Key components of industrial robots - KUKA robots

To carry out industrial robots, we should focus on creating six iconic products, five key components, and four basic capabilities. In this issue, Zhongfa Zhizao introduces five key components - high-precision reducer, high-performance robot special servo motor and drive, high-speed and high-performance controller, sensor, and end performer.

Key components of industrial robots - KUKA robots

Key components of industrial robots - KUKA robots

1. High-precision reducer

Precision reducer, in the field of mechanical transmission, is the central device between the power source and the performance organization, usually it puts the power of the motor, internal combustion engine and other high-speed operations through the pinion on the input shaft, and meshes the large gear on the output shaft, so as to achieve the intention of reducing the speed and adding torque.

Without a reducer, the robot articulated arm cannot work normally.

Precision reducer can be divided into standard precision and high precision according to accuracy; According to the use, it can be divided into military and civilian; According to the operating environment, it can be divided into standard environment, low temperature environment, clean room environment and vacuum environment.

At present, there are few RV reducer manufacturers with large-scale production capacity and reliable product functions in the world, and the vast majority of the world's market share has been occupied by Japan companies. Although the price of domestic reducer is cheap and the supply period is short, there is a large distance between the product function and foreign products. Therefore, most of the domestic reducers can only be supplied to low-end robots by [keyword 212], which cannot meet the needs of the first robot shopping mall.

To this end, the "robot development plan" is clear, after the development of high-strength wear-resistant material skills, processing technology optimization skills, high-speed lubrication skills, high-precision device skills, reliability, exploration of life detection skills and new transmission mechanisms, to develop a series of reducers suitable for robot use, low weight, long-term protection-free.

2. Special servo motors and drives for high-performance robots

As a fulfillment element in the control system, the servo motor is one of the primary factors affecting the operation function of the robot. The robot servo system is composed of three parts: servo motor, servo drive, and command organization, the servo motor is the fulfillment organization, which is relied on to complete the movement, the servo drive is the power supply of the servo motor, and the command organization is to send pulses or give speed for the normal operation of the cooperative servo drive.

Now, AC and DC servo motors with high starting torque, large torque and low inertia are widely used in industrial robots. Domestic servo motors still need to make breakthroughs in the following aspects:

First, the shape is long and rough, which is difficult to use on some advanced robots.

The second is to improve the reliability of the signal connector, and the demand is optimized in the direction of miniaturization, high density and integrated planning with the servo motor body, so as to facilitate the installation, debugging and replacement.

The third is another central skill - high-precision encoders, especially the multi-turn [keyword 285] value encoders used on robots, which are severely dependent on imports, which is a big bottleneck that restricts the development of advanced robots in China.

Fourth, there is a lack of basic research, including value encoder skills, industrial production skills of first-class motors, and so on.

Fifth, the industrial coordination of all parts of the servo system is insufficient, which makes it difficult to play the overall function of the servo motor and drive system.

Servo motor is not only directly related to the competitiveness of domestic robot enterprises, in the long run, the development of the entire robot industry in China is of strategic significance. To this end, the "Robot Development Plan" particularly emphasizes that after the discussion of high magnetic material optimization, integrated optimization planning, processing device process optimization and other skills, the power of the servo motor will be improved, the power loss will be reduced, and the high power density will be completed. Carry out high-torque direct drive motors, disc hollow motors and other special motors for robots.

3. High-speed and high-performance controller

Is it a human who directs the robot's work? No, it's the manipulator. The industrial robot manipulator mainly controls the movement direction, attitude and orbit of the robot in the working space [keyword 88], the operation sequence and the time of action.

The manipulator is the "decision-making organization" that issues orders, and is the brain of the active chemical plant. Mastering the dominance of the controller is equivalent to controlling the functions of the robot. In China, the four major families of the controller market accounted for 53%, during which Fanuc accounted for 16%, Kuka accounted for 14%, and ABB robots accounted for 12%. The proportion of domestic brand controller shopping malls is less than 16%, which shows that in the field of controllers in China, the degree of domestic production is low.

At present, the following problems exist in domestic manipulator shopping malls:

1. There are complete types of robots that can be controlled by domestic controllers, but there is still a lot of room for improvement in terms of operation accuracy, stability, response speed, and ease of use.

2. The binding effect of the robot body and parts is strong, and the generally mature robot enterprises can complete the independent development and control of the body and central components, so it is difficult for domestic enterprises to break through simply as a controller.

3. The domestic controller is cost-effective, which is both an advantage and a disadvantage, and the advantage is that it can occupy low-end shopping malls and emerging categories that do not require high precision of robots; The downwind is mainly manifested in the ** shopping mall, the road is blocked and long.

To this end, the "Robot Development Planning" particularly emphasizes that through the development of high-performance joint servo, vibration suppression skills, inertia dynamic compensation skills, multi-joint high-precision motion calculation and planning skills, etc., the motion accuracy in the process of high-speed variable load use will be improved and the dynamic function will be improved. Carry out and master the skills of open manipulator software development channel, and improve the scalability, portability and reliability of robot manipulators.

Fourth, sensors

The sensor is a kind of detection device, which can feel the measured information, and convert it into electrical signals or other signals that can be measured according to certain rules, so as to meet the requirements of information transmission, processing, storage, display, recording, and control.

Key components of industrial robots - KUKA robots

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