En modernos equipos industriales de alta gama., desde husillos de máquinas herramienta de precisión hasta articulaciones de robots industriales de seis ejes y sistemas de control de actitud aeroespacial, rodamientos de rodillos cruzados (CRB) destacan por su alta capacidad de carga, estructura compacta, y precisión rotacional excepcional. Estos rodamientos son los componentes principales que permiten un control de movimiento de alto rendimiento..
Behind these superior performances lies a highly precise and complex manufacturing process. This article provides engineers and procurement professionals with a comprehensive overview of the full CRB manufacturing chain and key technical highlights.
Crossed Roller Bearing Production Process
1. Foundation: Material Selection and Pre-Treatment
The reliability of high-performance bearings starts with material selection. CRBs typically use high-carbon chromium bearing steel (p.ej., GCr15/52100) or high-performance alloy steels.
Material purity and grain structure: Fine and uniform grains, free of inclusions and micro-cracks, are critical for corrosion resistance and fatigue life.
Pre-treatment processes: Recocido, homogenization, spectral analysis, and ultrasonic inspection ensure defect-free steel, providing a stable foundation for micro-level precision machining.
2. Micro-Level Machining: Precision of Rollers and Raceways
The rotational accuracy of a CRB relies on the precise geometry of rollers and raceways.
Roller precision machining: Ultra-precision grinding and polishing, combined with laser inline measurement systems, ensure roller dimensional deviations are controlled within micron or sub-micron levels.
Raceway machining: Inner and outer raceways undergo multiple grinding and honing/polishing processes on CNC grinders to guarantee roundness and contact angle precision, ensuring uniform load distribution and high motion rigidity.
3. Strengthening Performance: Heat Treatment and Surface Engineering
The hardness, tenacidad, and wear resistance of bearing components are achieved through heat treatment and surface engineering.
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