全自动胀管机工作站的研制

介绍了全自动胀管机工作站的结构组成和工作原理。在空调换热器芯体大规模生产中,传统生产方式存在生产效率低、工人的劳动强度大等缺点。另一方面,智能工厂是全球工厂未来的发展方向。考虑以上两点,设计了全自动胀管机工作站。该工作站在不改变原有生产工艺流程和原有胀管机的情况下,通过增加各种自动输送线、机器人及抓手、旋转门工作台、自动归正定位台、视觉图像系统等一些智能辅助设备,提高了其自动化水平,实现了全自动生产、全程不落地生产,大幅提高了生产效率、减轻了工人劳动强度,也是空调换热器芯体智能工厂的重要组成部分。     

全焊板束装配焊接生产线的研制

板壳式换热器芯体板束的装配焊接是大型板壳式换热器制造过程中最重要的工序,介绍了一种全焊板束装配焊接生产线,实现了对板壳式换热器芯体板束的高效智能跟踪焊接。     

锅炉吹灰器喷嘴焊接自动化生产线设计

根据某工厂锅炉吹灰器喷嘴焊接的生产工艺流程,设计了由钻孔系统、喷嘴上料系统、环形焊接系统以及输送定位系统等组成的喷嘴焊接生产线;并使用PLC和触摸屏进行控制系统的软硬件设计,实现吹灰器嘴焊接自动化生产。经过调试,该生产线已运行生产,提高了喷嘴焊接生产效率,降低了工人劳动强度,保证了焊接质量。     

基于功能原理的全自动餐具分拣包装生产线的研究

鉴于目前一次性成套餐具再回收过程中,其分拣包装生产线存在工人劳动强度大、生产效率低、餐具易被二次污染的情况,基于功能原理,设计了一条全自动餐具分拣包装生产线。该生产线包括餐具自动分拣设备、自动整理设备、自动组装设备及自动包装设备等,其各个部分有机衔接为一体,采用PLC自动控制系统对整条生产线进行有序控制,实现了餐具分拣包装的全自动化。     

一种空调压缩机曲轴全自动去毛刺、浸油装置的设计

设计一种用于加工空调压缩机曲轴的全自动去毛刺、浸油装置,以消除目前由人工方法去除毛刺存在的劳动强度大、工作效率低、毛刺去除不彻底、曲轴各部位残留铁屑,严重影响压缩机的性能等问题。整套装置由上料流水线、设备电柜、设备主体、人机界面、换线移载机械手、出料流水线和取料流水线几个部分组成,全自动实现连接上道工序(曲轴打通流孔)、去曲轴毛刺、浸油和连接后道工序人工装箱。该去毛刺、浸油装置用于空调压缩机曲轴生产线,可大大降低工人的劳动强度,提高空调压缩机曲轴的加工质量,提高劳动生产率及自动化程度。     

油泵装配生产线单体泵装配工位的设计

目前国内大型公司生产的四缸、六缸等系列产品的油泵组装生产线的单体泵的装配,几乎全部是手工安装,效率低、工人劳动强度大,针对这些等问题,将单体泵装配工位设计为研究对象,实现了单体泵装配工位的设计和生产,极大地提高了单体泵装配工位的生产效率,极大地降低了工人的劳动强度。     

换热器管束与筒体装配卷扬车

我厂生产换热器批量大,任务重。过去管束和筒体的装配都是靠人工拉装,生产效率低劳动强度大,劳动条件十分恶劣,工人需要钻进筒体里面去拉,装一台φ800直径的换热器需5—6人一天时间,铆焊车间动脑筋,想办法,发扬自力更生,艰苦奋斗的革命精神,因陋就简,土法上马,利用废旧材料自制一台电动卷扬车,用以装配换热器管束与筒体,解决了换热器的关键。     

空调换热器自动化切片组装成形工艺研究

空调换热器是空调设备中的核心部件,生产工艺复杂,其中切片、螺丝锁付组装和折弯成形是三个关键的工序节点。由于分体式的空调换热器片管件具有规格多样、尺寸变形大、组装工艺多样等特点,目前这三个工序尚未能实现自动化生产,仍然采用劳动密集型的手工生产模式。针对分体式空调换热器片管件的特点,提出了相应的片管件高精度定位供料技术、自动化切片技术、拟人化的片管件组装技术,以及多工位水平式螺丝锁付技术,并据此设计了相应的自动化生产设备,实现了分体式空调换热器片管件切片组装成形的自动化生产。     

电饭煲铝盖冲压自动输送线设计

针对传统电饭煲铝盖生产线劳动强度大、生产效率低下和需要操作工人多的问题,设计了一条自动输送生产线。根据加工对象的特点,设计的生产线主要包括平移和升降运动,采用真空吸盘吸附工件,操作简便。实际应用表明,设计的自动输送线不仅结构紧凑,占地面积小,而且实现全自动加工,节约了劳动力成本,受到用户欢迎,得到广泛的推广使用。     

全自动冲压生产线在金属零件冲压加工中的应用

介绍了全自动冲压生产线,是集机、电、液及信息技术于一体的大型全自动冲压生产线,由压力机主机、机械手等连线组成,具有高智能化、高精度、高可靠性、高效率、节能、节材等一系列优点,能够提高生产效率和产品质量,减少操作工人数量和占地面积,降低生产成本。阐述了全自动冲压生产线的组成、原理及应用,并对其发展前景进行了展望。     

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.     

Limits of topographic measurement by the scanning tunnelling and atomic force microscopes

Parameters describing the topographic character of a surface (height, surface wavelength, slope and curvature) can be derived from equivalent sinusoidal profiles. The response of a surface-measuring instrument may be modelled in terms of instrument parameters such as stylus radius, and scanning range and resolution. The performance of the instrument may then be mapped as a zone in amplitude-wavelength (AW) space to show the sinusoidal profiles it is capable of measuring. In a first-order analysis the STM and AFM are considered as equivalent to contact-stylus instruments with a notional stylus radius equal to the tip radius plus the gap. Comparisons between different instruments and types of instrument are readily made by mapping in AW space. The error arising from convolution of the sinusoidal profile with that of the finite tip may be quantified and plotted as contours in AW space.