Design and manufacture of a force gauge for measuring and analyzing cutting forces on a lathe


Thesis Type: Postgraduate

Institution Of The Thesis: Bursa Uludağ University, Fen Bilimleri Enstitüsü, Fen Bilimleri Enstitüsü, Turkey

Approval Date: 1995

Thesis Language: Turkish

Student: Yahya IŞIK

Supervisor: Mustafa Cemal Çakır

Abstract:

In this study, the design and the production of a dynamometer which will be used to measure and to analyse the cutting force in the lathe, is investigated. The force components in the cutting, radial and feed directions were found to be highly sensitive to variables such as feedrate, material hardness, tool coating and tool wear, depth of cut and tool life. The dynamometer design was developed from suggestions published by the Massachusetts Institute of Technology. The existance of strain nodes at certain sections of a loaded circular ring make it possible to separate strain measurements owing to vertical and horizantal loading with strain-gauge dynamometers. For this measurement strain gauges mounted on these struts are connected. The dynamometer was produced from a single block of material of St-37 and LY-6/1 20 type of strain gauges have been used for meausuring the straines. Before experiments were made it has been calibrated and each component reading was sensitive to the loads applied in the other component direction. Thus, interaction is present in both components and have been compensated by the use of calibrations. Experiments were made on the material of St-60 and comparisons were made between the values obtained from the experiments and the values calculated theoritically