Breaking Technical Barriers in V3 Infusion Needle Tip Forming

Forming thin-walled, micro-orifice needles has long plagued precision manufacturing. Traditional drilling creates rough bores, burrs, and heat-affected hardening, leading to clogs when dispensing viscous oils. The V3 Infusion Needle manufacturer discarded conventional methods, pioneering a two-die rotary swaging and laser welding combination that elevates domestic needle production to new heights.

Historically, dual-orifice tips relied on drilling, which generates frictional heat, induces work hardening, and leaves rough interiors that polishing cannot rectify. Viscous extracts adhere to these surfaces, causing blockages that force operators to replace needles every 1–2 months. Through extensive R&D, the manufacturer adopted cold swaging. High-frequency die hammering plastically deforms the tube, extruding the dual orifices without cutting tools. The result is a smooth, work-hardened bore with optimized grain flow, stabilizing hardness at HRC 22–25 and boosting toughness and wear resistance.

Integrating the tip with the hex base presented another hurdle. The base, machined on the Citizen L12-1M7 to ASME standards, requires absolute dimensional stability. Traditional TIG welding distorts the heat-sensitive hex structure. In contrast, focused laser welding creates a metallurgical bond with a minimal heat-affected zone, preserving thread integrity. Subsequent laser etching provides permanent identification for traceability.

Finishing processes follow: ASTM B912 electropolishing refines the surface, citric passivation enhances corrosion resistance, and ultrasonic cleaning ensures purity. This innovative process chain extends service life by over 60%, reduces clogging rates to below 2%, and maintains ±0.01 mm tolerances across batches. While domestic peers cling to outdated drilling, the V3 manufacturer's investment in high-end swaging technology demonstrates that equipment upgrades and process innovation are the engines of long-term growth, closing the gap with global leaders.