共查询到18条相似文献,搜索用时 218 毫秒
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《现代制造技术与装备》2020,(8)
随着科技的飞速发展,形状曲面复杂的小零件精密切削加工技术不断完善。微小零件的尺寸小、型面复杂、加工精度高,对加工技术的要求很高。精密切削是一种高效的微加工技术,可以适用于多种类型的工件切削加工。基于此,探讨了复杂型面小零件精密切削加工设备,重点分析了加工刀具的选用、影响加工质量的因素以及精密切削道具线路规划和参数选择等工艺问题。 相似文献
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微小零件由于尺寸微小、结构复杂、加工精度高,所以对加工工艺的要求极高。微细切削是微细加工技术中效率较高、工件材料适用范围很广的加工方法,在微小零件的加工工艺研究中特别重要。主要阐述了微细切削加工设备及刀具系统配置、微细加工的特点及工艺要求、复杂曲面微细切削加工刀具和参数的选择、复杂曲面微细切削加工的实际加工等问题,通过采用合理的加工工艺和走刀路线,可以实现微小型零件的高精度加工,满足微小产品的需求。 相似文献
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随着微机电和纳米技术的快速发展,复杂形面微小零件的超精密加工显得越来越重要。本文通过对复杂曲面超精密加工的研究,针对金属材料制作的复杂形面微小零件的超精密切削工艺进行了深入研究。 相似文献
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针对薄壁零件加工中刀具磨损较为严重,工件尺寸不易控制、尺寸精度及形位公差要求较高、工件易变形等特点,通过选用切削刀具,调整切削参数,分析了如何提高薄壁零件的加工形面精度,给出解决问题的具体方法。 相似文献
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《机械工程与自动化》2020,(1)
针对薄壁圆形零件易变形、密封槽结构难加工等特点,通过合理分析零件的结构,融合先进的多轴加工技术,制定合理的零件加工工艺,选择合理的加工刀具及切削参数,有效地解决了密封槽的加工难题,保证了零件的形位公差,高效地完成了薄壁圆形零件的加工。 相似文献
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研究了使用CKA6136数控车床来加工复杂回转体零件,探讨了如何合理制订加工工艺方案,设计工件装夹方案以及合理选择刀具来最终完成零件的加工.通过对复杂轮廓切削工艺的分析,为企业及实际生产过程中复杂回转体零件的加工提供了借鉴,有助于提高加工效率和保证零件加工精度. 相似文献
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采用常规方法计算零件切削参数优化目标函数和约束条件时,忽略了生产效率和粗糙度两个变量,导致优化参数作用下的零件加工表面粗糙度较大和加工总工时较长。为提高生产效率和降低生产成本,提出了基于离散粒子群算法的复杂曲面微小零件切削参数优化方法,选择切削速度和进给量作为待优化切削参数,确定参数优化目标方向,对微小零件加工的功率、切削力、进给量及粗糙度等进行约束,利用粒子群算法求解优化目标和约束条件组成的数学模型,得到切削速度和进给量最优解。选择微小齿轮毛坯、铣刀及机床进行滚齿加工的对比实验,并采用设计方法和常规方法获取不同切削深度下的切削参数优化值。结果表明,设计方法减小了齿轮加工表面粗糙度,缩短了齿轮加工总工时,提高了滚齿表面质量和生产效率。 相似文献
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Changqing Liu Yingguang Li Jiaqi Hua Nanhong Lu Wenping Mou 《The International Journal of Advanced Manufacturing Technology》2018,97(1-4):229-241
Cutting tool state recognition plays an important role in ensuring the quality and efficiency of NC machining of complex structural parts, and it is quite especial and challengeable for complex structural parts with single-piece or small-batch production. In order to address this issue, this paper presents a real-time recognition approach of cutting tool state based on machining features. The sensitive parameters of monitored cutting force signals for different machining features are automatically extracted, and are associated with machining features in real time. A K-Means clustering algorithm is used to automatically classify the cutting tool states based on machining features, where the sensitive parameters of the monitoring signals together with the geometric and process information of machining features are used to construct the input vector of the K-Means clustering model. The experiment results show that the accuracy of the approach is above 95% and the approach can solve the real-time recognition of cutting tool states for complex structural parts with single-piece and small-batch production. 相似文献
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Hans-Henning Winkler Dirk Prust 《世界制造技术与装备市场》2007,(5):98-100
采用三维CAD系统,能够设计更为复杂的零件。要加工这类零件的五轴加工程序的编制是很困难的事。但是,随着功能完善和容量强大CAD系统的推广,从设计、制造到切削加工过程就变得容易了。因此,五轴加工中心的应用日益普遍,越来越多的零件采用五轴加工中心进行加工。智能机床方案使生产零件的五轴加工更趋实用。 相似文献
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复杂曲面模具加工系统综合刚度场建模与分析* 总被引:1,自引:0,他引:1
在加工汽车覆盖件模具复杂曲面时,机床-刀具刚度、刀具位姿变化、模具型面变化都会影响加工系统综合刚度,进而影响模具加工精度。以四轴数控加工中心为例,针对模具曲面特征设置相应采样点,依据多体小变形理论,通过点传递矩阵、雅可比矩阵等完成该采样点的加工系统综合刚度建模,并引入了力椭球。在刀具不同的空间姿态下,通过力椭球分析了机床横梁、刀柄、刀具、模具曲面特征等对加工系统综合刚度性能的影响,揭示了曲面模具加工系统综合刚度的分布规律。最后通过试验证明,该理论模型可以有效地优化复杂型面模具加工工艺,减小模具的加工误差。 相似文献
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Modeling and simulation of high-speed milling centers dynamics 总被引:1,自引:1,他引:0
El Bechir Msaddek Zoubeir Bouaziz Maher Baili Gilles Dessein 《The International Journal of Advanced Manufacturing Technology》2011,53(9-12):877-888
High-speed machining is a milling operation in industrial production of aeronautic parts, molds, and dies. The parts production is being reduced because of the slowing down of the machining resulting from the tool path discontinuity machining strategy. In this article, we propose a simulation tool of the machine dynamic behavior, in complex parts machining. For doing this, analytic models have been developed expressing the cutting tool feed rate. Afterwards, a simulation method, based on numerical calculation tools, has been structured. In order to validate our approach, we have compared the simulation results with the experimental ones for the same examples. 相似文献
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车铣复合加工技术能实现以铣代车或磨高速切削回转体零件。基于此技术的微细切削无论是在生产率还是在加工表面质量上,较其它加工技术而言,更适合于微细轴类零件和具有复杂型面的微小型零件的加工。通过微细车铣切削微细丝杠试验,从切削用量和加工质量及刀具磨损方面研究了车铣复合加工技术在解决微细丝杠加工中的应用。结果表明,基于车铣复合加工技术能够实现微细丝杠的高速切削。该技术非常适合于微细丝杠零件加工。 相似文献
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切削力的测量对于监测加工过程以及获得高精度的零部件具有重要作用,为实现自适应加工提供切削状态参数。研究了一种基于声表面波原理的切削力测量智能刀具。能在切削加工中实现主切削力的实时测量,并具有无线、无源的测量优势,能够适应复杂的加工环境。建立了切削力与声表面波谐振器石英基片应变的关系模型,分析了声表面波谐振器谐振频率,得到了切削力与声表面波谐振频率偏移量的关系。实验结果表明,基于声表面波原理的切削力测量智能刀具能够实现切削力的实时测量。 相似文献
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This article correlates laboratory-based understanding in machining of titanium alloys with the industry based outputs and finds possible solutions to improve machining efficiency of titanium alloy Ti-6Al-4V. The machining outputs are explained based on different aspects of chip formation mechanism and practical issues faced by industries during titanium machining. This study also analyzed and linked the methods that effectively improve the machinability of titanium alloys. It is found that the deformation mechanism during machining of titanium alloys is complex and causes basic challenges, such as sawtooth chips, high temperature, high stress on cutting tool, high tool wear and undercut parts. These challenges are correlated and affected by each other. Sawtooth chips cause variation in cutting forces which results in high cyclic stress on cutting tools. On the other hand, low thermal conductivity of titanium alloy causes high temperature. These cause a favorable environment for high tool wear. Thus, improvements in machining titanium alloy depend mainly on overcoming the complexities associated with the inherent properties of this alloy. Vibration analysis kit, high pressure coolant, cryogenic cooling, thermally enhanced machining, hybrid machining and, use of high conductive cutting tool and tool holders improve the machinability of titanium alloy. 相似文献