Method and apparatus for adaptive powder fill adjustment on powd

Details Method and apparatus for adaptive powder fill adjustment on powd Method and apparatus for adaptive powder fill adjustment on powd

1992-06-09

1995-12-19

Nelson, Peter A.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Consolidation of powder prior to sintering

419 39, 419 66, 100 45, 100 49, B22F 100

Patent

active

054766311

ABSTRACT:
An automatic adaptive fill cavity adjust system for a powder metal press to control trend variations in the weight of multi-level parts as the result of the flowability and apparent density characteristics of the powder metal. The system comprises a monitoring component to monitor compacting load or tonnage changes, or part weight changes. A computer control is provided to receive the monitor signals, to keep a running average of a small sample of parts, to execute the proper logic to determine when a fill adjustment is needed, and to calculate the new fill position for each moveable platen bearing a tooling member to assure that the percent change in powder column height is the same for all columns. The system further includes a motor drive component responsive to the control computer output to position the up stop of each moveable platen bearing a tooling member and the core rod mechanism (if used), to achieve proportionally correct adjustments to the fill cavity.

REFERENCES:
patent: 4387632 (1983-06-01), Heiberger
patent: 4938673 (1990-07-01), Adrain
patent: 5250255 (1993-10-01), Sagawa et al.
patent: 5275740 (1994-01-01), Spyker et al.

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