Project ForgeManufacturing Engineering
Machining Processes
GATE 2017
Easy
Which one of the following statements is TRUE for the ultrasonic machining (USM) process?
- AIn USM, the tool vibrates at subsonic frequency.
- BUSM does not employ magnetostrictive transducer.
- CUSM is an excellent process for machining ductile materials.
- USM often uses a slurry comprising abrasive-particles and water.
Explanation
USM works by feeding an abrasive slurry (typically abrasive particles suspended in water) between the vibrating tool and workpiece, so material is removed by particle impact/erosion. The tool vibrates at ultrasonic (not subsonic) frequency, typically driven by a magnetostrictive transducer, and USM is best suited to hard, brittle (not ductile) materials — making D the only true statement.
Source: GATE ME 2017 Session 2 (ME-2) (2017)
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