A friction stir additive manufacturing device

Abstract

The present invention discloses a friction stir additive manufacturing device, which belongs to the field of additive manufacturing, and includes a base, a main shaft that is rotatably arranged, and a first feeding meshing member and a second feeding meshing member that are correspondingly arranged, the main shaft forms a feeding channel, and the first feeding meshing member and the second feeding meshing member are spaced to form a driving channel corresponding to the feeding channel; it also includes a first driving component that drives the first feeding meshing member and the second feeding meshing member to rotate relative to each other, so as to drive the rod material to enter the feeding channel along the axial direction of the feeding channel; wherein the first feeding meshing member and the second feeding meshing member are both meshing tooth structures, or one of the first feeding meshing member and the second feeding meshing member is a meshing tooth structure, and the other is a meshing wheel structure. This structure can not only realize the continuous feeding of the rod material and thus realize continuous additive, but also can easily adjust the gap between the first feeding meshing member and the second feeding meshing member to realize the adjustment of the clamping force of the rod material, thereby realizing the adjustment of the downward thrust size.

Description

Technical Field

[0001] The present invention relates to the technical field of additive manufacturing, and in particular to a friction stir additive manufacturing device. Background Art

[0002] Friction stir additive manufacturing is divided into rod-feeding friction stir additive manufacturing, particle-feeding friction stir additive manufacturing and wire-feeding friction stir additive manufacturing based on raw materials. In rod-feeding structure additive manufacturing, since the rods are in sections and the rods are in a rotating state during the additive manufacturing process, it is difficult to achieve continuous additive manufacturing. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an object of the present invention is to provide a stir friction additive manufacturing device, which includes: a base; a main shaft, which is rotatably set on the base and is hollow to form a feed channel; a feeding device, the feeding device includes at least a pair of correspondingly arranged first feeding meshing members and second feeding meshing members, the first feeding meshing members and the second feeding meshing members are arranged at radial intervals along the first feeding meshing members, and form a driving channel corresponding to the feed channel; the feeding device also includes a first driving assembly, the first driving assembly is used to drive the first feeding meshing member and the second feeding meshing member to rotate relative to each other, so as to drive the rod material to enter the feed channel along the axial direction of the feed channel; wherein the first feeding meshing member and the second feeding meshing member are both meshing tooth structures; or, one of the first feeding meshing member and the second feeding meshing member is a meshing tooth structure, and the other is a meshing wheel structure.

[0005] According to the above technical features, the present application uses the first feeding engagement member and the second feeding engagement member to drive the movement of the rod, so it is easy to adjust the clamping force of the rod, and then adjust the downward thrust, that is, the greater the clamping force, the greater the thrust, and the smaller the clamping force, the smaller the thrust. When this structure is applied to the stir friction additive manufacturing equipment, the pressure between the rod and the substrate can be adjusted by adjusting the clamping force during the stir friction process with the substrate to better achieve additive manufacturing. At the same time, this structure can also realize continuous feeding of the rod and thus continuous additive manufacturing, and has the characteristics of compact structure.

[0006] Optionally, in one embodiment of the present invention, when the first feeding meshing member and the second feeding meshing member are both meshing tooth structures, the first feeding meshing member is a first feeding meshing tooth, and the second feeding meshing member is a second feeding meshing tooth, and the feeding device also includes a first worm and a second worm, and the first worm and the second worm are respectively meshed with the first feeding meshing tooth and the second feeding meshing tooth; wherein the first driving assembly drives the first worm and the second worm to rotate, so as to drive the first feeding meshing tooth and the second feeding meshing tooth to rotate relative to each other.

[0007] Optionally, in one embodiment of the present invention, the feeding device includes a feeding bracket, the first worm and the second worm are arranged on the feeding bracket, the axes of the first worm and the second worm are parallel to the axis of the feed channel, the first feeding meshing tooth and the second feeding meshing tooth are arranged between the first worm and the second worm, and the axes of the first feeding meshing tooth and the second feeding meshing tooth are both perpendicular to the axis of the feed channel.

[0008] Optionally, in one embodiment of the present invention, the feeding bracket is connected to the base, the first driving assembly includes a feeding driving motor, the feeding driving motor is fixedly mounted on the feeding bracket, and the rotation speed of the worm is greater than the rotation speed of the main shaft.

[0009] Optionally, in one embodiment of the present invention, the feeding support is connected to the main shaft, and the first driving assembly includes a motor.

[0010] Optionally, in one embodiment of the present invention, the feeding bracket is connected to the main shaft, the first driving assembly includes a hollow motor, the hollow motor includes an avoidance channel, and the avoidance channel is arranged corresponding to the driving channel.

[0011] Optionally, in one embodiment of the present invention, a hollow motor drive shaft is provided on the hollow motor, the hollow motor drive shaft is hollow, a driving gear is provided on the hollow motor drive shaft, a first driven gear and a second driven gear are provided on the first worm and the second worm respectively, and the first driven gear and the second driven gear are both engaged with the driving gear.

[0012] Optionally, in one embodiment of the present invention, the motor includes a first drive shaft, and the feeding device also includes a first transmission member and a second transmission member axially spaced apart along the first drive shaft. The first drive shaft is connected to the first worm gear through the first transmission member, and the first drive shaft is also connected to the second worm gear through the second transmission member.

[0013] Optionally, in one embodiment of the present invention, the feeding device further comprises an auxiliary wheel, and the auxiliary wheel, the first worm and the second worm are arranged on the feeding bracket at intervals along the circumference of the feeding channel, and the motor drives the auxiliary wheel, the first worm and the second worm to rotate simultaneously.

[0014] Optionally, in one embodiment of the present invention, the gap of the drive channel is adjustable.

[0015] Optionally, in one embodiment of the present invention, when one of the first feeding meshing member and the second feeding meshing member is a meshing tooth structure and the other is a meshing wheel structure, the first feeding meshing member is a first feeding meshing tooth, the second feeding meshing member is a second feeding meshing wheel, the feeding device includes a feeding bracket, the first feeding meshing tooth and the second feeding meshing wheel are rotatably arranged on the feeding bracket, the axes of the first feeding meshing tooth and the second feeding meshing wheel are perpendicular to the axis of the feed channel, and the first driving assembly is used to drive the first feeding meshing tooth to rotate.

[0016] Optionally, in one embodiment of the present invention, a plurality of the second feeding meshing wheels are provided, and the plurality of the second feeding meshing wheels are spaced apart along the axial direction of the feeding channel.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0019] Figure 1 A schematic diagram of the structure of a friction stir additive manufacturing device according to an embodiment of the present invention;

[0020] Figure 2 is a schematic structural diagram of a friction stir additive manufacturing device according to another embodiment of the present invention;

[0021] Figure 3 According to the present invention Figure 1 A schematic diagram of a specific implementation structure of the first drive component;

[0022] Figure 4 Schematic diagram of the structure of a friction stir additive manufacturing device according to another embodiment of the present invention.

[0023] Reference numerals:

[0024] Main shaft 10, feeding channel 11;

[0025] The first feeding meshing teeth 21, the second feeding meshing teeth 22, the first worm 31, the second worm 32, the first driven gear 33, the second driven gear 34, the second feeding meshing wheel 42, the feeding bracket 50, the first transmission member 61, the second transmission member 62, the hollow motor 70, the avoidance channel 71, and the driving gear 72;

[0026] A second driving member 80;

[0027] Bar stock 100. DETAILED DESCRIPTION

[0028] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0029] like Figure 1-Figure 4 As shown, the friction stir additive manufacturing device includes a base, a main shaft 10 and a feeding device, wherein the main shaft 10 is rotatably arranged on the base, and the main shaft 10 is hollow to form a feeding channel 11; the feeding device includes at least a pair of correspondingly arranged first feeding meshing members and second feeding meshing members, wherein the first feeding meshing members and the second feeding meshing members are arranged at intervals along the radial direction of the first feeding meshing member, and a driving channel 40 corresponding to the feeding channel 11 is formed. The friction stir additive manufacturing device also includes a first driving assembly, which can drive the first feeding meshing member and the second feeding meshing member to rotate relative to each other to drive the rod material to enter the feeding channel 11 along the axial direction of the feeding channel 11, wherein the first feeding meshing member and the second feeding meshing member can both be meshing tooth structures; or, one of the first feeding meshing member and the second feeding meshing member is a meshing tooth structure, and the other is a meshing wheel structure.

[0030] like Figure 1 and Figure 2As shown, when the first feeding meshing member and the second feeding meshing member are both meshing tooth structures, that is, the first feeding meshing member is the first feeding meshing tooth 21, and the second feeding meshing member is the second feeding meshing tooth 22, it can be understood that the first feeding meshing tooth 21 and the second feeding meshing tooth 22 can be arranged in parallel and spaced apart, and the first feeding meshing tooth 21 and the second feeding meshing tooth 22 can rotate relative to each other to form a driving channel 40. When the bar 100 enters the driving channel 40, the first feeding meshing tooth 21 and the second feeding meshing tooth 22 that rotate relative to each other can bite the bar 100 and move it toward the feed channel 11 and along the axial direction of the feed channel 11, and then drive the bar 100 to enter the feed channel 11. Then the main shaft 10 that is rotatably arranged on the base can drive the bar in the feed channel 11 to rotate, and the rotating bar can continuously stir and rub with the substrate to generate heat, thereby achieving plastic softening, so as to achieve stir friction additive manufacturing. Furthermore, the first feeding meshing teeth 21 and the second feeding meshing teeth 22 are used to drive the bar to move, which can form a thrust toward the substrate in the axial direction of the bar, which helps to stir and generate heat, and the magnitude of the thrust can be adjusted by adjusting the clamping force between the two meshing teeth. When this structure is applied to the stir friction additive manufacturing equipment, the pressure between the bar 100 and the substrate can be adjusted by adjusting the clamping force during the stir friction between the bar 100 and the substrate, so as to better realize additive manufacturing. When the first feeding meshing member and the second feeding meshing member are both meshing tooth structures, the meshing force is greater and can provide greater pressure.

[0031] When one of the first feeding meshing member and the second feeding meshing member is a meshing tooth structure and the other is a meshing wheel structure, that is, when the first feeding meshing member is the first feeding meshing tooth 21 and the second feeding meshing wheel 42, a driving channel 40 can also be formed between the first feeding meshing tooth 21 and the second feeding meshing wheel. Similarly, when the bar 100 enters the driving channel 40, the first feeding meshing tooth 21 and the second feeding meshing wheel 42 that rotate relative to each other can bite the bar 100 and move it toward the feed channel 11 and along the axial direction of the feed channel 11, and then drive the bar 100 to enter the feed channel 11. Then the main shaft 10 that is rotatably arranged on the base can drive the bar in the feed channel 11 to rotate, and the rotating bar can continuously stir and rub with the substrate to generate heat, thereby achieving plastic softening to achieve stir friction additive manufacturing. Furthermore, the first feeding meshing tooth 21 and the second feeding meshing wheel 42 are used to drive the bar to move, which can form a thrust toward the substrate in the axial direction of the bar, which helps to stir and generate heat, and the magnitude of the thrust can be adjusted by adjusting the clamping force between the two. When this structure is applied to the stir friction additive manufacturing equipment, the pressure between the bar 100 and the substrate can be adjusted by adjusting the clamping force during the stir friction between the bar 100 and the substrate, so as to better realize additive manufacturing. When one of the first feeding meshing member and the second feeding meshing member is a meshing tooth structure and the other is a meshing wheel structure, the friction of the meshing wheel structure is relatively small, which can increase the service life.

[0032] In the above scheme, the meshing teeth can be gears, or be helical gears, herringbone gears, etc.; the meshing wheels can be smooth wheels, wheels with grooves on the surface, or rubber wheels, etc.

[0033] In the present invention, the first feeding engaging members and the second feeding engaging members may be in multiple pairs or may not appear in pairs.

[0034] The following specifically describes a solution in which both the first feeding meshing member and the second feeding meshing member are meshing tooth structures, that is, the first feeding meshing member is the first feeding meshing tooth 21 , and the second feeding meshing member is the second feeding meshing tooth 22 .

[0035] In one embodiment of the present application, the feeding device also includes a first worm 31 and a second worm 32, which are respectively meshed with the first feeding meshing teeth 21 and the second feeding meshing teeth 22; the feeding device also includes a first driving assembly, which drives the first worm and the second worm to rotate, thereby driving the first feeding meshing teeth 21 and the second feeding meshing teeth 22 to rotate relative to each other.

[0036] Because the present application uses the first worm 31 to drive the first feeding meshing tooth 21 to rotate and the second worm 32 to drive the second feeding meshing tooth 22 to rotate, the structure is simple, and it can easily adjust the gap between the first feeding meshing tooth 21 and the second feeding meshing tooth 22 to adjust the clamping force of the rod 100, that is, the gap of the driving channel 40 is adjustable, thereby adjusting the downward thrust, that is, the greater the clamping force, the greater the thrust, and the smaller the clamping force, the smaller the thrust. In one embodiment of the present application, the feeding device includes a feeding bracket 50, the first worm 31 and the second worm 32 are arranged on the feeding bracket 50, the axes of the first worm 31 and the second worm 32 are parallel to the axis of the feed channel 11, the first feeding meshing tooth 21 and the second feeding meshing tooth 22 are arranged between the first worm 31 and the second worm 32, and the axes of the first feeding meshing tooth 21 and the second feeding meshing tooth 22 are perpendicular to the axis of the feed channel 11. Figure 1 As shown, the first feeding meshing teeth 21 and the second feeding meshing teeth 22 are arranged transversely and can rotate relative to each other, so that the rod 100 can be well driven into the feeding channel 11 along the axial direction of the feeding channel 11.

[0037] In one embodiment of the present application, the feed bracket 50 is rotatably disposed on the base, and the spindle 10 rotates and the spindle 10 drives the bar 100 to rotate relative to the feed bracket 50. In another embodiment of the present application, the feed bracket 50 can be connected to the spindle 10, and the feed bracket 50 can rotate with the rotation of the spindle 10. In this embodiment, the bar 100 does not rotate relative to the feed bracket 50.

[0038] The specific structure of the feeding bracket 50 being rotatably connected to the base will be described in detail below.

[0039] like Figure 1 As shown, the first driving assembly is a feed drive motor 60, which is fixedly mounted on a feed bracket 50, and the feed bracket 50 is rotatably mounted on a base, so that the spindle 10 can rotate relative to the feed bracket 50. The first worm 31 and the second worm 32 are rotatably arranged on the feed bracket 50, and the first feed meshing teeth 21 and the second feed meshing teeth 22 are also rotatably arranged on the feed bracket 50. In this structure, if the feed drive motor 60 does not drive the first worm 31 and the second worm 32 to rotate, the rotating bar 100 will drive the first feed meshing teeth 21 and the second feed meshing teeth 22 to rotate and then drive the first worm 31 and the second worm 32 to rotate, and then the transmission member such as a belt between the feed drive motor 60 and the first worm 31 and the second worm 32 will rotate in the opposite direction as the spindle 10 rotates, and at this time the bar 100 is transported upward, which is different from the expectation. In this way, if the bar 100 is to move downward during the rotation, the rotation speeds of the first worm 31 and the second worm 32 must be greater than the rotation speed of the main shaft 10 .

[0040] In the above structure, a feeding drive motor 60 can be used to simultaneously drive the first worm 31 and the second worm 32 to rotate to avoid the problem of asynchronism during dual-motor control.

[0041] The following will specifically describe the specific structure of the feed bracket 50 connected to the main shaft 10, that is, the feed bracket 50 can rotate with the rotation of the main shaft 10. In this structure, a common motor can be used to drive the first worm 31 and the second worm 32 to rotate through, for example, a belt; or a hollow motor can be used to drive the first worm 31 and the second worm 32 to rotate through, for example, a gear.

[0042] In an embodiment in which a common motor is used to drive the first worm 31 and the second worm 32 to rotate by, for example, a belt, specifically, the first drive assembly includes a motor, which can be arranged, for example, on the side of the first worm 31, and can drive the first worm 31 and the second worm 32 to rotate by, for example, a belt.

[0043] Furthermore, if Figure 1 As shown, the motor includes a first drive shaft, and the feeding device also includes a first transmission member 61 and a second transmission member 62 arranged axially spaced apart along the first drive shaft. The first drive shaft is connected to the first worm 31 through the first transmission member 61, and the first drive shaft is also connected to the second worm 32 through the second transmission member 62. That is, the first worm 31 and the second worm 32 are driven to rotate simultaneously through two transmission members of a first drive shaft. Under this structure, the first transmission member 61 and the second transmission member 62 can form a height difference to drive the first worm 31 and the second worm 32 to rotate simultaneously. The first transmission member 61 and the second transmission member 62 can be belts or chains, etc.

[0044] In another embodiment, the friction stir additive manufacturing device can also be provided with auxiliary wheels 33, such as Figure 3 As shown, the auxiliary wheel 33, the first worm 31 and the second worm 32 are arranged on the feeding bracket 50 at intervals along the circumference of the feeding channel 11, and the motor drives the auxiliary wheel 33, the first worm 31 and the second worm 32 to rotate simultaneously. It can be understood that the auxiliary wheel 33, the first worm 31 and the second worm 32 can be driven to rotate simultaneously by a transmission member such as a belt, so that one motor can drive the first worm 31 and the second worm 32 to rotate simultaneously to avoid the problem of asynchronism in the dual-motor control process.

[0045] In the embodiment where a hollow motor is used to drive the first worm 31 and the second worm 32 to rotate through, for example, gears, the first driving assembly includes a hollow motor 70. Figure 2As shown, the hollow motor 70 includes an avoidance channel 71, which is arranged corresponding to the driving channel 40. The avoidance channel 71 allows the bar 100 to pass through the hollow motor 70 when entering the driving channel 40. The avoidance channel 71 is a hollow channel, and its axis coincides with the axis of the feeding channel 11.

[0046] In a specific embodiment, a hollow motor drive shaft is provided on the hollow motor 70, and the hollow motor drive shaft is hollow, and the hollow part of the hollow motor drive shaft is a part of the avoidance channel 71. A driving gear 72 is sleeved on the hollow motor drive shaft, and a first driven gear 33 and a second driven gear 34 are provided on the first worm 31 and the second worm 32, respectively, and the first driven gear 33 and the second driven gear 34 are meshed with the driving gear 72. In this way, the first worm 31 and the second worm 32 can be driven to rotate by a hollow motor 70 at the same time to avoid the problem of asynchronism in the dual motor control process.

[0047] In one embodiment of the present application, the gap of the drive channel 40 is adjustable. For example, the first feed meshing tooth 21 and the second feed meshing tooth 22 are detachably mounted on the feed bracket 50, and the radius of the first feed meshing tooth 21 and the second feed meshing tooth 22 can be adjusted to achieve the adjustable gap of the drive channel 40. For another example, the first feed meshing tooth 21 and the first worm 31 are arranged on the first support, and the second feed meshing tooth 22 and the second worm 32 are arranged on the second support, and the gap between the first support and the second support is adjusted to achieve the adjustable gap of the drive channel 40.

[0048] The following specifically describes a solution in which one of the first feeding meshing member and the second feeding meshing member is a meshing tooth structure and the other is a meshing wheel structure, that is, the first feeding meshing member is the first feeding meshing tooth 21 and the second feeding meshing member is the second feeding meshing wheel 42 .

[0049] like Figure 4 As shown, the feeding device includes a feeding bracket 50, which is connected to the main shaft 10, that is, the feeding bracket 50 can rotate with the rotation of the main shaft 10. The first feeding meshing tooth 21 and the second feeding meshing wheel 42 are rotatably arranged on the feeding bracket 50, and the axes of the first feeding meshing tooth 21 and the second feeding meshing wheel 42 are perpendicular to the axis of the feeding channel 11. The first driving assembly is used to drive the first feeding meshing tooth 21 to rotate. The rotating first feeding meshing tooth 21 interacts with the second feeding meshing wheel 42 to engage the bar material and move it along the axis direction of the feeding channel 11 to achieve additive manufacturing.

[0050] The second feeding meshing wheel 42 may be polished to reduce friction.

[0051] In one embodiment of the present application, the first drive assembly may include a motor, which may directly drive the first feed meshing tooth 21 to rotate, or drive the first feed meshing tooth 21 to rotate through a reduction wheel, or drive the first feed meshing tooth 21 to rotate through a worm gear, and no specific limitation is made here.

[0052] In one embodiment of the present application, a plurality of second feeding meshing wheels 42 are provided, and the plurality of second feeding meshing wheels 42 are arranged at intervals along the axial direction of the feeding channel 11 , that is, form a sliding wall to reduce friction.

[0053] Similarly, in the above scheme, the gap of the driving channel 40 is adjustable, for example, the second feeding meshing wheel 42 is rotatably arranged on the first bracket, the first bracket is fixedly arranged on the feeding bracket 50, and the radius of the first feeding meshing tooth 21 and / or the second feeding meshing wheel 42 is adjustable, so that the gap of the driving channel 40 is adjustable. Alternatively, the first feeding meshing tooth 21 is arranged on the third support, and the gap between the third support and the first support is adjusted, so that the gap of the driving channel 40 is adjustable.

[0054] In one embodiment of the present application, the friction stir additive manufacturing device may further include a second driving member 80 and a conveyor belt, and the second driving member 80 is driven by the conveyor belt and the main shaft 10. The second driving member 80 is arranged on the base, and drives the main shaft 10 to rotate on the base through the conveyor belt.

[0055] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0056] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0057] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A friction stir additive manufacturing device, characterized in that: include: Base; A main shaft, the main shaft is rotatably arranged on the base, and the main shaft is hollow to form a material conveying channel; A feeding device, the feeding device comprising at least a pair of correspondingly arranged first feeding engagement members and second feeding engagement members, the first feeding engagement members and the second feeding engagement members being spaced apart along the radial direction of the first feeding engagement member and forming a driving channel corresponding to the feeding channel; The feeding device further comprises a first driving assembly, the first driving assembly being used to drive the first feeding engagement member and the second feeding engagement member to rotate relative to each other, so as to drive the bar material to enter the feeding channel along the axial direction of the feeding channel; Wherein, the first feeding meshing member and the second feeding meshing member are both meshing tooth structures; the first feeding meshing member is a first feeding meshing tooth, the second feeding meshing member is a second feeding meshing tooth, the feeding device further comprises a first worm and a second worm, the first worm and the second worm are respectively meshed with the first feeding meshing tooth and the second feeding meshing tooth; wherein, the first driving assembly drives the first worm and the second worm to rotate, so as to drive the first feeding meshing tooth and the second feeding meshing tooth to rotate relative to each other, the feeding device comprises a feeding bracket, the first worm and the second worm are arranged on the feeding bracket, the feeding bracket is connected to the main shaft, the first driving assembly comprises a hollow motor, the hollow motor comprises an avoidance channel, and the avoidance channel is arranged corresponding to the driving channel; Alternatively, one of the first feeding meshing member and the second feeding meshing member is a meshing tooth structure, and the other is a meshing wheel structure; the first feeding meshing member is a first feeding meshing tooth, and the second feeding meshing member is a second feeding meshing wheel, the feeding device comprises a feeding bracket, the first feeding meshing tooth and the second feeding meshing wheel are rotatably arranged on the feeding bracket, and the first driving assembly is used to drive the first feeding meshing tooth to rotate; The feeding bracket is connected to the main shaft, the first driving component includes a hollow motor, the hollow motor includes an avoidance channel, and the avoidance channel is arranged corresponding to the driving channel.

2. The device according to claim 1, characterized in that The axes of the first worm and the second worm are parallel to the axis of the feed channel, the first feed meshing tooth and the second feed meshing tooth are arranged between the first worm and the second worm, and the axes of the first feed meshing tooth and the second feed meshing tooth are perpendicular to the axis of the feed channel.

3. The device according to claim 1, characterized in that The hollow motor is provided with a hollow motor drive shaft, the hollow motor drive shaft is hollow, and a driving gear is provided on the hollow motor drive shaft. The first worm and the second worm are respectively provided with a first driven gear and a second driven gear, and the first driven gear and the second driven gear are both meshed with the driving gear.

4. The device according to claim 1, characterized in that The gap of the driving channel is adjustable.

5. The device according to claim 1, characterized in that The axes of the first feeding meshing tooth and the second feeding meshing wheel are perpendicular to the axis of the feeding channel.

6. The device according to claim 5, characterized in that A plurality of the second feeding meshing wheels are provided, and the plurality of the second feeding meshing wheels are arranged at intervals along the axial direction of the feeding channel.

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