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Dynamic Simulation and Experimental Study on Knuckle Servo Crank Press

Author: FangYa
Tutor: SunYouSong
School: Guangdong University of Technology
Course: Materials Processing Engineering
Keywords: Servo drive Mechanical presses AC servo motor Numerical simulation
CLC: TG305
Type: Master's thesis
Year: 2011
Downloads: 124
Quote: 2
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Abstract


Traditional mechanical press drive system and more used for the connecting rod, transmission system increased force than the small motor power required, which restricts its development. AC servo motor to replace the ordinary asynchronous motor is the development of a new trend forming equipment field. Servo press is generally no flywheel, working pressure depends mainly on the instantaneous torque of the motor, thus driving the motor capacity is much greater than ordinary presses, which leads to the high cost of equipment has become a major obstacle in the promotion and application of the servo press. Therefore, the development of new transmission mechanism has become one of the important content of the current servo driven presses technical development, at the same time, the technology can also be applied to the ordinary motor-driven presses, to achieve energy saving. The project is widely used in the manufacturing of mechanical presses, AC servo drive technology, combined with computer control technology to traditional crank rod presses into intelligent energy-saving toggle crank press. This paper studies the content as follows: (1) by comparing several commonly used transmission mechanism design the triangle connecting rod - Toggle institutions, and UG software to create the geometric model. (2) the kinematic and dynamic analysis of the the triangle connecting rod - a toggle mechanism, and the load torque of the motor shaft and the equivalent moment of inertia is calculated, the establishment of a dynamic mathematical model of the kinematics and dynamics. (3) the establishment of a numerical simulation of the press during exercise toggle servo crank presses electromechanical system dynamic simulation model based on MATLAB / Simulink simulation module, and in accordance with the prototype parameters. Stamping process, established in accordance with the actual conditions typical process ordinary stamping, mute punching, high-speed sheet punching, grading suppression, precision imprint on the typical process numerical simulation to predict system parameters under various process conditions. (4) establishment of the kinematics simulation models of several common transmission mechanism, and comparative analysis of simulation results, and thus prove the triangular rod - a toggle mechanism is the preferred transmission mechanism. (5) experimental studies to validate the numerical simulation is consistent with the experimental results confirm the validity of the simulation model. (6) the the Presses performance analysis (including electricity, force, motion parameters, energy consumption, etc.), the press drive system to suggest improvements. The research results show that both the results of the numerical simulation and experimental study is very consistent, confirmed the correctness of the mathematical simulation model, toggle servo crank presses AC permanent magnet synchronous servo motor instead of the main drive of the the ordinary asynchronous induction motor as press , can solve the shortcomings of their operating characteristics are not adjustable, thereby increasing the working performance of the mechanical press, broadening the applicability of craft; AC servo press can be realized the slider any working curve, to achieve a flexible working characteristics. Mechanical efficiency 23.9% 56.5% energy saving than ordinary presses through simulation available servo press; simulation comparison of three common transmission mechanism analysis, the results showed that the slider-crank mechanism, isometric elbow rod institutions compared triangle connecting rod - a toggle mechanism with increasing force higher than and better quick return approximate stop characteristics, not only can improve the performance of the servo mechanical presses, but also to reduce the manufacturing costs. This article by AC servo crank press electromechanical systems numerical simulation to predict system parameters under various process conditions (current, voltage, speed, acceleration, etc.), can be any process under the curve of the dynamic motor parameter changes, this can The implementation of a variety of stamping process provides the basis of the motor dynamic input to make the crank press in order to adapt to the specific process uses best performance.

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Metal pressure processing > General issues > Pressure processing equipment
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