CN112983972A - High-performance composite material sliding bearing and preparation method thereof - Google Patents
High-performance composite material sliding bearing and preparation method thereof Download PDFInfo
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- CN112983972A CN112983972A CN202110373854.4A CN202110373854A CN112983972A CN 112983972 A CN112983972 A CN 112983972A CN 202110373854 A CN202110373854 A CN 202110373854A CN 112983972 A CN112983972 A CN 112983972A
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- 239000002131 composite material Substances 0.000 title claims abstract description 117
- 238000002360 preparation method Methods 0.000 title abstract description 7
- 229910052802 copper Inorganic materials 0.000 claims abstract description 318
- 239000010949 copper Substances 0.000 claims abstract description 318
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 261
- 239000010410 layer Substances 0.000 claims abstract description 81
- 239000011229 interlayer Substances 0.000 claims abstract description 13
- 239000000758 substrate Substances 0.000 claims abstract description 10
- 239000007769 metal material Substances 0.000 claims abstract description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 42
- 229910000906 Bronze Inorganic materials 0.000 claims description 38
- 239000010974 bronze Substances 0.000 claims description 38
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 claims description 38
- 238000005245 sintering Methods 0.000 claims description 31
- 238000005219 brazing Methods 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 18
- 229910000831 Steel Inorganic materials 0.000 claims description 17
- 150000001879 copper Chemical class 0.000 claims description 17
- 238000005520 cutting process Methods 0.000 claims description 17
- 239000010959 steel Substances 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 15
- 238000013329 compounding Methods 0.000 claims description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 12
- 229910002804 graphite Inorganic materials 0.000 claims description 12
- 239000010439 graphite Substances 0.000 claims description 12
- 229920006260 polyaryletherketone Polymers 0.000 claims description 10
- -1 polytetrafluoroethylene Polymers 0.000 claims description 8
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 8
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 8
- 229910001369 Brass Inorganic materials 0.000 claims description 7
- 239000010951 brass Substances 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 7
- 230000002146 bilateral effect Effects 0.000 claims description 6
- 238000009770 conventional sintering Methods 0.000 claims description 6
- 238000009792 diffusion process Methods 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 claims description 6
- 238000003754 machining Methods 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 6
- 238000001746 injection moulding Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 229910052790 beryllium Inorganic materials 0.000 claims description 3
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 claims description 3
- 238000004381 surface treatment Methods 0.000 claims description 3
- BSPSZRDIBCCYNN-UHFFFAOYSA-N phosphanylidynetin Chemical compound [Sn]#P BSPSZRDIBCCYNN-UHFFFAOYSA-N 0.000 claims 1
- 239000004033 plastic Substances 0.000 abstract description 9
- 229920003023 plastic Polymers 0.000 abstract description 9
- 229910052751 metal Inorganic materials 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- 238000000748 compression moulding Methods 0.000 description 8
- 229920006351 engineering plastic Polymers 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- 238000009941 weaving Methods 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- YWIHFOITAUYZBJ-UHFFFAOYSA-N [P].[Cu].[Sn] Chemical compound [P].[Cu].[Sn] YWIHFOITAUYZBJ-UHFFFAOYSA-N 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000004696 Poly ether ether ketone Substances 0.000 description 2
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 description 2
- 238000010924 continuous production Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 229920002530 polyetherether ketone Polymers 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000805 composite resin Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007723 die pressing method Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000005476 soldering Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/12—Structural composition; Use of special materials or surface treatments, e.g. for rust-proofing
- F16C33/122—Multilayer structures of sleeves, washers or liners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/14—Special methods of manufacture; Running-in
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
The invention provides a high-performance composite material sliding bearing and a preparation method thereof. The invention comprises a substrate, a connecting layer and a composite layer; the substrate is made of a metal material; the connecting layer comprises a copper mesh-copper sheet composite connecting structure, the copper mesh-copper sheet composite connecting structure comprises a copper sheet interlayer and a copper mesh, the copper mesh is connected with the composite layer formed by the composite material, and the other side of the copper mesh-copper sheet composite connecting structure is fixedly connected with the base body. The invention adopts the copper mesh-copper sheet composite connection structure, the middle copper sheet interlayer can prevent the composite material of the composite layer from leaking, the connection mode effectively enhances the integral rigidity of the metal-plastic composite material, and has better dimensional stability.
Description
Technical Field
The invention relates to the technical field of bearings, in particular to a high-performance composite material sliding bearing and a preparation method thereof.
Background
At present, a three-layer composite structure is usually adopted for manufacturing a modified polytetrafluoroethylene sliding bearing, resin and metal are combined together through an intermediate connecting layer, particularly, for an existing elastic metal plastic tile, a metal wire pad is pressed, cold-pressed resin and hot-formed to manufacture a bearing bush, but the manufacturing process of the metal wire pad is complicated, and the biggest defect is that continuous production cannot be realized, so that the defects of slow time rhythm and large monomer difference are caused.
The composite material bearing formed by metal and polyaryletherketone engineering plastics has a plurality of structures, for example, a PEEK composite material sliding bearing disclosed in Chinese patent CN2886176Y patent document takes steel as a base material, a copper powder layer is sintered on the surface of the steel, and then the PEEK material and the copper powder layer are sintered. However, the surface smoothness, density uniformity and porosity of the sintered copper powder in the structure cannot reach ideal conditions.
The prior art also discloses a metal plastic composite bearing, which is characterized in that a copper mesh framework is formed by sintering stacked multiple layers of copper meshes, then filling engineering plastics are spread on the surface of the copper mesh framework, a laminated copper mesh plastic composite material is formed by die pressing, sintering and plasticizing, and then different bearings are formed by cutting and rolling or brazing the copper mesh plastic composite material and a steel tile base. However, when the metal framework and the engineering plastic are compounded in the composite structure, the gap of the metal framework is filled with the engineering plastic, and the brazing quality is reduced when the metal framework and the steel matrix are welded, so that the bonding strength of the copper mesh plastic composite material and the steel matrix is reduced.
Disclosure of Invention
According to the technical problems provided by the invention, the high-performance composite sliding bearing has the advantages of high temperature resistance, good self-lubricating property and good weather resistance, can be used under the working conditions of no lubrication and low speed and heavy load or under the severe environments of liquid and solid dust pollution and the like, and is suitable for the fields of hydropower, wind power, gear boxes, military industry and the like.
The technical means adopted by the invention are as follows:
a high-performance composite material sliding bearing comprises a substrate, a connecting layer and a composite layer;
the substrate is made of a metal material;
the connecting layer comprises a copper mesh-copper sheet composite connecting structure, the copper mesh-copper sheet composite connecting structure comprises a copper sheet interlayer and a copper mesh, the copper mesh is connected with the composite layer formed by the composite material, and the other side of the copper mesh-copper sheet composite connecting structure is fixedly connected with the base body.
Further, the copper mesh-copper sheet composite connection structure is a copper mesh-copper sheet double-side structure or a copper mesh-copper sheet single-side structure, the copper mesh-copper sheet single-side structure is formed by weaving a laminated copper mesh on one of two sides of a copper sheet, and the copper mesh-copper sheet double-side structure is formed by weaving laminated copper meshes on two sides of the copper sheet;
the copper mesh is arranged on two sides of the copper sheet interlayer of the copper mesh-copper sheet bilateral structure, the top end of the upper copper mesh is connected with the composite layer, and the bottom end of the lower copper mesh is connected with the base body in a brazing mode;
the copper mesh is arranged on one side of the copper sheet interlayer of the copper mesh-copper sheet unilateral structure, the top end of the upper copper mesh is connected with the composite layer, and the bottom end of the lower copper sheet is connected with the base body in a brazing mode.
Furthermore, the copper mesh is a laminated copper mesh, namely the copper mesh is formed by overlapping and weaving a plurality of layers of copper meshes, the materials and the mesh numbers of the adjacent copper meshes are the same or different, and the materials, the mesh numbers and the layer numbers of the copper meshes on the two sides of the copper sheet are the same or different.
Further, the copper mesh is a tin bronze mesh or a brass mesh, and the copper sheet is a tin bronze sheet, a tin phosphor copper sheet or a beryllium bronze sheet.
Furthermore, the diameter of the copper mesh is 0.1mm to 0.5mm, the mesh number of the mesh is 20 meshes to 100 meshes, and the thickness of the copper sheet is 0.05mm to 0.2 mm.
Further, the laminated copper mesh comprises 1-4 layers of the stacked copper meshes, and the warp and weft directions of the two adjacent layers of the copper meshes are staggered by 0-90 degrees.
Further, the copper mesh is 3 layers, and comprises a 60-mesh tin bronze sheet bottom layer, a 20-mesh tin bronze sheet and a 60-mesh tin bronze sheet, wherein the 20-mesh tin bronze sheet and the 60-mesh tin bronze sheet are stacked on the tin bronze sheet bottom layer.
The invention also discloses a preparation method of the high-performance composite material sliding bearing, which comprises the following steps:
the method comprises the following steps: the method comprises the following steps of (1) pretreating a copper mesh and a copper sheet, wherein the pretreatment mainly comprises the cutting of the copper mesh and the copper sheet and the surface treatment of the cut copper mesh and the cut copper sheet;
step two: placing the copper mesh with the preset number of layers at a preset position of the copper sheet, placing the whole body in a gas protection chain type sintering furnace, setting the sintering temperature as the diffusion temperature of the copper mesh, and sintering according to a conventional sintering process technology, wherein the sintering temperature is 930-980 ℃, and the rotating speed is 5-15 r/min;
step three: leveling the sintered copper mesh-copper sheet composite connecting structure and then cutting the copper mesh-copper sheet composite connecting structure into a required size;
step four: compounding the high-performance composite material with the copper mesh-copper sheet composite structure according to the existing mould pressing or injection molding process;
step five: after the composite layer is dipped in tin, the composite layer and steel bases with different geometric shapes are combined together by brazing, and then the thrust bearing bushes with different specifications are manufactured by mechanical finish machining.
Further, in the second step, the bottom of the copper mesh-copper sheet composite connection structure is placed on a graphite plate with the thickness of 20-40 mm, and a graphite plate is placed on the top copper mesh.
Further, the high-performance composite material comprises modified polytetrafluoroethylene powder or sheet and powder or sheet of modified polyaryletherketone material.
The invention adopts a copper mesh-copper sheet composite connection structure, and the middle copper sheet interlayer can prevent the composite material of the composite layer from leaking, and the connection mode effectively enhances the integral rigidity of the metal-plastic composite material and has better dimensional stability. The invention can save raw materials, reduce the processing amount of products and save the cost of raw materials on the basis of the prior art, is more convenient for the automatic continuous production operation of the whole process on the basis of the patent, and reduces the labor cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of a first embodiment of a high-performance composite sliding bearing of the present invention.
In the figure: 1. a substrate; 21. copper sheet; 22. a first type of copper mesh; 23. a second type of copper mesh; 3. and (4) compounding layers.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, an embodiment of the present invention discloses a high-performance composite sliding bearing, including: a substrate, a connecting layer and a composite layer;
the substrate 1 is made of a metal material, and in the embodiment, the substrate is a steel tile base made of steel;
the connecting layer comprises a copper mesh-copper sheet composite connecting structure, the copper mesh-copper sheet composite connecting structure comprises a copper sheet 21 interlayer and a copper mesh, the copper mesh is connected with the composite layer 3 formed by composite materials, the other side of the copper mesh-copper sheet composite connecting structure is fixedly connected with a base body, the copper mesh-copper sheet composite connecting structure is specifically connected with a steel tile base through brazing, the composite layer takes a high-performance resin composite material as a surface working layer, specifically, the copper mesh-copper sheet composite connecting structure is filled with the high-performance composite material, and a resin engineering plastic layer is arranged on the side surface of the copper mesh-copper sheet composite connecting structure.
The copper mesh-copper sheet composite connecting structure is a copper mesh-copper sheet double-side structure or a copper mesh-copper sheet single-side structure, the copper mesh-copper sheet single-side structure is formed by weaving laminated copper meshes on one of two sides of a copper sheet, and the copper mesh-copper sheet double-side structure is formed by weaving laminated copper meshes on two sides of the copper sheet;
the copper mesh is arranged on two sides of the copper sheet interlayer of the copper mesh-copper sheet bilateral structure, the top end of the upper copper mesh is connected with the composite layer, and the bottom end of the lower copper mesh is connected with the base body in a brazing mode;
the copper mesh is arranged on one side of the copper sheet interlayer of the copper mesh-copper sheet unilateral structure, the top end of the upper copper mesh is connected with the composite layer, and the bottom end of the lower copper sheet is connected with the base body in a brazing mode.
The copper mesh is a laminated copper mesh, namely the copper mesh is formed by overlapping and weaving a plurality of layers of copper meshes, the materials and the mesh numbers of the adjacent copper meshes are the same or different, and the materials, the mesh numbers and the layer numbers of the copper meshes on the two sides of the copper sheet are the same or different.
The copper mesh is a tin bronze mesh or a brass mesh, so that the copper mesh has better rigidity and wear resistance. The copper sheet is a tin bronze sheet or a tin-phosphorus copper sheet or a beryllium bronze sheet.
The diameter of the copper mesh is 0.1mm to 0.5mm, the mesh number is 20 meshes to 100 meshes, and the thickness of the copper sheet is 0.05mm to 0.2mm, preferably 0.05mm to 0.15 mm. The copper mesh has proper mesh number, can be well sintered and bonded with the copper sheet, improves the rigidity of the copper mesh, and is convenient for filling engineering plastics and tin immersion soldering.
The laminated copper mesh comprises 1-4 layers of the copper mesh which is laminated, and the warp and weft directions of two adjacent layers of the copper mesh are staggered by 0-90 degrees, so that meshes on two adjacent layers of the copper mesh, namely the first type copper mesh 21 and the second type copper mesh 22 are staggered, the rigidity of the copper mesh after being laminated can be further improved, and the pores are increased. The multilayer copper mesh can be a copper mesh woven by tin bronze wires or brass wires, or a laminated copper mesh woven by 1-2 layers of tin bronze wires or brass wires. The mesh number of the lower copper mesh (close to the copper sheet) is generally 40 to 100 meshes, and the mesh number of the 2 to 4 copper meshes is generally 20 to 60 meshes. More preferably, the warp and weft directions of two adjacent layers of copper mesh are staggered by 45 degrees. Therefore, meshes on the copper nets on two adjacent sides are staggered uniformly, and the performance of the copper nets is more uniform.
In a preferred embodiment, the copper mesh has 3 layers and comprises a 60-mesh tin bronze sheet base layer, a 20-mesh tin bronze sheet and a 60-mesh tin bronze sheet which are stacked on the tin bronze sheet base layer.
The invention adopts the copper mesh-copper sheet composite connection structure, and fills the high-performance composite material in the copper mesh, the copper mesh and the high-performance composite material are tightly connected through compression molding or injection molding, the middle copper sheet interlayer can prevent the high-performance composite material from leaking, and the copper mesh is connected with the steel matrix by brazing after being dipped in tin. The sintering of the copper mesh and the copper sheet effectively improves the bonding strength of the copper mesh-copper sheet structure, the connection mode effectively enhances the integral rigidity of the metal-plastic composite material, has better dimensional stability, and the stacking of the multiple layers of copper meshes and the filling of engineering plastics in the copper mesh framework effectively enhance the integral rigidity of the copper mesh-plastic composite material. When the copper mesh or the copper sheet is brazed with the steel matrix, the use amount of brazing materials is reduced, the process cost is reduced, and the environment is saved. The high-performance composite material has the advantages of high temperature resistance, radiation resistance, good self-lubricating property and good weather resistance, can be used under the working conditions of no lubrication, low speed and heavy load or under the severe environments of liquid, solid dust pollution and the like, and is suitable for the fields of wind power, gear boxes, war industry and the like.
The invention also discloses a preparation method of the high-performance composite material sliding bearing, which comprises the following steps:
the method comprises the following steps: the method comprises the following steps of (1) pretreating a copper mesh and a copper sheet, wherein the pretreatment mainly comprises the cutting of the copper mesh and the copper sheet and the surface treatment of the cut copper mesh and the cut copper sheet;
step two: placing the copper mesh with the preset number of layers at a preset position of the copper sheet, placing the whole body in a gas protection chain type sintering furnace, setting the sintering temperature as the diffusion temperature of the copper mesh, and sintering according to a conventional sintering process technology, wherein the sintering temperature is 930-980 ℃, and the rotating speed is 5-15 r/min;
step three: leveling the sintered copper mesh-copper sheet composite connecting structure and then cutting the copper mesh-copper sheet composite connecting structure into a required size;
step four: compounding the high-performance composite material with the copper mesh-copper sheet composite structure according to the existing mould pressing or injection molding process;
step five: after the composite layer is dipped in tin, the composite layer and steel bases with different geometric shapes are combined together by brazing, and then the thrust bearing bushes with different specifications are manufactured by mechanical finish machining.
Example 1
In this embodiment, a copper mesh-copper sheet bilateral structure, three layers of copper meshes, and modified polyaryletherketone material powder are compression molded, and a formed composite layer is brazed and connected with a steel tile base to form a high-performance composite material bearing, specifically including the following steps:
the method comprises the following steps: and cutting the copper mesh and the copper sheet. Cutting the tin bronze sheet with the thickness of 0.05mm into sheets; the tin bronze net with the mesh number of 60 meshes is cut into sheets according to the warp and weft directions; the tin bronze net with 20 meshes is cut into sheets in a direction of 45 degrees by interlacing with the longitude and latitude lines. Due to different cutting directions, the warp and weft directions of the copper mesh after being stacked are mutually staggered.
Step two: the treatment of the copper net and the copper sheet which are cut and formed mainly comprises leveling and surface oil stain removal, and the preparation is made before sintering.
Step three: the copper sheet and the copper net are placed in good positions, the positions close to the two sides of the copper sheet are tin bronze nets with meshes of 60 meshes and the diameters of the nets are 0.1mm, the middle copper net is a tin bronze net with meshes of 20 meshes which form 45 degrees with the longitude and latitude lines, and the outermost layer is a tin bronze net with meshes of 60 meshes. And (3) placing the laminated copper mesh and the copper sheet on a graphite plate with the thickness of 20-40 mm, placing a graphite plate on the top copper mesh, placing the whole body in a gas protection chain type sintering furnace, setting the sintering temperature as the diffusion temperature of the copper mesh, and sintering according to the conventional sintering process technology. The copper mesh is placed on the graphite plate, and the copper mesh at the bottom can be prevented from directly contacting the hearth, so that the hearth and the copper mesh are prevented from rubbing in the process of placing and taking out the copper mesh, workpieces can conveniently enter and exit the furnace, and the whole copper mesh is heated more uniformly. Place a graphite cake again on top layer copper mesh, produce certain pressure to the copper mesh, prevent in sintering process, copper skin and copper mesh produce the warpage, parameter among the sintering process: the sintering temperature is 930-980 ℃ and the rotating speed is 5-15 r/min.
Step four: leveling the sintered copper mesh-copper sheet structure, cutting into required size, and compounding with modified polyaryletherketone material.
Step five: and (4) compounding and pressing. Selecting a proper mould, firstly placing a certain amount of modified polyaryletherketone material powder in the mould, then lightly placing a copper mesh-copper sheet composite structure on the mould, and carrying out compression molding by using pressure equipment, wherein the molding pressure is 50MPa, and the thickness of the modified polyaryletherketone material layer is about 1-4 mm.
Step six: and (4) compression molding. And carrying out compression molding according to the conventional prior art.
Step seven: and (6) brazing and compounding. After the composite layer is dipped in tin, the composite layer and steel bases with different geometric shapes are combined together by brazing, and then the thrust bearing bushes with different specifications are manufactured by mechanical finish machining.
Example 2
In this embodiment, a copper mesh-copper sheet bilateral structure, two layers of copper meshes, and an example of the composite material being modified polytetrafluoroethylene powder include the following steps:
the method comprises the following steps: and cutting the copper sheet and the copper net. Cutting a tin-phosphorus copper sheet with the thickness of 0.15mm into sheets; the brass net with 60 meshes is cut into sheets according to the directions of the warp and the weft; the tin bronze net with 20 meshes is cut into sheets in a direction of 45 degrees by interlacing with the longitude and latitude lines.
Step two: the treatment of the copper sheet and the copper net which are cut and formed mainly comprises the steps of leveling the copper sheet and the copper net and removing oil stains on the surfaces of the copper sheet and the copper net.
Step three: the copper sheet and the copper net are placed in position, a brass net with meshes of 60 meshes and a diameter of 0.3mm is arranged close to the two sides of the copper sheet, and a 20-mesh tin bronze net with 45 degrees with the longitude and latitude is arranged on the outer layer. And (3) placing the laminated copper mesh and the copper sheet on a graphite plate with the thickness of 20-40 mm, placing a graphite plate on the top copper mesh, placing the whole body in a gas protection chain type sintering furnace, setting the sintering temperature as the diffusion temperature of the copper mesh, and sintering according to the conventional sintering process technology.
Step four: leveling the sintered copper mesh-copper sheet bilateral structure, cutting into a required size, and compounding with a modified polytetrafluoroethylene material.
Step five: and (4) compounding and pressing. Selecting a proper mould, firstly placing a certain amount of modified polytetrafluoroethylene powder in the mould, then lightly placing the copper mesh-copper sheet composite structure on the mould, and carrying out compression molding by using pressure equipment, wherein the molding pressure is 50MPa, and the thickness of the modified polytetrafluoroethylene material layer is about 1-4 mm.
Step six: and sintering and plasticizing, namely placing the pressed and formed composite plate in a gas protection furnace or a vacuum furnace, and sintering and plasticizing under the condition of gas protection or vacuum according to the conventional prior art of the modified polytetrafluoroethylene to form the composite layer.
Step seven: and leveling. Leveling the composite layer according to the prior art.
Step seven: and (6) brazing and compounding. After the composite layer is dipped in tin, the composite layer and steel bases with different geometric shapes are combined together by brazing, and then the thrust bearing bushes with different specifications are manufactured by mechanical finish machining.
Example 3
In this embodiment, a copper mesh-copper sheet single-side structure and two layers of copper meshes are adopted, and the composite material is a modified polyaryletherketone sheet, and the method for manufacturing the bearing of the third embodiment specifically comprises the following steps:
the method comprises the following steps: and cutting the copper sheet and the copper net. Cutting the copper sheet with the thickness of 0.2mm into a required size; the tin bronze net with the mesh number of 100 meshes is cut into strips according to the warp and weft directions; the tin bronze net with the mesh number of 60 meshes is cut into pieces in the direction of 45 degrees staggered with the longitude and latitude lines.
Step two: the treatment of the copper sheet and the copper net which are cut and formed mainly comprises the steps of leveling the strip-shaped copper net, removing oil stains on the surface of the copper net and preparing for the pre-sintering.
Step three: the copper sheet and the copper net are placed in position, the tin bronze net with the mesh number of 100 meshes and the diameter of 0.3mm is arranged close to the two sides of the copper sheet, and the tin bronze net with the mesh number of 60 meshes forming an angle of 45 degrees with the longitude and latitude is arranged on the outer layer. And (3) placing the laminated copper mesh and the copper sheet on a graphite plate with the thickness of 20-40 mm, placing a graphite plate on the top copper mesh, placing the whole body in a gas protection chain type sintering furnace, setting the sintering temperature as the diffusion temperature of the copper mesh, and sintering according to the conventional sintering process technology.
Step four: leveling the sintered copper mesh-copper sheet single-side structure, cutting into required size, and compounding with modified polyaryletherketone material.
Step five: and (4) compounding and pressing. Selecting a proper mould, firstly placing a certain amount of modified polyaryletherketone sheet in the mould, then lightly placing a copper mesh-copper sheet single-side structure on the mould, and carrying out compression molding by using pressure equipment, wherein the molding pressure is 50MPa, and the thickness of the high-performance composite material layer is about 1-4 mm.
Step six: and (4) compression molding. And carrying out compression molding according to the conventional prior art.
Step seven: and (6) brazing and compounding. After being dipped with tin, the copper sheet is combined with steel bases with different geometric shapes by brazing, and then the thrust bearing bushes with different specifications are manufactured by mechanical finish machining.
Example 4
The overall technical scheme of the present embodiment is the same as that of embodiments 1 to 3, and is different from the above embodiments in that the molding steps in the fifth and sixth steps are replaced by the existing injection molding step.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A high-performance composite material sliding bearing is characterized by comprising a substrate, a connecting layer and a composite layer;
the substrate is made of a metal material;
the connecting layer comprises a copper mesh-copper sheet composite connecting structure, the copper mesh-copper sheet composite connecting structure comprises a copper sheet interlayer and a copper mesh, the copper mesh is connected with the composite layer formed by the composite material, and the other side of the copper mesh-copper sheet composite connecting structure is fixedly connected with the base body.
2. The high performance composite sliding bearing according to claim 1, wherein the copper mesh-copper sheet composite connection structure is a copper mesh-copper sheet double-sided structure or a copper mesh-copper sheet single-sided structure, the copper mesh-copper sheet single-sided structure is a laminated copper mesh woven on one of both sides of a copper sheet, and the copper mesh-copper sheet double-sided structure is a laminated copper mesh woven on both sides of a copper sheet;
the copper mesh is arranged on two sides of the copper sheet interlayer of the copper mesh-copper sheet bilateral structure, the top end of the upper copper mesh is connected with the composite layer, and the bottom end of the lower copper mesh is connected with the base body in a brazing mode;
the copper mesh is arranged on one side of the copper sheet interlayer of the copper mesh-copper sheet unilateral structure, the top end of the upper copper mesh is connected with the composite layer, and the bottom end of the lower copper sheet is connected with the base body in a brazing mode.
3. The composite sliding bearing according to claim 2, wherein the copper mesh is a laminated copper mesh, that is, a plurality of copper meshes are woven together, the material and mesh number of the adjacent copper meshes are the same or different, and the material, mesh number and layer number of the copper meshes on both sides of the copper sheet are the same or different.
4. The composite high performance sliding bearing according to claim 2, wherein the copper mesh is a tin bronze mesh or a brass mesh, and the copper sheet is a tin bronze sheet or a tin phosphor bronze sheet or a beryllium bronze sheet.
5. The high performance composite plain bearing according to claim 2, wherein the copper mesh has a diameter of 0.1mm to 0.5mm, the mesh size is 20 mesh to 100 mesh, and the copper skin has a thickness of 0.05mm to 0.2 mm.
6. The composite plain bearing according to claim 3, wherein said laminated copper mesh comprises 1 to 4 layers of said copper mesh stacked one on top of the other, and the warp and weft directions of two adjacent layers of said copper mesh are staggered by 0 ° to 90 °.
7. The high performance composite plain bearing according to claim 6, wherein the copper mesh is 3 layers including a 60 mesh tin bronze sheet base layer and a 20 mesh tin bronze sheet and a 60 mesh tin bronze sheet stacked on the tin bronze sheet base layer.
8. A method for producing a high-performance composite sliding bearing according to any one of claims 1 to 7, comprising the steps of:
the method comprises the following steps: the method comprises the following steps of (1) pretreating a copper mesh and a copper sheet, wherein the pretreatment mainly comprises the cutting of the copper mesh and the copper sheet and the surface treatment of the cut copper mesh and the cut copper sheet;
step two: placing the copper mesh with the preset number of layers at a preset position of the copper sheet, placing the whole body in a gas protection chain type sintering furnace, setting the sintering temperature as the diffusion temperature of the copper mesh, and sintering according to a conventional sintering process technology, wherein the sintering temperature is 930-980 ℃, and the rotating speed is 5-15 r/min;
step three: leveling the sintered copper mesh-copper sheet composite connecting structure and then cutting the copper mesh-copper sheet composite connecting structure into a required size;
step four: compounding the high-performance composite material with the copper mesh-copper sheet composite structure according to the existing mould pressing or injection molding process;
step five: after the composite layer is dipped in tin, the composite layer and steel bases with different geometric shapes are combined together by brazing, and then the thrust bearing bushes with different specifications are manufactured by mechanical finish machining.
9. The high-performance composite sliding bearing according to claim 8, wherein in the second step, the bottom of the copper mesh-copper sheet composite connection structure is placed on a graphite plate with a thickness of 20-40 mm, and a graphite plate is placed on the top copper mesh.
10. The high performance composite sliding bearing according to claim 8, wherein the high performance composite comprises powder or plate of modified polytetrafluoroethylene and modified polyaryletherketone.
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