Stud welders attach studs, pins and anchors to plate or sections in a single operation — no drilling, tapping or riveting, and almost no marking on the reverse face. It is an extremely productive operation in structural steel, shipbuilding, bridges, curtain wall, automotive and appliance sheet metal. Icyrobot supplies both capacitor discharge (CD) and inverter drawn-arc stud welding systems.
Product Center
/ Product
Contact Us
/ contact us
Icyrobot Welding & Cutting Equipment Co., Ltd.
Service Hotline: +86-10-61805655 / +86-17268660088
Email: lcy@lcyrobot.com
R&D Centre: Suite 1110, Zeyang Tower, 166 Fushi Road, Shijingshan District, Beijing
Production Base: 1/F, Block 6, Future Sci-Tech City, 165 Yuxiang Street, Luancheng District, Shijiazhuang
Stud Welder
-
Capacitor Discharge Stud WelderCapacitor-discharge stud welder for thin-plate fastening. 100V charging, 800J stored energy, adjustable 1–3ms…Learn More
-
Arc Stud Welding MachineInverter arc stud welding machine using digital soft-switching inverter technology, giving small size and low…Learn More
Choosing between the two processes
| Factor | Capacitor discharge (CD) | Drawn arc |
|---|---|---|
| Weld time | 1–5 ms | 100–1 500 ms |
| Plate thickness | Thin (from 0.5 mm), almost no reverse marking | Medium and thick (typically ≥ 3 mm) |
| Stud diameter | Mainly M3–M10 | M6–M24 and larger |
| Parent metal condition | Needs conductivity; coated and galvanised sheet acceptable | Rust and coatings must be removed |
| Penetration | Shallow | Deep, high joint strength |
| Typical use | Appliance panels, enclosures, decorative parts | Structural shear studs, bridge connectors, shipbuilding |
Products
- Capacitor discharge stud welder — for thin sheet where the reverse face must stay clean; fast and low distortion;
- Inverter arc stud welder — for medium and heavy structural members and load-bearing shear connectors.
Three process controls that decide quality
- Cleanliness of stud tip and parent surface. Oil, rust and coatings cause lack of fusion and spatter directly.
- Parameters and lift height. Lift sets the arc length: too long gives porosity, too short short-circuits.
- Gun perpendicularity and plunge force. A tilted gun causes one-sided fusion — the leading cause of site rework.
Finished joints are normally verified by visual inspection plus a 30° bend test or torque test; for batch site work, inspect first-off each shift.
Frequently asked questions
Can stainless studs be welded to carbon steel plate?
Yes — it is a dissimilar-metal joint, so parameters and possibly a transition layer must be qualified; for load-bearing joints run a procedure qualification first.
Can I weld on galvanised sheet?
CD welding can, but zinc vaporisation brings fume and porosity risk: increase ventilation and adjust parameters. For drawn arc, grind the zinc off locally first.
How is joint strength assured?
Drawn-arc joints are normally stronger than either the stud or the parent metal, so fracture in the base metal counts as a pass. Verify by visual inspection plus bend or tensile testing.
For batch-construction selection and procedure qualification, contact us.
Frequently Asked Questions
Capacitor discharge or drawn arc?
CD for thin sheet, no reverse marking and M3-M10 studs; drawn arc for medium plate, load-bearing shear connectors and M6-M24 or larger, with deeper penetration.
Can I weld on galvanised sheet?
CD welding can, but zinc vaporisation brings fume and porosity risk — increase ventilation and adjust parameters. For drawn arc, grind the zinc off locally first.
How is joint strength verified?
Normally visual inspection plus a 30 degree bend test or torque test. Drawn-arc joints usually exceed the stud or parent metal, so fracture in the base metal counts as a pass.