"Why?" Seeing Yunfei''s betrayal, although Qu Yuanshan is very dissatisfied, he can only ask Yunfei why according to his meaning.

    "Why? I think the management of all machine tool factories knows this problem. At the same time, all workers will ask, clearly, a large number of factories have been established in the whole country, and the market demand is also growing. Why is the machine tool market not as hot as it was in the 1980s? "

    "I say you, boy, just talk about the subject. There is no one like you who is always tempting! You''re not busy. I don''t have as much free time as your boss. Otherwise, you''ll deduct my salary because I don''t do a good job. Who am I looking for? "

    Seeing that Yunfei was still continuing his nonsense, Qu Yuanshan''s impatience was directly manifested.

    Yunfei, an asshole, probably wants to save wages. Although his salary of the workshop director is several times higher than that of the previous workshop directors, his workload is also several times that of the workshop directors of the previous 9327 factory.

    Jiuyi heavy industry, as long as it is related to heating, is divided into smelting workshops. Take the current smelting workshop for example. It is the merger of the original woodworking workshop, sanding workshop and heat treatment workshop.

    In fact, the workshop has not changed and the work content has not changed. It''s just to change the original three sets of management team into the present one. The smelting workshop is now the largest workshop of the whole Jiuyi heavy industry, with nearly 400 personnel!

    Evil capitalist!

    For the impatience of Qu Yuanshan, Yun Fei hurriedly patted his head. I don''t know what happened during this time. What I said is nonsense. It seems that I can''t say the theme without enough nonsense.

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

    "The reason why the machine tools produced by many machine tool companies cannot be sold is not others, but mainly quality problems!" Yun Fei pointed out the direct cause of the depression of the domestic machine tool market.

    Since the 1980s, China''s economy has recovered rapidly, and there is a lot of waste in China, especially the most basic machinery industry, which is related to almost all industries. Stimulated by the market demand, the major machine tool production plants are expanding rapidly. The lathes, milling machines and even planers with the largest demand are in short supply in China. Many foreign machine tool factories have exported these ordinary machine tools to China.

    Among them, Japan is the biggest. A 636 lathe with a maximum processing diameter of 360mm and 1000mm long workpieces can sell at a high price of 60000 or 70000 in China! From this, we can see the demand for these machine tools in the Chinese market in the 1980s.

    Driven by the huge profits brought by the huge market demand, the domestic machine tool manufacturers pursue quantity and gradually relax the quality control, so that the equipment sold can not be compared with the previous production.

    As the main force for purchasing these machine tools is the private market, many of them are private factories, and they don''t have the same work and rest time as state-owned enterprises. These machine tools operate at full load 24 hours a day. The machining accuracy of lathes purchased by many people decreases a lot in less than a year. Especially those factories that make forged workpieces and intermittent cutting parts, those equipment, or even less than half a year, the newly purchased lathe milling machine can only be used for rough machining of blanks.

    The main reason for this situation is that their machine tools are not handled well.

    Domestic factories, which used to produce machine tools, learned from the big brother of the Soviet Union and used natural aging. This natural prescription can generally be calculated over a year. Under the stimulation of domestic market demand, where can they give up a year''s profit? Many factory machine tools are even bought on the market after only two or three months of natural aging.

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

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

    As we all know, the machining accuracy of the machine tool largely depends on the accuracy of the guide rail. After the guide rail is bent, the motion track that was originally a straight line in the processing process will become a wavy line. Although it is very subtle, it is particularly obvious in the machining counted by 0.01mm. Because the running path of the tool or workpiece determines the shape of the machined part.

    This problem would not have occurred in those old machine tools from the 1960s to the early 1980s. Because the natural aging time is long enough, and if the machine tool is deformed in the process of use, those state-owned factories will have special fitters to repair the guide rail, so that the curved track becomes a straight line again.

    The decline in quality has hurt the interests of private bosses who pursue interests. Even if they have such demand again, they will no longer consider buying the machine tool production factory that they once worked as. Even if the price drops, they won''t buy it. Therefore, many people are willing to spend high prices to buy good machine tools, rather than spend low prices to buy more waste equipment.

    Leaving a contemplative face of Qu Yuanshan, Yun Fei walked towards the machining workshop.

    "Scrapping, no matter what reason you have, this spindle must be scrapped!" Yunfei just walked to the door of the inspection room of the finishing workshop and heard Cheng Feng''s angry voice.

    "Manager Cheng, this is not too bad (0.01mm, which will directly use the professional terminology of machinery in the future), and it will not affect the use..." a worker in his thirties said good words to Cheng Feng and expected Cheng Feng to show mercy.

    "You''re all teachers. It''s not a year or two to do this, is it? The tolerance given on the drawing is only minus seven μ（ 0.007mm), you can make it directly to minus one nine. Do you think it can still be used? Does not affect use? Are you a turner or an assembler? " Cheng Feng roared.

    "What''s the matter? We used to be so bad that we didn''t use it as usual? At most, it will take some time to make another one... "The worker was still defending.

    In the process of operation, it is inevitable to make mistakes. In the past, in 9327 factory, as long as the out of tolerance is not very large and the use position is not very critical, in addition, the inspection and worker relations are in place. After a word of attention, it will pass. Even if the service life of the parts is not long, just make another one and replace it at that time.

    "Scrap, I don''t want to hear you explain this. This is the scrap form. Fill it out yourself!" Cheng Feng ignored the worker, put down his micrometer, took out a stack of scrap sheets from his overalls pocket, tore off one and handed it to the worker.

    "This spindle, I think you are qualified. There is no way for me to fill in the waste form! Don''t you just want to deduct our bonus? I''ll see how you buckle it today! " The worker''s face turned blue. He grabbed the scrap sheet in Feng''s hand, crumpled it in his hand, threw it on the ground, stepped on it with his feet, and looked at the young manager transferred from Huadu with a playful face.

    Cheng Feng''s face turned pig liver in an instant.

    Yunfei sees here and knows that if he doesn''t go up again, something will happen.

    At the beginning, Yunfei heard that it was a little too bad. He felt there was no problem putting it in the past, as long as it was not used in key positions, but later he heard that it was only seven μ We know that this must be the key part of the key, otherwise the requirements will not be so high. This must be used to install bearings. The accuracy of a machine tool is not high, and the spindle is also key.

    However, Yunfei is seldom curious, 7 μ The tolerance parts should be grinded out by the grinder. Although skilled lathe workers can turn them out, the surface roughness can not achieve the effect of the grinder at all.

    Originally, I planned to see how Cheng Feng, the manager of the quality department who had not had much contact for nearly a year, handled this matter, but seeing the performance of the worker, I hurried forward. He was worried that Cheng Feng would be beaten by the old man''s workers.

    Cheng Feng is a new outsider. Most of these workers in the factory have worked together for more than ten or twenty years. If workers come out and shout, someone will definitely come forward and fight Cheng Feng, the manager of the quality department who represents the inspection against the working workers.

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

    In the production process, workers will inevitably make some mistakes, especially in the processing of parts with high precision requirements. If they pay little attention, there will be out of tolerance. However, for general lathe machining, the minimum machining error will be more than one thread two. For general lathe machining errors and parts with high accuracy requirements, the tolerances are generally one thread two, one thread eight, two thread one and two thread five.

    It mainly refers to the bearing position on the shaft and the bearing position in the hole. If the grinding machine is not difficult to process, or the parts assembled with it have special requirements for matching, the grinding machine will be used. Of course, single piece small batch production will also be processed by lathe.

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

    "This spindle, three bearing positions, two out of tolerance, one out of tolerance, one out of tolerance and half of tolerance..." seeing Yunfei, the young boss, a petite woman in her thirties, introduced the situation to Yunfei?

    "Why is the grinder so bad?" Yun Fei knows what''s going on, but he still pretends to be confused.

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

    "It''s not made by a grinder, it''s made by a lathe." The mechanic suddenly said to Yunfei just now.

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

    Many experienced state-owned enterprise teachers will not process according to the process flow. As long as there is no problem, no one will be held accountable. Yunfei understands this problem better than anyone, but he doesn''t want such problems in his factory.