Metal deforming – By plural tool-couples
Patent
1977-04-11
1978-03-21
Lanham, C.W.
Metal deforming
By plural tool-couples
7245302, 7245306, 7245307, 7245308, 72455, 83619, 100231, 100269B, B21J 912
Patent
active
040796175
ABSTRACT:
A pneumatic metal forming press which employs at least one pneumatic drive unit which has an expansion chamber defined by a flexible diaphragm acting on a support mechanism and a shock absorber underlying the support mechanism to absorb the impact thereof following the release of a working tool such as a punch after penetration of a work piece during a working stroke. The drive unit may incorporate a plurality of diaphragm chambers arranged one above the other and connected in parallel to a source of high pressure air. The drive unit may also incorporate a pressure multiplier having a fluid chamber pressurized in response to movement of the diaphragm of a drive mechanism and an output drive shaft driven in response to pressure thereto by the fluid in the multiplier chamber. The drive mechanism may also incorporate a secondary drive mechanism operable to locate the working tool closely adjacent a work piece prior to commencement of the working stroke so that although the press may have a short working stroke, it has the ability to open and close over a substantial operating stroke.
REFERENCES:
patent: 1007349 (1911-10-01), Gerdau
patent: 1054194 (1913-02-01), Gerdau
patent: 1230486 (1917-06-01), Jacomini
patent: 2482280 (1949-09-01), Lerma
patent: 2677426 (1954-05-01), Glitsch
patent: 3213739 (1965-10-01), Zingone
patent: 3253493 (1966-05-01), Weisbeck
Crosby Gene P.
Lanham C.W.
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