Intelligent Industrial Empire

When Rongcheng Xinkaixing Ball Screw Factory once again began trial production of ball screws, ball screw nuts and matching balls with the process developed by Yunfei, Jiuyi Heavy Industry started their first CNC lathes. The production of various spare parts.

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

After all, the current ordinary lathes undergoing numerical control transformation, it is just to replace the polished rod and trapezoidal screw used for transmission on the ordinary lathe to become a ball screw with higher transmission accuracy, and remove the operating handle used by workers to manually control the machine tool. It's just a stepping motor or servo motor drive controlled by PLC.

The CNC lathe has more electrical parts than ordinary lathes, but there are fewer mechanical parts than ordinary lathes.After all, the mechanical device used to control the automatic machine tool during the machining process-the gear set is no longer needed on the CNC machine tool.Compared with ordinary machine tools, CNC lathes are equipped with a set of slide boxes for automatic mechanical control, and a gear set for selection of feed speed, and the weight is reduced by at least several hundred kilograms.

Of course, the only shortcoming of this improvement is the decrease in rigidity of the machine tool.

No matter how advanced CNC machine tools are, they cannot be compared with ordinary machine tools in terms of rigidity.

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

Of course, if there are no heavy-duty CNC machine tools with fairly reliable precision, and many heavy-duty parts with high precision grades, we would rather choose ordinary machine tools with stable machining quality and reliable precision.

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

Fortunately, many domestic tool manufacturers have begun to study those high hardness, wear-resistant CNC tools used in CNC machine tools.In the Rongcheng Economic and Technological Development Zone, there is a cemented carbide factory that was moved from the tomb of a dinosaur and is now building a basic factory.

Many people think that the reason that the factory moved to the Economic Development Zone was because of the existence of the company that produces machine tools and intends to enter the CNC machine tool market.The Chengdu city government thinks so, and the Economic Development Zone Management Committee thinks so. Even the people in that factory think it is the reason.When Yun Fei heard such comments from others, he just secretly smiled.In his world, that cemented carbide factory will also move the factory to this side after the aerospace system factory is moved.

The small city of Dinosaur Tomb is simply not suitable for the development of tool manufacturers that originally served the machining industry.

This factory, in this world, may benefit from the development of its September 1st Heavy Industry. At least, they will not have much development from beginning to end like in their own world, and they are not very famous in China. Not to mention being abroad.Because that company only produces some tools for ordinary machine tools.

"The grinder is leveled and found at least within one μ." Yunfei said to the worker who was leveling the upper grinding wheel on the rail grinder.

The tool used by workers to level the grinding wheel is not the most commonly used dial indicator in the machining industry during finishing.Because most of the machining of mechanical parts, the alignment range is between one wire and two wires.But rail grinders are not ordinary processing equipment, but the most precise machining equipment in China in this era.

Therefore, the tool used by the worker for aligning is a dial indicator with a small grid representing one μ.The pointer moved one square, and the outside change was only one thousandth of a millimeter.

"When setting the knife, be lighter, 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 slower than that of the grinding wheel on the rail grinder when it first left the factory. Running slowly, Yun Fei brought Yu Jianhua, the workshop director of the precision machining workshop, and several mechanical engineers from the Soviet Union as they watched the entire Jiuyi Heavy Industry's best skilled workers quickly leveling and aligning the guide rails of the gantry milling machine on the fixed workbench. The bed of the lathe was waiting nervously.

The production of ordinary lathes is nothing but a pediatric gadget for hundreds of professional skilled workers who produce various types of machine tools and dozens of mechanical engineers from the Soviet Union.Although there have been many problems before, it is not because of the lack of technical strength of the entire factory, but because of the imperfect management system of the factory, and the human factors caused by the change of the environment.

After the ball screw was produced and produced, Yunfei began to keep in the production workshop of Jiuyi Heavy Industry, following the processing flow of the most critical part of the bed, with several skilled mechanical engineers responsible for this design, and constantly Inside the various production workshops.

Everyone in the factory is servicing this CNC lathe, which is not yet known whether it will be successful.

In just seven days, various parts and accessories of the first CNC lathe of Jiuyi Heavy Industry have entered the finishing workshop from the rough state.After finishing finishing, besides the gears in the spindle box used to transmit the speed, some surface high-frequency hardening is required, and then it can be built into a dust-free workshop by Yunfei, and it has not been put into use. Everyone does not understand The final assembly is done in the empty workshop.

You should know that the specifications of this dust-free assembly workshop are constructed in accordance with the electronic components production workshop of Jiuyi Heavy Industry. The construction cost alone is four times that of other workshops!

When 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 heavily in purchasing imported central air conditioners and turn this assembly workshop into a dust-free constant temperature workshop. , Making Yunfei depressed.

For those high-precision and sophisticated 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, there is no big impact at all.

After all, the processing level of high-precision CNC machine tools can be calculated by a few tenths of a μ, while the processing accuracy of ordinary CNC machine tools can be calculated by wire.Just the difference between the two units is counted as ten times.

In the world of Yunfei, many CNC machine tool manufacturers advertise that their CNC machine tools can achieve a production accuracy of zero 1μ, but there is a theoretical design accuracy ahead.The actual machining accuracy can be guaranteed to a trace, and it is definitely a CNC machine with fairly good accuracy.

“Don’t eat too much of the knife. It’s the final fine grinding. Otherwise, a lot of stress will be generated during the cutting process, which will remain inside the bed of the machine tool.” Seeing the rail grinder, the grinder moved forward quickly. , A lot of sparks were thrown out behind, Yun Fei jumped anxiously.

Although the amount of knife 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 eager, the more likely to have problems.At this time, if there is a problem with the finishing, this week's time can be wasted.

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

Originally, the upper surface of an ordinary lathe can also perform the machining accuracy of the ball screw during operation, but the structure of an ordinary machine tool is still very different from that of a CNC machine tool.The same ball screw can meet the design accuracy requirements on ordinary machine tools, but it may not be possible on professional CNC machine tools.

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

The ordinary machine tool is transformed into a CNC machine tool. Although the ball screw driven by a motor is used in the feed transmission, the gears in the headstock are still those of ordinary machine tools.Rigidity is better than those of simple CNC machine tools, but the machining accuracy and surface quality cannot be compared with simple CNC machine tools.

Although the surface of the ball screw produced by the ball screw factory has been high-frequency quenched to a Rockwell hardness of 58-62 degrees, Yunfei is very worried about wear 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 machining, you are doing the final finishing, not rough machining..." As the rails on the bed of the depot gradually become smoother, although the sparks behind the grinder are getting smaller and smaller, it is not Still roaring on the side.

This is the first CNC machine tool of Jiuyi Heavy Industry, and it must be enriched in the precision machining workshop of Jiuyi Heavy Industry.Yun Fei didn’t want to use it for a few years. The first CNC lathe he produced was because of the excessive cutting force during the final finishing of the bed. The residual stress in the bed caused the machine tool rail to bend, causing this machine to have an incomparable effect. Significantly symbolic reduction in machine accuracy.

Finally, under the roar of Yun Fei, the bed of the first experimental CNC lathe of Jiuyi Heavy Industry completed the final finishing process. Under the ten-ton crane hoisting, he walked off the workbench of the rail grinder.

"Lao Zhao, Lao Gu, it's up to you now. Although the design accuracy of this CNC lathe is not high, I hope that Jiuyi Heavy Industries can reach a level far exceeding the design accuracy requirements. Therefore, I hope you can The guide rails of this machine bed are ground at your highest level. I don’t require you to achieve accuracy of level two or higher, but I hope to see level four or even level three accuracy..." There is no problem with finishing. Yun Fei took a deep breath.