The Bending minimization of Joint Shat in Cross rolling

  • Park Joon Soo (Forging Dept. Bongshin Co.) ;
  • Lim Seong Joo (Digital Production Processing Team, Manufacturing process Research Center, Korea Institute of Industrial Technology) ;
  • Yoon Duk Jae (Digital Production Processing Team, Manufacturing process Research Center, Korea Institute of Industrial Technology) ;
  • Choi Seogou (Digital Production Processing Team, Manufacturing process Research Center, Korea Institute of Industrial Technology)
  • Published : 2003.10.01

Abstract

Although cross rolling process has many advantages in forging a joint shaft, an automotive component of front axle unit, subsequent process is necessary to straighten its bending during forging process. In this paper the bending minimization of the joint shaft was studied to eliminate such an additional process. First of all, a characteristic diagram was used to find out factors affecting the bending of the shaft. Also design of experiments was utilized for estimating the influence of those factors. It was found that the phase angle, which is the difference in starting positions between upper and lower dies, was important to minimize the bending of joint shaft and die cooling is necessary to diminish the distribution of bending.

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