No. 1 processing workshop.

In the morning, the paraffin wax filled between the blades has been thoroughly cooled and solidified, and the blades are tightly combined, this huge blade seems to be completely integrated into a whole, which is just convenient for the upcoming fine grinding process, so that the manufacturability is greatly enhanced, and there is no need to worry about the tremor and bullet of the blade in the grinding process.

When everyone walked to the side of this machine tool, the worker master had already installed the parts, and the large-diameter blade disc had been installed on the machine tool working platform, and the worker master was using the dial gauge to align.

Before processing, there are strict alignment requirements in the process, not only to find the normal plane, but also to find the circumference, the workers are according to the process requirements, to find the plane datum and the circumferential datum.

Li Tianfeng's eyesight is relatively good, and he can basically see clearly that the pointer on the dial gauge beats within a trace, and the process requirement is to correct the two datums within a trace.

After the parts are aligned, the tool is set again, and the work before processing is orderly, and after some preparation, the parts processing can be officially started, and the workers and masters cast an inquiring look.

Li Tianfeng personally ordered, "Start processing!! ”

With an order, the machining begins, the outer diameter of the blade tip is finely grounded, and the machine tool starts to work as the machine tool start button is pressed, and the machine tool spindle with the grinding wheel head begins to move, and then the outer diameter of the blade tip begins to be grinded.

The grinding wheel head is completely different from the large grinding wheel used on the ordinary cylindrical grinding machine, and the small grinding wheel used on the internal grinding machine is a little similar, but it is different.

The speed of the grinding wheel head is very fast, grinding the outer diameter of the blade tip, and the grinding blade tip is still an inclined plane with an angle.

Li Tianfeng looked at the grinding situation seriously, and also pricked up his ears, listening to the sound of grinding, seeing that the sound was normal and very stable, Li Tianfeng was a little relieved.

Long Yingshi also looked at the grinding situation in the machine tool with great interest, and saw that the processing situation seemed to be good, Long Yingshi couldn't help but nod, full of hope for this process.

Blade tip fine grinding, machining allowance is not large, unilateral 15 wires or so machining allowance, such a process, although the processing requirements are very high, processing difficulty is also very large, but the processing time is not long, less than half an hour, the machine tool speed gradually slows down, the machine tool spindle also begins to retract, which represents the processing is basically completed.

The machine tool processing completely stopped processing, the worker master opened the machine tool safety door, held a special measuring tool, carefully checked the table, and after the good, began to measure the outer diameter of the blade tip just grinded, after some measurement, the worker master said: "Mr. Li, now it is Φ915.021, the outer diameter is two wires larger,. ”

Li Tianfeng nodded, it is very normal to have two large filaments, considering that in order to prevent excessive processing, the program is prepared according to the difference, after the processing is completed, if it is found to be large, it can be regrinded, so that the size is guaranteed.

"Half a filament and half a filament are fed, and after grinding two filaments, the outer diameter of the blade tip is measured." Li Tianfeng said.

Because it is a CNC machine tool, it can be a little bit of a small feed, such as a half-wire, in this way, the processing has a guarantee, the worker master fully understands what Li Tianfeng means, and begins to start the machine tool, according to Li Tianfeng's requirements little by little feed.

Divided into four times, a total of two wires, grinding several times, retract the measurement, after some measurement, the worker master said: "Mr. Li, the current size is Φ914.996, do you continue to grind?"

The outer diameter of the blade tip can be smaller and smaller, because this is the processing of the outer circle, and the outer circle processing, the general use of negative tolerance, in general, once the tolerance can be reached, such as the outer diameter of the blade tip of this part is required to be Φ915, the tolerance is negative 5 wires, Φ914.996 has entered the tolerance, for the qualified value.

Li Tianfeng looked at Long Yingshi with a smile, "Mr. Long, do you want to continue grinding?" We can grind a little bit smaller. ”

Long Yingshi's mood was very refreshing, this kind of processing was completely under control, there was a feeling of a big hand in hand, it seemed that there had been no such feeling for a long time, Long Yingshi said happily: "Mr. Li, grind about 1 wire smaller." ”

Li Tianfeng nodded, so the worker master began to feed the knife little by little, grinding the blade tip of the part round by circle, grinding a small trace, and then measuring, the result of the measurement is that the grinding is 1.2 filaments, and the current outer diameter of the blade tip is Φ914.984, the size is completely qualified, close to the middle difference position.

The machine tool has a machining error, not theoretically a trace of the tool, the parts will be strictly processed, there will always be a certain error, however, under normal circumstances, this error is acceptable, such as just now, the knife into 1 wire, the actual part is processed 1.2 wire.

Φ914.984, the size is perfect!

Li Tianfeng was very happy, and then said: "Measure a few more points and take a look at the size of these measurement points." ”

The outer diameter of the blade tip is Φ915, in the aero engine, it belongs to a relatively large size, such a large outer circle size, it is inevitable that there will be an ellipse, that is to say, no one can process this outer circle into an absolute rule of the positive garden, in the actual processing, there is always a certain ellipse, as long as a few more points are measured on the outer circle, it can generally be measured, because the results measured by these points are certainly not consistent, there is always a certain gap.

Seeing Li Tianfeng say this, Long Yingshi also knew the truth, and immediately agreed: "Yes, yes, measure a few more points, the more points you measure, the more accurate the more points." ”

According to the words, the master of the worker took the special measuring tool and carefully aligned the table, and then basically measured eight points on the parts.

Seeing that the worker's master had completed the measurement, Long Yingshi was the first to ask with concern, obviously very worried about whether there would be a relatively large ellipse, once a few filaments appeared, it would be very dangerous and might cause local out-of-tolerance.

Fortunately, the answer of the master worker made Long Yingshi's heart completely relieved!

The worker's master replied: "The processing quality of the parts is very good, I measure the eight points evenly, the dimensional consistency is very good, and the outer diameter of the blade tip is between Φ914.981 and Φ914.988." ”

Between Φ914.981 and Φ914.988!

1 silk within!

Long Yingshi thought that he had misheard, and glanced at the worker master in a daze, and after seeing the worker master nodding vigorously to confirm, Long Yingshi was overjoyed, "Mr. Li, I didn't expect that the processing is so good, this large outer circle, with a diameter of more than 900 millimeters, can be processed so round, amazing!" ”

It is truly remarkable that such a large outer circle can be processed so round!

The processing quality is really good, Li Tianfeng was also happy in his heart, and waved his hand: "Disassemble the parts, turn them into wax, clean them, and then measure the sizes." ”

There is generally a slight difference between the measurement of parts on the machine tool and the measurement under the inspection platform, because the measurement on the machine tool is generally in a compressed state, and after it is loosened, it is measured, and there is a gap.

It doesn't take much time to wax work, after the wax is completed, clean it, place the parts on the inspection platform, measure it down, although there is a certain difference with the machine tool, but the difference is very small, the size is completely qualified, even if the tip of the blade beats is completely within the two filaments.

Yes, yes, really, really good.

Long Yingshi continued to nod, the quality of parts processing is so good, Long Yingshi is not happy, after the precision milling blade, the basic processing of this part is completed, only some finishing processes, the quality of parts processing is basically finalized, that's it.

"Mr. Long, go up and sit down again and drink tea." Li Tianfeng invited, Li Tianfeng has his own plans, the processing quality of this part is so good, Long Yingshi is so happy, of course, he wants to take advantage of the victory to pursue and win some processing business from Long Yingshi.

Meeting room.

The atmosphere is naturally very harmonious, there are talking and laughing, Long Yingshi is also very arrogant, within the scope of his own power, promised to give Li Tianfeng a lot of processing business, in addition, Long Yingshi sent an invitation, ask Li Tianfeng to go to factory B, and then specifically agree on more processing business.

"Mr. Long, what a refreshing person! I will definitely come to Factory B to pay a good visit to Mr. Long. ”

Li Tianfeng has a good heart, and he took the processing business again, maybe this is still a breakthrough, and he may be able to get more processing business from Factory B in the future.

………

It's about to end at work.

Hu Xiao entered Li Tianfeng's office, Hu Xiao came in to report to Li Tianfeng, every month, Hu Xiao's human resources team recruited a lot of personnel from outside to enter Tianfeng Technology Company, including technicians, managers, workers, mature talents, and college students who had just graduated.

At present, major colleges and universities are starting spring job fairs one after another, Hu Xiao reported about participating in the job fairs of major universities, after listening to Hu Xiao's report, Li Tianfeng is very satisfied with Hu Xiao's work.

After Hu Xiao left, Li Tianfeng looked at the time, it was already past the end of work, and he was about to go out to get off work, when Liu Wei knocked on the door and came in, "Boss, the ticket has been booked, and it will be 10:30 in the morning the day after tomorrow." ”

Long Yingshi invited Li Tianfeng to go to Factory B, Li Tianfeng was ready to leave the day after tomorrow, and Long Yingshi had returned to Factory B yesterday, and the large-scale integral blade disc parts that Tianfeng Technology was responsible for processing were also packed and sent to Factory B this afternoon.

Li Tianfeng, who graduated from Beihang University, basically entered various aviation enterprises or aviation industry research institutes across the country, and Li Tianfeng had three classmates in Factory B, and also had one classmate in the second aero engine design institute adjacent to Plant B.

Li Tianfeng took the first step, Zeng Qinghai, Liu Wei and several people will leave one day late, everyone met in factory B, and went to factory B, Li Tianfeng naturally made sufficient preparations, and did not pull a large amount of processing business from factory B, it would never stop.

…………

Today's fourth watch, the second watch will be sent!!

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