Main USES and structural features of machine tools
• The machine is a two-axis CNC internal grinder, mainly used for grinding the workpiece's internal hole, step hole, internal taper hole, internal end face and external end face. The grinding cycle is completed automatically, including automatic feed and automatic back; Rough grinding, fine grinding; Automatic dressing grinding wheel, automatic compensation, interpolation correction and other functions.
• The layout of this machine tool is fixed by workpiece box, the table (Z-axis) reciprocates vertically, and the sand wheel slide (X-axis) gives transverse feed. Both X and Z axes are driven by servo motor to drive ball screw drive.
• The workpiece head bearing adopts high-precision double cylindrical roller bearing, the motor is driven by ac frequency conversion, and the workpiece speed is stepless regulated. The workpiece box is installed on the rotary plate of the bridge board; It can move and rotate laterally to meet the grinding needs of large aperture workpiece and workpiece with taper.
• The machine tool control system adopts German Siemens 828 CNC system. Grinding wheel spindle adopts high precision mechanical spindle, electric machine AC frequency conversion, sand wheel speed non-pole adjustment.
• The machine is equipped with a closed housing, a front rotary operating table, and a backpack-type electrical box.
Ii. Main specifications and parameters of machine tools
| number | name | Main technical parameters |
|---|---|---|
| 1 | Grinding bore diameter range | φ50 ~ 800mm |
| 2 | Maximum grinding bore depth | 800mm |
| 3 | Maximum turning diameter of workpiece (outside the casing） | φlOOOmm |
| 4 | Workpiece motor power | 5KW |
| 5 | Grinding wheel motor power | 5.5KW |
| 6 | X axis servo motor power | 20NM |
| 7 | Maximum X-axis stroke | 250mm |
| 8 | X axis feed velocity | 5m/min |
| 9 | Z-axis servo motor power | 30NM |
| 10 | Maximum Z stroke | 1000mm |
| 11 | Z-axis maximum velocity | lOm/min |
| 12 | X and Z axis servo motor resolution | 0.001mm |
| 13 | X axis positioning accuracy | 0.005mm |
| 14 | The X axis weight turned over the locating accuracy | 0.002mm |
| 15 | Z axis positioning accuracy | 0.01mm |
| 16 | Z axis heavy grip positioning accuracy | 0.004mm |
| 17 | Grinding head speed (stepless speed regulation) | 1000-6000r/min |
| 18 | Workpiece box turning Angle | 士1 0° |
| 19 | The workpiece speed | 10-200r/min |
| 20 | Total machine power | 22.8KW |
| 21 | Machine weight | 500KG |
| The machine bed fine degrees | ||
| 1 | Inner hole roundness | 3um |
| 2 | Cylindricity of bore | 5um |
| 3 | Inner bore surface roughness | Ra0.4um |
