Method for reducing deformation residual stress of straight cylinder part in powerful spinning process

A powerful spinning and residual stress technology, used in applications, household appliances, hollow objects, etc., can solve the problems of deformation of parts, affecting the accuracy and stability of workpieces, changes in stiffness characteristics of workpieces, etc., to improve dimensional accuracy, improve machining accuracy and Production efficiency, high-quality spinning effect

Active Publication Date: 2022-04-29
XIAN TAIJIN INDAL ELECTROCHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, various factors will affect the release path and release sequence of the original residual stress during the processing process, resulting in changes in the different stiffness characteristics of the workpiece, resulting in different degrees of deformation of the parts
After the machining is finished, the deformation process of the parts is still going on, which will inevitably affect the accuracy and stability of the workpiece.

Method used

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  • Method for reducing deformation residual stress of straight cylinder part in powerful spinning process

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] This embodiment provides a method for reducing the residual stress of the deformation of the straight cylinder during the powerful spinning process, which specifically includes the following steps:

[0023] Step 1. Select the blanks of cylindrical parts that meet the requirements;

[0024] Step 2. Set the thinning rate of strong spinning to ≥50%, and set the appropriate deformation pass according to the thickness of the blank. Note that the deformation amount of the first pass needs to be determined in conjunction with the actual thinning amount of the workpiece to avoid straight tube parts Cracks appear on the inner wall during subsequent deformation;

[0025] Step 3. According to the spinning pass ratio and thinning rate proposed in step 2, draw spiral dents on the inner wall of the straight cylinder on the lathe, the dent depth is 1mm, and the distance between adjacent lines is 50mm;

[0026] Step 4, performing spinning deformation on the straight tube blank process...

Embodiment approach

[0028] As an optional or preferred embodiment of the present invention, the material of the straight cylinder is pure titanium.

[0029] As an optional or preferred embodiment of the present invention, when the material of the straight cylinder is pure titanium, the grain size of the blank is required to be ≥ grade 6; the hardness HB ≤ 130; the deviation of roundness ≤ 0.5 mm; the deviation of straightness ≤ 0.5mm; wall thickness ≤ 60mm; outer diameter ≤ 3500mm; height ≥ 1000mm.

[0030] Wherein, the pitch of the dents drawn in the step 3 is related to the ratio of spinning passes, and the width of the dents decreases when the ratio of spinning passes increases.

Embodiment 2

[0032] This embodiment provides a method for reducing the residual stress of the deformation of the straight cylinder during the powerful spinning process, which specifically includes the following steps:

[0033] Step 1. Select the blanks of cylindrical parts that meet the requirements;

[0034] Step 2. Set the thinning rate of strong spinning to ≥50%, and set the appropriate deformation pass according to the thickness of the blank. Note that the deformation amount of the first pass needs to be determined in conjunction with the actual thinning amount of the workpiece to avoid straight tube parts Cracks appear on the inner wall during subsequent deformation;

[0035] Step 3. According to the spinning pass ratio and thinning rate proposed in step 2, draw spiral dents on the inner wall of the straight cylinder on the lathe, the dent depth is 2mm, and the distance between adjacent lines is 100mm;

[0036] Step 4, performing spinning deformation on the straight tube blank proces...

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Abstract

The invention belongs to the technical field of spinning forming, and relates to a method for reducing deformation residual stress of a straight cylinder part in a powerful spinning process, which comprises the following specific steps of: firstly selecting a blank material meeting processing requirements, then carving spiral dents at different intervals on the inner wall of the blank material by combining a spinning thinning rate and a pass ratio, and finally forming the spiral dents on the inner wall of the blank material. The straightness deviation of the spinning straight cylinder part is controlled within 0.2 mm, the roundness deviation is controlled within 0.03 mm, and the subsequent machining efficiency is improved by more than 50%; the hardness value of a spinning forming workpiece is reduced by about 15%, high-quality spinning can be achieved, meanwhile, the residual stress in the spinning forming workpiece is reduced, and the use performance is improved.

Description

technical field [0001] The invention belongs to the technical field of spinning forming, and relates to a method for reducing the deformation residual stress of a straight cylindrical part during the powerful spinning process. Background technique [0002] Spinning is an advanced processing technology that combines the advantages of various processes such as extrusion, stretching, bending, ring rolling and rolling. It is widely used in the forming and manufacturing process of hollow rotary bodies. In the process of strong spinning, the deformation and thinning of metal materials are carried out at the same time; in the manufacturing process of important parts, the use of spinning forming can improve the integrity of structural components, reduce welds, and reduce the influence of welding stress. At the same time, powerful spinning can make the product have higher dimensional accuracy and surface finish, reducing the difficulty of subsequent surface processing. [0003] In t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D22/14B23P15/00B21D51/10
CPCB21D22/14B23P15/00B21D51/10Y02P10/20
Inventor 沈楚冯庆杨勃苗东李博张乐王思琦何秀玲贾波李耀辉
Owner XIAN TAIJIN INDAL ELECTROCHEM TECH
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