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JF bimetallic composite bearings are made of steel on the outer surface and copper alloy on the inner surface. They can be used under oil-containing conditions and can replace copper sleeves, Babbitt alloys, and roller bearings. They have the advantages of low cost, thin-wall design, small structure, and good wear resistance. They support customers to design various forms of oil grooves and oil holes according to lubrication conditions to adapt to mass production.
In the process of selecting bimetallic bearings, the JF series bearings produced by Mingxu Machinery use high-end modern production equipment and precision molds such as CNC machine tools in the production process. They have strong automated production capabilities, independent research and development of materials, high product precision, and stable quality, which can meet the use needs of different customers for different working conditions. The lead-free bimetallic bearings developed by the company have excellent performance and can replace traditional lead-bronze bimetallic bearings. The product quality and research and development technology are at the international leading level.
Zhejiang Mingxu Machinery Manufacturing Co., Ltd. formerly known as Jiashan Mingxu Precision Machinery Factory, was founded in 2011. The company is located in the hinterland of the Yangtze River Delta Integrated Development Demonstration Zone, with location and convenient transportation. With more than ten years of manufacturing and R&D experience, the company has been deeply involved in the development and production of solid lubricating bearings, skateboards, slideways, and sliders. The product manufacturing adopts modern automation equipment, strictly implements the ISO2000 quality management system standard, and the main processes are processed by high-precision CNC machines. OEM Bimetal Bearing Manufacturers and Custom Bimetal Bearing Factory in China. The company's main products cover a series of products such as JDB solid inlaid self-lubricating bearings, steel-copper sintered bearings, SF-1 self-lubricating bearings, SF-2 boundary self-lubricating bearings, and FB090 copper bearings. Widely used in automobile industry, construction machinery, metallurgical equipment, mining machinery, injection molding, mold, textile, printing and many other machinery manufacturing fields; provide Custom Bimetal Bearing. Till now, the company's products have spread all over China and exported to many foreign countries, and are deeply recognized and loved by domestic and foreign customers.
Mingxu Machinery adheres to the service tenet of "quality-oriented high-quality service", and strive to provide customers with professional products and services. The company will continue to introduce talents, improve the management mechanism, integrity, development, innovation, and strive to build a world-class brand.
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READ MOREBrief description of centrifugal casting process of copper-steel bimetallic sleeves
The main advantages of centrifugally cast steel-copper bimetallic sleeves include:
High-strength bonding: The bonding strength of the copper alloy layer and the steel layer is as high as 150MPa. The metallurgical fusion of the two metals does not delaminate, fall off, or peel off under various working conditions.
Dense structure and good load-bearing performance: The centrifugally cast copper layer has a dense structure, few defects, good load-bearing performance, and strong wear resistance.
Strong adaptability: A variety of steel-based materials and copper alloy grades can be used to adapt to different working conditions.
Small thermal expansion coefficient and stable size: It can play a stable role in a wide temperature range (-100℃ to 300℃). It has both the strength of steel structure and the anti-wear and anti-friction properties of copper alloy. Low cost and high cost performance.
It can be made into self-lubricating bearings: The matrix is embedded with lubricants, which is suitable for medium and high loads, frequent startups, unable to refuel, or difficult to form oil films.
Standard process flow of centrifugal casting of copper-steel bimetallic sleeves
1. For copper-steel bimetallic castings, the casting processing allowance is reserved, with a single side of 20mm and a height of 30mm.
2. Before casting, the billet is cleaned by alkali boiling, pickling and distilled water cleaning in turn.
3. Heat the billet to 300--400℃, and then spray borax solution evenly on the outer surface of the billet.
4. Install the billet into the centrifuge outer mold, and heat the entire mold to 600--800℃ and keep it warm. Combine the billet and the outer mold and wait for pouring. Spray alcohol zircon powder paint in the outer mold to facilitate heat preservation and demolding.
5. The solution melting temperature reaches 1150--1200℃, and the pouring temperature is 1000-1050℃.
6. Clean the tools such as hanging bags, pouring ladles and pouring spoons, apply lead powder paint, and preheat to above 100℃.
7. When pouring, put slag cotton in the hanging bag, ladle and pouring spoon to prevent slag from being drawn into the casting. When pouring, the copper liquid should be poured in an oblique manner, the pouring speed should be fast, and the copper slag in the casting should be skimmed clean with a scraper.
8. After the pouring is completed, the machine is stopped after the inner hole of the casting is finalized.
Casting insulation process
1. Transfer the finished casting to the insulation box for insulation, turn on the power, the insulation temperature is 300-500℃, and the insulation time is 1-2 hours.
2. After the insulation time is reached, turn off the power of the insulation box, wait for the casting to cool down, take out the casting, and process it.
Copper-steel bimetallic centrifuge process
Steel billet cleaning → steel billet heating spray borax solution → casting mold combined heating and insulation → copper alloy smelting and pouring → centrifuge casting → casting mold high temperature insulation → casting mold cooling processing.
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