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炸药切削过程中切削力的数值模拟方法研究 被引量:3
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作者 何铁宁 成伟 康宗礼 《火工品》 CAS CSCD 北大核心 2005年第3期22-25,29,共5页
PBX炸药在武器中有广泛的应用,由于其钝感性,可以通过机械加工的手段将其加工成所需形状;但是,从保证炸药车削加工安全的角度出发,研究炸药切削加工过程中力的大小与分布十分重要,本文根据PBX炸药材料的力学性能实验和切削实验的结果,... PBX炸药在武器中有广泛的应用,由于其钝感性,可以通过机械加工的手段将其加工成所需形状;但是,从保证炸药车削加工安全的角度出发,研究炸药切削加工过程中力的大小与分布十分重要,本文根据PBX炸药材料的力学性能实验和切削实验的结果,采用有限元显式侵彻算法,研究适合炸药材料特点的弹塑性本构关系和等效应力的失效准则,模拟炸药切削过程;利用干切实验的结果,对数值模拟模型进行了修正和完善,切削合力的计算曲线与实验结果比较接近,随不同切削参数的变化趋势与实验基本一致,从而证明了此模拟方法是可行的。 展开更多
关键词 PBX炸药 切削数值模拟 有限元显式侵彻算法
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Simulation Study on Influence of Rake Angle in Gear Skiving Processes
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作者 REN Zongwei FANG Zhenglong 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI CSCD 2022年第3期263-270,共8页
Gear skiving is a promising gear cutting technology that can achieve a multiple faster internal gear cutting process than that of gear shaping. However,the kinematic system complicates skiving process,resulting in sev... Gear skiving is a promising gear cutting technology that can achieve a multiple faster internal gear cutting process than that of gear shaping. However,the kinematic system complicates skiving process,resulting in severe crater wear due to the intense variation of local cutting features. In particular,the negative rake angle near the cut-out is recognized as influential factor affecting the cutter wear progress,which needs the sophisticated simulation approach to elucidate the underlying cutting mechanism. In this research,the influence of the rake angle,e.g. top and side nominal rake angles of the cutter,is studied to further understand its role in the gear skiving process,for seeking the possibility of skiving process improvement by calculating the effective rake angle. As a result,the top and side rake angles of the cutter can both increase the effective rake angle when compared with the case of the none-rake angle,leading to an enhanced skiving process. This work provides fundamental knowledge of the rake angle for the gear skiving research,contributing to the optimization on the cutter parameters by considering the effective rake angle. 展开更多
关键词 gear skiving numerical simulation parametric modeling cutting characteristics cutter geometries
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