When the drum is processed the holes which is placed on the turning rolls

it will cause slight running and turning

thus affect to the direction and position precision of machining hole

due to the thinckness of the plate and the effect of drilling force.In order to ensure the processing quality of the hole on the drum

it is necessary to make process holes on the drum which can’t roll on the turning rolls.This paper introduces a device which is simple and practical

simple operation

low cost and it can effectively prevent the drum in the roller shelf when machining hole won’t produce rash move and rotate the stop.