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Indexer cam carburizing-globoidal cam indexing drives

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Update time : 2019-08-18 21:28:39
In order to increase the strength and hardness of the main transmission components in the indexer, the wear resistance effect is obtained, and the service life of the indexer is ensured. Usually the cam material in the indexer is treated by high temperature carburizing technology to achieve the hardness of the material.
So what is the high temperature carburizing technology of the indexer cam? Refers to the process of infiltrating carbon atoms into the steel surface layer. In general, the low carbon steel workpiece has a surface layer of high carbon steel, and after quenching and low temperature tempering, the surface layer of the workpiece has high hardness and wear resistance, while the central portion of the workpiece still maintains low carbon steel. Toughness and plasticity.
globoidal cam indexing drives
The material of the indexer cam is generally carbon steel or carbon alloy steel. After high temperature carburization, the chemical composition of the cam surface can be close to high carbon steel. After the workpiece is carburized and then quenched, high surface hardness, wear resistance and fatigue strength can be obtained, and the toughness of the low carbon steel after quenching is maintained, so that the cam can withstand the impact load. The indexer cam must pass the high temperature carburizing technology to meet the hardness requirements.
The carburizing technology of the indexer cam is divided into three processes: 1. Decomposition, mainly the decomposition of the carburizing medium to produce activated carbon atoms. 2. Adsorption, after the activated carbon atoms are absorbed by the surface of the steel, dissolve into the surface austenite, so that the carbon content in the austenite increases. 3. Diffusion, the surface carbon content increases and the concentration of carbon in the heart appears, and the carbon enthalpy on the surface diffuses into the interior. The diffusion rate of carbon in steel depends mainly on the temperature, and is related to the difference between the internal and external concentrations of the infiltrated elements in the workpiece and the content of alloying elements in the steel.
The surface microstructure of the indexer cam material after carburizing and quenching is mainly high hardness martensite plus retained austenite and a small amount of carbide, and the core structure is low-carbon martensite with good toughness or contains non-Martens. The body structure, in general, the depth of the carburized layer is 0.8-1.2 mm, and the depth of carburizing can reach 2 mm or more. The surface hardness can reach HRC58-63, and the core hardness is HRC30~42. After the carburizing and quenching of the indexer cam, the compressive internal stress is generated on the surface of the material, which is beneficial to improve the fatigue strength of the workpiece. Therefore, after high-temperature carburizing technology, the indexer cam has the characteristics of high strength, high impact toughness and wear resistance, thereby ensuring the service life of the indexer.