The copper sleeve is rolled non-ferrous copper. The cross section of the sleeve is a circle with an internal cavity. Copper bushings are used in various areas of industrial production. They are used to glorify the fortieth deity in mechanisms operating “on friction and sliding”. Bushings play the role of an economical material, protecting it from wear by working mechanisms and assemblies.
In industry, copper bushings with a diameter of 50 mm to 1000 mm are used.
The copper sleeve is used as a rotating or rolling part, corrosion resistant.
Depending on the method of application, there are fastening, sealing, bearing and adapter sleeves.
The positive properties of copper bushings as parts of mechanisms and assemblies are:
- abrasion resistance;
- corrosion resistance;
- the ability to work in a wide temperature range;
- strength and durability;
- relative cheapness;
- high moisture resistance.
The most common method of manufacturing bushings is centrifugal casting. This method allows the production of high-quality products with improved mechanical properties and high density. In addition, such bushings have a low cost.
The sleeve centrifugal casting method consists in filling the mold with a copper alloy and subsequent hardening of the product under the influence of centrifugal forces, which significantly exceed the force of gravity.
During the technological process, solid metal particles touching the walls of the mold are pressed against it and stop floating. The centrifugal casting method is one of the most common casting methods. Most often, the method is used for the production of hollow castings. First, the mold is filled with molten copper alloy, which rotates, and then centrifugal force is applied to it. The centrifugal casting production process is carried out on centrifugal casting machines. The shape of the sleeve causes rotation around an inclined axis, either horizontal or vertical.
Copper bushings formed by centrifugal casting are characterized by:
- high density;
- no shells in the metal;
- no foreign inclusions in the metal of the sleeve.
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