The Life of a Screw


Keywords:screw The screw is called "industrial rice", have you ever thought how to come to such a small screw? Today, let's take a look at the past life of a screw. A screw usually goes through 5 steps: (1) drawing; (2) cold heading; 3. Rub silk; (4) Heat treatment; ⑤ Surface treatment. [drawing] is to pull the coils of steel wire out of the steel mill to make the wire rod of the right thickness, soft and hard, the process is like lanzhou noodles :)   [Cold heading] metal metamorphosis, a key step in the formation of screws. Through a series [...]

The Life of a Screw2021-09-23T13:42:21+08:00

Yijin Hardware Tells You Nine Reasons for Screw Tap Fracture


Keywords:reasons for screw tap fracture 1. The Poor quality screw tap: Main materials,tool design,heat treatment, machining accuracy, coating quality, etc. For example, the size of the transition section of the tap is too different or the design of the transition corner is not rounded, resulting in stress concentration, easy to fracture at the stress concentration during use. The cross section transition at the junction of shank and blade is too close to the welding port, resulting in the complex welding stress superimposed with the stress concentration at the cross section transition, resulting in a large stress concentration, which leads to the fracture of [...]

Yijin Hardware Tells You Nine Reasons for Screw Tap Fracture2021-09-23T13:50:53+08:00

What’s the difference between screw, bolt and nut?


(1) bolt: A type of fastener consisting of a head and a screw (cylindrical body with external thread) to be fitted with a nut for fastening two parts with through holes.This type of connection is called the bolt connection. If the nut is unscrewed from the bolt, it can also make the two parts separate, so the bolt connection is a detachable connection. (2) screws: A kind of fastener composed of head and screw can be divided into three types according to their uses — machine screws, setting screws and screws for special purposes.Machine screws are mainly used for fastening connection [...]

What’s the difference between screw, bolt and nut?2021-10-25T11:16:16+08:00