Title:
CRANKSHAFT PRODUCTION METHOD AND CRANKSHAFT PRODUCTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2012/035663
Kind Code:
A1
Abstract:
[Problem] To provide a method and device having a simple configuration and being capable of producing crankshafts easily and with precision. [Solution] The present method is for producing a crankshaft (100) comprising a journal part (J), which serves as the central axis for rotation, a pin part (P), which is eccentric relative to the journal part, and a web part (W), which extends between the journal part (J) and the pin part (P). The method comprises: a preliminary shaping step for forming a blank (10) by bending a stock material (1) so as to form parts (p, w) that will become the pin part and the web part; and a final shaping step in which pressure is applied to the blank (10) in the axial direction so that the part (w) that becomes the web part comes to have a prescribed thickness, and the web section (W) is shaped so as to have a prescribed pitch. In the preliminary shaping step, a slender section (T) is formed in the part (w) of the blank (10) which later becomes the web part.
Inventors:
MAEDA OSAMU (JP)
Application Number:
PCT/JP2010/066243
Publication Date:
March 22, 2012
Filing Date:
September 17, 2010
Export Citation:
Assignee:
TOYOTA MOTOR CO LTD (JP)
MAEDA OSAMU (JP)
MAEDA OSAMU (JP)
International Classes:
B21K1/08; F16C3/08; F16C3/14
Foreign References:
| JPH0518662B2 | 1993-03-12 | |||
| JPS58125330A | 1983-07-26 | |||
| JPS6120643A | 1986-01-29 |
Attorney, Agent or Firm:
HANABUSA, Tsuneo et al. (JP)
Sepal Tsuneo (JP)
Sepal Tsuneo (JP)
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Claims: