To ensure the surface quality and appearance requirements of mechanical parts, several key measures should be implemented.

Firstly, precise machining processes and advanced equipment are essential. Utilizing modern techniques like CNC machining can provide high accuracy and smooth surfaces.

Secondly, proper selection of materials is crucial. Materials with good mechanical properties and surface finish capabilities contribute to superior surface quality.

Regular inspection during the manufacturing process is necessary. This helps detect any defects or deviations promptly and take corrective actions.

Appropriate surface treatment methods, such as polishing, coating, or anodizing, can enhance the appearance and protect the surface from corrosion and wear.

Moreover, strict quality control standards and operator training ensure that each step is carried out accurately and consistently.

In conclusion, a combination of advanced technology, quality materials, vigilant inspection, and skilled operators is needed to guarantee the surface quality and appearance of mechanical parts.