JPS5973186A - Spatter removing device of welding torch - Google Patents

Abstract

PURPOSE:To provide a titled device which removes the spatter sticking at the top end of a welding torch without damaging the torch by forcing an insertable compression coiled spring into the gap between the nozzle of the torch and a tip and rotating the same. CONSTITUTION:A compression coiled spring 12 is fixed by screwing into the groove 14 in the fixing part 13 of a rotating body 11. The top end of the spring 12 is inserted into the gap G between the nozzle 6 of a torch 1 and the tip 4, and when the body 11 is rotated, the spatter in the gap G is scraped out. Since the spring diameter of the spring 12 changes with a torsional direction, there is a degree of freedom in inserting the same into the gap G and there is no damage on the torch. Since the spring is flexible, it absorbs the bending and offcentering of a revolving shaft which contribute, on the contrary, to the thorough cleaning in the gap G. Wire brushes 15, 16 are attached to the end of the body 11 to clean the end of the torch 1 and the top end of the tip 4.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a welding torch spatter removal device for removing spatter attached to the tip of a welding torch.

Spatter may adhere to the welding torch during welding work,
This spatter has a high probability of adhering to the tip of the welding torch by ≠2. In particular, if this spatter enters the gap between the chip fixed to the torch body and the nozzle fixed to the torch body to accommodate this chip and adheres to this area, various problems may occur. It will happen.

FIG. 1 is a sectional view showing an example of the tip of a welding torch, and d is the torch body. 2 is gas and welding wire 5
It is a conduit that guides the torch, and is fixed inside the torch body 1 with an insulating molding material 3.

Reference numeral 4 denotes a tip attached to the tip of the conduit 2, and the welding wire 5 slides inside the conduit 2 and is sent out from the tip of the tip 4 at a constant speed through an outlet hole provided in the tip 4. Reference numeral 6 denotes a nozzle having one end fixed to the torch body 1 so as to surround the handle 4 and the other end open, and is arranged concentrically with the tip 4 with a gap G in between. Reference numeral 7 denotes an insulating ring made of an insulating material, which electrically insulates the torch main body 1 or nozzle 6 from the conduit 2 or the tip 4, and also attaches to the protrusion of the conduit 2 from the torch main body 1 and this part. The attached tip 4 is supported on the torch body 1 and the nozzle B. 8 is the gas introduced by conduit 2,
This is a gas suction hole provided in the radial direction of the tip of the conduit 2 for blowing out from the tip. 9 is a gas suction port provided with an insulating ring 8Vc, and the gas introduced through the conduit 2 passes through the gas suction port 9 from the gas suction hole 8 and is sucked out into one gap G between the chip 4 and the nozzle 6. It will be done. Then, this gas is sucked out from the opening of the nozzle 6 so as to surround the welding wire 5. Thereby, the weld zone is shielded by this gas during the welding operation.

5a is a spherical portion formed at the tip of the welding wire 5 after the welding operation.

Since the welding torch has a structure that is more than normal, if a large amount of spatter adheres to the inner wall of the tip 4 or the nozzle 6 so that the spatter remains in the gap G between the tip 4 and the protrusion 4, gas flow will be obstructed. As a result, gas cannot be blown out smoothly from the opening of nozzle B. Also, in automatic welding machines, etc., the welding torch should not touch other parts for a short time! Equipped with a collision detection circuit device that detects 1IVc and prevents damage to the welding torch due to collision. this is.

When the torch body 1 or nozzle 6 and other parts come into electrical contact, or when the nozzle 6 and the tip 4 come into contact with nitrogen gas, the circuit is closed, thereby detecting the contact of the welding torch, and The power supply, etc. is stopped based on the detection signal to prevent damage to the welding torch.
;outside chip 4! jL If too much electricity is applied to the inner wall of the nozzle 6, it will cross the gap G and cause an electrical short circuit between the chip 4 and the nozzle 6 due to sputtering. In this case, even though the welding torch does not come into contact with any other member, the collision detection circuit determines that the welding torch has come into contact with another member, and stops power supply, etc., and the welding operation is stopped.

Conventionally, when welding is performed manually, the operator visually determines the degree of adhesion of spatter, and when the degree of adhesion becomes high, the welding torch KJ applies a suitable impact to remove the spatter. However, this method applies an impact to the welding torch, which may cause damage to various parts of the welding torch, and there are doubts about the reliability of spatter removal.

In particular, in the case of automatic welding, the welding etc. must be removed from the arm, which is not practical.

Therefore, in the past, a sputter removal device t as shown in Fig. 2 was used.
I was used. The main part of this is a cylinder, and it is a 1 oil-t cylinder. The inner diameter of this cylinder 10 is somewhat larger than the tip 4, and the outer diameter is somewhat smaller than the inner diameter of the nozzle/v6. The tip is open, and a serrated blade portion 10a is formed at the end. Reference numeral 11 denotes a rotating body connected to a rotary drive device (not shown), and the rear 4 of the cylinder 10 is fixed to the rotating body 11 so as to rotate around its axis.

Thus, in order to remove spatter adhering to the welding torch, the rotary drive device is first driven to rotate the rotating body 11. Then, one cylinder 10 rotates. In this state, the tip 4 of the welding torch is inserted into the inner diameter of the cylinder 10 from its tip. As a result, the spatter that has entered the cylinder i (H; 1 gap G) and adhered thereto is removed.

Furthermore, when the tip 4 is inserted into the cylinder 10, the tip of the cylinder 10 comes into pressure contact with the end of the insulating ring 7, and all the spatter within the gap G is removed, completing the spatter removal process.

The structure configured in this manner is extremely simple and can more reliably remove spatter≠2, so it is used in many welding fields. However, since the main part is composed of a cylinder, during removal work, unless the hand knob 4 is positioned and inserted into the cylinder 10 with considerable precision, each part of the cylinder 1a will touch the circumferential surface of the tip 40 and the nozzle B. This has the disadvantage that it comes into contact with the inner wall, etc., and this can cause scratches or the like on the part, or in the worst case, damage the part. Further, the insertion distance of the tip 40 into the cylinder 10 similarly requires considerable precision, and if this is not met, there is a drawback that the insulating ring 7 may be damaged.

The present invention has been made in view of the above points, and its purpose is to obtain a welding torch spatter removal device that can remove spatter without requiring high precision. .

To achieve the above object, the /l? The feature lies in the use of coil spring means. That is, this coil spring means has an inner diameter through which the four-tube can be inserted, and has a shape that allows it to intervene in the gap formed between the hand tab and the nozzle. The coil spring means is driven to rotate about its axis in the center by the rotational drive means.

In this way, even if the positions of the coil spring means and the welding torch are slightly deviated, by inserting the tip into the inner diameter of the coil spring means, the coil spring means will be elastically deformed along the tip, and the coil spring means will be elastically deformed along the tip. If a large force 2 is applied to the means, this force is absorbed by elastic deformation, so no damage is caused to the tip or nozzle.

In the present invention, the inner diameter of the coil spring means may be such that a tip can be inserted therein when the coil spring stops rotating, or it may be possible to insert the tip therein. That is, the diameter may be smaller than this. The coil spring means depends on the relationship between its winding direction and rotation direction.

Depending on the selection, the inner diameter can be expanded. Therefore, it is sufficient to determine the inner diameter U of the coil spring means in advance by taking this expansion into account. Similarly, the outer diameter of the coil spring may be insertable into the nozzle when the rotation of the coil spring is stopped, but it may be impossible to insert the coil spring into the nozzle. The outer diameter of the means may be larger than ≠2.The coil spring means has its winding direction and rotation direction l
Depending on the relationship, the outer diameter can be reduced depending on the selection. Therefore, the inner diameter of the coil spring means may be determined in advance by considering this reduction, and in short, it is sufficient that the coil spring means can be rotated and inserted into the nozzle when inserting the tip.

Further, as the coil spring means, it is possible to use not only a compression coil spring but also a tension coil spring. That is, from the above, the diameter of the tension coil spring can be reduced by selecting the winding direction and rotation direction of the tension coil spring. This is because the tension coil spring extends in its axial direction, and in this state it has the same effect as a compression coil spring.

Furthermore, the present invention focuses on the fact that the coil spring means expands and contracts depending on the winding direction and one rotation direction, as described above, and even if the rotation drive means is made to be capable of forward and reverse rotation. good. That is, the diameter of the coil spring means is reduced by rotating in one direction so that the inner diameter of the coil spring means slides into contact with the peripheral wall of the chip. Then, the diameter of the coil spring means is enlarged by word of mouth in the direction of the curve, so that the outer diameter of the coil spring means slides into contact with the inner wall of the nozzle. In this way, even more
Spatter can be reliably removed.

An embodiment of the present invention shown in FIG. 3 will be described below. That is, 12 is a coil spring forming the main part, and the case where a compression coil spring is used is shown. The tip 4 can be inserted into the inner diameter of this coil spring 12, and its outer diameter is shaped so that it can be inserted into the inner diameter of the nozzle B. The front end 411'i is open, and the rear end is fixed to the rotating body 11. For this fixing, the coil spring 12 is driven to rotate around its axis;
Reference numeral 13 denotes a fixing portion for fixing the coil spring 12 to the rotating body 11. The rear part of the coil spring 12 is tightly wound, and the fixing part 13 is provided with a groove 14 so that this tightly wound part can be screwed and fixed. As a result, coil spring 1
2 is screwed and fixed to the 1st groove 13. Note that the fixing means is not limited to this. The shape of the tip of the coil spring 12 may be the same as a normal shape, but if the tip is bent as shown in FIG. 4, spatter can be removed more easily.

Accordingly, in order to remove spatter attached to the welding torch, the rotary drive device is first driven.

The rotating body 11 is rotated. Then, the coil spring 12 rotates. In this state, tip 4 of the welding torch
is inserted into the inner diameter portion of the coil spring 12 from its tip. As a result, the coil spring 12 enters the gap G and removes spatter deposited therein. Furthermore, when the tip 4 is inserted into the coil spring 12, the tip of the coil spring 12 comes into contact with the end of the insulating ring 7, all the spatter in the gap G is removed, the spatter removal work is completed, and then the coil spring 12 Remove the welding torch from the

Here, a case will be considered in which the welding torch is pressed against the coil spring 12 more than necessary. That is, this is a case where the tip of the coil spring 12 contacts the end of the insulating ring 13 but is pushed further. In this case, a compressive force will be applied to the coil spring 12. As is well known, when a compressive force value z is applied to a coil spring, the coil spring elastically deforms and absorbs the compressive force. Even if the welding torch is pressed more than necessary due to the value z, the coil spring 12 absorbs this compressive force.

The ends of the insulating ring 7 are even less likely to be damaged.

Next, as shown in Figure 5, the axis C of the coil spring 12,
On the other hand, consider the case where the welding torch is inserted with its axis C3 shifted. In this case, when the tip 4 is inserted into the coil spring 12 from the expanded side, the coil spring 12 elastically deforms so that its axis Cj coincides with the axis C1 of the welding torch, and the coil spring 12 deforms along the handle 4. This will intervene in the gap G.

Even with this deformation, the driving force from the rotating body 11 is effectively transmitted to the tip of the coil spring 12.

With the above arrangement, even if the positions of the coil spring 12 and the welding torch are slightly deviated, the coil spring 12 is elastically deformed along the φ protrusion 4 by inserting the tip 4 into the inner diameter of the coil spring 12. Further, if the welding torch value z is pushed in more than necessary and a large force is applied to the coil spring 12, this value will be absorbed by the elastic deformation of the coil spring 12. Excessive force on hand 4 or nozzle ≠ 2
It is possible to prevent damage, etc., without adding value z.

This means that high precision is not required for positioning the welding torch in the device during spatter removal work. This is extremely desirable not only in manual welding but also in automatic welding and the like.

Furthermore, since the spatter is removed by the coil spring 12, the removed spatter can easily enter the interior through the gap between the coil picks, fall down the inner diameter of the coil spring 12, and be easily discharged to the outside. be able to.

Figure @6 shows another embodiment of the present invention, in particular spatter deposited on the tip of the tip 4, the open end JB of the nozzle 6, and a ball formed on the tip of the welding wire 5. A wire brush is added to the rotating body 11 in order to remove oxides on the surface of the portion 5a. A wire brush 15 is used to remove spatter from the tip of the tube 4 and to remove oxides from the surface of the bulb 5a, and is installed in the center of the coil spring 12. 16 is a wire brush for removing spatter attached to the enlarged opening of the nozzle 6;
It is installed at a position corresponding to the part concerned during spatter removal work.

According to this, the spatter in the gap G can be removed by the coil spring 12, and the spatter attached to the tip of the chip 4 can be removed by the coil spring 12.
: I5- and the oxides on the surface of the ball portion 5a are removed by the wire brush 1.
In step 5, spatter adhering to the opening end of the nozzle 6 can be removed with a wire brush 15.

FIG. 7 shows still another embodiment of the present invention,
Only the main parts are shown. That is, this is a cylindrical piece 17 having a serrated blade part 17a at the tip of the coil spring 12.
The spatter is fixed by welding, a roey screw, or other fixing means, which makes it easier to remove spatter.

As is clear from the above description, the main part of the present invention is a coil spring means. Therefore, when a plain force is applied to the welding torch during spatter removal, the coil spring means 9 absorbs this force by its elastic action. As a result, it is possible to obtain a welding torch spatter removal device capable of removing spatter without requiring high precision in positioning the welding torch.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view showing the main parts of a welding torch, Fig. 2 is a partially sectional perspective view showing a conventional example, Fig. 3 is a cutaway front view showing an embodiment of the present invention, and Fig. 4 is a cross-sectional view showing the main parts of a welding torch. A perspective view of main parts showing another embodiment of the present invention, FIG. 5 is an explanatory diagram for explaining the present invention,
FIG. 6 is a cutaway front view showing another embodiment of the invention, and FIG. 7 is a perspective view of essential parts showing still another embodiment of the invention. DESCRIPTION OF SYMBOLS 1: Melting 1 toe body, 4 2 pieces, 5: R1m wire, 6: Nozzle, O: Gap, 7: Insulating ring, 11: Rotating body of rotational drive means, 12: Coil spring means, 17: Cylindrical piece . Ryo 1 Figure Freeze 2 Figure 3

Claims (1)

[Claims] 1. A coil spring means having an inner diameter through which a hand concentrically housed with a gap can be inserted therethrough, and a coil spring means intervening in the gap; A spatter removal device for a welding torch, which is completely equipped with a transmission drive means that rotates around the center. 2. The spatter removal device for a welding torch according to claim 1, wherein the coil spring means is a compression coil spring. 3. The spatter removal apparatus for welding 1 to 1 according to claim 1 or 2, wherein the coil spring means has a tip end bent and raised. 4. Patent d^ characterized in that the coil spring means is equipped with a cylindrical piece having a serrated blade at its tip.
A sputter removal device for a 7'tl contact torch according to item 1 or 2 of the scope of the present invention. 5. A spatter removal device for a welding torch as set forth in claim 1, wherein the transmission drive means is capable of forward and reverse rotation.