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Manufacturing Methods

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

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  1. ManufacturingMethods Technology II – Jan Tomíček

  2. Machiningoperations • Machinedparts • Rotational – cylindrical (shafts) or disk-like • Nonrotational(Prismatic) – block-likeor plate-like • Elementaryshapes • Rotational, • planes, • contoured.

  3. Examples

  4. Machining operations: creating a shape • generating–by the feed trajectory of the tool • forming–by the geometry of the tool • combination– of both processes

  5. Machining – generating

  6. Machining – forming

  7. Machining – combination of forming and generating

  8. Classificationofmanufacturingmethods • Materialremovalprocesses

  9. A CUTTING TOOL • single-point tool (a) • multiple cutting edge tool (b)

  10. CUTTING EDGE • face - rake angle RA α • flank - relief angle ERAγ

  11. ManufacturingMethods BROACHING

  12. BROACHING • a multiple tooth cutting tool • the forming tool moves linearly relative to the workpiece in the direction of the tool axis • Movementthroughoralongthe part

  13. Broaching tool

  14. Externalbroachingtool

  15. Broaching process • on apress – the tool is pushed • on a broaching machine – the tool is pulled • Usingspecialmachine– stationarybroach

  16. Broaching machines • vertical► • horizontal▼

  17. Broachedshapes • Internal – holesandotherroundshapes, keyways, profiles, gears • Needleading hole to placethe pilot • External – faces, T-shape, co-planarsurfaces, gears • Holescalibration – Broachdiameterslightlybiggerthanthe hole.

  18. Keywaybroaches

  19. Rotarybroaching • internal

  20. Rotarybroaching - limitations Broachlength Spiraling

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

  22. Broaching – tolerances and surface finish

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