| 摘要 |
A tri-axial bending load testing jig includes a die including first and second supporting axes which upholds opposite sides of a board material, the first and the second supporting axes movable so that an interval therebetween can be adjusted according to a size of the board material, a punch mounted at an upper part of the die movable in a vertical direction to press down a center portion of the board material, a punch setting unit formed in the center of the die to set the center and parallelism of the punch with respect to the first and the second supporting axes and having a punch groove for receiving the punch at the center portion of the die, and a material positioning unit guiding a position of the board material to be put on the first and the second supporting axes, according to the size of the board material.
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