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弧齿锥齿轮机械加工成形后的热处理变形,包括轮坯的变形(定位孔、支承端面、轴颈等变形)和齿圈的牙齿变形,都与齿轮的结构、齿坯金相组织和金属流线形状及热处理工艺参数的变化等因素有关。 一般弧齿锥齿轮热处理后的螺旋角及齿侧间隙减小,压力角也产生变化,将引起齿面接触区的变化,加大齿轮的运转噪音。 1,影响齿轮热处理变形的主要因素 1)齿轮的结构因素:齿轮外形太大太薄的环形被动齿轮,或又细又长的轴形主动齿轮,容易引起变形,热处理后的齿面容易呈现“游离状”的接触区,即与齿圈对称180°位置上的轮齿同侧齿面接触区不一致。
Spiral bevel gear machining deformation after heat treatment, including the deformation of the billet (positioning hole, bearing end face, journal deformation) and tooth ring gear deformation, with the gear structure, gear metallurgy and metal flow Line shape and heat treatment process parameters and other factors. Generally, the helical angle and the flank clearance after the heat treatment of the spiral bevel gear are reduced, and the pressure angle is also changed, which will cause the change of the contact area of the flank and increase the operation noise of the gear. 1, the main factors affecting the deformation of the gear heat treatment 1) the structural factors of the gear: the gear shape is too large and too thin ring passive gear, or thin and long shaft-shaped driving gear, easily lead to deformation, heat treatment of the tooth surface prone to “ Free ”contact area, that is, with the gear ring symmetry 180 ° position on the same tooth surface contact area is inconsistent.