#Process #cost #reduction in #Automobile #industry part 4 | Tap Selection in Automobile industries

#Process #cost #reduction in #Automobile #industry part 4 | Tap Selection in Automobile industries


Hi friends! good morning namskaar sat shri akaal Adaab
Mr. Davinder Sharma tooling expert is available with us for tech discussion
he having good knowledge and experience of automobile industries
we have different topic today as
we have already published one video with Mr.Shrama
regarding process cost reduction in factory
So we have to discuss Tapping operation today
as we know tapping operation is used to make threaded hole to screwed with other part
so Mr. Sharma is going to share the methodology to select the tap for component
yes Mr.Shrama
Namaskaar to everyone
we have discussion today regarding Tap selection
most of parts we manufacturing with threaded hole
but tapping operation is ignored or misunderstood during selection
generally it is checked what is the pitch of tap , hole size for tapping and chamffer on hole
but there is so many implicates to consider during selection
we can classify the taps in this way
if it has to done on the basis of component we want to manufacture
it is impotent to check first what is the material of the component
we can determine the types of chips which is important in selection of tap
and chips evacuation is also critical matter of concern
ok, Sharma it is depend on material of part to selection
2nd criteria is type of hole
pre-hole is a blind hole or through hole
it is also impotent parameter to take in consideration during tap selection
if i talk about the material
as cast iron, there is sort chips generation
in this case we recommend straight flute Tap
this tap can’t do chips evacuation,
so small chips will accommodate
in both types of hole that is blind or through
now it is turn of steel to discuss
if the hole is through
then we have option of straight flute tap
another option is spiral point Tap
flute has straight in this Tap
but the chamffer have light flute or we also said spiral point
we normally recommend this Tap for Through hole
this push chips to downward direction during operation instead of upward
in blind hole, this type is not feasible
to use because in steel chips generation is curly and long
if you load spiral point tap, chips will jam and there may be chance of breakage
so it is recommended spiral Tap
spiral tap allow the chips to move upward
these are important point to consider during selection
now it is also important material of Tap
if i broadly classify Tap
HSS material Tap starts with M2 Grade material
this is beginning grade of HSS Material
M35 is generally used in industry to manufacturing Tap
there is 5% cobalt in M35 Grade
so cobalt promote the life and consistency and also operate at better parameter of Tap
wear out rate is also better
Tap will give better life in terms of meters
please tell but is the optimum life of tap in terms of meters
in cast iron it may be 100meters
cast iron is highly machinable material
in steal , it is depend what is hardness
if normal or soft steel life varies between 40 to 50 meters
maximum is only 40 or 50 meters
this for hardened material or soft
No this for soft grade
it decrease in harden grade material to 15 meters only
this is general numbers or by experience calculated
so for hardened grade you may recommend another tap with better grade
it may costly but cost per component cheaper
after M35 there is better grade is M42
in this cobalt % is increased to 8% to 10%
you can get better life on that Tap
beyond these grade , powdered metallurgical grades are available
these also give better performace and life

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