Scraping blade: adopts“ Negative front angle+arc transition; Design (Front Corner -5° ~-10° ）To avoid the occurrence of chipping during cutting, while controlling the chip thickness (0.02-0.1mm) to ensure that the chips are in the form of fragments rather than long strips, to prevent clogging.
Material selection: WC Co hard alloy (YG8) is used for processing ordinary steel, and ultra-fine grain hard alloy (YT15) is used for processing stainless steel, combined with AlTiN coating (hardness≥ 3200HV), which improves wear resistance by 40%.
Rolling wheel: mostly arranged symmetrically with two or three wheels (angle 120°); Distribution), the wheel surface is of micro arc type (curvature radius 5-10mm), passing through“ Line contact” But not '; Point contact” Uniformly transmit rolling pressure (50-300MPa) to create a plastic deformation layer (depth 0.05-0.2mm) on the metal wall of the hole, and increase the surface hardness by 15% -30%.
Wheel diameter design: Rolling wheel diameter=nominal tool diameter+0.03-0.05mm (interference fit) to ensure sufficient cold work hardening effect.
Guidance System: Front end“ Pre guided block” (5-8mm away from the scraping blade)+rear end“ Fine Guidance Block” (10-15mm away from the rolling wheel), the dual guide design controls the straightness within 0.01mm/m, far exceeding the single guide structure.