1. Introduction
In die manufacturing, tolerances refer to the permissible limits of variation in a physical dimension or measured value. These tolerances are crucial because even small deviations can significantly affect product quality, tool life, and process efficiency. Quality control ensures that the manufactured dies consistently meet specified tolerances and functional requirements.
2. Importance of Tolerances in Die Manufacturing
Fit and Function: Proper tolerances ensure that die components fit together correctly and operate as intended.
Interchangeability: Allows for replacement parts to be swapped without rework or modification.
Cost Efficiency: Overly tight tolerances increase manufacturing costs; optimized tolerances balance performance with economy.
Tool Life and Maintenance: Accurate tolerances reduce wear and tear, extending die life.
Product Quality: Ensures consistent production of parts within specified limits.
3. Common Tolerances in Die Manufacturing
| Feature | Typical Tolerance Range |
|---|---|
| Hole diameter | ±0.005 mm to ±0.02 mm |
| Punch and die clearance | Depends on material thickness and type (typically 5–10% of material thickness) |
| Parallelism and flatness | ±0.01 mm to ±0.05 mm |
| Angularity | ±0.1° to ±0.5° |
| Surface finish | Ra 0.8 µm to 1.6 µm (fine surfaces) |
