自由鍛造是利用沖擊力或壓力使金屬在上下砧面間各個方向自由變形，不受任何限制而獲得所需形狀及尺寸和一定機械性能的鍛件的一種加工方法，簡稱自由鍛。

Free forging is a processing method of forging parts, which can make metal in all directi of the anvil between the upper and lower anvil, and obtain the required shape and size and certain mechanical properties by the impact force or pressure, and the free forging is called free forging.

自由鍛造所用工具和設(shè)備簡單，通用性好，成本低。 同鑄造毛坯相比，自由鍛消除了縮孔、 縮松、氣孔等缺陷，使毛坯具有更高的力學(xué)性能。鍛件形狀簡單，操作靈活。

Free forging tools and equipment are simple, versatility and low cost. Compared with the casting blank, the free forging eliminates the defects such as shrinkage porosity, porosity, porosity and so on, so that the blank has higher mechanical properties. The shape of the forgings is simple and the operation is flexible.

自由鍛造的設(shè)備分為鍛錘和液壓機兩大類。生產(chǎn)中使用的鍛錘有空氣錘和蒸汽-空氣錘，有些廠還使用結(jié)構(gòu)簡單，投資少的彈簧錘、夾板錘、杠桿錘和鋼絲錘等。

The equipment of free forging can be divided into two categories: forging hammer and hydraulic press. The forging hammers used in production are air hammer and steam-air hammer. Some factories also use spring hammer, splint hammer, lever hammer and steel wire hammer with simple structure and low investment.