Self-aligning roller bearing bainite isothermal quenching equipment

Bearing durable - at ease Self-aligning roller bearing electricity department author for your explanation: spherical roller bearing bainite isothermal quenching equipment according to the characteristics of the spherical roller bearing processing, the equipment is mainly used by two broad categories: automatic production line and cycle of furnace. （ 1) Less varieties of automatic production line, large batch of bearing is suitable for automatic production, such as the production more use of railway bearing automatic production line. Automatic production line is mainly composed of protective atmosphere furnace and isothermal quenching tank, isothermal quenching of transport equipment used by the action of artifacts and can be divided into three categories: rotary hearth type, disc and conveyor. Lin company developed rotary hearth type by love, push the disc isothermal quenching equipment is pushed the bottom or placed in the salt bath isothermal plate group, workpiece according to certain rhythm in and out, memory control order discharging, action is controlled by PLC program. This kind of equipment automation degree is high, but large investment. （ 2) Isothermal quenching equipment cycle type rolling mill bearings due to many varieties, small batch, many small and medium-sized rolling mill bearings manufacturers using box-type furnace or pit type furnace + + + isothermal quenching cooling groove groove cleaning tank, also there are more than using box-type furnace + isothermal bath. The configuration of less investment, high applicability, but the intensity of labor is big, poor safety. At present, the bainite isothermal quenching at promoting alternative to bainite isothermal quenching carburizing steel used on smaller mill load bearing has been successfully applied in our country. 4. Protective atmosphere and control with the improvement of surface quality of workpieces after quenching, protection ( Controlled) Atmosphere heating is more and more popular, including annealing heat treatment adopt protection ( Or controlled) Heating atmosphere. In the 1970 s, mainly USES the endothermic atmosphere. Endothermic atmosphere is the raw material of gas and air mixed gas under the action of catalyst, form a containing part of reaction? ( CO） 18% ~ 23%,? ( H2） 37% ~ 42%, allowance for the protection of N2 atmosphere, this atmosphere and application in the field of bearing heat treatment in our country. Nitrogen-based atmosphere of propane in bearing heat treatment quenching line, the most widely used in the field of the nitrogen methanol atmosphere components and endothermic atmosphere, with n - Methanol as a representative of nitrogen based atmosphere on the mesh belt furnace widely applied. Appeared in the 90 s, the air and hydrocarbon of direct access to higher than 800 ℃ the chamber of a stove or furnace gas method, namely direct raw atmosphere. Through the study found that the high the atmosphere of CH4 composition, although its gas reaction to reach similar to the degree of the balance of heat absorption type atmosphere, but its carbon transport capacity or by the content of CO and H2 atmosphere control, control the carbon potential by oxygen probe combined with CO2 analyzer is achievable. Direct raw atmosphere is the main advantage is that a large number of saves raw material gas consumption, according to statistics, the atmosphere is used in intermittent furnace atmosphere or continuity on the furnace atmosphere, the feed gas consumption cost savings can be up to 70%. Today, around the world have more than 300 sets the mood atmosphere furnace used for carburizing and carbonitriding and protective atmosphere heat treatment quenching, etc. Direct raw atmosphere in more applications in the field of carburizing bearing field in our country. Self-aligning roller bearing bainite isothermal quenching equipment: in recent years, the actual application shows that the service life of the oxygen sensor is not good, oxygen probe to measure carbon potential difference between the actual value is unpredictable. Therefore, controlled atmosphere sometimes because of oxygen sensor failure and uncontrolled, cause defects such as decarburization oxidation. Regularly check the accuracy of measurement is often used at the present stage in China, is not conducive to the furnace to achieve full automation, sometimes even affect the normal production. For these reasons, the foreign developed a dual measuring system, one of the standard oxygen probe used in the normal control of carbon potential, another independent measuring system is used to test the working condition of the oxygen sensor, namely the two system measured the carbon potential of atmosphere, when the results appear large deviation, will report to the police. The second measurement system components can be CO2 infrared analyzer, can also be a miniature oxygen probe ( λ The probe) 。 So far, there have been many atmosphere furnace installed this dual measuring system. Throughout the whole, the domestic bearing heat treatment technology and equipment in the developed countries also has the very big distance, especially on annealing equipment gap bigger. Bearing heat treatment technology and equipment compared to other industry also has a certain distance, improve the quality of bearing is related to the revitalization of China's equipment manufacturing industry. Bearing comfortable and durable, )