CN113187818A - Method for manufacturing bush of sliding bearing - Google Patents
Method for manufacturing bush of sliding bearing Download PDFInfo
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- CN113187818A CN113187818A CN202110487348.8A CN202110487348A CN113187818A CN 113187818 A CN113187818 A CN 113187818A CN 202110487348 A CN202110487348 A CN 202110487348A CN 113187818 A CN113187818 A CN 113187818A
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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
- 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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- 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
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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
- 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
- F16C33/121—Use of special materials
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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
- 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
- F16C33/124—Details of overlays
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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
- 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
- F16C33/125—Details of bearing layers, i.e. the lining
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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
- 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
- F16C33/127—Details of intermediate layers, e.g. nickel dams
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
本发明提供了一种滑动轴承的轴瓦的制造方法，利用巴氏合金半固态浆料具有挤出时流动和静止时保持固态的触变性特点，在沉积过程中具有堆塑性，可沉积厚度较高的巴氏合金层组织，并且巴氏合金半固态浆料具有较高的液相分数，堆塑层之间属于冶金结合，还可根据所需巴氏合金层组织的厚度进行多层沉积，生产效率上远远高于电弧增材制造方法和铸造工艺，同时大大降低了传统铸造工艺所需要的工装成本和加工余量。且在堆塑过程中采用超声振动作用于半固态沉积层，均匀化合金成分和硬质点相的分布，提高和改善巴氏合金层组织的内部质量和层间结合质量，从而高质量、高效率的实现轴瓦的生产。
The invention provides a method for manufacturing a bearing bush of a sliding bearing, which utilizes the thixotropy characteristics of the babbitt alloy semi-solid slurry to flow during extrusion and remains solid during static state, has heap plasticity in the deposition process, and can be deposited with a high thickness The structure of the babbitt alloy layer is very high, and the babbitt alloy semi-solid slurry has a high liquid phase fraction. The plastic layers are metallurgically bonded. Multi-layer deposition can also be carried out according to the thickness of the required babbitt layer structure to produce The efficiency is much higher than that of the arc additive manufacturing method and the casting process, and at the same time, the tooling cost and machining allowance required by the traditional casting process are greatly reduced. In the process of piling, ultrasonic vibration is used to act on the semi-solid deposition layer to homogenize the distribution of alloy components and hard point phases, and to improve and improve the internal quality and interlayer bonding quality of the babbitt layer structure. Efficient realization of bearing bush production.
Description
Technical Field
The invention relates to the technical field of machine manufacturing, in particular to a manufacturing method of a bearing bush of a sliding bearing.
Background
The requirements for high precision and long-term high-efficiency operation of a mechanical transmission structure are higher and higher, and a sliding bearing is used as a key part for supporting and operating, and is widely applied to the mechanical equipment due to high bearing capacity, high precision and good retentivity during high-speed operation, excellent damping performance, small operation noise, stability and long-term effective life. The tin-based babbitt metal is an ideal bearing bush material for large-scale machinery because of excellent comprehensive properties such as excellent antifriction property, good embeddability, friction compliance and corrosion resistance.
The babbit alloy bearing bush is mainly prepared by casting composite forming, wherein medium-low carbon steel or medium-low carbon alloy steel is mainly used as a backing material, a babbit alloy layer structure is formed by carrying out hydrogen diffusion annealing treatment on a backing forge piece, machining, cleaning, preheating, hot dipping tin coating and adopting a gravity casting or centrifugal casting method, the casting composite preparation process has the defects of high bush removal rate, low bonding strength of multiple layers of metal, easiness in occurrence of casting defects and the like, and for the bearing bush required by large machinery, the cost of a mould and operating equipment required by a casting process is high, and the production period is long. Meanwhile, in order to improve the bonding strength between the babbitt metal layer structure and the backing, wedge-shaped grooves are generally processed on the inner surface of the backing to increase the surface area so as to achieve the purpose of improving the bonding strength. Because the bearing bush working surface is often a curved surface, the gravity casting has to improve the thickness of the casting layer to overcome the property unevenness of each part caused by segregation, which causes the waste of time and materials, even if the centrifugal casting is adopted, the surface defects are more, and the processing allowance of casting the Babbitt metal layer structure of the composite process is 1-3 times of the thickness of the working layer. In addition, in practical application, the cast composite bearing bush is subjected to local repair in the working process, no matter flame heating or electric arc heating repair is carried out, due to the fact that thermal stress generated by local expansion of the backing is frequently generated, the bearing bush alloy layer falls off, and the bearing bush needs to be integrally disassembled and assembled for secondary casting composite.
The electric arc surfacing welding process is another method for producing bearing bushes, and the welding processes mainly comprise two types: argon tungsten arc welding (TIG) and Metal Inert Gas (MIG). The electric arc additive manufacturing process is relatively simple to operate, and after the backing material is forged and thermally treated, the babbitt metal layer structure composite additive manufacturing in all directions is directly realized on the backing material under the cooperation of a welding robot and a deflection tool clamp. The arc surfacing production process has the following defects: due to the fact that the arc temperature is as high as 2600K or more, a series of influences are brought: firstly, the surface layer of a backing under the impact of high-temperature electric arc is easy to melt, Fe element floats to the structure of a Babbitt alloy layer due to relatively low density, forms a compound with higher hardness with other alloy elements, is unevenly distributed, has large damage to a running main shaft, and influences the service life of the main shaft; secondly, for medium carbon steel or alloy steel, a layer of hardened structure is easily formed on the surface layer of the backing, the toughness of the bonding layer is reduced, and the service life of the sliding bearing is reduced; in addition, the high-temperature electric arc enables the structure of the low-melting-point Babbitt alloy layer to easily generate splashing and volatilization, and is easily oxidized to form black oxide inclusions, air holes and other defects, and the quality of the welding seam under the protective atmosphere is more limited by the surrounding environment; finally, babbitt alloy is easy to flow and has great influence on welding continuity, in the actual surfacing process, the babbitt alloy is easy to flow to form welding feet with irregular shapes, which is a main source for generating air holes and impurities, in order to ensure the formability of a surfacing layer and the quality of a welding seam, the welding process needs to be stopped according to the solidification completion condition of the surfacing welding bead and the generation situation of splashes and oxides, so that the production efficiency is limited, therefore, when the bearing bush used by a large-scale machine is manufactured, the tissue thickness of a babbitt alloy layer is more than 100mm, the production period is long, and the cost of the welding wire required in the actual production is also higher.
Disclosure of Invention
The invention aims to provide a method for manufacturing a bearing bush of a sliding bearing, which solves the problems of high manufacturing cost, low efficiency and the like of the conventional bearing bush of the sliding bearing.
In order to achieve the above object, the present invention provides a method of manufacturing a bush for a sliding bearing, comprising:
providing a tin-plated backing, and preheating a predetermined area of a tin-plated surface of the tin-plated backing;
extruding the babbitt metal semi-solid slurry on the preset area to form a semi-solid deposition layer;
and carrying out vibration treatment on the semi-solid deposition layer by using ultrasonic waves so as to convert the semi-solid deposition layer into a refined and homogenized babbitt metal layer structure.
Optionally, the predetermined area of the tin plating surface is preheated by argon gas at 220-250 ℃ to heat the predetermined area of the tin plating surface to 220 ℃.
Optionally, the solid-phase volume fraction of the babbitt metal semi-solid slurry is 25-35%.
Optionally, the babbitt metal semi-solid slurry is Sn-Sb-Cu ternary babbitt metal, wherein the solid phase in the two-phase temperature interval is Cu6Sn5And extruding the Babbitt alloy semi-solid slurry at the temperature of 250-310 ℃.
Optionally, Ag and/or Ni is added to the babbitt metal semi-solid slurry.
Optionally, the thickness of the structure of the single babbitt metal layer is 2 mm-10 mm.
Optionally, the vibration frequency of the ultrasonic wave is 5000HZ to 20000HZ, and the power is greater than 1000W.
Optionally, the method comprises the step of manufacturing a bush for a sliding bearing, wherein the tin-plated backing is cylindrical, and the tin-plated backing is rotated in an axial direction while the babbitt metal semi-solid slurry is extruded on the predetermined region.
Optionally, after the semi-solid deposition layer is converted into the babbitt metal layer structure, the babbitt metal layer structure is detected by a dye permeation process and an ultrasonic flaw detection process, and after the babbitt metal layer structure is detected to be qualified, the surface of the babbitt metal layer structure is ground to the required precision.
The method for manufacturing the bearing bush of the sliding bearing has the following beneficial effects:
1) the Babbitt metal semisolid slurry has the characteristic of thixotropy of flowing during extrusion and keeping solid during standing, has stacking plasticity during deposition, can deposit Babbitt metal layer tissues with higher thickness, has higher liquid phase fraction, belongs to metallurgical bonding between stacking and molding layers, can perform multilayer deposition according to the thickness of the required Babbitt metal layer tissues, is far higher than an electric arc additive manufacturing method and a casting process in production efficiency, and greatly reduces tooling cost and machining allowance required by the traditional casting process;
2) the semi-solid Babbitt alloy slurry has very fine structure, and hard phase particles Cu are formed in the heating process6Sn5The Babbitt metal semi-solid slurry with fine solid phase particles has good formability under ultrasonic vibration, and the upper and lower layers are metallurgically bonded to form a whole under the action of the ultrasonic vibration, and Cu is promoted6Sn5The ultrasonic vibration is adopted to act on the semi-solid deposition layer in the plastic stacking process, the distribution of alloy components and hard point phases is homogenized, the internal quality and the interlayer bonding quality of the Babbitt metal layer structure are improved, and the production of the bearing bush is realized with high quality and high efficiency;
3) the controllability of the stack layer thickness of the babbit metal layer structure can realize the near-net forming of the double-layer bearing bush, reduce the machining cost, improve the yield, facilitate the automatic production, improve the production efficiency and reduce the production cost;
4) the heating temperature of the babbitt metal semi-solid slurry is lower in the deposition process, compared with the casting and welding process, the automation is easy, the labor environment intensity is greatly reduced due to the closed heating system, harmful elements such As As and Pb do not need to be added into the babbitt metal semi-solid slurry, and the environment-friendly modern manufacturing industry development requirement is met.
Drawings
Fig. 1 is a flowchart of a method for manufacturing a bearing shell of a sliding bearing according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a manufacturing apparatus of a bush of a sliding bearing according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a slurry extrusion module in a manufacturing device of a bearing shell of a sliding bearing according to an embodiment of the invention;
fig. 4a and 4b are metallographic structure photographs of the babbitt metal layer structure without ultrasonic vibration treatment and the babbitt metal layer structure with ultrasonic vibration treatment at 1000W power provided by the embodiment of the present invention, respectively.
Wherein the reference numerals are:
1-a slurry extrusion module; 2-preheating module; 3-an ultrasonic vibration module; 4-tin-plated backing; 41-tin plating surface; 5-babbitt layer structure;
11-a screw stirring mechanism; 12-a containment chamber; 13-heating a belt; 14-a cooling zone; 15-tin-based rods; 16-a conveyor roller; 17-sealing flange, 18-babbit alloy semi-solid slurry.
Detailed Description
The following describes in more detail embodiments of the present invention with reference to the schematic drawings. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
Fig. 1 is a flowchart of a method for manufacturing a bearing shell of a sliding bearing according to this embodiment. As shown in fig. 1, the method of manufacturing the bush of the sliding bearing includes:
step S1: providing a tin-plated backing, and preheating a predetermined area of a tin-plated surface of the tin-plated backing;
step S2: extruding the babbitt metal semi-solid slurry on the preset area to form a semi-solid deposition layer;
step S3: and carrying out vibration treatment on the semi-solid deposition layer by using ultrasonic waves so as to convert the semi-solid deposition layer into a refined and homogenized babbitt metal layer structure.
The bearing shell of the sliding bearing is, for example, a heavy main shaft bearing for a hydroelectric generating set with the rated power of 260MW, the material of the steel backing of the tinned backing 4 is, for example, 20-grade steel, and the Babbitt metal layer structure 5 is ZSnSb8Cu4The thickness is 100 mm. Next, in the present embodiment, a method for manufacturing a bush of a sliding bearing will be described in detail with reference to an apparatus for manufacturing a bush of a sliding bearing in fig. 2. The manufacturing device of the bearing bush of the sliding bearing comprises a slurry extrusion module 1, a preheating module 2 and an ultrasonic vibration module 3.
Specifically, step S1 is first performed to provide the tin-plated backing 4, and the surface of the tin-plated backing 4 has the tin-plated surface 41 (the surface on which the build-up solder layer is to be underlying). Blowing argon gas at 220-250 ℃ to a predetermined area of the tin plating surface 41 of the tin plating backing 4 by using the preheating module 2 to preheat the predetermined area of the tin plating surface 41 of the tin plating backing 4.
In this embodiment, the preheating mold is an argon blowing hot air blower, the rated power of the argon blowing hot air blower is 1500w, and the air inlet is connected with the argon storage tank by using the sealing fan cover.
Next, step S2 is performed, and when the temperature of the predetermined area of the tin plating surface 41 is heated to 220 ℃, the semi-solid slurry 18 of babbitt metal is extruded on the predetermined area by the slurry extrusion module 1, and a semi-solid deposition layer is formed. The solid-phase volume fraction of the babbitt metal semi-solid slurry 18 is 25% -35%, in this embodiment, the babbitt metal semi-solid slurry 18 is Sn-Sb-Cu ternary babbitt metal, wherein the solid phase in the two-phase temperature range is Cu6Sn5And the temperature of the slurry extrusion module 1 when extruding the Babbitt alloy semi-solid slurry 18 is 250-310 ℃, and the thickness of the semi-solid deposition layer is 2-10 mm.
Fig. 3 is a schematic structural diagram of the slurry extrusion module 1. As shown in fig. 3, the slurry extrusion module 1 has a containing cavity 12, one end of the containing cavity 12 is open, and the other end is sealed by a sealing flange 17, and a section of the containing cavity 12 is provided with a screw stirring mechanism 11 for stirring the babbitt metal semi-solid slurry 18 contained in the containing cavity 12. And a heating belt 13 and a cooling belt 14 are arranged on the other section of the accommodating cavity 12, a tin-based bar material 15 passes through the sealing flange 17 through a conveying roller 16 and is conveyed into the accommodating cavity 12, and passes through the cooling belt 14 and the heating belt 13 in sequence, and the tin-based bar material is heated by the heating belt 13 and then is melted into the babbitt metal semi-solid slurry 18.
Further, the tin-based bar material 15 is a raw material bar formed by rapid cooling after large deformation hot extrusion, the inner wall is cleaned, degreased, derusted and dried, then the tin-plated layer is hot-dipped and placed on the conveying roller 16, the matrix alpha-solid solution has fine (micron-sized) isometric crystal grain microstructure characteristics, and the hardening phase is Cu6Sn5And is spherical and has a diameter of less than 5 μm.
In this embodiment, the babbitt metal semi-solid slurry 18 is added with elements such as Ag and/or Ni to enhance the strength of the babbitt metal semi-solid slurry 18, but the following elements harmful to human body should not be included: such As 0.1% As to promote grain refinement during casting, and 0.35% Pb to reduce segregation.
It is to be understood that the tin-plated backing 4 is cylindrical, and when the babbitt metal semi-solid slurry 18 is extruded on the predetermined region, the tin-plated backing 4 is rotated in the axial direction by using a roller frame or an automatic transfer device, and the moving speed is adjusted between 0cm/min and 200cm/min as required.
In this embodiment, the tin-based rod 15 includes, as chemical components (mass fraction), 7.5% of Sb, 3.5% of Cu, 0.03% of Ag, 0.5% of Ni, and the balance Sn. The diameter of the tin-based bar 15 is 20 mm. The temperature of a cooling belt 14 of the slurry extrusion module 1 is controlled to be 20-30 ℃, the temperature of a heating belt 13 is controlled to be 280-310 ℃, the temperature of a screw stirring mechanism 11 is controlled to be 270-280 ℃, the rotating speed of a screw is 3000rpm, and the diameter of an extrusion opening is 10 mm.
The extruding speed of the babbitt metal semisolid slurry 18 is controlled to be about 60cm/min by the conveying roll 16, the conveying roll 16 clamps the tin plating backing 4 to operate and keep the deposition position in a horizontal position, the moving speed of the tin plating backing 4 workpiece is 50cm/min, and the thickness of the semisolid deposition layer is controlled to be about 10 mm.
Next, step S3 is performed, in which the semi-solid deposition layer is vibrated by the ultrasonic vibration module 3 to convert the semi-solid deposition layer into a babbitt metal layer structure 5. The vibration frequency of the ultrasonic wave is 5000 HZ-20000 HZ, and the power is more than 1000W.
The ultrasonic vibration tool head of the ultrasonic vibration module 3 needs to be in contact with the semi-solid deposition layer, so that the ultrasonic vibration tool head is processed by high-temperature-resistant thermosetting plastics, and the ultrasonic vibration tool head is prevented from being damaged due to high temperature.
In this embodiment, the vibration ultrasonic power of ultrasonic vibration module 3 is 1000W, and the vibration frequency is 10000HZ, the ultrasonic tool head according to the thickness adjustment of semi-solid sedimentary deposit, only need contact newest the surface of semi-solid sedimentary deposit can.
If the babbitt metal layer structure 5 required by the bearing shell is thicker, the steps S2-S3 can be repeated to form the babbitt metal layer structure 5 stacked in multiple layers until the required thickness is reached.
Further, after the semi-solid deposition layer is converted into the babbitt metal layer structure 5, the babbitt metal layer structure 5 is detected by adopting a coloring and penetrating process and an ultrasonic flaw detection process, and the surface of the babbitt metal layer structure 5 is ground to the required precision after the detection is qualified.
Fig. 4a and 4b are metallographic photographs of the babbitt metal layer structure 5 which was not subjected to ultrasonic vibration treatment and the babbitt metal layer structure 5 which was subjected to ultrasonic vibration treatment with a power of 1000W, respectively. As can be seen from fig. 4a and 4b, the babbitt metal layer structure 5 subjected to ultrasonic vibration treatment with 1000W power has a small tendency of shrinkage porosity, and has better mechanical properties and wear resistance.
In conclusion, the manufacturing method of the bearing bush of the sliding bearing provided by the invention utilizes the characteristic that the babbitt metal semisolid slurry has the thixotropy of flowing during extrusion and keeping solid state during standing, has bulk plasticity during deposition, can deposit the babbitt metal layer structure with higher thickness, and the babbitt metalThe semi-solid slurry has higher liquid phase fraction, belongs to metallurgical bonding between stacking and molding layers, can be subjected to multilayer deposition according to the thickness of a required babbitt metal layer structure, has production efficiency far higher than that of an electric arc additive manufacturing method and a casting process, and greatly reduces tooling cost and machining allowance required by the traditional casting process; the semi-solid Babbitt alloy slurry has very fine structure, and hard phase particles Cu are formed in the heating process6Sn5The Babbitt metal semi-solid slurry with fine solid phase particles has good formability under ultrasonic vibration, and the upper and lower layers are metallurgically bonded to form a whole under the action of the ultrasonic vibration, and Cu is promoted6Sn5The ultrasonic vibration is adopted to act on the semi-solid deposition layer in the plastic stacking process, the distribution of alloy components and hard point phases is homogenized, the internal quality and the interlayer bonding quality of the Babbitt metal layer structure are improved, and the production of the bearing bush is realized with high quality and high efficiency; the controllability of the stack layer thickness of the babbit metal layer structure can realize the near-net forming of the double-layer bearing bush, reduce the machining cost, improve the yield, facilitate the automatic production, improve the production efficiency and reduce the production cost; the heating temperature of the babbitt metal semi-solid slurry is lower in the deposition process, compared with the casting and welding process, the automation is easy, the labor environment intensity is greatly reduced due to the closed heating system, harmful elements such As As and Pb do not need to be added into the babbitt metal semi-solid slurry, and the environment-friendly modern manufacturing industry development requirement is met.
The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any way. It will be understood by those skilled in the art that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. A method of manufacturing a bearing shell of a sliding bearing, comprising:
providing a tin-plated backing, and preheating a predetermined area of a tin-plated surface of the tin-plated backing;
extruding the babbitt metal semi-solid slurry on the preset area to form a semi-solid deposition layer;
and carrying out vibration treatment on the semi-solid deposition layer by using ultrasonic waves so as to convert the semi-solid deposition layer into a refined and homogenized babbitt metal layer structure.
2. A method of manufacturing a shell for a plain bearing according to claim 1, wherein the predetermined area of the tin plating surface is preheated with argon gas at 220 to 250 ℃ to heat the predetermined area of the tin plating surface to 220 ℃.
3. A method of manufacturing a bearing shell for a plain bearing according to claim 1, wherein the babbitt metal semi-solid slurry has a solid phase volume fraction of 25% to 35%.
4. A method of manufacturing a bearing shell for a plain bearing according to claim 1, wherein the babbitt metal semi-solid slurry is Sn-Sb-Cu ternary babbitt metal, and wherein the solid phase in the two-phase temperature range is Cu6Sn5And extruding the Babbitt alloy semi-solid slurry at the temperature of 250-310 ℃.
5. A method of manufacturing a shell for a plain bearing according to claim 4, wherein Ag and/or Ni are added to the Babbitt metal semi-solid slurry.
6. A method of manufacturing a bearing shell for a plain bearing according to claim 1, wherein the thickness of the structure of the single babbitt metal layer is 2mm to 10 mm.
7. A method of manufacturing a bearing shell for a plain bearing according to claim 1, wherein the ultrasonic wave has a vibration frequency of 5000HZ to 20000HZ and a power of more than 1000W.
8. A method of manufacturing a shell for a plain bearing according to claim 1, wherein the tin-plated backing is cylindrical, and the tin-plated backing is rotated in an axial direction while the babbitt metal semi-solid slurry is extruded on the predetermined region.
9. The method for manufacturing a bearing shell of a sliding bearing according to claim 1, wherein after the semi-solid deposition layer is transformed into the babbitt metal layer structure, the babbitt metal layer structure is detected by a dye penetrant process and an ultrasonic inspection process, and after the detection is passed, the surface of the babbitt metal layer structure is ground to a required precision.
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| CN202110487348.8A CN113187818A (en) | 2021-05-05 | 2021-05-05 | Method for manufacturing bush of sliding bearing |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1259180A (en) * | 1969-12-18 | 1972-01-05 | ||
| US4117580A (en) * | 1975-04-07 | 1978-10-03 | Friedrich Heck | Manufacture of bearings |
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