65MN manganese steel GB894A type shaft snap ring shaft snap ring elastic retaining ring hoist C-shaped

Generally, T-shaped bolt structures are common, and their blank shape can be completed in one operation on a multi-station cold heading machine. However, for T-shaped bolts with relatively rare structures, such as those formed by the intersection of the "III4x42 cylinder (head)+III2 cylinder", the two cylinders form a 91 ° intersection. Due to the unique structure, the difficulty of cold forming the head is relatively high. The traditional processing route is: die-casting blank → deburring → turning processing → grinding blank diameter → wire rolling → heat treatment → surface treatment → finished product packaging.

Due to the high demand for electronic products and the reduction of assembly line workers, manufacturing factories need to use automatic thread locking equipment to replace manual labor in response to the shortage of manpower. In existing automatic locking devices, a thread arrangement machine is used to arrange the threads, an electric screwdriver (electric screwdriver) is used to reciprocating the threads, and specialized equipment uses air pressure to blow the threads into the electric screwdriver to transport the threads to the electric screwdriver. The reciprocating method is too time-consuming, and the blow molding method is also used

This type of flat gasket typically includes a passage opening for fluid, which can flow from one side of the flat gasket through the passage opening to the other side of the flat gasket. In addition, functional components can be inserted into such channel openings, such as valve components that block the channel in one direction, or orifices that limit the channel in one or both directions.

"At present, there are several methods for classifying screws of different lengths mixed together: first, visual recognition and manual sorting. This method is time-consuming, labor-intensive, and inefficient. Secondly, centrifuge the screws and screen them based on their quality. However, screws of the same length may not necessarily have the same quality when the materials of the screws are different. Thirdly, a screening device with sieve holes is used for sorting, but the sieve holes are generally simple geometric shapes that can only roughly distinguish the length of screws. Moreover, the specific position where the screw falls into the sieve hole will also affect the degree of screening.
It can be seen that the above screw classification methods have the problem of poor effectiveness"

Referring to Figure 1, one end of the existing embedded nut 1 is embedded in the injection molded part 2 ', and the other end is exposed to the injection molded part 2'. The axial direction of the embedded nut 1 has opposite lower and upper end faces, and the end face of the embedded nut 1 at one end of the injection molded part 2 'is the lower end face. In order to reduce the resistance during hot pressing, an inclined plane is set at the connection between the inner wall surface of the embedded nut 1 'and the lower end face. However, during hot pressing of the embedded nut 1 'with the operational structure, the hot soldering adhesive will generate a flow of water that rises along the inclined plane, forming a convex peak in the screw hole of the embedded nut 1'. This convex peak occupies the space inside the screw hole, making it impossible for the screw 5 'to fully screw in; At the same time, due to the diversion of hot soldering glue, the knurling near the upper end face of the embedded nut 1 'cannot fill the soldering glue, resulting in a weak connection between the embedded nut 1' and the injection molded part 2 '. Therefore, the existing embedded nut 1 'has a lower locking strength with the screw 8' after hot pressing.