1、 Industrial robot

1) Overview of industrial robots

Industrial robot is a multi-functional and multi degree of freedom mechanical device that can repeat programming to complete some operations or mobile operations under automatic control. It is an important engineering automation equipment in modern manufacturing industry. Industrial robot is a complex operating system, including control system, driving system, mechanical system, sensing system and so on.

Industrial robots generally adopt joint type mechanical structure. Each joint is independently equipped with a driving motor. The power amplification circuit of the driving unit is controlled by a computer to realize the operation of the robot. The composition of industrial robot is a closed-loop system, which completes the functions needed by people through motion controller, servo driver, robot body, sensor and other components.

With the weakening of China's demographic dividend and the deepening of industrial transformation and upgrading, the application scope of industrial robots will be wider and wider, and China's industrial robots will usher in a period of strategic development.

Key robot products:

1. Welding robot

2. Handling robot

3. Spraying robot

4. Palletizing robot

5. Logistics robot

6. Machining robot

7. Assembly robot

8. Detection robot

9. Clean Robot

2) There is a strong demand for industrial robots in China

China's robot market has developed rapidly in recent years and has become an important global industrial robot market. In 2013, the sales volume of industrial robots in China reached 37000 units, with a year-on-year increase of 41%, surpassing Japan to become the largest robot market in the world. In 2014, the sales volume of industrial robots in China reached 57000 units, a year-on-year increase of 54%. In 2015, the sales volume of industrial robots in China reached 75000 units, with a year-on-year increase of 32%.

Compared with Germany, Japan, South Korea and other countries, the robot density in China is still very low. In 2012, the number of industrial robots per 10000 people in China's manufacturing industry was only 23, far lower than the world average of 58 per 10000 people. Even if the incomparable factors are eliminated, there is still great room to improve the robot density in China, and the industrial robot market has great potential. In 2015, the market demand of industrial robots in China reached 75000 units and the ownership reached 266000 units. It is estimated that by 2020, the market demand of industrial robots in China will reach 150000 units and the ownership will reach 800000 units. By 2025, the market demand of industrial robots in China will reach 260000 units and the ownership will reach 1.8 million units.

2、 Industrial robot bearing

1. Types of industrial robot bearings

Industrial robot bearings mainly include the following four categories:

In addition to the above bearings, industrial robots also apply linear bearings, articulated bearings, magnetic bearings, aerostatic thrust bearings, etc.

2. Key technologies of industrial robot bearing

The development of modern industrial robots tends to be lightweight. To install bearings in limited space, they must be small and light, that is, lightweight. However, at the same time, the performance of the robot with high load, high rotation accuracy, high running stability, high positioning speed, high repeated positioning accuracy, long service life and high reliability requires that the supporting robot bearing must have the performance of high bearing capacity, high precision, high stiffness, low friction torque, long service life and high reliability. Lightweight and high performance are a contradiction.

Design Technology:

Thin wall bearings for industrial robots should not only ensure sufficient bearing capacity, but also require accurate positioning and flexible operation. Therefore, the bearing design analysis and determination of main parameters should not only take the rated dynamic load as the objective function, but also take the rated dynamic load, stiffness and friction moment as the objective function for multi-objective optimization design, At the same time, the finite element analysis method of Thin-walled bearing based on ring and frame deformation should be adopted.

Manufacturing technology:

(1) High precision detection technology of robot bearing dynamic quality;

(2) Micro deformation heat treatment process of thin wall bearing ring;

(3) Fine grinding process of bearing ring based on grinding metamorphic layer control;

(4) Precise control technology of negative clearance of Thin-walled bearing;

(5) Precise control technology of projection of thin-walled angular contact ball bearing;

(6) Precision assembly technology of thin wall bearing;

(7) Non contact measurement technology of thin wall bearing ring.