Spindle moments

[aldumoul]

I believe I have the reactions right… for the motor and belt pull portion. What I can’t wrap my head around is the moments caused by the tooling. My colleague and I have been debating… he thinks there is an axial load of 707 N and radial load of 707 N because of the angle of the tool. The tool has the capability to go perpendicular to the spindle axis…

What would be the right approach to completing reactions A & B? This is a spinning operation.

 

[GregLocock]

Wow, niche processes'r'us.

Draw a close up of the tool tip and the part being formed, I think your colleague is on the right track, but perhaps for the wrong reason - the profile of the wheel on the tool gives the angled effect, not the angle of the axis of the roller or the plunge direction. There must be an axial force and a radial force to get the metal to bend and reduce in diameter.

If this is a production machine, overdesign it, ie use 1000 in both X and Y. Spinning is more art than science in my opinion.

However if you want to be elegant

https://www.sciencedirect.com/science/article/abs/pii/S0924013611002202

may help.

Perusal of the references in this might help

https://ijret.org/volumes/2014v03/i02/IJRET20140302012.pdf

Cheers

Greg Locock


New here? Try reading these, they might help FAQ731-376

http://eng-tips.com/market.cfm?

 

[aldumoul]

Thanks for the reads, very interesting. I’d rather err on the side of caution and provide a robust solution. Moreover, I agree with you… 1k lbs in x and y. I am going to give the calcs to our senior engineer and see what he thinks.

New to this position, been designing tooling, fixtures before this. Had to reach back into the ole statics book to brush up. I’ll reach back after I get feedback.

 

[GregLocock]

Just thinking about the force initially when you are knocking the disc over it is axial, as you finish the part it is radial.

Cheers

Greg Locock


New here? Try reading these, they might help FAQ731-376

http://eng-tips.com/market.cfm?

 

[aldumoul]

So, I have moments created by belt pull, motor torque, axial and radial loads from tooling. I can consolidate it all and I get about 5,000 hrs. What I’m not sure of… is if I should exclude motor torque. If this was a sawing or machining operation, I believe I’d want to include it. Please let me know your thoughts.