Under the environment of continuous advancement of scientific and technological innovation, the mold industry is developing in the direction of digitalization and informatization. In this process, the application of CNC machining technology is particularly critical, which can not only promote the innovation of mold manufacturing process, but also greatly improve the quality and production efficiency of products.
1 Advantages of CNC machining technology
1.1 High precision and stability
Numerical control machining technology is known for its high precision and stability of the machining process. This advantage is mainly due to the precise control of the machining process by the CNC system. Through the preset computer program, the CNC machine can be processed according to the established parameters and paths, thus ensuring the accuracy and consistency of each processing. Compared with traditional manual or semi-automatic machining methods, CNC machining greatly reduces errors caused by human factors, such as operator fatigue or skill differences. In addition, the digital control system in the CNC machining process can also monitor and adjust the machining state in real time, further ensuring the machining accuracy and stability.
1.2 High efficiency and flexibility
Another significant advantage of CNC machining technology is its high efficiency and flexibility. Through the automatic control of computer program, CNC machining can continuously and quickly complete complex machining tasks, which greatly improves the production efficiency. For example, in traditional machining methods, replacing machining tools or adjusting machining parameters often requires a long time and manual intervention, while CNC machine tools can automatically complete these adjustments in a short time, thereby shortening the production cycle.
2 Application of CNC machining technology in mold production
2.1 CNC machining technology in mold production
(1) CNC turning technology.
CNC turning technology is widely used in the field of mold manufacturing, especially in the processing of rod, shaft and disk molds. Since the introduction of CNC lathes in the machinery and mold manufacturing industry, how to give full play to the efficiency of CNC lathes, improve operating efficiency, and reduce resource waste has become a hot issue in the industry. The application of CNC turning technology in the mold manufacturing process can improve the manufacturing accuracy and production efficiency to a certain extent, and help enterprises to realize the optimal allocation and efficient use of resources. In addition, in view of the diversity of mold materials, CNC turning technology realizes flexible processing of different hardness and toughness materials by adjusting cutting parameters and selecting appropriate tool materials, further improving resource utilization efficiency and reducing material waste. This not only helps enterprises to achieve cost control, but also promotes the practice of green manufacturing concept, laying a solid foundation for the sustainable development of the mold manufacturing industry.
(2) EDM technology.
At present, the application range of EDM technology in mold manufacturing is gradually expanding. The outstanding advantage of this technology is to deal with special material molds that are difficult to cope with traditional cutting methods, as well as molds with complex structures or specific thermal impact needs for processing methods. However, although EDM technology plays an important role in mold manufacturing, the problem of its relatively slow processing speed is always a limiting factor. In the context of mass production of molds, especially in the case of urgent project time and short delivery time, this shortcoming is particularly prominent, which may affect the production efficiency and market competitiveness of enterprises. Therefore, the field of mold manufacturing is actively exploring how to overcome its speed deficiencies through technological innovation and process optimization while retaining the advantages of EDM technology. For example, the development of more efficient EDM equipment, the optimization of electrode material and structural design, and the use of advanced processing strategies and path planning are the current research hotspots.
(3) CNC milling technology.
With the progress of society and the vigorous development of machinery manufacturing industry, the requirements for product manufacturing accuracy are becoming more stringent, and the accuracy requirements of molds are also increasing. However, the traditional semi-automatic or automatic milling machine has limitations in processing accuracy and has been unable to meet the current mold manufacturing standards. Insufficient precision will bury hidden dangers for production, and the production repair caused by quality problems will seriously affect the production efficiency. The CNC milling machine realizes the automation and intelligence of the machining process through the high-precision CNC system control, which greatly improves the machining accuracy and stability of the mold. Its precise tool path planning and automatic compensation function effectively reduce human error and ensure that the manufacturing accuracy of the mold reaches or even exceeds the design requirements.
2.2 Application of CNC machining technology
(1) The application of optimizing the surface quality of mold processing.
CNC machining technology represents the advanced level of manufacturing industry, which uses computer programming to achieve equipment operation, through the input of precise programming instructions, so that the machine can automatically carry out efficient processing. In the important programming stage, technicians must carefully control each link, from the planning of the tool path to the setting of cutting parameters, to achieve excellence. Technicians use advanced CAD/CAM software to carefully plan the tool path to ensure that every cut is accurate, which not only reduces the waste of materials, but also ensures the geometric accuracy of the mold at the source. Through the use of high-precision tools, the surface finish of the mold is greatly improved and the appearance quality of the product is optimized. Relevant data show that, at the same time, according to the characteristics of the mold material, the precise setting of cutting parameters, such as cutting speed, feed rate and cutting depth, effectively avoid overheating, vibration and other adverse factors, thus greatly improving the surface finish of the mold, so that its surface roughness is easily reduced to Ra0.4μm below. In addition, CNC machining technology is also known for its high efficiency. The automatic and continuous processing mode greatly shortens the production cycle of the mold, reduces manual intervention and improves the production stability. According to industry statistics, after the use of CNC machining technology, the production efficiency of the mold has generally increased by at least 20%, which not only means that enterprises can respond to market demand faster, but also greatly reduce production costs and enhance market competitiveness. CNC machining technology plays a vital role in optimizing the surface quality of mold processing, and its high-precision and high-efficiency characteristics provide a strong technical support for the transformation and upgrading of the mold manufacturing industry, and promote the entire manufacturing industry to a more intelligent and precise direction.
(2) Strictly control errors.
In the field of data processing, although programmed operation brings certain convenience, there are still many factors that affect the processing results in the manufacturing process of machine tools and tool spindles (see Table 1). The rotation of the spindle of the machine tool is an important part of it, and the performance will directly affect the stability and accuracy of the processing. As the hub of mechanical transmission, the operation of the spindle has a decisive impact on the accuracy of the workpiece position, especially the flatness of the workpiece. The appearance of workpiece processing error, in most cases, the spindle rotation axis and the center axis of the inconsistency, often due to the spindle in the use of wear caused by wear will reduce the accuracy of the bearing, thus affecting the quality of processing. In order to solve the problem, the machining personnel need to fine-tune the spindle assembly according to the specific requirements, and pay special attention to the daily maintenance and lubrication of the spindle to ensure that it is in good working condition for a long time, so as to ensure the machining accuracy of the workpiece.
Table 1. Influencing factors and solutions of machine tool spindle and tool accuracy
| Category | Machine tool spindle | Tool accuracy |
| Influencing factors | Spindle rotation performanceThe rotation axis of the main shaft is inconsistent with the central axisSpindle wear | force of friction |
| Influencing results | Processing stability and accuracyWorkpiece machining errorBearing fit accuracy is reduced | Machining errorReduction of tool accuracy |
| Solutions | Fine assembly adjustment spindlePay attention to the daily maintenance and lubrication of the spindle | Compare using templatesUse lubricants wisely to reduce friction |
(3) Adjust the production process.
There are some shortcomings in the application process of traditional mold production technology, such as high-risk operation, low efficiency, precision substandard, etc., which seriously restricts the quality improvement of mold products, and CNC machining technology integrating information technology provides feasible solutions for these problems, thus significantly improving the quality of products and services and customer satisfaction. In the optimization of the production process, CNC machining technology plays an important role, through the CNC equipment built-in computer network, enterprises can fine control of the work of various departments, effectively reduce security risks, and improve the stability of the entire production process. At the same time, the widespread use of CNC machining technology also accelerates the pace of information technology in mold production, relying on computer terminals, production personnel can immediately grasp every detail of mold production, thereby enhancing the stability of the production process.
(4) Improve production efficiency and processing accuracy.
The application of CNC machining technology in modern manufacturing industry is reflected in its significant contribution to improving production efficiency and processing accuracy. Through the pre-programmed computer control system, CNC machine tools can automatically and continuously complete a variety of complex processing tasks, thus greatly improving the production efficiency. Compared with traditional manual or semi-automatic machining methods, CNC machining not only reduces the interference of human factors, but also significantly improves the machining accuracy by precisely controlling the machining process. In the production line, the application of CNC machining technology has greatly shortened the manufacturing cycle of products and improved the production efficiency of enterprises. For example, in mold manufacturing, the CNC milling machine can quickly and accurately complete the milling of the mold according to the preset processing program, which greatly improves the manufacturing efficiency of the mold. At the same time, CNC machining technology can also achieve high-precision machining of complex surfaces, meeting the needs of modern manufacturing industry for high-precision and high-quality products.
(5) Automatic processing and reduce human intervention.
One of the core advantages of CNC machining technology is its high level of automation, which plays a pivotal role in modern manufacturing. Traditional processing methods often rely on the skills and experience of the operator, and the processing quality and efficiency are significantly affected by human factors. However, the application of CNC machining technology has completely changed this situation. Nc machining technology realizes the automation of machining process by controlling machine tool with pre-written program. This means that processing tasks can be carried out without human intervention, greatly reducing the impact of human factors on processing quality and efficiency. The machine can accurately execute each machining step according to the preset procedure, ensuring the stability and consistency of the machining process.
3 Closing remarks
All in all, with the progress of science and technology, the standards and requirements of the industrial manufacturing industry are also constantly improving. The wide application of CNC machining technology is precisely to cope with these new challenges, which can not only meet the high requirements of modern industrial manufacturing, but also further promote the technological upgrading and model innovation of the entire industrial manufacturing industry. Especially in the field of mold manufacturing, the combination of simulation technology and numerical control processing technology is gradually leading the manufacturing industry to develop in the direction of automation and centralization, and the technological innovation significantly enhances the safety of mold production, but also greatly improves the quality of mold products. This not only marks a breakthrough in mold manufacturing technology, but also brings long-term economic benefits and broad space for development.
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