Proceedings of the Korean Society for Technology of Plasticity Conference (한국소성가공학회:학술대회논문집)
- 2001.10a
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- Pages.170-173
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- 2001
Design of Cold Extrusion Dies using Flexible Tolerance Method
플렉시블 허용오차법에 의한 냉간압출 금형설계
Abstract
The design for cold extrusion dies is very important because the die insert is subjected to very high radial and hoop stresses. The design of cold extrusion dies has many constrained conditions. In this paper, two assumptions were proposed. First assumption was selected by yielding strength dependent on the to hoop stress of each ring in dies. Second assumption is that the maximum inner pressure is determined when yielding occurs in one ring of dies. To obtain the maximum inner pressure the flexible tolerance method was applied. A comparison of design values between the proposed method and the conventional method has been discussed.
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