Stuff made here has made a pretty in depth video at the trial and error method of press forming. It's "How I made steel toe crocs with wood" if you're interested. He stopped the the material folding over itself by clamping it down really well.

@house-ofhoon

2 жыл бұрын

Cheers mate

I know exactly what this is; we call it "flowering." You need to support the outer edge of the blank with downward pressure or it will take the path of least resistance and begin to wrinkle. In extreme cases these wrinkles can cause blowouts. A more substantial lubricant will also help.

@house-ofhoon

3 ай бұрын

Thanks for your help mate!

When its pressing, the outer edges start to wrinkle up. If the base of the die had a wide flat lip around the edge, and you have a thick steel plate with a hole in the middle, you could clamp the disc down with only the hole for the top die exposed. When pressing, this would draw the material in under more even tension and help prevent the wrinkling on the edges from starting.

@house-ofhoon

2 жыл бұрын

Cheers mate

You need the larger material size (not thickness, area)to resist it wrinkling and collapsing so it stretchs the inner material to the shape. Basically you want the part of least resistance to be the inner metal stretching into the bottom half of the die.

@house-ofhoon

2 жыл бұрын

Cheers mate

You can use soft rubber for the bottom die.

@house-ofhoon

2 жыл бұрын

Yea soft rubber works great. We used that technic at Tickford Racing for a few parts

What capacity press are you using?

@house-ofhoon

Жыл бұрын

It's a 20ton press mate 👍

What infill do you use for the printed pieces?

@house-ofhoon

2 жыл бұрын

90% with a heap of walls. It is 100% solid

I wonder if cutting v shaped reliefs into the outer flange almost up to your outer diameter of the hemisphere would give that wrinkling stress somewhere to go. Unless you NEED a flat flange around the hemisphere?

@house-ofhoon

6 ай бұрын

That's a very interesting idea mate! Cheers!

Shouldn't the top die be less radius per the thickness of material?

@house-ofhoon

2 жыл бұрын

Excellent question!

@IJ-E36

2 жыл бұрын

@@house-ofhoon As discussed in messenger, you need to allow for the thickness of material to prevent the wrinkles...

@OzGecko

2 жыл бұрын

Was thinking the same thing - general rule with pressing things is you need at least one thickness of clearance between tools.

i would try doing a deep drawing die design i would love to see that send me a link if you make one

@house-ofhoon

6 ай бұрын

Thanks for the idea mate! I'll definitely try that when I get time 😁

can you measure the maximum pressure used while pressing?

@house-ofhoon

Жыл бұрын

Unfortunately, my press doesn't have a pressure gauge

@sbb5525

Жыл бұрын

@@house-ofhoon thank you for relpying. Is there a way to somehow feel if you were close to the maximum output?

@sbb5525

Жыл бұрын

@@house-ofhoon what is the maximum output of your press?

@house-ofhoon

Жыл бұрын

My press is 20tons and it was definitely nowhere that. It pressed it relatively easily

@sbb5525

Жыл бұрын

@@house-ofhoon thanks

The outer edges are wrinkled because they need to be shrunk...

@house-ofhoon

Жыл бұрын

Cheers bro

Looks like your making ash trays

@house-ofhoon

2 жыл бұрын

It very well could be! Except I don't smoke haha