真空吸盘技术在剥离始极片中的应用

目前,铜电解始极片人工剥离作业劳动强度高,始极片易产生弯曲变形,严重制约着始极片铜质量的提高。近年来,剥片机得到了广泛的使用,使得铜始极片的剥离能够实现自动化,从而减轻工人的劳动强度。文中重点介绍了一种真空吸盘式剥片机的设计。通过对其剥片运动原理进行分析,使剥片机构运动简洁,运行速度快,保证了剥片机的精度。     

检测和剔除带粒子始极片技术的研发

始极片在传统法铜电解车间,用做电解阴极,如果始极片上有粒子,将影响始极片机组的正常运行,也会影响始极片的垂直度,降低了电铜质量等问题.本文对如何筛选和剔除有粒子的始极片做了研究.研制出一种能有效剔除带粒子的始极片装置.实际运行效果良好,降低了设备故障率、改善了铜表面质量,也降低了工人劳动强度.     

铜电解始极片剪板装置的分析及改进

首先介绍了铜电解始极片的生产工艺.为提高始极片的质量,提出并改进了剪板装置,使生产出的始极片达到了两端平整,尺寸统一,外形美观的要求.同时,使得始极片的生产流水线化,节省了生产时间,提高了生产效率,从而更好地满足了生产实践需要.     

铜始极片剥离时的应力与变形分析

铜板剥离是始极片制作及电解铜生产过程的重要工序。传统的手工剥离效率低,劳动强度大,而目前的自动化剥离设备存在部分铜板无法剥离的问题。文中对始极片剥离机理进行研究,分析了由钛板与铜板组成的板结构受到的垂直于板面的横向力的作用,得到三金属层等截面叠层板在弯曲力作用下的应力,为后续剥离机理以及相关力学问题的研究提供了理论参考。     

铜始极片预剥离技术的研究

针对铜始极片预剥离失败导致后续剥离无法进行的问题,运用材料力学理论对铜始极片与钛种板结合面的剪切力进行了分析。以钛板厚度和挠曲力的作用位置为变量设计了9种组合,并分别建立了三维模型,应用ANSYS Workbench软件进行了模拟仿真,对各组合的界面端剪应力及板结构的挠曲变形进行了比较分析,找出了所设变量对铜始极片预剥离阶段的影响,确定了有利于提高铜始极片剥离质量和效率且对钛种板损伤小的较优组合。研究结果表明:铜始极片界面端处剪应力达到最大值,解释了始极片开口原因;选择较小的钛板厚度,并使挠曲力作用位置靠近界面端则会更有利于始极片的预剥离。     

镍始极片自动弯耳送耳机结构设计

铜始极片的耳片制作采用"拉耳穿棒技术",传统的加工方法不能满足镍耳片的成形质量要求,为此设计了专用弯耳送耳机。弯耳送耳机主要由耳片输送单元、耳片处理单元、机械手、门架等部分组成。成形后的镍片通过机械手夹持进入下一工序,不仅减少了耳片成形后的回弹作用,保证了产品质量,而且减少了工人劳动强度及人工操作造成的误差,大大提高了生产效率。     

一种剥离设备

阴极剥片机组属于铜精炼的自动化专用设备,论文介绍的阴极剥片机组主要用于剥离电积和电解过程中沉积在不锈钢阴极板两面的阴极铜.重点介绍了剥片技术、两自由度极板转移技术、三段喷淋可调向洗涤技术.该设备具有结构紧凑,运行速度快,能耗低、不损伤阴极板等优点.     

搬运镍始极片的专用堆垛台设计

通过对冶金工业中镍始极片的堆垛要求进行分析,并参考所配合使用的搬运机械手的运作规律,设计了一个自由度为2的镍始极片堆垛台。堆垛台主要由旋转底座、升降部分和挡杆等零部件组成。它可以实现360°旋转（每次可转90°）和升降的功能,从而可以满足镍始极片整齐堆垛的要求。另外,该堆垛台不仅可以运用在镍始极片的堆垛上,还适用于其他同类物品。利用这一装置可以大大减轻工人的劳动强度,改善工人的劳动条件,从而大大提高生产效率。     

旋转超声电解复合加工三维流场仿真

单因素试验表明在相同加工条件下旋转超声电解复合加工小孔效率优于旋转电解加工小孔,为研究阴极旋转和高频振动对旋转超声电解复合加工流场的影响,基于有限元ANSYS CFX软件建立了旋转超声电解复合加工流场仿真模型,分析了阴极旋转和阴极高频振动下加工间隙内的流场变化。分析结果表明:阴极旋转使得电解液绕流,对电解液速度、压力影响较小,而阴极高频振动使得加工区发生抽吸,加速了电解液的流动,使得加工区内电解液压力波动变化,有利于电解液的更新与电解产物的排出。     

基于PLC的负极片自动化生产线控制系统设计

介绍了负极片自动化生产线控制系统总体流程,设计了一种基于PLC的负极片自动化生产线控制系统,重点叙述了控制系统设计要求、系统软硬件设计架构,并通过对负极片自动化生产线控制系统的开发,实现了负极片自动化生产,提高了生产效率,降低了劳动强度,使工人免受汞等有毒物质的侵害。     

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.