초록 ▼

The device comprises a support (11) equipped with a fastening element, an assembly (12) mounted movably relative to the support (11) in the direction of the axis (8) of the tubular piece, a pole (13) mounted in the assembly (12) in the direction of the axis (8), an electrode holder (14) in several p

The device comprises a support (11) equipped with a fastening element, an assembly (12) mounted movably relative to the support (11) in the direction of the axis (8) of the tubular piece, a pole (13) mounted in the assembly (12) in the direction of the axis (8), an electrode holder (14) in several parts, and an actuating rod mounted movably in the pole (13) in the direction of the axis (8), in order to ensure the spacing of the various parts of the electrode-holder (14) and the radial movement of the electrodes. A vibrator (16) enables vibration of the pole (13) and the electrode-holder (14) in the direction of the axis (8). In a first phase, the wall of the tubular piece is pierced as a result of the radial movement of the electrodes, and in a second phase, cutting is carried out as a result of the axial movement of the movable assembly (12) carrying the pole (13).

대표청구항 ▼

Device for cutting by electrical discharge machining the wall of a tubular piece crimped inside a cylindrical receptacle in a fixed installation, in order to make, from the inside of the tubular piece, at least two cuts directed axially relative to the cylindrical receptacle and to the tubular piece

Device for cutting by electrical discharge machining the wall of a tubular piece crimped inside a cylindrical receptacle in a fixed installation, in order to make, from the inside of the tubular piece, at least two cuts directed axially relative to the cylindrical receptacle and to the tubular piece, comprising at least one electrode, means for supplying said electrode with electrical current, and means for circulating water in the tubular piece, and further comprising: (a) a support provided with means for fastening to the fixed installation adjacent the cylindrical receptacle and with guide means in a direction corresponding to an axial direction of the cylindrical receptacle upon fastening of the support; (b) an assembly mounted movably relative to the support in said axial direction as a result of the guide means and comprising drive means for movement in said axial direction; (c) a tubular pole mounted on the assembly, having a longitudinal part a diameter of which is less than an inside diameter of the tubular piece; (d) an electrode-holder fastened to the free end of the longitudinal part of the pole and taking the form of a tubular piece part of whose bore is of frusto-conical shape, separated into at least two segments, each carrying an electrode, by means of axial cuts; (e) an actuating rod mounted so as to be axially movable in the tubular pole and associated with means for axial movement and of which the end penetrating into the frusto-conical bore has a diameter greater than the diameter of the bore and allows radial movement of the electrodes; and (f) a device for causing axial vibration, said device having a part movable in the axial direction and fixed to the tubular pole and a fixed part mounted on the movable assembly.