This machine tool is applicable for centerless through-feed grinding of various cylindrical and annular parts and centerless in-feed grinding of cone shaped parts with conicity less than 1:20 and formed rotational parts. It can also realize semi-automatic in-feed grinding circulation. Through-feed grinding of long and thin rod material is available with material feed frame (special ordering). This machine tool is applicable for mass production.
I. Structural Characteristics and Performance of Machine Tools
1. The layout of the machine tool shall adopt double-side moving method of the
abrasive wheels and guide wheels. It can be equipped with automatic material
loading and unloading device;
2. Abrasive wheel shaft and guide wheel shaft is of the double-supporting structure. The front and rear bearings all adopt multi-piece dynamic pressure bearing with forced lubricating of live oil, which can meet the requirements on precision and heavy-load grinding;
3. The abrasive wheel frame adopts flat V-shaped thin membrane feedback type liquid hydrostatic guide rail with good vibration resistance and micro-feed sensitivity;
4.The in-feed mechanism adopts hydraulic mechanical type continuous speed change feed (decrease progressively);the in-feed volume can reach 4mm which is applicable for in-feed grinding of large shoulder and parts with large allowance;
5. Feed of abrasive wheel frame and abrasive wheel dressing adopts hydraulic mechanical type tracing compensation mechanism; the machine tool has compensation and dressing function at regular time;
6. The guide wheel adopts frequency conversion steeples speed regulation of AC motor;
7. The machine tool adopts PC control with interlock protection;
8. The user may choose loading and unloading mechanism (special ordering) to realize automatic through-feed grinding and in-feed grinding circulation.
II. Technical Parameters
Diameter of grinding | Through-feed grinding | 10~200mm |
In-feed | 10~200mm | |
Max grinding length(standard bracket) | Through-feed grinding | 300mm |
In-feed | 390mm | |
Specification of grinding wheel | P600×400×305mm | |
Specification of guide wheel | P350×400×203mm | |
Rotation speed of grinding wheel | 1330r/min | |
Rotation speed of guide wheel (stepless speed) | 12~200r/min | |
Rotation angle of guide wheel | In vertical plane | -2°~+5° |
In horizontal plane | -2°~ +3° | |
Total feeding stroke of grinding wheel frame | 165mm | |
Quick advancing and retracting of the abrasive wheel | 20~40mm | |
In-feed of the abrasive wheel | 0~4mm | |
Feeding rate per graduation in scale of grinding wheel frame’s hand wheel | 0.001mm | |
Distance from the center of grinding wheel and regulating wheel to the bottom surface of bracket | 270mm | |
Total power (34.39)kw | Motor for grinding wheel | 30kw |
Motor for guide wheel | 3.0kw | |
Hydraulic motor | 0.75kw | |
Lubrication motor | 0.09kw | |
Cooling motor | 0.55kw | |
Power source | 3N~50HZ 380V | |
Machine tool’s overall dimension | 3670mm×1850mm×1720mm | |
Net weight of machine tool | 10000kg | |
Work accuracy (Standard test piece Φ30x200mm,45# steel) |
Roundness | 0.002mm |
Cylindricity | 0.003mm | |
Roughness | Ra0.32um |