2026 Body Robot Mass Production Explosion, How to Break the Increase in Joint Parts Processing Quantity?

Pain points in the industry of articulated robot joint processing

In today's era of rapid implementation of embodied intelligence, joints are the core moving parts of embodied robots, and their processing quality directly determines the operational stability, load capacity, and service life of the entire equipment.

Many embodied robot R&D teams and integration manufacturers have encountered such difficulties in the process of product implementation: poor consistency in joint part processing, increased joint clearance after six months of installation and operation of new equipment, repeated positioning accuracy deviation, and the need for shutdown, debugging, and maintenance; It is difficult to control the delivery time during small-scale trial production, and the strength of parts does not meet the standard. Under high load interaction conditions, deformation and failure are prone to occur, which delays the overall project progress; Traditional processing factories do not understand the stress design of the joints of embodied robots, resulting in insufficient release of internal stress after processing. Irreversible size changes occur after one or two years of use, directly shortening the service life of the robot.

Why do embodied robots prioritize five axis machining for joint processing

The structure of embodied robot joints is complex, and compared to traditional industrial robot joints, there are more complex surface structures that are adapted to dynamic interaction, involving multiple mating surfaces and extremely high coaxiality requirements. The choice of processing technology directly determines the long-term performance of the finished product. There are currently three common machining solutions in the industry: ordinary three-axis CNC machining, precision machining after casting, and five axis linkage CNC machining. Ordinary three-axis CNC machining requires multiple clamping, and the cumulative error is prone to exceed the standard. The machining ability of joint bases with complex surfaces is limited, and it also increases the difficulty of internal stress control; Although casting is suitable for large-scale production, it is prone to internal porosity and sand holes, making it difficult to meet the requirements of high load dynamic interactive embodied robots in terms of strength and consistency; Five axis linkage machining robot joints can complete multi-faceted machining with one clamping, reducing clamping errors, and easily handling complex surface machining, making it easier to optimize internal stress control processes. It is currently the mainstream choice for joint machining of high load body robots. Especially for articulated parts of all terrain dynamic walking robots, the dependence on five axis machining technology is increasing.

Three core difficulties in joint processing of high load embodied robots

The joint processing of embodied robots needs to ensure long-term stability, and the core difficulties mainly focus on three aspects, each of which has extremely high requirements for the technical capabilities of the processing plant:

Firstly, long-term stability control of multi station coaxiality.

The joints of embodied robots need to be closely matched with reducers and output shafts, and the coaxiality of multiple mating holes is generally required to be within Φ 0.01mm. If the coaxiality is not properly controlled, it will aggravate wear during the initial operation, and the load changes in dynamic interactive scenarios will be greater. After one or two years of use, the wear will continue to increase, directly reducing the service life of the robot. When Shenzhen Huiwen Zhizao was processing the joint seat of a 100kg load body robot, the customer requested that the coaxiality deviation should not exceed Φ 0.008mm after long-term use. By optimizing the clamping scheme and internal stress treatment process, the final product was retested by the customer two years after delivery, and the data still met the requirements, which was recognized by the customer.

Secondly, internal stress release and deformation control under high load dynamic interaction.

The embodied robot is subjected to alternating dynamic loads in interactive scenarios for a long time. If the internal stress is not fully released during the processing, it will experience slight deformation after six months to a year of use, resulting in positioning accuracy deviation and increased joint clearance, which affects the interaction performance. To solve this problem, it is not enough to only perform stress relief treatment once. It is necessary to arrange an aging treatment process after rough machining. For parts with high load requirements, secondary stress relief treatment is also needed to ensure long-term dimensional stability.

Thirdly, control the wear resistance of the mating surface.

The mating surface between the joint and the reducer is subjected to friction torque for a long time, and the load fluctuation in dynamic interaction scenarios is greater. It not only requires the surface roughness during processing to meet the requirements, but also ensures that the metallographic structure of the material is not damaged during the processing, which will affect the wear resistance performance in the later stage. The roughness requirement for the mating surface is generally within Ra1.6, and some high load joints require Ra0.8. If the roughness does not meet the standard, it will aggravate the initial wear, and the problem of increased clearance will occur in a short period of time; However, unreasonable processing parameters can lead to abnormal surface hardness of the material, reducing wear resistance life. This not only requires reasonable selection of processing tools, but also requires the processing plant to have mature precision machining process parameters.

Mature process flow for processing robot joint parts in Shenzhen

In response to the pain points of high load body robot joint processing, Shenzhen Huiwen Intelligent Manufacturing, as a professional robot core component processing service provider in the Pearl River Delta region, has formed a mature processing technology process that can stably output body robot joint components that meet long-term stability requirements:

The first step is the preliminary process review. After receiving customer drawings, engineers with more than 10 years of experience in robot parts processing will conduct process reviews, plan clamping methods, processing procedures, and stress relief schemes based on joint load levels and service life requirements, and proactively avoid potential risks in design and processing;

The second step is to relieve stress twice after rough machining. Using a five axis machining center for rough machining, leaving enough margin for precision machining, the first stress relief treatment is carried out. After natural aging for 72 hours, semi precision machining is carried out. After semi precision machining is completed, the second stress relief treatment is carried out to fully release the internal stress of the raw material and avoid deformation during subsequent use from the root;

The third step is precision machining and shaping. Use brand new imported cutting tools for precision machining, control the cutting speed and cutting amount, avoid damaging the material surface while ensuring accuracy, and ensure the roughness and wear resistance of the mating surface;

Step four, full-size inspection. After processing, a three coordinate measuring instrument is used for full-size inspection, and a inspection report is issued to ensure that all dimensions meet the customer's drawing requirements.

Advantages of robot joint processing by Huiwen Zhizao

As a national high-tech enterprise and specialized and innovative enterprise, Huiwen Zhizao has passed ISO9001 and IATF37949 quality management system certification, establishing strict standards in quality control. At present, the factory covers an area of 10000 square meters and has over 200 processing equipment, equipped with multiple high-precision coordinate measuring instruments, roughness detectors and other testing equipment. It is skilled in five axis machining to ensure the accuracy of robot joint parts.

For robot intelligent manufacturing services, in addition to humanoid robots, we can provide comprehensive OEM services for mechanical dogs, flexible robotic arms, bionic robots, medical robots, and more.

Especially for humanoid robots, Huiwen Intelligent Manufacturing innovatively adopts a combination process of "new materials+new molds+precision machining", relying on integrated design, intelligent manufacturing, and assembly full chain services to complete the entire process from research and development to batch delivery in one stop. Relying on the technical background of the Chinese Academy of Sciences, Huiwen Zhizao has long been deeply involved in the field of robotics and has served many listed companies and industry leaders, such as Lenovo, Xinsong, Xiaomi Ecological Chain, and Beijing Institute of Technology. The batch delivery qualification rate has remained stable at over 98%.

Summary: Finding a professional full industry chain service provider for joint processing of high load embodied robots

In summary, in order to meet the long-term stability requirements of high load dynamic interaction in the joint processing of embodied robots, processing factories need to have professional process capabilities, advanced processing equipment, and strict process control. As a high-end robot full industry chain service provider in the field of robotics in Shenzhen, Huiwen Zhizao provides hardware design and manufacturing services for robot bodies, covering the entire process of design (mechanical structure/electrical scheme design/process optimization), manufacturing (CNC machining/mold/surface treatment), assembly (component trial assembly/product assembly and debugging), supporting customers to choose single or multiple service modules as needed, with the ability to integrate "design+manufacturing+assembly", and can provide customers with complete services from joint structure optimization to finished product processing and assembly.

If you have the need for joint processing of embodied robots, please feel free to contact us at any time. Providing drawings can obtain free process review and quotation. We will provide you with stable and reliable processing solutions.