A cutting head follow-up control system and method

Abstract

The invention discloses a cutting head follow-up control system, comprising: a main engine, a sensor module and a driving component. The main engine is electrically connected with the sensor module and the driving component respectively. Convert it into a signal and transmit it to the host. After the host receives the signal, it will give corresponding control instructions to the drive components. The sensor module includes a capacitance measurement unit and a temperature measurement unit. The capacitance measurement unit is used to detect the capacitance between the nozzle of the laser cutting head and the workpiece to be cut. Signal, the temperature measurement unit is used to detect the temperature of the capacitance measurement unit. The application improves the precision of the follow-up control, enables the follow-up control system to automatically alarm and stop when it is in abnormal operation, ensures the overall accuracy of the laser cutting operation, and facilitates the operator to store and store various data appearing in the follow-up control. Analysis and estimation can better monitor the use of the follow-up control system, which is convenient for later maintenance and management.

Description

technical field [0001] The present application relates to the technical field of laser cutting processing, and more particularly, to a cutting head follow-up control system and method. Background technique [0002] Follow-up control, also known as gap control, refers to controlling the laser cutting head and the workpiece surface to maintain a constant distance during the CNC laser processing process. That is to say, with the fluctuation of the workpiece surface, the laser cutting head should also adjust the position in real time. , to ensure that the distance between the two is constant. In the process of laser cutting, the distance between the nozzle of the laser cutting head and the workpiece to be cut is usually required to be within 1mm. Under the actual working conditions, the surface of the workpiece to be cut is uneven. Height adjustment is an important link to ensure the quality of laser cutting. [0003] The traditional laser cutting head servo controller general...

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Problems solved by technology

[0003] The traditional laser cutting head follower controller generally adopts the capacitive distance measurement method. The measurement principle is that a capacitance is formed between the nozzle of the laser cutting head and the workpiece to be cut. The capacitance value is related to the distance between the two, and the distance between the two is measured. The capacitance value can be used to calculate the distance between the two, but the calculation formula also contains the variable temperature, and at this stage, most capacitive sensors can only calculate the distance from the nozzle of the laser cutting head to the workpiece to be cut according to the change in capacitance. The distance between them ignores the influence of temperature on capacitance detection, and the existing follow-up control system fails to timely warn and record the performance of the system itself. Not in time and other technical defects

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