Application of a magnetoelastic rate of change of torque sensor to monitor the condition of milling cutters and operating parameters is described. Cutting tools naturally degrade with use by wear, chipping, or fracture, and the efficiency and quality of the product are highly dependent on the tool condition. The theoretical analysis is compared to experimental data in detecting changes in torque during each cutting event, and the rate of change of torque signal is investigated for a variety of cutting tool conditions.
The effects of varying shot peening process parameters on drag force signatures are examined. The salient features of such signatures are found to compare favorably with those expected from consideration of the effects of peening on magnetic properties combined with analysis of the actual force sources. The potential utility of the drag force method for automatic assessment of peening quality and uniformity is encouraged by experimental results.
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