Pinch roll unit for underground winding machine and with adjustable offset distance and its adjusting method

Abstract

The invention discloses a down coiler pinch roller device with adjustable offset distance. Its two pinch rollers arranged up and down, the connection between the supporting mechanism of at least one pinching roller and the frame is adjustable, and the supporting mechanism of the pinching roller is adjusted through the offset adjustment mechanism to make the two pinching rollers The parallel relative displacement in the horizontal direction forms different offset distances, so that strips of different thicknesses and materials can form roughly the same bending radius that meets the requirements of the coiler, and the strip head can enter the coiler smoothly The coiling is carried out between the reel of the coiler and the No. 1 auxiliary roll to avoid or reduce the impact of the strip head on the reel, guide plate and auxiliary roll of the coiler.

Description

technical field [0001] The invention relates to an undercoiler on a strip hot continuous rolling line and a thin slab continuous rolling line in the metallurgical industry, in particular to a pinch roller device for an undercoiler with an adjustable offset distance. Background technique [0002] So far, the pinch roll device of the down coiler (thickness of the coiled strip steel is 0.8-25mm) at home and abroad has adopted two structural forms: one is the upper pinch roll The vertical motion adjusts the roll gap directly, and the lower pinch roller is fixed; the other is the swing type in which the upper pinch roll swings to adjust the roll gap, and the lower pinch roll is also fixed. These two structural forms only adjust the size of the roll gap to pinch strips of different thicknesses, while the offset e value of the upper and lower pinch rolls (the horizontal center distance of the upper and lower pinch rolls) is fixed. [0003] After searching, Japan [Open Patent Gazet...

AI Technical Summary

Problems solved by technology

The relative position between the pinch roller and the reel of the coiler determines that the bending radius of the strip is only within a certain range (determined by the gap between the reel and the No. 1 auxiliary roll), and its head Only when it is aligned with the gap between the reel of the coiler and No. The gap between the auxiliary rolls is used for coiling, and it will impact the reel, guide plate and auxiliary rolls of the coiler, shorten the life of the equipment, and affect the quality of the strip head

If the value of offset e is variable, it depends on how the offset changes. According to the previous analysis, the thicker the strip, the larger the bending radius. In order to keep the bending radius constant, the thicker the strip, the smaller the offset should be. , that is, the offset should be inversely proportional to the thickness of the strip; obviously, the above-mentioned "hot rolling equipment" offset changes in the opposite direction, which will only make the bending radius more likely to exceed the allowable range of the coiler, and aggravate the above-mentioned adverse consequences

Images