Which is more wear resistant, graphite copper sleeve or graphite steel sleeve

I saw that all of them were made of copper sleeves, and there were very few places where aluminum sleeves were used, and I had never seen those with steel sleeves.

The lubrication principle of graphite copper sleeve Henan Dashan non-ferrous metal is that in the process of sliding friction between the shaft and the bearing, a part of the graphite particles is transferred to the friction surface of the shaft and the bearing, forming a relatively stable solid lubrication diaphragm to prevent the direct adhesion and wear of the shaft and the bearing.

This rational combination combines the respective performance advantages of metal alloy and non-Henan Dashan non-ferrous metal anti-friction materials, and complements each other, which not only has the high load-bearing capacity of the metal, but also obtains the lubricating properties of the anti-friction materials. Therefore, it is especially suitable for no lubrication, less lubrication, high temperature, high load or water and other environments.

Extension of knowledge points:

Graphite copper sleeve, also known as self-lubricating bearing, is a product with self-lubricating performance that develops well-arranged, appropriately sized holes on the friction surface of Henan Dashan non-ferrous metal copper sleeve as a metal matrix, and embeds graphite or molybdenum disulfide as a solid lubricant.

At present, graphite copper sleeve has been widely used in construction machinery, metallurgical machinery, mining machinery, locomotive support, rolling equipment, ship machinery, mold equipment, textile machinery, gas turbines and other low-speed heavy-duty, high-speed Henan Dashan non-ferrous metal light load and other occasions.

The scientific name of graphite steel sleeve is JDB or JDB graphite inlay bushing, and there are about several types of them sold in the market, and I try to say it in an easy-to-understand manner.

1. Colliers brass set inlaid with graphite rods.

2. Bronze set inlaid with graphite rods.

3. The cast iron sleeve is inlaid with graphite rods.

4. A thin copper sleeve is inlaid on the inside of the iron sleeve, and then punched and inlaid with graphite together.

5. Ordinary iron sleeve perforated and inlaid with graphite.

These kinds of wear resistance are Gaoli brass inlaid graphite rods, and the iron sleeve inlay has a high compressive capacity, which is used in Henan Dashan non-ferrous metal use occasions.

Graphite copper sleeves and ball bearings are easy to use, mainly depending on what they are used in.

Graphite copper sleeves are generally used in the case of high bearing capacity and self-lubrication.

Ball bearings are generally used in the case of low load but high speed, and Rongchang graphite copper sleeve is made of high-strength brass as the matrix, and then inlaid with graphite.

The diameter of the ball is +2 microns, the crankshaft of the general punch is a steel part, 45 steel or 40cr or 42crmo and other materials, the quenching and tempering treatment HB is above 250, the surface can reach about HRC45 if the surface is quenched, the quenching and tempering hardness of the steel sleeve is about HB250, if the crankshaft is not surface quenched, there is almost no difference in the hardness of the two, it is easy to stick and bite, and the steel sleeve oil groove is difficult to process. Therefore, the general punch press uses copper sleeve as the sliding bearing. If the bearing makes the stubble full length household use, it is used in a wide range of high-speed punches, and the heating problem of high-speed punch speed and high copper sleeve pads cannot be solved.

In addition, the bearing of the punch press is a roller and a needle roller bearing and are used in pairs, which is higher and can be used in a high-speed punch, and it is not economical to use an ordinary punch.

The graphite copper sleeve is suitable for low speed and heavy load, and it is a high-strength Rongchang copper alloy.

CUZN25AL5, CUZN24AL6FE3MN4) as the base material, according to the working conditions, according to the working conditions according to a certain proportion of the hole is machined and filled with solid lubricant, the high-strength copper alloy provides a high load-bearing capacity, and the solid lubricant can form a low friction pair. Under dry friction conditions, we design a pre-lubricated film on the bearing surface.

This ensures that the solid lubricant is transferred to the coupling in the shortest possible time and an effective solid lubricating film is formed.

The linear bearing is the rolling friction of Henan Dashan non-ferrous metal, and the graphite copper sleeve is the sliding friction. Linear bearing friction coefficient below, need to see the quality of the product, graphite copper sleeve friction coefficient is not too clear, personal estimates, should be larger than the linear guide rail this depends on the size of the matching shaft diameter, different shaft diameters and different speeds, Henan Dashan non-ferrous metal graphite copper sleeve in the oil-free state of the linear speed is the highest linear speed of 2m s (continuous oiling).

In terms of wear resistance, the steel sleeve is higher than the copper sleeve, and the actual use of the steel sleeve is very small, which will wear out the shaft quickly. Typically, when designing a bearing plain bearing, the shaft and sleeve must be made of two materials. Since the shaft is rotated and the bearing is fixed, friction will inevitably occur during rotation, resulting in wear and tear on the shaft and bearing.

The processing and disassembly accuracy of the shaft and the difficulty of assembly, the bearing is fixed maintenance or replacement is easier, so in the selection of materials, the material of the bearing is consciously selected softer, phosphine, tin bronze, aluminum iron bronze, tin, zinc, lead bronze, etc., according to different conditions of use to choose different copper alloys, and the material of the shaft will be harder or more wear-resistant. In this way, in almost all shaft-bearing matings, the shaft will be made of steel and the bearing will be made of copper. To be precise:

Babbitt is a tin- and lead-based bearing alloy with anti-friction properties. This is because copper is not as wear-resistant as steel, and copper is chosen as the bearing pad in order to protect the shaft.

Compared with the graphite copper sleeve, aluminum bronze 94 copper should be more wear-resistant than the graphite copper sleeve.

The bearing capacity of aluminum bronze 94 copper and graphite copper sleeve is about the same. According to the production experience of Jiashan Rongchang graphite copper sleeve, the hardness of graphite copper sleeve is harder than the hardness of 94 copper, so they are almost the same in terms of bearing capacity.

Abrasion resistance: Graphite copper sleeve has self-lubrication, while 94 copper does not have this feature. However, if 94 copper is processed with oil grooves, the effect may not be the same. There is a style of the oil tank.

When 94 copper is lubricated with oil, the effect will be better!

The following are some of the application features and benefits of self-lubricating bearings:

Oil-free lubrication bearing series.

2. Good wear resistance, small friction coefficient and long service life. 3. It has an appropriate amount of elastoplasticity, which can distribute the stress on a wide contact surface and improve the bearing capacity.

4. The static and dynamic friction coefficients are similar, which can eliminate crawling at low speed, so as to ensure the working accuracy of the machinery.

5. It can reduce vibration, reduce noise, prevent pollution and improve working conditions.

6. During the operation process, the transfer film can be formed, which plays a role in protecting the grinding shaft, and there is no bite shaft phenomenon.

7. The hardness requirements for the grinding shaft are low, and the shafts without quenching and tempering treatment can be used, which reduces the processing difficulty of related parts.

8. Thin-walled structure, light weight, can reduce mechanical volume.

9. The back of the steel can be electroplated with a variety of metals, which can be used in corrosive media; At present, it has been widely used in the sliding parts of various machinery, such as: printing press, textile machine, tobacco machinery, micro motor, automobile, motorcycle, agricultural and forestry machinery, etc.

Boundary lubrication self-lubricating bearing graphite copper sleeve series.

1.Good bearing and good wear resistance.

2.It is suitable for rotating motion, rocking motion under high load and low speed, and often opens and closes frequently under load and is not easy to form hydrodynamic lubrication.

4.The surface plastic layer can leave a certain margin when processing and molding, and it can be processed by itself after being pressed into the seat hole to achieve a better assembly size.

5.The oil-free self-lubricating bearing products produced by Qufu Miaokong Industrial and Mining Parts Factory are mainly used in automobile chassis, metallurgical machinery, mining machinery, water conservancy machinery, construction machinery, agricultural machinery, steel rolling equipment, etc.

Wear-resistant, reduce the friction between shafts and shafts, and prolong the life of bearings!

Abrasion resistance, high temperature resistance, long service life.

Glue may be needed when making oil-free self-lubricating bearings, because graphite and copper are solid, and there must be gaps in the close fit between solids and solids. According to years of experience, Xieli Graphite can be used with sealant or lubricating glue, which can not only bond graphite column and copper sleeve hole well, but also fill the gap between the copper hole position of graphite particles, of course, the gap can not be too large, it is generally best to control it around the left, the amount of glue will increase if the gap is too large, and the lubricating graphite column of Xieli Graphite, graphite particles are processed by high-density graphite car, and the diameter is very standard and unified, and the diameter will not be different from the one bought next time. For more information about oil-free self-lubricating bearings, please click here.

The use of graphite copper sleeve is:

1. The use of graphite copper sleeve vacuum immersion technology fully ensures that any gap between the graphite column tissues is immersed in saturated lubricating oil, so that after the matrix is heated by relative friction, the volume of oil molecules expands and seeps out from the graphite column tissue to the surface of the matrix, which instantly reduces the temperature of the substrate and achieves the ideal self-lubricating effect. The selection of high-quality graphite and the use of advanced powder extrusion sintering technology make the structure of the graphite column uniform and dense standard, fully ensure that the lubricating oil content between the tissues is sufficient, so that the wear degree of the non-ferrous metal guide plate guide sleeve matrix in Henan Dashan is reduced, and the service life is effectively prolonged.

2. The brass guide plate of graphite copper sleeve is made of high-strength brass material rolled by continuous casting and extrusion, which has a dense structure and few impurities to ensure excellent wear resistance; If inferior materials are used, the composition and mechanical properties cannot be guaranteed, and the organizational structure is poor, which directly affects the service life of Henan Dashan non-ferrous metal guide plate guide sleeve and grinding parts.