JPH05192768A - Cleaning device for consumable electrode welding torch - Google Patents

Abstract

PURPOSE:To surely carry out cleaning regardless of the outside diameter and to prevent the occurrence of uneven wear due to a teaching position error, etc., by uniformly pressing rotational cleaning brushes against the cleaning surface on the welding torch cleaning device in a welding robot, self-traveling type automatic welding equipment, etc., to perform consumable electrode welding. CONSTITUTION:In removing spatters stuck to a power feeding part of the consumable electrode welding torch, at least a pair of rotational cleaning brushes 8a and 8b capable of sandwiching the periphery of the power feeding part are provided and an elastic member 16 which energizes these pairs of rotational cleaning brushes 8a and 8b on the peripheral surface of the power feeding part is interposed between the pair of rotational cleaning brushes 8a and 8b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for cleaning a welding torch in a welding robot for performing consumable electrode type welding, a self-propelled automatic welding apparatus and the like.

[0002]

2. Description of the Related Art Generally, in consumable electrode type welding such as MIG welding, MAG welding and carbon dioxide gas arc welding, for example, as shown in FIG. 6, a wire (consumable electrode) 1, a tip 2, a tip body 3, an orifice 4, a nozzle are attached A welding torch composed of screws 5, insulating material 6 and the like is used, and the welding torch is exposed to a high temperature state during welding at all times and is exposed to molten droplets, which makes it extremely difficult to work in an extremely bad environment. Has been.

The degree of contamination of the welding torch varies depending on the welding conditions such as the amount of buildup and the groove depth of the weld, the current value, the shielding gas, etc., but if the welding operation is continued for some time. , Its tip 2, tip body 3,
Spatter adheres to the outer peripheral portion of the orifice 4 and the like, and the quality of the welded parts thereafter deteriorates depending on the degree of the adherence.

Therefore, before such a problem occurs,
The welding robot is moved to the standby position by interrupting the welding work for a period of time, and the welding torch is conventionally cleaned by a cleaning device as shown in FIG. 7, for example. This cleaning device includes a pair of rotary cleaning brushes 8a and 8b for sandwiching the outer periphery of a power feeding portion 7 (a tip 2, a tip body 3, an orifice 4, etc.) of a welding torch as shown in FIG. It is composed of motors 10a and 10b which are connected to rotating shafts 9a and 9b of 8a and 8b to rotate and drive the brushes 8a and 8b.

The rotary cleaning brushes 8a and 8b are arranged with their brush surfaces facing each other, and the power feeding portion 7 of the welding torch is provided.
7, the power supply unit 7 is moved between the pair of rotary cleaning brushes 8a and 8b as shown in FIG.
After being arranged so as to be orthogonal to a and 9b, the rotary cleaning brushes 8a and 8b are rotationally driven in the directions of arrows A and B by the motors 10a and 10b, respectively, to be attached to the outer peripheral portion of the power feeding portion 7 of the welding torch. Spatter is removed. While the brushes 8a, 8b are rotating, the power feeding portion 7 of the welding torch is moved up and down to remove spatter along the axial direction of the power feeding portion 7.

Conventionally, the rotary cleaning brushes 8a, 8b
The rotary shafts 9a and 9b are pivotally supported at predetermined positions. In the case of the welding robot, the moving operation of the welding torch as described above is taught in advance during the teaching work, and during cleaning, the welding robot automatically performs the reproducing operation according to the teaching data.

[0007]

However, in the conventional cleaning device for the consumable electrode type welding torch, the rotary shafts 9a and 9b of the rotary cleaning brushes 8a and 8b are always fixedly arranged at predetermined positions. As shown in FIG. 6, when cleaning the outer periphery of the tip 2, the tip body 3, the orifice 4, etc., whose outer diameter changes along the axial direction, each brush 8a, 8
The load that b comes into contact with the outer circumference also changes depending on the outer diameter, and cleaning of the small outer diameter portion (near the tip of the tip 2)
(Spatter removal) may not be performed reliably.

Further, at the time of cleaning, it is necessary to teach that the pair of left and right rotary cleaning brushes 8a, 8b are located at positions where the outer peripheral surface of the power feeding portion 7 of the welding torch is evenly contacted from the left and right. Is not possible, and when brush cleaning is performed several tens of times a day with the same teaching data, uneven wear on the outer circumference of the tip 2, tip body 3, orifice 4, etc. due to one side contact of the brushes 8a, 8b in about one month. There were also problems such as

The present invention is intended to solve such a problem, and the rotating cleaning brush is uniformly pressed against the cleaning surface so that the cleaning can be reliably performed regardless of the outer diameter and the teaching position error. An object of the present invention is to provide a cleaning device for a consumable electrode type welding torch in which uneven wear due to the like is prevented.

[0010]

In order to achieve the above object, a cleaning device for a consumable electrode type welding torch according to the present invention is a device for removing spatter adhering to a power supply portion of a consumable electrode type welding torch. It is characterized in that it comprises at least a pair of rotary cleaning brushes capable of holding the outer periphery of the portion, and an elastic member for urging the pair of rotary cleaning brushes to the outer peripheral surface of the power feeding portion. Further, the elastic member may be interposed between the pair of rotary cleaning brushes.

[0011]

In the cleaning device for a consumable electrode type welding torch of the present invention described above, when the power feeding portion is arranged between a pair of rotary cleaning brushes in order to clean the power feeding portion of the welding torch,
Due to the elastic force of the elastic member, each rotary cleaning brush is evenly pressed against the outer peripheral surface of the power feeding portion. By interposing the elastic member between the pair of rotary cleaning brushes, the elastic force can be applied to the pair of rotary cleaning brushes by one elastic member.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A cleaning device for a consumable electrode type welding torch as one embodiment of the present invention will be described below with reference to the drawings.
1 to 3 are a front view, a side view and a plan view, each of which is partially broken.

In this embodiment, as shown in FIGS.
A pair of left and right motor mounting lever members 12a and 12b are provided on the vertical plate 11a of the device mounting base 11 by means of bolts 13a and 13b, nuts 14a and 14b and bushes 15a and 15b, respectively. It is mounted rotatably around the bolts 13a and 13b in a plane parallel to 11a). The lever members 12a and 12b are arranged such that their longitudinal directions substantially coincide with the vertical direction and are substantially parallel to each other with a slight gap.

Each lever member 12 arranged in this way
A pair of left and right motors 10a and 10a are provided on the upper ends of the a and 12b.
b is attached and fixed, and each motor 10a, 10
b is connected to a pair of left and right brass rotary cleaning brushes 8a and 8b through rotary shafts 9a and 9b, respectively,
During cleaning (removal of spatter) of the power supply part 7 (see FIGS. 6 and 7) of the welding torch, these rotary cleaning brushes 8a, 8b are used.
Are rotatably driven by motors 10a and 10b, respectively.

At this time, the rotary cleaning brushes 8a and 8b and the motors 10a and 10b are connected to the lever member 12 respectively.
The rotary cleaning brushes 8a and 8b are arranged so as to sandwich the outer periphery of the power feeding portion 7 of the welding torch from the left and right during cleaning.

In the present embodiment, the tension spring (elastic member) 16 is provided with a pair of left and right levers so as to urge the pair of left and right rotary cleaning brushes 8a, 8b toward the outer peripheral surface of the power feeding portion 7 of the welding torch during cleaning. It is interposed between the members 12a and 12b (that is, between the rotary cleaning brushes 8a and 8b) at a position between the bolts 13a and 13b and the motors 10a and 10b. This tension spring 16 has its both ends at each lever member 12
The spring attachments 17a and 17b projecting from the a and 12b are attached to the spring attachments 17a and 17b.

With this tension spring 16, the lever member 12
1a and 12b are respectively urged in the directions indicated by arrows C and D in FIG. 1, that is, when the power feeding portion 7 of the welding torch is inserted between the rotary cleaning brushes 8a and 8b, the rotary cleaning brushes 8a are rotated. , 8b are urged so as to be pressed against the outer peripheral surface of the power feeding portion 7 from the left and right.

Reference numerals 18a and 18b are position regulating bolts mounted outside the lower end portions of the lever members 12a and 12b, respectively. By adjusting the positions of the bolts 18a and 18b, the bolts 18a and 18b are respectively Left and right side plates 11 that form the device mounting base 11
The lever members 12a and 12b can be restricted from rotating in the directions of arrows C and D by contacting with b and 11b. Accordingly, it is possible to prevent interference between the lever members 12a and 12b and the like on the upper end sides of the lever members 12a and 12b.

Further, 19 is an elevation plate 11a of the base 11.
The dust receiver 19 is provided so as to oppose to the rotary cleaner brushes 8a, 8a.
It is possible to catch the spatter which is removed and drops when cleaned by b.

With the above configuration, the power feeding portion 7 of the welding torch.
When the power feeding portion 7 is arranged between the pair of left and right rotary cleaning brushes 8a and 8b from above in order to perform cleaning, the tension springs interposed between the lever members 12a and 12b (rotary cleaning brushes 8a and 8b). By the elastic force of 16, the rotary cleaning brushes 8a and 8b are evenly pressed from the left and right onto the outer peripheral surface of the power feeding unit 7.

In such a state, the motors 10a, 10b
The rotational cleaning brushes 8a and 8b are driven to rotate in the directions indicated by arrows A and B in FIG.
The spatter adhered to the outer peripheral surface of the is removed.

As described above, according to the cleaning device of the present embodiment, the pair of left and right rotary cleaning brushes 8a and 8b are bolts 13a and 13b via the lever members 12a and 12b, respectively.
The rotary cleaning brushes 8a, 8b are arranged so as to rotate around and allow a slight movement, and are biased by the tension springs 16 in the directions of pressing each other.
Are evenly pressed from the left and right onto the outer peripheral surface (cleaning surface) of the power feeding portion 7 of the welding torch.

Therefore, regardless of the outer diameter of the power feeding portion 7, spatter can be reliably removed by the rotary cleaning brushes 8a and 8b, and even if there is some teaching position error in the insertion position of the power feeding portion 7 of the welding torch. It is possible to prevent uneven wear of the power supply section 7.

In the above embodiment, the case where the two motors 10a and 10b are provided to drive the pair of left and right rotary cleaning brushes 8a and 8b respectively has been described, but FIGS. 4 (a) and 4 (b) are shown. With the configuration as shown in (1), the device of the present invention can be formed while the pair of left and right rotary cleaning brushes 8a and 8b are rotationally driven by the single motor 10.

That is, the lever members 12a and 12b are attached to the base 11
With respect to the rotating shafts 20a and 20b, which are respectively pivotally supported with respect to the pulleys 21a and 21b and the gears 24a and 24b.
And pulleys 22a and 22b are respectively connected to the rotary shafts of the rotary cleaning brushes 8a and 8b, and the belts 2 are respectively connected to the pulleys 21a and 22a; 21b and 22b.
Multiply 3a and 23b. And the gears 24a, 24b
In between, the gear 25 that meshes with the gear 24b and the gear 25
And a gear 26 that meshes with the gear 24a are interposed, and the gear 25 is rotationally driven by the motor 10 in the arrow E direction. Further, similarly to the above-described embodiment, the tension spring 16 is interposed between the lever members 12a and 12b.

With the above configuration, in the apparatus shown in FIGS. 4A and 4B, by rotating one motor 10 in the direction of arrow E, the gears 25, 26, 24a, the pulley 21a, the belt 23a and The rotary cleaning brush 8a is rotationally driven in the direction of arrow A through the pulley 22a, and the gear 2
The rotary cleaning brush 8b is rotationally driven in the direction of the arrow B through 5, 24b, the pulley 21b, the belt 23b and the pulley 22b to clean the power feeding portion 7 of the welding torch,
The same effect as that of the above embodiment can be obtained.

Further, in the above embodiment, the lever member 12
The case where one tension spring 16 is interposed between a and 12b has been described, but as shown in FIG. 5, each lever member 12a, 12b has a tension spring 16a, 16b (or Compression springs 27a, 27b)
May be attached.

That is, the eye plate 28 is provided at the lower end of the lever members 12a and 12b below the bolts 13a and 13b.
a and 28b are respectively provided in a protruding manner, and the left and right side plates 11a and 11b are also provided with eye plates 29a and 2a.
9b are respectively projected, and these eye plates 28
a, 29a; 28b, 29b, tension springs 16a, 16
By locking both ends of b, a pair of left and right tension springs 16a and 16b are attached so as to bias the pair of left and right rotary cleaning brushes 8a and 8b to the outer peripheral surface of the power feeding portion 7 of the welding torch during cleaning. ing.

With such a configuration, each tension spring 16
The lever members 12a and 12b are urged by a and 16b in the directions indicated by arrows C and D, respectively, and the same effect as the above embodiment can be obtained. Instead of the tension springs 16a and 16b, as shown by the chain double-dashed line in FIG.
Each lever member 12 at a position above a and 13b
The compression springs 27a and 27b may be interposed between a and 12b and the left and right side plates 11a and 11b, respectively.

[0030]

As described above in detail, according to the cleaning device for a consumable electrode type welding torch of the present invention, when the power feeding portion of the welding torch is arranged between the pair of rotary cleaning brushes, the elastic force of the elastic member is increased. Thus, since each rotary cleaning brush is configured to be uniformly pressed against the outer peripheral surface of the power feeding portion, spatter can be reliably removed regardless of the outer diameter, and uneven wear due to a teaching position error or the like can be prevented. effective.

Further, by interposing the elastic member between the pair of rotary cleaning brushes, the elastic force can be applied to the pair of rotary cleaning brushes by one elastic member, and the apparatus can be constructed very simply. There is also.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing a cleaning device for a consumable electrode type welding torch according to an embodiment of the present invention.

FIG. 2 is a side view showing a partially broken view of the device of the present embodiment.

FIG. 3 is a plan view showing a partially broken view of the device of the present embodiment.

4A and 4B show modified examples of arrangement of a motor and a tension spring in the apparatus of the present embodiment, FIG. 4A is a schematic front view thereof, and FIG. 4B is a schematic side view thereof.

FIG. 5 is a front view schematically showing a mounting modification of a spring (elastic member) in the device of the present embodiment.

FIG. 6 is a side view showing a power supply portion of a general consumable electrode welding torch with a part thereof cut away.

FIG. 7 is a perspective view schematically showing a conventional cleaning device for a consumable electrode type welding torch.

[Explanation of symbols]

 1 Wire (Consumable Electrode) 2 Tip 3 Tip Body 4 Orifice 7 Welding Torch Power Supply Section 8a, 8b Rotation Cleaning Brush 9a, 9b Rotating Shafts 10, 10a, 10b Motor 11 Device Mounting Base 11a Elevation Plate 11b Side Plate 12a, 12b Motor mounting lever member 13a, 13b Bolt 14a, 14b Nut 15a, 15b Bushing 16, 16a, 16b Tension spring (elastic member) 17a, 17b Spring mounting tool 18a, 18b Position regulating bolt 19 Dust receiver 20a, 20b Rotating shaft 21a, 21b, 22a, 22b Pulleys 23a, 23b Belts 24a, 24b, 25, 26 Gears 27a, 27b Compression springs (elastic members) 28a, 28b, 29a, 29b Eye plates

Claims (2)

[Claims] 1. A cleaning device for removing spatter adhering to a power supply section of a consumable electrode welding torch, comprising at least a pair of rotary cleaning brushes capable of holding the outer periphery of the power supply section, and the pair of rotary cleaning brushes. A cleaning device for a consumable electrode type welding torch, comprising an elastic member for urging the outer peripheral surface of the power feeding portion. 2. The cleaning device for a consumable electrode welding torch according to claim 1, wherein the elastic member is interposed between the pair of rotary cleaning brushes.