Method and apparatus for the bending of workpieces
AssigneeFeintool International Holding AG
InventorJohannes Haack
Life of this patent
Estimating the term…
Abstract
In a method for the bending of workpieces by swivel bending jaws, the bent-off part is to assume a predetermined bending angle with respect to the workpiece, for this purpose, in a first bending operation, at least one corresponding leg is to be bent off from the workpiece by means of the swivel bending jaws. Then, the swivel bending jaws are released from the leg and a springback of the leg or the actual bending angle is determined by direct measurements and compared with a set bending angle. Subsequently, an agreement is established between set bending angle and actual bending angle by a renewed bending operation, by a bending-over.
Claims28
Apparatus for bending a workpiece by swivel bending jaws wherein the bent portion assumes a predetermined bending angle with respect to the workpiece, which comprises:
- a bending anvil;
- a bending punch spaced from the bending anvil and movable towards and away from the bending anvil;
- at least one swivel bending jaw associated with the bending anvil and movable in the direction of the bending punch;
- wherein the bending anvil, bending punch and swivel jaw are adapted to hold a workpiece between the bending anvil on the one hand and bending punch and swivel jaw on the other hand and wherein the swivel jaw is adapted to bend at least one first leg of the workpiece in the direction of the bending punch;
- and means in the bending punch for determining the actual bending angle of the bent leg by direct measurement of the distance between the bending punch and the bent leg of the workpiece.
Apparatus for bending a workpiece by swivel bending jaws wherein the bent portion assumes a predetermined bending angle with respect to the workpiece, which comprises:
- a bending anvil;
- a bending punch spaced from the bending anvil and movable towards and away from the bending anvil;
- at least one swivel bending jaw associated with the bending anvil and movable in the direction of the bending punch;
- wherein the bending anvil, bending punch and swivel jaw are adapted to hold a workpiece between the bending anvil on the one hand and bending punch and swivel jaw on the other hand and wherein the swivel jaw is adapted to bend at least one first leg of the workpiece in the direction of the bending punch;
- and means in the bending punch for determining the actual bending angle of the bent leg by direct measurement of the distance between the bending punch and the bent leg of the workpiece, said means including a measuring pin which can be led against the bent leg of the workpiece and a measuring probe for detecting the movement of the measuring pin;
- and an angle lever having two legs, said angle lever pivoting about an axis arranged between the measuring pin and measuring probe, wherein a first lever leg acts on the measuring probe and a second lever leg is acted upon by the measuring pin.
Apparatus for bending a workpiece by swivel bending jaws wherein the bent portion assumes a predetermined bending angle with respect to the workpiece, which comprises:
- a bending anvil;
- a bending punch spaced from the bending anvil and movable towards and away from the bending anvil;
- at least one swivel bending jaw associated with the bending anvil and movable in the direction of the bending punch;
- wherein the bending anvil, bending punch and swivel jaw are adapted to hold a workpiece between the bending anvil on the one hand and bending punch and swivel jaw on the other hand and wherein the swivel jaw is adapted to bend at least one first leg of the workpiece in the direction of the bending punch;
- and means in the bending punch for determining the actual bending angle of the bent leg by direct measurement of the distance between the bending punch and the bent leg of the workpiece;
- a drive for the at least one swivel bending jaw consisting of an electrohydraulic torque amplifier.
Apparatus for bending a workpiece by swivel bending jaws wherein the bent portion assumes a predetermined bending angle with respect to the workpiece, which comprises:
- a bending anvil;
- a bending punch spaced from the bending anvil and movable towards and away from the bending anvil;
- at least one swivel bending jaw associated with the bending anvil and movable in the direction of the bending punch;
- wherein the bending anvil, bending punch and swivel jaw are adapted to hold a workpiece between the bending anvil on the one hand and bending punch and swivel jaw on the other hand and wherein the swivel jaw is adapted to bend at least one first leg of the workpiece in the direction of the bending punch;
- and means in the bending punch for determining the actual bending angle of the bent leg by direction measurement of the distance between the bending punch and the bent leg of the workpiece;
- wherein the swivel bending jaw swivels about an axis, a stub shaft in the line of the axis and including a drive for the swivel bending jaw about said axis consisting of an electrohydraulic linear amplifier connected to the stub shaft.
Apparatus for bending a workpiece by swivel bending jaws wherein the bent portion assumes a predetermined bending angle with respect to the workpiece, which comprises:
- a bending anvil;
- a bending punch spaced from the bending anvil and movable towards and away from the bending anvil;
- at least one swivel bending jaw associated with the bending anvil and movable in the direction of the bending punch;
- wherein the bending anvil, bending punch and swivel jaw are adapted to hold a workpiece between the bending anvil on the one hand and bending punch and swivel jaw on the other hand and wherein the swivel jaw is adapted to bend at least one first leg of the workpiece in the direction of the bending punch;
- and means in the bending punch for determining the actual bending angle of the bent leg by direction measuring of the distance between the bending punch and the bent leg of the workpiece;
- wherein the swivel bending jaw has a jaw body, an electrohydraulic linear amplifier acting directly on the jaw body, a piston rod of the electrohydraulic linear amplifier connected to the jaw body and a cylinder mounted in a swiveling manner on a swivel bearing.
Apparatus for bending a workpiece by swivel bending jaws wherein the bent portion assumes a predetermined bending angle with respect to the workpiece, which comprises:
- a bending anvil;
- a bending punch spaced from the bending anvil and movable towards and away from the bending anvil;
- at least one swivel bending jaw associated with the bending anvil and movable in the direction of the bending punch;
- wherein the bending anvil, bending punch and swivel jaw are adapted to hold a workpiece between the bending anvil on the hand and bending punch and swivel jaw on the other hand and wherein the swivel jaw is adapted to bend at least one first leg of the workpiece in the direction of the bending punch;
- and means in the bending punch for determining the actual bending angle of the bent leg by direct measurement of the distance between the bending punch and the bent leg of the workpiece;
- a bending ram associated with the bending anvil for bending of a further section of the workpiece.
Apparatus for bending a workpiece by swivel bending jaws wherein the bent portion assumes a predetermined bending angle with respect to the workpiece, which comprises:
- a bending anvil;
- a bending punch spaced from the bending anvil and movable towards and away from the bending anvil;
- at least one swivel bending jaw associated with the bending anvil and movable in the direction of the bending punch;
- wherein the bending anvil, bending punch and swivel jaw are adapted to hold a workpiece between the bending anvil on the one hand and bending punch and swivel jaw on the other hand and wherein the swivel jaw is adapted to bend at least one first leg of the workpiece in the direction of the bending punch;
- and means in the bending punch for determining the actual bending angle of the bent leg by direction measurement of the distance between the bending punch and the bent leg of the workpiece;
- including at least one positioning punch engaging the workpiece, wherein the bending anvil is passed through by said positioning punch whereby the positioning of the workpiece is achieved.
Dependencies are inferred from the claim text.