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Forging dies are precision tooling systems that shape metal through controlled pressure. In closed die forging, matched upper and lower dies contain shaped impressions that form the final part geometry. These dies must withstand repeated cycles of extreme force, thermal shock, and abrasive wear while maintaining dimensional accuracy over thousands of operations.

At Setforge, we handle the complete tooling lifecycle internally, from concept and FEM simulation through CNC machining and production validation. This integrated approach gives us direct control over die performance, lead times, and the ability to optimize tooling for our specific processes and materials.

CLOSED DIE FORGING TOOLING

Closed die forging uses matched dies where both halves contain shaped cavities. The heated workpiece is placed between the dies, and when the press closes, metal flows to fill the impressions. A controlled amount of excess material flows into a flash gutter at the parting line. This flash cools quickly and creates back-pressure that forces metal into all die details.

The dies need several key features. Draft angles (optimized for process and material compatibility) allow part release. Fillet radii promote metal flow and reduce tool wear, sharp corners create stress concentrations that lead to premature failure.

Closed die forging requires upfront tooling investment but offers low recurring costs per part. This makes it economical for medium to high production volumes, typically starting around 500-1,000 parts depending on complexity.

COMPLETE IN-HOUSE CAPABILITIES PROCESS

Our integrated tooling operation covers the entire die lifecycle without external suppliers. This gives us direct control over quality, timing, and the ability to optimize dies based on production feedback.

Complete tooling autonomy means faster project launches, better die optimization, and greater flexibility for design changes. We're not dependent on external die shops, our forging and tooling teams work directly together to deliver optimal results.

DESIGN &
SIMULATION

CAD modeling and FEM simulation predict metal flow, identify potential defects, and optimize die geometry before cutting any steel. Simulation reveals high-stress areas, allowing reinforcement before production.

1

DIE
MANUFACTURING

CNC machining works directly in hardened H13, eliminating heat treatment distortion. EDM handles complex features (deep slots, sharp corners, or intricate textures) in fully hardened tool steel.

2

VALIDATION &
OPTIMIZATION

New dies undergo sampling trials on production presses. We inspect dimensions, check for defects, and make adjustments immediately using in-house equipment.

3

UNDERSTANDING MATERIAL-SPECIFIC REQUIREMENTS

Different forging materials place different demands on tooling. Forging temperature, thermal conductivity, and material strength all influence die design, preheat requirements, and expected tool life.

Understanding these material-specific needs is critical for die optimization and production planning.

STEEL FORGING

Forging at 1,050-1,250°C creates significant thermal load. Dies are preheated to 250-350°C. Without preheat, thermal shock can crack dies in just a few cycles. Flash gutter design uses 3-6mm thickness with generous land dimensions. Draft angles run 5-7° for reliable part release.

ALUMINUM FORGING

Lower forging temperature (370-520°C) reduces thermal stress, but high thermal conductivity requires precise die temperature control. Both dies are preheated to temperatures adapted to the specific alloy to control the process, particularly grain size management. Draft angles can be reduced to 3-5°, and tighter tolerances are achievable. Die life is significantly longer than with other forging processes.

STAINLESS STEELS
AND SUPERALLOYS

These materials present the most challenging conditions. Higher forging temperatures and greater forces accelerate die wear.

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