Topological optimization design method for stand column structure of friction stir welding robot

Abstract

The invention relates to the field of structural analysis of friction stir welding robots, in particular to a topological optimization design method for a stand column structure of a friction stir welding robot, which comprises the following steps of: 1, dynamically optimizing the stand column structure; 2, optimizing the load and boundary conditions of the stand column structure; 3, realizing topological optimization analysis of the stand column structures: firstly, carrying out three-dimensional modeling, carrying out mesh generation on a stand column model after modeling, then applying loadvalues under different working conditions to the model, carrying out topological optimization respectively, carrying out weighted optimization analysis on the stand column structures after topological optimization, and obtaining a final optimization result; and 4, reasonably configuring the stand column structure according to the obtained topological optimization analysis result of the stand column structure. According to the method, optimization design is carried out on the stand column structure firstly, then a new round of topological optimization correction design is carried out on the stand column structure again according to the optimized structure, and therefore the light-weight stand column structure with the excellent comprehensive dynamic performance is obtained.

Description

technical field [0001] The invention relates to the field of structural analysis of a friction stir welding robot, in particular to a topology optimization design method for a column structure of a friction stir welding robot. Background technique [0002] Friction stir welding technology is a new type of continuous solid-phase joining technology. Once it appeared, it caused a great sensation in the field of welding. It is considered to be the most attractive and potential joining technology since the advent of laser welding. Due to the unique advantages of friction stir welding itself, more and more scientific research institutions are attracted to enter into the research work in this field, which makes the friction stir welding technology develop rapidly. [0003] At present, domestic and foreign research on friction stir welding mainly focuses on the friction stir welding process of different materials and the mechanical properties of the joint structure, the flow behavio...

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Problems solved by technology

At present, the base, column, saddle and other large parts of the robot are mainly made of gray cast iron for casting processing, and the main load-bearing structural parts such as the ram, and because of its cantilever structure, alloy steel is used for welding to ensure that the whole machine The rigidity of the robot, except for the turntable, the mass of the whole robot weighs about 71 tons, and the outer envelope size of the whole machine is about 1.8m×1.8m×1.6m, which needs to be reduced, and the welding speed and rotation during friction stir welding Speed, downward pressure, axial pressure, torque, etc. will all affect the welding process, and then affect the welding quality. For example, during the friction stir welding process, the stirring head is under a large force, which may easily cause structural deformation of the welding equipment and lead to deviations in the welding position. , so while reducing the weight of the equipment, it is necessary to optimize the structure to ensure the overall rigidity of the equipment

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