Brief introduction of industrial robot
Industrial robot is a multi-purpose, reprogrammable, widely used in the industrial field of multi joint manipulator or multi degree of freedom machine device, with a certain degree of automation, can rely on its own power and control ability to achieve a variety of industrial processing and manufacturing functions. Industrial robots are widely used in electronic, logistics, chemical and other industrial fields.
Industrial robots usually have three or more programmable axes. In order to adapt to different uses, the mechanical interface of the last axis of the robot is usually a connecting flange, which can be connected with different tools or end effectors.
Common types of industrial robots
According to different application fields and uses, industrial robots are generally divided into welding robots, palletizing robots, assembly robots, spraying robots, handling robots and so on.
It refers to the industrial robot that is engaged in welding (including cutting and spraying). Welding tongs or welding (cutting) guns are installed on the connecting flange at the end of the robot to enable it to carry out welding, cutting or thermal spraying.
Welding robot has the characteristics of stable performance, large working space, fast movement speed and strong load capacity. Welding robot is generally divided into hollow welding robot and general welding robot. General welding robot body generally adopts general 6-axis robot, while hollow welding robot is designed for welding automation. Its structure can be directly installed with welding machine and other equipment.
No matter what kind of industrial robot, as long as it has the welding process and the system has the welding parameter setting, it can be basically applied in the welding field. The selection of suitable welding robot is based on the actual production situation, combined with the product situation, specifications and welding requirements.
It refers to the industrial robot that is engaged in palletizing operation, which arranges the objects that have been loaded into containers on pallets or other vehicles according to certain rules. Different types of grabbing mechanisms are installed on the end flange to realize flexible grabbing.
Palletizing robot generally adopts coordinate robot with simple structure, low failure rate, reliable performance and simple maintenance. Generally, the 4-axis form is often used, with less overall floor area, strong applicability and low energy consumption. It only needs to locate the starting point and placement point, and the teaching method is simple and easy to understand.
The application of palletizing robot is more specific, generally it can only carry out plane handling and palletizing, and the automatic palletizing program can be set by software.
The structure types of industrial robots designed to complete assembly operations include horizontal joint type, rectangular coordinate type, multi joint type and cylindrical type. Compared with general industrial robots, assembly robots have the characteristics of high precision, high flexibility and small working range.
It refers to the industrial robot that can spray paint or other coatings automatically.
The spraying robot mostly adopts 5 or 6-DOF joint structure, the arm has a large movement space, and can do complex trajectory movement. The more advanced spraying robot wrist adopts flexible wrist, which can not only bend in all directions, but also rotate, and its action is similar to human wrist.
The spraying robot has the characteristics of large flexibility, large working range, plug-in structure and modular design, and low requirement for the repeated positioning accuracy of the robot.
It refers to the industrial robot that can carry out automatic handling operation.
Handling robot and palletizing robot are basically the same, the main difference is that the handling robot uses more 6-axis form, which is characterized by high speed and high flexibility.
Generally, the handling robot combines the conveying line and processing equipment to complete the grasping and handling of materials and realize the unmanned production and transportation.
Industrial robot selection
Industrial robot is usually composed of robot body and end effector. In the application process of industrial robot, the robot body is usually selected according to the use conditions, and the end effector is customized for different industries and environments.
For the selection of robot body, the main selection parameters are application scenario, degree of freedom, repeat positioning accuracy, payload, working radius and body weight.
For different application scenarios, the suitable robots are also different. Multi axis robot, cooperative robot, horizontal joint robot and parallel robot can maximize their working ability in their respective application scenarios.
The number of axes of a robot is directly related to its degree of freedom, which generally depends on the application scenario. Different degrees of freedom affect the application cost of the robot. If the cost is allowed, more axes can improve the overall compatibility.
Repeat positioning accuracy
It generally refers to the accuracy of the robot to achieve the same position every time when it completes the routine tasks. The repeated positioning accuracy affects the accuracy and stability of the robot. Different application scenarios have different requirements for the repeated positioning accuracy of the robot. For example, the palletizing of large materials generally does not require high positioning accuracy, but the assembly robot used in some processing and manufacturing industries needs high repeated positioning accuracy.
The maximum load that the robot can carry in its workspace, which includes the weight of the end effector attached to the end shaft of the industrial robot. Due to the different position distance in the robot workspace, the actual load capacity of the robot will be different. Therefore, in the selection process, there is a 20% margin for robot load.
The horizontal motion range of the robot, each company will give the action range diagram of the corresponding robot, from which we can judge whether the robot is suitable for a specific application.
The weight of robot body is an important factor in the process of its selection and application. If the industrial robot must be installed on a customized machine or guide rail, then we need to know the weight of robot body to design the corresponding support.
Application of industrial robot
With the development of intelligent manufacturing, the demand of automation is increasing. Industrial robots are widely used in more and more industries. Industrial robots are integrated with various machine tools and lines to improve the efficiency and safety of production and processing.
Robot technology is a typical representative of advanced manufacturing technology and automation equipment. Intelligent industrial equipment has become the basis of global manufacturing transformation and upgrading. The integrated application of industrial machine technology and MES / WMS makes intelligent manufacturing, digital workshop and intelligent factory from concept to reality.
Editor in charge: CC