Seamless cups, cylinders, boxes, and enclosures from flat sheet metal — no welds, no joints, consistent wall thickness, and tight tolerances.
Get a Free Quote →What Is Deep Draw Stamping?
Deep draw stamping is a sheet metal forming process where a flat blank is drawn into a die cavity by a punch to create a hollow shape — a cylinder, cup, box, or enclosure — with no welded seams. The process produces parts with excellent structural strength, consistent wall thickness, and smooth interior surfaces that are impossible to achieve with welded fabrication.
A part is considered “deep drawn” when its depth exceeds its diameter (draw ratio > 1.0). We routinely achieve draw ratios up to 2.5:1 in a single draw, and deeper ratios through multiple re-draw operations.
Deep Draw Stamping Capabilities
| Parameter | Fähigkeit |
|---|---|
| Max draw depth | 300mm single draw; 500mm+ with re-draws |
| Max blank diameter | Up to 600mm |
| Draw ratio (LDR) | Up to 2.5:1 (single); higher with annealing |
| Materialdicke | 0.3mm – 6mm |
| Diameter tolerance | ±0.05mm standard; ±0.02mm precision |
| Wall thickness tolerance | ±10% of nominal (standard) |
| Press tonnage available | 80T – 500T (hydraulic and mechanical) |
Materials for Deep Drawing
- Low carbon steel (DC01, DC04, SPCD) — most common, excellent drawability
- Edelstahl 304, 316 — corrosion resistant; requires more force and lubrication
- Aluminium 1050, 3003, 5052 — lightweight; excellent for thin-wall cans and enclosures
- Kupfer C11000 — electrical and thermal applications; excellent ductility
- Messing C26000 — plumbing, valves, decorative hardware
Deep Drawn Part Applications
Automobil
Fuel filter housings, oil pump components, airbag inflator cups, bearing races, catalytic converter shells.
Elektronik
EMI shielding cans, battery cases, relay housings, capacitor shells, speaker cups.
Medizin
Surgical instrument handles, implant housings, cartridge bodies, diagnostic device enclosures.
Consumer Products
Aerosol cans, cookware, fire extinguisher cylinders, paint cans, kitchen appliance parts.
Deep Drawing vs. Alternative Processes
| Faktor | Deep Draw | Welded Fabrication | Casting |
|---|---|---|---|
| Seams | None | Welded joints | None |
| Wall thickness | Consistent | Variable at welds | Variable |
| High volume cost | Very low | High (labor) | Medium |
| Strength | High (work-hardened) | Medium (HAZ) | Medium |
| Lead time | 20–30 days (tooling) | Short | Long (tooling) |
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Frequently Asked Questions About Deep Draw Stamping
Q: What is deep draw stamping and what types of parts is it used for?
A: Deep draw stamping is a metal forming process that transforms flat sheet metal blanks into seamless, hollow, three-dimensional shapes. The process uses a punch to force metal into a die cavity, stretching the material into deep cup-like forms. Common applications include battery cans, sensor housings, automotive oil pans, sink basins, metal cans, solenoid cases, and electrical enclosures.
Q: What is the maximum draw depth you can achieve?
A: We achieve draw depths up to 300mm (12 inches) with depth-to-diameter ratios exceeding 2:1. For multi-stage deep drawing with intermediate annealing, even greater depths are possible. The maximum draw depth depends on the material’s ductility, thickness, and part geometry — our engineering team evaluates feasibility during the DFM review.
Q: What materials work best for deep drawing?
A: Materials with high ductility and elongation work best: aluminum 1100 and 3003, cold-rolled steel grades 1008 and 1010, deep-drawing quality (DDQ) steel, stainless steel 304 (with proper lubrication), copper (C11000), and brass (C26000). We select material grade based on the draw ratio, wall thickness requirements, and end-use environment.
Q: How is deep draw stamping different from regular sheet metal stamping?
A: Unlike standard stamping (which primarily cuts and bends), deep drawing plastically deforms the material by stretching it into a die cavity under controlled blank holder pressure. This creates seamless hollow parts in a single operation without welding. The process requires specialized draw dies with precise punch-to-die clearance, optimized lubricants, and careful control of blank holder force to prevent wrinkling or tearing.
Q: What is the typical tooling lead time for deep draw stamping dies?
A: Deep draw tooling lead time is 25–35 days for single-stage draws and 30–45 days for multi-stage progressive draw dies. This includes 3D die design in SolidWorks, material selection, CNC machining, wire EDM, heat treatment, assembly, and tryout. Rush tooling options (15–20 days) are available for time-critical projects with surcharge applied.