Pulley Bearing Press Station
The press station had to be transformed and renewed in accordance with the European standards and the Hungarian labour safety and security technology standards in order that the new station could produce the newly introduced parts.
The station consists of two separately controllable substations (leftward and rightward press, they were materialized in the course of the transformationof the system). The two stations operate independently of each other, the system control takes place on two distinct displays. The leftward and the rightward press operate in the same way.
The motion of the pressing slave cylinder is throttled by a mechanical component (a spring-actuated cylinder). The pressing slave cylinder can only move if the control of the retaining working cylinder is activated This kind of activation is not available for the operators as the retaining slave cylinder and the pressing working cylinder is controlled by the PLC at the same time.
The station is protected with light curtain. In case the safety light curtain discontinues, the motions are disabled immediately, the pressing slave cylinder is fixed by the spring-actuated working cylinder. An example for the operation process of a substation is given below, the description refers to both substations.
The station checks and measures:
the diameter of the bearing bore by using little pressure (Balluff odometer)
the pressure of TOX working cylinder (TOX pressure gauge)
the position of the bearings after using higher pressure (Heidenhain)
the value of higher pressure (dynamometer cell)
The operator inserts the Pulley into the seat and the bearings into the pressing tool then actuates the station with a switch. By using small power the pressing working cylinder checks the size of the bearing bore, then by using higher pressure it presses the bearing into its final position and it is protected against’drop-out) from the material of the pulley. Meanwhile, the station checks the pressure of the pressing working cylinder and then gauges the position of the bearing. After pressing, the two retaining Pulley slave cylinders keep the complete piece in the seat so that when the pressing working cylinder is moving to an upper position it can not pick up the piece from the pressing seat. After the bearing gets into the basic position, the retaining working cylinders go back to their basic position as well.
