共查询到19条相似文献,搜索用时 437 毫秒
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典型钛合金壳体零件加工工艺 总被引:1,自引:0,他引:1
随着钛合金的广泛应用,由于其材料强度高,化学活性大,弹性模量较低等原因,其材料的难加工性越来越引起机械加工领域的关注。结合钛合金零件加工领域的技术资料和经验对典型钛合金壳体零件使用加工中心加工的工艺进行了理论探讨,重点介绍了钛合金壳体零件加工中铣削、钻孔、镗孔、攻丝等工艺,在实际运用中可以为钛合金零件加工领域的一线人员提供一定帮助。 相似文献
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袁伟 《精密制造与自动化》2016,(2):52-54
以一种钛合金材料零件的加工为例,对钛合金材料导热性差,化学性能活跃及机械加工困难等特点,从加工方法的选择,加工工艺的制定,加工参数的选择方面入手,分析钛合金材料的加工原则,以及在不同加工方法下表现出的具体特点和所应采取工艺措施。 相似文献
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正钛合金材料由于强度好,重量轻的特点,广泛应用于航空、航天和兵器行业,但是钛合金导热系数低、塑性低、弹性模量低和弹性变形大等特点,造成切削性能差,加工变形不易消除,高精度的零件关键尺寸不易保证。本文通过分析钛合金薄壁支架零件的加工,成功解决变形问题来探讨钛合金的特点。1.钛合金支架加工工艺分析(1)用附图所示零件展开工艺分析。 相似文献
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钛合金的比强度大、耐热性好以及耐低温等综合优良性能,使其在航空航天工业中得到广泛应用。但钛合金由于其硬度大、强度高、摩擦系数大、弹性模量低和高温下化学活性高等特点,使钛合金成为难加工材料之一,加工效率低。文章通过对钛合金切削加工现状的分析,举例研究了切削温度、切削力与不同切削参数之间的相互影响关系,以及刀具的磨损与刀具和工件的化学性质、切削参数和刀具与工件的物理性质等之间的相互影响关系。 相似文献
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根据钛合金的材料特性和切削加工性能,设计和制造了适合于加工钛合金工件的套料钻并制定相应加工工艺,并对钛合金进行深孔套料加工试验.试验结果表明,切削过程稳定可靠,通过套料加工可显著提高钛合金的材料利用率,为钛合金套料提供了一套有效的加工工艺方法. 相似文献
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介绍了以钛合金等难加工材料为对象的超高速磨削加工,开展了典型难1jim材料的机械物理性能测定及其超高速磨削特性基础和仿真研究,对提高以钛合金为代表的难加工材料的加工质量具有实用意义。 相似文献
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Titanium and its alloys are finding prime applications in industries due to their unique properties. However, the high cost of machining is one of the limiting factors for their widespread use. Tremendous efforts are being made to improve the existing machining processes, and new processes are being developed to reduce the machining cost in order to increase the titanium market. However, there is no report on the systematic study of the effects of machining variables on output parameters in rotary ultrasonic machining of titanium and its alloys. This paper presents an experimental study on rotary ultrasonic machining of a titanium alloy. The cutting force, material removal rate, and surface roughness (when using rotary ultrasonic machining) of a titanium alloy have been investigated using different machining variables. 相似文献
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钛合金材料导热系数小、弹性模量低、化学活性高的特点,给机械加工带来很大难题。本文结合钛合金加工领域的相关技术资料和实际工作经验对钛合金壳体工件在加工中心加工工艺进行研究,着重介绍壳体工件加工中铣削、钻孔、扩孔工艺的研究。为在该领域的工作人员提供一定帮助。 相似文献
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Lathe Turning of Titanium Using Pulsed Laser Deposited, Ultra-Hard Boride Coatings of Carbide Inserts 总被引:2,自引:0,他引:2
Despite several years of research and development, titanium machining remains a challenging task that is currently carried out by the use of straight WC/Co and polycrystalline diamond (PCD) tools. Commercially available coated tools tend to react chemically with titanium, while ceramic tools suffer from chipping and notching. Advancements in cutting tools, particularly coated carbides, are needed to reduce tool wear in machining of titanium alloys. In this work, a recently developed, ultra-hard AlMgB14-20%TiB2 composite material was applied as a coating on WC/6%Co tool inserts by a pulsed laser (excimer) deposition technique. The coating was smooth, continuous, and fairly uniform in thickness. The average coating thickness was 0.7 μm for a deposition rate of 0.08 nm per pulse. Nanoindentation tests revealed that the hardness of the coating was approximately twice that of the WC/6%Co substrate. Dry machining tool wear tests, conducted with a CNC lathe by turning bar stocks of heat-treated Ti-6Al-4V alloy, showed that the coated tools outperformed uncoated tools by about two times in flank and nose wears and performed nearly same as that of the commercially available TiAlN coated tool. Detailed analysis of worn tools revealed that the wear mechanisms are quite different in coated tools and are similar to those observed in PCD tools. Results agree well with the general observation that a stable, strong adherent layer forms at the interface between the tool and the chip and minimizes the dissolution-diffusion wear mechanism. 相似文献
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L. N. López de Lacalle J. Pérez-Bilbatua J. A. Sánchez J. I. Llorente A. Gutiérrez J. Albóniga 《The International Journal of Advanced Manufacturing Technology》2000,16(2):85-91
The paper examines the results of machining tests carried out on two alloys commonly used in the aircraft industry, specifically,
alphabeta type titanium alloy Ti6A14V and nickel-based superalloy of type 718. In view of their excellent mechanical properties
and their resistance to a wide range of temperatures, these alloys are widely used in the manufacture of turbo-engine parts.
They are extremely difficult to machine, however, for various reasons. The present aim is to consider how their drilling,
turning, and milling could be made more productive. 相似文献
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B. B. Pradhan M. Masanta B. R. Sarkar B. Bhattacharyya 《The International Journal of Advanced Manufacturing Technology》2009,41(11-12):1094-1106
Being a difficult-to-cut material, titanium alloy suffers poor machinability for most cutting processes, especially the drilling of micro-holes using traditional machining methods. Although electrical discharge machining (EDM) is suitable for machining titanium alloys, selection of machining parameters for higher machining rate and accuracy is a challenging task in machining micro-holes. The present research attempts to optimize micro-EDM process parameters for machining Ti-6Al-4V super alloy. To verify the optimal micro-EDM process parameters settings, metal removal rate (MRR), tool-wear rate (TWR), over cut (OC) and taper were chosen as observed performance criteria. In addition, four independent parameters such as peak current, pulse-on time, flushing pressure, and duty ratio were adopted for evaluation by the Taguchi method. From the ANOVA and S/N ratio graph, the significant process parameters and the optimal combination level of machining parameters were obtained. It is seen that machining performances are affected mostly by the peak current and pulse-on time during micro-electro-discharge machining of titanium alloy. Mathematical models have been developed to establish the relationship between various significant process parameters and micro-EDM performance criteria. In-depth studies have also been made to examine the influence of various process parameters on the white layer and surface topography through SEM micrographs of machined micro-hole. 相似文献
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根据对钛合金切削加工性的分析,针对钛合金切削刀具的主要问题,提出了从刀具入手解决钛合金切削加工问题的思路,以及合理选择刀具材料、确定刀具几何参数、刃磨刀具、冷却润滑的一般原则及方法。 相似文献
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钛合金整体叶盘是航空发动机的重要零部件,结构复杂,加工难度大。插铣加工因其轴向承受能力强和刚性大等特性,非常适合加工钛合金整体叶盘这类难加工、结构复杂的零部件。针对钛合金插铣加工效率的问题,采用响应曲面法设计插铣实验,建立切削力经验模型,以切削力和材料去除率为目标,采用NSGA-II算法进行多目标优化获得Pareto最优解。研究表明:切削力随主轴转速的增加而缓慢减小,随切削宽度、切削步距和每齿进给量的上升而增加;与实验初始参数组合相比,优化后的材料去除率提高了81.19%,而切削力减小了23.68%,达到了本研究的高效加工目标。 相似文献