共查询到19条相似文献,搜索用时 62 毫秒
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以微径球头铣刀铣削力为研究对象,分析了刀具刃线模型.将刀具沿刀轴方向离散为若干切削单元,分别依照单齿切削及两齿切削求得各切削单元的实际瞬时切削厚度.基于实体造型的方法提取了参与切削的切削刃段,并通过实验识别了瞬时切削力系数及主轴径向跳动参数,建立了综合考虑主轴径向跳动、微细铣削所特有的尺度效应的影响及可能出现的单齿切削现象的微径球头铣刀铣削力模型.实验结果验证了所提模型的有效性和可行性. 相似文献
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研究了高速加工中球头铣刀的铣削力特性。通过综合运用理论建模法和经验系数法,并引入高速切削时引起切屑动量改变所需的作用力,建立了高速切削条件下球头铣刀的铣削力模型。实验验证结果表明,理论计算值与实验测量值吻合良好。 相似文献
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试验研究了球头铣刀在不同刀具姿态下的铣削力影响规律,结果表明在采用球头铣刀进行铣削加工时,为了得到较小的铣削力,适宜采用前倾角+15°,侧倾角+15°这种刀具姿态. 相似文献
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Zhang B. Zheng L. Zhang Z. Zhang L. Li Z. Liu D. 《The International Journal of Advanced Manufacturing Technology》2003,21(6):403-410
This paper presents a model for predicting the cutting forces for waved-edge milling cutters that are widely used in rough
machining. The development of the model is based on the analysis of the complicated cutting edge of waved-edge cutter. According
to the existing local cutting force model and from the relationship of local cutting force and chip load, local cutting force
can be derived. Then the model is obtained by dividing the cutter into a number of differential elements in the axial direction
and summarising the resultant cutting force produced by each differential cutter disc engaged in the cut. A numerical algorithm
is introduced for the calculation of total force and the calibration of the relevant parameters in the model. A series of
experiments under different cutting conditions are conducted to confirm the validity of the developed model. The agreement
between the experimental and simulative results is satisfactory, which shows that the model is effective for cutting force
prediction in end milling with waved-edge cutters.
ID="A1"Correspondance and offprint requests to: Prof. L. Zheng, Institute of Manufacturing Engineering, Department of Precision Instruments and Mechanology, Tsinghua University,
Beijing, 100084, P. R. China. E-mail: lzheng@tsinghua.edu.cn 相似文献
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球头铣刀切削力模型的研究进展 总被引:1,自引:0,他引:1
综合评述了国内外对球头铣刀切削力模型的研究成果及发展动态,重点介绍了球头铣刀铣削力的经验系数建模、理论建模和自动化加工铣削力建模方法。 相似文献
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Li Xiwen Yang Mingjin Xie Shouyong Yang Shuzi 《Frontiers of Mechanical Engineering in China》2007,2(3):272-277
In the milling process, the major flank wear land area (two-dimensional measurement for the wear) of a small-diameter milling
cutter, as wear standard, can reflect actual changes of the wear land of the cutter. By analyzing the wearing characteristics
of the cutter, a cutting force model based on the major flank wear land area is established. Characteristic parameters such
as pressure parameter and friction parameter are calculated by substituting tested data into their corresponding equations.
The cutting force model for the helical milling cutter is validated by experiments. The computational and experimental results
show that the cutting force model is almost consistent with the actual cutting conditions. Thus, the cutting force model established
in the research can provide a theoretical foundation for monitoring the condition of a milling process that uses a small-diameter
helical milling cutter. 相似文献
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借助建立的铣刀切削力、扭矩和切削功率的计算机预报模型 ,对平前刀面球头铣刀的切削性能进行了数值仿真研究 ;通过分析各种切削参数对切削性能的影响规律 ,获得了不同切削条件下球头铣刀切削力和扭矩的特征和变化趋势 相似文献