The weather on the second day was good, the wind was mild, the sky was clear, and there was no dust, which was really good.

The climate of Sijiu City is characterized by four distinct seasons. Spring is dry, summer is hot and rainy, autumn is refreshing, and winter is cold and dry. There is a clear seasonal change in wind direction, with northwest winds prevailing in winter and southeast winds prevailing in summer.

However, due to the serious destruction of vegetation in Inner Mongolia before, the time of wind is often accompanied by wind and sand, and there is no three-north shelterbelt in these years. There was time to eat a mouthful of sand.

Not long after arriving at the office, Zhang Huifei, the head of the technical department, came to Jiang Yan's office with a large number of drawings.

Entering Jiang Yan's office, Zhang Huifei put down the drawings in his hand and said to Jiang Yan after seeing Jiang Yan: "Mr. Jiang, this is all the drawings of the machine tools in the workshop of our research institute. ”

Jiang Yan looked at the drawings on the table, and without me saying anything, his two eyes stared at Zhang Huifei, waiting for his next words.

Seeing Jiang Yan looking at him, he laughed a little embarrassedly, and then said: "Didn't you preside over the upgrading of the machine tool in the rolling mill next door, we thought about whether the machine tools in our research institute can also be upgraded." ”

"We're not going to produce CNC machine tools soon, we want to practice with these things first."

Jiang Yan nodded, picked it up casually, and he took the drawings of the machine tool and looked at it.

Jiang Yan found that some of these machine tool drawings were brought by the original factory, and some were surveyed and mapped, and through these machine tool drawings, it could be seen that they were not something that they thought of when their brains were hot, and it seemed that they had been full for a long time.

"Mr. Jiang, there are some things that we are not particularly sure of, and I want you to show us."

Jiang Yan nodded, upgrade the machine tool, Jiang Yan is completely agreed, many of the machine tools in the institute are older than Jiang Yan, and only some of them are new machine tools.

Jiang Yan also thought about upgrading before, but he has not been busy with other things for a while recently, and he has been busy with other things for a while, and he is talking about those machine tools to let himself go to surveying and mapping one by one, which can also annoy him, after all, these old antiques used now, some Jiang Yan has not been in contact with them at all, if there are no drawings, then he can only survey and map by himself, in that case, just surveying and mapping is busy enough.

With these drawings, Jiang Yan has a lot of strength left.

If you want to transform the machine tool, you need to redesign some parts according to these drawings, replace the corresponding parts, and then calibrate them according to the actual use.

However, what Jiang Yan is doing now is that it is necessary to unify the standards, because Jiang Yan knows that the machine tools in the entire research institute are from different countries like the previous rolling mills, and the standards are also varied.

For example, the machine tools made by John Bull now, they use their own standards to manufacture, and many times you will find that if you change to a common international standard, it is not an integer in many cases. It's not a question of one or two accessories, it's a whole thing.

If you want these equipment to use international standards, you need to make trade-offs to modify some parts. Some are simpler, such as lathes, lathes are the rotation of the workpiece, and the turning tool controls the feed through the screw to complete the turning process, and he only needs to transform the small piece of the feed to solve the problem.

But some are more complicated, such as milling machines, the workpiece of the milling machine is fixed, and the cutter is rotating, although the feed is also a tool, but the transformation is definitely more troublesome than the lathe. For example, a gantry-type milling machine, the motor of the cutter head can not only move up and down with the screw rod, but also can move along the gantry beam left and right, and the gantry can also move forward and backward along the worktable, which is equivalent to moving in six directions, so the feed in these directions needs to be transformed.

If you need to replace the screw, it will be more troublesome, and it is not easy to make a precision screw rod of two or three meters or even longer. If you want to ensure the precision of the machine tool, you have to move these places, after all, the accuracy of the screw involves whether the amount of feed is what you need.

Of course, if the machine tools are the same type, it is not a big problem, the key is that there are too many types of machines in the rolling mill, the age is too much, and the basic needs to be designed according to the situation of each machine tool, otherwise it is likely that the parts do not match, resulting in machine damage.

For a simple example, such as gears, if you design the teeth and the original gear, the angle is a little mismatched, then it is possible to directly pay for the gear, you must know that these equipment can span more than 40 years, several countries, and each country is not produced by the same manufacturer, the gear they use may be about the same size, but the different teeth may be very large, you can imagine how many problems there will be.

At this time, Jiang Yan was looking at a drawing seriously, and from time to time he was holding a pen to modify it.

The machine tool on the drawings, this one is the worst in the current condition, this is the equipment of the Mao Xiong family more than 20 years ago, using the standard of John Niu, the reason why the machine tool of the Mao Xiong family is not because their machine tool is rough and thick, resistant, and the most important point is that this machine tool is close to being scrapped, so it comes to practice even if it is broken or distressed.

However, there are a lot of problems with this lathe, the drawings Jiang Yan has seen, the design accuracy of this lathe is extremely low, it can only be used for rough turning, and the minimum feed scale of this lathe is one-fifty-fourth of an inch, which is converted to international standards, about less than 0.4 millimeters, that is, forty wires. This accuracy is a relatively large value in machining, but it is the minimum operating scale of this equipment, and it is basically useless except for rough machining.

Not to mention the spare parts, the accuracy of the accessories is also a mess, which also leads to the assembly gap is relatively large, and the largest place can be stretched into a finger.

After testing, this original 2,000-rpm spindle can now reach a maximum of 1,000 revolutions per minute.

The noise and vibration are quite large, which further affects the accuracy of the produced parts.

The motor on this machine tool has not undergone proper maintenance, and the sound is almost as good as the tractor after opening, and what is more excessive is that the casing of the motor has different degrees of damage, and some places are simply covered by iron sheets, and the shafts of the motor are somewhat eccentric, and this should also be changed.

However, the levelness of the spindle is not much of a problem, Jiang Yan asked Zhang Huifei, he said that they have adjusted this machine, but this adjustment is still a little bit of meaning.

Although this machine tool has such and such a certainty, there is one thing that is his excellence, that is, the chassis is stable enough, it is precisely because this equipment is heavy enough, resulting in the bed of this equipment, the bed base materials are very solid, that is one heavier than two. Of course, this is also the consistent style of Da Maojia equipment, loud noise, big vibration, it doesn't matter, it's no problem to directly aggravate the equipment.

In this way, as long as Jiang Yan's transformation will make the assembly accuracy up, then it is easy to reduce the vibration, and after the vibration is lowered, the machine tool will run more stable because of the solid materials, which is probably an unexpected joy.

(End of chapter)