Shanghai HD M&E Tech Co., Ltd.
SHANGHAI HD M&E TECH CO., LTD
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HMN-110 CNC Internal Grinding Machine CBN grinding wheel high speed grinding
I Working principle:
The CNC centerless internal grinder adopts double fulcrum and electromagnetic chuck for clamping and positioning. The processing method adopts numerical control oscillating grinding. The worktable is composed of two axes, X and Z, both of which are driven by a servo motor through a ball screw. The grinding wheel axis is located above the worktable, and the workpiece axis and the correction axis are fixed.
II Technical parameter
| Item | Specifications or parameters | Unit |
| Grinding method | CNC oscillating grinding | |
| Type of Grinding Wheel | CBN grinding Wheel | |
| Work piece clamping method | Double pivot + electromagnetic chuck | |
| Dressing method | Diamond roller dressing | |
| Grinding work piece outer diameter | According to customer requirements | mm |
| Grinding work piece inner diameter | According to customer requirements | mm |
| Height of grinding work piece | According to customer requirements | mm |
| Work piece center height | 1113 | mm |
| Rotating speed of spindle | 220~1300 | r/min |
| Spindle box rotation angle | ±60 | ° |
| Rotating speed of grinding wheel | 100~60000 | r/min |
| Max.stroke of Z axis | 400 | mm |
| Z axis moving speed | 0.2~333330 | μm/s |
| Z axis motor rotation speed | 15~2000 | r/min |
| Z-axis motor oscillation amplitude | 0~25 | mm |
| Z-axis oscillation times | 0~520 sine wave | times |
| X axis movement (forward side) | 110 | mm |
| X axis movement (backward side) | 10 | mm |
| X axis moving speed | 0.4~333330 | Φμm/s |
| Machine space occupation | 3680*2730*2410 | mm |
| Machine weight | 6000 | kg |
| Dimensional accuracy | ≤0.002 | mm |
| Roundness | ≤0.002 | mm |
| Cylindricity | ≤0.002 | mm |
III Application field
1. Suitable for the grinding of various workpieces of air-conditioning compressors
2. Used in the grinding of various workpieces in the bearing processing industry
3. Processing and grinding of various automobile parts
4. Grinding of various high-precision, ultra-high-precision aerospace and ship parts through holes, blind holes, step holes, cones, and end faces.
IV Grinding example----piston
Example description
| Item | Name or requirement |
| customer | Air-conditioning compressor company |
| Work piece name | Air conditioning compressor piston |
| Work piece material | NiCrMo alloy cast iron |
| Work piece hardness | HRC45-50 |
| Machining allowance | Φ0.27mm |
| Roundness | 2μm |
| Cylindricity | 2μm |
| Straightness | 1.5μm |
| Wave | 1.3μm |
| Roughness | Rz1.6 |
| Dimensional stability | Above CPk1.33 (tolerance ±3μm) |
| Processing beat | 30s |
| Dressing cycle | 50 pieces |
| Optimization purpose | Prove to achieve the performance of imported similar products |
Comparative Results
| Item | Imported equipment | Our equipment |
| Roundness | 0.82μm | 0.74μm |
| Cylindricity | 0.7μm | 0.6μm |
| Straightness | 0.87μm | 0.64μm |
| Wave | 0.8μm | 0.7μm |
| Roughness | Rz1.2 | Rz1.2 |
| Dimensional stability | Cpk1.69 | Cpk2.3 |
| Processing beat | 28s | 27.45s |