Machining method of metal curved foot

Abstract

The invention discloses a machining method of a metal curved foot. The machining method comprises the steps that a metal pipe is selected and cut off; one end of the metal pipe is put into a pipe shrinking machine for secondary pipe shrinking; stamping a transition section between the secondary contracted pipe section and the non-contracted pipe section into a step surface; adding a first core rod into the secondary contracted pipe section in the curved foot, flattening, and carrying out solid solution heat treatment on the curved foot; one end of the curved foot is fixed, the other end of the curved foot is stamped, one end of the curved foot moves downwards, and a middle transition section is stamped into an s-shaped bent pipe through a straight pipe; the thread rolling machine is used for conducting thread machining on the two ends of the curved foot, it is guaranteed that when the curved foot is flattened, the roundness and straightness of the non-flattened section of the secondary shrinkage pipe section can be guaranteed, machined threads are full, torsion is guaranteed, solution treatment is added after the flattening process, internal stress generated in the previous procedure can be eliminated, and it is guaranteed that deformation and cracks are not generated in dislocation forming in the later procedure.

Description

technical field [0001] The invention relates to the field of metal pipeline processing, in particular to a method for processing metal curved legs. Background technique [0002] The curved feet made of existing metal pipes are generally prepared by: preparing stainless steel pipes, annealing the stainless steel pipes first, extruding the annealed stainless steel pipes in a plurality of different molds in turn to obtain rough billets of curved feet, and The rough billet is rolled, machined and polished separately to obtain the finished product with curved feet. However, this technology has many shortcomings. It is produced by multi-mould and multi-step extrusion method. In the flattening step, the straightness of both ends cannot be guaranteed, and the middle section of the curved foot forms an arc near the two ends of the straight line, so that the thread teeth are not full, and the torque cannot be guaranteed. Contents of the invention [0003] The purpose of the present...

AI Technical Summary

Problems solved by technology

[0002] The curved feet made of existing metal pipes are generally prepared by: preparing stainless steel pipes, annealing the stainless steel pipes first, extruding the annealed stainless steel pipes in a plurality of different molds in turn to obtain rough billets of curved feet, and The rough billet is rolled, machined and polished separately to obtain the finished product with curved feet. However, this technology has many shortcomings. It is produced by multi-mould and multi-step extrusion method. In the flattening step, the straightness of both ends cannot be guaranteed, and the middle section of the curved foot forms an arc near the two ends of the straight line, so that the thread teeth are not full and the torque cannot be guaranteed.

Images