From Shipbuilding to Mechanical Equipment: The Multi-Scenario Adaptability of Riveting and Welding Processing

The core competitiveness of riveting and welding processing lies in its ability to flexibly adjust process combinations according to the mechanical requirements and environmental characteristics of different scenarios. From the hulls of 10,000-ton ships to the frames of precision machine tools, it can find suitable connection solutions, demonstrating strong scene penetration.

In the field of shipbuilding, riveting and welding processing needs to cope with the dual challenges of "heavy load + corrosion resistance". The splicing of hull decks adopts a combination of submerged arc welding and high-strength rivets: first, double-sided submerged arc welding is used to form a continuous weld to ensure watertightness, and then high-temperature alloy rivets with a diameter of 20mm are implanted on both sides of the weld, which are cold-headed and fastened by a hydraulic press, so that the tensile strength of the connected part reaches more than 500MPa. This combination can not only resist long-term seawater erosion but also bear the alternating load caused by wave impact. After this process, the deck of an ocean-going cargo ship remained structurally stable in force 10 winds and waves, and its service life was 30% longer than that of the pure welding scheme.

In the manufacturing of heavy mechanical equipment, riveting and welding processing focuses on the balance between "rigidity + shock absorption". At the stressed joints of the excavator's movable arm, CO₂ gas shielded welding is first used to complete the main connection, and then blind rivets are used to reinforce the stress concentration area. The elastic deformation of the rivets can absorb 30% of the impact energy. The splicing of machine tool beds focuses more on precision control: first, positioning pins are used to achieve millimeter-level alignment, then intermittent welding is used to reduce thermal deformation, and finally, bolts are riveted to eliminate the gap on the joint surface, so that the flatness error of the machined surface is controlled within 0.02mm/m. This "welding as the main, riveting as the auxiliary" scheme enables the equipment to withstand heavy-load cutting while maintaining operational stability.

In the field of bridge steel structures, riveting and welding processing needs to adapt to the requirements of "long span + fatigue resistance". The segmental connection of steel box girders adopts the "bolt-welding combination" process: the fillet joint between the web and the flange plate is primed with gas metal arc welding, and then a group of high-strength bolts (grade 8.8 or above) is used to apply pre-tightening force, so that the anti-slip coefficient of the friction surface reaches more than 0.45. This connection method performs particularly well in high-speed railway bridges, which can bear the fatigue load caused by the high-frequency passage of trains. After 2 million cycles of testing, the bolt pre-tightening force attenuation does not exceed 5%, which is much lower than 15% of the pure welded structure.

From the salty and humid marine environment to the violently vibrating workshop, from bridges exposed to the natural environment to precision-operating machine tools, riveting and welding processing can always find solutions matching the characteristics of the scene through fine adjustment of process parameters and innovation of connection methods. This "on-demand customization" adaptability stems from both a profound understanding of material properties and accurate prediction of failure modes in different scenarios — this is the core logic why riveting and welding processing has become the preferred process for cross-field connections.