Analysis of flow process of carburized layer in gear manufacturer
Analysis of the flow process of the carburized layer of the gear manufacturer:
(1). Carburized gears require a carburized layer to be distributed on the tooth surface. When the "carburized-warm extrusion" process is used, the distribution of the carburized layer is closely related to the deformation mode of gear forming. For the tangential split extrusion process, the carburized layer at the gear teeth is redistributed from the carburized layer on the surface of the cylindrical billet. In the process of "carburizing-warm extrusion" of gears, the deformation time is short, and the diffusion effect of the infiltrated layer can be ignored. Obviously, after the cylinder becomes a gear, the surface area is greatly increased, and the thickness of the carburized layer is greatly changed. When the carburized layer is subjected to tangential compression during the forming process, the thickness of the carburized layer increases, and vice versa, the thickness decreases; and the carburized layer The thickness change is determined by the amount of tangential deformation. Therefore, the tangential deformation of the carburized layer can be controlled in the process of warm extrusion of the gear, and the distribution of the thickness of the carburized layer can be controlled.
(2). On the basis of understanding the forming process of gear teeth, further discuss the change from the cylindrical carburized layer to the gear carburized layer when forming the gear teeth part: the surface of the cylindrical body pressed by the die teeth is carburized The change of the carburized layer that becomes the tooth root part of the gear must be the expansion of the surface of the cylinder into the surface of the tooth root, and the earlier the deformation is involved, the greater the elongation rate, the thinner the carburized layer; on the contrary, due to the extrusion of the concave die. When the pressure part is concave and becomes the root of the tooth, the metal in the pressed part of the metal between the die teeth flows radially to become the tooth top part, and this part of the metal is compressed by the two adjacent die shunting teeth at the top of the die. The thickness increases; when the deformation increases, if the contact with the die is sufficiently rubbed by the die, the thickness of the carburized layer may be reduced when stretching occurs.
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