共查询到20条相似文献,搜索用时 62 毫秒
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研究利用TiAlN涂层刀具对P20预硬型模具钢进行高速铣削实验。研究、分析选择不同铣削参数对材料表面粗糙度的影响。利用正交实验方法设计和安排高速铣削实验,对实验结果进行直观分析并得出高速铣削中最佳的参数组合;然后利用方差分析法分析、验证实验结果,指出各个参数影响表面粗糙度的主次程序,并确定最优化的铣削条件。实验结果表明:合理选择P20钢高速铣削参数可获得较低的表面粗糙度;铣削参数对已加工表面粗糙度大小的影响程度依次为f、ν和ap;通过方差分析证实f=0.1mm/tooth、v=500m/min、ap=0.3mm为最佳铣削参数。 相似文献
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为了研究铣削速度3 000 m/min以上时主要铣削参数如何影响航空铝试件的表面粗糙度,设计铣削试验,分析试验数据,揭示了周期进给速度和铣削速度的变化与试件表面粗糙度大小的关系,最后总结得出影响航空铝7050试件加工表面粗糙度的主要因素和实现"以铣代磨"的铣削参数。 相似文献
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为了研究超高强度钢高速铣削过程中铣削参数对表面完整性的影响,本文基于正交实验法,采用涂层硬质合金刀片对16Co14Ni10Cr2Mo超高强度钢进行了高速铣削实验。分析了铣削速度、每齿进给量和铣削深度对三维表面粗糙度、表面残余应力和表面显微硬度的影响规律,并对铣削参数进行了优化。结果表明:三维表面粗糙度随铣削速度和每齿进给量增大而增大,随铣削深度的增大,呈现出先增大后降低的趋势;两个方向表面残余应力随铣削速度和铣削深度的增大而升高,垂直进给方向残余应力σ_y随每齿进给量的增大而升高,而沿进给方向残余应力σ_x呈现出先增大后降低的趋势;表面显微硬度随铣削速度υ_c的增大变化不大,随每齿进给量f_z和铣削深度a_p增大而降低;每齿进给量f_z对表面完整性影响最大;兼顾表面完整性和加工效率,最优铣削参数组合为:υ_c为150.7 m/min,f_z为0.02 mm/z,ap为1.0 mm。 相似文献
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通过切削试验研究了高速铣削淬硬钢时刀具变量中的几何参数(铣刀的前角、后角、螺旋角)、工件变量(工件硬度)和切削参数变量(铣削速度、每齿进给量)对加工表面粗糙度的影响。根据对试验结果的分析得出高速铣削淬硬钢工件表面粗糙度的变化规律。 相似文献
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通过对钛合金TC4在拉伸状态下的铣削试验,重点研究了高速铣削对钛合金TC4(Ti6A14V)表面残余应力和表面粗糙度的影响,得到了在不同切削参数下钛合金TC4表面残余应力和表面粗糙度的实验数据.实验结果表明,拉伸装夹基本不影响表面粗糙度,但可以大大提高加工表面残余压应力并增大残余压应力层的厚度,为开展钛合金拉伸高速铣削加工提供了依据. 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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高速切削技术及高速切削可转位铣刀的研究 总被引:4,自引:0,他引:4
高速切削是先进制造技术中最重要的加工工艺之一,而切削刀具是实现这一工艺的关键。论文介绍了高速切削技术,以及高速切削技术要求的高速切削刀具,特别说明的是高速切削铣刀;论述了高速切削的可转位铣刀的特点、切削刀具材料和刀体结构。 相似文献
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A. Maurel-Pantel M. Fontaine G. Michel S. Thibaud J. C. Gelin 《The International Journal of Advanced Manufacturing Technology》2013,69(9-12):2191-2213
Last years analytical or finite element models of milling become more efficient and focus on more physical aspects, nevertheless the milling process is still experimentally unknown on a wide range of use. This paper propose to analyse with accuracy milling operations by investigating the cutting forces values, shape of cutting forces curves obtained for different cutting speeds, and related phenomena as tool wear or tool run-out. These detailed experimental data in milling constitute a suitable experimental basis available to develop predictive machining modelling. All the tests have been conducted on the 304-L stainless steel in many cutting configurations and for different tool geometries. The machinability of the 304-L stainless steel with different tools geometries and configurations in shoulder milling is defined by three working zones: a conventional zone permitting stable cutting (low cutting speed; under 200–250 m.min?1), a dead zone (unfavourable for cutting forces level and cutting stability; between 250 and 450 m.min?1), and a high speed machining zone (high cutting speed; up to 450–500 m.min?1). All the used criteria (cutting forces, chips, wear) confirm the existence of these different zones and a correlation is proposed with cutting perturbations as tool run-out, cutting instability, ploughing, and abrasive wear. 相似文献