105results about "Worm wheels" patented technology

The invention provides methods for designing and manufacturing double-lead linear contact bias worm drive, belonging to the fields of machinery principle and machinery manufacture. The double-lead linear contact bias worm drive belongs to the spiroid drive mode in the worm gear drive. The designing method in the invention has the following steps: 1. determining basic parameters according to the power, the transmission ratio and the rotating speed required to be transmitted; 2. performing parameter designing by taking a specified reference circle as a standard on the basis of preliminary calculation of the outer diameter of a worm gear; and 3. calculating each parameter in terms of the formula deduced from the above parameter designing. The manufacturing method in the invention comprises a mitting method, a fly-cutter hobbing method and a numerical control turning method. The invention has a simple and precious designing method, which can simplify the structure of the worm gear and machining and manufacturing; the current machine tool and cutter can be used to perform machining on tooth surfaces without adding other devices or using special machine tools and cutters except for adopting a special machine tool for efficient and high precision machining.

The present invention provides a five-simultaneously-working axis computerized numerical controlling system tooth cutting machine tool for toroidal worms, comprising two parts a body of the machine tool and a controlling cabinet. The body comprises a bed, a spindle box with a spindle, a longitudinal sliding table, a traverse slider, a vertical guideway mounted on the slider and a tailstock, a cutter rest that supports a rotating cutter head is mounted on the vertical guideway. The spindle rotates about A-axis thereof, the table longitudinally slides along Y-axis relative to the bed, the cutter head rotates about B-axis thereof and transversely shifts X-axis as well as the cutter head makes up or down shift along Z-axis of the vertical guideway. The controlling cabinet is equipped with the programs for controlling spindle rotation and for controlling the shifting along longitudinal, transverse and vertical directions as well as the rotation of the cutter head so as to make the rotation about or the shifts along five axes of A, B, Y, X and Z have simultaneously work together to control the shifting of the cutting edges of the cutter on the cutter head and simulate the rotating motion of an inclined plane in space in order to envelop cut the tooth flanks of plane enveloping toroidal worms. The effect of this invention shows that the rotating speed of cutter shaft and workpiece shaft can make the cutting velocity up to 200 m/min, and the working efficiency is six to seven times higher than that of worm grinding, the productivity can greatly be improved.

By finding a range of an allowable error of maximum meshing position of a worm shaft in an axial direction relative to a worm wheel, that is higher than that of a worm shaft of a conventional worm gear unit, a worm gear unit of the present invention is provided.

A manufacturing method for a worm wheel, the worm wheel meshed with an operational worm at usage, has steps of preparing a worm wheel, in which at least a surface layer of a tooth portion is made of synthetic resin, preparing a machining worm, in which pitch of teeth of the machining worm in an axial direction thereof is the same as that of an operational worm, diameters of tip and root portions of the tooth of the machining worm are equal to or more than those of the operational worm and abrasive grains are provided on a surface of the machining worm by means of electro-deposition, disposing the machining worm in a twisting position relative to the worm wheel and rotating the machining worm and the worm wheel with meshing each other so as to machining the tooth portion of the worm wheel.

The invention relates to an angle-modified dual-torus double-enveloping toroidal worm pair and a manufacturing method thereof. The technical scheme is as follows: firstly manufacturing a toroidal worm, and using a dual-torus disc grinding wheel (2) for grinding a toroidal worm blank (1), wherein the included angle between the axial line kod of a cutter holder and the axial line kol of the worm blank (1) is 90 degrees plus the axial line deflection angle delta sigma; leading the cutter holder to do the spiral motion, wherein the parameter is pd; and the transmission ratio of the worm blank (1) to the cutter holder is ild, the central distance is ad, and the angle modifying parameter delta sigma, the ild, the ad and the pd are determined according to the formula of the technical scheme. The technical scheme further comprises the steps of roll-cutting a worm gear, and leading the generating surface of a toroidal roller-cutter to be consistent with the spiral surface of the toroidal worm; leading the relative position and the relative motion of a cutter and a worm gear blank to be the same with the corresponding toroidal worm pair, and carrying out radial feed till the central distance of the toroidal roller-cutter and the worm gear blank is equal to the central distance a of the worm pair. The manufactured angle-modified dual-torus double-enveloping toroidal worm pair has the advantages of large bearing capacity, high transmission efficiency and long service life, and can be used in the situations of multiple heads and small transmission ratio.

The invention discloses an efficient, energy-saving and high-precision gear hobbing machine applied to a mechanical processing field. The machine comprises uprights, a machine case and supporting legs, wherein the uprights are installed on slide rods; a working table is disposed under a work piece mandrel; a control panel is disposed under a pressure meter; the machine case is installed under a machine body; and an electric hydraulic pump and a displacement sensing movable device are electrically connected to the control panel. The machine disclosed by the invention has the advantages that the structure is scientific and rational; use and operations are safe and convenient; work is efficient; comprehensive functions are provided; an infrared distance measuring sensor is disposed, so that errors generated to a pitch of a processed gear can be detected; a prompt lamp is turned on to send out a prompt; consumption of time and materials is reduced; an emulsified oil sprayer and a circulating oil pump are disposed, so that lubrication, cooling and iron scrap removal can be implemented to the processed gear, and production and processing efficiency can be effectively increased; emulsified oil can be recycled, so that consumption of resources is reduced; and the displacement sensing movable device is disposed, so that the gear can be processed precisely according to processing requirements.

The invention discloses a numeric control worm-gear hobbing machine which comprises a machine tool base, a servo motor, a speed reducer connected onto the servo motor, a box body connected onto the speed reducer, a bearing arranged in the box body and a main shaft which is inserted into the box body and is joined with the bearing, wherein the box body provides a stable support for the main shaft as well as provides a mounting space of the bearing; a worktable is arranged on the main shaft; a workpiece to be processed is arranged on the worktable; and the workpiece is fixed by a gland nut and a compressed end cover. A hobbing structure is arranged beside the workpiece and is arranged on a hobbing base. The hobbing base is positioned on a sliding table; a thrust mechanism is arranged below the sliding table; the thrust mechanism means that the servo motor is combined with a motor base to push the sliding table positioned on the driving nut to move through a ball screw rod and the driving nut; and the thrust can be controlled by an instruction transmitted by a system. According to the numeric control worm-gear hobbing machine, during production, multiple machine tools can be managed by one person; and an electronic gear is quick in replacement speed, and thus the production efficiency is high.

Enveloping worm threads with less than one revolution have on one side concave surface and on another side convex surface. This makes generation of concave and convex enveloping worm surfaces simultaneously and makes modification of surfaces by individual machining of each surface. Proposed method uses cutting edges that have rotation radius according with radius of curvature of machining surface. Another variation simultaneously cuts several threads, where enveloping worm blank has rotation around its own axis of rotation and relative motion to helical cutter around tooling axis. This reduces production cost and makes manufacturing easily.

A worm wheel including first toothing regions transitioning into and on either side of a second toothing region and a complete annular surface on both ends of the worm wheel. The first toothing regions may have a constant outer diameter and the second toothing region may be depressed relative to the first toothing region. The first toothing regions may be globoid toothing regions and the second toothing region may be a cylindrical toothing region.

The invention discloses an offset worm and wormwheel transmission designing and manufacturing method. The offset worm and wormwheel transmission designing and manufacturing method comprises the following steps: a. determining a gear face equation of the worm according to an actual machining parameter and a worm design principle; b. obtaining a gear face equation of the wormwheel according to the gear face equation of the worm and a gear face meshing principle and according to the installing position of the worm and wormwheel; and c. carrying out tooth direction and tooth profile shaping to the wormwheel so as to drive the worm and the wormwheel to form point contact that the contact area is elliptically shaped, and the long axis direction of the contact area is perpendicular to the relative movement direction of the gear face of the worm and the wormwheel so as to form a beneficial contact condition of extreme pressure lubrication. According to the method, after the worm and the wormweel which are meshed mutually are designed, the worm is shaped, so that the gear face is meshed to be point contact; the meshing moulage is adjusted conveniently; the installation error is absorbed; and at the same time the contact area of the worm and the wormwheel is elliptically shaped and the long axis of the contact area is perpendicular to the direction that the gear faces of the worm and the wormwheel move relatively, so that the worm and the wormwheel which are meshed mutually are under lubrication in a good state.

The invention discloses a machining method for dual-lead linear contact offset worm drive, which belongs to the technical field of manufacture. The dual-lead linear contact offset worm drive belongs to a spiroid drive form in worm wheel and worm drive. The machining method disclosed by the invention comprises a milling machining method, a fly-cutter hobbing machining method and a numerical control lathe machining method. By using the invention, accurate and structure-simplified worm wheel and worm are obtained aiming at a dual-lead linear contact offset worm drive designing method without efficient and high-precision machining of a special lathe, and a tooth surface is accurately machined by using the traditional lathe and the traditional tool without addition of other equipment or use ofa special lathe and a special tool.

The invention belongs to the field of online detection and discloses a high-precision worm gear machining machine tool with an online detection mechanism and a measurement control system of the high-precision worm gear machining machine tool. The high-precision worm gear machining machine tool comprises a large vertical column and a workbench, and a slide plate is arranged on the large vertical column arranged on a machine tool body. The online detection mechanism is formed by a driving device and a measurement device, the driving device comprises a slide seat, a fixed seat and a travel switch, the slide seat is arranged on a mounting seat which is fixed to the bottom of the slide plate, the measurement device is mounted on the slide seat, and a piston is arranged on the fixed seat. The slide seat is further provided with a storage cavity, a switch starter, a rear oil port and a front oil port, the storage cavity matched with the piston, the switch starter matches with the travel switch, and the rear oil port and the front oil port are communicated, on two sides of the piston, with the storage cavity. The high-precision worm gear machining machine tool has advantages that by the driving device, the measurement device is clamped on the slide plate, small-stroke feeding of the measurement device is realized so as to realize detection of pitch errors and pitch accumulative overallerrors of worm gears machined by the machine tool, repeat positioning precision of the measurement device is improved, and accordingly measurement precision is improved.

A numerical control lathe for processing worm gears comprises a lathe bed, a gearbox at one end of the lathe bed, a worm gear hob and a first planker, wherein a spindle is arranged in the gearbox; a spindle encoder is mounted on one side of the gearbox; a numerical control system in circuit connection with the spindle encoder is arranged at the upper part of the gearbox; a tail stock is arranged on the other side of the lathe bed; an apex is mounted on the tail stock; one end of the worm gear hob is mounted in a taper hole of the spindle; the other end of the worm gear hob is butted with the apex; the first planker is arranged in the middle of the lathe bed; a first stepping motor and a feeding planker matched with the first planker are arranged on the first planker; the feeding planker and the first stepping motor are connected with each other through a horizontal feeding screw rod; a rotary table and a rotary stepping motor in circuit connection with rotary table are arranged on the feeding planker; and the rotary stepping motor is in circuit connection with the numerical control system. The numerical control lathe has the advantages that the processing of the worm gears is fulfilled on the numerical control lathe; enterprises' acquisition costs are reduced; the problem that the conventional hobbing machine processing index error is difficult to eliminate is solved; and the machining precision is greatly improved.

The invention discloses a modeling method of a non-linear contact arc tooth surface, which comprises the following steps of: establishing a convex circular arc turning tool and a worm coordinate system; establishing The worm tooth surface equation, and obtaining the worm axial tooth profile equation and the worm normal tooth profile equation; establshig The meshing coordinate system of worm gear and worm is established, and establishing the transformation relation of each coordinate system; Establishing a worm gear tooth surface equation; According to the established worm gear and worm arc tooth surface equations, simulating the three-dimensional entity of worm gear arc tooth surface, worm arc tooth surface and worm gear-worm transmission pair arc tooth surface. According to the established worm gear and worm arc tooth surface equation, the invention adopts MATLAB software for data processing and simulation to construct the arc tooth surface with low induced curvature, lubrication angle closer to 90 DEG and more easy to form oil film, which establishes a good foundation for manufacturing and modifying the arc tooth worm gear tooth surface.

The invention relates to a machining method for a worm gear pair. The machining method for the worm gear pair comprises the following steps that a gear hob of which the modulus and the tooth profile angle are the same as the modulus m and the tooth profile angle alpha of a worm gear is selected according to the parameters of the worm gear in the worm gear pair needing to be machined to enable the gear hob to machine the worm gear of which the helical angle is the same as the lift angle lambda of a worm; the tooth profile angle alphat of a lathe tool used for machining the worm is calculated according to the parameters of the worm in the worm gear pair needing to be machined; a corresponding tool setting sample plate is manufactured according to the calculated tooth profile angle alphat of the lathe tool; blade grinding of the lathe tool is performed according to the tool setting sample plate; tool packing is performed and lathing is performed on a workpiece. According to the machining method for the worm gear pair, the blade grinding angle of the lathe tool can be quickly calculated, machining of the worm is convenient and fast, and the meshed effect of the manufactured worm and worm gear is good.

A forming method for milling teeth of variable tooth worms (VTW) with the following features: on a multi-axis simultaneously-working CNC machine-tool a moving coordinate system {σ₁(φ₁)[O₁;{right arrow over (i)}₁(φ₁),{right arrow over (j)}₁(φ₁),{right arrow over (k)}₁ (φ₁)]} is correlated to the worm blank of the VTW worms, whereon the worm blank of the VTW worms rotates around {right arrow over (k)}₁(φ₁)-axis at angular speed |{right arrow over (ω)}₁|; another moving coordinate system {σ₂(φ₂)[O₂; {right arrow over (i)}₂(φ₂), {right arrow over (j)}₂(φ₂), {right arrow over (k)}₂(φ₂)]} is correlated to the milling cutter, whereon the milling-cutter rotates around {right arrow over (k)}₂(φ₂)-axis at angular speed |{right arrow over (ω)}₂|, |{right arrow over (ω)}₁|/|{right arrow over (ω)}₂|=i₁₂ and i₁₂ is a constant; the feed motion of the milling cutter comprises the radial shift along {right arrow over (i)}₂(o₂)-axis and the peripheral shift around {right arrow over (k)}₂(φ₂)-axis; the equations of the cutting edge of the milling cutter are given as below

x=u

y₂=r_b−v sin β

z₂=v cos β.

The invention discloses a machining method of a worm gear with the straight profile helical surface. The machining method comprises step 1, installing a fly cutter, wherein a right tooth-shaped fly cutter and a left tooth-shaped fly cutter are separately fixed on a cutter rod of the fly cutter through screws and the cutter rod of the fly cutter is connected with a cutter frame of a machine tool; step 2, adjusting the machine tool, wherein the installation basic surface of the cutter rod is corrected with the working surface of the machine tool as the benchmark when the cutter rod with the installed cutter is arranged on the machine tool so as to enable the center line of the cutter rod of the fly cutter to be parallel to the working surface; step 3, performing cutter setting, wherein the cutting edges of the right tooth-shaped fly cutter and the left tooth-shaped fly cutter are symmetrical relative to the center line of a rotary working table; step 4, determining the spiral inclined angle of the worm gear, wherein the inclined angle of a grinding wheel, relative to the axis of the worm gear when a worm is ground, namely the inclined angle of the main plane, serves as the spiral angle of the machined worm gear and a differential hanging wheel of the machine tool is adjusted according to the inclined angle; step 5, performing feeding, wherein the feeding is performed to the total tooth depth in the radial direction and the axial feeding is performed to achieve the machining of the worm gear. According to the machining method of the worm gear with the straight profile helical surface, the machining method is simple and the accuracy of the worm gear is high.

The invention discloses an efficient side edge finish-milling machining method based on a Niemann worm wheel mathematical model. The method comprises the following steps that (1) the maximum normal curvature of a certain contact point of a worm toothed surface is solved; (2) the induced normal curvature of a certain contact point of two conjugate toothed surfaces of a worm and a worm wheel in thenormal direction of a contact line is solved; (3) the maximum normal curvature and the minimum curvature radius of a certain contact point of a worm wheel toothed surface are solved; (4) the minimum curvature radius of the worm wheel toothed surface is solved; (5) the tool path feeding length is determined; (6) the distance between adjacent tool path rows is determined; (7) the cutter-axis vectorof an end mill is solved; (8) the cutter location point of the end mill is solved; and (9) interference checking and treatment are performed. According to the Niemann worm wheel efficient side edge finish-milling machining method provided by the invention, the problems that point milling machining is long in period and high in cost are effectively solved; and since the side surface milling machining adopts cutter side surface cutting, the number of feeding times can be effectively decreased on the premise of the equal scallop height, and accordingly, the machining efficiency is improved.

The invention relates to a method for machining a worm gear through a standard gear hob and machining a worm meshed with the worm gear through a turning tool. According to the technical scheme, the standard gear hob is selected, wherein the nominal modulus and the pressure angle of the standard gear hob are equal to the nominal modulus and the pressure angle of the worm gear to be machined, the diameter of the standard gear hob is larger than that of the worm meshed with the worm gear to be machined, and the axial length of the standard gear hob is larger than the rim width of the worm gear to be machined; the standard gear hob is placed perpendicular to the end face of the worm gear to be machined, wherein the standard gear hob and the worm gear to be machined are kept connected in the radial direction, and the spiral line directions are approximately the same; then, the standard gear hob is rotated by an angle theta, so that the spiral line of the standard gear hob and the spiral line of the worm gear to be machined completely coincide. When a single-start worm is machined, the modulus mc and the pressure angle alpha c of the turning tool are equal to the nominal modulus m0 and the pressure angle alpha0 of the worm respectively; when a multi-start worm is machined, the following relation between the modulus mc and the pressure angle alpha c of the turning tool and the nominal modulus m0 and the pressure angle alpha0 of the worm is met.

The invention relates to a machining method for a worm gear tooth part. The machining method comprises the steps that S1, arc machining is conducted on the worm gear tooth part; S2, the half angles of hobs and the center distance between the center of each hob and the center of a worm gear are calculated; S3, rough hobbing is conducted on the worm gear tooth part; S4, semi-finish hobbing is conducted on the worm gear tooth part; S5, finish hobbing is conducted on the worm gear tooth part; S6, grinding is conducted on the worm gear tooth part. The step S3, the step S4, the step S5 and the step S6 are all performed on a gear hobbing machine, and the same datum plane is utilized; the worm gear hubs used for gear hobbing conducted on the worm gear tooth part in the step S3, the step S4 and the step S5 are large-diameter worm gear hobs. The machining method has the advantages that a machined worm gear is high in accuracy and stable in transmission, contacting surfaces are easy to match, gear teeth are good in abrasion resistance, and bending strength is high.