CN220612603U - Integrated gas shielded welding contact nozzle - Google Patents

Abstract

The utility model provides an integral type gas shielded welding contact tip, contact tip body that has is even as an organic whole by contact tip anterior segment, contact tip middle section and contact tip rear segment and constitutes, contact tip rear segment has the external screw thread, contact tip is internal to have the welding wire passageway, the welding wire passageway is by sending a passageway, transition passageway, draw forth the passageway and connect gradually to constitute, send a passageway to be located contact tip rear segment and contact tip middle section, transition passageway and draw forth the passageway and be located contact tip anterior segment, transition passageway is the arc along the bending of contact tip body's axis direction, send a passageway, draw forth the passageway and be the linear type. Because the transition channel is arc, the axis of transition channel and send a passageway and draw forth the passageway is not in a straight line, utilizes the welding wire to pass through the contact pressure that the transition channel produced because of crooked, ensures that the welding wire and the contact tip reliably to guaranteed that the welding wire has a reliable contact point in the front end that is close to the contact tip, avoided welding wire and welding wire passageway inner wall to produce the electric spark promptly, avoided the too big problem of welding wire dry extension again.

Description

Integrated gas shielded welding contact nozzle

Technical Field

The utility model relates to a welding tool, in particular to an integrated gas shielded welding contact tip.

Background

In gas shielded welding using a contact tip, reliable contact between the contact tip and the wire is required, while proper dry elongation (distance from the wire tip to the contact tip) of the wire is required. The basic structure of the existing gas shielded welding contact tip in the market is that a welding wire passing through a welding wire passage is formed in the center of a contact tip body and extends along the axial direction of the contact tip body, and the welding wire passage is a cylindrical straight hole. The disadvantages of this contact tip are: when the welding wire passes through the welding wire channel, the phenomenon of poor contact exists between the welding wire and the inner wall of the welding wire channel, and in the welding process, electric spark is easily generated between the welding wire and the inner wall of the welding wire channel, so that the damage of the contact tip is increased, and the service life of the contact tip is influenced; if the contact position between the welding wire and the contact tip is not determined, the dry extension of the welding wire is increased when the contact position is positioned at the middle and rear part of the contact tip, and the welding quality is further affected. The utility model of China (publication No. CN 205967766U) discloses a carbon dioxide gas shielded welding conductive nozzle, which has the basic structure that the carbon dioxide gas shielded welding conductive nozzle comprises a conductive nozzle body, wherein the conductive nozzle body consists of a conductive nozzle front end, a conductive nozzle middle part and a conductive nozzle rear end, an external thread is arranged on the outer side surface of the conductive nozzle rear end, a wire guide hole through which a welding wire can pass is axially formed in the conductive nozzle body, a counter bore is formed in the front end of the conductive nozzle, a wear-resistant part matched with the counter bore is inlaid in the counter bore, the wear-resistant part is made of a wear-resistant and high-temperature-resistant copper alloy material, and the wear-resistant part is provided with a central hole which is communicated with the wire guide hole and can be penetrated by the welding wire. The contact tip has improved wear resistance at its front end, thereby improving its service life in terms of wear resistance, but still does not solve the problem of reliable contact between the welding wire and the wire passage.

Disclosure of Invention

The utility model aims to provide an integrated gas shielded welding contact tip which can ensure that a welding wire is well contacted with a welding wire channel in the contact tip and the contact position is reasonable.

In order to achieve the above purpose, the present utility model adopts the following scheme: the utility model provides an integral type gas shielded arc welding contact tip, has the contact tip body, the contact tip body is even as an organic whole by contact tip anterior segment, contact tip middle section and contact tip rear segment and constitutes, the surface of contact tip rear segment has the external screw thread, the welding wire passageway that supplies the welding wire to pass that this internal having of contact tip was followed its axial extension, the welding wire passageway is by sending a passageway, transition passageway, draw forth the passageway and connect gradually and constitute, send a passageway to be located contact tip rear segment and contact tip middle section, transition passageway and draw forth the passageway and be located contact tip anterior segment, transition passageway is the arc along the bending of the axis direction of contact tip body, send a passageway, draw forth the passageway and be the linear type.

According to the scheme, as the transition channel is curved to be arc-shaped, the axes of the transition channel, the wire feeding channel and the lead-out channel are not in the same straight line, the welding wire is ensured to be in reliable conductive contact with the conductive nozzle by utilizing the contact pressure generated by the welding wire passing through the transition channel due to the bending, and the welding wire is ensured to have a reliable contact point at the front end close to the conductive nozzle, so that the electric spark generated between the welding wire and the inner wall of the welding wire channel is avoided, and the problem of overlarge dry extension of the welding wire is also avoided.

The utility model has reasonable and reliable structure, long service life, good welding effect and small splashing when in welding use.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present utility model.

Detailed Description

The utility model is further described below with reference to examples and figures.

See FIG. 1

The utility model provides an integrated gas shielded welding conductive nozzle which is provided with a conductive nozzle body 1, wherein the conductive nozzle body 1 is formed by connecting a conductive nozzle front section 13, a conductive nozzle middle section 12 and a conductive nozzle rear section 11 into a whole, the surface of the conductive nozzle rear section 11 is provided with external threads, and a welding wire channel which extends along the axial direction of the conductive nozzle body 1 and is used for a welding wire to pass through is arranged in the conductive nozzle body. The welding wire channel is formed by sequentially connecting a wire feeding channel 14, a transition channel 15 and an outgoing channel 16, wherein the transition channel 15 is positioned between the wire feeding channel 14 and the outgoing channel 16, the wire feeding channel 14 is positioned in the rear section 11 and the middle section 12 of the contact tip, the transition channel 15 and the outgoing channel 16 are positioned in the front section 13 of the contact tip, the transition channel 15 is bent to be arc along the axial direction of the contact tip body 1, and the wire feeding channel 14 and the outgoing channel 16 are linear. In addition, both ends of the transition channel 15 are smoothly connected with the wire feeding channel 14 and the extraction channel 16.

In this embodiment, the length of the extraction channel 16 is 1-3 times its aperture. The axial length of the leading-out channel adopts the above numerical value, and the following effects can be achieved: in general, it is preferable that the dry extension of the welding wire is 10 to 12 times the diameter of the welding wire (or the diameter of the lead-out passage), and since the junction of the transition passage 15 and the lead-out passage 16 is a reliable contact point between the welding wire and the contact point, the distance between the contact point and the front end of the contact point is 1 to 3 times the diameter of the welding wire, the actual length of the dry extension of the welding wire is not excessively long, and the welding effect is ensured.

Claims (2)

1. The utility model provides an integral type gas shielded arc welding contact tip has the contact tip body, the contact tip body is even as an organic whole by contact tip anterior segment, contact tip middle section and contact tip rear segment and constitutes, and the surface of contact tip rear segment has the external screw thread, has in the contact tip body along its axially extending's welding wire passageway that supplies the welding wire to pass, its characterized in that: the welding wire channel is formed by sequentially connecting a wire feeding channel, a transition channel and an extraction channel, wherein the wire feeding channel is positioned in the rear section of the conductive nozzle and the middle section of the conductive nozzle, the transition channel and the extraction channel are positioned in the front section of the conductive nozzle, the transition channel is bent to be arc-shaped along the axial direction of the conductive nozzle body, and the wire feeding channel and the extraction channel are linear.

2. The integrated gas metal arc welding contact tip of claim 1, wherein: the length of the extraction channel is 1-3 times of the aperture.