9results about "Worm wheels" patented technology

The invention discloses a worm and gear grinding tooth surface forming method and a transmission error evaluation method considering tooth direction crowned shape modification, and the method comprises the steps: firstly obtaining a grinding wheel, a gear and grinding machining parameters, and building a surface model of a gear workpiece and the grinding wheel; comprising grinding wheel axial profile modeling, grinding wheel spiral curved surface modeling, gear end surface profile modeling and gear tooth surface modeling; the maximum tooth direction drum shape modification amount is obtained, and a shape modification curve is calculated according to the shape modification requirement; loading the modification curve into a grinding wheel fixed coordinate system; the grinding wheel rotating coordinate system is converted into a gear rotating coordinate system through coordinate transformation; information of the grinding wheel rotating coordinate system is transmitted to the gear, generation operation is conducted on the surface of the gear, and the tooth surface morphology of the gear is obtained; and finally carrying out distortion calculation on the tooth surface of the gear. According to the method, the influence of tooth direction crowned shape modification can be considered when the continuous generating grinding tooth surface generation model is constructed, so that accurate calculation and control of tooth surface morphology are realized.

1. A method for hard micromachining of gear teeth on a workpiece using geometrically undefined cutting edges by generating grinding, wherein a grinding worm, in particular a multi-start grinding worm with bonded abrasive grains made of CBN or diamond, is brought into machining engagement with the gear teeth at a machining position and is re-profiled after machining one or more workpieces of a workpiece batch, thereby undergoing material removal and thus reducing the central pitch diameter of the grinding worm before being used for further machining, and during re-profiling a profiling means is positioned by a rotation axis relative to the orientation of the worm thread, and material removal is carried out in particular at a profiling position different from the machining position, accompanied by removal of metal material binding the abrasive grains.

The application discloses a worm and gear grinding device, and relates to the technical field of worm and gear grinding devices, which comprises a chassis, a rack assembly, a lifting assembly, a positioning assembly and a grinding force control assembly. The rack assembly is installed on the chassis, the lifting assembly and the positioning assembly are both installed on the rack assembly, the lifting assembly is used for driving the worm to lift relative to the worm gear, the positioning assembly is used for positioning the worm gear, the worm gear is engaged with the worm, the worm can rotate, the grinding force control assembly is installed on the positioning assembly, and the grinding force control assembly is used for controlling the size of the grinding force between the worm gear and the worm. The application can control and stabilize the grinding force, and realizes efficient and precise grinding of the worm and gear.

The invention discloses a worm and gear grinding tooth surface forming method and a transmission error evaluation method considering multi-head grinding wheel base pitch errors, and the method comprises the steps: firstly obtaining parameters such as a gear, a grinding wheel, machining and multi-head grinding wheel base pitch errors, defining the base pitch errors, building a grinding wheel surface model considering the errors, and building a standard involute gear model; then the grinding wheel rotating coordinate system is sequentially converted into a gear rotating coordinate system through coordinate transformation, tooth surface generation operation is conducted, and the tooth surface morphology is obtained; and finally, carrying out fast Fourier transform analysis on the tooth surface ripples, extracting tooth surface features and evaluating the ghost frequency noise risk. According to the method, the influence of the base pitch error of the multi-head grinding wheel can be accurately considered in the tooth surface generation process, tooth surface morphology prediction and howling risk analysis are achieved, and high universality and engineering application value are achieved.

The invention relates to a method for a hard-fine machining of teeth on workpieces using geometrically undefined cutters by means of a continuous generating grinding process in which a grinding worm, in particular a multi-thread grinding worm, with bonded abrasive grains made of CBN or diamond in particular is brought into machining engagement with a toothing at a machining location and is reprofiled after machining one or more workpieces of a workpiece batch, thereby undergoing material abrasion and thus reducing the average pitch diameter of the grinding worm, before being used for additional machining. During the reprofiling, a profiling means is positioned relative to the worm thread orientation using a rotational axis, wherein the material abrasion occurs at a profiling location, which differs from the machining location in particular, under the effect of the abrasion of a metal material which bonds the abrasive grains.

The present invention relates to an apparatus and a method for machining a worm shaft of a double enveloping worm gear composed of a double enveloping worm shaft and a worm wheel, and enables X-axis movement of the worm shaft, Y-axis and Z-axis movements of a worm machining cutter, A-axis rotation of the worm shaft, C-axis rotation of the cutter, and B-axis tilting of a saddle on which the cutter is provided, and thus can facilitate worm shaft machining.

The present application relates to gear machining technical field, especially a kind of variable tooth thickness modification machining method for double lead worm gear and worm, including the wave form distortion rate of idle cutting force of hobbing cutter and torsional stiffness coefficient;Real-time monitoring cutting force wave form distortion rate and tool torsional deformation, calculate disturbance intensity index to divide disturbance level and set detection opportunity;Through the tooth thickness curve of actual measurement, tooth thickness change rate coefficient is obtained to judge machining quality;The tooth thickness deviation curve of unqualified tooth groove is analyzed to determine the dominant interference type, and the spindle speed or tool pose is regulated based on disturbance level;The control effect is verified by attenuation coefficient;When not up to standard, attenuation difference is used to optimize control coefficient;Finally, the overall quality of worm is evaluated by the consistency coefficient of tooth thickness change rate of each tooth groove of full tooth surface.The present application solves the problem that the full tooth surface consistency of formed worm is low due to the resonance and deformation disturbance of asymmetric characteristics of hobbing cutter in variable tooth thickness worm machining.

A worm wheel (100) is provided with: teeth (20) which are formed on the outer periphery and which mesh with a worm shaft (6); a tooth bottom (30) formed between adjacent teeth (20), the tooth bottom (30) having: a central portion (31) which forms a predetermined range in the axial direction so as to include the center of the worm wheel (100) in the axial direction, and which has the same distance from the center of the worm wheel (100) in the radial direction; and curved surface parts (36) which are respectively formed at both end parts of the central part (31) in the axial direction, extend to both end parts of the tooth bottom (30), and have a distance in the radial direction from the center of the worm wheel (100) that increases as the distance approaches both end parts of the tooth bottom (30), the teeth (20) being provided with: helical tooth parts (21) that are continuous with the central part (31); and a worm gear tooth section (26) connected to the curved surface section (36).

The invention discloses a worm and gear grinding device, and relates to the technical field of worm and gear grinding, the worm and gear grinding device comprises a chassis, a rack assembly, a lifting assembly, a positioning assembly and a grinding force control assembly, the rack assembly is mounted on the chassis, the lifting assembly and the positioning assembly are both mounted on the rack assembly, and the grinding force control assembly is mounted on the lifting assembly. The lifting assembly is used for driving the worm to ascend and descend relative to the worm gear, the positioning assembly is used for positioning the worm gear, the worm gear is meshed with the worm, the worm can rotate, and the grinding force control assembly is installed on the positioning assembly. And the grinding force control assembly is used for controlling the grinding force between the worm gear and the worm. The grinding force can be controllable and stable, and efficient and precise grinding of the worm gear and the worm is achieved.