Manufacturing method of special-shaped pipe

Abstract

The invention discloses a method for manufacturing a special-shaped pipe. The method includes the following steps: Step 1: melting and casting; using a high-temperature device to melt the finished copper plate material from a solid state to a liquid state, extruding and forming a copper pipe blank through a mold, and oxidizing it The surface is oxidized and washed; step 2: compression, stretching, coil drawing and cutting; the hollow copper tube raw material is compressed into a hollow copper tube semi-finished product, and the diameter of the tube wall is from thick to thin. The semi-finished product is stretched, the stretching force is 300-400KN, the stretching speed is 120-180m / min, the diameter of the pipe wall becomes thinner, and the copper round pipe is transported to the coil drawing equipment for secondary stretching. Copper tubes are stretched into different diameters, and copper tubes of different diameters are cut according to classification. The invention adopts the production method of special-shaped tubes, which solves the problem that the refrigeration medium is not easy to circulate, has high production efficiency, saves resources, produces high-quality products, and can ensure smooth circulation of the refrigeration medium.

Description

technical field [0001] The invention relates to a non-ferrous metal processing method, in particular to a method for manufacturing integrated seamless special-shaped pipes with different diameters through process-based automatic operation. Background technique [0002] At present, most of the special-shaped pipes used in central air conditioners or household air conditioners are equal-diameter pipes. In order to overcome the shortcomings of the small diameter of the connecting pipes and the difficulty in circulating the refrigerant medium in the pipes during bending, an improvement has been made on this basis. Welding is used to make structures with different pipe diameters. Although this welding method solves the problem of non-circulation, it will cause leakage after a long time of welding, and there are potential safety hazards. In order to further overcome the above defects, how to make it into an integrated Forming, and the structure that can achieve different pipe diam...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the special-shaped pipes used in central air conditioners or household air conditioners are equal-diameter pipes. In order to overcome the shortcomings of the small diameter of the connecting pipes and the difficulty in circulating the refrigerant medium in the pipes during bending, an improvement has been made on this basis. Welding is used to make structures with different pipe diameters. Although this welding method solves the problem of non-circulation, it will cause leakage after a long time of welding, and there are potential safety hazards. In order to further overcome the above defects, how to make it into an integrated Forming, and the structure that can achieve different pipe diameters has become an urgent problem to be solved

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