Mechanical Flying Shear

Hi troyalec,

Yes,it possible to do so, 31yrs ago (1978) when i was working in a steel mill which we are using mechanical clutch and brake system. Of course need flywheel,shear,proximately sensor ans solenoid valve and mechanical variable speed via varies the drive belt hub opening and closure ratio.But it is 360 deg turn cycle.Every cut must back to original position by mean of control via proximately sensor,solenoid valve and electronic control with counter. In order to match to the steel bar product speed in the conveyer tray.

We are able to cut the steel bar from the size of dia 8mm to 50mm - we have few size of fly shear (By Italy, Daniel company)

How can I get more details about this?

I think you need to be more specific about your application

what is the material? what size is the input material and what size, shape, thickness,etc are you looking for as an output?

When I worked at 3M, we used a machine called a flyknife to cut long rolls of scotchbrite into scrubber pads..but if you are cutting some other type of product, it probably wouldn't work.. they had a number of different technologies for cutting different shapes, but without knowing your materials and sizes.. I can't help.

Chris

We used a similar system, but the product fell through the frame, releasing it.

I have seen purely mechanical tracking tooling like this also. An elegant mechanical solution when appropriate! GA!

Can I get any more information about this?

I have designed and built many of these over the years in the roll forming industry.

We use a multicyl to punch a small notch in the material prior to roll forming, this length between notches is programmed to required finished part length.

The notch matches up with a spring loaded tab in the cut off die which engages and makes the die follow the part, when the die shears the part, the edge of the shear blade disengages the tab which allows the spring loaded die to return to the home position to await next notch.

Great repeatability and has shown to run with little to no maintenance, other then a little oil when it gets dirty.

Of course all designs are different based on application and material.

My material is extruded "green" clay.

I can't punch it and use it to move the cutter.

I can, however, put a wheel on top of it and have it trigger a limit switch.

It's matching the speed without an encoder and drive that has me baffled.

If you design the carrier so that the clay comes against a stop which spreads the load over the full face of the clay, you should be able to use it to trigger a small air cylinder to augment the thrust (lessening the load on the clay, but not completely removing it so that the clay plug drives the process).

This should give enough thump to allow shear and carrier to move together.

At the end of the travel, a slot in the bench below should enable your clay plug to fall out and spring or air can return it for the next cycle.

If the damage to the plug doesn't allow it to be dropped through a slot, then you could rotate the carrier and roll the clay out.

The system we used was for a fairly rigid piece of very thin wall, semi flexible ducting. It was far lighter than your clay plug and could handle a greater compressive load so it could drive the entire process itself.

In this case you will almost certainly need to use the clay to trigger something which will provide almost all the muscle needed.

Have fun with the details (the devil's in the detail, but it is fun)

I too worked in a steel mill that had a number of straitners and each straitner had a flying shear all run mechanicly save for a limit switch that activated a cluch that activated the shear. very accurate repeatability.

oilcan13

hello, where can i get a regular flying shear to cut 8mm to 16mm TMT rebars? a 2 axis $30k shear can be considered by us. Thanks. Gopal

Contact Force Control Industries they have many application with flying shear drives,

cutting everything from glue sticks to 10" steel bar stock.

www.forcecontrol.com