camma a tamburo

[Gzda]

good day to all is the promo message I write on the forum and I do not want to do something wrong, since I am not very practical of social, so I apologize in advance
work in a mechanical workshop for more than 20 years and the beauty of this work is that you never stop learning.
I did a lot of research and I couldn't find an answer to the problem I have.
As an object I have to realize a drum cam that rotates a plate with six rollers, I have already realized the path I wrapped it on the cylinder and cut with swep.

This video shows what I have to do.
I wondered if, having already the path developed with camliks I can simulate the rotation of the plate with relative removal of the material, to generate so a correct surface.

thanks in advance

 

[welcome to the machine]

It is an argument already treated by far more authoritative colleagues, but instead of you I would not do the removal by iterating the subtraction of the roller (in fact of the rollers, because you will have more than one engaged in the cam) because you should turn the axis of the cam continuously and the bat according to the law of motion of the intermitter and already is not easy, but the surface of the two sides where the roller works would anyway be discretized. It is a good method to obtain, for example, a variable step auger, but to get a cam I design the median line of the path on the plane, I build around a solid with the section of the pin ( adding if you need some mm on the thickness to deepen the quarry) then wrap it on the diameter of the tree and subraggo to the tree itself. It's good and takes a little time. of the small cams designed so I made them do it inconel with the 3d print and the crazy pin passed well, so the geometry of the walls of the quarry was correct.
but it may be that I didn't understand your procedure well and maybe you've done exactly the way I'm pointing out... .

 

[cacciatorino]

good day to all is the promo message I write on the forum and I do not want to do something wrong, since I am not very practical of social, so I apologize in advance
work in a mechanical workshop for more than 20 years and the beauty of this work is that you never stop learning.
I did a lot of research and I couldn't find an answer to the problem I have.
As an object I have to realize a drum cam that rotates a plate with six rollers, I have already realized the path I wrapped it on the cylinder and cut with swep.

This video shows what I have to do.
I wondered if, having already the path developed with camliks I can simulate the rotation of the plate with relative removal of the material, to generate so a correct surface.

thanks in advance

Do you have to walk or fall? I the ones I saw made of cams were made with cutters of diameter considerably lower than that of the roller (also half'), making the quarry in several past.

 

[Gzda]

It is an argument already treated by far more authoritative colleagues, but instead of you I would not do the removal by iterating the subtraction of the roller (in fact of the rollers, because you will have more than one engaged in the cam) because you should turn the axis of the cam continuously and the bat according to the law of motion of the intermitter and already is not easy, but the surface of the two sides where the roller works would anyway be discretized. It is a good method to obtain, for example, a variable step auger, but to get a cam I design the median line of the path on the plane, I build around a solid with the section of the pin ( adding if you need some mm on the thickness to deepen the quarry) then wrap it on the diameter of the tree and subraggo to the tree itself. It's good and takes a little time. of the small cams designed so I made them do it inconel with the 3d print and the crazy pin passed well, so the geometry of the walls of the quarry was correct.
but it may be that I didn't understand your procedure well and maybe you've done exactly the way I'm pointing out... .

I've done faults you said, the problem that to do the right side needs a further correction.
we assume that we have a mill of the same diameter of the roller and to carry out the quarry in a single pass, in this case the mill will not have to follow a movement along the axis of the cam but will have to advance following an arc of circumference or the path of the roller bound to the plate.

 

[Gzda]

Do you have to walk or fall? I the ones I saw made of cams were made with cutters of diameter considerably lower than that of the roller (also half'), making the quarry in several past.

I have to make the solid model to import into the cam.

 

[MassiVonWeizen]

write the version of dolid in the profile
attach your file and explain where you find problems.
you can simulate the milling; models the body that represents the frieze and in the sweep you make a cut through body instead by profile

 

[Gzda]

write the version of dolid in the profile
attach your file and explain where you find problems.
you can simulate the milling; models the body that represents the frieze and in the sweep you make a cut through body instead by profile

I use the 2016 version, I did the sweep cut and it's not good, then I did a bolean subtraction and that's not good.
the file I have nn is nothing but a spline, the difficulty I find it in the fact that the nn roller is never on the cam axis but moves in function of the breast of the angle taken from the piattello in every point of the spline.
there are programs like camtrax64 that generate a list of points with the correct profile, but it would be an additional investment.

having already listed points with the Intermitter Law I hope to find a method related to sw

 

[MassiVonWeizen]

but the last video you've attached is made by you? If not, is that what you want to get? if you do not follow it faithfully?

the file I have nn is just a spline

So is it better if we do it from scratch with values at home? Why can't you spend 2 minutes zipping a file and attaching it?

discussion about the sweep digging

Richiesta di aiuto

Buon giorno. Devo simulare la lavorazione di una fresa tonda Ø 5 mm. su un cilindro di 20 mm. di diametro, facendole percorrere un'elica per 180° con passo di 34 mm. Quale comando posso usare? Grazie in anticipo a chi risponderà.

www.cad3d.it

 

[Gzda]

but the last video you've attached is made by you? If not, is that what you want to get? if you do not follow it faithfully?

So is it better if we do it from scratch with values at home? Why can't you spend 2 minutes zipping a file and attaching it?

discussion about the sweep digging

Richiesta di aiuto

Buon giorno. Devo simulare la lavorazione di una fresa tonda Ø 5 mm. su un cilindro di 20 mm. di diametro, facendole percorrere un'elica per 180° con passo di 34 mm. Quale comando posso usare? Grazie in anticipo a chi risponderà.

www.cad3d.it

the video I found it on you tube and to generate that kind of solid took advantage of an additional program called camtrax64 that I do not possess.
There is no problem for me to attach a file of points in excel format but I would like to understand if with the only sw you can get a similar result.

 

[Gzda]

but the last video you've attached is made by you? If not, is that what you want to get? if you do not follow it faithfully?

So is it better if we do it from scratch with values at home? Why can't you spend 2 minutes zipping a file and attaching it?

discussion about the sweep digging

Richiesta di aiuto

Buon giorno. Devo simulare la lavorazione di una fresa tonda Ø 5 mm. su un cilindro di 20 mm. di diametro, facendole percorrere un'elica per 180° con passo di 34 mm. Quale comando posso usare? Grazie in anticipo a chi risponderà.

www.cad3d.it

Thank you for the link to the discussion now I read everything.

 

[welcome to the machine]

not within the merit of the sw commands I do not know, but from the geometric point of view what says gzda is absolutely correct: the fact that the yielder describes an arc involves a profile of the quarry more complex than that obtained simply by subtracting the motive a solid built on a spline. the cam follower wouldn't leave the quarry...
I had made an oscillator, not an intermittent, and the crazy pin moved on the same plane as the motive axis....parecchio easier than the gzda problem. ?

 

[Gzda]

Thank you for the link to the discussion now I read everything.

not within the merit of the sw commands I do not know, but from the geometric point of view what says gzda is absolutely correct: the fact that the yielder describes an arc involves a profile of the quarry more complex than that obtained simply by subtracting the motive a solid built on a spline. the cam follower wouldn't leave the quarry...
I had made an oscillator, not an intermittent, and the crazy pin moved on the same plane as the motive axis....parecchio easier than the gzda problem. ?

exactly?