Abstract
To further improve the thermal characteristics of motorized spindle for high-speed precision machine tools, a novel shaft core cooling structure is proposed. This structure consists of several U-shaped cooling units arranged evenly in the shaft core, and the coolant can efficiently transfer heat of the shaft and bearings. The effects of this cooling structure on the thermal characteristics of motorized spindle are obtained based on the analysis model of motorized spindle thermo-structural coupling characteristics. The results show that the cooling structure can effectively control the temperature rise of the system. Compared with motorized spindle without shaft core cooling structure, the total thermal deformation is decreased by 50.2%, and the thermal balancing time is shortened by 50%, which enhances machining accuracy and efficiency. By regulating the parameters of coolant, the variation of axial thermal deformation can be limited to 2 μm at different rotation speeds.
| Original language | English |
|---|---|
| Pages (from-to) | 13-18 |
| Number of pages | 6 |
| Journal | Hsi-An Chiao Tung Ta Hsueh/Journal of Xi'an Jiaotong University |
| Volume | 51 |
| Issue number | 1 |
| DOIs | |
| State | Published - 10 Jan 2017 |
Keywords
- High-speed precision machine tool
- Machining accuracy
- Motorized spindle
- Shaft core cooling
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