Inner-complex cooling pipe and method for producing the same

Abstract

The invention discloses an inner-complex cooling pipe, which comprises an outer pipe and an inner pipe, wherein the inner pipe is positioned in the outer pipe, and an even number of axial channels which are not connected with each other are arranged between the outer wall of the inner pipe and the inner wall of the outer pipe. The invention also discloses a method for producing the inner-complex cooling pipe. A product produced by drawing has high surface finish; rounded smooth transition is adopted among various surfaces of a workpiece to ensure product ventilation and water smooth and to meet use requirement to the maximum; the product is formed by one-time stretch and has high size precision, few errors and convenient assembly; the qualification rate of the product is increased by 55 percent; and the product has short production period, high output and low cost. Compared with the conventional production process, the staff are reduced by 20 percent, the electricity bill is reduced by 10 percent, and copper materials are saved by 25 percent; the production cost of a producer is reduced to the maximum and the cost performance of the product is improved by using a drawing method to produce a four-channel complex product and the price is only about 38 percent of that of a foreign similar product, thereby really achieving the aim of high efficiency and energy conservation.

Description

technical field [0001] The invention relates to a water cooling pipe for a welding torch in the welding and cutting industry, in particular to an inner composite cooling pipe and a manufacturing method thereof. Background technique [0002] When the water-cooled welding torch is working, the temperature of the welding head reaches 2000-3000°C. In order to ensure its normal operation, a water cooling pipe is needed to pass water for cooling. When cooling, water enters from the water inlet channel, after heat exchange, after cooling, it flows out from the return water channel, so as to realize the cooling of the welding head of the welding torch. [0003] The water cooling pipe of existing torch is usually such as figure 1 The outer composite pipe shown, such as the four-channel outer composite pipe, generally uses copper with good thermal conductivity as the base material. At present, the manufacturing method of the four-channel external composite copper tube is: use a copp...

AI Technical Summary

Problems solved by technology

The traditional production process has the following problems: 1. After the copper tube is processed by a milling machine, its surface finish is poor, which is not conducive to the circulation of air and water

2. Since the milling machine can only mill one slot at a time, each product needs to be processed four times to complete, so the processing accuracy is low and the cumulative error is large, which is not conducive to the assembly of the finished product and the pass rate of the product is low

3. Limited by the performance (length) of the milling machine, the length of each processed product is short, so the output is low, the production cycle is long, and the production cost is high

4. The use of milling machines will produce a large amount of copper shavings, and the cost of materials will increase, resulting in a serious waste of manpower, material resources and resources

Affected by processing tolerances, there will be a gap when the outer sleeve and the four-slot tube are assembled, and the cold and hot water will collude during use (commonly known as short circuit), and the cooling effect is poor

Images