Manufacturing Empire in the Valley

Chapter 94 Engine sand casting

Fang Dongping nodded with satisfaction: "It's almost done. Next, you can start working according to your respective division of labor. I will supervise from the side. If I see something that does not meet the requirements, I will point it out on the spot without mercy. Please also Don't slack off."

Han Shuren immediately waved his hand, "Mr. Fang is now the chief technical consultant of our factory. He is what he says. Do you understand?"

"understand!"

"Okay, let's get to work!"

The Sanyang Tractor Factory has reached a critical moment of life and death. The workers are very 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, and seemed to be full of energy.

Fang Dongping waved at Niu Xiaoqiang: "Xiaoqiang, follow me to learn the essentials of making a diesel engine. Feel free to ask if you don't understand anything."

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

Fang Dongping came to the molding workshop first, and Niu Xiaoqiang who followed behind entered the workshop and saw the master worker carrying sand, he was taken aback for a moment.In any case, he couldn't connect the diesel engine with the sand, so he asked, "Master, this seems to be a casting workshop, right?"

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

Niu Xiaoqiang pointed to the sand piled in the sand tank: "Why put so much sand in the mold workshop?"

Fang Dongping laughed: "When it comes to theoretical knowledge, you are pretty good at it, but when it comes to practice, you are not as good as a primary school student in the industry. This is the so-called interlacing like a mountain. To tell you the truth, all these sands are It is used to make engine molds, referred to as sand molds.”

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

Fang Dongping explained very patiently: "It is true that sand is not sticky, but we can use foreign objects to make it sticky. In order to let you better learn the manufacturing technology, master will explain it to you from the beginning."

Niu Xiaoqiang hummed, as if listening attentively.

Fang Dongping grabbed a handful of sand and showed it in front of Niu Xiaoqiang: "Observe these sand carefully. If you look carefully, you will find that they are different from the river sand or sea sand you usually see. It should be larger. In fact, these sand grains are not sand grains in the traditional sense. They are all produced by artificial crushing. The raw material is a kind of naturally formed sandstone. Sand, so if you really want to count, the 'sand mold' should be called the 'sand' mold."

Although Fang Dongping's words were a bit awkward, Niu Xiaoqiang understood it immediately, and he said, "So that's what happened."

Fang Dongping continued: "You just mentioned the problem that sand particles are not sticky. This is mainly solved by using binders. Binders can be roughly divided into two types: organic and inorganic. Organic binders are usually made of petrochemicals. Manufactured, because it can be used directly, the efficiency of making molds with organic binders is very high; inorganic binders are composed of potassium, magnesium, calcium, aluminum, silicon, sodium and other elements, and their compounds are generally silicates Hydrates such as , aluminates, etc. need to be dehydrated to be effective when used. Due to the relatively complicated process, the efficiency of using inorganic binders to manufacture molds is relatively low.”

Speaking of which, Fang Dongping picked up a bucket of chemical raw materials from the workbench: "Sanyang Tractor Factory uses organic binders. Although this thing is easy to use, its disadvantages are also obvious, that is, there are many harmful ingredients. Whether it is It is harmful to the human body and the environment, and inorganic binders do not have this disadvantage, but due to efficiency and technical problems, many domestic factories still choose to use organic binders for casting.”

Hearing this remark, Niu Xiaoqiang suddenly became enlightened, and he had a relatively intuitive understanding of engine manufacturing.

Fang Dongping changed the topic: "Actually, the automobile engine also adopts this casting method. Whether the quality of the engine is good or not has the most basic relationship with the casting mold. After using the binder to cast the shape and specifications that meet the size, the next step is to Carving sand molds is a very critical link. The more precise the engraving machine, the higher the accuracy of the sand molds carved out, so the quality of the produced engines will be better. Our country is just right in terms of precision instruments. This is one of the reasons why our country’s engine manufacturing level is so far behind Western developed countries.”

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

Fang Dongping shook his head: "We want to introduce it, but they won't sell it to you."

Speaking of which, Fang Dongping brought Niu Xiaoqiang to the sand mold engraving machine: "This is the sand mold engraving machine, which is imported from Italy. The engraving machine of this specification is a product that has been eliminated a long time ago. Even so, we want to If you want to buy it, it depends on the face of the person, and the other party will often put forward a lot of additional conditions, such as not allowing our employees to carry out repairs and maintenance, and if the accuracy is slightly higher, they will not sell it to you at all.”

Hearing this, Niu Xiaoqiang couldn't help being silent. The backwardness of manufacturing technology will lead to the backwardness of the entire industrial system, making the whole system 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? They are completely forced out."

Machines and equipment are actually substitutes for labor. No matter how far some manufacturing fields develop, labor is irreplaceable.Similarly, no matter how good workers are in some manufacturing fields, they cannot replace machines. The relationship between the two may seem contradictory, but they are actually complementary.

Niu Xiaoqiang couldn't help asking: "Master, isn't the manufacturing industry in our country always under the control of others and unable to develop?"

Fang Dongping's face immediately became serious: "Xiaoqiang, your thinking is wrong, and it is a big mistake. It is absolutely unacceptable."

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(End of this chapter)