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Rapid die compensation method considering rebound of bent part

A compensation method and edge bending technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of uneven distribution of springback on curved edges and reaching the springback angle.

Active Publication Date: 2014-02-26
SHENYANG AIRCRAFT CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The limitation of this method is that due to the uneven distribution of the springback of the curved edge, the correct compensation angle needs to be obtained through "trial and error"; in the digital design of the current tooling mold, the springback cannot be achieved by simply rotating the reference surface angle correction

Method used

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  • Rapid die compensation method considering rebound of bent part
  • Rapid die compensation method considering rebound of bent part
  • Rapid die compensation method considering rebound of bent part

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0086] 1. Fit springback distribution function parameters and calculate springback angle

[0087] Firstly, the basic bending test is carried out to obtain a series of bending edge springback angle data. The basic flanging test is a series of straight flanging dies (such as Figure 1a , Figure 1b ), curved edge molds with different curvature radii (such as Figure 2a ) and sheets with different arc lengths (such as Figure 2b ) forming test.

[0088] Follow the steps below image 3 As shown in the process, the parameters of the rebound distribution function are fitted.

[0089] First, extract the springback angle θ of the outer and central sides of the curved edge from the springback angle data e and θ o , springback angle θ of straight flange s , Calculate the values ​​of g and λ from the rebound angle. Secondly, from the geometric parameters l and L of the curved edge corresponding to the test 0 , R (such as Figure 4 shown), transform to get X 1 、X 2 、X 3 . Fi...

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Abstract

The invention relates to a rapid die compensation method considering rebound of a bent part. The method comprises the contents of firstly establishing a rebound distribution function comprising putting forward a function prototype and fitting function parameters, and secondly putting forward a rapid rebound compensation method. The method is not used for numerical simulation, is directly used for predicting the spring back angle of the bent part according to the rebound distribution function and then converting the adjustment amount of a die surface according to the spring back angle, so as to perform rapid compensation on the die surface, and improves the efficiency of die design.

Description

technical field [0001] The invention relates to a rapid mold compensation method for a bent edge part considering springback, and belongs to the field of material processing engineering. Background technique [0002] Rubber forming process is one of the main methods of aviation sheet metal forming, and springback is the main defect affecting the manufacturing precision of its products. With the springback compensation method based on numerical simulation, the die surface compensation of the rubber forming process can be preliminarily realized. However, this method must use numerical simulation to predict the springback, which requires a long calculation time for each part. In the rubber forming process with thousands of parts, this method is not suitable for practical application. If a fast and accurate springback compensation method can be found without numerical simulation steps, it will be a great impetus to the improvement of the quality and production efficiency of rub...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 李小强张鑫段云云
Owner SHENYANG AIRCRAFT CORP
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