Study on EDM Technology of SiC/2024Al Composites

YU Peng; XU Jinkai; CUI Guangxu; LIAN Zhongxu; YU Huadong

doi:10.16080/j.issn1671-833x.2020.04.054

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Study on EDM Technology of SiC/2024Al Composites

更新时间：2026-04-17

- Study on EDM Technology of SiC/2024Al Composites
- Aeronautical Manufacturing Technology Vol. 63, Issue 4, Pages: 54-59(2020)
- 作者机构：
  
  长春理工大学机电工程学院,长春,130022
- 作者简介：
- 基金信息：
- DOI：10.16080/j.issn1671-833x.2020.04.054
  CLC：
- Published：2020
- 稿件说明：
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于朋，许金凯，崔广续，廉中旭，于化东. SiCP/2024Al复合材料电火花加工技术研究[J]. 航空制造技术, 2020, 63(4): 54-59.

YU Peng, XU Jinkai, CUI Guangxu, LIAN Zhongxu, YU Huadong. Study on EDM Technology of SiCP/2024Al Composites. Aeronautical Manufacturing Technology, 2020, 63(4): 54-59.
于朋，许金凯，崔广续，廉中旭，于化东. SiCP/2024Al复合材料电火花加工技术研究[J]. 航空制造技术, 2020, 63(4): 54-59. DOI： 10.16080/j.issn1671-833x.2020.04.054.

YU Peng, XU Jinkai, CUI Guangxu, LIAN Zhongxu, YU Huadong. Study on EDM Technology of SiCP/2024Al Composites. Aeronautical Manufacturing Technology, 2020, 63(4): 54-59. DOI： 10.16080/j.issn1671-833x.2020.04.054.

摘要

采用电火花加工工艺对 SiC

/2024Al 复合材料进行深小孔加工，研究了不同截面形状电极对电火花深小孔加工性能，如材料去除率、加工过程稳定性、孔质量的影响规律。结果表明，在相同加工条件下，螺旋电极电火花深小孔的加工效率明显高于圆柱电极。圆柱电极加工过程中，电极间隙中堆积的电蚀碎屑使工具电极频繁后退，大大降低了加工效率。SiC

/2024Al 复合材料电火花加工过程中会发生电极材料的熔化、汽化和氧化，同时，也伴随 SiC 颗粒的热剥落现象。在电火花加工表面观察到微裂纹的存在，在电火花加工过程中，由高温到低温的淬火过程使复合材料内部产生热应力，当应力超过材料的强度极限，则应力将以材料的塑性变形的方式释放，从而产生微裂纹。

Abstract

The deep hole processing of SiC

/2024Al composites was carried out by electrical discharge machining (EDM) process. The effects of different electrode cross-section shapes on processing performance such as material removal rate

machining stability and hole quality were studied. The results showed that the processing efficiency of EDM deep hole using spiral electrode was significantly higher than that of the cylindrical electrode under the same processing conditions. During the processing of the cylindrical electrode

the electro erosion debris accumulated in the electrode gap caused the tool electrode to retreat frequently

which greatly reduced the processing efficiency. Melting

vaporization and oxidation of electrode materials will occur during EDM of SiC

/2024Al composites. At the same time

thermal spalling of SiC particles will also occur. Micro-cracks were observed on the surface of EDM. During the process of EDM

the quenching process from high temperature to low temperature caused thermal stress in the composite material. When the stress exceeded the strength limit of the material

the stress will be released by the plastic deformation of the material

resulting in micro-cracks.

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