Centering adjusting device and centering adjusting method for fan-shaped segment support of large square and round billet caster

The invention belongs to the field of forming equipment detection and relates to a centering adjusting device and a centering adjusting method for a fan-shaped segment support of a large square and round billet caster. The centering adjusting device comprises a fan-shaped segment III lower support centering template, a fan-shaped segment III upper support centering template, a fan-shaped segment II lower support centering template, a fan-shaped segment II upper support (sharing a base with the fan-shaped segment I lower support) centering template, a fan-shaped segment I upper support centering template centering template and a fan-shaped segment I upper trunnion simulating measuring rod. The centering adjusting templates are used for simulating fan-shaped segments to adjust centering of the fan-shaped segment supports and detecting whether the fan-shaped segment supports are adjusted in position or not by using a gradienter. The centering templates are simple in design and low in manufacturing cost. The cent