Abstract: The invention relates to a method for fracture-separating a workpiece which comprises one or more ring-shaped workpiece sections that are aligned axially one behind the other. The method comprises the following steps: fixing the workpiece for the fracture-separation process; axially introducing at least one expansion device into at least one borehole which is formed in each ring-shaped workpiece section; creating at least one fracture notch in at least one borehole during and/or after the axial introduction of the expansion device; and expanding the expansion device for fracture-separating at least one ring-shaped workpiece section. The invention also relates to a device which is suitable for carrying out said method.

Abstract: The invention relates to a method for fracture-separating a workpiece which comprises one or more ring-shaped workpiece sections that are aligned axially one behind the other. The method comprises the following steps: fixing the workpiece for the fracture-separation process; axially introducing at least one expansion device into at least one borehole which is formed in each ring-shaped workpiece section; creating at least one fracture notch in at least one borehole during and/or after the axial introduction of the expansion device; and expanding the expansion device for fracture-separating at least one ring-shaped workpiece section. The invention also relates to a device which is suitable for carrying out said method.

Abstract: The invention relates to a method for fracture-separating a workpiece which comprises one or more ring-shaped workpiece sections that are aligned axially one behind the other. The method comprises the following steps: fixing the workpiece for the fracture-spectrum process; axially introducing at least one expansion device into at least one borehole which is formed in each ring-shaped workpiece section; creating at least one fracture notch in at least one borehole during and/or after the axial introduction of the expansion device; and expanding the expansion device for fracture-separating at least one ring-shaped workpiece section. The invention also relates to a device which is suitable for carrying out said method.

Abstract: The invention relates to a method for fracture-separating a workpiece which comprises one or more ring-shaped workpiece sections that are aligned axially one behind the other. The method comprises the following steps: fixing the workpiece for the fracture-separation process; axially introducing at least one expansion device into at least one borehole which is formed in each ring-shaped workpiece section; creating at least one fracture notch in at least one borehole during and/or after the axial introduction of the expansion device; and expanding the expansion device for fracture-separating at least one ring-shaped workpiece section. The invention also relates to a device which is suitable for carrying out said method.

Abstract: The invention relates to a device for fracture-separating a workpiece comprising several ring-shaped workpiece sections which are aligned axially one behind the other. The device comprises at least one expansion device which can be introduced axially into a borehole, formed in each ring-shaped workpiece section and has at least one expansion element that can be expanded in at least two axial expansion areas which lie at a distance from each other in the axial direction. The expansion device is provided with an integrated expansion control device which interacts with the expansion element for controlling a variable position and/or a variable expansion distance and/or a variable expansion period and/or a variable expansion sequence of at least the two expansion areas.

Abstract: An apparatus fracture-separates an annular piece, such as a connecting rod. The apparatus includes one stationary and one mobile expandable jaw for insertion into a bore hole in the annular piece. An expanding device separates the expandable jaws. The fracture behavior of the annular piece can be influenced. To this effect, the peripheral surface of the expandable jaws is so configured that the expandable jaws engage in the inner surface of the bore hole only via a region of reference surfaces or lines which is defined locally with precision.

Abstract: A device for separating the rod and cap of a connecting rod by breaking includes a fixed expansion mandrel half on a fixed device part a mobile expansion mandrel half on a device part which moves in the direction of expansion, and support elements for the rod and the cap. The device has a long service life without operational problems and can separate the rod and cap of a connecting rod from each other with a high degree of precision. To this end, the adjustable support elements are arranged on the fixed device part and the fixed support elements are arranged on the mobile device part.

Abstract: The invention relates to a device for fracture-separating a workpiece comprising several ring-shaped workpiece sections which are aligned axially one behind the other. The device comprises at least one expansion device which can be introduced axially into a borehole, formed in each ring-shaped workpiece section and has at least one expansion element that can be expanded in at least two axial expansion areas which lie at a distance from each other in the axial direction. The expansion device is provided with an integrated expansion control device which interacts with the expansion element for controlling a variable position and/or a variable expansion distance and/or a variable expansion period and/or a variable expansion sequence of at least the two expansion areas.

Abstract: A method and an apparaus for fracturing cap and shaft of connecting rods manufactured by powder forging in which the cap or the shaft of the connecting rod is fixed on a support movable perpendicularly to the plane of fracture, the portion of the connecting rod not fixed on the support is held stationary, and a straight central impact acting along the axis of symmetry of the connecting rod is applied to the support in the direction of fracture.

Abstract: A method for fracturing the cap and shaft of connecting rods manufactured by powder forging in which the cap or the shaft of the connecting rod is fixed on a support movable perpendicularly to the plane of fracture, the portion of the connecting rod not fixed on the support is held stationarily, and a straight central impact acting in the axis of symmetry of the connecting rod is applied to the support in the direction of fracture.