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智能刀具状态监测系统及其应用 总被引:3,自引:0,他引:3
探讨了智能刀具状态监测系统的设计思想,提出了一种智能刀具状态监测系统的基本结构框图,并进行了试验分析,结果表明,通过人工神经网络估算刀磨损值与实例值基本一致,系统取得了90%的刀具磨损识别成功率。 相似文献
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刀具磨损和破损的综合监测法 总被引:5,自引:0,他引:5
简述一种监测刀具磨损和破损的方法——参考量综合监测法,并设计了监测线路。由于采用该方法时能对电网电压进行监测,自动减去首切电流,还用声发射(AE)、电机电流综合对刀具磨损和破损进行判别,所以拓宽了监测范围,提高了抗干扰能力,使该监测系统具有较高的判别成功率。 相似文献
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提出了一种监测刀具极限磨损和破损的新方法-多参量综合监测法。设计了监测线路,对电网电压进行了监测,自动减去首切电流,用声发射AE,电机电流对刀具极限磨损和破损进行综合判别,拓宽了监测范围。提出了抗干扰能力,系统具有高的判别成功率。钻削加工总体判别成功率达96。2%,车削加工判别成功率为96.7%。 相似文献
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加工过程刀具破损监测的声发射传感新技术 总被引:3,自引:0,他引:3
主要介绍了一种适合加工过程刀具破损监测的声发射传感新技术,论述了新型传感器的结构,工作原理及信号处理方法,同时还介绍了适合自动化加工过程的新型刀具破损实时监控系统及其应用效果。 相似文献
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Wang Chenpei Zhou Yunfei Zhou Yanhong Zhou Ji National NC System Engineering Research Center Huazhong University of Science Technology 《机械工程学报(英文版)》2001,(2):144-150
0 INTRODUCTIONWiththedevelopmentofNCmachinetoolsandtheincreasedcomplexityofparts ,theverificationofNC programbecomesmorsandmoreimportantinordertohelpuserdesign partsandenhancethemachiningefficiency ThereliabilityandthevalidityofNCprogramwillinfluencethe… 相似文献
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《Mechanical Systems and Signal Processing》2000,14(2):287-298
The process of metal cutting is a complex phenomenon that has been researched for many years but the aim of practical cutting tool condition monitoring has yet to be achieved. Previous work by the current authors using two neural networks (to classify acquired data) moderated by an Expert System (based on Taylor's tool life equation) has shown that it is possible to accurately monitor tool wear with a single machine/tool/material/cutting condition combination and to identify any inconsistencies between the predictions of the neural networks and engineering practice. This paper investigates the effects that minor inconsistencies in cutting conditions might have on such a system by determining the ‘zone of influence’ of this working system by systematically varying the cutting conditions whilst keeping all other variables fixed. The investigation has found that the zone of influence is small but usable, and an approach to the utilisation of the system in a machine shop is suggested. 相似文献
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This paper presents a new modeling approach, based on Oxley's predictive model, for predicting the tool-chip contact in 2-D machining of plain carbon steels with advanced, multi-layer coated cutting tools. Oxley's original predictive model is capable of predicting machining parameters for a wide variety of plain carbon steels, however, the tool material properties and their effects are neglected in the analysis. In the present work, the effect of the tool material, more particularly, the effect of multiple coating layers and the individual coating thicknesses on the tool-chip contact length in orthogonal machining is incorporated. The results from the model predict the tool-chip contact length with respect to major cutting parameters such as feed and rake angle, work material parameters such as the carbon content in the steel, and varying thicknesses and combinations of coating layers. This model enables more precise cutting tool selection by predicting the relative tribological impact (in terms of tool-chip contact length) for a variety of multi-layer coated tools. 相似文献
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以工件挠度、工件表面粗糙度、切削温度、切削功率、主轴扭矩、进给机构强度、刀杆强度及刀片强度为约束条件,建立了金属切除率与刀具耐用度的粗车车削多目标优化模型。通过实例采用NSGA-II算法对目标优化模型进行仿真,得到金属切除率与刀具耐用度Pareto最优解集以及背吃刀量、进给量、切削速度的优选取值,从而有助于粗加工的切削优化选择。 相似文献
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本文通过分析和实验,提出了用能量法来评价刀片抗早期破损能力的观点。文中分析了切削过程中的能量转换关系,指出切削过程中的各类能量可以通过实测的宏观物理量——切削力、切削温度等来加以衡量,并建立了表明各类能量之间分配关系的回归方程式。对在实际切削条件下所测得的回归诸元进行分析计算,获得了一个与刀片早期破损具有相关关系的实验参数——临界单位冲击功率e。由于e是在实际切削条件下获得的实验参数,在评价刀片抗早期破损的能力方面,可望比沿用的静态材料力学参数具有更大的优越性。 相似文献
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Innovative nanostructured tool coatings were developed in order to machine titanium-based alloys. Two dedicated coatings, AlSiTiN and TiCN, were applied by PVD on WC-Co tool inserts, developing nanostructured layers exhibiting superior performances, laboratory tests results being confirmed by machining experiments. Coatings surface qualification included tribological evaluation by ball-on-disc set-up, ball-erosion test, nanoindentation, scratch test, surface texture analysis and SEM observation with EDS analysis. The results have been compared to machining performances in wet and MQL turning, showing a marked pattern of agreement among different indexes. 相似文献
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