ELECTRIC CYLINDERS AND PRESSES WITH PRESS-FORCE OF UP TO 300KN

Stroke, speed, force, precision and life cycle are the most important characteristics of the system The cylinder consists basically of a motor and a spindle screw, with a nut running along it. Our spindle screw uses planetary roller technology (the finest at the state of the art) housed inside a sturdy tubular structure. The motor is driven by a servo drive, managed by the instrument Press-Right.

Being a press and not just a linear actuator, there are built-in sensors that enable the complete and accurate control of the pressing operations. The physical dimensions controlled are force and position. The force is measured by a load cell and the position is detected by an absolute encoder. The electric cylinders and presses are used where it is necessary to control the production process in real time for all pieces manufactured, in order to ensure that there are zero defects. • Active control of the process The movements are constantly controlled in terms of acceleration, speed and position....

Automatic speed reduction as approaching to the stopping point The system regulates the cylinder speed in real time, using the force and position transducers for feedback. The continuous regulation of the speed with feedback from the force transducer makes it possible to reach the required force in the best way: the speed is reduced only when the force measured during pressing approaches the required value. This reduces the cycle time and the real force applied does not exceed the required value. The system architecture also makes it possible to maintain the force constant for a specific time,...

Management of the cylinder stopping point When a determined force and/ or stroke value is reached, the stop and return of the press are commanded. Pressing interference control During the entire pressing operation, the interference between the two pieces to be assembled is checked. Control band The continuous band system guarantees control of every point of the press curve. This prevents all the uncertainties deriving from the use of discreet windows which leave some areas uncontrolled. The bundled software also allows the automatic creation of the band, based on sample curves. Geometric check...

© correctly positioned © incorrectly positioned © piece not inserted in the relative housing Non-destructive measurement For large and expensive parts. The cycle stops whenever the monitoring curve goes outside the tolerance band. As the check takes place in real time, it preserves the integrity of the piece. Check on elastic elements Determining fracture values From the curve measured, it is possible to determine the correspondence of the elastic element with the project specifications. The active check on the position allows precise measurement of force and height values at the time of fracture...

Stopping and holding the programmed force value Thanks to the feedback of the closed loop force value, the force is held constant, automatically and continually correcting the cylinder position. Correcting the structure deformation The instrument continuously calculates the real position of the cylinder, taking into account the deformation of the loaded structure. Relative position The working parameters can be automatically set referring to the contact point between the tool and the piece, regardless of the dimensional tolerances. Using a micrometric probe, this possibility is particularly useful...

THE CYLINDER AND ITS COMPONENTS The cylinder shown here highlights the main mechanical components of the system. Transmission group Made up of drive and conduct pulleys, connected by an inclined teeth belt. The fine pitch of the roller screw allows the assembly without speed reducer, benefiting reliability, noise and performance. The special inclined teeth belt guarantees: • silence • low vibrations Brushless motor with absolute encoder The best solution for: • torque curves • no maintenance • dimension-to-power ratio The absolute encoder keeps the cylinder position constantly in the memory (NO...

Press-Right Press-Right is a measurement system that provides 100% quality control on the manufacturing process. Interfaced to a position transducer and a force transducer, it continuously monitors the position/force curve and verifies that it stays within a purposely positioned continuous control range. The system architecture is based on a multi processor for data monitoring and analysis and is connected directly to the sensors. The instrument actively controls the movement ofthe motor, promptly controlling the force and position values. Rear panel A - USB port B - nr. 2 Ethernet ports C -...

Tool Press-Right The synergy between servo-drive and electronics is essential. The control system has been designed specifically for pressing operations and employs the experience of Alfamatic in this sector, dating back to 1992 WinScope® Software PLC For machine manufacturers, Alfamatic supplies an installation kit complete with press structure and electrical cabinet. See page 26-27. Alfamatic also offers a series of complete and certified pressing stations in a variety of configurations (with a c-frame, 2-column and electro-mechanical rotary table). Press-Right It controls the force and instantaneous...

Load cell Drive-unit Movement command Cylinder SA Table for cylinder/press selection Type speed

The models SA 10 and SA 25 use the same structure and size of the model with the highest force. The force and the maximum speed of the cylinder depend on the different transmission ratio. This allows the subsequent transformation of model SA 10 into SA 25 and vice-versa. The operation involves only the replacement of the load cell and the transmission group. Technical features Maximum force Maximum speed Repeatability with a constant load Precision of force measured Absorbed power Voltage Weight Ambient temperature Relative air humidity Precision of the anti-rotation system ±0,01 mm 0,5% F.S....