Research On The Process Simulation System Of Three-Dimension Numerical Control Mills

With development of global economy and the saturating day by day of the market, the competition between the manufacturing companies is fiercer and fiercer, and the traditional manufacture mode falls into the awkward situation because of diversification of the market. In order to lower costs and reduce development period, every manufacturing company introduced a lot of new technologies, but this brings a series of questions again: Before the system is set up and run formally, it is difficult to effectively evaluate benefit and risk of these system; When developing a new product, it is unable to confirm the value of developing, and to effectively evaluate the benefit after going into operation and the risk before putting into a large number of manpower and funds; Can't hold the live telecast at each stages of manufacture process of the products during each stages of product design and development, can't effectively coordinate the relation of the design and the manufacture of every stages, in order to seek enterprise's whole optimum benefit. With constant development of software and hardware technique of the computer and information network technique, and with gradual maturate of the auxiliary project of the computer and artificial technique, virtual design and virtual manufacturing technology arise at the historic moment which regard digitization describe as main means with, and have brought the limitless life to the solution to these problems.Virtual manufacture system is a manufacture system under virtual manufacturing environment, which is integrated application of multi-disciplinary technological system on the basis of computer artificial. Its key technology is follow as: virtual reality technology, modeling technology, artificial technology, information technology, etc. The development of the virtual manufacturing technology is to make progress in the development of these support technology at first, so, considering in term of developing virtual manufacturing technology, must pay attention to the research and development artificial to the computer.Among manufacture industry, computer artificial technology run throughwhole life cycle of products involving design and manufacture and even test and maintain. The process simulation of numerical control is regarded as the important component of the virtual manufacturing technology, and have already done a large amount of research both at home and abroad, and has won a great deal of application. After getting collaborative project of Singapore SDL Technologies Pte Ltd., to the artificial module of its CNC plus numerical control system, we study and develop three-dimension dynamic geometry artificial system of the process of numerical control mill.Because numerical control process simulation system use the background knowledge involving as CAD/CAM basic theory, three-dimensional modeling, the measure to collide to interfere, virtual manufacturing etc. it is the multi-disciplinary, multi-field knowledge that is synthesized and integrated, and the work load is enormous, and if you want to get a comparatively ripe software system easy to popularize, you need to make untiring efforts. In line with from simple to complicated principle, this text research the key technology of numerical control process simulation, and its the concrete content involves the following several respect:(1) The real time technology by which figure showsIn order to increase and process the artificial sense of reality, the system needs to solve a series of problems. At first, to design a good beautiful three-dimensional scene, to provide the convenience mutual tool, to realize watching that processes course of the artificial system from many angles. Second, to offer the rational three-dimensional figure drawing mechanism; during the course of processing artificially to accomplish the change of the entity fast and draw the scene again.In dynamic chain storehouse OpenGL3D that is developed at Intra3D, we have offered the standard mutual tool, for instance: Rotating, translation, enlarging, dwindling, etc. Among instances, writing some program to transfer these tools can realize to be mutual with three-dimensional scene. Because openGL3D encapsulation kernel of driving figure, we design corresponding figure target type according to need only, and define the store structure of the data and the course of drawing, then press nodes enter into the scene when real in the instance; the system will search for the chain form automatically, and will draw every layer node one by one while drawing the scene. The time in which those nodes are pressed and enter into the scene is very little among whole processing course to keep in real time, therefore the system can reflect the change course of the entity fast, and have good ? ocular results.(2) The modeling technology of triangle net modelWe describe the entity into a series of close triangle slice on the surface of it,...