Cutting Forces
Hi B,
The theory sound great. What are you using - the Rankine formula?
You would need to do some research on plowing technology, or front-end tractor bucket design.
When all else fails, forget the highly theoretical formulation. Your bucket wheel motor has a stall capacity. that is the maximum torque you will see on the bucket-wheel shaft. How that torque is distributed to force & lever arm at the cutting face is highly academic. You can start by using common sense, and some reasonable assumption for lumped parameter forces.
That puts you in the field of basic design data. If you are not careful you will generate GIGO (garbage in - garbage out). Or, more accurately wobbly assumptions up front, and very impressive technicolour displays of computer precision as output.
At design stage you are actually looking at a RANGE of possible force-level arm interaction. Which extreme are you trying to define?
Have fun - Sgt John Rozentals
CEO Bionic Research Institute
www.latviantourists.com.au ■
Re: Cutting Forces In Shovels
Originally posted by Foresti
Hello!
I´m estimating some forces in order to perform a finite element based analisys of a bucket wheel reclaimer. But i haven´t found yet a solid formulation about the cutting forces on the shovel of such type of equipment. So i would like to know if could you please tell me how to calculate these forces?
As i haven´t found a formulation, i decided to propose my own. And at the level i´m, i need to know some phisical properties of the iron ore i´m dealing. I would need to know the internal friction angle and the cohesion of this ore pile.
Thanks for all!
B. Foresti
Parallel crowding force and crowding forces are what you are looking for. ■
Cutting Force In Buckets Of Bwr
Dear Mr. Foresti,
The cutting force to be consider are as given below.
1. 50 pounds per inch. of bucket cutting face for coal.
2. 75-125 pounds per inch of bucket cutting face for iron.
You may go through the book written by RASPER.
The above values are taken from page no 152 of Stacking & blending by R.H. Wohlbier
Regards.
A.Banerjee ■
Cutting forces in shovels
Hello!
I´m estimating some forces in order to perform a finite element based analisys of a bucket wheel reclaimer. But i haven´t found yet a solid formulation about the cutting forces on the shovel of such type of equipment. So i would like to know if could you please tell me how to calculate these forces?
As i haven´t found a formulation, i decided to propose my own. And at the level i´m, i need to know some phisical properties of the iron ore i´m dealing. I would need to know the internal friction angle and the cohesion of this ore pile.
Thanks for all!
B. Foresti ■