Advanced Machining : Practice Questions and Answers

Indentation and cavitation can be done using micro ECM by moving the work piece or switching the pulse current.

Micro ECM is used to machine micro parts which can be from micro scale to mesoscale in size.

Electrolyte jet in micro ECM acts as the micro tool for machining.

ECM is usually characterized as low accuracy machining because of its wider machining gap.

Using deburring process through ECM, sharp edges are dulled, which are produced after rough cuts.

ECM can be used for machining high strength alloys and hardened steels which led to many cost-saving applications.

ECM can be used for die sinking, trepanning, drilling, contouring, grinding and profiling.

ECM has its applications in industries such as gas turbines, jet engines, automobiles, medical etc.

Before machining, air has to be filtered to remove dust, moisture and oil in the machining system.

Silica dust, that occurs after machining can be a health hazard in AJM.

Soft materials such as candy bars, thin softwood etc.., cannot be machined using AJM.

In Abrasive jet machining, hardening is not experienced by the machined materials.

In Abrasive jet machining, tool changes are not required.

In Abrasive jet machining, material utilization is very high since it removes material by using abrasives.

In Abrasive jet machining, the above mentioned materials can be machined, which are heat sensitive and brittle.

Abrasive jet machining can be used for micro deburring of hypodermic needles.

Abrasive jet machining is used to machine, intricate shapes and holes in brittle, thin and difficult to machine materials.

Without affecting the conductor, both stripping and cleaning are done, by using Abrasive jet machining.

Abrasive jet machining can be used for cutting, drilling, deburring and cleaning processes.

Thin recast layer is produced in Electron beam machining which an added disadvantage to the machining process.