Smart Industrial Empire

() "Why?" Seeing Yun Fei's trickery, although Ou Yuanshan was very dissatisfied, he could only ask Yun Fei why.

"Why? I think, this problem, I guess, the management of all machine tool factories knows. At the same time, all workers will ask, why is the machine tool market On the contrary, it’s not as popular as the 80s.”

"I'm talking about you boy, let's talk about the topic directly. How can someone like you always tantalize people! You are not busy. I, who work for you, don't have as much free time as your boss. Well, my salary is deducted, who do I go to?"

Seeing that Yun Fei was still continuing his nonsense, Ou Yuanshan's impatience was directly expressed.

This bastard Yunfei probably wants to save wages.Although his salary as a workshop director is several times higher than that of the previous workshop directors, his workload is also several times that of the previous workshop directors in the 9327 factory.

Jiuyi Heavy Industry, as long as it is related to heating, is divided into the melting workshop.Take the current smelting workshop as an example, it is the merger of the original woodworking workshop, foundry workshop, and heat treatment workshop.

In fact, the workshop has not changed, and the work content has not changed.It's just changing the original three sets of management teams into the current one.The smelting workshop is now the largest workshop in Jiuyi Heavy Industry, with nearly [-] people!

Damn capitalist!

Facing Ou Yuanshan's impatience, Yun Fei hastily patted himself on the head.I don't know what's wrong during this period of time. Everything I say is full of nonsense, as if I can't talk about the topic without talking enough nonsense.

It's all idle!Yun Fei despised himself in his heart.

"The reason why many machine tool companies cannot sell the machine tools is not because of other reasons, but mainly because of quality problems!" Yun Fei pointed out the direct cause of the downturn in the domestic machine tool market.

Since the beginning of the 80s, China's economy has recovered rapidly, and the country is waiting to be rebuilt, especially the most basic machinery industry, which is related to almost all industries.Stimulated by market demand, major machine tool factories are expanding rapidly. The most demanding lathes, milling machines and even planers are in short supply in China.Many foreign machine tool factories have exported these ordinary machine tools to China.

Among them, Japan is the worst. A 360 lathe with a maximum processing diameter of 1000mm and a workpiece length of 636mm can be sold at a high price of 80 to [-] in China!From this we can see the demand for these machine tools in the Chinese market in the [-]s.

Driven by the huge profits brought by the huge market demand, the domestic machine tool manufacturers have gradually relaxed their control over quality in pursuit of quantity, so that the equipment sold cannot be compared with the ones produced before.

Since the main force of purchasing these machine tools is the private market, and many of them are private factories, they do not have the same work and rest time as state-owned enterprises.These machine tools are running at full capacity 24 hours a day. The lathes purchased by many people have been used for less than a year, and the processing accuracy has dropped a lot.Especially those factories that make forged workpieces and intermittent cutting parts, those equipments, even in less than half a year, the newly purchased lathes and milling machines can only be used for rough machining of blanks.

The main reason for this situation is that the aging treatment of the machine tools they produce is not good.

The domestic factories used to produce machine tools, they all learned from the big brother of the Soviet Union, and they all used natural aging.This natural aging is generally calculated in years. Under the stimulation of domestic market demand, how can they give up a year's profit?Machine tools from many factories are even bought on the market after only two or three months of natural aging.

As a result, the aging treatment did not meet the design requirements, and the internal structure of the bed of the machine tool was not very stable.In the case of external force, the bed of the machine tool does not disappear because of the internal stress, and new stress is generated, and the bed of the machine tool will gradually deform.

The most obvious manifestation is the bending deformation of the machine tool track.

Anyone who works in machinery knows that the machining accuracy of a machine tool depends largely on the accuracy of the guide rail.After the guide rail is bent, the motion trajectory that was originally a straight line during the processing process will become a wavy line. Although it is very subtle, it is particularly obvious in the mechanical processing counted by 0.01mm.Because the running track of the tool or the workpiece determines the shape of the processed part.

Those old-fashioned machine tools from the 60s to the early 80s will not have this problem.Because the natural aging time is long enough, and in the process of use, if the machine tool is deformed, those state-owned factories that mainly own will have special fitters to repair the guide rails, so that the curved rails become a straight line again.

The quality has declined, and the interests of those private owners who are pursuing interests have been hurt. Even if they have such a demand, they will no longer consider buying a machine tool production plant that has allowed them to be fooled once.Even if the price drops, they won't buy it.Therefore, many people would rather spend a high price to buy a good machine tool than spend a low price to buy more garbage equipment.

Leaving behind Ou Yuanshan with a pensive face, Yun Fei walked towards the machining workshop.

"Scrap, no matter what reason you have, this spindle must be scrapped!" Yun Fei had just walked to the door of the inspection room of the Jing processing workshop when he heard Cheng Feng's distraught voice.

"Manager Cheng, this is just a slight deviation (0.01mm, we will directly use mechanical terminology in the future), and it will not affect the use..." A worker in his 30s said good things to Cheng Feng, looking forward to Cheng Feng Show mercy.

"You are a master craftsman, and you don't have to do this for a year or two? The tolerance given on the drawing is only minus seven μ (0.007mm). You can make it now, and it can be used directly to minus nine. Do you think it can still be used? It doesn't affect it. Use? Are you a turner or an assembler?" Cheng Feng almost roared.

"What's the matter? We used to be out of tolerance by three to five wires, so we didn't use it as usual? At most, it will take a while to make a new one..." The worker was still there to defend.

In the process of operation, it is inevitable that there will be some mistakes. In the past, in the 9327 factory, as long as the tolerance is not too large, and the position of use is not very critical. In addition, the relationship between the inspection and the workers is in place. At most, after a word of attention, it will pass, even if the parts are used. Life is not long, when the time comes, just make another one and replace it.

"Scrap, I don't want to hear your explanation. This is a scrap form. You fill it out yourself!" Cheng Feng ignored the worker, put down the micrometer in his hand, took out a stack of scrap slips from his work clothes pocket, and tore them up. The next one was handed to the worker.

"This spindle, I think you are qualified. You want me to fill in the scrap form, but there is no way! Don't you just want to deduct our bonus? I will see how you deduct it today!" The worker's face became pale. Tie Qing grabbed the scrap sheet in Cheng Feng's hand, crumpled it into a ball, threw it on the ground, then stomped on it, and looked at the person transferred from Huadu with a teasing expression. A young manager.

Cheng Feng's face instantly turned into a pig liver color.

Seeing this, Yun Fei knew that something would happen if he didn't go up.

At the beginning, Yun Fei heard that it was said to be out of tolerance by a little bit, and felt that it would be no problem to let it go, as long as it was not used on a key position, but later he heard that the tolerance range was only [-] μ, and he knew that this must be the key The key parts, otherwise the requirements would not be so high.This must be used to install the bearings.Whether the precision of a machine tool is high or not, the spindle is also critical.

However, Yunfei is not very curious. The parts with a tolerance of 7μ should be ground by a grinder. Although a skilled lathe can also be machined, the surface roughness cannot achieve the effect of a grinder at all.

Originally, he planned to see how Cheng Feng, the manager of the quality department, who he hadn't had much contact with for almost a year, would do with this matter, but seeing the worker's performance, he hurried forward.He was worried that this uncle-like worker would beat Cheng Feng.

Cheng Feng is a new outsider. Most of these workers in the factory have worked together for more than ten or twenty years. If there are workers who really come out to shout, someone will definitely come forward and gang up on Cheng Feng, who represents the work. Manager of quality department with worker against inspection.

In the machining industry, the contradiction between inspection and workers far exceeds the contradiction between workers and managers.

During the production process, workers will inevitably make some mistakes, especially in the processing of parts that require high precision. If they are not careful, there will be out-of-tolerance.However, for general lathe processing, the minimum processing error will be more than one thread two. The error of general lathe processing, for parts with high precision requirements, the tolerance is generally one thread two, one thread eight, two threads one, two threads five. tolerance.

It is mainly the position of the bearing on the shaft and the position of the bearing in the hole.If it is not that the grinding machine is not easy to process, or the parts assembled with it have special requirements for cooperation, the grinding machine will be used.Of course, the production of small batches of single pieces will also be processed by lathes.

"What's going on?" Yun Fei asked.

"For this main shaft, two of the three bearing positions are out of tolerance, one out of tolerance by one thread, and one out of tolerance by half a thread..." Seeing Yunfei, a young boss, a petite female inspector in her 30s pointed at her. Yunfei introducing the situation?

"How could the grinder be so different?" Yun Fei knew what was going on, but he still pretended to be confused.

He is quite familiar with the processing technology of the lathe spindle.Just the final grinding machine process is divided into three processes: coarse grinding, semi-fine grinding, and fine grinding.

"It's not made by a grinder, it's made by a lathe." The lathe worker said to Yun Fei suddenly.

"Who arranged it?" Yun Fei became angry immediately!

Many experienced masters of state-owned enterprises will not process according to the technological process.As long as there is no problem, no one will be held accountable.Yun Fei understands this problem better than anyone else, but he doesn't want such problems to appear in his factory. (To be continued.)