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correctly quote a technical design

  • Thread starter Thread starter _Pietro_
  • Start date Start date
banda bassotti said:
excellent advice, especially the design of mbt I would remove even the joke and replace it with a spacer ... but three equal spacers...so you can buy a rectified and chromed stem to trade without even having to return it, you mean the holes and the game is done.
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right, great suggestion. . .
taken from the speed I copied the tree (which in parentheses is listed by dogs, to be a set) and I bowed on two spacers and two rosettes. . .
Meccbell said:
ok to uniform bearings and spacers, but for the head washers I am not convinced.
it costs less to make thread and quarry for the safety rosette than to make axial drilling of the shaft.
And the two washers with the holes you have to do them on purpose, while the wreaths and the rosettes are already beautiful that ready and in addition to you the "get behind" of surcharge.
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appreciated comment, yours, being on the part of those who "must build" what others draw
This proves for the umpteenth time that mechanics is not an exact science. every choice is opinable, leads to certain advantages and other disadvantages, and however it is not clear what it is best to do.
I personally appreciate the wreaths, but I regularly wonder if it costs more an external thread m40 with its good seat for the rosette or 2 holes m8 to do with drill and male.
considering also that I have to have the key to the wrench while a 13 key I have it in the set of car attrays.
besides the space of manoeuvre, which is not so obvious....
Similar considerations for seegers, which cost little, are easy to install, but do not offer locking guarantees of the inner ring. in the presence of rotating loads on the inner ring of the bearing, the latter should be blocked, but with a seeger I should do it with a coupling for interference.
instead with threaded wreaths or end rosettes I can use the axial clamping.... simplifying not little assembly operations. . .

see pietro... these are the considerations to be made when drawing.
I don't know your teacher. I don't know who's prepared.
but if I were a teacher, I'd like to hear a student who asks me these questions. means that he reasoned a lot before giving birth to a drawing....
 
MBT said:
right, great suggestion. . .
taken from the speed I copied the tree (which in parentheses is listed by dogs, to be a set) and I bowed on two spacers and two rosettes. . .


appreciated comment, yours, being on the part of those who "must build" what others draw
This proves for the umpteenth time that mechanics is not an exact science. every choice is opinable, leads to certain advantages and other disadvantages, and however it is not clear what it is best to do.
I personally appreciate the wreaths, but I regularly wonder if it costs more an external thread m40 with its good seat for the rosette or 2 holes m8 to do with drill and male.
considering also that I have to have the key to the wrench while a 13 key I have it in the set of car attrays.
besides the space of manoeuvre, which is not so obvious....
Similar considerations for seegers, which cost little, are easy to install, but do not offer locking guarantees of the inner ring. in the presence of rotating loads on the inner ring of the bearing, the latter should be blocked, but with a seeger I should do it with a coupling for interference.
instead with threaded wreaths or end rosettes I can use the axial clamping.... simplifying not little assembly operations. . .

see pietro... these are the considerations to be made when drawing.
I don't know your teacher. I don't know who's prepared.
but if I were a teacher, I'd like to hear a student who asks me these questions. means that he reasoned a lot before giving birth to a drawing....
Click to expand...
I have to admit that said land here there are people who know....:biggrin:
every answer is a chapter of mechanics. .
on the fact that my colleagues in the forum do not comment. ..it would be nice though as what...all sitting in front of the pc to learn from you..
And I inform you, mbt that my beloved prof thinks just like you... every joke in class assigns an exercise... .
I have a full notebook!!!! (at least I am useful and I can afford a laugh:biggrin:)


seriously speaking I think I could do in the three recommended ways (segeer, wreaths and vines) and then I try to ask my teacher what he thinks is better..ahahahha opinions in comparison. .

even if honestly I will not worry about the costs...it's already so much if I can do the test!!

tomorrow I make the drawings (so on autocad I put a moment) and then let's discuss a little on the carcass that is a nice drama for me...
Thank you for your time.:smile:
 
already better but you are sure of the assembly of the wreaths if it is not particular stuff you should mount to the contrary.
 
MBT said:
apart from missing lines... .
However the installation can be done so
the needles are correctly mounted
Remember the threads for wreaths, its good exhaust gorges and gorges to lock the rosette.
Click to expand...
before "mount" the wreath on the tree I drew it apart.. .
When I climbed it on the tree, I erased all the lines because I don't know what they should be left and which ones are erased. .
Instead it will seem trivial but the front view of the rosette I can't do it... I can't represent the "dents" (it's a mess).

Now I go out... when I get back I make the same design with the screws instead of the wreaths.. .
 
I liked the middle shoulder version more.
In the sense that this must be packaged and it is more difficult to establish the axial position of the whole block.

even if you could first mount a wreath and its rosette on an extremity of the tree and then to the press insert the tree on the parcel of the pieces until the already mounted wreath, then mount and tighten the 2nd wreath.

But in this case, if anything's out of alignment, like a slightly dazzling spacer or one of the blurred tabs, then you might have undesirable "collateral" effects.

and anyway, in any case, you should play on the tolerances of the couplings to try to put the pieces in place only in the final section of the assembly.
 
MBT said:
I personally appreciate the wreaths, but I regularly wonder if it costs more an external thread m40 with its good seat for the rosette or 2 holes m8 to do with drill and male.
considering also that I have to have the key to the wrench while a 13 key I have it in the set of car attrays.
besides the space of manoeuvre, which is not so obvious....
Click to expand...
I'm laughing like that
Okay, I already have the piece on the lathe.
Safety rosette quarries: idem as above, as I already have to fresate the offices for tabs and placing is the same.

head holes: I have to track the piece and go on a drill, so I already have two more steps, which in some "structured" companies mean at least a couple of hours just to move from the tracker to the trapanist.
besides the fact that I have to build the 2 washers with the 2 holes.

If you tell me "ok, but we do everything on a cnc lathe with motorized tools" then I tell you more, as with the version to wreaths the machine only for 1 particular (the shaft) and not even for the washers. less particular = less programs and less setup. :wink:

for the "special" key I might also agree, but apart from that in a newly equipped workshop of keys to the industry you usually find the series from 25 to at least 120, the cost of the key already repays after 1 piece.
And then you put that they don't have the key to the m8 screws?
 
Meccbell said:
I'm laughing like that
Okay, I already have the piece on the lathe.
Safety rosette quarries: idem as above, as I already have to fresate the offices for tabs and placing is the same.

head holes: I have to track the piece and go on a drill, so I already have two more steps, which in some "structured" companies mean at least a couple of hours just to move from the tracker to the trapanist.
besides the fact that I have to build the 2 washers with the 2 holes.

If you tell me "ok, but we do everything on a cnc lathe with motorized tools" then I tell you more, as with the version to wreaths the machine only for 1 particular (the shaft) and not even for the washers. less particular = less programs and less setup. :wink:
Click to expand...
the right considerations. . .
I have nothing to fight, but you are the expert on this matter:finger:
Meccbell said:
for the "special" key I might also agree, but apart from that in a newly equipped workshop of keys to the industry you usually find the series from 25 to at least 120, the cost of the key already repays after 1 piece.
And then you put that they don't have the key to the m8 screws?
Click to expand...
eehhh... .
Look, you find everything in the shop.
in the maintenance departments you will certainly find mazza and cannello. some English key, turntables, pliers and ties.
Let's say a m8 screw gives you a string. It's another story.
 
MBT said:
right, great suggestion. . .

Similar considerations for seegers, which cost little, are easy to install, but do not offer locking guarantees of the inner ring. in the presence of rotating loads on the inner ring of the bearing, the latter should be blocked, but with a seeger I should do it with a coupling for interference.
....
Click to expand...
but in this application (but I would say for 99.9%) the inner ring (i.e. the bearing) must always be thrown up for interference! !
the loads are evaluated and then you decide how much interference you have to give!

and so also in the wheel packs of motorcycles!
 
[DA MECCBELL]I liked the middle shoulder version more.
In the sense that this must be packaged and it is more difficult to establish the axial position of the whole block.I fully agree... in a mounting line it would be easier to pack everything right and all left on the shoulder! ...it would be the type mounting to the test of ammaestrata monkey!:biggrin:
 
Mr.Panda said:
but in this application (but I would say for 99.9%) the inner ring (i.e. the bearing) must always be thrown up for interference! !
the loads are evaluated and then you decide how much interference you have to give!

and so also in the wheel packs of motorcycles!
Click to expand...
must be blocked the inner ring.... not necessarily mounted with interference.
as far as I know, if the loads are not high, you can tolerate, in the name of the ease of assembly, a correct "blanda" interference then from a good axial lock that blocks the inner ring
 
_Pietro_ said:
What do you say? ? ? ?
View attachment 13149
Click to expand...
I don't want to pee.
it would be better to make the tree with slightly differentiated diameters so as not to have to slide the elements that mounts in the center of the tree for a long stretch.
think about how they will have fun in the workshop to center the gear tab mounted to the left.
It is true that so you work less the tree, but you ruin it all when you put the pieces.
for what concerns giving a defined reference for assembly (central shouldering), you could make the tab under the long sx gear as the thickness of the gear itself, so that the two spacers dx and sx of the gear itself go to lean, therefore forcing the mounting position.

Bye.
 
stefanobruno said:
I don't want to pee.
it would be better to make the tree with slightly differentiated diameters so as not to have to slide the elements that mounts in the center of the tree for a long stretch.
think about how they will have fun in the workshop to center the gear tab mounted to the left.
Bye.
Click to expand...
That's weird.
 

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