Caterpillar-traction drawing machine and drawing method
AssigneeSMS group GmbH Sitz Duesseldorf
InventorsThomas CMIEL, Joerg LINDBUECHL, Dirk HESSBERGER
Life of this patent
Estimating the term…
Abstract
A caterpillar-traction drawing machine and a method for drawing of elongated workpieces can be provided with at least one drawing tool fastened pivotally on a tool holder and/or with at least two identical drawing recesses, which can be brought selectively into a drawing position, so that the influence of any fatigue phenomena at may exist is minimized. For the same reason, a caterpillar-traction drawing machine is advantageous in which the two chains of the caterpillar-traction unit are block chains and are respectively braced via an idler roller chain including idler rollers on respectively one pressing beam.
Claims18
A caterpillar-traction drawing machine for drawing of an elongated workpiece in a drawing direction along a drawing line comprising:
- (a) a drawing die;
- and
- (b) a caterpillar-traction unit disposed in the drawing direction down-line from the drawing die;
- wherein the caterpillar-traction unit comprises:
- at least first and second revolving chains having at least first and second tool holders, respectively, carrying first and second drawing tools, respectively, in first and second drawing positions, respectively;
- a press for application of a pressing force on the first and second drawing tools with a component of the pressing force directed toward the drawing line;
- and
- (c) a gripping region;
- wherein the first and second drawing tools are provided with at least first and second drawing recesses, respectively, in the first and second drawing positions, respectively, in the gripping region and rest with the first and second drawing recesses, respectively, on the workpiece and by the press are pressed against the workpiece;
- and
- wherein at least the first tool is fastened pivotally on the first tool holder or has at least two identical first drawing recesses selectively able to be brought into the first drawing position.
A drawing method for drawing an elongated workpiece in a drawing direction along a drawing line through a drawing die, the method comprising:
- (a) disposing a caterpillar-traction unit down-line in the drawing direction from the drawing die, wherein the caterpillar-traction unit comprises at least first and second revolving chains having at least first and second tool holders, respectively, carrying first and second drawing tools, respectively, in first and second drawing positions, respectively;
- and
- (b) disposing and revolving the first and second revolving chains so that the first and second drawing tools come into contact in the first and second drawing positions with a drawing recess on the workpiece and are pressed against the workpiece to apply traction forces on the workpiece;
- wherein after or during drawing of the workpiece when the first and second drawing tools are not being pressed against the workpiece, at least the first drawing tool remains pivoted on the first tool holder or at least one further identical first drawing recess of the first drawing tool is brought into the first drawing position.
A caterpillar-traction drawing machine for drawing of an elongated workpiece in a drawing direction along a drawing line comprising:
- (a) a drawing die;
- and
- (b) a caterpillar-traction unit disposed in the drawing direction down-line from the drawing die;
- wherein the caterpillar-traction unit comprises:
- at least first and second revolving chains having at least first and second tool holders, respectively, carrying first and second drawing tools, respectively, in first and second drawing positions, respectively;
- a press for application of a pressing force on the first and second drawing tools with a component of the pressing force directed toward the drawing line;
- and
- (c) a gripping region;
- wherein the first and second drawing tools are provided with at least first and second drawing recesses, respectively, in the first and second drawing positions, respectively, in the gripping region and rest with the first and second drawing recesses, respectively, on the workpiece and by the press are pressed against the workpiece;
- and
- wherein the first and second chains are block chains and are braced via first and second idler roller chains, respectively comprising idler rollers on first and second pressing beams, respectively.
Dependencies are inferred from the claim text.