30 includes a fixed portion 10 and a fixed portion 10. It is comprised from the attachment / detachment part 30 attached detachably. The fixing unit 10 includes a frame 11, a drive unit 12, a lid member 13, a gas ejection member 14, an object detection sensor 15, a terminal block 16, a solenoid valve 17, a compressed air flow pipe 18, a compressed air supply pipe 19, a base member 21, The connecting member 22 and the pin 23 are included. The attachment / detachment portion 30 includes a bearing attachment member 31, a bearing member 32, a seal attachment member 33, a seal 34, a connecting shaft 36, a spring attachment member 37, a spatter removing coil spring 38, and a liquid receiving cylinder 39.

  The drive unit 12 is attached to the lower surface of the horizontal plate 11 a of the frame 11. The drive unit 12 includes an actuator such as an electric motor and a speed reducer including a plurality of gears that decelerate the rotation of the actuator. A rotating shaft 12a protrudes upward from the upper portion of the drive unit 12. The rotational force of the actuator is applied to the rotary shaft 12a after being decelerated by the speed reducer.

  A base member 21 is attached on the horizontal plate 11a. The base member 21 has a bottomed cylindrical shape. In the present embodiment, the outer shape of the cross section of the base member 21 is circular. An attachment portion 21c having an outer diameter smaller than that of other portions is formed on the upper portion of the base member 21. A pin 23 projects from the attachment portion 21c. As shown in FIG. 2, a shaft hole 21 a is formed in communication with the center of the bottom of the base member 21. The rotation shaft 12a of the drive unit 12 is inserted into the shaft hole 21a, and the rotation shaft 12a enters the base member 21. A drain hole 21 b that communicates with the bottom of the base member 21 is formed on the side surface of the base member 21.

  As shown in FIG. 3, the connecting member 22 has a block shape. 3A is a top view of the connecting member 22, FIG. 3B is a side view as viewed from the arrow B in FIG. 3A, and FIG. In the present embodiment, the connecting member 22 has a cylindrical shape. A rotating shaft insertion hole 22 a is formed on the lower surface of the connecting member 22. A connection groove 22 b is formed on the upper surface of the connection member 22. As shown in FIG. 2, the rotating shaft 12a is inserted into the rotating shaft insertion hole 22a of the connecting member 22, and the connecting member 22 is fixed to the rotating shaft 12a.

  A bearing mounting member 31 is mounted on the base member 21 coaxially with the base member 21. A cylindrical mounting portion 31 a is formed at the lower portion of the bearing mounting member 31. The cross-sectional shape of the inner peripheral surface of the attachment portion 31a is circular. As shown in FIG. 1, an L-shaped mounting cam groove 31b is formed in the mounting portion 31a. The attachment cam groove 31b is open to the lower end of the attachment portion 31a. The attachment portion 21c of the base member 21 is inserted into the attachment portion 31a, the pin 23 is engaged with the attachment cam groove 31b, and the bearing attachment member 31 is attached to the base member 21. When the bearing mounting member 31 is rotated with respect to the base member 21, the engagement between the mounting cam groove 31 b and the pin 23 is released, and when the bearing mounting member 31 is lifted in this state, the bearing mounting member 31 is moved to the base member 21. Removed from. With such a structure, the detachable part 30 is detachable from the fixed part 20. The upper side of the bearing mounting member 31 is a liquid receiving portion mounting portion 31d. In the present embodiment, the cross-sectional shape of the outer peripheral surface of the liquid receiving portion attachment portion 31d is a circular shape.

  As shown in FIG. 2, a bearing mounting hole 31 c is formed at the center of the bearing mounting member 31 so as to communicate vertically. Two bearing members 32 are mounted in the bearing mounting hole 31c. In the present embodiment, the bearing member 32 is a ball bearing. A connecting shaft 36 is pivotally supported on the bearing member 32.

  The structure of the connecting shaft 36 will be described with reference to FIG. In FIG. 4, (A) is a side view, and (B) is a side view as seen from a direction in which (A) is shifted by 90 ° in the circumferential direction. A plate-like connecting portion 36 a is formed at the lower end of the connecting shaft 36. In the center of the connecting shaft 36, a shaft support portion 36b having a larger outer diameter than other portions is formed. A seal surface 36c is provided above the shaft support portion 36b of the connecting shaft. An upper end portion of the connecting shaft 36 is an attachment portion 36d. As shown in FIG. 2, the shaft support 36 b is sandwiched from above and below by the bearing member 32 and is rotatably attached. The connecting portion 36a at the lower end of the connecting shaft 36 is inserted into and engaged with the connecting groove 22b.

  The liquid receiving portion mounting portion 31 d of the bearing mounting member 31 is inserted into the cylindrical liquid receiving tube 39, and the liquid receiving tube 39 is mounted on the bearing mounting member 31. In this state, the liquid receiving cylinder 39 accommodates the sputter removing coil spring 38. In the present embodiment, the liquid receiving cylinder 39 is made of glass or a transparent resin such as acrylic resin or polycarbonate. For this reason, the inside of the liquid receiving cylinder 39 can be visually recognized. As described above, the liquid receiving cylinder 39, the bearing mounting member 31, and the seal mounting member 33 constitute a bottomed cylindrical liquid receiving portion. A spatter adhesion preventing liquid is received in the liquid receiving portion. The spatter adhesion preventing liquid is composed of hydrocarbons, saturated fatty acids, surfactants, and the like.

  A seal attachment member 33 is attached to the upper surface of the shaft attachment member 31. A shaft hole 33 a is formed in communication with the center of the seal mounting member 33. A seal mounting recess 33b is formed on the inner peripheral surface of the shaft hole 33a so as to be recessed over the entire periphery. In the present embodiment, two seal mounting recesses 33b are formed on the inner peripheral surface of the shaft hole 33a. An annular seal 34 is attached to the seal attachment recess 33b. The material of the seal 34 includes nitrile rubber, fluorine rubber, urethane rubber, silicone rubber, and butyl rubber. A connecting shaft 36 is inserted through the shaft hole of the seal mounting member 33. In this state, the seal surface 36 c of the connecting shaft 36 is in contact with the seal 34. For this reason, the spatter adhesion preventing liquid received in the liquid receiving cylinder 39 is prevented from leaking. Even if the sputter adhesion preventing liquid leaks into the base member 21, the spatter adhesion preventing liquid is quickly discharged from the drain hole 21b.

  The lid member 13 covers the upper end of the liquid receiving cylinder 39. An insertion hole 13 a is formed in the center of the lid member 13.

  A spring attachment member 37 is coaxially attached to the attachment portion 36 d of the connecting shaft 36. In the spring mounting member 37, a columnar base portion 37a and a columnar spring mounting portion 37b projecting upward from the upper surface of the base portion 37a are integrally formed. An attachment hole 37d is formed in the center of the lower surface of the base portion 37a. The mounting portion 36d of the connecting shaft 36 is inserted into the mounting hole 37d of the base portion 37a, and the spring mounting member 37 is attached to the mounting portion 36d of the connecting shaft 36.

  A spatter removing coil spring 38 is attached to the spring attaching portion 37b. In the embodiment shown in the figure, the outer diameter of the spring mounting portion 37b is slightly larger than the inner diameter of the spatter removing coil spring 38, and the spring mounting portion 37b is inserted into the spatter removing coil spring 38. Thus, the spatter removing coil spring 38 is attached to the spring attaching portion 37b. The outer diameter of the spatter removing coil spring 38 is smaller than the inner diameter of the shield nozzle 82. Further, the inner diameter of the sputter removing coil spring 38 is larger than the outer diameter of the contact tip 85. For this reason, the spatter removing coil spring 38 can enter between the shield nozzle 82 and the contact tip 85.

  An object detection sensor 15 is attached to the upper end of the bracket 11b that rises upward from the horizontal plate 11a of the frame 11. The object detection sensor 15 faces a position directly above the insertion hole 13a of the lid member 13. The object detection sensor 15 is a sensor that detects the intrusion of the gas shield arc welding torch 50 (shield nozzle 82) into the insertion hole 13a of the lid member 13. In other words, it is a sensor that detects the intrusion of the arc welding torch 80 (shield nozzle 82) directly above the spatter removing coil spring 38. The object detection sensor 15 includes a photoelectric type and ultrasonic type proximity sensor having a light emitting part and a light receiving part, and a mechanical limit switch.

  A terminal block 16 and an electromagnetic valve 17 are attached to the frame 11. The object detection sensor 15 is connected to the terminal block 16. An electromagnetic valve 17 and an actuator of the drive unit 12 are connected to the terminal block 16. In this way, the object detection sensor 15 is electrically connected to the electromagnetic valve 17 and the actuator of the drive unit 12.

  A gas ejection member 14 is attached to the lid member 13. In the gas ejection member 14, an opening hole 14 a that opens from the horizontal direction is formed at a position immediately above the insertion hole 13 a (spatter removal coil spring 38) of the lid member 13. The gas ejection member 14 is connected to the electromagnetic valve 17 by a compressed intake flow pipe 23. A compressed air circulation pipe 19 to which compressed air is supplied is connected to the electromagnetic valve 17. When the electric valve 17 is opened, the compressed air supplied from the compressed air circulation pipe 19 flows through the compressed air circulation pipe 18 and is ejected from the opening hole 14 a of the gas ejection member 14.

(Operation of the device)
Next, the operation of the device of the first embodiment will be described. When the arc welding torch 80 is moved directly above the insertion hole 13a (spatter removal coil spring 38) of the lid member 13, the object detection sensor 15 detects the arc welding torch 80, and the actuator of the drive unit 12 is activated. Then, the spatter removing coil spring 38 rotates. Further, the electromagnetic valve 17 is opened by the detection signal from the object detection sensor 15, the compressed air is supplied to the gas ejection member 14, and the compressed air is ejected from the opening hole 14 a of the gas ejection member 14.

  The arc welding torch 80 is further lowered to allow the spatter removal coil spring 38 to enter the space between the shield nozzle 82 and the contact tip 85. Then, the shield nozzle 82 and the contact chip 85 are cooled by the spatter adhesion preventing liquid. In general, the contact tip 85 is made of a copper alloy such as chrome copper, and the shield nozzle 55 is also made of copper or a copper alloy which is a metal different from the metal to be welded (for example, steel) in order to suppress spatter adhesion. Yes. Since the thermal expansion coefficient of the sputter 99 is different from that of the shield nozzle 82 and the contact chip 85, when the shield nozzle 82, the contact chip 85, and the sputter 99 are cooled, the sputter 99 and the shield nozzle 82 and the contact chip 85 have different shrinkage rates. Shrink. For this reason, the sputter 99 is easily peeled off from the shield nozzle 82 and the contact chip 85.

By the spatter removing coil spring 38 that rotates, the spatter 99a adhering to the tip and inner surface of the shield nozzle 82 and the spatter 99b adhering to the tip of the contact chip 85 are removed. Since the tip of the spatter removing coil spring 38 can be bent in the lateral direction, the tip of the rotating spatter removing coil spring 38 swings in the lateral direction. For this reason, the tip of the spatter removing coil spring 38 uniformly contacts the tip inner surface of the shield nozzle 82 and the tip of the contact tip 85, and the sputter 99 and the contact tip 85 attached to the tip and inner surface of the shield nozzle 82. Spatter 99 adhering to the tip is reliably removed.
In this embodiment, since the lid member 13 is covered on the upper end of the liquid receiving cylinder 39, even if the spatter removing coil spring 38 is rotated, the lid member 13 prevents the spatter adhesion preventing liquid from scattering. Is done.

  Next, when the arc welding torch 80 is moved upward, the excess spatter adhesion preventing liquid adhering to the shield nozzle 82 and the contact tip 85 is scraped off by the compressed air ejected from the opening hole 14a of the gas ejection member 14. . In the present embodiment, the compressed air contacts only one side of the shield nozzle 82 and the contact tip 85. However, as shown in FIG. 5, the compressed air contacting only one side of the shield nozzle 82 or the contact chip 85 circulates along the peripheral surface of the shield nozzle 82 or the contact chip 85, and the shield nozzle 82 or contact The other side of the chip 85 is reached. For this reason, the excess spatter adhesion preventing liquid adhering to the shield nozzle 82 and the contact chip 85 is surely scraped off. In this way, since the excess spatter adhesion preventing liquid adhering to the shield nozzle 82 and the contact tip 85 is scraped off, the occurrence of poor welding due to the spatter adhesion preventing liquid dripping from the arc welding torch 80 is prevented. It becomes possible.

  Further, when the arc welding torch 80 is moved upward and the object detection sensor 15 no longer detects the arc welding torch 80, the actuator of the drive unit 12 stops and the electromagnetic valve 17 is also closed. Since the spatter adhesion preventing liquid adheres to the shield nozzle 82 and the contact chip 85, it is difficult for spatter to adhere to the shield nozzle 82 and the contact chip 85.

  The arc welding torch 80 attached to the robot arm is sputter removed by the arc welding torch cleaner 40 every predetermined number of times (or for a predetermined time), the contact tip 85 is cooled, and the contact tip is removed. If the temperature is maintained at a temperature at which 85 does not soften, the life of the contact chip 85 is about twice that of the case where the contact chip 85 is not cooled.

(Replacement method of spatter adhesion prevention liquid)
Below, the replacement | exchange method of spatter adhesion prevention liquid is demonstrated. As the arc welding torch cleaner 40 is used, the spatter 99 and foreign matter removed from the shield nozzle 82 and the contact tip 85 are deposited in the spatter adhesion preventing liquid, and the spatter adhesion preventing liquid becomes dirty. At this time, it is necessary to replace the spatter adhesion preventing liquid received in the liquid receiving cylinder 39. In order to replace the spatter adhesion preventing liquid, the lid member 13 is detached from the liquid receiving cylinder 39 and the attaching / detaching portion 30 is rotated. Then, the engagement between the mounting cam groove 31b and the pin 23 is released. In this state, when the detachable portion 30 is lifted, the detachable portion 30 is detached from the fixed portion 10. As described above, since the detachable portion 30 can be easily attached to and detached from the fixed portion 10, the replacement of the spatter adhesion preventing liquid is facilitated.

(Second Embodiment)
The second embodiment will be described with respect to differences from the first embodiment with reference to FIGS. 6 to 9. In the second embodiment, as shown in FIG. 6, the rotary blade member 51 is coaxially attached to the attachment portion 36 d of the connecting shaft 36. The rotary blade member 51 will be described in detail with reference to FIG. 7A is a top view of the rotary blade member 51, and FIG. 7B is a side view of the rotary blade member 51. In the rotary blade member 51, a columnar base portion 51a and a cylindrical blade portion 51b protruding upward from the upper surface of the base portion 51a are integrally formed. A mounting hole 51d is formed in the center of the lower surface of the base 51a. The attaching portion 36d of the connecting shaft 36 is inserted into the attaching hole 51d of the base portion 51a, and the rotary blade member 51 is attached to the attaching portion 36d of the connecting shaft 36.
A slit blade 51c is formed on the side surface of the blade portion 51b from the upper end to the middle portion of the blade portion 51b. The slit blade 51c is formed on the side surface of the blade portion 51b at a predetermined angle in the circumferential direction. In the embodiment shown in the figure, four slit blades 51c are formed on the side surface of the blade portion 51b with a circumferential direction of 90 °.
A spatter removal powder discharge port 51f is formed in communication with the lower end of the blade portion 51b.

  As shown in FIG. 6, a tip adhering matter removing blade 52 is attached to the blade portion 51 b in the middle of the blade portion 51 b of the rotary blade member 51. The tip deposit removal blade 52 will be described with reference to FIG. 8A is a top view of the tip deposit removal blade 52, FIG. 8B is a side view of the tip deposit removal blade 52, and FIG. 8C is a perspective view of the tip deposit removal blade 52. is there. The tip adhering matter removing blade 52 has a structure in which a plate-like blade 52b is stuck on a disk-shaped substrate 52a at a predetermined angle in the circumferential direction. A circular insertion hole 52c is formed in the center of the substrate 52a. The inner diameter of the insertion hole 52c is slightly larger than the outer diameter of the blade part 51b. For this reason, the blade portion 51b of the rotary blade member 51 can be inserted into the insertion hole 52c. The plate-like blades 52b are radially attached on the substrate 52a. In other words, the plate-like blade 52b is pasted with its longitudinal direction being the same as the radial direction of the substrate 52a. In the embodiment shown in the figure, four plate-like blades 52b are stuck on the substrate 52a with a circumferential direction of 90 °. As shown in FIG. 8A, the plate-like blade 52b protrudes up to the insertion hole 52c formed in the substrate 52a. An inclined surface 52d is formed on the surface of the plate-like blade 52b protruding above the insertion hole 52c. The inclined surface 52d gradually protrudes from the upper side to the lower side toward the center of the insertion hole 52c. In other words, the inclined surfaces 52d facing each other are widened upward. The inclination angle of the inclined surface 52d is the same as the inclination angle of the side surface of the tip portion of the contact chip 85, and the inclined surfaces 52d facing each other have a curved shape corresponding to the side surface of the tip portion of the contact chip 85. The width dimension of the plate-like blade 52 b is slightly smaller than the width dimension of the slit blade 51 c formed on the blade portion 51 b of the rotary blade member 51. For this reason, the plate blade 52b can enter the slit blade 51c.

  Next, a method for attaching the tip deposit removal blade 52 to the rotary blade member 51 will be described. Each plate-like blade 52b of the tip adhering matter removing blade 52 is aligned with each slit blade 51c, and the upper portion of the blade portion 51b of the rotary blade member 51 is inserted into the insertion hole 52c of the substrate 52a. 52 is dropped from the upper end of the blade part 51 b of the rotary blade member 51. Then, as shown in FIG. 6, the tip attached matter removing blade 52 is coaxially attached to the rotary blade 12 b of the rotary blade member 51 at a position where the plate-like blade 52 b comes into contact with the lower end of the slit blade 51 c. In this state, the plate blades 52b have entered the slit blades 51c and are engaged with each other. Therefore, when the rotary blade member 51 rotates, the tip deposit removal blade 52 also rotates. It has become.

  The tip deposit removal blade 52 can be removed from the rotary blade member 51 simply by pulling the tip deposit removal blade 52 upward, and one of the rotary blade member 51 and the tip deposit removal blade 52 is worn or damaged. In this case, it is easy to replace the rotary blade member 51 and the tip deposit removal blade 52.

(Operation of the device of the second embodiment)
Next, the operation of the device of the second embodiment will be described with reference to FIG. Note that the outer diameter of the blade portion 51 b of the rotary blade member 51 is slightly smaller than the inner diameter of the shield nozzle 82. When the arc welding torch 80 is moved directly above the insertion hole 13a of the lid member 13 (the blade portion 51b of the rotary blade member 51), the object detection sensor 15 detects the arc welding torch 80, and the actuator of the drive unit 12 Is activated, and the rotary blade member 51 and the tip deposit removal blade 52 are rotated. Further, the electromagnetic valve 17 is opened by the detection signal from the object detection sensor 15.

  The arc welding torch 80 is lowered, and the tip of the arc welding torch 80 reaches the vicinity of the tip of the blade portion 51b of the rotary blade member 51 as shown in FIG. , The shield nozzle 82 and the contact tip 85 are cooled by the spatter adhesion preventing liquid. Then, as described in the first embodiment, the sputters 99a and 99b are easily peeled off from the shield nozzle 82 and the contact chip 85.

  Next, the arc welding torch 80 is lowered so that the tip of the blade portion 51 b of the rotary blade member 51 is inserted into the shield nozzle 82. Then, the spatter 99a adhering to the inside of the shield nozzle 82 is removed by the slit blade 51c formed on the blade portion 51b.

Further, when the arc welding torch 80 is lowered and the tip of the contact tip 85 is inserted between the opposing plate-like blades 52b, the inclined surface 52d of the opposing plate-like blade 52b adheres to the tip of the contact tip 85. Sputtered 99b is removed (state shown in FIG. 9C). At this time, the sputter-removed powder is discharged from the sputter-removed powder discharge port 51f formed at the lower end of the blade part 51b and does not accumulate in the blade part 51b.
Further, when the arc welding torch 80 is lowered and the spatter 99a adhering to the tip of the shield nozzle 82 comes into contact with the plate-like blade 52b (state (C) in FIG. 9), the sputter 99a is removed ( FIG. 9 (D) state). As described above, the contact tip 85, the tip of the shield nozzle 82, and the spatters 99a and 99b are cooled, and the spatters 99a and 99b are easily peeled off from the shield nozzle 82 and the contact tip 85. Is reliably removed.
Next, when the arc welding torch 80 is moved upward, as described in the first embodiment, the compressed air ejected from the opening hole 14a of the gas ejection member 14 adheres to the shield nozzle 82 and the contact tip 85. The excess spatter adhesion preventing liquid is scraped off. Further, when the arc welding torch 80 is moved upward, the object detection sensor 15 does not detect the arc welding torch 80 (state (E) of FIG. 9), the actuator of the drive unit 12 is stopped, and the electromagnetic valve 17 is also blocked.
As described above, when the arc welding torch cleaner 60 of the second embodiment is used, the spatter 99a adhering to the tip and the inside of the shield nozzle 82 and the spatter 99b adhering to the tip of the contact tip 85 can be simultaneously removed. .

  As in the first embodiment, the arc welding torch 80 attached to the robot arm is sputter-removed by the arc welding torch cleaner 40 every predetermined number of times (or for a predetermined time), and contact tips If 85 is cooled and kept at a temperature at which the contact chip 85 is not softened, the life of the contact chip 85 is approximately twice that of the case where the contact chip 85 is not cooled.

  The arc welding torch cleaner 60 of the second embodiment described above has the tip deposit removing blade 52, but as shown in FIG. 10, arc welding without the tip deposit removing blade 52 is performed. Needless to say, the technical idea of the present invention can also be applied to the torch cleaner 21.

  In the embodiment described above, the spatter adhesion preventing liquid is received in the liquid receiving cylinder 39, but water may be received instead of the spatter adhesion preventing liquid. Even in this case, when removing the spatter, the spatter 99 adhering to the shield nozzle 82 and the contact tip 85 is rapidly cooled by the water received in the liquid receiving cylinder 39, and the spatter 99 is used as the shield nozzle 82 and the contact tip 85. It will be in the state which is easy to peel from. Further, since the contact chip 85 is cooled with the water, the contact chip 85 is prevented from being softened by overheating, and the contact chip 85 has a long life.

  Although the present invention has been described above in relation to the most practical and preferred embodiments at the present time, the present invention is not limited to the embodiments disclosed herein. However, it can be changed as appropriate within the scope of the claims of the utility model registration and the gist or concept of the invention that can be read from the entire specification, and the electrode for the electric resistance spot welder and the arc welding torch cleaner with such changes are also included. It should also be understood as being included in the technical scope.

DESCRIPTION OF SYMBOLS 10 Fixed part 11 Frame 11a Horizontal plate 11b Bracket 12 Drive part 12a Rotating shaft 13 Lid member 13a Insertion hole 14 Gas ejection member 14a Opening hole 15 Object detection sensor 16 Terminal block 17 Solenoid valve 18 Compressed air distribution pipe 19 Compressed air supply pipe 21 Base member 21a Shaft hole 21b Drain hole 21c Mounting portion 22 Connecting member 22a Rotating shaft insertion hole 22b Connecting groove 23 Pin 30 Detachable portion 31 Bearing mounting member 31a Mounting portion 31b Mounting cam groove 31c Bearing mounting hole 31d Liquid receiving portion mounting portion 32 Bearing Member 33 Seal mounting member 33a Shaft hole 33b Seal mounting recess 34 Seal 36 Connecting shaft 36a Connecting portion 36b Shaft support portion 36c Sealing surface 36d Mounting portion 37 Spring mounting member 37a Base 37b Spring mounting portion 37d Mounting hole 38 Spatter removal coil Ring 39 liquid receiving tube 40 arc welding torch cleaner (first embodiment)
51 Rotary blade member (second embodiment)
51a Base 51b Blade 51c Slit blade 51d Mounting hole 51f Spatter removal powder outlet 52 Tip removal blade (second embodiment)
52a Substrate 52b Plate-like blade 52c Insertion hole 52d Inclined surface 60 Torch cleaner for arc welding (second embodiment)
80 Torch for arc welding 81 Tip holder 81a Gas supply port 82 Shield nozzle 83 Nozzle holder 85 Contact tip 99 Spatter

Claims (16)

Arc welding for removing spatter adhering to the tip of the shield nozzle of an arc welding torch having a contact tip to which a solid wire is fed and a shield nozzle arranged to enclose the contact tip and supplied with inert gas For torch cleaner
A sputter removing unit that is inserted between the shield nozzle and the contact tip and is rotatably attached;
A driving unit for applying a rotational force to the spatter removing unit;
A torch cleaner for arc welding characterized by having a bottomed cylindrical liquid receiving portion that accommodates the spatter removing portion and receives a liquid. The spatter removing unit is attached to the upper end of the connecting shaft to which the rotational force from the driving unit is transmitted,
An insertion hole through which the connecting shaft is inserted is formed at the bottom of the liquid receiving portion,
The arc welding torch cleaner according to claim 1, wherein an annular seal that contacts the outer peripheral surface of the connecting shaft is disposed in the insertion hole.   The arc welding torch cleaner according to claim 2, wherein a bearing member that rotatably supports the connecting shaft is disposed at the bottom of the liquid receiving portion. A frame for attaching the drive unit;
The drive unit has a rotating shaft that rotates,
A connecting member that engages with the lower end of the connecting shaft is attached to the upper end of the rotating shaft,
The frame is provided with a base member that receives the connecting member and engages with a lower portion of the liquid receiving portion,
4. The arc welding torch cleaner according to claim 2, wherein a liquid receiving portion is detachably attached to the base member.   The arc welding torch cleaner according to claim 4, wherein a cylindrical attachment portion into which an upper portion of the base member is inserted is formed at a lower end of the liquid receiving portion. The cross-sectional shape of the upper outer peripheral surface of the base member and the inner peripheral surface of the mounting portion of the liquid receiving portion is circular,
The attachment portion of the liquid receiving portion is formed with an L-shaped attachment cam groove that opens at the lower end of the attachment portion,
6. The arc welding torch cleaner according to claim 5, wherein a pin that engages with the mounting cam groove projects from an upper outer peripheral surface of the base member. A plate-like connecting portion is formed at the lower end of the connecting shaft,
The arc welding torch cleaner according to any one of claims 4 to 6, wherein a connecting groove into which the connecting portion is inserted is formed at an upper end of the connecting member.   The torch cleaner for arc welding according to any one of claims 1 to 7, wherein a side surface of the liquid receiving portion is made of a transparent material.   It further has an object detection sensor that activates the drive unit when it detects the intrusion of the arc welding torch directly above the spatter removal unit and the intrusion of the arc welding torch directly above the spatter removal unit. The torch cleaner for arc welding according to any one of claims 1 to 8.   The arc welding according to any one of claims 1 to 9, further comprising: a gas ejection member that is formed with an opening hole that is opened from a horizontal direction at a position immediately above the sputter removal unit and that is supplied with compressed air. Torch cleaner.   The object detection sensor further includes an electromagnetic valve that opens a flow path through which compressed air is supplied to the gas injection member when the object detection sensor detects intrusion of the arc welding torch directly above the spatter removal unit. Item 11. A torch cleaner for arc welding according to item 10.   The torch cleaner for arc welding according to any one of claims 1 to 11, wherein the spatter removing portion is a coil spring.   The torch cleaner for arc welding according to any one of claims 1 to 11, wherein the spatter removing portion is a cylinder.   14. A torch cleaner for arc welding according to claim 13, wherein a slit blade is formed on the side surface of the spatter removing portion of the cylinder from its upper end to its middle portion. A plurality of slit blades are formed at a predetermined angle in the circumferential direction,
A tip in which a plate-like blade is radially arranged from the insertion hole at a predetermined angle in the circumferential direction on a substrate in which an insertion hole having an inner diameter slightly larger than the outer diameter of the blade portion is formed in the center. It further has a deposit removing blade,
With the plate blades engaged with the slit blades and the blade portion inserted through the insertion hole, the tip deposit removing blade is coaxially attached to the middle portion of the cylindrical spatter removal portion. The arc welding torch cleaner according to claim 14, wherein   The surface that protrudes above the insertion hole of the plate-like blade is characterized by forming an inclined surface that gradually protrudes from the top to the bottom toward the center of the insertion hole and is curved so as to correspond to the side surface of the tip of the contact tip. The torch cleaner for arc welding according to claim 15.

Images