Process for the manufacture of compacts in a powder press
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United States of America Patent
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May 1, 2007
Grant Date -
Mar 13, 2003
app pub date -
Aug 22, 2002
filing date -
Aug 31, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process for the manufacture of compacts, particularly cemented-carbide cutting blades, by compressing metallic powder and subsequently sintering the compacts wherein the compacts are formed in a powder press having a die-plate, an upper ram and at least one lower ram which are associated with a die-bore and are adapted to be actuated by a hydraulic press cylinder with the rams having associated thereto force-measuring devices and path-measuring devices to measure the compression forces during the ram feed motion up to the final positions, wherein the value of the energy to be applied by the upper ram is stored for a compact of predetermined geometry and dimensions and a predetermined material, that the overall energy to be applied by the upper and lower rams is further stored as a second value, that the feed motion of the upper ram is completed when the energy applied by the ram has reached the predetermined first value and the feed motion of the lower ram is effected depending on the application of the residual energy and is completed when the overall energy has reached the predetermined second value.
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