What aspects should I pay attention to when using drill tail screws?
2024-01-30
The tail is in the shape of a drill tail or pointed tail, and there is no need for auxiliary processing. It can be directly drilled, tapped, and locked on the setting materials and basic materials, greatly saving construction time. This kind of screw is called a drill tail screw.Compared with ordinary screws, its toughness and maintenance force are high, and it will not loose for a long time after combination. It is simple to complete the operation at once using safe punching and tapping.
The following six major problems need to be paid attention to when using and maintaining drill tail screws：
1. The process of rinsing the drill tail screw is very important and requires great care. During this process, residues will remain on the surface of the drill tail screw.The rinsing step is after the silicate cleaner is cleaned.
2. The stacking of the drill tail screws should be combined during the tempering and heating process, otherwise it will cause slight oxidation in the quenching oil.
3. White residues of phosphide will appear on the surface of high-strength bolts, indicating that (Point 1) The inspection is not careful enough during operation.
4. The surface of the parts will be blackened and chemical reactions will occur, which means that the work before the heat treatment is not done thoroughly, and the alkaline residues on the surface have not been completely removed.
5. Standard parts and components will rust during rinsing, and the water used for rinsing should be replaced frequently.
6. The phenomenon of excessive corrosion indicates that the quenching oil has been used for too long and needs to be added or replaced with new oil.
Keywords：
Nuts and Bbolts
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