Abstract:
In a mobile track working machine comprising a frame mounted for mobility on the track: a mechanism for bending the track rail section ends comprises a carrier frame vertically adjustably mounted on the machine frame above a respective track rail and having respective end regions spaced from each other in the direction of the track rail, a respective hydraulically operable and vertically adjustable thrust element mounted in a respective end region of the carrier frame for engagement with the running face of the track rail, an intermediate carrier transversely movably mounted on the carrier frame, and a rail lifting hook device supported centrally between the thrust elements on the intermediate carrier for engagement with the track rail, the hook device including two lifting hooks arranged symmetrically with respect to the vertical plane of symmetry of the rail, a respective pivot having an axis extending in the direction of the track rail and mounting a respective lifting hook for pivoting into a rail engaging position wherein the lifting hook subtends the rail head, and a respective drive linked to each lifting hook at another pivot for pivoting the hook linked thereto.
Abstract:
A press has an upper table carrying a punch and a lower table bearing a tool-carrier. A jack for compensating the deflection inherent in the bending process is fitted in the lower table. The bending device enables the bending angle obtained in the workpiece to be monitored continuously. The bending device includes a series of paired measuring rods, circular in section and longitudinally machined to provide a flat surface for the lower surface of the workpiece to rest on, associated with devices for measuring the rotational angle of the measuring rods, and a control device connected to the rotational angle measuring device, to a device for controlling the jacks that actuate the punch and to the actuating device of the jack for compensating the deflection. A very accurate and constant bending angle is obtained throughout the length of the workpiece. The bending process is automatic and continuous once the operator has fed in the required bending angle.
Abstract:
An electronic adaptive control system for use with hydraulic press brakes to provide compensation for material spring back to accurately produce a desired bend angle in the work piece with a single ram stroke. Fixed input parameters associated with the press brake and material properties, together with ram position and force data are continuously input to a digital computer which calculates the precise point of punch penetration necessary to reverse ram movement in order to produce the desired bend angle in the work piece. By using in-process measurements, a significant savings in machine set-up-time can be achieved in order to produce an accurate bend angle in the work piece the first time and every time.
Abstract:
Controlling the bending of an overlapping edge portion of a metal shield of a cable core by supporting one side of an edge portion at a position along its feed path and applying pressure against the edge portion immediately downstream of and in a direction opposite to the support. Bending of the edge portion occurs immediately it has passed the support while the support dampers resiliency in the edge portion to prevent or lessen springback. Apparatus for bending is placed immediately upstream of the overlapping die and preferably includes means to vary the applied pressure. Hence, the desired orientation of the bent edge portion is obtainable by varying the pressure dependent upon the actual orientation as the overlapped shield leaves the die.
Abstract:
A method of manufacturing a high fin density heat dissipator is disclosed in which the dissipator is extruded through a die in a partially cylindrical shape with the elongated fins arranged on the base and extending radially therefrom. The extruded dissipator is straightened under tensile and bumping forces in a manner such that the base assumes a planar shape and the fins become substantially parallel to each other. Apparatus for straightening the extruded dissipator and a die for extruding the same are illustrated and described.
Abstract:
A method of making a resilient double C-shaped clip for securing a rail on a support, wherein in advance of the heat treatment the ends adapted to cooperate with the support and with the foot of the rail are bent towards one another in the direction of the fastening force to such an extend that they are offset with respect with one another over a certain distance in relation to their position when the ready clip is free of load and wherein after the heat treatment the clip is subjected to a series of permanent deformations, each effected by imposing a permanent deformation force on one end of the clip while the other end is held in fixed position, such that upon a continued deformation there would be no increase or only a very small increase of the load, and the clip being relieved of load after each deformation.
Abstract:
A method of straightening an elongated workpiece, in which the workpiece is supported at two spaced points and straightening forces are applied between these points by an automatically controlled hydraulic ram, governed by a programming system which causes the first stroke of the ram to defect the work beyond the desired final shape by a distance approximately equal to the calculated maximum elastic deformation, the load is then removed and the residual error sensed, and a further series of strokes applied at constant increments, the residual error being sensed between strokes and used to initiate a second series of stroke increments of smaller value until the residual error falls below a final preselected value at which acceptable straightness has been achieved.
Abstract:
A METHOD OF BENDING METAL WHICH CONSISTS IN APPLYING PRESSURE TO THE AREA WHERE BENDING IS TO BE EFFECTED, THE FORCE OF THE PRESSURE HAVING A VALUE WHICH APPROXIMATES THAT AT WHICH THE BENDING OCCURS, THE METHOD ALSO INCLUDING AUGEMENTING SUCH PRESSURE, PREFERABLY MANUAL, TO EFFECT THE ULTIMATE DEGREE OF BENDING OF THE METAL, SUCH METHOD BEING PERFORMED BY A MACHINE INCLUDING A DEVICE FOR APPLYING PRESSURE, PREFERABLY A HYDRAULIC DEVICE, AND ANOTHER DEVICE, PREFERABLY MANUALLY POWERED, FOR AURGMENTING THE FORCE OF THE FIRST MENTIONED DEVICE, BUT AT A LESSER PRESSURE VALUE.