Design And Study On Milling Drum Of Pavement Planer

As an important mechanical equipment of road surface repaired, pavement planer has been paid mach more attention in recent years. The milling drum is a key part of this machine. The design quality of the milling drum of pavement planer influences the working performance. In this thesis, the milling drum of the asphalt pavement planer is designed and studied. Then the design method of the milling drum is presented.In this thesis, the basic parameter of the milling drum is introduced. The selection scopes of three diameter of the milling drum is given based on the relation of the max thickness in one milling and the extension of tooth. The rational spiral angle is given by analyzing the relation of spiral angle and friction angle, real front cutting angle and spiral angle, rear cutting angle. In order to reduce abrasion of the tooth, make tooth rotate round the sleeve in the cutting, the tooth has a tilt angle of sideways after the installation. And Taking efficiency of loading into consideration, the selecting principle of spiral number is given.In this thesis, the tools configuration and cutting curve of the milling drum are studied. In the tools configuration, the arrangement pattern of square is demanded by analyzing the relation of the cutting curve and particle size. By analyzing the relation of tools configuration and cutting breakout effect, optimal line spacing for cutting tools of different arrangement pattern is determined full using of the cutting breakout effect. Through analyzing different tools configuration and cutting curve of the milling drum in the three kinds of speed, the rational tools configuration is selected based on demanding of working parameter. Then example is given to explain the method and process carried out of tools configuration of the milling drum.In this thesis, load fluctuation of the milling drum is studied. According to the stress model and formula of the single cutting tool, the computational method of load fluctuation is determined, and established optimized procedure of the tools configuration with the minimum load fluctuation as the objective function, reduced load fluctuation of the milling drum.In this thesis, the 3D model of milling cylinder is studied. Firstly, the various components of milling cylinder are designed using of UG software, and the specific size and position relations of various components are provided. Secondly, localization process of various components of milling cylinder is discussed, and the reasonable level structure and space orientation relations between various components are established. Thirdly, the assembly of various components is adjusted and model is designed using the assembly simulation module. Lastly, the overall geometry model of various components is established. Then the space position of various components is viewed directly.In this thesis, the research of the FEM of milling cylinder is conduct. The FEM model of milling cylinder is established by UG software, which is import Into ANSYS though PARA form. The allowable stress is judged whether at the scope by analyzing von stress cloud chart and the displacement cloud chart of the milling cylinder. And the easy damage position is found, which supply a method to solve the life problem of the milling cylinder.This research was supported by the Science and Technology Foundation of Education Department of Hunan Province (Grant No.: B B30317) "Design and Study on the Parameter of Milling Drum of Pavement Planer"...