introduction
When large-diameter bars need to detect multi-dimensioned wire diameters and ellipticity dimensions, manual detection takes time and labor, detection is not easy, and on-line non-contact detection can improve detection efficiency and bar quality. Therefore, it is necessary to develop large-diameter and multi-directional bearings. Non-contact on-line testing equipment for testing, developed LPBJ250.4 rod diameter measuring instrument to realize the four-direction detection and ellipticity detection of large-diameter bars.
1, bar diameter measuring instrument
LPBJ250.4 bar gauge is a non-contact on-line testing equipment, mainly used for on-line detection of bar outer diameter of metallurgical industry. The data measured by this equipment is objective, good real-time, and the measurement results are kept intact. It is suitable for quality monitoring of production lines. And production process analysis.
2, the principle of measurement
Diameter gauge is a measuring device integrating optics, mechanics, electronics and computer technology. It uses optical projection and CCD measurement principle to quantitatively measure the profile size of the measured object during rolling.
Each probe of the diameter measuring instrument consists of a light source, an optical path system, a light sensing unit, and a signal acquisition and calculation system. The light source uses a special LED. The light path system adopts a collimated parallel light optical structure with a parallel light tube, and the light sensing unit adopts high Frequency and high resolution linear CCD. The light source forms a parallel beam through the optical path system. The field of view encompassing the parallel beam is the measurement range. When the object to be measured passes through the range, an image is formed on the CCD photosensitive surface, and the corresponding calculation is performed. , Get the outline size of the measured object.
3, bar diameter measuring instrument
The standard configuration of bar gauges includes: Measurement car (caliper body), main control cabinet, distribution box, LED display, high pressure blower and air filter.
The basic measurement function is completed in the measurement vehicle. Standard industrial interface communication and optical fiber transmission are adopted between the measurement vehicle and the host computer. The detected data are displayed on the main control computer display and on-site large LED screen.
Rod gauges are equipped with 8 sets of double-barrel probes, 8 sets of double-barrel probes consist of 4 measuring units, which can measure the level of rolled bars, and are inclined at an angle of 25° to the horizontal and vertical lines. Dimensions. Each pair of twin barrel probes consists of 2 sets of 70 single probes. The single probe consists of a parallel light emitting unit and an optoelectronic receiving unit. The emitting unit contains a special LED light source, and the receiving unit is a data acquisition and processing system. The data obtained is transmitted to the host computer via optical fiber communication.
The measuring car is equipped with a threaded lock-on and off-line positioning and locking mechanism, which can be quickly positioned when measuring the car on-line.
The measuring car is connected to the high-pressure fan through the pipeline. The high-pressure blower continuously delivers clean cool air to the measuring car. This ensures that the photoelectric element inside the measuring car is at an effective working temperature and also blocks dust such as water fog and oxide scale on the rolling line. Outside the measuring car.
4, technical parameters
Measuring range: 60~250mm
Allowable deviation: ≤ ±0.03mm
Repeatability: ≤±0.01mm
Measurement frequency: ≥500Hz
Display content: Real-time display of measurement data, curves and defects, display response time is less than 0.2 seconds.
Display: Outer outline dimensions, maximum, minimum, average, ellipticity and cross-sectional views of the measured object in four directions at the same time, dimensional fluctuation trend plot, defect analysis plot.
Field LED display: Measurement data at the same time, the maximum value, minimum value, ellipticity and equipment operating status. The display frequency is 0.66~3 times/sec.
Conclusion
Bar gauges have a variety of functions and can display detailed information required for the process. They can solve the problems encountered in various measurements of wire rods. Improve the level of automation in enterprises, improve the finished product rate, online for rod and wire size Measurement and control provide a good basis.
This article consists of Baoding Lanpeng Measurement & Control Technology Co., Ltd. write
