Key Technical Points of High-Strength Riveting and Welding Fabrication: Material Adaptation and Process Upgrade Solutions

With the continuous improvement of strength requirements for structural components in fields such as construction machinery, rail transit, and aerospace, the application of high-strength riveting and welding fabrication technology has become increasingly widespread. Its core lies in achieving high load-bearing and fatigue-resistant performance of structural components through scientific material adaptation and precise process upgrades. This article decomposes the key technical points of high-strength riveting and welding fabrication from two core dimensions: material adaptation principles and process upgrade solutions.

Material adaptation is the basic premise of high-strength riveting and welding fabrication, which needs to take both material characteristics and connection requirements into account. For high-strength steel (such as Q960, NM450), high-strength rivets and low-hydrogen welding materials should be matched to avoid the connection part becoming a weak stress point due to mismatched material strength; for lightweight and high-strength materials such as aluminum alloy and titanium alloy, special rivets and inert gas shielded welding processes should be selected to reduce the impact of oxidation on connection strength. At the same time, it is necessary to verify the mechanical performance parameters of the materials in advance to ensure that their tensile strength, yield strength and other indicators meet the processing requirements, so as to ensure the quality of riveting and welding from the source.

Process upgrade is the core path to improve the quality of high-strength riveting and welding fabrication. In the riveting process, upgraded processes such as hydraulic riveting and self-piercing riveting can be adopted to replace traditional manual riveting, ensuring uniform rivet clamping force and improving connection stability; in the welding process, advanced technologies such as narrow gap submerged arc welding and laser welding can be introduced to reduce heat input, minimize welding deformation, and avoid welding defects such as cracks. In addition, it is necessary to optimize the processing flow, control workpiece deviation through precision positioning tooling, and strengthen auxiliary processes such as pre-welding preheating and post-welding heat preservation to further improve the comprehensive mechanical properties of riveted and welded joints.

It should be noted that high-strength riveting and welding fabrication also requires supporting strict process control, including raw material incoming inspection, real-time monitoring of process parameters, and post-welding non-destructive testing. Only by combining material adaptation, process upgrade and quality control can the advantages of high-strength riveting and welding technology be fully exerted, providing reliable connection guarantees for structural components in high-demand scenarios.