Hello everyone, I am Professor REYNER, today we are going to have a video class, thank you for joining us.
Our main objective will be to teach how to select the different
steps to make or make rocks on the lathe, one of the most
laborious jobs imagined in making red To elaborate the
thread, the recommended thing more than everything is an operator is to know the machine and the
tables that it brings, it is also worth mentioning that here I am not going to
teach the thread elements how to do the calculations because this would already be
another class here the main objective is to teach how to select a specific
step but the denomination the angle banks the characteristics of the
threads that would be another good then to be able to select the
steps in a conventional lathe parallel environment we must take into account
that it brings some tables of threads and advance then we need to
handle well that these tables and we must also know how to enter a
lever of se lesson of those rock steps then so that that link in its
main environment with the advance box on the threading axis we must
also take a train of wheels that is we are going to see at this moment
the machines bring what we are going to know wheel trains there are some that have
unique wheels but most machines
nowadays bring interchangeable wheel sets to be able to achieve
different steps of red if we want to know more about this you can leave a
comment or ask the question for what the 30 wheels do you have to see other wheels
so that the objective how to do the calculation from the environment because these
wheels are interchangeable and can be changed then that means that
there are machines that have interchangeable wheels and there are others that are
not
a joke lucid main of the lathe asia is here where the elliot
will be assembled this is where the piece is assembled this man the train of wheels serves
to link the gearbox with the where The piece is going to be assembled and thus
achieve red,
we also go and how we achieve different glasses by having different levers in different
positions and placing the gears about the camera that can be
seen there, in the case of this gear, we can see there
according to how well stipulated from the factory 710 teeth the others we cannot
sharpen like this one that you can see this one here is 70 teeth
and this one cannot be seen let's see more here that stands out from the
camera please there from 72 10 then tell the camera that Look at
these two, then these two kidneys or wheels at this moment are not
doing anything, the ones that are working are this, this sprocket mentioned a
small attack, this big one, and this other one that is here this 72 and this 70 at this
moment they are not doing nothing ok now we have already seen the element that joins the
rock box with the spindle in this case it is the train of wheels
now we are going to see according to that train of wheels according to the number of
teeth it has each one is of their opinion and related to each other now
we are going to see how to achieve those steps
if we approach here this table here will look good only the table this table is
in millimeters thread pitch in millimeters so that we can achieve those
thread steps We have to be clear about this, this scheme that is here,
this kinematic chain says that it is still in the upper part on the primary shaft there
must be a 36-tooth sprocket then linked with a 110-tooth one
and below a 111-tooth one so that we can work all this table that
is here having us this wheel train
we are going to have to move these levers the lever and the abc
lever and to achieve those steps and relate to these numbers that
are here later we are going to explain other situations and the Levers an example
if I wanted a pass in millimeters to put an example of 2.25 we look in
table 2.25 and when we identify it we relate it to the row ps and the
number 212 to achieve that step I have to put the lever in position of the position
lever c and the number 2 now well what are those levers
this lever at the top we will not take them into account because this is the
gearbox which we are going to see is generally In this one that
is in the lower part so that we can achieve thread steps we are going to
relate the positions that is, in the locations of these five levers,
first we have this one that this one up here will be the 6 the second that this one
is here will be Jaime's This one here in the metric system of
the English system is to select the knife whether to
decide to work and this one here is the one that selects the row that goes from 1
to
example we had since we are going to look for a step of 2.25 for the 2.25
lesbian We should have the letter b so if we have it there we are not going
to achieve it this lever must be in the letter b and this other one here must be in
the position then I must put it in this, people of this way in
the upper part if I do not have here the d should be selected and the
step will be a correct it must be in c now we come here
and this lever must be in the metric system metric system English system
this plate here
should be this here it indicates countersigned displacement and it is here it indicates
thread so if I have it in this position it is threaded if I have it
pardon the displacement and s'illot in this position is threaded and we do not come we
come now to this selector which to achieve the step to us
located at number 2 then let him remove this insurance and he does it from thread
we withdraw the convenience until reaching the number which is in this case the
arrow that indicates that it should be at number 2 when we achieve that we
anchor it and we have the step As we can see, a turner must know
that when he is scratching he must be turning the threaded bushido if
we put the cylinder if we come and select the cylinder,
the decile will be working and enter So there we cannot achieve
thread steps it has to be to change position in this here now we come
here to understand another situation
there we have already selected
the rock step the correct positions in the advance box now it comes in the
activation lever of the spindle overthrow or it is already on the
tournament is already working the spindle or the spindle thread with the levers
in the correct positions the correct speed that you also have to
calculate and it is known that these are low speeds according to experience or the
skill of the turner and when we are going to throw this is the symbol that
we are going to see all around the symbol of a split nut that indicates thread
so when we have it upwards kutz the nut the symbol indicates that it
is open it is separated when it we make downwards the nut
has been tied in graná with this threaded spindle and when meshing it will take the
entire console of the lathe apron with it
then How can we see if I come and anchor this lever right now, this is
going to begin to make an advance and as we can see there the automatic thread
is already advancing and there we have to come to use
all the threading technique that is turned on against gear and all
the applied techniques because they must handle it
there, we unpin it, we lose the step there, we have already explained how to select
the positions of the lever according to the thread table in millimeters. It is the same
procedure for when a thread is already going to be performed in inches but
we are going to explain another example
to achieve less other steps in millimeters we must have these pinions
in 39 but if we now come to 1 of an inch
to 1 of an inch that will be different, for example this one that is here in this table
please come to The table here that looks good there, there this table
looks good in inches so that means that for us to achieve
these steps well I repeat in which I am not going to have to explain how the number of opportunities
left as that that would be another class here we are going to apply only the
selection of the table so let's see so that we can achieve this that this step
must be in the primary pinion
so that we can achieve step of this table A 110 tooth wheel meshing with a
70 and at the end it must be
70 and on that same axis once 72 meshes with a 111, look well and you have
to know how to read the diagram of this 110 kinematic chain in red with the 70 one
but on the same axis a 72 is mounted, the 72 in red with the 102 so
is the kinematic chain so that later it comes we will achieve the steps that
we have here that indicate us here for example the 14 thread per inch If
we want to achieve 14 and 2 per inch, we must select the number 18 8 in the selector
and here the letters that should be getting in the letter b and the letter c
that is the way in which the steps for threads in
millimeters or in inch on this model of torn or korean in this case this is
a brand and johnson johnson is the brand of these korean lathe well without anything
else to say any doubt and that your way please in the video
to help answer all those tournaments that are starting to learn
that grant thread tables in the next video we are going to make
harrison lathes