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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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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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Gwo-Lianq Chern 《The International Journal of Advanced Manufacturing Technology》2005,26(9-10):965-969
In order to verify an edge breakout predicting model in orthogonal cutting, which was proposed by the author’s previous work, orthogonal machining experiments must be conducted. A CNC lathe was utilized to carry out simulated orthogonal cuttings. The workpiece, made of aluminum alloy Al 6061-T6, is a cylindrical bar with square threads and axial/radial grooves. Threading and grooving inserts with a flat cutting edge were chosen as the cutting tools. The experimental data were used to verify the previously developed edge breakout model. The tests showed excellent agreement with the model predictions. 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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Wu Ze Deng Jianxin Chen Yang Xing Youqiang Zhao Jun 《The International Journal of Advanced Manufacturing Technology》2012,62(9-12):943-951
Surface textures were made using laser on the rake or flank face of the cemented carbide (WC/Co) inserts. Molybdenum disulfide solid lubricants were filled into the textured grooves to form self-lubricating textured tools. Dry cutting tests on Ti-6Al-4V were carried out with these self-lubricating textured tools and conventional tool. The machining performance was assessed in terms of the cutting forces, cutting temperature, chip thickness ratio, friction coefficient at the tool–chip interface, and tool wear. Results show that the cutting forces and cutting temperature of the self-lubricating textured tools were reduced compared with that of the conventional tool. The application of the self-lubricating textured tool with elliptical grooves on its rake face can reduce the tool–chip friction coefficient and the chip thickness ratio. The tool life of the textured tools is improved compared with that of the conventional tool. The effectiveness of the self-lubricating textured tools in improving cutting performance is related to the cutting parameter. 相似文献
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The present work deals with some machinability studies on flank wear, surface roughness, chip morphology and cutting forces in finish hard turning of AISI 4340 steel using uncoated and multilayer TiN and ZrCN coated carbide inserts at higher cutting speed range. The process has also been justified economically for its effective application in hard turning. Experimental results revealed that multilayer TiN/TiCN/Al2O3/TiN coated insert performed better than uncoated and TiN/TiCN/Al2O3/ZrCN coated carbide insert being steady growth of flank wear and surface roughness. The tool life for TiN and ZrCN coated carbide inserts was found to be approximately 19 min and 8 min at the extreme cutting conditions tested. Uncoated carbide insert used to cut hardened steel fractured prematurely. Abrasion, chipping and catastrophic failure are the principal wear mechanisms observed during machining. The turning forces (cutting force, thrust force and feed force) are observed to be lower using multilayer coated carbide insert in hard turning compared to uncoated carbide insert. From 1st and 2nd order regression model, 2nd order model explains about 98.3% and 86.3% of the variability of responses (flank wear and surface roughness) in predicting new observations compared to 1st order model and indicates the better fitting of the model with the data for multilayer TiN coated carbide insert. For ZrCN coated carbide insert, 2nd order flank wear model fits well compared to surface roughness model as observed from ANOVA study. The savings in machining costs using multilayer TiN coated insert is 93.4% compared to uncoated carbide and 40% to ZrCN coated carbide inserts respectively in hard machining taking flank wear criteria of 0.3 mm. This shows the economical feasibility of utilizing multilayer TiN coated carbide insert in finish hard turning. 相似文献