034 It is difficult to get a carpenter to understand Mechanical Drawing

Things started to get easier.

I don't know how good Liu Baye was at the beginning, Zhang Changgui in front of him didn't have any problems.

"We're going tomorrow for more than 20 sets, it takes a lot of time, especially since you don't have a lot ......of tools," Zhang Changgui couldn't care about being tired and sleepy when he returned to his rented house, and his face was eager.

The house Zhang Changgui rented was a dilapidated farmhouse yard.

In the Hongya Cave, which is very famous in the mountain city in later generations, it is close to the Liberation Monument, and there are still many stilted buildings.

6 yuan a month for rent.

It doesn't seem like much, but it's very expensive.

There are only three thatched houses that are about to collapse, and at night you can still see the sky through the holes in the roof.

The only good thing is to have a yard of forty or fifty square meters.

The yard was full of wood shavings and sawdust, and there wasn't much intact timber.

In the middle, two wooden horses are lined with a long thick plank.

In these years, carpenters only have a very small number of tools, no machinery and equipment.

When Zhang Changgui came back, he put away his saws, tools, gouges, chisels and other food guys, memorized them, and finished everything.

With excitement on his face.

"We can't leave tomorrow, we need to wait here for a few days, wait for the ship to ......come," Liu Chunlai organized the language.

He knew that Zhang Changgui was in such a hurry to see Liu Baye.

"But there's nothing to do here. Zhang Changgui was a little disappointed.

I thought I would be able to see Liu Baye soon.

"How can we have nothing to do? These furniture, we have to draw the drawings. Not only complete drawings, but also each part, are drawn to indicate the dimensions, so that it is easy to process. And some parts also need to be bought. "Liu Chunlai has already had an idea.

Each of these carpenters should not be allowed to take a few apprentices to finish a set from beginning to end and then continue to do it.

Specialization and streamlining can complete the follow-up.

With drawings, streamlined operations can be realized.

"Can this be guaranteed to be completed within a month?" Zhang Changgui was a little unconvinced.

Liu Chunlai didn't explain.

Early the next morning, Liu Chunlai personally went to the department store to buy drawings and pencils.

As long as the drawings are completed, when you go back, let the other carpenters take the apprentices and work according to the drawings.

Master carpenters can act as technicians to control quality and size.

"You two, go around and find a place, whether it's a faΓ§ade or a house facing the street, the price is right, just rent it, and it's best to buy it. Liu Chunlai called Liu Jiuwa and Liu Zhiqiang over and asked them to find a place, "In the future, when we come here, we will have a fixed foothold." ”

Although the two were apprehensive, Liu Chunlai still had to get the drawings out with Zhang Changgui, and he had no experience, so he could only grit his teeth and do it hard.

"Master, let's really just go with them? Isn't it good to stay in the city? Just set up a factory here, recruit people, and according to what he said, a set of furniture will be produced in a few days. ”

Taking advantage of Liu Chunlai to explain Liu Jiuwa and the two, Li Hongbing came to Zhang Changgui's side.

Yesterday I was tired from a day, walked so far, and came back without sleeping.

His eyes were bloodshot.

"If you don't want to go, stay. Zhang Changgui was drawing according to Liu Chunlai's request, and he didn't pay attention to his apprentice.

The carpenter's work is handiwork, but he has to draw it with a pencil, especially some structural positions, and he really doesn't know how to express them.

The apprentice is not sensible at all.

"Or, let Erqiang stay here with me?" Li Hongbing didn't give up, "He didn't want to go, they were all singles, go, Erqiang would ...... in the future"

"You don't have the idea of beating him!" Zhang Changgui raised his head and glared at Li Hongbing, with a fierce expression.

Li Hongbing was stunned and did not speak.

"Erqiang, come, follow me to draw a picture......" Zhang Changgui called Zhang Erqiang, who was looking at this side with a probe.

When Liu Chunlai came in, he happened to see this scene.

Li Hongbing looked at him with a very unfriendly attitude.

"What's wrong?"

"Nothing. Zhang Changgui didn't answer, "You tell me about this painting again." In the past, when my father taught me, he just drew the assembly diagram you said, and wrote down everything else......"

"Assembly diagram, let's use three views, such as a large wardrobe, from the front, what is it, draw it, and then mark the length, width, width of the middle cabinet, etc., ......"

Liu Chunlai took the pencil, drew a rectangle casually, and then drew a few strokes, and a brief outline of the large wardrobe came out.

"The part that can't be seen is directly represented by a dotted line, and you can see how it is ...... in other views."

"Left view, just look from the left......"

"Then top view, ...... from top down"

"In this way, all the dimensions of the form are determined. ”

Liu Chunlai pointed to the three sketchy views on the drawing, which were three different rectangles, but they represented the general department of the entire wardrobe.

Zhang Changgui can see clearly, just these three simple pictures, can indeed express the general situation of the big wardrobe.

"What should I do with the drawers in the wardrobe? What's the use of marking a number?" Zhang Changgui found that the drawers of the large wardrobe were not expressed at all.

Liu Chunlai grinned and pulled another drawing, "So, this needs a parts drawing." ”

Zhang Changgui understood what he meant.

On top of it, this is really good, as long as the drawings are clearly expressed, apprentices who have not yet been apprenticed can also do according to the drawings.

Liu Chunlai was relieved to see that he understood.

"Mechanical Drawing" seems very simple, all kinds of geometric projections, in mathematics class, starting from geometry in elementary school to trigonometric functions in junior high school, etc., are all basic.

But if you haven't studied it systematically, it's hard to understand.

It requires a strong spatial imagination, and when you see a drawing on a drawing, you will automatically think of what it looks like.

Fortunately, Zhang Changgui can understand and grasp it quickly.

"The size on this should be marked with a tolerance at the back, for example, how long can it be at most and how much is ...... shortest," Liu Chun said, and Zhang Changgui began to mark.

Seeing the size he wrote, Liu Chunlai hurriedly stopped it.

"Didn't you say the longest and the shortest?" Zhang Changgui was a little puzzled.

Zhang Erqiang was next to him, and he was even more confused, his father had no problem painting.

"For example, this large wardrobe is 1.8 meters wide and can be shorter by 1 or 2 mm, let's write 1.8 meters here, followed by parentheses, for example, ?0.02 means it can be 2 mm long, -0.02 means 2 mm shorter......"

"How many millimeters is it?" asked Zhang Erqiang confusedly.

Liu Chunlai was dumbfounded.

But the puzzled expressions on the faces of the two carpenters of the Zhang family, father and son, don't look like jokes.

"Yes, we usually use a few feet and a few inches, and we don't need to ...... rice," Zhang Changgui reminded Liu Chunlai.

This moment made Liu Chunlai understand what the problem was.

Indeed, the national standard has not yet been popularized in these years, except for the metric unit used by technicians in state-owned units, most of the folk artists who learned their crafts from the master were using the original old units.

Forcibly promote the national standard?

That's finding something to do for yourself.

"One inch is 33.3 millimeters. These 2 millimeters are about ......," Liu Chunlai began to convert units.

He is not accustomed to using municipal units that have been used in China for thousands of years, but it is not easy to convert.

"6 percent?" Zhang Erqiang asked Liu Chunlai uncertainly.

"Yes, it's almost 6 percent!" Liu Chunlai calculated, it seems to be about the same?

"It's too small, to make furniture, or it can't be so pre......cise," Zhang Changgui complained.

Liu Chun looked at the father and son and patted his forehead, "This is just an example, you are the master!"

"It's better to write the longest and shortest directly on it and see it clearly. In this way, it is easy to miscalculate, and the material will be wasted at that time. Zhang Erqiang reminded Liu Chunlai seriously.

Zhang Changgui also felt that this was too troublesome.

"Okay, how convenient do you think, how simple and how to come......" Liu Chunlai gave up the idea of asking them to make standard drawings.

For the masters who have not learned "Mechanical Drawing", the standardized annotation makes them feel that it is not standard.

When there is a chance in the future, find two technicians who know how to make mechanical drawings from those units that are bankrupt to specialize in this.

Seeing that Liu Chunlai was not blindly commanding, the father and son continued to draw with satisfaction.

Liu Chunlai can't help much here, he doesn't know carpentry work, thinking that Li Hongbing looked at his expression before, maybe he should talk to him?

Li Hongbing is not suitable to take away.

From yesterday's performance, I tried to persuade Zhang Changgui to do it himself several times.

Once this kind of person is brought back, it is a complete time bomb.

Perhaps, you can use him to help do something that the villagers can't do in advance.

When he came out, Li Hongbing was sitting on the stone steps outside the house, staring at the various boats passing on the river not far away, thinking about his thoughts.

"Go down here, all the way to the end, you can go to Shanghai, and then go outside, it's the Pacific Ocean......" Liu Chunlai sat next to Li Hongbing, took out a cigarette, and handed one to him.