various types of axial locking

[soundsurf420]

hey everybody, during the study for the technical drawing exam I came across the locking Axial components coupled to a tree. wishing to make clarity on the subject, which is not systematically treated in the books suggested by the professor, I came to the conclusion (analyzing various material) that the axial locking of an element, where not made by sticks or thorns, is realized in various ways (distantial, often reported can be traced back to the following):
1) shoulder and ring seeger
2) shoulder and washer
· closure with clamping screw
· closure with nut and contradado
· closure with safety rosette and wreath
3) tree conicity (+ closing)

Are there other options beyond these?

in most cases solutions 1) and 2) are adopted while solution 3) does not have the same popularity. are there cases where 3) is not advisable and/or cases where it is?

thanks in advance

 

[meccanicamg]

Bye. theoretical question rather banal but not in the answer.
methods can be mechanical impact locks, so shoulders, servers, wreaths, nuts, special washers with two or more screws to give shot (used on the shaft terminals to usually block bearings or pulleys).
there may be other methods such as thorn with cylindrical, conical or elastic plug of two elements turning radially.
there are cylindrical mounts with interference.
you can drill and thread a shaft with a hub on the diameter of the shaft and plant a grain.
There are those from a welding point.
There are circular conical couplings. . ..conickeys with or without hanger etc.

 

[MassiVonWeizen]

an axial locking system is seen in this design with the particular pos. 6 blocked by wheat pos. 7https://www.cad3d.it/forum1/attachments/untitled2-png.56111/

 

[SMIRRO]

I reconnect to this discussion for a doubt that came to me on the use of grains as a method of locking, more precisely on the type of grains.
usually use flat-headed grains both for locking on trees (which do not have too much stress) that present a sling, which trees that present the cylindrical surface.
during a comparison I was doubtful, since someone claimed that for mounting on cylindrical surface it would be better to use the conical point.
Now, unless the tree is of a yielding material that allows it to be indented in the assembly, I do not see justification in using the pointed ones regarding those planes, which would allow contact on a line instead of on a point.
I also ask your opinion on this.

 

[MassiVonWeizen]

the tip can be used if a slight footprint is made on the tree, for example with a drill.
otherwise I don't think it changes much even if as you say that flat has a greater contact

 

[TECNOMODEL]

the tip can be used if a slight footprint is made on the tree, for example with a drill.
otherwise I don't think it changes much even if as you say that flat has a greater contact

even because, if you do not make a mark, the tree deforms in the area where the grain is planted and after pains to extract it.

 

[Chris_BRB]

I reconnect to this discussion for a doubt that came to me on the use of grains as a method of locking, more precisely on the type of grains.
usually use flat-headed grains both for locking on trees (which do not have too much stress) that present a sling, which trees that present the cylindrical surface.
during a comparison I was doubtful, since someone claimed that for mounting on cylindrical surface it would be better to use the conical point.
Now, unless the tree is of a yielding material that allows it to be indented in the assembly, I do not see justification in using the pointed ones regarding those planes, which would allow contact on a line instead of on a point.
I also ask your opinion on this.

I use conical pointers and make a turning on the diameter with the mark of the grain corner

 

[MassiVonWeizen]

I use conical pointers and make a turning on the diameter with the mark of the grain corner

but so create an area subject to possible breaks

 

[SMIRRO]

but so create an area subject to possible breaks

I agree.
I would only use it for pins easily and frequently removable in axial sense, coupled with a die, a grain with spring ball.

 

[Chris_BRB]

but so create an area subject to possible breaks

in fact I try to avoid using this type of axial locking with great forces in play precisely for this danger, but to make simple axial stops when there are forces in play low they go benign

 

[meccanicamg]

I reconnect to this discussion for a doubt that came to me on the use of grains as a method of locking, more precisely on the type of grains.
usually use flat-headed grains both for locking on trees (which do not have too much stress) that present a sling, which trees that present the cylindrical surface.
during a comparison I was doubtful, since someone claimed that for mounting on cylindrical surface it would be better to use the conical point.
Now, unless the tree is of a yielding material that allows it to be indented in the assembly, I do not see justification in using the pointed ones regarding those planes, which would allow contact on a line instead of on a point.
I also ask your opinion on this.

But first you have to do a niche with the helical tip. If you don't, you have to hope that the grain will improve the tree.