Performance characteristics and main technical parameters of industrial robots, Performance characteristics of industrial robots
1. Degree of freedom is the main index to measure the level of robot technology. The so-called degree of freedom refers to the independent motion of moving parts relative to a fixed coordinate system. Each degree of freedom requires a servo axis to drive, so the higher the number of degrees of freedom, the more complex the actions that the robot can complete, the stronger the versatility, and the wider the application range, but the greater the corresponding technical difficulty. Generally, general industrial robots have 3-6 degrees of freedom.
2. Workspace refers to the space range in which a robot can work with its gripper. The wrist reference point describing the workspace can be selected from the center of the hand, the center of the wrist, or the fingertips of the fingers. The size and shape of the workspace vary with the reference point. The workspace of a robot depends on the structure of the robot and the range of motion of each joint. Workspace is an important performance index of industrial robot, and it is also an important index of designing industrial robot mechanism.
3. Bearing capacity Bearing capacity refers to the maximum weight borne by the robot in any position within the working range. The size of the bearing capacity depends on the mass of the load, the speed of operation and the size and direction of the acceleration. According to the different bearing capacity, industrial robots can be roughly divided into: ① micro robots - the bearing capacity is below 10N; ② Small robot - bearing capacity 10-50N; ③ Medium sized robot - bearing capacity 50-300N; ④ The carrying capacity of large robots is 300-500N; ⑤ Heavy duty robot with a bearing capacity of more than 500N.
4. Motion speed The motion speed affects the working efficiency and motion period of the robot, which is closely related to the gravity and position accuracy extracted by the robot. When the speed is high, the dynamic load borne by the robot will increase, and it will certainly bear greater inertial force during acceleration and deceleration, which will affect the stability and position accuracy of the robot. As far as the current technical level is concerned, the maximum linear motion speed of general-purpose robots is mostly below 1000mm/s, and the maximum rotation speed generally does not exceed 120 °/s.
5. Position accuracy is another technical index to measure the working quality of robot. The position accuracy of industrial robots includes positioning accuracy and repetitive positioning accuracy. The positioning accuracy depends on the position control mode and the accuracy and stiffness of the robot's moving parts. In addition, it is closely related to the factors such as gravity extraction and motion speed. Repetitive positioning accuracy refers to the accuracy of a robot's repeated positioning of a certain position. The positioning accuracy of typical industrial robots is generally within the range of 0.02mm~± 5mm.
Technical parameters of industrial robots
1. Robot load
Load refers to the maximum weight that a robot can bear when working. If you need to buy a palletizing robot, you need to calculate the weight of the goods and the weight of the robot gripper into the load. The weight of the goods is 250 kg, and the required weight of the gripper is 15 kg. For example, you can choose the BORUNTE palletizing robot model BRTIRPZ3030B, which has a load of 300 kg.
2. Repeated accuracy
The choice of this parameter also depends on the application. Repetition accuracy refers to the accuracy/difference of the robot reaching the same position after completing each cycle. If the robot is used to manufacture circuit boards, you need a robot with ultra-high repeatability. If the application accuracy requirements are not high, then the robot's repeatability can also be less high. For example, precision is usually represented by "±" in 2D view. In fact, since the robot is not linear, it can be located anywhere within the tolerance radius.
3. Robot arm span
When selecting a robot, you need to know the arm span of the robot, that is, the maximum distance that can be reached. The selection of robot should not only focus on the load, but also on its maximum motion range. Each company will give the robot’s motion range, from which you can see whether it meets your application needs. The maximum vertical motion range refers to the range between the lowest point (usually lower than the base of the robot) and the highest point that the robot wrist can reach. The maximum horizontal motion range refers to the distance between the farthest point that the robot wrist can reach horizontally and the center line of the robot base. You also need to refer to the maximum action range (expressed in degrees). These robots with different specifications are very different, and there are restrictions on some specific applications.
4. Robot weight
Robot weight is also an important parameter for designing robot units. If an industrial robot needs to be installed on a customized workbench or even rail, you need to know its weight and design the corresponding support.
If you think that the robots on the market today are not suitable for the work you need them to do, you can tell us your needs, and we can design and improve them for you according to your actual situation until you are satisfied.
5. Speed
Speed is different for different users. It depends on when the work needs to be completed. The specification table usually only gives the maximum speed, and the speed that the robot can provide is between 0 and the maximum speed. The unit is usually degrees per second.