Wen Chengtai was a little disappointed, but still agreed with Jian Xunlou's statement, "Okay, but I can remind you that next week is Wen Dailin's birthday, don't you forget to buy a gift?" I had to celebrate my birthday with Wen Dailin that day, and Wen Dailin told me several times. ”

Chongzhen Emperor Zhu Youzhen sighed, still looking at the gear that Professor Gu Luo Tu came out of just now, it was too delicate! Absentmindedly, he said, "Okay, aren't you my assistant?" You can arrange it for me. ”

Wen Chengtai Khan, you are really the life of the young master? Although Zhan Xun Lou and him are like brothers, Wen Chengtai doesn't know why the longer he stays with Jian Xun Lou, the more he feels that the relationship between a eunuch and the emperor is like that of a eunuch and an emperor? I smiled amusedly.

"Then, that's what you said, when the time comes, no matter what gift I choose, you don't have an opinion, right?" Moon Sung-tae blinked.

Chongzhen Emperor Zhu Youzhen smiled slightly and nodded, "No matter what kind of gift, you will never give your sister something bad, right?" However, I have a request, you can't send sensational things, it's too sensational, I'll just say that you picked it for me. ”

Wen Chengtai shook his head, "It's not sensational, but you must not say that it was the gift I chose, otherwise I would be angry, why don't you want to think about it, if my sister knew that I bought the birthday gift you gave her, how sad would she be?" ”

Chongzhen Emperor Zhu Youzhen nodded, "A word is a certainty." ”

Chongzhen Emperor Zhu Youzhen returned to the villa, and did not go to the hall to eat, but asked Wen Chengtai to take the meal to his own real room to eat, which had been made like a factory by him!

The tooling system moves on the guides. in order to process what you want. Otherwise, only one circle can be machined. And not a 3-dimensional thing.

However, if the guide rail is uneven, the accuracy of the processed things can be imagined, so the guide rail is a very important part of the machine tool. How does it do it? A boy said that it was made with a grinder. Wrong, its rough processing is a grinding machine, and finishing is actually done by hand. The workers take something that resembles a small shovel, and when they find anything uneven with a leveler, they use a small shovel to shovel there. A guide rail has to be shoveled for several days, and the final guide rail is densely covered with patterns, in fact, this is the trace of shoveling.

With the improvement of the performance of the grinding machine, some ordinary machine tools are no longer used to manually shovel, but are directly ground out. But precision machine tools are still shoveled out by hand. Therefore, the role of an experienced mechanic is clear here.

Since the tail top is not available on every type of machine, it is not much to say here. However, in a lathe, because the center of the ejector pin must be aligned with the center of rotation of the spindle of the lathe, it is matched with the bed. In the past. If the tail top is broken, the lathe is basically scrapped. The role of an experienced mechanic is also very, very obvious.

After an afternoon of studying with Professor Gu Luotu. Chongzhen Emperor Zhu Youzhen seems to have suddenly opened up a lot, many vague and vague, and some clear concepts, have begun to become clear, a master is a master, and many truths can be taught imperceptibly in practice!

Chongzhen Emperor Zhu Youzhen thought of manual processing? Isn't the sign of an industrial hen a machine to make a machine?

That's right, industrial hens are indeed machine processing machines compared to the handicraft workshops of the agricultural era. But manual machining has never been withdrawn from the machinery industry. As mentioned in the previous sections, the guide rails of a good machine tool are shoveled out manually. There is also a column, which may be more profound for everyone's understanding, the dynasty has introduced a set of diesel engine production lines from the independent country, and after putting it into production, it was found that our products are more noisy than the original factory produced in the independent country, and the vibration is big. We have to fix it when we display it, otherwise it will move, and the solitary ones don't need to be fixed. Not only that, but ours is leaking oil!

In machining, manual work has always been a very important link. In the earliest days, most of the production process of machine tools was manual, and the later on, the manual work became less and less, but the manual was just withdrawn from ordinary processing, and there were still many flexible and high-precision links.

Flexibility. Until now, due to the storage of wisdom, manpower is still the most flexible, and there is no tool that can compare with it.

In the application of lathes, there is a link that profoundly shows this. We know that the workpiece can only be machined if it is stuck in the gripper, and due to economic and other considerations, this part is first roughed on an ordinary lathe, and then finished on a precision lathe. Now the question is, this part is loaded and unloaded on the fixture twice, can it coincide with the first installation center after the second installation?

If it does not coincide, the amount to be processed between the two processes must be kept large. There is more trouble, if the clamped part is also to be processed, how to ensure the concentricity of the two processing? So in the past, these completely relied on the manual work of the workers to ensure that after the worker master installed the workpiece on the claw plate, first let the lathe rotate at low speed to see if it is concentric, if it is different, stop the machine and use a wooden hammer to knock the workpiece from the side, and then turn on the machine at low speed, and then check.

and finally until the human eye cannot distinguish different minds. When I was in school, the teachers repeatedly emphasized that the number of installations on the fixtures during processing should be reduced as much as possible. Of course, today's machining centers have solved the problems caused by multiple installations on fixtures, and some have achieved that the finished parts can be processed with only one installation.

When installing the screw rod of the machine tool, the average person installs it is unqualified, and there is a "astringent" phenomenon at every turn when the knife is walked, but in the hands of experienced masters, the knife is easy from beginning to end, which is the difference.

What is the true contact area between the bearing and the shaft? We generally say that two planes are in contact, but not the whole plane is in contact, in fact, only a part of it is in contact, and the same is true for bearings and shafts. Therefore, the force is no longer uniform, and this problem strictly affects the force, wear, and life of both parties. Therefore, in places with large loads and high speeds, the bearing and shaft use interference fit to ensure the contact area. So how do you measure this contact area? It's very simple: apply something like red potion to the inner ring of the bearing, attach the bearing to the shaft, and then remove the bearing from the shaft and look at the red-stained part of the shaft. Of course, this process is very simple to say, but it must be operated by an experienced master. (To be continued......)