Research On High Effective Techniques For Analyzing And Measuring Machining Errors Of Planar Double-enveloping Toroid Worm Gear Drive

Planar double-enveloping toroid worm gear drive is characterized by high bearingcapacity, high transmission efficiency, long service life and so on. It is extremely widespreadin the transmission domain application. At present, the machining method of planardouble-enveloping toroid worm gear drive is the traditional generation, which leads huge gapbetween domestic products and foreign advanced similar products on machining craft. Theshortage mainly displays in the backward level of machining craft and the precisiondissatisfying the serious situation. The main causes are as follows: the processing device usedto tooth surface processing of planar double-enveloping toroid worm gear drive is backward,it lacks of precision special machine tools and special cutting tools, In addition, machine toolerrors have significant influence on worm pair processing in the manufacturing process. Itbecome a important project to improve the manufacturing level of planar double-envelopingtoroid worm gear drive that how to systematically research the measuring method of machinetool error and machining error for planar double-enveloping toroid worm gear drive in ourcountry. Therefore, it is urgent to deep research the measuring method of machine tool errorand machining error for planar double-enveloping toroid worm gear drive. The paper analyzesthe spatial mechanism of planar double-enveloping toroid worm gear drive bycomprehensively using the spatial meshing theory, CNC machining technology, virtualmeasuring theory, multi-body system theory, VC++, UG/grip and so on. It also reveals theinfluencing law of space machine error of planar double-enveloping toroid worm gear driveand explores the virtual measuring method based on programming simulation on CNCmachining of planar double-enveloping toroid worm gear drive. The main works in this thesiscan be concluded as the follows:1) The paper summarizes CNC machining method for planar double-enveloping toroidworm gear drive, analyze the application of multi-body system theory in the analysis of CNCmachining error, and introduce the theory, method and procedure of virtual measurement,laying theoretical basis for the following research.2) According to the specific geometric structure of CNC machine tools for planardouble-enveloping toroid worm gear drive, space geometric error model of machine tools isestablished by analyzing original geometric motion errors of machine tools.3) Based on1) and2), followed by the derivation of the profile equation of planardouble-enveloping toroid worm gear drive, the processing error model of planardouble-enveloping toroid worm gear drive is established by utilizing the multi-body system theory. Then the paper simulate on the original error of machine tool of planardouble-enveloping toroid worm gear drive. Finally, the comprehensive influencing law oforiginal errors of machine tool on machining errors of planar double-enveloping toroid wormgear drive is revealed.4) The virtual measuring method on machining error of planar double-enveloping toroidworm gear drive is built based on virtual measuring theory. And virtual measuring platform isdeveloped by using UG and VC++. The effective measurement and predication can beachieved based on machining error of the CNC machining simulation of worm and wormwheel.In conclusion，the research provides an effective solution to the highly effective analysisand measurement on machining error of planar double-enveloping toroid worm gear drive,which settle the theoretical basis to improve the level of manufacturing craft of planardouble-enveloping toroid worm gear drive.