Dongfeng VR kingrun Bottom Plate Welding Assembly 5100010-C1100

Built to withstand the extreme static and dynamic loads of underbody components (e.g., supporting auxiliary equipment, cargo weight transfer), the assembly features a robust welding structure with premium materials. The base plate uses 12mm-thick Q355B low-alloy steel (yield strength 355 MPa) for core load-bearing, while reinforcing ribs (8mm-thick Q355B) are welded at 200mm intervals to enhance rigidity. All welds are robotic MIG welds with a throat thickness of ≥6mm, passing ultrasonic non-destructive testing (NDT) to ensure no internal defects. Finite Element Analysis (FEA) testing confirms it can handle a static load of 30,000N (well above the VR kingrun’s underbody component load of 22,000N) without permanent deformation, and endure 200,000+ cycles of dynamic vibration (simulating rough roads) without weld cracking. Unlike weakly welded plates that warp under load, this high-strength design ensures stable underbody support throughout the truck’s service life

Engineered to serve as a flexible underbody mounting platform for the Dongfeng VR kingrun, the assembly features a multi-hole and reinforced mounting layout. It includes 16 standardized mounting holes (M16 threads) distributed along the frame rail edges for securing auxiliary components (e.g., tool boxes, AdBlue tanks, battery packs). Four rectangular cutouts (200mm×150mm) with reinforced flanges (10mm-thick) accommodate underbody pipelines (fuel, hydraulic) and wiring harnesses, preventing component interference. A 50mm-deep recessed area in the center (reinforced with 15mm-thick steel) provides a dedicated mounting zone for heavy equipment (e.g., air compressors), with pre-welded nuts for quick attachment. Unlike single-purpose bottom plates that limit component placement, this multi-functional design reduces the need for custom brackets, simplifying underbody configuration for fleet operators

Designed to resist corrosion from road salt, mud, and moisture (critical for underbody components), the assembly undergoes a four-stage anti-corrosion treatment. First, a shot blasting process (Sa 2.5 standard) removes surface rust and contaminants, creating a rough texture for coating adhesion. Next, a zinc phosphate conversion coating (80μm thickness) forms a corrosion-resistant base, followed by an electrophoretic primer (100μm) that seals against moisture. Finally, a thermosetting polyester topcoat (70μm, RAL 7035 gray) is applied to resist chipping, fading, and chemical damage from diesel or road deicers. This coating system passes 1,500 hours of neutral salt spray testing (equivalent to 12 years of road salt exposure) without rust or coating peeling. All mounting holes are tapped with precision threads and coated with anti-seize compound to prevent thread corrosion, ensuring easy bolt removal during maintenance

Designed for hassle-free replacement by fleet technicians, the assembly simplifies installation with precision-machined features and user-friendly design. All mounting holes are drilled to H8 tolerance (ensuring perfect bolt fit) and deburred to avoid damaging bolt threads or chassis components. Four laser-etched alignment marks on the plate’s top surface line up with reference points on the VR kingrun’s chassis frame rails, eliminating guesswork and reducing installation time by 50% (typically 45–60 minutes). The package includes all necessary hardware: 16 M16×50mm high-tensile bolts, lock washers, and rubber gaskets (pre-cut to fit mounting holes for vibration damping). Installation steps are straightforward: clean the chassis mounting surface, align the plate’s marks with the frame rails, secure the bolts to the specified torque (180 N·m), and attach underbody components to the pre-drilled holes. Each unit undergoes dimensional verification via CMM, load testing, and coating adhesion checks, backed by a 48-month warranty against defects (e.g., warping, weld failure, coating peeling)