Material forming method is an important part of part design, and also a key factor in the processing process. In addition to machining, metal injection molding, plastic molding and 3D printing, which have sprung up in recent years, are the main technologies. Let's take a closer look at the characteristics of these metal forming processes.|custom metal stamping

casting
The production method of pouring liquid metal into the mold cavity corresponding to the shape and size of the part, waiting for it to cool and solidify, so as to obtain the blank or part, which is usually called liquid metal forming or casting.

Process flow: liquid metal → mold filling → solidification shrinkage → casting

Low pressure casting

It refers to the method that liquid metal fills the mold under the action of low pressure (0.02 ~ 0.06mpa) and crystallizes under pressure to form castings.

Technical features:
1. The pressure and speed during pouring can be adjusted, so it can be applied to various casting molds (such as metal mold, sand mold, etc.), casting various alloys and castings of various sizes;
2. The bottom injection mold filling is adopted, and the liquid metal mold filling is stable without splashing, which can avoid the involvement of gas and the scouring of mold wall and core, and improve the qualification rate of castings;
3. The casting crystallizes under pressure, with compact structure, clear outline, smooth surface and high mechanical properties, which is particularly beneficial to the casting of large and thin-walled parts;

4. The feeding riser is omitted, and the metal utilization rate is increased to 90 ~ 98%;

Centrifugal casting

A casting method in which molten metal is poured into a rotating mold, and the mold is filled and solidified under the action of centrifugal force.

Application:

Centrifugal casting was first used to produce cast pipes. Centrifugal casting technology is used in metallurgy, mining, transportation, drainage and irrigation machinery, aviation, national defense, automobile and other industries at home and abroad to produce steel, iron and non-ferrous carbon alloy castings. Among them, the production of castings such as centrifugal cast iron pipes, cylinder liners and shaft sleeves of internal combustion engines is the most common.

forging
Using forging machine to exert pressure on metal blank to produce plastic deformation, so as to obtain forgings with certain mechanical properties, certain shape and size.

According to the forming mechanism, forging can be divided into free forging, die forging, rolling ring and special forging.

Free forging: generally, it is a processing method that uses simple tools to hammer metal ingots or blocks into the required shape and size on hammer forging or hydraulic press.
Die forging: it is formed by using a die on a die forging hammer or hot die forging press.
Ring grinding: refers to the production of ring parts with different diameters by special equipment ring grinding machine, which is also used to produce wheel shaped parts such as automobile hubs and train wheels.

Special forging: including roll forging, cross wedge rolling, radial forging, liquid die forging and other forging methods, which are more suitable for the production of some special shaped parts.

Technical features:
1. The quality of forgings is higher than that of castings, which can withstand large impact force, and the plasticity, toughness and other mechanical properties are also higher than castings or even rolled pieces.
2. Save raw materials and shorten processing hours.
3. High production efficiency.

4. Free forging is suitable for single piece and small batch production with great flexibility.

Application:

Rolls and herringbone gears of large rolling mills, rotors, impellers and retaining rings of steam turbine generator sets, huge hydraulic press cylinders and columns, locomotive shafts, crankshafts and connecting rods of automobiles and tractors, etc.