Thin-wall bonded self-lubricating plate

Abstract

Disclosed is a thin-wall bonded self-lubricating plate, the composite material structure thereof being composed of a surface self-lubricating layer, an intermediate bonding layer, and a metal backing layer. The surface self-lubricating layer includes polytetrafluoroethylene, ultrahigh molecular weight polyethylene, etc. The surface self-lubricating layer thereof is thicker than an ordinary sintered self-lubricating material, thereby reducing vibration and prolonging the service life. Components, such as bushings, gaskets, sliding plates, composite bearings and other special-shaped members, made of the thin-wall bonded self-lubricating plate, have broad application prospects in low-speed rotation and relative sliding parts of vehicles, general machinery, office furniture, etc.

Claims

1. A self-lubricating plate, comprising: a surface self-lubricating layer; an intermediate bonding layer; and a metal backing, wherein the surface self-lubricating layer consists of polytetrafluoroethylene, ultrahigh molecular weight polyethylene, and glass fiber powder, and wherein a weight ratio of the polytetrafluoroethylene to the ultrahigh molecular weight polyethylene and the glass fiber powder in the surface self-lubricating layer is 65: 15: 20.

2. The self-lubricating plate according to claim 1, wherein the surface self-lubricating layer comprises a cylinder shape.

3. The self-lubricating plate according to claim 1, wherein the intermediate bonding layer is a thermosetting polymer bonding material or a thermoplastic polymer bonding material.

4. The self-lubricating plate according to claim 3, wherein the thermosetting polymer bonding material is an epoxy resin, a phenolic resin, or a thermosetting polyimide resin.

5. The self-lubricating plate according to claim 3, wherein the thermoplastic polymer bonding material is an ethylene vinyl acetate resin, a polyurethane resin, a polyamide resin, or an organic fluorine resin.

6. The self-lubricating plate according to claim 1, wherein the metal backing is a cold-rolled steel plate, an aluminum alloy plate, or a copper alloy plate.

7. The self-lubricating plate according to claim 1, wherein the surface self-lubricating layer includes an extruded cast film layer.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a schematic view showing a structure of a thin-wall bonded self-lubricating plate.

(2) Reference signs: In FIG. 1, 1 denotes a surface self-lubricating layer, 2 denotes an intermediate bonding layer, and 3 denotes a metal backing.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

Examples 1-6

(3) Constituents were weighted and mixed according to a formula, a uniform mixture was subjected to a pressure of about 30 MPa to prepare a cylindrical blank, the cylindrical blank was sintered at about 380° C. and was finally subjected to rotary cutting to obtain a film with a thickness of 0.25 mm, i.e., a surface self-lubricating layer. Performance Test: the surface self-lubricating layer films prepared in Examples 1-6 were tested for wear resistance and friction coefficient, and the friction and wear properties were tested according to National Standard GB-3960. The test results are shown in Table 1 below:

(4) TABLE-US-00001 TABLE 1 Test Results for Examples 1-6 Ultrahigh molecular weight Polytetrafluoroethylene polyethylene Glass fiber powder powder powder Wear Example (parts by (parts by (parts by width/ Friction No. weight) weight) weight) mm Coefficient 1 40 40 20 4.38 0.241 2 45 35 20 4.12 0.215 3 50 30 20 4.18 0.198 4 55 25 20 4.24 0.192 5 60 20 20 4.32 0.189 6 65 15 20 3.98 0.185

(5) As can be seen from Table 1, when the weight ratio of the polytetrafluoroethylene powder to the ultrahigh molecular weight polyethylene powder and the glass fiber powder was 65:15:20, both the wear width and the friction coefficient could reach the lowest values.

Comparative Example 1

(6) The ultrahigh molecular weight polyethylene in Example 1 was replaced by polyetheretherketone powder, and other parameters remained unchanged, and the test results are shown in Table 2 below:

(7) TABLE-US-00002 TABLE 2 Test Results for Comparative Example Polytetrafluoroethylene Polyetheretherketone Glass fiber powder powder powder Wear (parts by (parts by (parts by width/ Friction weight) weight) weight) mm Coefficient Comparative 40 40 20 4.26 0.262 Example 1

(8) Finally, it should be noted that many other variations and modifications are surely possible in light of the above teachings, but it's impossible and not necessary to list all the embodiments herein. Other obvious variations or modifications based on this disclosure shall fall within the scope of the invention.