Causal lottery system

Bajie ran up like a gust of wind, and his movements were not like a pig at all. Fortunately, both Ding Lang and Huang Ziqing were in good physical condition and could keep up.

The two chased a pig all the way to the vicinity of the University City. They were so tired that they almost fell down. At first, passers-by on the road thought it was a pet lost and the owner chased after it. Some enthusiastic people even wanted to stop the pig Quit, but is Bajie so easy to stop?

can not stop at all!

Fortunately, most universities are now open to the public. Ding Lang and Huang Ziqing followed Bajie and entered R University.

R University is also a famous university in China, and it is only 10 minutes walk from Capital University. Bajie entered excitedly, and Ding Lang who followed him was dumbfounded—maybe other universities let them dig things?

What Bajie found were dinosaur fossils and other things that were buried quite deep, and it was quite noisy when dug up. If it was only in a secluded place, it would be fine. The more secluded the place in the university, the more sacred it is!How many lovers hide in the depths of that remote tree-lined path in Capital University!

Not to mention places with a lot of people, things near the teaching building at the entrance of the cafeteria can attract many people just by digging.

What's more, a hundred-year-old school like R University is basically rebuilt from a cemetery, because the students have a strong yang energy and can suppress the yin energy of the cemetery.

Thinking of this situation, Ding Lang felt that the egg was broken.

Fortunately, Bajie wasn't so cheating, he ran to the side of the gymnasium and started digging.

It was already dinner time at this time, and there was no one around the gymnasium. Looking at that angle, the camera couldn't capture it. Ding Lang and Huang Ziqing squatted down to watch Bajie sniff here and there with an excited expression, and dig while he was sniffing.

The hole dug this time was not deep, even without the help of the two masters, Bajie got the thing that has been attracting him very quickly, and the two of them were already sitting on the side chatting at that time.

A piece of gold that looks blinding...

Fuck gold? !

What kind of trouble? !

Ding Lang held the piece of gold that was as big as the nail of a little finger, blushing embarrassingly.

It's not a gold mine here, and it doesn't look like it's buried deep. Someone probably secretly hid this piece of gold here, and it was dug up by Ba Jie.Looking closer, sure enough, there are still a few pieces of gold in the dug pit.

Ding Lang buried the gold back like a thief, causing Bajie to groan in dissatisfaction——Why did you bury the gold that I dug for a long time before I dug it out? !

However, it could only be obedient when the master did this. After expressing his protest by humming twice, he stopped talking.

After Ding Lang buried the gold and took a few pieces of gold, he was ready to evacuate. It was almost seven or eight o'clock now, and it would be too late if he didn't evacuate.

Now that he had arrived at the University City, Ding Lang simply went back to school, leaving Huang Ziqing holding Bajie and his heart bleeding, Nima Bajie, can you trick the master a little more, he could have dinner with Ding Lang!Obviously, he can be left to sleep at home!Even if nothing happens, it's good for him to stay and sleep!

Bajie turned his head arrogantly, who knew that the cheating state would be activated just like that.

After Ding Lang returned to school, he thought for a while and didn't go directly to the dormitory, but went to the laboratory.

He was outside all day today, and there were only a few assistants left in the laboratory. He estimated that he would leave at this time, and when he went over, it turned out that the lights in the laboratory were all dark.

He took out his key and opened the laboratory door.

To be honest, it is a very fulfilling thing to see the various experimental equipment in the laboratory gradually increasing. It was originally the laboratory of the Department of Materials Science. After the things were moved away, it was almost empty, and it was gradually filled by other equipment Man - all of these were witnessed by Ding Lang himself.

Now is not the time to be emotional, Ding Lang pulled away the stool and sat down to continue the unfinished test.

The research and development of new machine tools is still at a loss. The five-axis linkage is really complicated to manufacture. The more commonly used three-axis linkage is the X-axis, Y-axis, and Z-axis, and the five-axis is the X-axis, Y-axis, Z-axis, A-axis and The B axis, the A axis is a rotation axis around the X axis, and the B axis is a rotation axis around the Y axis.

On the worktable, after the top surface is processed by three-axis machining, the top surface can only be removed and turned over for clamping. The five-axis linkage machine is not used. After the top surface is processed, the table can be deflected by [-] degrees to continue processing. The significance of the existence of the axis is to be able to achieve high-precision work with one-time clamping and multi-face machining, and to avoid errors caused by repeated clamping. The machining accuracy that a five-axis linkage machine tool can generally achieve is from one thousandth of a millimeter to one hundredth of a millimeter. between.

Thinking of Neon and other countries that developed nine-axis CNC machine tools in the 80s, Ding Lang felt that the development of five-axis CNC machine tools was imminent.

Five-axis machine tools are really not difficult. There are many manufacturers in China that can produce them, but there are not many manufacturers that can produce five-axis linkage machine tools in China.It's rare that it's not five axes, but it's rare that five axes coordinate their actions, because their motion trajectory is a rather complicated calculation process.

90.00% of the CNC system, the core technology of CNC machine tools, needs to be imported from abroad. Most of the mid-to-high-end CNC machine tools that can be made in China are in the assembly and manufacturing process, and generally do not master the core technology.The key components and key technologies of domestic CNC machine tools mainly rely on imports.So not only the five-axis linkage, but also the CNC system is also a difficulty.

The numerical control system includes a display, a controller servo, a servo motor, various switches and sensors, which are somewhat related to Ding Lang's specialty, so he has been busy with it these two days.

It is not that the technology is not in place, but that the basic industry is backward, and we do not have our own screw, bearing, guide rail, main servo, scale feedback system... How to produce high-precision machine tools?

and many more…

Ding Lang's eyes lit up.

Many parts of CNC machine tools are made of heavy metals, because the parts required by the machine tool have a large pressure bearing capacity.But relatively speaking, the cutting of heavy metals is more difficult, and the accuracy is not easy to master.

Why not switch to light metal?For example... high niobium titanium aluminum alloy?

This inspiration can be said to be given to him by Bajie, if Bajie hadn't pulled out those few pieces of gold, he really couldn't remember it.

It's decided, I'll add another meal to Bajie in two days!

After confirming the current research direction, Ding Lang's mind relaxed a lot.It may be difficult for other machine tool laboratories to use high-niobium-titanium-aluminum alloys, but it is easy for him—the most advanced research on high-niobium-titanium-aluminum alloys in China is not Ding Lang’s laboratory ?

Although I can't say how much I need to get, there is enough for developing new parts.

Compared with those heavy metals and heavy metal alloys, high-niobium titanium-aluminum alloys are much easier to cut, and the precision control is better, but I don’t know if they can withstand the weight of the connected parts. These need to be studied slowly from now on.

Ding Lang didn't call his assistant either, he rushed to his material science laboratory by himself, took some things and left, and returned to the machine tool laboratory.

The author has something to say: The parts made of high-niobium-titanium-aluminum alloys are pure author nonsense, professionals should not spray QUQ words on the list, and then I was surprised to find that the category of this article is actually cultivation? !

After sending it out again, I closed my computer and went to sleep with peace of mind. I woke up in the morning and found that the login expired and I didn’t send it out at all #被自自己哭哭#