65 results about "Involute" patented technology

The invention discloses a straight gear shape-free measurement method based on single-group line structured light. The method comprises the following steps: constructing an optical platform coordinate system, carrying out line structured light coordinate system calibration through a spherical calibration body, and calibrating the rotation center of a precision turntable; installing a measured straight gear, establishing a straight gear coordinate system, and adjusting the position of the linear structure optical measuring head, so that the measuring field of view of the linear structure optical measuring head covers a root circle to an addendum circle of the straight gear; the straight gear is installed on a precision rotary table, the straight gear is driven to rotate at a constant speed, a linear structure optical probe scans and collects straight gear contour point cloud data and circular grating angle information, and tooth surface three-dimensional point cloud data is obtained; based on the three-dimensional point cloud data of the tooth surface, extracting an addendum circle, a dedendum circle and an involute tooth profile, and calculating spur gear parameters; performing reverse three-dimensional shape modification tooth surface identification on the shape modification straight gear to generate a three-dimensional deviation diagram; and outputting a measurement result and printing a report. The problems of shape-free rapid measurement, modification tooth surface identification and tooth surface three-dimensional deviation characterization of the straight gear with unknown basic parameters are solved.

The invention relates to the technical field of high-precision grinding machining of screw elements of large extrusion granulation units, in particular to a rapid alignment and positioning device for an involute spline screw element. The problem of relative position deviation of the machined internal spline and the outer contour milling shape caused by a fit clearance in the original machining process is solved, the high-precision machining effect is achieved, the machining precision of the screw element is ensured, and the clamping and positioning errors in the screw element assembling process are reduced.

According to the involute type multi-arm spiral sound array and the method, in the array, a center supporting piece is of a regular heptagonal plate-shaped structure, seven side edges of the center supporting piece are connected with seven base circle spiral arm connecting pieces in a welding mode respectively, the other end of each base circle spiral arm connecting piece is connected with an internal spiral arm structure, and the other end of each internal spiral arm structure is connected with an outer spiral arm structure; the other end of each internal spiral arm structure is connected with one middle spiral arm structure, and the other end of each middle spiral arm structure is connected with one external spiral arm structure; each external spiral arm structure is in welded connection with the middle spiral arm structure adjacent in the anticlockwise direction through an adjacent arm supporting rod; the bottom face of the center supporting piece is connected with the array connecting piece in a welded mode, and the array connecting piece is connected with the array supporting base structure in a fastened mode through bolts. The internal spiral arm structure, the middle spiral arm structure and the external spiral arm structure are provided with circular through holes used for installing microphones, and the circle centers of the through holes are located on an involute generated by the same base circle.

The utility model relates to a stationary shaft shoulder stirring head which comprises a shaft shoulder and a stirring head coaxially butted with the tail end of the shaft shoulder, the stirring head is of a circular truncated cone structure, the flaring end of the stirring head is coaxially butted with the tail end of the shaft shoulder, and a threaded groove is formed in the annular wall in the axial direction of the stirring head; the stirring head of the circular truncated cone structure is adopted, the design of the axial thread grooves in the annular wall can play a spiral flow guide role on softened metal materials, the problem of material overflow caused by a traditional plane shaft shoulder is effectively avoided, the welding seam filling rate and the joint compactness are remarkably improved, and defects are reduced. Through the synergistic effect of the circular truncated cone structure and the threaded groove, stress is dispersed through the continuous and smooth geometrical shape, the problem of stress concentration caused by multi-groove spaced arrangement of involute grooves in the prior art is solved, meanwhile, the design that the flaring end of the stirring head is embedded into the shaft shoulder ring groove enhances the connection stability, vibration abrasion under high-speed rotation is reduced, and the stirring effect is improved. Durability of the stirring head is remarkably improved, and use cost is reduced.

The invention discloses a wear-resistant elastoplastic body quincunx pump molded line and a quincunx pump thereof. The molded line is fixed by an outer rotor, and an inner rotor performs eccentric motion along the inner side of the outer rotor and is formed by conjugate meshing; the molded line of a first worm claw part of the outer rotor consists of an arc section AB, an arc section BC, a transition cubic curve section CD, an involute section DE, a transition cubic curve section EF and an arc section FG; the molded line of the second worm claw part of the inner rotor is composed of an arc section ab, an arc section bc, a transition cubic curve section cd, an involute section de, a transition cubic curve section ef and an arc section fg. The characteristics of accurate conjugate meshing and point contact of the involute are adopted, compared with line contact of other molded lines, friction abrasion between rotors is reduced, the sealing effect between the involute and the inner wall of a pump body is good under the high-pressure conveying working condition, it is guaranteed that the conveying pressure is lasting and stable, pulsation is reduced, and the working efficiency is improved.

The utility model discloses a variable diameter variable pitch screw rotor, including intermeshing left rotors and right rotors, the end face profile of left rotors with right rotors is same, all by 7 curves first and last connected closed, wherein 7 curves include involute section AB, circular arc section BC, dedendum circular arc section CD, circular arc section DE, cycloid equidistant curve section EF, dedendum circular arc section FG and circular arc conjugate curve section GA, the circular arc BC of left rotors is intermeshed with the circular arc conjugate curve A'G' of right rotors, and the rest line sections are sequentially intermeshed according to the rotating direction of left rotors and right rotors respectively, the screw pitch of left rotors and right rotors is segmented along the axial direction, the left rotors are conical along the air inlet end to the air outlet end, and the right rotors are conical along the air inlet end to the air outlet end. The utility model further provides a vacuum pump. The device provided by the utility model can effectively improve the internal compression ratio and efficiency of the vacuum pump.

The utility model discloses a three -section type conical screw rotor, three -section type conical screw rotor is divided into suction section, compression section and exhaust section in proper order along screw axial direction, the suction section is equal cross section and equal pitch along screw axial direction, the compression section adopts and is variable cross section and variable pitch along screw axial direction, the exhaust section is equal cross section and equal pitch along screw axial direction, the cross section width of suction section along screw axial direction is greater than the cross section width of exhaust section along screw axial direction, the end face profile equation of each section is same, and all are by five curves of abutting together closed, and the five curves include involute section AB, addendum circle arc section BC, long amplitude outside cycloid section CD, dedendum circle arc section DE and point conjugate curve section EA. The utility model also provides a vacuum pump. The device of the utility model can effectively reduce the noise of vacuum pump, reduce the clearance backflow, thereby improve its reliable stability and practical life.

The present invention relates to a spiral for a spiral compressor and a spiral compressor with such a spiral. The spiral compressor (100) has a first spiral (10) and a second spiral (20), wherein the second spiral (20) and the first spiral (10) interact to form compressor chambers for compressing a medium. The first spiral (10) is a stationary spiral, and the second spiral (20) is an orbiting spiral. The first spiral (10) and the second spiral (20) each have an end plate (29) and a spiral turn (21).At least the outer surfaces (222) or the inner surfaces (221) of the spiral screw (21) of at least one of the first spiral (10) or the second spiral (20) use an involute as a reference for generating at least the outer surfaces (222) or the inner surfaces (221), wherein the distance between the at least one outer surface (222) or inner surface (221) of the spiral (21) and the involute gradually increases from a predetermined point between the start point and the end point of the involute to the end point of the involute along the generation line of the involute. The spiral and the spiral compressor improve the sealing effect between the turns of the spiral.

The spiral energy storage spring and the compression spring are integrated inside, or the spiral energy storage spring, the magnetic spring and the planar spring are integrated inside, so as to realize energy storage and passive flexibility, reduce driving consumption and meet the requirement of driving agility.SOLUTION: Disclosed is a flexible joint based on an elastic element, including an involute small-tooth-number difference reducer, a spiral energy storage spring, and a flexible output module / composite flexible output module. The involute small-number-of-teeth difference reduction gear employs only an eccentric input shaft, a pair of involute internal tooth rings, and an involute planetary gear to achieve oscillation and rotation motions of the involute planetary gear. The power output of the output disc is transmitted by the interaction of the column pin and the first column pin working hole of the involute planetary gear or the second column pin working hole of the output disc. The accuracy requirement can be easily met only by the meshing form of the pair of gears, the axial dimension is compact, the pair of gears adopt involute tooth profile, and the manufacturing cost is low.SELECTED DRAWING: Figure 1

A stator twisting apparatus and method for an axial flux hairpin motor. The apparatus comprises an upper drive disc (1), an upper mold tooth assembly (2), a central guide disc (3), a lower mold tooth assembly (4), a lower drive disc (5), and a twisting power assembly, wherein the upper mold tooth assembly (2) comprises a plurality of upper mold teeth (21), the upper mold teeth (21) being mounted on the upper surface of the central guide disc (3); the lower mold tooth assembly (4) comprises a plurality of lower mold teeth (41), the lower mold teeth (41) being mounted on the lower surface of the central guide disc (3); the upper drive disc (1) is provided with a plurality of first involute slide rails (8); the upper drive disc (1) is mounted on the upper surface of the central guide disc (3), and at least part of the upper mold teeth (21) pass through the first involute slide rails (8); the lower drive disc (5) is provided with a plurality of second involute slide rails (18); the lower drive disc (5) is mounted on the lower surface of the central guide disc (3), and at least part of the lower mold teeth (41) pass through the second involute slide rails (18).

The invention discloses a thin plate end pre-curling method and device based on involute curvature, and the method comprises the steps: building an involute curvature model, and designing an up-down opposite-pressing type extrusion device composed of a plurality of extrusion modules with curvatures arranged along an involute in a segmented manner based on the involute curvature model; positioning the end part of the thin plate at a position corresponding to the target curvature in the extrusion device; the extrusion device is driven to be closed, so that the end of the thin plate is subjected to continuous plastic bending along an involute track; the pre-curling curvature is compensated according to the springback characteristic of the thin plate material; and the pre-curled thin plate is fed into a plate rolling machine to be integrally rolled, and the curvature of the ends is continuous and consistent with the curvature of the cylinder body. By means of the characteristic that the curvature of the involute continuously changes from small to large, elastic springback in the pre-bending process of the end of the high-springback material can be effectively reduced, straight edges of the end after edge rolling are remarkably reduced, and the overall roundness of the cylinder and the welding assembly quality are improved.

The invention belongs to the technical field of gear transmission systems, and particularly discloses a gear meshing optimization method and system based on random progressive iteration and regularization, and the method comprises the following steps: carrying out the data sampling and preliminary fitting based on a gear tooth surface curve model; aiming at the preliminary fitting, setting an adaptive double-layer optimization framework which comprises a first layer of control point updating strategy optimization and a second layer of parameter distribution optimization, constructing an objective function, and realizing adaptive fusion optimization in the same iterative loop to obtain an optimized involute curve and a curved surface; and for the meshing region, introducing second-order difference smoothing, carrying out multi-objective optimization, and outputting a finally fitted NURBS control point P and an optimized parameter mapping weight w. By adopting the technical scheme, on the basis of least square approximation (LSPIA), the adaptive double-layer optimization technology is integrated, and the fitting precision, the fairness and the convergence speed are remarkably improved by jointly optimizing a control point updating strategy and parameter distribution.

This invention discloses a design system for machining the backlash angle of a spline broach based on an involute curve. The system includes a broach original tooth profile parameter input module for inputting basic parameters of the broach spline tooth profile; a new involute parameter calculation module for calculating and outputting new involute parameters of the broach spline teeth based on the basic parameters of the broach spline tooth profile; a gauge bar parameter calculation module for calculating and outputting gauge bar parameters based on the new involute parameters of the broach spline teeth; and a broach tooth profile parameter update output module for outputting tooth profile parameters related to the new involute curve used for the backlash angle of the broach spline teeth from the basic parameters of the broach spline tooth profile, the new involute parameters of the broach spline teeth, and the gauge bar parameters. The new involute curve obtained through this design system allows for direct machining of the backlash angle of the broach spline teeth. This backlash angle machining can be achieved without changing the fixture, while ensuring machining accuracy.

The method comprises: - a step of applying a mechanical brake to fix the sun gear (20) in position, - a step of applying an alternating torque to the rotor (16), - a step of measuring an angular displacement of the rotor (16) with respect to the stator (14), and - a step of converting the measured angular displacement of the rotor (16) into a value of involute spline wear.

The invention provides a dynamic response solving method for a tooth profile modification gear pair. The method comprises the steps of geometric model construction, time-varying meshing stiffness model construction, dynamic differential equation construction, contact judgment, dynamic response solving and the like. According to the dynamic response solving method for the tooth profile modification gear pair, the problem of non-involute contact can be solved, and the contact state of the gear pair can be judged in real time. Besides, the model is a general model for solving the dynamic response of the tooth profile modification gear pair, the problems of low precision of an analytical method, low efficiency of a numerical method, high cost of a test method and the like are considered in the method, and the calculation precision is ensured while the calculation efficiency is considered.

The utility model discloses a ball screw pair anti-rotation mechanism based on involute guide rail pre-embedding, which comprises a valve block, the valve block is connected with one end of an anti-rotation sleeve through a fastener, a nut is sleeved in the anti-rotation sleeve, the outer cylindrical surface of the nut is uniformly provided with at least two sections of grooves, the lower end of an involute guide rail is provided with a square key, and the involute guide rail is embedded in the square key. The square key is in transition fit with the groove, involute grooves matched with the involute guide rails in number are formed in the cylindrical surface of the inner side of the anti-rotation sleeve, the involute grooves are in clearance fit with the upper ends of the involute guide rails, the involute guide rails are used for preventing the nut from rotating, and the nut is connected with the lead screw through threads. The anti-rotation mechanism is stable in dynamic characteristic, low in noise and high in reliability, and the problems of response delay, thermal deformation, cylinder collision and the like of a traditional anti-rotation mechanism are successfully solved through the collaborative design that the involute guide rail is embedded, the petal type flange is adopted and the blind blocking limiting structure is arranged.

This invention belongs to the field of precision gear measurement technology, and relates to a horizontal measurement method, device, and assembly method for a large gear involute template. A V-shaped seat and a ball-end support are used to position the large gear involute template, and the deformation of the template caused by a loading block offsets the tooth profile deviation caused by gravity deformation, resulting in a final measurement of the total tooth profile deviation F on the measured tooth surface. ɑ With a precision of less than 0.05μm, this method is highly accurate, low-cost, and simple to operate. It can make the difference in tooth profile deviation caused by gravity deformation between horizontal and vertical measurements of large gear involute templates less than 0.05μm, ensuring consistency of involute tooth profile deviation under different measurement positions. This is beneficial for the traceability and comparison of involute values ​​and can be used for horizontal measurement of high-precision involute templates, showing good application prospects and promotion value.

The application provides a variable cross-section double-moving plate scroll air compressor and an optimization method thereof. The variable cross-section double-moving plate scroll air compressor comprises two groups of moving and static scroll plates, the two groups of moving and static scroll plates are arranged on two sides of a rack respectively, and the static scroll plate is provided with water-drop-shaped cooling flow channels on the back surface. The objective function of the optimization method is air compressor flow, pressure ratio and the diameter of the circumscribed circle of the scroll tooth. The optimization method adopts a multi-objective genetic algorithm to optimize the involute generating angle, base circle radius and spread angle, effectively reduces the structural size of the scroll plate under the premise of meeting the flow and pressure ratio, and avoids the problems that the prior art is limited by the mathematical characteristics of the type line and it is difficult for people to pre-allocate the weight of the basic parameters.

This invention discloses a wire impact testing device and method based on involute curves, belonging to the technical field of wire impact testing fixtures. It solves the problems of poor versatility, insufficient clamping stability, and difficulty in ensuring coaxiality in existing wire impact testing fixtures. The device includes a base with a one-way ratchet on the top, the upper surface of which is machined with radial anti-slip patterns. An involute winding assembly includes a winding reel. A guide mechanism and a stop assembly are also provided on the base. In this invention, during the impact test, one end of the wire to be tested is wound onto the winding reel, and the other end passes through the guide mechanism and connects to the stop assembly. The pendulum of a pendulum impact testing machine strikes the stop assembly, causing the stop assembly to break the wire to be tested. The winding reel adopts an involute contour design, which can accurately adapt to wires of different diameters and stiffnesses. It also ensures that the impact load is transmitted along the wire's axis without stress deviation, reducing test data deviation.

The application discloses a tooth meshing cutter suitable for machining involute inner helical gear with different helix angles, wherein the tooth meshing cutter is provided with tooth along the circumference, the structure of the tooth includes a cutting edge, a relief surface and a rake surface, the cutting edge includes a left side edge, a right side edge and a top edge, wherein the left side edge and the right side edge are left and right involute profile lines on the section of a drum type external spur gear engaged with the inner helical gear part, the top edge is a circular arc in the same plane with the left side edge and the right side edge and tangent to the left side edge and the right side edge, the relief surface is formed by lofting the cutting edge and a series of relief surface construction lines, the relief surface construction lines are connected by the left and right involute profile lines on the section of the drum type external spur gear with gradually decreasing diameters and the circular arcs tangent to the left and right involute profile lines, and the rake surface is a free curved surface capable of forming a cutting rake angle and is fitted by the cutting edge and the series of relief surface construction lines. The tooth meshing cutter can be used to machine workpieces with different helix angles and greatly reduce the production cost.

The invention discloses a thin-wall full ball bearing steel ball precise filling device based on involute track guidance, relates to the technical field of bearing assembly, and aims to solve the problem that a traditional steel ball filling mode of a thin-wall full ball bearing is difficult to smoothly fill due to stress deformation of a ferrule and extrusion and stacking of steel balls. The feeding mechanism is arranged, the guide channel is arranged along the involute track, impact-free and constant-speed stable feeding of steel balls is achieved by means of the structural characteristics of the feeding mechanism, the ball distribution rhythm is linked, the positioning precision is matched, and the problem that a ferrule is stressed and deformed in traditional guiding is solved; and meanwhile, the tangential pushing assembly is connected with an involute feeding track, precise filling of the steel balls is achieved through combination of tangential flexible pressing-in and lower pressing top concave hole limiting, an air cylinder is matched to drive a pushing plate to stretch out and draw back to complete automatic circulation, the high-precision characteristic of the previous procedure is achieved, and the precision, continuity and stability of filling operation are improved in an all-around mode.

This invention provides a machining method for obtaining uniform surface machining accuracy of a variable pitch screw rotor, comprising the following steps: 1) Dividing the end face profile of the rotor into an involute, addendum circle, epicycloid, and dedendum circle; 2) Dividing one of the involute, addendum circle, epicycloid, and dedendum circle into N equal segments, with the connection point between each segment being the tool point; the line connecting the tool point and the origin is the extreme diameter L, and the angle between the extreme diameter L and the coordinate axis is θ; 3) For each toolpath, the tool point is used as the entry point, and the workpiece is rotated by an angle θ so that the extreme diameter is parallel to the coordinate axis; 4) The tool rotates along a direction parallel to the coordinate axis from one end of the workpiece to the other end; 5) After the tool is lifted to the outside of the workpiece, it moves to the cutting start end, and steps 1-4 are repeated until one of the involute, addendum circle, epicycloid, and dedendum circle is machined; 6) Steps 1-5 are repeated until all the involute, addendum circle, epicycloid, and dedendum circle are machined.

The invention discloses a point cloud processing method of a line structured light measurement system facing an electric drive gear, and belongs to the technical field of gear detection and optical measurement. The method comprises the steps that a system is initialized, and a multi-coordinate system conversion relation is established; acquiring original point clouds of the tooth surface and unifying coordinates; analyzing and mapping the three-dimensional point cloud according to the gear geometric model and reducing the dimension to a two-dimensional tooth profile plane; noise points are removed in the two-dimensional plane based on involute fitting and self-adaptive threshold value recognition; and solving an optimal transformation parameter by adopting an iterative optimization algorithm by taking a minimum point to a theoretical tooth surface normal distance as a target so as to realize high-precision registration of the de-noising point cloud and the theoretical model. According to the method, the specific noise in the gear tooth surface point cloud can be removed in a targeted manner, the real tooth shape is effectively protected, the method has the advantages of being accurate in denoising, stable in registration, high in engineering practicability and the like, and the precision and reliability of electric drive gear line structure light detection are remarkably improved.

The invention discloses an involute cylindrical gear pair transmission design method based on a displacement coefficient, which comprises the following steps of: starting from a backlash-free meshing equation, borrowing parameters which influence bearing capacity, transmission stability and addendum strength, and taking addendum thickness and coincidence degree which are suitable for transmission quality index dimensions of different forms of gears as a path; according to the method, a displacement coefficient adaptability rapid solving method corresponding to zero transmission, positive displacement transmission and negative displacement transmission quality indexes is analyzed, summarized and summarized, so that the confusion of illustration and table look-up in the existing gear transmission design is solved, the defects of traditional experience evaluation, experience analysis and the like are overcome, and in the cylindrical gear pair transmission design process, the design efficiency is improved. The required displacement coefficient can be reasonably solved according to the use requirements such as stability and strength, and the operation difficulty of designers is reduced.

The application provides a flexible processing system for involute enveloping torus worm gear surfaces, which comprises a mounting base, a first chain wheel, a second chain wheel, a third chain wheel and a chain processing tool; the first chain wheel, the second chain wheel and the third chain wheel are arranged on the mounting base and each chain wheel can rotate around its own axis; the axis of the first chain wheel is parallel to the axis of the second chain wheel, and the angle between the axis of the second chain wheel and the axis of the third chain wheel is θ; the chain processing tool is arranged in tension among the three chain wheels and moves with the three chain wheels when the three chain wheels rotate; the application can realize the precision processing of the enveloping torus worm, and effectively improve the processing efficiency and the processing precision.

The high-precision low-noise harmonic reducer comprises a wave generator, a flexible gear and a rigid gear, the wave generator is embedded into the flexible gear and used for driving the flexible gear to generate elastic deformation, and the flexible gear and the rigid gear are in meshing transmission; the wave generator comprises a cam and a flexible bearing arranged on the cam in a sleeving mode, the cam profile of the cam is a cosine cam profile, the flexible bearing is of a four-point contact ball bearing structure, and the flexible bearing is in interference fit with the cam and the flexible gear; a gear ring of the flexible gear is of an involute tooth profile structure, and a correspondingly meshed rigid gear tooth ring is of a conjugate tooth profile conjugate with the involute tooth profile. Through accurate matching of a specific parameter involute tooth profile of the flexible gear and a conjugate tooth profile of the rigid gear, meshing precision and stability are remarkably improved; the first-order derivative and the second-order derivative of the cosine cam contour are continuous, so that the deformation speed and the acceleration of the flexible gear are stably changed, sudden impact is avoided, and the operation noise is greatly reduced; and flexible gear carburizing and quenching, rigid gear hardening and tempering and cam nitriding treatment are further carried out, and the deformation resistance can be improved.

This invention discloses a high-speed machining toolpath generation method based on the involute principle, belonging to the field of computer-aided manufacturing technology. The method includes: dividing the workpiece graphic into partitions, determining the center and radius of each partition; determining the involute base circle radius and toolpath phase angle based on the selected tool radius and cutting thickness, thereby obtaining the range of values ​​for the involute development angle; constructing an involute toolpath mathematical model based on the obtained base circle radius, toolpath phase angle, and development angle; and obtaining the set of coordinate points of the involute trajectory that completely covers the region based on this mathematical model, thus obtaining the high-speed machining toolpath. This invention, based on the involute principle, avoids sharp corners in traditional paths, reduces machine tool vibration and frequent acceleration / deceleration, and ensures equal removal rate through a constant normal distance, effectively improving machining efficiency and extending tool life. It has advantages such as simple operation, strong compatibility, and high promotional value.

The invention discloses a method for manufacturing a gear with a directionally limited main bearing tooth surface. The method comprises the following steps of: cutting a metal blank into a plurality of independent cake-shaped blanks through a cutting or sawing process; performing preprocessing operation on each cake-shaped blank to form a primary outer diameter, an axial end face and a central hole used for being mounted on a core shaft; the cake-shaped blanks are fixed to a core shaft structure, and the multiple cake-shaped blanks are fixed to a core shaft body; the fixed cake-shaped blank is subjected to gear hobbing operation through a hobbing cutter, and gear teeth are generated according to the standard involute tooth shape; after gear hobbing operation is completed, the gear and the mandrel structure are moved out of the gear hobbing station and transferred to a post-processing station; in the post-processing stage, the gear is subjected to angle indexing relative to the directional reference on the mandrel or the special indexing fixture; the orientation reference corresponds to a preset torque direction in actual use of the gear, and one tooth surface of each gear tooth is defined as a main bearing tooth surface; based on the angular indexing, a selective finish machining operation is performed on the primary bearing tooth surface.

The invention belongs to the field of mechanical engineering, particularly relates to an involute gear design system adopting a rack with a chamfering blade, and aims to solve the problems of large meshing impact, high noise and tooth surface fatigue damage of gears under high speed and heavy load. The system comprises a tooth profile generation unit, a chamfer mapping unit, a meshing simulation unit, a stress optimization unit and a process feedback unit, a cutter chamfer is geometrically mapped into a tooth crest transition curved surface, curvature continuous modification is achieved, closed-loop stress optimization and manufacturing error compensation are combined, the transmission stability is improved, and the fatigue life is prolonged. By applying the system, noise and micro-pitting risks can be remarkably reduced, and the service cycle of the gear is prolonged.

The utility model belongs to the technical field of the sizing machine coupling, especially improve automatic coupling of sizing machine, including output shaft, the outer wall of output shaft is sleeved and has the spline head, the outer wall bolt connection of spline head has the gland, the connecting part of gland and spline head is inlayed and has the internal spline sleeve, the inner wall of internal spline sleeve is inlayed and has the top plate, the connecting part of top plate and output shaft is provided with spring, the cooperation of output shaft and spline head adopts the interference fit, and the interference amount is fifteen to eighteen silk, the internal spline sleeve and the gland adopt the involute spline and slide, and the modulus adopts eight, can ensure that the large torque that can bear when the rack reduces the steel pipe is produced, can play the very good centering effect when adopting the involute spline to the rack connection, and the service life is more than three times of the past.