• Title/Summary/Keyword: bonderizing

Search Result 2, Processing Time 0.016 seconds

A Study on the Manufacturing of Die and Improvement of Process in Fiorging Work of Alternator Rotor Pole (앨터네이터 로터폴의 단조가공에서 공전개선과 금형제작에 관한 연구)

  • 김세환
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
    • /
    • 1997.04a
    • /
    • pp.54-61
    • /
    • 1997
  • Furthermore the rothor pole, with a solid type, manufactured by cold forging process at present should dmploy 3 press lines which consist of total 7 processes. Since A.S.B. treatment is prerequisite for the press line, the 3 times of A.S.B. treatment requires a long lead time, with little contribution to the reduction in cost. The author has investigated, through this researach, the possibility of a new forging method for a rotor pole production with (1) 2 pass instead of 3 press lines (2) only one A.S.B. treatment instead of 3 ones (3) solid type instead of sectional type, and (4) improvment of material property during process using a modified forging process and a specially designed die.

  • PDF

A Study on the Development of Cold Forging Dies for Stainless Steel Sheet (SUS420) (스테인리스 강판(SUS420)의 냉간단조용 금형개발에 관한 연구)

  • 김엽래;김세환;유헌일
    • Transactions of the Korean Society of Mechanical Engineers
    • /
    • v.19 no.3
    • /
    • pp.877-885
    • /
    • 1995
  • Cold forging die for metal scissor is made by electric discharge machine. The impression of female die is made by electric discharge machine, the heat treatment is applied, and the impression is polished. When we forge goods by using this kind of die, the abrasion is severe and the crack occurs after forging about 240 strokes. Because the die should be frequently produced in the case, the cost rises, the work is delayed, and the precesion of goods is not good. Therefore, the electric discharge machine was not used in this study. Main die was produced by making hob, installing the hob to cold hobbing press, indenting the die material, and cold hobbing the impression. The die life was increased to 5,000-6,000 strokes in this case. In the future study, the die life will be increased to 10,000 strokes by changing the following : (1) the pre-treatment of slug, (2) the structure of die block, (3) the heat treatment of die material