Siheyuan starts from a better life

Chapter 419, Machine Tool Transformation 2
"Look, here and here, the design is bolder. With these parts, their accuracy will be much better. You must remember the characteristics of Mao Xiongguo's machine tools. This machine tool is durable, so be bold."

In the workshop, many people from the technical department were surrounded by this machine tool that was about to be scrapped. Jiang Yan directly started teaching on the spot.

According to the design drawings they gave them, they had considered it quite comprehensively. However, after Jiang Yan saw it, he felt that they were a little more conservative and felt that there was room for further improvement, so he took action directly.

After my own calculations, after the modification of this machine tool, the processing accuracy can reach the standard of ten wires. After adjusting the maximum spindle speed, it can be restored to [-] rpm.In this case, this machine tool can almost achieve some of the functions of current machine tools, and the parts processed can almost be at a higher level. It is conservatively estimated that there will be no major problems in ten years of use.

In the end, more than 30 parts of this machine tool needed to be replaced. Basically, all the gears were replaced, the motor casing was recast, the screw rod, and all parts related to the feed were redone.Although the amount of work is a bit larger, the effect is still quite obvious after production.

Under Jiang Yan's guidance, people in the technical department began to redesign the drawings, with Jiang Yan also providing guidance.

Every drawing needs to be checked by Jiang Yan to ensure it is correct. After Jiang Yan's guidance, the technicians in the technical department learned a lot from it.

Everyone’s enthusiasm has also increased a lot.It's like being suddenly beaten to death.

"In this major renovation of the machine tools in the institute, we must remember to agree to use international standards, so that the specifications of the parts produced on the machine tools can be unified in the future." Jiang Yan emphasized to the technician at the end.

After all these drawings have been drawn and distributed, the workers will start production according to the drawings.

All the drawings were calculated again, and the final calculation results were the same as Jiang Yan expected. Since the design accuracy is not too high, the performance of this equipment will be similar to that of most lathes in the institute now, and there may even be It might be better.

In addition to fixing the machine tool itself, Jiang Yan also guided the researchers to disassemble and maintain the motor, and asked the workshop to reshape it according to the motor casing.

The casing of this chassis is so old that it was sold as scrap metal and was almost useless.

Under Jiang Yan's guidance, the motor was disassembled and all the parts inside were taken out. At this time, Jiang Yan saw, my dear, there is a thick layer of grease inside. It has not been maintained for who knows how many years. Yes, it looks too ugly.

So Jiang Yan began to instruct the technicians to disassemble the motor, clean it and lubricate it. Seeing where they were busy, Jiang Yan took a look and left directly to the experimental workshop. in.

"Are all the parts ready?" After entering the workshop, Liu Haizhong, who was watching the workers working, ran to Jiang Yan when he saw it.

"Mr. Jiang, basically everything has been processed. There are only a few things that need further polishing. I have gone to other workshops to invite level [-] workers to come over and are currently polishing them."

Liu Haizhong and Jiang Yanqian replied respectfully.

"Let's go take a look." Jiang Yan said to Liu Haizhong and went directly to the worker's workbench.

Walking to the front of the workbench, Jiang Yan discovered that the thing the workers were polishing was the screw rod. Seeing this screw rod, Jiang Yan understood that among all the parts, considering the machines in the institute, the screw rod was undoubtedly the most rare thing. , and Jiang Yan’s requirements are still relatively high, especially the accuracy requirements, which are even more stringent, so the screw can only be roughed, and the other parts need to be polished bit by bit by level [-] workers. At the moment, it is the entire screw that is polished. Zheng Fugui, one of the two eighth-level workers in the institute, saw him, and Jiang Yan walked over. At this time, he was trimming the screw rod with a small file. These are the most demanding skills, first using a file, then coarse sandpaper, Fine sandpaper and metallographic sandpaper. Since the precision is not abnormal, it is almost enough to use up the metallographic sandpaper. Looking at the unfinished work, it is estimated that just the fine repair of the screw rod will take a day, and even if it is not correct, it will be fine.

If you can't come out, this will quite test a person's patience.
The polished screw is the first step. Next, it needs to be heat treated. After the heat treatment, it needs to be finely trimmed, and then surface treated as needed.Only in this way can it be used.

Heat treatment is to release the internal stress of steel. During the steel production process, hot rolling, cold working, welding and other process operations will subject the surface and interior of the steel to varying degrees of stress, resulting in the generation of internal stress.In addition, factors such as temperature, residual stress, deformation, and oxidation will also affect the internal stress of steel.

If these stresses are not eliminated, the screw may deform during use. After all, this is used on machine tools. If not handled properly, it will affect the accuracy of the machine tool, and there will be a lot of trouble later.

The surface treatment is carried out in different ways according to the parts used, such as gears. The quality of the steel is still poor now, so Li Zhao plans to carry out nitriding treatment to enhance the wear resistance of the surface.Since the others are mainly used in the exposed air and the stress is not as great as gears, Li Zhao is going to blacken them to prevent rust. It will take at least three or four days to complete all these processes. I have no choice but to wait for the time.

Immediately afterwards, Jiang Yan walked to the other parts being processed and took a look. He found that everyone was busy and left.

After that, they came to the parts that had been produced. They immediately picked up one and took out the ruler that they carried with them to measure. They measured several parts in a row. Almost all the parts they produced met the requirements.

"Old Liu, not bad, not bad." Jiang Yan praised Liu Haizhong.

Hearing Jiang Yan's compliment, the bangs in his face turned red.

Liu Haizhong, who came back to his senses after a while, saw Jiang Yan who was about to walk out of the workshop as if he remembered something and hurriedly caught up with him.

"Mr. Jiang, wait, Mr. Jiang, wait." Hearing Liu Haizhong calling him, Jiang Yan stopped and looked at him with a puzzled look.

"Old Liu, what's the matter?"

"Jiang is always like this. Didn't you arrange for me to produce some parts a few days ago? These parts have already been produced. You can see when I will get them back to you."

Hearing Liu Haizhong say this, Jiang Yan thought about it for a while before he wanted to come, and couldn't help but pat his head with his hand.

I had previously asked Liu Haizhong to make some accessories for me to modify my bicycle. There were so many things going on these days that I had long forgotten about this matter.

After wanting to come, Jiang Yan was a little embarrassed and said to Liu Haizhong: "I'm sorry! Old Liu, you know that there are a lot of things going on these days. If you don't remind me, I will really forget."

Jiang Yan thought for a while and then said to Liu Haizhong: "In this case, I will ask my secretary to find you later and go through the formalities with you. When you get off work in the evening, you can go back with me with your things."

(End of this chapter)