Investigation on Performance of Air Self-cooling Wheel during Profile Grinding of Turbine Disk Slots

LI Guang; LU Huihu; SONG Guihui; ZHANG Yidong; HUANG Yonggui; LIANG Guoxing

doi:10.3969/j.issn.1674-6457.2026.01.024

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Journal of Netshape Forming Engineering ›› 2026, Vol. 18 ›› Issue (1) : 257-265. DOI: 10.3969/j.issn.1674-6457.2026.01.024

Advanced Manufacturing Technology and Equipment

Investigation on Performance of Air Self-cooling Wheel during Profile Grinding of Turbine Disk Slots

LI Guang¹, LU Huihu^1,*, SONG Guihui¹, ZHANG Yidong¹, HUANG Yonggui², LIANG Guoxing²

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Abstract

The work aims to design an air self-cooling grinding wheel forming process for machining turbine disk slots to address the challenges of cooling difficulties and localized burning induced by the complex contour structure and film boiling effect. A single-layer electroplated CBN grinding wheel was employed for grinding of the slot contour on a GH4169 nickel- based superalloy turbine disk. To evaluate grinding performance under varying conditions, including grinding wheel rotational speed, workpiece feed rate, and grinding depth, measurements were conducted using a cutting force measurement system, thermocouples, scanning electron microscopy (SEM), and a three-dimensional profilometer to analyze grinding forces, temperature, surface morphology, and surface roughness. Results indicated that, the tangential grinding force F_y of the turbine disk slot under different grinding process parameters varied between 22.6 and 35.7 N, whereas the radial grinding force F_x ranged from 38.4 to 48.1 N. The highest grinding temperature occurred at the slot peak, followed by the slot bottom, with the lowest temperature observed on the transition slope. Grinding temperature across all regions remained below 298.4 ℃, and no surface burn marks were detected. The slot surface exhibited characteristic morphological features, including material adhesion, plastic flow, and pitting. On the transition slope, grinding scratches were shallow and uniformly distributed, resulting in superior surface quality compared with the peak and bottom regions, and the surface roughness achieved a value of Ra 0.6 μm. Conclusions indicate that the air self-cooling grinding wheel enables efficient profile grinding of turbine disk slots, demonstrating effective air-cooling performance with no occurrence of surface burn. By employing process parameters such as high wheel rotational speed, low workpiece feed rate, and small grinding depth, the surface quality of the ground turbine disk slots is significantly enhanced.

Key words

air self-cooling grinding wheel / turbine disk slots / profile grinding / grinding temperature / surface morphology

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LI Guang, LU Huihu, SONG Guihui, ZHANG Yidong, HUANG Yonggui, LIANG Guoxing. Investigation on Performance of Air Self-cooling Wheel during Profile Grinding of Turbine Disk Slots[J]. Journal of Netshape Forming Engineering. 2026, 18(1): 257-265 https://doi.org/10.3969/j.issn.1674-6457.2026.01.024

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Funding

Fundamental Research Program of Shanxi Province (202203021222072, 202303021222114); Shanxi Key Research and Development Program (202402050201009, 202402150301011); Shanxi Province Scientific and Technological Achievements Transformation Guide Special Project (202304021301040)