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Straight bevel gear vibration Orbital Forming Technology

Author: SuHongTao
Tutor: CaiGaiPin
School: Jiangxi University of Technology
Course: Mechanical Manufacturing and Automation
Keywords: Straight bevel gear Plastic forming Vibration Rotary Forging Rigid Plastic Finite Element
CLC: TG306
Type: Master's thesis
Year: 2010
Downloads: 74
Quote: 0
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Abstract


Rotary forging a partial pressure of continuous plastic forming technology. However, rotary forging is integrally formed on the workpiece through the successive partial load leaving the workpiece easily lead to non-uniform deformation of the workpiece during the forming process and forming process defect Although relatively conventional effort workpiece surface quality and good forging process has significant advantages; , for example, produce pulley-shaped or mushroom-shaped upper and lower scrap. In order to overcome this drawback, in the rotary forging mold - on the workpiece system add longitudinal harmonic vibration, i.e. vibration rotary forging; the deformation resistance of the workpiece in the forming process of vibration is reduced, and the whole of the workpiece forming more uniform, so as to avoid generating process waste, while higher forming quality. Therefore, the vibration of rotary forging technology has broad application prospects. Using a combination of theoretical analysis and computer simulations of straight bevel gear vibration rotary forging forming process research, mainly to complete the following tasks: (1) on the basis of the analysis of vibration rotary forging forming principle, the swing movement trajectory on the workpiece by the force of the impact and the factors that affect the quality of the workpiece forming. (2) the use of space geometry, analytical equations of the principle of the formation of the surface by the bevel gear tooth profile deduced the the spherical involute and other gear structure curve, PRO / E software environment to establish a precise spherical involute straight bevel parametric model of the gear; provide a basis for this type of gear design and finite element simulation. (3) The combination of the rigid-plastic finite element theory, through the establishment of the physical model and design simulation program, using the finite element software DEFORM-3D computer simulation of straight bevel gear forming process; Rolling forming compared with ordinary swing gear blank with vibration rotary forging forming, the deformation resistance is reduced to improve the quality of forming. (4) different modal parameters to match the lower gear forming process simulation, reveal the impact of the forming process; must be a reasonable choice modal parameters to get better quality of forming. (5) the value of the life of the mold and vibration Orbital process parameters are closely related to the mold position fatigue breakage occurs primarily in the tooth tip and tooth root. By more than this thesis provide an effective means of high-precision forming of straight bevel gear, a better value.

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Metal pressure processing > General issues > Pressure processing
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