Production cost: THREE FACTORS
The guiding principle behind the choice of technology to be used is that of the lowest production cost.
This is given by adding up three factors.
Cost Of The Raw Material
The first is the cost of the raw material, which may be in sheets (for the sheet fed punching machines) or coil (for the coil punching machines and press stamping).
The cost for all the raw material necessary for completing production is considered.
Cost of the tools
To this should be added the cost of the tools.
The tools for the punch presses with sheet metal or for the coil punching machines are standard punches available from various manufacturers (e.g. thick turret punches).
The latter produce a standard shape (round or square holes and so on) or special shapes at every stroke of the punching machine.
The tool for the stamping press is made to measure for the product to be manufactured.
The standard punches undoubtedly have lower costs than the special press tools.
Cost of the machine
The last factor is the hourly cost of the machine, which is multiplied by the hours that the machine will require to complete the production.
All this is summed up by the formula:
[production cost] = [raw material] + [tools] + [hourly cost] x [hours of production].
Fig. 6 gives the meaning of this formula in graphic form.
Fig. 6
Composizione del
costo della
produzione in
funzione delle ore
di produzione.
"Punching and stamping: how to compare production cost."
Article taken from "Lamiera" Magazine: October 2005