Friction stir additive manufacturing equipment

Abstract

The utility model discloses friction stir additive manufacturing equipment, and belongs to the field of additive manufacturing, the friction stir additive manufacturing equipment comprises a base, a rotatably arranged main shaft, a first feeding meshing piece and a second feeding meshing piece, and the first feeding meshing piece and the second feeding meshing piece are correspondingly arranged; the first feeding meshing piece and the second feeding meshing piece are arranged in a spaced mode to form a driving channel corresponding to the conveying channel. And the first driving assembly is used for driving the first feeding meshing piece and the second feeding meshing piece to rotate relatively so as to drive the bars to enter the conveying channel in the axis direction of the conveying channel. By means of the structure, continuous feeding of bars can be achieved, then continuous material adding is achieved, the gap between the first feeding meshing piece and the second feeding meshing piece can be easily adjusted, the clamping force of the bars can be adjusted, and then the downward pushing force can be adjusted.

Description

Technical Field

[0001] This application relates to the technical field of additive manufacturing, and particularly to a friction stir additive manufacturing device. Background Art

[0002] Friction stir additive manufacturing can be classified into wire-fed friction stir additive manufacturing, rod-fed friction stir additive manufacturing, and particle-fed friction stir additive manufacturing according to the raw materials. In rod-fed additive manufacturing, since the rods are in sections and rotate during the additive manufacturing process, it is difficult to achieve continuous additive manufacturing. Summary of the Utility Model

[0003] This application aims to solve at least one of the technical problems in the related art to some extent.

[0004] To this end, an object of this application is to provide a friction stir additive manufacturing device, which includes: a base; a main shaft rotatably arranged on the base, the main shaft being hollow to form a feeding channel; a feeding device including at least a pair of corresponding first feeding engaging members and second feeding engaging members, the first feeding engaging member and the second feeding engaging member being spaced apart along the radial direction of the first feeding engaging member and forming a driving channel corresponding to the feeding channel; the feeding device further includes a first driving component for driving the first feeding engaging member and the second feeding engaging member to rotate relative to each other to drive the rod stock to enter the feeding channel along the axial direction of the feeding channel.

[0005] According to the above technical features, since this application uses the first feeding engaging member and the second feeding engaging member to drive the movement of the rod stock, it is easy to adjust the clamping force of the rod stock, and then adjust the magnitude of 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 a friction stir additive manufacturing device, during the friction stir process between the rod stock and the base material, the pressure between the rod stock and the base material can be adjusted by adjusting the clamping force to better achieve additive manufacturing. At the same time, this structure can also realize continuous feeding of the rod stock and thus continuous additive manufacturing, and has the characteristics of a compact structure.

[0006] Optionally, in an embodiment of this application, the feeding device further includes a first worm and a second worm, the first worm and the second worm being meshed with the first feeding engaging member and the second feeding engaging member respectively; wherein, the first driving component drives the first worm and the second worm to rotate to drive the first feeding engaging member and the second feeding engaging member to rotate relative to each other.

[0007] Optionally, in an embodiment of the present application, 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 feeding channel. The first feeding engaging member and the second feeding engaging member are arranged between the first worm and the second worm. The axes of the first feeding engaging member and the second feeding engaging member are both perpendicular to the axis of the feeding channel.

[0008] Optionally, in an embodiment of the present application, the feeding bracket is connected to the base. The first driving assembly includes a feeding driving motor. The feeding driving motor is fixedly installed on the feeding bracket. The rotational speed of the worm is greater than that of the main shaft.

[0009] Optionally, in an embodiment of the present application, the feeding bracket is connected to the main shaft. The first driving assembly includes a motor.

[0010] Optionally, in an embodiment of the present application, 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 correspondingly arranged with the driving channel.

[0011] Optionally, in an embodiment of the present application, a hollow motor driving shaft is arranged on the hollow motor. The hollow motor driving shaft is hollow. A driving gear is arranged on the hollow motor driving shaft. A first driven gear and a second driven gear are respectively arranged on the first worm and the second worm. The first driven gear and the second driven gear are both meshed with the driving gear.

[0012] Optionally, in an embodiment of the present application, the motor includes a first driving shaft. The feeding device further includes a first transmission member and a second transmission member which are axially spaced along the first driving shaft. The first driving shaft is in transmission connection with the first worm through the first transmission member. The first driving shaft is also in transmission connection with the second worm through the second transmission member.

[0013] Optionally, in an embodiment of the present application, the feeding device further includes an auxiliary wheel. The auxiliary wheel, the first worm and the second worm are circumferentially spaced on the feeding bracket along the feeding channel. The motor drives the auxiliary wheel, the first worm and the second worm to rotate simultaneously.

[0014] Optionally, in an embodiment of the present application, the gap of the driving channel is adjustable.

[0015] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present application. Description of the Drawings

[0016] The above-mentioned and / or additional aspects and advantages of the present application will become apparent and be easily understood from the following description of the embodiments in conjunction with the drawings, where:

[0017] Figure 1 Schematic structural diagram of a friction stir additive manufacturing device according to an embodiment of the present application;

[0018] Figure 2 Schematic structural diagram of a friction stir additive manufacturing device according to another embodiment of the present application;

[0019] Figure 3 According to the present application Figure 1 Schematic diagram of the specific implementation structure of the first driving component;

[0020] Figure 4 Schematic structural diagram of a friction stir additive manufacturing device according to still another embodiment of the present application.

[0021] Reference numerals:

[0022] Spindle 10, feeding channel 11;

[0023] First feeding engagement teeth 21, second feeding engagement teeth 22, first worm 31, second worm 32, first driven gear 33, second driven gear 34, second feeding engagement wheel 42, feeding support 50, first transmission member 61, second transmission member 62, hollow motor 70, avoidance channel 71, driving gear 72;

[0024] Second driving member 80;

[0025] Blank 100. Detailed implementation manners

[0026] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present application, and should not be construed as a limitation to the present application.

[0027] As Figures 1-4 shown, the friction stir additive manufacturing device includes a base, a spindle 10 and a feeding device. The spindle 10 is rotatably arranged on the base, and the spindle 10 is hollow to form a feeding channel 11; the feeding device includes at least a pair of correspondingly arranged first feeding engagement members and second feeding engagement members. The first feeding engagement member and the second feeding engagement member are spaced apart along the radial direction of the first feeding engagement member, and a driving channel 40 corresponding to the feeding channel 11 is formed. The friction stir additive manufacturing device further includes a first driving component. The first driving component can drive the first feeding engagement member and the second feeding engagement member to rotate relative to each other to drive the blank to enter the feeding channel 11 along the axial direction of the feeding channel 11. Among them, both the first feeding engagement member and the second feeding engagement member can be of a meshing tooth structure; alternatively, one of the first feeding engagement member and the second feeding engagement member is of a meshing tooth structure, and the other is of a meshing wheel structure.

[0028] As Figure 1 and Figure 2 shown, when both the first feeding engaging member and the second feeding engaging member are engaging tooth structures, that is, the first feeding engaging member is the first feeding engaging tooth 21 and the second feeding engaging member is the second feeding engaging tooth 22, it can be understood that the first feeding engaging tooth 21 and the second feeding engaging tooth 22 can be arranged in parallel and at intervals, and the first feeding engaging tooth 21 and the second feeding engaging tooth 22 can rotate relative to each other to form a driving channel 40. When the bar stock 100 enters the driving channel 40, the relatively rotating first feeding engaging tooth 21 and second feeding engaging tooth 22 can bite the bar stock 100 and move it towards the feeding channel 11 and along the axial direction of the feeding channel 11, and then drive the bar stock 100 into the feeding channel 11. Then, the main shaft 10 rotatably arranged on the base can drive the bar stock in the feeding channel 11 to rotate. The rotating bar stock can continuously stir and rub with the substrate to generate heat, thereby realizing plastic softening to achieve friction stir additive manufacturing. Further, by using the method of driving the bar stock to move with the first feeding engaging tooth 21 and the second feeding engaging tooth 22, a thrust towards the substrate can be formed in the axial direction of the bar stock, which helps to generate heat by friction stir, and the magnitude of the thrust can be adjusted by adjusting the clamping force between the two engaging teeth. When this structure is applied to a friction stir additive manufacturing device, during the friction stir process between the bar stock 100 and the substrate, the pressure between the bar stock 100 and the substrate can be adjusted by adjusting the clamping force to better achieve additive manufacturing. When both the first feeding engaging member and the second feeding engaging member are engaging tooth structures, the engaging force is greater and a larger pressure can be provided.

[0029] When one of the first feeding engaging member and the second feeding engaging member is a meshing tooth structure and the other is a meshing wheel structure, that is, when the first feeding engaging member is the first feeding engaging tooth 21 and the second feeding engaging member is the second feeding engaging wheel 42, a driving channel 40 can also be formed between the first feeding engaging tooth 21 and the second feeding engaging wheel. Similarly, when the bar stock 100 enters the driving channel 40, the relatively rotating first feeding engaging tooth 21 and the second feeding engaging wheel 42 can bite the bar stock 100 and move it towards the feeding channel 11 and along the axial direction of the feeding channel 11, and then drive the bar stock 100 into the feeding channel 11. Then, the main shaft 10 rotatably provided on the base can drive the bar stock in the feeding channel 11 to rotate. The rotating bar stock can continuously stir and rub against the substrate to generate heat, thereby achieving plastic softening to realize friction stir additive manufacturing. Further, by using the first feeding engaging tooth 21 and the second feeding engaging wheel 42 to drive the movement of the bar stock, a thrust force towards the substrate can be formed in the axial direction of the bar stock, which helps to generate heat by friction stir, and the magnitude of the thrust force can be adjusted by adjusting the clamping force between the two. When this structure is applied to a friction stir additive manufacturing device, during the friction stir process between the bar stock 100 and the substrate, the pressure between the bar stock 100 and the substrate can be adjusted by adjusting the clamping force to better realize additive manufacturing. When one of the first feeding engaging member and the second feeding engaging 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 improve the service life.

[0030] In the above solution, the meshing teeth can be gears, or helical gears, double helical gears, etc.; the meshing wheels can use smooth wheels, grooved wheels with machined surfaces, or rubber wheels, etc.

[0031] In this application, there can be multiple pairs of the first feeding engaging member and the second feeding engaging member, or they can appear non-pairwise.

[0032] Next, the solution in which both the first feeding engaging member and the second feeding engaging member are meshing tooth structures, that is, the first feeding engaging member is the first feeding engaging tooth 21 and the second feeding engaging member is the second feeding engaging tooth 22, will be specifically described.

[0033] In an embodiment of the present application, the feeding device further includes a first worm 31 and a second worm 32. The first worm 31 and the second worm 32 are respectively engaged with the first feeding engaging tooth 21 and the second feeding engaging tooth 22; the feeding device further includes a first driving assembly, and the first driving assembly drives the first worm and the second worm to rotate, thereby driving the first feeding engaging tooth 21 and the second feeding engaging tooth 22 to rotate relatively.

[0034] In this application, since the first worm 31 is used to drive the first feeding engagement tooth 21 to rotate and the second worm 32 is used to drive the second feeding engagement tooth 22 to rotate, the structure is simple. It can easily adjust the gap between the first feeding engagement tooth 21 and the second feeding engagement tooth 22 to achieve the adjustment of the clamping force of the bar stock 100, that is, the gap of the driving channel 40 is adjustable, and then the adjustment of the downward thrust magnitude can be realized, that is, the greater the clamping force, the greater the thrust, and the smaller the clamping force, the smaller the thrust. In an embodiment of this application, the feeding device includes a feeding support 50. The first worm 31 and the second worm 32 are arranged on the feeding support 50. The axes of the first worm 31 and the second worm 32 are parallel to the axis of the material conveying channel 11. The first feeding engagement tooth 21 and the second feeding engagement tooth 22 are arranged between the first worm 31 and the second worm 32. The axes of the first feeding engagement tooth 21 and the second feeding engagement tooth 22 are both perpendicular to the axis of the material conveying channel 11. As Figure 1 shown, the first feeding engagement tooth 21 and the second feeding engagement tooth 22 are arranged horizontally and can rotate relative to each other, so that the bar stock 100 can be well driven to enter the material conveying channel 11 along the axis direction of the material conveying channel 11.

[0035] In an embodiment of this application, the feeding support 50 is rotatably arranged on the base. The main shaft 10 rotates and the main shaft 10 drives the bar stock 100 to be able to rotate relative to the feeding support 50. In another embodiment of this application, the feeding support 50 can be connected to the main shaft 10, and the feeding support 50 can rotate with the rotation of the main shaft 10. In this embodiment, the bar stock 100 does not rotate relative to the feeding support 50.

[0036] Next, the specific structure of the rotational connection between the feeding support 50 and the base will be specifically described.

[0037] As Figure 1 shown, the first driving component is a feeding driving motor 60. The feeding driving motor 60 is fixedly installed on the feeding support 50. The feeding support 50 is rotatably installed on the base, so that the main shaft 10 can rotate relative to the feeding support 50. The first worm 31 and the second worm 32 are rotatably arranged on the feeding support 50, and the first feeding engagement tooth 21 and the second feeding engagement tooth 22 are also rotatably arranged on the feeding support 50. In this structure, if the feeding driving motor 60 does not drive the first worm 31 and the second worm 32 to rotate, the rotating bar stock 100 will drive the first feeding engagement tooth 21 and the second feeding engagement tooth 22 to rotate and then drive the first worm 31 and the second worm 32 to rotate. Furthermore, the transmission parts such as the belt between the feeding driving motor 60 and the first worm 31 and the second worm 32 will rotate in the opposite direction along with the rotation of the main shaft 10. At this time, the bar stock 100 is conveyed upward, which is different from the expectation. Thus, if it is necessary to realize that the bar stock 100 also moves downward during rotation, the rotational speed of the first worm 31 and the second worm 32 needs to be greater than the rotational speed of the main shaft 10.

[0038] In the above structure, a feeding drive motor 60 can be used to drive the first worm 31 and the second worm 32 to rotate simultaneously, so as to avoid the out-of-sync problem in the control process of dual motors.

[0039] Next, the specific structure of the feeding bracket 50 connected to the main shaft 10 will be specifically described, that is, the feeding bracket 50 can rotate with the rotation of the main shaft 10. In this structure, an ordinary 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, gears.

[0040] In the embodiment where an ordinary motor is used to drive the first worm 31 and the second worm 32 to rotate through, for example, a belt, specifically, the first driving assembly includes a motor, and the motor can be arranged beside, for example, the first worm 31, and it can drive the first worm 31 and the second worm 32 to rotate through, for example, a belt.

[0041] Furthermore, as Figure 1 shown, the motor includes a first driving shaft, and the feeding device further includes a first transmission member 61 and a second transmission member 62 arranged at intervals along the axial direction of the first driving shaft. The first driving shaft is in transmission connection with the first worm 31 through the first transmission member 61, and the first driving shaft is also in transmission connection with 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 by one first driving shaft and two transmission members. In this structure, a height difference can be formed between the first transmission member 61 and the second transmission member 62 to drive the first worm 31 and the second worm 32 to rotate simultaneously. The above-mentioned first transmission member 61 and second transmission member 62 can be a belt or a chain, etc.

[0042] In another embodiment, the friction stir additive manufacturing equipment can also be provided with an auxiliary wheel 33. As Figure 3 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 circumferential direction 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 an auxiliary wheel 33, the first worm 31 and the second worm 32 can be driven to rotate simultaneously through a transmission member, such as a belt, so as to realize that one motor drives the first worm 31 and the second worm 32 to rotate simultaneously and avoid the out-of-sync problem in the control process of dual motors.

[0043] 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. As Figure 2As shown, the hollow motor 70 includes an avoidance channel 71. The avoidance channel 71 is correspondingly arranged with the driving channel 40. The avoidance channel 71 enables the bar stock 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 material conveying channel 11.

[0044] In a specific embodiment, a hollow motor drive shaft is provided on the hollow motor 70. 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 drive gear 72 is sleeved on the hollow motor drive shaft. A first driven gear 33 and a second driven gear 34 are respectively arranged on the first worm 31 and the second worm 32. The first driven gear 33 and the second driven gear 34 are meshed with the drive gear 72. In this way, the first worm 31 and the second worm 32 can be driven to rotate simultaneously by one hollow motor 70, avoiding the out-of-sync problem in the double-motor control process.

[0045] In an embodiment of the present application, the gap of the driving channel 40 is adjustable. For example, the first feeding engaging teeth 21 and the second feeding engaging teeth 22 are detachably installed on the feeding bracket 50. The gap of the driving channel 40 can be adjusted by adjusting the radii of the first feeding engaging teeth 21 and the second feeding engaging teeth 22. Also for example, the first feeding engaging teeth 21 and the first worm 31 are arranged on the first support, and the second feeding engaging teeth 22 and the second worm 32 are arranged on the second support. The gap between the first support and the second support is adjusted to realize the adjustable gap of the driving channel 40.

[0046] Next, a solution will be specifically described in which one of the first feeding engaging member and the second feeding engaging member is a engaging tooth structure and the other is a engaging wheel structure, that is, the first feeding engaging member is the first feeding engaging teeth 21 and the second feeding engaging member is the second feeding engaging wheel 42.

[0047] As Figure 4 shown, the feeding device includes a feeding bracket 50. The feeding bracket 50 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 engaging teeth 21 and the second feeding engaging wheel 42 are rotatably arranged on the feeding bracket 50. The axes of the first feeding engaging teeth 21 and the second feeding engaging wheel 42 are perpendicular to the axis of the material conveying channel 11. The first driving assembly is used to drive the first feeding engaging teeth 21 to rotate. The rotating first feeding engaging teeth 21 interact with the second feeding engaging wheel 42 to bite the bar stock to move along the axis direction of the material conveying channel 11, so as to realize additive manufacturing.

[0048] Among them, the second feeding engaging wheel 42 can be polished to reduce friction.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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 this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0054] 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 application. 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.

[0055] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. A friction stir additive manufacturing device, characterized in that Comprising: Base; Spindle, the spindle is rotatably arranged on the base, and the spindle is hollow to form a material feeding channel; Feeding device, the feeding device at least includes a pair of correspondingly arranged first feeding engaging members and second feeding engaging members, the first feeding engaging member and the second feeding engaging member are arranged at intervals along the radial direction of the first feeding engaging member, and a driving channel corresponding to the material feeding channel is formed; The feeding device further includes a first driving component, and the first driving component is used to drive the first feeding engaging member and the second feeding engaging member to rotate relatively, so as to drive the bar material to enter the material feeding channel along the axial direction of the material feeding channel.

2. The device according to claim 1, characterized in that, The feeding device further includes a first worm and a second worm, and the first worm and the second worm are respectively engaged with the first feeding engaging member and the second feeding engaging member; Wherein, the first driving component drives the first worm and the second worm to rotate, so as to drive the first feeding engaging member and the second feeding engaging member to rotate relatively.

3. The device according to claim 2, wherein, 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 material feeding channel, the first feeding engaging member and the second feeding engaging member are arranged between the first worm and the second worm, and the axes of the first feeding engaging member and the second feeding engaging member are both perpendicular to the axis of the material feeding channel.

4. The device according to claim 3, characterized in that, The feeding bracket is connected to the base, the first driving component includes a feeding driving motor, the feeding driving motor is fixedly installed on the feeding bracket, and the rotation speed of the worm is greater than the rotation speed of the spindle.

5. The device according to claim 3, characterized in that, The feeding bracket is connected to the spindle, and the first driving component includes a motor.

6. The device according to claim 3, characterized in that, The feeding bracket is connected to the spindle, the first driving component includes a hollow motor, the hollow motor includes an avoidance channel, and the avoidance channel is correspondingly arranged with the driving channel.

7. The device according to claim 6, characterized in that, A hollow motor driving shaft is arranged on the hollow motor, the hollow motor driving shaft is hollow, a driving gear is arranged on the hollow motor driving shaft, and a first driven gear and a second driven gear are respectively arranged on the first worm and the second worm, and both the first driven gear and the second driven gear are engaged with the driving gear.

8. The device according to claim 4 or 5, characterized in that, The motor includes a first driving shaft, the feeding device further includes a first transmission member and a second transmission member arranged at intervals along the axial direction of the first driving shaft, the first driving shaft is in transmission connection with the first worm through the first transmission member, and the first driving shaft is also in transmission connection with the second worm through the second transmission member.

9. The device according to claim 4 or 5 or 6, characterized in that, The feeding device further includes an auxiliary wheel, the auxiliary wheel, the first worm and the second worm are arranged on the feeding bracket at intervals along the circumferential direction of the material feeding channel, and the motor drives the auxiliary wheel, the first worm and the second worm to rotate simultaneously.

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

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