Section bending blank manufacturing method of iron-based high temperature alloy flash welding thin wall ring piece

Abstract

The invention discloses a section bending blank manufacturing method of an iron-based high temperature alloy flash welding thin wall ring piece. The method includes the following steps: dividing an iron-based alloy section which is fed in specification into five sections including an mn section, an no section, an op section, a pq section and a qw section, heating the sections to the temperature of 670+-20 DEG C, installing the sections into a bending machine to be located, first bending the op section, enabling the wire rotating speed of an upper roller and two lower rollers of the bending machine to be 2400mm / min and the upward moving speed of the two lower rollers to be 6.0mm / min, repeatedly bending the section for 5 times at the moment when the op circular section reaches preset curvature radius, then bending the no section and the pq section, utilizing the wire rotating speed of the upper roller and the two lower rollers to be 1200mm / min and the upward moving speed of the two lower rollers to be 7.6mm / min, repeatedly bending the sections for 5 times at the moment when the no circular section and the pq circular section to reach the preset curvature radius. The section is bent and transformed into a 'D'-shaped ring blank. Two straight sides of the ring blank are connected with the transition circular section through the circular portion, and corner bending produced by connection of the two straight sides and the circular portion and impresses produced on the surface of the ring blank are removed.

Description

technical field [0001] The invention relates to a profile bending method, in particular to a profile bending blank-making method for an iron-based superalloy flash welding thin-walled ring. Background technique [0002] With the increasing demand for rings in industries such as aviation, aerospace, ships, gas turbines, wind energy, nuclear energy, and bearings, rings formed by traditional rolling methods not only waste a lot of materials due to large machining allowances and low material utilization , but also keeps the cost of ring parts high. The ring parts produced by the flash welding process have less machining allowance, high material utilization rate, and greatly reduce the cost, which is conducive to the development of ring forming technology in the direction of precision forming technology. The preparation technology of flash welding ring blank is one of the key technologies for producing flash welding ring parts. [0003] In the prior art, the following methods a...

AI Technical Summary

Problems solved by technology

In the flash welding ring blank prepared by the above method, corners will be formed at the junction of the circular arc part of the ring blank and the straight edge parts at both ends, and indentations will easily occur on the surface of the ring blank; the ring blank is formed into a ring by flash welding After bulging, it is necessary to carry out bulging and rounding treatment. During bulging, stress concentration is likely to occur at the corners and the ring will be swollen and cracked, resulting in the scrapping of the ring. When correcting the circle, it takes a lot of man-hours and energy to trim the corners, and it cannot be completely Elimination, the overall ellipticity of the ring after calibration is large; due to the small machining allowance of the flash welded ring, the large ellipticity of the ring and the indentation on the surface will affect the dimensional accuracy of the ring, resulting in low dimensional accuracy. It is beneficial to obtain flash welding ring parts with less and no allowance processing

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