[ Manufacturing process ]
Cold forging production process
Micro factory
A “factory within a factory,” the Micro Factory system provides both superior quality and cost competitiveness.
The square welding nut features a square-shaped body designed for welding applications.
Our Micro Factory integrates the entire process — raw material → forging → thread rolling & tapping → washing → inspection/packaging — into a single smart production cell.
This unified line eliminates contamination or defects that may occur during material transfer between processes and maximizes productivity through full automation.
As a result, we deliver higher quality reliability and cost competitiveness to our customers.
Thread forming (tapping) methods
| Process | Cutting | Thread Rolling |
|---|---|---|
| Advantages | Capable of machining various nut diameters | Possible to integrate/automate processes |
| Uniform thread shape | Excellent productivity (48% faster production speed) | |
| Lower tool cost (about 50% of cutting tap price) | Superior fatigue and wear resistance | |
| Disadvantages | Generates cutting chips | Vulnerable to tool wear |
| Requires chip removal process | Nut size limitation (Ø10 or smaller) | |
| High material loss | Uneven thread shape |
Technology Overview
The thread rolling tapping process forms internal nut threads through plastic deformation, achieving higher productivity and better mechanical properties of threads compared to cutting processes. This method enhances both cost efficiency and product quality competitiveness.
Weld Nut Manufacturing Method (Patent No. 10-2011-0008475)
Technology Overview
The flange part is forged from a round blank cut on both sides, preventing material waste caused by scrap. This weld nut manufacturing method simplifies machining steps and enables the production of weld nuts solely through forging. Since no scrap is generated from the flange during pressing, material costs are reduced, and fewer process steps lead to increased working speed.