JPH08229688A - Torch structure of robot or automatic welding machine - Google Patents

Abstract

PURPOSE: To reproduce the position and the angle of bend to a holding part body of a torch body same as those before the exchange by attachably/ detachably fitting the torch body and a composite cable to the holding part body. CONSTITUTION: A holding part body 1 consists of a holding part 3 and projecting parts 2, 4, a groove 15 is formed in the forward end surface of the forward projecting part, and a through hole 5 for gas, etc., is formed in the body, a contact tube 18 is extended from the rear end part of a torch body 6 where a nozzle 16 is internally fitted to the tip and a bent part 17 is formed in the middle, and a flange 19 is fitted to the torch body. A cylindrical connector 21 is continuously provided on the tip of a contact cable 7, a connection block 22 for jointly tightening is arranged on the outer circumference of a connector, the flange is inserted in the groove 15, the contact tube is tightened and fixed by the holding part body, and the rear projected part of the holding part body is inserted in the cylindrical connector to be jointly tightened by the connection block.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a torch structure in a robot arm or automatic welding machine having a grip portion to be held by a welding arm of a robot arm or automatic welding machine.

[0002]

2. Description of the Related Art In a conventional torch, a torch body is often damaged by interference with a work or deteriorated by welding heat. (See, for example, Japanese Utility Model Laid-Open No. 61-67974).

[0003]

By the way, in the case of a torch for a robot or an automatic welding machine, since the movement locus of the torch is previously taught as the movement locus of the grip portion, the torch body If the torch body is curved in the middle, when the torch body is replaced, if the front and rear position of the toe body and the bending direction are not reproduced exactly the same as before the replacement, the movement trajectory of the torch will be incorrect. However, there is a problem that accurate welding cannot be performed. Further, there is a high possibility that the compo- ble side will be swung around by a robot or the like, and the compo- ble cable is likely to be damaged, so that the compo- cable may need to be replaced.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to provide a toe body and a component cable to a gripping body. They are removably attached and each can be replaced very easily, in which case the front and rear position and bending direction of the torch body relative to the grip body can be reproduced exactly as before, and the welding work The present invention aims to provide a torch structure in a robot or an automatic welding machine which can be accurately manufactured.

[0005]

In order to achieve the above object, the torch structure of the robot or automatic welding machine according to the present invention comprises a grip portion body including a grip portion and projections before and after the grip portion. , A vertical groove is formed on the front end surface of the front protruding portion, and a through hole for gas, wire, etc. is formed in the central portion in the axial direction of the body, and a nozzle is provided at the front end to form a curved portion in the middle. The contact tube is extended from the rear end portion of the torch body formed with the contact tube, and a flange that is inserted through the contact tube and abuts against the rear end portion is attached to the toe body and both sides of the flange are attached. A cut surface is formed by cutting the surface to the width of the groove, a cylindrical connector is continuously provided at the tip of the component cable, and a connection block for joint tightening is arranged on the outer periphery of the cylindrical connector. Hold it on the component cable side, and -The flange attached to the rear end of the gripping part is inserted into the groove of the tip surface of the gripping part body, and the contact tube is communicated with the through hole in the gripping part body. The contact tube was tightened and fixed with the holding body, and the rear projection of the gripping body was inserted into the tubular connector, and was also tightened with the connection block held on the component cable side. It is characterized by that.

[0006]

With the torch structure of the robot or the automatic welding machine configured as described above, when replacing the torch body with respect to the grip portion body, first, the grip portion body and The torch body can be easily pulled out and separated from the grip body by unfastening the contact tube. Next, prepare a new torch body with the same shape, and insert the contact tube of the torch body into the gripping part body while inserting it into the groove at the tip of the gripping part body. By making the side surface of the formed flange abut and making the flange surface abut the tip surface of the grip portion body in the groove, the torch body is determined in the front-back position and the bending direction with respect to the grip portion body. Therefore, in this state, the contact tube is tightened and fixed with the gripping body, and the new toe body is reproduced in the same arrangement as the toe body before replacement.

Further, when replacing the compo-nable with respect to the gripping part body, first, by unfastening the gripping part body and the tubular connector together by the connection block, the compo- ble is gripped. Can be easily pulled out and separated from the holding part body. Next, prepare a new compo cable,
The tubular connector connected to the tip of the component cable is housed in the connection block, and the connection block is tightened while the rear protruding portion of the body of the holding portion is inserted into the tubular connector. Tighten the body and the tubular connector together.

[0008]

1 to 4 relate to an embodiment of the present invention. FIG. 1 is a sectional view of a main part of a torch according to the present invention.
2 is a sectional view taken along the line AA of FIG. 1, FIG. 3 is a sectional view taken along the line BB of FIG. 1, and FIG. 4 is a sectional view taken along the line CC of FIG.

In the figure, reference numeral 1 is a grip portion body, and the grip portion body 1 comprises a large-diameter front projection portion 2, a medium-diameter grip portion 3 and a small-diameter rear projection portion 4. In addition, a through hole 5 for gas, wire, etc. is formed at the center in the axial direction. Then, the front protruding portion 2 and the grip portion 3 are connected to the body.
The rear protrusions 4 are respectively applied to the connection of the component 6 and the connection of the component cable 7. Further, the outer periphery of the grip portion 3 is covered with a cylindrical body 8 made of an elastic material such as rubber, and the grip portion body 1 is welded through the cylindrical body 8 by a robot arm (not shown) or an automatic welding machine. It is held by Het.

In front of the cylindrical body 8, the grip portion body is
A casing 9 for accommodating the front protrusion 2 of 1 is arranged,
The casing 9 is prevented from rotating with respect to the grip portion body 1 by a pin 10. A window 1 into which a tightening screw 11 is inserted is provided on one side of the lower portion of the casing 9.
2 is formed. Further, an insertion hole 13 for a contact tube, which will be described later, is formed in the front protruding portion 2 and a part of the grip portion 3, and an interrupt 14 is made from the hole 13 to the lower end. A vertical groove 15 is formed on the tip surface of the protrusion 2.

A nozzle 16 is provided at the tip of the torch body 6.
And a curved portion 17 is formed in the middle of the toe body 6, and from the rear end of the toe body 6 is an insertion hole 13 formed in the gripping body 1. The contact tube 18 is extended toward. Further, a flange 19 is attached to the toebode 6 so that the contact tube 18 is inserted and brought into contact with the rear end portion of the toebode 6. Further, both side surfaces of the flange 19 are provided with cut surfaces 20, 20 which are cut to have substantially the same width as the vertical groove 15 of the tip end surface of the grip portion body 1. Is fitted in the groove 15 and the flange surface is brought into contact with the bottom surface of the groove 15.

Further, a cylindrical connector 21 into which the rearward projecting portion 4 of the grip portion body 1 is inserted at the time of assembling is connected to the front end portion of the component cable 7, and the cylindrical connector 21 is provided. Are held by the connection block 22 for joint tightening. The connection block 22 has a cover 23 that covers the outer periphery of the component cable 7,
It is held by the bull 7, and a window 25 into which a screw 24 for joint tightening is inserted is formed at one side of the lower portion of the connection block 22. The connection block 22 has a hole 26 for enclosing the tubular connector 21 and the hole 2
An interrupt 27 is made from 6 to the lower end. In addition,
Reference numeral 28 is an insulating plate that forms a side frame of the grip portion 3 of the grip body 1, and 29 is a lid that covers the front surface of the casing 9.

In the torch structure of the robot or the automatic welding machine having the above-described structure, the grip portion 3 of the grip portion body 1 is normally gripped by the robot arm or the welding head of the automatic welding machine. While being held, it moves along a movement path that has been taught in advance, and welding work is performed on the nozzle 16 side. When the torch body 6 needs to be replaced, first, the screw 11 is loosened, and the forward protrusion 2 of the grip body 1 and the contact tube 18 are unfastened. -Chibode-6 can be easily pulled out and separated from the gripping body-1. Next, a new torch body 6 having the same shape is prepared, and the contact tube 18 of the torch body 6 is inserted into the hole 13 in the grip body 1 while the front of the grip body 1 is inserted. By contacting the side surfaces 20 and 20 of the flanges 19 and 19 mounted on the torch body 6 with the groove 15 on the tip surface of the protrusion 2 and the flange surface against the bottom surface of the groove 15, Since the front-back position and bending direction of the grip body 6 with respect to the grip portion body 1 are determined, tighten the screw 11 in this state,
The contact tube 1 with the front protrusion 2 of the grip body 1
By tightening and fixing 8, the new toe body 6 is reproduced in the same layout as the toe body 6 before replacement.

When the component cable 7 needs to be replaced, first, the screw 24 is loosened and the connection block 22 tightens the rearward projecting portion 4 of the grip portion body 1 and the tubular connector 21 together. The component cable 7 can be easily pulled out and separated from the grip portion body 1 by releasing. Next, a new component cable 7 is prepared, the tubular connector 21 connected to the tip of the component cable is housed in the connection block 22, and the rearward protrusion of the grip portion body 1 into the tubular connector 21. With the part 4 inserted, the connection block 22 is tightened with the screw 24, and the grip part body 1 and the tubular connector 21 are tightened together, and the replacement of the component cable 7 is completed.

[0015]

According to the present invention, the torch body is gripped by the side surface of the flange attached to the grip portion body when the grip portion body is gripped by the robot arm or the welding head of the automatic welding machine. Since it is accurately positioned in the groove of the holding part body and tightened to the gripping part body in the same bending direction, there is no change in the arrangement of the toe body before and after replacement of the toe body. To the grip section body
The torch structure in a robot or automatic welding machine that can accurately reproduce the layout of the tibode and enables accurate welding work.

Further, since the compotable can be easily replaced with respect to the body of the gripping portion, the torch structure of the robot or the automatic welding machine can cope with damage and deterioration of the compotable.

In the above replacement, it is only necessary to loosen the screw, attach a new torch body or component cable, and tighten the screw, so that the replacement operation is simple and easy. -It becomes a chi structure.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of a torch according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

3 is a sectional view taken along line BB of FIG.

FIG. 4 is a sectional view taken along line CC of FIG.

[Explanation of symbols]

 1 Grip part body 2 Front protrusion part of the grip part body 3 Grip part body grip part 4 Rear protrusion part of the grip part body 5 Through holes for gas, wire, etc. 6 Torch body 7 Component cable 11 Tightening screw 15 Vertical groove 16 Nozzle 17 Curved part 18 Contact tube 19 Flange 20 Cut surface 21 Cylindrical connector 22 Connection block 24 Co-tightening screw

Claims (1)

[Claims] 1. A torch structure for a robot or an automatic welding machine having a gripping body that is gripped by a robot arm or a welding head of an automatic welding machine, wherein the gripping body is gripped by a gripping portion. And the front and rear projections, and a groove is formed in the vertical direction on the front end surface of the front projection, and a through hole for gas, wire, etc. is formed at the center in the axial direction of the body. A contact tube is extended from the rear end of the torch body with a nozzle inside and a curved portion formed in the middle, and a flange that contacts the rear end is inserted through the contact tube. Mounted on the flange, forming a cut surface on both sides of the flange to the width of the groove, connecting a cylindrical connector to the end of the component cable, and connecting the outer circumference of the cylindrical connector for joint tightening. Arrange blocks and compose the connection block. A flange attached to the rear end portion of the torch body is inserted into the groove of the tip surface of the grip portion body, and the contact tube is held inside the grip portion body. The contact tube is tightened and fixed with the gripping part body in a state of being communicated with the through hole, and the rear projection of the gripping part body is inserted into the tubular connector, and the compo- cable side The joint block is fastened together with the connection block held by the robot or automatic welding machine.
Chi structure.