When collaborative robots are mentioned, based on the understanding that they will stop immediately if they collide with a person or obstacle, many people's first reaction is that they are highly safe and do not require any protection.
Because of this preconceived notion, coupled with the flexibility and ease of use of collaborative robots, many small and medium-sized enterprises have introduced collaborative robots into their production lines, and some businesses have also taken advantage of the popularity of collaborative robots to promote their own products.
As shown in the image above, in this simulated application scenario, although the collaborative robot has the corresponding safety certifications, it is still dangerous for the robot to operate with a handheld knife. A worker could easily cause a "bloody incident" while changing vegetables.
Simply discussing whether collaborative robots are safe or not is not very meaningful. Risk assessments should be conducted for each specific collaborative robot application. This is what Pilz has always advocated: "There are no absolutely safe robots, only safe robot applications." Of course, the safety of the collaborative robot itself is also extremely important.
Safety standards for collaborative robots
ISO/TS15066:2016 clearly defines the concept of collaborative operation and the conditions required for its implementation. In addition to the conditions for design and risk assessment, it also provides the correspondence between the pain threshold of different parts of the human body and the robot's speed, pressure, and impact.
For example, ISO/TS 15066 specifies the maximum permissible collision values for faces:
☑ Pressure 65 N
☑ Pressure 110 N/cm²
If the collaborative robot's normal movement trajectory has a chance of colliding with a person's face, the force and pressure generated by the collision must be lower than the above values to ensure that no serious injury is caused.
However, although the standard provides clear thresholds, how exactly should the relevant collision parameters be measured correctly in the practical application of collaborative robots?
Pilz safeguards human-machine collaboration
Collision testing is the most direct and effective way to determine whether a collaborative robot is safe for specific applications.
Pilz offers professional crash testing services to its users.
Professional crash testing equipment: Pilz's professional assessment engineers use professional and precise crash testing instruments to help users' collaborative robots become truly "safe" collaborative partners.
The collision measurement system PRMS is mainly used to verify human-machine collaboration and to record the forces and pressures that lead to collisions.
Crash test software interface
Force or pressure data curves and their meanings
After the tests are completed, Pilz will provide a full crash test report:
Crash test export report cover
Safety training:
Pilz has developed globally standardized safety training courses for the robotics field, enabling users to easily master relevant robot standards and understand safe applications of human-robot collaboration.
security experts
Driven by the vision of "The Spirit of Safety," Pilz remains committed to safety, providing users with leading technologies and safe robotic solutions.
The robotics industry has enormous development potential. In an era of transformative change brought about by Industry 4.0, safety expert Pilz will continue to dedicate itself to creating a more complete and intelligent future.
Pilz China
Sales Hotline: 4006 4006 50 Website: www.pilz.com.cn
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