Chapter 188 (1/2)

When Chengdu xinkaixing ball screw factory started trial production of ball screw, ball screw nut and supporting ball again with the process formulated by Yunfei, Jiuyi heavy industry began the production of various parts of their first CNC lathe.

The bed and all kinds of castings are ready-made. After all, from the beginning, the trial production of 91 heavy industry is an ordinary lathe. At the beginning, the bed of an ordinary lathe with a rotation diameter of 400mm selected by Yun Fei is generally no different from that of a CNC machine tool. The only difference is that the precision of the gears in the headstock is higher than that of an ordinary lathe.

After all, the NC transformation of the current ordinary lathe is just to replace the polished rod and trapezoidal screw used for transmission on the ordinary lathe, turn it into a ball screw with higher transmission accuracy, remove the operating handle used by workers to manually operate and control the machine tool, and replace it with the drive of stepping motor or servo motor controlled by PLC.

CNC lathes have more electrical parts than ordinary lathes, but less mechanical parts than ordinary lathes. After all, the gear set, which is used to control the automation of the machine tool in the machining process, is not needed on the NC machine tool. Compared with ordinary machine tools, CNC lathe has one less slide box equipped with a set of automatic mechanical control, one less gear set for feed speed selection, and the weight must be reduced by at least hundreds of kilograms.

Of course, the only deficiency brought by such improvement is the reduction of machine tool rigidity.

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

Ordinary machine tools, because there are a large number of gear sets used to transmit power, are far more than CNC machine tools in structure, especially when running at full load. Therefore, even in Yunfei's world, in that era, the biggest role of CNC machine tools was to process small parts with small blank allowance and semi finishing and finishing, which had been removed by ordinary machine tools.

Of course, if there is no heavy CNC machine tool with quite reliable precision, for the processing of many heavy parts with high precision level, we prefer to choose ordinary machine tools with stable processing quality and reliable precision.

CNC machine tools need to keep up with the development of cutting tools, otherwise, no matter how good CNC machine tools are in vain.

Fortunately, many domestic tool manufacturers have begun to study the high hardness and wear-resistant NC tools used by NC machine tools. In Chengdu Economic and Technological Development Zone, there is a cemented carbide factory moved out of the dinosaur tomb, and now the basic plant is being built.

Many people believe that the reason why the factory moved to the economic development zone is because of the existence of Jiuyi heavy industry, an enterprise that produces machine tools and intends to enter the CNC machine tool market. Chengdu city government thinks so, and so does the Management Committee of the economic development zone. Even the people of that factory think so. When Yunfei heard such comments from others, he just laughed in his heart. In his world, the cemented carbide factory will also move here after the aerospace system factory moves here.

The small city of dinosaur tomb is not suitable for the development of tool manufacturers that originally serve the machining industry.

This factory, in this world, may benefit from the development of its own 91 heavy industry. At least, they will not have much development from beginning to end, as in their own world. They are not much famous at home, let alone abroad. Because that company only produces some cutting tools used in ordinary machine tools.

”Grinder leveling, find at least one μ Within. ” Yun Fei said to the worker who was leveling the grinding wheel on the guide rail grinder.

The tool used by workers to level the grinding wheel is not the most commonly used dial indicator in finishing machining in the machining industry. Because the processing of most mechanical parts, the alignment range is between one thread and two threads. However, the guideway grinder is not an ordinary processing equipment, but the most precise machining equipment in China in this era.

Therefore, the tool used by workers to find the right one is a small box representing one μ Dial indicator. When the pointer moves one grid, the change outside is only one thousandth of a millimeter.

”Set the knife gently, otherwise it will affect the later processing...” in the precision processing workshop of 91 heavy industry, the grinder on the guide rail grinder, which has been overhauled and has better processing accuracy than when it just left the factory, runs slowly, With Yu Jianhua, the workshop director of the precision machining workshop, and several mechanical engineers from the Soviet Union, Yun Fei looked forward nervously while watching the best skilled workers of the whole 91 heavy industry quickly level and align the lathe bed on the fixed workbench in the middle of the guide rail of the gantry milling machine.

The production of ordinary lathes is nothing more than a childish thing for hundreds of professional and technical workers who produce all kinds of machine tools and dozens of mechanical engineers from the Soviet Union. Although there are many problems ahead, it is not because the technical strength of the whole factory is not enough, but because of the imperfections of various management systems built at the beginning of the factory and the human factors caused by workers changing the environment.

After the ball screw and its production, Yunfei began to stay in the production workshop of 91 heavy industry, followed the processing process of the most critical bed part, and continuously transferred in each production workshop with several skilled mechanical engineers responsible for this design.