Generally speaking, the bar stock is relatively easy to turn, there is no complex profile and curved surface, generally as long as the outer cylindrical surface is turned, this processing is the same, the sharp alloy number of turning blades accurately, easy to cut into the bar stock of this superalloy.

With a soft "hiss", the beautiful metal chips curled and jumped happily, and soon formed a long coil of chips, which then fell into the metal collection groove at the bottom of the CNC machine.

The bar, which originally had oxide scale, was turned to reveal a shiny metallic color, which looked very beautiful, and the glass of the security door of the CNC machine tool could be seen clearly.

CNC turning, controlled by the CNC program, Jin Youquan basically does not need any operation, just watch the program run.

Under the turning of the CNC external turning tool, the bar material is gradually formed, the outer circle is turned, the end face is chamfered, and then the machine tool automatically changes the tool, and the rod is turned off, the sharp cutting knife is directly cut in, the long metal chips are quickly turned down, and a deep groove two millimeters wide is formed at a speed that can be seen by the naked eye.

With a soft "clank", the bar stock is cut off and a semi-finished screw falls into the metal chip groove at the bottom of the machine. The program also stops running, and the first part is machined in about a few minutes.

Opening the safety door of the machine tool, Jin Youquan picked up the semi-finished screw from the metal chip groove at the bottom of the machine tool. The reason why it is said to be a semi-finished product is because the screw has not yet been threaded, and the screw head has not yet been processed into a hexagonal shape.

Holding this screw and looking at his first work, Jin Youquan seems to be in a good mood, the screw is slender, very bright, without the slightest burr, like a handicraft.

The screws look good, the size is all qualified, Jin Youquan himself took the measuring tool, a size, a size of the measurement, there is no zài out-of-tolerance phenomenon.

The on-site inspector also came, and after the inspection and inspection, it was confirmed that it was correct, and the first inspection of this batch of parts was completed, and the processing could be continued.

The bar material clamped on the machine tool is relatively long, and one such bar can process 20 semi-finished bolts, after processing the first bolt, Jin Youquan loosened the jaws of the CNC lathe and stretched out the bar a little in order to continue processing.

The processing of the second bolt also began immediately, re-align the tool, and after alignment, continue to process, as for the tool change? For the time being, it is not needed, the process specification is clearly written, reminding when to change the tool, and after processing to this amount, Jin Youquan will change the tool himself.

Don't change the tool according to the process specification? When entering the factory for training, the trainer talked about some classic quality cases, including one, not changing the tool in accordance with the requirements of the process regulations, resulting in the quality case of the parts digging knife.

Jin Youquan does not dare not operate according to the process regulations, besides, the process regulations are very detailed, very reasonable, very scientific, just after processing the first bolt Jin Youquan found out, and fully recognized the process in his heart, and did not dare to have the slightest idea of not operating according to the process regulations.

Do not operate according to the process regulations, unless the head is clamped by the door panel!

The processing of the second bolt, Jin Youquan strictly followed the process regulations, and the processing was very smooth, and after just a few minutes, the second bolt was also processed, and after that, it has been very smooth, the third, fourth, and fifth pieces......

In the afternoon of the next day, Jin Youquan had processed more than 100 of these semi-finished bolts, although these bolts were only semi-finished products, but without exception, all of them were processed beautifully and brightly, completely like handicrafts.

The surface is bright metallic, the surface finish is very good, and there is no burr, neatly placed in a wooden box next to the machine.

This open wooden box is a special station equipment used to hold screws, the wooden box has a styrofoam board, the plastic plate is neatly exactly 100 holes, each hole is just inserted into a semi-finished bolt, the bolt is placed in such a wooden box, neat and tidy, can effectively prevent damage in the bump.

Bumps and injuries are often occurring in the production of aviation parts, and they are also hated by everyone, and they must be prevented.

If it is a general mechanical part, there is a small bump, a small bump, may not be in the way, but it will affect the appearance, and it is not a big deal to polish it, but in the production process of aviation parts, if the parts appear bumps, sometimes it is fatal.

In particular, some key parts, important parts, bumps, even if it is a small one, less than the size of a grain of rice, the depth is only one or two small bumps, which is enough to make an aviation part downgraded or scrapped.

"Mr. Li, hello!"

Just as he was putting a semi-finished bolt he had finished processing into the open parts box, Jin Youquan happened to see Li Tianfeng coming to his CNC machine tool.

Li Tianfeng wears a helmet and overalls, which is the habit of Li Tianfeng at the production site, and he generally does not need to be accompanied, he does not need to be hugged, he is alone, and it is the same today.

Thinking that a large number of parts to be processed in the No. 1 production workshop in the past few days, and the second batch of newly recruited skilled workers have basically all been put on duty, Li Tianfeng took the time to go to the production site to take a look for himself.

I had already turned around just now, and when I saw that everyone was basically operating in strict accordance with the process regulations, and then saw that the quality of some of the processed parts seemed to be good, Li Tianfeng nodded with satisfaction.

This group of skilled technical workers, all have a wealth of experience in machining, although some people are engaged in the processing of aviation parts for the first time, but the training into the factory is not bad, as long as we operate in strict accordance with the process regulations, there will generally be no big problems, unless the process regulations are wrong.

Each process specification has a three-level signature, and most of the process regulations are personally checked by Li Tianfeng, and the probability of errors in the process regulations is generally not large.

Seeing that the CNC machine tool was processing bolts, Li Tianfeng walked straight over, and the first thing he saw was the neatly placed semi-finished bolts in the open parts box next to the machine tool, which looked very gratifying.

Seeing that the worker master of this CNC machine tool greeted himself respectfully, Li Tianfeng smiled and nodded, leaned down with great interest, personally picked up a semi-finished bolt, looked at it carefully, and after looking at it, Li Tianfeng nodded with satisfaction.

"Master Jin, the counting process of this batch of bolts is basically completed." Li Tianfeng asked with a smile.

Seeing that Li Tianfeng remembered that his name was Master Jin, obviously remembering himself, Jin Youquan's face was happy, and he immediately said happily: "Mr. Li, this batch of non-standard bolts has a total of 160 pieces, and the first number of car processes has been completed, and none of them are out of tolerance, and all of them are qualified." ”

Li Tianfeng nodded with satisfaction, such non-standard bolts, special for turboprop B engines, each engine uses 16 pieces, and 160 pieces is exactly the amount of 10 engines.

Generally speaking, the production capacity of turboprop B engines in plant E is 60 to 70 units per year, and the annual demand for such non-standard bolts is about 1,000 pieces.

The first time to process this kind of bolt, it is impossible to put in the processing of thousands of bolts at one time, in case there is a quality problem, it is not good, so the first batch of processing is 160 pieces, exactly the amount of 10 engines.

"Master Jin, the next process is to turn threads, the difficulty of this process is much more difficult than this counting process, you have to be more careful." Li Tianfeng reminded.

The number of turning processes just now, the technical difficulty is not great, and the processing is relatively easy, but the turning of threads is much more difficult.

There are many kinds of bolt threads, divided into thick threads, fine threads, and the shape of the thread is triangular, trapezoidal, etc., the non-standard bolt processed by Jin Youquan is a triangular fine thread, and the processing method is CNC turning.

There are naturally many ways to process threads, such as tapping threads with wires, turning threads with lathes, and grinding threads.

Thread turning is relatively efficient, but the difficulty is relatively large, so Li Tianfeng specially reminded Jin Youquan.

After reminding Jin Youquan, Li Tianfeng turned around and left, and he had to go to the No. 1 workshop to take a look around. Now the No. 1 workshop, the machine tools and equipment have increased a lot, the personnel have also increased a lot, there is already a look, this way to take a look, turn around, slow down, it takes a little effort.

After Jin Youquan completed the number of bolts, he completed the final inspection of this batch of semi-finished bolts, and then CNC turning of the threads.

Li Tianfeng's worries are not unreasonable, CNC turning threads, Jin Youquan immediately planted a big heel.

To process threads, it is natural to carry out a series of preparations, Jin Youquan borrowed the processing process regulations from the on-site data room, and began to prepare tools, measuring tools, etc.

Li Tianfeng walked around the processing site, thinking that the No. 2 plant was nearing completion, Sun Kang was following up the construction of this plant, and Li Tianfeng was going to take a look.

The No. 2 plant, next to the No. 1 plant, is also huge, with a width of more than 100 meters and a construction area of nearly 10,000 square meters.

Li Tianfeng walked into the huge No. 2 factory building, and happened to see Sun Kang with two people in the factory.

After chatting with the two, Li Tianfeng knew that the completion of the No. 2 plant was about before the end of the year, that is, before the Lunar New Year, this plant would be completely completed and delivered.

The cement floor of the plant is being painted, and the green epoxy resin paint floor will be as beautiful as the No. 1 plant, and the No. 2 plant after the completion will also be a precision machining plant, with two or three hundred sets of various machine tools and equipment, and three or four hundred employees, the scale is the same as the No. 1 plant.

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