As we all know, the selection of high-performance, high-reliability CNC systems, servo drives, and high-quality supporting components in machine tool design can greatly increase the reliability of domestic CNC machine tools. Because the same type of CNC machine tool is also used in the same type of CNC system, so the difference between the accuracy and performance of domestic machine tools and imported CNC machine tools, the gap is not too big, but also in the after-sales service and prices have a certain advantage, but The credibility of the two in the minds of users is not the same. This is a problem that needs to be solved in front of a domestic CNC machine tool manufacturer. There are many reasons for this, and the key is still at the source, that is, the design, service, and management level of the domestic CNC machine tool manufacturers.
The following describes how our company in the design and manufacture of multi-station CNC machine tools, through the reliability of design to enhance staff awareness of quality, quality of work to ensure product quality, improve the reliability of CNC machine tools, to provide users with satisfactory, applicable products, And continue to win the user orders.
1 Demonstrate the feasibility of product design solutions through process tests The multi-position CNC combination machine tool designed and manufactured by our company is a special machine tool for deep hole machining. Based on the in-depth understanding of the needs of users, first of all, we conducted a process test on the key technology involved in the user's needs, the “deep hole machining processâ€, and demonstrated the feasibility of the product design scheme through the process test to ensure that the designed product can meet the user’s needs. .
2 The modular design of the multi-station CNC machine tool with mature technology adopts the modular components verified by our company through mass production, such as the NC sliding table with linear rolling guide, the small drilling power head, high-precision CNC turntable, etc. .
3 Lessons Learned and Lessons We analyzed the quality information of previous production assembly machine tools and after-sales service feedback, and put forward improvement requirements such as the protection of the machine tool, wiring and appearance.
4 Selection of high quality control systems and components Machine tools use high-performance, high-reliability CNC systems, servo drives, supporting functional components, electrical components, and detection components to ensure machine reliability.
The CNC system of the machine tool uses the POWER MATE-D motion controller from Japan FANUC. It has two axis control functions and can control an analog/digital spindle. Two servo axes can be configured in one channel, and can also be configured in two. In the channel. The system has an integrated PLC that can connect up to 16 POWER MATE-D motion controllers together via the FANUC I/OLINK serial data transfer bus. Multiple motion controllers can share a CRT/MDI display. These characteristics make the distributed control system composed of the motion controller have good expandability, and are especially suitable for various multi-position numerical control combined machine tools with different work places.
The servo drive unit is equipped with FANUCa series digital AC servo system. High-precision CNC turntable closed-loop position detection components use round encoders produced by German HEIDENHAIN.
5 Correct use of the functions of the CNC
1. In the application of high-performance CNC systems, due to incorrect parameter settings and unreasonable logic control programs, CNC machine tools often leave the factory with problems. When users use them, they discover problems and affect the reputation of the products. If the pitch error compensation function of the application system corrects the positioning precision of the CNC rotary table, incorrect parameter settings will cause the rotary table to be rotated and positioned in the same direction, but will bring more and more errors; incorrect acceleration and deceleration time constants Setting will cause impact on the machine's transmission mechanism.
2. The macro function B of the application system realizes parametric programming and simplifies operation. According to the process features of deep hole machining, the macro function B of the system is used to implement parameterized programming, so that the user only needs to modify the corresponding process parameters (the total processing length, the number of stages occupied, and the Give speed, feed length, etc.) so that operators who do not understand CNC programming can operate the machine. In addition, the application of the workpiece number search function allows the machine to select the appropriate machining program when selecting different switches for machining different parts.
6 meticulously designed logic control program, enhanced diagnostics emphasis on the design of CNC machine logic control program, in addition to well-designed machine tools must be the logic control program, safety interlock function, but also use the system PLC has the information function, alarm function, design necessary Operational prompts and diagnostic information enhance the diagnostic capabilities of CNC machine tools and facilitate the user's operation and maintenance.
7 meticulous manufacturing, strict assessment The company's leadership attaches great importance to staff education, all employees use the quality of work to ensure product quality, strictly abide by the process specification, and insist on the evaluation of the 100-hour continuous operation of the CNC machine tool. The speed of the assessment operation is based on the user's required productivity. In the on-line debugging of numerical control machine tools, the FANUC CNC system's servo diagnosis function can be used to assist in checking the parts processing quality and assembly quality of the feed transmission mechanism.
8 Do a good job of software backup and version management of CNC machine tools FANUC POWER MATE-D motion controllers are equipped with flash memory cards, which can back up system parameters, PLC logic control programs and parts processing programs. When the system fails and the system needs to be replaced, the backup can be used to restore the system to normal operation quickly. Of course, it also facilitates the mass production of CNC machine tools and shortens the on-line debugging cycle.
9 Well-developed service tools Compile detailed manuals and maintenance manuals to guide users' use and maintenance. Do a good job of user training and after-sales service to satisfy users.
The following describes how our company in the design and manufacture of multi-station CNC machine tools, through the reliability of design to enhance staff awareness of quality, quality of work to ensure product quality, improve the reliability of CNC machine tools, to provide users with satisfactory, applicable products, And continue to win the user orders.
1 Demonstrate the feasibility of product design solutions through process tests The multi-position CNC combination machine tool designed and manufactured by our company is a special machine tool for deep hole machining. Based on the in-depth understanding of the needs of users, first of all, we conducted a process test on the key technology involved in the user's needs, the “deep hole machining processâ€, and demonstrated the feasibility of the product design scheme through the process test to ensure that the designed product can meet the user’s needs. .
2 The modular design of the multi-station CNC machine tool with mature technology adopts the modular components verified by our company through mass production, such as the NC sliding table with linear rolling guide, the small drilling power head, high-precision CNC turntable, etc. .
3 Lessons Learned and Lessons We analyzed the quality information of previous production assembly machine tools and after-sales service feedback, and put forward improvement requirements such as the protection of the machine tool, wiring and appearance.
4 Selection of high quality control systems and components Machine tools use high-performance, high-reliability CNC systems, servo drives, supporting functional components, electrical components, and detection components to ensure machine reliability.
The CNC system of the machine tool uses the POWER MATE-D motion controller from Japan FANUC. It has two axis control functions and can control an analog/digital spindle. Two servo axes can be configured in one channel, and can also be configured in two. In the channel. The system has an integrated PLC that can connect up to 16 POWER MATE-D motion controllers together via the FANUC I/OLINK serial data transfer bus. Multiple motion controllers can share a CRT/MDI display. These characteristics make the distributed control system composed of the motion controller have good expandability, and are especially suitable for various multi-position numerical control combined machine tools with different work places.
The servo drive unit is equipped with FANUCa series digital AC servo system. High-precision CNC turntable closed-loop position detection components use round encoders produced by German HEIDENHAIN.
5 Correct use of the functions of the CNC
1. In the application of high-performance CNC systems, due to incorrect parameter settings and unreasonable logic control programs, CNC machine tools often leave the factory with problems. When users use them, they discover problems and affect the reputation of the products. If the pitch error compensation function of the application system corrects the positioning precision of the CNC rotary table, incorrect parameter settings will cause the rotary table to be rotated and positioned in the same direction, but will bring more and more errors; incorrect acceleration and deceleration time constants Setting will cause impact on the machine's transmission mechanism.
2. The macro function B of the application system realizes parametric programming and simplifies operation. According to the process features of deep hole machining, the macro function B of the system is used to implement parameterized programming, so that the user only needs to modify the corresponding process parameters (the total processing length, the number of stages occupied, and the Give speed, feed length, etc.) so that operators who do not understand CNC programming can operate the machine. In addition, the application of the workpiece number search function allows the machine to select the appropriate machining program when selecting different switches for machining different parts.
6 meticulously designed logic control program, enhanced diagnostics emphasis on the design of CNC machine logic control program, in addition to well-designed machine tools must be the logic control program, safety interlock function, but also use the system PLC has the information function, alarm function, design necessary Operational prompts and diagnostic information enhance the diagnostic capabilities of CNC machine tools and facilitate the user's operation and maintenance.
7 meticulous manufacturing, strict assessment The company's leadership attaches great importance to staff education, all employees use the quality of work to ensure product quality, strictly abide by the process specification, and insist on the evaluation of the 100-hour continuous operation of the CNC machine tool. The speed of the assessment operation is based on the user's required productivity. In the on-line debugging of numerical control machine tools, the FANUC CNC system's servo diagnosis function can be used to assist in checking the parts processing quality and assembly quality of the feed transmission mechanism.
8 Do a good job of software backup and version management of CNC machine tools FANUC POWER MATE-D motion controllers are equipped with flash memory cards, which can back up system parameters, PLC logic control programs and parts processing programs. When the system fails and the system needs to be replaced, the backup can be used to restore the system to normal operation quickly. Of course, it also facilitates the mass production of CNC machine tools and shortens the on-line debugging cycle.
9 Well-developed service tools Compile detailed manuals and maintenance manuals to guide users' use and maintenance. Do a good job of user training and after-sales service to satisfy users.
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