1. Presses = inflexible?
In the past, presses were often labelled as "sluggish", "inflexible" and "high-risk". With the development of technology, safety solutions for presses are emerging one after another, and the safety of presses is greatly improved. On the premise of ensuring safety, the owners put forward further requirements for flexibility and efficiency in production.
In the case we will introduce today, a manufacturer of kitchen accessories wanted to improve efficiency by introducing robots to load press brakes, that is, to load materials by both robots and manually during the operation of the equipment. In order to control costs, the existing controller needs to be used as much as possible so that its original functionality is not affected.
2. Is there no risk in a safe press with only the addition of robots?
If the press had a safe solution, just adding a robot for material loading, wouldn't there be any risk? Apparently not!
The interface area between the robot and the press brake becomes a new area of risk. In order to protect the operator from accidental injury, on the one hand, it is necessary to ensure that no operator is in front of the robot while it is loading. On the other hand, it is essential to guarantee that the operator is protected when inserting or adjusting the position with his hands, especially their fingers.
Of course, any protective measures or safety devices must be designed in such a way as not to impede the free movement of the operator.
3. Can the interface area between the robot and the press be safely implemented quickly?
The press brakes and service robots themselves actually have their own safety controllers. On press brakes, the camera-based protection system PSENvip from Pilz monitors safety. What we needed was an integrated, efficient interface security solution.
The camera-based protection system PSENvip from Pilz is installed on the upper die and ensures the safety of the operator of the press brake
In order to realize the interface safety of the two devices, it is necessary to have a safety control product that can monitor various safety devices on the press and robot equipment at any time.
The new generation of safety relays, myPNOZ, which can be pre-installed and customised, is exactly what meets the requirements.
With the myPNOZ Creator online software tool, you can define the number, type and logical interconnection of safety functions. Based on these parameters, Creator will automatically calculate which modules are needed and in which order they are inserted, which is very convenient.
myPNOZ is also very flexible in terms of application, as it offers up to 12 different expansion modules, each of which can monitor two safety functions, which reduces hardware costs and minimizes cabling costs. In addition, myPNOZ allows for the creation of several independent safety zones where the monitored machines can be switched off independently, which is crucial for increasing the availability of plant equipment.
myPNOZ can be produced in 1 batch according to the customer's specific requirements. myPNOZ monitors the safety functions of emergency stops, safety gates, light curtains, two-hand control IIIA/C and enabling switches.
4. Is such a solution operational?
The solution mentioned above in combination with myPNOZ is a real-life example of Pilz providing services to Peter Huber AG.
The company is a provider of innovative automation solutions with more than 40 years of experience in the modification and optimization of robots, handling systems, data and control systems, and more.
"During the design phase, Pilz recommended the modular safety relay myPNOZ for us. The idea of expanding the input circuit with just one safety relay immediately opened our minds. This solution can be said to be almost 100% satisfying to our needs. We were able to prepare everything in advance for installation, which was a huge benefit for us in terms of time and cost. Erich Schumacher, an expert in conveyor technology, handling and robotics, commented.
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