work and tool holding devices
TRANSCRIPT
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MANUFACTURING TECHNOLOGY
UNIT – V
Machine Tools
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Manufacturing Technology
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Manufacturing Technology Work Holding Devices Drill Press Vise
Used to hold round, square or odd-shaped rectangular pieces Clamp vise to table for stability
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Manufacturing Technology Angle vise
Angular adjustment on base to allow operator to drill holes at an angle without tilting table
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Manufacturing Technology V-blocks
Made of cast iron or hardened steel Used in pairs to support round work for drilling
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Manufacturing Technology Step blocks
Used to provide support for outer end of strap clamps
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Manufacturing Technology Angle plate
L-shaped piece of cast iron or hardened steel machined to accurate 90º may be bolted or clamped to table
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Manufacturing Technology Drill jigs
Used in production for drilling holes in large number of identical parts Eliminate need for laying out a hole location
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Manufacturing Technology Clamps or straps
Used to fasten work to table or angle plate for drilling Usually supported at end by step block and bolted to table by T-bolt
that fits into table T-slot
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Manufacturing TechnologyTool-Holding Devices Drill Chucks Most common devices used for holding straight-shank cutting tools Most contain three jaws that move simultaneously when outer sleeve turned
Hold straight shank of cutting tool securely Two common types
Key Keyless
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Manufacturing Technology Key-type
Most common Three jaws move simultaneously when outer sleeve turned
Tighten with key Different size keys for different size chucks
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Manufacturing Technology Keyless
Chuck loosened or tightened by hand without key Precision keyless
Holds smaller drills accurately
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Manufacturing Technology Drill Sleeves
Used to adapt drill shank to machine spindle if taper on tool is smaller than taper in spindle
Drill Socket Used when hole in spindle of drill press too small for taper shank of drill Used often as extension sockets
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Manufacturing TechnologyDrill Drift Used to remove tapered-shank drills or accessories from drill press spindle Always place rounded edge up so this edge will bear against round slot in
spindle Use hammer to tap drill drift and loosen tapered drill shank Use board or piece of pressed-wood to protect table or vise
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