Long-acting electric conduction nozzle

Abstract

The invention discloses a long-acting electric conduction nozzle comprising a ceramic cap, an electric conduction inner core and a tailstock, wherein the ceramic cap is in a hollow structure and is provided with a first through hole at the front end; the electric conduction inner core is arranged in the ceramic cap which is protected at the outside of the electric conduction inner core; the tail part of the electric conduction inner core is a connection part which is provided with a second through hole in the center; the front surface of the connection part is connected with two symmetricallyarranged connection pieces, the front end of each connection piece is connected with a clamping block, and the two clamping blocks form a grip holder; the rear end of the connection part is sleeved with the tailstock in which a third through hole is arranged; and the rear end of the ceramic cap is sleeved on the front end of the tailstock. The invention stops the phenomena of splashing, adhering,blocking, arcing and burning the electric conduction nozzle, reduces the time for clearing away and replacing the electric conduction nozzle, lowers the labor intensity, and improves the working efficiency; stable current, filament extrusion without swinging and carbon dioxide gas directly blowing towards an electric arc are beneficial to improving the quality of products, and the service life ofthe long-acting electric conduction nozzle is prolonged by 8 times.

Description

Technical field: [0001] The invention relates to a conductive tip for metal welding in the mechanical industry, in particular to a long-term conductive tip. Background technique: [0002] Since the carbon dioxide welding technology has been used for many years, there are many technical problems that people hope to solve in the use of the contact tip, and some problems are even troublesome. However, these problems have not yet achieved breakthroughs and at the same time obtained thorough and effective solutions, such as: [0003] 1. The spatter is easy to stick and accumulate on the welding tip, which not only affects the protection of the carbon dioxide gas to the arc, but the spatter will be connected to the protective cover when it accumulates to a certain extent, and it is very easy to touch the arc, causing a short circuit to burn the contact tip. Use anti-blocking Dosage not only adds trouble, increases cost, and effect is also not very satisfactory. For this reason, ...

AI Technical Summary

Problems solved by technology

According to rough statistics, 8 hours of working time per day, depending on the welding parameters used, need to clean up the spatter about 15-20 times, which is very troublesome and greatly affects the production efficiency

[0004] 2. The plating layer or dust and other sundries that come off from the welding wire can easily block the inner hole of the conductive tip, causing the welding wire to be stuck and unable to feed the wire, and the welding is forced to be interrupted. Remove the conductive tip to dredge the inner hole or replace the conductive tip, which seriously affects production efficiency.

[0005] 3. In order to make the welding wire pass through the inner hole of the welding tip smoothly, the diameter of the inner hole of the contact tip must be processed larger than the diameter of the welding wire, so that the following problems arise: First, irregular shaking occurs when the welding wire is drawn out, especially After the wear of the inner hole becomes larger, the swaying range is larger, which increases the difficulty for the operator to control the accuracy of wire feeding, and affects the welding shape and weld quality; second, the welding wire and the inner hole of the contact tip are in loose contact, and poor contact sometimes causes It is a pity that the new contact tip is burnt at the beginning of the arc, which is a serious waste; third, the poor contact causes the current to be unstable and affects the welding quality; fourth, because the inner hole of the contact tip itself is larger than the diameter of the welding wire, it cannot provide certain A large amount of material is used for its wear, which itself cannot have a long life; in addition, poor contact will also cause electric sparks between the welding wire and the inner hole to ablate or produce melt accumulation (this phenomenon mainly occurs at the tip of the contact tip 7 mm In the range of left and right), once it occurs, it will further aggravate the poor conduction phenomenon or cause blockage, which will seriously affect the life of the contact tip

[0006] 4. Since the contact tip is very close to the welding area, the high temperature radiation of the arc and the molten pool, the contact tip works at a very high temperature, which makes the hardness and wear resistance of the contact tip material drop sharply, which is why the contact tip cannot have a long life one of the important factors of

However, due to the complexity of the carbon dioxide contact tip and the limitations of the gun body, the above problems have not been effectively solved at the same time

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