Burr-Free Microblanking Using Piezoelectric Actuator

[+] Author and Article Information
Isamu Aoki, Masahiro Sasada

Department of Mechanical Engineering, Kanagawa University, Rokkakubashi 3-27-1 Kanagawa-ku, Yokohama, 221-8686, Japan

J. Manuf. Sci. Eng 126(4), 653-658 (Feb 04, 2005) (6 pages) doi:10.1115/1.1812775 History: Received December 01, 2003; Revised September 01, 2004; Online February 04, 2005
Copyright © 2004 by ASME
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Maeda,  T., 1954, “Reciprocating Blanking Method,” Science of Machine,10(1), pp. 140–144.
Liebing,  H., and Lange,  K., 1977, “Blanking and Piercing Without Any Burr F,” CIRP Ann., 27, p. 177.
Maeda,  T., and Aoki,  I., 1980, “The Development of Burr-Free Blanking: Roll Blanking,” J. Fac. Eng., Univ. Tokyo, 25(4), pp. 754–767.
Makino,  I., 1975, “Push Back Blanking Method,” Press Working,13(5), pp. 93–98.
Aoki,  I., and Maeda,  T., 1991, “Experimental Study on Process Mechanism of Burr-Free Blanking,” J. Jpn. Soc. Technol. Plast., 32(5), pp. 621–626.
Oertenblad,  B., and Apppel.,  B., 1976, “New Method for Cutting Hardened Carbon Steel,” CIRP Ann., 25, pp. 159–163.
Aoki,  I., Sasada,  M., Higuchi,  T., and Yano,  T., 2002, “Development of Micro-Piercing System With Punch-Damage Monitoring Function,” J. Mater. Process. Technol., 125(126), pp. 497–502.


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Conventional blanking method
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Typical surface of blanked products
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Processes of pushback blanking method. (a) Reciprocating blanking method 1. (b) Counter blanking method 2. (c) Pushback blanking method 4.
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Mechanism of burr-free blanking 5. (a) Half blanking. (b) Pushback. (c) Blanking of residual thickness.
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Typical profile and appearance of burr-free blanked product
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Die set used for verifying success range of burr-free blanking
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Successful range in burr-free blanking for foil (aluminum foil, A1100P): (a) T=200 μm; (b) T=100 μm; (c) T=50 μm.
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Magnifying mechanism II
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Calculation method of displacement piezoelectric element by conversion to thermal expansion
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FEM model of magnifying mechanism: (a) type I; (b) type II.
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Comparison of results of experimental and FEM: (a) generated force; (b) generated displacement.
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Experimental setup for burr-free blanking of foil and element used
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Shearing diagram of step 1 of burr-free blanking of aluminum foil (50 μm thickness)
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Example of blanked product: (a) conventionally blanked product (with burr); (b) burr-free blanked product.
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Die set usable for progressive burr-free blanking



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