| 摘要 |
PROBLEM TO BE SOLVED: To efficiently evaluate an abrasion even when different kinds of materials are combined, by making the shape of the contact parts of a pair of part material test pieces to be identical and making the relative movement and sliding form to be identical. SOLUTION: For example, a contact surface (friction surface) 3 of a fixed test piece 1 that is formed in a cylindrical rod shape and a test piece 2 that is reciprocated is formed in the same rectangular shape, and axes AB and A'B' in parallel with a long side through the symmetrical center of each rectangle are allowed to cross each other at a geometrical center for reciprocated sliding in a direction CD where an angle formed by two axes is divided into two portions from the intersection with the intersection as the center. At this time, the intersection between the axes AB and A' and B' constantly moves on the CD axis due to the reciprocated sliding, and the contact surface of the test pieces 1 and 2 becomes equivalent. Therefore, by fabricating the test pieces 1 and 2 so that the same shape can be maintained even if the contact surface 3 is abraded, the relative position and move become identical even in the case of different kinds of materials, thus eliminating the need for exchanging the quality of material of the fixed test piece 1 and the movable test piece 2 and hence rapidly evaluating abrasion.
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