The master of the automatic door plays a crucial role in determining the strategic decision-making process for key design factors, such as technical and economic indicators. When developing an overall design, several fundamental questions must be addressed: (1) Technical aspects: Manufacturing productivity, precision, strength and stiffness, reliability, service life, operational performance, safety, and environmental impact. (2) Economic considerations: Efficiency, cost-effectiveness, manufacturing and maintenance costs, size, and weight. (3) Aesthetic elements: Style, color, and how well it blends with its surroundings. As a general mechanical device with specific requirements, the design of an automatic door must adhere to the basic principles of mechanical engineering. These principles ensure that the system is functional, safe, and efficient while meeting industry standards. Key Design Considerations for Mechanical Components (1) Ensuring proper function and avoiding failure. A mechanical component fails when it can no longer perform its intended function. The effectiveness of these parts depends on material selection, working environment, and stress conditions. To maintain functionality, the design must meet basic requirements in terms of strength, stiffness, stability, friction, and temperature resistance. 1) Strength: Components that break or deform permanently during operation are considered weak. Failure due to insufficient strength can be either global (like gear root fracture) or surface-level (such as tooth deformation). To enhance strength, high-strength materials, larger cross-sections, and treatments like heat or chemical processing can be used. Most components operate under variable stress, making fatigue a major cause of failure. Stress concentration, surface quality, and environmental factors should be carefully considered during the design phase. 2) Stiffness: Deformation during operation must remain within acceptable limits. Excessive deformation can affect the performance of critical components like rotating doors, axles, and guide rails. Therefore, both overall stiffness and contact stiffness need to be calculated. Increasing section size, moment of inertia, or support area can improve stiffness. 3) Surface damage: This includes corrosion, wear, and contact fatigue. Over time, surfaces may deteriorate, leading to failure. To prevent this, use corrosion-resistant materials or apply protective coatings such as bluing, painting, or anodizing. 4) Environmental effects: Parts must operate under suitable conditions. For example, gears and bearings require lubrication, and extreme temperatures can reduce their load capacity. (2) Additional design requirements for mechanical parts: 1) Structural manufacturability: Good design ensures that parts can be produced efficiently and assembled easily. This involves considering the entire production process—from raw material to machining and assembly—while taking into account current manufacturing capabilities. 2) Economic efficiency: Simplifying part structures, using affordable materials, and utilizing standard components instead of custom ones helps reduce costs. A good design also considers ease of assembly and maintenance. 3) Reliability: A reliable part performs its function consistently over time under specified conditions. Since failures are often random, minimizing variability in performance and maintaining regular inspections can significantly improve reliability. JIANGMEN MOSCOT OPTOELECTRONIC TECHNOLOGY CO.,LTD. , https://www.sensorsled.com