APPARATUS FOR MEASURING FRICTION COEFFICIENT OF BOARD USING DRAW BEAD

摘要

PURPOSE: An apparatus for measuring the friction coefficient of a board is provided, which uses a draw bead and is improved in the precision of measured value. CONSTITUTION: A apparatus comprises draw beads (110,111) which bends and straighten a board; an imprint part (12) which imprints the board passed through the draw beads (110,111)at the set speed; a pressing part (13) which ascends and descends the roller stopping apparatus (111) of draw beads (110,111) to maintain the bended depth of the board constantly; and a body (140) where the pressing part (130) and the imprint part (120) are equipped. The friction coefficient of a board is measured by detecting the imprint weight (a, c) and the pressed weight (b, d) of the roller (111) by using the weight sensors (122,132) of the imprint part (120) and the pressing part (130) when the roller (111) of the draw beads (110,111) rotate freely.