| 摘要 |
PURPOSE:To measure a frictional force, which can be matched at the time of actual plastic working, by contacting the surface of a plate shaped sliding material with one surface of a plate shaped material under test, contacting a pressure piece with the other surface, and performing the friction test, with the plastic deformation of the material under test being carrier out. CONSTITUTION:The surface of a sliding material 2, which has the same quality as that of the molds for a plastic working device, is contacted with the surface of a plate shaped material under test 1. A pressure piece 3 made of a super alloy is contacted with the opposite side. Then a simulated plastic working part is formed. A specified compressing force is applied to the pressure piece 3. The material under test 1 is slidden with respect to the sliding material 2. At the same time, a specified relative sliding speed corresponding to the actual working is imparted between the material under test 1 and the pressure piece 3. The simulated working part is heated to a specified temperature corresponding to the actual working. Then, the friction force, which matches the actual plastic working, is detected by a load cell 4, and the coefficient of friction performance of lubricating oil, and the like can be measured. |
