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五、冷锻(冷挤压) 冷挤压是特种形式的锻造工艺。冷挤压时,常温金属在挤压力作用下塑性变形至各种形状。这些形状通常是轴对称或稍有非对称特征,它与开式模锻不同,这种工艺不产生飞边。从左到右:剪切下料、杯—杆复合挤、正挤压、反挤杯部,同时镦压法兰和精压肩部术语“冷锻”和“冷挤压”常常可交换使用,例如它涉及众所周知的挤压、镦锻或顶锻、精压、变薄拉深和施压等成形工艺。这些工艺通常是在机械压力机或液压机上完成。生产复杂几何形状的零件,需采用几个成形工步,先挤压简单形状,如图1所示。图2所示为冷锻的一些基本工艺过程。
Fifth, cold forging (cold extrusion) Cold extrusion is a special form of forging process. Cold extrusion, the room temperature plastic deformation under the action of plastic deformation to a variety of shapes. These shapes are usually axisymmetric or slightly asymmetric features, which is different from open forging, this process does not produce flash. From left to right: cut the material, cup-rod compound squeeze, squeeze, squeeze the cup Department, at the same time upsetting the pressure flange and pressure shoulder The term “cold forging” and “cold extrusion” are often used interchangeably , For example it involves well-known forming processes such as extrusion, upsetting or upsetting, coining, ironing and pressing. These processes are usually done on mechanical presses or hydraulic presses. The production of complex geometry of the parts, the need to use several forming steps, first extruded simple shape, as shown in Figure 1. Figure 2 shows the cold forging some of the basic process.