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Current-assist hot spinning forming method for titanium and titanium alloy

A spinning forming and titanium alloy technology, applied in forming tools, metal processing equipment, manufacturing tools, etc., can solve the problems of poor performance and high cost of parts, and achieve the effect of short heating time, fast heating speed and uniform temperature

Inactive Publication Date: 2013-01-30
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of high cost and poor performance of processed parts in the current hot spinning method of titanium and titanium alloy hot spinning. The present invention provides a current-assisted hot spinning of titanium and titanium alloy. method

Method used

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  • Current-assist hot spinning forming method for titanium and titanium alloy

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specific Embodiment approach 1

[0022] Specific implementation mode one: combine figure 1 Describe this embodiment, the current-assisted hot spinning method of titanium and titanium alloy described in this embodiment, it comprises the following steps:

[0023] Step 1: One end of the mandrel 3 is coaxially fixedly connected to the main shaft 9 of the cold spinning machine, and the mandrel 3 is kept insulated from the main shaft 9 of the cold spinning machine;

[0024] Step 2: The thin-walled tube blank 2 of uniform thickness formed by titanium or titanium alloy is placed on the outer surface of the mandrel 3 and fixedly connected, and the inner diameter of the thin-walled tube blank 2 is 0.2-0.4mm larger than the outer diameter of the mandrel 3;

[0025] Step 3: set electrode 6 and power supply 7 at one end of thin-walled tube blank 2, the other end of electrode 6 is frictionally connected with thin-walled tube blank 2, and roller 8, electrode 6 and thin-walled tube blank 2 are connected in series at the outp...

specific Embodiment approach 2

[0037] Embodiment 2: This embodiment is a further limitation of the current-assisted hot spinning method for titanium and titanium alloys described in Embodiment 1.

[0038] The method of coaxially fixedly connecting one end of the mandrel 3 with the main shaft 9 of the cold spinning machine described in step 1 is as follows: use a bolt to pass through the inner surface of the mandrel 3 to be fixedly connected to the inner surface of the mandrel 3, and the bolts One end is fixedly connected with the holder 1, and the other end of the bolt is fixedly connected with the main shaft 9 of the cold spinning machine.

[0039] In this embodiment, the clamper 1, the mandrel 3 and the bolt are combined to form a titanium and titanium alloy forming mold, and the mandrel is placed inside the thin-walled tube blank 2 to be formed. At the same time keep the holder 1, the mandrel 3 and the bolts insulated from the cold spinning machine.

specific Embodiment approach 3

[0040] Embodiment 3: This embodiment is a further limitation of the current-assisted hot spinning method for titanium and titanium alloys described in Embodiment 1.

[0041]In Step 1, the method for maintaining insulation between the mandrel 3 and the main shaft 9 of the cold spinning machine is to achieve insulation through high-temperature-resistant mica sheets, ceramics, asbestos rubber sheets, and polytetrafluoroethylene.

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Abstract

The invention discloses a current-assist hot spinning forming method for titanium and titanium alloy and relates to a hot spinning forming method for the titanium and titanium alloy. The invention aims to solve the problems that the cost is high, and processed parts are not good in performance by adopting the hot spinning forming method for the titanium and titanium alloy for a hot spinning machine at present. According to the current-assist hot spinning forming method for the titanium and titanium alloy, a thin-walled tube blank per se is directly heated by utilizing Joule resistance heat produced when current flows through the thin-walled tube blank, and the temperature of the thin-walled tube blank is kept within a hot forming temperature range; then, certain pressure is applied to the thin-walled tube blank through a pressure device to enable the thin-walled tube blank to produce plastic deformation, and therefore, not only is heat loss consumed on other components in the method because of integral heating in a traditional plastic hot forming process avoided but also the heating process is very rapid, the distribution of the internal temperature of the thin-walled tube blank is very even, and the use ratio of energy and the heating efficiency are greatly improved. The current-assist hot spinning forming method for titanium and titanium alloy is used for performing spinning forming on the titanium and titanium alloy.

Description

technical field [0001] The invention relates to a hot spinning forming method of titanium and titanium alloys, in particular to a current-assisted hot spinning forming method of titanium and titanium alloys. Background technique [0002] Metal spinning forming technology is an advanced plastic processing technology that combines the characteristics of forging, stretching, extrusion, bending, ring rolling, cross rolling and rolling. forming technology. This forming technology has the advantages of good deformation conditions, high product performance, high dimensional accuracy, high material utilization rate, wide range of products, and can be made into integral seamless hollow rotary parts, etc. It is especially suitable for forming difficult-to-deform metals with poor plasticity. [0003] Titanium alloy is a difficult-to-deform metal, because of its high specific strength, corrosion resistance, weldability, and good environmental compatibility, it has been widely used in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D22/16B21D37/16
Inventor 王国峰蒋少松卢振张凯锋苑世剑刘钢
Owner HARBIN INST OF TECH