Heat Treatment for the Slewing Bearing

The processing link that the slewing bearing is absolutely inseparable from when it is working is thermal processing, because if the pulley part of the slewing bearing is in poor operation, it must be thermally processed first, so as to better maintain the normal operation of the slewing bearing. After all, the slewing bearing When in use, the pulley part is an important part that can effectively carry all objects, so we must pay attention to many aspects when dealing with the hot processing link, so today we are here for you to carry out the hot processing link of the slewing bearing. Notes are described in more detail.

Generally, when the slewing bearing is hot processed, the relevant correct operation procedures must first be carried out.

The normal process steps are: forging→roughing→quenching and tempering→finishing→raceway surface flame surface quenching→raceway surface grinding and other processes. One of the raceway surfaces is flame quenched to form a soft band. The so-called soft belt is the area that has not been heat treated. The formation of the soft belt is necessary for the heat treatment process. In the final heat treatment process, since the diameter of the raceway circle of the slewing bearing is relatively large, flame surface quenching is usually used. The method is to use acetylene to heat the surface of the workpiece to be hardened and then add water. Cooling, this process is done continuously. The heated flame gun and water gun are mounted together while making a circumference along the circle of the workpiece. In the final heat treatment process, since the diameter of the raceway circle of the slewing bearing is relatively large, flame surface quenching is usually used. The method is to use acetylene to heat the surface of the workpiece to be hardened and then add water to cool it. The heated flame spray gun and water gun are mounted together while making a circular motion along the circle of the workpiece.

When the movement is close to 360 degrees, the heating and water spray are stopped immediately. That is, the circular areas of heating and water spray do not overlap. Cracks in the workpiece can occur if the circle areas where the heating and water spray occur overlap (heat treatment at an angle greater than 360 degrees on the circle). The tangential width of the unheated area is typically 15 mm. This 15mm area is called the soft belt in the slewing ring. In English, it is often SOFT ZONE. Under normal circumstances, the steel character "S" is typed on the position where the soft belt exists in the workpiece to indicate the specific soft belt position. Imported or domestic regular products usually have this very important mark.

For the relevant precautions of the slewing bearing in the hot working process, this is the same as the relevant introduction we have made for you above, so we must pay attention and pay attention to it uniformly. Thus, the correct operation of the pulley part of the slewing bearing is effectively ensured.