Mechanical performance research of friction stir welding robot for aerospace applications

Abstract

The friction stir welding robot for aerospace applications developed by the research group is subject to the effects of size, working conditions, and other conditions during the operation. The load conditions of the friction stir welding robot are harsh, and the strength and stiffness tests of the whole machine need to be carried out. Five typical working conditions of the friction stir welding robot are analyzed. By analyzing the system composition and configuration of the robot, the loading conditions of the robot stirring head during the welding process are accurately simulated, and this is used as the stiffness and strength check. The boundary conditions of the robot are simulated and analyzed under typical working conditions. The results show that the data of each part of the robot under load are obtained for a given size of the rocket cap welding. After analysis, the maximum normal displacement of the friction stir welding robot reached 0.6424 mm and the maximum stress was 79.21 MPa under the condition of melon flap welding.

Effect of friction stir welding tool hardness on wear behaviour in friction stir welding of AA-6060 T66

“…FSW has already been implemented in a number of industries, such as automotive, 2 e-mobility, 3 shipbuilding 4 and aerospace. 5…”

“…FSW has already been implemented in a number of industries, such as automotive, 2 e-mobility, 3 shipbuilding 4 and aerospace. 5 The functional element in FSW is a rotating tool consisting of a shoulder and a probe. 6,7 During welding, the rotating tool plunges into the workpiece under axial force F z and generates frictional heat.…”

Improving Machining Accuracy for a Robotic Arm with Hybrid Kinematic Chains Based on Deformation Characteristics

“…According to Equations (3)(4)(5)(6), in addition to analysis the deformation influence coefficient, reducing the deformation of the components which has weak stiffness is another way to improve the machining accuracy. A comparative experiment is designed that Thomson PC25 series linear electric cylinder is selected to replace the original BXTL150 electric cylinders, as shown in the Figure 7.…”

“…In addition, the limitation of parallel-structured robots (such as Exechon and Tricept) is their restricted workspace, although they have better stiffness. Luo et al [3] proposes a heavy-load and high-precision friction stir welding robot for welding large and complex thin-walled aluminum alloy 7075 surfaces. Xu et al [4] designed a novel six degrees-of-freedom (DOF) hybrid kinematic machine for polishing.…”

Robust Sliding Mode Fuzzy Control of Industrial Robots Using an Extended Kalman Filter Inverse Kinematic Solver

“…Precision of the factory elements is a primary issue that must be improved to increase manufacturing performance [6,7]. Industrial tasks on a factory floor, such as object handling [8] and manipulation [9], require ahigh level of precision while maintaining safe operation. Industrial robots are serial architectures, with several joints making up their construction.…”