infeed screw, profile creation, help

[heterodyne]

Hello everyone,

I wanted to know if someone is able to help us in the creation (of course it is a paid assistance) of a profile as in the figure indicated below.

we correctly digitized the shape of the screw (stl) but we realized that it is not only about extracting the correct 'pitch' of the propeller and the relative section. is behind a certain 'grammar' that knows only those who work in this specific sector.

allego that until now we have managed to get without big problems

timing screw - stl scanning

cad redesign of the corpo

if someone who has experience in this field and can recreate the correct pitch and the section to use for cutting can send a pvt message indicating also the cost of performance. we are in uk so I assume you have to make an invoice and/or occasional note. . on this point then you see how to do it.

it would be useful for us to receive a solidworks file but, desperately a parasolid, step.
I can pass the stl file to use as reference and body in step.

in pv indicated me possibly a number of tel. to speak better

thanks in advance

 

[+forte]

la grammatica:

 

[heterodyne]

Hello, thank you. You were very kind.
the scheme and rather clear even if I have a series of doubts that at the moment remain.
Would you care to create and provide us with the 3d file?

thanks in advance

 

[welcome to the machine]

Do you have to work only cylindrical bodies or do you also care to treat objects with different sections? I remind you that the "grammar " you refer to can not include the acceleration with which the object is brought to the desired step and the length of the portion at constant pace. the 3d is not difficult to obtain it also with cad not particularly evolved, but you have to know how to prepare the calculation file with which, through the iteration of a boolean subtraction, move the cylindrical lace - net of the conicity of ambush - and the tool, that is the object from "muovere". I move between quotes because you will surely know that these screws do not push but hold the object in transit. However, a fundamental aspect to make it work well is the definition of the nucleus diameter according to the other parameters: There are no uniquely determined solutions, but many different possibilities and choosing the correct profile requires good experience. If I show you the catast of what I threw you laugh... .
p.s. m step out and h step out...as well?