CNC machining centers usually use a solid body structure and a high-precision guide rail system to ensure that deformation is minimized during the machining process. The following are some factors that cause CNC machining centers to be less susceptible to deformation:

1. Machine tool structure design: CNC machining centers usually adopt stable cast iron or steel structures with high strength and stability. This structural design can provide good rigidity and stability when the machine tool is running, reducing the possibility of deformation.

2. High-precision guide rail system: CNC machining centers use high-precision ball screws and linear guide systems. These CNC machining center systems have high rigidity and repeatable positioning accuracy, and can reduce vibration and deformation during the processing process.

3. Temperature control: Some CNC machining centers are equipped with temperature control systems, which can control the temperature of the machine tool during the machining process and reduce the impact of thermal deformation on machining accuracy.

4. Processing parameter optimization: By optimizing processing parameters, such as cutting speed, feed speed and cutting depth, CNC machining centers can reduce the heat and cutting force generated during processing, thereby reducing the possibility of machine tool deformation.

5. Stable working environment: Keeping the working environment around the CNC machining center stable, such as temperature, humidity and vibration, can reduce the impact of external factors on the machine tool, thereby reducing the risk of deformation.

Although advancements in the design and technology of CNC machining centers have made them less susceptible to deformation during processing, reasonable use and regular maintenance are still required to ensure continued and stable performance and accuracy.