There are three main grinding methods for centerless cylindrical grinders; through type, plunge type, plunge through one through type, and through type centerless grinding. The workpiece is fed along the axis of the grinding wheel for grinding. Adjust the slight inclination of the guide wheel axis to realize the axial feed of the workpiece. Suitable for grinding slender cylindrical workpieces. Short shafts and sleeve workpieces without center holes. Plunge type centerless grinding. There is an axial positioning fulcrum on the pallet, and the workpiece is supported on a certain position on the pallet, and is cut by a grinding wheel or a guide wheel for grinding. Used for grinding workpieces with shoulders or bosses and cones, spheres or other rotating workpieces. The plunge-through centerless grinding is a combination of the two. In addition, there are tangential feed grinding and end feed grinding that makes the stepped workpiece advance and retreat in the axial direction. Centerless cylindrical grinders have higher productivity. It is mostly used in mass production and is easy to realize automation.
Features of Centerless Cylindrical Grinding Machine The mechanism performance of centerless cylindrical grinder has the following characteristics compared with ordinary cylindrical grinder.
1. Continuous processing, no need to retract the tool, short copying time such as clamping the workpiece, and high productivity.
2. The support rigidity of the bracket and guide wheel positioning mechanism is better than that of ordinary cylindrical grinders and the center frame mechanism. The cutting amount can be larger, and it is beneficial to the processing of slender shaft workpieces, and it is easy to realize high-speed grinding and powerful grinding.
3. The workpiece of the centerless cylindrical grinder is positioned on the positioning mechanism by the outer circle, and the grinding amount is the margin on the diameter of the workpiece. Therefore, the wear of the grinding wheel, the compensation of the feed mechanism and the repeated positioning accuracy of the cutting mechanism have an impact on the diameter and size accuracy of the parts. Impact. Only half of the ordinary cylindrical grinder, no center hole is required, and it is easy to realize automatic loading and unloading.
4. Wide grinding wheel centerless grinding machine through-type mechanism can be used to increase the machining allowance each time, and it can grind complex profiles in sequence or multi-wheel grinding during plunge grinding, with high productivity and wide application range.
5. The centerless cylindrical grinder does not have a mechanism to ensure the relative position accuracy (coaxiality, perpendicularity, etc.) of the ground surface and the non-ground surface, and the roundness is poor when grinding the circumferential intermittent outer surface.
6. The grinding surface is prone to odd roundness. If it is larger, it will often cause the illusion that the measured size is smaller than the maximum physical size, which will affect the assembly quality and work performance.
7. The adjustment of the machine tool is more complicated and time-consuming, and it needs to be changed every time a workpiece with a different diameter is replaced
