Grinding chatter mark detection method for mill roll shaft neck

Abstract

The invention discloses a grinding chatter mark detection method for a mill roll shaft neck. The method comprises the following steps of: cleanly wiping the mill roll shaft neck, a grinding machine bracket and a support pillow, uniformly coating lubricating oil on the outer surface of the shaft neck and the bearing surface of the support pillow, placing mill rolls on a grinding machine, opening the grinding machine, and performing rotary grinding on the shaft neck, wherein the rotation speed is not less than 20rpm, and the rotation time is not less than 5min; visually checking the shaft neck and the support pillow in natural light, removing mill rolls with light and shade patterns on the outer surface of the shaft neck and / or mill rolls for forming light and shade patterns on the bearing surface of the support pillow, and feeding residual mill rolls into the next detection link as middle qualified products; and irradiating the outer surface of the shaft neck with a strong-light flashlight, and visually checking to remove the mill rolls with light and shade patterns on the outer surface of the shaft neck, thus obtaining the mill rolls without the light and shade patterns as final qualified products. According to the detection method disclosed by the invention, chatter marks on the surface of the mill roll shaft neck can be conveniently and accurately detected, and hidden dangers, such as surface scratches on the mill roll shaft neck, can be avoided, so that the surface of the mill roll shaft neck is effectively protected.

Description

technical field [0001] The invention relates to a detection aspect of roll grinding chatter marks, in particular to a method for detecting roll journal grinding chatter marks. Background technique [0002] The roll is the main tool for plastic deformation of (rolled material) metal, and is an important consumable part that determines the efficiency of the rolling mill and the quality of the rolled material. The roll is generally composed of three parts: the roll body, the journal and the roll head. The roll body refers to the middle part of the roll, which is directly in contact with the rolling piece and causes plastic deformation. It is the working part of the roll; the journal is the supporting part of the roll. , the roll is supported on the roll bearing by the journals on both sides of the roll body; the roll head is the part where the roll is connected to the connecting shaft. The roll does not need to have a special roll head, and only a lifting part for changing the...

AI Technical Summary

Problems solved by technology

[0005] However, there is currently no detection method specifically for the vibration marks on the surface of the roll journal

Under normal circumstances, experienced grinding workers can identify the existence of chatter marks by the reflection of light, but because the depth of the chatter marks on the roll journal is very small, it is difficult to detect most of the chatter marks with the naked eye

Some researchers proposed that the grinding chatter marks of the roll journal can be detected by referring to the detection method of the grinding chatter marks of the roll body, that is, using chalk, pressing the chalk on the surface of the roll journal, while letting the roll rotate, and drawing a picture through the chalk. However, this method requires inspectors to hold chalk, which is not very convenient to operate, and there is a hidden danger of scratching the surface of the roll journal due to impurities in the chalk

In addition, since the diameter of the roll journal is smaller than that of the roll body, the chatter marks are relatively much smaller, making its detection more difficult