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+High Precision Double Grinding Head Series CNC Vertical Grinding Machines
The high precision double grinding head CNC vertical grinding machine of Minnuo, with its innovative stepped vertical wall structure, is specially designed for the precision machining of large disk and sleeve parts. The machine can realize all-round grinding of internal hole, external circle and end face in one clamping, which greatly improves the machining efficiency. Its high rigidity and high precision design meets the stringent requirements of the high-end market for fine machining.
- Max.swing diameter over machine bed : 1250/1600/2000/2500/3000mm
- Max.swing diameter over cutting tool carriage: 800/1250/1600/2000/2500mm
- Max.work-piece weight: 2/3T
- Max.work-piece length: 500/750mm
| Specification | Unit | MGK28100 | MGK28125 | MGK28160 | MGK28180 | MGK28200 | MGK28220 | |
| Basic parameter | Table diameter | mm | φ1000 | φ1250 | φ1600 | φ1800 | φ2000 | φ2200 |
| Max. workpiece rotation range | mm | φ1100 | φ1350 | φ1700 | φ1900 | φ2300 | φ2400 | |
| Max. workpiece height(maximum grinding depth) | mm | 500 | 500 | 500 | 500 | 550 | 550 | |
| Z-axis Travel | mm | 600 | 600 | 600 | 600 | 600 | 600 | |
| Inner hole grinding range | mm | φ50~φ200 (Hole depth≤200) | φ50~φ200 (Hole depth≤200) | φ50~φ200 (Hole depth≤200) | φ50~φ200 (Hole depth≤200) | φ50~φ300 (Hole depth≤200) | φ50~φ300 (Hole depth≤200) | |
| mm | φ200~φ1000 (Hole depth≤500) | φ200~φ1250 (Hole depth≤500) | φ200~φ1600 (Hole depth≤500) | φ200˜φ1800 (Hole depth≤500) | φ300~φ2000 (Hole depth≤550) | φ300~φ2000 (Hole depth≤550) | ||
| Outer grinding range | mm | ≤φ1100 | ≤φ1350 | ≤φ1700 | ≤φ1900 | ≤φ2100 | ≤φ2300 | |
| Table Loading Weight | kg | 2000 | 2500 | 3000 | 3000 | 5000 | 5000 | |
| Worktable | Rotary accuracy(axial/radial) | mm | 0.002 | 0.002 | 0.003 | 0.003 | 0.003 | 0.003 |
| Rotational speed | rpm | 60 | 60 | 50 | 50 | 40 | 40 | |
| Vertical spindle | Rotary accuracy(axial/radial) | mm | 0.002 | 0.002 | 0.002 | 0.002 | 0.002 | 0.002 |
| Variable frequency motor power | kw | 15 | 15 | 15 | 15 | 22 | 22 | |
| Max. speed | rpm | 7000 | 7000 | 7000 | 7000 | 3000 | 3000 | |
| Number of grinding shaft | PCS | 3 | 3 | 3 | 3 | / | / | |
| Horizontal spindle | Rotary accuracy(axial/radial) | mm | 0.002 | 0.002 | 0.002 | 0.002 | 0.002 | 0.002 |
| Variable frequency motor power | kw | 11 | 11 | 11 | 11 | 11 | 11 | |
| Max. speed | rpm | 2500 | 2500 | 2500 | 2500 | 2000 | 2000 | |
| Positioning accuracy | Servo Axis Positioning Accuracy | mm | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 |
| Servo Axis repeated positioning accuracy | mm | 0.006 | 0.006 | 0.006 | 0.006 | 0.006 | 0.006 | |
| Machining accuracy | Roundness | mm | 0.002 | 0.002 | 0.003 | 0.003 | 0.003 | 0.003 |
| Cylindricity | mm | 0.004 | 0.004 | 0.004 | 0.004 | 0.004 | 0.004 | |
| Machine weight | Gross weight | kg | 28000 | 30000 | 40000 | 45000 | 55000 | 58000 |
| Total power | kw | 70 | 70 | 100 | 100 | 110 | 110 | |
| Floor area | Length x width x height | mm | 7×4×4 | 8×4×4 | 8×4.5×4 | 8×4.5×4 | 9×7×5 | 9×7×5 |
Features
- High-strength base design: overall square structure with multi-layer mesh rib layout inside ensures high rigidity and stability of the machine.
- Column beam structure: High-strength wall plate design, full circumferential contact between the beam and the base, providing excellent contact rigidity and stability.
- Table drive system: torque motor direct drive, realizing infinite speed regulation, with Heidenhain angle encoder for non-circular grinding.
- High precision spindle system: Closed hydrostatic spindle design ensures high precision and rigidity of the rotary table spindle.
- Guideway and slide configuration: X-axis (lateral movement of the grinding head) adopts large-size double wire rails and several heavy preload slides, while Z-axis (vertical movement of the grinding head) uses medium-size wire rails and heavy preload to ensure high load capacity and fast response.
- Servo motor system: XZ axis are equipped with high power servo motors to provide fast response speed.
- Scale Configuration: X-axis is equipped with scale as standard, Z-axis can be equipped with optional scale to further improve positioning accuracy.
- Spindle layout: left and right side arrangement, the left side of the vertical spindle, the right side of the horizontal spindle, you can choose double vertical spindle.
- Spindle type: Rolling bearing electric spindle and dynamic and static pressure spindle are available. The standard configuration is rolling bearing electric spindle, which is suitable for high-speed grinding; dynamic and static pressure spindle is suitable for precision grinding.
- Bearing and Accuracy: Rolling bearing spindles are equipped with NSK precision bearings, with a spindle accuracy of 0.002mm; hydrostatic spindles have an even higher accuracy of 0.001mm.
- Cooling system: All spindles are equipped with oil coolers to ensure stable spindle operation.
Applications
- Double grinding head CNC vertical grinding machine can meet the demand for precision machining of large disk and sleeve parts, and can complete the grinding of internal hole, external circle, end face, crankshaft, gears, etc. in one clamping.
- It is widely used in wind power, aerospace, machine tool spindle and precision gauge industries.
Standard Accessories
- Closed hydrostatic turntable
- X-axis scale
- Siemens 828D system
- Linear guide, ball screw lubrication device
- Air filtration unit
- Single point diamond pen dresser
- Totally enclosed protection device
- Grinding wheel spindle (oil cooler)
- High-torque permanent magnet (with water cooler)
- Rotary hydraulic station (oil cooler)
- Electrical cabinet (including air conditioner)
- Cooling water tank for magnetic reels
- Grinding wheel flange and balancing frame
- Water gun, air gun
Optional Accessories
- Roller Dresser
- Semi-closed protection
- Air traffic control
- Automatic measuring devices
- Electro-permanent magnetic suction cups
- Arc trimmers
- Z-axis scale
- Oil mist device
Detailed drawings
Workpiece Case
Precision gauge workpiece
The pull & push device is installed on the ma-chine rotation part (such as chuck and motor)to prevent the fall off of work-piece due to centrifugal force, and ensure the machine and operator’s safety. This design meets with safety standard of machine design.
Machine tool spindles
The pull & push device is installed on the ma-chine rotation part (such as chuck and motor)to prevent the fall off of work-piece due to centrifugal force, and ensure the machine and operator’s safety. This design meets with safety standard of machine design.
Turntable bearing
40Cr forged and ground gears are used in the headstock with 4 gear shifts speed regulation.All shafts are spline structure with tight fit. The bearings come standard with high precision brands.. The gear meshes with high accuracy and low noise.
Certified Quality
We are fully committed to the highest standards of quality for our development andmanufacturing processes as well as to preserving the environment. Our products haveobtained a number of domestic and foreign authoritative certifications.
Get In touch
(+86) 13295238763
24 hours online service
Address No. 2 Xintai Road, Economic and Technological Development Zone Jingjiang City Jiangsu Province, China
Email cncitd@minnuo.com