Plaatwerk Stansen: Proces, Toleranties & Ontwerp Guide

Kernpunten

• Stansen is the fastest way to produce flat and formed Plaatwerk parts at scale — cycle times as low as 1 second per part with progressive dies, making it the go-to process for brackets, clips, shields, and enclosures above 5,000 units.
• Proces choice depends on part geometry and volume — blanking and piercing for flat parts, Buigen for simple forms, progressive die for complex multi-feature parts, deep drawing for hollow shells.
• Standard Stansen Toleranties are ±0.13 mm (0.005″) for hole diameters, ±0.25 mm (0.010″) for edge-to-hole positions — tighter than laser-cut-only parts because the die controls dimensions repeatably.
• Die cost dominates at low volume — a simple single-stage die costs $800–$3,000; a progressive die with 8–12 stations runs $8,000–$25,000. Below 1,000 units, Lasersnijden + CNC Buigen is usually cheaper.
• Burr direction is a critical DFM detail — stamped edges always have a burr on one side. Specify burr direction on the drawing to avoid assembly interference.
• Materiaal choice affects both tool life and part cost — mild steel (SPCC) is the most stampable; stainless and high-strength steels accelerate die wear and need more frequent tool maintenance.

Wat is plaatwerkstansen?

Plaatwerk Stansen is a cold-forming process that uses a punch and die set in a mechanical or hydraulic press to cut, bend, or draw flat Plaatwerk into finished parts. Unlike CNC-bewerking which removes material, or Lasersnijden which only cuts profiles, Stansen simultaneously cuts and forms — producing complete parts with holes, bends, tabs, and embossed features in a single press stroke or a sequence of progressive stations.

The process is ideal for parts that are flat or shallow-formed, produced in quantities above 1,000–5,000 units, and require consistent dimensions across a long Productie run. Common stamped parts include mounting brackets, electrical contacts, spring clips, EMI shields, automotive body panels, and appliance housings.

In the world of custom plaatmetaalbewerking, Stansen fills the gap between low-volume laser-cut prototyping and high-volume dedicated Productie. A fabricator with in-house Stansen capability can offer you both prototype flexibility and Productie economics without switching suppliers mid-project.

Vier hoofdtypen van plaatwerkstansen

Best voor: Blanking when you need flat parts with precise hole patterns. Progressive die when part count exceeds 10,000 and the part has 3+ features. Deep drawing when you need hollow cylindrical or box-shaped parts.
Avoid when: Progressive die below 5,000 units — die amortization per part makes unit cost higher than laser + bend. Deep drawing for materials with low elongation (some Aluminiumlegerings crack at draw ratios above 1.8).

Stamptoleranties: wat u realistisch kunt verwachten

Toleranties in Stansen are driven by the die, not the operator — which means they are inherently more repeatable than manually positioned Lasersnijden or press brake Buigen. However, they vary significantly by feature type:

When your part has features that must locate relative to each other within a tight tolerance, specify GD&T datum references on the drawing rather than linear ± dimensions. This tells the die designer which features to use as the primary locating surfaces and which Toleranties can stack.

Best voor: Using standard Toleranties for all non-critical features — tighter Toleranties increase die cost by 20–40%. Reserve precision Toleranties for hole patterns that locate mating components, connector cutouts, and press-fit features.
Avoid when: Specifying ±0.05 mm on overall length of a 300 mm part — thermal expansion alone can shift dimensions by 0.03 mm per 10°C temperature change.

Materiaalkeuze voor gestanste onderdelen

Best voor: SPCC steel for 90% of general Stansen work — it is the most forgiving, least expensive, and longest tool-life material. 5052 aluminum when weight matters. Spring steel only when the part must function as a spring.
Avoid when: Specifying 316 stainless for a simple indoor bracket — the material premium and accelerated die wear add cost with no functional benefit over 304.

DFM-regels voor gestanste onderdelen

Good Stansen DFM reduces die cost, extends tool life, and improves part consistency. These six rules apply to nearly every stamped part:

1. Hole diameter must be at least 1× Materiaaldikte. Punching a hole smaller than the Materiaaldikte causes punch deflection and premature breakage. For a 1.5 mm steel sheet, the smallest hole is 1.5 mm diameter.
2. Space holes at least 2× Materiaaldikte from each other and from the part edge. Closer spacing causes the web between holes to distort or tear during punching. For 1.0 mm stock, keep holes at least 2.0 mm apart.
3. Inside bend radii should be at least 1× Materiaaldikte. Tighter radii risk cracking on the outside of the bend, especially with aluminum and stainless. For 5052 aluminum, use 1.5× Materiaaldikte as the minimum.
4. Keep features at least 3× Materiaaldikte from bend lines. Holes, slots, and tabs too close to a bend will distort as the material stretches. For a 1.2 mm part, keep features 3.6 mm from any bend.
5. Specify burr direction on the drawing. Every punched edge has a burr on the die side and a clean shear on the punch side. Use an arrow or note (“burr this side”) — this costs nothing but prevents assembly problems.
6. Use full-radius corners (not sharp) on blanked profiles. Sharp internal corners concentrate stress and accelerate die wear. Minimum corner radius = 0.5× Materiaaldikte for steel, 1× for aluminum.

Stampen versus lasersnijden + CNC-buigen: wanneer overschakelen

One of the most common questions from buyers is when to move from laser-cut prototypes to Stansen Productie. The decision comes down to volume, part complexity, and tolerance requirements:

The crossover point where Stansen becomes cheaper than Lasersnijden typically falls between 2,000 and 5,000 units, depending on part size and complexity. Below this volume, a good plaatmetaalbewerking shop can produce parts economically with Lasersnijden and CNC Buigen — and you avoid the upfront die investment.

Conclusie

Plaatwerk Stansen rewards volume and punishes low quantities with tooling amortization. The key to a successful Stansen project is matching the process to your part: blanking for simple flat parts, progressive die for complex high-volume components, deep drawing for hollow shells. Start with laser-cut prototypes to validate fit and function. Once your design is stable and volumes justify it, transition to Stansen for the best combination of unit cost, speed, and part-to-part consistency.