Cutting Blade Design
Cutting Blade Design
(OP)
I am looking for resources to help with the design of a guillotine type blade or simply cutting blades in general. I have a basic idea of my dimensions but would like to know if there is a source of best practices when it comes to the design of cutting blades geometry and material selection.
Thanks everyone!
Thanks everyone!





RE: Cutting Blade Design
There are literally volumes of books written on cutting edges of tools and how best to prepare them.
RE: Cutting Blade Design
Lots of details are needed.
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P.E. Metallurgy, Plymouth Tube
RE: Cutting Blade Design
For a little more insight I am looking into automating a packing cutter similar to this
Any resources at all when it comes to tool cutting edge would be very much appreciated.
I apologise if I am not being clear enough I am still very much learning.
RE: Cutting Blade Design
The blades needs to be stiff and well guided so that it doesn't deform.
Sometimes the cutting blade is held into a thicker holder for support.
Couldn't you buy one and automate it? (air cylinders, safety switches, sensors, controls)
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P.E. Metallurgy, Plymouth Tube
RE: Cutting Blade Design
RE: Cutting Blade Design
You can buy such machines from these folks:
https://www.markenmfg.com/automatic-cutting-machin...#
Of course there are other manufacturers, but Marken provided a machine that worked out of the box, for less money than I had already spent on unsuccessful homebrews, for cutting bulk refrigeration hose, and they were enormously helpful both before and after the sale.
Mike Halloran
Pembroke Pines, FL, USA
RE: Cutting Blade Design
That's a good place to start thank you! I will check the manufacturers sites. From what you and Ed have advised it seems like the cutter will definitely need to be held on all sides to avoid problems with the cut due to the mixed fibers.
I will definitely keep this in mind, Unfortunately the company I am interning with already invested a decent sum into an attempted cutter and plc+drive system around it. The previous person who worked on this system never saw it to completion so they are still pretty invested in the homebrew option.
RE: Cutting Blade Design
RE: Cutting Blade Design
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P.E. Metallurgy, Plymouth Tube
RE: Cutting Blade Design
RE: Cutting Blade Design
Failing that, I'd whip the stuff on both sides of the cut line, and try running a hot blade through it. I'm thinking something that looks like a traditional safety razor blade, but longer, with an electric current running through it, sufficient to get it to a few hundred degrees F. Keep a fire extinguisher nearby.
A little searching reveals that hot knives are the hot setup for cutting stuff like climbing ropes, which are very difficult to cut with a cold knife. There must be one big enough to cut a hawser, which is basically what you need.
Mike Halloran
Pembroke Pines, FL, USA
RE: Cutting Blade Design
RE: Cutting Blade Design
I bought a spool of Kevlar dial cord for experiments with small mechanisms.
The official recommended crimp splices wouldn't hold,
even when assembled with the official recommended expensive crimping pliers,
even under just finger tension.
And the fibers splintered going over a pulley of the official recommended radius.
I'd do a burn test if I hadn't thrown it away in disgust.
Mike Halloran
Pembroke Pines, FL, USA
RE: Cutting Blade Design