天峰科技公司。
李天峰比较关注的是第四、五两台原型机的生产制造事宜。当然也知道自己公司生产制造的第二、三两台原型机已经顺利抵达运八飞机制造厂,也知道这两台发动机已经装上了那架运八K型运输机。
这架运八K型运输机,是运八K系列的第一架原型机,即首架原型机,装两台涡扇16发动机,即将进行试飞。
这些事情,李天峰基本知道得比较清楚,这几天,张海平每天和李天峰通电话,另外,运八飞机制造厂方面也打了电话过来。
这两台涡扇16发动机验证机,即将和运八K一起进行首飞,这些首飞的事情,不用李天峰操心,李天峰只要按时参加首飞仪式就可以了,不但李天峰,天峰科技公司的多名中、高层应邀参加运八K的首飞仪式。
涡扇16第四、五两台原型机的零件加工生产已经全面启动,其中部分零件的加工进度还比较快,如第一级压气机叶片。
因为第一级压气机叶片有部分半成品的毛坯,正好可以接着进行精加工工序,在叶片制造车间,这批叶片已经开始精加工。
一台五轴联动数控铣床上,叶片正在加工,机床旁边的零件箱里面,正有不少的半成品,也有一部分已经完成叶型数控铣削的叶片。
半成品是钛合金锻件,锻造出叶片的大致形状,保留一定的余量,便于精加工,第一道精加工是叶片的数控铣削,主要铣削叶型。
涡扇16发动机的第一级压气机叶片,在所有这几级压气机叶片之中,是最大,最长的叶片,当然,这最大最长只是相对,和风扇叶片相比,那就小巫见大巫了。
第一级压气机叶片采用的也是低展弦比叶片即宽弦叶片,因为压气机叶片比风扇叶片小得多,压气机叶片采用整体钛合金实心叶片。
压气机宽弦叶片设计,它与窄弦叶片相比,增宽了弦长,使压气机的长度缩短,抗外物损伤能力、抗疲劳特性和失速裕度有所提高。还可使压气机零件数减少,降低生产和制造费用成本。
这一批第一级压气机叶片数量数十片,正在进行五轴联动数控铣削。压气机叶片的生产制造工艺,已经经过了充分的工艺验证,工艺方法,工艺参数,已经固定下来。
这台五轴联动数控铣床旁边的工作桌上,正摆着晒兰的工艺卡,而不是白纸的工艺规程,这就说明,这种压气机叶片的生产制造工艺已经成熟,一般不会进行重大更改,以后要做的也仅仅是对工艺的完善。
机床上,一片压气机叶片正在加工,乳白色的冷却液,水花四溅,通过玻璃安全门看得清清楚楚。
高速旋转的合金铣刀,正在叶片上进行高速铣削,大量的碎小的“C”型钛合金金属屑,正被从叶片上铣下来。
李天峰正巧在叶片车间看一看各零件的加工情况,尤其是涡扇16发动机各零件的加工情况,看到这台五轴联动数控铣床正在高速铣削涡扇16第一级压气机叶片,李天峰走了过来。
和操作这台机床的工人师傅稍稍聊几句,问了基本的加工情况,李天峰再听一听机床工作的声音,看一看铣削下来的钛合金金属屑,不用看零件,李天峰基本可以判断,加工非常正常。
再拿起一片已经完成铣削加工的叶片,看一看叶片上的加工纹路,李天峰就不禁点了点头,叶片加工非常不错。
同时,李天峰熟知涡扇16发动机压气机叶片的加工工艺流程,钛合金精密锻造毛坯,这算是半成品,通过数控铣削,叶型的高速精密磨削,在磨削楔型榫头,叶片就基本成型。
当然,这只是主要工序,其中还有其他很多工序,从锻造毛坯开始,经过二十几道工序的加工,最终加工出漂亮精致的,完全符合设计要求的压气机叶片。
不要看现在加工这么顺利,这么顺手,在压气机叶片试制之初,进行工艺验证的时候,那可大费了一番周章,经过对比,完善,改进之后,才有了现在这么流畅,这么成熟的加工工艺。
当初在工艺验证的时候,这种叶片的加工,其加工工艺就有一好几套,如叶片榫头的加工,当初就试验了拉削加工,也试验了磨削加工。
通过试验,叶片榫头的磨削加工效果更好,质量更高,效率也比较高,才有了现在的叶片榫头的磨削工艺。
叶型的加工也是一样,当初试验和验证了很多种工艺方法,最终才确定叶片精锻毛坯,首先经过高速五轴联动铣削,再经过高速高精度磨削,加工出来的叶片质量最好。
李天峰满意的看了已经完成铣削的叶片,点一点,在李天峰看来,叶片的加工质量非常不错,纹路美观均匀,没有什么毛刺,再经过叶片的高精度高速磨削之后,叶片就会更加的漂亮,更加的精致。
“蒋师傅,叶片加工得不错嘛。”
得到李天峰的表扬,操作这台机床的蒋师傅高兴的一笑,然后道:“李总,叶片加工的这么好,我可不敢居功,主要是咱们的工艺方法和工艺参数非常不错,无论换成是谁,只要严格按照工艺要求操作,也能加工出这么高质量的叶片。”
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