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涡喷型发动机轴颈锻件属于Ⅱa类锻件Ⅰ类零件,原锻件肥头大耳,工艺落后,不但浪费大量不锈钢,而且在机加过程中尚要消耗不少工时和切削刀具.该锻件在入厂复验及工序间调质处理后机械性能检验时,经常出现a_K值不合格,致使锻件报废。 在德阳二重厂的支持下,我们对轴颈锻件进行了精化,改变了锻件理化检验取样部位,根据零件图形设计的特点,将中心孔部位的余料用套料刀具套出,作为100％性能检验用试料。通过批生产考验,工艺图纸已定型,不但节省了一部分金属,而且冶金质量也完全符合专用技术条件的要求。 一、锻件精化工艺
Turbojet engine journal forgings are Class IIa forgings parts, the original forgings big fat ears, technology behind, not only a lot of waste of stainless steel, but also in the machining process still consume a lot of man-hours and cutting tools forging Factory retest and process after the quenched and tempered mechanical properties test, often appear a_K value unqualified, resulting in forgings scrapped. Under the support of Deyang Duplex Plant, we have refined the journal forgings and changed the physical and chemical inspection forging parts. According to the characteristics of the part graphic design, the excess part of the central hole parts are set with the sleeve cutter as 100 % Performance test sample. Through the batch test, process drawings have been stereotyped, not only saving part of the metal, but also the metallurgical quality in full compliance with the requirements of special technical conditions. First, forging fine process