| Steel-punching is the essential procedure to insure the quantity of steel in the steel factory , the abroad steel industry is already widespread to adopt the method of auto punch to punch steel number and production date on the steel billet ., in order to find out quantity problem , avoid export of the bad production and resulting in the mixing steel trouble. Usually metal marking equipments adopt the following several methods : rolling-print type, spraying-soldering type, electroetching type, spraying-print type, punching type, laser type. Comparing with the various markings method, the needle punch type is the best way to mark the steel plate.This article treat the plate needle punching machine as the research object, for the purpose of saving money, in this experiment, the controlling part proceed in the library, and the device imitate the action of punching machine and do not produce the actual action, it save a lot of cost, adapt to work in laboratory, and its functions are not less than that of the actual punching machine, have the better demonstrating function, can further be developed the actual product.8051 series microprocessors base on the embedding control system, they are applied in the various applying systems from military application to automatic control and the keyboard of PC, the market is only less than that of the 68 HC11 of Motorola in the market of the 8 bit controllers , a lot of manufactories can provide 8051 series microchip, such as the Intel, Philip, Siemens etc. these manufactories join many functions into the 51 series microchip . these functions based on the same interior core make 8051 microchip are easily the basic frame of the productions, it can run many kinds of procedure and the learners only need to study this tool.The punching needle are the key part of the needle steel punching machine, its construction form act as the decisive rule for the main performances, such as the quality of punching font and punching speed; At the same time, if the array forms of the punching head are different, the principles of forming word are also different.In order to increase the Printing speed, we can adopt the working methods that many needles work simultaneously, the traditional various needle type is to adopt four needle or seven needles, the punching headerof various needles type need only the running system of one position, its running system can be controlled easily, its fonts can be controlled easily and be more beautiful, the speed is quick, this shorten the punching time. This simulating system adopts eight needle and straight arraying method.The design of Printing font is to adopt the trace points to realize the right express of fonts through the method that form the point array by the regular combination. The mission of the font design is according to the request of the marking words, adopt the less point number and the regular array, realize the quick print, the good visual effect at the same time, but can't cause the misunderstanding of identify. The punching word system of this experiment is not a real air cylinder system, but is a simulating show system that substitute air cylinder with LED.The computer control system is the core of control system. It decides the good and bad performances of control system. The present computer control system contain three kinds of constructions: the center control, the active and passive control and the distribute control. We adopt the main and subordinate control in this article.The control system in this design system includes the design of the main computer and the subordinate computer, the function of the subordinate computer is: to receive the data from the main computer through serial port and to guarantee the accuracy and integrality of the data. Complete the action of punching machine according to the data and inform the result to the main computer immediately. The function of the main computer is: to provide friendly man-machine interface by VC, to send the data to the subordinate computer correctly.This design adopt a...
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