What Is Thread Rolling Dies?

The thread rolling dies is a tool that uses metal plastic deformation to roll out threads on a thread rolling machine.

What should I pay attention to when using thread rolling dies?

The thread rolling machine has poor precision, large vibration and abnormal operation.
The alignment of the thread rolling die is not correct, the part to be rolled is displaced axially, and the tooth pattern is subjected to both shearing and extrusion stress.
The size of the rolled thread blanks is uneven, the surface is not cleaned, and there are grinding wheel foam, oxide scale and dirt.
The hardness of the rolled parts is uneven (the bolts of grade 8.8 should be 27~30HRC; grade 10.9 should be 35~37HRC), to prevent sometimes untempered high hardness (50~55HRC) quenched parts being mixed due to poor management In the tempered parts, its hardness is similar to the hardness of the threaded edge of the thread thread rolling dies, resulting in chipping.
Lubricant is not added during rolling, resulting in dry friction, and the temperature of the tooth tip rises sharply to exceed the tempering temperature of the thread rolling dies, and the tooth pattern is softened by excessive tempering, resulting in inverted teeth and piled teeth failure.
The thread rolling dies must be fully demagnetized before leaving the factory. Residual magnetism is not allowed. Otherwise, the tooth pattern will absorb fine iron foam during operation, which will accelerate the wear and tear.

How to maintain thread rolling dies?

The iron pins in the clean thread should be cleaned after the thread rolling dies is used to avoid the formation of teeth during the next use.

When the thread rolling dies is not used for a long time, a layer of oil should be applied to the surface to prevent contact with air and oxidation, which may cause inaccurate dimensions.

The thread rolling diess should be sorted and stored when storing, and don’t throw them away randomly.