A forging moulds an object with the required shape or appropriate compression force by plastic deformation. This is done by using a hammer or pressure. The metal structure and mechanical properties can be improved after forging processing, and the continuity of metal fiber structure can be guaranteed by forging processing, so that the forging fiber structure and the forging shape are consistent, the metal flow line is complete, which can guarantee the good mechanical properties and long service life of the parts.

The technological process of hot die forging is as follows: blanking; Forging billet heating; Roll forging blank; Die forging; Trimming; Punching; Correction; Intermediate inspection to inspect forgings for dimensions and surface defects; The forging heat treatment of equipment parts forging company is used to eliminate forging stress and improve metal cutting performance. Cleaning, mainly to remove the surface oxide scale; Correction; Inspection: forgings must be inspected for appearance and hardness, chemical composition analysis, mechanical properties, residual stress and nondestructive testing. Forging materials are mainly carbon steel and alloy steel of various components, followed by aluminum, magnesium, copper, titanium and their alloys. The original states of materials are bars, ingots, metallic powders and liquid metals. Forging can be divided into free forging, upsetting, extrusion, die forging, closed die forging, closed upset forging. The motion of forging die can be divided into swing rolling, swing forging, roll forging, cross wedge rolling, ring rolling and cross rolling.

Rotary rolling, rotary forging and ring forging can also be done by precision forging. Forgings require that each piece be consistent and free from any porosity, excess space, inclusions or other defects. Forgings have the advantages of extendable length and contractible cross section; Contractible length, extendable cross section; Variable length, variable cross section. There are more than ten kinds of forgings used in diesel engine, such as cylinder cover, spindle neck, crankshaft end flange output end shaft, connecting rod, piston rod, piston head, crossheading pin shaft, crankshaft transmission gear, tooth ring, intermediate gear and dyeing oil pump body.