Dish Press of All steel company- world famous brand

ALLSTEEL AIR DISHED & FLANGED HEADS PROCESS

Dishing press

1Two-step process (first: air dishing, then: flanging a head)2This process requires heads to be dished only with a female die.3The head material may be pre-polished and paper protected before air dishingand the dished area of the head does not need to be re-polished.4Air dished heads do not have internal stresses like spun heads.5These heads do not have distortion problems when holes are cut in them.6Many different sizes of heads can be made from the same female die.7The dished head is trimmed to the required size needed to form the knuckle andstraight flange. (using a flanging machine)8The flanging process will scuff and mark the head on the inside and outside.9This may require the head to be re-polished in these areas if a polished head isrequired.10The knuckle may be formed to meet ASME requirements for knuckle radiusalong with the desired straight flange.11Head thicknesses will vary from 16ga. (0.0595) through 7ga. (0.1874) forcarbon steel & stainless steel material.

12Bumped heads are formed using male and female radius dies.This process forms a small dished area into the head at a time.13Many passes are required over the entire area until a dish is formed to the specifiedradius.14This process is generally used to form thicker heads.This process is not recommended to form thin materials because the dies leave formingmarks (fish scales) in the head material.15After the dishing process the heads must be flanged. (using a flanging machine)16The dishing and flanging process will scuff and mark the head on the inside and outside.17This will require the head to be re-polished if a polished head is required.For thin material the polishing will not remove the forming marks and many timeshighlights them.Head thicknesses will vary from 7ga. (0.1874) to over 1/2 for carbon steel & stainlesssteel material.

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