Research on EDM of Cooling Holes in Thermal Barrier Coated-Superalloys

WANG Li; ZHANG Guowei; GUO Yongfeng

doi:10.16080/j.issn1671-833x.2018.15.078

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Research on EDM of Cooling Holes in Thermal Barrier Coated-Superalloys

更新时间：2025-10-30

- Research on EDM of Cooling Holes in Thermal Barrier Coated-Superalloys
- Aeronautical Manufacturing Technology Vol. 61, Issue 15, Pages: 78-83(2018)
- 作者机构：
  
  哈尔滨工业大学机电工程学院,哈尔滨,150001
- 作者简介：
- 基金信息：
- DOI：10.16080/j.issn1671-833x.2018.15.078
  CLC：
- Published：2018
- 稿件说明：
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王力，张国伟，郭永丰. 热障涂层高温合金气膜孔电火花加工技术研究[J]. 航空制造技术, 2018, 61(15): 78-83.

WANG Li, ZHANG Guowei, GUO Yongfeng. Research on EDM of Cooling Holes in Thermal Barrier Coated-Superalloys. Aeronautical Manufacturing Technology, 2018, 61(15): 78-83.
王力，张国伟，郭永丰. 热障涂层高温合金气膜孔电火花加工技术研究[J]. 航空制造技术, 2018, 61(15): 78-83. DOI： 10.16080/j.issn1671-833x.2018.15.078.

WANG Li, ZHANG Guowei, GUO Yongfeng. Research on EDM of Cooling Holes in Thermal Barrier Coated-Superalloys. Aeronautical Manufacturing Technology, 2018, 61(15): 78-83. DOI： 10.16080/j.issn1671-833x.2018.15.078.

摘要

针对现今航空发动机叶片气膜孔传统电火花加工方法存在的生产周期长，ND:YAG激光加工方法加工质量较差的问题，提出基于辅助电极法的气膜孔电火花一次加工成形技术。针对该方法开展了4项关键技术研究，包括热障涂层高温合金数控系统、放电状态辨识系统、脉冲电源和基于模糊控制的伺服控制系统。基于上述技术，研制热障涂层高温合金气膜孔电火花加工控制系统，以实现加工过程中间隙放电状态的准确调节，提高加工效率与加工质量。以φ0.5mm气膜孔加工为例，与常规电火花加工控制系统进行对比试验，验证该技术有效性，研制试验表明，采用自行研制热障涂层高温合金电火花加工控制系统，可提高加工效率达110%，且孔口无微孔隙，交界面无分层微裂纹缺陷，验证试验表明，该系统可有效提高加工效率与加工质量。

Abstract

Aiming at the problem of long production cycle of cooling holes in the aero-engine blades with EDM method and the poor processing quality of the ND:YAG laser drilling

one step EDM of cooling holes was proposed based on assisting method. Due to significant difference in gap discharge state between ceramic coatings and superalloys

current EDM control systems were able to achieve a stable and accurate control

which cannot make a compromise on processing efficiency and quality. Therefore

Key techniques for EDM of cooling holes were studied

including discharge state identification method of thermal barrier coated-superalloy

pulse power supply and servo control strategy based on fuzzy control. Based on the above technology

the EDM control system for drilling thermal barrier coated-superalloys was developed. The comparison experiments show that compared with the conventional EDM control system

the self-developed system can improve processing efficiency by 110%

and can obtain better machining quality.

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