Swash plate and method of manufacturing swash plate

Patent metadata

Field	Value
Publication number	US-10408202-B2
Application number	US-201615055268-A
Country	US
Kind code	B2
Filing date	Feb 26, 2016
Priority date	Nov 5, 2015
Publication date	Sep 10, 2019
Grant date	Sep 10, 2019

Abstract

A swash plate includes 34.5 to 43.0 wt % of copper (Cu) and 0.5 to 2.8 wt % of silicon (Si), with a remainder of aluminum (Al) and other inevitable impurities.

First claim

What is claimed is:

1. A swash plate, comprising:
34.5 to 43.0 wt % of copper (Cu) and 0.5 to 2.8 wt % of silicon (Si), with a remainder of aluminum (Al) and other inevitable impurities,
wherein the swash plate has a tensile strength of 400 MPa or more.

2. The swash plate of claim 1 , wherein the swash plate includes a plurality of core pin holes, the core pin holes being formed toward a center along an outer circumferential surface thereof.

3. The swash plate of claim 2 , wherein the core pin holes comprise a diameter of ½ or less of a thickness of the swash plate.

4. The swash plate of claim 1 , wherein the swash plate has a primary Al 2 Cu phase and an Al—Al 2 Cu lamella structure.

5. The swash plate of claim 4 , wherein the swash plate has a primary Al 2 Cu phase fraction of 10 to 50 vol % and an elastic modulus of 120 GPa or more.

6. The swash plate of claim 1 , wherein the swash plate has a tensile strength of 400 MPa or more and a castability evaluation factor (C) of 2.0 or more, as defined by Equation 1 below:
Castability evaluation factor ( C )=liquidus temperature ( K )/{liquidus temperature ( K )−(quantity of heat ( Q )×composition ( F ))}.  Equation 1:

7. A method of manufacturing a swash plate, comprising:
preparing an aluminum alloy melt comprising 34.5 to 43.0 wt % of copper (Cu) and 0.5 to 2.8 wt % of silicon (Si), with a remainder of aluminum (Al) and other inevitable impurities;
casting the aluminum alloy melt using a mold having a plurality of core pins; and
removing the core pins from the mold and separating the swash plate from the mold and wherein the swash plate has a tensile strength of 400 MPa or more.

8. The method of claim 7 , wherein the casting is performed through gravity casting or centrifugal casting.

9. The method of claim 7 , wherein the casting is performed at a temperature of 595 to 625° C.

10. The method of claim 7 , wherein the core pins have a thickness of ½ or less of a thickness of the swash plate.

11. The method of claim 7 , wherein the swash plate has a primary Al 2 Cu phase fraction of 10 to 50 vol % and an elastic modulus of 120 GPa or more.

12. The method of claim 7 , wherein the swash plate has a tensile strength of 400 MPa or more and a castability evaluation factor (C) of 2.0 or more, as defined by Equation 1 below:
Castability evaluation factor ( C )=liquidus temperature ( K )/{liquidus temperature ( K )−(quantity of heat( Q )×composition ( F ))}.  Equation 1:

Assignees

• Hyundai Motor Co Ltd

Inventors

• Kang Hee Sam

Classifications

• F05C2203/06

  Silicon · CPC title

• F04B27/086 Primary

  swash plate · CPC title

• F05C2201/0475

  Copper or alloys thereof · CPC title

• F04B27/1054

  Actuating elements · CPC title

• F05C2253/12

  Coating · CPC title