A manufacturing method of special-shaped thin-walled ring-controlled cold pipe

Abstract

The invention discloses a manufacturing process method of a special-shaped thin-wall environmental-control cold pipe. According to the method, the rapid, efficient and low-cost manufacturing of the special-shaped thin-wall environmental-control cold pipe can be achieved by rapidly forming a modified wax module through selective laser sintering technology and combining with a manufacturing processof gypsum type precise casting forming under vacuum pressure. The surface roughness of the special-shaped thin-wall environmental-control cold pipe can reach Ra3.2-6.3, the three-prevention treatmentrequirement is completely met, the size precision is high, and the assembly precision requirement can be well met. In addition, the tensile strength of the mechanical property reaches 300 MPa, and theintegral forming completely meets the strength use requirement. Compared with a traditional manufacturing process, the method has the advantages that the cost can be reduced by 40%, the first-batch development production period is only 1 / 5 of the production period of the traditional process method, the development production efficiency is greatly improved, and the product shaping period is shortened.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing and manufacturing, and in particular relates to a manufacturing process method of a special-shaped thin-walled ring-controlled cold pipe. Background technique [0002] Due to the limitation of the internal assembly space of the environmental control system, the constraints of the movement rules of the cold fluid, and the requirements for strength and weight, the cold pipe of the environmental control system is generally designed as a special-shaped pipeline; the wall thickness is relatively thin, generally 1 to 1.5mm; the size High precision requirements (±0.1mm); and long-term cold flow impact and external environment, the pipeline cannot crack and leak, and the surface requires three-proof chemical surface treatment, and the surface finish of the pipeline is required (Ra3.2~Ra6.3) . [0003] Special-shaped thin-walled ring-controlled cold pipes are very complicated due to the comp...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of long processing cycle, high processing cost and difficult precision realization of special-shaped thin-walled environmental-controlled pipes, the present invention proposes a manufacturing process method of special-shaped thin-walled environmentally-controlled cold pipes, which includes the following steps:

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