Siheyuan: Starting from a fitter

Chapter 77: Difficulties encountered in manufacturing control components

When he went to work the next day, Li Guocheng threw the materials of Yan Jiefang and Zhang Meihua to Wu Liankui very roguely.

"Director, you are tired, please help me."

Wu Liankui picked up the information helplessly and cursed with a smile: "I really owe you. Am I the director, or are you the director?"

"Can you please do more work? Let's see if it's okay for you to have a good meal." Li Guocheng took the opportunity to treat him to a guest and bond with him.

"Then it's agreed that we don't have time this weekend. We will just get together next Sunday. You have a partner, right? We will bring them out to get to know each other then." Wu Liankui also had this intention.

"As much as possible, my partner often travels on business and the time is difficult to determine. I will give you news next Saturday." Li Guocheng was also helpless. Since he had chosen, he could only understand and support.

"Okay, we'll confirm next week."

"By the way, the drawings for my semi-automatic lathe have been completed, and Zhou Xiaojuan is responsible for the follow-up work, which is just a good opportunity to exercise her work coordination ability. Now Gong Wang is completely obsessed with the thermal stress relief process, and Master Yi is focusing on the motor unit again. Experienced manpower is still "Insufficient", Li Guocheng stated the purpose of training Zhou Xiaojuan.

"Aren't you afraid that the little girl will be angry at the rough men in the workshop?" Wu Liankui asked narrowly.

"If you want to do something, you have to face these things and adapt slowly." Li Guocheng thinks it doesn't matter. This is something that must be faced when growing up.

"Those guys are not bad, they just like to play tricks on newcomers, but there are also some bad things that you have to guard against in advance." Wu Liankui still felt that it was a little difficult for a young girl to face the rough men in the workshop, so she needed to be protected.

"Don't worry, don't give face to the laboratory. Let's see how I deal with them." Li Guocheng came from the workshop. He has seen many dirty things and knows how to deal with them.

After Li Guocheng said hello, he came to Zhou Xiaojuan's workstation.

"Xiao Zhou, after the drawings are reviewed and approved, the technical department will break down the tasks, and then the factory office will assign them to relevant workshops. You will cooperate with the workshops for the production of all parts, including technical support, tracking progress, tracking inspections and checking data. You have Don’t have the confidence to win?”

After Zhou Xiaojuan heard this, she was excited and worried at the same time. After all, either Gong Wang or Master Yi was responsible for all the previous work. It was the first time in her life for a big girl to get into a sedan chair.Thinking of "getting on the sedan chair", his face suddenly turned red and he glanced at Li Guocheng secretly.

"Director, if you think I can do it, I will do it," Zhou Xiaojuan promised.

"In that business, learn more from Master Wang and Master Yi. If you encounter any problems that you can't solve by yourself, remember to come to me."

When Zhou Xiaojuan heard this, she became distracted again.Seeing that she didn't respond, Li Guocheng pushed her and said, "Hey, wake up."

"Hey, I understand." Zhou Xiaojuan blushed and responded immediately.

Li Guocheng looked at Zhou Xiaojuan's current performance and felt helpless. He would not listen to her no matter what, and always felt that she was lying to him.

Li Guocheng came to the processing workshop of the laboratory, picked up the unfinished parts yesterday and walked to the only Dawn 1966 machine tool. He started processing the core components of the semi-automatic machine tool, namely the setting dial of the depth of cut and the automatic parking module. Without a microprocessor, all of this work would have to be done mechanically.

In the previous stage, the only Shuguang 1966 machine tool was moved to the laboratory processing workshop for precision machining and experiments.

The dial is designed to imitate the principle of a spiral micrometer. It consists of three layers of dials. From low to high, they are large dial, middle dial and small dial. The smallest scale of the large dial is 10mm, the smallest scale of the middle dial is 0.1mm, and the small dial is the smallest. The scale is 0.005mm. The theory of overall cooperation can reach 0.005mm, but in practice it should be able to reach 0.01mm. This is already the highest accuracy of domestic machine tools.

The interior imitates the principle of a watch hairspring, coupled with a precision gear set, it is like a timer. After setting the walking distance, it slowly reduces the set value. After returning to zero, it triggers the parking module and disengages the lead screw to achieve the purpose of parking.

A manual switch is set on the walking hanging box, and longitudinal driving and horizontal driving can be selected.The shifting is done by the gear set inside the box, just like the gear lever of a car, because the shifting is done at a standstill, so no clutch is needed.

The steel materials being processed now are all experimental products for Wang Gong to complete high-temperature stress relief, and Li Guocheng happened to snatch them up and finish processing these parts.Thinking back to the time when the Shuguang 1966 machine tool was renovated, most of the time was spent waiting for the stress to be released. I still feel better now.

The mechanical processing that Li Guocheng is responsible for can be completed in half a month at most. The next key is the selection of hairspring. Due to material limitations, there are only drawings at present.Aunt Liu helped me find the relevant departments, but basically none met the requirements. Instead of waiting, it was better to find a way to experiment on my own. Don't forget that this is a steel rolling mill with special steel production capabilities.

By searching the information, the technical requirements of the hairspring are:

1. Have given elastic properties;
2. Less elastic hysteresis;
3. Small temperature coefficient (thermoelastic coefficient);

4. Good antimagnetic performance and corrosion resistance;

5. The pitches are equal;
6. The center of gravity of the wire should be as consistent as possible with the geometric center.

The realization of most of the above performance is related to materials, and processing is the simplest for Li Guocheng.It is known from the data that the hairspring is made of metal filaments that are cold-rolled, wound, and shaped. The Archimedean spiral coil spring is an elastic element that can generate reaction torque.

This task can be left to Master Yi, who needs to consider how to achieve the synchronization relationship between the hairspring and the lead screw.

Two days later, I found Master Yi to communicate the feasibility of a professional hairspring.

"Xiao Li, we have found the engineer who is best at material research in the technical department to help with design and experiments. The first five items are easy to implement, but the last item cannot be realized without professional tools. The design of 'the center of gravity of the wire should be as consistent as possible with the geometric center'" "Request", Master Yi has been obviously looking very haggard these days.

After thinking about his original design, the synchronization has not been completely solved yet, and now the hairspring is more difficult to get, so there is no need to continue the original design. After finalizing the idea, Li Guocheng said: "Master, if you can meet the first five requirements, it will be very good." That’s great. Please help me produce 5 samples according to the drawings. I’ll modify the design. The existing hairspring should be enough.”

Hearing that the request could be met, the uncle was visibly relieved.

Li Guocheng sketched on the drawings, but finally gave up the synchronous linkage and added a set of gears to drive the hairspring to rotate. The hairspring only completes the work of length measurement and removes the previous active function.

After thinking about it, I started to modify the drawings, and finally completed it before leaving get off work. At this point, all the manufacturing problems of the semi-automatic lathe were solved, and the next step was to wait for the processing of other parts.

At that time, Li Guocheng will complete the finishing by himself. With the first high-precision machine tool, the subsequent mass production of machine tools will be like a chicken laying an egg. As long as the funds are sufficient, the country's basic processing capacity will soon be completed. Overall improvement.This is the power of industrial mother machines, which are completely positive incentives.

Thinking about future generations, due to technology being blocked, Big Brother has evil intentions, and talents have not grown up, domestic machine tools have lost their ability to innovate. They only focus on quantity but not on scientific research. The quality of production machine tools has declined instead of rising, and the maintenance cost of machine tools has increased. , the defective rate of products produced using such machine tools has increased sharply, resulting in a huge waste of resources.

After the reform, various manufacturing companies were resistant to domestic machine tools and applied to purchase foreign products.Even foreign machine tools that have been eliminated are much more advanced than domestic ones, and they are at least two generations behind technology.Foreign machine tool manufacturers saw this as a good thing and dumped a large number of them, which further reduced the room for improvement of domestic machine tools. It was not until the new century that there was any improvement.

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(End of this chapter)