Core rod support roller height measuring rule and measuring method thereof

Abstract

The invention provides a mandrel support roller height measuring ruler. The measuring ruler includes a measuring ruler beam, which is respectively connected with a measuring ruler column at both ends of the measuring ruler beam to form a U-shaped frame. Measuring base. At the same time, it also provides a method for measuring the height of the mandrel support roller with the measuring ruler. The steps are: ① place the measuring ruler on the rack slide rail; ② control the height of the mandrel by lifting the supporting roller; The distance between them is adjusted to the set value of the height H of the mandrel support roller of this specification. The effect of the invention is that after using the measuring ruler, the accuracy of measuring the height of the mandrel support roller is improved, the mandrel is in normal use, and the steel consumption per ton reaches and exceeds the original design level. The method of measuring from above reduces the disadvantage of scalding the arm, eliminates the possibility that the mandrel support roller suddenly fails and causes serious injury to the measuring person's arm, and improves safety. The measurement method is relatively simple, practical, safe, accurate and fast.

Description

technical field [0001] The invention relates to a detection tool in steel pipe production, in particular to a mandrel support roller height measuring ruler and a measuring method thereof. Background technique [0002] The mandrel is one of the main deformation tools of the Φ250MPM limit-stop mandrel continuous pipe rolling mill in the pipe mill. It has always been imported, and it is expensive, and its consumption accounts for 60% of the rolling cost. Rational use of mandrels to fully increase the service life of mandrels is one of the important tasks to reduce production costs. [0003] The height of the mandrel support roller is the main link to ensure the normal use of the mandrel. When the height adjustment accuracy of the mandrel support roller is not up to the standard, the consumption of the mandrel will increase and the inner surface of the steel pipe will easily have inner edge defects. The original design of the mandrel support roller height measurement is to meas...

AI Technical Summary

Problems solved by technology

When measuring, the mandrel is placed on the mandrel support, and at least two people are required to cooperate. One person uses a ruler against the bottom surface of the rack slide rail bed, and the other uses an inner card to measure the distance between the ruler and the mandrel (that is, the tooth The distance between the bottom surface of the rack bed and the mandrel), when measuring, two people must extend their hands under the rack slide rail and the mandrel from the gap between the slide rail and the mandrel. Generally, the temperature of the mandrel is at At around 100°C, scalding accidents are prone to occur during work, and if the mandrel support roller suddenly fails, it will cause serious injury to the measuring person's arm

The accuracy of this measurement method is poor, because the slide rail has been exposed to cooling water, oil and dust erosion for a long time, and the capillary temperature is more than 1000 degrees. After the diameter of the mandrel is increased after the pass type modification, the gap between the slide rail and the mandrel becomes very small, and the arm can no longer reach below, so it is very difficult to measure the height of the mandrel support roller

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