High Precision External And Internal Grinding Machine
Based on our years experience over designing and manufacturing CNC grinding machines.
GK30 series high precision externaland internal grinding machine is a high grade CNC machine tool , innovated and developed by our company with proprietary intellectual property rights. With advanced flexible complex processing technology adopted, the machine tool is of multiple grinding wheel combination type formed in series. Within one clamping, different parts of a work-piece such as cylindrical and internal surface, end face, conical surfacenon-round face and curved surface can be finished simultaneousy, As a result, the traditional process method to arind a work-piecewith multiple machine tools in sequence is totaly substituted. The machine tool features on high processing precision, efficiency and fexibility and is suitable for precision machining operations in military industry, aviation, shipbuilding, electronics, cutter, measuring equipment, machine tool, automobile and many other fields.
Feature
- With a rational layout and integral protective cover, the machine tool is convenient for maintenance and in conformity withhuman engineering requirements.
- Integrated hydrostatic, hydrodynamic and electrically operated spindle in wheel head, external grinding wheel, end facecylindrical grinding wheel and internal grinding wheel can be arranged simultaneously. With the combination of above grindingwheels, the process demand of users will be maximally met.
- Up to four axes controlled by CNC system (two linear axes and two revolving axes), multiple process quick and fexible grindingoperation can be realized.
- Linear electric motor (or servo motor) + cosed high precision guide way are adopted for the movement of wheel head (X-axis), sothe accuracy, sensitivity and high responsiveness of feeding are ensured in the grinding operation. Equipped AC servo motor andball-screw driving system for the movement of worktable (Z-axis); torque motor (or servo motor) is used for the rotation of wheelhead (B-axis) in which its positioning accuracy reaches +2.5″, the accurate transposition of multi grinding wheel is ensuredmeanwhile, the interlink movement of X-Z-B axis and profiled cylinder (curved surface) grinding also can be realized.
- Adopted torque motor, angle encoder drive mode and high precision roling bearing shafting in the workpiece rotation system(C-axis), high rotation accuracy and dyamic response are obtained. By the interlink movement of C-X axis, non-circular andeccentric circle grinding are also achieved ; Grinding of cylingrical surface can also be carried out by employing servo motor (or 3phase AC motor) driving , and roling bearing spindle system (or highprecision dynamic pressure spindle with high rotatingprecision)
- Multi type diamond dresser (installed behind the workhead) can be selected, thus the accurate CNC dressing andauto-compensation is realized.
- Active measuring device can also be selected to realize , fully closed-loop controlling high precision grinding operation
Specifications
| Specifications | Unit | GK3012 | GK3032 |
| Distance between Centers | mm | 500 | 1000 / 1500 |
| Height of center | mm | 160 | 180 |
| Maximum grinding diameter | mm | Φ200 | Φ320 |
| Range of internal grinding | mm | Φ13 – Φ80 | Φ16 – Φ125 |
| Maximum workpiece weight between centers | kg | 50 | 150 |
| Control System | Domestic/Imported | Domestic/Imported | |
| Number of grinding wheels deployed | Three (cylindrical grinding wheel, end face grinding wheel and internal grinding wheel) | Three (cylindrical grinding wheel, end face grinding wheel and internal grinding wheel) | |
| Wheel head (X axis) – Feed speed | mm/min | 0.1 – 5000 | 0.1 – 5000 |
| Wheel head (X axis) – Minimum setting unit | mm | 0.0001 | 0.0001 |
| Worktable – Type | Two layer conical degree adjusting worktable | Two layer conical degree adjusting worktable | |
| Worktable – Feed speed | mm/min | 0.1 – 5000 | 0.1 – 5000 |
| Worktable – Minimum setting unit | mm | 0.0001 | 0.0001 |
| Work head – Center | MT.NO.4 / MT.NO.5 | MT.NO.4 / MT.NO.5 | |
| Work head – Rotating speed | r/min | 30 – 300(stepless) | 30 – 300(stepless) |
| Tailstock – Center | MT.NO.3 / 4 | MT.NO.4 | |
| Tailstock – Travel of center sleeve | mm | 35（ manual）/ 60（ hydraulic） | 35（ manual）/ 60（ hydraulic） |
| Net weight | kg | 6500 | 12000 / 14000 |
Working accuracy (standard test specimen)
| Inspection Item | GK302 / GK3032 |
| Roundness（grinding between centers / grinding on chuck） | 0.0004 / 0.001 mm |
| Consistency of the longitudinal section diameter | 0.002 mm |
| Roughness | Ra 0.02μm Corundum grinding wheel |