In the fast-paced world of industrial automation, ‘hollow wrist’ robots have emerged as a breakthrough technology that promises to transform multiple sectors. These advanced robotic systems, characterised by their unique internal structure and capacity for precise and efficient operations, are redefining production and assembly standards in a variety of industries.
What is a ‘Hollow Doll’ Robot?
A ‘hollow wrist’ robot is distinguished by having a robotic arm whose end joint, or ‘wrist’, is designed with an empty space inside. This configuration allows the cables and hoses required to operate the tools at the end of the arm to pass through the robot’s internal structure rather than being exposed externally. This innovative design offers several significant advantages, such as increased motion accuracy, reduced cable wear, and greater application flexibility.
Advantages and Applications
1. Accuracy and Repeatability:
The ‘hollow wrist’ structure minimises interference from external cables, which improves the accuracy and repeatability of the robot’s movements. This is crucial in applications where accuracy is vital, such as electronic component assembly or high-precision soldering operations.
2. Reduced Maintenance:
By protecting the cables and hoses inside the robot structure, the risk of damage and wear and tear is significantly reduced. This not only prolongs the lifetime of the equipment, but also reduces maintenance frequency and costs.
3. Flexibility and Adaptability:
‘Hollow wrist’ robots are highly versatile and can be used in a wide range of industries, from automotive to aerospace, manufacturing to electronics. Their design allows them to adapt quickly to different tasks and configurations, which is ideal for production environments that require high flexibility.
Hollow wrist’ robots are a speciality in the field of industrial robotics, and several leading companies have developed models that stand out for their precision, efficiency and versatility. Below are some examples of these robots from well-known manufacturers such as KUKA, ABB, FANUC and Yaskawa.
1. KUKA
KUKA KR AGILUS Series
The KUKA KR AGILUS series is known for its compact design and hollow wrist, which enables precise and fast movements in confined spaces. Ideal for small parts assembly, material handling, inspection and testing. They feature high speed, precision and low maintenance thanks to internal cable protection.
2. ABB
ABB IRB 6700 Series
The ABB IRB 6700 series includes hollow wrist robots designed for demanding tasks in industrial environments. Used in welding, material handling, assembly and machine maintenance. They are robust and durable, with excellent repeatability accuracy and reduced wear on cables and hoses.
3. FANUC
FANUC M-20iA/35M
The FANUC M-20iA/35M is a hollow wrist robot designed for a variety of industrial applications. For machine loading and unloading processes, parts handling, assembly. They have a high payload capacity, high flexibility and integrated cable protection.
4. Yaskawa
Yaskawa MOTOMAN GP8
The Yaskawa MOTOMAN GP8 is a hollow wrist robot optimised for high speed and precision handling and assembly tasks. Ideal for material handling, component assembly, packaging. Perfect compact design, cable protection inside the arm, easy integration and programming.
Common Benefits of ‘Hollow Wrist’ Robots
– Protection of Cables and Hoses: By housing these elements within the robot structure, the risk of damage is reduced and their service life is extended.
– Accuracy and Repeatability: The absence of external cables interfering with movements improves accuracy.
– Reduced Maintenance: Less wear and damage to cables means less need for maintenance and less downtime.
– Flexibility and Versatility: Suitable for a wide variety of applications in different industries.
Industry Impact
The adoption of ‘hollow wrist’ robots is growing rapidly as more companies recognise their benefits. In the automotive industry, for example, these robots are used to assemble vehicles with a precision that would be impossible to achieve using manual methods. In electronics, they enable delicate handling of small and fragile components, improving quality and reducing the risk of errors.
Challenges and the future
Despite their many advantages, the implementation of ‘hollow wrist’ robots is not without its challenges. The initial cost of these systems can be a barrier for small and medium-sized companies. In addition, integrating this technology into existing processes requires careful planning and adequate training of personnel.
However, the future of ‘hollow wrist’ robots is promising. With the continued advancement of technology and decreasing costs, we are likely to see even greater adoption in a variety of industries. Innovations in artificial intelligence and machine learning may also boost the capabilities of these robots, making them more autonomous and efficient.
Hollow wrist’ robots represent a significant step in the evolution of industrial automation. Their ability to improve accuracy, reduce maintenance and offer flexibility makes them an invaluable tool for modern industry. As companies continue to look for ways to improve the efficiency and quality of their products, ‘hollow wrist’ robots are sure to play a crucial role in the future of manufacturing.This article aims to report on the advances and benefits of ‘hollow wrist’ robots, highlighting their positive impact on various industries and anticipating their role in the future of industrial automation.
UsedRobotsTrade, a leading robotic solutions company for the manufacturing industry, offers a wide range of collaborative and industrial robots, as well as Yaskawa spare parts and tools to facilitate task setup and programming. These solutions can help manufacturers improve the efficiency, productivity and quality of their products. Call us for more information.