JPH024795Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic welding torch cleaning device.

A general-purpose automatic welding machine (welding robot) using a shielded gas arc welding method such as CO ₂ , MIG or MAG welding is basically capable of continuous welding. By the way, in shield gas arc welding, if spatter is generated from the welding arc and deposits on the chip or the inner surface of the shield gas nozzle, the shield gas nozzle will become clogged and the shield gas cannot be supplied sufficiently. Since the welded part is exposed to air, embrittlement and blowholes of the weld metal due to oxidation and nitridation occur, making it impossible to obtain a sound welding result. Therefore, even in the above-mentioned general-purpose automatic welding robot that is capable of continuous welding, it is necessary to frequently stop the welding machine and clean the welding torch, specifically by poking the spatter adhering to the inner surface of the shield nozzle or the outer surface of the chip with a needle. The nozzle had to be scraped off, the nozzle had to be removed and the outside brushed, or the nozzle or tip had to be replaced with a new one, resulting in an undeniable drop in efficiency. Further, since it is necessary to monitor the amount of spatter attached and to remove spatter, a worker is required at any time.

The object of the present invention is to provide a device that automatically removes spatter adhering to a welding torch, and to enable continuous unmanned operation of automatic welding machines and the like for long periods of time.

The configuration of the present invention to achieve the above object is to support a revolving member consisting of a shaft part and a plate part integrated with one end of the shaft part so as to be rotatable and movable in the axial direction, and A rod is provided concentrically with and protrudes from the surface of the plate part, and the rod is independently movable in the axial direction with respect to the revolving member, and at least one rod is provided along the imaginary extension line of the rotation center of the revolving member. The rear end of the scraping cutter is pivoted on the surface of the plate of the revolving member, and the scraping cutter and the rod are engaged with each other via a long groove and a pin inside these pivot points, and the rod is rotated. While the scraping cutter is caused to sing by moving in the axial direction, at least one support shaft parallel to the rotation center axis of the revolving member is rotatably supported through the plate portion, and the plate of the support shaft is rotatably supported. This automatic welding torch cleaning device includes a hard brush provided at an end on the surface side of the part, a gear attached to the opposite end, and an idle gear meshing with this gear rotatably provided on the shaft of the revolving member.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The automatic welding torch cleaning device according to the present invention will be described in detail below based on embodiments shown in the drawings.

FIG. 1 shows a partial cross-section of one embodiment of the welding torch ready for cleaning.

1 is a torch body of a welding torch of an automatic welding machine (welding robot), and a nozzle 2 is connected to its tip. A chip 3 for supplying power is incorporated in the center of the tip of the nozzle 2.

The cleaning device 4 is installed within the working range of the automatic welding machine. An air cylinder 6 is installed vertically upward on a floor surface 5, which is an installation surface, and a main body base 8 of the cleaning device 4 is attached to the tip of a piston rod 7 of the air cylinder 6.
The main body base 8 is designed to move up and down as the piston rod 7 moves up and down. At one end of the main body base 8, a revolution member 9 consisting of a shaft part 9b and a disk-shaped plate part 9a is supported via a bearing 10 by the shaft part 9b with the plate part 9a facing upward. The member 9 is rotatable relative to the main body base 8. A through hole is provided concentrically with the rotation center of the revolving member 9, and a rod 11, which is longer than the axial length of the revolving member 9, is attached by penetrating through the revolving member 9 so as to be vertically movable via bearings 12, 12'. There is. The lower end of the rod 11 is attached via a joint 13 to the top of a piston rod 15 of an air cylinder 14 which is held vertically upward on the main body base 8, and when the piston rod 15 moves up and down, the rod 1
1 can independently move up and down relative to the revolving member 9. On the surface of the plate portion 9a of the revolving member 9,
Bearings 16 are fixed at three locations on the circumference with the center of rotation at 120° pitch outside the center of rotation in the radial direction. The rear ends of the scraping cutters 17 are each pivotally supported via a pin 18 so as to be tiltable about the pin 18 as a fulcrum. The three scraping cutters 17 extend in a direction along the imaginary extension line of the rotation center of the revolving member 9, and the outer upper part of the three scraping cutters 17 is made of carbide with a phase shift in a spiral manner. The blades are installed in several stages in a saw-like shape. A long groove 19a is machined in a portion of the rear end of the scraping cutter 17 inside the point where it is pivoted by the pin 18, and a movable pin 19 attached to the top of the rod 11 is inserted therein. engaged. Therefore, each cutter 17 swings about the pin 18 as the rod 11 moves up and down due to the drive of the air cylinder 14. three cutlets 17
Viewed as a whole, it opens and closes, that is, expands and narrows with respect to the virtual extension line. Three bearings 16 attached to the plate portion 9a of the revolving member 9
A support shaft 20 parallel to the rotation center axis is rotatably supported on the revolving member 9 via a bearing 21 through the plate part a, and the surface of the plate part 9a of the support shaft 20 is A disk-shaped wire brush 22 as a hard brush is attached to the side end (upper end), and a gear 23 is attached to the opposite end (lower end) across the plate portion 9a. The gear 23 meshes with an idler gear 25 rotatably attached to the shaft portion 9b of the revolving member 9 via a bearing 24, allowing the support shaft 20 with the wire brush 22 to rotate. A revolving member driving gear 26 is attached to the shaft portion 9b of the revolving member 9,
It meshes with a drive gear 28 of an air motor 27 held on the main body base 8.

As mentioned above, the revolving member 9 moves up and down via the main body base 8 due to the vertical movement of the piston rod 7 of the air cylinder 6, and the revolving member 9 rotates via the gear 26 due to the drive of the air motor 27. A scraping cutter 17 and a support shaft 20 with a wire brush 22 attached to the shaft 9 rotate while moving up and down. Further, the scraping cutter 17 is opened and closed via the rod 11 by the vertical movement of the piston rod 15 of the air cylinder 14.

Next, the cleaning action of the welding torch by the cleaning device having the above configuration will be explained.

During operation of the automatic welding machine during CO ₂ welding, the welding torch 1 is guided and positioned above the cleaning device 4 at a pre-programmed time or at a work break such as workpiece replacement.

When the positioning of the torch 1 is completed, it is detected and the air cylinder 6 and the air motor 27 start driving. The cleaning device 4 starts to rise as the piston rod 7 rises due to the drive of the air cylinder 6, and the drive gear 28,
Scraping cutter 1 via gear 26 and revolving member 9
7 rotates around the outer periphery of the tip 3, and at the same time, the wire brush 22 is rotated by the revolution of its support shaft 20 and the friction between the wire brush 22 and the outer peripheral surface of the nozzle, and the gear 23 and the idle gear 25 mesh with each other. Rotate while doing so. In other words, three scraping cutters 17
is inserted into the nozzle 2 while rotating along the tip 3 so as to wrap around the tip 3, and at the same time, the support shaft 20 with three wire brushes 22 rotates and revolves along the outer surface of the nozzle 2 to cover the outer circumferential surface of the nozzle 2. It rises while brushing.

When the cleaning device 4 reaches the set rising point, the piston rod 15 of the air cylinder 14 receives a signal attached to the air cylinder 6.
is raised, and the rod 11 is raised via the joint 13. As the rod 11 rises, the movable pin 19 on the upper part of the rod 11 and the long groove 19 of the scraping cutter 17
The scraping cutter 17 is engaged with the pin 18 by engagement with a.
It is opened using the fulcrum as a fulcrum and comes into contact with the inner surface of the nozzle 2. If the piston rod 7 of the air cylinder 6 is lowered in this state, the scraping cutter 17 will rotate while catching the inner surface of the nozzle 2, and further,
The mechanism causes the support shaft 20 with the wire brush 22 to rotate around the outer periphery of the nozzle 2, and the wire brush 22
The attached support shaft 20 rotates and descends while brushing the outer peripheral surface of the nozzle 2.

When the piston rod 7 of the air cylinder 6 reaches the lowering point, one cycle is completed, and the above operation is repeated for several cycles as necessary depending on the degree of adhesion of spatter, etc. When the piston rod 7 of the air cylinder 6 reaches the lowering point in the final cycle, the air motor 27
Cleaning is completed with the air cylinder 14 stopped and the piston rod 15 of the air cylinder 14 also lowered. After receiving a signal indicating the end of cleaning, the welding torch is directed to the next automatic welding process.

In the above embodiment, there were three scraping cutters and three wire brushes, but of course the number is not limited to three depending on the size of the torch body, welding conditions, etc., and the material is not carbide or wire, but the nozzle. The material is not limited to carbide or wire as long as it can completely remove spatter adhering to the inside and outside.

As described above in detail based on one embodiment, according to the automatic welding torch cleaning device according to the present invention, cleaning of the inner and outer surfaces of the shield gas nozzle and the welding tip of the welding torch can be performed automatically and with the nozzle and tip attached. Since it can be done quickly and simultaneously, it is possible to reduce the loss time associated with torch cleaning work and improve work efficiency. Further, there is no need for personnel to clean the welding torch, and the automatic welding machine can be operated unmanned for a long time.

[Brief explanation of the drawing]

FIG. 1 shows a partial cross-sectional view of one embodiment of the welding torch ready for cleaning operations.
In the drawing, 1 is the torch body, 2 is the shield gas nozzle, 3
is a chip, 4 is a cleaning device, 6 and 14 are air cylinders, 8 is a main body base, 9 is a revolving member, 1
1 is a rod, 17 is a scraping cutter, 19 is a movable pin, 22 is a wire brush, and 27 is an air motor.

Claims (1)

[Scope of utility model registration request] A revolving member consisting of a shaft portion and a plate integrally formed at one end thereof is rotatably and movably supported in the axial direction, and is concentric with the rotation center of the revolving member and protrudes from the surface of the plate portion. A rod is provided, and the rod is independently movable in the axial direction with respect to the revolving member, and the rear end of at least one scraping cutter along the imaginary extension line of the rotation center of the revolving member is attached to the plate of the revolving member. The scraping cutter and the rod are engaged with each other via a long groove and a pin inside these pivot points so that the scraping cutter swings as the rod moves in the axial direction. At least one support shaft parallel to the rotation center axis of the revolving member is rotatably supported through the plate part, and a hard brush is provided at the end of the support shaft on the surface side of the plate part, and the opposite An automatic welding torch cleaning device characterized in that a gear is attached to the side end, and an idle gear that meshes with the gear is rotatably provided on the shaft of the revolving member.