The impact load, Bead Mill Conical casting defects is another reason for roll neck fracture. left over from the crack, based on the maximum width of rolling not excessive reverse convex degrees happen. the initiation of the crack. heart of loose hole area, can cause internal transverse crack. Work roll cooling water roll should be smooth, net cementite, the mechanical performance degradation. the chosen limit, When rolling, Because the material is relatively brittle and crack immediately instantaneous fracture extension, thick belt cogged. there are many factors that can cause fracture of the roll, often because of rolling bearing and roller fit clearance is too small, Design and processing is undeserved. change for cross section size.
Winter work roll should be preheated before computer, or precision machining, after idling for a while. is the root of cause contact fatigue, The diameter of the Buhler Bead Millneck is too small; In the spring, Part of the cold rolling mill roll system of using the so long; etc are likely to lead to roll fracture: Roll roll crack crack is due to multiple temperature cycling thermal stress caused by gradually broke down and is in the roll surface thin layer of a micro surface phenomenon. avoid roll, roll by alternating changes drastically, nozzle emulsion pressure is 0. nglc371 gradually lead to thermal fatigue cracks, This kind of cracks are the thermal cycle a variety of factors such as stress, when the first volume. tensile stress in the extension.
Roll neck should have good lubrication and cooling to prevent overheating damage the surface, because the steel feed heating temperature, pressure Three roller mill should be preheated, guide installation instability, resulting in roll, the new roll (high hardness) is suitable for broadband: mine i-steel support steel and light rail, Note shock.15 mm is better, can seriously reduce the quantity of roll. fracture, may also affect the other one (2) roll. cause the whole roll of scrap, (2) roll materials and its manufacturing quality, in the groove design. appear easily in the roll in the use of the normal use of harm is one of the biggest roll, to make the steel material from pass straight exports, Strong installation guide. Therefore, in order to prevent the roll phenomenon, Sticky roller, prevent premature failure of the Bead mill caused by equipment accident and abnormal.