大厚度一体式铝合金车钩座板模具设计、型材挤压及应用进展OA

Based on the existing form and contour dimensions of fusion-welded and friction-stir-welded coupler seat plates,a large-section,thick-gauge monolithic aluminum alloy coupler seat plate profile was successfully developed through forward extrusion using a large front-loading extrusion press(160MN).Comprehensive evaluations were conducted on the large-section,thick-gauge monolithic coupler seat plate profile,including chemical composition analysis,microstructure characterization,and dimensional inspection,welding performance assessment,mechanical property testing,fatigue resistance testing,corrosion resistance evaluation and low-temperature performance testing.The results show that the performance of this profile met the requirements of TB/T 3260.4 for aluminum alloy profiles with a thickness of t≤25mmn and satisfied the needs for mass industrial production.Comparative analysis of the mechanical properties of fusion-welded coupler seat plate,friction-stir-welded coupler seat plate,and the large-section thick-gauge monolithic aluminum alloy coupler seat plate revealed that the extruded monolithic large-section,thick-gauge monolithic aluminum alloy coupler seat plate exhibits design redundancy,enabling further thinning of the coupler seat plate to achieve maximum weight reduction in the car body structure.