Abstract: A method for bending a work of a plate shape by moving a die with the work being butted against a butting member, and an apparatus for executing the method are provided. The bending apparatus is provided with an input unit for inputting data on bending conditions including respective target values of a bending angle and a bending dimension, as well as respective measured values of a bending angle and a bending dimension of the work obtained in trial bending. A control device installed in the apparatus executes an initial computation for computing an operation amount of the die when the data on bending conditions are inputted. Further, the control device executes computation for a correction value for an operation amount of the die and computation for an estimated value of a bending dimension when the respective measured values of the bending angle and the bending dimension obtained in trial bending are inputted.

Abstract: In a plate thickness detector for a bending machine causing a punch to make a relative stroke and bending a workpiece mounted on an upper surface of a die cooperatively by the punch and the die, a displacement gauge (17) is provided in the die, is always urged upward from a V-groove of the die, and measures a distance from the upper surface of the die to a lower surface of the workpiece, and ram position detection means (11) detects a relative stroke quantity of the punch to the die. The punch is caused to bend the workpiece from a position away from the die by a reference inter-blade distance.

Abstract: In bending a workpiece (W), a position of the workpiece W relatively pressed down by a punch (P) is directly detected by a plurality of position detection means (RDC1, RDC2 and RDC3) provided in a V-groove (11) of a die, and a bending speed calculation section obtains a bending speed from a change in this position. If bending speeds at position of the respective position detection means differ, a uniform speed arithmetic operation section calculates a bending speed to make the bending speeds at the positions of all of the position detection means uniform, and a driving shaft instruction section controls driving shafts (7L, 7R) to bend the workpiece at the uniform bending speed.

Abstract: A reciprocating press for forming workpieces includes a tilting table that supports the workpiece and positions it with respect to the press tooling as the press closes, and then is pivoted upward into an inclined orientation as the press opens so that the finished workpiece falls down the table and is automatically discharged from the press. A preferred embodiment has a lifting arm attached to an upper reciprocating press member that carries an upper forming tool such as a punch. The lower end of the lifting arm engages the tilting table such that the table is pivoted about a horizontal axis in concert with the upward and downward movement of the reciprocating press member. The press preferably also includes a safety door that is automatically closed before the press fully closes and is opened again as the press opens such that operator access to the moving press parts is prevented by the door during a press cycle.

Abstract: A crimping including a stand at which a motor and a transmission are arranged. Moreover, first guides, at which a crimping bar is guided, are arranged at the stand. A shaft driven by the transmission has an eccentric pin at one end, and a resolver for detection of rotational angle is coupled to the other end. The crimping bar includes of a slide member guided in the first guides and of a tool holder with a retaining fork. The slide member stands in loose connection with the eccentric pin, wherein the rotational movement of the eccentric pin is converted into a linear movement of the slide member. The tool holder actuates a tool, which together with an anvil produces the crimp connection. An operator terminal is provided as an interface between the operator and the crimping press. The operator terminal includes a rotary knob and a keypad for input of operating data and commands into a control. A display is provided for visualization of data.

Abstract: A press-bending machine to bend metal sheets, having improved features in the respective press-bending with measuring and control system operating on at least four points of the bending angle, of the type in which the press-bending machine has: an upper vertically reciprocal elongated bending punch; a lower static elongated bending matrix with at least a longitudinal bending groove; feeler means to measure the respective bending movement of the metal sheet in bending inside said bending groove, to control by data process logic unit the bending parameters of bending process in said bending machine, said feeler means operating with at least four bending detection points, characterized in that all said detecting points are conceived in such a way to be divided in two sets of bend detecting points, one to one side and one to the other side and in a symmetrical way divided in number and position respective to the vertical plane passing along the respective sheet bending line corresponding with the bending corner o

Abstract: A method of adjusting the stroke of a press brake having a movable beam (1) supporting a punch (2), a fixed beam (3) supporting a die (4), means of displacing (5, 5′) the movable beam with respect to the fixed beam, said displacement means resting on side frames (6, 6′) immovably attached to the fixed beam, linear encoders (9, 9′) for measuring the displacement of the movable beam with respect to the side frames, at least one sensor (8, 8′) measuring a physical parameter (p) varying with the force exerted by said punch on a metal sheet placed on said die, and an electronic device for controlling (7) the bending movement controlling the speed of said displacement movement between top dead center and bottom dead center (BDC), provided with a calculation means for correcting the value of said bottom dead center depending on the measurement of said displacement and said physical parameter.

Abstract: A bend angle correction method directed to carrying out simple and accurate penetration of a movable die into a fixed die to produce a uniform angle throughout the length of a workpiece, being unaffected by material variations. When bending a sheet-like workpiece to a desired angle by the cooperative movement of a movable punch driven by three or more drive shafts and a fixed die disposed in an opposing relationship with the movable die, the bend angle of the workpiece is measured during bending operation and the difference between the measured bend angle and a target angle is obtained, at at least three points which are the ends and center of the workpiece. Based on the differences, correction amounts for the penetration of the movable die are obtained on a shaft-load imposed point basis.