提高渐开线花键精度的现合加工方法

为满足渐开线花键的配合要求,同时降低加工难度,提出了一种新的加工方法——现合加工法。论述了渐开线花键现合加工法的原理,并结合实例进行应用,解决了渐开线花键加工困难的问题。     

散件装配电主轴单元的工艺研究

介绍了一种卧式车削中心用电主轴单元的工作原理及结构特点,探讨了电主轴生产的关键技术,对电主轴散件装配的工艺进行研究,为工厂在设计电主轴并进行散件装配提供依据及切实可行的工艺规程.     

装焊技术的工艺设计和工装设计在汽车上的应用

掌握汽车车身装焊工艺和工装设计的原则和方法，才能设计出科学、合理、先进的工艺和工装。     

基于SolidWorks软件的机床夹具设计方法

介绍了基于SolidWorks软件设计平台进行机床夹具设计的方法和关键技术。根据机床夹具的设计特点,以SolidWorks软件为平台,先建立夹具标准零件参数化实体模型库;然后针对不同夹具,二次开发出非标准件实体模型库;在通过虚拟装配得到装配体的三维实体模型后,经过图形转换和专家修改得到生产实际中应用的二维工程图。该方法有利于提高夹具设计效率,可以在机床夹具设计行业推广。     

全自动小型球轴承后装配生产线的开发及创新

详细介绍了小型球轴承后装配生产线的开发情况，以及与国内外同类生产线相比的创新之处。实践证明，此条生产线具有非常高的实用性及先进性，不仅为本公司低噪声轴承的生产做出了贡献，亦可推荐给轴承行业的用户们。     

一种新型装配机器人工具自动更换装置

本文介绍了一种新型装配机器人工具自动更换装置的结构、参数及试验研究结果。     

明清马面裙的形制结构与制作工艺

马面裙是明清女性着装中典型的裙子款式,它代表着中国女性生活史中一个重要的审美理念,即轻视结构、重视装饰、含蓄自然、释放身体的禅宗美学思想,与西方重视结构、突出人体的立体裁剪形成了鲜明的风格对比。对于马面裙的形制结构及制作工艺的研究,在一定程度上对于中国特色服饰风格的传承与创新有着崭新的时代意义。     

Predicting and evaluating the post-assembly shape of thin-walled components via 3D laser digitization and FEA simulation of the assembly process

Three-dimensional (3D) laser digitization has become a critical research field and a widely used technique for product quality inspection in the manufacturing and medical industries during the last decade. One common application of this technology is to analyze whether the final shape of an assembly component fulfills the designer’s geometric specifications. This task is currently performed by digitizing the component’s surface after mounting it into its final assembly or on a special testing frame. In order to speed up this process a new computational method is proposed for inspecting the final shape of an assembly component by virtually mounting it into the assembly, without the physical assembling process taking place. The developed computational method employs laser digitization to measure the initial shape of the assembly component and then finite element analysis (FEA) to predict its post-assembly shape. First, a laser-digitized dense mesh is smoothed and decimated to make it suitable for FEA. Material properties of the component, if not available, are then determined by a calibration process, and specific displacement boundary conditions are applied to reproduce the assembly process. After FEA is executed, the quality of the simulated post-assembly shape is checked using visualization tools such as light-reflection patterns and contour plots of the distance between the computed geometry and the target computer-aided design (CAD) geometry. Moreover, the accuracy of the proposed method is validated by comparing the simulated post-assembly shape with the actual post-assembly shape measured after physically assembling the component. Experiments show that the average distance between simulated shape and actual shape varies from 0.3 mm to 0.6 mm for objects with a characteristic size of a half meter, and that the isophotes and height fields of reflection (HFR) based indices are reduced up to 50%. The proposed method can thus predict the final shape of an assembled component well without assembling it, reducing the time and the cost of product quality inspection.     

基于多边形的积木式大直径测量方法研究

讨论一种根据与被测圆周有关联的多边形测量大直径的方法。通过磁铁现场组装各测量单元 ,可以实现任意大直径的内径和外径测量 ,而且具有测量装置结构简单、体积小巧、成本低廉以及标定容易等特点。由于各测量单元的平均化作用 ,误差分析指出其可以达到 0 0 0 2 +1×1 0 - 5D(mm)的测量精度 ,并由实验证实了这一结论。     

射水法建造地下连续防渗墙成槽施工技术的探讨

简要介绍了射水法建造地下连续防渗墙成槽原理、适用范围、施工工艺、特殊情况处理及质量控制，并探讨存在的一些问题。