Cold Extrusion of Small Thread Base Hole Technology
Cold extrusion technology is a kind of metal forming technology, which is widely used in machinery, automotive, aerospace and other fields. In these fields, cold extrusion is an important technology for the production of precision spare parts, especially parts with complex structure. Through a reasonable process and technological parameters, cold extrusion can meet many requirements for the production of small thread base holes.
The working principle of the cold extrusion technology of the small thread bottom hole is: under the pushing force of the pushing force, the metal is extruded through the die hole with specific geometry, and the plastic deformation of the metal is made, so as to obtain the blank with the required size, shape and performance. The purpose of cold extrusion of small thread bottom holes is mainly to obtain the threaded hole inner and outer surface with high precision and surface finish. In the cold extrusion of small thread base hole, the punch, die and lubrication system are the main components of the cold extrusion process of small thread base hole.
The punch is the main component of the cold extrusion of small thread base hole. It plays an important role in controlling the quality of the cold extrusion small thread base hole. The most important performance is to ensure the required dimensional precision and surface finish of the extrusion small thread base hole. The quality of punch directly affects the quality of small thread base hole. Therefore, when choosing the punch, the extrusion size and hole type should be considered firstly, and then the material and hardness of the punch should be selected according to the material properties of the small thread base hole and the extrusion conditions.
The die is an important part of the cold extrusion of small thread base hole. The die is made of high strength alloy steel, and it is necessary to have high wear resistance and high dimensional accuracy. The purpose of the die is to control the hole shape, hole size and surface finish of the cold extrusion small thread base hole. The die needs to be processed by carburization and cryogenic treatment to ensure its quality.
It is necessary to ensure whether the lubrication system is available during the cold extrusion process of small thread base hole. Generally speaking, it is necessary to add a reasonable amount of high temperature lubricant for extrusion process. Using high temperature lubricant can protect the shape and size of small thread base hole and reduce the surface roughness. In addition, the lubricant can also play the role of cooling and heat dissipation, reduce the friction coefficient between the punch and die, and reduce the adhesion of the extrusion back. The suitable lubrication system is based on the material and process conditions of the small thread base hole.
In summary, the process technology of the cold extrusion of the small thread bottom hole has the characteristics of high precision, high efficiency and good surface quality. According to the structure and production requirements of the small thread base hole, the punch, die, lubrication system and other components need to be reasonably selected, organized and integrated to ensure the successful production of the cold extrusion of small thread base hole.
