An Automobile Welding Line Electrical Control System

With the rapid development of automobile industry and Consumers Improve the quality of consciousness, Increasingly high demand for automobile quality, Automobile production increasingly efficient, Level of automobile welding equipment also improved rapidly, Which is characterized by increasingly high degree of automation.Based on a welding production line of car model, Design and build welding control system based on fieldbus, Welding production line is mainly composed of bottom body line, Left and right side panel line. Each sub-line is mainly composed of welding fixture、conveying mechanism、handling car and so on. The basic control principle:PLC as the control core, The system use Siemens S7-300 Series PLC, Use a touch screen as an terminal of monitor and input, PROFIBUS fieldbus connect PLC and each slave station, Each station connection with the signal switches, solenoid valves, buttons, lights, etc, To control the welding fixture, conveying mechanism, automatic welding equipment etc. Handshake between sub-line PLC via by DP/DP Coupler.Each station has automatic and manual mode selection switch、models selector switch、fixture operation buttons, System design both automatic and manual modes of operation, produce four kinds of car models, Fixture with automatic clamping and manual clamping step function.system design has HMI,in order to monitor the operating status of each device and technical parameters.Control system mainly includes the following aspects:PLC control system hardware design、Input-output circuit design、Network communication design、PLC program design、HMI design.Has been used in the actual production of the a domestic car model welding line, System is running stable and reliable.