An automatic feeding device and method for bidirectional rolling of linear gears

Abstract

This invention discloses an automatic feeding device and method for bidirectional rolling of linear gears, relating to the field of gear processing technology. It includes: a guide rail motion module, mounted on a base and connected to a first rolling die; a second rolling die, fixedly mounted on the base, with the first and second rolling dies parallel along their length; and an automatic feeding mechanism that defines a rolling gap between the first and second rolling dies, used to transport the blank to the rolling gap. The rolling die employs trapezoidal hobbing, and the first rolling die can move forward or backward relative to the second rolling die, thereby performing reciprocating rolling of the blank in both directions. This bidirectional, repetitive rolling method facilitates high-quality tooth profile forming, avoiding problems such as excessively large lugs and insufficient tooth tip filling. The height of the formed tooth profile is close to the target linear gear, while also improving the applicability and versatility of the equipment.

Description

Technical Field

[0001] This invention relates to the field of gear processing technology, and in particular to an automatic feeding device and method for bidirectional rolling of linear gears. Background Technology

[0002] Linear gears are point-contact transmission gears based on the conjugate theory of spatial curves. They have the characteristics of having a small number of teeth and a large transmission ratio, making them suitable for lightweight working scenarios.

[0003] The main manufacturing technologies for linear gears currently include 3D printing, CNC milling, CNC gear grinding, and laser micro-milling. However, these technologies are not efficient enough to meet the requirements for mass production of linear gears.

[0004] The rolling forming process for linear gears can improve manufacturing efficiency, but it has the following drawbacks:

[0005] 1. After the spur gear tooth profile is formed, there is a large lug and the tooth tip filling is small.

[0006] 2. Rolling is generally a unidirectional rolling process and cannot be rolled in reverse.

[0007] 3. It has poor versatility and cannot be adapted to the manufacturing of linear gears of various sizes.

[0008] 4. Manual installation of the billet is required, and automation has not been achieved.

[0009] In view of this, how to provide a linear gear rolling device that can partially or completely solve the above-mentioned technical problems is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0010] The purpose of this invention is to provide an automatic feeding device and method for bidirectional rolling of linear gears to solve the problems existing in the prior art.

[0011] To achieve the above objectives, the present invention provides an automatic feeding linear gear bidirectional rolling device, comprising:

[0012] The guide rail motion module is mounted on the base and connected to the first rolling die;

[0013] The second rolling die is fixedly mounted on the base, and the first rolling die and the second rolling die are parallel along the length direction;

[0014] An automatic feeding mechanism is provided, wherein a rolling gap is defined between the first rolling die and the second rolling die, and the automatic feeding mechanism is used to transport the billet to the rolling gap.

[0015] The guide rail motion module can drive the first rolling die to move forward and backward along the rolling gap, and the first rolling die and the second rolling die form a tooth profile by rolling the billet forward and backward.

[0016] Furthermore, the inner side of the first rolling die is provided with trapezoidal first rolling teeth at uniform intervals, and the inner side of the second rolling die is provided with trapezoidal second rolling teeth at uniform intervals. The first rolling teeth and the second rolling teeth correspond to each other and are adapted in shape.

[0017] Furthermore, the guide rail motion module includes:

[0018] An outer guide rail is mounted on a base via a first right-angle support, and a bearing seat is provided on the outer guide rail;

[0019] The inner guide rail is slidably connected to the outer guide rail and threadedly connected to the lead screw. One end of the lead screw is mounted on a bearing seat through a bearing, and the other end is connected to a motor drive. The first rolling die is set on the inner guide rail. The motor is used to drive the first rolling die to move forward and backward along the rolling gap.

[0020] Furthermore, it also includes:

[0021] The first mold support is fixedly connected to the inner guide rail. The first mold support has a first mounting hole through its inner and outer surfaces. The first rolling mold is disposed in the first mounting hole.

[0022] The first upper top plate is disposed on the upper surface of the first rolling die and fixed to the first die support by the first upper bolt;

[0023] The first side top plate is disposed on the side of the first rolling die and fixed to the first die support by the first side bolts.

[0024] Furthermore, it also includes:

[0025] The second mold support is mounted on the base via a second right-angle support. The second mold support has a second mounting hole extending through its inner and outer surfaces. The second rolling mold is mounted inside the second mounting hole.

[0026] The second upper top plate is disposed on the upper surface of the second rolling die and fixed to the second die support by the second upper bolt;

[0027] The second side top plate is disposed on the side of the second rolling die and fixed to the second die support by the second side bolts.

[0028] Furthermore, the first right-angle support has an adjustment groove extending through the upper and lower surfaces in a direction perpendicular to the rolling gap, and the base has multiple adjustment holes corresponding to the adjustment groove. The first right-angle support is fixed to the base by inserting fastening bolts into the adjustment groove and adjustment holes.

[0029] Furthermore, the automatic feeding mechanism includes:

[0030] A vibratory feeder is mounted on the base and has a feed inlet.

[0031] The slide rail has one end connected to the feeding port and the other end corresponding to the rolling gap; the vibratory feeder can transport the billet through the feeding port to the slide rail, and the billet moves along the slide rail to the rolling gap.

[0032] Furthermore, it also includes:

[0033] A vibratory feeder base is disposed on the lower surface of the vibratory feeder;

[0034] The vibratory feeder support column is vertically mounted on the base, with its upper end connected to the vibratory feeder base.

[0035] A vibrator is disposed in the middle of the vibratory plate. An arc-shaped vibratory plate guide rail is defined inside the vibratory plate. One end of the vibratory plate guide rail is connected to the feeding port. The vibrator is used to transport the billet from the vibratory plate guide rail to the feeding port.

[0036] Furthermore, the slide rail is inclined, with its higher end connected to the feed port and its lower end corresponding to the rolling gap.

[0037] The present invention also provides an automatic feeding method for bidirectional rolling of linear gears, which, using the automatic feeding bidirectional rolling device for linear gears, includes the following steps:

[0038] S1: The automatic feeding mechanism transports the billet to the rolling gap, and the billet bites into the rolling gap and is located in the initial rolling position;

[0039] S2: The second rolling die is divided into a first step, a second step and a third step along the length direction. The first step is close to the initial rolling position. The guide rail motion module drives the first rolling die to move in the forward direction along the rolling gap to the junction of the first step and the second step to complete the forming of the first step. Then, the first rolling die is driven to move in the reverse direction along the rolling gap to the initial rolling position to complete the teeth of the first step.

[0040] S3: The guide rail motion module drives the first rolling die to move forward along the rolling gap to the junction of the second and third steps to complete the forming of the second step. Then, it drives the first rolling die to move backward along the rolling gap to the initial rolling position to complete the teeth forming of the second step.

[0041] S4: The guide rail motion module drives the first rolling die to move forward along the rolling gap to the end of the third step, completing the forming of the third step. Then, it drives the first rolling die to move backward along the rolling gap to the initial rolling position, completing the teeth of the third step.

[0042] S5: The billet is rolled and the tooth profile is formed, then it exits the rolling gap.

[0043] The present invention discloses the following technical effects:

[0044] 1. The rolling die adopts a trapezoidal hobbing die. The first rolling die can move forward or backward relative to the second rolling die, thereby rolling the blank in a forward and reverse reciprocating manner. This bidirectional repetitive rolling method is conducive to high-quality tooth profile forming and avoids forming problems such as excessively large lugs and small tooth tip filling. The height of the formed tooth profile is close to that of the target line gear.

[0045] 2. The rolling die includes a movable first rolling die and a fixed second rolling die, which are fixed to the first die support and the second die support respectively by bolts. When facing the manufacturing requirements of linear gears of different sizes, it can be flexibly disassembled and replaced with the corresponding die. At the same time, the distance between the first rolling die and the second rolling die can be adjusted, thereby changing the width of the rolling gap, improving the applicability of the equipment and making it versatile.

[0046] 3. The billet feeding adopts an automatic feeding mechanism. The billet is transported from the vibratory plate to the slide rail by the vibrator, and then slid into the rolling gap by the slide rail, which can realize the automatic feeding of the billet.

[0047] 4. Gear machining is free of undercutting, and there is no interference between the rolling die and the blank, which can avoid forming failure. Attached Figure Description

[0048] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. 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 creative effort.

[0049] Figure 1 This is a schematic diagram of the structure of the present invention;

[0050] Figure 2 This is a schematic diagram of the installation of the first rolling die;

[0051] Figure 3 This is a schematic diagram of the first rolling die structure;

[0052] Figure 4 This is a schematic diagram of the vibratory feeder structure;

[0053] Figure 5 Design drawing for linear gears;

[0054] The components are as follows: 1. Base; 2. First right-angle support; 3. Inner guide rail; 4. Lead screw; 5. Bearing; 6. Bearing seat; 7. Outer guide rail; 8. First mold support; 9. Coupling; 10. Motor; 11. Vibratory feeder guide rail; 12. Vibrator; 13. Vibratory feeder; 14. Slide rail; 15. Vibratory feeder base; 16. Vibratory feeder support column; 17. First upper bolt; 18. First side bolt; 19. First side top plate; 20. Second mold support; 21. First upper top plate; 22. First rolling mold; 23. Feed port. Detailed Implementation

[0055] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0056] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0057] This invention provides an automatic feeding linear gear bidirectional rolling device, comprising:

[0058] The guide rail motion module is mounted on the base 1 and connected to the first rolling die 22;

[0059] The second rolling die is fixedly set on the base 1. The first rolling die 22 and the second rolling die have basically the same structure and are parallel to each other along the length direction.

[0060] An automatic feeding mechanism is used to transport the billet to the rolling gap between the first rolling die 22 and the second rolling die.

[0061] The guide rail motion module can drive the first rolling die 22 to move forward and backward along the rolling gap, and the first rolling die 22 and the second rolling die roll the billet forward and backward to form a tooth profile.

[0062] In this embodiment, the inner side of the first rolling die 22 is provided with trapezoidal first rolling teeth at uniform intervals, and the inner side of the second rolling die is provided with trapezoidal second rolling teeth at uniform intervals. The first rolling teeth and the second rolling teeth correspond to each other and are adapted in shape.

[0063] In this embodiment, the guide rail motion module includes:

[0064] The outer guide rail 7 is mounted on the base 1 via the first right-angle support 2, and a bearing seat 6 is provided on the outer guide rail 7.

[0065] The inner guide rail 3 is slidably connected to the outer guide rail 7 and threadedly connected to the lead screw 4. One end of the lead screw 4 is mounted on the bearing seat 6 through the bearing 5, and the other end is connected to the motor 10 through the coupling 9. The first rolling die 22 is set on the inner guide rail 3. The motor 10 is used to drive the first rolling die 22 to move forward and backward along the rolling gap.

[0066] In this embodiment, it also includes:

[0067] The first mold support 8 is fixedly connected to the inner guide rail 3. The first mold support 8 has a first mounting hole through its inner and outer surfaces. The first rolling mold 22 is set in the first mounting hole.

[0068] The first upper top plate 21 is disposed on the upper surface of the first rolling die 22 and fixed to the first die support 8 by the first upper bolt 17;

[0069] The first side top plate 19 is disposed on the side of the first rolling die 22 and fixed to the first die support 8 by the first side bolt 18.

[0070] In this embodiment, it also includes:

[0071] The second mold support 20 is mounted on the base 1 via a second right-angle support. The second mold support 20 has a second mounting hole through its inner and outer surfaces. The second rolling mold is mounted in the second mounting hole.

[0072] The second upper top plate is set on the upper surface of the second rolling die and fixed to the second die support 20 by the second upper bolt;

[0073] The second side top plate is set on the side of the second rolling die and fixed to the second die support 20 by the second side bolts.

[0074] In this embodiment, the first right-angle support 2 has an adjustment groove through the upper and lower surfaces in a direction perpendicular to the rolling gap. The base 1 has multiple adjustment holes corresponding to the adjustment groove. The first right-angle support 2 is fixed to the base 1 by inserting fastening bolts into the adjustment groove and adjustment holes.

[0075] In this embodiment, the automatic feeding mechanism includes:

[0076] Vibratory feeder 13 is mounted on base 1 and has a feed inlet 23;

[0077] The slide rail 14 has one end connected to the feed port 23 and the other end corresponding to the rolling gap; the vibratory plate 13 can transport the billet through the feed port 23 to the slide rail 14, and the billet moves along the slide rail 14 to the rolling gap.

[0078] In this embodiment, it also includes:

[0079] The vibratory feeder base 15 is disposed on the lower surface of the vibratory feeder 13;

[0080] The vibratory feeder support column 16 is vertically mounted on the base 1, and its upper end is connected to the vibratory feeder base 15.

[0081] The vibrator 12 is located in the middle of the vibrating plate 13. The vibrating plate 13 has an arc-shaped vibrating plate guide rail 11. One end of the vibrating plate guide rail 11 is connected to the feeding port 23. The vibrator 12 is used to transport the billet from the vibrating plate guide rail 11 to the feeding port 23.

[0082] In this embodiment, the slide rail 14 is inclined, with its higher end connected to the feed port 23 and its lower end corresponding to the rolling gap.

[0083] This invention also provides an automatic feeding method for bidirectional rolling of linear gears, using an automatic feeding device for bidirectional rolling of linear gears, comprising the following steps:

[0084] S1: The billet is placed in the vibratory plate 13, the vibrator 12 vibrates, the billet inside moves randomly, and part of the billet vibrates to the vibratory port 23 and enters the slide rail 14 from the vibratory port 23. The billet slides down along the slide rail 14 and enters the rolling gap. The billet bites into the rolling gap and is located at the initial rolling position.

[0085] S2: The second rolling die is divided into a first step, a second step and a third step along the length direction. The first step is close to the initial rolling position. The motor 10 drives the lead screw 4 to rotate, which in turn drives the first rolling die 22 to move forward along the rolling gap to the junction of the first step and the second step to complete the forming of the first step. Then, the first rolling die 22 is driven to move backward along the rolling gap to the initial rolling position to complete the teeth of the first step.

[0086] S3: Motor 10 drives the first rolling die 22 to move forward along the rolling gap to the junction of the second and third steps to complete the forming of the second step. Then, it drives the first rolling die 22 to move backward along the rolling gap to the initial rolling position to complete the teeth forming of the second step.

[0087] S4: Motor 10 drives the first rolling die 22 to move forward along the rolling gap to the end of the third step to complete the forming of the third step, and then drives the first rolling die 22 to move backward along the rolling gap to the initial rolling position to complete the teeth forming of the third step.

[0088] S5: The billet is rolled and the tooth profile is formed, then it exits the rolling gap.

[0089] During the above process, the second rolling die remains stationary, and the rolling is completed only by moving the first rolling die 22. This allows for better control of the movement accuracy of the two dies, thereby improving the overall rigidity and stability of the processing.

[0090] The first rolling die 22 moves forward and backward multiple times, which can correct the formed tooth profile multiple times. Therefore, the height of the processed linear gear is close to that of the target linear gear, and defects such as tooth profile protrusion can be reduced. The processing accuracy is high and the processing quality is good.

[0091] The above-described embodiments are used to process linear gears, and the tooth profile of the linear gears is inspected.

[0092] The design parameters for the spur gear are as follows:

[0093] Taking the spatial cylindrical helix as the contact line of the linear gear, its equation is:

[0094]

[0095] Where m is the helix radius and n is the pitch coefficient. A 2% compensation is applied to the radius of the cylindrical blank obtained from the volume of the target spur gear to reduce the influence of material flow in the axial direction. The spur gear design drawing is as follows: Figure 5 As shown.

[0096] The test results show that the spur gear tooth profile has no lug defects, the surface accuracy of the tooth profile can reach grade 7, and the tooth tip filling degree meets the design requirements.

[0097] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0098] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. An automatic feeding linear gear bidirectional rolling device, characterized in that, include: The guide rail motion module is mounted on the base (1) and connected to the first rolling die (22); The second rolling die is fixedly mounted on the base (1), and the first rolling die (22) and the second rolling die are parallel along the length direction; An automatic feeding mechanism is provided, wherein a rolling gap is defined between the first rolling die (22) and the second rolling die, and the automatic feeding mechanism is used to transport the billet to the rolling gap; The guide rail motion module can drive the first rolling die (22) to move forward and backward along the rolling gap, and the first rolling die (22) and the second rolling die form a tooth profile by rolling the billet forward and backward.

2. The automatic feeding linear gear bidirectional rolling device according to claim 1, characterized in that, The inner side of the first rolling die (22) is provided with trapezoidal first rolling teeth at uniform intervals, and the inner side of the second rolling die is provided with trapezoidal second rolling teeth at uniform intervals. The first rolling teeth and the second rolling teeth correspond to each other and are adapted in shape.

3. The automatic feeding linear gear bidirectional rolling device according to claim 2, characterized in that, The guide rail motion module includes: The outer guide rail (7) is mounted on the base (1) via the first right-angle support (2), and the outer guide rail (7) is provided with a bearing seat (6); The inner guide rail (3) is slidably connected to the outer guide rail (7) and threadedly connected to the lead screw (4). One end of the lead screw (4) is mounted on the bearing seat (6) through the bearing (5), and the other end is connected to the motor (10) for transmission. The first rolling die (22) is set on the inner guide rail (3). The motor (10) is used to drive the first rolling die (22) to move forward and backward along the rolling gap.

4. The automatic feeding linear gear bidirectional rolling device according to claim 3, characterized in that, Also includes: The first mold support (8) is fixedly connected to the inner guide rail (3). The first mold support (8) has a first mounting hole through its inner and outer surfaces. The first rolling mold (22) is set in the first mounting hole. The first upper top plate (21) is disposed on the upper surface of the first rolling die (22) and fixed to the first die support (8) by the first upper bolt (17); The first side top plate (19) is disposed on the side of the first rolling die (22) and fixed to the first die support (8) by the first side bolt (18).

5. The automatic feeding linear gear bidirectional rolling device according to claim 4, characterized in that, Also includes: The second mold support (20) is mounted on the base (1) via a second right-angle support. The second mold support (20) has a second mounting hole through its inner and outer surfaces. The second rolling mold is mounted in the second mounting hole. The second upper top plate is disposed on the upper surface of the second rolling die and fixed to the second die support (20) by the second upper bolt; The second side top plate is set on the side of the second rolling die and fixed to the second die support (20) by the second side bolts.

6. The automatic feeding linear gear bidirectional rolling device according to claim 3, characterized in that, The first right-angle support (2) has an adjustment groove through its upper and lower surfaces in a direction perpendicular to the rolling gap. The base (1) has multiple adjustment holes corresponding to the adjustment groove. The first right-angle support (2) is fixed to the base (1) by inserting fastening bolts into the adjustment groove and adjustment holes.

7. The automatic feeding linear gear bidirectional rolling device according to claim 1, characterized in that, The automatic feeding mechanism includes: A vibratory feeder (13) is disposed on the base (1), and the vibratory feeder (13) has a feed inlet (23); The slide rail (14) is connected at one end to the feed port (23) and at the other end to the rolling gap; the vibrating plate (13) can transport the billet through the feed port (23) to the slide rail (14), and the billet moves along the slide rail (14) to the rolling gap.

8. The automatic feeding linear gear bidirectional rolling device according to claim 7, characterized in that, Also includes: A vibratory plate base (15) is disposed on the lower surface of the vibratory plate (13); The vibratory feeder support column (16) is vertically mounted on the base (1), and its upper end is connected to the vibratory feeder base (15). A vibrator (12) is disposed in the middle of the vibrating plate (13). An arc-shaped vibrating plate guide rail (11) is defined inside the vibrating plate (13). One end of the vibrating plate guide rail (11) is connected to the feeding port (23). The vibrator (12) is used to transport the billet from the vibrating plate guide rail (11) to the feeding port (23).

9. The automatic feeding linear gear bidirectional rolling device according to claim 8, characterized in that, The slide rail (14) is inclined, with its higher end connected to the feed port (23) and its lower end corresponding to the rolling gap.

10. A method for automatic feeding of bidirectional linear gear rolling, characterized in that, The automatic feeding linear gear bidirectional rolling device according to any one of claims 1-9 is applied. Includes the following steps: S1: The automatic feeding mechanism transports the billet to the rolling gap, and the billet bites into the rolling gap and is located in the initial rolling position; S2: The second rolling die is divided into a first step, a second step and a third step along the length direction. The first step is close to the initial rolling position. The guide rail motion module drives the first rolling die (22) to move along the rolling gap in the forward direction to the junction of the first step and the second step to complete the forming of the first step. Then, the first rolling die (22) is driven to move along the rolling gap in the reverse direction to the initial rolling position to complete the teeth of the first step. S3: The guide rail motion module drives the first rolling die (22) to move forward along the rolling gap to the junction of the second and third steps to complete the forming of the second step, and then drives the first rolling die (22) to move backward along the rolling gap to the initial rolling position to complete the teeth of the second step. S4: The guide rail motion module drives the first rolling die (22) to move forward along the rolling gap to the end of the third step, completing the forming of the third step, and then drives the first rolling die (22) to move backward along the rolling gap to the initial rolling position, completing the teeth of the third step. S5: The billet is rolled and the tooth profile is formed, then it exits the rolling gap.

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