A dedicated controller and control method for an electronic press-fitting machine

Abstract

The invention discloses a special-purpose controller of an electronic press, and a control method, and belongs to the field of equipment manufacturing. The controller comprises an ARM microcontroller and an FPGA, wherein the FPGA and the ARM microcontroller communicate through a high-speed bus; the ARM microcontroller is connected with an external sensor, a host computer and the like through interfaces for realizing high-speed acquisition and operation of pressure data, real-time monitoring and determining of a pressing process, real-time display of pressure and displacement, communication, system management and the like; and the FPGA is the core of motion control, is connected with a servo driver through a servo interface module, controls the speed, the accelerated speed, the torque, the displacement and the like of a servo motor by use of an embedded fuzzy nerve network PID special-purpose motion control algorithm under the cooperation of the ARM microcontroller, realizes accurate pressing and positioning, and carries out real-time monitoring and determining through a touch screen, and thus the quality of assembled products is improved.

Description

technical field [0001] The invention relates to a special controller and a control method for a pressing machine, belonging to the field of equipment manufacturing. Background technique [0002] In the production process of parts, it is a common method to use a press machine for assembly, such as shaft assembly, pin assembly, etc. Traditional mechanical, hydraulic or gas-hydraulic booster press-fitting equipment cannot meet the needs of enterprises for high-precision assembly in industries such as auto parts, electronics, and home appliances because the press-fit force and press-fit displacement cannot be accurately controlled. The electronic press-fitting machine uses an AC servo motor as the power source, and cooperates with the precision planetary gear reducer to drive the screw to realize product press-fitting. Its structure is as follows: figure 1 shown. The electronic press-fitting machine can not only produce accurate press-fit displacement and press-fit force, but ...

AI Technical Summary

Problems solved by technology

At present, most domestic electronic press-fitting machines adopt the PLC+servo system mode. Although the cost of this kind of electronic press-fitting machine is low, due to the weak performance of PLC motion control, the optimal control of the press-fitting process cannot be achieved, and the process adaptability and flexibility are poor; Due to their strong research and development strength, foreign companies mostly adopt the controller mode integrating control, detection and servo drive, which has stable performance and perfect functions, but the price is expensive; whether it is a domestic or imported electronic press-fitting machine, the judgment of the press-fitting result is passed It is realized by monitoring the pressure of several specific displacements, and it is impossible to display the pressure-displacement curve in real time, let alone fully reflect the pressure-displacement changes in the press-fitting process, which may cause unqualified products to flow into the market, although additional expensive special Pressure-displacement monitor or PC-based special pressure-displacement monitoring software system, but it will undoubtedly greatly increase the cost of the enterprise

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