Chapter 452: You’ve Exaggerated Too Much, Right?

"Boss, what do you want to see?"

When a family of three walked into a shop with the words "Gear Specialty" hanging on it, the shop owner was stunned for several seconds before tentatively stepping forward and asking Tang Zifeng.

"I said I came here to buy toys for my children, do you believe it?" Tang Zifeng asked the shopkeeper with a smile.

"Uh..., the boss is joking. The things in our store are all made of iron. They can't be used as toys for children. I can't afford to pay for any accidents." The store owner said with a grimace.

He determined that Tang Zifeng and his party must have been tired from walking and came into the store to find a stool to rest, or they might even have come in to find the toilet. He organized his words silently in his mind, thinking about how he could accurately tell Tang Zifeng the location of the nearest toilet in the most concise language when Tang Zifeng asked.

"Boss, your gears are quite complete. Is this spiral bevel gear used on McClung's heavy boring machine?"

Xiao Wenjun glanced at the store shelves, then pointed at a gear and asked the store owner.

"Sister, you have such good eyesight!" The shop owner was stunned again, and then he gave Xiao Wenjun a thumbs up and praised him sincerely. In fact, given his age, it was not an exaggeration for Xiao Wenjun to call him uncle, but he still addressed Xiao Wenjun as eldest sister.

Spiral bevel gears are certainly not a rare item, and it is not surprising that people in this industry can name them. But Xiao Wenjun was obviously dressed in high-end white-collar attire. In the shop owner's humble opinion, he felt that Xiao Wenjun might have never entered the factory at all.

But it was such a person who immediately said the name of the spiral bevel gear and recognized that this gear was used in McClung heavy boring. This could not help but surprise the shop owner.

After seeing the expert, the shop owner felt that he should be more respectful, so he changed the title of Xiao Wenjun to "eldest sister".

"Why, eldest sister has also been to the workshop?" the shop owner asked. This question actually didn't make much sense, but he really couldn't think of anything to say to chat with Tang Zifeng and his party. He couldn't tell people the location of the toilet now, could he?

Xiao Wenjun ignored the shop owner's question, but walked forward, took the gear and looked at it carefully, and then asked: "Is this gear made by your own factory?"

"Yeah, it's made by our factory. Sister, don't worry, the gears we made are exactly the same as the original ones from McCrone, both in terms of material and shape. It will definitely not delay the use of reboring. The original gears from McCrone, One costs more than 1,000 yuan, but for us, 120 yuan is enough, and if there is a problem within a year, we will come to your door to guarantee a replacement," the shop owner said.

"120 yuan a piece is not expensive. This kind of gear is quite troublesome to process." Xiao Wenjun said.

"Yes, sister, you are a knowledgeable person." The shop owner seemed to have found a soulmate. He took a moment to glance at Tang Zifeng and found that Tang Zifeng was obviously not interested in spiral bevel gears, so he decided that the female owner was the only one in the family who knew about machine tools, and the male was probably just a useless snack.

"Isn't it difficult to process this kind of arc gear? To mill this kind of gear, you must use Gleason's milling cutter head, and you also have to use original blades, which are very expensive. A set of blades will not last long It needs to be replaced with a new one, so the price of the gear is high. I think you know this, sister, right?" the shop owner said naggingly.

The people who come to the store to buy things on a daily basis are all thick and rough men. It is rare to find a beautiful woman, who is also the kind with big shoulders and round waist. The store owner has to reluctantly call them beauties. But today, this person is a real beauty. She has good looks and a good figure. She knows a lot about machine tools, which makes the shop owner feel like spring breeze, and he talks a lot more unconsciously.

Xiao Wenjun smiled slightly and said: "The machining surface of arc gears is very complex, and the design of the blade is difficult. Our country has never mastered this technology in the past, so we can only import it from abroad. However, some time ago, a Ph.D. Sheng has solved the problem of knife blade grinding, and the patent has been purchased by a domestic machine tool company. I estimate that it won’t be long before you can use domestically produced knife blades.”

"You're bringing...a doctoral student?" The shop owner opened his mouth so wide that he could almost stuff a milling cutter head into it. Anyone who can supervise doctoral students should ask for a doctoral supervisor, right? Even a person like him who works as a handyman in a third-tier city has heard how valuable a PhD supervisor is. But such a great professor actually came to his shop.

"Sister, ah no, professor, are you a professor from Dongda University?" the shop owner asked. The Dongda he mentioned refers to Dongye University, which is the highest-level university in Dongye Province.

"She is a professor from Tsinghua University. She is not very famous. She cannot compare with the professors from Dongda University." Tang Zifeng said happily from the side. Is this Versailles style?

"Tsinghua... oh, look at how long my eyes are!"

The shop owner slapped his head hard with his hand to punish the head for having a pair of ignorant eyes. He hurriedly ran out from behind the counter, gave up his seat to Tang Zifeng and Xiao Wenjun, and prepared to get them fruit, but was stopped by Tang Zifeng.

"Boss, stop working so hard. My wife is just interested in your gears and wants to ask what other gears you can make," Tang Zifeng said.

"The gears we can make, it's really hard to say..." The shop owner pretended to be distressed, scratched his scalp and said, "Boss, eldest sister, let me tell you this, as long as we are high-end We can make the gears used on the machine tools produced in Tanada Park. We can also make the gears from other places as long as you can bring them a prototype."

"Are you exaggerating too much?" Tang Zifeng said disdainfully, "Have you heard of Linyi Machine's CY100 CNC spiral groove milling machine? You can make one for me to see its main shaft gear. .”

Tang Zifeng's words are really not an argument. There are many types of machine tools, and each machine tool has multiple gears. Most of these gears are of conventional specifications, but a few are specially designed for a certain type of machine tool. The tooth shape is very particular, and the processing is not easy.

The main shaft gear of the slot milling machine that Tang Zifeng mentioned is a relatively special gear. Canglong Research Institute spent a month or two trying to design a processing method for this kind of gear. Sun Min, the director of the institute, once mentioned this matter when reporting to Tang Zifeng, and Tang Zifeng remembered it. At this time, he just used it to make things difficult for the owner of the gear store.

As for why the manufacturing of this gear is so troublesome, this is not a question that Tang Zifeng can understand. After all, he is a liberal arts student.

"I've never heard of Linyi's slotting machine..." the shop owner said with a frown. This slot milling machine from Linyi Machinery is a new product that has just been released, and the shop owner has never heard of it.

"Then you dare to say that you can make the gears on the slotting machine? I guess you haven't even seen what those gears look like?" Tang Zifeng said.

The shopkeeper nodded and said: "Boss, you are right. I really don't know what the gears of the slotting machine you are talking about look like. However, as long as you can bring us the gears, we can see how they look like." , we will definitely be able to make it.”

"Aren't you going to file it directly with a file?" Xiao Wenjun questioned.

In the early years, China imitated foreign machines and equipment, and some of the parts had very complicated processing methods. China lacked the necessary equipment and technology, so it could only imitate other people's designs and file them out bit by bit with a file. This processing method is not only time-consuming and labor-intensive, but the quality of the product cannot be compared with machine-processed products.

In recent years, CNC machine tools have been widely popularized in China. Many complex parts can also be manufactured with CNC machine tools, and the opportunities to use files have become less and less. However, when using CNC machine tools to process complex parts, you must first have a mathematical model of the part. Based on this mathematical model, the operator must input the processing parameters into the machine tool before processing can begin.

Linyi Machinery is able to produce the spindle gears on the slot milling machine because this slotting machine was developed by Linyi Machinery itself. The calculation model of the gear shape is not a secret to Linyi Machinery. But if the gear shop owner wanted to make such a gear, it would be very troublesome. Without knowing the gear tooth profile calculation model, the only way to process such a tooth profile is with the help of files and workers with good imitation abilities.

Hearing Xiao Wenjun's words, the shop owner shook his head desperately and said, "Professor, please don't accuse us wrongly. The gears we have here are all machined with machine tools. How can anyone use a file to file in this age? What's the matter? Parts filed with a file are useless at all, and we know this."

"But if you want to program on a CNC machine tool, you must have the shape curve of the gear. Are you saying that there is an expert in your factory who can calculate the curve?" Xiao Wenjun asked.

The shop owner smiled and said: "How can we afford experts who can calculate curves? When we encounter a curve that we can't figure out, we will go to Lao Sen and ask their experts to help us calculate it. The experts at Lao Sen have not seen anything. However, no matter what gear is handed over to them, what kind of steel is used, how to machine it, and how to do heat treatment, they clearly explain it.

"Things like gear curves are also provided by them. Based on the numbers they gave us, we just input the program into the machine tool to ensure that the processed gears are no different from the original ones."

"Who is Lao Sen?" Tang Zifeng asked in surprise.

The shop owner said: "He is a professor invited from abroad by Dongye University. Everyone has forgotten his real name. They just remember that there is Moriko in his name. As time goes by, everyone calls him Lao Mori. He also likes it himself. This is the name, so I also call my shop Laosen Technical Service Center. There are seven or eight foreigners working there, all of whom were invited by Toye University."