Control system of servo press
The servo press is powered by servo motors and uses ball screws as pressure transmission components. It is controlled by PLC and runs smoothly without any movement. Multiple intermediate stop points can be set, and different speeds and pressures can be set for each stroke. It has a continuously variable speed and completely overcomes many defects of existing pneumatic presses. The overall structure is simple, the design is scientific, and the production efficiency is high.
The servo press is mainly composed of a frame, a machine head, a worktable, a servo motor, a push rod, a pressure plate, and a control switch. The machine head is mounted on the upper part of the rack in a cantilevered manner, and a servo motor is vertically installed on the machine head. The lower end of the servo motor is coaxially connected to a push rod, and a pressure plate is installed at the lower end of the push rod. A worktable is fixed on the lower part of the rack, and the lower end of the servo motor is coaxially connected to the push rod through a ball screw. A control switch is symmetrically installed on the outer side of the worktable corresponding to the pressure plate, which is a linked two hand start button.
Servo press is one of the important equipment in manufacturing industry, and it is also the main forming equipment in modern information products, machinery, electronics, instruments and other industries. Traditional press machines have disadvantages such as low process possibility, complex structure, and manufacturing difficulties. With the development of mechanical processing and the improvement of forming technology, the development of press machines is moving towards high efficiency, high precision, high processing quality, and flexible manufacturing. The servo press combines the advantages of easy operation and stable operation of traditional presses, fully utilizing the controllability and digitization of servo motors, greatly improving the automation, flexibility, and processing range of the press.
The control system of the servo press: the output power port of the drive unit is connected to the servo motor, the output port of the motion controller is connected to the input port of the drive unit through SSCNET III high-speed optical cable and performs high-speed serial communication, the input terminal of the motion controller is connected to the expansion substrate, and the I/O mixing module, high-speed counting module for detecting the position of the slider, and analog-to-digital conversion module are installed on the expansion substrate; The PLC input terminal block and PLC output terminal block are respectively connected to the I/O hybrid module; The angle sensor is installed at the end of the press crankshaft, and its signal line is connected to the high-speed counting module to provide the crankshaft rotation angle signal to the high-speed counting module; The movable magnetic ring of the magnetostrictive displacement sensor is fixedly connected to the slider of the press, and its signal line is connected to the analog-to-digital conversion module to provide the displacement signal of the slider to the analog-to-digital conversion module. The control system directly detects the displacement of the slider, forming a closed loop with a detection resolution of up to 0.01mm.
As a new type of pressure machine, servo press has good controllability, meeting the processing requirements of high efficiency, high precision, and high flexibility, expanding the processing range and process, and improving the quality of stamping parts. It is the main trend in the development of press machines. The development of servo presses has promoted the further development of the press industry, enhanced the market competitiveness of the manufacturing industry, and achieved good economic and social benefits.
