Micro-channel pipe forming die and method

Abstract

The invention provides a micro-channel pipe forming die and method, and relates to the field of die forming, the micro-channel pipe forming die comprises a die main body, the die main body is provided with a feeding channel, a welding chamber and a forming channel which are communicated in sequence, multiple stages of shunting channels which are communicated in sequence are formed in the feeding channel, and a die core neck is arranged in the welding chamber; one end of the mold core neck is connected with a mold core composed of a series of sub-mold cores distributed in an array mode, the mold core stretches into the forming channel, an inner wall channel communicated with gaps of the sub-mold cores and the flow dividing channel is formed in the mold core neck, and an outer wall channel communicated with the flow dividing channel and the forming channel is formed between the mold core neck and the welding chamber; aiming at the problem that the quality requirement is difficult to meet when the micro-channel pipe is extruded and formed through a die at present, a multi-stage shunting channel is adopted to promote blank flowing so as to reduce the die stress, and meanwhile, flow guide channels are correspondingly arranged on the outer wall and the inner wall of the micro-channel pipe so as to promote the flowing uniformity of a deformation material and reduce the distortion of a profile; and the structural size of the formed micro-channel pipe is ensured to meet the precision requirement.

Description

technical field [0001] The invention relates to the field of mold forming, in particular to a microchannel tube forming mold and method. Background technique [0002] The heat dissipation components in traditional refrigeration systems have problems such as poor heat dissipation, short life and poor stability, making it difficult to manufacture products that meet energy efficiency standards. In recent years, microchannel tubes have gradually been used as heat dissipation elements to replace traditional heat dissipation elements in aerospace, lightweight vehicles, 3C electronics, and household appliances. The materials used in this microchannel tube are mostly non-ferrous metal materials such as aluminum, copper, magnesium and their alloys. Compared with traditional heat dissipation elements, microchannel tubes are small in size and high in heat dissipation efficiency, which can meet higher energy efficiency standards. The heat exchange medium can be water, oil, and coolant....

AI Technical Summary

Problems solved by technology

The heat dissipation efficiency and volume of a single-row channel structure still cannot meet the cooling and heat dissipation requirements, so multiple rows of micro-channel tubes have gradually appeared to improve heat dissipation efficiency and reduce volume, such as Figure 1 shows the frequency conversion module micro-channel heat dissipation aluminum substrate in the household air conditioning refrigeration system, etc.

This kind of micro-channel tube is generally produced by hot extrusion, but the forming die of single-row micro-channel tube is not suitable for the extrusion of multi-row micro-channel tube. There are complex inner wall structures inside the multi-row micro-channel tube. It is difficult to control the flow of material in the mold during die extrusion, which makes it difficult to effectively form the internal structure corresponding to the multi-row micro-channel tubes; and there are still many problems when the multi-row micro-channel tubes are formed by extrusion. First, the billet flow It is more difficult and the mold stress is higher, which leads to the reduction of mold life; second, the unbalanced flow of the billet causes serious distortion of the profile, and the poor forming quality results in a low yield; The deflection causes the extruded microchannel tube to have a partial wall phenomenon, which makes it difficult for the dimensional accuracy of the microchannel structure to meet the standard

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