This centerless grinding machine is suitable for centerless grinding of various cylindrical parts, annular parts and long bar pieces (special devices need to be installed), also suitable for centerless cutting and grinding of cones with conicity less than 1: 20 and various shaped rotary parts, and can realize semi-automatic cycle operation. Combined with loading and unloading mechanisms (special order), automatic circular grinding can be realized, which is suitable for mass production.
I. Structural Characteristics and Performance of Machine Tools
1. The grinding wheel is of cantilevered structure. The spindle of grinding wheel adopts a five-piece short bearing bush dynamic-pressure sliding bearing.
2. The guide wheel is of cantilevered structure, and its spindle bearing is a 1:30 integral sliding bearing.
3. The guide wheel frame adopts hydrostatic guide rail, which can be moved quickly, and can realize micro feeding, with certain shock resistance. The guide rail is not easy to wear.
4. Variable speed of guide wheel adopts AC frequency conversion to realize stepless speed change.
5. The reciprocating movement of trimming machines for both grinding wheel and guide wheel adopt hydraulic transmission, stepless speed regulation.
6. The machine tool is equipped with automatic cutting and grinding device, which enables semi-automatic cycle work.
II.Technical Parameters
| Diameter of grinding | Through-feed grinding | 10～100mm |
| In-feed | 10～100mm | |
| Max grinding length（standard bracket） | Through-feed grinding | 210mm |
| In-feed | 195mm | |
| Specification of grinding wheel | P500x200x305mm | |
| Specification of guide wheel | PDA350x200x203mm | |
| Rotation speed of grinding wheel | 1250r/min | |
| Rotation speed of guide wheel (stepless speed) | 10～200r/min | |
| Rotation angle of guide wheel | In vertical plane | -2°～+5° |
| In horizontal plane | 0°～+3° | |
| Feed rate of feed hand wheel per division | 0.002mm | |
| In-feed travel amount | Total stroke volume | 3.5mm |
| Fast speed stroke volume | 2～3.5mm | |
| Low speed stroke volume | 0～1.5mm | |
| Distance from the center of grinding wheel and regulating wheel to the bottom surface of bracket | 255mm | |
| Total power（22.46KW） | Motor for grinding wheel | 18.5KW |
| Motor for guide wheel | 3KW | |
| Hydraulic motor | 0.75KW | |
| Lubrication motor | 0.09KW | |
| Cooling motor | 0.12KW | |
| Power source | 3N～50Hz 380V | |
| Machine tool’s overall dimension | 2675x1505x1615mm | |
| Net weight of machine tool | 5000kg | |
| Work accuracy (Standard test piece Φ20x120mm,45# steel) |
Roundness | 0.002mm |
| Cylindricity | 0.002mm | |
| Roughness | Ra0.32μm | |