Rotary Ultrasonic Machining(RUM)

OR

Micro-Ultrasonic Machining(MUSM)

BY:- Ankush KaliaNIFFT, Ranchi

What I am covering :-What is micromachining ?What is RUM ?Why it is needed ? Process principle and workingEquipmentsTypes of RUMProcess parametersApplications

MicromachiningMicromachining is a basic technology of

fabrication of micro-components or features of size in the range of 1 to 999 micrometers.

RUM and its requirementIt is variation of USM in which a tool of

micrometer diameter is rotated at a high speed in addition to conventional USM process.

Using RUM micromachining up to 100 micrometers is possible , which is not possible in conventional USM. In addition to this there are many other advantages of this process over USM and other Non- conventional machining processes which will be discussed further in this presentation.

Process principle and workingRUM is a mechanical material removal

process used to machine hard or brittle materials by ultrasonic impacts (hammering, extraction, abrasion) and grinding action of the diamond abrasives impregnated on the tool

AC Powe

r Supp

ly

High Freque

ncy electri

cal signals

Transducer

Tool Connector

ToolVibratin

g abrasiv

es

Work-piece

Hammering

action erodes W/P

Finished component

EQIPMENTS

TWO TYPES OF MACHINING PROCEDURESVibrating ToolVibrating work-piece

TOOL & TOOL TYPES

TYPES -Hollow tool with slotsHollow tool without slots

Multi-tools

PROCESS PARAMETERSIn case of vibrating the toolIn case of vibrating the W/PThree case:-

1. Tool with slots, without vibrations2. Tool with slots, with vibrations3. Tool without slots, with vibrations

Vibrating the Tool

Vibrating the w/p

Comparing three different case:

APPLICATIONSMachining of Titanium alloys- Jet engines,

AirframesMachining of silicon carbide components

used in high temperature engines, nuclear fusion reactors, aerospace components

Machining dental ceramicsMachining of glass, quartz, rubies

REFRENCESSarwade, Aarati, "Study of Micro Rotary Ultrasonic

Machining" (2010). Industrial and Management Systems Engineering -- Dissertationsand Student Research. Paper 6.

ROTARY ULTRASONIC MACHINING OF HARD-TO-MACHINE MATERIALS by NIKHIL CHURI B. S., University of Mumbai, India, 2002

MICROULTRASONIC MACHINING USING MULTITOOLS

RUM

HIGH RESOLUTION MICRO ULTRASONIC MACHINING (HR-μUSM) FOR POST-FABRICATION TRIMMING OF FUSED SILICA 3-D MICROSTRUCTURES Anupam Viswanath, Tao Li, and Yogesh B. Gianchandani Center for Wireless Integrated MicroSensing and Systems (WIMS2) University of Michigan, Ann Arbor, USA

EXPERIMENTAL STUDY OF MICRO ULTRASONIC MACHINING PROCESS Sreenidhi Cherku, Murali M Sundaram, and K P Rajurkar Center for Nontraditional Manufacturing Research University of Nebraska-Lincoln Lincoln, Nebraska, USA