A core compressor is disclosed that includes a housing, a first pair of rollers and a second pair of rollers, both positioned in the housing. Each of the pair of rollers includes an upper roller and a lower roller. The first pair of the rollers is located proximate to a first end of the core compressor, and the second pair of the rollers is located proximate to a second and opposing end of the core compressor. The upper roller and lower roller of the first pair of rollers are located a first distance apart. The upper roller and lower roller of the second pair of rollers are located a second distance apart. Each roller includes at least one row of teeth extending generally perpendicularly away from the surface of the roller.

A core compressor is disclosed that includes a housing, a first pair of rollers and a second pair of rollers, both positioned in the housing. Each of the pair of rollers includes an upper roller and a lower roller. The first pair of the rollers is located proximate to a first end of the core compressor, and the second pair of the rollers is located proximate to a second and opposing end of the core compressor. The upper roller and lower roller of the first pair of rollers are located a first distance apart. The upper roller and lower roller of the second pair of rollers are located a second distance apart. Each roller includes at least one row of teeth extending generally perpendicularly away from the surface of the roller.

A method for operating an elastically mounted forming machine which is path-bound or force-dependent, in which method a working stroke of a ram device operatively connected to the drive is initiated by means of a drive, and a predefined forming process is carried out on a workpiece by moving the ram device during said working stroke, in particular due to the interaction of an upper tool located on the ram device with a lower tool located on a tool table, wherein the inertial forces and/or moments of inertia occurring during operation owing to the initiation of the working stroke and/or owing to an imbalance in the drive are at least partially compensated. The method, wherein at least one kinematic variable (s(t),v(t),a(t)) of a rigid body motion of the elastically mounted forming machine is detected during the operation thereof, wherein the time at which the working stroke is initiated is adapted to an instantaneous phase position of the at least one kinematic variable (s(t),v(t),a(t)) of the rigid body motion in order to generate inertial forces and/or moments of inertia so as to counteract the rigid body motion of the forming machine.

A method for operating an elastically mounted forming machine which is path-bound or force-dependent, in which method a working stroke of a ram device operatively connected to the drive is initiated by means of a drive, and a predefined forming process is carried out on a workpiece by moving the ram device during said working stroke, in particular due to the interaction of an upper tool located on the ram device with a lower tool located on a tool table, wherein the inertial forces and/or moments of inertia occurring during operation owing to the initiation of the working stroke and/or owing to an imbalance in the drive are at least partially compensated. The method, wherein at least one kinematic variable (s(t),v(t),a(t)) of a rigid body motion of the elastically mounted forming machine is detected during the operation thereof, wherein the time at which the working stroke is initiated is adapted to an instantaneous phase position of the at least one kinematic variable (s(t),v(t),a(t)) of the rigid body motion in order to generate inertial forces and/or moments of inertia so as to counteract the rigid body motion of the forming machine.

A method for pressing a workpiece with a predetermined pressing force uses a forming tool coupled with an electric motor via a spindle drive that converts the rotational movement of the electric motor drive shaft to a translational movement of the forming tool. The method includes: accelerating the electric motor in a first rotational direction to a predetermined maximal speed of rotation; operating the electric motor at the maximal speed until the drive shaft has completed a predetermined number of revolutions; reducing the speed of rotation of the electric motor to a predetermined reduced speed of rotation; operating the electric motor at the reduced speed until a pressing force increase exceeding a predetermined threshold value is detected by a measuring unit that follows the electric motor; forming the workpiece with constant detection of the pressing force by the measuring unit until the predetermined pressing force has been reached.

A method for pressing a workpiece with a predetermined pressing force uses a forming tool coupled with an electric motor via a spindle drive that converts the rotational movement of the electric motor drive shaft to a translational movement of the forming tool. The method includes: accelerating the electric motor in a first rotational direction to a predetermined maximal speed of rotation; operating the electric motor at the maximal speed until the drive shaft has completed a predetermined number of revolutions; reducing the speed of rotation of the electric motor to a predetermined reduced speed of rotation; operating the electric motor at the reduced speed until a pressing force increase exceeding a predetermined threshold value is detected by a measuring unit that follows the electric motor; forming the workpiece with constant detection of the pressing force by the measuring unit until the predetermined pressing force has been reached.

A press machine includes: a ram, a shaft, and three or more ram driving cams, for the one ram, configured to push down the ram toward a bottom dead center, the plurality of ram driving cams being integrally rotatable with the common shaft. Both end portions of the shaft are rotatably supported by a pair of rotation support portions fitted to the both end portions between which all of the plurality of ram driving cams are disposed, and an intermediate portion of the shaft disposed between the ram driving cams is rotatably supported by a support groove opened downward. The plurality of ram driving cams includes at least two lifting and lowering cams configured to apply both a pushing down force and a pushing up force to the ram, and at least one lowering cam configured to apply only the pushing down force to the ram.

Press-fitting work is evaluated by appropriately determining a load when sliding occurs. A load-drop determination unit determines whether or not a load value detected by a load detecting unit exceeds a load-drop determination value decided based on a moving average value and a dispersion average value stored in a storage unit. A data substitution unit substitutes the load value which is determined to exceed the load-drop determination value in the load-drop determination unit with a predetermined value.

A press machine includes: a press control unit that controls ascending/descending motion of the slide; and an abnormality diagnostic unit configured to perform abnormality diagnosis of the press machine based on data from a sensor provided in the press machine and to output a result of the abnormality diagnosis. The abnormality diagnostic unit is configured to perform the abnormality diagnosis, based on the data acquired from the sensor while the slide moves at a predetermined speed between a bottom dead point and a top dead point in a press-no-load state.

A press machine includes: a press control unit that controls ascending/descending motion of the slide; and an abnormality diagnostic unit configured to perform abnormality diagnosis of the press machine based on data from a sensor provided in the press machine and to output a result of the abnormality diagnosis. The abnormality diagnostic unit is configured to perform the abnormality diagnosis, based on the data acquired from the sensor while the slide moves at a predetermined speed between a bottom dead point and a top dead point in a press-no-load state.