Forging is a method of machining metal mechanical parts or blanks under impact or pressure by means of tools or dies. Compared with casting, it can eliminate internal defects, improve or eliminate internal component segregation, and obtain uniform and fine macrostructure and macrostructure, with high toughness, reasonable fiber structure, complete metal flow line, and mechanical properties of forgings generally superior to castings of the same material. For mining support parts, corresponding round steel can be selected according to specific requirements, but forging also has the following shortcomings.
1) The limitations of the equipment, especially the die forgings, require higher tonnage of the equipment because they are not accumulated deformation and have large amount of deformation at one time and large projection area.
2) The processing cost of forgings is high, especially for those requiring high equipment.
3) Forging can not form more complex parts like casting, and its accuracy is low, and the draft angle must be maintained, and its follow-up must be machined and finally formed, and the processing volume is large.
4) The production cycle of the forging mining support parts is long due to mold manufacturing, equipment limitations and other reasons.