86075914 53 jigs and fixtures
TRANSCRIPT
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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