Precision control method of springback radius and springback angle for numerical control forming of bent pipe

A technology of precise control and rebound angle, applied in the field of mechanical processing, can solve the problems of consuming energy and material resources, without considering the rebound radius, etc., and achieve the effect of wide applicability, simple and reliable process method, and low process cost

Active Publication Date: 2012-07-25
JIANGSU NEW HENGJI SPECIAL EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the defects in the existing springback control technology that consume energy and material resources and do not conside

Method used

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  • Precision control method of springback radius and springback angle for numerical control forming of bent pipe
  • Precision control method of springback radius and springback angle for numerical control forming of bent pipe
  • Precision control method of springback radius and springback angle for numerical control forming of bent pipe

Examples

Experimental program
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Effect test

Example Embodiment

[0039] Example one

[0040] This embodiment is a precise control method for the springback radius and springback angle of CNC bending pipe forming.

[0041] The formed tube is a TA18 high-strength titanium tube with a diameter of 9.525mm and a wall thickness of 0.508mm. The forming radius is 28.575mm and the forming angle of the tube is 70°. The specific steps are as follows:

[0042] Step 1. Determine the rebound radius. Under stable forming conditions, LS-DYNA software is used for finite element modeling and simulation, and the rebound radius ΔR is obtained. The stated stable forming conditions are that there is no wrinkle inside the tube wall, and the maximum cross-sectional distortion rate and the maximum wall thickness reduction rate both meet the bending tube forming requirements. In this embodiment, the maximum cross-sectional distortion rate is required to be less than or equal to 5%, and the maximum The wall thickness reduction rate is required to be less than or equal to ...

Example Embodiment

[0066] Example two

[0067] This embodiment is a precise control method for the springback radius and springback angle of CNC bending pipe forming.

[0068] The formed tube is a TA18 high-strength titanium tube with a diameter of 9.525mm and a wall thickness of 0.508mm, with a bending radius of 28.575mm and a tube bending angle of 70°. The specific steps are as follows:

[0069] Step 1. Determine the rebound radius. Under stable forming conditions, ABAQUS software is used for finite element modeling and simulation, and the springback radius ΔR is obtained. The stated stable forming conditions are that there is no wrinkle inside the tube wall, and the maximum cross-sectional distortion rate and the maximum wall thickness reduction rate both meet the bending tube forming requirements. In this embodiment, the maximum cross-sectional distortion rate is required to be less than or equal to 5%, and the maximum cross-sectional distortion rate is less than or equal to 5%. The wall thicknes...

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Abstract

The invention relates to a precision control method of a springback radius and a springback angle for numerical control forming of bent pipe, which comprises the steps of compensating for the springback radius first; and then compensating for the springback angle at the forming radius after the forming radius meets the forming precision. Numerical control compensation of the springback radius of the bent pipe uses a corrected die method by reduction of the bending radius so that the forming radius after springback of the bent pipe meets the precision requirement. Numerical control compensation of the springback angle of the bent pipe uses an over-bending method by over-bending of the pipe across a certain angle so that the forming angle after springback of the bent pipe meets the precision requirement. The method provided by the invention meets the pipe bending precision required by aviation standards by means of compensating for the bending radius first and then compensating for the bending angle, and has the advantages of being simple and reliable in process method, high in efficiency and low in process cost. The method can be applied to numerical control bending forming of a high-strength titanium pipe, and solves the control problems of the remarkable springback angle and the remarkable springback radius of the high-strength titanium pipe, so as to obtain the titanium pipe that meets the high precision requirement of physical dimensions.

Description

technical field [0001] The invention relates to the field of mechanical processing, in particular to a precise control method for the springback radius and springback angle of digitally controlled bent pipe forming. Background technique [0002] Elbow parts are widely used in high-tech fields such as aviation and aerospace because they are easy to meet the requirements for light weight, high strength and low consumption of products. Used as metal structural parts. Numerical control pipe bending technology can not only realize the precise forming of pipe plastic bending, but also quickly form mass production capacity, and has the characteristics of high efficiency, energy saving, stable quality, and is easy to realize digitalization and high technology. Therefore, in high-tech industries such as aviation and aerospace In the field, pipe numerical control bending forming has developed into an advanced and applicable technology. [0003] The whole process of CNC pipe bending ...

Claims

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Application Information

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IPC IPC(8): B21D9/00
Inventor 杨合李恒宋飞飞
Owner JIANGSU NEW HENGJI SPECIAL EQUIP
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