Dissertation > Transportation > Road transport > Other road transport > Motorcycles, motorized bicycles

Research on Divided Flow Cold Extrusion Technology of Reverse Spiral Bevel Gear for Motorcycle

Author DuYong
Tutor FengWenJie
School Chongqing University of Technology
Course Mechanical Manufacturing and Automation
Keywords Spiral bevel gear Cold extrusion Numerical Simulation Mold Design Process Test
CLC U483
Type Master's thesis
Year 2010
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Spiral bevel gear with its superior transmission performance , widely used in cars , motorcycles and other mechanical systems in the three-dimensional transmission . Such parts by forging Gleason gear cutting machine cutting processing . Cold extrusion technology has the advantages of high production efficiency , saving raw materials , low cost , high strength parts and good surface quality has unique advantages , especially in high-volume production . If applied to spiral bevel gear tooth profile of the (near ) net shape processing , will have broad application prospects . Spiral bevel gear teeth appear before arc in the cold extrusion process , the metal flow difficulties forming a larger force ; molding of poor quality , mold life and low technical problems exist in the actual production . Therefore , the cold extrusion technology spiral bevel gear cutting with a certain degree of technical difficulty . This selection of the rigid-plastic finite element simulation software DEFORM-3D spiral bevel gear cold extrusion process numerical simulation analysis , drawn the parts metal flow during the forming process , as well as the law of stress and strain distribution ; blank diameter metal filling the performance impact ; contrast closed extrusion shunt extrusion and taken off the the punch squeeze three cold heading crowded composite forming process of forming force size ; shunt hole diameter of the forming force for shunt extrusion , optimized best diversion hole diameter . Also finishing hot forging - cold extrusion forming process , shows that shunt extrusion process than closed extrusion process of cold extrusion force is small . Based on theoretical analysis , based on existing equipment conditions to develop a technology test program , the development of a dedicated mold layer combination die and die -oriented cold extrusion process test to verify the theoretical analysis results .

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