Metal tools and implements – making – Blank or process – Die
Patent
1992-04-08
1993-09-28
Parker, Roscoe V.
Metal tools and implements, making
Blank or process
Die
76DIG6, 5116571, 36447404, B21K 520
Patent
active
052478610
ABSTRACT:
A method of producing laminated plastic tooling suitable for use in forming sheet material by techniques such as stretch forming, hydroforming, etc. The detailed overall method comprises the steps of designing the desired tool configuration (typically by computer-aided design), machining a suitable tool baseplate, cutting plastic boardstock into suitably sized boards, trial stacking the boards to the general tool configuration, determine that stack has the correct dimensions, unstacking and cleaning the board surfaces, restacking with an adhesive between all abutting boards with clamping as necessary, curing the adhesive, machining the stack to the required configuration under numerical control, sand the shaped tool to the desired surface smoothness, check the tool with a coordinate measuring machine and coat the tool with any desired surface coating, such as an anti-chafe coating. The resulting tool is highly accurate and is capable of long-term production use. The tool can be easily modified if damaged or changes are desired by simply machining away portions to flat surfaces, bonding blocks to those surfaces and repeating the machining and finishing steps.
REFERENCES:
patent: 2679172 (1954-05-01), Clevenger et al.
patent: 5031483 (1991-07-01), Weaver
Gilliam Frank D.
Parker Roscoe V.
Rohr Inc.
Schlesinger Patrick J.
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