Method and controller for controlling position, pressure measurement and safe control of sliding block of forging machine tool

Abstract

The invention discloses a method and a controller for controlling the position, the pressure measurement and the safe control of a sliding block of a forging machine tool. By the method, the position detection and the pressure monitoring of the sliding block are integrated into a whole; meanwhile, the position and the pressure of the sliding block can be acquired; the position corresponds to the pressure to obtain a position-pressure curve according to the time; the position-pressure curve obtained by multiply acquiring position and pressure data during normal processing is set to be a standard curve; the quality of products can be controlled and production personnel are prompted to find the reasons of faults by using the curve; the controller carries out double-circuit output on control output; double circuits are connected in series; and the controller transmits a control signal to a motor of a numerical control machine tool and automatically adjusts the motor speed according to preset value. The invention integrates the position monitoring of the sliding block and the pressure monitor of the machine tool into a controller and realizes multifunctional control by combining automatic speed regulation, alarm and the like; meanwhile, the invention realizes the quality control of products and the safe and accurate control of the machine tool.

Description

technical field [0001] The invention belongs to the technical field of numerical control and relates to a controller, in particular to a method for measuring the position and pressure of a slide block of a forging machine tool and a safety control method and a controller. Background technique [0002] The controller is the core control component of the CNC system, and its performance directly affects the usability, safety, reliability of the whole machine, as well as the operating rate and maintenance amount of the equipment. At the same time, more and more emphasis is placed on safety, reliability and efficiency in the control of machine tools, because it is not only related to production efficiency, but also related to the safety of life and property. Therefore, the security of the control system has been widely valued, and the CNC system with integrated security functions will become the main trend in future applications. [0003] Such as figure 1 As shown, the pressure...

AI Technical Summary

Problems solved by technology

[0003] like figure 1 As shown, the pressure monitoring function of the traditional CNC machine tool is to connect the A / D module through the pressure sensor and the tonnage meter PTM (PressTonnage Monitor) to connect to the PLC, and then through the external host and touch screen, because the position measurement and the pressure measurement are not in the For the same unit, the corresponding relationship between the position of the slider and the pressure cannot be strictly time-corresponded, and the pressure is different at different positions. Therefore, this method can realize the function of monitoring the maximum pressure in a cam interval, and cannot realize the function of monitoring any position of the slider. pressure monitoring

Moreover, the high cost of adding A / D and touch screen system modules to PLC is not conducive to popularization

[0004] The traditional speed control of the main motor generally controls the main motor by manually adjusting the potentiometer on the panel. This speed regulation method has large errors, low fine-tuning accuracy, and inconvenient speed regulation.

[0005] The existing controller controls the clutch part with a single output, which does not consider the failure of the safety function caused by a single point of failure. If the cam output circuit fails during the operation of the machine tool, it may cause the machine tool to lose control and endanger personal safety.

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