"Boss, what are you looking for?"

When a family of three walked into a shop with the words "Gear Monopoly" on it, the shopkeeper was stunned for a few seconds before he tentatively stepped forward and asked Tang Zifeng.

"I said I came to buy toys for the child, do you believe me?" Tang Zifeng asked the shopkeeper with a smile.

"Uh...... , the boss joked, the things in our store are all iron lumps, how can they be used as toys for children. I can't afford to pay for a little bumping casually. The shopkeeper said with a bitter face.

He decided that Tang Zifeng and his party must be tired of walking, and it is possible to enter the store to find a stool to rest, or even to enter the door to find a toilet. He silently organized the language in his heart, thinking about how he could accurately tell Tang Zifeng the location of the nearest toilet near Tang Zifeng in the most concise language when Tang Zifeng asked for a while.

"Boss, you're quite full of gears. This arc bevel gear is used on McClun's heavy-duty boring machine, right?"

Xiao Wenjun's gaze swept over the shelves of the store, and then he pointed to a gear and asked the shopkeeper.

"Eldest sister has good eyesight!" The shopkeeper was stunned again, and then gave Xiao Wenjun a thumbs up and praised sincerely. In fact, with his age, it is not an exaggeration to let Xiao Wenjun call him an uncle, but he still respectfully calls Xiao Wenjun an eldest sister.

Bevel gears are certainly not a rare item, and it's not surprising that anyone in the business can name them. But Xiao Wenjun is obviously dressed in a high-end white-collar outfit, and in the humble opinion of the shopkeeper, he thinks that Xiao Wenjun may not have entered the factory at all.

But such a person, with one mouth, said the name of the arc bevel gear, and recognized that this gear was used by McClung for heavy boring, which could not but surprise the shopkeeper.

Seeing the connoisseur, the shopkeeper felt that he should be revered, so he changed the title of Xiao Wenjun to "eldest sister".

"Why, the eldest sister has also been down to the workshop?" asked the shopkeeper. This question is actually not very interesting, but he really can't find anything to talk to Tang Zifeng and his party, so he can't tell people the location of the toilet right now, right?

Xiao Wenjun ignored the shopkeeper's question, but stepped forward, took down the gear and looked at it carefully, and then asked, "This gear is made by your own factory?"

"Well, it's made in our factory. Sister, don't worry, the gear we made, whether it is the material or the shape, is exactly the same as the original McClown, and it will never delay the use of heavy boring. McClung original gears, one costs more than 1,000 yuan, ours, 120 yuan is enough, and if there is a problem within a year, we will come to the door to replace. The shopkeeper said.

"120 yuan a piece, it's not expensive. This kind of gear is quite troublesome to machine. Xiao Wenjun said.

"Yes, eldest sister, you are a knowledgeable person. The shopkeeper seems to have found a soulmate. He glanced at Tang Zifeng in a hurry, and found that Tang Zifeng was obviously not interested in any arc bevel gear, so he decided that only this hostess in this family knew machine tools, and the man was estimated to be a waste snack.

"Isn't it very difficult to mill this kind of arc gear? To mill this kind of gear, you have to use a milling cutter from Gleason, and you have to use an original cutter strip, which is very expensive. It won't take long for a set of blades to be replaced with new ones, so the price of the gears is high, and I think you know this, big sister, too?" the shopkeeper said naggingly.

The people who come to the store every day to buy things are all rough men with five big and three thick, and it is rare to have a woman, who is also the kind with big shoulders and round waists, and the shopkeeper has to reluctantly call them beauties. But today, this is a genuine beauty, good looks, good figure, and a good understanding of the machine tool, which makes the shopkeeper feel like a spring breeze, and he will say a lot unconsciously.

Xiao Wenjun smiled slightly and said: "The processing surface of the arc gear is very complex, and the design of the knife bar is difficult. However, some time ago, a doctoral student I took has solved the problem of grinding the knife strip, and the patent has been bought by a domestic machine tool company. It is estimated that it will not be long before you will be able to use domestic blades. ”

"You brought ...... Ph.D. student?" The shopkeeper opened his mouth so wide that he could almost fit a milling cutterhead straight in. If you can take a doctoral student, you should be called a doctoral supervisor, right? How valuable a doctoral supervisor is, even a person like him who works in a third-tier city has heard of it. But such a big professor actually came to his shop.

"Sister, ah, no, professor, are you a professor at the University of Tokyo?" asked the shopkeeper. By Todai, he was referring to Dongye University, which is the highest-ranking university in Dongye Province.

"She is a professor at Tsinghua University, the kind that is not well-known, and she is not as good as a professor at the University of Tokyo. Tang Zifeng said happily next to him, this is Versailles style, right?

"Tsinghua ...... Oh, look at my eyes, how they look!"

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

"Boss, don't be busy, my daughter-in-law is interested in you 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 shopkeeper pretended to be distressed, scratched his scalp, and said: "Boss, big sister, I'll tell you so, as long as it is the gear used in the machine tool produced in our Gaotan Park, we can make it." Gears from other places, as long as you can take a shape, we can make them. ”

"Your cowhide is blowing too much, isn't it?" Tang Zifeng said disdainfully, "Have you heard of the CY100 CNC spiral groove milling machine of Linyi Machine, its spindle gear, you make one for me to see." ”

Tang Zifeng's words are really not a lifting bar, there are many types of machine tools, and there are multiple gears on each machine tool. Most of these gears are conventional specifications, but a few are designed for a certain type of machine tool, and the tooth shape is not easy to process.

The spindle gear of the groove milling machine mentioned by Tang Zifeng is a special gear. At the beginning, in order to design the processing method of this gear, the Canglong Research Institute tossed back and forth for a month or two. Sun Min, the director of the research institute, once talked about this when he reported to Tang Zifeng, and Tang Zifeng remembered it, and at this time, he just took it out to make things difficult for the owner of the gear shop.

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

"The slotting machine of the Pro Yi machine...... , I haven't heard of it. The shopkeeper said with a frown. This slot milling machine of Linyi machine is a new product that has just come out, and the owner has indeed never heard of it.

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

The shopkeeper nodded and said, "Boss, you're right, I really don't know what the gears of the groove milling machine you are talking about." However, as long as you can bring its gears and give us a look, we can definitely make it. ”

"You don't just take the file to file, do you?" Xiao Wenjun questioned.

In the early years, China imitated foreign machinery and equipment, and the processing methods of some parts were very complicated, and China lacked the necessary equipment and technology, so it could only file it out little by little with a file according to the appearance of others. This process is not only time-consuming and labor-intensive, but the quality of the product is not comparable to that of machined products.

In recent years, CNC machine tools have been widely popularized in China, and many very complex parts can also be manufactured with CNC machine tools, and the opportunity to use files is becoming less and less. However, the use of CNC machine tools to process complex parts, first of all, there must be a mathematical model of the parts, and the operator must input the processing parameters into the machine tool according to this mathematical model, so that the processing can begin.

The fact that Linyi Machine can produce the spindle gear on the slotting machine is because this slotting machine is developed by Linyi Machine itself, and the calculation model of the gear shape is not a secret to Linyi Machine. But the owner of the gear shop had a lot of trouble if he wanted to make one of these gears. Without knowing the calculation model of the gear tooth shape, the only way to machine such a tooth shape is to use a file and a worker with good imitation ability.

Hearing Xiao Wenjun's words, the shopkeeper shook his head desperately and said, "Professor, don't wronged us. The gears we put here are all machined by machine tools. What years have it been now, and how can there be any such thing as filing with a file? The parts that have been filed with a file cannot be used at all, and we know this. ”

"However, if you want to program on a CNC machine, you have to have the shape curve of the gear, do you mean, there are masters in your factory who can calculate the curve?" asked Xiao Wenjun.

The shopkeeper smiled: "How can we afford to raise 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. The experts there in Lao Sen, they have never seen anything, no matter what gear is handed over to them, what steel is used, how to do machining, how to do heat treatment, people say it clearly.

"Gear curves and things like that, too, are provided by them. We can feed the program into the machine tool according to the number they give to ensure that the processed gears are no different from the original. ”

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

The shopkeeper said: "It's a professor invited from abroad by Dongye University, what is his real name, everyone forgets, just remember that there is a forest in his name, and everyone calls him Lao Sen." He himself likes this name, so he also calls his shop Lao Sen Technical Service Center. There are seven or eight foreigners working there, all of whom were invited by Dongye University. ”