How To Maintain Industrial Robots? Taking The BORUNTE Robot 0707A As An Example

May 26, 2025

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BRTIRUS0707A is a six-axis robot developed by BORUNTE for certain monotonous, frequent, and repetitive long-term operations, or operations in dangerous and harsh environments. It has a 700mm arm span and a maximum load of up to 7kg. It has multiple degrees of freedom, flexibility, and can handle polishing, assembly, spraying, and other scenarios with ease. High protection level: IP65, dust-proof and waterproof. High precision: repeated positioning accuracy±0.03mm. It is suitable for applications such as handling, stamping, injection molding, polishing, cutting, deburring, gluing, palletizing, and spraying.

End load and eccentricity diagram (as shown in Figure ) (load capacity, unit: mm) XY direction: robot end plane direction, Z direction: perpendicular to the end plane direction.

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Attention: BRTIRUS0707A is designed for a rated load capacity of 7kg to optimize the performance and dynamic capabilities of the robot. By reducing the load spacing, higher loads up to the maximum load capacity can also be used. Special load situations must be accounted for and checked. If you need detailed consultation, please get in touch with the BORUNTE ROBOT R&D Center.

Operating beyond the load limit can cause the gearbox and motor to work under overload, resulting in increased wear, temperature rise, and reduced lifespan of the gearbox and motor. Severe overload may lead to damage to the gearbox and safety accidents.

When transporting robots, a crane should be used. Regarding the handling method, please refer to Figure 2.5. First, the robot's posture is set according to the standard angle of the receiver's posture. Then, thread the lifting belt through the three-axis body and avoid the corrugated pipe. It is recommended that the length of the lifting belt be 1.8M. If there is a plastic bag, the lifting belt should be pierced through the plastic bag.

 

Maintenance is divided into daily maintenance and regular maintenance, with the basic cycle shown in the figure below. Inspection personnel must prepare a maintenance plan and carry out maintenance effectively. Please refer to the table below for maintenance items. In addition, comprehensive disassembly and maintenance must be carried out every 20000 working hours or every 4 years, whichever is shorter. For operations with a high frequency of use, such as loading and unloading, it is recommended to carry out maintenance and comprehensive disassembly and upkeep at a cycle of about 1/2.

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Measure the iron powder concentration (iron content ≤ 0.015%) of the lubricating oil in the gearbox every 5000 hours of operation or every year (2500 hours of operation or every six months for loading and unloading purposes). When exceeding the standard value, it is necessary to replace the lubricating oil or the gearbox. Please contact our service center.

 

During maintenance, if more than the necessary amount of lubricating oil flows out of the machine body, please use a lubricating oil gun to replenish the flowing part. At this time, the nozzle diameter of the lubricating oil gun used should be below 8mm. When the amount of lubricating oil added is greater than the outflow, it may cause lubricating oil leakage or poor trajectory of the robot during operation, which should be taken into account.

 

After maintenance or refueling is completed, in order to prevent oil leakage, it is necessary to wrap sealing tape around the lubricating oil pipe joints and hole plugs before installation.

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It is necessary to use a lubricating oil gun that can clearly indicate the amount of oil to be added. When it is not possible to prepare an oil gun that can clearly determine the amount of oil to be added, the change in lubricating oil weight before and after refueling is measured to confirm the amount of lubricating oil to be added.

 

When the internal pressure rises within a short period of time after the robot has just stopped, lubricating oil may spray out at the moment of removing the inspection port plug.

 

Precautions for the installation and maintenance of the harmonic reducer

 

① According to the service life provided by the reducer manufacturer, the design life of each axis harmonic reducer is 15000h.

② Harmonic reducers belong to high-precision components and have inherent extreme stress. Excessive pushing and pulling, as well as unreasonable collisions, can cause damage to the internal structure of the reducer, resulting in reduced accuracy or abnormal noise. In severe cases, it can lead to the fracture of the reducer's flexible wheel and the scrapping of the reducer.

③ Harmonic reducers must be installed in a sufficiently clean environment, and no foreign objects are allowed to enter the reducer during installation to avoid damage to the reducer during use.

④ Please confirm that the gear teeth and flexible bearings of the reducer are always adequately lubricated. It is not recommended to use the tooth surface always facing upwards, as it will affect the lubrication effect.

⑤ After installing the cam, please confirm that the engagement between the flexible wheel and the rigid wheel is 180 degrees symmetrical (Figure A). If it deviates to one side (Figure B), it will cause vibration and quickly damage the flexible wheel.

⑥ After installation, please run at low speed (1000 rpm) first. If there is any abnormal vibration or noise, please stop immediately and contact our company to avoid damage to the gearbox caused by incorrect installation.

 

Surface rust prevention of the RV reducer

 

RV reducer is a core component of robots. Suppose it is exposed to the outside or to a highly corrosive environment for a long time. In that case, the outer surface of the RV reducer will show a certain degree of corrosion, such as yellowing and rusting, which will affect the appearance, service life, and safety of the robot. Therefore, we need to regularly maintain the RV reducer.

① Wipe the outer surface of the reducer clean with white oil and a clean cloth strip to ensure that there are no corrosive liquids or solids adhering to the outer surface of the reducer. If there is rust, it needs to be cleaned with fine sandpaper.

② After wiping with white electric oil, spray dry rust remover on the outer surface of the reducer. When spraying rust inhibitor, be sure not to miss or spray too little, as this will cause the rust inhibitor to fail to achieve its rust prevention effect.

Maintenance cycle: not exceeding three months.