The casting process usually includes.
①Preparation of molds (containers that make liquid metal into solid castings). According to the materials used, molds can be divided into sand, metal, ceramic, clay, graphite, etc., and can be divided into disposable and semi-permanent according to the number of times of use. There are three types of permanent and permanent. The pros and cons of replacing the solenoid valve are the main factors affecting the quality of castings;
②Smelting and pouring of cast metals, cast metals (casting alloys) mainly include cast iron, cast steel and cast non-ferrous alloys;
(3) Treatment and inspection of castings, including the removal of cores, the removal of foreign bodies on the surface of the castings, the removal of pouring risers, the treatment of burrs, drapes and other protrusions of the scraper, as well as heat treatment, forming, rust prevention, rough machining, etc. . Input pump pump valve
The analysis of the forging process is as follows:
A forging press is used to apply pressure to the metal blank to cause plastic deformation, so that the reversing solenoid valve obtains a forging with a certain mechanical performance, a certain shape and size.
One of the two main components in the forging process:
The use of this forging process can eliminate defects such as loose cast and welded holes, and the mechanical properties of forgings are generally better than similar materials. For important workpieces, the mechanical load is large and the working environment is harsh. In addition to rollable plates, profiles and welded parts with relatively simple shapes, forgings are generally used.
According to the different forming methods, forging is divided into:
②Open forging (free forging):
Use impact or pressure to deform the metal between the upper and lower iron blocks to obtain the required forgings, mainly manual forging and mechanical forging.
②Closed die forging:
The forgings obtained by deforming a metal blank with a certain shape in the die cavity can be divided into die forging, cold forging, rotary forging, extrusion and so on. According to the deformation temperature, forging can be divided into hot forging (processing temperature higher than the recrystallization temperature of the blank metal), warm forging (under the recrystallization temperature) and cold forging (normal temperature).