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Tools/metallathe/induction: Difference between revisions
→Level 3 A: flesh out the first topic a bit, still far from everything
imported>Stever m (categorise) |
imported>Stever (→Level 3 A: flesh out the first topic a bit, still far from everything) |
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(All stuff we can do right now)
* Internal and external
** Theory of thread-cutting
*** Thread forms and how they change with size
**** Which bits are critical and which aren't
**** Extra reliefs needed for worm gears to mesh nicely
*** Helix angles and how numbers starts alters this
*** Relief angles needed
*** Problems of setting suitable speeds
*** What wrong speed or insufficient rigidity looks like
** What tools are available
*** Semi-profile, full profile, and why neither will work well for multi-start
*** The option of grinding your own
** Setup for thread cutting
*** Creating gullies
**** Creating external gullies using parting tool if you have to but effects of stress risers
**** Using the thread tool to make internal gullies
**** What to do if there's not room for a gully
***** You probably shouldn't be thread-turning, look at specialist taps/dies
***** Using reverse-side thread-cutting
***** But if you REALLY have to.... using back-out strategies and the foot brake
*** Reading the tables to set gear suitably
***** Using the change-gears for really coarse threads
*** Setting up the threading dial for metric threads
**** Why it won't work on imperial threads
*** Tool mounting and angle
*** Choice of top-slide angle and setting feed angle on the top-slide
*** Picking speeds that will work
*** Using threading dial or using back-and-forth patterns
*** Choosing infeed amount and using trig to calculate theoretical depth
*** Using wire thread gauges to check depth
*** Test fitting if possible
*** Deburring when done
* Blind turning on the indicator dials
* Grooving Internal and External
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* Cutting standard module worm gears
* Pressure-plate turning of plastics
=== Level 3 B ===
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