Standing on the exclusive deck of First Class, Karotta looked at the fading land, tears streaming down her face. She kept holding on to not cry in front of Hu Wenkai, and at this time she finally couldn't help it. Wang Changhui said cautiously: "My sister-in-law will come back in less than a few months, and I will stay in the United States for four years." ”

"Changhui, you don't understand, I'm afraid that he won't know how to take care of himself if I'm gone, and he will take risks if he's not careful. Last time I ran to the front line in Cangzhou, this time I was not at home, who knows what he will do. ”

"Your brother is such an adult, if you don't supervise him by the side, you won't even eat on time, you only wear that set of clothes, and your shoes will never be cleaned."

Laughing as he spoke, thinking of Hu Wenkai's usual sloppy appearance, he covered his mouth and giggled.

"Sister-in-law, what are you laughing at? Did you think of Brother Wen Kai? ”

"Mmmm, I'm thinking about his own stinky appearance, and he has to take a shower every day without changing his clothes."

"Brother Wen Kai is so dirty."

Wang Xiwen said from the cabin: "Men are like this, Lao Yi is normal to not change clothes for a week, and when he was not married before, his clothes were dirty and he wore them for another week." ”

Wang Xiaomei was packing her luggage and said to Lina: "The three of them were criticized for their bosses outside, men are handsome if they have ideas and courage, even if they don't have clothes to wear, they are attractive." ”

"Manager Wang, you won't take a fancy to the boss, there must be a first-come-first-served person in this matter, Eva and I are in front of you, we have booked." Lina is not allowed at all.

"Lina, why aren't you irritable, the girl's house is still booked, you think you buy something, I won't tell you."

"My life and Eva's are the boss's, and no one in this life has been as good as the boss has been to us. Without a boss, the two of us would have died in the Far East. ”

"Lina, you're not love, it's repaying kindness, don't get confused." Wang Xiaomei patiently explained what love is.

True love should have a sense of pride in the other person, you will appreciate everything about the other person, including the internal and external conditions and advantages, and the other person will also make you feel that he is proud of you everywhere. If that feeling exists, whether he succeeds or fails in doing it, you will appreciate his talent rather than just the result.

Eva whispered, "The boss isn't proud of us, we're proud of him." ”

Wang Xiaomei put her arm around her shoulders and said, "That's right, you are unrequited love." The boss has no love for you. ”

"Manager Wang, you are also unrequited love, and the boss has no love for you. Don't laugh at us. Lina blurted out, Wang Xiaomei stopped talking and lowered her head to tidy up her wardrobe.

After Hu Wenkai set up a banquet for the teacher in the evening, he drew the oblique piercing technique in the secret room of the study, which was already a rotten process on the street, and the computer did not open the pure manual drawing, the top is the key to add 0.1% rare earth can significantly refine the grains, effectively remove the gas and harmful elements P and S in the steel, and purify the molten steel. As long as he doesn't get up and doesn't complete the expected tasks, he won't feel tired, and a cup of strong tea and two packs of cigarettes will not be finished until 3 o'clock in the morning.

Sleeping in the back of the car, Bykov carefully parked the car in front of the auditorium.

"Boss, it's in front of the auditorium."

"Oh, you send my business bag in, I'll go wash up first."

There were three or four hundred people sitting in the dark hall in the auditorium, where did so many people come from.

"Hu Bin, how did you inform me? How did so many people come? ”

"The boss notified according to your instructions, and I also screened it, and it is estimated that there will be thousands of people without screening, and the number of technicians in a year has already exceeded 2,000."

Hu Wenkai patted the microphone and concisely threw out today's three key topics.

"I have convened you today to discuss the construction of a seamless steel pipe plant with a high degree of automation, a fertilizer plant with a high synthesis rate and the development and research of new electron tubes. All of you are the technical backbone of the company, and I believe you all know the importance of these three topics. ”

"The first agenda is the seamless steel pipe factory, we have been able to produce seamless steel pipes in Tianfen, please ask the technicians of Tianfen base to produce seamless steel pipes to talk about the current process first."

Usually have a lot of contact, Hu Wenkai takes a question and answer method to solve technical problems every time in the Tianfen base, so the technician does not have stage fright to stand up and take the microphone.

"We now use manual operation of seamless steel pipes, specifically to train the billet into a cylindrical steel body, fix it with grabbers, and use carbon steel rotary rod cone drilling, which can produce six qualified products a day. The rod is scrapped after three uses, so the cost of the seamless steel pipe we produce is 20% lower than the price of the seamless steel pipe bought from the United States. ”

Hu Wenkai motioned for him to sit down: "The production efficiency is very low, the yield is very low, and the cost is very high. I summarize three points, and below I show a large oblique rolling and perforating machine with a high degree of automation. Before that, I would like to elaborate on the application of seamless steel pipes. ”

"A seamless steel pipe is a long strip of steel with a hollow cross-section and no joints around the perimeter. Steel pipes have a hollow cross-section, and are widely used as pipelines for transporting fluids, such as pipelines for transporting oil, natural gas, gas, water and some solid materials. Compared with solid steel such as round steel, steel pipe is lighter in weight when the bending and torsional strength is the same, and it is an economical cross-section steel, which is widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipes, automobile drive shafts, bicycle racks and steel scaffolding used in building construction. The manufacture of annular parts with steel pipes can improve the utilization rate of materials, simplify the manufacturing process, and save materials and processing man-hours, such as rolling bearing rings, jack sleeves, high-pressure boiler tubes and gas cylinder tubes, etc., can be manufactured with steel tubes. Steel pipes are also an indispensable material for all kinds of conventional weapons, and gun barrels and barrels are made of steel pipes. ”

"The bottleneck restricting the output of seamless steel pipes is nothing more than perforation, and the process is divided into these parts: pipe blank heating, →high-pressure water descaling, → heat centering, → perforation, → rod removal, → blowing borax, nitrogen protection, →ejector rod circulation"

Hu Wenkai wrote the seven-step process in beautiful regular script on the blackboard, patted the chalk ash in his hand, picked up the microphone and continued.

"I don't need to talk about billet heating and high-pressure water descaling."

Zhou Haiquan stood up and said, "Boss, you should say it again, because the use of mechanized production is different from manual production." ”

"Yes, it is different, we use hydrogen combustion heating to control the temperature at 1560 degrees, the specific heating time should be different, the time of the body is different, which requires your technicians to get the parameters, high-pressure water phosphorus removal must be clean soft water, with 5 Pa to wash the surface of the body."

"Here's the key, don't hesitate to ask questions if you don't understand." Hu Wenkai sketched a rough diagram of the punching machine on the blackboard.

"In the diagonal rolling perforation process, the rolls with a double conical shape rotate in the same direction to form a feed angle with the rolling line. The billet is driven by the roll to rotate along the longitudinal axis. Since the rolls are arranged at an angle, the billet moves forward longitudinally during rolling, and the outer diameter and cross-section are reduced at the same time. During the longitudinal advance, the blank is forced to be perforated by perforated heads between the rolls, after which the wall thickness of the perforated capillary is further reduced and the outer diameter is enlarged. The reduction of the diameter of the billet during rotation causes a favorable stress state on the rolling piece. ”

Let people hang the drawings drawn up all night on the wooden board, point to the drawings and say: "You can go to the stage and look at my design drawings carefully, and say that it is an exchange meeting, and if there are any good suggestions and suggestions on the spot that you don't understand, you can learn from each other." ”

As soon as the voice ended, the people in the audience had already run up, and said while watching: "The roll gap between the work rollers will be surrounded by fixed guide plates or driven guide plates, and these guide devices will prevent the radial deviation of the rolling piece. ”

"Zhou Haiquan, you see that the design of the enclosed mechanical guide for the rolled piece and the ejector rod outside the deformation zone can obtain stable and high-precision wall thickness tolerances over the entire length of the rolled piece during the oblique rolling perforation."

"With a two-roller arrangement, the perforated capillaries have a high uniformity of wall thickness, a long tool life and a high degree of geometry flexibility. Why didn't we come up with such a method? ”

Hu Wenkai estimated that it would take at least more than an hour for so many people to read them all, and after taking a sip of tea, he walked out of the auditorium to arrange for the canteen to prepare more lunch today and send it to the auditorium to have a meeting while eating.

The problem focused on the deformation of the long body after being squeezed by the drill pipe, and Hu Wenkai drew the deformation area on the blackboard.

"Because the distance between the roll surface and the head surface is gradually reduced, so the capillary wall thickness is rotated while pressing, so it is a continuous rolling process, the deformation parameters of this section are expressed by the relative amount of pressure on the diameter, the metal that is pressed down on the diameter can also flow to the transverse and longitudinal flow, but the transverse deformation is prevented by the guide disk, and the longitudinal extension deformation is the main one. The action of the guide disc not only limits the lateral deformation, but also pulls the metal in an axial direction, which, as a result of the lateral deformation, has an elliptical cross-section. ”

The technicians in the audience suddenly realized that the guide plate turned out to be this function. Hu Wenkai continued to draw the rolling area.

"Rolling area, the role of the area is to roll equalization, improve the dimensional accuracy of the pipe wall and the quality of the inner and outer surfaces, because the head bus and the roll bus are approximately parallel, so the amount of pressure is very small, mainly play the role of equalization. The cross-section of the rolled piece is also elliptical in this section and gradually decreases. ”

Two or three technicians stood up and asked, "Boss, this design can be mechanized for production, but the drill pipe is estimated to be replaced after three times, and it still can't improve the speed and reduce the cost." ”

Hu Wenkai motioned for them to sit down, turned around and wiped the blackboard, and drew a long hollow drill pipe with chalk in his hand.

"You're right about the drill pipe is the key, and the key of the key is on the top of the drill pipe."

Turn around and draw several head shapes on the blackboard, with stepped shapes, tapered and curved inner hole heads.

"During the perforation process of the head, the head is subjected to alternating thermal stress, friction and mechanical force, and the size of the force affects the life of the head. Excessive wear of the head will scratch the inner surface of the capillary, and the steel will be folded inward. The head is generally rolled, forged or cast steel. When handling the head, the oxide layer on the surface should be protected to avoid falling off, otherwise the service life will be affected. The replacement standard is when the head of the head is worn, the length of the wear belt is more than 5mm, and the damaged area is more than 30cm2; cracks appear in the perforated section; The crack length is more than 60mm, and the width is about 1.0mm. ”

"The water spray hole in the shape of the nose of the head and the concave part of the transition of the rolling section not only improves the cooling conditions of the head and the working section, but also continuously renews the oxide film, separating the perforated high-temperature metal from the head metal to play a role in heat insulation and lubrication. In addition, ensure that the cooling water pressure is kept above 1.0~1.5MPa, which has a good cooling effect and can prolong the service life of the head."

Let's talk about it again, why didn't I think of cooling the head with water, or the boss dared to think about it.