Sliding member and method for producing same

Patent metadata

Field	Value
Publication number	US-2022314318-A1
Application number	US-202217711227-A
Country	US
Kind code	A1
Filing date	Apr 1, 2022
Priority date	Apr 2, 2021
Publication date	Oct 6, 2022
Grant date	—

Abstract

Provided is a method for producing a sliding member formed by impregnating a porous base member made of a bronze-based alloy with a resin material, the sliding member including a sliding surface where both the porous base member and the resin material are exposed, the method including: a step of preparing a back metal layer; a porous base member formation step of forming the porous base member by depositing particles of the bronze-based alloy on a surface of the back metal layer and sintering the particles; an impregnation step of impregnating the porous base member with the resin material; a deformation step of deforming an end edge of the back metal layer in a direction away from the sliding surface; and a cutting step of cutting the porous base member impregnated with the resin material to form the sliding surface.

First claim

1 . A sliding member formed by impregnating a porous base member made of a bronze-based alloy with a resin material, the sliding member comprising:
a sliding surface where both the porous base member and the resin material are exposed, wherein an exposed area ratio of the porous base member at an end edge of the sliding surface is less than an exposed area ratio at a central portion of the sliding surface.

2 . The sliding member according to claim 1 ,
wherein a width of the end edge is 5 mm or less.

3 . The sliding member according to claim 1 ,
wherein the porous base member constituting the end edge of the sliding surface is thicker than other portions of the porous base member.

4 . The sliding member according to claim 3 ,
wherein the porous base member is formed on a surface of a back metal layer, and the back metal layer is deformed in a direction away from the sliding surface at a portion of the back metal layer supporting the end edge.

5 . A process for producing a sliding member formed by impregnating a porous base member made of a bronze-based alloy with a resin material, the sliding member including a sliding surface where both the porous base member and the resin material are exposed, the method comprising:
a step of preparing a back metal layer; a porous base member formation step of forming the porous base member by depositing particles of the bronze-based alloy on a surface of the back metal layer and sintering the particles; an impregnation step of impregnating the porous base member with the resin material; a deformation step of deforming an end edge of the back metal layer in a direction away from the sliding surface; and a cutting step of cutting the porous base member impregnated with the resin material to form the sliding surface.

6 . The process for producing a sliding member according to claim 5 ,
wherein the deformation step is performed after the impregnation step.

7 . The process for producing a sliding member according to claim 5 ,
wherein the deformation step is performed before the impregnation step.

8 . The process for producing a sliding member according to claim 5 ,
wherein, after the impregnation step, the back metal layer including the porous base member impregnated with the resin material is cut to a product width to form a first intermediate, the first intermediate is molded to a predetermined cylindrical shape, and an end edge of the first intermediate is deformed in a direction away from the sliding surface to form a second intermediate, and the porous base member impregnated with the resin material in the second intermediate is cut to form the sliding surface.

9 . The process for producing a sliding member according to claim 5 ,
wherein, after the impregnation step, the back metal layer including the porous base member impregnated with the resin material is cut to a product width to form a first intermediate, an end edge of the first intermediate is deformed in a direction away from the sliding surface, the first intermediate thus deformed is molded into a predetermined cylindrical shape to form a second intermediate, and the porous base member impregnated with the resin material in the second intermediate is cut to form the sliding surface.

10 . A process for producing a sliding device including a sliding member formed by impregnating a porous base member made of a bronze-based alloy with a resin material, the sliding member including a sliding surface where both the porous base member and the resin material are exposed, and a housing, the method comprising:
a step of preparing a back metal layer; a porous base member formation step of forming the porous base member by depositing particles of the bronze-based alloy on a surface of the back metal layer and sintering the particles; an impregnation step of impregnating the porous base member with the resin material; a deformation step of deforming an end edge of the back metal layer in a direction away from the sliding surface; a pressing step of pressing the back metal layer into the housing; and a cutting step of cutting the porous base member impregnated with the resin material to form the sliding surface.

11 . The process for producing a sliding device according to claim 10 ,
wherein the deformation step is performed after the impregnation step.

12 . The process for producing a sliding device according to claim 10 ,
wherein the deformation step is performed before the impregnation step

13 . The process for producing a sliding device according to claim 10 ,
wherein, after the impregnation step, the back metal layer including the porous base member impregnated with the resin material is cut to a product width to form a first intermediate, the first intermediate is molded to a predetermined cylindrical shape, and an end edge of the first intermediate is deformed in a direction away from the sliding surface to form a second intermediate, and in the pressing step, the back metal layer of the second intermediate is pressed into the housing.

14 . The process for producing a sliding device according to claim 10 ,
wherein, after the impregnation step, the back metal layer including the porous base member impregnated with the resin material is cut to a product width to form a first intermediate, an end edge of the first intermediate is deformed in a direction away from the sliding surface, the first intermediate thus deformed is formed into a predetermined cylindrical shape to form a second intermediate, the porous base member impregnated with the resin material in the second intermediate is cut to form the sliding surface, and in the pressing step, the back metal layer of the second intermediate is pressed into the housing.

Assignees

• Daido Metal Co

Inventors

• Yamamoto Ayako
• Ito Yoshifumi
• Watanabe Norihito
• Inoue Hirotaka
• Matsuoka Akihiro

Classifications

• F16C33/24

  with different areas of the sliding surface consisting of different materials · CPC title

• F16C2223/40

  by dipping in molten material · CPC title

• F04C29/00

  Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00 · CPC title

• F16C33/121

  Use of special materials · CPC title

• F16C33/128 Primary

  Porous bearings, e.g. bushes of sintered alloy · CPC title