RESEARCH USING CAE ON PERFORMANCES EVALUATION FOR MACHINE TOOL ORIENTATION AND CLAMPING DEVICES

The paper presents the stages of CAE, which is composed by CAD-FEM for determining optimal construction and loads for a modular fixture device for prismatic and circular work-pieces. Such devices are used for processing on CNC performance machine tools, like machining centres including 5-axis CNC milling machines. It is presented the methodology of analysis and results of its application. Are established numerical analyses ways, in the conditions defined by the loadings and identified the most solicited area of the device structure. It is recommended in that the area be placed a strain sensor. This is an important step needed transformation into a mechatronic device

RESEARCH REGARDING PERFORMANCE EVALUATION USING FEM OF ORIENTATION AND CLAMPING DEVICES FOR MACHINE TOOLS

The paper presents the stages of CAE, which is composed by CAD-FEM for determining optimal construction and loads for a modular fixture device for prismatic and circular work-pieces. Such devices are used for processing on CNC performance machine tools, like machining centres including 5-axis CNC milling machines. It is presented the methodology of analysis and results of its application. Are established numerical analyses ways, in the conditions defined by the loadings and identified the most solicited area of the device structure. It is recommended in that the area be placed a strain sensor. This is an important step needed transformation into a mechatronic device

Computer aided parametric design of hydraulic gear pumps

This paper addresses methodological and applied issues to design spur gear pumps. Based on the requirements raised by a Romanian production partner, the overall objective of this research is to identify several design alternatives and to propose improved construction solutions, which are strongly backed by mathematical validation and finite element simulation. The parametric design is simulated usingfinite element method to prove the concept for a wider range of flow rates. Using tools like CATIA and Visual Basic programming language, the proposed strategy presents the results summarizing the values ofmaximum stress, deformation and the percentage calculation error for each constructive solution

Theoretical considerations concerning the profile error of the thread flank

In the case of metric thread, a possible source of the flank error could be the position of the cutting tool edge, which could not intersect the circular cylindrical surface axis. An analytical method of approximation was applied to model the way in which the flank error is generated by considering some geometrical conditions. A theoretical simplified model was determined to highlight the influence of the thread external diameter and of the distance between the circular cylindrical surface axis and the thread rectilinear generatrix on the profile error of thread flank

Theoretical considerations concerning the profile error of the thread flank

In the case of metric thread, a possible source of the flank error could be the position of the cutting tool edge, which could not intersect the circular cylindrical surface axis. An analytical method of approximation was applied to model the way in which the flank error is generated by considering some geometrical conditions. A theoretical simplified model was determined to highlight the influence of the thread external diameter and of the distance between the circular cylindrical surface axis and the thread rectilinear generatrix on the profile error of thread flank