Thread Content
For production, the ability to perform high-precision online detection of the diameter of round bars is an essential factor in ensuring quality; the commonly used method for detecting the outer diameter is the multi-axis photoelectric detection technique. The photoelectric rod diameter measuring instrument was chosen because it operates in a non-contact mode and incorporates various protective measures; it enables online inspection of round rods manufactured in harsh environments such as those with high temperatures or heavy dust and mist, and it can blow away iron oxide scale to improve measurement accuracy. The diameter measuring instrument for bars boasts high precision, generally exceeding 0.02 mm, with slight variations depending on the measurement range, thus meeting the inspection requirements for various types of bars. At the same time, its detection frequency reaches 2000 Hz, meaning 2000 data points are detected per second, which fully meets the requirements of various high-speed production lines. A TCP/IP standard industrial interface and optical fiber transmission are used between the measuring instrument and the host computer, with the detection signal display sent to the industrial computer in the main control room ； A TCP/IP standard industrial interface and optical fiber transmission are used between the on-site LED display screen and the industrial computer ； The LCD display terminal in the control room shows content in synchronization with the on-site LED display. It can reflect the dimensional changes of the rolled products in real time, enabling the personnel on site to adjust the rolling mill or die sets promptly. Purpose of dynamic acceptance: To assess the measurement deviations of the equipment under normal steel passing conditions. Measuring tool: Micrometer (within its calibration validity period, the allowable deviation is ±0.01mm). Test piece: Finished rolled products – Requirements for selecting measurement data: When using a verifier for measurements, deviations caused by surface roughness should be excluded. Measurement outliers caused by scale on rolled products, surface discontinuities, or other defects should be considered invalid data. Method: Three samples of different sizes were selected (with the defective ends at both the start and end removed); 10 sampling points were taken for each size, and the averages were calculated and recorded. Then, the average value of the device’s measurement data is used for comparison. When the compared data falls within the specified measurement deviation range, it is considered passed. Dynamic detection is the common method of using bar diameter measuring instruments in round bar production lines; therefore, dynamic acceptance is very important at the time of delivery, to adjust the measuring instrument to an appropriate working condition based on the actual production conditions on site. High-precision online testing can be carried out only when in use. Practice has shown that the use of a rod diameter measuring instrument leads to significant improvements in quality, efficiency, and profitability, and it is very effective in reducing waste of raw materials and defective products.