86075914 53 Jigs and Fixtures

8/18/2019 86075914 53 Jigs and Fixtures

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Jigs and Fixtures presented by:- Abhilekh Agrawal(31)


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Anything used tohold a workpiece ina desired location

Locate parts forprecisionRepeating processon a series of partsHolding parts for

machining, painting,assembly


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Parts should be designed toaccommodate standard xturingcomponentsDesigns should accommodate fast andrepeatable xturing


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oth !igs and xtures positioncomponents accurately" and holdcomponents rigid and pre#entmo#ement during working in order toimpart greater producti#ity and partaccuracy$


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%igs and xtures hold or grip a workpiece in the predetermined manner of

rmness and location, to perform onthe work piece a manufacturingoperation$


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Jig: A device that holdsthe work and locatesthe path of the tool.

Fixture: A device fixedto the worktable of amachine and locatesthe work in an exact

position relative to thecutting tool.

&uperior %ig

'lexible 'ixturing &ystems


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(ssential factors)**&tudy of the component

&tudy of the locating elements

&tudy of the clamping arrangement


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&tudy of the safety de#ices

&tudy of the power de#ices foroperating the clamping arrangement

&tudy of the tool guiding and cuttersetting elements


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JigsDrill jigs

Drill bushings


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For machining purposesLocates the component,holds it firmly in place,

and guides the cuttingtool.For assembly purposes

Locates separate

component parts andholds them rigidly in theircorrect positions whilethey are being connected.

+orthwestern,ools


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-lamps-hucks.ises

ushings/odular 'ixtures


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pen jig !also called plate jig or drilltemplate"

The simplest type of drill jig

Consists of a plate with holes to guide thedrills, and may have locating pins thatlocate the wor piece on the jig


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Drill bushings!recision tools that

guide cutting toolssuch as drill andreamers intoprecise locations in

a wor piece.

Accurate ushing -


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"rill Jig ComponentsJig body

Cap screws and dowel pins

Locating devices and clamping devices

Loc ing pins

"rill jig design


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+orthwestern ools


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Jig body #olds the various parts of a jig assembly.

#ap screws and dowel pins#old fabricated parts together


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$ocating devices!ins, pads, and recesses used to locatethe wor piece on the jig.


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#lamping devices


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$ocking pins$nserted after thefirst hole is drilled toloc or hold thewor piece securelyto the jig plate whilesubse%uent holesare being drilled.


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%illing fixtures

Fixture components

Fixture designconsiderations

&e'uence in laying out afixture


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&et blocksCutter set bloc s are mounted on thefixture to properly position the milling cutter

in relation to the wor piece.


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Fixture baseFixture components and the wor piece areusually located on a base, which issecurely fastened to the milling machinetable.

&tandard Parts -o$


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#lampsClamps counteract forces from the feed ofthe table and rotation of the cutter.

American Drill ushing -o$


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THANK YOU

Documents

86075914 53 Jigs and Fixtures