The application of CNC machining technology in automobile manufacturing industry

The application of CNC machining technology in automobile manufacturing industry

With the continuous improvement of China's economic development speed, the current intelligent manufacturing technology has become an important part of economic development, high-end, high-precision CNC machine tools have also begun to enter the production workshop of automobile manufacturing enterprises. In the automobile manufacturing industry, CNC machining is an important technology, and its most prominent feature is digitalization, automation and intelligence, which can bring higher economic benefits to modern automobile manufacturing enterprises. At present, while the development of intelligent manufacturing technology in China continues to grow, people have put forward higher and higher requirements for the quality and function of automotive products, so modern machinery manufacturing must be more precise and multi-functional. The application of CNC machining technology to the automobile manufacturing industry can better meet the market needs and greatly improve the efficiency of automobile manufacturing. At the same time, the application of numerical control machining technology in the automobile manufacturing process can realize the unification of numerical control machine tool technology and numerical control programming technology, so as to play a greater overall effect and promote the stable development of automobile manufacturing enterprises.

1. Application advantages of CNC machining technology in automobile manufacturing industry

1.1 Reduce car manufacturing time

In the automobile manufacturing process, technicians can integrate relevant information from all aspects with the help of numerical control processing technology, arrange and coordinate the automobile manufacturing process and equipment in a unified way, and standardize the entire process of technology application in text to integrate human resources and production information. To achieve further optimization of the production accuracy of each process in automobile manufacturing. At this stage, the numerical control processing technology in the domestic automobile manufacturing industry has been at a relatively high level, overall technological innovation, numerical control efficiency is relatively high, can improve the actual production efficiency. Especially for the processing of some parts, technicians need to have strong operational skills, and apply numerical control processing technology to ensure the details of parts, and use intelligent operation methods to improve the overall production efficiency of parts.

1.2 Reduce labor intensity

The application of CNC machining technology in the automobile manufacturing industry can reduce the equipment processing time in the entire automobile production process, make the processing work more reasonable, and help to improve the intelligent level of workshop equipment operation. Based on this, it can also reduce labor production costs, simplify production management, and optimize workshop personnel management to reduce enterprise management and production costs. In addition, in the traditional machinery manufacturing production line, many positions of processing work need technical personnel to complete, such as loading, unloading, tool change, clamping positioning and so on. Emerging technologies, such as digital control technology, hydraulic technology and sensor technology, have brought great changes to modern industry and realized the modernization of manufacturing processes, which can not only reduce the time required for processing processes, but also reduce the labor intensity of workers and create more economic benefits for enterprises.

1.3 Improve the overall quality of automobile manufacturing products

The process in the traditional automobile manufacturing process has the characteristics of repetition, especially in the manufacturing stage of large molds, it is difficult to improve product quality only by manual operation, which will not only affect the overall production pass rate, but also seriously affect the normal and efficient production of enterprises. The application of CNC machining technology to the automobile manufacturing process can use computer programming technology, CNC technology, etc., to each process and the overall processing process for strict and standardized control, under the support of electronic software, automotive product manufacturing accuracy can be effectively improved. The mold produced in this way can meet the technical requirements of the original design drawings. At the same time, the use of CNC machining technology and equipment can improve the efficiency of automobile manufacturing and ensure the quality of products under the support of a highly standardized model, thus promoting the high-quality development of the automobile manufacturing industry.

2. The specific application of CNC machining technology in automobile manufacturing industry

2.1 Application in auto parts processing

Under the background of the new era, with the continuous improvement of people's living standards, the application of automobiles in daily life is more and more extensive, but at the same time, automobile manufacturing enterprises have higher and higher requirements for vehicle performance. Compared with traditional machining technology, CNC machining technology has the advantages of high precision and fast speed, and has been more widely used in vehicle manufacturing, which greatly improves the degree of automation of automobile manufacturing. And with the continuous progress of CNC machining technology, many auto parts manufacturers began to use automatic production lines, so as to achieve automated manufacturing. In addition, when processing auto parts, it should be ensured that CNC machining technology has strong scalability to meet the requirements of various parts sizes. In order to achieve mass production, an efficient computer operating system can usually be used, and only one set of control software can complete the control of the corresponding manufacturing system in actual operation. For automobile manufacturers, how to expand production scale and increase profits has always been a problem worth pondering. Numerical control machining technology has a certain storage function, in the application process does not need to consider each data loading process, do not need to repeatedly execute commands, has become the first choice for some auto parts manufacturers. In the early days of automobile manufacturing, in order to achieve large-scale and efficient production, some auto parts manufacturers have weakened the requirements for the shape, structure and model of parts in the production process. With the continuous progress of the automotive industry, its production objectives have undergone a great change, which puts forward higher requirements for the response speed of the production line and environmental adaptability, and the traditional mass production mode is no longer suitable for the production of automotive parts. In the context of new industry development, it is necessary to apply CNC machining technology to the manufacturing process of auto parts, such as the application of CNC machine tools to replace the traditional automatic production line, so as to achieve the flexible automatic production of multi-variety and small-batch auto parts. At the same time, the organic combination of CNC system and mechanical equipment can quickly adjust the parts manufacturing process to ensure the performance of parts and realize the efficient production of auto parts products without too much manual intervention. Taking the automobile engine cylinder block as an example, the cylinder block can be roughed by casting method first, then the "three holes and four sides" are milling with CNC machine tools, and finally the cylinder block is finished with CNC machine tools. In the manufacturing of automobile transmission, using CNC machine tools instead of the traditional hobbing, gear shaper, shaving and other processes can greatly improve the processing efficiency and accuracy.

2.2 Application in automotive machinery mold processing

2.2.1 CNC EDM

The application of NC EDM technology in the machining of automotive machinery mould can improve the manufacturing quality of automotive machinery mould. Therefore, automobile manufacturing enterprises should reasonably apply this technology, improve the level of CNC machining, and carry out special treatment of a certain material and determine its processing method. At the same time, the process parameters can be adjusted periodically, so as to achieve the determination of process parameters and process cycle. For some specific NC EDM processes, technicians can use the energy treatment method suitable for metal etching process to develop a treatment scheme with rust prevention, so as to effectively ensure the actual pulse. In addition, in the machining of automotive mechanical die, the influencing factors of CNC EDM process should be strictly controlled, based on the fluctuation trend of spark energy during the average current interval, and for the loss of speed and energy during the machining process, it can also be analyzed by factors such as the roughness of the surface of the mechanical die.

2.2.2 CNC lathe processing

In CNC lathe machining, in order to avoid the machining deviation caused by the tool, it is necessary to make a reasonable choice of the tool. Usually, the error of the workpiece is 10% to 15%. Therefore, the tool quality and grinding amount must be comprehensively analyzed according to various factors such as raw material characteristics, parts characteristics, processing conditions, etc., so that it can adapt to different processing conditions, and then improve the accuracy of the processing process. At the same time, the selected cutting tools should not only have high hardness, but also have better wear resistance, impact resistance and other characteristics. In the specific CNC lathe processing process, but also according to the process requirements to carry out the design of modeling, parts of the inner cavity, and control the processing quality. At the same time, attention should be paid to maintaining the consistency of each process benchmark, so that the position of the measured parts is accurate, and the hole in the processing process is used as the basis for the design of the positioning hole to improve the machining quality of the CNC lathe. In addition, the key to CNC lathe processing is to ensure that the tool's motion trajectory is accurate through the management of the application, so as to better meet the market needs. The finished workpiece can be used as a reference, and the 3D model of the machined component is constructed by computer software, and its process parameters are displayed in digital form. In the programming process, it is necessary to strictly control the quality of the materials used in CNC lathe processing, and pay attention to the management of the tool shape and strengthen the monitoring of the production process, so as to create favorable technical conditions for the smooth implementation of CNC lathe processing.

2.3 Application of CNC machining technology in automobile chassis manufacturing

The chassis is an important bearing structure in the car, which can withstand the quality of the body and the driver and passenger, ensure the stability and safety of the vehicle operation, and the performance of its manufacturing technology directly affects the quality of the entire vehicle. In the new era, there are more and more types of cars, and people have put forward higher requirements for the production and processing of cars. Therefore, in the chassis manufacturing, only for the specific circumstances of different types of vehicles to choose the appropriate CNC machining technology, in order to ensure the structure and modeling of the scientific. In the traditional automobile chassis processing process, mechanical stamping machine, rocker drill, die, press and other equipment are usually used, but in actual production, these equipment also has some shortcomings. Among them, the mechanical stamping machine not only has high investment cost, but also has a long manufacturing time, which is more suitable for the chassis manufacturing of old models; Because of its relatively low precision, the scribing method in the rocker arm drill requires a large number of workers to participate, so it is more suitable for the production of small car chassis. At this stage, we can build CNC machining center and CNC punching production line based on CNC machining technology, use photoelectric technology and vibration control technology to build CNC punching production line, and reasonably control the production process according to the production demand, and then implement the process of material placement, longitudinal beam loading, location determination, and use filter punch to send the longitudinal beam to the cutting position to achieve orderly cutting. Stamping is completed by automatic feeding device. This method can not only realize the directional adjustment of the plate, but also realize the automatic production of the equipment. In addition, the application of CNC machining technology in the manufacturing of automobile chassis can replace manual welding with mechanical arms, so that welding robots can complete each welding step, which can not only reduce the manual workload, but also greatly improve production efficiency and avoid over-welding, missing welding and other problems caused by human factors. For example, welding robots can be introduced to automate the welding of various models using the MIG welding process. At present, many automobile manufacturing enterprises have a relatively perfect automobile chassis CNC machining center, which can realize a variety of processing operations such as clamping processing, efficient feed of chassis parts, compared with traditional processing equipment, the processing speed can be increased by 5 to 10 times, and can effectively control the processing accuracy of chassis parts, thereby greatly improving the manufacturing quality of automobile chassis.

3 Closing remarks

This paper analyzes the application advantages of CNC machining technology in the automobile manufacturing industry, discusses the specific application of CNC machining technology in the automobile manufacturing industry, including parts processing, automotive machinery mold processing and chassis manufacturing, so as to better promote the development of automobile manufacturing work. The application of CNC machining technology in the automobile manufacturing industry can greatly improve the quality and accuracy of automobile manufacturing, but also reduce labor and production costs, thus creating more economic benefits for enterprises. Therefore, in the process of automobile manufacturing, automobile manufacturing enterprises should pay attention to the application of CNC machining technology, choose the appropriate CNC machining technology in different processes of automobile manufacturing, and operate in accordance with its production process to maximize the efficiency of automobile production and promote the healthy and stable development of automobile manufacturing industry.

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