Spinning forming apparatus and forming method

A spinning forming method of shaping a plate while rotating the plate around a rotational axis, the method comprising:

• contacting a first main surface of the plate with a processing tool to process and shape the plate in a state where the plate is attached to a receiving jig of a holding member, and the plate is rotated around the rotational axis;
• arranging a heater at the opposite side of the processing tool across the plate;
• and
• locally heating a position of a second main surface of the plate opposite to the first main surface, the position being located on a circumference around the rotational axis, the circumference being defined by a position, with which the processing tool contacts, of the plate,
• wherein, when the plate is being processed and shaped by the processing tool, a space is present on a part of the second main surface, the part being opposite to the position of the first main surface that is being contacted by the processing tool.

A spinning forming method of shaping a plate while rotating the plate around the rotational axis, the method comprising:

• contacting a first main surface of the plate with a processing tool to process and shape the plate in a state where the plate is attached to a receiving jig of a holding member, and the plate is rotated around the rotational axis;
• arranging a heater at the opposite side of the processing tool across the plate;
• locally heating a position of a second main surface of the plate opposite to the first main surface, the position being located on a circumference around the rotational axis, the circumference being defined by a position, with which the processing tool contacts, of the plate;
• measuring a surface temperature of a position of the plate, the position being located on the circumference around the rotational axis, the circumference being defined by the position with which the processing tool contacts;
• and
• adjusting an output of the heater, performing the local heating, such that the surface temperature falls within a predetermined temperature range.

A spinning forming method of shaping a plate while rotating the plate around a rotational axis, the method comprising:

• contacting a first main surface of the plate with a processing tool to process and shape the plate in a state where the plate is attached to a receiving jig of a holding member, and the plate is rotated around the rotational axis;
• arranging a heater at the opposite side of the processing tool across the plate;
• and
• heating, by high frequency induction heating, a position of a second main surface of the plate opposite to the first main surface, the position being located on a circumference around the rotational axis, the circumference being defined by a position, with which the processing tool contacts, of the plate,
• wherein the high frequency induction heating is performed at the same time as the processing tool process and shapes the plate.