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Many purchasers face troubles with no in-house design team, drawing modification costs and structural unreasonable problems at the early product development stage.
✅ At SunJun Hardware, you only need to inform us your product installation size, assembly function, application scenario and performance requirements; our senior sheet metal engineering team will provide 100% FREE structural drawing design, scheme optimization and DFM manufacturability analysis.
✅ No drawing preparation work required from your side, we complete sketch → detailed dimension drawing → structural rationality check → production drawing output independently, greatly cutting your R&D cycle, drawing outsourcing expense and trial & error risks.
✅ We support drawing revision and optimization for multiple rounds until matching your assembly demands perfectly.
Solve Thin Plate Bending Springback & Component Deformation Defect
Thin-gauge sheet metal used for baffles and precision structural parts is prone to obvious springback after bending, resulting in uneven flatness, inconsistent assembly gaps and dimensional out-of-tolerance. SunJun Hardware adopts customized springback compensation mold design + segmented positioning bending process, strictly controls bending angle tolerance within ±0.12°, ensures flatness uniformity of baffles, cabinet panels and structural frames, eliminates warpage defects during mass production and improves finished product assembly yield significantly.
Eliminate Position Deviation & Spacing Error in High-Volume CNC Punching
Mass production of multi-hole baffles and mounting accessories often suffers inconsistent hole spacing, offset mounting holes, leading to secondary drilling during customer assembly. We adopt unified fixture positioning + program-locked coordinate benchmark for punching & laser cutting, keep hole position tolerance within ±0.2mm, guarantee interchangeability of spare parts and greatly boost your on-site assembly efficiency.
Control Cumulative Tolerance for Multi-Part Assembled Cabinet & Structural Assemblies
Complete cabinets and intelligent equipment structural assemblies consist of multiple baffles, brackets and panels; accumulated machining deviation always causes assembly jamming and poor fitting. We implement first-article 3D full-coordinate inspection, unified positioning standard for every working procedure to lock tolerance chain, guarantee component interchangeability, simplify your final assembly work and lower product rejection rate.
Resolve Welding Thermal Deformation, Weld Pits & Uneven Seam for High-Appearance Enclosure Parts
Exposed cabinet shells and precision structural components require excellent exterior flatness; traditional welding easily triggers thermal deformation, pits and rough welding traces, affecting appearance and assembly precision. We deploy pulse precision TIG / laser welding + subsequent fine grinding & deburring treatment, minimize heat-affected zone distortion, realize nearly invisible welding seams, reduce rework rate after surface treatment and meet high cosmetic & precision standards for industrial & communication equipment.
Optimize Surface Treatment to Prevent Coating Bubbling, Peeling & Corrosion
Cut edges and welding seams are vulnerable to poor paint adhesion, rusting and coating peeling for long-term use. SunJun Hardware implements complete pre-treatment workflow: Degreasing → Derusting → Phosphating → Passivation before electrostatic powder coating, effectively enhancing coating adhesion; finished products pass 500-hour salt spray test, adapting to indoor and mild outdoor working environments for cabinets and structural parts.
