Comparative Study of the Process Fracture between Fine-Blanking with Negative Clearance and Conventional Blanking

Abstract:

The different separation mechanism of fine-blanking with negative clearance and conventional blanking under different blanking process are analyzed through fine-blanking with negative clearance and conventional blanking processing experiments on AISI-1045 steel. The fractography photographs in the different deformation regions, such as rollover zone, shearing band, fracture zone and burr zone are scanned by scanning electron microscope (SEM-JSM-6360LV). The place of fracture of fine-blanking with negative clearance has emerged into the middle of work piece not the undermost of workpiece, and the width of fracture band is as tiny as 50-100 micron. The smooth surface formed by the uniform plastic flow in the process fine-blanking with negative clearance, and the full course of finally toughness fracture have been analyzed in the final phase of ejecting in fine-blanking with negative clearance. From the perspective of material meso-damage, the fracture mechanism of special blanking process with negative clearance has been illustrated in details.

• Periodical: Advanced Materials Research (Volumes 97-101)
• Pages: 191-194
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.97-101.191
• Online since: March 2010
• Authors: Hong Du, Wei Fu Fan, Zhong Mei Zhang
• Keywords: Blanking, Microcrack, Negative Clearance, Toughness Fracture

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