Abstract: The invention relates to a bending machine (1) for bending sheet metal workpieces (2), for example a press brake or a folding machine, comprising at least one tool carrier (3), wherein a plurality of tool parts (5) that can be moved along a horizontal tool receptacle (4) are arranged on at least one tool carrier (3), at least one adjusting device (6) for moving the tool parts (5), and coupling devices (14) associated with the tool parts (5), each for connecting a respective tool part (5) to the adjusting device (6). Furthermore, according to the invention the adjusting device (6) may comprise a threaded spindle (7) extending parallel to the tool receptacle (4) and each coupling device (14) may comprise a spindle nut segment (15), wherein the spindle nut segment (15) can be coupled to the tool part (5) or to the threaded spindle (7).

Abstract: A device for bending sheet material comprises a receiving plate and a forming plate defining or connectable to one another so as to define therebetween a receiving slot of fixed dimensions. A bending plate is pivotally connected to the receiving plate. The bending plate has an upper surface substantially in a common plane with an upper surface of the receiving plate. The forming plate comprises a first side surface extending along an open end of the receiving slot and forming a first acute angle with a first major surface of the forming plate. The bending plate has a range of pivotal motion of greater than 90°.

Abstract: The present invention provides a bending die in which the fixed die 1 and the rotary die 2 are surface contacted to each other, the rotary die 2 is rotated rearward after press forming to cause the workpiece 3 to be moved away from the die, wherein the contact surface 9 between the fixed die 1 and the rotary die 2 is formed in a flat surface. In addition, the present invention is set such that the rotary center point P of the rotary die 2 is set outside the line 10 drawn from one end C1 of the linear line indicating the contact surface 9 of the rotary die 2 in a direction of right angle in respect to the linear line when the contact surface 9 is seen in a section of a direction perpendicular to the axis of the rotary die 2. With such an arrangement as above, a machining of the contact surface 9 can be facilitated more and under a lower cost than those as compared with those forming the arcuate surface as found in the prior art.

Abstract: Conventional sheet bending brakes are modified to provide a platform which is easy to assemble or disassemble and which is positioned at the top of the brake for ease of working the sheet material comprising platform brackets which are secured to the upper arm of the C-shaped bracket of the brake forming a substantially level support surface essentially transverse to the longitudinal axis of the brake and the platform positioned thereon.

Abstract: Apparatus for bending a lithographic plate having an image thereon, comprising an inspection system for (a) inspecting a plate held on a table at an inspection station, (b) determining the extent to which the plate needs to be adjusted relative to a predetermined reference position, and (c) generating a signal indicative of any such adjustment. A first positioning mechanism responsive to the signal automatically moves the table to position a plate on the table for a bending operation.

Abstract: Method of and apparatus for punching and bending a lithographic plate to match a particular press so that when the plate is subsequently mounted on that particular press, it is oriented to print a properly positioned image on a print surface.

Abstract: An apparatus for bending hollow profile strips (1) into spacer frames for insulating glass planes includes a clamp for the hollow profile strip, which clamp can be brought into contact with the lateral surfaces of the hollow profile strip (1), an abutment (20), about which the hollow profile strip (1) is bent, and a pivotable bending lever (50). The abutment (20) is exchangeably attached to a support (21) and can be moved into and out of its operative position by pivoting the support (21) about an axis perpendicular to the plane of symmetry of the clamp (2) and by shifting the support (21) perpendicularly to the plane of symmetry of the clamp (2).

Abstract: A printing plate end bending apparatus utilizes a machine table having a printing plate abutment surface together with plate leading and trailing end support saddles which each also have plate end abutment surfaces. Each plate end saddle is provided with pivotable side plates that carry plate end hold-down members and bending beams.

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.

Abstract: Bending device for offset printing plates having a support plate formed with a head portion, a respective bending bar pivotally mounted at opposite ends of the head portion for bending respective ends of a printing plate disposed on the head portion, a lowerable down-holder member for holding a printing plate down against the head portion, and a positioning device for bending the printing-plate ends in-register to given printing-plate dimensions, includes adjusting means disposed parallel to the support plate between the opposite ends of the support-plate head portion, the adjusting means being movable into a plane wherein a printing plate is disposed on the head portion, so as to deflect at least part of the printing plate out of the plane.

Abstract: An angle indicator for use with hand operated sheet metal brakes having a bed (A), a beam (B), an apron (C), a hinge rod (G) disposed substantially colinear with a desired bend line (D) to be formed in a worksheet (E), an apron mounted hinge rod receiving arm (I) and a bed mounted hinge rod receiving arm (H), the angle indicator including a gauge face (12) operably affixed to the apron mounted hinge rod receiving arm (I) and having a plurality of guidelines (22) and angular indicia (23) formed on the face thereof and an angle indicator arm (11) operably affixed to the bed mounted hinge rod receiving arm (H), which angle indicator arm (11) may be compared with the relative position of the gauge face (12) such that the angular position of the apron (C) with respect to the bed (A) can be read directly from the gauge face (12).

Abstract: An automatic sheet metal folding machine comprises two gripping members and upper and lower folding members disposed respectively above and below the gripping members. The folding members are pivotally mounted about pivot axes generally fixed during folding operations. The gripping members are adapted to clamp the sheet of metal therebetween and bring the sheet of metal to an upper or lower horizontal reference plane for folding, or some position therebetween. The upper folding member folds sheet metal downwardly and the lower folding member folds sheet metal upwardly, thereby avoiding having to turn over the sheet of metal. An orientation table may be associated with the actual folding machine for turning around a sheet of metal between successive folding operations and/or feeding and discharging the sheet of metal into and out of the folding machine.

Abstract: A sheet bending brake comprising a plurality of C-shaped frame members that support a first member. The first member has a clamping surface. A second member is hinged to the first member and has a bending surface. A plurality of bars are pivoted to the frame members and support an anvil member that extends longitudinally of the first member. A cam support shaft is rotatably mounted on the frame members and a plurality of eccentric cams are secured on the shaft. Each bar is generally C-shaped and a cam is positioned between the upper and lower flanges thereof. A handle is secured to the shaft such that when the handle is operated, the eccentric cams are rotated to move the bars and, in turn, the anvil member into and out of clamping position. The shaft and eccentric cams are provided with circumferentially spaced teeth extending axially so that the cams are locked in any adjusted position.

Abstract: Forming press for making perimetral bends on metal sheets or plates comprising a support structure having a C-shaped cross section with horizontal arms, a fixed lower counterblade, and an upper blank counterblade, movable in a vertical direction, a cutter block carriage, movably guided in the vertical direction between the arms of said support structure, an upper bending blade and a lower bending blade mounted on said cutter block carriage and having respective active parts cooperating with said counterblades for the downward and upward bending of the edge of a plate firmly held by the counterblades. In order to prevent the surfaces of the plates, when particularly treated, e.g.

Abstract: Forming press for making perimetral bends on metal sheets or plates comprising a support structure having a C-shaped cross section with horizontal arms, a fixed lower counterblade, and an upper blank counterblade, movable in a vertical direction, a cutter block carriage, movably guided in the vertical direction between the arms of said support structure, an upper bending blade and a lower bending blade mounted on said cutter block carriage and having respective active parts cooperating with said counterblades for the downward and upward bending of the edge of a plate firmly held by the counterblades.In order to prevent the surfaces of the plates, when particularly treated, e.g.

Abstract: A combined sheet bending brake, table and coil support. The sheet bending brake includes a base, a first bending member having a clamping surface mounted on the base and a second bending member having a bending surface hinged to the first member, an anvil member extending longitudinally of the first bending member which clamps a workpiece by applying pressure to the anvil member to clamp the workpiece on the clamping surface of the first member. The table is mounted on the sheet bending brake, and extends horizontally and rearwardly of the brake along the base. The coil support comprises a base, a pair of supports carried by the base, which include a plurality of rollers for supporting a roll of sheet stock, and clamping surface on which the edge of the uncoiled sheet stock is clamped. The coil stand is mounted on the base of the sheet bending brake such that the axis of the roll of sheet stock extends transversely of the longitudinal axis of the sheet bending brake.

Abstract: For bending strip material into toothed shape, the strip is introduced once into a pair of toothed jaws and a bending member is moved from one end position to another to bend the strip about one end tooth, one end flank of which is exposed. The strip is removed and then similarly bent about another end tooth, in a preferably mirror-image arranged part of the apparatus, in an opposite bending direction, thereby to form a tooth in the strip. The bending steps are repeated as often as necessary.The invention is particularly applicable to the forming of a toothed band from a plane sheet metal strip.

Abstract: A bending machine for forming offset printing plates and conversion components for converting older model plate benders into bending machines capable of forming reverse bend plates. The plate bender includes a table support for the plate to be bent. The table is provided with edges having contours identical to the desired contours of the edges of the plate after bending. At least one of the end edges is provided with a die having a reverse bend component formed in it. The bend on one end of the plate may be formed in a conventional manner, while the reverse end bend of the plate is formed in a two-bend sequence by suitable structural components which in themselves may form a conversion system for older plate benders.

Abstract: A cleat-former machine, of the type which utilizes two rotating wipers, permits removal of formed cleats sideward from either end of the bending blade, and can be used with workpieces whose length exceeds that of the wipers. L-shaped side plates, which support between them a bending blade and a wiper arm mechanism adjacent the aft bending edge of the bending blade, have cutouts provided in their upper edges in registration with the ends of the bending edge. A rocker-arm clamping assembly, rotatably mounted on a shaft above and aft of the bending blade, is rotated to clamp and unclamp a sheet metal workpiece relative to the blade by a tilt lever outward of the side plate, aft of the cutout, at their level, and operated off the aft side of a circular cam supported outward of said side plate and rotated by the gear train. Side access to the ends of the blade bending edge is thereby provided. In the method of the present invention, especially useful in fabricating L-shaped duct workpieces, 180.degree.

Abstract: A bending fixture for offset plates provided with positioning holes, the bending fixture including a platform having bending bars pivotally mounted at opposite ends thereof and plate hold-down members coacting therewith, where the hold-down members are raised away from and lowered toward the platform during their operation. The bending bars swing upward above the platform with one of the bars being provided with retractable positioning pins arranged along the one bar. Each hold-down member includes an edge surface to provide an abutment for the bent over edge of the plate in order to back up its associated bending bar.

Abstract: A semi-automatic sheet metal forming machine for forming light gauge metal having a bed formed of a plurality of adjustable and interchangeable spaced spacer plates of various widths, a forming bar having a plurality of removable and interchangeable forming fingers of various widths, and a clamping bar including a plurality of removable slidably mounted clamping fingers of various widths, the clamping bar and forming bar being hydraulically operated and synchronized for semi-automatic repeated forming operations. By adjusting and utilizing different width combinations of the clamping and forming fingers and spacer plates, an operator can perform almost any desired sheet metal forming operation which heretofore would have required separate and expensive special dies.

Abstract: The invention provides a tool particularly adapted for working metal. The tool comprises an electromagnetic coil, a pole adapted to be magnetized by the coil, and a work surface pivotable with respect to the pole and operative in use to apply bending force to a work piece held to the pole by magnetic force.Keepers may be provided to be attracted to the pole to hold the work piece. A keeper may be fitted with a cutting blade or punch.The work surface may be part of a body which, when moved from a rest position, causes the coil to be energized and which is urged by magnetic force back to that rest position to de-energize the coil.The body is preferably connected to the pole by a hinge which does not project above a plane so as in no way to hinder metal bending.A tool may magnetically clamp itself to a bench.The tool may have an electrical circuit capable of producing DC for magnetic holding or AC so that the tool may be used as a demagnetizer.

Abstract: A bending brake for sheet metal employs a long, upwardly facing fixed clamping surface supported on a base, and a long bending arm hinged to one edge of the clamping surface. An upper clamping surface is supported for movement toward and away from the fixed clamping surface at the first ends of a number of arms which extend normally to the clamping surface and are pivotably supported near their opposite ends for rocking motion about the base. Actuating means taking the form of a cam mechanism or fluid cylinder acts between the far ends of the arms and the base to bring the movable clamping surface into and out of engagement with the fixed clamping surface.

Abstract: Apparatus for making folds or bends of adjustable length in sheet metal. The apparatus includes a retractable chain-like die which can be shortened or lengthened so as to adjust the operative length of the die.

Abstract: To bend sheet metal through a wide angle into an acute angle, this bending brake has a foundation carrying a stationary workpiece-clamping structure including multiple J-shaped stationary workpiece-clamping jaw supports disposed in spaced parallel relationship and carrying an elongated stationary workpiece-clamping jaw. The upper portion of each such support terminates in a U-shaped cam thrust abutment engaged by an eccentric movable-jaw-operating cam operatively secured to a common composite cam shaft journaled in multiple movable workpiece-clamping jaw arms with downwardly-curved rearward end portions pivotally mounted at their rearward ends upon pivot bolts carried by the upwardly-curved rearward end portions of the stationary supports.

Abstract: The method of fabricating the sheet metal duct units of the present invention comprises cutting a plurality of spaced lines of notches in an elongated strip of sheet metal, each of the lines being transverse to the longitudinal axis of the strip. The strip is sheared at predetermined points along the length thereof so that the cutting and the shearing operation combine to form sheet metal segments each having at least one cleat tab on at least one end thereof. Next the sheet metal segments are bent along at least one axis extending longitudinally with respect to the longitudinal axis of the sheet metal so as to form an upstanding leg, the cleat tab being on one end of the upstanding leg. The cleat tab is then bent back against the remainder of the upstanding leg so as to form a cleat.