共查询到18条相似文献,搜索用时 93 毫秒
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高速铣削切削参数的模糊正交优化方法 总被引:4,自引:0,他引:4
为研究高速铣削加工中既有较高材料去除率、又有较长刀具磨损寿命的切削参数优化方法,通过正交试验,获得了不同切削用量下的刀具磨损寿命数据,并用模糊数学方法建立了刀具磨损寿命和材料去除率的隶属函数,计算了模糊综合评价隶属度.通过基于模糊综合评价直观分析与基于模糊综合评价最大隶属度分析的切削参数优化对比,证明切削参数的模糊正交优化方法是可行的. 相似文献
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针对铣削马氏体不锈钢时出现的刀具磨损严重、加工成本过高的问题,采用全因素实验设计方法研究了不同切削参数下刀具的磨损规律以及刀具寿命情况。研究结果表明:切削速度对刀具寿命的影响程度最大。在中低速切削时,刀具磨损过程存在正常的3个磨损阶段,进给量与切削深度对刀具寿命的影响程度相差不大;在中高速切削时,刀具磨损呈现线性规律,进给量对刀具寿命的影响程度明显高于切削深度对刀具寿命的影响程度。此外还以利润最大化为优化目标,提出了一种新的切削参数优化指标,并通过实验证明该指标可以较好地反映加工成本,对降低加工成本具有指导意义。 相似文献
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正交车铣高强度钢的刀具耐用度及磨损机理研究 总被引:2,自引:0,他引:2
通过TiN涂层硬质合金端铣刀正交车铣58SiMn高强度钢的刀具磨损试验,建立了刀具耐用度T-(vc,fa,fz)关系泰勒公式,分析了各切削用量对刀具耐用度的影响关系;对正交车铣刀具的磨损研究表明刀具表面材料的疲劳—剥落和切削刃微崩以及在高温下刀具材料中的元素与周围介质发生的化学反应磨损等是造成刀具磨损的主要原因。 相似文献
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Qi Shi Liang Li Ning He Wei Zhao Xiaoli Liu 《The International Journal of Advanced Manufacturing Technology》2013,64(1-4):49-54
In this paper, a number of experiments were carried out to study the machinability of a new damage-tolerant titanium alloy (TC21). Firstly, the effects of milling parameters, tool material, and tool wear on cutting forces were investigated. Secondly, the effects of milling parameters and tool wear on cutting temperature were studied. Finally, the effect of tool material on tool life was explored. Results showed that cutting force, cutting temperature, and tool life were greatly influenced by milling parameters, tool material, and tool wear. Thus, cutting tool matching with proper milling parameters should be carefully chosen to satisfying the tool life in actual production. 相似文献
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Xiangyu Wang Chuanzhen Huang Bin Zou Hanlian Liu Jun Wang 《The International Journal of Advanced Manufacturing Technology》2013,64(1-4):41-47
To investigate the influence of the geometric structure of coated cemented carbide twist drills on the drill tool life, drilling experiments of 42CrMo steel were carried out at various cutting parameters. The geometric structure parameters of the specially manufactured drill bits were designed by the multifactor orthogonal experiment method. The effects of cutting edge preparation, drill point geometry, and flute geometry on the tool wear were investigated by the range analysis and variance analysis. And their effects on chip pattern were also studied. Then the influence of cutting parameters on the tool life was investigated. Based on these investigations and extending the tool life, the optimized geometric structure was the honed cutting edge with a radius of 0.06 mm and conventional conical flank, and the corresponding cutting parameters were 80 m/min and 0.18 mm/rev. At last, the tool wear characteristics were discussed and the main wear mechanisms were abrasive wear, adhesive wear, coating exfoliation, and tipping. 相似文献
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由于齿轮高速干式滚切工艺切削速度高且缺少切削油的冷却润滑,为满足高速干切滚刀的抗磨损、耐高温等性能要求,高速干切滚刀基体材料和涂层的制备工艺均较为复杂,且价格昂贵,因而需要优化高速干切工艺以延长高速干切滚刀使用寿命,进而降低工件制造成本,提高效益。结合生产实践和理论分析,研究了齿轮高速干切滚刀的失效形式和失效原理,提出了以单个刀齿切削长度为高速干切滚刀寿命评价指标并建立相应计算模型的方法,基于此开展了高速干切滚刀寿命试验,建立了高速干切滚刀寿命多元线性回归模型,采用MATLAB求解得到该试验条件下的高速干切滚刀寿命经验公式。最后基于此提出了通过优化滚切工艺参数以及采用新型窜刀方式等来延长高速干切滚刀寿命的方法。 相似文献
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The effects of cutting parameters on tool life and wear mechanisms of CBN tool in high-speed face milling of hardened steel 总被引:1,自引:1,他引:0
Xiaobin Cui Jun Zhao Yongwang Dong 《The International Journal of Advanced Manufacturing Technology》2013,66(5-8):955-964
High-speed face milling of AISI H13 hardened steel is conducted in order to investigate the effects of cutting parameters on tool life and wear mechanisms of the cubic boron nitride (CBN) tools. Cutting speeds ranging from 400 to 1,600 m/min are selected. For each cutting speed, the metal removal rate and axial depth of cut are fixed, and different combinations of radial depth of cut and feed per tooth are adopted. The tool life, tool wear progression, and tool wear mechanisms are analyzed for different combinations of cutting parameters. It is found that for most of the selected cutting speeds, the tool life increases with radial depth cut and then decreases. For each cutting speed, the CBN tool life can be enhanced by means of adopting suitable combination of cutting parameters. When the cutting speed increases, the normal wear stage becomes shorter and the tool wear rate grows larger. Because of the variations of cutting force and tool temperature, the tool wear mechanisms change with different combinations of cutting parameters even at the same cutting speed. At relatively low cutting speed, in order to acquire high tool life of the CBN tool, the tool material should possess sufficient capability of resisting adhesion from the workpiece. When relatively high cutting speed is adopted, retention of mechanical properties to high cutting temperature and resistance to mechanical impact are crucial for the enhancement of the CBN tool life. 相似文献