Modified polyether ketone plastic sliding bearing

Abstract

The utility model relates to a modified polyetherketone plastic sliding bearing, which consists of a metal matrix (1) and a composite bearing surface (2), the surface of the metal matrix (1) is transversely provided with a transverse groove (4) and longitudinally provided with a longitudinal groove (3), the longitudinal groove (3) is communicated with the transverse groove (4), the depth of the longitudinal groove (3) is smaller than that of the transverse groove (4), and a metal rod (5) of which the diameter is close to the width of the groove is welded in the longitudinal groove (3). The utility model has the characteristics that the groove is filled with the modified polyether ketone plastic, and the modified polyether ketone plastic is firmly wrapped on the surface of the metal rod, so that the combination firmness can be ensured, and in addition, due to the buffering effect of the metal rod, part of internal stress can be absorbed, and the size stability can be ensured.

Description

Technical Field

[0001] The utility model relates to a modified polyetherketone plastic sliding bearing, belonging to the technical field of composite material sliding bearings. Background Art

[0002] Polyetherketone plastics (including polyetheretherketone PEEK, polyetherketone PEK, polyaryletherketone PAEK, etc.) as a polymer material have the characteristics of high strength, good toughness, thermal stability, wear resistance, etc. The modified materials are more suitable for bearing materials with wear / friction, heavy load, high temperature, high speed, self-lubrication, and long service life.

[0003] At present, the sliding bearings made of such materials, such as the composite process of PEEK and metal matrix, generally adopt the method of machining trapezoidal grooves on the metal surface to composite and modify PEEK plastic, or weld copper powder or metal wire mesh on the metal surface and then composite PEEK plastic. Due to the large difference in linear expansion coefficients of various materials, the internal stress changes greatly when the temperature changes, which can easily cause the two to separate when the bearing load is large and used for a long time. Summary of the invention

[0004] The utility model aims to provide a modified polyetherketone plastic sliding bearing, which overcomes the defects of the existing composite method and effectively solves the problems in the background.

[0005] The utility model discloses a modified polyetherketone plastic sliding bearing, which is composed of a metal matrix 1 and a composite bearing surface 2.

[0006] The metal substrate 1 has transverse grooves 4 on its surface and longitudinal grooves 3 in the longitudinal direction. The longitudinal grooves 3 are connected with the transverse grooves 4 and have a depth smaller than that of the transverse grooves 4. A metal rod 5 with a diameter similar to the groove width is welded in the longitudinal grooves 3.

[0007] The metal substrate 1 can be made of ordinary steel, stainless steel or other metals. The transverse grooves 4 are processed with a width of 2mm-30mm, a depth of 5mm-15mm, and a spacing of 5mm-50mm. The longitudinal grooves 3 are processed with a width of 2mm-20mm, a depth of 2mm-10mm, and a spacing of 2mm-20mm.

[0008] The longitudinal groove 3 can be drilled with a 2mm-10mm round hole in the longitudinal direction, and the metal rod 5 is embedded in the round hole.

[0009] The composite bearing surface 2 injects the modified polyetherketone plastic into the surface of the metal matrix 1 in the mold so that all the grooves are filled and firmly wrapped around the metal rod 5.

[0010] The utility model is characterized in that the modified polyetherketone plastic fills the groove and wraps the surface of the metal rod firmly, so that the firmness of the combination can be ensured. In addition, due to the buffering effect of the metal rod, part of the internal stress can be absorbed to ensure the stability of the size. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the utility model.

[0012] In the figure: 1. metal substrate, 2. composite bearing surface, 3. longitudinal groove, 4. transverse groove, 5. metal rod. Specific implementation plan

[0013] The ratios of modified polyether ketone plastics are as follows: ① modified polyether ether ketone (PEEK) PEEK 60-80%, PTFE 5-15%, carbon fiber 10-30% by weight; the best ratio is PEEK 70%, PTFE 10%, carbon fiber 20% by weight, which are dried and used for later use;

[0014] ② Modified polyether ketone (PEK) 60-80% PEK, 20-40% aramid fiber by weight; the best ratio is 60% PEK, 40% aramid fiber by weight;

[0015] ③ Modified polyaryletherketone (PAEK) PAEK 70-80% by weight, carbon fiber (or glass fiber) 20-30%; the best ratio is PAEK 70% by weight, carbon fiber 30%.

[0016] One of the modified composite materials ①②③ is made into a composite bearing surface 2.

[0017] Processing of metal substrate: Select appropriate material as the bearing metal substrate 1 such as stainless steel according to the final size and material requirements of the sliding bearing, and process transverse grooves 4 with a depth of 10mm, a width of 10mm and a spacing of 10mm in the transverse direction of the metal substrate 1, and process longitudinal grooves 3 with a depth of 5mm, a width of 5mm and a spacing of 10mm in the longitudinal direction. Then, a metal rod 5 with a diameter of 5mm is embedded in the longitudinal groove 3, and the metal rod is welded firmly with electric welding.

[0018] The longitudinal groove 3 can also be drilled with a Ø5 circular hole in the longitudinal direction, with the center of the circle 2 mm-2.5 mm away from the surface of the metal substrate 1 and a spacing of 10 mm, and then a metal rod 5 with a diameter of 5 mm is embedded in the hole.

[0019] The metal substrate 1 with a smooth surface treatment is placed in a specific mold, and the polyetherketone plastic is filled into the mold cavity at a pressure of 11 MPa using an injection molding machine to complete the composite bearing surface 2. After cooling and demolding, it is processed to the corresponding size according to the drawing requirements.

Claims

1. A modified polyetherketone plastic sliding bearing, comprising a metal matrix (1) and a composite bearing surface (2), characterized in that: The metal substrate (1) has a transverse groove (4) on its surface in the transverse direction and a longitudinal groove (3) in the longitudinal direction. The longitudinal groove (3) is connected with the transverse groove (4) and has a depth smaller than that of the transverse groove (4). A metal rod (5) having a diameter similar to the groove width is welded in the longitudinal groove (3).

2. A modified polyetherketone plastic sliding bearing according to claim 1, characterized in that: The metal substrate (1) can be made of ordinary steel, stainless steel or other metals. The transverse grooves (4) are processed with a width of 2mm-30mm, a depth of 5mm-15mm, and a spacing of 5mm-50mm. The longitudinal grooves (3) are processed with a width of 2mm-20mm, a depth of 2mm-10mm, and a spacing of 2mm-20mm.

3. The modified polyetherketone plastic sliding bearing according to claim 1, characterized in that: The longitudinal groove (3) can be drilled with a 2mm-10mm round hole in the longitudinal direction, and the metal rod (5) is embedded in the round hole.

4. The modified polyetherketone plastic sliding bearing according to claim 1, characterized in that: The composite bearing surface (2) is formed by injecting a modified polyetherketone plastic into the surface of the metal matrix (1) in a mold so that all grooves are filled and the plastic is firmly wrapped around the metal rod (5).

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