Involute spline cold roll structure

Abstract

This invention discloses a cold rolling structure for involute splines, comprising a frame, a feeding device, a flyboard, and a stop. The feeding device is installed at one end of the frame. The flyboard is rotatably mounted on the frame and located on one side of the workpiece to be processed. The centerline of the flyboard is vertically aligned, and the flyboard is driven to rotate relative to the frame by a flyboard drive motor. One or more rollers are evenly arranged circumferentially along the edge of the flyboard. These rollers are used to extrude spline grooves onto the workpiece during operation. The stop is mounted on the frame and, during operation, abuts the workpiece from the side away from the flyboard, preventing the workpiece from bending or deforming away from the flyboard when the flyboard extrudes the workpiece. This invention is applicable to the processing of spline shafts with both odd and even keyways. While the rollers extrude keyways onto the workpiece, the stop blocks the other side of the workpiece, preventing bending deformation due to the rollers' extrusion and ensuring the quality of the processed spline shaft.

Description

Technical Field

[0001] This invention relates to a cold rolling structure for involute splines, belonging to the technical field of machining equipment. Background Technology

[0002] Splined shafts are one of the more commonly used transmission tools in the mechanical field. They are usually processed by milling or extrusion. Extrusion is more widely used than milling due to its higher efficiency. In the existing technology, extrusion first processes a groove on each side of the workpiece, and then rotates the workpiece at an angle to process two more grooves. When processing splined shafts with this structure, the rollers extrude on the workpiece while the adjacent grooves are being processed, causing the teeth of the groove being processed and its adjacent grooves to be squeezed and deformed towards the already processed grooves. As a result, the teeth of the splined shaft are biased to one side, and the overall quality of the splined shaft is relatively low.

[0003] To address the aforementioned issues, Chinese invention patent application CN114798785A provides a device for cold rolling and forming an extra-long splined shaft, comprising a frame, a main shaft, flywheels, and a vertical support plate. The main shaft is mounted on the frame. Two flywheels are rotatably mounted on the frame, symmetrically positioned on the left and right sides of the main shaft's centerline. Multiple rollers are evenly distributed along the circumferential direction at the edges of the flywheels, and these rollers are used to extrude spline grooves onto the workpiece during operation. The vertical support plate is positioned on the frame at the end furthest from the main shaft. A limiting through-hole is formed on both sides of the vertical support plate, with the centerline of the limiting through-hole aligned with the centerline of the main shaft. A spring sleeve is installed within the limiting through-hole via a bearing. The end of the workpiece furthest from the main shaft engages with the spring sleeve, which prevents radial oscillation of the workpiece end.

[0004] The aforementioned patent discloses a cold-rolling device for ultra-long splined shafts, in which flywheels are symmetrically arranged on both sides of the splined shaft. The striking wheels on the flywheels extrude spline grooves onto the workpiece. Because the flywheels and striking wheels are symmetrically distributed on both sides of the workpiece, the force on both sides of the workpiece is relatively uniform. When the striking wheels on both sides extrude the spline grooves onto the workpiece, the workpiece will not bend or deform in the horizontal direction. However, since the workpiece rotates by one angle to process two keyways, the aforementioned device is only suitable for processing splined shafts with an even number of keyways. It is not suitable for splined shafts with an odd number of keyways. If one flywheel is removed from the device disclosed in the aforementioned patent, when the striking wheel on the other flywheel extrudes the keyway onto the workpiece, the workpiece will inevitably bend and deform away from the striking wheel because only one side is subjected to the extrusion force, thus affecting the quality of the processed splined shaft. The device disclosed in the aforementioned patent application is not suitable for processing splined shafts with an odd number of keyways, and its versatility is poor. On the other hand, in the device disclosed in the above patent, the flywheel cannot move horizontally except for rotating, so its steering wheel cannot move in the horizontal direction either. Therefore, the device disclosed in the above patent is only suitable for processing spline shafts of one diameter, and the range of spline shafts that can be processed is relatively small. Summary of the Invention

[0005] The purpose of this invention is to provide a cold rolling structure for involute splines, which solves the technical defects of existing cold rolling devices for ultra-long spline shafts. These devices symmetrically set up fly discs on both sides and simultaneously machine two keyways symmetrically from both sides of the workpiece. This is only suitable for processing spline shafts with an even number of keyways. Furthermore, if only one fly disc is used to machine the keyway from one side of the workpiece, the workpiece is easily bent and deformed by the pressure of the rolling wheel, making it unsuitable for processing spline shafts with an odd number of keyways.

[0006] To solve the above problems, the technical solution adopted by the present invention is: an involute spline cold rolling structure, including a frame, a feeding device, a flyboard, and a stop; the feeding device is installed at one end of the frame, and in use, the feeding device pushes the workpiece to be processed into an involute spline forward and drives the workpiece to be processed to rotate; the flyboard is rotatably set on the frame and located on one side of the workpiece to be processed, the center line of the flyboard is set in the vertical direction and the flyboard is driven by the flyboard drive motor to rotate relative to the frame, and one or more rollers are evenly arranged along the circumferential direction at the edge of the flyboard, the center line direction of the rollers is parallel to the center line direction of the flyboard, and the rollers are used to extrude spline grooves on the workpiece in use; the stop is set on the frame, and the stop and the flyboard are respectively located on both sides of the workpiece to be processed, and the stop is used to abut against the workpiece from the side away from the flyboard in use, preventing the workpiece from bending and deforming in the direction away from the flyboard when the flyboard extrudes the workpiece. This invention uses only one fly disc. When machining a splined shaft, one keyway is machined at a time. Then, based on the angle between two adjacent keyways on the splined shaft, the workpiece is rotated to machine another keyway. This makes it suitable for machining splined shafts with both odd and even keyways. While the roller is pressing the keyway into the workpiece, the other side of the workpiece is blocked by a stop to prevent the workpiece from bending due to the roller's pressure, thus ensuring the quality of the machined splined shaft.

[0007] As a further improvement of the present invention, it also includes a flying disc mounting frame and a mounting frame drive motor. The flying disc mounting frame is mounted on the machine frame and forms a horizontal sliding pair with the machine frame. Both ends of the flying disc's rotation shaft are rotatably connected to the flying disc mounting frame. The flying disc drive motor is mounted on the flying disc mounting frame, and the output shaft of the flying disc drive motor is connected to the rotation shaft of the flying disc to drive the flying disc to rotate. The mounting frame drive motor is mounted on the machine frame and is used to drive the flying disc mounting frame to move toward or away from the workpiece to be processed. The flying disc moves synchronously with the movement of the flying disc mounting frame, and is used to adjust the position of the turning wheel according to the diameter of the involute spline to be processed. The present invention sets up a flying disc mounting frame that moves relative to the machine frame. Therefore, the present invention can adjust the position of the flying disc and the turning wheel according to the diameter of the spline shaft to be processed, making the present invention applicable to the processing of spline shafts of different diameters, improving the versatility of the present invention. In the present invention, the mounting frame drive motor drives the flying disc mounting frame to move, so that the flying disc mounted on the flying disc mounting frame and the flying disc drive motor move synchronously.

[0008] As a further improvement of the present invention, the bottom of the stop and the frame form a horizontal sliding pair; a stop drive motor is provided on the frame, which drives the stop to move toward or away from the workpiece to be processed, and is used to adjust the position of the stop according to the diameter of the involute spline to be processed. In the present invention, the stop slides on the frame, and the position of the stop can be adjusted according to the diameter of the spline shaft to be processed. When processing a spline shaft with a larger diameter, the stop is moved away from the center line of the workpiece, while when processing a spline shaft with a smaller diameter, the stop is moved toward the center line of the workpiece, so that the stop abuts against the workpiece when processing the spline shaft.

[0009] As a further improvement of the present invention, an arc groove is provided on the side of the stop facing the workpiece to be processed. In use, the workpiece rests against the arc groove. By providing an arc groove on the stop, the present invention can reduce the width of the stop and relatively increase the contact area between the workpiece and the stop, thereby reducing the damage to the workpiece surface caused by the squeezing between the stop and the workpiece.

[0010] As a further improvement of the present invention, a circular retaining ring is rotatably disposed within the arc groove. The retaining ring rotates relative to the stop frame within the arc groove as the workpiece rotates. The present invention incorporates a retaining ring, and the relative rotation between the retaining ring and the stop frame ensures that the retaining ring rotates along with the workpiece, reducing the resistance of the stop frame to the workpiece's rotation and further minimizing damage to the workpiece surface.

[0011] As a further improvement of the present invention, the retaining ring is provided with an internal spline, which is used to engage with the machined involute spline in the service state. The present invention provides an internal spline on the retaining ring, wherein the retainer is located on the side away from the feeding device, so that the portion already machined into a spline engages with the internal spline on the retaining ring, thereby further reducing the damage caused to the workpiece by the retaining ring.

[0012] As a further improvement of the present invention, the centerline of the arc groove is offset to one side of the retaining frame, and a needle roller is provided at the bottom of the arc groove. The outer cylindrical surface of the retaining ring abuts against the needle roller, and arc-shaped retaining rings are provided on both sides of the arc groove to prevent the retaining ring from moving axially during use. The present invention reduces the resistance of the retaining frame to the rotation of the retaining ring by providing a needle roller in the arc groove, and the retaining rings in the present invention are used to axially limit the rotation of the retaining ring, making the rotation of the retaining ring more stable.

[0013] As a further improvement of the present invention, a needle roller guard plate is provided inside the arc groove to fix the needle roller. The needle roller guard plate in the present invention limits the movement of the needle roller, which facilitates the installation of the needle roller and makes it more conducive to the rolling of the needle roller inside the arc groove.

[0014] As a further improvement of the present invention, a fixing sleeve is fixedly installed inside the arc groove, and the retaining ring is rotatably mounted inside the fixing sleeve using a bearing. In use, the retaining ring rotates relative to the fixing sleeve as the workpiece rotates. The fixing sleeve in this invention facilitates the installation and positioning of the retaining ring.

[0015] As a further improvement of the present invention, the arc groove is a circular hole extending through both sides of the stop frame along the axial direction of the workpiece to be processed, and the retaining ring is rotatably mounted in the circular hole using a bearing. The present invention uses a circular hole instead of an arc groove, which facilitates the manufacturing of the stop frame and the installation of the retaining ring.

[0016] In summary, the beneficial effects of this invention are: this invention processes one keyway at a time, making it applicable to both odd-numbered and even-numbered keyway spline shafts, thus improving its versatility; and because this invention uses a stop to limit the workpiece from the side away from the flywheel, it prevents the workpiece from bending and deforming due to the pressure of the turning wheel during the spline shaft processing, thereby improving the quality of the resulting spline shaft. Attached Figure Description

[0017] Figure 1 This is the front view of the present invention.

[0018] Figure 2 This is a top view of the present invention.

[0019] Figure 3 This is a three-dimensional structural diagram of the present invention.

[0020] Figure 4 yes Figure 3 A magnified view of a portion of point A in the middle.

[0021] Figure 5 This is a three-dimensional structural schematic diagram of the present invention from another perspective.

[0022] Figure 6 yes Figure 5 A magnified view of a section at point B.

[0023] The components are: 1. Frame; 2. Flying disc; 3. Flying disc drive motor; 4. Steering wheel; 5. Stop; 6. Flying disc mounting bracket; 7. Mounting bracket drive motor; 8. Stop bracket drive motor; 9. Arc groove; 10. Retaining ring; 11. Feeding device; 13. Fixing sleeve; 14. Flying disc mounting bracket guide rail; 15. Flying disc mounting bracket slider; 16. Flying disc mounting bracket lead screw; 17. Stop bracket guide rail; 18. Stop bracket slider; 19. Stop bracket lead screw. Detailed Implementation

[0024] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0025] Example 1

[0026] like Figures 1 to 6 The involute spline cold rolling structure shown includes a frame 1, a feeding device 11, a flyboard 2, and a stop 5. In this embodiment, the frame 1 is used to support the overall structure of this embodiment. The feeding device 11 is installed at one end of the frame 1. In use, the feeding device 11 pushes the workpiece to be processed into an involute spline forward and drives the workpiece to be processed to rotate. The feeding device 11 in this embodiment is prior art. For details, please refer to Chinese invention patent application publication number CN114798785A. It will not be described in detail in this embodiment.

[0027] In this embodiment, the flying disc 2 is rotatably mounted on the frame 1 and located on one side of the workpiece to be processed. The center line of the flying disc 2 is set in the vertical direction and the flying disc 2 is driven by the flying disc drive motor 3 to rotate relative to the frame 1. In this embodiment, a frisbee mounting frame 6 is optimally provided. The frisbee mounting frame 6 is mounted on the frame 1 and forms a horizontal sliding pair with the frame 1. Both ends of the rotating shaft of the frisbee 2 are rotatably connected to the frisbee mounting frame 6 via bearings. A frisbee drive motor 3 is mounted on the frisbee mounting frame 6, and its output shaft is connected to the rotating shaft of the frisbee 2 to drive the frisbee 2 to rotate. In this embodiment, the frisbee drive motor 3 can be mounted on the upper part of the frisbee mounting frame 6, with its output shaft connected to the top end of the rotating shaft of the frisbee 2 via a coupling. Alternatively, the frisbee drive motor 3 can be mounted on the lower part of the frisbee mounting frame 6, with its output shaft connected to the bottom end of the rotating shaft of the frisbee 2 via a coupling. It should be understood that those skilled in the art can also connect the output shaft of the frisbee drive motor 3 to the rotating shaft of the frisbee 2 in other ways, such as through gear transmission or synchronous belt connection. In this preferred embodiment, two mounting blocks are provided on the frisbee mounting frame 6. The top and bottom ends of the rotating shaft of the frisbee 2 are rotatably connected to the two mounting blocks by bearings. The frisbee 2 is located in the "C"-shaped space formed between the two mounting blocks and the frisbee mounting frame 6. The two mounting blocks are integrally formed with the frisbee mounting frame 6 to ensure the connection strength between the frisbee mounting frame 6 and the mounting blocks.

[0028] In order to achieve the horizontal movement of the flying disc mounting frame 6, this embodiment is provided with a mounting frame drive motor 7, which is mounted on the frame 1 and is used to drive the flying disc mounting frame 6 to move toward or away from the workpiece to be processed. The flying disc 2 moves synchronously with the movement of the flying disc mounting frame 6. The movement of the flying disc 2 can be used to adjust the position of the turning wheel 4 according to the diameter of the involute spline to be processed. In this embodiment, two frisbee mounting bracket guide rails 14 are detachably bolted onto the frame 1 along a direction perpendicular to the workpiece to be processed. The two frisbee mounting bracket guide rails 14 are parallel. A frisbee mounting bracket slider 15 is detachably bolted to the bottom of the frisbee mounting bracket 6. The frisbee mounting bracket slider 15 cooperates with the frisbee mounting bracket guide rails 14. Through the relative sliding of the frisbee mounting bracket slider 15 and the frisbee mounting bracket guide rails 14, the frisbee mounting bracket 6 can move horizontally relative to the frame 1. In this embodiment, a first fixing block is fixed to the bottom of the frisbee mounting bracket 6. A frisbee mounting bracket lead screw 16 is provided between the two frisbee mounting bracket guide rails 14. The frisbee mounting bracket lead screw 16 is parallel to the frisbee mounting bracket guide rails 14, passes through the first fixing block, and is threadedly engaged with the first fixing block (not shown in the figure). One end of the mounting bracket lead screw 16 is connected to one end of the mounting bracket drive motor 7. The flying disc mounting bracket lead screw 16 is rotatably connected to the frame 1 using a bearing seat. The mounting bracket drive motor 7 drives the flying disc mounting bracket lead screw 16 to rotate, and the flying disc mounting bracket lead screw 16 converts its rotation into the linear motion of the first fixed block, thereby driving the entire flying disc mounting bracket 6 to move horizontally along the direction of the flying disc mounting bracket guide rail 14. When the present invention is used to process splined shafts with larger diameters, the mounting bracket drive motor 7 drives the flying disc mounting bracket 6 to move away from the workpiece, so that the flying disc 2 and the turning wheel 4 both move away from the center line of the workpiece. When processing splined shafts with smaller diameters, the mounting bracket drive motor 7 drives the flying disc mounting bracket 6 to move closer to the center line of the workpiece, so as to reduce the distance between the flying disc 2 and the turning wheel 4 and the center line of the workpiece.

[0029] In this embodiment, one or more rollers 4 are evenly arranged along the circumference of the edge of the disc 2. Specifically, one or more mounting slots are evenly opened on the circumference of the disc 2, and one roller 4 is installed in each mounting slot. The center line of the roller 4 is parallel to the center line of the disc 2, that is, the center line of the roller 4 is the same as the vertical direction. The top and bottom ends of the central shaft of the roller 4 are rotatably connected to the parts of the disc 2 located above and below the mounting slot, respectively. The side of the roller 4 away from the center line of the disc 2 extends out of the mounting slot so that the roller 4 can contact the workpiece to be processed into an involute spline in the use state. The roller 4 is used to extrude spline grooves on the workpiece in the use state. For example, the present invention can open two mounting slots symmetrically on both sides of the disc 2. In this case, there are two rollers 4. When the roller 4 is no longer in contact with the workpiece due to the rotation of the disc 2, the workpiece rotates to the next part where a keyway needs to be processed, and the next roller 4 extrudes another keyway on the workpiece.

[0030] In this embodiment, the baffle 5 is mounted on the frame 1, and the baffle 5 and the fly disk 2 are located on opposite sides of the workpiece to be processed. The baffle 5, in use, abuts against the workpiece from the side away from the fly disk 2, applying a force towards the fly disk 2 to prevent the workpiece from bending and deforming away from the fly disk 2 when the fly disk 2 squeezes it. In this embodiment, the bottom of the baffle 5 forms a horizontal sliding pair with the frame 1. Specifically, two baffle guide rails 17, perpendicular to the workpiece to be processed, are detachably mounted on the frame 1 using bolts. The two baffle guide rails 17 are parallel. A baffle slider 18 is detachably mounted on the bottom of the baffle 5 using bolts. The baffle slider 18 slides with the baffle guide rails 17, allowing the baffle 5 to slide horizontally on the frame 1 through the relative sliding of the baffle slider 18 and the baffle guide rails 17. In this embodiment, the baffle 5 is preferably L-shaped, the baffle slider 18 is located at the bottom of the horizontal part of the baffle 5, and the bottom end of the vertical part of the baffle rod 5 is fixedly connected to the end of the horizontal part near the steering wheel 4. In this embodiment, the horizontal part and the vertical part of the baffle 5 are preferably integrally formed to ensure the overall strength of the baffle 5 and the stability during use.

[0031] In this embodiment, a stop frame drive motor 8 is detachably mounted on the frame 1 using bolts. The stop frame drive motor 8 is used to drive the stop frame 5 to move toward or away from the workpiece to be processed, and to adjust the position of the stop frame 5 according to the diameter of the involute spline to be processed. In this embodiment, a stop frame screw 19 is provided between the two stop frame guide rails 17. The stop frame screw 19 is parallel to the stop frame guide rails 17. The output shaft of the stop frame drive motor 8 is connected to one end of the stop frame screw 19 by a coupling. At each end of the stop frame screw 19, a bearing seat is used to rotatably connect it to the frame 1. A second fixing block (not shown in the figure) is fixed at the bottom of the stop frame 5. The stop frame screw 19 passes through the second fixing block and is threaded into the second fixing block. The stop frame drive motor 8 drives the stop frame screw 19 to rotate, and the stop frame screw 19 converts its rotation into linear motion of the second fixing block, thereby driving the stop frame 5 to move horizontally along the length direction of the stop frame guide rails 17. When machining a splined shaft with a large diameter, the present invention drives the stop 5 to move away from the center line of the workpiece by the stop drive motor 8. When machining a splined shaft with a small diameter, the stop 5 is driven to move closer to the center line of the workpiece by the stop drive motor 8. This ensures that during the machining process, the workpiece is always in contact with the stop 5 when it does not bend or only undergoes slight bending deformation, thus preventing the workpiece from undergoing large bending deformation.

[0032] In this embodiment, the stop 5 preferably has an arc groove 9 on the side facing the workpiece to be processed. The diameter of the circle containing the arc groove 9 is larger than the diameter of the workpiece to be processed into an involute spline shaft. In use, the workpiece to be processed rests against the arc groove 9. In this embodiment, a circular retaining ring 10 is preferably rotatably arranged in the arc groove 9. The retaining ring 10 rotates relative to the stop 5 in the arc groove 9 as the workpiece to be processed rotates. When the workpiece to be processed rotates, the retaining ring 10 rotates accordingly, reducing the resistance to the rotation of the workpiece to be processed. In this embodiment, an internal spline is preferably provided on the retaining ring 10. The module of the internal spline is equal to the module of the involute spline to be processed. The internal spline is used to mesh with the processed involute spline in use.

[0033] To prevent the retaining ring 10 from detaching from the arc groove 9 during rotation, in this embodiment, the center line of the arc groove 9 is positioned biased towards the retainer 5. That is, the arc groove 9 in this embodiment is larger than a semicircle, meaning that most of the retaining ring 10 is located within the arc groove 9, thus limiting the retaining ring 10 radially in the horizontal direction. To facilitate the rotation of the retaining ring 10 within the arc groove 9 and reduce the resistance to rotation between the retainer 5 and the retaining ring 10, a needle roller is provided at the bottom of the arc groove 9. The outer cylindrical surface of the retaining ring 10 abuts against the needle roller. Through the rotation of the needle roller, the retaining ring 10 is... The sliding motion between the retaining ring 10 and the retaining bracket 5 is converted into rolling motion, thereby reducing the friction between them. In order to axially limit the retaining ring, an arc-shaped retaining ring is provided on both sides of the arc groove 9 in this embodiment to prevent the retaining ring 10 from moving axially in use. In this embodiment, the retaining ring is detachably installed on both sides of the arc groove 9 using multiple bolts. Preferably, a needle roller guard plate is provided in the arc groove 9 in this embodiment to fix the needle roller and make the needle roller roll in a specific position. The needle roller and the needle roller guard plate in this embodiment are existing technologies and will not be described in detail in this embodiment.

[0034] In this embodiment, the pressing of the roller 4 into the keyway on the workpiece and the rotation and axial pushing of the workpiece are the same as those disclosed in Chinese Invention Patent No. CN114798785A. The difference is that in this embodiment, one of the rollers 4 is replaced by a stop, so that one spline groove is pressed out at a time. This makes it suitable for the processing and manufacturing of spline shafts with odd and even numbers of spline grooves. In this embodiment, a stop 5 is set at the location of the removed roller. When the workpiece is processed into a spline shaft, the stop 5 abuts against the workpiece from the side away from the roller 4, thereby counteracting the force exerted on the workpiece by the pressing of the roller 4 in the direction of the stop 5, and preventing the workpiece from being squeezed and bent.

[0035] Example 2

[0036] This embodiment is a further improvement on Embodiment 1. Compared with Embodiment 1, this embodiment has a fixed sleeve 13 fixedly installed in the arc groove 9. The fixed sleeve 13 can be installed in the arc groove 9 and welded to the stop frame 5. The retaining ring 10 is rotatably installed in the fixed sleeve 13 using a bearing. The bearing reduces the resistance between the retaining ring 10 and the stop frame 5. In use, the retaining ring 10 rotates relative to the fixed sleeve 13 as the workpiece rotates. The structure of the remaining parts in this embodiment is the same as in Embodiment 1. For details, please refer to Embodiment 1. This embodiment will not be described in detail.

[0037] Example 3

[0038] This embodiment is a further improvement based on embodiment 1. Compared with embodiment 1, in this embodiment, the arc groove 9 is set as a circular hole that passes through both sides of the stop frame 5 along the axial direction of the workpiece to be processed, and the stop ring 10 is rotatably set in the circular hole by bearing, so as to better limit the radial movement of the stop ring 10. The structure of the rest of this embodiment is the same as that of embodiment 1. For details, please refer to embodiment 1. This embodiment will not be described in detail.

[0039] Unless otherwise specified in the above description, all parts are prior art, or can be implemented using existing technology. Furthermore, the specific embodiments described in this invention are merely preferred embodiments and are not intended to limit the scope of this invention. That is, all equivalent changes and modifications made to the content of the claims of this invention should be considered within the technical scope of this invention.

Claims

1. A cold rolling structure for involute splines, comprising: Rack (1); The feeding device (11) is installed at one end of the frame (1). When in use, the feeding device (11) pushes the workpiece to be processed into an involute spline forward and drives the workpiece to be processed to rotate. Flying disc (2), the number of flying discs (2) is one, which is rotatably set on the frame (1) and located on one side of the workpiece to be processed. The center line of the flying disc (2) is set in the vertical direction and the flying disc (2) is driven by the flying disc drive motor (3) to rotate relative to the frame (1). At the edge of the flying disc (2), one or more rollers (4) are evenly set in the circumferential direction. The center line of the rollers (4) is parallel to the center line of the flying disc (2). The rollers (4) are used to extrude spline grooves on the workpiece in the working state. Its features are: Also includes The baffle (5) is set on the frame (1), and the baffle (5) and the flyboard (2) are located on both sides of the workpiece to be processed. The baffle (5) is used to hold the workpiece away from the flyboard (2) in the working state to prevent the workpiece from bending and deforming in the direction away from the flyboard (2) when the flyboard (2) squeezes the workpiece.

2. The involute spline cold rolling structure according to claim 1, characterized in that: Also includes The frisbee mounting frame (6) is set on the frame (1) and forms a horizontal sliding pair with the frame (1). The upper and lower ends of the rotating shaft of the frisbee (2) are rotatably connected to the frisbee mounting frame (6). The frisbee drive motor (3) is installed on the frisbee mounting frame (6). The output shaft of the frisbee drive motor (3) is connected to the rotating shaft of the frisbee (2) to drive the frisbee (2) to rotate. Mounting bracket drive motor (7) is mounted on the frame (1) and is used to drive the flying disc mounting bracket (6) to move toward or away from the workpiece to be processed. The flying disc (2) moves synchronously with the flying disc mounting bracket (6) and is used to adjust the position of the turning wheel (4) according to the diameter of the involute spline to be processed.

3. The involute spline cold rolling structure according to claim 2, characterized in that: The bottom of the baffle (5) and the frame (1) form a horizontal sliding pair; A stop drive motor (8) is provided on the frame (1). The stop drive motor (8) is used to drive the stop (5) to move toward or away from the workpiece to be processed, and to adjust the position of the stop (5) according to the diameter of the involute spline to be processed.

4. The involute spline cold rolling structure according to claim 1, 2, or 3, characterized in that: The stop (5) has an arc groove (9) on the side facing the workpiece to be processed. In use, the workpiece to be processed rests against the arc groove (9).

5. The involute spline cold rolling structure according to claim 4, characterized in that: A circular retaining ring (10) is rotatably installed inside the arc groove (9). The retaining ring (10) rotates relative to the retainer (5) inside the arc groove (9) as the workpiece to be processed rotates.

6. The involute spline cold rolling structure according to claim 5, characterized in that: The retaining ring (10) is provided with an internal spline, which is used to mesh with the machined involute spline in the use state.

7. The involute spline cold rolling structure according to claim 6, characterized in that: The center line of the arc groove (9) is biased towards one side of the retainer (5). The bottom of the arc groove (9) is provided with a needle roller. The outer cylindrical surface of the retaining ring (10) abuts against the needle roller. Both sides of the arc groove (9) are provided with arc-shaped retaining rings to prevent the retaining ring (10) from moving axially during use.

8. The involute spline cold rolling structure according to claim 7, characterized in that: A needle roller guard plate is provided inside the arc groove (9) to fix the needle roller.

9. The involute spline cold rolling structure according to claim 6, characterized in that: A fixed sleeve (13) is fixedly installed inside the arc groove (9). The retaining ring (10) is rotatably installed inside the fixed sleeve (13) using a bearing. In use, the retaining ring (10) rotates relative to the fixed sleeve (13) as the workpiece to be processed rotates.

10. The involute spline cold rolling structure according to claim 6, characterized in that: The circular groove (9) is a circular hole that passes through both sides of the stop (5) along the axial direction of the workpiece to be processed, and the retaining ring (10) is rotatably set in the circular hole by bearing.

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