Basic knowledge and maintenance of agricultural machinery castings


Release time:

2022-07-13

Agricultural machinery castings have good wear resistance and consumption. The graphite of cast iron is good for lubrication and oil storage, so it has good wear resistance. Also, gray cast iron burns better than steel due to the presence of graphite.

Basic knowledge and maintenance of agricultural machinery castings

Agricultural machinery casting a large number of casting products have mechanical casting, resin sand casting, lost foam casting, etc., the material is very good fine gray cast iron HT200-HT300. With the correct proportion, higher tensile bending strength can be purchased with confidence.

农用机械铸件

agricultural machinery casting features:

Agricultural machinery castings have good wear resistance and consumption. The graphite of cast iron is good for lubrication and oil storage, so it has good wear resistance. Also, gray cast iron burns better than steel due to the presence of graphite.

The casting process capability of the machine is good. Gray cast iron is suitable for complex casting structures or thin-walled castings because of its high carbon content, close to eutectic composition, low melting point, good fluidity and small shrinkage. In addition, graphite is easily broken during cutting, and the workability of gray cast iron is better than that of steel.

agricultural machinery casting hot finishing process:

Mechanical casting products are large castings, which need to improve their ability and improve the internal quality of cast iron castings through thermal finishing. Thermal finishing of metal materials is one of the key processes in mechanical manufacturing. Thermal finishing generally does not change the shape and overall chemical composition of the casting, but only changes the internal microstructure of the casting or changes the chemical composition of the casting surface, thereby improving or improving the characteristics of the casting. Its characteristic is to improve the internal quality of castings.

In order to provide the mechanical, physical and chemical capabilities of metal castings, in addition to the proper selection of materials and various forming processes, a thermal finishing process is usually required. Steel is widely used in the machinery industry. The microstructure of steel is complex and can be controlled by thermal finishing. Therefore, the thermal finishing of steel is the main content of metal thermal finishing. In addition, aluminum, copper, magnesium, titanium and their alloys can change mechanical, physical and chemical capabilities through thermal finishing to obtain a variety of capabilities.

Integral thermal finishing is a metal thermal finishing technique that heats the entire casting at an appropriate rate, thereby changing the overall mechanical capabilities of the casting. There are four basic processes in the overall thermal finishing of steel: annealing, purification, quenching and tempering.

The simple and effective method of agricultural machinery castings is to sort the surface of the castings into dust, expose the anti-rust, guide rails, fixtures, etc. to the outside and moving parts, and coat them with anti-rust oil. Do not use sweaty hands when applying anti-rust oil. Otherwise the fingerprints will rust. You can use the brush directly. Cover the equipment with a cloth to prevent the anti-rust oil from absorbing dust. The inner surface and inner cavity of the cast iron platform shall be brushed or sprayed with anti-rust oil, and the outer seal shall be maintained. If it is operated without leveling, it will be deformed for a long time and the casting cannot be measured. Correct method: adjust the CNC board before use and then operate.