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高速切削刀具磨损寿命的研究 总被引:22,自引:4,他引:18
分析了高速切削时刀具的磨损形态 ,综述了各种高速切削刀具材料 (包括陶瓷刀具、立方氮化硼刀具、金刚石刀具、金属陶瓷刀具和涂层刀具 )高速切削时的磨损机理 ,讨论了高速切削铸铁、淬硬钢和镍基合金时刀具的磨损寿命。 相似文献
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传统加工中心的刀具选配仅以满足加工点的需求为目的 ,没有考虑刀具的可调性和可代用性。本文从刀具的组成特点出发 ,提出了基于逻辑刀具的刀具选配方法 ,把某些可以归为一类的需求刀具用一个逻辑刀具来代替 ,通过集合覆盖方法求解逻辑刀具。在不同的加工工件之间 ,通过调整逻辑刀具的实例状态来满足数控程序中的刀具需求。基于逻辑刀具的刀具选配法 ,可有效减少刀具的准备数量 ,提高刀具利用率。本文介绍了有关概念及算法 相似文献
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高速切削加工刀具材料 总被引:2,自引:0,他引:2
论述了高速切削的概念和优越性,介绍了高速切削加工所使用的先进刀具材料和刀具如:陶瓷刀具、金刚石刀具、立方氮化硼刀具、涂层刀具的性能特点及其应用,探讨了高速切削刀具材料的发展前景和研究方向。 相似文献
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电沉积金刚石钻削工具结构及参数优化 总被引:5,自引:1,他引:5
为提高脆硬材料的加工效率以及工具的使用寿命 ,对电沉积金刚石钻削工具结构进行了改进 ,优化了其结构参数 ,提出了采用开牙槽的套筒式结构作为基体的电沉积金刚石钻削工具。采用该类工具进行脆硬材料加工 ,可明显提高加工效率和使用寿命 相似文献
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Evaluating the effect of coolant pressure and flow rate on tool wear and tool life in the steel turning operation 总被引:1,自引:1,他引:0
Anselmo Eduardo Diniz Ricardo Micaroni Amauri Hassui 《The International Journal of Advanced Manufacturing Technology》2010,50(9-12):1125-1133
High-pressure coolant (HPC) delivery is an emerging technology that delivers a high-pressure fluid to the tool and workpiece in machining processes. High fluid pressure allows for better penetration of the fluid into the cutting zone, enhancing the cooling effect, and decreasing tool wear through lubrication of the contact areas. The main objective of this work is to understand how tool wear mechanisms are influenced by fluid pressure under different cutting speeds in the finish turning of AISI 1045 steel using coated carbide tools. The main finding was that the use of a lower cutting speed (v c ?=?490 m/min) in dry cutting resulted in tool life close to that obtained with cutting fluid, but when the cutting speed was increased (v c ?=?570 m/min), the high-pressure coolant was effective in prolonging the life of the cutting tool. It was also concluded that, regardless of the cutting speed and cooling/lubrication system, the wear mechanisms were the same, namely abrasion and attrition. 相似文献
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钛合金的切削加工性能差,其深孔钻削的技术难度更大。枪钻是深孔钻削的高效刀具,能有效解决钛合金的深孔加工问题。本文基于对钛合金材料切削性能和深孔钻削工艺的分析,通过深孔钻削试验,改进了钛合金叶片深孔钻削工艺,提高了枪钻寿命。 相似文献
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用于加工高速弧面凸轮的直接插补技术研究 总被引:3,自引:1,他引:2
在分析了弧面凸轮轮廓面上的加工刀痕对分度机构性能影响的基础上,提出了一种直接插补分度盘运动规律曲线的算法,介绍了相应的开放式数控系统。实验证明:用直接插补法加工的弧面凸轮,能有效降低分度机构的冲击和振动,提高其性能和寿命。 相似文献
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首先对线性累积损伤理论作了简要说明,介绍了应用累积损伤理论对多向应力时有限寿命的起重机吊钩上端螺纹的疲劳寿命进行了估算,得出了吊钩在有限寿命内其设计是可行的,能够满足使用要求. 相似文献
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According to the Taylor tool life equation, tool life reduces with increasing cutting speed. The influence of additional factors can also be incorporated. However, tool wear is generally considered a stochastic process with uncertainty in the model constants. In this work, Bayesian inference is applied to predict tool life for milling/turning operations using the random walk/surface methods. For milling, Bayesian inference using a random walk approach is applied to the well-known Taylor tool life model. Tool wear tests are performed using an uncoated carbide tool and AISI 1018 steel work material. Test results are used to update the probability distribution of tool life. The updated beliefs are then applied to predict tool life using a probability distribution. For turning, both cutting speed and feed are considered. Bayesian updating is performed using the random surface technique. Turning tests are completed using a coated carbide tool and forged AISI 4137 chrome alloy steel. The test results are applied to update the probability distribution of tool life and the updated beliefs are used to predict tool life. While this work uses the Taylor model, by following the procedures described here, the technique can be applied to other tool life models as well. 相似文献