Adjustment method of thin-wall numerical-controlled bend-pipe forming die

Abstract

The invention discloses a numerically controlled method for adjusting the forming die of a bent pipe with thin wall. The forming die of the bent pipe comprises a bending die (1) fixed and coupled with a machine tool, a lock block (2), a fixture block (3), a mandrel (5) and a crease resistant block (4) with six degrees of freedom. The method for adjusting the forming die gradually adjusts and installs the die according to the destructiveness of each defect of the bent pipe and the effect of forming parameters on each quality parameter so as to acquire the qualified bent pipe which does not crease and has thinned wall and section distortion satisfying the requirements. The method can ensure the smooth process of the bending forming experiment of pipes with thin wall, and is used for guiding the forming of the bend of the pipe with thin wall and small bending radius in practical engineering, so as to reduce the die adjusting times, lower the production cost and satisfy the requirements of high-tech industries such as aeronautics and astronautics and the like.

Description

technical field [0001] The invention relates to the field of mechanical processing, in particular to a method for debugging a thin-walled numerical control bending pipe forming die. Background technique [0002] In the fields of aviation, aerospace and automobiles, the directional wall thickness factor of bent pipe parts is larger (wall thickness factor D / t, D-pipe outer diameter, t-pipe wall thickness) and the bending radius is smaller (relative bending radius R / D, R-bending radius) tends to develop, and the quality requirements for elbow forming are very strict. [0003] In the prior art, the debugging of pipe bending molds is carried out by trial and error method, which relies on the experience of operators and lacks scientific mold debugging methods, especially for the forming process of thin-walled pipes with large diameter and small bending radius. Defects such as instability wrinkling, excessive wall thickness reduction and section distortion are difficult to contro...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the debugging of pipe bending molds is carried out by trial and error method, which relies on the experience of operators and lacks scientific mold debugging methods, especially for the forming process of thin-walled pipes with large diameter and small bending radius. Defects such as destabilization wrinkling, excessive wall thickness reduction and section distortion are difficult to control

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