CN202461781U

CN202461781U - Welded contact tip

Info

Publication number: CN202461781U
Application number: CN2012200546125U
Authority: CN
Inventors: 陆志伟; 陈军; 俞晶锦
Original assignee: ZHEJIANG MOTORBACS AUTOPARTS CO Ltd
Current assignee: ZHEJIANG MOTORBACS TECHNOLOGY CO., LTD.
Priority date: 2012-02-20
Filing date: 2012-02-20
Publication date: 2012-10-03
Anticipated expiration: 2022-02-20

Abstract

The utility model provides a welded contact tip which comprises a metal body, wherein the metal body is provided with a welding wire passageway which is penetrated along the axial direction, and the metal body is provided with a welding wire outlet at the front end part of the welding wire passageway. The welded contact tip is characterized in that the front half part of the metal body is divided into a plurality of claw petals of which the cross sections are arc along the peripheral direction, and the peripheral wall of the front half part of the metal body is further provided with a clamping ring which enables the claw petals to be contracted inwards. The welded contact tip is simple in structure, and easy to realize, the front half part of the contact tip has the radial scalability, and after the bore diameter of the welding wire passageway is enlarged due to the long-time sliding friction with the welding wire, under the elastic function of the clamping ring, each claw petal is frapped to the center, so that the reliable contact between the inner wall of the welding wire passageway and the welding wire can be guaranteed again, the service life of the contact tip can be prolonged, and the phenomenon of arc breaking caused by the enlarged bore diameter of the welding wire passageway can be further avoided; and therefore, the welding quality can be guaranteed.

Description

A kind of welding electrode

Technical field

The utility model relates to a kind of welding electrode.

Background technology

Ignition tip is a kind of metallic conduction spare that is used for the delivery welding wire, and majority is installed in welding gun foremost, and each ignition tip all offers a channel of welding wire vertically usually, and this passage is used for the installation guiding of welding wire and contacts energising.

Ignition tip in use on the one hand, is supplied with because welding wire passes through channel of welding wire, and there are sliding friction in welding wire and interchannel, and long-time use causes the channel of welding wire aperture to enlarge easily, thereby causes the voltage and current fluctuation, influences welding quality; On the other hand, always expose at high temperature during the front end of ignition tip uses, also will cause wearing and tearing.The channel of welding wire of wearing and tearing back ignition tip opening portion shape in front will change, and welding wire just becomes unstable to the supply of welding portion, causes welding wire to depart from its correct position, thereby can not carry out good welding.According to practical experience, common copper alloy ignition tip is under continuous duty (general 1-2 hour); The problem of groove or endoporus expansion will appear because of wearing and tearing in ignition tip; Thereby cause the current interruption phenomenon, if use 3-4 hour continuously, ignition tip will lose normal ability to work because of wearing and tearing; The ignition tip that need more renew, the production cost of increase enterprise.

In addition, change ignition tip at every turn after, for the bad generation that prevents that welding equipment from causing because of the replacing of ignition tip, need proofread and correct to welding equipment (like the robot welding gun), this also will expend the part production time, increase machining period, reduce working (machining) efficiency.

The utility model content

The utility model technical problem to be solved is that a kind of welding electrode that can improve service life effectively and improve welding quality is provided to above-mentioned prior art present situation.

The utility model solves the problems of the technologies described above the technical scheme that is adopted: a kind of welding electrode; Include metal body; This metal body offers the channel of welding wire that runs through vertically, and said metal body forms filament mouth at the leading section of said channel of welding wire; It is characterized in that: the first half of said metal body is along circumferentially being divided into the curved pawl lobe in a plurality of cross sections, and this metal body also is provided with the collar that makes that said pawl lobe inwardly draws on the periphery wall of first half.

Consider the difficulty and the reliability of products of processing, as preferably, described pawl lobe is advisable with 2～6, and, a plurality of said pawl lobes circumferentially being uniformly distributed with along said metal bodies.

For the elasticity between the multijaw lobe with draw in after compactness, preferred as further, form between the adjacent pawl lobe and arrange vertically and distance is the gap of 0.5～1mm.The gap is too small then is inconvenient to process, and can't make the channel of welding wire inwall and the welding wire of ignition tip well fit after excesssive gap then draws in, influences welding effect.

In order to guarantee the reliable location of collar on metal body, as preferably, the first half of said metal body offers the draw-in groove along circumferential arrangement, and said collar is embedded in the said draw-in groove.So during installation, collar directly is fastened in the draw-in groove, can prevent the collar slippage, and makes things convenient for the installation of collar.

In order to guarantee that each pawl lobe can draw in better under the effect of collar, preferred as further, the distance between said draw-in groove and the said filament mouth is that 1/4th of said metal body total length along its length is the best.Draw-in groove is apart from the hypertelorism of filament mouth, and after then each pawl lobe drew in, the channel of welding wire inwall possibly can't fit tightly with welding wire, can influence the electric conductivity between welding wire and the ignition tip; Draw-in groove is apart from the filament mouth hypotelorism, the then easy Yin Gaowen contact of collar and be out of shape, damage in the welding process, and then influence welding quality.

Compared with prior art, the advantage of the utility model is: the ignition tip first half that will have fixed structure now is partitioned into the pawl lobe that a plurality of spaces are provided with, and through Spring Clip each pawl lobe is drawn in; Simple in structure; Realize that easily the first half of ignition tip has scalability radially, when channel of welding wire because after the sliding friction between long-time and the welding wire and aperture enlarge; Under the elastic acting force of collar; Each pawl lobe tightens up to the center, make the inwall of channel of welding wire can reassure and welding wire between reliable contact, the service life of not only having improved ignition tip; Also avoid causing the current interruption phenomenon, thereby guaranteed welding quality because of the aperture expansion of channel of welding wire.

Description of drawings

Fig. 1 is the ignition tip structural representation of the utility model embodiment.

Fig. 2 is the vertical view of ignition tip shown in Figure 1.

Fig. 3 is the ignition tip user mode cutaway view of the utility model embodiment.

The specific embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

Like Fig. 1～shown in Figure 3, the welding electrode of present embodiment includes a metal body 1, and this metal body 1 offers the channel of welding wire 11 that runs through vertically, and metal body 1 forms filament mouth 12 at the leading section of channel of welding wire 11.

Wherein, The first half 13 of metal body 1 is divided equally through the line cutting is the curved pawl lobe 131 along a plurality of cross sections of circumferential arrangement; The quantity of pawl lobe 131 is advisable with 2～6; Present embodiment obtains the pawl lobe 131 that four edges circumferentially are uniformly distributed with through the cutting of twice line, form between the adjacent pawl lobe 131 arrange vertically, distance is the gap 132 of 0.5～1mm;

The first half 13 of metal body 1 also offers the draw-in groove 14 along circumferential arrangement; Distance between draw-in groove 14 and the filament mouth 12 is 1/4th of metal body 1 total length along its length, is embedded with the elastic collar 2 that makes that each pawl lobe 131 inwardly draws in the draw-in groove 14.

The pawl lobe 131 of the ignition tip first half 13 of present embodiment is following with the processing method of draw-in groove 14: process a circle draw-in groove 14 at ignition tip apart from 1/4th places of filament mouth 12 earlier, be used to place elastic collar 2; Count the aperture 15 of (2～6) in the centre position of former ignition tip along circumferentially getting out corresponding pawl lobe 131 again; Iron wire with the line cutting passes aperture 15 then, carries out the line cutting along welding wire 3 exits of ignition tip, thereby the first half of ignition tip was cut into 2～6 parts of pawl lobe 131 structures in 13 minutes, and gap 132 distances between adjacent two pawl lobes 131 are controlled at 0.5～1mm.

So; The ignition tip of present embodiment in use along with constantly seeing off of welding wire 3, weares and teares though still exist between welding wire 3 and the channel of welding wire 11; But under the active force of elastic collar 2; A plurality of pawl lobes 131 are inwardly drawn in, thereby the aperture of the channel of welding wire 11 after will wearing and tearing dwindles, thereby the inner surface that guarantees channel of welding wire 11 is still fitted with welding wire 3.

Adopt the ignition tip structure of present embodiment, channel of welding wire 11 can not enlarge because of inner wall abrasion, and welding arc is stable; Wire is even; Not only improved production efficiency, guaranteed welding quality, and improved nearly one times than former ignition tip the service life of ignition tip; Thereby reduced the replacing of ignition tip in the welding process, reduced production cost.

Claims

1. welding electrode; Include metal body; This metal body offers the channel of welding wire that runs through vertically, and said metal body forms filament mouth at the leading section of said channel of welding wire; It is characterized in that: the first half of said metal body is along circumferentially being divided into the curved pawl lobe in a plurality of cross sections, and this metal body also is provided with the collar that makes that said pawl lobe inwardly draws on the periphery wall of first half.

2. welding electrode according to claim 1 is characterized in that: described pawl lobe is 2～6, and, a plurality of said pawl lobes circumferentially being uniformly distributed with along said metal body.

3. welding electrode according to claim 2 is characterized in that: form between the adjacent pawl lobe and arrange vertically and distance is the gap of 0.5～1mm.

4. according to claim 1 or 2 or 3 described welding electrodes, it is characterized in that: the first half of said metal body offers the draw-in groove along circumferential arrangement, and said collar is embedded in the said draw-in groove.

5. welding electrode according to claim 4 is characterized in that: the distance between said draw-in groove and the said filament mouth is 1/4th of a said metal body total length along its length.