Title:
METHOD FOR FORGING BEARING LACE AND APPARATUS FOR SEPARATING BEARING LACE
Document Type and Number:
Japanese Patent JP3514746
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a forged bearing lace having neither uneven thickness nor decarburized layer.
SOLUTION: A flat preformed body A3 after being upset is mounted on a flat forming recess 21 so as to have face-to-face contact with the bottom surface of the forming recess 21. Then, a punch 23 is lowered and moved into the flat forming recess 21, while the peripheral surface of a reference-end side 23d is in sliding contact with the side face of the flat forming recess 21, except an annular protrusion 23a at the tip of the punch 23. Then, the flat preformed body A3 is plastically deformed by the annular protrusion 23a and a circular protrusion 23c at its inner diameter side. The part thus deformed is fed into the first annular recess 23b at the tip of the punch 23 and the second annular recess 23e at its outer diameter side. Consequently, an integrally formed body is forged so that outer and inner laces are integrated. Thereafter, the inner part of the inner lace is blanked from the formed body in which the inner and outer laces are integrated. Finally, the integrally formed body is divided into the outer and inner laces.
Inventors:
Nishida, Kokichi
Nobo, Tokuho
Nobo, Tokuho
Application Number:
JP2001284852A
Publication Date:
March 31, 2004
Filing Date:
September 19, 2001
Export Citation:
Assignee:
SAMTEC KK
International Classes:
F16C33/64; B21J5/02; B21J5/06; B21J13/02; B21K1/04; (IPC1-7): B21K1/04; B21J5/02; B21J5/06; B21J13/02; F16C33/64
Attorney, Agent or Firm:
前田 弘 （外７名）
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