CN85100694B - Flexible welding gun for congumable electrode - Google Patents

Abstract

The present invention relates to a flexible consumable electrode welding gun for electric arc welding, particularly to a welding gun for the semiautomatic welding of a consumable electrode. In the welding gun, a connection tube part connecting a nozzle and a grip is composed of a plurality of small segments of casing tubes (1). The left side and the right side at the tail end of every casing tube are circular arcs, the edge of every circular arc is provided with a small step, and the upper side and the lower side of the tail end of every casing tube are in a sliding inlay shape. A thin wire rope penetrates through a hole of a plug pin (6) in the circular arc center at the inner sides of the casing tubes to make the casing tubes connected together so as to fix the shape of the connection tube and ensure favorable contact conduction. A casing tube roller (2) is arranged in the casing tubes to guide welding wires to move forwards. A hose of the present invention has the characteristics of changeable working angle, little wire feeding resistance and stable process.

Description

Flexible welding gun for congumable electrode

The melting pole gun that has flexible adapter is used for CO ₂Gas shielded arc welding connects.

Welding gun is a vitals in the melting pole semi-automatic welding.It determines on the one hand to a great extent whether the semiautomatic welding operation is flexible, even can not use at all, also affects the stability of wire feed process on the other hand, affects welding quality.

For the multi-form joint of different spatial, wish that all electrode keeps the relative angle of some the bests in welding process.In the coated electrode manual electric arc welding, accomplish what difficulty this point does not have, the clamping angle of welding rod in electrode holder is just passable as long as change.And in the melting pole semi-automatic welding of continuous wire feed, welding gun generally is unyielding, this hand that just have to require the welder to hold welding gun is deacclimatized this requirement, in welding process, remain a certain relative posture, and this posture often is not that nature is comfortable, time is a length slightly, and it is tired that the workman will feel.Fail to promote more widely so this also is a semiautomatic welding, replace one of reason of manual electric arc welding.

Flexible argon tungsten-arc welding welding gun is promoted in external at present existing advertisement, but to consumable electrode, does not also have similar report.

Melting pole gun all is made up of three parts basically: handle, nozzle and the adapter that this two part is linked up.The shape of taking over can be divided into straight (pistol type), curved (gooseneck type) two kinds.Gooseneck type is because easy to operate comfortable, and using far beyond pistol type is extensively, but welding wire can be subjected to certain resistance by the gooseneck corner.It is provable that welding wire is carried out theory analysis by the suffered resistance of bend pipe: when bend pipe one end has resistance F ₀The time, must apply directed force F at the other end, and F=F ₀e ^Ueμ is the coefficient of friction of bend pipe herein, and Q is an angle of bend.Because Q is forever greater than zero, F is inevitable greater than F ₀That is to say that must apply bigger active force at bend pipe one end just can overcome a certain resistance of the other end.Far away more from wire-feed motor, F is big more, and is also just big more for overcoming the required power that applies of certain resistance, also just big more to the influence of wire feed and arc burning stability.The gooseneck corner of welding gun just in time is place so in the semiautomatic welding system.This point is particularly evident when using thicker welding wire.Russian Patent 610629 has proposed a kind of wire convey soft pipe that roller is housed.Be rolling friction owing to become sliding friction, wire-feeder resistance significantly reduces.But on melting pole gun, all adopt the helix tube of spring steel wire coiled to guide welding wire, also do not see and be the trial that replaces sliding friction with rolling friction.

Purpose of the present invention is little for a kind of wire-feeder resistance of development, variable-angle, the melting pole semi-automatic welding welding gun of reliable operation.The essence of this welding gun is the wire convey soft pipe that has roller to be extended in the welding gun go.

Fig. 1 is each part of this welding gun.(1 ') is nozzle, and welding wire (2 ') stretches out from nozzle, and (3 ') are handle, (4 ') for connecting the adapter of handle and nozzle, (5 ') are the wire convey soft pipe that drags behind the welding gun.The above-mentioned composition of this welding gun is identical with general gooseneck type welding gun commonly used.Different is that adapter (4 ') part is flexible, and eccentric wheel (6 ') is used for taking out the seizing wire that is right after in the pipe.

Flexible adapter is to be connect by many identical segment sleeve pipes to form.

One section adapter that Fig. 2 is made up of three joint sleeve pipes.Fig. 3 is the vertical view of Fig. 2.Take over inside for seeing clearly, be part among two figure and analyse and observe.(1) is sleeve pipe among the figure, and (2) are rollers, two pair rollers is arranged in every joint sleeve pipe shown on the figure, and the roller periphery is fluted, and welding wire (3) promptly advances along this groove.The axle of all rollers (4) all is parallel to each other.The roller shaft two ends also are with spile (5).The length of spile is slightly larger than casing wall thickness, therefore can directly not wear and tear with casing wall with the roller both sides of tapering, only contacts with spile near axis, does like this and can reduce the suffered moment of friction of roller, and avoid the friction of casing wall.Spile and axle are all lived with the casing wall weldering, to play the bracing reinforcement effect.In the hole, center of arc place of sleeve pipe one end projection short latch (6) is arranged, latch and tube wall weldering are lived.Latch is porose, and seizing wire (7) passes pin hole along sleeve pipe both sides inwall sleeve pipe is bound up.Because adjacent two sleeve pipe circular arcs one protruding are recessed, can relatively rotate, and keep well contacting, sleeve pipe both sides up and down has slidably iron chains embedding relation, sleeve pipe can relatively rotate in certain limit like this, but after reaching this limit, owing to be subjected to the restriction of circular arc step small in ends, can not be further crooked, in order to avoid form local dead folding.Because step one end has groove, an end projection becomes iron chains embedding relation, thus sleeve pipe can not relatively move perpendicular to flexible in-plane, to guarantee the stability of the formed welding gun integral body of sleeve pipe.

Pass seizing wire (7) one ends of sleeve pipe pin hole and fix, the other end is taken out steel wire tightly by the eccentric wheel among Fig. 1 (6), produces tension force.This power forces together sleeve pipe tightly.Because latch is in center of arc, therefore when sleeve pipe relatively rotates, the latch invariant positionization, steel wire rope all the time with the sleeve pipe central lines.Distance is constant between latch, and rope capacity is constant, and wherein tension force is also constant.After steel wire rope is taken out tightly slightly, can regulate and take over needed shape.Further take out tight steel wire rope this shape is fixed securely, in whole welding process, remain unchanged, and keep well contact between sleeve pipe, guarantee passing through of welding current.

Whole adapter overcoat sebific duct (not expression on the figure) is to guarantee air guide and electric insulation.Nearer because of distance electric arc, sebific duct should be able to be heat-resisting.

This welding gun characteristics are that operating angle is variable, and wire-feeder resistance is little, process stabilization.

Weld the joint of various diverse location different types with automatic weldering, be difficult to the place, in-position at some especially, also can utilize the extension of the present invention, make the wire feed conduction of consumable electrode or the usefulness that fills silk, handpiece structure is simplified as head.

Claims (5)

1, a kind of CO that is used for ₂The flexible adapter of the melting pole gun of gas shield semiautomatic welding, flexible pipe is formed by many small casings connections, and adjacent bushings can relatively rotate, and in each joint sleeve pipe the roller that can transmit welding wire is housed all, it is characterized in that:

A, the tube ends left and right sides are the circular arc of marginal belt small stair (9).Adjacent casing circular arc one protruding one is recessed, can relatively rotate, and keep good contact.Tube ends up and down both sides is iron chains embedding shape slidably.

B, latch (6) with holes are in the center of cannula tip circular arc, and seizing wire (7) passes pin hole, and an end is fixed, and the other end is regulated by eccentric wheel.

2, adapter according to claim 1 is characterized in that paired roller is all arranged in each small casing, and the outward flange of roller has the groove of guiding welding wire.

3, adapter according to claim 1 is characterized in that Roller Shaft contacts with spile, and spile and Roller Shaft all are welded on the sleeve pipe, and the length of spile is slightly larger than the wall thickness of sleeve pipe, thus make roller can not with the casing wall direct friction.

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