Research On Welding Deformation Numerical Simulation Of Equal-Height Spiral Bevel Gear Milling Cutter

Equal-height spiral bevel gear as the upmarke transmission gear is widely applied in industry,but the manufacturing technology of equal-height bevel gear has been monopolized abroad,so it is hard to touch the core technology of manufacture in China.The manufacture of equal-height spiral bevel gear milling cutter,as the most important processing technology of equal-height spiral bevel gear has been an important research object in China.At present,the domestic cutter manufacturing process is unable to complete the processing of integral cutter.Generally,the two body welding is commonly used.That is the welding of the cutter body and the outer ring.The quality of the welding directly affects the quality of the cutter head.Therefore,the welding technology for the cutter head is urgently needed to be studied.In order to reduce the micro deformation of the tool slot,the laser welding with smaller welding deformation is often adopted during welding.Although the deformation of laser welding is much smaller than other welding methods,but the accuracy of cutter groove is relatively high,and such a small deformation is still difficult to meet the accuracy requirement of tool slot.Therefore,the numerical simulation method is used to simulate the tool plate welding process,and then the experimental analysis and other means are used to study the deformation of the disc welding.This topic comes from the horizontal topic "Cutting mechanism and design and development of precision complex cutting tools",the main contents of the research are as follows:First of all,this paper makes a plan for the contents of numerical simulation of the welding distortion of equal-height spiral bevel gear milling cutter and establishes the geometric model of the cutter according to the relevant parameters.Secondly,the corresponding mathematical model is established according to the physical model of the heat source.Compared with the welding of the heat source model and the cutter plate,the formation process of the molten pool is analyzed and the rationality of the heat source model is tested.Different welding parameters are used as boundary conditions for numerical simulation of the cutter head,and the welding temperature and deformation fields are analyzed,and effective simulation parameters are optimized in the range of reasonable deformation.Again,the welding parameters obtained by numerical simulation method are used to weld the main body and outer ring of the cutter head.Then,the mechanical properties of the cutter head are checked.The deformation is detected,and the experimental data are analyzed.The rationality of numerical simulation is verified.Finally,the accuracy of the numerical simulation is further verified by detecting the precision of the cutter and testing the machined gear.The welding parameters,obtained from numerical simulation,are applied to the welding experiment,and the rationality of numerical simulation of cutter head welding is verified by testing the cutter and gear.Based on the above research,a manufacturing method suitable for the contour bevel gear milling cutter with equal height is provided,which provides a reference for the machining of the later equal-height bevel gear milling cutter.