Numerical control differential heating bending forming mould for titanium tube and method

A technology of differential temperature heating and bending forming, applied in the direction of forming tools, manufacturing tools, metal processing equipment, etc. Distribution and thermal bending reasonable temperature distribution differences and other issues to achieve the effect of avoiding uneven temperature, increasing temperature, and improving heating efficiency
CN105537342AActive Publication Date: 2016-05-04NORTHWESTERN POLYTECHNICAL UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
NORTHWESTERN POLYTECHNICAL UNIV
Publication Date
2016-05-04

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Abstract

The invention discloses a numerical control differential heating bending forming mould for a titanium tube and a method. The numerical control differential heating bending forming mould for the titanium tube is characterized in that heating holes and thermometer holes are formed in a pressure mould, a bending mould, a mandril and a crease-resistant mould respectively; and thermometer holes are formed in a clamping mould and an insert block; the pressure mould, the mandril, the bending mould and the crease-resistant mould are heated, and the heating temperatures are set according to tube hot bending simulated reasonable temperature distribution. Compared with the prior art, the moulds and the tube can be heated to the set temperatures faster, the heating efficiency of the tube is improved, temperature nonuniformity is avoided, the bending forming quality and forming limit of a titanium alloy tube are further improved and increased, and a machine tool is protected by a heat insulating plate. After the tube is bent within the forming limit, the inner side of the tube does not crease, the surface of the tube has no scratch, a reduction rate of the wall thickness of the outer side of the tube is less than 17%, and a section flattening rate of the tube is less than 5.0%, so that the requirements of an airplane on a small-bending-radius elbow tube made of major-diameter thin-wall pure titanium tube can be met.
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Description

technical field

[0001] The invention relates to the field of numerically controlled processing and forming of pipe materials, in particular to a method for bending and forming titanium pipes by numerically controlled differential temperature heating and a mold. Background technique

[0002] CNC pipe bending technology is an advanced pipe bending forming technology produced by combining traditional pipe bending technology with numerical control technology. It can meet the requirements of high precision, high efficiency and digital processing for pipe bending parts. It occupies a leading position in high-tech fields such as aviation and aerospace. important position and shows broad application prospects. Titanium alloy elbow fittings are light in weight and can withstand high working pressure. They are used in pipeline systems such as fuel oil and air conditioning, and can meet the urgent needs of advanced aircraft development for high performance, light weight and high effici...

Claims

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