Method and apparatus for cold finishing of metals
AssigneeLaSalle Steel Company
InventorsSamuel H. Jones, Dick A. Stawarz
Life of this patent
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Abstract
An apparatus and method of cold finishing of metals wherein a metal workpiece having a repeating cross section is advanced between a plurality of pairs of rollers and is driven through a die or cutting tool. The apparatus includes entry vee guides, a gimbaled die or cutting toolholder, special dies, and a special exit guide. The method results in bars having the usual cold finished qualities of accurate size, smooth surface finish, and uniform shape with the added quality of uniform residual stresses.
Claims16
Apparatus for the cold finishing of metals comprising at least one pair of rollers adapted to engage a workpiece of repeating cross-section therebetween, with one of the rollers of said pair being movably mounted and hydraulic means to continuously urge said one roller toward pressure engagement with the other roller of the pair to secure the workpiece therebetween, means for driving at least one of said rollers to advance the workpiece in a forward direction, V-shaped guides to support the workpiece and a cold finishing tool mounted down stream of said pair of rollers adapted to receive the workpiece advanced thereby, said finishing tool being mounted in a gimbaled fashion.
Apparatus for the cold finishing of metals comprising a plurality of pairs of rollers, each pair adapted to grip a workpiece of repeating cross-section therebetween, hydraulic means for driving at least one roller of each pair to advance the workpiece in a forward direction, said hydraulic means including (a) a plurality of hydraulic motor means operatively connected to at least one roller of each pair of rollers to drive that roller, (b) means to supply hydraulic fluid under pressure to each of the hydraulic motor means and (c) flow limiting means to restrict the flow of hydraulic fluid to each of the hydraulic motor means, and a cold finishing tool mounted down stream of the plurality of pairs of rollers adapted to receive the workpiece whereby the source of hydraulic fluid drives the plurality of pairs of rollers to advance the workpiece through the finishing tool such that slippage of one pair of rollers in respect to the workpiece results in a pressure drop across the hydraulic motor means driving that pair of rollers and the flow limiting valve prevents increased flow of hydraulic fluid to the hydraulic motor means to thereby permit an increase in the pressure supplied to the remaining hydraulic motor means and increase the torque thereof.
A method for the cold finishing of metals comprising positioning a metal workpiece of repeating cross section between a plurality of pairs of rollers, each pair adapted to grip the workpiece therebetween and having hydraulic motor means to drive at least one roller of each pair of rollers, supplying hydraulic fluid through a parallel circuit to each of the hydraulic motor means to drive at least one roller of each pair and advance the workpiece in a forward direction while limiting the flow of hydraulic fluid through each of the hydraulic motor means whereby slippage of one pair of rollers results in a pressure drop across the hydraulic motor means driving that pair of rollers and the flow limiting valve prevents the increased flow of hydraulic fluid to that hydraulic motor means to thereby permit an increase in the pressure supplied to the remaining hydraulic motor means and increase the torque thereof, and providing a cold finishing tool down stream of the plurality of pairs of rollers whereby the driving of the rollers by the hydraulic motor means advances the workpiece through the cold finishing tool to cold finish the workpiece.
Dependencies are inferred from the claim text.