Effects of Vibration on the Blank Holder in Cup Drawing
In this investigation, effects of a vibration on the blank holder in cup drawing were studied. The vibration on the blank holder was given by the cam mechanism, and the blank holder frequencies were varied from 10 Hz to 45 Hz. An aluminum sheet was used as the test material.
Experimental results were as follows: a limiting drawing ratio (L.D.R.) increased with increase of the frequency, that is, the L.D.R. with the conventional method was 2.00, whereas such ratios at frequencies 11.7, 21.5, 29.2, and 45.0 Hz were 2.175, 2.325, 2.375, and 2.425 respectively, further a punch load and a thickness strain in the drawing cup decreased with increase of the frequency.
Unable to display preview. Download preview PDF.
- 1.T. Machida and T. Nakagawa (1975) Deep drawing of Locally Heated Steel Sheets, J.Japan Soc. Tech. Plasticity vol.16 no. 171 p.291.Google Scholar
- 2.K. Kato and Y. Uchida (1966) on the Effect of Lubrication in Deep Drawing and Stretch Forming, J. Japan Soc. Tech. Plasticity vol.7, no.70. p.576.Google Scholar
- 3.K. Hanaki, A. Nakagawa, M. Matsumura, and K. Kato (1976) Relationships among L.D.R., Fracture Load and Maximum Drawing Load, J.Japan Soc. Tech. Plasticity vol.17 no.180 p.45.Google Scholar
- 4.O. Svahn (1954) Deep-Drawing Properties of Sheet Steel Fundamental Principles and Test Methods, J. the Iron and Steel Ins. May. 1954 p.129.Google Scholar
- 5.J.C. Wright (1962) Relationship between Mechanical Properties Deep-Drawability and Stretch-Formability, Sheet Metal Industries. Google Scholar
- 6.Senior, B.W.(1956) Flange Wrinkling in Deep-Drawing Operation, J.Mech. Phs. Solids, 1956–4, p. 235Google Scholar
- 7.J.M. Alexander and J.C. Warwick (1962) Prediction of the Limiting Drawing Ratio from the Stress Strain Curve, J. of the Institute of Metals.Google Scholar