Hydraulic pressure tube expanding device

Abstract

The invention relates to cooling part machining equipment, in particular to a hydraulic pressure tube expanding device. According to the hydraulic pressure tube expanding device, a water swelling gunhead is driven by an air cylinder to be inserted into a drain tube end port, the high impermeability can be ensured, meanwhile, the stability of tube expanding is increased, and the phenomenon of falling off is avoided. Through direct compressing connection of the water swelling gun head and the drain tube end, repeated connection and disassembly can be carried out. Meanwhile, according to the hydraulic pressure tube expanding device, restriction on a drain tube is reduced, tube expanding can be conducted on the multiple models of drain tubes, and the range of application of the device is enlarged. Through hydraulic pressure tube expanding, heat produced from tube expanding can be taken away while tube expanding is conducted. The tube wall temperature does not rise basically after tube expanding, and thermal stress can not be generated. Tube expanding is conducted by means of a water expanding mode, and the attaching rate of a fin and the drain tube is greatly improved. Inner screw threads on the inside wall of the drain tube are not destroyed, the tube expanding precision is improved, and the product quality and performance are ensured.

Description

technical field [0001] The invention relates to refrigeration accessories processing equipment, in particular to a hydraulic tube expansion device. Background technique [0002] In the production industry of two refrigerators, the expansion of the evaporator tube is generally done mechanically through the expansion rod to drive the expansion head. The evaporator tube is generally a smooth tube with an inner wall. However, with the development of society, the industry With the intensification of competition, the performance requirements for refrigerators and refrigerators are getting higher and higher. More and more refrigerators and refrigerators are beginning to use internal threaded pipes, and the inner wall of the internal threaded pipes is toothed at a certain height. Expansion of the internally threaded pipe by traditional mechanical methods will reduce the tooth height or destroy the teeth in the internally threaded pipe, thus affecting the performance of the two refri...

AI Technical Summary

Problems solved by technology

Expansion of the internally threaded pipe by traditional mechanical methods will reduce the tooth height or destroy the teeth in the internally threaded pipe, thus affecting the performance of the two refrigerator products. In order to solve this technical problem, a water expansion machine has been developed to Compression-expanding inner-threaded pipe can avoid damage to inner-threaded pipe teeth by mechanical expansion, thus ensuring the performance of the two refrigerator products

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