抄録
Spark test is a test for examining compositions of steel such as the amount of containing carbon and that different materials are not mixed.The spark test is made by a skilled person who grinds an end surface of the steel using a hand grinder to determine the contained material by watching the shape and density of the spark.Technical tradition of the spark test is one of the severe concerns in production sites due to aging population.It is important to quantify the grinding operation for technology education and automation.We designed and fabricated the experiment equipment with force and torque measurement device.We derive a formula to calculate the force on the test piece surface based on statics analysis from the force and torque measured by the sensor.Also we analyzed difference of the calculated force on the end surface of the test piece between a beginner and Meister.We found a tendency that fluctuation of pressing force by Meister to be smaller than it by beginner.
