How to effectively improve the machining accuracy of bearing grinders?

The impact of process system issues on machining accuracy is an important factor in the machining process of components. Once a problem occurs, the machining accuracy will also decrease. Firstly, there is a process issue. If the process application is unreasonable or the heat generated during the processing affects the process, it will cause deviations in the processing technology, leading to processing errors. In addition, residual stress on the workpiece may also cause deformation, resulting in accuracy errors1. The rotational accuracy of the grinding wheel spindle refers to the radial runout and axial displacement of the grinding wheel spindle end. The radial runout and axial displacement tolerance of the grinding wheel spindle of a typical grinder is 0.003 mm. The grinding wheel spindle drives the grinding wheel to rotate at high speed to complete the main motion of grinding. Therefore, the rotational accuracy of the grinding wheel spindle can directly affect the surface roughness of the workpiece<2. The rotational accuracy of the headstock spindle is used to drive the workpiece for circular feed forming motion, so the error of its rotational motion on the grinder will be reflected on the machining surface. The radial runout of the grinding machine clamp spindle can cause roundness errors on the machined surface. The movement of the headstock spindle can cause axial circular runout errors on the surface of the workpiece<3. The linear motion accuracy of the worktable will directly affect the machining accuracy. Due to its straightness error in the vertical plane, it will be manifested as a change of 8 degrees in the center of the workpiece on the grinder, causing a change in the diameter of the workpiece and affecting the straightness of the surface contour of the workpiece. At the same time, it will also produce errors in the cylindricity of the workpiece1. Controlling the original error of CNC machine tools can improve machining accuracy by improving the geometric accuracy of the machine tools used to process parts, improving the accuracy of measuring tools, fixtures, and themselves, controlling the errors caused by thermal and stress deformation of the process system, minimizing tool wear, deformation errors caused by internal stress, and reducing measurement errors, all of which can directly reduce the original error of the workpiece<2. Original error compensation method: Most of the original errors are difficult to completely eliminate, so original error compensation can be processed here. This scheme compensates for the inherent original errors in the original process system caused by human error, thereby reducing machining errors and improving equipment machining accuracy<3. Transfer error, as the name suggests, refers to the transfer of machining errors to other aspects that do not affect machining accuracy. Generally, when machining errors occur or thermal deformation errors are accepted in production equipment, if they are transferred to non sensitive directions of machining errors, the machining accuracy can be greatly improved without affecting the equipment accuracy