Hearing Yunfei''s words, Ren Zhiguo nodded shyly.

    He came to Qingfeng machinery with a hard head. After all, it''s a little out of the ordinary. However, he can''t help it. This is a task that must be completed. If Qingfeng machinery really doesn''t accept these products, camart company will face a dilemma.

    Before coming, the boss said that this batch of work must be packaged with the foreign trade products in hand. Anyone who wants to make high profit foreign trade products must accept this domestic order without much profit.

    There are many processing plants that want camart''s foreign trade orders, but no one can compare with Qingfeng machinery in terms of technical strength, processing technology and production capacity. Even many processing plants have only two or three CNC machine tools in their hands. And their factory has no such master who is very familiar with NC machining, and the machining accuracy can not be guaranteed at all.

    Foreign trade parts processing, the requirements are the most stringent. Foreigners will not accept the tolerance even if it exceeds 0.001mm. Even if it exceeds such a point, it will not affect the service life of the parts. More importantly, most of the foreigners'' parts are stainless steel, which are difficult to process. Without rich processing experience, it is difficult to ensure the surface roughness required by foreigners (generally 1.6, a few less stringent requirements are 3.2). Although such surface roughness can be easily achieved by grinding machines or grinding machines, the orders in the hands of camart company, Most customers require to keep the knife marks!

    There are many parts made of ordinary steel, but the common one is aluminum. Although aluminum is easy to process, it is not enough. Due to the plastic deformation of the material, it is easy to deform the parts in the processing process, or it can not meet the requirements of surface finish.

    Foreign trade parts processing requires not only high product quality, but also higher surface quality. Many foreign factories require that the surface of processed products from the mainland should not be scratched or bumped. Otherwise, refuse to pay. Of course, it will still be used.

    In this way, the technological requirements for the processing of foreign trade products are very strong. Without rich experience in processing various materials and seeing more complex products, it is easy to lose money in foreign trade processing parts. Of course, if the products are processed in strict accordance with the drawings, foreigners can''t find any problems, and the profit is also considerable.

    The drawings Yun Fei is holding now are also parts of foreign trade products. Just changed hands by others. Processing is difficult, demanding and risky, but the profit is very low. No one would agree to such a thing. If Qingfeng machinery accepts this order, it is equivalent to their profits being taken away by the changing factory

    Camart did this because he knew that Qingfeng machinery could not refuse. Most of Qingfeng''s CNC production capacity is foreign trade parts processing, and the middleman is camart. As a middleman, camart knows a lot about Qingfeng machinery.

    Either Qingfeng machinery gives up the current development momentum and leaves millions of equipment idle to find business; Or accept the order and spend money on the development of your own factory.

    "Lao Ren, I''ve seen these pictures. There are two products we can''t do. We must have a four-axis machining center to ensure accuracy. The spatial dimension tolerance of 0.02mm on this sheet can not be guaranteed by multiple processes. A four-axis machining center must be used to ensure one-time clamping to ensure the spatial dimension tolerance, otherwise the assembly will become a problem. There is also this one. Two cross closed spiral trunks can''t be made without four-axis machining center. Moreover, the accuracy of position degree should be less than 0.05mm. In addition, the shaft with spiral groove can rotate at 30000 rpm. If dynamic balance is not done, the huge torque will make the shaft crack during high-speed operation. I really convinced you that I dare to take such a job without resources. Don''t think about it. There are several four-axis machining centers on the whole continent. " Yun Fei quickly finished reading several drawings in his hand. Yang Yang laughed at Ren Zhiguo with two drawings that can only be made with a four-axis machining center.

    Yun Fei heard Ren Zhiguo''s conversation with Wang Qingfeng just now. I felt funny in my heart. This is mostly military drawings. Looking at the precision of the parts, Yun Fei really couldn''t think of what it was used for. It was a transmission shaft with a speed of 30000 rpm. He had encountered it before, but no matter how he asked, the boss of the processing plant who had a good relationship with him didn''t tell him.

    After all, many jobs in the processing industry need to sign a confidentiality agreement before getting the order.

    On the whole, the products on these drawings, both in complexity and accuracy, are higher than what Qingfeng machinery does now.

    Since it''s not a foreigner''s job, in China, according to Yun Fei, the civilian products of this era are so precise and high. Maybe, but they are all made in domestic military factories. He has never seen what kind of high-end precision and dust-free military precision machining workshop is like.

    "Ha ha..." Ren Zhiguo can only smile bitterly at Yun Fei''s ridicule. He hasn''t read these drawings, but his boss doesn''t understand machining at all. She has to force herself to find a factory to make these complex parts first. She can only take them to Yunfei, a magical young man for help.

    After all, the products on these drawings are the most critical parts of some unspeakable equipment. It has been placed in the military factory for several years and has not been solved. After all, no one can do it without appropriate processing equipment, can''t it?

    "Can we find a way to solve it?" Ren Zhiguo has always felt that without cloud, this boy can''t solve the processing problem.

    "Can you cook without rice?" Yun Fei asked Ren Zhiguo.

    Wang Qingfeng was shocked by Ren Zhiguo''s words. Now he hasn''t recovered. He shrinks on the sofa and smokes one by one.

    He knows that camart wants half of its production capacity, and the drawings processed will not be the drawings in Yunfei''s hands. That must be a lot of products. He was weighing whether it was cost-effective to bear the loss after refusing or to give up camart''s business and open customers again.

    Ren Zhiguo was speechless.

    There was silence in the smoky office.

    Ren Zhiguo is thinking about what he will do if he can''t finish the task; The cloud is not remembering whether there is a way to make the two most difficult products without a four-axis machining center.

    But no matter what you think, you can''t think of a solution. According to the accuracy requirements of space size, repeated clamping can not guarantee the accuracy of repeated positioning, and the cumulative error will definitely exceed 0.02mm. The other closed helix with ternary equation can not ensure that the rotation of the product can perfectly match with the other three axes of the machining center.

    After all, the machining center is controlled by computer, and people can''t guarantee the precise cooperation of four directions. After all, a person has only one hand.

    The only way to solve this problem is the four-axis machining center. Four axis and three linkage are not good, but also four axis and four linkage! Thinking of this, Yunfei already had an idea in his heart.

    "Lao Ren, this job can''t be solved, but......" after smoking half a pack of cigarettes continuously, Yun Fei looked up at Wang Qingfeng and Ren Zhiguo who were looking at each other like cockfighting.

    "Come on, if you have any requirements, it''s easy to say as long as they can be solved." Ren Zhiguo knows that it is impossible to get these two parts out without paying a price. Anyway, the parts on these drawings have cost a lot after several years of experiments.

    "Add a rotary table on the machining center, that is, refit the three-axis machining center into a four-axis machining center. Not only is the price very high, but it may take a long time. " Yun Fei didn''t want to say this way. Although the rotary table looks very simple, it''s not a simple thing to cooperate with the other three axes of the machining center.

    The three-axis machining center of the control system can be used after being expanded. However, the rotation angle accuracy of the rotary table, the motion control of the hydraulic workstation for the rotary table, the angle control of the single chip microcomputer for the rotary table and so on are all difficult problems.

    If this problem can be solved, there will be no shortage of four-axis machining centers on the mainland. After all, a simple four-axis machining center is also a four-axis machining center, isn''t it? That''s higher than a three-axis machining center, isn''t it?

    Many people once said that in the mainland, as long as any kind of foreign high-end equipment is copied, the weak industrial countries in the world will be happy. Yunfei thinks it''s really TMD bullshit.

    Not to mention anything else, for the four-axis machining center alone, after 20 years, although many domestic manufacturers can do it, the machining accuracy can not be compared with that of imported ones, and the cost is much higher than that of foreign equipment of the same grade.

    There are many domestic talents, but not enough. Most companies only value immediate interests. As long as the four axis machining center can be produced, even if it is simple, there is a huge market demand on the road. Research on five axis linkage machine tool? Don''t be kidding. Let''s not say anything else. Just investment can make most people retreat from their lofty ambitions!

    Although the five axis linkage CNC machine tool adds a rotation function on the x-axis to realize the angular rotation of the fourth axis compared with the four-axis machining center, there is only one more swing of the z-axis, but this is a small point. If you want to cross, it is like going to heaven!

    Moreover, after 20 years, most four-axis machining centers in China only install a fourth axis on the workbench, which is the lowest difficulty four-axis machining center in Chengdu!