The basic theory of the axial drifting of the cylinder on a welding roller ded is introduced in the the paper,at,the same time,experiment and study for the mechanism of axial drifting of the cylinder have been done on...The basic theory of the axial drifting of the cylinder on a welding roller ded is introduced in the the paper,at,the same time,experiment and study for the mechanism of axial drifting of the cylinder have been done on an experimental of the welding roller bed.It shows that the main cause of the axial drifting of the cylinder lies in the existence of spiral angle between cylinder and rollers.the relative axial motions between rollers and cylinder are composed of spiral motion,elastic slide and frictional slide.The theory of the compatible motion and the non-compatible one is put forward for the exial motions of the cylinder.The relative axial motion between rollers and cylinder is coordinated by elastic slides and frictional slides between two ones.展开更多
How to generate rake faces of nonconventional milling cutters (NCMC) with constant spiral angled and normal rake angled edges on NC machine tools is presented by use of a blunt cup grinder or a cup milling cutter. Mot...How to generate rake faces of nonconventional milling cutters (NCMC) with constant spiral angled and normal rake angled edges on NC machine tools is presented by use of a blunt cup grinder or a cup milling cutter. Motion functions of the NC machining system are mathematically deduced and exam- ed by a experiment. The research will provide theoretical and practical guidance for machining noncon- ventional tools on NC machine tools.展开更多
The cutter systems of hypoid gear cutting machines contain groups of inside and outside blades.In these cutter systems,the side cutting edges of the blades machine the convex and concave gear teeth while rotating abou...The cutter systems of hypoid gear cutting machines contain groups of inside and outside blades.In these cutter systems,the side cutting edges of the blades machine the convex and concave gear teeth while rotating about the cutter rotation axis.The side cutting edges lay on the rake face formed through the blade,rake,and relief angles;hence,the normal cross-section of the cutter swept surface forms hyperboloid gear teeth.Using the accurate geometry of the cutter system,a relationship between the pressure and spiral angles of the gear tooth and the parameters of the cutter system is developed for the FORMAT machining of a hypoid gear.A new parameterization of the gear tooth surfaces is introduced to determine these angles for the accurate gear tooth by the accurate cutter system.A numerical example with different cutter systems and blade parameters is presented,demonstrating the effects of rake and relief angles over the pressure and spiral angles on mea n point projections and gear tooth surface.Finally,the change in pressure and spiral angles with respect to the rake and relief angles are plotted,and the results are analyzed.Finally,it is concluded that the pressure and spiral angles are changed up to a few seconds of a degree in the operating area of the tooth with the change in the back and side rake angles.The side relief angle exhibited little or no effect over the geometry of the gear tooth.展开更多
文摘The basic theory of the axial drifting of the cylinder on a welding roller ded is introduced in the the paper,at,the same time,experiment and study for the mechanism of axial drifting of the cylinder have been done on an experimental of the welding roller bed.It shows that the main cause of the axial drifting of the cylinder lies in the existence of spiral angle between cylinder and rollers.the relative axial motions between rollers and cylinder are composed of spiral motion,elastic slide and frictional slide.The theory of the compatible motion and the non-compatible one is put forward for the exial motions of the cylinder.The relative axial motion between rollers and cylinder is coordinated by elastic slides and frictional slides between two ones.
文摘How to generate rake faces of nonconventional milling cutters (NCMC) with constant spiral angled and normal rake angled edges on NC machine tools is presented by use of a blunt cup grinder or a cup milling cutter. Motion functions of the NC machining system are mathematically deduced and exam- ed by a experiment. The research will provide theoretical and practical guidance for machining noncon- ventional tools on NC machine tools.
文摘The cutter systems of hypoid gear cutting machines contain groups of inside and outside blades.In these cutter systems,the side cutting edges of the blades machine the convex and concave gear teeth while rotating about the cutter rotation axis.The side cutting edges lay on the rake face formed through the blade,rake,and relief angles;hence,the normal cross-section of the cutter swept surface forms hyperboloid gear teeth.Using the accurate geometry of the cutter system,a relationship between the pressure and spiral angles of the gear tooth and the parameters of the cutter system is developed for the FORMAT machining of a hypoid gear.A new parameterization of the gear tooth surfaces is introduced to determine these angles for the accurate gear tooth by the accurate cutter system.A numerical example with different cutter systems and blade parameters is presented,demonstrating the effects of rake and relief angles over the pressure and spiral angles on mea n point projections and gear tooth surface.Finally,the change in pressure and spiral angles with respect to the rake and relief angles are plotted,and the results are analyzed.Finally,it is concluded that the pressure and spiral angles are changed up to a few seconds of a degree in the operating area of the tooth with the change in the back and side rake angles.The side relief angle exhibited little or no effect over the geometry of the gear tooth.
