Fang Dongping nodded with satisfaction: "It's almost okay, you can work according to your respective division of labor, I will supervise on the side, if I see a situation that does not meet the requirements, I will mercilessly point it out on the spot, and please don't slack off." ”

Han Shuren immediately waved his hand, "Elder Fang is now equivalent to the technical chief consultant of our factory, what he says is what he says, do you understand?"

"Understood!"

"Okay, let's get started!"

Sanyang Tractor Factory has reached an important juncture of life and death, and the workers are well aware of this, so no one dares to slack off. After Han Shuren spoke, more than 100 technicians and workers immediately threw themselves into the intense busyness, looking full of enthusiasm.

Fang Dongping beckoned to Niu Xiaoqiang: "Xiaoqiang, then you follow me to learn the essentials of diesel engine production, if you don't understand anything, just ask." ”

Niu Xiaoqiang couldn't wait for this, he agreed with a smile, and followed behind Fang Dongping.

Fang Dongping first came to the mold casting workshop, and Niu Xiaoqiang, who followed behind, walked into the workshop and saw that the workers were carrying the sand, and he was stunned at the moment. In any case, he couldn't associate the diesel engine with the sand, so he asked, "Master, this seems to be a mold casting workshop, right?"

Fang Dongping nodded: "Yes, is there anything wrong?"

Niu Xiaoqiang pointed to the sand piled up in the sand trough: "Why do you put so much sand in the mold casting workshop?"

Fang Dongping laughed: "When it comes to theoretical knowledge, you can learn it well, but if you mention practice, you are not even as good as a primary school student in the industry, this is the so-called interlacing like a mountain, to tell you the truth, these sand are all used to make engine molds, referred to as sand molds." ”

Niu Xiaoqiang was stunned for a moment: "What? The mold of the engine is cast with sand? Master, the sand is not sticky at all, how can it be used to cast the mold?"

Fang Dongping explained very patiently: "Sand is indeed not sticky, but we can use foreign objects to make them sticky, in order to let you better learn manufacturing technology, Master will tell you from the beginning." ”

Niu Xiaoqiang snorted, looking like he was listening.

Fang Dongping grabbed a handful of sand grains and displayed them in front of Niu Xiaoqiang: "You observe these sand grains carefully, if you look carefully, you will find that they are different from the river sand or sea sand you usually see, and the volume is larger, in fact, these sand grains are not sand grains in the traditional sense, they are all artificially crushed and produced, the raw material is a naturally formed sand and gravel, and the sand mentioned here is the sand next to the word 'stone', so if you really want to count it, the 'sand mold' should be called the 'sand' mold." ”

Although Fang Dongping spoke a little awkwardly, Niu Xiaoqiang still understood as soon as he heard it, and he sighed: "So that's what happened." ”

Fang Dongping continued: "You just mentioned the problem that sand grains have no cohesiveness, this is mainly solved by using binders, binders can be roughly divided into organic and inorganic two, organic binders are usually made of petrochemicals, because they can be used directly, so the efficiency of using organic binders to make molds is very high; inorganic binders are composed of potassium, magnesium, calcium, aluminum, silicon, sodium and other elements, and their compounds are generally silicate, Hydrates such as aluminates need to be dehydrated to be effective when used, and the process is relatively complex, so the efficiency of manufacturing molds with inorganic binders is relatively low. ”

Fang Dongping said here and picked up a bucket of chemical raw materials from the workbench: "Sanyang Tractor Factory uses organic binders, although this thing is easy to use, but the shortcomings are also obvious, that is, there are many harmful ingredients, whether it is to the human body or the environment, there is damage, inorganic binders do not have this shortcoming, but due to the use of efficiency and technical problems, many domestic factories still choose to use organic binders for casting molds. ”

Niu Xiaoqiang suddenly became enlightened when he heard this, and he had a more intuitive understanding of the manufacture of engines.

Fang Dongping's words changed: " In fact, the automobile engine is also taken this way of casting mold, the quality of the engine is good, and the casting mold has the most basic relationship, after the use of binder casting to meet the size of the body specifications, the next need to carve the sand mold, this is a very critical link, the more precise the engraving machine, the higher the accuracy of the carved sand mold, so that the quality of the engine produced will be better, our country is just in the short board in terms of precision instruments, which is why our country's engine manufacturing level is so far worse than that of western developed countries。 ”

Niu Xiaoqiang couldn't help but ask: "Can't we introduce other people's advanced equipment?"

Fang Dongping shook his head: "We want to introduce, but people don't sell it to you, as early as November 1949, the developed countries in the West secretly set up an organization called 'Paris Co-ordination', which is specifically aimed at socialist countries to implement a technological blockade, and they will take restrictive measures against all transactions involving high-end technology or equipment." ”

Fang Dongping said here with Niu Xiaoqiang to the sand mold engraving machine: "This is the sand mold engraving machine, imported from Italy, this specification of the engraving machine belongs to the products that have long been eliminated, even so, we want to buy it has to look at the face of the people, the other party often puts forward a lot of additional conditions, such as not allowing our employees to repair and maintain, a little higher precision, people will not sell it to you at all." ”

Niu Xiaoqiang couldn't help but be silent when he heard this, the backwardness of the manufacturing process will cause the backwardness of the entire industrial system, and the whole system will be in a passive situation of being slaughtered.

Fang Dongping sighed: "It is precisely because of the technical blockade that we have to replace machinery and equipment with manual labor, do you know why there are so many senior fitters in our country? This is completely forced out." ”

Machinery and equipment are actually substitutes for labor, and no matter how far the manufacturing field develops, labor is irreplaceable. In the same way, there are some manufacturing fields where no matter how good the workers are, they cannot replace the machines, and the relationship between the two seems to be very contradictory, but in fact they are complementary.

Niu Xiaoqiang couldn't help but ask: "Master, if Western countries have not lifted the technological blockade, won't our country's manufacturing industry have always been controlled by others and cannot develop?"

Fang Dongping's face immediately became serious: "Xiaoqiang, your thinking is wrong, and it is very wrong, it is absolutely unacceptable." ”