CN102966670A - Composite material bearing and manufacturing method thereof - Google Patents
Composite material bearing and manufacturing method thereof Download PDFInfo
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- CN102966670A CN102966670A CN2012104877988A CN201210487798A CN102966670A CN 102966670 A CN102966670 A CN 102966670A CN 2012104877988 A CN2012104877988 A CN 2012104877988A CN 201210487798 A CN201210487798 A CN 201210487798A CN 102966670 A CN102966670 A CN 102966670A
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Abstract
The invention provides a composite material bearing and a manufacturing method of the composite material bearing. The manufacturing method of the composite material bearing comprises the following steps of: A, processing a steel base body to enable the surface roughness of the steel base body to achieve within Ra 1.6; B, uniformly arranging spherical copper powder on the surface of the steel base body, sintering under reducibility or inert atmosphere, and forming a multi-hole copper powder layer; and C, die pressing polytetrafluoroethylene on the surface of the steel base body on which the multi-hole copper powder layer is formed under the temperature that the polytetrafluoroethylene is in the viscosity flow state, thus forming a polytetrafluoroethylene layer with the thickness being 0.1-1.5mm, and obtaining the composite material bearing. The thickness of the surface of the obtained composite material bearing through the manufacturing method provided by the invention is 0.1-1.5mm, the polytetrafluoroethylene layer has high manufacturing accuracy and uniform elasticity modulus under the premise of guaranteeing binding strength; and the whole performance of the composite material bearing is improved, the manufacturing cost is reduced, and the application field is expanded.
Description
Technical field
The present invention relates to bearing and make the field, in particular to a kind of composite bearing and manufacture method thereof.
Background technique
Teflon-base steel composite material is the 3-layer composite material that is made of steel plate, sintered copper bisque and surperficial polytetrafluoroethylene floor, its processing method is: one or more layers bronze powder of sintering on steel plate at first, form the porous mesosphere, then teflon is layed on the copper powder layer and is rolled, sintering plasticizing forms composite board, again through finish rolling, blanking, roll, shaping, chamfering become the composite bearing goods.
The laying method of polytetrafluoroethylene floor generally divides two kinds of dry method and wet methods.Dry method is teflon resin powder (filling-modified teflon need carry out batch mixing) directly to be layed in carry out compound method on the porous sintered plate.And wet method is to adopt polytetrafluoroethyldispersion dispersion (filling-modified teflon need carry out batch mixing) to use the alcohol breakdown of emulsion, the furnishing starchiness, and then uniform spreading is located on the sintered plate, carries out the laying method of breaking down after the oven dry.
Chinese patent ZL 90106439 discloses a kind of " filling the manufacture method of lead powder soft PTFE ribbon-metallic composite ", the method will be filled lead powder modified Teflon raw meal belt and be covered on the composite sheet of the copper powder-steel plate of sintering, one reinstates mill milling, and then makes composite board through the sintering plasticizing.
The composite board of said method manufacturing, the thinner thickness of its surperficial polytetrafluoroethylplastic plastic layer (generally only is 0.02～0.10mm).
Chinese patent ZL 98114436.5 discloses a kind of " technology for manufacturing elastic metal-plastic thrust bearing ", the method is carried out first compound (compound total thickness is generally 8mm) with polytetrafluoroethylplastic plastic layer and elastic metallic yarn pad, and then combine by soldering from different steel tile base, form four layers of composite material.Wherein the thickness of wire bed course is generally about 4mm, and the thickness of surperficial polytetrafluoroethylene floor is generally 1.5～2.5mm, and all the other are the thickness of wire bed course and the mutual part that embeds of polytetrafluoroethylene floor.
The teflon layer thickness of above-mentioned two kinds of composite materials, or very thin (0.02～0.10mm), or very thick (1.5～2.5mm).If be formed in certain thickness in the middle of this, more than the processing method of two kinds of products all be not suitable for, reason is:
If adopt above-mentioned dry method, wet method or polytetrafluoroethylraw raw material band complex method, because the thermal distortion of polytetrafluoroethylplastic plastic is large, the deformation force of thicker polytetrafluoroethylene floor will surpass the combination force of itself and Porous Cu bisque in the sintering plasticizing process, and the result causes polytetrafluoroethylene floor to come off easily.
If adopt the manufacture method of elastic metal-plastic, the teflon layer thickness is generally 1.5～2.5mm, is subjected to the impact of manufacture method, the controllability extreme difference of precision, and error just reaches 1mm.Although its reason is that the limited location piece carries out spacing when the silk pad of pressed metal, but the wire spreading is manual, density has nonuniformity, the elasticity of each point wire spiral spring also can be variant on the whole area in addition, therefore the springback capacity after the compacting also can be variant, the spreading teflon resin powder will cause the spreading Density inhomogeneity in this case, causes the polytetrafluoroethylene floor thickness deviation that makes large.If make the polytetrafluoroethylene floor than minimal thickness, indivedual positions may have the copper wire exposing surface, and this is unallowed for bearing.
Therefore, in the prior art, owing to can not make the polytetrafluoroethylene floor of above-mentioned intermediate gauge, thereby limited the application area of the rub resistance lost material of this excellence of teflon.
Summary of the invention
The invention provides a kind of composite bearing and manufacture method thereof, be not suitable for making the polytetrafluoroethylene floor of intermediate gauge with the processing method that solves prior art, cause the problem that teflon-base steel composite material bearing application area is restricted.
According to an aspect of the present invention, provide a kind of manufacture method of composite bearing, may further comprise the steps: A, processing steel base reach in the Ra1.6 its surface roughness; B, at the steel base surface uniform spherical copper powder is set, and under reducibility or inert atmosphere, carries out sintering, form the Porous Cu bisque; C, be under the temperature of viscosity flow state at teflon, being formed with the steel base surface mold pressing teflon of Porous Cu bisque, make the polytetrafluoroethylene floor that thickness is 0.1～1.5mm, obtain composite bearing.
Further, step C comprises: the steel base that will be formed with the Porous Cu bisque heats; When the surface temperature of steel base reaches teflon and is in the temperature of viscosity flow state, be that the polytetrafluoroethylsheet sheet of 0.4～1.8mm is placed on the steel base with the thickness of making in advance, polytetrafluoroethylsheet sheet is carried out spacing pressurization, obtain composite bearing.
Further, step C comprises: the steel base that will be formed with the Porous Cu bisque is heated to 400～450 ℃ in oven, and constant temperature was placed on after the taking-up on the lower loose tool of mould more than 0.5 hour; Detect the surface temperature of steel base, when surface temperature is down to 327～380 ℃, place polytetrafluoroethylsheet sheet in steel base, use the upper loose tool of mould that polytetrafluoroethylsheet sheet is carried out spacing pressurization, make polytetrafluoroethylene floor.
Further, the making method of polytetrafluoroethylsheet sheet comprises: compacting: with teflon resin powder or compressing under 30～50MPa through the filling-modified teflon resin powder behind the batch mixing, the thickness of compacting is 0.4～1.8mm; Sintering: compressing material at 360～390 ℃ of lower sintering, is cut out according to the bearing size that wish forms, obtained polytetrafluoroethylsheet sheet.
Further, the material of spherical copper powder is the spherical tin bronze of QSn8-3, and fineness is 20～60 orders.
Further, the sintering atmosphere among the step B is nitrogen and hydrogen mixed gas atmosphere, and the volume ratio of nitrogen and hydrogen is 1:3 in the described mixed atmosphere.
According to another aspect of the present invention, provide a kind of composite bearing, comprised steel base, Porous Cu bisque and polytetrafluoroethylene floor, this composite bearing adopts above-mentioned manufacture method manufacturing to form.
Use composite bearing and the manufacture method thereof of technical solution of the present invention, on the one hand because the Porous Cu bisque that the spherical copper powder sintering forms includes a lot of small up-narrow and down-wide wedge-shaped structures, in the process of subsequently mold pressing teflon, teflon infiltrates the following certain depth in surface of the small wedge-shaped structure of Porous Cu bisque, and it is firmly mechanical chimeric that polytetrafluoroethylene floor and steel tile base are formed; On the other hand owing under the temperature that is in the viscosity flow state at teflon teflon being carried out mold pressing, teflon viscosity when the viscosity flow state is very high, compacting is incorporated into a step and has formed the effect of chemical adhesion under this state, thus the thickness that obtains be the polytetrafluoroethylene floor of 0.1～1.5mm overall tear intensity and binding strength is very high; And, use the polytetrafluoroethylene floor on the composite bearing surface that manufacture method of the present invention obtains to have higher accuracy of manufacturing and more uniform Young's modulus, improve the overall performance of composite bearing, not only reduced cost of production, and expanded application.
Description of drawings
The Figure of description that consists of the application's a part is used to provide a further understanding of the present invention, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.In the accompanying drawings:
Fig. 1 shows the structural representation that is formed with the steel base of Porous Cu bisque according to of the present invention; And
Fig. 2 shows the structural representation that comprises the composite bearing of steel base, Porous Cu bisque and polytetrafluoroethylene floor according to of the present invention.
Embodiment
Below in conjunction with the embodiment of the invention, technological scheme of the present invention is described in detail, but following embodiment understands the present invention, and can not limit the present invention, embodiment and the feature among the embodiment among the present invention can make up mutually, and the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
In a kind of typical mode of execution of the present invention, as depicted in figs. 1 and 2, the manufacture method that comprises the composite bearing of steel base 1, Porous Cu bisque 2 and polytetrafluoroethylene floor 3 may further comprise the steps: A, processing steel base 1 reach in the Ra1.6 its surface roughness; B, at steel base 1 surface uniform spherical copper powder is set, and under inertia or reducing atmosphere, carries out sintering, form Porous Cu bisque 2; C, be under the temperature of viscosity flow state at teflon, at the steel base 1 surperficial mold pressing teflon that is formed with Porous Cu bisque 2, making thickness is the polytetrafluoroethylene floor 3 of 0.1～1.5mm, obtains composite bearing.
The thickness of the composite bearing that the embodiment of the present invention manufacturing obtains is the binding strength height of the polytetrafluoroethylene floor 3 of 0.1～1.5mm, reason is: on the one hand, the porous structure of the Porous Cu bisque 2 that is formed by the spherical copper powder sintering includes a lot of small up-narrow and down-wide wedge-shaped structures that fall, as shown in Figure 1, in the process of subsequently mold pressing teflon, teflon infiltrates the following certain depth in surface of the small wedge-shaped structure of Porous Cu bisque 2, it is firmly mechanical chimeric that polytetrafluoroethylene floor 3 and steel tile base 1 are formed, as shown in Figure 2; On the other hand, be at teflon under the temperature of viscosity flow state teflon is carried out mold pressing, because teflon is in the viscosity flow state, viscosity is very high, compacting is not in conjunction with being simple mechanical chimeric under this state, also comprise the effect of chemical adhesion, thereby overall tear intensity and binding strength is very high.
The thickness of the composite bearing that the embodiment of the present invention manufacturing obtains is the surface thickness uniformity of the polytetrafluoroethylene floor 3 of 0.1～1.5mm, can reach higher accuracy of manufacturing, thereby have more uniformly Young's modulus, improved the overall performance of composite bearing.
In addition, the thickness of the polytetrafluoroethylene floor 3 of the composite bearing that the embodiment of the present invention manufacturing obtains is 0.1～1.5mm, the teflon layer thickness (0.02～0.10mm) that this thickness obtains greater than dry method, wet method or the manufacturing of polytetrafluoroethylraw raw material band complex method of prior art, again less than the teflon bed thickness (1.5～2.5mm) of the elastic metal-plastics bearing of prior art, under the prerequisite of the binding strength that guarantees composite bearing, not only reduce cost of production, and expanded the application of composite bearing.
In the preferred embodiment of the present invention, step C comprises: the steel base that will be formed with the Porous Cu bisque heats; When the surface temperature of steel base reaches teflon and is in the temperature of viscosity flow state, be that the polytetrafluoroethylsheet sheet of 0.4～1.8mm is placed on the steel base with the thickness of making in advance, polytetrafluoroethylsheet sheet is carried out spacing pressurization, obtain composite bearing.In advance teflon is made into the polytetrafluoroethylsheet sheet that thickness is 0.4～1.8mm, and then polytetrafluoroethylsheet sheet carried out spacing pressurization on steel base 1 surface, the polytetrafluoroethylsheet sheet volume is compressed, and some teflon infiltrates the Porous Cu bisque 2 on steel base 1 surface, and obtaining thickness is the polytetrafluoroethylene floor 3 of 0.1～1.5mm.Adopt this mode to make polytetrafluoroethylene floor 3, can guarantee that polytetrafluoroethylene floor 3 has uniform Young's modulus and higher accuracy of manufacturing.
In the preferred embodiment of the present invention, step C comprises: the steel base 1 that will be formed with Porous Cu bisque 2 is heated to 400～450 ℃ in oven, and constant temperature was placed on after the taking-up on the lower loose tool of mould more than 0.5 hour; Detect the surface temperature of steel base 1, when surface temperature is down to 327～380 ℃, place polytetrafluoroethylsheet sheet in steel base 1, use the upper loose tool of mould that polytetrafluoroethylsheet sheet is carried out spacing pressurization, make polytetrafluoroethylene floor 3.Adopt the steel base 1 that will be formed with first Porous Cu bisque 2 in oven, to be heated to 400～450 ℃ of higher temperature and the heat treatment step of constant temperature more than 0.5 hour, in the time of can guaranteeing to use loose tool under being in 327～380 ℃ of temperature of viscosity flow state, to carry out spacing pressurization with the lower fetal membrane pair polytetrafluoroethylsheet sheet that contacts with steel base 1, steel base 1 itself has enough heats can pass to teflon, teflon is reached in mold process and keep the viscosity flow state, thereby make polytetrafluoroethylene floor 3 and the Porous Cu bisque 2 on steel base 1 surface form firmly chemical adhesion on the chimeric basis of machinery.
In the preferred embodiment of the present invention, the making method of polytetrafluoroethylsheet sheet comprises: compacting: with teflon resin powder or compressing under 30～50MPa through the filling-modified teflon resin powder behind the batch mixing, the thickness of compacting is 0.4～1.8mm; Sintering: compressing material at 360～390 ℃ of lower sintering, is cut out according to the bearing size that wish forms, obtained polytetrafluoroethylsheet sheet.Consistent by the polytetrafluoroethylsheet sheet even thickness that said method obtains, have uniform Young's modulus and higher accuracy of manufacturing, the steel base 1 surperficial mold pressing that can directly be formed with Porous Cu bisque 2, mold pressing rear section teflon infiltrates in the small wedge-shaped structure of Porous Cu bisque 2, form the chimeric and chemical adhesion effect of machinery, thereby make the polytetrafluoroethylene floor 3 that thickness is 0.1～1.5mm.
In the concrete mode of execution of the present invention, teflon resin powder can be through filling-modified teflon resin powder, for example proportioning is that polyphenyl fat 20～30wt%, aramid fibre 1～4wt%, teflon are the filling-modified teflon resin powder of surplus, perhaps proportioning is the filling-modified teflon resin powder of polyphenyl fat 20～30wt%, teflon 70～80wt%, in this case, before carrying out above-mentioned pressing step, also comprise the step of batch mixing.
In the preferred embodiment of the present invention, the material of spherical copper powder is the spherical tin bronze of QSn8-3, and fineness is 20～60 orders.The spherical tin bronze of QSn8-3 has larger rigidity, not yielding behind the sintering yet, can include a lot of up-narrow and down-wide small obcuneate porous structures in steel base 1 surface formation, thereby after mold pressing, form good mechanical chimeric and chemical adhesion with polytetrafluoroethylene floor 3.Certainly, in other concrete mode of execution, also can adopt the spherical copper powder of other material to come sintering to form the spherical copper powder layer, as long as used spherical copper powder has enough rigidity, so that not yielding behind the sintering, can include a lot of up-narrow and down-wide small obcuneate porous structures in steel base 1 surface formation and get final product.
In the preferred embodiment of the present invention, the atmosphere of sintering formation Porous Cu bisque 2 is nitrogen and hydrogen mixed gas atmosphere among the step B, and wherein, the volume ratio of nitrogen and hydrogen is 1:3.Adopt this sintering atmosphere, can in sintering process, protect preferably spherical copper powder that oxidation or other chemical reactions do not occur, guarantee the formation of porous structure, and this atmosphere can directly be passed through NH
3Thermolysis obtains, and cost is lower.
In a kind of typical mode of execution of the present invention, composite bearing comprises steel base 1, Porous Cu bisque 2 and polytetrafluoroethylene floor 3, this composite bearing adopts above-mentioned manufacture method manufacturing to form, polytetrafluoroethylene floor with 0.1～1.5mm, under the prerequisite that guarantees binding strength, not only reduce cost of production, and expanded the application of composite bearing.
Further specify beneficial effect of the present invention below in conjunction with embodiment.
By grinding, its surface roughness is reached in the Ra1.6 on planar steel base surface; Steel base is carried out surface degreasing, processing of rust removing; the spherical tin bronze powder of even spreading one deck 20～60 purpose QSn8-3; then be placed in the high temperature sintering furnace that is connected with nitrogen that volume ratio is 1:3 and hydrogen hybrid protection gas and carry out sintering, obtain the Porous Cu bisque.
Teflon resin powder is compressing under 50MPa, and the thickness of compacting is 0.4mm; At 375 ℃ of lower sintering, constant temperature 1 hour, and cut out by length and the width of the requirement of design bearing pattern makes polytetrafluoroethylsheet sheet with compressing material.
The steel base that will be formed with above-mentioned Porous Cu bisque is heated to 400 ℃ in oven, constant temperature 1 hour, be placed on after the taking-up on the flat board (lower loose tool) of the worktable of press machine, when detecting its surface temperature and being down in 327 ℃～380 ℃ scopes, above-mentioned polytetrafluoroethylsheet sheet is placed on it, press machine is descending by loose tool compacting on the planar, limiting stopper is set in the pressing process, when the teflon layer thickness reaches 0.1～0.2mm, pressurize 1 minute, with the prune redundance of polytetrafluoroethylene floor of scissors, through further grinding, be processed into the finished product of composite bearing according to the requirement of design bearing pattern.
By grinding, its surface roughness is reached in the Ra1.6 on semicircle tubular steel base surface; Steel base is carried out surface degreasing, processing of rust removing; the spherical tin bronze powder of even spreading one deck 20～60 purpose QSn8-3; then be placed in the high temperature sintering furnace that is connected with nitrogen that volume ratio is 1:3 and hydrogen hybrid protection gas and carry out sintering, obtain the Porous Cu bisque.
The polyphenyl fat of 20wt%, the teflon of 80wt% are carried out batch mixing, make filling-modified teflon resin powder; Filling-modified teflon resin powder is compressing under 50MPa, and the thickness of compacting is 1.8mm; At 390 ℃ of lower sintering, constant temperature 1 hour, and cut out by length and the width of the requirement of design bearing pattern makes polytetrafluoroethylsheet sheet with compressing material.
The steel base that will be formed with above-mentioned Porous Cu bisque is heated to 450 ℃ in oven, constant temperature 1 hour, be placed on after the taking-up on the die (lower loose tool) of the worktable of press machine, when detecting its surface temperature and being down in 327 ℃～380 ℃ scopes, above-mentioned polytetrafluoroethylsheet sheet is placed on it, press machine is descending by punch (upper loose tool) compacting, limiting stopper is set in the pressing process, when the teflon layer thickness reaches 1.4～1.5mm, pressurize 1 minute, with the prune redundance of polytetrafluoroethylene floor of scissors, through further grinding, be processed into the finished product of composite bearing according to the requirement of design bearing pattern.
By grinding, its surface roughness is reached in the Ra1.6 1/3rd cylinder-shaped steel matrix surfaces; Steel base is carried out surface degreasing, processing of rust removing, and evenly then the spherical tin bronze powder of spreading one deck 20～60 purpose QSn10-10 is placed on to be connected with in the high temperature sintering furnace that purity is the hydrogen more than 99.9% and carries out sintering, obtains the Porous Cu bisque.
The polyphenyl fat of 30wt%, the aramid fibre of 1wt%, the teflon of 69wt% are carried out batch mixing, make filling-modified teflon resin powder; Filling-modified teflon resin powder is compressing under 30MPa, and the thickness of compacting is 1.5mm; At 360 ℃ of lower sintering, constant temperature 1 hour, and cut out by length and the width of the requirement of design bearing pattern makes polytetrafluoroethylsheet sheet with compressing material.
The steel base that will be formed with above-mentioned Porous Cu bisque is heated to 420 ℃ in oven, constant temperature 0.5 hour, be placed on after the taking-up on the die (lower loose tool) of the worktable of press machine, when detecting its surface temperature and being down in 327 ℃～380 ℃ scopes, above-mentioned polytetrafluoroethylsheet sheet is placed on it, press machine is descending by punch (upper loose tool) compacting, limiting stopper is set in the pressing process, when the teflon layer thickness reaches 1.2～1.3mm, pressurize 1 minute, with the prune redundance of polytetrafluoroethylene floor of scissors, through further grinding, be processed into the finished product of composite bearing according to the requirement of design bearing pattern.
Comparative Examples 1
Adopt Chinese patent ZL 90106439 disclosed " filling the manufacture method of lead powder soft PTFE ribbon-metallic composite " to make and obtain composite board, the thickness of its surperficial polytetrafluoroethylene floor is 0.10mm.
Comparative Examples 2
Adopt Chinese patent ZL 98114436.5 disclosed " technology for manufacturing elastic metal-plastic thrust bearing " to make and obtain the metallo-plastic composite bearing, the thickness of its surperficial polytetrafluoroethylene floor is 2.5mm.
Table 1
| ? | Friction factor | The polishing scratch width | Peeling strength | The surface thickness uniformity | The Young's |
| Embodiment | |||||
| 1 | 0.08～0.18 | ≤6.0mm | ≥400N/cm | 0.15～0.20mm | 8.0～8.3 |
| Embodiment | |||||
| 2 | 0.12～015 | ≤30mm | ≥400N/cm | 1.40～1.45mm | 2.4～2.7 |
| Embodiment | |||||
| 3 | 0.07～0.10 | ≤3.3mm | ≥400N/cm | 1.25～1.30mm | 3.2～3.5GPa |
| Comparative Examples 1 | 0.08～0.18 | ≤60mm | ≥30N/cm | 0.02～0.10mm | 8.8～9.1GPa |
| Comparative Examples 2 | 0.07～0.10 | ≤3.0mm | ≥1000N/cm | 1.50～2.50mm | 1.9～2.4GPa |
From the test result of table 1 as seen, the embodiment of the invention 1～3 is made the composite bearing that obtains, making the composite bearing or the sheet material that obtain with Comparative Examples 1～2 compares, binding strength than Comparative Examples 1 polytetrafluoroethylene floor is larger, better than Comparative Examples 1,2 surface uniformity and Young's modulus uniformity, and also kept low friction, higher abrasion resistance properties simultaneously.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. the manufacture method of a composite bearing is characterized in that, may further comprise the steps:
A, processing steel base (1) reach in the Ra1.6 its surface roughness;
B, at described steel base (1) surface uniform spherical copper powder is set, and under reducibility or inert atmosphere, carries out sintering, form Porous Cu bisque (2);
C, be under the temperature of viscosity flow state at teflon, being formed with the surperficial mold pressing teflon of steel base (1) of described Porous Cu bisque (2), make the polytetrafluoroethylene floor that thickness is 0.1～1.5mm (3), obtain described composite bearing.
2. preparation method according to claim 1 is characterized in that, described step C comprises:
The steel base (1) that will be formed with described Porous Cu bisque (2) heats;
When the surface temperature of described steel base (1) reaches teflon and is in the temperature of viscosity flow state, be that the polytetrafluoroethylsheet sheet of 0.4～1.8mm is placed on the described steel base (1) with the thickness of making in advance, described polytetrafluoroethylsheet sheet is carried out spacing pressurization, obtain described composite bearing.
3. manufacture method according to claim 2 is characterized in that, described step C comprises:
The steel base (1) that will be formed with described Porous Cu bisque (2) is heated to 400～450 ℃ in oven, constant temperature was placed on after the taking-up on the lower loose tool of mould more than 0.5 hour;
Detect the surface temperature of described steel base (1), when described surface temperature is down to 327～380 ℃, place described polytetrafluoroethylsheet sheet in described steel base (1), use the upper loose tool of described mould that described polytetrafluoroethylsheet sheet is carried out spacing pressurization, make described polytetrafluoroethylene floor (3).
4. according to claim 2 or 3 described manufacture methodes, it is characterized in that the making method of described polytetrafluoroethylsheet sheet comprises:
Compacting: with teflon resin powder or compressing under 30～50MPa through the filling-modified teflon resin powder behind the batch mixing, the thickness of compacting is 0.4～1.8mm;
Sintering: described compressing material at 360～390 ℃ of lower sintering, is cut out according to the bearing size that wish forms, obtained described polytetrafluoroethylsheet sheet.
5. manufacture method according to claim 1 is characterized in that, the material of described spherical copper powder is the spherical tin bronze of QSn8-3, and fineness is 20～60 orders.
6. manufacture method according to claim 1 is characterized in that, the sintering atmosphere among the described step B is nitrogen and hydrogen mixed gas atmosphere, and the volume ratio of nitrogen and hydrogen is 1:3 in the described mixed atmosphere.
7. a composite bearing comprises steel base (1), Porous Cu bisque (2) and polytetrafluoroethylene floor (3), it is characterized in that, each described manufacture method manufacturing forms in the employing claim 1 to 6.
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Cited By (3)
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| CN104061242A (en) * | 2014-05-18 | 2014-09-24 | 金迪荣 | Multi-layered composite wear resistant balancing bearing and manufacturing technique 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 |
| CN114043741A (en) * | 2021-11-17 | 2022-02-15 | 江苏立一新材料科技有限公司 | Processing method of composite material for sliding bearing |
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| CN104061242A (en) * | 2014-05-18 | 2014-09-24 | 金迪荣 | Multi-layered composite wear resistant balancing bearing and manufacturing technique 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 |
| CN105020267B (en) * | 2015-08-10 | 2017-09-19 | 大连三环复合材料技术开发股份有限公司 | Core main pump water lubrication composite material thrust bearing |
| CN114043741A (en) * | 2021-11-17 | 2022-02-15 | 江苏立一新材料科技有限公司 | Processing method of composite material for sliding bearing |
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Address after: Thirty Lingang Industrial Zone, 116200 Li Pu new district, Liaoning, Dalian Patentee after: Dalian Sanhuan Composite Material Technology Development Co., Ltd. Address before: Thirty Lingang Industrial Zone, 116200 Li Pu new district, Liaoning, Dalian Patentee before: Dalian Sanhuan Composite Material Technology Development Co., Ltd. |