Disclosed is a tube bending device which includes at least one bending roller mounted to be rotatably movable relative to a frame and at least one crease erasing member. This device is specific in that it includes a plate designed with: reception surfaces to receive, support and position the crease erasing member which is attached thereto, a unit for fixing to the frame, and guide surfaces pivotably connected for the roller.

Tube bending machines configured to bend a tube at a target bend location. The tube bending machines include a frame, a bending die assembly, and an alignment stem. The bending die assembly is supported on the frame and configured to bend the tube. The bending die assembly includes a bending die, a wheel frame, and a clamp. The wheel frame is coaxially mounted to the bending die. The clamp is configured to secure the tube to the wheel frame. The bending die, the wheel frame, and the clamp cooperate to define an actual bend location where the tube will be bent by the bending die assembly. The alignment system is operatively supported on the frame and configured to align the target bend location with the actual bend location.

A method for precision forming by continuous free bending starts with establishing a correlation equation of a continuous axis f(x) to a bending radius R and determining a bending radius R at a real-time location in the axis. Based on the free bending technique, the method further involves establishing a correlation model of a real-time bending radius R of a tube to an eccentric distance U of a bending die and hence correlations of the equation of the axis to free bending parameters, and constructing a complete correlation model among f(x), R, U, and t based on a relational equation of an eccentric distance U to movement time t of the bending die to enable the precision forming of a complex component by continuous bending. Accordingly, the production efficiency can be improved.

The present invention discloses a method for ultra-low temperature forming an ultra-thin curved part of a high-strength aluminum alloy. The method includes the following steps: step 1: selecting a cladding with a suitable thickness according to a wrinkle limit of a sheet; step 2: stacking the sheet and the cladding, then putting into a die, and closing a blank holder; step 3: filling a cavity of a female die with an ultra-low temperature medium to cool the sheet to below −160° C.; step 4: applying a set blank holding force by the blank holder, and enabling a male die to go down to form a thin-walled curved part; and step 5: opening the die and taking out the formed thin-walled curved part. The present invention utilizes the favorable formability of the high-strength aluminum alloy at the ultra-low temperature and the instability resistance of the thick sheet.

A bending device for forming a product from a workpiece includes a shaft driven to rotate by a motor, an actuator including an extendable end configured to secure a portion of the workpiece, and a die coupled to the shaft and driven about an axis. The die includes a peripheral portion including a channel configured to receive the workpiece. The channel includes a first end and a second end offset from the first end in a direction parallel to the axis. Rotation of the die about the axis causes the workpiece to bend along the channel.

The application of the 3D cameras during the profile bending process on the bending machine with three and four rollers provides controlled management, regulation of control as well as correction of the bending process, where the application of the 3D cameras (1) and (2) provides a three-dimensional view of the bending process and each point of interest on the machine (3) and on the profile (4) is defined dimensionally and in space. Utilizing the 3D cameras (1) and (2) during the bending process the profile (4) is detected, thus implementing a feedback loop between the computer (7) controlling the bending process and the profile (4) bent on the machine (3). The feedback loop created with the application of the 3D cameras (1) and (2) provides information regarding the profile (4) bending process on the machine (3) and based on this information the computer (7) is able to manage, regulate and correct initiated profile (4) bending process in order to receive desired output at the end of the bending process, that is, the profile (4) bent to the pre-determined angle, radius or diameter.

The present invention discloses a method for ultra-low temperature forming an ultra-thin curved part of a high-strength aluminum alloy. The method includes the following steps: step 1: selecting a cladding with a suitable thickness according to a wrinkle limit of a sheet; step 2: stacking the sheet and the cladding, then putting into a die, and closing a blank holder; step 3: filling a cavity of a female die with an ultra-low temperature medium to cool the sheet to below −160° C.; step 4: applying a set blank holding force by the blank holder, and enabling a male die to go down to form a thin-walled curved part; and step 5: opening the die and taking out the formed thin-walled curved part. The present invention utilizes the favorable formability of the high-strength aluminum alloy at the ultra-low temperature and the instability resistance of the thick sheet.

Apparatus for bending a coiled tubing, the apparatus having a head portion for lateral insertion in a side opening in a wall of a well, the head portion defining a bending path for bending the coiled tubing during feeding thereof through the head portion, and the head portion having a coiled tubing straightener for straightening the coiled tubing during feeding. The coiled tubing straightener is retractable so that it can adopt a retracted position, for lateral insertion of the head portion into the side opening of the well wall. The head portion has, when the straightener is in the retracted position, a profile as viewed in the direction of lateral insertion, and the straightener being extendable for operation to straighten the coiled tubing to an extended position at least partly outside of the profile of the head portion.

Disclosed are differential temperature push bending method and device for tube with small bending radius, the device comprising: a push bending die, core, fillers and pushers, wherein the core and the fillers are both arranged in a bending chamber of the push bending die, an inlet and an outlet end of the push bending die are respectively provided with a front guiding sleeve and a rear guiding sleeve, the pusher in the front guiding sleeve abuts against a plurality of fillers, and the pusher in the rear guide sleeve abuts against the core. A heat rod is provided at an outer end of the bending chamber. The present disclosure adopts differential temperature type push bending, flow performance of the tube blank at the outer corner of the die can be improved, and the material can be timely fed to prevent excessive stretching and thinning of the outer material.

A method for manufacturing a complex-curvature tubular product starting from a metal tube extending along a rectilinear longitudinal axis is provided. The method includes carrying out, by a first bending device, a plurality of first bending operations, each first bending operation being carried out on a respective first straight portion of the metal tube, and in a bending plane passing through the longitudinal axis, so that the metal tube leaving the first bending device has a respective plurality of first curved portions, separated by second straight portions, and carrying out on the metal tube leaving the first bending device, by a second bending device, a plurality of second bending operations, each second bending operation being carried out on one of the second straight portions so that the metal tube leaving the second bending device has, between each pair of consecutive first curved portions, a respective second curved portion, and the tubular product thus obtained has first and second curved portions immediately adjacent to each other.