Method for forming ultra-thin stainless steel bend pipe

Abstract

The invention relates to a method for forming an ultra-thin stainless steel bend pipe. The method comprises the following steps: selecting hollow stainless seamless steel pipe as raw blank, regulating the clearance between a core head and the pipe to reduce the thickness reduction of the bend pipe and prevent corrugation; sleeving the seamless steel pipe in a forming mold core rod, regulating the technology parameters such as mandrel extension; mounting three mold core heads on a mandrel, wherein the distance between the mold core heads is in the range of 4-8 mm and thus the core heads can flexibly rotate; combining a clamping block and an insert block and fixing and clamping the pipe, guaranteeing the center of the pipe paralleled to the center of the mandrel by regulating the transverse pressure and increasing the friction force between the clamping block and the pipe; combining a push aid block and an anti-corrugation block, allowing a roller to rotate, forming a bend part, wherein the push aid speed of the push aid block is equal to the maximum linear velocity of the roller; bending the pipe to 90 degrees, lifting up the insert block and the push aid block, separating the insert block and the push aid block from the clamping block and the anti-corrugation block, and taking the formed bend pipe from the mandrel.

Description

[0001] technical field [0002] The invention relates to a method for forming an ultra-thin stainless steel elbow, which belongs to the technical field of mechanical processing. Background technique [0003] In aerospace, automobile manufacturing industry and other fields, reducing the structural weight and improving the reliability of parts has become the development trend of modern advanced manufacturing technology. Among them, the ultra-thin elbow (the wall thickness of the pipe is less than 1mm) is one of the important parts of the pipeline system of large passenger aircraft, transport aircraft and large rockets. The traditional manufacturing process is to stamp two half-pipes and then weld them. There are two longitudinal welds. In the process of pressing the half-side pipe, due to the large deformation of the material, the wrinkling of the pipe is serious, and the roundness of the part after forming is out of tolerance. The follow-up needs to be manually corrected and...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the deficiencies of the existing technology, the method of the present invention aims to solve the technical problems such as distortion, wrinkling, out-of-roundness, and low production efficiency of parts generated during the bending and forming process of the existing stainless steel ultra-thin tube.

Images