How to accurately measure the length of spiral steel pipe is very important for spiral steel pipe manufacturers. After years of production experience, four methods for testing length have been summarized:
1. Improved encoder length measurement
This method is an indirect measurement method. By measuring the distance between the two end faces of the steel pipe and their respective reference points, the length of the steel pipe is indirectly measured. Set up one length-measuring trolley at each end of the steel pipe, with the initial position being zero and the distance L. Then move the length of the editor to the walking distance (L2, L3) of the respective steel pipe ends, L-L2-L3, which is the length of the steel pipe. This method is easy to operate, the measurement accuracy is within ±10mm, and the repeatability is ≤5mm.
2. Grating ruler length measurement
The spiral steel pipe manufacturer sets two fixed-length grating rulers on the outside of both ends. A rodless cylinder is used to drive the grating ruler close to both ends of the steel pipe, and the interference phenomenon of light is used to measure the length of the steel pipe.
3. Camera length measurement
Camera length measurement uses image processing to measure the length of steel pipes. The principle is to install a series of photoelectric switches at equal distances on a certain section of the steel pipe conveyor roller and add a light source and camera to another section. When the steel pipe passes through this area, the length of the steel pipe can be determined based on the position of the image captured by the camera on the screen based on a certain photoelectric switch.
4. Encoder length measurement
The principle is to install an encoder at the oil cylinder. The spiral tube uses the oil cylinder to push the steel pipe to move on the roller table. A series of photoelectric switches at equal distances are installed on the other side. When the steel pipe is pushed by the oil cylinder and the end of the pipe touches the photoelectric switch, the recorded code is recorded. The meter reading is used to calculate the stroke of the oil cylinder so that the length of the steel pipe can be calculated.
Post time: Feb-18-2024