This instructable is about cold forming a cup / plate from a sheet of stainless steel.
Because im a Finn, this thingy is related to sauna, but of course it has many other uses too.. candle holder, bird bath or something else.
I use this as a "Spirit of Sauna", when you pour water on it, it slowly drops to the plate under it and spreads all over the stones. Temperature rises slower and you get longer lasting wave of refreshing steam. This is called "creating löyly" ( löyly means heat + moisture ). Opposite to it is "Hitting löyly", wich means throwing loads of water to the stones and enjoy the smell of your burning skin.
Making started when i found a steelplate with a hole, that hole was big enough to be used as a tool in this project.
Pipe works too, specially with thick wall. I was looking for a pipe, but had luck and found that plate. ( metal workshops usually sell cheap or give short leftover pipes. )
Ball headed hammer. ( i used big and small. I don't care about weights, if it feels good, it is. )
Dremel (cutting disc and sanding drum -paper.)
1.5mm thick stainless steel sheet. ( thickness is optional of course )
3mm stainless rod, 3 x 30 cm
Stainless chain 3 x 10 cm
Video tutorial on the last step
Step 1: Beginning..
I had this round plate, with a hole in it.
I shaped a sheet of stainless steel to hexagon. Drawed a circle with compass, with 20mm larger diameter than is the hole on the plate. Then shared the circle to eight parts with compass. Then i cut the shape out using angle grinder.
I started to hammer the sheet from the middle using my bigger ball head hammer.
Starting from the middle, side by side trying to keep every dimple with the same size.
Its better to make many smaller dimples, than couple very deep.
If you start hammering it very hard, you most likely regret it at the end.
I use rather long handles in my hammers, then i change the spot where im holding it to find the spot when its somewhat balanced and bounces up gently. If handle is too short you need to use more power.
Stainless steel work hardens when hammered ( all metals do ), personally i think its a good feature, because then its easier to get smooth surface, when it starts to get hard, you just can't make deep grooves to it.
Step 2: Edges..
After i had got the cup deep enough, i bend four sides to near 90 degree angle.
Hammered the edges on top of my diy anvils "back table".
Tilting just a little and hammering all the way from side to another, then tilting it again, until angle was like i wanted.
Step 3: Shaping..
I shaped little curves between the bends with angle grinder using flap disc.
I drawed the shape using cut off wheel as a template.
Then i smoothened the surface hammering plate against anvil, used my smaller hammer.
Step 4: Finishing...
After all hammering it was time to drill holes..
I made 3mm hole to every corner. Three is for hanging the actual thingy, and three for placing the "bottom plate"
To get nicer look to it i sanded stripes to the edges with dremel, then i heated it little with torch to get pattern more visible.
Finally i did couple small holes to the bottom of the cup, for the water to drop.
Step 5: Hanging...
I used 3mm rod for hanging my "spirit", chains would look better.. But then it wouldn't be so "sturdy", and would swing every time when you hit it with a scoop when adding water to it.
Simple hooks to the ends of the rods with pliers.
Under the cup is a smaller triangular shaped plate, connected with three 10cm long chains.
That is cut with angle grinder and decorated the surface by sanding that same simple pattern to it as before.(great way to hide scratches)
Step 6: Finished..
And finished product...
Video shows the hammering process.
This time its not speed up, so actual idea of making could be seen better.
Thank you for checking this out!