Rebirth 1990: I have three golden fingers.

Chapter 140 Qin Shuyu learned bad things
Computer painting AutoCAD has been around since 1982. By 1991, it was already in its 11th version and could not be operated under the WINDOWS operating environment.

If you want to use the WINDOWS operating environment, the earliest version was released in August 1992, AutoCADR8.

It took 95 to truly adapt to Pentium models and the Windows1997/NT operating environment.

Even if Fang Bai knew how to use CAD, he would have to wait until the end of next year at the earliest.

But for now, he can only draw on white paper with a pencil.

He asked Wang Dakai to help buy dozens of one-size-fits-all sketch paper, and then spread the sketch paper on a large table for drawing. If he made a mistake, he could only erase it with an eraser, which was not as convenient as CAD.

Before drawing, Fangbai dissected the structure of the DN150/PN100 gate valve: valve body, valve plate, valve cover, valve stem...

Formulate important design parameters: nominal inner diameter DN150, nominal pressure PN100, material WCB...

Based on the rough structure, I made a design BOM list, listing the drawing number, quantity, materials, etc. of each component. It was actually a list of components.

Before large-scale design division of labor, there will be a design BOM list, and the overall design leader will assign tasks to each designer, who is responsible for designing which part.

Fang Bai has no subordinates, but it is useful for him to design the BOM list to avoid confusion due to too many parts.

A BOM alone is not enough. The person in charge of design must clearly explain the important parameters of each component.

For example, valve body: wall thickness, calculated pressure, calculated inner diameter, allowable tensile stress, corrosion allowance, minimum wall thickness, etc.

Fang Baiguang spent half a day sorting out the calculations for these tasks and components.

Fortunately, the structure of a gate valve is not complicated. The main components are the valve body and the valve plate. The rest are some standard parts, such as bolt standard parts. This does not need to be designed. Just choose the thick and long bolts, the quantity and grade. That's it.

"Hey, it seems simple, but it is still very troublesome to draw."

Fang Bai began to design the valve body structure. He was familiar with the drawings, but he still forgot some of the dimensions. Fortunately, it had little impact and he made modifications.

Before you finish drawing a drawing, you cannot use cheats to analyze it.

In other words, if you want Goldfinger to help him analyze it, you also need to let the plug-in know what you are drawing.

Fang Bai was drawing pictures at home, and Qin Shuyu came to accompany him during the day.

One draws a picture and the other looks at the CPA information.

When both of them are tired, they close the bedroom door and relax in the room.

Fang Bai is not Liu Xiahui, but it is really inconvenient at home, so he can only try it briefly and wait until Shencheng.

After a few days, Qin Shuyu also learned bad things. She hugged Fang Bai's neck and said in his ear, "Fang Bai, there is something dirty on my clothes."

Fang Bai sometimes happened to be immersed in mechanical drawing, but he had to satisfy Qin Shuyu's demands.

A few days later, Fang Bai finally completed the first draft of the DN150/PN100 gate valve drawing.

Then use the middle finger golden finger to analyze and design, and the whole picture is covered with red!

Fang Bai was not in a hurry to revise, but analyzed the errors one by one, figured out the problem, and wrote it down. This was the best opportunity for learning and summary.

He lacks design experience, and Goldfinger is the best instructor.

It can be said that after he finished drawing this set of pictures, it took others several months to learn.

Thinking of this, he simply picked up the blank paper and drew the picture again.

Three more days later, he was not satisfied until there were no more red dots on the new drawing.

It can be said that the newly designed drawings not only solve design problems, but also solve some process manufacturing problems, making manufacturing easier and lower manufacturing costs.

Even if the valves of the same model are sold at the same price, the products designed by Fangbai have greater profit margins.

I have to say that the golden finger assists in drawing, even without CAD, the drawing efficiency is very fast, and only needs to be modified once or twice.

Without the help of golden fingers, under normal circumstances, the products designed by Fang Bai will undergo analysis and discussion by the design department after the new product is designed, and trial production will not begin until a final decision is made.Problems will be discovered during the trial production process, and then the drawings will be modified and trial production will be restarted.

After the trial production is successful, it does not mean that the designed product is qualified. Various tests must be started for verification.

If major problems are found during the test, the drawings will be modified and trial production will be started again.

Only after the trial production and testing were successful, small batch production was started to verify the process.

If there are no major problems with the process, mass production can begin.

It may only take a few days to draw this set of valves, but subsequent analysis, trial production and verification will take a lot of time, say at least two to three months, or even as long as one or two years.

Moreover, during customer use, problems will be discovered and then continuously optimized.

After a new product is launched, it will take many years of repeated verification and optimization before it can be considered mature.

Therefore, Fang Bai's golden finger helped him save a lot of time and avoid many detours.

For this reason, Fang Bai felt that his golden finger was very abnormal and greatly shortened the development cycle.

If it was still LV3, Fang Bai would still need to create a physical object before he could analyze it, which would waste a lot of time.

After Fang Bai designed the drawing, he went to the mall to make a copy of the drawing and gave it to his father-in-law, asking him to make the mold for the valve body casting.

The valve body is made of WCB material casting, so it needs to be cast, and the manufacturing cost is not low.

The valve body structure is complex, the processing cost is too high, and the processing is very difficult. Casting is generally used, and the manufacturing cost is low.

However, the material density of castings is definitely not as good as that of forgings, and castings have many problems, such as common sand inclusions, pores, and riser problems.

This casting process has been like this for decades, and even after 30 or [-] years, there has been no qualitative change.

Fangbai has already noticed this problem when designing the valve body, and mainly solves it structurally, so that the metal liquid can flow into various parts smoothly during the casting process.

At the same time, Fang Bai prepared the information for patent application.

After preparing the appearance patent, utility model patent and invention patent information, apply together. Although Fang Bai has never dealt with patent matters, he still knows something about it.

Fang Bai has been busy, and the time soon came to August 8, which was the day of his college entrance banquet.

His parents arranged the entrance banquet to be held in a hotel in Yongjia County, inviting not only relatives and friends, but also teachers from Oubei No. [-] Middle School. Fang Bai took this opportunity to also invite county leaders and some business partners.

In the past few days, all the invited guests were worried about the etiquette.

Give money as a gift, people will not be short of it.

This is a bit troublesome. If someone is short of money, it can be easily solved by giving a red envelope, but I happened to meet a family who is not short of money.

Last night, when the family was chatting in the living room, Liu Fengqing said that this college entrance banquet must make people look happy. She was curious about how many people's faces were when they gave them many gifts and then sent them back in double portions.

"Mom, you are a bit naughty!" Even Fang Tingting felt that her mother was a bit hurt.

Fang Bai was too lazy to say anything. His mother couldn't change her temper, and no one could stop her from playing the piano.

Liu Fengqing smiled and said: "I didn't learn it from your brother, but he is full of bad ideas."

Fang Bai no longer had any objections. Instead of speaking, he took the blame and retorted: "Mom, I don't want to take the blame! This bad idea was just your idea. I think some of the bad qualities in me are inherited from my parents."

"Brother, just memorize it. It's not bad this time anyway, hahaha." Fang Tingting sat cross-legged on the sofa, smiling happily.

"Haha, okay, I'm also curious about how these relatives will react after seeing the double red envelopes." Fang Bai didn't bother to refute.

Fang Shi watched TV and said nothing. He was afraid that dirty water would be thrown at him.

(End of this chapter)