Forging process of flanges generally consists of the following steps, which selects the high quality billet baiting, heating, forming, cooling after forging. Process for forging a free forging, forging and caul forging. Production, according to the quality of forgings size, the number of choices production batch of different forging method. Free forging low productivity, machining allowance, but simple tools, versatility, therefore is widely used for forging shape simple one-piece, small batch production of forgings. Free forging equipment of air hammer, steam air hammer and hydraulic machine, respectively, suitable for small, middle and large forging production. Forging of high productivity, simple operation, easy to realize mechanization and automation. High precision die forging, machining allowance is small, fibrous tissue distribution of forgings is more reasonable, can further improve the service life of parts.
The basic process is: free forging, the forging shape through some basic deformation process will gradually forged into a blank. The basic process of forging is upsetting, stretching, punching, bending and cutting etc..
Upsetting is the original blank upsetting forging operation process along the axial direction, so that its height, cross section decrease increase. The process is commonly used in the forging of gear blanks and other disk forgings. Upsetting is divided into all the upsetting and local upsetting two.
Pull long stretching is the blank length increases, the forging process of reduced cross section, usually used in the production of shaft blank, such as the spindle of the lathe, the connecting rod etc..
Forging process with a punching punch out through holes or blind holes in the blank.
Bending forging process and the blank is bent into a certain angle or shape.
Twist forging processes a portion of the stock relative to another part of the rotary angle.
Forging blank or excision segmentation cutting head.
Die forging of flanges
Known as the model of die forging forging, the blank is heated placed in fixed on the forging equipment in the forging die forging. The basic process of die forging process of 1 forging: material feeding, heating, pre forging, finish forging, punching, trimming, quenching and tempering, shot peening. Common process are upsetting, stretching, bending, punching, forming.
The common forging equipment common forging equipment die forging hammer, hot die forging press, horizontal forging machine and friction press etc..
Generally speaking, forged flange quality better, generally through the forging production, crystal fine microstructure, high strength, of course, prices are also expensive.
Both the casting or forging flange belong to the common manufacturing method, ask to see the need to use the strength of components, if the request is not high, you can also use turning flange.
Direct cutting flanges stay inside and outside diameter and thickness have processing amount of the disc in the plate, processing then bolt hole and a waterline. Flange so produced is called cut flange, flange to such maximum diameter plate width limit.
In plate cutting sliver and then rolled into round process called rolling, used for some large flange production. Coiling success after welding, and then pressure, processing technology and then water and bolt hole.