lifting of a serious - tips

[elpedrugio]

Hello everyone, I am a mechanical designer and I wanted to ask for your advice on an application in an automatic machine.

I find myself having to lift a coil ø1100 x 1000mm with spindle ø70/75.
the coil of about 500kg is carried manually in the lifting area, at the center between 2 lifts, then the shaft is threaded and at its ends the bearings are threaded.
after that the lifts are raised which intercept the bearing in the obtained seat. lifting speed has no precise constraints, it can also be very slow.

I don't think the solution is functional since
1) the inner ring of the bearing (because it has to be threaded and paraded from the shaft to be able to introduce it and extract it from the coil) does not have a tightened coupling with the shaft even if it should (since the shaft assemble + coil once lifted to working height, wheel through a higher roller with n coil = 3-5 rpm)

2) Given the inaccuracy of positioning of the coil the bearing seats are wider than the bearing itself for between the face of imprecision (e.g. b bearing = 25, l seat = 40)

3) the outer ring of the bearing is in contact with the seat only in the lower semicircumference since the lifters can not run sideways but only vertically

What do you think? Is there a better system to perform the operation described at first? allego schematic

Thank you in advance for your help

elpedrugio:smile:

 

[lollo3d]

but why are the bearings inserted later?
Why not use rollers on the support instead of applying the bearings after the pin positioning? I think the diameter of the tree is always the same?

 

[elpedrugio]

but why are the bearings inserted later?
Why not use rollers on the support instead of applying the bearings after the pin positioning? I think the diameter of the tree is always the same?

What do you mean by rollers? roller bearings or roller conveyor with circular matrix? for how is the layout now the bearings are inserted after for reasons of size (external ring > coil spindle). currently the sequence is this: little precise positioning coil, inserting shaft, inserting bearings and finally lifting. . .

exist rollers that adapt to the semicircular profile of a tree? (if I know what you mean)

ps.: the shaft is not always the same, because otherwise it would lose too much, the part in contact with the coil spindle is 69mm the ends are smaller. I did a bending analysis and the smaller section would already suffice

 

[stefanobruno]

but why are the bearings inserted later?
Why not use rollers on the support instead of applying the bearings after the pin positioning? I think the diameter of the tree is always the same?

this that wrote "lollo 3d" is the usual system for that application.
the only drawback is the quality of the material and surface of the shaft that, rolling on the outer ring of the bearings, is crumble.


Bye.

 

[elpedrugio]

this that wrote "lollo 3d" is the usual system for that application.
the only drawback is the quality of the material and surface of the shaft that, rolling on the outer ring of the bearings, is crumble.


Bye.

Thank you very much, so can you tell me some names to go to see the catalogs of this product? I never used it before so forgive my poor preparation. . .

the fact of the incrudiment on one side can be comfortable seen the increase of superficial hardness (in addition the axieme is not subject to shocks or fast rotations), possibly I can calettare a bushing to be replaced easily.

 

[stefanobruno]

Thank you very much, so can you tell me some names to go to see the catalogs of this product? I never used it before so forgive my poor preparation. . .

the fact of the incrudiment on one side can be comfortable seen the increase of superficial hardness (in addition the axieme is not subject to shocks or fast rotations), possibly I can calettare a bushing to be replaced easily.

I added a pdf to the previous message

 

[elpedrugio]

I added a pdf to the previous message

I understand, very clear and exhaustive stefanobruno:biggrin:

Thank you very much to all