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丁慧 《机电产品开发与创新》2014,27(6):78-79
伸缩式对称夹具可以夹持不同类型不同厚度的工件,工件的厚度变化不会影响工件固定后的中心线。并且该夹具的夹持头可以缩回夹具架,该夹具还具有安装空间小,夹持力大等优点。 相似文献
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该夹具由过渡盘、对称度调整盘、偏心调整盘及芯棒等主要部件组成,调整方便.适用多品种生产。文中介绍了调整方法。附图4幅。 相似文献
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蛇腹式弹性夹具用于加工齿轮时撑紧工件的内孔,从而可提高齿坯精车和插齿工序的定位精度。文中简要阐述了该夹具的设计原理及制造工艺。实践表明,在齿轮制造中应用这种夹具,对齿轮制造行业贯彻执行GB10095-88渐开线圆柱齿轮精度标准有着十分重要的意义。 相似文献
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孙立秋 《机械工人(冷加工)》2001,(11):21-22
1.引言 U形件多用于管连接、螺纹连接、紧固件等方面,其形状如图1所示。由于形状和使用上的特点,开口处的两个端头大都需要加工。通常,在车床上配以专用夹具进行切削加工是其主要的加工方法,所以,对多种形式规格的U形件进行加工时,就必须要设计不同的专用夹具,这不仅增加了夹具 相似文献
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分析了某真空泵叶片的加工要求,根据要求确定其加工机床,并设计了加工叶片圆弧面的夹具,通过验证可投入生产使用。 相似文献
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针对现有单螺杆调节式机床夹具易滑脱的缺陷,该夹具设计了通管内部的橡胶密贴层、定位块上的限位块和橡胶凸起,分别对工件的顶部及底部产生了较大的接触性和限制能力,使工件与机床夹具相贴合的部分不易滑脱。针对现有单螺杆调节式机床夹具头更换不便的缺陷,在夹块与定位块之间设计了卡块连接的方式,使得磨损后的定位块能够被快速的维护或更换。在夹块与衔接块之间用紧固螺丝进行高度调节,增加该机床夹具的调节能力。 相似文献
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高颂文 《机械工人(冷加工)》2003,(4):26-27
生产中,很多回转形零件的外圆与基准内孔间有较高的位置精度要求,此时,工艺人员通常会采用以下两种夹具来完成零件外圆的加工: (1)刚性心轴夹具,如图1所示。装夹时,工件2以刚性心轴1的外圆作为定位基准,采用端面 相似文献
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详细分析了长管子在制造加工中所遇到的难题,有针对性地解决了机床和夹具的设计及应用问题,提出了管子的找正办法,提高了产品质量和效率. 相似文献
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介绍在一台卧式加工中心B轴上加工四缸机体的自动液压夹具的设计.重点介绍上下料装置,过渡盘,输送定位与夹具定位的衔接等特殊设计.这副夹具已成功应用于生产实际. 相似文献
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K. A. Sundararaman S. Guharaja K. P. Padmanaban M. Sabareeswaran 《The International Journal of Advanced Manufacturing Technology》2014,73(5-8):669-679
High product quality and productivity are the important objectives of manufacturing industries. They are greatly affected by the fixture layout design, and it requires modeling and analysis of fixture-workpiece interactions. In particular, the position of fixture elements has explicit influence on the deformation of the workpiece which needs to be minimized during machining. In order to ensure effective fixture layout design, the relationship between the position of fixture elements and workpiece deformation has to be modeled and optimized. In this research paper, workpiece deformation is modeled using response surface methodology. The developed model is tested for model adequacy, and the results obtained are matched with the simulated data. Then, it is used to minimize the workpiece deformation by determining the appropriate positions of locators and clamps using sequential approximation optimization and LINGO solver. It is found that integration of response surface methodology, with sequential approximation optimization, produces better results than LINGO solver. 相似文献
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S. Selvakumar K. P. Arulshri K. P. Padmanaban K. S. K. Sasikumar 《The International Journal of Advanced Manufacturing Technology》2013,65(9-12):1573-1586
In machining fixtures, minimizing workpiece deformation due to clamping and cutting forces is essential to maintain the machining accuracy. This can be achieved by selecting the optimal location of fixturing elements such as locators and clamps. Many researches in the past decades described more efficient algorithms for fixture layout optimization. In this paper, artificial neural networks (ANN)-based algorithm with design of experiments (DOE) is proposed to design an optimum fixture layout in order to reduce the maximum elastic deformation of the workpiece caused by the clamping and machining forces acting on the workpiece while machining. Finite element method (FEM) is used to find out the maximum deformation of the workpiece for various fixture layouts. ANN is used as an optimization tool to find the optimal location of the locators and clamps. To train the ANN, sufficient sets of input and output are fed to the ANN system. The input includes the position of the locators and clamps. The output includes the maximum deformation of the workpiece for the corresponding fixture layout under the machining condition. In the testing phase, the ANN results are compared with the FEM results. After the testing process, the trained ANN is used to predict the maximum deformation for the possible fixture layouts. DOE is introduced as another optimization tool to find the solution region for all design variables to minimum deformation of the work piece. The maximum deformations of all possible fixture layouts within the solution region are predicted by ANN. Finally, the layout which shows the minimum deformation is selected as optimal fixture layout. 相似文献
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针对数控加工中零件信息的多样性,整合CAPP和NC中的共用资源,设计法兰盘类零件的检索式CAPP系统。检索式CAPP系统建立在成组技术基础上,利用零件的工艺相似性,通过检索和修改标准工艺(典型工艺)规程来制定相应的工艺规程[2]。在设计中涉及到成组技术、特征编码以及数据库设计与开发等关键技术。在实例开发中,以成组技术为理论指导,用Access创建零件工艺数据库,VB开发相应程序。该系统可直接检索已有的零件,可对任意法兰盘类零件进行特征编码,并判断其族类,对已有的族类检索出相似工艺,修改后保存,可为数控加工编程做准备。 相似文献
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重点介绍传统机床夹具设计的特点和虚拟技术的概念,通过虚拟技术在机床夹具设计中的应用和实现,以期进一步提高机床夹具设计的柔性和精度;进一步提高生产效率和经济效益。 相似文献