In the heat treatment, after some crossed tapered roller bearing rings with larger outer diameters are quenched by different heat treatments, this deformation will occur, so why do we have the deformation of the rings? What is the problem-solving management solution? The following is a cross-tapered roller bearing factory to introduce the causes and solutions of heat-treatment deformation of cross-tapered roller bearing sleeves!
1. Heat treatment deformation
During the heat treatment of tapered roller bearings, there are thermal and structural stresses. These internal stresses can be superimposed on each other or partially canceled, which is variable because they can vary with heating temperature, heating rate, cooling type, cooling rate, shape and size of parts, so heat treatment deformation is inevitable. Understanding and mastering its changing laws can make the bearing parts in a controllable range, which is beneficial to the production. Of course, the mechanical collision during the development of heat treatment will also cause the parts to deform, but this structural deformation can be reduced and avoided with some improved technical operations.
2. The main reasons for heat treatment deformation of cross tapered roller bearings
One of the main reasons for the deformation of the transverse tapered roller bearing range is the heat generated by heating and cooling during heat treatment and the large tissue stress. When the overall plastic deformation of the sleeve occurs, the deformation is manifested as small bulge in the diameter direction; when local plastic deformation occurs, it manifests as a graphic or cylindricity error. Since the cooling treatment speed of quenching oil is fast, it can not exceed the heating reaction speed of the sleeve in the heating furnace. At the same time, the rigidity of the tapered roller bearing ring is poor, so most of the parts that can be deformed are in the cooling process. produced in.
3. Solutions for heat treatment deformation of cross tapered roller bearings
During the heat treatment process, there are many factors that affect the deformation of the transverse tapered roller bearing sleeve. By reducing thermal stress and tissue stress during heat treatment, the deformation of the bushing can be reduced. From the point of view of the heat treatment process, by reducing the quenching temperature, such as the cross-tapered roller bearing ring with a larger outer diameter, by properly controlling the holding time, increasing the temperature of the quenching oil, and reducing the stirring speed of the quenching oil, the sleeve can be effectively reduced. Tube deformation. Due to the difference in its own stiffness, heat treatment may produce large deformation under certain thermal stress and tissue stress. Therefore, in order to control its deformation, it is necessary to formulate a suitable heat treatment process to control thermal stress and tissue stress.
