SiC/GFRP叠层复合装甲旋转超声孔加工轴向力与制孔质量研究

doi:10.12382/bgxb.2021.0533

摘要/Abstract

摘要： SiC/GFRP叠层复合装甲成型后具有高强度、高硬度、高韧性、高黏性等特点，孔加工极为困难，易出现叠层界面失效、陶瓷崩边、纤维撕裂等损伤。采用新型烧结/钎焊复合工艺薄壁金刚石套料钻，结合旋转超声振动辅助孔加工技术，建立了单颗磨粒的运动学模型，超声振动套孔加工时套料钻与工件周期性地接触分离，其断续切削特性有利于减小轴向力。对SiC/GFRP叠层复合装甲进行制孔试验，分析常规加工和超声辅助加工轴向力的变化规律和制孔质量。研究结果表明，相比于常规套磨加工，超声辅助套磨加工轴向力显著减小，降幅最大达31.8%；超声加工入孔叠层界面处粘结紧密，未出现陶瓷崩碎严重的现象；有效避免了常规加工出孔处不规则隆起和隆起高度较大的缺陷，隆起高度降幅最大达61.03%，显著改善了钻削出孔表面质量，降低了出孔损伤程度，为SiC/GFRP叠层复合装甲的高效低损伤连续孔加工提供了理论参考。

关键词: SiC/GFRP叠层复合装甲, 旋转超声振动, 金刚石套料钻, 制孔质量

Abstract: Due to its high strength, high hardness, high toughness and high viscosity, SiC/GFRP laminated composite armor after molding has considerable difficulty in hole drilling. Damages such as laminat interface failure, ceramic chipping, and fiber tearing tend to occur during hole drilling. The novel thin-walled diamond core drill prepared by the hybrid process of sintering and brazing was used. Combined with rotary ultrasonic vibration technology assisting with hole machining, the kinematic model of a single abrasive particle was established, the core drill and the workpiece were separated by contact periodically during ultrasonic vibration drilling, and the discontinuous cutting characteristic is conducive to reducing the axial force. The hole-drilling experiments on SiC/GFRP laminated composite armor were conducted. The change law of the axial force and the hole quality in conventional machining and ultrasonic vibration-assisted machining were analyzed. The results showed that: compared with conventional sleeve grinding, the axial force in the case of ultrasonic vibration-assisted sleeve grinding was significantly reduced, with a maximum decrease of 31.8%; the bonding at the laminate interface during ultrasonic machining was tight and no serious ceramic breaking occurred; defects featuring irregular bulges and large bulge height in holes by conventional machining were effectively avoided, and the maximum reduction of bulge height was 61.03%, which significantly improved the surface quality of the holes and reduced the degree of hole damage. The results provide theoretical reference for the continuous hole machining in SiC/GFRP laminated composite armor with high efficiency and low damage.

Key words: SiC/GFRPlaminatedcompositearmor, rotaryultrasonicvibration, diamondcoredrill, holequality

中图分类号:

董香龙，郑雷，韦文东，吕冬明，朱卓志，徐苏柏，秦鹏. SiC/GFRP叠层复合装甲旋转超声孔加工轴向力与制孔质量研究[J]. 兵工学报, 2022, 43(10): 2631-2639.

DONG Xianglong, ZHENG Lei, WEI Wendong, L Dongming, ZHU Zhuozhi, XU Subai, QIN Peng. Axial Force and Hole Quality in SiC/GFRP Laminated Composite Armor by Rotary Ultrasonic Machining for Hole Drilling[J]. Acta Armamentarii, 2022, 43(10): 2631-2639.

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