What are the design requirements for a power assisted robotic arm? At present, the power assisted manipulator is used in many fields, such as automobile manufacturing, chemical materials and other industries. What are the design requirements for a power assisted robotic arm? Let’s take a look together!
1. The power assisted robotic arm should have high load-bearing capacity, good stiffness, and light self weight
The stiffness of the assistive robotic arm directly affects the stability, speed, and accuracy level of the robotic arm when grasping the product workpiece. Poor stiffness often leads to bending of the robotic arm in the vertical plane and lateral torsion deformation in the plane, which may cause vibration or cause the workpiece to become stuck and unable to work. Therefore, power assisted robotic arms generally use materials with good stiffness to increase the bending stiffness of the arm, and the stiffness of each support and connection component also needs to have certain requirements to ensure that it can withstand the required driving force.
2. The relative speed of the power assisted robotic arm should be appropriate and the inertial force should be low
The relative speed of the power assisted robotic arm is generally determined by the production rhythm of the product, but it cannot blindly pursue high-speed operation. The mechanical arm moves from a resting state to a normal relative speed for operation, and from a constant speed drop to a stop without movement for the braking system. The entire process of speed change is a rate characteristic parameter. The mechanical arm has a light weight and its stability in starting and stopping is sufficient.
3. Assist the robotic arm to move flexibly
The structure of the power assisted robotic arm needs to be compact and exquisite in order to make the robotic arm move quickly and flexibly. In addition, the cantilever assisted robotic arm also needs to consider the layout of the parts on the robotic arm, which is to calculate the net weight of the robotic arm after moving the parts, focusing on the torque of the rotation, adjustment, and support point center. Focusing on torque is very detrimental to the movement of the robotic arm. Focusing on excessive torque can also cause the robotic arm to move, and during adjustment, it can also create a sinking head condition. It also affects the ability to coordinate movement, and in severe cases, the assist robotic arm and upright pole may get stuck. Therefore, when planning a robotic arm, it is important to ensure that the center of gravity of the arm is centered around the center of rotation. Or it should be as close to the center of rotation as possible to reduce the deviation torque. For power assisted robotic arms that operate simultaneously with both arms, it is necessary to ensure that the arrangement of the arms is as symmetrical as possible to the core to achieve balance.
4. High assembly accuracy
In order to achieve relatively high assembly accuracy of the power assisted robotic arm, in addition to adopting advanced control measures, the structural type also pays attention to the bending stiffness, torque, inertia torque, and buffering actual effects of the power assisted robotic arm, which are directly related to the assembly accuracy of the power assisted robotic arm.
Post time: May-18-2023