Method for processing collecting tube of heat exchanger

Abstract

The invention provides a method for processing a collecting tube of a heat exchanger, which is characterized in that: 1) the collecting tube is limited between a demoulding press block and a lower base, one or more sets of punching knives are arranged in the vertical direction right above the collecting tube, and one end of the collecting tube is connected with a slide block; and 2) when the punching knives press downward, and after one or more punching holes are punched, the punching knives move upward to be lifted, the slide block drives the collecting tube to move toward the front end, by taking the hole spacing of the collecting tube as a stepping stroke, when the collecting tube reaches the punching position of the next punching hole, the punching operation is repeated until all punching holes are punched. The inside of the collecting tube is provided with a core rod in order to avoid the inward caving of the punching holes. The method has the advantages that: the operating process is simple; and the size of the punching knives can be flexibly replaced according to the actual size of the punching holes, and the hole spacing of the punching holes is adjusted by the stepping distance of the slide block, so that the method is suitable for processing collecting tubes of the heat exchangers in different specifications as well as the mechanical mass production, and simultaneously saves a great deal of mould cost, punching equipment cost and operational cost.

Description

technical field [0001] The invention relates to the technical field of processing headers for heat exchangers, in particular to a flexible processing method for headers of all-aluminum brazing heat exchangers. Background technique [0002] Traditional household and commercial air-conditioning systems use mechanical expansion tube heat exchangers (commonly known as tube-fin heat exchangers) composed of round copper tubes and aluminum foils. This traditional heat exchanger has the advantages of low equipment investment and easy production. However, this kind of heat exchanger has disadvantages such as low heat exchange efficiency and large consumption of materials. As countries around the world pay more and more attention to energy crisis and environmental issues, the global air-conditioning industry has become more efficient, energy-saving, and environmentally friendly. As a key component for exchanging heat in air-conditioning systems, traditional tube-fin heat exchangers ca...

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned processing method has the following defects: poor versatility of the mold, hole spacing and hole size cannot be adjusted, a mold can only produce blank tubes shorter than the maximum processing size of the mould, and the length of the processed header is limited (currently can be processed The longest size is 1300mm), the product is poor in flexibility, and the cost of the mold is high; the investment of the punching machine matched with the mold is large; the mold replacement is complicated and time-consuming; the manifold is easy to bend and deform after processing

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