But looking at it, in terms of appearance and metal content, this stone does not have the characteristics of a meteorite.
Wu Tian said: "We are looking for a job, so go find it quickly. Take this thing and hand it over to any research institute."
Duan Zhu said: "Then leave it in the hotel first. If you see any research institute, take it there."
They heard that there were many types of equipment in the machinery manufacturing plant and came to the machinery manufacturing plant.
The gate of the factory is very grand. Looking inside, there are green areas on both sides, an office building in the middle, and more than a dozen large factories behind it.
When they arrived at the office building, Tao Decai came out to greet them and took them to the conference room.
Tao Decai said: "Are you here for internship?"
Wu Tian said: "For internship, I also want to learn various equipment."
Duan Zhu said: "I heard that you have quite a lot of mechanical processing and heat treatment equipment."
Tao Decai said: "Yes, we have quite a lot of equipment near this city."
Wu Tian said: "I want to see what equipment is available."
Tao Decai said: "Let's have a simple interview first, and then we can start the internship."
Wu Tian said: "Okay. Just ask."
Tao Decai asked: "How to use the remaining metal materials?"
Duan Zhu said: "The remaining materials produced by shearing can be used to produce small parts, reducing discarded sheets and improving material utilization. The remaining metal materials can be reused after melting at high temperatures. Other parts of the large metal blanks can be Make small parts.”
Surplus materials can be used. If arrangements are made at the beginning of manufacturing design, one blank can be used to design a variety of different parts from the perspective of improving utilization.
Tao Decai asked: "What are parts, components, and machines?"
Sun Shiji said: "Parts refer to individual indivisible parts in machinery. They are the basic elements of the machine and the basic units in the machinery manufacturing process. For example, screws, gaskets, etc. Components are replaceable parts that actually exist in the system. , it implements a specific function, conforms to a set of interface standards and implements a set of interfaces. For example, crank, base, etc. A component is a part of the machine and consists of several parts assembled together. For example, gearbox, engine, etc. "
For example, there are 3 blanks, 1 is the largest, 2 is the second, and 3 is the smallest. ABC is a large part, DE is a small part, the first blank design part is ADE, the second blank design part is BDE, and the third blank design part is CDE. This makes use of leftover materials.
Looking further, the first blank design part AD and 1 E, the second blank design part BD and 2 E, the third blank design part CD and 3 E. Different blanks have different numbers of parts designed.
Looking further, the first blank design part A, 1 D and 1 E, the second blank design part B, 2 D and 2 E, the third blank design part C, 3 D and 3 E. The number of different parts designed for different blanks is different.
Tao Decai nodded, indicating that they were still very thoughtful and creative.
Tao Decai said: "What are the methods of mechanical processing and heat treatment? We have the corresponding equipment."
Wu Tian said: "General heat treatment, surface heat treatment, chemical heat treatment, etc."
Common heat treatment: (1) Annealing: heating, heat preservation, and furnace cooling. It is generally arranged after forging and casting and before rough cutting to eliminate certain defects caused by the previous process and prepare the structure for subsequent processes. (2) Normalizing: heating, heat preservation, air cooling. Annealing and normalizing are preparatory heat treatments, which can improve cutting performance. (3) Quenching: heating, heat preservation, cooling with water, oil or salt water. Purpose: To improve the hardness and wear resistance of parts and strengthen materials. However, after quenching, internal stress occurs and the material becomes brittle and must be tempered. (4) Tempering: eliminate internal stress, stabilize the structure, adjust performance, and achieve the hardness required by the design drawings.
Surface heat treatment: A heat treatment process that only heats and cools the surface of steel without changing its composition. Purpose: To improve the hardness and wear resistance of the surface layer of parts.
Chemical heat treatment: A heat treatment process in which steel parts are placed in an active medium at a certain temperature to allow one or several elements to penetrate into its surface and change its chemical composition and structure to improve surface properties and meet technical requirements.
Tao Decai said: "There are these methods of mechanical processing and heat treatment, and we have the corresponding equipment."
Wu Tian said: "Do you have laser processing equipment?"
Laser processing is high-energy beam processing that uses a laser beam with high energy density to melt, vaporize and evaporate the workpiece material to remove it.
Tao Decai said: "We also have laser processing equipment. The principle is this, the laser beam irradiates the material; the material absorbs light energy; the light energy is converted into thermal energy to heat the material; the material is removed or destroyed through melting and vaporization."
The characteristics of laser processing are: the power can be very large and any material can be processed. It has good collimation and can be used for precision micro processing. Laser processing is non-contact processing. The processing device is relatively simple. But it is a kind of thermal processing, and there are many influencing factors.
“You can learn a lot by interning with us.”
"That's good. Going from school to the workplace requires such a stage of contact with actual production."
"Then let's take a look at it."
"Okay, you can work here recently. There is a dormitory building behind. During the internship, you will be paid internship wages."
Entering the mechanical processing factory for a visit, there is a large space inside, and you can see the exit on the other side of the factory from a distance. The factory floor is painted green, and a dozen workers are busy operating machines.
The green paint on the factory floor is called epoxy floor paint. Its main function is to prevent sand and dust and facilitate cleaning. It can achieve anti-static effect under special requirements. Epoxy floor paint has the characteristics of strong acid and alkali resistance, wear resistance, pressure resistance, impact resistance, mildew resistance, waterproof, dustproof, anti-slip, anti-static and electromagnetic wave resistance. There are no connecting seams. Specifically, there are epoxy self-leveling floor coating systems that require bright and clean colors, epoxy super-wear-resistant floor coating systems that require load-bearing, pressure-resistant, and wear-resistance, and epoxy anti-static self-leveling floor coating systems that require anti-static acid and alkali resistance. The installation system requires an epoxy colored sand self-leveling floor coating system with high-end decoration and artistic colors, an epoxy anti-corrosion floor coating system that requires heavy anti-corrosion, and a vibration-free, non-slip and wear-resistant epoxy anti-slip ramp floor. Coating system, epoxy inorganic floor coating system that requires fire protection level A, etc.
Taking a closer look, there are some CNC machines used for milling, conveyor systems, and stacking systems.
"This is a processing workshop, and there are several similar processing workshops over there."
Several other workshops have various CNC machine tools, laser processing centers, and welding robots. The processing equipment and electromechanical equipment here are sufficient. The three of them are willing to stay for internship.
