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Spinning forming method and spinning forming apparatus

  • US 10,549,468 B2
  • Filed: 08/30/2013
  • Issued: 02/04/2020
  • Est. Priority Date: 09/03/2012
  • Status: Active Grant
First Claim
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1. A spinning forming method comprising:

  • a first forming step of forming a first level-changing portion at a position between flat portions of a plate by, while rotating the plate fixed to a main shaft, causing a processing tool to contact a first main surface of the plate, the first level-changing portion extending from the first main surface toward a second main surface opposite to the first main surface, the flat portions being flat in a radial direction of the main shaft; and

    a second forming step of forming a second level-changing portion by, while rotating the plate fixed to the main shaft, causing the processing tool to contact the second main surface of the plate at an outer peripheral side of the first level-changing portion, the second level-changing portion extending in an opposite direction to the first level-changing portion, wherein;

    in the first forming step, a heater provided at an opposite side of the plate relative to the processing tool locally heats a position of the second main surface of the plate by induction heating,in the second forming step, the heater provided at the opposite side of the plate relative to the processing tool locally heats a position of the first main surface of the plate by induction heating,the first level-changing portion is fully formed at a position on the plate such that the first level-changing portion is not in contact with a first receiving jig, which is attached to the main shaft and on which the plate is placed before the first forming step, andthe second level-changing portion is fully formed at a position on the plate such that the second level-changing portion is not in contact with a second receiving jig that replaces the first receiving jig after the first forming step and before the second forming step.

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