1. Especially suitable for grinding large nuts. It can be applied to dressing of grinding wheels with complex shapes and adapting to different specifications of steel balls.
2. Double grinding wheels compound grinding technology, one clamping can realise the compound processing of outer circle, end face and inner thread of ball nut;
3. Full closed-loop control system, online automatic measurement, can automatically measure the position of ball nut reverser hole;
4. Grindable large external diameter: Φ150mm; internal thread diameter: Φ20-Φ100mm, length: 200mm;
There are two ways of nut raceway grinding wheel correction: one is to adopt moulding diamond roller, each specification steel ball, with one kind of diamond roller. One is to use disc-shaped diamond roller (SMK203 does not have this function), using X and W axis CNC interpolation correction, a disc wheel can be adapted to all specifications of steel ball, especially suitable for large nut grinding. It can be applied to grinding wheels of any shape.
This machine tool is used for grinding the internal threads, outer circles and end faces of workpieces.
1. This machine tool is used for grinding the internal threads, outer circles and end faces of workpieces.
2. The machine tool features a T-shaped flat bed structure. The bed is made of high-quality inoculated cast iron, which has excellent vibration damping capacity. The X-axis screw guide and Z-axis screw guide are arranged onthe bed. THK ball screws and THK linear guides are adopted, and the Xand Z axes are perpendicular to each other. The bed is fixed on a cast ironbase. The large-inclined-plane cast iron base is used to facilitate chip removal.
3. The machine tool is equipped with a servo-controlled electric spindle as the workpiece spindle, which is fixed on the Z-direction slide. A diamond pen dresser is also fixed on the Z-direction slide. A frequency-controlled internal hole grinding spindle and a frequency-controlled outer circle and end face grinding spindle are fixed on the X-direction slide. The diamond roller spindle is installed on the marble bed, and the dressing amount of the grinding wheel can be automatically compensated.
4. The workpiece spindle is an electric spindle directly driven by a built-in synchronous motor, and a Heidenhain hollow shaft encoder is used on the electric spindle. The workpiece spindle is equipped with a rotary oil cylinder and a hydraulic chuck to automatically clamp the workpiece.
5. The diamond pen dresser can shape the outer circle and end face grinding wheel. The outer circle and end face grinding share one grinding spindle. The diamond roller dresser can shape the internal thread grinding wheel.
6. The machine tool is equipped with a measuring device to measure the starting position of internal thread grinding.
7. All electric spindles on the machine tool are controlled by constant temperature cooling to ensure that the spindles and motors operate at a constant temperature. Meanwhile, it reduces the thermal deformation of the workpiece, bed and worktable caused by the thermal radiation and heat conduction of various heating devices on the machine tool. Each hydraulic pipeline on the machine tool is equipped with a pressure or flow detection device to ensure the protection of the electric spindles, guides and motors on the machine tool in case of failures of the cooling or pressure devices.
8. The electrical cabinet is cooled by an air conditioner to ensure that the high-power drive components in the electrical cabinet can work normally within the allowable temperature range.
9. The machine tool is provided with a fully enclosed protective cover and a manually controlled protective door. An oil mist absorber is used to automatically absorb the oil mist to ensure the air quality in the workshop
| Item |
Details |
Unit |
Parameters |
Processing
Capacity |
Grinding internal thread diameter |
mm |
Φ30-120 |
| Grinding internal thread length |
mm |
250 |
Processing
Accuracy |
Grindable internal thread helix angle |
Degree |
Right 25°,Left 25° |
| Dimensional tolerance |
mm |
0.008 |
| Roundness |
mm |
0.008 |
| Cylindricity |
mm |
0.008/150 |
| Deviation in one pitch (trapezoidal internal thread) |
mm |
0.005 |
| Deviation in 25mm length |
mm |
0.0008 |
| Cumulative deviation over the full length |
mm |
0.010 |
| Thread pitch diameter consistency error |
mm |
0.012 |
| Surface roughness |
μm |
Ra≤0.4 |
Internal Thread
Grinding Wheel Spindle |
Maximum spindle speed |
min-¹ |
12000 |
| Rated power |
KW |
20 |
| Outer diameter of spindle sleeve |
mm |
φ170 |
External Grinding
Wheel Spindle |
Rated spindle speed |
min-¹ |
1270 |
| Rated power |
KW |
5.5 |
| Grinding wheel size (outer diameter×inner diameter×thickness) |
mm |
Φ350×Φ127×40 |
Diamond Roller
Spindle |
Roller size (outer diameter×inner diameter×thickness) |
mm |
φ100×φ25×30 |
| Maximum spindle speed |
min-¹ |
10000 |
Workpiece
Spindle |
Spindle speed |
min-¹ |
0-100 |
| Rated torque |
Nm |
64 |
| Rated power |
KW |
11 |
| Minimum angular unit |
Degree |
0.001 |
| Linear axis |
Machine travel (X/Z/W) |
mm |
750/400/50 |
| Minimum feed |
mm |
0.001 |
Machine
parameter |
Total power |
Kw |
25 |
| Air pressure |
MP |
0.5 |
| Cooling tank volume |
L |
600L |
| Size (Length/Width/Height) |
mm |
3500/2500/2410 |
| Weight |
Ton |
8 |
|
Machine tool standard configuration
|
| Item |
Name |
Unit |
QTY |
| 1 |
Controller |
1set |
SIEMENS |
| 2 |
Drive and motor |
1set |
SIEMENS |
| 3 |
X,Z axis Grating scale |
1set |
Germany HEIDENHAIN |
| 4 |
Work spindle encoder |
1set |
Magnetic gate sensor |
| 5 |
Cutting fluid filtration system |
1set |
Magnetic separator + water tank |
| 6 |
Spindle oil cooler |
1set |
TONGFEI |
| 7 |
Compressed air drying filter |
1set |
PNEUMATECH |
| 8 |
Grinding spindle frequency converter |
1set |
SHIHLIN |
| 9 |
Dresser spindle frequency converter |
1set |
SHIHLIN |
| 10 |
Electronic component |
1set |
Omron/Schneider |
| 11 |
Electric cabinet constant temperature air conditioning |
1set |
TONGFEI |
| 12 |
Self-lubrication System |
1set |
China famous brand |
| 13 |
Hydraulic system |
1set |
China famous brand |
| 14 |
Water injection rotary cylinder |
1set |
China famous brand |
| 15 |
Clamping fixture |
1set |
Factory customized |
| 16 |
X,Z axis lead screw |
1set |
THK |
| 17 |
X,Z axis rail |
1set |
THK |
| 18 |
Oil mist absorber |
1set |
China famous brand |
|
Machine tool optional parts configuration list
|
| 1 |
diamond roller |
1set |
|
| 2 |
internal thread grinding rod and wheel |
1set |
|
| 3 |
lathe tool rest |
1set |
|
Audited Supplier 
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