Titanium alloy seamless pipe with variable wall thickness as well as radial forging and forming mechanism and method of titanium alloy seamless pipe

A variable-wall-thickness tube and radial forging technology, which is applied in the manufacture of tools, transportation and packaging, and metal processing equipment, can solve the problems of small deformation in each pass, low plasticity of titanium alloys, and complex processing methods frame weight, good surface quality, and high dimensional accuracy

Inactive Publication Date: 2012-10-03
天津轻钛运动器材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the thin-walled titanium alloy pipes that are difficult to process, although the cold rolling process can produce variable-wall-thickness pipes, the processing method is complicated, and it is impossible to prepare pipes with thick walls at both ends and thin walls in the middle; at the same time, due to the plasticity of titanium alloys Low, the amount of deformation is small, and it is difficult to process variable-wall thickness and thin-wall titanium alloy unequal-wall tubes by using the pumping technology

Method used

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  • Titanium alloy seamless pipe with variable wall thickness as well as radial forging and forming mechanism and method of titanium alloy seamless pipe
  • Titanium alloy seamless pipe with variable wall thickness as well as radial forging and forming mechanism and method of titanium alloy seamless pipe
  • Titanium alloy seamless pipe with variable wall thickness as well as radial forging and forming mechanism and method of titanium alloy seamless pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1 Preparation of titanium alloy tube TA18 with equal inner diameter and two-stage unequal wall tube

[0024] Use titanium alloy tube blank (φ42mm×2mm inner diameter φ38mm), first open the radial forging forming mechanism, put the thin-walled part 2 of the prepared tube body into the mold in advance, and insert the mandrel 4 (φ37.8mm) into the inside of the tube (The outer diameter of the mandrel rod and the inner diameter of the pipe are a clearance fit), and then the radial forging forming mechanism mold 3 is opened, so that the mold 3 plastically deforms the pipe wall along the radial direction of the pipe body, so that the wall thickness of the pipe body is thinned while extending along the axial direction. elongation, and the thick-walled part 1 of the pipe body does not participate in the forming. When the wall thickness of the thin-walled part 2 of the pipe body reaches 0.9mm, open the radial forging forming mechanism mold 3, take out the deformed pipe bod...

Embodiment 2

[0025] The preparation of the two-stage unequal wall tube TA2 of embodiment dititanium alloy inner diameter is equal

[0026] The method refers to the first embodiment, the difference is that the titanium alloy tube blank is changed to φ63mm×2.5mm, the inner diameter is φ58mm, and the mandrel 4 is changed to φ57.8mm.

Embodiment 3

[0027] Example 3 Preparation of titanium alloy inner diameter equal two-stage unequal wall tube TC4

[0028] The method refers to Example 1, the difference is that the titanium alloy tube blank is changed to φ22mm×1.5mm, the inner diameter is φ19mm, and the mandrel 4 is changed to φ18.8mm. At the same time, in order to improve the plasticity and pass processing rate of the material, the During the forging process, the titanium alloy tube billet and mandrel are heated at a temperature of 600°C.

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Abstract

The invention provides a titanium alloy seamless pipe with variable wall thickness as well as a radial forging and forming mechanism and a radial forging and forming method of the titanium alloy seamless pipe. The invention has the benefits as follows: a simple radial forging process is adopted; various seamless titanium alloy thin-wall pipes with variable wall thicknesses can be manufactured through core rods and the radial forging and forming mechanism; the manufactured pipes have the advantages of high size precision and good surface quality, and can meet the use requirements of bicycle frames and parts; and the weight of the frames can be reduced on the basis of not reducing the structural strength of the frames, so as to achieve the purpose of increasing the speed of bicycles.

Description

technical field [0001] The patent of the invention relates to the field of titanium alloy pipe manufacture, especially the variable-wall thickness thin-wall seamless pipe required by the titanium alloy bicycle frame and its parts and components, and its radial forging forming mechanism and method. Background technique [0002] Titanium alloy variable wall thickness seamless pipe is a product of variable diameter pipe. It can not only be used in the pipeline system to change the flow of the pipeline, but also can be used as a structural load-bearing part according to the different external loads, especially the titanium alloy pipe. Welding manufactures bicycle frames. [0003] In the past, variable-wall thick tubes and internal variable-diameter tubes for bicycle frames were mostly manufactured by cold rolling or cold drawing (that is, pumping technology). However, for the thin-walled titanium alloy pipes that are difficult to process, although the cold rolling process can p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62K19/02F16S3/00B21J5/02B21J7/02
Inventor 王俊萍卢亚锋赵彬孙文鸿张涛
Owner 天津轻钛运动器材有限公司
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