A double-row conjoined tube necking forming mold

Abstract

A double-row siamesed tube necking forming mould comprises an upper mould assembly and a lower mould assembly, wherein the upper mould assembly comprises an upper mould base and an upper mould plate fixed on the upper mould base; the upper mould base is connected with a cylinder; the lower mould assembly comprises a lower mould base, a lower mould plate fixed on the lower mould base, and a lower mould fixing plate; the upper mould plate is provided with positioning guide posts capable of being inserted into the lower mould fixing plate; two necking pressure blocks are oppositely arranged on the upper mould plate; opposite inclined planes are arranged at the lower ends of the two necking pressure blocks respectively; necking devices are arrange on the two sides of the lower mould plate respectively; each necking device comprises a necking mould fixing plate and a necking mould running through the necking mould fixing plate; grooves matched with the lower ends of the necking pressure blocks in shape are formed in the necking moulds; return springs capable of pressing against the necking mould fixing plates sleeve the necking moulds. By pressing down the upper mould assembly, the inclined planes on the necking pressure blocks push the two necking moulds to do synchronous relative movement to synchronously neck a double-row siamesed tube, so that a product has good symmetry and consistency.

Description

technical field [0001] The invention belongs to the technical field of flat tube processing, and in particular relates to a double-row conjoined tube necking forming die. Background technique [0002] At present, the evaporators used in automobile air conditioners in my country are mostly composed of aluminum alloy porous flat tubes and cooling fins and other components through brazing. The structure of the evaporator and the condenser is basically the same, the difference is that the length is shorter and the thickness is thinner. Some, the number of holes in the flat tube is more, and the size is more compact. The assembly method is generally two flat tubes arranged in parallel, and the cooling fins are brazed and connected. During assembly, the requirements for the cooperation of each component are very high. At the same time, when a single flat tube is combined into two parallel tubes, it increases The assembly time is also very demanding on the assembly process. [000...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the above problems, in response to the continuous technical innovation and cost reduction requirements of evaporator manufacturers in recent years, there has been a combination of two independent flat tubes, and a double-row conjoined tube suitable for air-conditioning evaporators has been developed, which can Effectively improve assembly efficiency, however, the resulting problem is that there is no mature and efficient equipment to complete the necking process of double-row conjoined pipes, and the shrinking process of double-row conjoined pipes is mostly done manually, which is inefficient , unable to adapt to industrial production, and for some equipment that can complete the shrinking process of double-row conjoined pipes, the symmetry of the processing is poor, the defective rate is high, and it cannot be put into large-scale production

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