Method for testing bending property parameter of S-shaped test piece material

Abstract

The invention discloses a method for testing the bending property parameter of an S-shaped test piece material. The method comprises the following steps: determining a structural size; dividing the S-shaped test piece material into a starting straight line segment, a starting bent segment, an intermediate straight segment, an end bent segment and an end straight segment; bending the starting bentsegment and the end bent segment in different directions; measuring the length of every straight line segment and the bending angle and the bending radius of every bent segment; calculating an actualdeveloped length TL0; performing secondary bending on the starting bent segment and the end bent segment, and carrying out reverse secondary bending on the end bent segment; measuring the length MLS of the starting straight segment, the length MLM of the intermediate straight segment, the length MLE of the end straight segment, the radius MRS of the starting bent segment, the radius of the end bent segment MRE, the bending angle MAS of the starting bent segment and the bending angle MAE of the end bent segment after the secondary bending; calculating a secondary actual developed length ML0 ofthe test piece; and calculating the bending property parameter. The material in every batch does not need to be tested and simulated, so the cost is greatly reduced, and the period is shortened.

Description

technical field [0001] The invention relates to the field of plastic processing of materials, in particular to a method for testing bending performance parameters of S-shaped specimen materials. Background technique [0002] In the field of material plastic processing, whether it is sheet, profile, pipe, or bar, bending is the most common processing method. Due to the particularity of plastic forming, the main characteristics of materials after bending are material elongation and material rebound after bending. With the gradual improvement of product processing precision in modern industry, controlling the bending elongation and bending springback angle has become a necessary link to determine the bending process parameters. Therefore, testing and mastering material bending performance parameters has become the focus of technical personnel. [0003] In general, the elongation ΔL conforms to the formula ΔL=λ×π×R×A / 180, where λ is the bending elongation, R is the bending rad...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for testing the bending performance parameters of S-shaped specimen materials, which is used to solve the problem in the prior art that each batch of materials needs to be tested and simulated, resulting in high cost and long period