Investigation of cutting conditions when drilling is fundamental to the teaching of cutting techniques. The set-up comprises a transducer, which also holds the specimen being machined, and an amplifier unit with digital displays. The axial force (feed force) and torque occurring during cutting are measured using strain gauge transducers and digitally displayed on the amplifier unit. The experiments must be conducted in a workshop environment, as a suitable drilling machine is required. The clearly structured instructional material sets out the technological fundamentals and provides a step-by-step guide through the experiments.
Learning Objectives / Experiments
- Measuring feed force and torque at the cutting surface + influence of rotational speed, rate of feed, lubrication and cooling conditions - Influence of the cutting geometry of the drill - Influence of the material being machined
* Cutting conditions when drilling1 * Measurement of feed force and torque
 Drilling measurement device  Measurement of feed force and torque  Strain gauge type measuring transducer  Strain gauge amplifier with digital displays for axial force and torque  Splash-proof stainless steel housing for transducer
Drilling diameter: max. 16mm Specimens: - square l x w: 25x10...25x20mm - possible materials: steel, brass, aluminium,