Effect of cutter tip angle on cutting characteristics of acrylic worksheet subjected to punch/die shearing

Masami Kojima; Pusit Mitsomwang; Shigeru Nagasawa; Masami Kojima; Pusit Mitsomwang; Shigeru Nagasawa

doi:10.3934/matersci.2016.4.1728

AIMS Materials Science

2016, Volume 3, Issue 4: 1728-1747. doi: 10.3934/matersci.2016.4.1728

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Research article Special Issues

Effect of cutter tip angle on cutting characteristics of acrylic worksheet subjected to punch/die shearing

Department of Mechanical Engineering, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, Niigata 940-2188, Japan

Received: 28 September 2016 Accepted: 28 November 2016 Published: 05 December 2016

This paper aims to describe the effect of tool geometry on cutting characteristics of a 1.0 mm thickness acrylic worksheet subjected to a punch/die shearing. A set of side-wedge punch and side-wedge die which had the edge angle of 30°, 60° and/or 90° was prepared and used for cutting off the worksheet. A load cell and a CCD camera were installed in the cutting system to investigate the cutting load resistance and the side-view deformation of the worksheet. From experimental results, it was revealed that a cracking pattern at a sheared zone was remarkably affected by the edge angle of cutting tool. A cracking direction was almost coincident to the edge angle when considering the punch/die edge angle of 30°, while any matching of them was not observed in case of the punch/die edge angle of 60°, 90°. By using the 30° side-wedge tool, a flat-smooth sheared surface was generated. When combing the punch edge angle of 90° and the die edge angle of 60°, the cracking profile was characterized by the both edge angles for each part (die and punch). Carrying out an elasto-plastic finite element method analysis of cutter indentation with a few of symmetric and asymmetric punch/die edges, the stress distribution and deformation flow at the sheared zone were discussed with the initiation of surface cracks
- acrylic,
- brittle,
- fragile,
- shear cutting,
- punch/die tool,
- crack,
- FEM
Citation: Masami Kojima, Pusit Mitsomwang, Shigeru Nagasawa. Effect of cutter tip angle on cutting characteristics of acrylic worksheet subjected to punch/die shearing[J]. AIMS Materials Science, 2016, 3(4): 1728-1747. doi: 10.3934/matersci.2016.4.1728

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Abstract

This paper aims to describe the effect of tool geometry on cutting characteristics of a 1.0 mm thickness acrylic worksheet subjected to a punch/die shearing. A set of side-wedge punch and side-wedge die which had the edge angle of 30°, 60° and/or 90° was prepared and used for cutting off the worksheet. A load cell and a CCD camera were installed in the cutting system to investigate the cutting load resistance and the side-view deformation of the worksheet. From experimental results, it was revealed that a cracking pattern at a sheared zone was remarkably affected by the edge angle of cutting tool. A cracking direction was almost coincident to the edge angle when considering the punch/die edge angle of 30°, while any matching of them was not observed in case of the punch/die edge angle of 60°, 90°. By using the 30° side-wedge tool, a flat-smooth sheared surface was generated. When combing the punch edge angle of 90° and the die edge angle of 60°, the cracking profile was characterized by the both edge angles for each part (die and punch). Carrying out an elasto-plastic finite element method analysis of cutter indentation with a few of symmetric and asymmetric punch/die edges, the stress distribution and deformation flow at the sheared zone were discussed with the initiation of surface cracks

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