Punch Cnc Transformation And Automatic Feeding Device Developed

The stamping workpiece has a series of advantages with light weight, thin thickness,good rigidity and stable quality and so on. The stamping equipment has been widely used.But traditional punch control often adopts the contactor and relay control and the methodof sending material by hand, so problems exit in low efficiency, slow speed ,precision notbeing guaranteed and potential safety. Although purchasing the new equipment ofnumerical control may solve these problems, but the fund to be invested is greater, smallcompany is hard to bear. It will be a good method if we can carry out proper transformationand improvement for the original machine tool wihout changing its basic functions, whichwill not only economize fund but also make good use of original machine tool. Based onthis thought, overall transformation of the punch producing the meal box in CHANG ZHIKe Da trade company has been carried out.This paper will elaborate the process of designin detail.The design contains two main sections: the transformation of the original controlsystem and the development of automatically sending material installation. Our designthought is to detect the location of the head of punch by using near switch, handle and feedback the collected information to PLC controler, control put material motor and feedmaterial stepping motor driving the mechanical device to work with blow valvecoordinative by PLC controler, thus complete "put material—feeds material—die—blows" movement. Then we complete corresponding parameter show and selection,movement starting and stoping and other control opration by means of the touch-screenand finally feed related information back to the central control room and monitor systemby means of personal computer.This paper first introduces the background related to it and the meaning and source ofthis title, the definition of systematic scheme, overall composition and design thoughtand theoretical basis; then it carries out detailed design which includes tension controldesign, electrical control main circuit and supplementary circuit design, the resourceallocation of PLC controler, electrical connection, software program code, theconnected way of touch-screen, the design of control interface and etc; finally as forcommunication interface and last position machine it carries out detailed design thatincluds the connected way of "PLC—touch-screen—personal computer",communication agreement as well as detailed communication code.Running for three months, the debugged system has got great raising not only instability and reliability but also in system's precision and efficiency, at the same time ithas economized cost, reduced the personal risk factor and labour intensity and largelyraised automatization and modernization of the system. The control way "PLC—touch-screen—personal computer" put forward in this paper has the certain theoreticalresearch value in industry and the control process has higher reference and use significanceand has certain popularization and the actual meaning of application in the field ofindustry.