Chinese entertainment for engineering students

"What's the noise outside? There are many people." Wang Xu's eyes were covered with a piece of red cloth.

"What do you think?" Wang Fei's voice was still so nice, cold and sexy.

"That day you used a piece of red cloth to cover my eyes and the sky. You asked me what I saw? I said, I saw happiness." Wang Xu sang deeply.

"Playing with treasures!" Wang Fei said with a half-smile, and tightened Wang Xu's red cloth in her hand.

"Here it comes, here it comes, my surprise is here." Wang Xu continued to play tricks.

He was really excited. Although he knew that Wang Fei must have bought him a car, he had no idea what it was because he had almost never talked about cars with Wang Fei.

Well, that’s not right either. Wang Xu and Wang Fei once thoroughly complained about all existing cars, and the conclusion they came to was one word: ugly.

It's either that ugly or that ugly. Anyway, there's no one he can like.

Do you think in an era when Santana can be called beautiful, what else can Wang Xu look at?

In fact, this is also related to the development of industry, but the core that limits the development of automobile styling is not the automobile industry itself, but the computer industry.

The shape of the car is formed by wrapping the body with iron sheets outside the body. Both the body and the outer skin are welded from iron sheets, and these iron sheets are punched out by a stamping machine.

This means that before building a car, a mold must be made first.

Before the birth of three-dimensional modeling, how did people build cars?

First use clay to build a one-to-one scale model of the car, then use a wooden soft ruler to draw it bit by bit with very fine grid contours, and then input it into the computer to form a three-dimensional model, which is for subsequent digital processing. Prepared.

Then turn over the fiberglass mold on the clay model, then repair the mold, then turn over the plaster mold, then repair the mold, then turn over the sand mold, then repair the mold, three consecutive processes of turning over and repairing the mold, then you can get a mold that can pour molten steel mold.

Only then can high-quality alloy mold steel molten steel be poured, and then it needs to be forged to increase strength, and then digitally programmed for cutting.

The programming process is very complex and cumbersome, and because the wooden tape cannot be bent into a large arc, this requires that the curvature of the entire car's surface must not be too small and the shape must not be too complex.

The car body is more troublesome. It not only needs to design the shape, but also consider various load-bearing, impact, twisting, bending and other forces. This requires the use of computers to perform very complex force analysis and calculations.

After that, it has to be manufactured according to the previous steps, and then various experiments are repeated. Once the test fails, it has to be improved and repeated, and the previous process is repeated. The design cycle of a car can take several years, and most of the time is spent here.

Therefore, it takes years and billions of money to go from design draft to final mass production of a car.

A complete set of automobile body stamping dies can easily cost hundreds of millions of dollars.

In this era, a model is often used for several years or more without being easily replaced, and a car company does not produce many different models. The high design cost and mold cost are the most important reasons.

Later, with the continuous advancement of three-dimensional computer design software, car models can be modeled directly in the computer, and then automatically programmed to automatically perform various force analysis, stiffness analysis, torsion analysis, and collision analysis.

Afterwards, it is directly divided into various components in the computer, and then the data required for the mold can be quickly established, and the mold processing program can even be written automatically.

Some extreme car manufacturers have even abandoned the manufacturing of clay models and have done everything on computers.

This makes complex body shapes possible, and tooling and design costs are directly reduced by an order of magnitude.

The shapes seen on the streets in later generations may be novel, gorgeous, or weird, all thanks to the advancement of computers.

Liu Da said in "The Three-Body Problem": "Destroying you has nothing to do with you."

It is not the car factories that are subverting the entire automobile industry. During this process, many companies that were slow to embrace computer-aided design and manufacturing died inexplicably.

Readers of later generations will definitely find this process somewhat familiar. Yes, this subversion process has been carried out again in the electric vehicle market. Perhaps we will witness the decline of some car companies that failed to transform in time.

Wang Fei held Wang Xu's hand, and Wang Xu pretended to follow behind.

Wang Fei's hand was warm and soft. Wang Xu, who was blindfolded, focused all his attention on his hand, but he felt more and more comfortable.

After going down three floors and walking out of the back door of the small building, Wang Xu could hear various admirations and various restraining sounds from the surrounding crowd.

Obviously, the place was already crowded with people watching the fun, and everyone in the small building probably ran out.

"Whoa, woo, boo!"

The sound was chaotic and noisy, but when Wang Xu walked out of the small building, it slowly became quiet.

Wang Fei's footsteps were cheerful, but she always paid attention to the feet of Wang Xu, who was holding her hand. She walked carefully, for fear of accidentally falling to him.

Wang Xu's steps were steady. He could have walked faster, but he was afraid of spoiling Wang Fei's mood.

Soon, Wang Xu knew that he had reached the center of the small square. Wang Fei stood still, but did not take off Wang Xu's blindfold immediately. Instead, she hugged him gently and gave him a long hug. hug.

Wang Xu also hugged the girl gently, letting the red cloth continue to cover his eyes, and felt the girl's sincerity with his heart.

For a long time, maybe not long after, Wang Fei let go of Wang Xu with some reluctance, kissed Wang Xu's exposed chin gently, rubbed Wang Xu's chest, and then reached out to help Wang Xu untie the veil. The red cloth covering his eyes allowed the spring sunshine to shine into Wang Xu's eyes.

Wang Xu took a moment to adjust and saw a beautiful piece of art parked quietly in the center of the small square.

The orange body, exaggerated headlights, graceful light lines, and flat front of the car, every detail shows Wang Xu the taste of this work of art.

Porsche, Wang Xu recognized this somewhat low-key sports car brand almost at a glance.

He said he didn't want to guess, but knowing that Wang Fei was going to give him a car, how could he hold back from guessing.

He had guessed that Wang Fei would buy her a sports car, and he guessed that Wang Fei would definitely get used to him and buy him big toys. In China of this era, the three big toy brands were still just things in the pictures.

The red Ferrari and the yellow Lamborghini, both cars have extremely bright colors.

Therefore, whether Xiangjiang or Wanwan, these two cars are the favorites of second-generation young people who love to show off.

The relatively low-key Porsche is often the favorite of middle-aged men who are sullen. Wang Fei obviously clearly grasped the mentality of Wang Xu, an old man who is immature on the outside but sullen on the inside.

Wang Xu excitedly pulled Wang Fei around the car several times and checked repeatedly before he truly understood what the car was.

Wang Xu was really shocked. Wang Fei really gave him a huge surprise. Because this car is not a common 911 on the market at all, not even a 911 turbo. This is a 964, a limited edition 964, a 964 that is not low-key at all.

(It’s too late, so I won’t introduce it. If any book friends know it, you can post pictures)

"Oh, haha, wife, I love you." Wang Xu cheered, not sure whether he was calling for a person or a car.

——

(See you tomorrow)