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In order to research the ways of establishing holistic finite element model based on properties of joints, the vibration modal of a vertical machining center KVC1050N is analyzed using the software ANSYS and the equivalences principle of fixed, rolling and sliding joints are introduced, which are compared with the modal testing. The result shows that the FE analysis vibration modal based on characteristics...
This paper uses three-dimensional design software PRO/E to create the model of the sliding column, and then carries on static analysis and modal analysis for the sliding column, which includes the ribs or not, in the ANSYS software. The deformations, the vibration frequencies and the amplitudes of the sliding column model in two states are obtained. By comparison of these results in two states, the...
Stiffness is an important index of machining centers' performance. The stiffness of high-speed vertical machining centers named VH1100 is analyzed by finite element method. The finite element analysis model of the machining centers is built considering the linear stiffness of double linear guide rails and the axial stiffness of double ball screw and ball bearing. The deformation of the machining centers...
High Speed Cutting (HSC) is an advanced manufacturing process technology which develops rapidly in recent years. It is also an important orientation in machining technology. It has made significant economic benefits in aviation, aerospace, automotive, mold, high-speed locomotives and other industry applications. Therefore, far-reaching significance will be achieved in improving the level of processing...
The finite element dynamic analysis model of the spindle assembly was developed based on thermoelasticity and finite element method. The force and the thermal value of spindle were calculated. The static and dynamic characteristics were analyzed. The modal, frequency, stress and displacement were obtained. The influence of spindle structure and parameters on spindle dynamic characteristics was discussed,...
The structure of traditional machine tool is designed through experience, analogy, and static traditional design method. The machine structure was heavy and design cycle is long. So the cost is expensive. Therefore, there are a lot of places need improvements. The finite element model of the beam structure was structured by using three-dimensional CAD modeling software-UG NX4.0 and finite element...
Finite element model of crossbeam of GMCU2060 gantry machine center is proposed, the static and dynamic stiffness is analyzed by using finite element analysis. The weak link of the crossbeam is discovered and a modification scheme is put forward for the design of the crossbeam structure. The analysis shows that the maximum deformation of the improved crossbeam is decreased to 0.03 mm and the first...
Two side direction burrs is an important factor of influence to edge quality and performance of precision parts. A finite element model was developed for simulation of two side direction burr formation process. Based on strain distribution, a two side burr formation mechanism was proposed. Strain of Cutting lay material near the side face in two side direction of work piece is determinant factor of...
For the system of macro micro-feed table, deformed guide rail joints is designed using of flexible hinge. The 2D stiffness matrix is derived from principle of minimum potential. And the stiffness matrix is applied to micro-feed table which contains deformed guide rail joints. The simplifying computation model of the micro-feed table is obtained. The results of simplifying model are compared with finite...
According to the structure of beam components of bridge type five axis linkage gantry machining center model TH58, three-dimensional solid models were established and meshed by ANSYS software. Using component analysis from the model analysis theory, the finite element models were analysised on static force, vibration model and harmonic response analysis. As a result, beam components structure has...
To simulate the formation of the turning machining chip in a virtual environment, the curling reasons, breaking conditions and generating thickness of chip are discussed, and numerical simulation models are built according to formation mechanism of chip. The 3-D solid models of chip are given according to classification criterion of chip, furthermore, the effect of machining parameters on shape dimension...
Based on the elastic and plastic theory, Three-dimension milling Finite Element Method model is established in this thesis, which can be used in the machining deformation field analysis. This model simulates the process of material cutting off, which uses the technology of element die and birth. The machining deformation law is researched resulted by the release of residual stress in milling process...
Precision machining of components with tight tolerances requires not only to do a fine presetting of tools, but also to carry out on-line tool-path corrections in order to compensate the form deviations that arise in the workpiece derived from the action of cutting forces. Advanced and expensive technology, such as machine-tools equipped with multiple sensors, are commonly utilized for this purpose...
To design a machine tool successfully, its essential parts should be analyzed and evaluated after design but before prototype being made. The spindle assembly and headstock are the most essential parts of high speed machine tool, so how the dynamic characteristics of the spindle assembly affect the performance of NC machine tool are of great significance and should be studied. This paper's research...
Temperature is considered to be one of the most important aspects to take into account in dry hard machining. However, dry hard machining is a complex process, and the temperature is the most difficult to be measured when machining. Up to now, only very few studies have been reported on influence of tool wear and depth of cut on temperature fields produced during dry hard machining AISI D2 steel in...
The method of machining Al6061-T6 with large strain to produce nano-materials was introduced, and the influence of cutting parameters on the microstructure was studied. The shear strain of chip which is important to the microstructure was analyzed theoretically and simulated by finite element. Bright-field TEM images and SAD patterns were obtained and used to study the microstructure of the chip....
Machining distortion of monolithic component is one of the most striking problems that aircraft manufacturing has to face up to. A physics-based material removing process simulation in computer is approached to analyze and control machining distortion. The actual material removing process is simplified and modeled with equivalent chip of uniform thickness. With a single tool-tooth milling process...
The Analytic Hierarchy Process (AHP) can determine the weights of all assessment factors. The fuzzy-AHP comprehensive evaluation model is built in this paper to translate the multi-objective design problem into a single objective design problem. This paper takes the example for the column of XK717 CNC milling machine. The hierarchical structure is established and the weights of all assessment factors...
In order to study high-speed machining mechanism and optimize machining parameter, the technique coupling numerical simulation of high-speed machining process and case-based reasoning (CBR) is proposed. The process of high-speed machining auto panel dies is simulated with FEM and the most appropriate high-speed machining parameters are selected. A high-speed machining parameters database for auto...
Headstock is one of the most important parts in the high-speed NC center; it plays a great part in the working process of the NC center. This paper presents a method using ANSYS Workbench to analyze the Headstock, including modeling, applied load and post-process. In addition, it also refers to a comparison among different constraints to prove them as the important parts in the finite element analysis...
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