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按目前的精锻水平,透平、压缩机的叶片和齿轮在一定条件下,使用适当的方法,能把零件的大部分,精锻到无需精加工的程度。汽轮机与燃气轮机叶片的尺寸,在下列范围内可以精锻成形:长200～1600mm、宽60～400mm、扭转角接近90°,以汽轮机末级叶片为例,长度为1600mm,经精锻成形后的总误差为0.5mm,表面粗糙度可达R~t≤25μm。叶片的材料可以是马氏体13％铬钢或以镍、钛、钼为基础的合金。投产前先由订货者以穿孔带或数表形式提供叶片的坐标。全部锻造所需的参数、形状和工具均由计算机程序确定。为了保持小的制造公差,反复调整精确的预锻坯是十分重要的。棒料先由数控圆锤机锻成中间锻坯,由此获得具有高精度的第一道材质的合理分布。采用圆挤压机(Rundknetmaschine)可不需中间加热而达到
At the current level of precision forging, turbine, compressor blades and gears under certain conditions, the use of appropriate methods, most of the parts, precision forging to the extent not required for finishing. Turbine and gas turbine blade size, in the following range of precision forging: 200 ~ 1600mm long, wide 60 ~ 400mm, twist angle close to 90 ° to turbine last stage blades, for example, the length of 1600mm, after precision forging The total error of 0.5mm, the surface roughness up to R ~ t ≤ 25μm. The material of the blade may be martensite 13% chromium steel or an alloy based on nickel, titanium, molybdenum. The coordinates of the blade are provided by the orderer in the form of a perforated tape or a digital watch before commissioning. The parameters, shapes and tools required for full forging are determined by the computer program. In order to maintain small manufacturing tolerances, it is important to repeatedly adjust the exact preform. Bar first CNC hammerhead forged into the middle forging billets, resulting in a reasonable distribution of the first material with high precision. The round press (Rundknetmaschine) can be achieved without intermediate heating