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Do you know how to choose the robot bearing?

Do you know how to choose the robot bearing?

2021-07-02

Robot bearings are a kind of bearings used in industrial robots. They are generally used as joint parts of bearings. The commonly used robot bearings are cross roller bearings and equal section thin-walled bearings.No matter what kind of bearing robot is in use, there are many matters needing attention. Today, I will tell you about the use of robot bearings.

First, the selection method for the use of robot bearings

1. Selection of bearing models

The bearing type is generally selected by the user's technical personnel according to the use conditions and bearing the load of supporting products. The business personnel mainly understand whether the actual load of the user is in line with the requirements. If the class is not up to the use requirements, they should quickly discuss with the customer to change the model, but there will be no problem in the selection of the model unless the special product.

2. Selection of bearing clearance

When buying uranium, users usually only tell the type and grade of the bearing, and rarely ask for the clearance of the bearing. It is necessary to understand the use conditions of the bearing, in which the speed, temperature, and tolerance of the bearing are directly related to the choice of the clearance of the bearing.

3, the choice of oil

The selection of grease is generally based on the special speed of the shaft, temperature resistance, noise requirements and starting torque, etc.

4. Selection of bearing seal type

Seals are divided into two kinds: contact seal and non-contact seal. The drag-contact seal has good dustproof performance but large starting power. The non-contact seal has small starting torque but better sealing performance than the contact seal.

II. Matters needing attention in the use of robot bearings

1. Pay attention to the selection and control of tolerance of the shaft and bearing chamber

The bearing should rotate flexibly without blocking sensation after pressing into the bearing. If there is obvious rotation is not flexible, it indicates that the size of the shaft is too large and the tolerance should be reduced. If the bearing is pressed into the shaft and rotated by hand, it may be that the tolerance of the shaft is too large or the roundness of the shaft is not good. Therefore, roundness should also be controlled when controlling the tolerance of the shaft and bearing chamber. At present, many domestic manufacturers only control the tolerance, but not the roundness.

2. Pay attention to the assembly mode of bearings

Because bearings are high-precision products if the improper assembly is easy to cause damage to bearing raceways, leading to bearing damage. The bearing should have a special mold when assembling, and can not be knocked at will. When pressing into the shaft, it can only be stressed by small rings, and when pressing large rings, it can only be stressed by large rings. Pressure or hydraulic pressure is required when mounting. The upper and lower dies should be in a horizontal state when pressing. If there is an inclination, the bearing channel will be damaged due to the force, and the bearing will lead to sound.

3, pay attention to prevent the assembly of foreign bodies

When the bearing is installed on the rotor for dynamic balance, it is easy to enter the iron filings generated during the dynamic balance into the bearing interior, so we need to do dynamic balance before loading the bearing. Some manufacturers in order to facilitate assembly, when installed in the bearing room coated with some oil or grease lubrication effect, but often the operator is difficult to control the child, if the oil or grease in the bearing room deposit more, it is easy to enter the bearing interior along the shaft when the bearing rotates. The bearing chamber does not need to be coated with oil or grease. If it is necessary to be coated, it should be controlled that there is no accumulation in the bearing chamber.

4, pay attention to prevent paint rust

Because the acid substances volatilizing from the insulating paint form corrosive substances under a certain temperature and humidity, the bearing channel is corroded and the bearing is damaged.So now can only choose good insulation paint, and in the drying after ventilation - assembly after a period of time.

5, pay attention to keep the bearing clean

Even small dust that can't be seen by the eye will bring bad effects to bearings. Therefore, it is necessary to keep the surroundings clean, so that the dust does not invade the bearing, and the foreign body is even worse. First, it is necessary to prevent the foreign body dust from keeping clean.

6, pay attention to the use of appropriate tools

Whether in the process of installation or disassembly, we must use the appropriate tools, to avoid replacing the existing tools, to prevent damage.

7. Use caution

Bearing is an important part, so be careful when using, do not give the bearing strong impact, will produce scars and indentation, causing the occurrence of accidents. In serious cases, cracks and fractures will occur, so attention must be paid to them. II. Matters needing attention in the use of robot bearings

1. Pay attention to the selection and control of tolerance of the shaft and bearing chamber

The bearing should rotate flexibly without blocking sensation after pressing into the bearing. If there is obvious rotation is not flexible, it indicates that the size of the shaft is too large and the tolerance should be reduced.If the bearing is pressed into the shaft and rotated by hand, it may be that the tolerance of the shaft is too large or the roundness of the shaft is not good. Therefore, roundness should also be controlled when controlling the tolerance of the shaft and bearing chamber. At present, many domestic manufacturers only control the tolerance, but not the roundness.

2. Pay attention to the assembly mode of bearings

Because bearings are high-precision products if the improper assembly is easy to cause damage to bearing raceways, leading to bearing damage. The bearing should have a special mold when assembling, and can not be knocked at will. When pressing into the shaft, it can only be stressed by small rings, and when pressing large rings, it can only be stressed by large rings. Pressure or hydraulic pressure is required when mounting. The upper and lower dies should be in a horizontal state when pressing. If there is an inclination, the bearing channel will be damaged due to the force, and the bearing will lead to sound.

3, pay attention to prevent the assembly of foreign bodies

When the bearing is installed on the rotor for dynamic balance, it is easy to enter the iron filings generated during the dynamic balance into the bearing interior, so we need to do dynamic balance before loading the bearing. Some manufacturers in order to facilitate assembly, when installed in the bearing room coated with some oil or grease lubrication effect, but often the operator is difficult to control the child, if the oil or grease in the bearing room deposit more, it is easy to enter the bearing interior along the shaft when the bearing rotates. The bearing chamber does not need to be coated with oil or grease. If it is necessary to be coated, it should be controlled that there is no accumulation in the bearing chamber.

4, pay attention to prevent paint rust

Because the acid substances volatilizing from the insulating paint form corrosive substances under a certain temperature and humidity, the bearing channel is corroded and the bearing is damaged. So now can only choose good insulation paint, and in the drying after ventilation - assembly after a period of time.

5, pay attention to keep the bearing clean

Even small dust that can't be seen by the eye will bring bad effects to bearings. Therefore, it is necessary to keep the surroundings clean, so that the dust does not invade the bearing, and the foreign body is even worse. First, it is necessary to prevent the foreign body dust from keeping clean.

6, pay attention to the use of appropriate tools

Whether in the process of installation or disassembly, we must use the appropriate tools, to avoid replacing the existing tools, to prevent damage.

7. Use caution

Bearing is an important part, so be careful when using, do not give the bearing strong impact, will produce scars and indentation, causing the occurrence of accidents. In serious cases, cracks and fractures will occur, so attention must be paid to them.

robot bearing

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