rolling mill roll gap adjustment

In steel rolling production lines, copper alloy bushings serve as critical foundational components that carry rolling forces and ensure equipment precision, with their performance directly determining mill availability and product quality. Whether in hot or cold rolling processes, rolling mill bushings must withstand enormous radial and axial loads, impact loads during bite-in, and thermal cycling stresses from alternating high temperatures and cooling water. Taking the short-stress-path rolling mill as an example, the stress state of bushings in the roll gap adjustment mechanism directly affects the spatial position stability of the rolling line—bushing wear or fixing bolt fracture leads to pull rod sagging and rolling line deviation, subsequently causing surface defects such as head warping, scratching, and folding, and in severe cases, even resulting in major equipment failures such as rolling mill bearing burnout and abnormal roll wear. Therefore, material grade selection, structural parameter design, lubrication method matching, and manufacturing process control of bushings all directly relate to mill operational reliability and product dimensional accuracy.