Cutting head follow-up control system and method

Abstract

The invention discloses a cutting head follow-up control system. The system comprises a host, a sensor module and a driving assembly, wherein the host is electrically connected with the sensor moduleand the driving assembly separately, the sensor module is used for measuring physical characteristics of a laser cutting head nozzle, converting the physical characteristics into signals and transmitting the signals to the host, the host sends a corresponding control instruction to the driving assembly after receiving the signals, the sensor module comprises a capacitance measuring unit and a temperature measuring unit, the capacitance measuring unit is used for detecting capacitance signal between the laser cutting head nozzle and a to-be-cut workpiece, and the temperature measuring unit is used for detecting the temperature of the capacitance measuring unit. According to the follow-up control system, the follow-up control precision is improved, the follow-up control system can automatically give an alarm and stop in case of abnormal operation, the overall precision of laser cutting operation is guaranteed, an operator can conveniently store, analyze and estimate all data appearing infollow-up control, the use condition of the follow-up control system can be better monitored, and maintenance management in the later period is facilitated.

Description

technical field [0001] The present application relates to the technical field of laser cutting processing, and more specifically, 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 to maintain a constant distance from the workpiece surface during CNC laser processing, that is to say, as the workpiece surface fluctuates, the laser cutting head must also adjust its position in real time , to keep the distance between them constant. In the laser cutting process, the distance between the nozzle of the laser cutting head and the workpiece to be cut is usually required to be within 1mm. Under 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 follower controller generally adopts the capacitive distance measure...

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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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