Abstract
The mechanism of three-point thick plate bending finished via the specially designed experiment device in this paper. The deformation process discretization analysis completed via gridding method. T2 copper thick plate was chosen as the subject for the experiment, and the ratio of punch radius to sheet thickness was R/t = 1 and 2. The surface of the specimen was meshed by use of fine ink pen. The forming process was accomplished on the experimental facility of three-point free of sheet metal bending. And photos of the specimen in the forming process were recorded on every moment by use of digital camera. The grid pictures of specimen were gotten by image processing, and the accuracy is comparable with finite element analysis. Compared with the grid pictures, the inside and outside of the thick plate bending angle wasn’t strict equaled in the forming process, and there was a trend that the angle would increase gradually from inside to outside. The angle difference would be decreased under the effect of the correction force after spring-back.
Highlights
Spring-back will be the first word comes to mind at the mere mention of bending
This paper mainly studied the non-ferrous metal T2 copper plate material forming mechanism analysis and its quality influence
There was a trend that the angle would increase gradually from inside to outside
Summary
Spring-back will be the first word comes to mind at the mere mention of bending. As a basic problem in bending, spring-back affects the dimensional accuracy of sheet metal parts during unloading. Regarding the fundamental importance of the deformation process of the bending, numerous experimental and theoretical investigations have been carried out to calculate its spring-back Both simulation and measurement of spring-back are investigated in these two papers respectively, and taking automotive materials as their study subject, such as DQSK steel, 6022-T4, HSLA steel, etc. Experimental spring-back shapes were investigated using a 3D measuring machine in their paper They found that the spring-back of a formed bumper increased with an increase in yield stress (YS) of the material, coinciding with the results of 2-D FEM Simulation. Many research results and achievements have been found for summarizing various empirical formulas to predict the stress and strain changes of material plastic forming, the bending complex process could be simulation by FEM [9]. It is necessary for the plastic performance good non-ferrous metal forming an in-depth research
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