检索结果-南通市图书馆

具有焊缝跟踪功能的汽车座椅骨架焊接系统设计

在线全文

学校读者我要写书评

暂无评论

焊接技术 2024年第2期53卷 99-103页

作者：刘楚生韩伟余稳胜谈毅广州城市理工学院机械工程学院广东广州510800

针对汽车座椅骨架焊缝较短、焊接位置多、材料厚度较薄容易变形等难点,设计了一套自动焊系统。该系统采用PLC控制技术对变位机、工件夹具、机器人等设备进行合理的控制,避免各设备运动轨迹发生干涉,保证焊接系统的安全性;通过对视觉传... 详细信息

针对汽车座椅骨架焊缝较短、焊接位置多、材料厚度较薄容易变形等难点,设计了一套自动焊系统。该系统采用PLC控制技术对变位机、工件夹具、机器人等设备进行合理的控制,避免各设备运动轨迹发生干涉,保证焊接系统的安全性;通过对视觉传感器进行设计,保证传感器的检测精度;通过视觉技术对焊缝中心点位置实时跟踪并反馈给机器人执行机构,保证座椅骨架的焊接质量;经测试,该系统焊接精度能够满足汽车座椅骨架的焊接要求。

关键词：焊接 PLC 焊缝跟踪视觉系统

A virtual experiment showing single particle motion on a linearly vibrating screen-deck

在线全文

学校读者我要写书评

暂无评论

Mining Science and Technology 2010年第2期20卷 276-280页

作者： ZHAO, Lala liu, chusheng YAN, Junxia school of mechanical and electrical engineering china university of mining & technologyxuzhou 221008china

A virtual sieving experimental simulation system was built using physical simulation *** effects of vibration frequency and amplitude,the inclination angle of the screen-deck and the vibration direction angle of screen on single particle kinematics were *** such as the average velocity and the average throw height were *** results show that the amplitude and the angle of vibration have a great effect on particle average velocity and average *** vibration frequency and the screen-deck inclination angle appear to have little influence on these *** materials that are difficult to screen the vibration frequency and amplitude,the screen-deck inclination angle and the vibration angle should be set to 14 Hz,6.6 mm,6° and 40°,respectively,to obtain optimal particle kinematics.A screening process can be simulated reliably by means of a virtual experiment and these results provide references for both screening theory research and sieving practice.

关键词： linear vibrating screen kinematics parameters single particle throwing motion virtual experiment

Influence of vibration mode on the screening process

在线全文

学校读者我要写书评

暂无评论

International Journal of Mining Science and Technology 2013年第1期23卷 95-98页

作者： Dong Hailin liu chusheng Zhao Yuemin Zhao Lala School of Mechanical and Electrical Engineering China University of Mining & Technology Key Laboratory of Coal Processing and High Efficient Cleaning and Utilization of Ministry of Education School of Chemical Engineering and Technology China University of Mining & Technology

The screening of particles with different vibration modes was simulated by means of a 3D discrete element method (3D-DEM). The motion and penetration of the particles on the screen deck were analyzed for linear, circular and elliptical vibration of the screen. The results show that the travel velocity of the particles is the fastest, but the screening efficiency is the lowest, for the linear vibration mode. The circular motion resulted in the highest screening efficiency, but the lowest particle travel velocity. In the steady state the screening efficiency for each mode is seen to increase gradually along the longitudinal direction of the deck. The screening efficiency increment of the circular mode is the largest while the linear mode shows the smallest increment. The volume fraction of near-mesh size particles at the underside is larger than that of small size particles all along the screen deck. Linear screening mode has more near-mesh and small size particles on the first three deck sections, and fewer on the last two sections, compared to the circular or elliptical modes.

关键词： Vibration mode Screening process Particles Discrete element method

Characteristics analysis of a novel centralized-driving flip-flow screen

在线全文

学校读者我要写书评

暂无评论

International Journal of Mining Science and Technology 2014年第2期24卷 195-200页

作者： Peng Liping Li Fengming Dong Hailin liu chusheng Zhao Yuemin Duan Chenlong School of Mechanical and Electrical Engineering China University of Mining & Technology Tangshan Research Institute China Coal Technology and Engineering Group Corp. School of Chemical Engineering and Technology China University of Mining & Technology

During screening operation, blinding or clogging of screen perforations generally occurs to reduce the sieving capacity and efficiency. Recently, the flip-flow screening has been widely recognized as a feasible method to deal with the problem. In this paper, a novel centralized-driving flip-flow screen(CFS) was developed for the separation of fine and moist coal, and the key structures, namely, a centralized-driving mechanism and a quasi-circle beam mounted with the mat were designed for high reliability and stability. By means of a test on an experimental prototype, the effect of some factors, i.e., initial stretch and hardness of the polyurethane panel, respectively, and the rotation speed of the driving motor on the kinematic characteristic of the screen surface was investigated. Results show that without an initial stretch, the sieve mat generates the largest vibratory amplitude while the slacker the sieve mat initially is, the smaller amplitude it will accomplish. And an increase in the rotation speed could cause a rise in the vibratory amplitude. Unlike the two factors, the hardness does not have a definite effect on the kinematic performance, on which a further study is required. Finally, screening processing on a laboratory prototype was conducted to draw the conclusion that the developed CFS also has a high sieving efficiency for the fine and moist coal.

关键词： Centralized-driving Flip-flow screen Fine and moist coal Kinematic characteristic Sieving capacity and efficiency

DEM simulation of particle flow on a single deck banana screen

在线全文

学校读者我要写书评

暂无评论

International Journal of Mining Science and Technology 2013年第2期23卷 277-281页

作者： liu chusheng Wang Hong Zhao Yuemin Zhao Lala Dong Hailin School of Mechanical and Electrical Engineering China University of Mining & Technology Key Laboratory of Coal Processing and High Efficient Cleaning & Utilization of Ministry of Education School of Chemical Engineering and Technology China University of Mining & Technology

A mathematical study of particle flow on a banana screen deck using the discrete element method (DEM) was presented in this paper. The motion characteristics and penetrating mechanisms of particles on the screen deck were studied. Effects of geometric parameters of screen deck on banana screening process were also investigated. The results show that when the values of inclination of discharge and increment of screen deck inclination are 10° and 5° respectively, the banana screening process get a good screening performance in the simulation. The relationship between screen deck length and screening efficiency was further confirmed. The conclusion that the screening efficiency will not significantly increase when the deck length L≥430 mm (L/B ≥ 3.5) was obtained, which can provide theoretical basis for the optimization of banana screen.

关键词： Banana screen Particle flow Discrete element method Numerical simulation

视觉控制数控机床机器人上下料PLC编程及研究

在线全文

学校读者我要写书评

暂无评论

自动化与仪表 2024年第4期39卷 69-73页

作者：廖志青韩伟魏文锋刘楚生广州城市理工学院机械工程学院广州510800 广州数控设备有限公司广州510700

针对汽车发动机缸体数控加工自动化上下料的机器人、视觉系统和输送链等设备PLC编程及控制等问题,探究西门子PLC控制器与康耐视相机、FANUC机器人之间的连接控制通信方法。规划设计PROFINET总线网络通信控制系统框架,以及视觉图像通过PR... 详细信息

针对汽车发动机缸体数控加工自动化上下料的机器人、视觉系统和输送链等设备PLC编程及控制等问题,探究西门子PLC控制器与康耐视相机、FANUC机器人之间的连接控制通信方法。规划设计PROFINET总线网络通信控制系统框架,以及视觉图像通过PROFINET进行传输的方法和参数设置。研究机器人如何根据视觉图像模板,检测在传送带上无序摆放的缸体零件位置偏移数据,调整手爪位置准确抓取零件的方法。通过时序控制方法协调机器人、视觉系统和输送链之间的动作节拍,提高系统运转的定位精准度和可靠性,实现高效高精度的智能化无人操作数控加工。

关键词：视觉图像总线控制数字孪生偏移抓取时序控制

维普期刊数据库博看期刊

Simulation of the screening process on a circularly vibrating screen using 3D-DEM

在线全文

学校读者我要写书评

暂无评论

Mining Science and Technology 2011年第5期21卷 677-680页

作者： Zhao Lala Zhao Yuemin liu chusheng Li Jun Dong Hailin School of Mechanical and Electrical Engineering China University of Mining ＆ Technology Xuzhou 221116 China Key Laboratory of Coal Processing and High Efficient Cleaning ＆ Utilization of Ministry of Education Xuzhou 221008 China School of Chemical Engineering and Technology China University of Mining ＆ Technology Xuzhou 221116 China

A numerical study of the motion particulates follow along a circularly vibrating screen deck was done using the three dimensional Discrete Element Method (DEM). The motion of the particles was analyzed. The effects of vibration amplitude, throwing index, and screen deck inclination angle on the screening process are discussed. The results show that the average velocity of the particles increases along the lon- gitudinal direction of the deck. The screening efficiency is highest when the vibration amplitude, throw- ing index, and screen deck inclination angle are 3-3.5 mm, 2.7 and 15°, respectively. This work is helpful for developing a deep understanding of particle motion and for optimizing screen separator designs.

关键词： Particulate materialsDiscrete Element MethodCircular vibrating screeningNumerical simulation

在线全文

学校读者我要写书评

暂无评论

传统工艺六堡茶加工机械的现状与发展

广西农学报 2024年第3期39卷 68-72页

作者：吴潜华吴晓宇莫秋云张凌云刘初生广西壮族自治区茶叶科学研究所广西桂林541004 藤县种植业技术服务站广西梧州543300

传统工艺六堡茶是六堡茶的一个重要品类,不同陈化年份的传统工艺六堡茶的感官品质特征变化明显,并能较好地保留和体现不同茶树品种的风格特点,深受茶叶消费者的喜爱,较具市场发展潜力。然而,目前广西传统工艺六堡茶加工以手工或半手工... 详细信息

传统工艺六堡茶是六堡茶的一个重要品类,不同陈化年份的传统工艺六堡茶的感官品质特征变化明显,并能较好地保留和体现不同茶树品种的风格特点,深受茶叶消费者的喜爱,较具市场发展潜力。然而,目前广西传统工艺六堡茶加工以手工或半手工制茶、单机机械制茶为主,茶叶生产企业及茶叶生产企业依据传统工艺六堡茶工艺定制或研发的加工机械较少,加工过程人工参与度较高,连续化、自动化程度偏低,这些因素在一定程度上制约了广西传统工艺六堡茶产业的高质量发展。文章结合广西传统工艺六堡茶加工机械的发展现状,对传统工艺六堡茶加工机械的发展趋势、创新制约因素展开分析,提出传统工艺六堡茶加工机械选用配备建议及若干创新对策,以期为广西传统工艺六堡茶产业的持续健康发展提供参考。

关键词：传统工艺六堡茶加工机械现状发展

维普期刊数据库博看期刊

在线全文

学校读者我要写书评

暂无评论

垃圾压缩站箱体结构的荷载分析及轻量化设计

中国机械工程 2017年第17期28卷 2124-2130页

作者：李昂刘初升中国矿业大学机电工程学院徐州221000

通过对垃圾压缩站箱体进行应力-应变测试,获得了箱体在工作过程中的荷载分布形式。采用Hyperstudy对曲线进行拟合筛选,得到与试验结果最匹配的荷载分布函数,并作为箱体优化分析的边界条件。同时引入超单元技术对模型进行简化处理,使得... 详细信息

通过对垃圾压缩站箱体进行应力-应变测试,获得了箱体在工作过程中的荷载分布形式。采用Hyperstudy对曲线进行拟合筛选,得到与试验结果最匹配的荷载分布函数,并作为箱体优化分析的边界条件。同时引入超单元技术对模型进行简化处理,使得模型的优化效率得到了大幅度提高。传统优化算法与超单元算法的对比验证了采用超单元技术处理复杂模型的有效性。

关键词：垃圾压缩站荷载分布超单元拓扑优化轻量化设计