A processing method for flaring and forming stainless steel small-diameter thin-walled pipe fittings

Abstract

The invention discloses a processing method for flaring and forming of stainless steel small-diameter thin-walled pipe fittings. It includes the following steps: a. Flatten the end face of the pipe fitting, and the cutting surface of the pipe fitting is at a right angle of 90°±0.2° to the axis of the pipe fitting to obtain product A; b. Perform solid melting treatment on the pipe fitting of product A to obtain product B; c. Remove product B The orifice of the pipe fitting and the burr in the hole, and the part of the pipe to be flared is cleaned to obtain product C; d. Use the tube clamp to clamp the pipe fitting of product C, and use the flared top cone to gradually expand the pipe fitting of product C to obtain Product D; e, carry out stress relief treatment on the pipe fittings of product D to obtain product E; f, carry out flat grinding on the pipe fittings of product E to obtain product F; g, put the pipes formed by the expansion of the pipe fittings of product F into the correction mold for correction Cone surface, finished product. The present invention has the diameter of the tube mouth, the taper of the flared surface, and the flatness of the tube mouth of the pipe fitting formed by flaring to a taper of 74°, which can meet the design requirements, and the qualified rate of the product is greatly improved.

Description

technical field [0001] The invention relates to a processing method for flaring a stainless steel small-diameter thin-walled pipe fitting made of 1Cr18Ni9Ti, in particular to a processing method for flaring a stainless steel small-diameter thin-walled pipe fitting to a taper of 74°±0.5°. Background technique [0002] Stainless steel small-diameter thin-walled pipe fittings are flared to a taper of 74°±0.5°. Due to the complex space structure of aviation 1Cr18Ni9Ti pipe fittings, the pipe fittings cannot be clamped on the machine tool, resulting in the inability to use machining methods to flaring the pipe fittings. The pipe fittings can only be flared and formed by manual processing. In addition, due to the problem of pipe clamping, cracks in the flared part, uneven thickness of the flared part, and unqualified dimensions, the qualified rate of the pipe fittings after forming is very low. Contents of the invention [0003] The object of the present invention is to provide...

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Problems solved by technology

[0002] Stainless steel small-diameter thin-walled pipe fittings are flared to a taper of 74°±0.5°. Due to the complex space structure of aviation 1Cr18Ni9Ti pipe fittings, the pipe fittings cannot be clamped on the machine tool, resulting in the inability to use machining methods to flaring the pipe fittings. Only manual processing can be used to flaring the pipe fittings

Due to the problem of pipe clamping, cracks in the flared part, uneven thickness of the flared part, and unqualified dimensions, the qualified rate of the pipe fittings after forming is very low.

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