Third, the application of computer simulation in the machinery industry
1. Application of Computer Simulation in Research of Complex Machining Process
The machining process is the basis for the production of the machinery industry. The use of computer simulation helps to discover its mechanism and provide theoretical support for improving machining performance. For example, in the aspect of grinding, Professor Wang Longshan of Jilin University proposed various mathematical models that describe the grinding process depending on time variation. Through computer simulation, the grinding behavior and grinding quality can be predicted and estimated, and the grinding process is optimized and intelligent. Control and virtual grinding create the necessary preconditions. Dr. Li Guofa and others studied the model of the grinding power for the grinding process, and used computer simulation to obtain the optimal grinding solution that can be applied to the actual grinding process. Wang Lin, from the School of Mechanical Engineering of Shandong University, also studied the computer simulation system of grinding temperature field, which realized the prediction and optimization of the grinding temperature field, and provided a theoretical basis for studying the influence of various processing parameters on the grinding temperature field. . In terms of milling, Professor Li Huzeng of the Department of Mechanical Engineering of Tongji University established a dynamic model of multi-tooth end milling process, developed a general software for cutting vibration simulation, and studied the principle of planar end mill cutting vibration by digital simulation method. condition. Professor Ren Fujun of Jiamusi University studied computer graphics simulation technology for multi-axis machining of complex curved surfaces by EDM; Dr. Lou Leming of Shanghai Jiaotong University established a process simulation system for EDM to realize the prediction of processing results and processing parameters. Optimization. In terms of extrusion molding, Dr. Chu Candong of Shanghai Jiaotong University established a computer simulation model of continuous extrusion, and obtained the stress field, strain field and temperature field of the continuous extrusion process through simulation experiments.
2. Application of Computer Simulation in Automotive Manufacturing Research
Automotive manufacturing is an important part of the machinery industry. It has many experimental topics, it is difficult, the cost of the field is high, and the introduction of computer simulation technology has effectively alleviated this problem. For example, in the aspect of the engine, Professor Bi Xiaoping of the Department of Mechanical Engineering of the Armored Force Engineering College established a computer simulation model for the starting process of a multi-cylinder diesel engine. The simulation results are in good agreement with the actual measured values ​​and can be used to simulate the starting performance of a multi-cylinder diesel engine. Cai Yixi of Jiangsu University of Science and Technology realized the dynamic simulation of the gas flow in the intake pipe, visually described the transient process, and provided an effective method for the study of the multi-cylinder engine ventilation process. In terms of automobile flow field, Dr. Lu Mingzhong from the School of Information Science, East China University of Science and Technology successfully simulated the airflow separation and towing vortex phenomenon of the vehicle wake field, established the aerodynamic model of the vehicle external flow field of two models, and simulated it. The experiment achieved satisfactory results. In the collision experiment, Dr. Zhan Yusong from the Institute of Power Machinery and Vehicle Engineering of Zhejiang University established a mathematical model of the occupant dynamic response based on the law between the accident pattern of the car collision and the occupant injury, and developed the corresponding simulation software. The system can partially replace the real vehicle crash test to study the passive safety performance of the car. In other respects, for example, Xiong Jian of the Automotive Engineering Institute conducted a simulation study on the braking process of the automobile. Yao Ge of FAW Volkswagen Automotive Co., Ltd. studied the portability of the steering of the car through simulation.
3. Application of Computer Simulation in Gear Design
Gear is the main basic component of mechanical products, and it is of great significance to carry out simulation research. Many researchers have done relevant research in this aspect. For example, Pang Guibing of Taiyuan University of Technology used Visual Lisp language to discuss the gear modeling and transmission simulation of any face gear from the geometrical point of view. Zhang Guangjun of Shandong Mining Institute used computer simulation to study the dynamics of arc-pin planetary transmission. Zeng Ying of the School of Mechanical and Electrical Engineering of Nanjing University of Aeronautics and Astronautics discussed the influence of the main parameters of the driving gear and the tool, the gear ratio and the modulus on the contact point of the orthogonal gear transmission through computer simulation. Computer simulation also has important applications in the design and manufacture of gears for gear pumps.
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Corner cube Prism is also named retroreflector or trihedral prism.In the corner cube prism,three reflecting surfaces are perpendicular to each other,like the side wall of the cube.The input surface is perpendicular to the cube diagonal. Disregarding the anlge of the incidence,the output beam is parallel to the input one,but it is of opposite direction. Inset of the several corner prisms, for better matching,their extrance exit surface is often hexagonal.In case of this prism the phenomenon of full internal reflection occurs so it is not necessary,(however it is possible)to put mirror coating on the reflecting faces. Normally the reflection surfaces are AL reflection coating, and then covered with Cu and Black painting.
Pyramid prism/Corner Cube Retroreflector is always used to reflect the beam entering the prism face, regardless of its orientation to the beam. Corner cubes are widely used where precision alignment is difficult.
Corner Cube Prism
Corner Cube Prism,Corner Cubic Prism,Optical Corner Cube Prism,Glass Corner Cube Prism
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