my magic industry

Chapter 83 Rolling Mills and Precision

During the period when the steel plant was officially put into production, several high-level leaders of the alliance had confirmed the implementation of the alliance countermeasures submitted by Xia Lin.

Among them, after the establishment of the agricultural cooperative, Xinglan Industrial Park is responsible for providing iron and steel agricultural tools for the cooperative.

Iron farm tools are easy to say. With the processing capacity of steel machine tools, a pile of iron materials on the market can be processed for the cooperative in minutes. However, steel farm tools cannot be directly used for thin slabs with a length of 1m, a width of 0.5m, and a thickness of 4cm. .

夏林的设想是先通过热轧机将薄板坯热轧成20mm厚的钢板，然后通过切断机与板材轧机将这些钢板变成5-10mm厚，200-300mm宽的窄钢片。

Next, these narrow steel sheets can be directly sharpened with a machine tool, or further rolled into thin steel sheets to reduce material consumption. After sharpening, you can get very good hoes, picks, Agricultural implements and implements such as steel shovels and axes.

Therefore, Xia Lin must implement the steel processing plant as soon as possible to complete the production of narrow steel plates, short steel pipes and smooth round steel bars, which involves hot rolling mills, plate rolling mills, shearing machines, free-fall forging machines, and pipe rolling mills. research and development.

After completing the research and development of these machines, in addition to being able to quickly mass-produce steel farm implements and tools to provide a foundation for agricultural cooperatives, the Xinglan Industrial Park can also have an extremely terrifying production capacity, that is, the cold weapons of this era .

Through forging and rolling, steel processing factories can easily obtain a large number of narrow steel bars, and such refined steel can be processed into batches of long swords at will.

At that time, it might be possible to rely on this technology to reach a certain degree of cooperation with the empire's military, and drive a nail into the conservative lair.

As for the plate armor, Xia Lin still has a problem to solve, that is, the power provided by hydraulic power is not enough to drive the large rolling mill that Xia Lin wants most. This is why Xia Lin only considered producing narrow steel armor when planning the steel processing plant. The reason for the steel sheets.

In fact, as the size of the roll increases, the power required will also increase greatly, so the current steel processing plants do not have the ability to produce wide and uniform thin steel plates.

Held a research and development discussion meeting with the dwarf masters of the machine tool factory, and explained the working principle, purpose, precision requirements and main difficulties of these machines designed by himself. After that, the seven dwarf masters and Xia Lin started the research and development research and development project.

The first is a hot rolling mill that hot-rolls thin slabs produced by electric arc furnace continuous casting into hot-rolled thick plates. This machine is easy to develop.

The main reason is that the accuracy of the ten pairs of twenty rolls is somewhat demanding. If you want to roll a 40mm thick thin slab into a 20mm thick hot rolled plate, the error of the roll diameter cannot exceed 5%, that is, 1mm, otherwise the hot rolled The surface of the board that comes out will appear to be uneven with high and low.

After the hard work of the dwarf masters during this period, the machining accuracy of the steel lathes in the machine tool factory has approached this category, roughly around 1mm. What Xia Lin has to do is to help the dwarf masters further upgrade the accuracy of the machine tools, especially the most critical machine tools. The most important part - the accuracy of the guide rail.

However, the screw micrometer that improves the accuracy the most is still lying on Xia Lin's drawings. No matter how the dwarf masters process it, they can't process a thousand tiny threads on a nut that is no more than 10mm long. Therefore, Xia Lin only Can think of other ways to help dwarven masters.

After thinking hard for a while, Xia Lin quickly found a feasible idea based on his own experience.

That is to obtain extremely flat light through a dark room and light source, and then use this straight line to find the error on the guide rail of the machine tool. In this way, the error on the guide rail and other machine tool components can be found by comparing the light of the straight line. After grinding and correction, it will be A certain degree of precision can be improved.

This idea makes use of the principle that light travels along a straight line. It was used in many places when Xia Lin’s motherland was just starting to industrialize in the previous life, and it was considered the most basic laser measurement.

It’s just that this method has high requirements on the operator’s skills. Although the human eye can distinguish an error of 0.1mm, it is rare for a fitter who can manually remove the error in a dark room.

Fortunately, Xia Lin still has a group of reliable fitters. After listening to Xia Lin's explanation of the darkroom light source precision method, Master Faen nodded clearly. Master En is quite convinced by Xia Lin's words.

After walking into the darkroom with the machine tool parts, Xia Lin cast the low light technique outside the hole reserved in the darkroom, and a slender but strong light entered the darkroom through the hole.

Master Fine was a little surprised watching this scene, but the business was important, and he quickly began to polish the machine tool parts in the darkroom according to Xia Lin's instructions with the help of this said to be absolutely straight line.

After a period of truly dark work, Master Faen came out of the dark room with his eyes wide open, and he narrowed his eyes when he saw the sunlight outside, and it took him a while to recover.

"How is it? Master Faen, is this method useful?"

Seeing Master Faen, Xia Lin couldn't wait to ask.

"It is useful, but I will definitely not do this kind of thing next time. I kept staring at that light, and almost blinded my eyes!"

Master Fine, rubbing his eyes, said angrily.

"There's no way around that. Speaking of which, if we can make glass and mirrors, we can make a light focusing device in a wooden box, so that if we put a shimmering rune disc inside, maybe we can get laser light.

This kind of laser can also form the light path you just saw in the darkroom, Master Fine, in relatively sheltered places during the day. It will be much more convenient for us to measure and correct the accuracy then! "

Starting from the dark room in front of him, Xia Lin thought of another application of low-light technology, which is laser measurement.I just don't know whether the light generated by the micro-light technique can form a path in a relatively dark place on a sunny day.

Speaking of glass and mirrors, it is relatively easy to solve. In fact, Xia Lin can make glass now. Diatomaceous earth, caustic soda and lime can be used to make soda-lime glass, but the process is cumbersome, and the internal variegation and air bubbles must also be considered. .

Compared with glass, Xia Lin felt that it would be better to let the jeweler use natural crystals to polish a few transparent crystals, and find a way to get some glucose and silver nitrate, and the whole silver mirror reaction would turn these crystals into mirrors.

"Can you get that kind of light during the day? That would really help!"

Hearing Xia Lin's thoughts on laser measurement, Master Fine nodded thoughtfully and said that he has already experienced the straightness of light. If such flat and visible light can be obtained during the day, when the precision of machine tools improves, It will definitely help a lot.

The calibrated and polished machine tool parts on the other side have been assembled again. Master Fine tried to process some components again, and found that the accuracy of this machine tool has indeed been greatly improved, and the error can be controlled within 0.1mm.

In this way, with this machine tool, there is no difficulty in processing those rolls.

Soon, cylindrical pig iron rolls and other parts of the hot rolling mill were processed under the skillful hands of the dwarven masters.

The rolls designed by Xia Lin have a diameter of 200 mm and a length of 500 mm. After assembling these rolls on the frame of the hot rolling mill, a hot rolling mill with ten pairs of rolls with different gaps is completed.

Each pair of rolls will roll the thin steel slab heated in the heating furnace to a thickness of 2mm. After ten pairs of rolls, the final hot-rolled thick steel plate is 2m long, 0.5m wide, and 20mm thick.

Although it is only driven by hydraulic power, this hot rolling mill, which can only be called small and adopts continuous rolling, does not require high power, and the effect of trial rolling is very successful.

After the long thick steel plate was produced, Xia Lin was full of joy and emotion after touching the cooled steel plate. The dwarf masters were also amazed at the hot rolling machine, which flattens and rounds steel like dough. .

Starting today, the industrial park has finally taken the first step in the steel processing industry. In the future, it will not use machine tools to directly process steel billets into parts, which will cause great waste. Instead, steel materials of various specifications can be used for machining.

(End of this chapter)