共查询到16条相似文献,搜索用时 171 毫秒
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针对哈尔滨理工大学开发的三维复杂槽型波形刃铣刀片和平前刀面铣刀片,通过对耐热钢的面铣加工进行刀片粘结破损实验及槽型优选研究。首先,进行铣刀片三维温度场有限元分析,预测出波形刃铣刀片的抗粘结破损性能优良;其次,通过对温度场的模糊综合评判,预测了波形刃铣刀片的优越性能;最后,通过对难加工材料3Cr-1Mo-1/4V钢的面铣加工的实验研究,揭示了刀具粘结破损的实质,建立了铣削温度与前刀面最大粘结破损深度之间的数学模型,分析了铣削温度对刀具粘结破损的影响规律,并证明了波形刃铣刀片切削性能的优越性。 相似文献
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为获得切削性能更优良的可转位铣刀片槽型,从而改善铣刀片的力-热耦合综合物理场,进行了铣削温度试验和铣削力试验,以铣削时刀片的装夹状况和试验所获得的数据为边界条件,对带有三维槽型的波形刃铣刀片和平刀片分别进行了力-热耦合物理场有限元分析.基于模糊数学理论,建立了铣刀片耦合场的模糊综合评判模型,对两种铣刀片的力-热耦合物理场进行了模糊综合评判.结果表明,优化铣刀片前刀面的槽型可明显改善切削性能. 相似文献
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文中针对哈尔滨理工大学开发的三维复杂槽型波形刃铣刀片和平前刀面铣刀片,通过对碳素结构45钢的面铣加工进行了刀片冲击破损的实验研究。首先进行铣刀片三维应力场有限元分析及模糊综合评判,预测出波形刃铣刀片的抗冲击破损性能优良:其次,通过试验揭示不同铣刀片冲击破损失效形式的差异;通过大量、系统的冲击破损试验,建立冲击破损寿命累积分布函数数学模型,证明波形刃铣刀片的抗冲击破损性能优良。上述研究成果为解决自动化生产中刀具破损这一关键技术问题及槽型优选技术的研究提供了理论与试验基础。 相似文献
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用改进后的铣削力测量装置进行了不同槽型的铣刀片铣削力试验。基于铣削试验结果,通过机床坐标系与刀体坐标系统的转换,确立了铣刀片应力场有限元分析的载荷边晃条件。利用ANSYS软件,进行了自主研发的三维槽型铣刀片和平刀面铣刀片的应力场有限元分析。有限元分析及试验结果均表明,三维槽型铣刀片的应力场及抗破损能力均好于平前刀面铣刀片。 相似文献
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Ben Wang Wendian Yin Minghai Wang Yaohui Zheng Xiaopeng Li Zhenbo Ma 《The International Journal of Advanced Manufacturing Technology》2017,91(9-12):3015-3024
To investigate the edge chipping during drilling of the CFRP/Ti stack with carbide cemented tools, a drilling experiment was carried out and a tool failure model was proposed. Thrust force, drilling temperature, and tool wear were analyzed. A tool stressing model and a tool failure model of edge chipping were constructed respectively. On the basis of these, the prediction model on the edge chipping was established to forecast the failure time. Drilling temperature, Vickers hardness, and cutting speed were considered during the prediction model building. The results demonstrate that adhesive wear has a great influence on the edge chipping. The damage of adhesive wear for tool rake face leads to the load variation on rake face and the initial crack. Under the action of shear stress, the crack starts at rake face and then expands to the flank face, resulting in tool edge chipping. The affinity interaction (between titanium alloy with carbide cemented) and the thermal residual stress are two critical factors for tool edge chipping. Tear easily occurs inside the binding phase or at the boundary between hard phase and binder phase. As the drilling temperature increases, the hardness of the carbide cemented will gradually decrease. The prediction result of failure time is similar to the experimental result, and the effectiveness of the prediction model is verified. 相似文献
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机械加工中工艺系统的振动破坏了零件的加工精度。刀具与工件之间的冲击力是引起振动的主要原因之一。通过对带有三维复杂槽型的波形刃铣刀片与平前刀面铣刀片铣削力和铣削振动的对比试验、铣削力的有限元数值模拟,表明带有三维复杂槽型的波形刃铣刀片铣削力小,铣削过程中引起工艺系统的振动较平稳。可以断言,优化刀具的结构与几何参数可有效地减小铣削过程的振动现象。 相似文献