How to obtain CNC machine tools with relatively little investment is a question worth discussing. Can you upgrade the original machine tool without buying a CNC machine tool and turn it into a CNC machine tool? The answer is yes. The experience of upgrading and transformation in the past few years tells us that this is promising, not only with good practical performance and short cycle time         , And can save a lot of money. The larger the machine tool being transformed, the more money saved. The following is an example of CNC remanufacturing conducted by a company:

    Rebuild the z axis of the right tool post. Replace the original trapezoidal lead screw (63 × 10 × 3600mm) with imported Rexroth ball screws, remove the light rod drive, and add a servo motor drive to repair the z-axis guide rail to repair the z-axis pressure plate and inserts.

    Design and manufacture of machine tool electronic control system. The FANUC 0it CNC system is selected. The FANUC AC digital servo motor is selected. The domestically-owned joint venture low-voltage electronic control component is used to design and develop the machine tool control logic diagram.

Finally, the electromechanical joint debugging of the machine tool. Debugging machine tool's x-axis and z-axis movements, debugging machine tool's geometric accuracy, debugging machine tool's coordinate accuracy, and using dual-frequency laser to detect the accuracy of each axis. Carry out machine tool auxiliary function debugging and run the machine continuously for 36 hours.

    After the transformation, the performance of the machine tool is stable and reliable. After more than one year of production verification, it meets the transformation requirements. The renovation cost of 1 million yuan is only equivalent to 1/15 of the purchase of CNC machine tools, which saves a lot of money for users. The machine tool has made great efforts for the plant to produce volutes in hydropower equipment, creating an output value of tens of millions of yuan.     The problems that need to be paid attention to for CNC upgrade. What kind of machine tools are suitable for CNC upgrade and remanufacturing? Experience has shown that vertical and horizontal lathes (especially large vertical and horizontal lathes), gantry milling upgrade CNC gantry milling, gantry planing upgrade CNC gantry milling, Upgrading of horizontal boring and milling machines and upgrading of CNC horizontal boring and milling machines and vertical and horizontal grinding machines     The effect is quite ideal.

    The numerical control upgrade must first redesign and remanufacture the machine part of the machine tool to make it meet the requirements of numerical control. Simply adding servo motor and CNC system can not achieve the purpose of upgrading. For this reason, generally do the following work:

    Replace the original trapezoidal lead screw with a ball screw to improve accuracy, reduce friction, grind and scrape the guide rails and paste or directly use linear rolling guide rails to refine the spindle system, improve the accuracy of the spindle, design an automatic cooling and chip removal system, and increase the degree of machine tool automation when necessary Increase the tool change mechanism-the automatic lubrication system designed and manufactured by the tool magazine manipulator.

    The CNC system and servo system must be determined and selected during the transformation. The function of the numerical control system is not as good as possible, and the system with more functions is generally more expensive. The domestic system and the imported system should be selected according to the needs. At present, there is still a gap between the domestic system and the imported system. It is generally better to choose the imported system for large high-precision equipment. But in recent years     The production system has made great progress and can be used reliably for general lathes and milling machines. The servo motor first selects the AC servo motor.

    The choice of remanufacturing CNC upgrade contracting company is also very important. To choose a company that has passed the qualification certification, the current remanufacturing industry is still very unregulated. The price of different companies for the transformation of the same machine tool is very different, sometimes up to 2-3 times. Those are not fixed     On the site, companies without a stable technical team cannot do remanufacturing. A good remanufacturing enterprise must have strong mechanical and electrical design capabilities and certain processing and manufacturing capabilities.

    For a manufacturing enterprise, improving production capacity often starts with technological management from the aspects of production management, manufacturing process, production equipment, etc., and these parts are mutually influenced and restricted. In the technical transformation, the selection of production equipment, CNC machine tool update, maintenance, procurement, etc. must be considered in what environment     Use, how to manage, how to achieve the best economic results and other issues.     

        The selection of manufacturing equipment is to serve the manufacture of some products. The selected equipment may be used for part of the processing of product parts, or it may be used for the processing of all processes. The level of manufacturing depends first on the design of the process, it will determine what methods and means to use for processing, and thus determines the basis for the use of equipment         This requirement is also the basis for technical organization and management of production. After the basic requirements for equipment selection are determined, it is also necessary to choose according to what technical level of equipment can be provided on the market. For most of the small and medium-sized batch manufacturing companies, it is a development trend to choose CNC machine tools to replace old machine tools or enhance production capacity.          

Comparing the performance of ordinary and CNC machine tools, CNC machine tools have the ability to process complex shaped parts, adapt to a variety of processing objects (strong flexibility); processing quality, precision and processing efficiency; adapt to CAD / CAM networking, suitable Integrated management of manufacturing and processing information; high utilization rate of equipment and low normal operating costs.   

        Choosing a CNC machine tool is a comprehensive technical issue. Now no matter domestic or foreign, it can produce and provide a variety of equipment. After decades of development, CNC machine tools have evolved into a huge family group that can complete a variety of processing and manufacturing requirements. How to choose suitable equipment from a wide variety of expensive equipment,         How to make these devices fully play a role in manufacturing and meet the future development of the enterprise, how to properly and reasonably purchase accessories, tools, software technology, after-sales technical services, etc. that are matched with the host, so that the purchased equipment can reach The investment ratio ... These issues must be considered by the majority of buyers, and one by one         Deal with the problem.