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我们知道,数控铣头是通过CNC控制自动分度的,以实现与铣头主轴成各种角度的铣、镗、钻削等加工。我公司生产的某型号数控铣头如图1所示,它的铣头体2与底座5通过固定在其上的两个齿牙盘3及4连接,通过主机液压系统对铣头齿牙盘4连接体上的液压缸中液压油的施压,实现C轴对接夹紧与松开分度。 相似文献
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《现代制造技术与装备》2016,(1)
提出CNC多功能组合机床加工系统的总体构成及功能要求,系统地阐述其卡盘夹紧系统、铣头箱及磨头箱锁紧系统、尾架夹紧系统等液压系统的总体设计,完成液压系统各元件的选型。设计的液压系统既满足了各加工环节的相对独立,同时又能实现各加工环节间的协调运行,从而保证加工过程应有的灵活性、稳定性及加工零件的尺寸精度等,同时提高了机床辅助运动的工作效率。 相似文献
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基于普通龙门加工中心基础上设计了一款全自动万能铣头,它可以在机床不停机的状态下按预先编制好的加工程序实现自动更换铣头和A/C轴自动分度定位夹紧等功能,是一款高效的全自动附件铣头.它的设计成功为龙门式加工中心实现对工件多方向面机械加工变得更加容易快捷. 相似文献
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本课题设计的加工中心的托盘自动交换装置,简称(APC),是柔性加工单元(FMC)以及柔性加工系统(FMS)的重要组成部分。该机构实现托盘在液压驱动作用下实现自动交换以及托盘的传输,完成待加工工件和已加工工件之间的自动交换。本设计能够实现托板的升起下降和回转,进而使托盘带动的夹具和夹紧的已加工和待加工工件之间进行交换,从而实现了回转体对托盘的自动拉紧,以及对滑台在工作台上的固定。 相似文献
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大型数控机床附件铣头设计 总被引:1,自引:0,他引:1
论述了大型数控机床附件铣头设计过程中需要注意的关键环节,如附件铣头传动链的组成,附件铣头主轴形式的优选,附件铣头液压控制及润滑冷却系统的功能.同时介绍了附件铣头的装卸、运送、定位和转位系统,以及附件铣头的识别系统等.从对大型机床附件铣头设计的角度,深入剖析了附件铣头应用在基础件加工时需要注意的工艺问题及装配方法. 相似文献
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针对非金属嵌件自锁螺母收口时容易产生裂纹、非金属嵌件滑动等质量问题,基于多年加工实践经验,设计了自锁螺母收口夹具,有效地解决了自锁螺母的加工问题。该设计有很强的实用价值。 相似文献
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机械加过工艺系统复杂、环节多、影响因素多,对零件加工精度影响较大。为确保零件加工精度符合质量要求,必须对加工工艺环节中影响零件加工精度的因素进行控制。本文简单介绍了机械加工工艺,分析了机械加工工艺中影响零件加工精度的因素,探讨了基于机械加工工艺提高零件加工精度的措施。旨在为机械加工工艺中零件加工精度的控制提供一些参考。 相似文献
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为解决汽车座椅调角器自锁性能不稳定的问题,研究具有齿侧间隙的一齿差2K-H摆线针轮行星传动的正、逆传动机械效率的计算方法。通过对该行星机构的转化机构实际啮合传动过程的力学分析,建立转化机构瞬时效率和平均效率计算的精确数学模型。利用该模型所求出的转化机构效率计算了2K-H行星轮系的机械效率,并开发效率计算的应用程序。调角器产品的效率计算和试验测试结果证明该模型的正确性。运用该程序,还研究机械效率与各运动学参数及结构参数之间的关系,得出增加摩擦因数、减小偏距、减小两针轮齿数差、增加同时啮合轮齿对数及改变作用力分布,改变双片摆轮中心的初始相对转角均可以提高自锁性能的结论,并用以指导汽车座椅调角器自锁性能的改进。该数学模型的建立能够为进一步研究一定加工精度下2K-H摆线针轮的传动效率、机构的优化设计和齿廓修形后的传动性能提供理论基础。 相似文献
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Electrochemical machining process (ECM) is increasing its importance due to some of the specific advantages which can be exploited during machining operation. The process offers several special privileges such as higher machining rate, better accuracy and control, and wider range of materials that can be machined. Contribution of too many predominate parameters in the process, makes its prediction and selection of optimal values really complex, especially while the process is programmized for machining of hard materials. In the present work in order to investigate effects of electrolyte concentration, electrolyte flow rate, applied voltage and feed rate on material removal rate (MRR) and surface roughness (SR) the adaptive neuro-fuzzy inference systems (ANFIS) have been used for creation predictive models based on experimental observations. Then the ANFIS 3D surfaces have been plotted for analyzing effects of process parameters on MRR and SR. Finally, the cuckoo optimization algorithm (COA) was used for selection solutions in which the process reaches maximum material removal rate and minimum surface roughness simultaneously. Results indicated that the ANFIS technique has superiority in modeling of MRR and SR with high prediction accuracy. Also, results obtained while applying of COA have been compared with those derived from confirmatory experiments which validate the applicability and suitability of the proposed techniques in enhancing the performance of ECM process. 相似文献
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电解加工是利用金属在电解液中发生阳极溶解反应而去除工件上多余的材料、将零件加工成形的一种方法。电解加工的加工精度不仅与加工间隙有关,还与机床、工艺装备、工具阴极、工件、工艺参数等诸多因素有关,通常采用混气电解加工、脉冲电解加工、小间隙电解加工和改进电解液等措施提高加工精度。其中混气电解加工是将具有一定压力的气体与电解液按一定比例混合在一起,然后将这种混合物加入到工件的加工间隙中去进行电解加工的一种方法。混气电解加工可以缩小加工间隙,提高电解加工的加工精度和复制精度,但混气电解加工的微观不平度和不直度还不理想。从气液混合比、混气电解加工的特性以及混气电解加工的工艺三个方面对混气电解加工的原理进行一定的探讨,希望摸索一种提高电解加工精度的方法。 相似文献
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Shirish D. Dhobe B. Doloi B. Bhattacharyya 《The International Journal of Advanced Manufacturing Technology》2011,55(1-4):177-188
Electrochemical machining (ECM) process has great potential on account of the versatility of its applications. ECM is being widely used in the manufacturing industry because hard metals can be machined regardless of the mechanical property of a work piece. Titanium is broadly used in a number of fields such as aerospace, power generation, automotive, chemical including petrochemical, and sporting goods. Apart from these applications, it has tremendous prospective in dental, medical industries, and biomedical engineering. The biological performance of titanium implant depends on their surface topography and form accuracy that includes various surface parameters. ECM is one of the alternative machining processes that can be applied to the machining of titanium implant for biomedical applications. The aim of this paper is to present experimental result of surface characteristics obtained on titanium samples, utilizing developed cross-flow electrolyte supply system in electrochemical machining. It is observed that electrolyte flow velocity and voltage between electrodes are some of the influencing parameters, which affect the surface characteristics. Titanium oxide layer has been generated on the machined surface, which facilitates the improvement of the corrosion and chemical resistance of titanium implant. Effects of electrolyte flow velocity and voltage during electrochemical machining process for generation of various surface characteristics have been successfully studied through experimentation. In the present work, the obtained surface roughness values on the titanium sample machined by ECM were in the range of 2.4 to 2.93???m, which is within acceptable value for the implants. Effects of electrolyte flow velocity and voltage on the material removal rate and machining accuracy in the form of overcut are also presented in the paper. 相似文献
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精密电解加工是剃须刀网罩上微尺度阵列弧形群缝的首选加工工艺,为提高电解加工精度和加工过程稳定性,基于电场分析,优化了工具阴极凸起宽度、凸起高度关键尺寸的设计;基于对流场的数值分析,优化设计了电解液流道结构,优选了电解液进出口压力参数,消除了流道内可能存在的缺液区和流线交叉区域,并据此研制了专用工装夹具。通过工艺试验,研究了端面初始间隙、平均电压,进给速度等关键工艺参数对群缝缝宽的影响。在研制的数控电解加工设备上加工出了缝宽0.24 mm的弧形群缝,且群缝的曲线形状精度高,加工过程稳定,已能够满足批量生产的需要。 相似文献
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