1. Laser measurement principle and system composition
Laser measurement technology is based on the characteristics of laser such as high precision, high directivity and high coherence. In the precision detection of open single point high precision punching machine, the commonly used laser measurement principles include laser interferometry and laser triangulation. Laser interferometry determines the displacement and position change of the moving parts of the open single point high precision punching machine by measuring the change of interference fringes of the laser beam, and its accuracy can reach sub-micron level or even higher. The laser triangulation method uses laser to illuminate the measured surface of the open single point high precision punching machine and calculates the displacement of the object by measuring the angle change of the reflected light. The detection system built based on these principles is mainly composed of laser transmitter, receiver, signal processing unit and data display and storage unit. The laser transmitter emits a laser beam and irradiates it to the measuring points of key components such as the slider and workbench of the open single point high precision punching machine. The receiver receives the laser signal after reflection or interference. The signal processing unit processes and analyzes the signal and converts it into the displacement, velocity, acceleration and other parameters of the open single point high precision punching machine. Finally, the data display and storage unit intuitively displays and stores these parameters for subsequent analysis and evaluation.
2. Determination of measuring points and measuring parameters
In order to comprehensively and accurately detect the accuracy of the open single point high precision punching machine, it is necessary to reasonably determine the measuring points and measuring parameters. The measuring points are usually selected on the motion trajectory of the slider, the key position of the workbench, and the connection part of the transmission mechanism. For example, multiple measuring points are set on the slider to monitor its straightness, parallelism, and perpendicularity to the workbench during the up and down movement. For the workbench, the measuring points are distributed in different areas to detect its flatness and stability during the stamping process. The measurement parameters include displacement accuracy, that is, the deviation between the actual displacement of the open single point high precision punching machine slider within the stroke and the set displacement; speed uniformity, to examine whether the slider speed remains stable during the movement; and acceleration change, to analyze the acceleration characteristics of the slider when it starts and stops. Through the precise measurement of these measurement points and parameters, the geometric accuracy, motion accuracy, dynamic accuracy and other performance indicators of the open single point high precision punching machine can be comprehensively evaluated.
3. Data processing and accuracy evaluation method
After obtaining the laser measurement data, effective data processing and accuracy evaluation are required. Data processing must first filter and reduce noise on the original data to remove abnormal data generated by environmental interference, electrical noise and other factors during the measurement process. Then use appropriate mathematical models and algorithms to fit and analyze the data. For example, the displacement data of the slider is fitted with a straight line using the least squares method to calculate its straightness error. The accuracy evaluation method is to compare the measured parameters with the design accuracy standard of the open single point high precision punching machine. If the positioning accuracy design requirement of the open single point high precision punching machine is within ±0.01 mm, and the actual measurement result is within this range, it means that the open single point high precision punching machine meets the requirements in terms of positioning accuracy; if it exceeds the range, it is necessary to further analyze the causes of the error, such as wear of mechanical parts, assembly errors, control system failures, etc., so as to take corresponding improvement measures, such as adjusting mechanical parts, optimizing control system parameters, or performing equipment maintenance and maintenance.
4. Advantages and application prospects of the system
The open single point high precision punching machine precision detection system based on laser measurement technology has many advantages. It has extremely high measurement accuracy and can meet the stringent requirements of open single point high precision punching machine precision detection. Compared with traditional measurement methods such as micrometer measurement, its accuracy can be improved by several times or even dozens of times. At the same time, the system has the characteristics of non-contact measurement, which will not cause wear or interference to the moving parts of the open single point high precision punching machine to be measured, and can perform real-time measurement during the normal operation of the open single point high precision punching machine without affecting production efficiency. In terms of application prospects, with the growing demand for high-precision stamping products in the manufacturing industry, this high-precision detection system will play an increasingly important role in precision detection and quality control of open single point high precision punching machines in many fields such as aerospace, automobile manufacturing, and electronics industry. It will help improve the quality stability of stamping products and the reliability of the production process, and promote the entire manufacturing industry to develop towards higher precision and intelligence.
