straightening machine is a device for straightening metal profiles, bars, pipes, wires, etc. straightening machine squeezes bars, etc. through straightening rollers to change their straightness.

　　Straightness is one of the important properties of bar quality. Many bar manufacturers are equipped with straightening machines to ensure that the straightness of bars is qualified, but it is not guaranteed that every bar that goes through straightening machine is qualified. This requires the rod through the straightening machine to be tested, after testing, qualified products can be put into the next process, unqualified products need to rework through the straightening machine.

　　When it comes to straightness measurement, in the automatic production line, the natural online straightness measuring instrument can provide help for detection, for this reason, this type of measuring instrument has been developed, and has been applied to various manufacturers, and has been tested in practice.

　　The on-line straightness measuring instrument is a device that can be installed in the production line for on-line automatic testing. After being installed directly in the straightening machine, the measured bar passes through the straightening machine for automatic dimensional testing. And it can detect all kinds of long materials that exceed the length of the straightness measuring instrument.

　　The online straightness measuring instrument can detect a data every other length of the straightness measuring instrument, and the rolled material to be measured is an uninterrupted advance, and the measuring instrument is also an uninterrupted detection, which can detect the straightness size of the whole rolled material at different positions, and can also calculate the overall straightness size of the measured bar.

　　Of course, in addition to straightness measuring instrument, it also takes into account the detection of outer diameter size. If it is a two-axis straightness measuring instrument, it can also detect and calculate the ellipticity size, which can detect multiple dimensional information through straightening machine, with a large amount of detection data and better practicability.

　　At present, the detection frequency of the commonly used online straightness measuring instrument is 500Hz, and the detection accuracy is better than 0.08mm. If the standard is reached, the conventional measuring instrument can be used for measurement. If the demand is higher precision and higher detection speed, the intelligent straightness measuring instrument can also be customized.

　　Of course, the online straightness measuring instrument can not only be installed after the straightening machine, any position that needs to be tested, and the installation port of the measuring instrument is reserved, can be tested online. Even in harsh working conditions, good protection can also enable the measuring instrument to complete high-precision dimensional detection.

　　Leveling process of straightening machine

　　The difference between the straightening machine and the leveling machine