CNC turret punch is widely used in the sheet metal processing industry due to its fast speed, high precision, great mold versatility and its suitability for small batch production and multiple variety products.
However, it has very strict requirements for precision and die quality, making the selection and maintenance of turret punch tools critical.
How to Select Turret Punch Tools
Select the best die gap
Die gap refers to the difference in size between the edge of the punch and the die. It is influenced by several factors such as board thickness, material and process.
Choosing appropriate die clearance is essential to obtain good punching quality, reduce burr and collapse, maintain plate flatness, prevent material carryover, and extend die life.
If the gap is too large, the resulting part will have a relatively large burr. On the other hand, if the gap is too small, the punching quality will be poor, the die will suffer significant wear, and its service life will be significantly reduced.
Therefore, selecting a reasonable die gap is beneficial to improving product quality, prolonging die life, and reducing processing costs.
Typically, the corresponding die clearance is chosen based on the product drawing provided by the customer and compared with Table 1.
Table 1 Die Gap Selection
| Material | Minimum release | Best release | Maximum clearance |
| Red copper | 8%t | 12%t | 16%t |
| Brass | 6%t | 11%t | 16%t |
| Mild steel | 15%t | 20%t | 25%t |
| Aluminum (soft) | 10%t | 15%t | 20%t |
| Stainless steel | 20%t | 25%t | 30%t |
Note: If the board thickness
