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Title:
METHOD OF MANUFACTURING PISTON PLATE
Document Type and Number:
Japanese Patent JP2018001200
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To manufacture a piston plate with fewer steps.SOLUTION: A method of manufacturing a piston plate 6 includes the following steps (a) and (b). In the step (a), a plate 6 having a first opening portion at a center is prepared. In the step (b), a first die 71 and punch 73 perform burring machining on the plate 6 to form a boss portion 61 extending in an axial direction. The first die 71 has a second opening portion 71a with a diameter larger than the first opening portion. The punch 73 has a diameter which is larger than the first opening portion and smaller than the second opening portion 71a. In the (b) step, a clearance d between an inner peripheral surface of the first die 71 and an outer peripheral surface of the punch 73 is made to be smaller than the thickness t of the plate 6.SELECTED DRAWING: Figure 5

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Inventors:
KAMIYA SHIGEO
Application Number:
JP2016129576A
Publication Date:
January 11, 2018
Filing Date:
June 30, 2016
Export Citation:
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Assignee:
EXEDY CORP
International Classes:
B21D19/08; B21J5/06; F16H45/02
Attorney, Agent or Firm:
Shinki Global IP Patent Corporation