Design Of Globoidal Indexing Cam Manipulator And Study Of Simulation Analysis

With the rapid development of manufacturing industry, numerically controlled machinetools has been used more and more widely. At present, most of the high end numericallycontrolled machine toolsadopts the automatic tool changing-manipulator. Globoidal indexingcam, which is a key impartment of automatic tool changing-manipulator, is difficult tomanufacture, it determines the positioning accuracy of tools and the length of indexing time.Low accuracy and transmitted unstable, globoidal indexing cams which produced in domesticare only used in low end products. Most of the high-accuracy globoidal indexing cams used inautomatic tool changer are imported from abroad. Therefore, it is of great significance toresearching high-precision globoidal indexing cams and producing advanced cam toolschanging-manipulator.On the basis of fully understanding the development situation and research achievement ofgloboidal indexing cam manipulator both at home and abroad, this paper compares and analyzesthe various research methods, finding that the design difficulty of globoidal indexing cammanipulator is mainly due to three aspects, those are cam solid modeling, processing andmanufacturing, and intensity analysis. This paper carries out a study on the said three aspects ofcam entity, with a new modeling approach. Afterwards, motion simulation and machiningsimulation are exercised. Finally, an analysis is made on the intensity of cam. The main researchcontents and innovation points are shown below:(1) The development situation of domestic and overseas manipulator are presented. Thegloboidal indexing cam is chosen as the driving mechanism of manipulator according to thefeatures of tool changing technique with manipulator, and the process of tool changing iselaborated. On the basis of analysis of common cam motion law curves’ advantages anddisadvantages, the calculation and comparing are did by using the Matlab software. And the finalmotion law curves with good overall performance are given, relatively ideal motion cycle chartfor manipulator are given.(2) On the basis of establishing space coordinates system and space profile equation forgloboidal indexing cam, the motion paramenters and geometrical paremeters of globoidal indexing cams are design and caulculated. By using the Matlab software, the space profileequation are ccalculated and three-dimensional coordinate value are given. The solid modelingof goboidal indexing cam are established by “curve to cratesurface”,“surface to removecylinder” after importing the three dimensional coordinate value into the SolidWorks software.(3) The model are established and assembled by using the three-dimensional modelingsoftw SolidWorks. Its movement status of the swivel plate, angular displacement, change resultof angular velocity, accelerated angular velocity are given by motion simulation. The compareof theoretical calculation value and simulation value are also did. With the help of MasterCAMsoftware, overall motion process of tooling globoidal indexing cam are observed. The NCprogram are given.(4) Static analysis, frequency analysis and fatigue analysis of the globoidal indexing camwith three kinds of materials are did in the software SolidWorks. The results confirm that thedesign of globoidal indexing cam are good, its strength、freqency, and fatigue performance arequalified. The design methods presented in this article can cut down the development periodsharply.