Papers by Keyword: Machining Simulation

Abstract: This paper examines whether the Coupled Eulerian-Lagrangian formulation, combined with a thought-out 3D geometry, used recently in turning processes, can provide accurate simulation results. Oblique cutting cases were analyzed with the aid of commercial software for Finite Element analysis. An evaluation of the simulation results was performed by comparing the cutting forces and temperatures of the simulation with experimental turning results. Overall, simulation results with good correlation with experimental data were observed for cutting forces, including axial force distribution and temperature prediction, showing that this approach can be used in turning simulations, regardless of cutting conditions involved.

Abstract: Machining simulation is an important procedure to ensure machining safety and efficiency, especially for five-axis machining. The modelling for Fidia HS664RT five-axis machining center is firt established, and then the tool path for five-axis machining of centrifugal impeller is generated based on NX. The machining simulation is then implimented based on Vericut, and finally the actual machining is realized on Fidia HS664RT five-axis machining center. The machining results indicate the validity of the proposed machining simulation method.

Abstract: The machine tool machining is a major processing method in manufacturing industry. Achieved the simulation for the machining process will greatly improved the processing efficiency, perfected the processing quality and reduced the production costs. It has important significance for the development of modern manufacturing industry. This paper studied the constitute of the processing verification and simulation systems. And focuses on the principle of the machine tool system driven by the common simulation engine and driven by the virtual NC controller. Finally, the simulation system was built and use the blade machining as an example to the simulation test and verify.

Abstract: This paper first analyzes the NC simulation and NC machining process of curve bevel gear, and provides the basic equations and the formulae in detail based on the CNC 3 axis linkage machine tool cutting. Directly to takes the rotation angle of the work gear as machine tool motion parameters, the axes of other motion work piece express the gear angle function. Finally, according to the characteristics of curve bevel gear, we select reasonable processing technology, setting processing parameter of curve bevel gear, then test the tool path simulation and program processing, and finally the use of CNC milling machine with three linkage process curve bevel gear.

Abstract: In order to fit the intelligent development of NC programming system, through in-depth study to master the internal structure and structural principle of NC turning center, this paper developed the innovative NC programming model using common G-code based on its original MAZATROL conversational programming capabilities, and further implements the G-code programming model embedded into its specified MAZATROL conversational programming model, which not only can reflect the versatility of the common G-code programming model, but also can bring into play simple and easy maneuverability of MAZATROL programming model; Finally, by running NC program to perform the trial turning test on NC turning center, the test results verify that the nested NC programming model developed by this paper can effectively solve the tedious and error-prone manual NC programming problem, which greatly reduces the programming and debugging time, improves utilization of NC machine tools, and ultimately has brought significant economic benefits. Therefore, the research results of the paper will provide a simple and effective and practical way to improve the programming efficiency, and have important application value to further enhance the programming intuitive research of NC turning center.

Abstract: NC machining simulation, as one of the key technology in the field of CAD/CAM, can effectively check out the interference collisions that may occur in the machining process, significantly improve the safety usage of NC machine tools, has important practical significance to prevent the occurrence of machine accidents. Based on the integrated simulation module of UG NX software, this paper established the simulation model of NC turning center and elaborated the establishing process of machining simulation system, including the creation and verification of tool path, the digital model assembly, machine driver and motion model and so on. So tool path simulation and processing simulation were achieved, and the phenomenon of over-cutting and under-cutting between the parts and the cutting tool can be discovered timely. Meanwhile, on the basis of UG/Post module, the special postprocessor for NC turning center was developed to automatically output NC program, and the generated NC program can directly enter the NC machine tool for processing without manual modification, which will improve the efficiency and quality of automatic programming of machine tools, thereby shortening production cycle and reducing processing costs. Finally, the product processing examples verify the correctness and practicability of the special post-processor and process simulation system.

Abstract: In order to solve the hobbing machining data calculation and hobbing simulation of non-circular gear with various shapes, the piecewise cubic spline fit method has been adopted to unify the polar coordinate expression of non-circular pitch curve. The method to generate hobbing machining data was deduced based on hobbing linkage mathematical model, and the machining data error caused by piecewise cubic spline fitting method was analyzed. The three-dimension software has been used as simulation tool to make secondary development, and then non-circular gear hobbing simulation was realized based on machining data, which can verify the validity of machining data and the relevant design drawbacks of non-circular gear. The work of this paper lay a good foundation for design parameters optimization and hobbing of non-circular gear.

Abstract: Complex cavity generally is machined in 3 axis or 3+2 axis machine tools, it has large amount of metal to be removed. For complex cavity machining, the cutting speed of ball end mill`s head point is zero, which makes its end milling ability poor; Torus cutter `s flat bottom width is wide, which causes curvature interference and concave-uncut. So this article designs a new kind of cutter for complex cavity roughing and semi-finishing, which can improve ball end mill`s poor end milling ability and decrease flat-end width. The simulation results show that the new cutter`s feasibility of machining complex cavity is better, and it can obviously reduce the amount of owe cutting compared with the torus cutter; At the same time, the new cutter can improve machining efficiency by 32.4% compared with the ball end mill, and good surface can also be generated.

Abstract: Based on the traditional cradle-type epicycloids bevel gear machining theory, the mathematical model of the epicycloids spiral bevel gear machining is created. Then, by applying coordinate transformation from the cradle-type machine to a CNC one, a six-axis virtual CNC machine model is established. At the same time, the gear cutting simulation is carried out under VERICUT according the properties of the general six-axis CNC and the relevant configuration parameters. By means of this method, the accuracy of the epicycloids bevel gear cutting system based on a general six-axis CNC can be well verified. Finally, a cutting experiment is conducted.

Abstract: The paper describes the whole process of design of the cavity parts taking the ashtay ,which is common in our life, as an example.Firstly,using MasterCAM to complete the model design of ashtray, rough set, tool path settings and NC program.Secondly,editing the program.finally using the Guangzhou NC machining to complete the process of NC machining simulation.The results show the processing form model design to simulation can be completed, the final results is almost ideals. Keywords: MasterCAM,Cavity design,Machining Simulation