Highly wear-resistant oilless bearing and forming process thereof

Abstract

The invention discloses a high-wear-resistance oilless bearing and a forming process thereof. The bearing comprises an inner sleeve, a limiting ring, a first outer sleeve, a solid lubricating column, a piston, a spring, a heat conduction layer, a third through hole, a heat conduction ring, a connecting pipe, a heat dissipation pipe, heat dissipation fins, a fourth through hole, a fixing sleeve, a fixing plate, heat dissipation holes and heat conduction holes. The process comprises the following steps: 1, preparing raw materials; step 2, processing a blank; step 3, drying and curing; step 4, finish machining and inspection; step 5, assembling and forming; and step 6, packaging and warehousing. By adding strengthening elements Si, Mn, Ni and Fe, the forming range of a beta-phase region with higher hardness in the alloy is obviously expanded, and by adding Cr and rare earth elements, the matrix structure is refined, coarse crystallization is limited, and the gas content is reduced, so that the wear resistance of the material is enhanced while the structural compactness and stability of the material are improved, and the service life of the material is prolonged. And the application range and the reliability of the oilless bearing are improved.

Description

Technical Field

[0001] The invention relates to the technical field of oil-free bearings, in particular to a highly wear-resistant oil-free bearing and a molding process thereof. Background Art

[0002] Oil-free bearings, also known as self-lubricating bearings or oil-free bearings, are a new type of lubricated bearings that combine the characteristics of metal bearings and oil-free lubricated bearings. The load is mainly borne by the metal matrix, while the specially formulated solid lubricating material is responsible for lubrication. This type of bearing has many significant characteristics and application advantages. It has a high load-bearing capacity. Oil-free bearings can withstand higher loads and are suitable for heavy-load environments. Even in impact or high-temperature environments, oil-free bearings can maintain stable performance. The solid lubricating material inside can form a lubricating film during friction, achieve self-lubrication, and reduce friction and wear. Oil-free bearings are particularly suitable for occasions where it is difficult to lubricate and form an oil film, such as low-speed, reciprocating or swinging motion states. Oil-free bearings are not afraid of water flushing and other acid erosion and erosion, and are suitable for a variety of harsh environments.

[0003] Existing oil-free bearings have the following defects: First, the inherent wear resistance of oil-free bearings made of traditional brass is slightly insufficient in extreme or complex working environments, and it is difficult to meet the high-performance requirements under specific conditions, which greatly limits the scope of application and reliability of such bearings; Second, the design of oil-free bearings relies on the solid lubricating materials in the holes of the outer sleeve to build a lubricating film on the friction interface to significantly reduce friction loss and extend service life. However, these lubricating materials lack a mechanism to actively migrate to the friction surface during actual operation, resulting in the inability to maintain a continuous and uniform lubrication effect, affecting the overall performance and stability of the bearing; Third, under high-speed rotation conditions, a large amount of heat energy is easily accumulated inside the oil-free bearing. If this heat cannot be effectively dissipated, it will directly lead to an increase in bearing temperature, accelerate material aging and wear, and thus shorten the service life of the bearing, and may even cause more serious safety hazards, such as thermal failure or mechanical failure. Summary of the invention

[0004] The object of the present invention is to provide a highly wear-resistant oil-free bearing and a molding process thereof, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a highly wear-resistant oil-free bearing, comprising a first outer sleeve, a first through hole is formed on the outer wall of the first outer sleeve, a solid lubricating column is arranged in the first through hole, a piston is arranged on one side of the solid lubricating column, and the piston is sleeved in the first through hole, a heat-conducting layer is fixedly connected to the outer wall of the first outer sleeve, a second through hole is formed on the outer wall of the heat-conducting layer at a position corresponding to the first through hole, a second outer sleeve is fixedly connected to the outer wall of the heat-conducting layer, a receiving groove is formed on the inner wall of the second outer sleeve at a position corresponding to the second through hole, a spring is arranged in the receiving groove, and the other end of the spring is arranged on the piston.

[0006] As a further technical solution of the present invention, a heat-conducting ring is arranged in the second outer sleeve, a connecting tube is arranged on the heat-conducting ring, a heat dissipation pipe is fixedly connected to the other end of the connecting tube, a heat sink is arranged on one side of the connecting tube, a fourth through hole is opened on the heat sink, and the heat dissipation pipe is fixedly connected in the fourth through hole.

[0007] As a further technical solution of the present invention, a limiting groove is provided on the inner wall of the first outer sleeve, an inner sleeve is sleeved inside the first outer sleeve, a limiting ring is provided on the outer wall of the inner sleeve at the position corresponding to the limiting groove, and the limiting ring is sleeved in the limiting groove.

[0008] As a further technical solution of the present invention, sealing plates are provided on both sides of the first outer sleeve, first positioning grooves are opened on the outer walls on both sides of the first outer sleeve, second positioning grooves are opened on the outer walls on both sides of the inner sleeve, and a first positioning ring and a second positioning ring are provided on the outer wall of one side of the sealing plate, and the first positioning ring is sleeved in the first positioning groove, and the second positioning ring is sleeved in the second positioning groove.

[0009] As a further technical solution of the present invention, a fixing sleeve is sleeved on the second outer sleeve, fixing plates are arranged on the outer walls on both sides of the fixing sleeve, and the fixing plates are fixedly connected to the outer walls of the second outer sleeve, and heat dissipation holes are opened on the fixing plates.

[0010] As a further technical solution of the present invention, a third through hole and a heat conducting hole are provided on the outer wall of the second outer sleeve, and the connecting pipe is sleeved in the third through hole.

[0011] A highly wear-resistant oil-free bearing forming process, comprising step one, raw material preparation; step two, blank processing; step three, drying and curing; step four, fine processing and inspection; step five, assembly and forming; step six, packaging and warehousing;

[0012] In the above step 1, a standard H80 brass alloy is used as a matrix, and metal elements and rare earth elements are added to prepare a brass alloy raw material with high wear resistance;

[0013] In the above step 2, a cutting machine is used to cut the brass alloy raw material into the required rough material size, and the rough material is processed into a semi-finished blank by a lathe;

[0014] In the above step 3, the bearing filled with solid lubricant is placed in a dryer for drying to ensure that the solid lubricant is fixed in the hole;

[0015] In the above step 4, the protruding part of the solid lubricant and most of the excess of the copper alloy are cleaned by lathe to ensure that the size and appearance of the bearing meet the design requirements, and a full-size inspection is carried out;

[0016] In the above step 5, the precision-machined parts are finely docked and integrated with the predetermined finished parts;

[0017] In the above step six, the qualified products are packed in plastic film rolls or independently packed in polyethylene plastic nets and then stored in warehouses.

[0018] As a further technical solution of the present invention, in the step 1, a standard H80 brass alloy is selected as a matrix, Si, Mn, Ni, Fe pure metal raw materials and Cr and rare earth elements are prepared, wherein the rare earth elements are a mixture of Gd and La-Ce, a large graphite crucible is used as a smelting container, and is placed in a silicon carbon rod resistance heating furnace, ensuring that the heating furnace has a precise temperature control system and a stable heating capacity, the graphite crucible is preheated to an appropriate temperature to reduce the damage to the crucible caused by the temperature difference, and then the H80 brass alloy and the pure metal raw materials are sequentially loaded into the crucible, and the temperature of the heating furnace is gradually increased to gradually melt the raw materials.

[0019] As a further technical solution of the present invention, in the step 1, during the melting process, a suitable stirring tool is used for stirring to ensure that the alloy elements are evenly distributed in the melt. After the alloy is completely melted, an appropriate amount of CuP10 deoxidizer is added for deoxidation treatment to remove oxygen and other gas impurities in the melt. Subsequently, a dehydrated zinc chloride refining agent is added to further remove non-metallic inclusions and gases in the melt through chemical reactions. After the refining is completed, rare earth elements are added to the melt. During the smelting process, dehydrated activated carbon powder is continuously used as a covering agent and evenly sprinkled on the surface of the melt to reduce oxidation and air absorption of the melt. Appropriate smelting temperature and insulation time are maintained to ensure sufficient diffusion and reaction of the alloy elements. Finally, casting is performed to obtain a brass alloy raw material.

[0020] As a further technical solution of the present invention, in step 1, the mass ratio of the raw materials is: 0.1% to 0.3% Si, 0.2% to 0.5% Mn, 0.5% to 1.0% Ni, 0.1% to 0.3% Fe, 0.2% Cr and 0.2% rare earth elements, and the remainder is H80 brass alloy.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention significantly expands the formation range of the β phase region with greater hardness inside the alloy by adding strengthening elements Si, Mn, Ni, and Fe, and refines the matrix structure by adding Cr and rare earth elements, limits coarse crystallization and reduces gas content, thereby improving the structural density and stability of the material while enhancing its wear resistance, improving the application range and reliability of the oil-free bearing, and is designed with a solid lubricating material pressure structure, which can stably and continuously squeeze and push the solid lubricating material attached to the hole to fit to the friction interface to achieve a continuous and uniform lubrication state, further improving the wear resistance and stability of the bearing, and at the same time, through the embedded heat pipe and heat sink structure, the heat accumulated inside the bearing under high-speed rotation conditions is realized to achieve efficient heat conduction and dissipation, effectively suppress the problem of bearing operating temperature rise, avoid material aging and accelerated wear caused by high temperature, and ensure the service life and reliability of the bearing under high-load and high-speed operating conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the top view of the structure of the present invention;

[0024] Figure 3 It is a schematic diagram of the three-dimensional cutaway structure of the present invention;

[0025] Figure 4 for Figure 3 Schematic diagram of the enlarged structure of the A area in the middle;

[0026] Figure 5 It is a structural explosion diagram of the present invention;

[0027] Figure 6 for Figure 5 Schematic diagram of the enlarged structure of the middle B area;

[0028] Figure 7 for Figure 5 Schematic diagram of the enlarged structure of the middle C region;

[0029] Figure 8 The figure is a flow chart of the process of the present invention.

[0030] In the figure: 1. inner sleeve; 2. limiting ring; 3. first outer sleeve; 4. limiting groove; 5. first through hole; 6. first positioning groove; 7. sealing plate; 8. first positioning ring; 9. second positioning ring; 10. second positioning groove; 11. solid lubricating column; 12. piston; 13. spring; 14. heat conductive layer; 15. second through hole; 16. second outer sleeve; 17. receiving groove; 18. third through hole; 19. heat conductive ring; 20. connecting pipe; 21. heat dissipation pipe; 22. heat sink; 23. fourth through hole; 24. fixing sleeve; 25. fixing plate; 26. heat dissipation hole; 27. heat conductive hole. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Please refer to the attached Figure 1 -Attached Figure 7The present invention provides an embodiment: a highly wear-resistant oil-free bearing, comprising a first outer sleeve 3, a first through hole 5 is formed on the outer wall of the first outer sleeve 3, a solid lubricating column 11 is arranged in the first through hole 5, a piston 12 is arranged on one side of the solid lubricating column 11, and the piston 12 is sleeved in the first through hole 5, a heat conducting layer 14 is fixedly connected to the outer wall of the first outer sleeve 3, a second through hole 15 is formed on the outer wall of the heat conducting layer 14 at a position corresponding to the first through hole 5, a second outer sleeve 16 is fixedly connected to the outer wall of the heat conducting layer 14, and a second outer sleeve 16 is formed on the inner wall of the second outer sleeve 16 at a position corresponding to the second through hole 15 The receiving groove 17 is provided with a spring 13 in the receiving groove 17, and the other end of the spring 13 is provided on the piston 12; the second outer sleeve 16 is provided with a heat-conducting ring 19, and a connecting pipe 20 is provided on the heat-conducting ring 19, and the other end of the connecting pipe 20 is fixedly connected to a heat dissipation pipe 21, and a heat sink 22 is provided on one side of the connecting pipe 20, and a fourth through hole 23 is opened on the heat sink 22, and the heat dissipation pipe 21 is fixedly connected to the fourth through hole 23, and the heat-conducting ring 19, the connecting pipe 20 and the heat dissipation pipe 21 are used to transfer heat, and the heat sink 22 is used to increase the contact area between the heat dissipation pipe 21 and the air, so as to improve the heat dissipation effect; the first outer sleeve A limiting groove 4 is provided on the inner wall of the first outer sleeve 3, an inner sleeve 1 is sleeved inside the first outer sleeve 3, a limiting ring 2 is provided on the outer wall of the inner sleeve 1 at a position corresponding to the limiting groove 4, and the limiting ring 2 is sleeved in the limiting groove 4, and the inner sleeve 1 is used to fix the shaft neck; sealing plates 7 are provided on both sides of the first outer sleeve 3, first positioning grooves 6 are provided on the outer walls of both sides of the first outer sleeve 3, second positioning grooves 10 are provided on the outer walls of both sides of the inner sleeve 1, a first positioning ring 8 and a second positioning ring 9 are provided on the outer wall of one side of the sealing plate 7, and the first positioning ring 8 is sleeved in the first positioning groove 6, and the second positioning ring 9 is sleeved in the second positioning groove 10, and the sealing The plate 7 is used for sealing and preventing dust particles from entering the gap between the inner sleeve 1 and the first outer sleeve 3; a fixing sleeve 24 is sleeved on the second outer sleeve 16, and fixing plates 25 are provided on the outer walls on both sides of the fixing sleeve 24, and the fixing plates 25 are fixedly connected to the outer wall of the second outer sleeve 16, and heat dissipation holes 26 are provided on the fixing plates 25, and the fixing sleeve 24 and the fixing plates 25 are used to support the second outer sleeve 16; a third through hole 18 and a heat conduction hole 27 are provided on the outer wall of the second outer sleeve 16, and the connecting pipe 20 is sleeved in the third through hole 18, the third through hole 18 is used to fix the connecting pipe 20, and the heat conduction hole 27 is used to improve the heat dissipation performance.

[0033] Please refer to the attached Figure 8 The present invention provides an embodiment: a highly wear-resistant oil-free bearing forming process, comprising step one, raw material preparation; step two, blank processing; step three, drying and curing; step four, fine processing and inspection; step five, assembly and forming; step six, packaging and warehousing;

[0034] In the above step 1, a standard H80 brass alloy is selected as a matrix, Si, Mn, Ni, Fe pure metal raw materials, Cr and rare earth elements are prepared, wherein the rare earth elements are a mixture of Gd and La-Ce, a large graphite crucible is used as a smelting container, and is placed in a silicon carbon rod resistance heating furnace, ensuring that the heating furnace has a precise temperature control system and a stable heating capacity, and the graphite crucible is preheated to an appropriate temperature to reduce the damage to the crucible caused by the temperature difference, and then the H80 brass alloy and pure metal raw materials are sequentially loaded into the crucible, and the temperature of the heating furnace is gradually increased to gradually melt the raw materials. During the melting process, a suitable stirring tool is used for stirring to ensure that the alloy elements are evenly distributed in the melt. After the alloy is completely melted, an appropriate amount of CuP10 deoxidizer is added for deoxidation. The process comprises the following steps: removing oxygen and other gas impurities from the melt, then adding a dehydrated zinc chloride refining agent, further removing non-metallic inclusions and gases from the melt through chemical reactions, adding rare earth elements to the melt after the refining is completed, continuously using dehydrated activated carbon powder as a covering agent during the smelting process, and evenly sprinkling it on the surface of the melt to reduce oxidation and air absorption of the melt, maintaining an appropriate smelting temperature and holding time to ensure sufficient diffusion and reaction of the alloying elements, and finally performing casting to obtain a brass alloy raw material, wherein the mass ratio of the raw materials is: 0.1% to 0.3% of Si, 0.2% to 0.5% of Mn, 0.5% to 1.0% of Ni, 0.1% to 0.3% of Fe, 0.2% of Cr and 0.2% of rare earth elements, and the balance is H80 brass alloy;

[0035] In the above step 2, a cutting machine is used to cut the brass alloy raw material into the required rough material size, and the rough material is processed into a semi-finished blank by a lathe;

[0036] In the above step 3, the bearing filled with solid lubricant is placed in a dryer for drying to ensure that the solid lubricant is fixed in the hole;

[0037] In the above step 4, the protruding part of the solid lubricant and most of the excess of the copper alloy are cleaned by lathe to ensure that the size and appearance of the bearing meet the design requirements, and a full-size inspection is carried out;

[0038] In the above step 5, the precision-machined parts are finely docked and integrated with the predetermined finished parts;

[0039] In the above step six, the qualified products are packed in plastic film rolls or independently packed in polyethylene plastic nets and then stored in warehouses.

[0040] Based on the above, the advantages of the present invention are: when producing the present invention, first select a standard H80 brass alloy as a matrix, prepare Si, Mn, Ni, Fe pure metal raw materials and Cr and rare earth elements, wherein the rare earth elements are Gd, La-Ce mixtures, use a large graphite crucible as a smelting container, place it in a silicon carbon rod resistance heating furnace, ensure that the heating furnace has a precise temperature control system and stable heating capacity, preheat the graphite crucible to an appropriate temperature to reduce the damage to the crucible caused by the temperature difference, then load the H80 brass alloy and pure metal raw materials into the crucible in sequence, gradually increase the temperature of the heating furnace, and gradually melt the raw materials. During the melting process, use a suitable stirring tool to stir to ensure that the alloy elements are evenly distributed in the melt. After the alloy is completely melted, add An appropriate amount of CuP10 deoxidizer is used for deoxidation treatment to remove oxygen and other gas impurities in the melt, and then a dehydrated zinc chloride refining agent is added to further remove non-metallic inclusions and gases in the melt through chemical reactions. After the refining is completed, rare earth elements are added to the melt. During the smelting process, dehydrated activated carbon powder is continuously used as a covering agent and evenly sprinkled on the surface of the melt to reduce oxidation and air absorption of the melt. Appropriate smelting temperature and holding time are maintained to ensure sufficient diffusion and reaction of the alloy elements. Finally, casting is performed to obtain brass alloy raw materials. The mass ratio of the raw materials is: 0.1% to 0.3% Si, 0.2% to 0.5% Mn, 0.5% to 1.0% Ni, 0.1% to 0.3% Fe, 0.2% Cr and 0.2% rare earth elements, the balance is H80 brass alloy, use a cutting machine to cut the brass alloy raw material into the required rough material size, and use a lathe to process the rough material into a semi-finished blank; then put the bearing filled with solid lubricant into a dryer for drying to ensure that the solid lubricant is fixed in the hole; use a lathe to clean the protruding parts of the solid lubricant and most of the excess of the copper alloy to ensure that the size and appearance of the bearing meet the design requirements, and conduct a full-size inspection; finely align the precision-machined inner sleeve 1 and the first outer sleeve 3 with the established finished parts Docking and integrated processing; when using the present invention, the inner sleeve 1 is fixed on the shaft neck and rotates with the shaft. The inner sleeve 1 is assembled with the first outer sleeve 3 through the limiting ring 2 and the limiting groove 4. The first outer sleeve 3 is used for external support and fixation of the bearing. During the rotation process, the solid lubricating column 11 in the first through hole 5 forms a transfer film due to friction and adheres to the wear part, and finally forms a solid lubricating film. This lubricating film cuts off the direct contact between the inner sleeve 1 and the first outer sleeve 3, thereby effectively reducing the friction coefficient, protecting the wear part, and extending the service life of the bearing. During the rotation process, the spring 13 in the receiving groove 17 on the second outer sleeve 16 continuously provides elastic force to continuously push the solid lubricating column 11 through the piston 12 to squeeze the friction interface between the inner sleeve 1 and the first outer sleeve 3, and provide lubrication effect uniformly in all directions. Under high-speed rotation conditions, the heat accumulated in the first outer sleeve 3 is transferred to the second outer sleeve 16 through the heat conductive layer 14. The second outer sleeve 16 is made of a material with high thermal conductivity. The built-in heat conductive ring 19 further transfers the heat to the heat dissipation pipe 21 through the connecting pipe 20, and increases the contact between the heat dissipation pipe 21 and the air through the heat sink 22. The contact area is large enough to achieve the purpose of efficient heat dissipation. The fixing sleeve 24 is fixed to the second outer sleeve 16 through the fixing plate 25. The heat dissipation hole 26 is used for air circulation. The sealing plate 7 is made of engineering plastics and is fixed through the first positioning groove 6, the first positioning ring 8, the second positioning ring 9 and the second positioning groove 10 to seal and prevent dust particles from entering the gap between the inner sleeve 1 and the first outer sleeve 3. The second through hole 15 is used to accommodate the spring 13, the third through hole 18 is used to accommodate the connecting pipe 20, the fourth through hole 23 is used to fix the heat dissipation pipe 21, and the heat conduction hole 27 is used to improve the heat dissipation performance.

[0041] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A highly wear-resistant oil-free bearing, comprising a first outer sleeve (3), characterized in that: A first through hole (5) is provided on the outer wall of the first outer sleeve (3), a solid lubricating column (11) is arranged in the first through hole (5), a piston (12) is arranged on one side of the solid lubricating column (11), and the piston (12) is sleeved in the first through hole (5), a heat conducting layer (14) is fixedly connected to the outer wall of the first outer sleeve (3), a second through hole (15) is provided on the outer wall of the heat conducting layer (14) at a position corresponding to the first through hole (5), a second outer sleeve (16) is fixedly connected to the outer wall of the heat conducting layer (14), a receiving groove (17) is provided on the inner wall of the second outer sleeve (16) at a position corresponding to the second through hole (15), a spring (13) is arranged in the receiving groove (17), and the other end of the spring (13) is arranged on the piston (12).

2. A highly wear-resistant oil-free bearing according to claim 1, characterized in that: A heat-conducting ring (19) is arranged in the second outer sleeve (16), a connecting tube (20) is arranged on the heat-conducting ring (19), a heat dissipation tube (21) is fixedly connected to the other end of the connecting tube (20), a heat sink (22) is arranged on one side of the connecting tube (20), a fourth through hole (23) is opened on the heat sink (22), and the heat dissipation tube (21) is fixedly connected to the fourth through hole (23).

3. The highly wear-resistant oil-free bearing according to claim 1, characterized in that: A limiting groove (4) is provided on the inner wall of the first outer sleeve (3); an inner sleeve (1) is sleeved inside the first outer sleeve (3); a limiting ring (2) is provided on the outer wall of the inner sleeve (1) at a position corresponding to the limiting groove (4), and the limiting ring (2) is sleeved in the limiting groove (4).

4. The highly wear-resistant oil-free bearing according to claim 3, characterized in that: Sealing plates (7) are provided on both sides of the first outer sleeve (3); first positioning grooves (6) are provided on both side outer walls of the first outer sleeve (3); second positioning grooves (10) are provided on both side outer walls of the inner sleeve (1); a first positioning ring (8) and a second positioning ring (9) are provided on one side outer wall of the sealing plate (7); the first positioning ring (8) is sleeved in the first positioning groove (6), and the second positioning ring (9) is sleeved in the second positioning groove (10).

5. The highly wear-resistant oil-free bearing according to claim 1, characterized in that: The second outer sleeve (16) is sleeved with a fixing sleeve (24), and fixing plates (25) are arranged on the outer walls of both sides of the fixing sleeve (24). The fixing plates (25) are fixedly connected to the outer wall of the second outer sleeve (16), and heat dissipation holes (26) are opened on the fixing plates (25).

6. The highly wear-resistant oil-free bearing according to claim 2, characterized in that: A third through hole (18) and a heat conducting hole (27) are provided on the outer wall of the second outer sleeve (16), and the connecting pipe (20) is sleeved in the third through hole (18).

7. A highly wear-resistant oil-free bearing forming process, comprising step 1, raw material preparation; step 2, blank processing; step 3, drying and curing; step 4, fine processing and inspection; step 5, assembly and forming; step 6, packaging and storage; characterized in that: In the above step 1, a standard H80 brass alloy is used as a matrix, and metal elements and rare earth elements are added to prepare a brass alloy raw material with high wear resistance; In the above step 2, a cutting machine is used to cut the brass alloy raw material into the required rough material size, and the rough material is processed into a semi-finished blank by a lathe; In the above step 3, the bearing filled with solid lubricant is placed in a dryer for drying to ensure that the solid lubricant is fixed in the hole; In the above step 4, the protruding part of the solid lubricant and most of the excess of the copper alloy are cleaned by lathe to ensure that the size and appearance of the bearing meet the design requirements, and a full-size inspection is carried out; In the above step 5, the precision-machined parts are finely docked and integrated with the predetermined finished parts; In the above step six, the qualified products are packed in plastic film rolls or independently packed in polyethylene plastic nets and then stored in warehouses.

8. A highly wear-resistant oil-free bearing forming process according to claim 7, characterized in that: In the step 1, a standard H80 brass alloy is selected as a matrix, Si, Mn, Ni, Fe pure metal raw materials, Cr and rare earth elements are prepared, wherein the rare earth elements are a mixture of Gd and La-Ce, a large graphite crucible is used as a smelting container, and is placed in a silicon carbon rod resistance heating furnace, ensuring that the heating furnace has a precise temperature control system and a stable heating capacity, and the graphite crucible is preheated to an appropriate temperature to reduce the damage to the crucible caused by the temperature difference, and then the H80 brass alloy and the pure metal raw materials are sequentially loaded into the crucible, and the temperature of the heating furnace is gradually increased to gradually melt the raw materials.

9. A highly wear-resistant oil-free bearing forming process according to claim 8, characterized in that: In the step 1, during the melting process, a suitable stirring tool is used for stirring to ensure that the alloy elements are evenly distributed in the melt. After the alloy is completely melted, an appropriate amount of CuP10 deoxidizer is added for deoxidation treatment to remove oxygen and other gas impurities in the melt. Subsequently, a dehydrated zinc chloride refining agent is added to further remove non-metallic inclusions and gases in the melt through chemical reactions. After the refining is completed, rare earth elements are added to the melt. During the smelting process, dehydrated activated carbon powder is continuously used as a covering agent and evenly sprinkled on the surface of the melt to reduce oxidation and air absorption of the melt. Appropriate smelting temperature and holding time are maintained to ensure sufficient diffusion and reaction of the alloy elements. Finally, casting is performed to obtain a brass alloy raw material.

10. The highly wear-resistant oil-free bearing forming process according to claim 8, characterized in that: In the step 1, the mass ratio of the raw materials is: 0.1% to 0.3% Si, 0.2% to 0.5% Mn, 0.5% to 1.0% Ni, 0.1% to 0.3% Fe, 0.2% Cr and 0.2% rare earth elements, and the balance is H80 brass alloy.

Images