Fastener screw head is prone to bad phenomena

1. Eccentricity

Poor installation and improper adjustment of the two-stroke product.

2. Tilt your head

Poor installation and improper adjustment of the first punch.

3. The head is not round

The selection of a die is improper or the molding is not full enough.

4. Die cracks

The die is broken or the R angle of the die is improper, causing the die to be scratched by the second impact.

5. Double head

Poor molding in one punch. (Guide: Knowledge of Fasteners: Why is the screw head not round?)

6, burrs

The poor forming of a punch is mainly caused by the gap between the punch rod and the die hole is too large or the punch rod is too short.

7, cracked corner

The punch needle is broken or the second punch is not heavy with the punch.

8. Cracked head

For material problems, metal materials must be strictly tested with special potions. If necessary, use heating equipment to heat the wire a little; or a die is used incorrectly (

For example, a die with a hexagonal washer head for the pan head), and the viscosity of the lubricating oil is invalid.

9. A black film is formed on the surface after the head is formed and it is difficult to clean and remove

Generally, the black film on the surface of stainless steel is eroded and removed. Etching can be used to remove, or chemical polishing can be used to remove the black oxide film on the surface.

More related stamping product processing industry news: