With the rapid development of the new energy vehicle industry, the requirements for lightweight, high performance and safety of the whole vehicle are getting higher and higher. Among them, the chassis and suspension system, as the core structure of the vehicle, directly affect the driving stability, handling performance and ride comfort. Therefore, CNC (computer numerical control) precision machining technology plays a vital role in the manufacture of these key components. This article will analyze in detail the CNC precision machining technology and advantages of the chassis and suspension system of new energy vehicles.
1. Key components of chassis and suspension system
The chassis and suspension system of new energy vehicles are mainly composed of the following core components:
Chassis structural parts: including subframes, crossbeams, longitudinal beams, control arm brackets, etc., which are mainly responsible for supporting the body and power system.
Suspension system parts: such as control arms, swing arms, steering knuckles, ball heads, etc., are responsible for connecting the wheels and the body and providing shock absorption functions.
Electric drive related brackets: The motors, reducers, battery packs, etc. of new energy vehicles require reliable chassis support structures to ensure stability and safety.
These parts are usually made of aluminum alloy, high-strength steel or composite materials. They are required to have high rigidity and reduce weight as much as possible to improve the vehicle's endurance and handling performance. Therefore, CNC precision machining technology has become an important means of producing these key components.
2. Application of CNC precision machining in chassis and suspension system manufacturing
(1) Five-axis CNC machining improves the precision of complex parts
Many parts in the chassis and suspension systems of new energy vehicles have complex shapes, such as steering knuckles, control arms, etc. They usually have multi-angle and multi-curved surface structures. Traditional three-axis CNC machine tools are difficult to complete precision machining in one go, while five-axis CNC machining centers can use the linkage of two rotating axes to enable the tool to cut the workpiece at the best angle, greatly improving machining accuracy, reducing repeated clamping errors, and improving production efficiency.
(2) High-precision CNC milling and turning technology
CNC milling: used to process chassis connectors, brackets, control arms and other parts to ensure that their dimensional accuracy meets assembly requirements.
CNC turning: used to process cylindrical parts such as ball heads and bushings to ensure their concentricity and surface finish to improve wear resistance and service life.
(3) Precision drilling and tapping process
The components of the chassis and suspension system require multiple high-precision threaded holes and positioning holes to ensure that the parts can be accurately matched during assembly. The CNC drilling and tapping process can ensure the consistency of the size of each hole through program control, avoid human errors, and improve assembly accuracy.
(4) Deburring and precision polishing process
The parts of the chassis and suspension system are prone to burrs during the processing process. If they are not removed, it may affect the assembly and service life of the parts. Automatic deburring after CNC processing can ensure smooth edges and avoid assembly problems caused by sharp burrs. At the same time, precision polishing can improve the surface quality of parts and reduce friction and wear.
3. Advantages of CNC precision machining technology
(1) High precision and consistency
CNC machine tools use computer numerical control systems, which can accurately control the movement trajectory of the tool, ensure that the dimensional accuracy of each part reaches the micron level, and at the same time ensure the consistency of mass production, so that the assembly error of each chassis and suspension part is minimized.
(2) Improve material utilization and reduce production costs
The chassis and suspension systems of new energy vehicles usually use lightweight materials such as aluminum alloy, and CNC machining can reduce material waste and improve material utilization by optimizing cutting paths. In addition, automated CNC production can reduce manual intervention and reduce production costs.
(3) Suitable for small-batch customized production
The development of the new energy vehicle industry is moving towards personalization and customization. For example, the chassis design of different models may be different. CNC precision machining can quickly adjust the production process by changing the CNC program, making small-batch production more economical and efficient to meet the needs of different models.
(4) Improve the reliability and durability of parts
High-precision CNC machining technology can ensure the structural stability of parts, reduce internal stress concentration, improve fatigue resistance, and enhance the durability of chassis and suspension systems, thereby improving the safety performance of the entire vehicle.
Conclusion
The chassis and suspension systems of new energy vehicles play a decisive role in the performance of the entire vehicle, and CNC precision machining technology has become the core technology for manufacturing these key components with its high precision, high efficiency and high flexibility. With the continuous advancement of technology, CNC machining will further promote the lightweight and intelligent development of chassis and suspension systems of new energy vehicles, and provide higher quality manufacturing solutions for the new energy vehicle industry.
