Application of SIMOTION D435 on friction stir welding machine
YANG Ji-dong1，LIN Zheng2，LIN Jun-qiang1
（1. School of Mechanical Engineering，Chongqing University，Chongqing 400044，China；
2. Chongqing Institute of Optics and Mechanics，Chongqing 401123，China）
Abstract：Aiming at the low independent research and development level of friction stir welding equipment in our country so far，most ofthem are only designed to achieve one-dimensional linear motion or not be constant pressure controlled，therefore，a set friction stirwelding equipment which can both achieve two dimensional curve and do constant pressure control was designed. Through the analysis ofthe control elements and welding principle of friction stir welding，the SIMOTION D435 control scheme was selected after the comparisonofvarious control schemes. Based on the analysis of the desired functionthemodularprogrammingmethodandtheintegrated use methodof MCC language and LAD language were used in the controlprogram.Then the two-dimensional interpolation and pressure PID controlof friction stir welding were realized，and the pressure control accuracy and feed axis positioning accuracy experiments were carried out.The results indicate that the system runs stably and can achieve a high pressure control precision；it is suitablefor 2D plane friction stirwelding of light alloys such as aluminum and magnesium alloys.
Key words：SIMOTION D435；friction stir welding；two-dimensional interpolation；PID control