Method of manufacturing mold

Patent metadata

Field	Value
Publication number	US-11072038-B2
Application number	US-201916255866-A
Country	US
Kind code	B2
Filing date	Jan 24, 2019
Priority date	Mar 2, 2018
Publication date	Jul 27, 2021
Grant date	Jul 27, 2021

Abstract

A method of manufacturing a mold includes the processes of: arranging a channel member in a recessed groove formed on a surface of a mold body; irradiating an opening part of the recessed groove with a first laser, thereby performing a first build-up welding on a part in the vicinity of the opening part of the recessed groove; and irradiating a region on a surface of the mold body including a region where the first build-up welding has been performed with a second laser, thereby performing a second build-up welding on a region on the surface of the mold body including the region where the first build-up welding has been performed.

First claim

What is claimed is:

1. A method of manufacturing a mold including a cooling passage inside therein, the method comprising the processes of:
arranging a channel member, which serves as a wall part of the cooling passage, in a recessed groove formed on a surface of a mold body;
irradiating an opening part of the recessed groove with a first laser at a first output and a first energy density, the first laser being set in such a way that the channel member is prevented from being damaged, thereby performing a first build-up welding on a part in the vicinity of the opening part of the recessed groove; and
irradiating a region on a surface of the mold body including a region where the first build-up welding has been performed with a second laser at a second output that is higher than the first output and a second energy density that is lower than the first energy density, the second laser being set in such a way that a build-up speed becomes higher than in a case in which the first laser is applied, thereby performing a second build-up welding on a region on the surface of the mold body including the region where the first build-up welding has been performed.

2. The method of manufacturing the mold according to claim 1 , wherein
the first laser is a pulsed laser, and
the second laser is a continuous wave laser.

3. The method of manufacturing the mold according to claim 1 , comprising processing, after the process of performing the first build-up welding but before the second build-up welding is performed, a region on which at least the first build-up welding has been performed in a planar shape, thereby making the region in which the first build-up welding has been performed flush with the surface of the mold body.

4. The method of manufacturing the mold according to claim 1 , wherein the material of the first build-up welding is different from the material of the second build-up welding.

Assignees

• Toyota Motor Co Ltd

Inventors

• Yamazaki Tomoya

Classifications

• B23K26/342 Primary

  Build-up welding · CPC title

• B22D11/124

  for cooling · CPC title

• B23K37/003

  Cooling means for welding or cutting · CPC title

• B23K26/364

  for making a groove or trench, e.g. for scribing a break initiation groove · CPC title

• B23P23/00

  Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass (if the particular kinds of operation are not essential B23Q37/00 - B23Q41/00; {working by laser beam combined with other working of metal B23K26/0093}) · CPC title