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.     

机床夹具参数化三维标准件图库的开发技术

论述了基于SolidWorks的机床失具参数化三维标准件图库的总体结构,提出了以Delphi为开发工具、以SolidWorks为建模软件平台,基于参数化技术和SolidWorks API技术的机床夹具标准件库的建模的方法,并给出了具体的应用实例.该库的建立有助于提高机床夹具的设计效率.     

钼炉耙臂装卸夹具的建模与应力分析

在SolidWorks软件平台上建立钼炉耙臂装卸夹具的三维模型,对夹具结构进行设计分析,检验其合理性.同时对所建零件模型进行虚拟装配,然后对装配模型进行三维动态检查.SolidWorks软件的使用提高了夹具的设计效率,也提高了其设计质量.     

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。     

基于SolidWorks面向装配的夹具CAD系统研究

针对机床夹具种类多、无固定设计模型和涉及数据资料多的特点,介绍CAFD开发方法和思路,提出一种基于SolidWorks的二次开发,建立夹具元件数据库和三维图库,在SolidWorks装配环境下交互式生成机床夹具装配体的方法,并阐述了夹具元件三维图库以及夹具三维装配体等生成的关键技术与实施方法。     

基于SolidWorks的机床夹具标准件三维图库的开发

机床夹具标准件图形库系统是制造工艺技术信息系统的重要组成部分.本文根据夹具设计的特点,介绍基于Delphi面向对象编程和数据库等技术的基础上,运用SolidWorks特征化、参数化造型方法及提供的二次开发工具,提出了基于SolidWorks环境下的三维机床夹具标准件库子系统的开发方法,为用户提供一种基于三维建模的快速夹具设计环境.     

基于SolidWorks的组合夹具标件三维图库开发技术

针对传统夹具设计中存在的问题,以及组合夹具元件标准化的特点,通过CAD参数化设计思想,利用Delphi7建立数据库,存储标准件的尺寸参数,设计用户交互界面,编辑相关代码,添加SolidWorks的类型库,最后调用SolidWorks API函数自动绘制三维夹具元件图,建立组合夹具标准件图库。应用验证表明本文开发的参数化3D图库对提高组合夹具设计效率和质量有较好的推动作用。     

基于SolidWorks的机床夹具标准件三维参数化设计

针对机床夹具三维设计中应用大量系列化的夹具标准件且存在大量重复设计的问题,采用SolidWorks软件及功能完整的API开发工具接口,以及具有图形用户界面的应用程序开发系统Visual Basic进行二次开发,链接并读取夹具标准件数据库Microsoft Access中的夹具标准件结构参数数据,实现机床夹具标准件三维参数化设计.该方法使设计过程变得简单、规范,提高了工作效率,缩短了产品设计开发周期.     

基于SolidWorks平台开发气压机工装夹具设计系统

基于SolidWorks2006为支撑软件,采用VB语言,Access数据库针对气压机工装夹具进行设计.建立了气压机工装夹具设计系统.该系统有工装夹具信息处理模块、三维参数化设计模块、夹具工艺过程模块、夹具性能评价模块、动画演示等功能,具有扩充性和开放性的特点.     

钼炉耙臂装卸夹具的建模与应力分析

在SolidWorks软件平台上建立钼炉耙臂装卸夹具的三维模型,对夹具结构进行设计分析,检验其合理性。同时对所建零件模型进行虚拟装配,然后对装配模型进行三维动态检查。Solid-Works软件的使用提高了夹具的设计效率,也提高了其设计质量。     

Minimal Realization of Linear Graph Models for Multi-physics Systems

An engineering system may consist of several different types of components,belonging to such physical"domains"as mechanical,electrical,fluid,and thermal.It is t...     

INTEGRAL EQUATION METHOD＇S APPLICATION IN HOLE-EDGE STRESS OF COMPOSITE MATERIAL PLATE WITH DIFFERENT SHAPED HOLES

The strength of composite plate with different hole-shapes is always one of the most important but complicated issues in the application of the composite material. The holes will lead to mutations and discontinuity to the structure. So the hole-edge stress concentration is always a serious phenomenon. And the phenomenon makes the structure strength decrease very quickly to form dangerous weak points. Most partial damage begins from these weak points. According to the complex variable functions theory, the accurate boundary condition of composite plate with different hole-shapes is founded by conformal mapping method to settle the boundary condition problem of complex hole-shapes. Composite plate with commonly hole-shapes in engineering is studied by several complex variable stress fimction. The boundary integral equations are founded based on exact boundary conditions. Then the exact hole-edge stress analytic solution of composite plate with rectangle holes and wing manholes is resolved. Both of offset axis loadings and its influences on the stress concentration coefficient of the hole-edge are discussed. And comparisons of different loads along various offset axis on the hole-edge stress distribution of orthotropic plate with rectangle hole or wing manhole are made. It can be concluded that hole-edge with continuous variable curvatures might help to decrease the stress concentration coefficient; and smaller angle of outer load and fiber can decrease the stress peak value.     

Non-monotonic material contrast in scanning ion and scanning electron images

30 keV Ga⁺ focused ion beam induced secondary electron (iSE) imaging was used to determine the relative contrast between several materials. The iSE signal compared from C, Si, Al, Ti, Cr, Ni, Cu, Mo, Ag, and W metal layers does not decrease with an increase in target atomic number Z₂, and shows a non-monotonic relationship between contrast and Z₂. The non-monotonic relationship is attributed to periodic fluctuations of the stopping power and sputter yield inherent to the ion–solid interactions. In addition, material contrast from electron-induced secondary electron (eSE) and backscattered electron (BSE) images using scanning electron microscopy (SEM) also shows non-monotonic contrast as a function of Z₂, following the periodic behavior of the stopping power for electron–solid interactions. A comparison of the iSE and eSE results shows similar relative contrast between the metal layers, and not complementary contrast as conventionally understood. These similarities in the contrast behavior can be attributed to similarities in the periodic and non-monotonic function defined by incident particle–solid interaction theory.     

Application of Feature Extraction through Convolution Neural Networks and SVM Classifier for Robust Grading of Apples

This paper proposes a novel grading method of apples,in an automated grading device that uses convolutional neural networks to extract the size,color,texture,an...     

分布动态载荷识别的抗噪处理

针对正交多项式频域法在用多种响应对矩形薄板进行载荷识别中抗噪性较差的问题,综合运用平均法、矩阵预处理和奇异值截断法等方法对之进行改善,并引入空间映射的思想,将该方法的应用范围拓展为复杂的模型.利用仿真算例,证实了该方法具有较好的抗噪性.     

基于MELTAC-N平台的核电厂安全级DCS环网研究与测试

针对工程实践中环网通讯相关问题的处理缺乏理论基础及国产化安全级DCS平台的开发缺乏成熟经验借鉴问题,对基于MELTAC-N平台核电厂安全级DCS环网的软硬件实现进行了研究。提出了安全级DCS环网双环网冗余设计、光切换开关设计等硬件设计方法,以及以RPR协议为基础,采用全数据收发策略的软件设计方法。在CPR1000安全级DCS平台上对安全级DCS环网的可靠性及实时性进行了评价,并进行了容错能力、响应时间及响应时间稳定性测试验证实验。结果表明,基于MELTAC-N平台安全级DCS环网软硬件设计具有较好的容错能力及响应时间稳定性。     

Short-Term Relay Quality Prediction Algorithm Based on Long and Short-Term Memory

The fraction defective of semi-finished products is predicted to optimize the process of relay production lines, by which production quality and productivity ar...     

End-to-End Multiview Gesture Recognition for Autonomous Car Parking System

The use of hand gestures can be the most intuitive human-machine interaction medium.The early approaches for hand gesture recognition used device-based methods....     

The laboratory simulation of abrasive wear

Abrasive wear has long been recognised as one of the most potentially serious tribological problems facing the operators of many types of plant and machinery; several industrial surveys have indicated that wear by abrasion can be responsible for more than 50% of unscheduled machine and plant stoppages. Locating the operating point of a tribological contact in an appropriate operational ‚map’︁ can provide a useful guide to the likely nature and origins of the surface degradation experienced in use, though care must be exercised in choosing the most suitable parameters for the axes of the plot. Laboratory testing of materials and simulations of machine contacts are carried out for a number of purposes; at one level for the very practical aims of ranking candidate materials or surface hardening treatments in order of their wear resistance, or in an attempt to predict wear lives under field conditions. More fundamentally, tests may be aimed at elucidating the essential physical mechanisms of surface damage and loss, with the longer term aim of building an analytical and predictive model of the wear process itself. In many cases, component surface damage is brought about by the ingress of hard, particulate matter into machine bearing or sealing clearances. These may be running dry although, more usually, a lubricant or service fluid is present at the interface. A number of standardised wear test geometries and procedures have been established for both two- and three-body wear situations, and these are briefly described. Although abrasive wear is often modelled as following an ‚Archard’︁ equation (i.e. a linear increase in material loss with both load and time, and an inverse dependence on specimen hardness) both industrial experience and laboratory tests of particularly lubricated contacts show that this is not always the case: increasing the hardness differential in an abrasively contaminated lubricated pair may not always reduce the rate of damage to the harder surface.     

ANGULAR DISTORTION ALLOWABLE VALUE AND ASSESS METHOD OF WELD ON COKE TOWER

A graph as the new engineering method for estimate the safety of bulging deformation of coke tower is proposed. Through stresses analysis of circumferential weld of coke tower and comparing the stresses produced by pressure with heat stress of steady state, residual stress, bending stress produced by both itself weight and wind loads, it showed that the stresses produced by pressure on the angle distortion are the main factor of equivalent stress of the combined stress. After comparing four kinds of stress controlling conditions, the relation to stress with depth of angular distortion, grade of curvature of angular distortion and half of region of angular distortion has been inferred. Graph of deformation allowable value of coke tower for different condition by angular distortion and half of region of angular distortion has been plotted. The five steps for its engineering use have been explained. The lighter the grade of curvature is, the larger of bulge allowance, may be, and the bigger of depth of angular distortion may pose too. For the coke tower with a popular structure of Dg 5 400 mm×28 mm, the result by graph is nearly more than the result of two formulas formed by other research, the error is less than 7.0%. But, the graph can be easily applied to different size of angular distortion.