A spiral tooth line cylindrical helical gear processing device and processing method thereof

Abstract

The invention discloses a device for processing a spiral-toothed cylindrical bevel gear, comprising a processing assembly, the processing assembly comprising a transmission box connected to the upper side of a base, the transmission box being rotatably connected to a cutter disc, a plurality of cutter rods being arranged on the cutter disc, and a cutting tool being connected to the end of the cutter rod away from the cutter disc; a processing connection assembly, the processing connection assembly comprising a base, a connecting platform which can slide toward or away from the direction of the cutter disc being slidably connected to the base, a processing connection seat which can slide along the length direction of the connecting platform being connected to the connecting platform, an angle adjustment support seat being fixedly connected to the processing connection seat, the upper surface of the angle adjustment support seat being in an arc shape, an angle position platform which can slide just along its upper surface being connected to the angle adjustment support seat, a gear installation box being fixedly connected to the angle position platform, and a connecting shaft for installing a gear blank to be processed being rotatably connected to the upper part of the gear installation box; the use of the invention can directly process a spiral-toothed cylindrical bevel gear.

Description

Technical Field

[0001] The invention relates to the technical field of helical gear processing, in particular to a helical tooth line cylindrical helical gear processing device and a processing method thereof. Background Art

[0002] Cylindrical gear transmission is the most widely used power transmission mechanism. Helical cylindrical gears are widely used in high-speed and heavy-load situations due to their smooth transmission, low impact, vibration and noise. However, they have problems such as eccentric loading and stress concentration at the root of the gear end face when meshing. When helical cylindrical helical gears are meshed, the contact surface is a combination of two curved surfaces, which can effectively reduce the eccentric loading and stress concentration at the root of the gear end face caused by machining and installation errors, improve the fatigue strength of the gear, and increase the service life. However, the current processing method of helical cylindrical helical gears is imperfect, resulting in low production efficiency, high cost, and low machining surface accuracy of such helical gears. Summary of the invention

[0003] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0004] In view of the above and / or existing problems in the processing of existing helical gears, the present invention is proposed.

[0005] Therefore, an object of the present invention is to provide a helical tooth line cylindrical helical gear processing device, which can directly process the helical tooth line cylindrical helical gear.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a spiral tooth line cylindrical bevel gear processing device, comprising a processing assembly, the processing assembly comprising a transmission box connected to the upper side of a base, a cutter disc rotatably connected to the transmission box, a plurality of tool rods arranged on the cutter disc, and a cutting tool for cutting a gear blank to be processed connected to one end of the tool rod away from the cutter disc;

[0007] A processing connection component, which includes a base, a connecting platform that can slide toward or away from the direction of the cutter disc is slidably connected to the base, a processing connection seat that can slide along the length direction of the connecting platform is connected to the connecting platform, an angle adjustment support seat is fixedly connected to the upper side of the processing connection seat, the upper surface of the angle adjustment support seat is arc-shaped, and the angle adjustment support seat is connected to an angle table that can just slide along its upper surface, a gear mounting box is fixedly connected to the angle table, and the upper part of the gear mounting box is rotatably connected to a connecting shaft for mounting a gear blank to be processed.

[0008] As a preferred solution of the spiral tooth line cylindrical bevel gear processing device of the present invention, wherein: the upward end of the angle adjustment support seat is provided with a plurality of sliding grooves, and the lower part of the angle positioning table is provided with a plurality of sliding parts corresponding to the sliding grooves one by one, and the sliding parts can slide along the corresponding sliding grooves.

[0009] As a preferred solution of the spiral tooth line cylindrical bevel gear processing device of the present invention, wherein: connecting ears are fixed on the left and right ends of the angle positioning table, a worm is rotatably connected between the connecting ears, a rotating handle is fixed on the end of the worm extending out of one of the connecting ears, and a worm wheel cooperating with the worm is provided on the angle adjustment support seat.

[0010] As a preferred embodiment of the spiral tooth line cylindrical helical gear processing device of the present invention, the relative distance between the nth cutter bar and the center point of the cutter disc is R n =R n-1 -π*m / n, to ensure that all tool bars are always on the helical line, m is the gear module, R 1 The value is the initial pitch. The first to nth tool bars are set in sequence with the center of the cutter disc as the origin and in a fixed rotation direction.

[0011] As a preferred solution of the helical tooth line cylindrical helical gear processing device of the present invention, wherein: on the cylindrical surface development diagram of the helical tooth line cylindrical helical gear, the intersection point of the tooth line and the upper end surface of the tooth profile is P, the intersection point of the tooth line and the lower end surface of the tooth profile is Q, and the intersection point P and X D The angle between the axes is γ 1 , let Q and X D The angle between the axes is γ 2 , make an axis β through point P parallel to the center axis of the gear, the angle between the straight line PQ and the β axis is α, and the intersection point of the tooth line and the upper end face of the tooth profile is P(R T ·cosγ 1 ,R T ·sinγ 1 ,0), the intersection point of the tooth line and the lower end surface of the tooth profile is Q(R T ·cosγ 2 ,R T ·sinγ 2 ,0), The tooth line inclination α of the helical gear depends on the angle γ 1 and γ 2 Size, R T is the machining radius of the cutter head, and B is the tooth width of the gear blank.

[0012] A method for machining a helical helical gear with a processing device, wherein the plane where the cutter disc is located is parallel to the pitch plane on the gear blank that is perpendicular to the cutter bar, and the midpoint of the gear blank is taken as the origin coordinate O C , establish the coordinate system SC (O C X C Y C Z C ), the center axis of the tool bar is perpendicular to the X axis of the gear blank C O C Z C ; including the following steps,

[0013] Adjust the angle of the angle table to a suitable position according to the required tooth line inclination α of the helical tooth line cylindrical bevel gear, and fix the angle table to the angle adjustment support seat;

[0014] Control the cutter head at an angular velocity ω D The gear blank rotates clockwise at an angular velocity ω C Rotate around the Zc axis. After the cutter disc goes around a circle, the gear blank rotates one tooth. The connecting platform makes a linear motion feed in the direction of the cutter disc. After the tooth groove cutting depth is completed, it performs the unfolding motion.

[0015] After the initial processing of the gear is completed, the cutting tool reaches the bottom of the processed tooth shape, and the cutter head moves at an angular velocity ω D Rotating clockwise, the gear blank rotates at an angular velocity (ω C +ω′) rotates clockwise and moves linearly along the length direction of the connecting platform at a speed of V′=ω′*R to complete the right tooth surface development processing, thereby realizing continuous development processing. After the complete right tooth surface development processing is completed, the gear blank rotates to the next tooth surface and repeats the above operation; all right tooth surface development processing is completed;

[0016] The gear blank moves at an angular velocity (ω C -ω′) rotates clockwise and moves linearly along the left side of the length direction of the sliding seat at a speed V′=ω′*R, that is, the left tooth surface development processing is completed; so far, a complete left tooth surface development processing is completed, after completion, the gear blank rotates to the next tooth surface and repeats the above operation to complete the left tooth surface development processing, thereby realizing continuous development processing, and after the right and left tooth surfaces are processed, the processed gear is removed;

[0017] Where R is the gear pitch circle radius. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0019] Figure 1 The three-dimensional structure of the present invention Figure 1.

[0020] Figure 2 The three-dimensional structure of the present invention Figure 2 .

[0021] Figure 3 for Figure 2 A partial enlarged view of point A in the middle.

[0022] Figure 4 The three-dimensional structure of the present invention Figure 3 .

[0023] Figure 5 for Figure 4 A partial enlarged view of point B in the middle.

[0024] Figure 6 It is a schematic diagram of the motion relationship of the components of the spiral tooth line cylindrical bevel gear processing device in the present invention.

[0025] Figure 7 The figure is a structural diagram of a helical tooth cylindrical bevel gear processed by the present invention.

[0026] Figure 8 It is the cylindrical expansion diagram of the spiral tooth line cylindrical bevel gear in the present invention.

[0027] Fig. 9 The figure is a spiral distribution diagram of the tool bar for processing the spiral tooth cylindrical bevel gear in the present invention.

[0028] Fig.10 This is a schematic diagram of the processing principle of the helical tooth cylindrical bevel gear in the present invention.

[0029] Fig.11 It is a schematic diagram of the left-developed motion of the helical tooth cylindrical bevel gear in the present invention.

[0030] Fig.12 This is a schematic diagram of the right-hand development motion of the helical tooth cylindrical bevel gear in the present invention.

[0031] In the figure, 100 is a processing connection component, 101 is a processing connection seat, 102 is a base, 103 is a connection platform, 104 is a worm gear, 105 is an angle adjustment support seat, 106 is a worm, 107 is an angle table, 107a is a connection ear, 107b is a sliding part, 108 is a connecting shaft, 109 is a second motor, 110 is a rotating handle, 111 is a gear mounting box, 200 is a processing component, 201 is a transmission box, 202 is a tool rod, 203 is a tool disc, 204 is a first motor, 205 is a cutting tool, and a is a sliding groove. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0033] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0034] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0035] Example 1

[0036] Reference Figures 1 to 9 , which is the first embodiment of the present invention, provides a spiral tooth line cylindrical helical gear processing device, which can directly process spiral tooth line cylindrical helical gears.

[0037] A spiral tooth line cylindrical bevel gear processing device, comprising a processing assembly, the processing assembly comprising a transmission box connected to the upper side of a base, a cutter disc rotatably connected to the transmission box, a plurality of cutter bars arranged on the cutter disc, in this embodiment, four mounting grooves are arranged on the cutter disc, the cutter disc is connected to the cutter bar through the mounting groove, and one end of the cutter bar extending forward from the cutter disc is connected to a cutting tool 205 for cutting a gear blank to be processed;

[0038] A processing connection assembly, the processing connection assembly includes a base, a connecting platform that can slide toward or away from the direction of the cutter disc is slidably connected to the base, a processing connection seat that can slide along the length direction of the connecting platform is connected to the connecting platform, an angle adjustment support seat is fixedly connected to the upper side of the processing connection seat, the upper surface of the angle adjustment support seat is arc-shaped, the angle adjustment support seat is connected to an angle table that can just slide along its upper surface, a gear mounting box is fixedly connected to the angle table, and the upper part of the gear mounting box is rotatably connected to a connecting shaft for mounting a gear blank to be processed (only a schematic diagram is drawn in this application).

[0039] A first motor is fixedly connected to the transmission box, and a structure for realizing transmission connection between the first motor and the cutter disc is provided inside the transmission box; a second motor is fixedly connected to the gear mounting box, and a structure for realizing transmission connection with the connecting shaft is provided inside the gear mounting box; the connecting platform can slide back and forth and the processing connecting seat can slide left and right to realize the structure of its movement. In this application, only a schematic diagram of the sliding function is given, and no specific implementation structure is given. The above structures are all prior arts and are not improvements of the present application, and will not be described in detail here.

[0040] Specifically, a plurality of sliding grooves are opened on the upward end of the angle adjustment support seat, and a plurality of sliding parts corresponding to the sliding grooves are arranged at the lower part of the angle positioning platform, and the sliding parts can slide along the corresponding sliding grooves. Connecting ears are fixed on both ends of the angle positioning platform, and a worm is rotatably connected between the connecting ears. A rotating handle is fixed on one end of the worm extending out of one of the connecting ears, and a worm wheel cooperating with the worm is provided on the angle adjustment support seat.

[0041] When the inclination of the bevel gear needs to be adjusted, the rotating handle is turned, the worm rotates and moves along the worm wheel, and the worm drives the angle table to slide along the upper surface of the angle adjustment support seat. When the inclination is adjusted to a suitable angle, the sliding part is fixedly connected to the angle adjustment support seat with a fixing bolt.

[0042] Specifically, the cutter bar is arranged on the cutter disc in a plane spiral shape, and the polar coordinate equation of the plane spiral is r = R 0 -0.5*m*θ or the parameter equation is (Among them, R 0 represents the initial radius of the helix; m represents the gear module, and θ represents the distance from any point on the helix to the axis X. D The included angle of the cutter head is taken as the origin coordinate O D , establish the coordinate system S D (O D X D Y D Z D ), RD is the radius of the cutter head, and the plane where the front side of the cutter head is located is the plane X D O D Y D , Z D The axis is perpendicular to the cutter disc plane, X D For S D (O D X D Y D Z D ) of the X-axis, the relative distance between the nth tool bar and the center point of the tool disc is R n =R n-1 -π*m / n, ensuring that all tool rods are always on the spiral line. The first to nth tool rods are set in sequence with the center of the cutter disc as the origin and in a fixed rotation direction.

[0043] Specifically, on the cylindrical development diagram of the spiral tooth line cylindrical bevel gear, let the intersection point of the tooth line and the upper end surface of the tooth profile be P, the intersection point of the tooth line and the lower end surface of the tooth profile be Q, and the intersection point P and X D The angle between the axes is γ 1 , let Q and X D The angle between the axes is γ 2 , make an axis β through point P parallel to the center axis of the gear, the angle between the straight line PQ and the β axis is α, and the intersection point of the tooth line and the upper end face of the tooth profile is P(RT ·cosγ 1 ,R T ·sinγ 1 ,0), the intersection point of the tooth line and the lower end surface of the tooth profile is Q(R T ·cosγ 2 ,R T ·sinγ 2 ,0), The tooth line inclination α of the helical gear depends on the angle γ 1 and γ 2 Size, R T is the machining radius of the cutter head, and B is the tooth width of the gear blank.

[0044] The present invention can continuously process spiral tooth line cylindrical bevel gears. When the inclination of the spiral tooth line cylindrical bevel gears needs to be changed, the gear inclination can be changed by adjusting the inclination angle of the diagonal position table, and the numerical relationship between the two can be found for adjustment; the optimal inclination of the spiral tooth line cylindrical bevel gears can be selected according to the operating conditions of different gears; the large cutter disc rotary milling can realize continuous gear cutting during the cutting process, and the processing efficiency is high.

[0045] Example 2

[0046] Reference Figure 10 to Figure 12 , which is the second embodiment of the present invention, provides a method for machining a spiral tooth cylindrical bevel gear using a machining device, which is based on the previous embodiment.

[0047] A method for machining a helical helical gear with a processing device, wherein the plane where the cutter disc is located is parallel to the pitch plane on the gear blank that is perpendicular to the cutter bar, and the midpoint of the gear blank is taken as the origin coordinate O C , establish the coordinate system S C (O C X C Y C Z C ), the center axis of the tool bar is perpendicular to the X axis of the gear blank C O C Z C ;

[0048] The following steps are involved:

[0049] (1) According to the required tooth line inclination α of the helical tooth line cylindrical bevel gear, the angle of the angle table is adjusted to a suitable position, and the angle table is fixedly connected to the angle adjustment support seat;

[0050] (2) Control the cutter head at an angular velocity ω D The gear blank rotates clockwise at an angular velocity ω CRotate around the Zc axis. After the cutter disc goes around a circle, the gear blank rotates one tooth. The connecting platform makes a linear motion feed in the direction of the cutter disc. After the tooth groove cutting depth is completed, it performs the unfolding motion.

[0051] (3) After the initial processing of the gear is completed, the cutting tool 205 reaches the bottom of the processed tooth shape, and the cutter head moves at an angular velocity ω D Rotating clockwise, the gear blank rotates at an angular velocity (ω C +ω′) rotates clockwise and moves linearly along the length direction of the connecting platform at a speed of V′=ω′*R to complete the right tooth surface development processing, thereby realizing continuous development processing. After the complete right tooth surface development processing is completed, the gear blank rotates to the next tooth surface and repeats the above operation; all right tooth surface development processing is completed;

[0052] (4) The gear blank moves at an angular velocity (ω C -ω′) rotates clockwise and moves linearly along the left side of the length direction of the sliding seat at a speed V′=ω′*R, that is, the left tooth surface development processing is completed; so far, a complete left tooth surface development processing is completed, after completion, the gear blank rotates to the next tooth surface and repeats the above operation to complete the left tooth surface development processing, thereby realizing continuous development processing, and after the right and left tooth surfaces are processed, the processed gear is removed;

[0053] Where R is the gear pitch circle radius.

[0054] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A device for processing helical tooth line cylindrical bevel gears, characterized in that: include, A processing assembly, the processing assembly includes a transmission box connected to the upper side of the base, a cutter disc is rotatably connected to the transmission box, a plurality of cutter bars are arranged on the cutter disc, and a cutting tool for cutting the gear blank to be processed is connected to one end of the cutter bar away from the cutter disc; The processing connection component comprises a base, a connecting platform which can slide toward or away from the direction where the cutter disc is located is slidably connected to the base, a processing connection seat which can slide along the length direction of the connecting platform is connected to the connecting platform, an angle adjustment support seat is fixedly connected to the upper side of the processing connection seat, the upper surface of the angle adjustment support seat is arc-shaped, an angle table which can slide just along its upper surface is connected to the angle adjustment support seat, a gear mounting box is fixedly connected to the angle table, and a connecting shaft for mounting a gear blank to be processed is rotatably connected to the upper part of the gear mounting box, a plurality of sliding grooves are opened at the upward end of the angle adjustment support seat, a plurality of sliding parts which correspond to the sliding grooves are arranged at the lower part of the angle table, and the sliding parts can slide just along the corresponding sliding grooves, connecting ears are fixed at both ends of the angle table, a worm is rotatably connected between the connecting ears, a rotating handle is fixed to the end of the worm which extends out of one of the connecting ears, a worm wheel which cooperates with the worm is provided on the angle adjustment support seat, and the relative distance between the nth tool rod and the center point of the cutter disc is R n =R n-1 -π*m / n, ensure that all tool bars are always on the spiral line, m is the gear module, R1 is the initial pitch, the first tool bar to the nth tool bar are set in sequence with the center of the cutter disc as the origin and a fixed rotation direction. On the cylindrical surface development diagram of the spiral tooth line cylindrical bevel gear, the intersection point of the tooth line and the upper end face of the tooth profile is P, the intersection point of the tooth line and the lower end face of the tooth profile is Q, and the intersection point P and X D The angle between the Q point and the X axis is γ1. D The angle between the axes is γ2. Make an axis β through point P that is parallel to the center axis of the gear. The angle between the straight line PQ and the β axis is α. Let the intersection of the tooth line and the upper end face of the tooth profile be P(R T ·cosγ1,R T sinγ1,0), the intersection point of the tooth line and the lower end surface of the tooth profile is Q(R T ·cosγ2,R T ·sinγ2,0), The tooth line inclination α of the helical gear depends on the size of the included angles γ1 and γ2, R T is the machining radius of the cutter head, and B is the tooth width of the gear blank.

2. A method for machining a helical toothed cylindrical helical gear using the helical toothed cylindrical helical gear machining device according to claim 1, characterized in that: The plane where the cutter disc is located is parallel to the pitch plane on the gear blank that is perpendicular to the cutter bar, and the midpoint of the gear blank is taken as the origin coordinate O C , establish the coordinate system S C (O C X C Y C Z C ), the center axis of the tool bar is perpendicular to the X axis of the gear blank C O C Z C ; include The following steps, (1) According to the required tooth line inclination α of the helical tooth line cylindrical bevel gear, the angle of the angle table is adjusted to a suitable position, and the angle table is fixedly connected to the angle adjustment support seat; (2) Control the cutter head at an angular velocity ω D The gear blank rotates clockwise at an angular velocity ω C Rotate around the Zc axis. After the cutter disc goes around a circle, the gear blank rotates one tooth. The connecting platform makes a linear motion feed in the direction of the cutter disc. After the tooth groove cutting depth is completed, it performs the unfolding motion. (3) After the initial processing of the gear is completed, the cutting tool reaches the bottom of the processed tooth shape, and the cutter head moves at an angular velocity ω D Rotating clockwise, the gear blank rotates at an angular velocity (ω C +ω′) rotates clockwise and moves linearly along the length direction of the connecting platform at a speed V′=ω′*R to complete the right tooth surface development processing, thereby realizing continuous development processing; after the complete right tooth surface development processing is completed, the gear blank rotates to the next tooth surface and repeats step (3); until all the right tooth surface development processing is completed; (4) The gear blank moves at an angular velocity (ω C -ω′) rotates clockwise and moves linearly along the left side of the length direction of the sliding seat at a speed V′=ω′*R, thus completing the left tooth surface development process; thus, a complete left tooth surface development process is completed; after completion, the gear blank rotates to the next tooth surface and repeats step (4) until the left tooth surface development process is completed, thereby realizing continuous development process, and after the right and left tooth surfaces are processed, the processed gear is removed; Where R is the gear pitch circle radius.

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