First, pre-management
1. According to the need to process the typical parts to buy CNC machine tools.
2. Equipment selection should consider the mechanical part of the machine tool, the ease of operation of the control system, and the ease of maintenance. In particular, attention should be paid to the fact that the control system uses the systems of the same manufacturer that are familiar to the company and have advanced performance as much as possible. At the same time, we must consider the numerical control equipment after-sales service, personnel training, installation and commissioning, machine tool accessories, spare parts, tooling systems, programming systems, provide comprehensive information and many other aspects to facilitate future use.
3. According to the preliminary selection of the technical performance of CNC machine tools for market research, in particular to the use of similar performance CNC machine tool manufacturers to conduct a survey to provide a variety of effective reference data.
4. The equipment must be carefully installed and adjusted after entering the factory, which is very important for future operation, maintenance and management. The installation and commissioning process is also a training process for operators, programmers, maintenance personnel and management personnel. Our company usually trains personnel in the process of installation and commissioning, because at this time there are machine tool manufacturers on-site instruction, which is convenient for us to master the equipment operation technology and maintenance technology.
5. The NC and PC parameters of the attached accessories are very important for future maintenance work. It is better to confirm the actual NC parameters and PC parameters (contrast with the NC parameters and ladder diagram provided by the manufacturer), using a computer floppy disk. Make a copy of this data to prevent loss of important data.
6. The numerical control system has strict requirements on the power supply. The general working voltage is 220V±10%. Most of China's power grids are unstable in voltage, fluctuate, and often have large interference sources near the power supply. These will cause random distortion of the power supply waveform, directly affect the stability of the CNC system, and accelerate the damage of electronic devices. Our company is equipped with SJW auto-compensation power regulators for CNC equipment, providing a strong guarantee for the normal operation of the system.
Second, the use of maintenance
1. CNC machine tools are complex and difficult to operate. Our numerical control equipment operators are selected from those who have general machine tool production experience. After passing the experience of the CNC machine tools, the masters pass, help, and bring them to master the CNC machine tool performance, they can operate independently. In view of the particularity of CNC machine tools, we have set up a numerical control section that is convenient for centralized management. At the same time, we have set up a CNC professional at the technical school of the factory to achieve the professionalization and professionalization of operators and keep the team relatively stable.
2. Organizations with college education and professional theoretical knowledge and practical skills, and highly responsible, willing to study, professional dedication to form a full-time programming team. This is also one of the ways to improve equipment utilization and give full play to equipment performance.
3. The equipment management department shall formulate the operating maintenance rules and strengthen the business training so that the operators can operate the CNC equipment correctly and try to avoid downtime due to improper operation. At the same time, the inspection system and the regular adjustment system for machine tool accuracy were established, and the NC equipment maintenance files and handover records were established. The operation status and fault conditions of the CNC equipment were recorded in detail to provide reference for future operations and maintenance.
4. Strengthen maintenance. Maintenance is one of the effective ways to increase equipment utilization and reduce failure rates, and it is also an important measure for preventive maintenance. For example, our company Vturn-46 Taichung Precision CNC lathe air filter and radiator of the refrigerator, we require regular cleaning, otherwise it will be due to large dust, through the reduction of air volume, causing high-voltage switch malfunction, resulting in fault shutdown.
Third, maintenance
1. Maintenance is to maintain the state of the CNC machine tool in perfect condition so that it can fully function. In order to strengthen the maintenance force, our company has established a mechatronics group consisting of mechanical and electrical specialists exclusively in the mechanical power company to undertake the maintenance work of the entire company's numerical control equipment. They are made up of experienced technicians, experienced teachers, and university students with strong professional knowledge, providing a powerful guarantee for the normal operation of our CNC equipment.
2. Some machine tool failures are caused by unreasonable structure or improper maintenance. To sum up maintenance experience in time can provide important basis for future equipment selection and equipment management. If we find that the CK3263A CNC lathe is bending and deforming in the X-direction inlaid steel guide rail during use, after a comparative analysis, it is considered that the running time is too long and there is no weight on the turret tool holder. This is a congenital deficiency of the machine tool, which is the future selection. The model provides a reliable basis; for example, we use the TND360 CNC lathe. During the work, we found that the tool holder is not positioned correctly. When the tool holder is opened, it is found that the inside of the tool holder enters the coolant and there is corrosion. As a result, the movement is inaccurate, so the parts are processed at ordinary times. Sweep the coolant and swarf in time to reduce the occurrence of malfunctions.
3. Strengthen professional training and improve the technical level of maintenance personnel.
4. Make bold technical improvements where existing equipment often fails. For example, in our company's XH754 machining center, during use, it is found that the main shaft is not tightly sealed, leading to the entry of coolant and corrosion of the spindle bearings, which seriously affects the accuracy of the spindle. (The bearing is Japan NSKC class ball bearing, expensive, each set is about 15,000 yuan.) The technicians believe that the original spindle seal is a labyrinth seal and the lubrication is NBU-15 grease lubrication. And no hydraulic lubrication oil lubrication, if the seal is not easy to cause the coolant to enter the spindle, after the adoption of HG4-692-67J type skeleton seal, and in the front of the spindle plus a flange compression ring, so that the above problems Solved. However, in use, it was found that when the equipment was running for a long time, the temperature rise of the main shaft was somewhat high, due to the standard seal ring used in the seal ring, and the inner hole was slightly oversized. We replaced the seal ring with sandpaper. The inner hole is slightly polished. After installation, the sealing effect and normal temperature rise of the spindle are guaranteed.
In short, as long as skilled operation, meticulous maintenance, strict management, can fully display the effectiveness of numerical control equipment.
Talking about the management, use and maintenance of numerical control equipment
CNC machine tools are a high-precision, high-efficiency, flexible production equipment. The status of enterprises using CNC machine tools, and the ability to manage and maintain CNC machine tools have all determined the level of utilization of CNC equipment and the efficiency of enterprises. Now I have talked about my company's experience in managing, using, and maintaining CNC machine tools.