Comparative Study on Experiment and Simulation of Fine-Blanking with Negative Clearance for AISI-410 and QCr0.5
Through the comparative analysis on the blanking force and cross section microstructure of AISI-410 and QCr0.5, the correlative prediction is obtained from the simulation and the experiment. The different changing principles of fine-blanking with negative clearance on two materials are gained. According to summarizing the experimental data, the local flow conditions, the changing principle of metallographices and microstructures in some areas, such as, rollover zone, shear zone, fracture band, burrs zone, are obtained. This paper further analyzes the work hardening of cross section in blanking work piece, and studies the influence on hardness, the quality of work piece and blanking force. The results show that in the force rising stage of fine blanking with negative clearance on AISI-410, the rising rate of work hardening caused by the squeezing and shearing of the die was lowered; in the force rising stage of fine blanking with negative clearance on bronze, the rising rate was elevated. The negative clearance of fine-blanking causes extrusion forming, which effectively inhibits the tensile, the tear. Therefore, the material can be easily punched. However, compared with materials, such as, QCr0.5, materials like AISI-410, are earlier broken along the punch direction.
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Document Type: Research Article
Publication date: September 1, 2012
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