The manufacturing process of the iron plate screw is almost the same as that of the general small screw manufacturing method. The iron plate screw has both the function of teeming and the double locking function when used. Therefore, different properties can be expressed in terms of material selection and heat treatment. Iron plate screw Use two materials:
(1) Carbon steel must be surface carburized, quenched, tempered, etc., and used in thin iron plates.
(2) Stainless steel requires mechanical properties from work hardening and does not require heat treatment. It is used in aluminum.
There is a head, cross, hexagon and other head types on the head of the iron plate screw, which is almost the same as the small screw. Teeth have A teeth, B teeth, AB teeth, etc. The cusps have pointed, parallel heads, cut heads, etc. The types are very complicated, but for the same material, the same shape, the manufacturing process is not necessarily the same, so equipment, technology There will be changes, such as the manufacture of B teeth, the processing of the front slope, before the technology did not break before, the pole diameter after the head must be cut through the front cutting slope after tooth decay, and now the technical improvement, at the same time the beginning of the narrowing Tilting the front end can save a lot of time.
The use value of iron dies is relieved from many locking work. Generally used in electrical products, household appliances, transportation equipment, etc., mostly used in thin iron plate is not drilled but thick iron plate (below 5mm) first drilling hole or punching without gong teeth, direct lock, no spring mat , nuts and other accessories, and not easy to loose, there are many benefits; can save material costs and processing fees. With a plate thickness of 5mm or more, it has a strong torsion, so it is necessary to tap the teeth first or to cut the front end of the screws. Helping the cutting action to reduce the control of the torque aperture will directly affect the torque during locking. Most of the iron plate screws use power screwdrivers such as electric or air