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Why Carbon fiber robotic arms becoming so popular recently? What issues we need considerate when decisions.

by 施sophia 21 Nov 2023

Why Carbon fiber robotic arms becoming so popular recently? What issues we need considerate when decisions.

 

  1. The reasons why the robotic arm take carbon fiber composite materials:

Weight light:

Traditional robotic arms are mostly made of metal materials, such as aluminum alloy and steel. In addition, the robotic arm is also loaded with some automatic detection devices, pipelines, cooling devices, etc., which causes the robotic arm to become a typical cantilever beam structure. Therefore, its own weight is an important factor in the movement of the robotic arm. The carbon fiber can reduce the own weight of the robotic arm, so as to enlarge the load capacity.

Dimensional stability:

Carbon fiber has excellent dimensional stability and can significantly reduce the deformation rate if robotic arms. The thermal expansion coefficient is small so the dimensions are stable.. According to experimental data provided by authoritative organizations, aluminum alloy robotic arm parts and carbon fiber robotic arm parts with a length of 100cm are both placed at room temperature 12°C for the same time. In the end, the aluminum alloy arm is change by 0.13mm, while the carbon fiber remains unchanged, so the high precision of equipment can be guaranteed by carbon fiber.

Chemical advantages:

Such as toughness and corrosion resistance: Aluminum alloy has relatively low toughness and lacks elasticity. Carbon fiber has the soft processability of textile fibers, so its toughness is much higher than that of aluminum alloy, and carbon fiber materials are less likely to break. Carbon fiber robotic arms will not produce rust or surface wear during long-term operations, meanwhile require less daily maintenance.

  1. How to reduce the overall cost and maximize economic benefits when selecting carbon fiber materials?

In the actual applications of industrial robots, different structures, positions, and types of work requires different mechanical arms. Although carbon fiber materials have outstanding advantages, they do not need to be used in every area of the robot due to their high cost. The most economical solution is to use them in combination with other types of materials in the design to maximize economy. If the robot's joints are subjected to high operating loads and suffer from large wear and stress, the carbon fiber can achieve lightweight, reduce the wear caused by its own weight, and positioning can be more accurate and faster due to its light weight. While in lower load-bearing area, Honeycomb or hollow structures can be used for low-rise locations, which is economical and can also meet lightweight and strength requirements.

 

  1. What should we pay attention to when designing robotic arms using carbon fiber materials?

Carbon fiber composite have excellent tensile strength, but are prone to tearing in the longitudinal direction. Therefore, corresponding stress calculation analysis (such as FEA analysis) must be carried out during design to ensure better reliability and safety. After the design is completed, the final results depend on the manufacturing process. Different compress processes will produce carbon fiber products with different properties, so the layup design in the process is also very important.

 

  1. Application scenarios of high-performance carbon dimensional robotic arm:

Robots are intelligent machine devices that can assist humans in performing some difficult and high-risk tasks in special or harsh environments, such as medical surgery, fruit picking, tunnel excavation, transportation, reconnaissance, demining, space robots, and submersible robots.

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