It simplifies and accelerates both frequent die changes and maintenance thanks to improved accessibility. Maintenance can now also be supported remotely. The 3-axis transfer with three gripper rail drive units, mounted vertically between the press uprights, connects two press beds with a surface area of 5350 x 2500 mm each. The feed per station is freely programmable from 0 to 1800 mm, as are the movements when closing (0 to 450 mm) and lifting (0 to 275 mm). This is matched to a blank lowerer, which takes the blanks with a maximum size of 1700 x 2200 mm from a magnetic conveyor belt and transfers them. The payload of the transfer system is 800 kg, the cycle rate for all three axes is between 16 and 22 strokes per minute. A distributed control concept was developed for the application. The basic functions are controlled by a fail-safe Simatic S7-319F.
The interaction of the more than 30 drive axes is coordinated by a Simotion D455-2, based on motion control functions from the standard Simotion SimoTrans application. Specialists from various Siemens departments accompanied the initial application from project planning to commissioning at the owner's site. One of the special features is an intelligent torque control system, which ensures that the torques are distributed evenly over three feed motors at a time. The drive configuration tool, Sizer, has proven to be very convenient and time-saving, enabling the machine builder to verify its calculations and then generate the order lists automatically. Thanks to the support of Siemens, the entry into the new control and drive world was quick and trouble-free.
Martin Hagel, Managing Director of Design and Development
And thus the necessary understanding and know-how for efficient integration of handling and press. The across-the-board compatibility of Siemens' product portfolio eliminates or minimizes lengthy interface adaptations and the associated errors right from the word go. "We see clear advantages in using coordinated components from a single source, ideally on the servo press, transfer and feeder," says Martin Hagel, Managing Director of Design and Development. This also simplifies the simulation, which in turn facilitates coordination and verification of the complex interplay, helps minimize risks and accelerates developments. "A 3D simulation helps to visualize complex processes more vividly and thus to communicate them faster. It is very important to be able to create and modify the underlying models yourself, i.e. not to be dependent on third parties," says Martin Hagel.
Hagel Automation GmbH from Grünkraut near Ravensburg has retrofitted an existing straight-side press with a new electronic 3-axis transfer on behalf of a globally operating press manufacturer in one of the largest automobile factories in Russia.
Excerpt from SIEMENS trade fair information sheet
spectrum metal forming 2014 | Press automation