The Development Of Automatic Detection And Control System For Automatic Shearing Machine Of Plastic Christmas Tree Branches

Currently, due to the production of dragging machine, the length of the tail fly of plastic pine the company produced varies. As result, the location of where cutting pine branches must be based on the human eye to ensure, and the pine branches are cut manually. But, this method causes some problems such as low productivity, low passing rate of cutting off, too high strength of labor, and relying on workers, skillful. In response to these problems, the paper has developed an auto machine of cutting plastic Christmas tree,s pine. The content of this paper is to develop the detection on the auto machine of cutting plastic Christmas tree,s pine and its control system.The design of the detection on the auto machine of cutting plastic Christmas tree,s pine is the most difficult in the procedure of developing the device. Based on the large number of the analysis and research on the key point, which is also the difficulty of the paper, of the production process of producing plastic pine trees and of the accurate location on the tail fly of plastic strip, the paper concluded that the causes of detecting the tail fly of plastic pieces difficultly is that the location of the tail fly of plastic pieces is uncertain, and the detection's key point is to detect the position has changed whether significantly or no. To verify the feasibility of the sensor system and the optimal parameters of the detection system, the paper has taken a large number of experiments and improvement design on the detection system.The design of control system on auto machine of cutting pine is the core content of developing equipment. Based on the comprehensive analysis on the structure of auto machine of cutting pine, the considerations on process of production, the workplace's surrounding and the action's sequence of the machine, the paper clear the design steps of the control system in auto machine of cutting pine on plastic Christmas tree, and then summed up the requirements of control system on auto machine of cutting pine.According to the control requirement, the paper has selected the appropriate PLC,extension module, stepper motor and touch screen, and then put PLC as the core component while combing the stepper motors and other electrical components, and then select appropriate type of the control system's hardware. According to the I / O devices,the paper assign the PLC's I / O port for address. Based on the control requirements of cutting pine's process, the paper has designed the hardware circuit in control system( PLC main circuit and peripheral circuits), and completed the work of wiring hardware and the design of electrical control cabinet. Respectively, the paper usedPLC's programming software-- STEP7-Micro / WIN and touch screen's designing software-- EasyBuilder8000 to complete the PLC's program and the touch screen's design, and debugged related procedures in the laboratory and in the workplace.