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Resistance Weld Spec Table
Resistance Weld KS Specifications — 2 sizes
KS B ISO 2553
Resistance weld symbols for spot, seam, and projection welding using electrical resistance heat.
Practical Notes
- Spot welding is the most common type. Over 80% of automotive body assembly uses spot welding.
KSResistance Weld
2 sizes| Name | Type | Symbol | Description | Dimension | Note |
|---|---|---|---|---|---|
| Spot Weld | ResistanceWeld | ○ | Spot Weld, Resistance | Joint | |
| Seam Weld | ResistanceWeld | ⊖ | Continuous Resistance Weld | Seam Width | Airtight Joint |
Key Features
- Spot, seam, and projection—3 types joined by electrical resistance heating under pressure; no filler needed
- Spot symbol: circle with cross; quantity and pitch specify weld point layout
- Automation-friendly; robot spot guns can join multiple points per second at high speed
Key Applications
Automotive body assembly (spot), fuel tank sealing (seam), nut joining (projection), appliance sheet metal, electronics cases
FAQ
What is spot weld pitch (spacing) criterion?
Typically 15–20× sheet thickness as minimum pitch. E.g., t1.0mm→15–20mm pitch. Too close causes current shunting and poor weld quality.