IG 150U SPM
Crown wheel is a crucial component in all commercial vehicles and it is one of the most stress-prone parts of a heavy-vehicle. Volvo Commercial Vehicles Limited (VE Commercial),
a joint venture between the $106 billion Volvo Group worldwide and Eicher motors Ltd., manufactures automotive products across 5 divisions in India.
VE Commercial was facing rejection of Crown Wheels since they were being manufactured by the hard part turning process.
VE Commercial’s Challenge:
- Crown wheels produced had defects such as flatness, inaccurate surface finish and poor tolerance
- Heavy investments of efforts and expenditure incurred in detailed inspection of all the parts produced & rejections were resulting in high cost due to poor quality.
MGT’s Solution:
- MGT accepted the challenge of producing these critical drive-train parts demanding highest-quality, first-time-right from the machine without high inspection costs & rejections.
Hard turning was replaced by MGT’s precision grinding solution to overcome this challenge. - Designers at MGT developed an indigenous CNC Universal grinding machine – IG 150U SPM for bore and face grinding to address the requirements of VE Commercial.
- The Crown Wheels manufactured on MGT’s IG 150U SPM matched VE Commercial’s CTQ requirements of 10-micron flatness on an 80 mm long radial ground face reducing the rejection rate significantly.
Results achieved by IG 150U SPM
| Machine | IG 150U SPM |
|---|---|
| Operation | Bore & Face grinding |
| Stock Removal | 0.3 mm on ID & 0.15mm on face |
| Flatness on front face | 0.01 mm |
| Surface Roughness | 0.6 µm Ra on Face 0.4 µm Ra in Bore |
| Face run out wrt to bore | 0.01 mm |
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