引抜用指数関数ダイスについて

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  • On the Wire Drawing Exponential Die
  • ヒキヌキヨウ シスウ カンスウ ダイス ニ ツイテ

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Regarding the inner profile of wire drawing die, besides conical die those which have circular, hyperbolic or elliptic surface of revolution were studied. But die which has exponential surface of revolution has not been discussed. In multistage plastic working the ratios of cross sectional areas of work are changed in general in according to geometrical progression. Therefore, in continious plastic working it may be reasonable that they are changed exponentially. Exponential die is an application of this idea. In this report, from the theoritical formula of the drawing stress in this die, a practical stress formula for calculation is related and stress calculation is made. Then it has been revealed that, when compared with the stress in the conical die, both have little difference for some die angles.

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