What are the differences between the performance of centerless grinders and ordinary grinders?
Compared with ordinary grinders, the centerless grinder mechanism has the following characteristics:
1. Continuous processing, no need to retract the tool, short copying time such as clamping the workpiece, and high productivity.
2. The bracket and guide wheel positioning mechanism have better support rigidity than the top and center frame mechanism of ordinary grinding machines. The cutting amount can be larger, and it is conducive to the processing of slender shaft workpieces, and it is easy to achieve high-speed grinding and powerful grinding.
3. The workpiece of the 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 error of the cutting mechanism have an impact on the diameter and dimensional accuracy of the part. It is only half the size of an ordinary grinder, does not need to drill a center hole, and is easy to automate the loading and unloading of materials in advance.
4. The through-type mechanism can be used to increase the machining allowance each time. During plunge grinding, complex profiles can be ground in sequence or with multiple grinding wheels. It has high productivity and a wide range of applications.
5. There is no mechanism to ensure the relative position accuracy (coaxiality, perpendicularity, etc.) of the grinding surface and the non-grinding surface, and the roundness is poor when grinding circumferentially discontinuous outer surfaces.
6. The grinding surface is prone to produce odd-numbered edge roundness. If it is larger, it will often cause the illusion that the measured size is smaller than the larger physical size, which will affect the assembly quality and working performance.
7. Machine tool adjustment is complex and time-consuming. Every time a workpiece with a different diameter is replaced, the height, distance and related process parameters of the bracket need to be adjusted. Therefore, it is difficult to adjust the technology and is not suitable for small batch and single-piece production.