The Second Radial Inner Ring Forming Process of the Inner Wall of Thin-walled Tube

Abstract

The invention discloses a process for forming a second radial inner ring on the inner wall of a thin-walled cylinder. The process includes the steps that (1) a semi-finished product with a first radial inner ring being formed in an upset-extruding mode is placed in a forming die; (2) a core die and a pressing die are mounted in an inner cavity of the thin-walled cylinder located in place, the opening of the thin-walled cylinder is subjected to upset-extruding through the pressing die to be plastically deformed, and overflowing metal is jointly limited by the core die and the pressing die to form one section of the second radial inner ring; (3) the core die and the pressing die are synchronously transferred to the next station along the inner wall of the thin-walled cylinder; (4) the pressing die conducts upset-extruding on the new station, another section of the second radial inner ring is formed, and upset-extruding is executed section by section in sequence; and (5) the core die moves inwards in the radial direction, a finished product is taken out, and another semi-finished product to be machined is placed in the forming die. According to the process, the method that upset-extruding is conducted section by section and forming is gradually achieved is adopted, upset-extruding forming of the thin-walled cylinder with the two internal radial inner rings is achieved, the upset-extruding process which breaks up the whole into parts is simple and convenient, and production can be easily organized.

Description

technical field [0001] The invention relates to a technology in the field of metal plastic forming, in particular to an upsetting extrusion forming process, especially a forming process for upsetting and extruding a second radially inner ring on the inner wall of a thin-walled cylinder. Background technique [0002] Thin-walled tube parts are parts of conventional structures and are used in many occasions. Under the existing technical conditions, the manufacturing process of thin-walled tube parts with radial inner rings on the inner wall mainly includes cutting forming and casting forming. The most widely used in the manufacturing industry today is the mechanical cutting forming process. The initially formed blank can be machined to obtain high-precision dimensions and related shape and position tolerances. However, in addition to the large amount of cutting, the material utilization rate of the mechanical cutting forming process is also very low. The biggest disadvantage ...

AI Technical Summary

Problems solved by technology

[0003] The present invention mainly aims at the problem that the existing technology cannot realize the upsetting and extrusion forming process of the thin-walled tube with two built-in radial inner rings. Two-pass Radial Inner Ring Forming Process

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