Abstract: Provided is a method for manufacturing a sintered component, which can suppress occurrence of edge chipping when a through-hole is formed in a powder-compact green body and also has a good productivity. The method for manufacturing a sintered component includes a molding step of press-molding a raw material powder containing a metal powder and thus fabricating a powder-compact green body; a drilling step of forming a hole in the powder-compact green body using a drill; a sintering step of sintering the powder-compact green body after drilling, wherein the drill used for drilling has a circular-arc shaped cutting edge on a point portion thereof.
Type:
Grant
Filed:
December 8, 2015
Date of Patent:
May 10, 2022
Assignees:
Sumitomo Electric Sintered Alloy, Ltd., Nikken Tool Co., Ltd.
Abstract: Provided is a method for manufacturing a sintered component, which can suppress occurrence of edge chipping when a through-hole is formed in a powder-compact green body and also has a good productivity. The method for manufacturing a sintered component includes a molding step of press-molding a raw material powder containing a metal powder and thus fabricating a powder-compact green body; a drilling step of forming a hole in the powder-compact green body using a drill; a sintering step of sintering the powder-compact green body after drilling, wherein the drill used for drilling has a circular-arc shaped cutting edge on a point portion thereof.
Type:
Grant
Filed:
July 7, 2020
Date of Patent:
April 19, 2022
Assignees:
Sumitomo Electric Sintered Alloy, Ltd., Nikken Tool Co., Ltd.
Abstract: Provided is a method for manufacturing a sintered component, which can suppress occurrence of edge chipping when a through-hole is formed in a powder-compact green body and also has a good productivity. The method for manufacturing a sintered component includes a molding step of press-molding a raw material powder containing a metal powder and thus fabricating a powder-compact green body; a drilling step of forming a hole in the powder-compact green body using a drill; a sintering step of sintering the powder-compact green body after drilling, wherein the drill used for drilling has a circular-arc shaped cutting edge on a point portion thereof.
Type:
Application
Filed:
July 7, 2020
Publication date:
October 22, 2020
Applicants:
SUMITOMO ELECTRIC SINTERED ALLOY, LTD., NIKKEN TOOL CO., LTD.
Abstract: A drill comprising a drill shank having a taper portion adjacent to a threaded portion provided on the rear or basal portion of the shank. When the drill is screwed into an axial hole in a drill holder of a drilling machine, the opening edge or inner tapered wall of the axial hole of the drill holder bites into the taper portion of the drill shank, consequently to bring the drill into firm connection with the drill holder of the drilling machine.
Type:
Grant
Filed:
August 28, 1987
Date of Patent:
August 8, 1989
Assignees:
Nikken Tool Co., Ltd., Yoshino Seiki Inc.