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Manufacturing Methods. Technology II – Jan Tomíček. Machining operations. Machined parts Rotational – cylindrical ( shafts ) or disk- like Nonrotational ( Prismatic ) – block - like or plate- like Elementary shapes Rotational , planes , contoured . Examples. Machining operations:.

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manufacturing methods

ManufacturingMethods

Technology II – Jan Tomíček

machining operations
Machiningoperations
  • Machinedparts
    • Rotational – cylindrical (shafts) or disk-like
    • Nonrotational(Prismatic) – block-likeor plate-like
  • Elementaryshapes
    • Rotational,
    • planes,
    • contoured.
machining operations1
Machining operations:

creating a shape

  • generating–by the feed trajectory of the tool
  • forming–by the geometry of the tool
  • combination– of both processes
classification of manufacturing methods
Classificationofmanufacturingmethods
  • Materialremovalprocesses
a cutting tool
A CUTTING TOOL
  • single-point tool (a)
  • multiple cutting edge tool (b)
cutting edge
CUTTING EDGE
  • face - rake angle RA α
  • flank - relief angle ERAγ
broaching
BROACHING
  • a multiple tooth cutting tool
  • the forming tool moves linearly relative to the workpiece in the direction of the tool axis
  • Movementthroughoralongthe part
broaching process
Broaching process
  • on apress – the tool is pushed
  • on a broaching machine – the tool is pulled
  • Usingspecialmachine– stationarybroach
broaching machines
Broaching machines
  • vertical►
  • horizontal▼
broached shapes
Broachedshapes
  • Internal – holesandotherroundshapes, keyways, profiles, gears
    • Needleading hole to placethe pilot
  • External – faces, T-shape, co-planarsurfaces, gears
  • Holescalibration – Broachdiameterslightlybiggerthanthe hole.
rotary broaching limitations
Rotarybroaching - limitations

Broachlength

Spiraling

broaching limitions
Broachinglimitions
  • Machined volume
    • Limited by chipthicknesslongbroach
  • Speed
    • No weardemands lowtemperature, forces
  • Toolcosts
    • Expensiveproductionlongtoollife