In the world of industrial automation, innovations that optimize the performance of robotic systems are essential for improving the efficiency and precision of tasks. A notable example is the collaboration between Kuka and Kollmorgen, which led to a significant improvement in the power density of the motors used in the KR Agilus series robots.
Better Power Density for Compact Robots
Kuka’s KR Agilus series robots are designed for high-precision and high-speed tasks, ideal for general industrial applications such as packaging, electronics, and the pharmaceutical industry. These robots, which weigh only 51 kg, can handle loads of up to 6 kg, making them agile and fast tools. However, their exceptional performance is largely due to the AKM series synchronous motors from Kollmorgen, which were tailored to Kuka’s specific needs.
The challenge of the collaboration was to reduce the installation volume of the motors and adapt them to robotic applications without sacrificing performance. This co-engineering process allowed for the optimization of Kollmorgen’s standard motors to fit perfectly into the robot’s joints, increasing power density and improving operational efficiency.
Adaptation and Customization: AKM1 Motor
The AKM1 motor, the smallest in the AKM series, was adapted to fit perfectly into the robotic arm assembly, particularly in the wrist joint. Although it was initially already a small motor, it needed to be even slimmer for installation in this confined space. Through a co-engineering approach, controlled modifications were achieved, maintaining quality and standardization without compromising design integrity.
In addition to size and shape modification, the process included the incorporation of specific features such as cable protection and customized connector configurations, ensuring the motor integrated seamlessly into the robotic system.
Energy Efficiency and Simplified Connection
Kollmorgen’s AKM motors are known for their high-speed acceleration and energy efficiency. Additionally, the implementation of a unique single-cable connection system between the motor and the controller simplified installation, reduced assembly times, and minimized space requirements.
This modular approach allows for the configuration of more than 500,000 different combinations of permanent magnet motors, providing unparalleled flexibility to customize solutions according to customer needs.
Supply Chain Optimization and Quality
A key part of Kollmorgen’s strategy was the optimization of the supply chain, allowing Kuka to benefit from efficient production without compromising quality. Specific quality control tests and processes were implemented in the production cells, and packaging procedures were adapted to ensure the motors arrived efficiently at Kuka’s plant.
Furthermore, the collaboration extended its impact to other system components, such as an adapted brake that functions as both a holding and emergency brake, enhancing safe interaction between the robot and humans.
The collaboration between Kuka and Kollmorgen represents a significant advancement in the evolution of compact industrial robots. Thanks to the high power density and improvements in motor customization, the KR Agilus series now offers exceptional performance with high precision and speed, all while maintaining energy efficiency and a compact design. This partnership demonstrates how co-engineering can lead to the creation of cutting-edge automation solutions, optimizing both performance and the supply chain.
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