Roughness Tester Using Diaphragm Type Air-Micrometer

抄録

Two types of roughness testers using a "diaphragm type air-micrometer" were made for trial : "cylinder wall roughness tester" and "small portable roughness tester". The mechanism of this tester is as follows : The displacement of the tracer point which traces on the surface to be measured is changed into a pressure indicated by an air-micrometer and this pressure acts on air chambers. A small magnetic needle rotates correspondingly with an action of the air chambers. The torque of the magnetic needle is amplified by means of an air type torque amplifier coupled with the magnetic needle magnetically. Thus roughness is recorded with a recording pen operated by the air type torque amplifier. With the surface profile assumed to be sinusoidal, the characteristics of this tester were discussed. Various tests show that roughness can be accurately recorded by this tester.