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Grinding of fir tree slots of powder metallurgy superalloy FGH96 using profiled electroplated CBN wheel

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Abstract

Broaching is commonly used for machining fir tree slots on turbine disk, which has outstanding advantages and disadvantages, such as high-quality machined surface, high manufacturing accuracy, and high productivity as well as fast tool wear, extremely high processing costs, long preparation time, and poor process flexibility. Utilizing the electroplated cubic boron nitride (CBN) profiled grinding wheels and single-sided local profiled grinding process, the experiments of FGH96 turbine disk slots are carried out. The results show that the high precision of slot profile can be achieved by the developed process. Using the given experimental parameters n = 48,000 rpm, ap = 0.002 mm, vf = 100 mm/min, and 600# electroplated CBN-profiled wheel, the profile error of FGH96 slots is within ±0.012 mm, and the grinding surface roughness is less than Ra 0.8 μm. After four whole slots are machined completely, the grinding wheel still has grinding capability, which proves that 600# electroplated CBN-profiled wheel can meet the grinding needs of FGH96 turbine disk slots.

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Funding

This work was partially supported by National Science and Technology Major Project of China (No. 2018ZX04005001) and National Natural Science Foundation of China (No. 51875028).

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Authors and Affiliations

  1. School of Mechanical Engineering and Automation, Beihang University, Beijing, 100191, China

    Xun Li & Ziming Wang

  2. School of Mechanical Engineering, Shandong University of Technology, Zibo, 255000, China

    Bin Qin

  3. AECC Commercial Aircraft Engine Co., Ltd., Shanghai, 201306, China

    Yu Zhang & Jianhua Yu

Authors
  1. Xun Li
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  2. Bin Qin
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  3. Ziming Wang
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  4. Yu Zhang
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  5. Jianhua Yu
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Contributions

Xun Li: overall framework, experimental planning, draft writing of the manuscript.

Bin Qin: grinding experiments operation, experimental result analyzation.

Ziming Wang: grinding wheel design, grinding parameter optimization.

Yu Zhang: profile accuracy measurement, grinding mechanism analysis.

Jianhua Yu: grinding experiment operation, experimental result analyzation.

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Correspondence to Xun Li.

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Li, X., Qin, B., Wang, Z. et al. Grinding of fir tree slots of powder metallurgy superalloy FGH96 using profiled electroplated CBN wheel. Int J Adv Manuf Technol 115, 311–317 (2021). https://doi.org/10.1007/s00170-021-07179-z

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  • DOI: https://doi.org/10.1007/s00170-021-07179-z

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