Abstract
A tool dynamometer, which consists of a pair of parallel springs attached to the cutting tool or work and a pneumatic micrometer, is described here. The minute displacement of the former proportional to the cutting force is detected by the latter.
In this paper the following items are involved:
1) Static and dynamic characteristics and measuring force (force due to air jet from the nozzle) of pneumatic micrometer (water column type).
2) Static and dynamic characteristics of parallel springs.
3) Some practical applications: dynamometer for shaping, turning, milling, cutting-off, scratch tests or lapping force, etc., with photograrns.
This dynamometer is not only able to measure the mean cutting force simply and accurately in machine shops, but also to record the instant changes of force in laboratory.
