Narrow Results

Hot stamping processes of high strength steel require that speed and pressure of forming equipment can be adjusted flexibly and accurately. Mechanical link servo press adopts servo direct technology to adjust the slider movement and output pressure flexibly and provides faster cycle times at lower costs. Therefore it is a kind of ideal equipment for complex hot stamping processes. This paper presents a method of performance evaluation for mechanical link servo press. A series of repeatable testing methods are used to detect and evaluate the key performances of mechanical link servo press, such as BDC precision, pressure holding capacity, production efficiency and power consumption. In this paper, the performance evaluation method is used to detect and evaluate the mechanical link servo press on hot stamping line. The experimental results show that a well-performed mechanical link servo press must have high performances like high BDC precision, high pressure holding capacity, high production efficiency and low power consumption.

Automobile parts manufacturers are cooperating with automotive companies in the early development of high performance metal sheet forming technology. For the early development of high strength steel / high strength aluminum material, especially the mechanical properties test of the material after forming, it needs a test line with large range of working parameters and flexible operation. In order to accurately obtain the physical parameters of the change of the material in the forming process, it is necessary to ensure that the control center needs the position of the slider movement of the press and the ability to perceive the exact data of the forming force of the material during the forming process. The process data acquisition and analysis of the production line has tended to the mode of big data to meet the needs of intelligent decision making. When the intelligent process system is connected to the platform of the industrial Internet, the production process of the hot forming production line in the production workshop of various places can be monitored at any time, and the early intelligent manufacturing workshop or factory can be realized.

In order to solve the problems of servo press control system precision about large inertia and low precision, the controlling theory of fractional order PI^λD^μ and the digital realization of fractional order controller had been proposed, which based on the slide motion characteristics. The design flexibility, the system stability and controlling effect of traditional integer order PID controller can be improved with the application of the fractional order calculus of fractional order controller. The press position servo system model was established in Matlab/Simulink to verify the controlling effect of fractional order controllers. The simulation results show that the controlling effect of fractional order PI^λD^μ controller was better than traditional integer order PID controller.