Forming method for disk-shaped component and forming device for disk-shaped component

Patent metadata

Field	Value
Publication number	US-10300522-B2
Application number	US-201515553496-A
Country	US
Kind code	B2
Filing date	Oct 23, 2015
Priority date	Feb 26, 2015
Publication date	May 28, 2019
Grant date	May 28, 2019

Abstract

A forming method for a disk-shaped component includes: mounting a heated material on a table; applying a load to the material with a forming roll while rotating the table; forming the material into a disk shape using roll forging; and suppressing decrease in temperature of the material during forming using a heat retaining device.

First claim

The invention claimed is:

1. A forming method for an impeller disk, the method comprising:
mounting a material heated beforehand on a table;
applying a load to an upper surface of the material with a forming roll while rotating the table around a central axis extending in a vertical direction of the table;
forming the material into a disk shape using roll forging; and
suppressing decrease in temperature of the material during forming using a heat retaining device, wherein
the heat retaining device is a burner, and
the material is formed while the material is heated by a flame emitted from the burner towards an inner circumferential side of the upper surface, an outer circumferential side of the upper surface, and a side surface forming an outer circumference of the material rotating on the table.

2. The forming method according to claim 1 , wherein
the heat retaining device is at least one of a heat insulating material and a radiation material, and
the material is formed by disposing at least one of the heat insulating material and the radiation material on the outer side of the material rotating on the table.

3. The forming method according to claim 1 , wherein
the heat retaining device is disposed in a range of 20° to 180° in a circumferential direction about a rotational axis of the material, and
the rotating material is heated or insulated by the heat retaining device in the range of 20° to 180° in the circumferential direction to suppress decrease in temperature of the material.

4. A forming device for an impeller disk, wherein the forming device mounts a material heated beforehand on a table, applies a load to an upper surface of the material with a forming roll while rotating the material by rotating the table around a central axis extending in a vertical direction of the table, and forms the material into a disk shape using roll forging, the forming device comprising:
a heat retaining device that suppresses decrease in temperature of the material during forming, wherein
the heat retaining device is a burner, and
the material is formed while the material is heated by a flame emitted from the burner towards an inner circumferential side of the upper surface, an outer circumferential side of the upper surface, and a side surface forming an outer circumference of the material rotating on the table.

Assignees

• Mitsubishi Heavy Ind Compressor Corp

Inventors

• Watanabe Yujiro
• Yagi Nobuyori
• Kawasaki Atsushi
• Ishii Ken
• Yokoo Kazutoshi

Classifications

• B21J1/06

  Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations {(B21J5/063 takes precedence)} · CPC title

• B21H1/02 Primary

  discs; disc wheels · CPC title

• B21D22/16

  over shaping mandrels or formers · CPC title