skill development for successful cad-cam technology

8/8/2019 Skill Development for Successful Cad-cam Technology

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SKILL DEVELOPMENT FOR

SUCCESSFUL CAD-CAMTECHNOLOGY

AUTHOR: Mr. SRIKANTA MOHARANAAUTHOR: Mr. SRIKANTA MOHARANA

PRESENTER: Mr. SANKET KUMAR ROUTPRESENTER: Mr. SANKET KUMAR ROUT

MISS PRIYANKA BEHERAMISS PRIYANKA BEHERA

MISS GAYATRI SWAINMISS GAYATRI SWAIN

Swami Vivekananda National Institute Of Swami Vivekananda National Institute Of

Rehabilitation Training And Research.Rehabilitation Training And Research.



INTRODUCTIONINTRODUCTION ± ± PHASEPHASE--II

Human is the only creature of this nature, whoHuman is the only creature of this nature, whois very finely & intelligently tuned.is very finely & intelligently tuned.

CADCAD-- CAM technology imparting very perfectCAM technology imparting very perfect& elegant services to the production industries& elegant services to the production industrieswhere mass production is mostly concerned.where mass production is mostly concerned.

For the cause of prosthetic & orthotic, itFor the cause of prosthetic & orthotic, it

requires a very soft sense of perception (SSP)requires a very soft sense of perception (SSP)to manipulate the data within the perspectivesto manipulate the data within the perspectivesof comfort, function & acceptability.of comfort, function & acceptability.



PREPRE--SKILL DEVELOPMENTSKILL DEVELOPMENT

BEFORE TO CADBEFORE TO CAD--CAMCAMCADCAD--CAM is a mechanical digitizedCAM is a mechanical digitized

process. It does not prospects anyprocess. It does not prospects any

sensible elegance reference to CFC.sensible elegance reference to CFC.Patient always needs special attentionPatient always needs special attention

in respect of CFC.in respect of CFC.

The PreThe Pre--skill development with regardsskill development with regardsto biological parameter is mostlyto biological parameter is mostly

necessary.necessary.



GEOMETRIC MODELINGGEOMETRIC MODELING

Geometric modeling is one of the powerfulGeometric modeling is one of the powerful

tooling system through which a successfultooling system through which a successful

prosthetist can study :prosthetist can study :--Behaviour of the stump.Behaviour of the stump.

Character of the surface.Character of the surface.

Reference of 2DReference of 2D

& 3D Modeling.& 3D Modeling.

IDEAS

SOCKETINTERFACE

DESIGN ANALYSIS

GEOMETRIC

MODELING



IDEASIDEAS

Ideas of pathological parameter Ideas of pathological parameter

like oedema, neuroma, phantomlike oedema, neuroma, phantom

sensation, bone spur, skin break sensation, bone spur, skin break down, bursitis, adherent skin,down, bursitis, adherent skin,

hypertrophied scar, keloid arehypertrophied scar, keloid are

more precisely consideredmore precisely considered..



DESIGN ANALYSISDESIGN ANALYSIS

Evaluation of areas and volumes.Evaluation of areas and volumes.

Evaluation of mass and inertia proportion of Evaluation of mass and inertia proportion of stumpstump

Interference checking of range of motion,Interference checking of range of motion,valgus / varus angle.valgus / varus angle.

Analysis of tolerance built up over bonyAnalysis of tolerance built up over bony

projected areas. projected areas.Kinematic analysis.Kinematic analysis.

Standard finite element analysis.Standard finite element analysis.



SOCKET INTERFACESOCKET INTERFACE

BEHAVIOUR BEHAVIOUR Socket interface behaviour can be categorizedSocket interface behaviour can be categorized

through:through:--

Perspective viewsPerspective viewsOrthographic viewsOrthographic views

Isometric viewsIsometric views

Axonometric viewsAxonometric viewsSectioningSectioning



Welcome to phaseWelcome to phaseIIII



DIGITAL DIFFERENTIALDIGITAL DIFFERENTIAL

ANALYSIS (DDA)ANALYSIS (DDA)Most versatile element of CADMost versatile element of CAD--CAM systemCAM systemis the component of software related tois the component of software related tomanipulation of geometric element.manipulation of geometric element.

Raster Scan Graphics:Raster Scan Graphics:-- Converting vector Converting vector straight lines to raster images to be displayedstraight lines to raster images to be displayedon a raster terminal utilizing the pixelon a raster terminal utilizing the pixel

information.information.DDA is one of the first algorithms developedDDA is one of the first algorithms developedfor for rasteringrastering in thein the vectorialvectorial informationinformation



SCHEMATICSCHEMATIC

REPRESENTATION OF CADREPRESENTATION OF CAD--

CAMCAM--P&O PROCESSP&O PROCESS

OPTICAL BASED

DIGITIZATION

MECHANICAL CAST

DIGITIZATION

ELECTROMAGNETIC

FIELD BASED

DIGITIZATION

SCANNING SYSTEM DATA COLLECTION

STORE

DATA

MANIPULATION

STAGE

DATA PROCESSING

& MANUFACTURING



PLANNING OF THEPLANNING OF THE

DRAWING (PFD)DRAWING (PFD)The planning directly relates to:The planning directly relates to:--

1.1. Reduction of shearing force.Reduction of shearing force.

2.2. Force execution quality.Force execution quality.

3.3. TolerabilityTolerability of the surfaceof the surface

WhileWhile planning planning for for aa successfulsuccessful modificationmodification of of thethe

Stump,Stump, youyou mustmust carefullycarefully organizeorganize thethe informationinformation likelike::--

1.1. UnitsUnits

2.2. Coordinate systemCoordinate system

3.3. LimitsLimits4.4. GridGrid

5.5. SnapSnap

6.6. OrthoOrtho



EMPHASISEMPHASIS

After the successful collection of data & required drawingAfter the successful collection of data & required drawingwe can enter to the field of manufacturing throughwe can enter to the field of manufacturing throughnumerical controlled computing system.numerical controlled computing system.

And during this stage P & O engineer must emphasizedAnd during this stage P & O engineer must emphasizedon :on :--

1.1. Principle of numerical control.Principle of numerical control.

2.2. Exploration various modes of operation of numericalExploration various modes of operation of numericalcontrol.control.

3.3. Elements those are required for successful operationElements those are required for successful operationof numerical control.of numerical control.

4.4. Friendly with NC machine.Friendly with NC machine.



COMPUTER AIDED PROCESSCOMPUTER AIDED PROCESS

PLANNINGPLANNINGTraditionally process planning is performedTraditionally process planning is performed

manually by highly experienced P & Omanually by highly experienced P & O planners, who process in depth knowledge of planners, who process in depth knowledge of

the modification.the modification.Moreover this in depth knowledge can beMoreover this in depth knowledge can be

intensively used through computer aidedintensively used through computer aided

process planning (APP) through: process planning (APP) through:--1.1. Variant approachVariant approach

2.2. Generative approachGenerative approach



DATA EXCHANGEDATA EXCHANGE

This brilliant system operation can not beThis brilliant system operation can not be

functional without a successfulfunctional without a successful

communication system.communication system.

In fact the communication system can beIn fact the communication system can be

implemented through Parallel transmission oimplemented through Parallel transmission o

Serial transmission mode.Serial transmission mode.

Transmit Data Receive DataTransmit Data Receive Data

Request To Send Clear To SendRequest To Send Clear To Send

Data Terminal Ready Data Set ReadyData Terminal Ready Data Set Ready



BIOMECHANICALBIOMECHANICAL--MANIPULATIONMANIPULATION

Therefore a quality CADTherefore a quality CAD ± ± socket is onlysocket is only

possible when the P & O engineer must have possible when the P & O engineer must have

manipulate himself within the frame work of manipulate himself within the frame work of

biomechanics, tissue mechanics, successive biomechanics, tissue mechanics, successive

finite element analysis and substantial loadingfinite element analysis and substantial loading

or metrical area.or metrical area.

Thus more understanding of mechanics refersThus more understanding of mechanics refers

to more comfortability & uniform loadingto more comfortability & uniform loading

process. process.



SUCCESSFULSUCCESSFUL -- CADCAD -- SOCKETSOCKET

Better biomechanical understanding withBetter biomechanical understanding with

tolerable manipulation on the frame worktolerable manipulation on the frame work

of necessary data exchange can onlyof necessary data exchange can only

results a better & successful socketresults a better & successful socket

interface.interface.

BiomechanicBiomechanic Data Algorithm CASDData Algorithm CASD

skill development for successful cad-cam technology

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