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JUNHUAN_SlewingBearing :

Slewing bearing, also known as slewing ring bearing, is a core structural component widely used in construction machinery, wind power equipment, marine engineering and intelligent automation equipment, which bears axial force, radial force and overturning moment simultaneously. The turning machining process is the key procedure to ensure the dimensional accuracy, surface finish and assembly performance of slewing bearings. Strict standardized turning processing can effectively eliminate forging defects, control machining tolerance, and improve the running stability and service life of the bearing. Main Machining Procedures 1. Blank Preparation and Inspection Before turning operation, conduct comprehensive inspection on the forged or cast slewing bearing blank, including appearance defect detection, hardness test and dimensional preliminary verification. Remove burrs, oxide scales and surface impurities on the blank surface to ensure the blank meets the pre-machining standard, and avoid abnormal tool wear and machining errors caused by blank defects. 2. Rough Turning Processing Adopt high-efficiency CNC lathes for rough turning of the inner and outer rings, end faces and raceways of the slewing bearing. The main purpose is to remove most of the machining allowance, quickly shape the bearing base structure, and reserve uniform finishing allowance for subsequent finish turning. In this process, reasonable cutting speed, feed rate and cutting depth are matched to reduce machining stress and avoid blank deformation. 3. Stress Relief Treatment After rough turning, perform stress relief annealing treatment on the workpiece to eliminate the internal mechanical stress generated during forging and rough machining. This step effectively prevents dimensional deformation and precision attenuation of the slewing bearing in the subsequent finishing process and long-term service process, ensuring the structural stability of the bearing. 4. Finish Turning Processing Carry out precision finish turning based on the reserved allowance, focusing on the finishing of bearing raceways, mounting end faces, inner and outer circle matching surfaces and bolt holes. Strictly control the geo