Abstract: The present invention belongs to the field of mechanical transmission technology, and proposes a non-orthogonal elliptical toroidal worm gear pair, including an involute cylindrical gear and an elliptical toroidal worm formed by a primary envelope of the involute cylindrical gear; both adopt spatial non-orthogonal transmission, and the shaft angle satisfies the self-locking condition and the restriction condition of minimum tooth top width; the toroidal generatrix of the elliptical toroidal worm is elliptical, which can increase the number of meshing teeth and the total length of instantaneous contact line. A non-orthogonal elliptical toroidal worm gear pair proposed in this invention has the characteristics of toroidal worm drive and can realize the whole facewidth of the gear to participate in the meshing drive.

Abstract: A pure-rolling generating measurement method and device for gear helix artifact is proposed, which use a dividing table to accurately control the linear rail slide block assembly component to rotate according to the helix angle of different base circle. The height of the measuring point is the installation height of the working plane of generating rails, so as to ensure that the measuring point is always located on the dividing cylindrical surface of the gear helix artifact. When the gear helix artifact does pure-rolling motion, the slide block performs high-precision linear motion on the working surface of two fixed rails; the pure-rolling motion is proportional to the high-precision linear motion, so that the inductor micro-displacement probe can complete the measurement of the helix deviations of the gear helix artifact with different base circle helix angle.

Abstract: A large gear involute artifact assembled with mandrel used as physical datum of precision traceability and measurement transmission for large gear involute is proposed. The artifact comprises a large gear involute artifact stripe, a mandrel, a backing plate, a counterweight shaft, an adjustable counterweight ring, the adjustable screws of counterweight, the connecting screws for backing plate, the connecting screws for artifact and an eccentric multi-ball bearing. The structure and the rolled length of the large gear involute artifact assembled with mandrel fit the basic requirements of class-1 accuracy in the national standard of gear involute artifact GB/T 6467-2010 in China. It has advantages of long rolled length, adjustable center of mass, uniform datum, compact structure, and portability. It adopts lightweight design, which can be installed and transported by one person manually, and is suitable for the structural design of large gear involute artifact with base-circle diameter greater than 500 mm.

Abstract: A generating device based on friction drive for gear involute artifact with long-rolled path length by rolling method is proposes. The device includes a roller component, rail component and friction-driven component, wherein the roller component consists of a gear involute artifact with long rolled length, a mandrel, a multi-ball bearing for gear involute artifact, the base-circle plates, the parallel sleeves, a multi-ball bearing, the plain washers, the cross washers, and the locking nuts; the rail component consists of a foundation, a location baffle for base-circle plates, rails, the baffles, a location baffle for rail, copper washers, the connecting screws and the set screws of the rail; and the friction-driven component consists of a friction block, a motorized linear sliding table, a vertical sliding table, a vertical foundation and an adapter. It has good market application prospect and popularization value.

Abstract: A lapping device for gear helix artifact with equal common normal by rolling method, use the rotary table to accurately control the angle between the lapping surface of whetstone and the axis of the base-circle cylinder to control the helix angle of base-circle about the involute helicoid. Use the whetstone driven component to drive the whetstone to make a high-precision linear motion in the vertical direction to adjust the position of the lapping surface of whetstone. The distance between the two lapping surface of whetstone is precisely adjusted by the gauge block to control the processing length of the three tooth common normal of the gear helix artifact. The invention provides a lapping device for gear helix artifact with equal common normal by rolling method, it conforms to the generation principle of the involute helicoid, and there is no machining principle error.

Abstract: A reference-level gear helix artifact for transferring gear helix value. The invention provides a reference-level gear helix artifact with a global symmetrical structure that can be easily obtained by generating method. The centroid point of the artifact passes through the geometric center of the artifact mandrel. The cylinder of the reference-level gear helix artifact is provided with the straight tooth groove, the left-hand tooth groove and the right-hand tooth groove, axial reference torus and radial reference cylinder, fine tooth threads and center holes. Among them, the straight tooth groove includes a pair of involute cylindrical surfaces with opposite 0° helix angle, the left-handed tooth groove includes a involute helicoidal surface with 15° and a involute helicoidal surface with 30°, and the right-hand tooth groove includes a involute helicoidal surface with 15° and a involute helicoidal surface with 30°.

Abstract: A mutual-lapping device and mutual-lapping method for improving processing precision based on the principle of error averaging is proposed. The device including driving friction wheel, driving belt pulley, transmission belt A, connecting rod A, rotation shaft segment A, multi-ball sleeve, mutual-lapping gear A, tension spring, driven friction wheel, pendulum bar of the driven friction wheel, driven belt pulley, transmission belt B, connecting rod B, pressure spring of tensioning pulley, tensioner mechanism, rotation shaft segment B and mutual-lapping gear B. By mutual lapping the high-precision gears, not only the pitch deviation, tooth profile deviation, helix deviation and runout can be reduced synchronously, but also the machining cost is low. Meanwhile, the effect of improving pitch accuracy, profile accuracy, helix accuracy and runout accuracy and reducing surface roughness is remarkable.

Abstract: A mutual-lapping device and mutual-lapping method for improving processing precision based on the principle of error averaging is proposed. The device including driving friction wheel, driving belt pulley, transmission belt A, connecting rod A, rotation shaft segment A, multi-ball sleeve, mutual-lapping gear A, tension spring, driven friction wheel, pendulum bar of the driven friction wheel, driven belt pulley, transmission belt B, connecting rod B, pressure spring of tensioning pulley, tensioner mechanism, rotation shaft segment B and mutual-lapping gear B. By mutual lapping the high-precision gears, not only the pitch deviation, tooth profile deviation, helix deviation and runout can be reduced synchronously, but also the machining cost is low. Meanwhile, the effect of improving pitch accuracy, profile accuracy, helix accuracy and runout accuracy and reducing surface roughness is remarkable.

Abstract: A reference-level gear helix artifact for transferring gear helix value. The invention provides a reference-level gear helix artifact with a global symmetrical structure that can be easily obtained by generating method. The centroid point of the artifact passes through the geometric center of the artifact mandrel. The cylinder of the reference-level gear helix artifact is provided with the straight tooth groove, the left-hand tooth groove and the right-hand tooth groove, axial reference torus and radial reference cylinder, fine tooth threads and center holes. Among them, the straight tooth groove includes a pair of involute cylindrical surfaces with opposite 0° helix angle, the left-handed tooth groove includes a involute helicoidal surface with 15° and a involute helicoidal surface with 30°, and the right-hand tooth groove includes a involute helicoidal surface with 15° and a involute helicoidal surface with 30°.

Abstract: The precision lapping and polishing device for external cylindrical surface of disk part and its taper error adjustment method. The device composes a circular baseplate, slant rails, baffles, pressure plates, copper blocks, a washer blanket; blanket plates, a set of bead shafting, a friction driving wheel, a DC motor, a mobile power supply, a LED lamp and a cover body. By adopting the working principle that the generatrix rotates around the fixed axis to form the cylindrical surface, the ultra-precision machining of the cylindrical surface of disk part is realized. The radial-continuous-automatic-micro feeding of the disk part is realized by thinning the thickness of the circular baseplate which is internally tangent to the generatrix of the circular baseplate during the process of lapping and polishing. The device has the advantages of operating simply, adjusting conveniently, low cost and is of important value for popularization and application.

Abstract: The precision lapping and polishing device for external cylindrical surface of disk part and its taper error adjustment method. The device composes a circular baseplate, slant rails, baffles, pressure plates, copper blocks, a washer blanket; blanket plates, a set of bead shafting, a friction driving wheel, a DC motor, a mobile power supply, a LED lamp and a cover body. By adopting the working principle that the generatrix rotates around the fixed axis to form the cylindrical surface, the ultra-precision machining of the cylindrical surface of disk part is realized. The radial-continuous-automatic-micro feeding of the disk part is realized by thinning the thickness of the circular baseplate which is internally tangent to the generatrix of the circular baseplate during the process of lapping and polishing. The device has the advantages of operating simply, adjusting conveniently, low cost and is of important value for popularization and application.