Tooling Development & Toolroom Capability

In-House Tooling Development for Production Stability

At Ming Chiang, tooling development is engineered as the foundation of stable mass production. Our objective is not only to complete a stamping die, but to build a production tool capable of delivering dimensional consistency over millions of cycles.

Tooling speed is not about working faster. It is about controlling more of the process internally.

Controlled Tooling Process Flow

Our tooling workflow is structured to maximize internal control and minimize external dependency.

1. Tool Steel Procurement
   Tooling materials are selected based on tolerance requirements, expected production volume, and wear resistance strategy.

2. In-House Plate Machining
   CNC milling and precision drilling are performed internally to establish accurate base geometry before heat treatment.

3. Controlled Heat Treatment
   Vacuum heat treatment is outsourced to certified partners under strict specification control.

4. In-House Wire EDM & Grinding
   After heat treatment, precision wire EDM and surface grinding are completed internally to achieve final tolerances.
   With five in-house wire EDM machines, engineering modifications can be executed immediately without extended delays.

5. Assembly & Tryout (T0/T1)
   Tool assembly, trial runs, and dimensional verification are conducted internally. Micro-adjustments are implemented based on real springback behavior and CPK validation.

Except for material procurement and heat treatment, all critical tooling processes are managed in-house.

Engineering-Driven Die Design

Our stamping die design integrates DFM analysis, strip layout planning, and CAE simulation to minimize risk before physical manufacturing.

• Tolerance strategy targeting mean value control

• Springback compensation calculation

• Progressive die layout optimization

• Reserved idle stations for future ECN flexibility

By combining digital engineering with in-house manufacturing control, we reduce lead time while ensuring long-term production stability.

Material & Heat Treatment Strategy

Die longevity depends on selecting the right material for the right function:

• S50C for shock absorption (Die Set Base)

• SKD11 (HRC 58–60) for structural rigidity

• SLD for toughness in stripper areas

• SKH9 (HRC 60–62) for extreme wear resistance in punches

This material strategy balances hardness, toughness, and wear resistance across millions of cycles.

Built for Predictable Mass Production

Tooling development directly influences production consistency. By integrating machining, EDM, assembly, and validation internally, we shorten lead times and accelerate engineering modifications.

Intensive communication during development.
Minimal intervention during production.

The result is stable, predictable manufacturing performance.