共查询到20条相似文献,搜索用时 93 毫秒
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在分析高速干切削加工特点的基础上,根据绿色切削工艺过程的具体要求,讨论了高速干切削加工不同材质时,刀具材料、刀具涂层以及刀具结构的优化等方面关键技术及其应用. 相似文献
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利用碳化钨硬质合金刀具对Inconel 718合金进行高速切削,研究单位切削力、工件表面粗糙度、加工表面微观结构和刀具磨损在切削过程中随加工参数的变化,以寻找最佳切削条件,提出适当切削方法克服Inconel 718合金的加工障碍。同时,利用碳化钨刀具替代昂贵的PCD或CBN刀具进行切削,也为高速切削Inconel 718合金提供了较为经济的方案。 相似文献
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粗粒度人造多晶金刚石用作超精切削加工刀具材料的可能性 总被引:1,自引:2,他引:1
用粗粒度的人造多晶金刚石刀具进行车削试验.从理论和实验两方面对此种刀具切削形成超精密加工表面的机理进行了研究,提出了"微量切削过程中.人造多晶金刚石刀具多点切削、单点成形"的观点。在与天然单晶金刚石刀具的切削试验结果以及天然单晶金刚石刀具超精切削加工生产条件进行对比之后,验证了粗粒度人造多晶金刚石用作超精切削加工刀具材料的可能性。 相似文献
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数控强力刮齿加工是一种全新的高效齿轮加工方法。针对强力刮齿技术中存在的单刃型刀具使用寿命短的问题,提出一种更为高效的新型锥形多刃刮齿刀具。根据空间交错轴啮合理论和刮齿加工齿面形成过程,建立强力刮齿加工运动模型和锥形多刃刀具切削模型。基于仿真加工软件提出一种用于分析多刃刮齿刀具切削成形过程的模拟方法,给出了仿真模型设置、仿真切削加工步骤,并通过对比仿真切削加工结果,分析了多刃型刮齿刀具和单刃型刮齿刀具在切削成形过程中的异同,验证了锥形多刃刮齿刀具的可行性。为研究圆柱齿轮的多刃高效展成成形机理和研制新型锥形多刃刮齿刀具提供理论依据。 相似文献
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高速切削加工技术是近几十年来发展迅猛的一项先进制造技术,已经成为国内外研究的热点之一。刀具材料影响着高速切削加工技术的广泛应用。刀具材料经历了高速钢-硬质合金-陶瓷-超硬材料等不断发展的过程,切削速度和加工效率得以不断提高。本文分析了在高速切削加工中常用的刀具材料,并针对常用的被加工材料阐述了高速切削刀具材料的选择方法。 相似文献
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浅析自由曲面数控加工中刀具路径规划 总被引:1,自引:0,他引:1
复杂曲面广泛应用于航空、汽车、电子等行业,所以加工制造业对于自由曲面数控技术要求越来越高,而刀具路径规划是负责曲面加工过程中关键技术之一.本文在刀具路径规划技术发展基础上,对自由曲面数控加工中刀具路径规划问题进行了分析. 相似文献
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Balla Srinivasa Prasad M. M. M. Sarcar B. Satish Ben 《The International Journal of Advanced Manufacturing Technology》2011,55(9-12):1025-1035
In metal cutting as a result of the cutting motion, the surface of workpiece will be influenced by cutting parameters, cutting force, and vibrations, etc. Thus, by monitoring the machined surface topography of the workpiece and extracting the relevant information the cutting process and tool wear state should be able to be monitored and quantified. But the effects of vibrations have been paid less attention. The work in the present paper is divided into two parts. First part consists of a data acquisition and signal processing using acousto optic emission sensor (i.e., laser Doppler vibrometer) for online tool condition monitoring and the second part of the work presents the surface topography analysis of machined surfaces during the progression of the tool wear. Most of the work presented is also a study where surface metrology is being used to measure all aspects of the machining in combination with an online metrology tool. The encouraging results of the work pave the way for the development of a real-time, low cost, and reliable tool?Ccondition?Cmonitoring system. A high degree of correlation is established between the results of the acousto optic emission signal- and vision-based surface textural analysis in identification of tool wear state. 相似文献
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高速铣削加工的成功实施需要数控机床、CAD/CAM软件等软硬件及编程员专业素质的互相配合。编程员使用CAD/CAM软件编程时,要根据高速铣削的高速切削、快速进给、薄切层等特点确定各项参数。文章主要讨论用MASTERCAM9.1编程进行曲面高速铣削加工时,确定加工参数表中加工方式、刀具参数、加工参数等重要参数的方法。 相似文献
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2D FEM estimate of tool wear in turning operation 总被引:2,自引:0,他引:2
Finite element method (FEM) is a powerful tool to predict cutting process variables, which are difficult to obtain with experimental methods. In this paper, modelling techniques on continuous chip formation by using the commercial FEM code ABAQUS are discussed. A combination of three chip formation analysis steps including initial chip formation, chip growth and steady-state chip formation, is used to simulate the continuous chip formation process. Steady chip shape, cutting force, and heat flux at tool/chip and tool/work interface are obtained. Further, after introducing a heat transfer analysis, temperature distribution in the cutting insert at steady state is obtained. In this way, cutting process variables e.g. contact pressure (normal stress) at tool/chip and tool/work interface, relative sliding velocity and cutting temperature distribution at steady state are predicted. Many researches show that tool wear rate is dependent on these cutting process variables and their relationship is described by some wear rate models. Through implementing a Python-based tool wear estimate program, which launches chip formation analysis, reads predicted cutting process variables, calculates tool wear based on wear rate model and then updates tool geometry, tool wear progress in turning operation is estimated. In addition, the predicted crater wear and flank wear are verified with experimental results. 相似文献
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数控加工中,刀具的选择很重要,不仅影响机床的加工效率,而且直接影响加工质量。对数控刀具总的要求是安装调整方便、刚性好、精度高、耐用度好,在此基础上综合考虑工件材料的切削性能,机床的加工能力,数控加工工序的类型,切削用量以及与机床和数控装置工作范围有关的诸多因素。 相似文献
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针对高速切削和传统切削加工工艺之间存在较大差别的现象,通过对高速切削加工切削参数、切削路径、切削刀具、冷却方式等进行现状阐述分析,提出高速切削加工工艺的优化趋势。 相似文献
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在铣削加工中,采用顺铣还是逆铣方式是影响加工表面粗糙度及刀具切削寿命的重要因素之一.铣削方式的选择应视零件图样的加工要求,工件材料的性质、零件在加工中装夹的受力特点以及机床、刀具等条件综合考虑顺铣与逆铣在铣削加工中的应用.在现代加工技术中,各单位对于顺铣与逆铣的应用情况也不尽相同.因此需要掌握顺铣与逆铣的知识和在加工中的应用及切削力的分析. 相似文献
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袁国伟 《现代制造技术与装备》2012,(3):52-53
高速加工切削用量的选择主要考虑加工效率、加工质量、刀具磨损和加工成本。不同刀具加工不同工件材料时,切削用量会有很大差异。切削用量的选择是高速加工中的重要内容,切削用量的大小对加工效率、加工质量、刀具磨损和加工成本均有显著影响。本文对高速加工的切削用量选择问题进行了分析,给出了若干原则和建议。 相似文献