Shear attachment for workshop hydraulic press?

[ELL]

Do these exist? If you can get punches and dies, why not a shear you can use for flat bar in a press? Thanks.

 

[Other Daniel]

Possibly would be far too slow to be of any practical use

 

[dave h 2]

They exist for cutting pavers and rock slabs.

 

[ELL]

Possibly would be far too slow to be of any practical use

Not for my use. I would only be cutting one or 2 pieces a day max.

 

[ELL]

They exist for cutting pavers and rock slabs.

Not sure they would work on steel flat bar.

 

[dave h 2]

Exactly, only seen one for cropping Dexion angle

 

[hotponyshoes]

I've got one for sheet metal (photos on hear somewhere?)

I don't see any reason why a bar cropper couldn't be fitted/made to work although, as mentioned above, it would be a bit slow compared to a normal bar cropper so you might get bored of it quickly?

 

[roofman]

Not for my use. I would only be cutting one or 2 pieces a day max.

I think he means the cutting action, a shear works by zipping through the metal at a fair pace, i bet it would just stretch the metal before the cut and be of no quality..intresting idea and i would like to be proved wrong all the same

 

[hotponyshoes]

I think he means the cutting action, a shear works by zipping through the metal at a fair pace, i bet it would just stretch the metal before the cut and be of no quality..intresting idea and i would like to be proved wrong all the same

I don't know if the slow speed of cut would actually be a problem?
With a hand bar cropper you just build up pressure on the leaver and eventually it just goes.
It goes at a fair rate when it does go but I'd think that's just because you have exceeded the yield point of the material.

If you watched it in slow motion I expect it would be cutting through gradually like scissors (although when you look at a cut end it looks like part cuts then the rest just snaps?)

Either way, the cut won't start until there is enough pressure to overcome the metal yield. Maybe the ram will not follow down quickly enough to crop all the way but as long as you have some sort of clamp so it can't move I'd think it will cut fairly clean eventually?

 

[hotponyshoes]

Hydraulic (and others) powered bar croppers are readily available anyway.
Why not just copy the design from one of those and replace the ram with a shaft that intersects with your press ram?

 

[Dapph2]

Not for my use. I would only be cutting one or 2 pieces a day max.

Have you got a fly press ? Could you adapt a pair of shear blades to fit it ?

Though I thing using a thin stainless steel slitting blade on a 4 inch angle grinder will like as not be easier quicker safer & much cheaper .

 

[Dapph2]

Not sure they would work on steel flat bar.

I've seen some massive shears for all sorts of profiles some for 3 inch square bars

 

[frank horton]

I always wanted a "Metal Worker" shear/punch....
My first one, seen and used when I was in S Africa....
Dont really need one at the mo but would like one anyway.....

 

[roofman]

I always wanted a "Metal Worker" shear/punch....
My first one, seen and used when I was in S Africa....
Dont really need one at the mo but would like one anyway.....

yea me too, those machines are so versitile and far better than my skill set, would love to own one.