Special welding fixture for copper aluminum tube and welding method and copper aluminum welded tube utilizing the same

Abstract

The invention discloses a special welding fixture for a copper aluminum tube, which comprises a grinding and cutting clamping mould capable of being used for welding positive and negative electrodes, and a sole plate clamping mould; the grinding and cutting clamping mould is divided into an upper mould and a lower mould, the upper mould and the lower mould are of symmetrical structures, and the upper mould and the lower mould respectively comprise clamping main bodies on the back segments thereof and grinding and cutting cutters on the front ends thereof; the sole plate clamping mould is divided into an upper mould and a lower mould, and a rigid cushion block is arranged on the front end of a position touching a tubular product of the sole plate clamping mould. A copper aluminum welded tube produced by the special welding fixture for copper aluminum tube comprises a copper tube with a bell mouth-shaped front end and an aluminum tube, the front end of the copper tube is stretched into the inner wall of the aluminum tube, and reinforcement ribs with fin-shaped structures formed by molten aluminum are arranged on the outer wall of the aluminum tube. The special welding fixture disclosed by the invention has the advantages of guaranteeing a smooth welding surface, saving the working procedure, reducing the demand on production field, greatly improving the production efficiency, reducing the production cost, guaranteeing a more smooth production process, effectively relieving the fixture attrition, prolonging the service life of the grinding tool, improving the strength of the key combination position, and enhancing the qualified rate and quality of the products.

Description

technical field [0001] The invention relates to a welding equipment for copper-aluminum welding pipe fittings and a production method and products of copper-aluminum welding pipes using the equipment, in particular to a welding fixture used for welding pipe fittings and its operation production method and products. Background technique [0002] In recent years, due to the depletion of copper resources, the price of copper has continued to rise, which has promoted the technological progress of replacing copper with aluminum and the market application scope of related industries. my country is a country that is extremely short of copper resources and relatively rich in aluminum resources. At present, a large number of copper pipes are used in the refrigeration industry. It has become a very important topic to reduce manufacturing costs by changing copper materials to aluminum materials, and breakthroughs have been made. [0003] In the prior patents 200710145755.0 and 20082001...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of low production efficiency and high production cost due to the generation of burrs, welding slag and fin-like structure in the production process of the existing copper-aluminum welded pipe, which requires a lot of post-processing work, and provides a Novel copper-aluminum pipe welding special fixture, production method and product thereof

Images