Translational motion helical tooth trace bevel gear machining device based on angular position table

Abstract

The utility model discloses a translational helical tooth line bevel gear machining device based on an angular table, which comprises a machining frame rotationally connected with a vertically arranged connecting shaft, and is characterized in that the connecting shaft is connected with a base plate, the upper end of the base plate is a concave arc surface, the base plate is connected with the angular table just through the arc surface in a sliding manner, and the angular table is fixedly connected with the base plate. A gear blank index plate is fixedly connected to the upper side of the angular position table, a gear blank rotating table used for being connected with a gear blank to be machined is rotationally connected to the gear blank index plate, a cutter head motor base is rotationally connected to the portion, above the gear blank rotating table, of the machining frame, a cutter head is rotationally connected to the cutter head motor base, a plurality of installation grooves are distributed in the cutter head, and cutter bars are installed on the cutter head through the installation grooves. Blades are fixedly connected to the lower portion of the cutter bar, the installation tracks of the blades are arranged in a spiral line mode, and the spiral line pitch is the same as the tooth blank pitch. According to the utility model, full-tooth-width continuous machining of the tooth groove can be realized, the translational helical tooth trace bevel gear is machined, and the machining efficiency of the bevel gear is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bevel gear processing, in particular to a translational spiral tooth line bevel gear processing device based on an angular table. Background Art

[0002] Bevel gear transmission is a relatively complex type of intersecting axis transmission. Spiral bevel gears, with their advantages of high load-bearing capacity, noise and vibration reduction, excellent lubrication, and long life, are widely used in various fields, including the automotive industry, aerospace, power engineering, and mechanical engineering. However, current bevel gear machining methods include disc-by-tooth milling, which requires tooth-by-tooth machining and is inefficient. While continuous indexing is more efficient, its accuracy is affected by the precision of the multiple blades, making it difficult to guarantee precision. Utility Model Content

[0003] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and in the abstract and title of the utility model to avoid obscuring the purpose of this section, the abstract and the title of the utility model, and such simplifications or omissions shall not 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 bevel gears, the present utility model is proposed.

[0005] Therefore, the purpose of the present invention is to provide a translational spiral tooth line bevel gear processing device based on an angular table, which can realize the processing of bevel gears. By processing all tooth grooves with multiple blades in fixed positions, the pitch error of the bevel gear can be reduced and the processing efficiency can be improved.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions: a translational spiral tooth bevel gear processing device based on an angular table, comprising a processing frame, which is rotatably connected to a vertically arranged connecting shaft, characterized in that: a chassis is connected to the connecting shaft, the upper end of the chassis is a concave arc surface, and the chassis is just slidably connected to the angular table via the arc surface, the upper side of the angular table is fixedly connected to a gear blank dividing plate, the gear blank dividing plate is rotatably connected to a gear blank rotating table for connecting the gear blank to be processed, the processing frame above the gear blank rotating table is rotatably connected to a cutter disc motor seat, the cutter disc motor seat is rotatably connected to a cutter disc, and a plurality of mounting slots are arranged on the cutter disc, and a tool rod is installed on the cutter disc through the mounting slot, and a blade is fixedly connected to the lower part of the tool rod, and the installation trajectories of the plurality of blades are arranged in a spiral line, and the pitch of the spiral line is the same as the pitch of the gear blank.

[0007] As a preferred solution of the translational spiral tooth line bevel gear processing device based on the angular positioning table in the utility model, wherein: a plurality of screw holes are opened on the cutter disc on one side in the radial direction of the mounting groove, a plurality of connecting holes corresponding to the screw holes are opened on the upper part of the cutter rod, and a connecting groove for facilitating the installation of bolts is provided on the cutter disc on the side away from the mounting groove in the axial direction of the screw hole, and the bolts are screwed into the screw holes and the connecting holes in sequence to fix the cutter rod to the cutter disc.

[0008] As an optimal solution of the translational spiral tooth line bevel gear processing device based on the angular positioning table in the utility model, wherein: a driving motor is fixedly connected to the chassis, a worm arranged horizontally in the front and rear directions is connected to the driving motor, and a plurality of worm teeth that can engage with the worm are arranged at the downward end of the angular positioning table.

[0009] Compared with the prior art, the utility model has the following technical effects: a plurality of blades are arranged on the cutter disc according to a spiral line, and the blades are diamond-shaped blades made of carbide steel. The bevel gear is processed by rotating the cutter disc. During processing, the motion relationship of the tooth blank indexing one tooth is ensured when the cutter disc rotates one circle. Therefore, when the cutter disc rotates one circle, the plurality of blades sequentially process the same tooth groove. When the cutter disc rotates a second circle, the blades sequentially process the next tooth groove, thereby realizing continuous processing of the entire tooth width of the tooth groove and improving the processing efficiency of the bevel gear. By processing all the tooth grooves with a plurality of blades at fixed positions, the tooth pitch error of the bevel gear can be reduced. The utility model can be applied to the work of processing bevel gears. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] 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 those skilled in the art, other drawings can be obtained based on these drawings without inventive work. Among them:

[0011] Figure 1 The three-dimensional structure of the utility model Figure 1 .

[0012] Figure 2 for Figure 1 A partial enlarged view of point A in the middle.

[0013] Figure 3 The three-dimensional structure of the utility model Figure 2 .

[0014] Figure 4 This is a local enlarged view of point B in 3.

[0015] Figure 5 This is a schematic diagram of the installation position during gear blank processing.

[0016] Figure 6This is a top view of the cutter bar installed on the cutter disc in the utility model.

[0017] Figure 7 This is the principle diagram for solving the tooth line in this utility model.

[0018] Figure 8 This is a schematic diagram of the structural principle of the utility model in the initial position before processing.

[0019] Figure 9 This is a schematic diagram of the structural principle after the gear blank is adjusted into position in preparation for processing.

[0020] In the figure, 1 is a linear drive, 2 is a lifting rod, 3 is a lifting platform, 4 is a Y-axis slide, 5 is a virtual forming wheel indexing plate, 6 is a X-axis slide, 7 is a motor seat, 8 is a processing frame, 9 is a support seat, 10 is a chassis, 1001 is an arc surface, 11 is a connecting shaft, 12 is a angular position table, 1201 is a worm gear, 13 is a driving motor, 14 is a gear blank indexing plate, 15 is a gear blank rotating table, 16 is a cutter head, 1601 is a connecting groove, 1602 is a mounting groove, 17 is a tool rod, 18 is a bolt, 19 is a blade, and 20 is a worm gear. DETAILED DESCRIPTION

[0021] 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 with reference to the accompanying drawings.

[0022] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. 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.

[0023] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout 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.

[0024] Example 1

[0025] Reference Figures 1 to 9 , which is the first embodiment of the utility model, provides a translational spiral tooth line bevel gear processing device based on an angular table, which can realize the processing of gear tooth profile and drum shape.

[0026] like Figures 1 to 4The Y-axis slide is fixedly connected to a support base, and the support base is slidably connected to an X-axis slide that can move left and right. The structure for realizing the movement of the X-axis slide, Y-axis slide and lift table is a conventional technology, which is not an improvement point of the present application. The lifting of the lift table is explained as an example. In the present application, a linear drive is fixedly connected to the lower part of the processing frame, and a lifting rod that can perform reciprocating linear motion in the height direction is connected to the linear drive. The lift table is fixedly connected to the upper side of the lifting rod. The structure for realizing the lifting of the lift table can also be other methods, not limited to the method drawn in this embodiment; a virtual generating wheel indexing plate is connected to the X-axis slide, and the virtual generating wheel indexing plate rotates It is connected with a vertically arranged connecting shaft, the connecting shaft is connected to the chassis, the upper end of the chassis is a concave arc surface, and the chassis is just slidably connected to the angular positioning platform via the arc surface, and the upper side of the angular positioning platform is fixedly connected to a gear blank dividing plate, and the gear blank dividing plate is fixedly connected to a gear blank motor, and the gear blank dividing plate is rotatably connected to a gear blank rotary table for connecting the gear blank to be processed, and the gear blank motor and the gear blank rotary table are transmission connected (which is the prior art and is not drawn in this application, and it is not an improvement point of this application), and the processing frame above the gear blank rotary table is rotatably connected to a cutter disc motor seat, and a servo motor connected to the cutter disc is fixedly connected in the cutter disc motor seat, and the cutter disc is rotatably connected to the cutter disc motor seat, and a number of mounting slots are arranged on the cutter disc, and a cutter rod is installed on the cutter disc through the mounting slot, and a blade is fixedly connected to the lower part of the cutter rod, and the installation trajectories of the several blades are arranged in a spiral line, and the pitch of the spiral line is the same as the pitch of the gear blank.

[0027] In order to further facilitate the installation of the tool rod, a number of screw holes are opened on the cutter disc on one side of the radial direction of the installation slot, and a number of connecting holes corresponding to the screw holes are opened on the upper part of the tool rod. A connecting groove for facilitating the installation of bolts is provided on the cutter disc on the side away from the installation slot in the axial direction of the screw hole. The bolts are screwed into the screw holes and the connecting holes in turn to fix the tool rod to the cutter disc.

[0028] When installing the tool rod, insert the upper part of the tool rod into the installation groove, align the connecting hole with the corresponding screw hole, use the bolt to place it in the connecting groove, and screw it into the screw hole and the connecting hole in turn to fix the tool rod on the cutter disc.

[0029] Specifically, a driving motor is fixedly connected to the chassis, and a worm arranged horizontally in the front-rear direction is connected to the driving motor. A plurality of worm teeth that can mesh with the worm are arranged on the downward end of the angle platform.

[0030] Before setting the tool, first adjust the position of the angle table, drive the motor to start, and the worm rotates. The worm drives the angle table to slide along the arc surface through the worm teeth to ensure that the cutter disc plane is tangent to the indexing cone surface of the gear blank, that is, the angle between the cutter disc plane and the straight line where the rotation center of the gear blank is located is the pitch cone angle δ, and the drive motor stops.

[0031] The cutter head feed is controlled by the lifting platform. The chassis is rotatably connected with an angle table. The rotating axis B2 of the angle table passes through the cone top of the bevel gear. When the gear blank is in the initial position, Figure 8 As shown, the rotation axis B1 of the virtual forming wheel indexing plate and the gear blank rotating platform coincides with A and passes through the cone top of the bevel gear (as shown in Figure 5 As shown), during processing, the angular table rotates around the rotation axis B2 to drive the gear blank to rotate to Figure 9 Position shown.

[0032] According to the parameters of the gear blank, the relative position of the gear blank and the cutter disc is adjusted through the X-axis slide, Y-axis slide and lifting platform to achieve tool setting, ensuring that the main tool tip plane is tangent to the tooth root conical surface of the gear blank at the big end tooth root, and ensuring that the circular trajectory formed by the rotation of the main tool center and the tangent angle of the big end tooth root circle are γ; after tool setting, the tooth groove cutting process begins, and the servo motor drives the cutter disc according to the speed ω T Rotation, the gear blank motor drives the gear blank rotating table and the gear blank to rotate, ensuring the speed of the cutter head ω T The speed ratio of the gear blank is the number of teeth Z of the gear to be processed. During processing, the feeding is achieved through the lifting platform. The gear blank is fed once every time it rotates one circle until the deep cutting processing of all the tooth grooves is completed, and then the gear blank is directly expanded.

[0033] Generating is divided into left tooth surface generating and right tooth surface generating. Generating is achieved by simulating the meshing rotation of the virtual forming wheel formed by the tooth blank and the tool (the straight line where the rotation center of the virtual forming wheel passes through the cone top of the bevel gear). The rotation of the tooth blank is achieved by adding an additional speed on the basis of the original speed. ω a The rotation of the virtual shaping wheel is realized by the virtual shaping wheel indexing plate driving the gear blank to rotate relative to the virtual shaping wheel, and the speed is ω m ,ensure ω m / ω a = cosδ, δ is the pitch angle of the bevel gear being processed, so that the tooth blank and the virtual crown-shaped wheel are relatively meshed and transmitted, and the left and right tooth surfaces are continuously developed. After the left (right) tooth surface is developed, press ω a 、 ω m After turning back to the gear blank and the virtual forming wheel indexing plate, the right (left) tooth surface is continued to be developed.

[0034] Solve the tooth line equation of the bevel gear in this utility model, such as Figure 5 As shown, the cutter head coordinate system is established with the cutter head rotation center as the coordinate origin. XT O T Y T ,That X T The intersection of the circular trajectory formed by the axis rotating through the center of the main tool and the tangent line of the root circle of the large end of the gear blank O G ,by O G As the coordinate origin, establish the gear blank coordinate system X G O G Y G ,That X T The axis and the tangent line of the tooth root circle at the large end of the gear blank are collinear. O G After the generatrix is ​​expanded, it can be seen that the cone top of the bevel gear O B exist Y G Any point on the center trajectory of the main tool tip P T In the coordinate system X T O T Y T The parametric coordinate equations in are: ,in θ for point P T The position angle, R T The main tool installation radius. During the machining process, the cutter head and the gear blank rotate at a constant speed ratio. That is, each point on the arc rotates (translates) a corresponding angle around a certain point, forming a translational helix. Therefore, the processed bevel gear is named a translational helical tooth line bevel gear.

[0035] Through this application, continuous processing of the entire tooth width of the tooth groove can be achieved, and a horizontal spiral tooth line bevel gear can be processed, thereby improving the processing efficiency of the bevel gear; by processing all the tooth grooves with multiple blades in a fixed position, the pitch error of the bevel gear can be reduced.

[0036] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. 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, and all of these should be included in the scope of the claims of the present invention.

Claims

1. A translational spiral bevel gear processing device based on an angle table (12), comprising a processing frame (8), the processing frame (8) being rotatably connected to a vertically arranged connecting shaft (11), characterized in that: The connecting shaft (11) is connected to a chassis (10), the upper end of the chassis (10) is a concave arc surface (1001), and the chassis (10) is slidably connected to an angle table (12) via the arc surface (1001). A gear blank indexing plate (14) is fixedly connected to the upper side of the angle table (12), and a gear blank rotary table (15) for connecting a gear blank to be processed is rotatably connected to the gear blank indexing plate (14). A processing frame above the gear blank rotary table (15) is provided. (8) is rotatably connected to a cutter disc (16) motor seat (7), and the cutter disc (16) motor seat (7) is rotatably connected to a cutter disc (16), and a plurality of mounting grooves (1602) are arranged on the cutter disc (16), and a cutter rod (17) is mounted on the cutter disc (16) through the mounting groove (1602), and a blade (19) is fixedly connected to the lower part of the cutter rod (17), and the mounting tracks of the plurality of blades (19) are arranged in a spiral line, and the pitch of the spiral line is the same as the pitch of the tooth blank.

2. The device for machining a bevel gear with a translational spiral tooth line based on an angular positioning table (12) as claimed in claim 1, characterized in that: A plurality of screw holes are provided on the cutter disc (16) on one side of the installation slot (1602) in the radial direction, a plurality of connecting holes corresponding to the screw holes are provided on the upper part of the cutter rod (17), and a connecting groove (1601) for facilitating the installation of a bolt (18) is provided on the cutter disc (16) on the side away from the installation slot (1602) in the axial direction of the screw hole, and the bolt (18) is screwed into the screw hole and the connecting hole in sequence to fix the cutter rod (17) on the cutter disc (16).

3. The translational spiral bevel gear processing device based on the angular positioning table (12) according to claim 1 is characterized in that: A driving motor (13) is fixedly connected to the chassis (10), and a worm (20) arranged horizontally in the front-back direction is connected to the driving motor (13). A plurality of worm teeth (1201) capable of meshing with the worm (20) are arranged at a downward end of the angular platform (12).

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