That's a big guy!

Large parts with a diameter of more than 500 millimeters, the general CNC lathe really can't be turned, because the parts are relatively large, the diameter of more than 500 parts, plus the number of turning fixtures used for processing, the CNC lathe with an effective diameter of 600 millimeters is too small, fortunately, considering that large parts will be processed, Li Tianfeng purchased several relatively large CNC lathes.

Generally speaking, the processing diameter of horizontal CNC lathes can reach about 800, which is a large CNC lathe, and vertical CNC lathes are generally necessary to process larger parts.

It is possible to process parts with a diameter of two or three meters, or even a few meters in diameter, while a horizontal CNC lathe cannot achieve such a process, such a large vertical CNC lathe, in the second batch of machine tool equipment procurement plan, there are exactly two.

It's just that these two vertical CNC machine tools that can process workpieces with a diameter of one or two meters can be transported to Tianfeng Technology Company, and they are ready to start installation and commissioning, and they are not needed for the time being.

Seeing this big guy part, Li Tianfeng couldn't help but walk over, of course Li Tianfeng was very familiar with this part, this is the turbine outer ring of the turboprop B engine.

Aviation parts are generally very light, it cannot be very bulky, and the same is true for the outer ring of this turbine, the official finished parts are very light, and the weight is estimated to be one or two kilograms, but the blank is very heavy, very large, and the weight is at least fifty kilograms or more.

It is very common for the blank of the aerospace part to be very bulky, while the final finished part is very light, and there are quite a few such parts, and the turbine outer ring is one of them.

The blank of the outer ring of the turbine is a forged part, like a large ring, with a thickness of more than 100 mm, a width of about tens of millimeters, and a maximum diameter of more than 500 millimeters.

Tianfeng Technology Co., Ltd. is responsible for the rough machining and semi-finishing of the part, and after processing it into a semi-finished product, it is sent back to factory E for final finishing until it is processed into a finished formal part.

Li Tianfeng was more impressed by this part, not only because the part is relatively large and the machining allowance is large, but because the part is very difficult to process in the process of finishing, and it is very difficult to meet the requirements, and the pass rate has been relatively low.

When he used to work in factory E, Li Tianfeng originally wanted to improve the process of the part and improve the processing quality of the part, but he resigned from the factory E before he had time to do it.

The requirements for rough machining and semi-finishing are much lower than those for finishing, and the processing will definitely be much smoother, there should be no problems, thinking so in his heart, Li Tianfeng came to the side of this CNC machine tool.

Seeing these blank parts being processed, Li Tianfeng couldn't help but take a closer look, it seemed that the processing quality was good, and every time the processing of a process was completed, the parts would be "slimmed" a lot, and finally, until they became a thin ring parts.

The outer ring of the turbine, of course, is a ring part, and the outer ring of the turbine of turboprop B, after forming a formal part, has a wall thickness of only 1.5 mm and a width of about 40 mm.

After looking at these parts, Li Tianfeng couldn't help asking, "Master Feng, how is the processing going?" ”

Master Feng, who processed this number of car processes, said: "Mr. Li, the processing quality is okay, but the processing allowance is very large, and the processing time of each part is relatively long. ”

Li Tianfeng nodded, it is normal for the processing cycle to be long, because the amount of parts cutting is very large, and it can be seen from the iron scrap bucket next to this CNC lathe that is full of metal scraps.

As a large number of materials are cut down, the parts become gradually thin after the parts are greatly "slimmed", the rigidity gradually deteriorates, and the processing deformation begins to appear, and the cylindricity of 20 filaments is gradually difficult to achieve.

The so-called deviation is that the cylindricity of the part has been worse than 15 wires, or even close to 20 wires, which is not a good phenomenon, representing that the processing quality of the parts has been relatively poor.

Li Tianfeng pondered a little, and basically knew it in his heart, because this part had been paid attention to when he was in Factory E, and it was relatively clear, and then he looked at the processing technology and program of counting cars, and Li Tianfeng's heart was even clearer.

It just so happened that Li Tianfeng saw that Zhang Can was not far away, so Li Tianfeng beckoned slightly, and Zhang Can came over.

"Mr. Li, what are your instructions?"

Li Tianfeng pointed to the turbine outer ring that was being processed: "This batch of turbine outer rings will be suspended after processing this piece on the CNC lathe, and our processing technology and CNC program will be improved." ”

"Mr. Li, is there something wrong with this batch of parts?" Zhang Can couldn't help but ask a little worriedly.

Li Tianfeng said: "There is no big problem for the time being, but the processing situation is not ideal, and some sizes have been on the upper side, let's go to the process technology room." ”

The process technology room of the first workshop is relatively large, it was originally a large office designed according to twenty or thirty people, and now there are only three or five process technicians in the first workshop, which is more empty, and next to the process technology room, there is a data room and a drawing reading room belonging to the process technology room.

In the process technology room, there was a big table, and Zhang Can personally brought all the relevant drawings, and in addition, the process technician who was responsible for the processing technology and programming of the turbine outer ring also came.

Li Tianfeng didn't talk nonsense, spread out the drawings, and went straight to the point: "Our turboprop B turbine outer ring is being processed, I just looked at the processing quality, the situation is not ideal, we can improve the process, in the CNC machining program, in order to ensure the good processing quality of the part." ”

Aviation parts, quality is very important, although this is rough machining, the cylindricity of parts is required to be 20 wires, Li Tianfeng believes that the ability to reach within 10 wires, absolutely strive to process to 10 wires, can reach within 5 wires, absolutely to process to within 5 wires.

Seeing Zhang Can, as well as the technician in charge Xiao Zhou listened very carefully, and was waiting for himself to continue, Li Tianfeng did not stop, and continued: "The outer ring of the turboprop B turbine is now rough, and our goal is not only to ensure the quality of the relevant sizes, but also to relax the technical requirements of the technical conditions that represent whether the parts are deformed with a cylindrical degree of 20 wires, I think it should be processed to less than 5 wires." ”

5 silk!

Zhang Can was taken aback, he didn't expect Li Tianfeng to put forward such a high requirement, but in it, Zhang Can was quickly relieved, 5 wires are 5 wires, the stricter it is, the better the processing quality of the parts.

Li Tianfeng continued: "The processing technology should be improved in this way, add a process table here, when the parts are clamped, the fixture pressure plate is pressed on this process table, so that the maximum degree can reduce the deformation of the parts clamping, again, the process parameters, the number of car programs to take the knife route, the amount of feeding, etc., should also be improved, I think it is necessary to improve the ......

Li Tianfeng even picked up a pen and paper, almost hand-in-hand, to guide Zhang Can and others on how to improve the process, which took almost half an hour.

Li Tianfeng told in such detail, Zhang Can naturally immediately understood, after listening, Zhang Can assured: "Mr. Li, we will immediately start to improve the process, and after the improvement, we will process the parts." ”

Xiao Zhou, the process technician in charge, is a newcomer to Tianfeng Technology Company, and his level is not bad, and he completely understands it, because he understands it better, Xiao Zhou's heart is full of shock and surprise, and he never expected that Li Tianfeng, as the general manager, the big boss of this company, actually has such a level of technology.

As a result, Xiao Zhou's gaze on Li Tianfeng was different, and there was a trace of admiration in his eyes. If Xiao Zhou knew Li Tianfeng, he would definitely be even more shocked and admired, Li Tianfeng's level is not just like this, this can only be regarded as Xiao Lu's hand.

"Hmm." Li Tianfeng nodded, "Inform me when I process again, I want to come over and take a look at the processed parts after the process is improved." ”

Looking at the empty process technology room, Li Tianfeng changed his words and said: "Zhang Can, you have too few people here, and there are not a few soldiers under your command, so I will add ten process technicians to you in a few days." ”

Hearing this, Zhang Can was overjoyed, rubbed his hands happily and said: "Mr. Li, that's really thankful, with so many new forces joining, my work will be better carried out, and I will have more confidence and confidence." ”

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In the afternoon, Li Tianfeng was personally at the gate of Tianfeng Technology, as if he was waiting for someone, while waiting, he also looked at his watch from time to time.

Looking at it like this, there should be someone who wants to come over, and seeing that Li Tianfeng attaches great importance to Cheng Dù, and personally waits at the door to see, it should not be simple for this person to come, otherwise, Li Tianfeng will not pay so much attention.

Li Tianfeng waited for about ten minutes, and it was almost four o'clock in the afternoon when a black sedan drove over from the wide Songzhou Avenue opposite.

Turning near the gate of Tianfeng Technology Company, driving towards Tianfeng Technology Company, and gradually slowing down, Li Tianfeng knew that the person he was waiting for was coming.

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