Powder metallurgy bimetal sliding plate for automobile air conditioner compressor

Abstract

A powder metallurgy bimetal sliding disc for an automobile air conditioner compressor comprises a base body, the upper surface and the lower surface of a web of the base body are respectively combined with a layer of copper alloy, and the powder metallurgy bimetal sliding disc is characterized in that the base body is a powder metallurgy base body, and the powder metallurgy base body and the copper alloy are combined and fixed through sintering heating. The material of the powder metallurgy base body is made of iron, carbon and copper, and the material of the copper alloy is made of CuSn8Ni1. The utility model has reasonable structural design, not only effectively solves the problems of durability and noise of parts, but also prolongs the service life of the parts, and simultaneously has light weight and reduced noise.

Description

Technical Field

[0001] The utility model belongs to the technical field of powder metallurgy and relates to a compressor part, in particular to a powder metallurgy bimetallic sliding plate for an automobile air-conditioning compressor. Background Art

[0002] Powder metallurgy is a process technology that uses metal or metal powder as raw material, and through forming and sintering, manufactures metal materials, composites and various types of products. It is widely used in various fields. Because powder metallurgy has unique chemical composition and mechanical and physical properties that cannot be obtained by traditional melting and casting methods, it can be used to manufacture various powder metallurgy parts for automobiles, motorcycles, textile machinery, power tools, hardware tools, electrical appliances, etc.

[0003] Traditional automotive air-conditioning compressor slides are machined from copper alloy castings, but this structure is relatively expensive. With rising raw metal prices, the overall copper alloy structure has shifted to a bimetallic structure. For example, Chinese patent number CN201510613713.X, "A Method and Mold for Preparing a Bimetallic Composite Slide for an Automotive Air-Conditioning Compressor," utilizes copper plating or spraying an adhesive layer on the substrate surface. A dedicated powder-laying sintering mold then applies copper alloy powder to both sides of the substrate, achieving a single, double-sided sintering process. This process then uses a pendulum-rolling method for densification, followed by a final tempering treatment. This strengthens the bond between the copper alloy layer and the base metal and eliminates work hardening.

[0004] This structure uses a steel base, with copper alloy powder evenly applied to both surfaces. Sintering and heating combine the steel and copper alloy, followed by surface densification through extrusion and machining to achieve the desired dimensions. However, this structure has the following drawbacks: 1. It is heavy, the bond between the steel base and the copper alloy is not ideal, and the durability of the part is poor; 2. It is also noisy. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a powder metallurgy bimetallic sliding plate for automobile air-conditioning compressors with reasonable structural design, light weight, good durability and low noise in response to the above technical status quo.

[0006] The technical solution adopted by the present invention to solve the above technical problems is: a powder metallurgy bimetallic sliding plate for an automobile air-conditioning compressor, comprising a base, and a layer of copper alloy is respectively bonded to the upper and lower surfaces of the web of the base, characterized in that: the base adopts a powder metallurgy base, and the powder metallurgy base and the copper alloy are fixed by sintering and heating.

[0007] Preferably, the material of the powder metallurgy matrix is ​​iron, carbon and copper, and the material of the copper alloy is CuSn8Ni1.

[0008] Furthermore, the web thickness of the substrate is greater than 5 mm, and the copper alloy layer has a thickness greater than 0.2 mm.

[0009] Finally, the powder metallurgy matrix and the copper alloy are in a metallurgical bonding state, and after the two are bonded, a surface densification process and a cutting process are performed to obtain a finished product structure.

[0010] Compared with existing technologies, the advantages of this utility model lie in replacing the traditional steel base with a powder metallurgy forming process. The powder metallurgy base and copper alloy are bonded together through sintering and heating. The porous structure of the powder metallurgy not only reduces the overall weight of the part, strengthens the bond between the base and the copper alloy, but also helps reduce assembly noise. This rational structural design effectively solves the durability and noise issues of the part, extending its service life while also reducing weight and reducing noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic structural diagram of an embodiment of the present utility model;

[0012] Figure 2 for Figure 1 Sectional view along line AA. DETAILED DESCRIPTION

[0013] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0014] like Figure 1 、 2 As shown, a powder metallurgy bimetallic sliding disc for automotive air-conditioning compressors comprises a base 1, with a layer of copper alloy 2 bonded to the upper and lower surfaces of the web. The base 1 is made of powder metallurgy and is fixed to the copper alloy 2 by sintering and heating. The powder metallurgy base 1 is made of iron, carbon, and copper, with a web thickness greater than 5 mm. The copper alloy 2 is made of CuSn8Ni1, with a thickness greater than 0.2 mm.

[0015] The powder metallurgy matrix 1 and the copper alloy 2 are in a metallurgical bonding state. After the two are bonded, a surface densification process and a cutting process are performed to obtain a finished product structure.

[0016] During processing, powder metallurgy iron-carbon-copper material is used as the substrate 1, and a layer of copper alloy 2 is sintered on the web planes on both sides of the substrate 1. The finished structure is then obtained through surface densification and cutting processes.

[0017] This embodiment uses a powder metallurgy substrate 1 to replace the traditional steel substrate, which greatly reduces the overall weight. Due to the porous structure of the powder metallurgy substrate 1, not only does it make the copper alloy 2 and the substrate 1 more firmly bonded, increasing durability, but the porous structure also helps to reduce noise.

[0018] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A powder metallurgy bimetallic sliding plate for an automotive air-conditioning compressor, the bimetallic sliding plate comprising a base, the upper and lower surfaces of the web of the base being bonded with a layer of copper alloy, characterized in that: The matrix is ​​a powder metallurgy matrix, and the powder metallurgy matrix is ​​fixed to the copper alloy through sintering and heating.

2. The powder metallurgy bimetallic sliding plate for automobile air-conditioning compressor according to claim 1, characterized in that: The web thickness of the substrate is greater than 5 mm, and the copper alloy layer is greater than 0.2 mm.

3. The powder metallurgy bimetallic sliding plate for automobile air-conditioning compressor according to claim 1 or 2, characterized in that: The powder metallurgy matrix and the copper alloy are in a metallurgical bonding state, and after the two are bonded, a surface densification process and a cutting process are performed to obtain a finished product structure.

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