Boots – shoes – and leggings
Patent
1993-09-01
1995-09-12
Envall, Jr., Roy N.
Boots, shoes, and leggings
7386253, 364472, 72 31, G06F 1546
Patent
active
054503477
ABSTRACT:
A method for the iterative process optimization of drawing processes, occurring in timed sequence, in drawing presses, in which the clamping force which can be set at the blank holder is reduced (in the case of fractures) or increased (in the case of folding) or maintained at the same level (in the case of acceptable parts) for a subsequent working cycle as a function of the drawn part quality of a drawn part drawn in a proceeding working cycle. In order to be able to detect the drawn part quality with respect to the criteria of fractures, acceptable or folding automatically during each working cycle and, accordingly, to be able to design the optimization process as a genuine control process which occurs automatically in a closed cycle, before the start-up of production of a specific type of a part to be drawn, a pressing stroke-dependent desired value drawing force range of the drawing force exerted on the drawn part during the drawing process is detected and the data are stored, the drawing force needing to stay within this range in order to be able to expect fracture-free and fold-free, that is to say acceptable drawn parts. During production, the pressing-stroke-dependent actual-value drawing force variation is measured and it is monitored whether this variation stays within thaws desired-value drawing force range during the entire drawing path and/or whether it has exceeded (fractures) or undershot (folds) the desired-value drawing force range. Influencing factors which are relevant to the drawing process and can be detected on the semi-finished product are also continuously detected and appropriately taken into account when setting the blank-holding force.
REFERENCES:
patent: 4750131 (1988-06-01), Martinez
patent: 4855923 (1989-08-01), Fullmer
patent: 4939665 (1990-07-01), Gold et al.
patent: 5088333 (1992-02-01), Kiely et al.
patent: 5119311 (1992-06-01), Gold et al.
patent: 5224053 (1993-06-01), Cook
patent: 5311759 (1994-05-01), Mangrulkar et al.
Neff et al., CNC-und DNC-Betrieb bei hydraulischen Pressen, 1986, pp. 947-949.
Bauer et al., Rechnergesteuerter Niederhalterdruck optimiert das Tiefziehen, 1990, pp. 50-54.
Kass Wolfram
Thoms Volker
Brown Thomas E.
Envall Jr. Roy N.
Mercedes-Benz AG
LandOfFree
Method for the automatic, interactive process optimization of dr does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for the automatic, interactive process optimization of dr, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for the automatic, interactive process optimization of dr will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-410655