Secondary Production Service
After stamping operations are completed, a component’s readiness for real-world application largely depends on how well secondary processes are planned, integrated, and controlled. At Kun Feng, secondary production is not treated as a collection of isolated operations, but as an integrated manufacturing support framework developed according to functional requirements, assembly needs, and mass-production conditions.
Through structured process classification and coordinated execution, stamped parts are transformed into ready-to-use components, sub-assemblies, or deliverable units, while maintaining consistency and stability under long-term production conditions.
Tapping, Drilling & Machining
For stamped parts requiring localized functional features or enhanced dimensional accuracy, tapping, drilling, and various machining operations can be integrated based on part design requirements.
In practice, these operations are not limited to CNC machining alone. Depending on part geometry, hole layout, and production volume, CNC milling machines, lathes, multi-spindle drilling machines, tapping machines, or dedicated processing equipment may be applied to balance efficiency, precision, and cost effectiveness.
Regardless of equipment selection, the primary objective is to achieve surface correction, slot machining, hole accuracy enhancement, or functional feature refinement, ensuring dimensional stability for subsequent joining, assembly, or surface treatment processes.
Structural Joining Processes
Structural joining methods vary according to product design and application requirements. Common approaches include self-joining methods utilizing the base material itself, such as press-fitting or riveting, as well as externally applied joining processes such as TIG welding (with or without filler material), spot welding, or brazing.
For each project, joining methods are selected based on material characteristics, structural strength requirements, and production conditions to ensure mechanical reliability and controlled process performance.
Functional Inserts & Fastener Installation
To support downstream assembly and functional requirements, functional inserts such as nuts, studs, and threaded fasteners can be installed through press-in or riveting processes, allowing stamped parts to incorporate fastening and positioning functions directly.
These processes are commonly applied to mechanical components, hand tools, and bicycle parts, and are also widely used in electronic components, AI server chassis, equipment enclosures, and related structural assemblies, contributing to improved assembly efficiency and reduced downstream handling.
Surface Treatment & Post-Processing Integration
Surface treatment selection is driven not only by appearance, but by operating environment, corrosion resistance requirements, wear conditions, and downstream assembly considerations. During project evaluation, actual service conditions are reviewed first, followed by selection of surface treatments that are both functionally appropriate and suitable for stable mass production.
Prior to primary corrosion-protection or functional treatments, necessary pretreatment steps—such as degreasing and surface cleaning—are applied to ensure surface conditions meet downstream process requirements.
In addition, depending on appearance, functional, or assembly needs, surface finishing performed by mechanical methods—such as deburring, brushing, grinding, polishing, or sandblasting—may be integrated as independent surface processing steps to improve surface quality and consistency.
For steel components, commonly applied treatments include black oxide, zinc phosphate, or other phosphate coatings, providing baseline corrosion protection and compatibility with subsequent coating or lubrication processes. These treatments are widely used in hand tools and bicycle components.
Plating and coating options are selected based on application requirements and may include zinc-based coatings, nickel-based coatings (including electroless nickel), powder coating, or liquid painting. For aluminum components, anodizing or trivalent chromate conversion coatings can be applied to enhance corrosion resistance, surface stability, and environmental compliance. For copper and copper-alloy components, gold or silver plating may be selected to meet electrical conductivity or functional contact requirements, commonly used in electronic and electrical applications.
For applications requiring enhanced corrosion resistance, zinc flake coatings such as Dacromet or Geomet may be applied. In more demanding environments, hot-dip galvanizing or combined solutions such as e-coating followed by powder coating can be evaluated.
Where improved mechanical properties, wear resistance, or service life are required, additional processing may be integrated and broadly classified into heat treatment and thermochemical treatment categories. Heat treatment is commonly performed using vacuum furnaces or continuous furnaces to enhance overall mechanical performance and production consistency. Thermochemical treatments such as carburizing or salt bath nitrocarburizing are applied to improve surface hardness and wear resistance. Actual process selection and conditions are evaluated based on material properties and application requirements.
Where identification, traceability, or branding is required, laser marking, screen printing, or other marking processes may also be integrated to support downstream assembly and supply-chain management.
For projects involving surface treatments not listed above or customer-specified standards, requirements can be reviewed during project evaluation to determine suitable processing solutions and implementation feasibility.
Assembly & Sub-Assembly Delivery
Depending on project requirements, part assembly or sub-assembly delivery can be provided to reduce downstream assembly workload, simplify supply-chain management, and improve delivery efficiency. By integrating stamping, secondary processing, and post-processing operations, delivered parts maintain consistent quality and traceable production records.
Integrated Processing as Manufacturing Value
The value of secondary processing lies not only in individual operations, but in the ability to execute and integrate them consistently under mass-production conditions. Through structured process planning and disciplined manufacturing management, Kun Feng supports customers in reducing production risk, improving process stability, and establishing manufacturing solutions suitable for long-term operation.