Smart Industrial Empire

When Xinkaixing Ball Screw Factory in Rongcheng once again started to trial-produce ball screws, ball screw nuts and matching balls with the technology formulated by Yunfei, Jiuyi Heavy Industry started their first CNC lathe. Production of spare parts.

The bed and various castings are ready-made. After all, Jiuyi Heavy Industry tried to produce ordinary lathes from the beginning.The bed of the ordinary lathe with a rotation diameter of 400mm that Yunfei chose at the beginning is basically the same as that of the CNC machine tool. The only difference is that the gears in the headstock are more precise than ordinary lathes.

After all, the CNC transformation of ordinary lathes today is just to replace the polished rods and trapezoidal screws used for transmission on ordinary lathes to become ball screws with higher transmission accuracy, and remove the operating handles used by workers to manually control the machine tools. It is only driven by a stepper motor or a servo motor controlled by a plc.

In addition to the electrical parts on the CNC lathe, there are many more electrical parts than the ordinary lathe, but there are fewer mechanical parts than the ordinary lathe.After all, the gear set, the mechanical device used to control the automation of the machine tool during the machining process, is not needed on the CNC machine tool.Compared with ordinary machine tools, CNC lathes lack a set of slide boxes for mechanical automatic control and a gear set for feed speed selection, and the weight must be reduced by at least several hundred kilograms.

Of course, the only disadvantage brought about by such an improvement is the reduction in the rigidity of the machine tool.

No matter how advanced the CNC machine tool is, it cannot compare with ordinary machine tools in terms of rigidity.

Ordinary machine tools, because there are a large number of gear sets used to transmit power, so in terms of structure, especially when running at full load, they far exceed CNC machine tools.Therefore, even in Yunfei’s world, at that time, the biggest role of CNC machine tools was to process small parts with small blank allowances, as well as semi-finishing and finishing large workpieces that had been removed by ordinary machine tools.

certainly.If there is no heavy-duty CNC machine tool with fairly reliable precision, many heavy-duty parts with relatively high precision grades are processed, and those ordinary machine tools with relatively stable processing quality and reliable precision are preferred.

CNC machine tools need to keep up with the development of cutting tools, otherwise, even the best CNC machine tools are useless.

Fortunately, many cutting tool manufacturers in China are beginning to study the high hardness and wear-resistant CNC cutting tools used in CNC machine tools.In Rongcheng Economic and Technological Development Zone, there is a cemented carbide factory that was moved out of the dinosaur grave.The basic plant is now being built.

Many people believed that the reason why the factory moved to the Jingkai District was because of the existence of Jiuyi Heavy Industry, a company that produced machine tools and planned to enter the CNC machine tool market.The Rongcheng City Government thinks so, and the Management Committee of the Economic and Technological Development Zone also thinks so, and even the people in that factory think this is the reason.When Yun Fei heard other people's comments like this, he just smiled inwardly.In his world, the cemented carbide factory will also move the factory here after the aerospace system factory moves here.

The small city of dinosaur graves.It is simply not suitable for the development of tool manufacturers that originally provided supporting services for the machining industry.

This factory, in this world, may benefit from the development of its own Jiuyi Heavy Industry.At least, they won't have much development from beginning to end like they did in their own world, and they are not very famous in China.Not to mention abroad.Because that company only produces some cutting tools used by ordinary machine tools.

"Level the grinder, at least find it within [-] μ." Yun Fei said to the worker who was leveling the grinding wheel on the guide rail grinder.

A tool used by workers to level grinding wheels.It is not the most commonly used dial indicator for finishing in the machining industry.Because most of the processing of mechanical parts, the alignment range is between one thread and two threads.But the guide rail grinding machine is not an ordinary processing equipment, but the most sophisticated machining equipment in China in this era.

Therefore, the tool used by workers for alignment is a dial gauge with a small grid representing one μ.The pointer moves one division, and the change on the outside is only a thousandth of a millimeter.

"Be lighter when setting the knife, otherwise it will affect the subsequent processing..." In the precision machining workshop of Jiuyi Heavy Industry, as the machine has been overhauled, the machining accuracy is even better than when it first left the factory. Slowly running, Yunfei led the workshop director of the precision machining workshop, Yu Jianhua, and several mechanical engineers from the Soviet Union, while watching the workers with the best technology in the entire Jiuyi Heavy Industry quickly level and align the fixed workbench in the middle of the guide rails of the gantry milling machine. lathe bed, looking forward nervously.

The production of ordinary lathes is just a child's play for hundreds of professional skilled workers who produce various types of machine tools, as well as dozens of mechanical engineers from the Soviet Union.Although there were a lot of problems in the past, they were not caused by the insufficient technical strength of the whole factory, but because of the imperfection of various management systems at the beginning of the factory, as well as human factors caused by the workers changing the environment.

After the ball screw was produced, Yunfei began to stay in the production workshop of Jiuyi Heavy Industry Co., Ltd., following the processing process of the most critical part of the bed, and led several skilled mechanical engineers in charge of this aspect of the design. It is transferred in various production workshops.

All the people in the factory are serving this CNC lathe, which is not yet known whether it will be successful.

In just seven days, various spare parts of Jiuyi Heavy Industry's first CNC lathe have entered the finishing workshop from the rough state.After the finishing machining is completed, except for the gears in the headstock that are used to transmit the speed and need some surface high-frequency quenching, it can be built into a dust-free workshop by Yunfei. It has not been put into use, and everyone does not understand. The final assembly is carried out in the empty workshop for what it is used for.

You know, this dust-free assembly workshop was built according to the specifications of Jiuyi Heavy Industry's electronic component production workshop. The construction cost alone is four times that of other workshops!

After Sun Lin and Situ Heyun knew that Yunfei's workshop was used for the assembly of CNC machine tools, they clamored for Yunfei to invest a lot of money in purchasing imported central air conditioners to turn this assembly workshop into a dust-free constant temperature workshop. , making Yunfei very depressed.

For those high-precision five-axis or above precision CNC machine tools, the constant temperature workshop has a great impact on improving the accuracy of the machine tools, but for these ordinary CNC machine tools, it has little impact at all.

After all, for high-precision CNC machine tools, the processing level can be calculated in fractions of μ, while the processing accuracy of ordinary CNC machine tools can be calculated in silk.Just the difference of two units counts in ten times.

In Yunfei's world, many CNC machine tool manufacturers advertise that their CNC machine tools can achieve a production accuracy of 1μ, but there is a theoretical design accuracy in front of that.The actual processing accuracy can be guaranteed to a trace, and it is definitely a CNC machine tool with quite good accuracy.

"Don't eat too much. It's the final fine grinding now, otherwise a lot of stress will be generated during the cutting process, which will remain inside the bed of the machine tool." Seeing the guide rail grinder, the grinder is moving forward quickly , a large number of sparks were thrown out to the back, and Yun Fei was so anxious that he jumped up and down.

Although the cutting capacity is large, the cutting speed is fast, and the processing efficiency is high, Yunfei does not need efficiency at this time.

In production, especially in finishing, the more urgent you are, the easier it is to go wrong.By this time, if there is a problem with the finishing process, this week's time can be wasted.

The ball screw factory is waiting for the test results here!

Originally, the machining accuracy of the ball screw during operation can also be performed on ordinary lathes, but the structure of ordinary lathes is still very different from that of CNC machine tools.The same ball screw can meet the design accuracy requirements on ordinary machine tools, but it may not be able to achieve it on professional CNC machine tools.

This one doesn't even have much to do with the assembly aspect.

Ordinary machine tools are transformed into CNC machine tools. Although motor-driven ball screws are used in the feed transmission, the gears in the headstock are still those gear sets of ordinary machine tools.The rigidity is better than those simple CNC machine tools, but the machining accuracy and the processed surface quality cannot be compared with simple CNC machine tools.

Although the surface of the ball screw produced by the ball screw factory has reached a Rockwell hardness of 58-62 degrees after high-frequency quenching, Yunfei is very worried about wear and tear during heavy-duty cutting.After all, there is really no way to guarantee the accuracy of the balls produced now to match the ball screw.

"Pay attention to the sparks of processing, you are doing the final finishing, not roughing..." As the guide rails on the bed of the car factory gradually become smooth, although the sparks generated behind the grinder are getting smaller and smaller, Yun Fei Still roaring on the side.

This is Jiuyi Heavy Industry's first CNC machine tool, and it must be enriched in Jiuyi Heavy Industry's precision machining workshop.Yunfei didn’t want to use it for a few years. The first CNC lathe produced by himself was due to the excessive cutting force during the final finishing of the bed, and the residual stress in the bed caused the guide rails of the machine to bend, resulting in this machine. Significant symbolic reduction in machine tool accuracy.

Finally, under Yunfei's roar, the bed of Jiuyi Heavy Industry's first experimental CNC lathe completed the final fine grinding process, and stepped off the workbench of the guide rail grinder under the ten-ton crane hoist.

"Lao Zhao, Lao Gu, it's up to you now. Although the design precision of this CNC lathe is not high, I hope that Jiuyi Heavy Industry can reach a level far exceeding the design precision requirements. Therefore, I hope you can put The guide rails of this machine bed are ground with your highest level, I don’t require you to achieve a precision above the second level, but I hope to see a level four, or even a level three accuracy...” There was no problem with the finishing, Yun Fei let out a long breath. (To be continued..)