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US 4,075,880 AGranted
Machine for continuously cold working steel bar
AssigneeReinforcing & Allied Industries (Proprietary) Limited
InventorWilliam Raeburn Copeland
Life of this patent
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Abstract
A method and apparatus for cold working steel lengths on a continuous basis so as to impart the cold working properties to the steel. The steel is twisted and immediately untwisted so as to impart torsional force into the steel. Tensile forces are also imparted simultaneously into the steel.
Claims9
A method of cold working an elongated steel length by imparting a torsional force to such length including the steps of:
- feeding the elongated length into a first gripping formation, such gripping formation restraining the steel length from rotating about an axis along its line of feed,
- feeding the elongated length into a second gripping formation,
- causing the second gripping formation to rotate about an axis substantially axially aligned to the line of feed thereto of the elongated steel length,
- continuously feeding the length of steel through the gripping formations thereby causing the second gripping formation to impart continuously the requisite degree of torsion to the steel length, and
- feeding the steel length from the second gripping formation to a third gripping formation downstream of the second formation, such third formation being non-rotatable about the axis of the line of feed and restraining the steel from rotating about an axis along the line of feed thereto of the steel length, such that relative the second and third gripping formations a rotation occurs counter the rotation between the first and second gripping formations such that between the second and third gripping formations a continuous counter torsional force is imparted into the steel length.
2 more elements
Apparatus for imparting a torsional force to an elongated steel length including:
- feed means for the steel length,
- a first gripping formation for receiving steel, such formation acting to restrain rotation of the steel length about an axis along its line of feed,
- a second gripping formation for receiving steel from the first formation, such second formation being rotatable about an axis substantially axially aligned relative to the line of the steel feed, the rotational speed being predetermined relative to the feed speed thereby to impart the requisite degree of torsional force of the steel, and
- a third gripping formation for receiving steel from the second formation, such third formation being non-rotatable about an axis axially aligned relative to the line of steel feed and restraining rotation of the steel length about an axis along its line of feed such that between the second and third formations a torsional force is imparted to the steel counter to the torsional force imparted between the first and second formations.
1 more element
Dependencies are inferred from the claim text.