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As we all know, the high-performance, high-reliability numerical control system, servo drive device and high-quality matching components in the machine tool design can greatly improve the reliability of domestic CNC machine tools. Since the same type of CNC machine tool also uses the same type of CNC system, the difference between the precision and performance of the domestic machine tool compared with the imported CNC machine tool is not too big, and it still has certain advantages in after-sales service and price, but The credibility of the two in the user's mind is not the same. This is an urgent problem to be solved in front of the domestic CNC machine tool manufacturer. The reason is multi-faceted, and the key is still at the source, that is, the design, service and management level of domestic CNC machine tool manufacturers.
The following describes how our company can enhance the quality awareness of employees through the reliability design in the process of designing and manufacturing multi-station CNC combined machine tools, guarantee the product quality with work quality, improve the reliability of CNC machine tools, and provide users with satisfactory and applicable products. And continue to win user orders.
1 Demonstrate the feasibility of the product design scheme through the process test The multi-station CNC combined machine tool designed and manufactured by our company is a special machine tool for deep hole machining. On the basis of in-depth understanding of user needs, the first step is to conduct a process test on the key technology involved in user demand--"deep small hole processing technology", and demonstrate the feasibility of product design through process test to ensure that the designed product can meet user needs. .
2 The modular design of multi-station CNC combined machine tools with mature technology adopts our company's mass-produced modular components, such as CNC sliding table with linear rolling guide, small drilling power head, high-precision CNC turning table, etc. .
3 Summarize experience and lessons. Analyze the quality information of previous production combined machine tools and after-sales service feedback, and propose improvement requirements for such problems as protection, wiring and appearance of machine tools.
4 Select high-quality control system and parts machine tools to select high-performance, high-reliability CNC system, servo drive, supporting functional components, electrical components, and detection components to ensure machine reliability.
The numerical control system of the machine tool adopts the POWER MATE-D motion controller of FANUC of Japan. It has two-axis control function and can also control one analog/digital spindle. The two servo axes can be configured in one channel or two in two. In the channel. The system has an integrated PLC that connects up to 16 POWER MATE-D motion controllers via the FANUC I/OLINK serial data transfer bus. Multiple motion controllers can share a single CRT/MDI display. These characteristics make the distributed control system composed of the motion controller have good scalability, especially suitable for various multi-station CNC combined machine tools with different working positions.
The servo drive unit is equipped with the FANUCa series digital AC servo system. The closed-loop position detecting component of the high-precision CNC rotary table is selected from the circular grating produced by HEIDENHAIN.
5 Correct use of the function of the numerical control system High-performance numerical control system In the application, due to incorrect parameter setting and unreasonable logic control program, the CNC machine tool often carries problems with the factory, and it is found that there are problems when the user uses it, which affects the product. Reputation. For example, when the pitch error compensation function of the application system corrects the positioning accuracy of the CNC rotary table, the incorrect parameter setting will rotate the rotary table to the same direction, which will bring more and more errors; incorrect acceleration/deceleration time constant The setting will cause an impact on the machine's transmission mechanism.
The megafunction B of the application system implements parameterized programming to simplify the operation. According to the process characteristics of deep hole machining, the macro function B of the application system is used to realize parameterized programming, so that the user only needs to modify the corresponding process parameters on the corresponding screen when using (the total processing length, the number of times occupied by the hierarchy, and For speed, feed length, etc., the operator who does not understand CNC programming can also operate the machine. In addition, the workpiece number search function of the application system enables the machine to select the corresponding machining program by selecting the switch when machining different parts.
6 Carefully design the logic control program, enhance the diagnostic function, pay attention to the design of the logic control program of the CNC machine tool. In addition to carefully designing the logic control program and safety interlock function necessary for the machine tool, it also applies the information function and alarm function of the system PLC. Operational prompts and diagnostic information enhance the diagnostic functions of CNC machine tools to facilitate user operation and maintenance.
7 Carefully manufactured, rigorously assessing the company's leaders attaches great importance to employee education. All employees use the quality of work to ensure product quality, strictly abide by the process specifications, adhere to the 100h continuous operation of CNC machine tools, and assess the speed of the operation according to the user's required productivity. In the online debugging of CNC machine tools, the servo diagnosis function of FANUC numerical control system can be used to check the machining quality and assembly quality of the parts of the feed transmission mechanism.
8 Do a good job in software backup and version management of CNC machine tools
The FANUC POWER MATE-D motion controller is equipped with a flash memory card that backs up system parameters, PLC logic control programs and part program programs. When the system needs to be replaced, the backup can be used to restore the system to normal operation. Of course, it also facilitates the mass production of CNC machine tool manufacturers and shortens the online debugging cycle.
9 Construct a good service means to prepare detailed instructions for use and maintenance instructions to guide users in use and maintenance. Do a good job in user training and after-sales service to make users satisfied.
The following describes how our company can enhance the quality awareness of employees through the reliability design in the process of designing and manufacturing multi-station CNC combined machine tools, guarantee the product quality with work quality, improve the reliability of CNC machine tools, and provide users with satisfactory and applicable products. And continue to win user orders.
1 Demonstrate the feasibility of the product design scheme through the process test The multi-station CNC combined machine tool designed and manufactured by our company is a special machine tool for deep hole machining. On the basis of in-depth understanding of user needs, the first step is to conduct a process test on the key technology involved in user demand--"deep small hole processing technology", and demonstrate the feasibility of product design through process test to ensure that the designed product can meet user needs. .
2 The modular design of multi-station CNC combined machine tools with mature technology adopts our company's mass-produced modular components, such as CNC sliding table with linear rolling guide, small drilling power head, high-precision CNC turning table, etc. .
3 Summarize experience and lessons. Analyze the quality information of previous production combined machine tools and after-sales service feedback, and propose improvement requirements for such problems as protection, wiring and appearance of machine tools.
4 Select high-quality control system and parts machine tools to select high-performance, high-reliability CNC system, servo drive, supporting functional components, electrical components, and detection components to ensure machine reliability.
The numerical control system of the machine tool adopts the POWER MATE-D motion controller of FANUC of Japan. It has two-axis control function and can also control one analog/digital spindle. The two servo axes can be configured in one channel or two in two. In the channel. The system has an integrated PLC that connects up to 16 POWER MATE-D motion controllers via the FANUC I/OLINK serial data transfer bus. Multiple motion controllers can share a single CRT/MDI display. These characteristics make the distributed control system composed of the motion controller have good scalability, especially suitable for various multi-station CNC combined machine tools with different working positions.
The servo drive unit is equipped with the FANUCa series digital AC servo system. The closed-loop position detecting component of the high-precision CNC rotary table is selected from the circular grating produced by HEIDENHAIN.
5 Correct use of the function of the numerical control system High-performance numerical control system In the application, due to incorrect parameter setting and unreasonable logic control program, the CNC machine tool often carries problems with the factory, and it is found that there are problems when the user uses it, which affects the product. Reputation. For example, when the pitch error compensation function of the application system corrects the positioning accuracy of the CNC rotary table, the incorrect parameter setting will rotate the rotary table to the same direction, which will bring more and more errors; incorrect acceleration/deceleration time constant The setting will cause an impact on the machine's transmission mechanism.
The megafunction B of the application system implements parameterized programming to simplify the operation. According to the process characteristics of deep hole machining, the macro function B of the application system is used to realize parameterized programming, so that the user only needs to modify the corresponding process parameters on the corresponding screen when using (the total processing length, the number of times occupied by the hierarchy, and For speed, feed length, etc., the operator who does not understand CNC programming can also operate the machine. In addition, the workpiece number search function of the application system enables the machine to select the corresponding machining program by selecting the switch when machining different parts.
6 Carefully design the logic control program, enhance the diagnostic function, pay attention to the design of the logic control program of the CNC machine tool. In addition to carefully designing the logic control program and safety interlock function necessary for the machine tool, it also applies the information function and alarm function of the system PLC. Operational prompts and diagnostic information enhance the diagnostic functions of CNC machine tools to facilitate user operation and maintenance.
7 Carefully manufactured, rigorously assessing the company's leaders attaches great importance to employee education. All employees use the quality of work to ensure product quality, strictly abide by the process specifications, adhere to the 100h continuous operation of CNC machine tools, and assess the speed of the operation according to the user's required productivity. In the online debugging of CNC machine tools, the servo diagnosis function of FANUC numerical control system can be used to check the machining quality and assembly quality of the parts of the feed transmission mechanism.
8 Do a good job in software backup and version management of CNC machine tools
The FANUC POWER MATE-D motion controller is equipped with a flash memory card that backs up system parameters, PLC logic control programs and part program programs. When the system needs to be replaced, the backup can be used to restore the system to normal operation. Of course, it also facilitates the mass production of CNC machine tool manufacturers and shortens the online debugging cycle.
9 Construct a good service means to prepare detailed instructions for use and maintenance instructions to guide users in use and maintenance. Do a good job in user training and after-sales service to make users satisfied.
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