TOX~板件冲压连接技术

随着汽车市场产品的大众化,对于汽车制造商来说,生产装备技术的高效率、高质量、低成本已是汽车制造技术发展的必然趋势。传统的点焊,铆接作为工业界常用的不可拆卸式金属板件点连接方法,均存在着经济及技术上的不足和使用上的局限性。由德国托克斯冲压技术有限公司开发的TOX系列板件冲压连接技术,成功的解决了这些问题,并在国内外汽车制造中得到了越来越广泛的应用。TOX板件冲压连接技术又称无铆钉铆接,是在TOX气液增力缸式冲压连接设备上,采用TOX专用连接模具对被连接板件进行冷挤压,通过板件自身材料的塑性变形,形成TOX连接圆点而…     

新一代的板件连接技术

一、特点、使用范围及实例点焊、铆接是至今为止工业界常用的不可拆卸式板件点连接方法,这些方法均存在着经济上及技术上的不足。我们以点焊为例,它耗能大,效率低,连接费用高,连接点处存在着由于热变形而引起的应力集中,由此造成其动态疲劳连接强度差,并损坏了工件表面。而对有涂层、镀层的板件或板厚差异过大,或材质相异的板件之间,点焊很难或无法进行连接。此外,点焊连接过程无法进行自动监测,不能无损伤检测连接强度。由德国TOX公司研究开发的,获德国RUDOLF-EBERLE技术革新大奖的专利技术—TOX板件冲压连接技术,在世界范围内成功地解决了这些问题。它利用TOX专利模具及设备,通过板件本身的冷挤压变     

车身制造中的点焊质量控制

点焊是现代汽车车身及其他部件主要连接工艺方法,在汽车制造工业中发挥着不可替代的作用。车身点焊的连接质量决定了汽车的整体结构刚度和完整性。所以检测点焊的连接质量具有重要的意义。生产车身的冲压、焊装、涂装、总装四大工艺中,冲压将钢板板材压制成各种车身零件,而焊装将冲压的车身零件焊接组装成汽车车身。点焊是焊装工艺的主要组     

全新汽车板件连接工艺

汽车的众多部件均由多个金属板件连接而成。传统的点焊连接工艺，无法自动在线无损伤检测连接点质量和监控连接加工过程，可靠性差，连接费用高，效率低。而一种全新的TOX金属板件冲压点连接技术，简便可靠地解决了上述问题。这种点连接技术是在一种气液增力式的冲压连接设备上，采用专用的连接模具对被连接板件进行冷挤压，通过板件自身材料的塑性变形，形成一互相镶嵌的挤压圆点而实现连接。在此冲压点连接过程中，可实行全自动在线实时连续过程监控，     

TOX连接技术在板件连接中的应用

现代钣金制造业的激烈竞争和快速发展,对行业中金属板件的连接技术提出了越来越高的要求,传统的点焊、铆接作为业界常用的不可拆卸式金属板件的点连接方法,均存在着经济及技术上的不足和使用上的局限性。TOX连接是一种新的连接技术,又称为无铆钉铆接。本文主要介绍了TOX连接的原理,TOX连接与其他点连接方式相比的优越性,TOX连接采用的模具和设备及其在板件连接中的具体应用。     

TOX 板件冲压连接技术

随着汽车市场产品的大众化，对于汽车制造商来说，生产装备技术的高效率、高质量、低成本已是汽车制造技术发展的必然趋势。传统的点焊，铆接作为工业界常用的不可拆卸式金属板件点连接方法，均存在着经济及技术上的不足和使用上的局限性。由德国托克斯冲压技术有限公司开发的TOX系列板件冲压连接技术，成功的解决了这些问题，并在国内外汽车制造中得到了越来越广泛的应用。     

新一代的板件连接技术

新一代的板件连接技术托克斯冲压技术有限公司李勇，夏元海点焊、铆接是至今为止工业界常用的板件连接方法，这些方法均存在着经济上及技术上的不足。我们仅以点焊为例，它耗能大，连接费用高，在连接点处存在着由于热变形而引起的应力集中，造成其动态疲劳连接强度差，并...     

TOX~板件冲压连接技术

介绍了 TOX板件冲压连接技术原理、强度分析、适用范围及应用     

TOX^R板件冲压连接技术

介绍了TOX板件冲压连接技术原理、强度分析、适用范围及应用。     

TOX(○R)板件冲压连接技术

介绍了TOX板件冲压连接技术原理、强度分析、适用范围及应用.     

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.     

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....     

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。     

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.