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Journal of Applied Sciences ›› 1990, Vol. 8 ›› Issue (3): 223-231.

• Articles • Previous Articles     Next Articles

PLASTICITY OF PERFECT FULL CROSS SHEAR COLD ROLLING AND O. HOFFMAN'S FORMULA

ZHIAO ZHENGCHEG1, SONG MEIJUN2, WANG MUQI2   

  1. 1. Hunan Economy and Construction Promoting Committee;
    2. Changsha Communications Institute
  • Received:1987-04-17 Revised:1988-07-05 Online:1990-09-30 Published:1990-09-30

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Abstract: New formulas for calculating the pressure per unit surface, mean pressure per unit surface and total compression load for perfect cross shear cold rolling are proposed:
px=2K-qh+(qh-qH)(lnhx/h)/(lnH/h)
px=2K-qH+(qh-qH)(lnhx/h)/(lnH/h)
The new formulas, compared with O. Hoffman's formula, have higher accuracy. Based on these new formulas, a new theory of friction-free hill in crass shear cold rolling is proposed.