CNC (Computer Numerical Control) machining is a technique of precision machining by controlling machine tools through a computer program. It has a significant impact on product quality and accuracy, which will be discussed in detail below.

First of all, the impact of CNC machining on product quality is mainly reflected in the following aspects:

1. Consistency and stability: CNC machining can ensure the consistency of products between batches. Because it is controlled by a computer program, CNC machining can ensure that each product meets the same design specifications, thus improving product consistency and stability.

2. Accuracy and size control: CNC machining allows for high precision machining so that the size and shape of the product can meet the design requirements. This is especially important for industries that require high precision (e.g. aerospace, medical devices, etc.).

3. Surface quality: CNC machining enables high quality surface machining, including control of finish and surface roughness. This is very important for products that require high surface quality (e.g., automotive parts, optical components, etc.).

Secondly, the impact of CNC machining on product accuracy is mainly reflected in the following aspects:

1. Complex parts processing: CNC machining can realize the processing of complex parts, including curves, surfaces, spirals and other complex shapes. This greatly improves the product design freedom and manufacturing flexibility.

2. Degree of automation: CNC machining is an automated machining technology, which can realize automated production and reduce the influence of human factors on product accuracy. This helps to improve the accuracy and stability of the product.

3. Cost savings: CNC machining reduces manual labor, improves productivity and reduces production costs. This makes it easier for companies to invest in equipment and technology that improves product accuracy.

Overall, CNC machining has a huge impact on product quality and accuracy. It ensures consistency, stability and high-quality surface finishes while increasing product accuracy and manufacturing flexibility. This makes CNC machining an essential and important technology in modern manufacturing.