What are the machining characteristics of centerless cylindrical grinder?

There are three main grinding methods for centerless cylindrical grinder; Pass-through, cut-in, cut-in and pass-through centerless grinding. The workpiece is fed along the axis direction of the grinding wheel for grinding. Adjust the slight inclination angle of the guide wheel axis to realize the axial feed of the workpiece. Suitable for grinding slender cylindrical workpieces. Short shaft and sleeve workpiece without central hole, etc. Cutting centerless grinding. There is an axial positioning fulcrum on the tray, and the workpiece is supported at a certain position on the tray and ground with a grinding wheel or guide wheel. Used for grinding workpieces with shoulders or bosses, as well as conical, spherical or other rotating workpieces. Through centerless grinding is a combination of the two. In addition, there are tangent feed grinding and end feed grinding, which make the workpiece advance and retreat in the axial direction. The centerless cylindrical grinder has high productivity. It is mostly used for mass production and easy to realize automation.

Characteristics of centerless cylindrical grinder Compared with ordinary cylindrical grinder, the mechanical performance of centerless cylindrical grinder has the following characteristics:

1, continuous machining, no tool withdrawal, short copy time of clamping workpiece and high productivity.

2. Compared with the common cylindrical grinder and the center frame mechanism, the bracket and the guide wheel positioning mechanism have better supporting rigidity and larger cutting capacity, which is beneficial to the processing of slender shaft workpieces and easy to realize high-speed grinding and strong grinding.

3. The workpiece of the centerless cylindrical grinder is positioned on the positioning mechanism through the excircle, and the grinding amount is the allowance on the diameter of the workpiece, so the wear of the grinding wheel, the compensation of the feeding mechanism and the repeated positioning accuracy error of the cutting mechanism affect the diameter and dimensional accuracy of the part. It's only half that of ordinary cylindrical grinder, and it doesn't need to drill a central hole, so it's easy to automatically load and unload in advance.

4. The wide grinding wheel centerless grinder adopts a straight-through mechanism, which can increase the machining allowance each time. When cutting and grinding, it can grind complex surfaces in turn or with multiple grinding wheels, with high productivity and wide application range.

5. The centerless cylindrical grinder has no mechanism to ensure the relative position accuracy (coaxiality, verticality, etc.). ) between the grinding surface and the non-grinding surface, the roundness is poor when grinding the circumferential intermittent outer surface.

6, grinding surface is easy to produce odd roundness, if 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 working performance.

7. The adjustment of machine tools is complicated and time-consuming. Every time a workpiece with different diameters is replaced, it is necessary to adjust the height, distance and related process parameters of the bracket. Therefore, it is difficult to adjust the process, which is not suitable for small batch production.