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Flared or Trunicated Cones for Elevated Water Tanks. Specifically Sphere and Water Spheroids
hjnwt - Sunday, November 15, 2009 - 9:05pmFabrication cones | flared | trunicated
Hello All. I am new to the group. I am looking for help in die design. My work involves fabricating elevated water tanks. We press or dish our elliptical heads involving segemented pie shaped plates. We use the typical male over female die configuration checking both raduis with radius boards as the piece is pressed.
Now to the problem. We have a Water Spheroid to fabricate that includes a flared or trunicated cone between the top of the cylinderical stem (support shaft)and the bottom of the spheroid tank itself.
The cone will be 10' diameter at its bottom and 15' diameter at it's top. The height of the cone will be 5'. The material is Mild Carbon A-36 and is 1.25" thick.
I just can't seem to get a three way die in my mind. I have used compound (two way) for decades. I have thought about rolling the pieces (blanks) to a larger than required radius and then press the curved pieces with a male die on bottom that would be retangular in shape and a female die on top to press the required radius at the bottom and opening the limit switch on the press to allow the die to form the curve to a larger diameter as I go.
I am hoping someone will reply and tell me what I am missing. I am not very confident in my idea. I appreciate any thoughts anyone has or any reference books for forming flared or trunicated cones.