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Video: Ultrasound Solution Protects Users In HRC Applications
Have you ever got in the way of a robotic arm that was specially designed for human-robot collaboration (HRC)? Then you yourself know how much trust in the technology this requires - despite knowing the safety precautions. In addition, it is not always safe to say that the arm of a robot may stop when it comes into contact, but if it carries a workpiece, it can pose a far greater danger - it is not for nothing that the industry speaks of the “sword in the gripper”.
Speaking of the gripper: Even the tool can be dangerous due to the force it exerts: Especially with pointed and sharp-edged parts of screwdrivers or grippers, the values for pressures and forces can exceed the permissible limit values of the technical specification ISO / TS 15066 even at low speeds.
In order to protect people when touched, the speed of the tool had to be reduced to such an extent that the moment of force sensors are sufficient for protection. However, low speeds of, for example, 40 mm / s are not economical. The desired cycle times cannot be achieved, which questions the cooperation between humans and robots. At the very beginning of industrial robotics, it was therefore considered how robots can protect themselves without having to sacrifice the HRC concept.
Nature as a role model
In his new development of the Utraschall Safety sensor solution, Mayser had set itself the task of allowing robots to operate in the collaboration for as long as possible without reducing speed. Nature served as a model: “Our greatest success to date in this area, ultrasound safety, shows analogies to ultrasound location of the bat. With our unique technology, we can secure the workpiece as the greatest source of danger and at the same time increase the process speed from 40 mm / s to up to 200 mm / s depending on the application,”says Thomas L. Zawalski, Managing Director at Mayser. With the certified solution, the path to safe and economical HRC was created. According to Mayser, ultrasound safety can be used alone or in combination with other system components such as tactile collision protection,which becomes a kind of "feeling" skin of the robot by means of sensors, or a soft cover can be applied.
Ergonomic workplaces required
For the joint pre-development with Kuka for a Kuka LBR Iiwa, it was crucial that the ultrasound safety for personal protection is approved according to ISO 13849-1: 2015 category 3 PL d and thus efficiently supports people with heavy work through closer cooperation with the robot can be. Ergonomic jobs are also required by the trade associations, since the retirement age will shift in the long term and longer work will also be required in production. It is all the more important to have an efficient human-robot collaboration that offers people the highest ergonomics and at the same time ensures the profitability of the system.
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Content of the article:
- Page 1: Ultrasound solution protects users in HRC applications
- Page 2: Higher productivity through the creation of protective and warning fields
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