Abstract: A bending machine comprising a feed mechanism and a bending assembly mounted on a base block for bending an elongate workpiece such as a pipe or the like. The feed mechanism includes a member for holding a rear portion of the workpiece, and the bending assembly includes a plurality of dies for bending a forward portion of the workpiece. The disclosed bending machine further comprises a first actuator provided between the bending assembly and the base block for moving the bending assembly on a bending plane, and a second actuator between the feed mechanism and the base block for moving the feed mechanism along a rotational axis of the dies.

Abstract: The invention comprises an improved pipe bender for accommodating multiple pipes of varying diameters and sidewall thicknesses and bending sections of them into an arcuate form without deforming or collapsing the sidewalls of the pipe. The pipe bender comprises a mounting base; an axle supported by the mounting base and having end portions that protrude from respective opposite sides of the mounting base; two sheave blocks having arcuate pipe receiving channels, one such sheave block mounted on each protruding end portion of the axle for rotation about the axis of the axle; first and second pipe engaging mechanisms for engaging and holding pipe; and a device for rotating the sheave blocks about the axis of the axle so that a pipe positioned in a pipe receiving channel is bent into an arcuate form corresponding to that of the respective pipe receiving channel.

Abstract: A pipe bending machine having a support, a bending template, a clamping jaw displaceable relative to the bending template, a clamping member for a pipe, and clamping bodies each provided in a respective one of the bending templates and the clamping jaw and movable relative to one another to an operative position, one of the clamping bodies havign a clamping surface which is provided with different contours for portions of a pipe to be clamped, while the other of the clamping bodies being provided with a clamping surface having only one contour corresponding to the portion of the pipe to be clamped so that the portion of the pipe to be clamped is engaged over its whole surface at the respective side over an angular distance of 180.degree..

Abstract: A pipe bender comprising a base block, a pipe feed mechanism mounted on the base block for feeding a pipe longitudinally thereof, and two pipe bending sections mounted on a common support frame connected to the base block to be reciprocable in directions perpendicular to the pipe. The bending sections each include a fixed die assembly and a clamp die assembly. The clamp die assemblies of the respective pipe bending sections are swingable in opposite directions.

Abstract: An improved consolidated backshoe die is provided for use in a tube bender machine used for bending metal tubing of the type used, for example, in vehicle exhaust systems and the like. The machine includes a bending die having a convexly curved die face for bending engagement with a metal tube supported by a pair of the consolidated backshoe dies mounted on an outwardly pivoting pair of back gates. The bending die is advanced along a line extending between the back gates to engage and bend the metal tube, with the back gates swinging outwardly in opposite directions as the tube is bent. The consolidated backshoe dies are each constructed from a plurality of interlocking backshoe members adapted for partial or complete assembly on the associated back gate, thereby providing a backshoe die of variable length to permit formation of tube bends at closely spaced positions along the metal tube.

Abstract: In a tube bending machine including a bending template having a groove receiving a tube portion to be bent and a clamping jaw cooperating with the bending template to bend the tube portion, the template and the clamping jaw each includes a clamping element with interchangeable clamping faces. Each clamping element has a hydraulic drive incorporated in the template and the clamping jaw, respectively.

Abstract: A pipe bending machine comprises a longitudinally extending machine frame having an upper side, a feeding carriage movable at an upper side of the machine frame and carrying device for clamping a pipe, a bending head provided on one end of the machine frame and rotatable about a vertical axis, a bending template mounted on the bending head and formed as a multi-level template having a plurality of bending grooves provided with different bending diameters and arranged at different levels, a device cooperating with the bending template for bending a pipe therebetween, the bending template and the displacing carriage with the clamping sleeve being movable relative to one another in a vertical direction and transversely to a longitudinal direction of the machine frame for using one or another of the bending grooves, the bending template being liftable and lowerable in the vertical direction for exchanging the bending grooves, while the feeding carriage being moved transversely in the longitudinal direction of the

Abstract: A bending template assembly is attached to a main shaft mounted in an elongated bed and is provided with a plurality of bending templates put in layers in the axial direction of the main shaft. A long work is held, at the rear end thereof, in a chuck mounted on a carriage for work slidable in the longitudinal direction of the work. The chuck is movable transversely to the work, i.e., horizontally and vertically and the work can be located against the outer periphery of desired one of the plural bending templates by the horizontal and vertical displacement of the chuck. A fastening apparatus provided with fastening pieces of the number equal to that of the bending templates is disposed on a bending arm mounted on the main shaft at one end thereof. This fastening apparatus is not only rotatable together with the bending arm but also movable horizontally and vertically relative to the bending arm and can be approached or retreated from the bending template assembly.

Abstract: A tube bending machine comprises a bending table carrying a bending template and a clamping jaw for receiving a tube to be bent therebetween. The template and the clamping jaw are each formed with a recess to receive various clamping members. Each clamping member is movable into and away from the recess in the template or the clamping jaw so that different clamping members having different clamping surfaces are positioned against each other to clamp a tube being bent.

Abstract: A mobile pipe bending carriage, for storing and transporting bending equipment used in making radius bends in pipe, conduit, tubing and the like, having a mobile carriage structure with:(1) mounting attachment means for mounting thereon any one of various makes of conventional three-point bending frame assemblies, in a stationary, vertical, operating position;(2) rack means for storing different sized bending shoes;(3) swivel-type casters for mobility;(4) leveling means for stability during bending operations;(5) cradle means for mounting a hydraulic pump, an electric motor and a locker for the storage of small tools and accessories used in bending operations;(6) a detachable leveling clamp, used with the bending frame assembly, for accurately gauging and aligning the bending of pipe, conduit, tubing and the like.

Abstract: There is disclosed a pipe bending machine comprising a movable clamping unit for holding a pipe to be bent and feeding the pipe along a feed path. A slidable guide rail extends in the longitudinal direction of the feed path to guide the pipe. Bending of the pipe is carried out at a pivotable bending table, which carries a template provided, at two opposite sides thereof and in a single plane, with two curved bending surfaces of different radii. Clamping devices are present for clamping the pipe to either one of the surfaces. A displacing device is provided to displace the template in a horizontal plane and relative to the guide rail to compensate for any eccentricity of the center of curvature of either or each of the surfaces with respect to the pivot axis.

Abstract: A rotary draw bending machine employs a stack of bending dies 22 of different curvatures, forming part of a bend head 18 that is entirely mounted on the forward end of the machine bed 10 for bi-directional lateral and vertical motion so that without changing the position of the centerline of the pipe 16 to be bent, it may be formed by bend dies of different curvature. The entire bend head 18 is shiftable laterally to enable the bend dies to clear the pipe 16 as the dies move vertically to position another die. A single pressure die 20, which is mounted on the movable bend head 18, is mounted for vertical movement relative to the bend head so that it can be positioned in alignment with the pipe.

Abstract: A pipe-bending machine has a bending table rotatable about an axis of rotation, a bending form having two opposite curved sections each defining a center of curvature, an oblong hole connecting the two centers of curvature, a retaining bolt coaxial with the axis of rotation of the table and projecting above the upper surface of the latter to engage the oblong hole, and means for shifting the bending form from one working position in which one center of curvature coincides with the axis of rotation of the table into another working position in which the other center of curvature coincides with the axis of rotation, and means for arresting the bending form in its selected working position.

Abstract: A tube bending machine comprises a bending table mounted on a support turnable about an axis and coaxially carrying an inner bending template surrounded by at least one outer bending template which is shiftable along said axis relative to the inner bending template so that a portion of the tube to be bent may be pressed by clamping means carried by the bending template against the outer surface of the inner or the outer bending template. The bending machine comprises further guide means including a releasable collet for guiding the tube toward the bending templates, the guide means being mounted on the support movable in longitudinal direction of the tube to be bent and in a direction transverse to the longitudinal direction.

Abstract: This invention relates to a novel tubing bender characterized by a horizontal bed atop which is mounted a template and a fixed block mounting a hollow tubular slide member for non-rotatable longitudinal slidable movement. The tube, in turn, mounts a longitudinally adjustable combination stop and slide support mechanism which selectively engages notches in the template to maintain the tube in longitudinally adjusted position relative to the block. A bending head is mounted on the end of the tubular member for rotatable adjustment relative thereto. The tube is slotted longitudinally both top and bottom to house internally an externally actuated vise mechanism that remains fixed relative to the block atop which it is mounted while the tube and bending head move as a unit longitudinally thereof.

Abstract: A tube bending machine including a frame with a bed at one end pivotally supporting a horizontally swingable bending table bearing tube bending and clamping mechanism, including a jaw for clamping tube stock against a tube bend forming and clamping die secured coaxially at the table pivotal connection; a tube feed carriage with a rotatable tube-clamping collet for a tube to be fed to, clamped and bent at the die, the tube carriage being guided on the bed to shift to and from the said die, and free to advance during a bending operation by powered swing of the table; the die periphery having a partially circumferentially extending tube-forming groove concentric to and with groove centerline in a plane perpendicular to the pivot axis; the die and jaw each being turnable relative to the table selectably to present to each other cooperating straight grooves or cooperating curved grooves for clamping straight or curved length portions of tube to be bent, including also clamping grooves curving out of the plane of t

Abstract: An electric driven portable conduit bender provided with a bending shoe which is rotatably mounted on a horizontal axis and including a roller support unit mounted on the bender frame and retained with a quick-release pin. The rollers in the roller support unit are rotated to match the size of conduit.