CN111941712A - Method for manufacturing polyether-ether-ketone high-performance sliding bearing - Google Patents
Method for manufacturing polyether-ether-ketone high-performance sliding bearing Download PDFInfo
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- CN111941712A CN111941712A CN202010677914.7A CN202010677914A CN111941712A CN 111941712 A CN111941712 A CN 111941712A CN 202010677914 A CN202010677914 A CN 202010677914A CN 111941712 A CN111941712 A CN 111941712A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
- B29C43/18—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/04—Bearings
- B29L2031/045—Bushes therefor
Abstract
The invention discloses a manufacturing method of a polyetheretherketone high-performance sliding bearing, which relates to the field of composite sliding bearing manufacturing, and the manufacturing method comprises the following steps: firstly, a regular convex-concave surface is formed on the upper surface of a steel matrix, then a multi-layer stainless steel wire mesh is processed according to the structure of the convex-concave surface, and then the multi-layer stainless steel wire mesh is welded on the working surface of the steel matrix in a four-point continuous spot welding manner so as to be combined with the steel matrix; and then the modified polyether-ether-ketone powder is combined with the steel matrix into a whole through a thermoplastic mould pressing processing technology, so that the novel polyether-ether-ketone sliding bearing can be prepared. Compared with the prior art, the bearing has the advantages that the structure is simpler, the processing technology of physical connection is safer and more reliable, unnecessary mechanical processing processes are reduced, the quality of products is improved, and the use safety of the bearing is greatly improved.
Description
Technical Field
The invention relates to a manufacturing method of an organic polymer sliding bearing, in particular to a polyether-ether-ketone polymer composite bearing which is high-temperature resistant, wear resistant, high in PV value and good in water lubrication property and a manufacturing method thereof.
Background
Polyether-ether-ketone (PEEK) is used as a high polymer material, has outstanding high-temperature resistance, can work for a long time at 280 ℃, has good dimensional stability and rigidity, is insoluble in any acid-base solvent, has strong corrosion resistance, has particularly high affinity to water, has incomparable superiority to other lubricating materials under the condition of water lubrication, and has the advantages of friction coefficient, bearing capacity and abrasion resistance which are improved by times. The polyether-ether-ketone composite bearing becomes a manufacturing marker post of a high-performance self-lubricating bearing.
At present, there are basically two manufacturing methods for the peek sliding bearing: firstly, the whole bearing is completely made of the PEEK material through a compression plasticizing process, the process is high in material cost and limited by a processing process, compression molding of medium-sized and large-sized bearings and special-shaped bearings is difficult to complete, and in addition, the rigidity of the bearing cannot meet the use requirement. Secondly, the bearing has the characteristics of a polyetheretherketone material, and the bearing body is made of a metal material, so that the rigidity and the machinability of the bearing are greatly improved. The existing process is to make two materials form physical connection, and is characterized in that the surface roughness of a substrate is increased, convex and concave surfaces (dovetail groove type, deep holes with different depths and shapes) with different shapes are processed on the substrate, and then the two materials are connected into a whole by utilizing the specific adhesiveness of molten polyether-ether-ketone. The production process also has the following defects: the shape of the large-scale bearing is complex, the process holes for processing and combining the composite surfaces of the base bodies are difficult to process and uneven in distribution, and after the large-scale bearing is combined with the molten polyether-ether-ketone, the large-scale bearing is easily affected by stress generated by a later-stage polyether-ether-ketone material, so that the edge of the bearing is easily tilted and even the surface of the bearing is cracked, and great hidden danger is generated on the use of the bearing.
Disclosure of Invention
The invention aims to provide a brand-new sliding bearing with high temperature resistance, low friction coefficient, high wear resistance and high PV value and a manufacturing method thereof, so as to overcome the defects in the prior art.
In order to realize the purpose, the technical scheme is as follows:
the manufacturing method of the polyetheretherketone high-performance sliding bearing comprises the following steps: firstly, processing a regular convex-concave surface on the upper surface of a steel matrix, and then welding a plurality of layers of stainless steel wire meshes on the upper surface of the steel matrix in a spot welding manner to combine the stainless steel wire meshes with the steel matrix; and then the modified polyether-ether-ketone powder is combined with the steel matrix into a whole through a thermoplastic mould pressing processing technology.
In a further improvement, the polyether-ether-ketone plastic layer is processed by modified polyether-ether-ketone powder and is combined with the steel matrix through a steel wire mesh and a convex-concave surface, and the thickness of the polyether-ether-ketone plastic layer is 3-10 mm.
In a further improvement, the upper surface of the steel substrate is made into various convex-concave surfaces which are regularly distributed by processing methods of sand blasting, etching, turning, milling and polishing, and the convex-concave depth is 0.5-1 mm.
In a further improvement, the multi-layer stainless steel wire mesh is processed according to the shape of the steel matrix and then is regularly and firmly welded with the upper surface of the steel matrix into a whole, and the diameter of the stainless steel wire is set to be 1.5-5 mm.
In a further improvement, the grid area of the stainless steel wire mesh is not more than 3% of the working surface area of the bearing; the periphery of the steel matrix and the steel wire mesh are firmly welded into a whole, and the intersection points of all the grids in the middle are orderly welded by a four-square continuous welding method, so that the welding points are ensured to be uniform and consistent, and the welding points are not higher than the height of the steel wire mesh.
In a further improvement, the thermoplastic molding process comprises the following steps:
(1) the thermoplastic mold is processed according to the geometric shape of the bearing, is divided into a convex-concave mold and is provided with an exhaust hole;
(2) putting the steel substrate into a female die, and uniformly spraying a release agent on the inner wall of the female die;
(3) putting the modified polyether-ether-ketone powder into a vacuum drying oven at 150 ℃ for drying treatment for 6-12 h, then putting the modified polyether-ether-ketone powder into the female die according to the designed weight, strickling the modified polyether-ether-ketone powder, and putting the modified polyether-ether-ketone powder into the male die;
(4) putting the combined thermoplastic mold and bearing blank into a press machine for pressing, molding for three times with the final pressure of 60MPa, pressing for 20 MPa each time, and lifting the press machine for buffering and exhausting;
(5) putting the thermoplastic mould and the bearing into a heating furnace to be heated, wherein the melting temperature is 380-400 ℃, and continuously heating until the polyether-ether-ketone powder is completely melted;
(6) taking out the thermoplastic mold from the heating furnace, putting the thermoplastic mold into a press machine for slow pressurization, increasing the pressure along with gradual plasticization of the molten powder, keeping the pressure at 65-75 MPa for 30min, and then opening the mold along with air cooling to 80-100 ℃ to take out the bearing;
(7) and taking out the bearing, putting the bearing into the heating furnace again, keeping the temperature of the heating furnace at 270 ℃ for 2-3 hours, and processing the annealed bearing to meet the required geometric dimension of each part.
In a further improvement, the polyether-ether-ketone high-performance sliding bearing is mainly suitable for thrust bearings and guide bearings of water turbines and steam turbine generator sets, and sliding bearings in the fields of military industry and nuclear power.
Compared with the prior art, the invention has the beneficial effects that: the manufacturing method of the traditional organic polymer composite sliding bearing is completely changed, the combination mode of the polyether-ether-ketone plastic layer and the steel matrix is simpler and easier to operate, a safer and more reliable physical connection processing technology is adopted, unnecessary machining processes are greatly reduced, and the use safety of the bearing is ensured. In addition, the invention can meet the processing technical requirements of the composite sliding bearing under different working conditions in a plurality of fields.
Drawings
FIG. 1 is a front view of a bearing machined in accordance with the present invention;
FIG. 2 is a side view of a bearing machined in accordance with the present invention;
FIG. 3 is a schematic structural view of a steel substrate according to the present invention;
FIG. 4 is a schematic structural view of a steel wire mesh of the present invention;
fig. 5 is a schematic diagram illustrating a welding manner of the steel wire mesh according to the embodiment of the present invention.
In the figure: 1. a steel substrate; 2. a polyether-ether-ketone plastic layer; 3. a steel wire mesh transition layer.
Detailed Description
The invention will be further explained and illustrated with reference to the figures and examples.
Example (b): referring to fig. 1 and 2, a method for manufacturing a peek high performance sliding bearing includes the following steps: firstly, processing a regular convex-concave surface on the upper surface of a steel substrate 1, welding a plurality of layers of stainless steel wire meshes on the working surface of the steel substrate 1 in a spot welding manner, and combining the stainless steel wire meshes with the steel substrate 1; and then the modified polyether-ether-ketone powder is combined with the steel matrix 1 into a whole through a thermoplastic mould pressing processing technology.
As shown in fig. 3, the upper surface of the steel substrate 1 is made into various convex and concave surfaces with regular distribution by processing methods of sand blasting, etching, turning, milling and polishing, and the convex-concave depth is 1 mm.
As shown in fig. 4 and 5, after being processed according to the shape of the steel substrate, the multi-layer stainless steel wire mesh is firmly welded with the upper surface of the steel substrate 1 into a whole in a spot welding manner regularly, the grid area of the wire mesh is not more than 3% of the working surface area of the bearing, and the diameter of the steel wire is determined to be between 4 mm.
As shown in fig. 1 and 2, the polyetheretherketone plastic layer 2 is made of modified polyetheretherketone powder, and is combined with the steel substrate 1 through a steel wire mesh and a concave-convex surface, and the thickness of the polyetheretherketone plastic layer 2 is 7 mm.
The thermoplastic mould pressing forming process comprises the following steps:
(1) the thermoplastic mold is processed according to the geometric shape of the bearing, is divided into a convex-concave mold and is provided with an exhaust hole;
(2) putting the steel substrate into a female die, and uniformly spraying a release agent on the inner wall of the female die;
(3) putting the modified polyether-ether-ketone powder into a vacuum drying oven at 150 ℃ for drying treatment for 10 hours, then putting the modified polyether-ether-ketone powder into the female die according to the designed weight, strickling the modified polyether-ether-ketone powder, and putting the modified polyether-ether-ketone powder into the male die;
(4) putting the combined thermoplastic mold and bearing blank into a press machine for pressing, molding for three times with the final pressure of 60MPa, pressing for 20 MPa each time, and lifting the press machine for buffering and exhausting;
(5) putting the thermoplastic mould and the bearing into a heating furnace to be heated, wherein the melting temperature is 380-400 ℃, and continuously heating until the polyether-ether-ketone powder is completely melted;
(6) taking out the thermoplastic mold from the heating furnace, putting the thermoplastic mold into a press machine, slowly pressurizing, increasing the pressure along with gradual plasticization of the molten powder, keeping the pressure at 70MPa for 30min, and then cooling to 80-100 ℃ along with air cooling, opening the mold and taking out a bearing;
(7) and taking out the bearing, putting the bearing into the heating furnace again, keeping the temperature of the heating furnace at 270 ℃ for 3 hours, and processing the annealed bearing to meet the required geometric dimension of each part.
Claims (6)
1. The manufacturing method of the polyetheretherketone high-performance sliding bearing is characterized by comprising the following steps: firstly, processing a regular convex-concave surface on the upper surface of a steel matrix, welding a plurality of layers of stainless steel wire meshes on the upper surface of the steel matrix in a spot welding manner, and combining the stainless steel wire meshes with the steel matrix; finally, the modified polyether-ether-ketone powder is combined with the steel matrix into a whole through a thermoplastic mould pressing processing technology.
2. The method of manufacturing a polyetheretherketone high performance sliding bearing according to claim 1, characterized in that: the processing method of the convex-concave surface is characterized in that various convex-concave surfaces which are regularly distributed are manufactured by the processing method of sand blasting, etching, turning, milling and polishing, and the convex-concave depth of the processed convex-concave surfaces is 0.5-1 mm.
3. The method for manufacturing a polyetheretherketone high performance sliding bearing according to claim 1, wherein: the welding step of the stainless steel wire mesh is specifically that after the multiple layers of stainless steel wire meshes are processed according to the shape of the steel matrix, the upper surface of the steel matrix is regularly and firmly welded into a whole in a spot welding mode.
4. The method of manufacturing a polyetheretherketone high performance sliding bearing according to claim 1, characterized in that: all grid end points of the steel wire mesh and the steel substrate are welded together by adopting a four-side continuous welding method combining four sides and the middle, and each welding point is ensured not to be higher than the height of the steel wire mesh.
5. The method for manufacturing a polyetheretherketone high performance sliding bearing according to claim 1, wherein,
the thermoplastic mould pressing forming process comprises the following steps:
(1) the thermoplastic mold is processed according to the geometric shape of the bearing, is divided into a convex-concave mold and is provided with an exhaust hole;
(2) putting the steel substrate into a female die, and uniformly spraying a release agent on the inner wall of the female die;
(3) putting the modified polyether-ether-ketone powder into a vacuum drying oven at 150 ℃ for drying treatment for 6-12 h, then putting the modified polyether-ether-ketone powder into the female die according to the designed weight, strickling the modified polyether-ether-ketone powder, and putting the modified polyether-ether-ketone powder into the male die;
(4) putting the combined thermoplastic mold and bearing blank into a press machine for pressing, molding for three times with the final pressure of 60MPa, pressing for 20 MPa each time, and lifting the press machine for buffering and exhausting;
(5) putting the thermoplastic mould and the bearing into a heating furnace to be heated, wherein the melting temperature is 380-400 ℃, and continuously heating until the polyether-ether-ketone powder is completely melted;
(6) taking out the thermoplastic mold from the heating furnace, putting the thermoplastic mold into a press machine for slow pressurization, increasing the pressure along with the gradual plasticizing process of the molten powder, keeping the pressure at 65-75 MPa for 30min, and then opening the mold along with the cooling of air to 80-100 ℃ to take out the bearing;
(7) and taking out the bearing, putting the bearing into the heating furnace again, keeping the temperature of the heating furnace at 270 ℃ for 2-3 hours, and processing the annealed bearing to meet the required geometric dimension of each part.
6. The use of the method of manufacturing a polyetheretherketone high performance plain bearing according to claim 1 in thrust and guide bearings for water turbine and steam turbine generator sets, and in plain bearings for nuclear power applications.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010677914.7A CN111941712A (en) | 2020-07-15 | 2020-07-15 | Method for manufacturing polyether-ether-ketone high-performance sliding bearing |
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| CN202010677914.7A CN111941712A (en) | 2020-07-15 | 2020-07-15 | Method for manufacturing polyether-ether-ketone high-performance sliding bearing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114658763A (en) * | 2022-03-04 | 2022-06-24 | 大连三环复合材料技术开发股份有限公司 | Composite material sliding bearing |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102602080A (en) * | 2012-03-13 | 2012-07-25 | 大连路阳科技开发有限公司 | Steel-base polyether-ether-ketone composite plate and manufacturing method thereof |
| CN105020267A (en) * | 2015-08-10 | 2015-11-04 | 大连三环复合材料技术开发有限公司 | Water lubrication composite thrust bearing of nuclear main pump |
| CN107504068A (en) * | 2016-06-14 | 2017-12-22 | 伦克股份有限公司 | Sliding bearing and the method for producing it |
| CN109027006A (en) * | 2018-08-06 | 2018-12-18 | 长沙理工大学 | A kind of composite sliding bearing and preparation method thereof |
-
2020
- 2020-07-15 CN CN202010677914.7A patent/CN111941712A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102602080A (en) * | 2012-03-13 | 2012-07-25 | 大连路阳科技开发有限公司 | Steel-base polyether-ether-ketone composite plate and manufacturing method thereof |
| CN105020267A (en) * | 2015-08-10 | 2015-11-04 | 大连三环复合材料技术开发有限公司 | Water lubrication composite thrust bearing of nuclear main pump |
| CN107504068A (en) * | 2016-06-14 | 2017-12-22 | 伦克股份有限公司 | Sliding bearing and the method for producing it |
| CN109027006A (en) * | 2018-08-06 | 2018-12-18 | 长沙理工大学 | A kind of composite sliding bearing and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114658763A (en) * | 2022-03-04 | 2022-06-24 | 大连三环复合材料技术开发股份有限公司 | Composite material sliding bearing |
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