Flat Phillips Nylok Small Screw

Overall Description

Flat Phillips Nylok Small Screw Details

Flat Phillips Nylok Small Screw Application

Flat Phillips Nylok Small Screw Production Flow

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Introduction to rolling

Rolling is not a metal cutting process compared to cutting methods. It does not form the desired profile by removing the metal, but forms a thread according to the mirror image of the roller drawing die, which is a non-cutting thread forming process. When rolling the thread, the roller mold presses the base material to press the thread shape into the workpiece blank. As the roller misaligns the material that will form the root, the material will flow out of the root from the radial and axial directions, and the shape of the roller will form a thread shape in the workpiece blank. The figure below shows the microstructural changes of the material of the rolling thread and the cutting thread.

Rolling is mainly used for the machining of external threads. Before processing, the diameter of the blank should be approximately equal to the median diameter of the thread. For higher precision threads, the choice of blank diameter should be determined based on material performance calculations and process tests. Unqualified threads will be machined beyond or below the proper diameter. If the outer diameter of the blank is too small, it will not flow completely into the roller mold; if the blank is too large, unnecessary pressure will be applied to the roller and the roller frame, which may cause damage to the thread rolling equipment. Most of the rolling threads are 60° angled threads, and the rollers used have sharper tips, usually with a rounded edge to facilitate penetration of the material. 30° on each side of the tooth ensures the force required to flow the material in a controlled and predetermined manner in the axial and radial directions. The figure below shows the thread rolling wheel