| 摘要 |
PURPOSE: A tensile testing device is provided to provide magnetic force on a magnetic grip unit when extending a fixed specimen, thereby preventing the specimen from being slipped from the magnetic grip unit. CONSTITUTION: A tensile testing device comprises a tensile driving unit(100) and magnetic grip units(130). The tensile driving unit is moved up to a direction where an upper body and a lower body are separated from each other, thereby extending the specimen by connecting the specimen to between the upper and lower bodies. The magnetic grip unit is embedded in the lower part of the upper body and the upper part of the lower body and fixes both sides of the specimen by inserting and controls the generation of magnetic force according to supplied power. |
