Vol. 1, No. 8, 2006

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Effect of tip profile on cutting processability of a trapezoidal cutting blade indented to an aluminum sheet

Seksan Chaijit, Shigeru Nagasawa, Yasushi Fukuzawa, Mitsuhiro Murayama and Isamu Katayama

Vol. 1 (2006), No. 8, 1301–1321

This paper is an investigation of detaching phenomena of a trapezoidal cutting blade on a wedged surface of a thin work sheet. To study critical conditions for cutting off an aluminum sheet, the wedged profile of the work sheet was experimentally studied by varying the tip thickness of the trapezoidal cutting blade, which simulated a crushed bevel blade. To analyze the detached condition and separation force of the wedged sheet, an elastoplastic finite element program was used to analyze wedge indentation to the work sheet. The following results were obtained: (i) the deformation of the wedged sheet can be classified in four patterns; (ii) the critical condition for cutting off the work sheet depends on the ratio of tip thickness by sheet thickness wt; (iii) the separation of the work sheet occurred statistically for wt = 0.13 0.28; and (iv) the separation line force can be used to explain the necking mode and the detached condition.

shear cutting, detaching, elastoplastic FEM, separation force, wedge indentation, upsetting
Received: 12 January 2006
Revised: 13 June 2006
Accepted: 27 July 2006
Published: 1 December 2006
Seksan Chaijit
Graduate School of Information Science and Control Engineering
Nagaoka University of Technology
Nagaoka, Niigata
940-2188 Japan
Shigeru Nagasawa
Department of Mechanical Engineering
Nagaoka University of Technology
Nagaoka, Niigata
940-2188 Japan
Yasushi Fukuzawa
Department of Mechanical Engineering
Nagaoka University of Technology
Nagaoka, Niigata
940-2188 Japan
Mitsuhiro Murayama
Faculty of Business Administration
Nagaoka University
Nagaoka, Niigata
940-0828 Japan
Isamu Katayama
Katayama Steel Rule Die Co., Ltd.
162-0381 Japan