flangeed shirt

[buttione]

Good morning to all I am an industrial engineering student and I have to make a mechanical technology project whose object is a flangeed shirt. as functionality I decided to mount it on an electromechanical pencil and I made a 3d and I now have to do the overall. But I have heard some of my colleagues who say that the engine shaft has to put bearings in order to avoid tree movements, only that I find nothing exhausting on the internet, someone of you could give me an idea?

in the annex I put the pdf of my piece

 

[PierArg]

Hi.
First I suggest you introduce yourself to the appropriate area as a regulation (I think you haven't done it yet).

Second, I can't understand what you mean. Couldn't you explain yourself better?

 

[buttione]

Sorry, but I didn't find the presentation tread.
However my problem concerns what kind of bearings to put to the motor shaft I would post the piece in 3d maybe could help you however here are like the dogs if place the piece and find it I'm sure screwed it also seen the time used to find the functionality. under my flangeed shirt there is mounted a motor shaft and its engine and I would like to know how and whether to put the bearings to the motor shaft and what type of bearings, and if it is not too disturbing perhaps at the design level how to get the hole on the trunk surface

 

[tortellino]

If the problem is that you care about the tree, you can post your tree by applying sform angles so that no one can trace back to the odds.
(Take a tree, then! if one is unable to find a diameter it is better than change faculty).

cmq you haven't even gone so smooth, since that flange you've been posting has been in Roman universities for years, and you're appropriate by putting us under the title.

cmq I keep not understanding the problem.
Do you have a tree?
If you have it, calculate the binding reactions and put on it the suitable bearing.
I don't think I'm talking about difficult things. . .

 

[buttione]

then the problem is not the tree as the project focuses on the work to be done to get the piece and not the functionality itself. If that piece has been running for years in Roman universities I would like to see some projects that have realized them since the piece has been assigned to us by the teacher. my problem is that the prof did not explain and are not even included in the topic program such as binding reactions on the tree or types of bearings for this I look for help in this forum

 

[tortellino]

but it is obvious that he did not explain the binding reactions.
that is the task of the prof. of physics 1 and the prof. of applied mechanics.
the bearings instead you make them drawing and still applied mechanics, where they teach you to find the right bearing given the load that weighs on us and its duration.

the piece that assigned you instead is one of the first pieces that is drawn to the mechanical drawing course, just to make you understand what mechanical engineering is.

you basically, given the tree you have to do what is called worksheet, I think I understand... .

 

[paulpaul]

then the problem is not the tree as the project focuses on the work to be done to get the piece and not the functionality itself. If that piece has been running for years in Roman universities I would like to see some projects that have realized them since the piece has been assigned to us by the teacher. my problem is that the prof did not explain and are not even included in the topic program such as binding reactions on the tree or types of bearings for this I look for help in this forum

Hi.

Forgive me, but I just can't figure out what you need... maybe because I just ate and a little blood comes to my brain! :biggrin:

Are you kidding, put a shirt and then ask for a tree? the type of bearing to be used depends on many considerations, such as assembly, speed, loads, dimensions....or I would first of all a choice between smooth bearing (volg. bronze) or rolling. loads, speeds, diameters of the counter pins and at least an idea of how you want to make the tree before you operate this fundamental choice. then in one case or another they will have to follow other considerations... but for now I would clarify the first point!

 

[PierArg]

but it is obvious that he did not explain the binding reactions.
that is the task of the prof. of physics 1 and the prof. of applied mechanics.
the bearings instead you make them drawing and still applied mechanics, where they teach you to find the right bearing given the load that weighs on us and its duration.

the piece that assigned you instead is one of the first pieces that is drawn to the mechanical drawing course, just to make you understand what mechanical engineering is.

you basically, given the tree you have to do what is called worksheet, I think I understand... .

I'm in full!

I think it's like tortellino. You have to do the worksheet.

the reason why you have to give it a function is because according to how you use it change tolerances, machining, surface finishes, treatments, etc.

If you can, just post the prof track, so we can help you better.
not knowing the goal of your exercise we cannot help you more than ever:frown:

 

[buttione]

You are right excuse me so much but often hard to understand what I ask, even because they are the first weapons in this field.
However I attach the material that gave us prof.

 

[PierArg]

You are right excuse me so much but often hard to understand what I ask, even because they are the first weapons in this field.
However I attach the material that gave us prof.

Don't worry!: we've all been through!

So, I took a quick look and it's almost like I and tortellino said.
the design with the mechanical dimensioning has nothing to do with it.

you simply have to start from a piece and:
- analyze it from the functional point of view: make a report where you describe the application where it will work.
Perhaps you could make a drawing of the machine that contains your piece so that you can see the various functional and non-functional surfaces.

- think how you want to make it. from the full (it does not seem to me the case...too easy and expensive, even if the costs at university are never "contemplated"), by fusion (it seems to me the most indicated for as "desirable" the professor), by molding, etc.

- make the drawings of the crude and finished with so much tolerances, overmetals and surface finishes.
remember that this part is the most important because when you work you will have to do with it every day of this "roba".

- then you have to do all those menades there, which in my opinion involve a total loss of useless time, of the technical cards of the machinery (addressing the standard equipment...boh!?!), of the tools, etc.
(do not worry because this part in the working field does not serve a bat).
But you giant headlightsYou don't want to take 18, do you? Go to the top and then you have to do everything right!

- then you have to do the processing tag: is a very nice detail and I appreciate. If your prof has lost reputation in asking for the "catalogues" of the machinery, he will regain it in this case.

However if you follow the pdf should be clear.


now, however, "let's start" and begin to make the total of your system where you expect your component to be used.
then proceed with the analysis (page 1 and 2 of pdf) and keep us informed with feed-backs.

 

[buttione]

First of all I thank you, the overall choices of functional surfaces the characteristics of steel 100cr6 and the choice of lathe and milling have already been made. My problem now is that we have to achieve it only with particle removal, so I don't know how to choose the tools to be applied to the machines and how to make the hole on the trunk surface.

 

[enri09]

I would have chosen a drill-fresh or a so-called "fast-headed mill" and not a milling machine.
the realization of the piece is not difficult:
- depart from a cylinder d=70 l=82 (cut with a sawer from a bar)
- Grab in the lathe truck
-execute cylindrical turning d=37.5 l=15 shouldering and d=67.5
- drill the hole d=24 and the internal turning d=30
-turn the piece and grab it in the lathe autocentre on the d=67.5
- perform a cylindrical turning d=37.5 l=57
-execute the conical turning (breaking the longitudinal axis of the turret)
- grab the piece in the autocentre of a divider on the drill counter on the d=67.5 (with the cone inside the autocentre)
-execute the 8 holes d=6 (first with tip from centers, then with helical tip)
- Grab the piece in a clamp mounted on the drill counter,
- drill the hole d=6 (first with tip from centers, then with helical tip)

 

[buttione]

Excuse me, but the fact that the surface is conical can't give me any problems?

 

[enri09]

Yes, but on the parallel lathes, there is the possibility to rotate the second longitudinal axis (the one with the higher flyer) to obtain conical surfaces.
4 screws loosen and turn the desired angle using the graduation that is moulded on the turret.
If you've never seen him look to have an idea this video: http://www.youtube.com/watch?v=okqcdesrdwi from min 4.35 show the operation I just described you.

 

[PierArg]

First of all I thank you, the overall choices of functional surfaces the characteristics of steel 100cr6 and the choice of lathe and milling have already been made. My problem now is that we have to achieve it only with particle removal, so I don't know how to choose the tools to be applied to the machines and how to make the hole on the trunk surface.

So you're in the group with steel material?
in this case you must start from bar and proceed as it said enri09

 

[buttione]

ok thank you I think I understand now but I have problems on how to choose the materials of the tool since my piece is in 100cr6

 

[enri09]

100cr6 is a normal tempering steel.
the mechanical characteristics of the rectified state (what you will need to use for machining removal) are similar to those of the c40, so no problem if you use tools with sintered carbide inserts.
look here for the tools: http://www2.sandvik.com/sandvik/2500/internet/coromant/it01050.nsf (-- > find product data-- > search application)

Having regard to the material, if the prof requires tempering or reclaiming, with the turning, you must expect an overmetal of 0.2-0.3 mm for subsequent grinding.

 

[buttione]

I thank you infinitely if you pass around here I make you taste some typical products, for now I continue to go on hoping not to have any other problems, in case I resent here

 

[PierArg]

I thank you infinitely if you pass around here I make you taste some typical products, for now I continue to go on hoping not to have any other problems, in case I resent here

riquoto enri09 (compliments really prepared in mechanical technology)

As for you, buttione, thank you for the proposal!:biggrin:
but be careful because I am Calabrian and about 2/3 times a year I come down right from the puglia!:tongue:

when you want to post your feed-backs, so let's see if we can help you further.

 

[tortellino]

Nice discussion.
I always say: when users are not deliberately polemical and/or prevented against other users, the harmony that is created helps the whole forum.

take example from me