Wire feeding mechanism and method

Abstract

The invention relates to a wire feeding mechanism and method, and the feeding mechanism comprises a rotatable driving rotor, the periphery of which is provided with a protruding structure; at least one rotatable extrusion rotor, wherein the peripheral surface of the extrusion rotor is smooth; at least part of the channel is located between the driving rotor and the extrusion rotor, and the filament materials move in the channel; the driving rotor and the extrusion rotor are arranged around the central axis of the channel, preset distances are formed between the driving rotor and the central axis of the channel and between the extrusion rotor and the central axis of the channel, the driving rotor and the extrusion rotor can rotate around the central axis of the channel, and the surface of the extrusion rotor makes contact with the surface of the silk material to limit the silk material; the protruding structure of the driving rotor can be partially embedded into the silk materials, and the silk materials are driven to conduct feeding movement along the channel. The extrusion rotor extrudes the silk materials towards the driving rotor, so that the contact between the driving rotor and the silk materials is increased, and the driving force on the silk materials is greatly enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of wire feeding drive, and particularly to a wire feeding mechanism and method. Background Art

[0002] Wire feeding refers to the axial transmission of wire materials (i.e., filamentous materials, such as thermoplastic wire materials, metal wire materials, optical fiber wire materials, carbon fiber wire materials, etc.).

[0003] Currently, the commonly used wire feeding device presses the wire material against a roller with texture, and drives the wire material to be transmitted by the rotation of the roller. For example, the solution given in US Patent Publication No. US20140159273A1 is as follows: Gears are respectively arranged on two mutually parallel first and second shafts and mesh and rotate in opposite directions to drive both sides of the wire material (wire) passing between the two shafts at the same time. Since the biting points between the shaft (or roller) and the wire material are small and few, when the resistance of the wire material is large, the bite between the shaft or roller and the wire material is likely to slip, and the driving force of this structure on the wire material and the transmission speed of the driven wire material are often limited. Another solution given in US Patent Publication No. US7896209B2: The wire material is driven to be transmitted by cutting into the wire material through a surface with internal threads. However, the internal threads are cut into the wire material by means of sliding friction, which will generate a large acting force and wear heat, easily cause the wire material to twist and be heated during the driving process, and further easily cause the deformation or blockage of the wire material during the feeding process. Another Chinese Patent Authorization Publication No. CN 113165826B discloses another feeding structure and method, which uses multiple rotating components respectively having ridges to rotate around the wire material to drive the wire material to move, and puts forward very high requirements for the positioning of multiple rotating components. For example, it is required that multiple rotating components rotate synchronously, the arrangement positions around the wire material are accurate, or the offset positions in the axial direction of the wire material are accurate.

[0004] Generally speaking, further improvement needs to be made to the wire feeding. Summary of the Invention

[0005] The purpose of the present invention is to overcome the defects of the prior art, and provide a wire feeding mechanism and method to solve the problems existing in the existing wire feeding solutions, such as the easy slippage of the bite with the wire material and the limited transmission speed, the easy twisting of the wire material and the heating during the driving process caused by the internal threads being cut into the wire material by means of sliding friction, resulting in wire material deformation or easy blockage, and the high positioning requirements for components and difficult processing.

[0006] The technical solution to achieve the above purpose is as follows:

[0007] The present invention provides a wire feeding mechanism, including:

[0008] A rotatable drive rotor, and a convex structure is provided on the outer periphery of the drive rotor;

[0009] At least one rotatable extrusion rotor, the outer peripheral surface of the extrusion rotor being smooth;

[0010] A channel, at least partially located between the drive rotor and the extrusion rotor, for the wire material to move therein;

[0011] The drive rotor and the extrusion rotor are arranged around the central axis of the channel. The drive rotor and the extrusion rotor respectively have a preset spacing from the central axis of the channel. The drive rotor and the extrusion rotor can rotate around the central axis of the channel. The surface of the extrusion rotor contacts the surface of the wire material to limit the wire material, and the protruding structure of the drive rotor can partially embed into the wire material to drive the wire material to feed and move along the channel.

[0012] The present invention also provides a wire material feeding method.

[0013] Provide a rotatable drive rotor, at least one extrusion rotor and a channel. The outer periphery of the provided drive rotor is provided with a protruding structure. The outer periphery of the provided extrusion rotor is smooth. The provided channel is for the movement of the wire material and is at least partially located between the drive rotor and the extrusion rotor;

[0014] The wire material feeding method includes the following steps:

[0015] Introduce the wire material into the channel between the provided extrusion rotor and the drive rotor, and let the extrusion rotor contact the wire material to limit the wire material;

[0016] Let the extrusion rotor and the drive rotor rotate around the wire material together, so that the extrusion rotor and the drive rotor can roll on the surface of the wire material. At least part of the protruding structure on the drive rotor embeds into the wire material to drive the wire material to feed and move along the channel.

[0017] The beneficial effects of the wire material feeding mechanism and method of the present invention are:

[0018] 1. Due to the increased contact area between the drive rotor and the wire material and the circumferential drive of the wire material by the drive rotor rolling around the wire material, the driving force on the wire material is greatly enhanced.

[0019] 2. The drive rotor mainly rolls on the surface of the wire material, and the drive process will not heat the wire material or the heating is extremely small, making the feeding process of the wire material more smooth.

[0020] 3. There is no need to consider synchronous processing between the drive rotor and the extrusion rotor. For example, there is no need to use a sun gear (internal gear or external gear) in a planetary gear system to synchronously drive the drive rotor and the extrusion rotor, and the structure is more concise.

[0021] 4. The extrusion rotor can be arranged freely, and the design space of the wire feeding mechanism is more free. For example, when dealing with wires of different materials or different diameters, considering different space constraints, or requirements for the flexibility and adaptability of the wire feeding mechanism, it can be freely designed by flexibly arranging the extrusion rotor. Since the outer surface of the extrusion rotor is set as a smooth circular surface, for example, this circular surface can be a cylindrical smooth surface or a conical smooth surface, etc.; regardless of whether the setting relationship between the driving rotor and the wire (or the channel axis) is parallel or at an angle, the angular relationship between the extrusion rotor and the wire has almost no limit and can be freely set to be parallel or at an angle, and the circumferential arrangement can also be freely set, which can be evenly arranged circumferentially or unevenly arranged; the diameter relationship between the driving rotor and the extrusion rotor has no mutual restriction, and the diameter of the extrusion rotor can be larger than the diameter of the driving rotor or smaller than the diameter of the driving rotor, and it can be freely designed according to actual applications. For example, when the extrusion rotor is set at an angle with the wire (or the channel axis), or when there are multiple extrusion rotors, the diameter of the extrusion rotor can be less than or equal to the diameter (or outer diameter) of the driving rotor. When the extrusion rotor is set parallel to the wire (or the channel axis), or when there is one extrusion rotor, the diameter of the extrusion rotor can be greater than or equal to the diameter (or outer diameter) of the driving rotor.

[0022] 5. It is more difficult for the driving rotor and the wire to get out of alignment, the driving of the wire is more stable, and it is more reliable in the long term. Considering factors such as wear of the driving rotor and the extrusion rotor, it still has long-term reliability. The sensitivity to the assembly accuracy and wear between the driving rotor and the extrusion rotor decreases, and the driving process is more robust and reliable.

[0023] 6. Since the surface of the extrusion rotor is a smooth circular surface, the position where the wire touches the extrusion rotor can be relatively fixed, the cutting depth of the wire is controlled, the swing of the wire during the extrusion process is smaller, the extrusion process is more stable, and the feeding is more accurate! For example, if the cutting depth of the wire is unbalanced, it is easy to cause large fluctuations in the torsion angle of the wire during the feeding process. This kind of fluctuation will greatly affect the feeding accuracy of the wire because the wire is generally not straight but has a certain bending stress. For example, the wire may be wound on a spool, and the bending stress after being straightened is more obvious. By accurately limiting the wire with the extrusion rotor, the state of the wire between the driving rotor and the extrusion rotor is more stable, and the extrusion process of the wire is smoother and more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 FIG. is a schematic structural diagram of an embodiment of the wire feeding mechanism of the present invention including a driving rotor and an extrusion rotor.

[0025] Figure 2 FIG. is a schematic structural diagram of an embodiment of the wire feeding mechanism of the present invention including a driving rotor and two extrusion rotors.

[0026] Figure 3 This is a three - dimensional structural schematic diagram in the wire feeding mechanism of the present invention, where the driving rotor is parallel to the wire and the extrusion rotor is arranged at an angle to the wire.

[0027] Figure 4 is Figure 3 side view of.

[0028] Figure 5 This is a structural schematic diagram of the arrangement of the guiding tube, inlet pipeline, outlet pipeline or base.

[0029] Figure 6 This is a structural schematic diagram of an embodiment of the wire feeding mechanism of the present invention, which includes a driving rotor and two extrusion rotors, in cooperation with the driving component.

[0030] Figure 7 This is a structural schematic diagram of the wire feeding mechanism of the present invention, where the driving rotor is arranged to be inclined outward.

[0031] Figure 8 This is a structural schematic diagram of the wire feeding mechanism of the present invention, where the diameter of the end of the driving rotor facing the wire inlet side is small.

[0032] Figure 9 This is a structural schematic diagram of the wire feeding mechanism of the present invention, where multiple extrusion rotors are arranged along the axial direction of the wire.

[0033] Figure 10 This is a structural schematic diagram of the wire feeding mechanism of the present invention, where the extrusion rotor has a large - at - both - ends - and - small - in - the - middle structure.

[0034] Figure 11 This is a structural schematic diagram of an embodiment of the wire feeding mechanism of the present invention, where the extrusion rotor is pushed towards the driving rotor by an elastic component.

[0035] Figure 12 This is a schematic diagram of the wire feeding mechanism of the present invention, where the elastic pushing member for pushing the extrusion rotor is a shrapnel structure.

[0036] Figure 13 This is a structural schematic diagram of the wire feeding mechanism of the present invention, which is provided with a side - clearance guiding stop.

[0037] Figure 14 This is a structural schematic diagram of an embodiment of the wire feeding mechanism of the present invention, where the extrusion rotor is pressed towards the driving rotor through an elastic component.

[0038] Figure 15 is at Figure 14 On the basis of, a schematic diagram of the driving rotor being arranged in an inclined shape and having a circular - ring convex - platform structure on the driving rotor.

[0039] Figure 16 isFigure 14 Top view.

[0040] Figure 17 Schematic structural diagram of an embodiment in the wire feeding mechanism of the present invention, where a balance frame and two extrusion rotors are provided and pressed against the driving rotor through an elastic component.

[0041] Figure 18 Schematic structural diagram of an embodiment in the wire feeding mechanism of the present invention, where the driving rotor presses against the extrusion rotor through an elastic component.

[0042] Figure 19 Explosion schematic diagram of an embodiment in the wire feeding mechanism of the present invention, where the driving rotor and the extrusion rotor are arranged inside the rotating part.

[0043] Figure 20 Explosion schematic diagram of an embodiment in the wire feeding mechanism of the present invention, where the driving rotor and the extrusion rotor are arranged below the rotating part.

[0044] Figure 21 Explosion schematic diagram of an embodiment in the wire feeding mechanism of the present invention, where the driving rotor and the extrusion rotor are arranged parallel to the wire axis inside the rotating part.

[0045] Figure 22 Explosion schematic diagram of an embodiment in the wire feeding mechanism of the present invention, where the driving rotor and the extrusion rotor are arranged parallel to the wire axis below the rotating part.

[0046] Figure 23 Schematic structural diagram of the wire feeding mechanism of the present invention, which is driven to rotate by a line angle coupling component, and the driving rotor and the extrusion rotor are arranged inside the rotating part.

[0047] Figure 24 Schematic structural diagram of the wire feeding mechanism of the present invention, which is driven to rotate by a line angle coupling component and move in one direction.

[0048] Figure 25 Schematic structural diagram of the wire feeding mechanism of the present invention, which is driven to rotate by a line angle coupling component and move in two directions. Detailed implementation manners

[0049] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0050] The present invention provides a wire feeding mechanism and method, which are mainly used to solve the problems in the solution given in US Patent Publication No. US20140159273A1, namely, the small biting point between the shaft (or roller) and the wire and the easy slippage of the bite between the shaft and the wire; it is also used to solve the problems in the solution given in US Patent Publication No. US7896209B2, that is, the wire is prone to wear and generate heat during the extrusion process, which easily leads to deformation or blockage of the wire feeding process; it is also used to solve the following problems in the technical solution disclosed in Chinese Patent Authorization Publication No. CN 113165826 B: when the rotation synchronization of multiple rotating components is inaccurate, the grooves formed by the multiple rotating components on the wire may not match each other, and warped grooves may be generated on the wire, affecting the transmission accuracy and speed. The mismatched setting of multiple rotating components may also increase the torsional moment on the wire, resulting in greater torsional deformation of the wire, which will also affect the transmission accuracy and speed. To accurately install and match the positional relationship between each rotating component, more precise machining and installation are required, which increases the cost. After using for a period of time, some wear may cause the matching relationship to change, and it may also cause the driving process of the wire to be uneven, affecting the long-term reliability of the extrusion operation; the very precise matching relationship between rotating components also poses relatively high requirements on the diameter accuracy of the wire. When the wire diameter changes greatly, it will also change the matching relationship between the rotating component and the wire, thereby affecting the feeding of the wire; multiple rotating components simultaneously bite the wire through their respective ridges, and the biting depths of multiple rotating components are generally different. Especially when the diameters of each rotating component are the same and are arranged obliquely relative to the wire, the cutting depth of one rotating component into the wire is usually deeper than that of other rotating components. With the rotation of multiple rotating components around the wire, this deviation will also cause the wire to swing back and forth between multiple rotating components, and it will also cause the torsional angle of the wire to change continuously even when multiple rotating components rotate around the wire at a constant speed, resulting in continuous change of the wire feeding speed, and the driving accuracy and driving smoothness of the wire need to be improved. The wire feeding mechanism and method of the present invention will be described below with reference to the accompanying drawings.

[0051] The present invention provides a wire feeding mechanism that can drive the wire to feed, that is, drive the wire to be conveyed along the axial direction of the wire. It includes a rotatable drive rotor with a protrusion structure on the outer periphery thereof; it also includes at least one rotatable extrusion rotor, and the outer peripheral surface of the extrusion rotor is smooth; for example, a smooth cylindrical surface, or one end of the cylinder has a smooth cylindrical surface with a variable diameter, a frustum surface, a columnar surface similar to a dumbbell shape with thick ends and a thin middle, or a columnar surface similar to a club shape with thin ends and a thick middle, etc. The smooth outer peripheral surface of the extrusion rotor can be a surface formed by a straight line or a curve rotating around an axis (the second axis), that is, at a point on the second axis and perpendicular to the second axis, the distance from the smooth outer peripheral surface to the second axis is equal in all directions; it also includes a channel that is at least partially located between the drive rotor and the extrusion rotor for the wire to move therein. The channel can be formed by the inner envelope surface formed by the circumferential movement of the drive rotor and the extrusion rotor around an axis (the third axis), or directly or extendedly formed by an inlet (such as an opening on a rotating frame) and / or an outlet (an opening on the rotating frame), or formed by a guiding tube with an opening at the side corresponding to the drive rotor and the extrusion rotor, or formed by enclosing the drive rotor, the extrusion rotor and a side clearance guide, or formed between and / or extendedly formed by an inlet pipeline and / or an outlet pipeline; the drive rotor and the extrusion rotor are arranged around the central axis of the channel, and the drive rotor and the extrusion rotor respectively have a preset distance from the central axis of the channel. The drive rotor and the extrusion rotor can rotate around the central axis of the channel, so that the drive rotor and the extrusion rotor roll on the surface of the wire. The surface of the extrusion rotor contacts the surface of the wire to limit the position of the wire. Specifically, the surface of the extrusion rotor contacts and rolls on the surface of the wire to limit the position of the wire. The protrusion structure on the outer periphery of the drive rotor can partially embed into the wire, and at the same time, the drive rotor rolls around the wire to drive the wire to feed and move along the channel. The distances from the corresponding points on the protrusion structure on the outer periphery of the drive rotor to the axis of the drive rotor are equal. The axis of the drive rotor (i.e., the self-axis of the drive rotor), that is, the first axis, and the rotation of the drive rotor is the rotation around the first axis. The axis of the extrusion rotor (i.e., the self-axis of the extrusion rotor), that is, the second axis, and the rotation of the extrusion rotor is the rotation around the second axis. The rotational movement of the drive rotor and the extrusion rotor around the central axis of the channel (or the axis of the wire) is the rotational movement of the first axis and the second axis around the central axis of the channel. The drive rotor and the extrusion rotor respectively have a preset distance from the central axis of the channel, that is, the first axis and the second axis have a preset distance from the central axis of the channel.

[0052] When the axis of the driving rotor is arranged parallel to the axis of the wire material or the axis of the channel, the protruding structure on the outer side of the driving rotor can adopt a spiral boss, such as a thread, and the thread can be a single-start thread or a multi-start thread. The pitch of the thread can be set according to the driving speed or other factors. When the driving rotor rolls around the wire material and at least part of the boss on it is embedded into the wire material to drive the wire material to feed, annular indentations may be formed on the surface of the wire material.

[0053] When the axis of the driving rotor is arranged at an angle to the axis of the wire material or the axis of the channel, the protruding structure on the outer side of the driving rotor can adopt an annular boss, and there is one or more annular bosses. When multiple annular bosses are used, the multiple annular bosses are arranged along the axial direction of the driving rotor, and the spacing can be set according to the driving speed or other factors. When the driving rotor rolls around the wire material and at least part of the boss on it is embedded into the wire material to drive the wire material to feed, spiral indentations may be formed on the surface of the wire material.

[0054] The axis of the extrusion rotor can be arranged parallel to the axis of the wire material (or the central axis of the channel), and the axis of the extrusion rotor can also be arranged at an angle to the axis of the wire material (or the central axis of the channel). This angle causes the extrusion rotor to rotate around its own axis and at the same time generate a component velocity in the direction of the axis of the wire material (or the central axis of the channel), and this angle causes the velocity direction of the velocity component of the extrusion rotor in the direction of the central axis of the channel to be consistent with the moving direction of the wire material (the feeding direction of the wire material or the driving direction of the driving rotor). Further optimally, this component velocity matches the velocity of the driving rotor driving the wire material to feed. For example, this angle can make the velocity component of the moving speed of the outer edge of the extrusion rotor in the direction of the axis of the wire material be substantially the same as the moving speed of the wire material along the axis of the wire material, with an error within ±50%, so that the extrusion rotor rolls on the wire material in the axial direction to avoid or reduce sliding friction.

[0055] The axis of the driving rotor is arranged parallel to the axis of the wire material or the axis of the channel. At the same time, the axis of the extrusion rotor can be arranged parallel to the axis of the wire material or the axis of the channel or at an angle.

[0056] The axis of the driving rotor is arranged at an angle to the axis of the wire material or the axis of the channel. At the same time, the axis of the extrusion rotor can be arranged parallel to the axis of the wire material or the axis of the channel or at an angle. And when arranged at an angle, optimally, the angle between the axis of the driving rotor and the axis of the wire material or the axis of the channel is equal to the angle between the axis of the extrusion rotor and the axis of the wire material or the axis of the channel.

[0057] There may be one or more extrusion rotors, and optimally, the driving rotor and one or more extrusion rotors are evenly arranged around the channel or the circumference of the wire, that is, they are arranged at equal angles or at equal intervals. The driving rotor and at least one extrusion rotor are evenly arranged around the central axis of the channel, which means that the contact points with the wire are evenly arranged around the axis. For example, when there is one extrusion rotor, the contact point between the extrusion rotor and the wire and the contact point between the driving rotor and the wire are corresponding to the central axis of the channel, or rotated 180 degrees. If there are two extrusion rotors, the two contact points between the extrusion rotor and the wire and the contact point between the driving rotor and the wire are staggered 120 degrees from each other. In the case of three extrusion rotors, they are staggered 90 degrees from each other, and so on. Alternatively, two extrusion rotors are arranged on both sides of a plane formed by a central axis of the channel and a vertical line perpendicular to the axis of the driving rotor or the axis of the driving rotor. Preferably, the axes of the two extrusion rotors have equal angles with the central axis of the channel (for example, 0 to 90 degrees, 0 degree represents parallelism), the axes of the two extrusion rotors have equal distances from the central axis of the channel, and the axes of the two extrusion rotors have equal distances from the axis of the driving rotor. Alternatively, three extrusion rotors are arranged in sequence around the central axis of the channel with the driving rotor, one of the extrusion rotors and the driving rotor are located on opposite sides of the central axis of the channel, and the other two extrusion rotors are arranged on both sides of a plane formed by a central axis of the channel and a vertical line perpendicular to the axis of the driving rotor or the axis of the driving rotor. The axes of the three extrusion rotors have the same angles with the central axis of the channel (for example, 0 to 90 degrees, 0 degree represents parallelism), the axes of the three extrusion rotors have equal distances from the central axis of the channel, and the axes of the other two extrusion rotors have equal distances from the axis of the driving rotor.

[0058] Examples of several specific embodiments are as follows. A driving rotor parallel to the wire material or the feeding pipe and two extrusion rotors respectively arranged at an angle with the wire material or the feeding pipe are arranged around the central axis of the wire material or the channel. Threads are provided on the outer side of the driving rotor. Preferably, the axes of the two extrusion rotors are respectively at equal angles with the central axis of the channel, the distances from the axes of the two extrusion rotors to the central axis of the channel are equal, and the distances from the axes of the two extrusion rotors to the axis of the driving rotor are equal. Or, a driving rotor parallel to the wire material or the feeding pipe and two extrusion rotors respectively arranged parallel to the wire material or the feeding pipe are arranged around the central axis of the wire material or the channel. Threads are provided on the outer side of the driving rotor. Preferably, the distances from the axes of the two extrusion rotors to the central axis of the channel are equal, and the distances from the axes of the two extrusion rotors to the axis of the driving rotor are equal. Or, a driving rotor arranged at an angle with the wire material or the feeding pipe and two extrusion rotors respectively arranged at an angle with the wire material or the feeding pipe are arranged around the central axis of the wire material or the channel. An annular boss is provided on the outer side of the driving rotor. Preferably, the axes of the two extrusion rotors are respectively at equal angles with the central axis of the channel, the distances from the axes of the two extrusion rotors to the central axis of the channel are equal, and the distances from the axes of the two extrusion rotors to the axis of the driving rotor are equal. Or, an extrusion rotor and a driving rotor are adopted. The driving rotor and the extrusion rotor are respectively arranged parallel to the wire material or the channel. Side gap guides or thin rotating shafts can also be respectively arranged at the side gaps on both sides of the gap formed by the driving rotor and the extrusion rotor. The thin rotating shafts can rotate freely around their own axes. The thin rotating shafts can be understood as thin extrusion rotors. Or a guiding pipe is provided. The guiding pipe rotates around the central axis of the channel together with the driving rotor and the extrusion rotor. For example, the guiding pipe is fixedly connected to the rotating frame, can be coaxially arranged with the through hole on the rotating frame, and an opening is provided at the side position of the guiding pipe facing the driving rotor and the extrusion rotor to avoid the driving rotor and the extrusion rotor. The wire material moves in the guiding pipe. When the axis of the extrusion rotor is arranged at an angle with the axis of the wire material, the extrusion rotor can mainly roll on the surface of the wire material. For example, this angle can make the velocity component of the movement speed of the outer edge of the extrusion rotor in the direction of the axis of the wire material be substantially the same as the movement speed of the wire material along the axis of the wire material.

[0059] An elastic member can also be used to push or pull the extrusion rotor towards the driving rotor, or an elastic member can be used to push or pull the driving rotor towards the extrusion rotor.

[0060] When the axis of the driving rotor is arranged parallel to the axis of the wire material or the axis of the channel, the diameter of the driving rotor near the inlet can be smaller and smoothly transition towards the outlet direction to increase the diameter to the normal diameter, or the driving rotor can be arranged to be outwardly inclined, that is, the axis of the driving rotor and the axis of the wire material are generally coplanar, and the driving rotor near the inlet is farther from the axis of the wire material than the outlet. This can facilitate the initial loading of the wire material from the inlet and make it easier to engage with the driving rotor to drive the wire material towards the outlet at the initial stage. When the wire material just engages with the driving rotor, the embedding depth of the driving rotor into the wire material is shallower, and then the wire material is driven to move towards the outlet direction. At the same time, the cutting depth of the wire material increases until a constant value. This can make the wire material easier to be introduced, and the introduction process is stable with a small torsional amplitude of the wire material.

[0061] When the axis of the extrusion rotor is arranged parallel to the axis of the wire material or the axis of the feeding channel, the extrusion rotor can also be in the shape of a mallet with thinner ends and thicker middle, or the diameter of the extrusion rotor near the inlet side is smaller and smoothly transitions to the normal diameter towards the outlet direction, which is convenient for the introduction of the wire material.

[0062] When the axis of the extrusion rotor is arranged at an angle with the axis of the wire material or the axis of the feeding channel, the extrusion rotor can also have a larger diameter at the two ends along the axis and a smaller diameter in the middle. Thus, when the extrusion rotor is arranged obliquely relative to the axis of the wire material, the middle part of the extrusion rotor extrudes the wire material, and the two ends can also increase the contact with the wire material and can also extrude the wire material towards the direction of the driving rotor or guide the wire material to be conveyed axially.

[0063] The driving rotor and the extrusion rotor are respectively rotatably arranged on the rotating frame. The rotating frame has a through opening (which can be a through hole or a groove, as long as it is a channel structure that allows the wire material to pass through) to allow the wire material to pass through. By driving the rotating frame to rotate around the central axis of the wire material or the channel, the driving rotor and the extrusion rotor are driven to rotate circumferentially around the central axis of the wire material or the channel, so that the driving rotor and the extrusion rotor roll on the wire material and drive the wire material to move axially.

[0064] The lower part and the upper part of the rotating frame are arranged. The rotating frame can also only retain one of the upper part or the lower part, and can only have the upper part or the lower part, or can also include both the upper part and the lower part. It can also drive the driving rotor and the extrusion rotor to rotate around the axis of the wire material. At the same time, due to the rolling on the wire material, the driving rotor and the extrusion rotor are respectively driven to rotate along their respective axes. Especially when both the driving rotor and the extrusion rotor are shorter along the axis or have a larger diameter, bearings can be respectively arranged on the upper part of the rotating frame to respectively install the driving rotor and the extrusion rotor; when both the driving rotor and the extrusion rotor are longer along the axis or have a smaller diameter, the lower part of the rotating frame can be increased to further install the rotatable driving rotor and extrusion rotor. The lower part and the upper part of the rotating frame can be fixedly connected together, for example, through a connecting part or a central wheel, etc., to enhance the stability of the driving rotor and the extrusion rotor.

[0065] A wire-angle coupling mechanism can be used to drive the rotation of the rotating frame. The central wheel of the wire-angle coupling mechanism has a through hole through which the wire material or the feeding pipe can pass. Alternatively, a motor can drive a synchronous belt to drive the rotation of the rotating frame, or the motor can drive the rotating frame through a gear pair, or a motor with a rotor having a through hole can be used, and the rotor of the motor is fixedly connected coaxially with the rotating frame to drive the rotation of the rotating frame. The through hole can allow the wire material or the feeding pipe to pass through, or other means can be used to drive the rotation of the rotating frame.

[0066] The following measures can also be set to prevent or reduce the torsion of the wire material during feeding: 1. Two sets of driving rotors and extrusion rotors can also be set. The two sets of driving rotors and extrusion rotors are respectively arranged on two rotating frames, namely the first rotating frame and the second rotating frame, and the rotation directions of the first rotating frame and the second rotating frame around the wire material or the channel are opposite. For example, the first set of driving rotors and extrusion rotors are set to rotate clockwise with the first rotating frame, and the second set of driving rotors and extrusion rotors are set to rotate counterclockwise with the second rotating frame. In this way, the torsional effects generated by the first set of driving rotors and extrusion rotors and the second set of driving rotors and extrusion rotors on the wire material cancel each other out, and the torsion of the wire material during the feeding driven by the extruder can be greatly reduced. And / or, 2. Anti-torsion extrusion wheels are used. For example, a pair of anti-torsion extrusion wheels clamp the wire material between the two anti-torsion extrusion wheels. When the wire material moves axially, it drives the two anti-torsion extrusion wheels to rotate along their respective axial directions. However, since the two anti-torsion extrusion wheels do not rotate around the circumference of the wire material, the torsional movement of the wire material around its own axis will be limited by the extrusion action of the two anti-torsion extrusion wheels; and / or, 3. The feeding pipe for conveying the wire material is bent; and / or, 4. Stripes along the axial direction are provided on the inner wall of the inlet pipe or the outlet pipe. The inlet pipe refers to the pipe that guides the wire material into the inlet at the upstream position (the position relatively far from the outlet side with respect to the inlet) of the inlet of the wire material, and the outlet pipe refers to the pipe that guides the wire material led out from the outlet to move at the downstream position (the position relatively far from the inlet side with respect to the outlet) of the outlet of the wire material. The inlet may be a through hole (such as a through hole) on the rotating frame, or a part of the pipe of the channel that enters the area between the driving rotor and the extrusion rotor in the channel. The outlet may be a through hole (such as a through hole) on the rotating frame or a part of the pipe of the channel that moves out of the area between the driving rotor and the extrusion rotor. The inlet and the outlet can rotate around the wire material with the driving rotor and the extrusion rotor, and the inlet pipe and the outlet pipe do not rotate around the wire material with the driving rotor and the extrusion rotor. The inlet pipe and the outlet pipe can be fixedly connected to the base.

[0067] The following combines Figure 1 and Figure 2 , and the structure of the wire material feeding mechanism of the present invention will be described.

[0068] As Figure 1As shown in the figure, the wire feeding mechanism (or extruder) of the present invention includes a driving rotor 21 and an extrusion rotor 22. The driving rotor 21 can rotate around its own axis 212, and a convex structure 211 is provided on the outer periphery of the driving rotor 21; the number of extrusion rotors 22 is at least one, and the extrusion rotor 22 can rotate around its own axis 221. The extrusion rotor 22 and the driving rotor 21 are arranged around the wire 10 or the axis 11 and can move circumferentially around the wire ring. A channel for the wire 10 to pass through is formed between the extrusion rotor 22 and the driving rotor 21. This channel can be a channel formed by the envelope surface inside the rotational movement of the driving rotor and the extrusion rotor around an axis (such as Figure 1 or Figure 2 the axis 11 in Figure 2 or the axis of the wire 10). The surface of the extrusion rotor 22 is smooth, and the extrusion rotor 22 is in contact with the wire 10. The convex structure 211 of the driving rotor 21 can be partially embedded into the wire 10, and then, as the axis of the driving rotor rotates around the wire 10 or the central axis 11 of the channel, the driving rotor rolls on the surface of the wire to drive the wire to feed and move along the channel. The axis 11 is both the central axis of the channel and the central axis of the part of the wire 10 passing through the channel or the part of the wire 10 limited by the extrusion rotor.

[0069] In the wire feeding mechanism of the present invention, the extrusion rotor 22 with a smooth outer surface is provided, and the wire 10 is limited by being attached to the outer surface of the extrusion rotor 22. Then, the driving rotor 21 and the extrusion rotor 22 rotate around the wire and rotate along their own axes to drive the wire to feed and move. When in use, the wire feeding mechanism can be installed on the support of the mechanical equipment that requires the wire.

[0070] The feeding direction of the wire 10 can be controlled by the rotational movement direction of the extrusion rotor 22 and the driving rotor 21 around the wire. The wire 10 can either move forward or backward in the channel. The wire 10 enters from one side of the channel, for example, this side is defined as the inlet side, and the wire 10 exits from the other side of the channel, for example, the other side is defined as the outlet side. Preferably, the wire 10 can be wound on a spool. When feeding the wire 10, the end of the wire 10 can be inserted into the channel between the extrusion rotor 22 and the driving rotor 21, and then the extrusion rotor 22 and the driving rotor 21 drive the wire to feed and move through the rotational movement around the wire 10, and the spool rotates as the wire is fed to release the wire.

[0071] In a specific embodiment of the present invention, the driving rotor 21 and at least one extrusion rotor 22 are evenly arranged around the wire 10. In Figure 1In the illustrated embodiment, the wire feeding mechanism includes a driving rotor 21 and an extrusion rotor 22. The driving rotor 21 and the extrusion rotor 22 are uniformly arranged around the circumference of the wire 10. For example, the driving rotor 21 and the extrusion rotor 22 are arranged at an angle of 180 degrees to each other. In Figure 2 In the illustrated embodiment, the wire feeding mechanism includes a driving rotor 21 and two extrusion rotors 22. The driving rotor 21 and the extrusion rotors 22 are uniformly arranged around the circumference of the wire 10. For example, they are arranged in a circumferential pattern with an angular spacing of 120 degrees from each other; or the distances between the respective own axes 221 (or called the second axes) of the two extrusion rotors 22 and the own axis 212 (or called the first axis) of the driving rotor 21 are arranged in an equal manner. Preferably, the distances from the respective own axes 221 (or called the second axes) of the two extrusion rotors 22 to the central axis 11 of the channel are equal.

[0072] Figure 1 and Figure 2 In the illustrated embodiment, both the driving rotor 21 and the extrusion rotor 22 are arranged at an angle to the wire 10. The protruding structure 211 on the driving rotor 21 is a circular ring boss arranged along the axial direction of the driving rotor 21. Preferably, the circular ring bosses are arranged at equal intervals along the axial direction of the driving rotor 21. The intervals between the multiple circular ring bosses arranged along the axial direction of the driving rotor 21 can be set according to the driving speed or other factors. When driving the wire 10 to feed, the driving rotor 21 and the extrusion rotor 22 rotate around the wire 10 together. The protruding structure 211 part of the driving rotor 21 cuts into the wire 10. As the driving rotor 21 rolls around the wire 10, spiral indentations or grooves are formed on the surface of the wire 10, driving the wire 10 to move along the axial direction of the wire 10. It should be noted here that the axis of the wire 10 is consistent with the central axis of the channel. The central axis of the wire 10 is the central axis of the part of the wire 10 located in the channel. The part of the wire 10 located in the channel, especially the part limited by the extrusion rotor, is straight. The axial direction of the wire 10 is the setting direction along the central axis 11. During the process of driving the wire 10 to feed, the extrusion rotor 22 presses the wire 10 against the driving rotor 21 with an appropriate pressure or at an appropriate spacing from the wire 10 to ensure that the protruding structure 211 of the driving rotor 21 can cut into the wire 10 with an appropriate depth.

[0073] Figure 1 and Figure 2 In the illustrated embodiment, the axis 221 of the extrusion rotor 22 can also be arranged parallel to the central axis 11 of the wire 10. That is, the protruding structure 211 provided on the driving rotor 21 is in a ring shape and is spaced apart on the outer periphery of the driving rotor 21. The axis 212 of the driving rotor 21 is arranged at an angle to the central axis 11 of the channel or the central axis of the wire 10. At the same time, the extrusion rotor 22 is arranged parallel to the central axis 11 of the channel. For reference,Figure 7 or Figure 8 the state of the extrusion rotor 22 in Figure 7 . Or refer to Figure 5 and let Figure 5 the extrusion rotor in Figure 5 be arranged parallel to the axis of the wire material, and the axes of the driving rotor, the central axis of the channel, and the axis of the extrusion rotor are coplanar. The advantage of arranging the extrusion rotor parallel to the axis of the wire material or the central axis of the channel is that the wire material 10 can contact the extrusion rotor over a longer dimension in the axial direction, and the limiting effect of the extrusion rotor on the wire material at different axial positions is uniform. This is not only more conducive to the precise positioning of the wire material, but also the deviation or variation of the driving rotor 21 (whether arranged at an angle or parallel to the wire material) at different axial positions has almost no impact on the driving effect of the wire material. Thus, it is more conducive to the stability and feeding accuracy of the wire material feeding process. For example Figure 5 the extrusion rotor 22 in Figure 5 can be arranged parallel to the wire material or the channel in terms of axis. In the figure, the wire material abuts against the smooth cylindrical surface of the extrusion rotor 22 on the right side to achieve precise positioning. The boss structure 211 of the driving rotor 21 on the left side is partially embedded in the wire material 10 to drive the wire material to move along the axis. Regardless of how the depth of the boss structure 211 embedded in the wire material 10 changes, the wire material 10 will stably abut against the smooth surface of the extrusion rotor 22 on the right side, and the positioning process always remains precise, ensuring the accuracy and stability of the wire material feeding process. In addition, when the extrusion rotor 22 is arranged parallel to the axis of the wire material or the channel, in the direction perpendicular to the axis of the wire material or the channel, the size of the feeder is very small. For example, refer to Figure 21 , when the driving rotor and the extrusion rotor are arranged in the through-channel 2611 of the rotating member 261 (or the central wheel), the diameter of the through-channel of the rotating member 261 can be smaller, and the synchronous pulley outside the rotating member 261 can be smaller, making the size of the driving assembly smaller. When this feeder is arranged on the 3D printing head of the 3D printing device, the size of the printing head can be made smaller, that is, the dimension along the axis of the rotating member 261 is reduced and the dimension perpendicular to the axial direction is also reduced.

[0074] In another embodiment of the present invention, as shown in Figure 3 , the raised structure 211 provided on the driving rotor 21 is helical, such as a thread, and the axis 212 of the driving rotor 21 is arranged parallel to the central axis of the channel; Figure 3 schematically shows that the axis of the extrusion rotor 22 is arranged at an angle to the axis of the wire material.

[0075] Of course, the axis 221 of the extrusion rotor 22 can also be arranged at a certain angle to the central axis 11 of the channel or parallel to the central axis 11 of the channel.

[0076] Specifically, the driving rotor 21 and the extrusion rotor 22 can be arranged at an angle with respect to the central axis of the wire material 10, or can be arranged parallel to the central axis of the wire material 10. When the axis of the extrusion rotor 22 is arranged at an angle with respect to the central axis of the wire material 10, preferably, the included angle between the axis of the extrusion rotor 22 and the central axis of the wire material 10 is such that the extrusion rotor 22 maintains rolling contact with the surface of the wire material 10. For example, this angle can make the velocity component of the tangential movement of the contact point between the outer periphery of the extrusion rotor and the wire material in the direction of the wire material axis substantially the same as the movement velocity of the wire material along the central axis of the wire material.

[0077] When the axis of the extrusion rotor 22 is arranged at an angle with respect to the central axis 11 of the wire material 10, this set angle causes the extrusion rotor 21 to generate a component velocity in the direction of the central axis 11 of the wire material 10 while rotating about its own axis, and the direction of this component velocity is consistent with the feeding movement direction of the wire material 10. Further, this component velocity is matched with the velocity at which the driving rotor 21 drives the wire material 10 to feed. For example, this set angle can make the velocity component of the movement velocity of the outer edge of the extrusion rotor 22 in the direction of the central axis of the wire material 10 substantially the same as the movement velocity of the wire material 10 along the central axis.

[0078] Figures 3 to 5 In the illustrated embodiment, the wire material feeding mechanism includes a driving rotor 21 and an extrusion rotor 22. The axis of the driving rotor 21 is arranged substantially parallel to the central axis of the wire material 10 or the central axis of the channel. The convex structure 211 provided on the outer periphery of the driving rotor 21 is helical, such as a thread, which can be a single-start thread or a multi-start thread. The pitch of the thread can be set according to the driving speed or other factors. The axis of the extrusion rotor 22 is arranged at an angle with respect to the central axis of the wire material 10 or the central axis of the channel, and of course, it can also be arranged in parallel.

[0079] Figure 6 In the illustrated embodiment, the wire material feeding mechanism includes a driving rotor 21 and two extrusion rotors 22. The axis of the driving rotor 21 is arranged substantially parallel to the central axis of the wire material 10 or the central axis of the channel. The convex structure 211 provided on the outer periphery of the driving rotor 21 is helical. The two extrusion rotors 22 are arranged at an angle with respect to the wire material 10. Optimally, the driving rotor 21 and the extrusion rotors 22 are evenly arranged around the circumference of the wire material, or are arranged in such a way that the distances from the axes of the two extrusion rotors 22 to the axis of the driving rotor 21 are equal, and the distances from the axes of the two extrusion rotors 22 to the axis of the wire material 10 or the central axis of the channel are equal.

[0080] In a specific embodiment of the present invention, as Figure 1 shown, the outer contour of the extrusion rotor 22 is cylindrical;

[0081] Alternatively, when the axis of the extrusion rotor 22 is arranged parallel to the central axis of the channel, the outer contour of the extrusion rotor 22 is in the shape of a club with thinner ends and thicker middle; or the outer contour of the extrusion rotor 22 is in the shape of a truncated cone with a smaller diameter on the side near the wire inlet and a larger diameter at the other end; or the outer contour of the extrusion rotor has a smaller diameter at a section near the wire inlet end and gradually transitions to a cylindrical shape in the direction away from the inlet; or, as Figure 10 shown, when the axis of the extrusion rotor 22 is arranged at an angle to the central axis of the channel, the outer contour of the extrusion rotor 22 is a column with a variable cross-section having larger diameters at both ends and a smaller diameter in the middle.

[0082] The outer contour of the driving rotor 21 is preferably cylindrical. Alternatively, when the axis of the driving rotor 21 is arranged parallel to the central axis of the wire 10, the diameter of the driving rotor 21 near the inlet side is smaller than that near the outlet side, and the diameter of the driving rotor 21 gradually and smoothly increases from the inlet end to the outlet end over a certain length near the inlet end, as Figure 8 shown. Or the driving rotor 21 can be arranged to be inclined outward, that is, the axis of the driving rotor 21 and the axis of the wire 10 are generally coplanar, and the end of the driving rotor near the inlet side is farther from the axis of the wire 10 than the end near the outlet side, as Figure 7 shown. In this way, it is convenient to load the wire 10 from the inlet end, and the wire is easier to engage and be driven by the driving rotor at the beginning stage.

[0083] Figure 7 In the embodiment shown, the wire feeding mechanism includes a driving rotor 21 and two extrusion rotors 22. The axes of the two extrusion rotors 22 are also arranged parallel to the axis of the wire 10 or the central axis of the channel. The raised structure 211 provided on the outer periphery of the driving rotor is spiral. The driving rotor 21 is arranged to be inclined in an outward-opening manner. The axis of the driving rotor 21 and the central axis of the wire 10 are generally coplanar. The distance from the end of the driving rotor 21 near the inlet side to the central axis of the wire 10 is greater than the distance from the end near the outlet side to the central axis of the wire 10. In this way, it is convenient to load the wire 10 from top to bottom.

[0084] Figure 8 In the embodiment shown, the wire feeding mechanism includes a driving rotor 21 and two extrusion rotors 22. The axis of the driving rotor is arranged parallel to the axis of the wire 10 or the central axis of the channel. The axes of the two extrusion rotors 22 are also arranged parallel to the axis of the wire 10 or the central axis of the channel. The raised structure 211 provided on the outer periphery of the driving rotor is spiral. The diameter of the driving rotor 21 at a section near the inlet side of the wire 10 is smaller than the diameter at a section near the outlet side of the wire 10, which is convenient for loading the wire from top to bottom.

[0085] Figure 7 and Figure 8In the illustrated embodiment, the axis of the extrusion rotor 22 is parallel to the central axis of the wire material 10. During the process of driving the feeding of the wire material 10, the wire material 10 can always be in contact with the smooth surface of the extrusion rotor 22. It can be reliably positioned by the extrusion rotor 22 in the direction perpendicular to the axis of the wire material 10. The wire material 10 can feed very stably along the central axis direction of the wire material 10 during the feeding process. By making the wire material contact the smooth surface of the extrusion rotor, the conveyance of the wire material along the axis can be effectively controlled, avoiding the wire material from wobbling during the process from the inlet to the outlet. Moreover, even if the driving rotor changes its axial position, it will not affect the driving and feeding accuracy and stability of the wire material at all, and it has extremely strong robustness to the axial position change of the driving rotor. Of course, the axis of the extrusion rotor 22 can also be set at an angle to the central axis of the wire material.

[0086] Figure 10 In the illustrated embodiment, the wire material feeding mechanism includes a driving rotor 21 and an extrusion rotor 22. The extrusion rotor 22 is arranged at an angle to the wire material. The extrusion rotor 22 is a columnar body with a variable cross-section that is larger in diameter at both ends and smaller in the middle. The part with a smaller diameter in the middle corresponds to the wire material 10 or the driving rotor 21. In this way, the contact area or contact length between the extrusion rotor 22 and the wire material 10 can be increased, which is beneficial for extruding and pressing a longer wire material against the driving rotor 21, so that more or longer parts of the protruding structure 211 on the driving rotor 21 can participate in cutting into the surface of the wire material, increasing the driving force for the feeding of the wire material. In the figure, it is shown that the driving rotor is arranged parallel to the wire material, and the protruding structure 211 on the outer periphery of the driving rotor is spiral. The driving rotor 21 and the wire material 10 can also be arranged parallel, and the protruding structure on the outer periphery of the driving rotor can be circular.

[0087] In a specific embodiment of the present invention, as Figure 9 shown, the axis of the driving rotor 21 is arranged parallel to the central axis of the channel. The protruding structure 211 arranged on the outer periphery of the driving rotor is spiral. The number of extrusion rotors 22 is at least two, and at least two extrusion rotors 22 are arranged along the axial direction of the driving rotor 21. The length of the driving rotor 21 is greater than the sum of the lengths of the two extrusion rotors 22. The axis of the driving rotor 21 is arranged parallel to the central axis of the wire material 10, and the protruding structure 211 on the driving rotor 21 is spiral such as a thread. The two extrusion rotors 22 are arranged along the setting direction of the central axis of the wire material 10. The two extrusion rotors 22 are arranged on the side of the wire material 10 relatively far from the driving rotor 22 and are arranged corresponding to the driving rotor 22. The axes of the two extrusion rotors 22 are arranged at an angle to the central axis of the wire material 10. At least two extrusion rotors 22 are arranged along the axial direction of the driving rotor 21. The multiple extrusion rotors 22 arranged along the central axis direction of the wire material 10 respectively extrude the wire material 10 towards the driving rotor 21, which can increase the number of engagement points between the wire material 10 and the driving rotor 21 and increase the driving force for the feeding of the wire material.

[0088] In a specific embodiment of the present invention, as Figure 11 shown, the wire feeding mechanism of the present invention further includes an elastic component 23 connected to the driving rotor 21 or the extrusion rotor 22, which is used to drive the driving rotor 21 or the extrusion rotor 22 to approach the axis direction of the wire 10.

[0089] Since there is no need to consider synchronous processing between the driving rotor and the extrusion rotor, the elastic component can push or pull the extrusion rotor or the driving rotor in the direction of the wire (or towards the central axis of the channel). The driving force on the wire can be adjusted by the acting force of the elastic component, and it is not sensitive to the diameter accuracy of the wire, with a wide range of applications.

[0090] Furthermore, as Figure 11 and Figure 12 shown, the elastic component 23 includes an elastic pushing member 231 connected to the driving rotor 21 or the extrusion rotor 22, and the elastic pushing member 231 pushes the driving rotor 21 or the extrusion rotor 22 in the direction of the wire 10;

[0091] Or, as Figure 14 and Figure 15 shown, the elastic component 23 includes a swingable lever 232 and a spring 233 connected to the lever 232. The driving rotor 21 or the extrusion rotor 22 is rotatably mounted on the lever 232, and the spring 233 pushes the lever 232 in the direction of the wire 10, and the lever 232 drives the driving rotor 21 or the extrusion rotor 22 to approach the wire 10;

[0092] Or, as Figure 17 shown, the elastic component 23 includes a swingable lever 232, a spring 233 connected to the lever 232, and a balance frame 234 swingably arranged on the lever 232. The number of extrusion rotors 22 is at least two, which are respectively rotatably arranged on the balance frame 234. The spring 233 pushes the lever 232 in the direction of the wire 10, and then the lead screw 232 drives the balance frame 234 and the extrusion rotors 22 thereon to approach the wire 10.

[0093] Figure 11 Or Figure 13In the illustrated embodiment, the elastic component 23 includes two elastic pushing members 231 which are connected to both ends of the extrusion rotor 22. The elastic pushing member 231 is a cylindrical spring in this embodiment. Bearings 252 are connected to both ends of the extrusion rotor 22, and the elastic pushing member 231 is connected to the bearings 252; alternatively, bearings 252 can be connected to at least one end of the extrusion rotor 22, and the elastic pushing member 231 is connected to the corresponding bearings 252. The elastic pushing member 231 pushes the extrusion rotor 22 towards the wire material 10 with a certain pressure, causing the wire material 10 to abut against the driving rotor 21. When the bearings 252 connected to the ends of the extrusion rotor 22 are rotatably mounted on a support or a rotating frame, an adjustment groove can be provided at the mounting position. The adjustment groove is arranged in the direction towards the wire material, such that the bearings 252 connected to the extrusion rotor 22 can slide along the adjustment groove, causing the extrusion rotor 22 to abut against the wire material 10.

[0094] Figure 12 In the illustrated embodiment, the elastic pushing member 231 is an elastic sheet. The end of the extrusion rotor 22 is connected to a bearing 252 which slides in an adjustment groove 253 provided on a support or a rotating frame 25. The adjustment groove 253 extends in the direction towards the wire material, or the adjustment groove 253 can communicate with the channel through which the wire material 10 passes. The middle part of the elastic sheet abuts against the bearing 252, and one end or both ends of the elastic sheet are connected to corresponding parts of the support or the rotating frame 25. The middle part of the elastic sheet applies an elastic force to the bearing 252, causing the bearing 252 to move along the adjustment groove 253 towards the direction closer to the wire material 10. Alternatively, one end of the elastic sheet is connected to the support or the rotating frame 25, and the other end presses the bearing 252.

[0095] Figure 14 In the illustrated embodiment, the elastic component 23 includes a lever 232 and a spring 233. One end of the extrusion rotor 22 is rotatably provided on the lever 232. For example, the extrusion rotor 22 is mounted on the lever 232 in a region near the middle through a bearing 252. For example, a mounting hole can be provided in the middle of the lever 232, and the bearing 252 is mounted in the mounting hole. As Figures 14 to 16As shown, on one side of the lever 232, there is an outwardly protruding mounting portion 2322. The mounting portion 2322 is rotatably connected to the support or rotating frame 25 through a vertical rod 2321, and the lever 232 can rotate around the vertical rod 2321. On the other side of the lever 232, there is an outwardly protruding connecting portion 2323. The connecting portion 2323 is disposed opposite to the mounting portion 2322. A spring 233 is connected at the connecting portion 2323. At the support or rotating frame 25, an end stop 254 is provided corresponding to the other end of the spring 233. The spring 233 is supported and connected between the end stop 254 and the connecting portion 2323. The spring 233 pushes the connecting portion 2323 to cause the lever 232 to rotate around the vertical rod 2322, and the lever 232 drives the extrusion rotor 22 thereon to rotate towards the direction close to the wire material 10. The connecting portion 2323 and the mounting portion 2322 can be located on both sides of the wire material 10. In this embodiment, the axis of the driving rotor 21 is arranged parallel to the axis of the wire material 10. A bearing 252 is provided at the bottom of the driving rotor 21 and is mounted on the support or rotating frame 25 through the bearing 252. Figure 15 In the embodiment shown, different from Figure 14 the embodiment, the axis of the driving rotor 21 is arranged at an angle with the axis of the wire material 10. Figure 14 and Figure 15 In the embodiment shown, the extrusion force of the extrusion rotor 22 on the wire material can be adjusted by adjusting the position of the end stop 254 or the elastic force of the spring 233. Figure 14 and Figure 15 The extrusion rotor in

[0096] can be replaced with a driving rotor, and at the same time, the driving rotor is replaced with an extrusion rotor. Two or more extrusion rotors 22 can also be provided on the lever 232. For example, two extrusion rotors 22 can be rotatably mounted on the lever 232. Preferably, the distances from the axes of the two extrusion rotors 22 to the axis of the driving rotor are substantially equal during the normal extrusion and feeding of the wire material, and the two extrusion rotors can also be arranged at an angle with the wire material.

[0097] Figure 17 In the embodiment shown, a balance frame 234 is provided. The balance frame 234 is swingably mounted on the lever 232, and two extrusion rotors 22 are rotatably mounted on the balance frame 234. For example, the extrusion rotor 22 can be mounted on the balance frame 234 through a bearing. The balance frame 234 can be rotatably mounted on the lever 232 through a shaft 2341. The shaft 2341 is substantially parallel to the central axis of the wire material 10, and the connection line between the shaft 2341 and the wire material 10 is located between the axes of the two extrusion rotors. The mounting structure of the lever 232 and the spring 233 can refer to Figure 14In the installation structure of the illustrated embodiment, when the lever 232 presses the balance frame 234 towards the driving rotor 21 under the action of the spring 233, the balance frame 234 drives the extrusion rotor 22 to press against the driving rotor 21. And since the balance frame 234 can swing relative to the lever 232 about the axis 2341, the acting forces of the two extrusion rotors 22 on the wire material 10 or on the driving rotor 21 can be automatically balanced and adjusted.

[0098] Figure 18 In the illustrated embodiment, the driving rotor 21 is rotatably mounted on the lever 232, and the extrusion rotors 22 are rotatably arranged on the support or the rotating frame 25. There are two extrusion rotors 22. Of course, the number of the extrusion rotors 22 can also be set to one or more. The installation structure of the lever 232 and the spring 233 is the same as that Figure 14 in the installation structure of the illustrated embodiment. The spring 233 pushes against the lever 232, and the lever 232 swings around the vertical rod 2321, driving the driving rotor 21 to press against the wire material 10 or the extrusion rotor 22.

[0099] Figure 11 and Figure 12 the elastic components shown in can act on the driving rotor 21 to push the driving rotor 21 in the direction towards the wire material 10 or the extrusion rotor 22. Figure 2 and Figure 6 In, the two extrusion rotors 22 are both rotatably mounted on a moving frame, and the moving frame can move in a direction substantially perpendicular to the wire material. The elastic component 23 acts on the moving frame to push the moving frame in the direction towards the wire material or the driving rotor, so as to push the two extrusion rotors together in the direction towards the driving rotor. Figure 14 The elastic component 23 in can act on the driving rotor 21 to make the lever 232 drive the driving rotor to press in the direction towards the wire material.

[0100] In a specific embodiment of the present invention, as shown in Figure 13 , the wire material feeding mechanism of the present invention further includes a side gap guide 24 provided between the extrusion rotor 22 and the driving rotor 21, and the side gap guide 24 is arranged around the central axis of the channel. The side gap guide 24 can rotate around the wire material 10 together with the extrusion rotor 22 and the driving rotor 21.

[0101] Figure 13In the illustrated embodiment, there is one extrusion rotor 22. Side clearance guiding blocks 24 are arranged on both sides of the area between the extrusion rotor 22 and the driving rotor 21, so that the wire material 10 can be better positioned between the extrusion rotor 22 and the driving rotor 21 during the feeding process. The side clearance guiding blocks 24, the extrusion rotor 22, and the driving rotor 21 enclose a channel for the wire material to pass through. The surface of the side clearance guiding block 24 in contact with the wire material 10 is a smooth surface, which can reduce the frictional resistance. The middle part of the side clearance guiding block 24 is provided with a protruding slotting structure towards the gap between the extrusion rotor and the driving rotor, and the surface of the slotting structure close to the extrusion rotor and the driving rotor is an arc surface. Of course, the side clearance guiding block 24 can also be of other structures. For example, a roller shaft with a diameter adapted to the size of the gap between the extrusion rotor and the driving rotor is used. The roller shaft can roll relative to the wire material 10 when blocking the wire material 10 to prevent lateral deviation, reducing the resistance. In this embodiment, both the extrusion rotor 22 and the driving rotor 21 are arranged parallel to the wire material. Of course, the extrusion rotor 22 and the driving rotor 21 can also be arranged at an angle to the wire material, and in this case, the shape or installation angle of the side clearance guiding block 24 needs to be adjusted adaptively.

[0102] Figure 5 In the illustrated embodiment, the wire material feeding mechanism further includes a guiding tube 31. The guiding tube 31 rotates around the central axis of the channel together with the driving rotor 21 and the extrusion rotor 22. Openings are respectively arranged at the positions of the guiding tube 31 facing the driving rotor 21 and the extrusion rotor 22 for avoiding the driving rotor 21 and the extrusion rotor 22, and the wire material 10 moves in the guiding tube 31.

[0103] In a preferred embodiment, as Figure 24 shown, the wire material feeding mechanism of the present invention further includes a pair of rotatable anti-twist extrusion wheels 28. The pair of anti-twist extrusion wheels 28 are symmetrically arranged on both sides of the wire material 10. The anti-twist extrusion wheels 28 are arranged vertically. The anti-twist extrusion wheels 28 are arranged above the inlet side of the channel. The anti-twist extrusion wheels 28 can rotate around their own axes but cannot rotate around the circumference of the wire material, that is, the anti-twist extrusion wheels do not prevent the wire material from moving axially but will prevent the wire material from twisting. Preferably, the anti-twist extrusion wheels 28 are rotatably mounted on the base or the moving seat 2645. Of course, the anti-twist extrusion wheels 28 can also be arranged at the outlet side of the channel.

[0104] In a preferred embodiment, a feeding tube is arranged above the inlet side of the channel. One end of the feeding tube is communicated with the channel. The feeding tube is bent, and the wire material enters the channel through the feeding tube. In this way, the feeding tube can prevent the wire material from twisting during the feeding process.

[0105] In a preferred embodiment, as Figure 5As shown, an inlet pipe 32 is provided above the channel and / or an outlet pipe 33 is provided below the channel. Axial stripes are provided on the inner walls of the inlet pipe 32 and the outlet pipe 33. The inlet pipe 32 and the outlet pipe 33 can be fixedly connected to the base 29. Providing a stripe structure axially on the inlet pipe 32 and the outlet pipe 33 can reduce the contact area between the wire material and the inner walls of the inlet pipe 32 and the outlet pipe 33, which is beneficial to reducing the friction of the wire material moving axially and increasing the resistance to the wire material twisting around its own axis.

[0106] In a specific embodiment of the present invention, as Figure 2 shown, the wire feeding mechanism of the present invention further includes a rotating frame 25 that can rotate around the central axis of the channel. A through hole 251 for the wire material 10 to pass through is provided in the middle of the rotating frame 25; the extrusion rotor 22 and the driving rotor 21 are rotatably installed on the rotating frame 25. The rotation of the rotating frame 25 drives the extrusion rotor 22 and the driving rotor 21 provided thereon to rotate around the wire material 10 together.

[0107] Figure 2 In the embodiment shown, mounting holes are provided on the rotating frame 25 corresponding to the extrusion rotor 22 and the driving rotor 21. The bottoms of the extrusion rotor 22 and the driving rotor 21 are rotatably installed in the corresponding mounting holes. A through hole 251 for the wire material 10 to pass through is provided on the rotating frame 25. The through hole 251 is preferably a through hole. The mounting holes are arranged around the through hole. The extrusion rotor 22 and the driving rotor 21 are both arranged at an angle to the wire material. The rotating frame 25 can drive the extrusion rotor 22 and the driving rotor 21 to rotate around the wire material 10, and at the same time enable the extrusion rotor 22 and the driving rotor 21 to roll on the surface of the wire material, so as to drive the wire material 10 to feed and move along the channel.

[0108] Figure 5 In the embodiment shown, the rotating frame 25 is a rotating disk, which is rotatably installed on the base 29. The rotating disk is connected to the tops of the extrusion rotor 22 and the driving rotor 21. A through hole for the wire material 10 to pass through is provided in the middle of the rotating disk. The lower part of the through hole is connected to the upper part of the guiding pipe 31.

[0109] Figure 6 In the embodiment shown, the rotating frame 25 can be a rotating disk. The rotating disk is connected to the tops of the extrusion rotor 22 and the driving rotor 21. A through hole for the wire material 10 to pass through is provided in the middle of the rotating disk.

[0110] Figure 7 、 Figure 8 、 Figure 14 and Figure 15 In the embodiments shown, the bottoms of the extrusion rotor 22 and the driving rotor 21 are rotatably installed on the rotating frame through bearings 252.

[0111] Figure 19and Figure 21 In the embodiment shown, the rotating frame 25 includes an upper rotating part 255 and a lower rotating part 256. The tops of the extrusion rotor 22 and the driving rotor 21 are rotatably mounted on the upper rotating part 255, and the bottoms of the extrusion rotor 22 and the driving rotor 21 are rotatably mounted on the lower rotating part 256. The upper rotating part 255 and the lower rotating part 256 can be in the shape of rotating disks.

[0112] Figure 20 and Figure 22 In the embodiment shown, the rotating frame 25 includes an upper rotating part 255, a lower rotating part 256, and a plurality of connecting rods 257 that support and connect the upper rotating part 255 and the lower rotating part 256. The tops of the extrusion rotor 22 and the driving rotor 21 are rotatably mounted on the upper rotating part 255, and the bottoms of the extrusion rotor 22 and the driving rotor 21 are rotatably mounted on the lower rotating part 256.

[0113] Further, the wire feeding mechanism of the present invention further includes another rotatable rotating frame. Another extrusion rotor and another driving rotor are rotatably mounted on the other rotating frame, and the rotating direction of the other rotating frame is opposite to that of the rotating frame 25. That is, two sets of extrusion rotors and driving rotors are provided, and the rotating directions of the two sets of extrusion rotors and driving rotors around the wire 10 are opposite, which can cancel out the torsional effects generated by the extrusion rotors and driving rotors on the wire. And / or, the rotating frame includes a first rotating part and a second rotating part. One end of the driving rotor and the extrusion rotor is rotatably connected to the first rotating part, and the other end is rotatably connected to the second rotating part.

[0114] Still further, as Figure 6 、 Figures 19 to 25 shown, the wire feeding mechanism of the present invention further includes a driving component 26 that is drivingly connected to the rotating frame 25. The driving component 26 can drive the rotating frame 25 to perform a rotational movement around the central axis of the channel.

[0115] In a preferred embodiment, as Figure 6As shown, the driving assembly 26 includes a rotating member 261 connected to the rotating frame 25 and a motor 262 drivingly connected to the rotating member 261. Specifically, a synchronous pulley is connected to the output shaft of the motor 262, a synchronous belt 263 is sleeved on the synchronous pulley, and the synchronous belt 263 is also sleeved on the rotating member 261. The motor 262 is drivingly connected to the rotating member 261 through the synchronous pulley and the synchronous belt 263. The motor 262 drives the synchronous pulley to rotate, and then drives the rotating member 261 to rotate through the synchronous belt 263. The rotating member 261 drives the rotating frame 25 to rotate, and the rotating frame 25 further drives the extrusion rotor 22 and the driving rotor 22 connected thereto to rotate around the central axis of the wire material. A through channel 2611 for the wire material 10 to pass through is provided in the middle of the rotating member 261. The rotating member 261 is preferably a synchronous pulley. The rotating frame 25 is rotatably arranged on a base 29. The base 29 can be fixedly connected to the motor 262, or the base 29 and the motor 262 can be fixedly arranged on a bearing table or a support with a certain distance. In another preferred embodiment, the motor can be drivingly connected to the rotating member through a gear, and then drive the rotating member to rotate. The rotating member is preferably a gear. Specifically, a first gear and a second gear are provided to be meshed with each other. The first gear is coaxially and fixedly connected to the rotating frame, and the second gear is coaxially and fixedly connected to the output shaft of the motor. The first gear has a through channel for the wire material to pass through. In still another preferred embodiment, the driving assembly is a motor, the rotor of the motor is coaxially and fixedly connected to the rotating frame 25, the motor can drive the rotating frame to rotate, and a coaxially penetrating through hole is provided on the rotor of the motor to allow the wire material to pass through. Such a structure is more concise and does not require components such as a synchronous belt and a synchronous pulley.

[0116] Figures 19 to 22 In the illustrated embodiment, the rotating member 261 is a central wheel, and two annular teeth can be provided thereon. The central wheel can also be a synchronous pulley. The two annular teeth can accommodate two synchronous belts to be meshed simultaneously, or the two annular teeth can be replaced by an elongated annular tooth. The central wheel can be two synchronous pulleys coaxially and fixedly connected, or can be an elongated synchronous pulley. The central wheel is coaxially and fixedly connected to the rotating frame to directly drive the rotating frame to rotate. A coaxial through channel 2611 is provided on the central wheel to allow the wire material to pass through. Figure 19 and Figure 21In the illustrated embodiment, the upper rotating part 255 and the lower rotating part 256 of the rotating frame are connected to each other through the rotating member 261, and the interior of the rotating member 261 is hollow to form a through channel 2611, and the extrusion rotor 22 and the driving rotor 21 can be placed in the through channel 2611 of the rotating member 261, and the upper rotating part 255 and the lower rotating part 256 are embedded in the bottom of the top of the rotating member 261. A mounting frame 27 is also provided, and the center wheel is rotatably provided on the mounting frame 27. Guide wheels 271 are provided on the mounting frame 27 corresponding to both sides of the rotating member 261, which are used to assist the rotating member 261 in connecting with a synchronous belt or a conveyor belt. Figure 19 In the illustrated embodiment, the extrusion rotor 22 and the drive rotor 21 are arranged at an angle to the filament. Figure 21 In the illustrated embodiment, the extrusion rotor 22 and the driving rotor 21 are arranged parallel to the filament.

[0117] Figure 19 , Figure 21 and Figure 23 The mounting frame 27 and Figure 5 and Figure 6 The base 29 in the embodiment may have the same function, Figure 24 and Figure 25 Mobile seat 2645 and Figure 5 and Figure 6 The base 29 in may have the same function.

[0118] Figure 20 and Figure 22 In the illustrated embodiment, the rotating member 261 is disposed at the top of the upper rotating portion 255 . The rotating member 261 is coaxially fixedly connected to the rotating frame. The rotating member 261 has a through channel 2611 for the wire to pass through. Figure 20 In the illustrated embodiment, the extrusion rotor 22 and the drive rotor 21 are arranged at an angle to the filament. Figure 22 In the illustrated embodiment, the extrusion rotor 22 and the driving rotor 21 are arranged parallel to the filament.

[0119] Furthermore, if Figure 23 As shown, the driving assembly 26 includes a rotating member 261 connected to the rotating frame and a wire angle coupling assembly 264 drivingly connected to the rotating member 261. The wire angle coupling assembly 264 can drive the rotating member 261 to rotate, and can also drive the rotating member 261 to move along the first direction and / or along the second direction, so that the rotating member 261 can rotate and move with the rotating frame 25. The rotating member 261 has a through channel 2611 for the wire to pass through.

[0120] Figure 23 and Figure 24In the illustrated embodiment, a rotation frame is driven to rotate by a linear-angle coupling transmission mechanism. The linear-angle coupling transmission mechanism includes a central wheel and a linear-angle coupling assembly 264. In the figure, the rotating member 261 is the central wheel, and the central wheel is a synchronous pulley that can be fixedly connected coaxially with the rotation frame. The central wheel is rotatably arranged on the moving seat 2645. The linear-angle coupling assembly 264 further includes two transmission belts 2643 that mesh with the central wheel on opposite sides of the central wheel. The two transmission belts 2643 are arranged offset in the axial direction of the rotating member 261. The transmission belts 2643 can be annular (closed) synchronous belts. Each of the two transmission belts 2643 is respectively tensioned by a driving wheel 2641 and an idler wheel 2643. The driving wheel 2641 and the idler wheel 2643 can both be toothed synchronous pulleys. Preferably, the moving directions of the two transmission belts 2643 are parallel to each other. The rotation of the central wheel can be driven by the speed difference between the moving speeds of the two transmission belts 2643, and the two transmission belts can also drive the central wheel to move in a direction parallel to the moving direction of the transmission belts. Or as Figure 24 shown in, the moving seat 2645 can move along the guide rail 2644, and the moving direction of the transmission belt 2643 is substantially parallel to the guide rail 2644. Figure 24 shown in, end seats 2646 can be respectively arranged at both ends of the guide rail 2644. The guide rail 2644 is fixedly connected to the end seats 2646. The driving wheel 2641 and the idler wheel 2643 are respectively rotatably connected to the end seats 2646. A guide wheel 271 can also be provided. The guide wheel 271 is rotatably arranged on the moving seat 2645. Guide wheels 271 corresponding to each transmission belt 2643 are respectively arranged on the left and right sides of the central wheel. The left and right guide wheels 271 corresponding to the corresponding transmission belts are respectively in contact with the back of the corresponding transmission belt and press the transmission belt against the central wheel, increasing the meshing length between the transmission belt and the central wheel, increasing the driving force and stability. The guide wheel 271 can be a smooth rotating wheel. Thus, a motor is arranged at the driving wheel 2641 to drive the driving wheel 2641 to rotate, and then the rotating member 261 and the rotation frame are driven to rotate around the central axis of the channel through the transmission belt 2643, and then the driving rotor 21 and the extrusion rotor 22 are driven to roll on the wire material.

[0121] Figure 23 In the illustrated embodiment, the rotation frame includes an upper rotating part 255, and the rotating member 261 is connected to the upper rotating part 255 and drives the upper rotating part 255 to rotate together. Figure 24 In the illustrated embodiment, the extrusion rotor 21 and the driving rotor 22 are rotatably installed on the rotation frame 25. The rotation frame 25 includes an upper rotating part 255, a lower rotating part 256, and a connecting rod 257. The connecting rod 257 is supported and connected between the upper rotating part 255 and the lower rotating part 256 to fixedly connect the two. The top and bottom of the extrusion rotor 21 and the driving rotor 22 are respectively rotatably connected to the corresponding upper rotating part 255 and lower rotating part 256 through bearings. The rotating member 261 is connected to the top of the upper rotating part 255.

[0122] Figure 25 Shown in Figure 24 On the basis of the shown solution, two more linear-angle coupling transmission mechanisms are added to form a new linear-angle coupling transmission mechanism to drive the rotary frame to rotate, and at the same time, the rotary frame can also move along the XY plane. The linear-angle coupling drive mechanism includes a rotating member, a transverse linear-angle coupling mechanism 264a, and two longitudinal linear-angle coupling mechanisms 264b. The transverse linear-angle coupling mechanism 264a is the same as Figure 24 the shown linear-angle coupling transmission mechanism. The two longitudinal linear-angle coupling mechanisms 264b respectively include a central wheel 261b driven by two respective transmission belts. The central wheels 261b of the two longitudinal linear-angle coupling mechanisms 264b are respectively coaxially and fixedly connected to the corresponding driving wheels 2641 of the transverse linear-angle coupling mechanism 264a. Four motors 2712648 are respectively coaxially drivingly connected to the corresponding driving wheels of the two longitudinal linear-angle coupling mechanisms 264b.

[0123] The present invention also provides a wire feeding method,

[0124] providing a rotatable driving rotor, at least one extrusion rotor, and a channel. The outer periphery of the provided driving rotor is provided with a convex structure. The outer periphery of the provided extrusion rotor is smooth. The provided channel is used for the movement of the wire and is at least partially located between the driving rotor and the extrusion rotor;

[0125] The wire feeding method includes the following steps:

[0126] Introduce the wire into the channel between the provided extrusion rotor and the driving rotor, and make the extrusion rotor contact the wire to limit the wire;

[0127] Make the extrusion rotor and the driving rotor rotate around the wire together, so that the extrusion rotor and the driving rotor can roll on the surface of the wire, and drive the wire to feed and move along the channel by at least partially embedding the convex structure on the driving rotor into the wire.

[0128] Further, a rotary frame can be provided. The rotary frame is provided with a through hole for the wire to pass through. The extrusion rotor and the driving rotor are rotatably installed on the rotary frame, and then drive the rotary frame to rotate to drive the extrusion rotor and the driving rotor to rotate around the wire together.

[0129] The wire materials applicable to the present invention can be thermoplastic resin materials, such as PLA (polylactic acid), PP (polypropylene), PE (polyethylene), ABS (acrylonitrile butadiene styrene), PA (polyamide) (nylon), PC (polycarbonate), PS (polystyrene), PEI (poly(etherimide)), PET (poly(ethylene terephthalate)), PEEK (polyetheretherketone), TPU (thermoplastic polyurethanes), etc.; or elastic materials, such as thermoplastic elastomer (TPE), styrene-butadiene rubber (SBR), and styrene-butadiene-styrene block copolymer (SBS), etc., or thermoplastic polyurethane (TPU) or thermoplastic vulcanizate (TPV); of course, it can also be thermosetting resin materials or photosensitive polymerizable resin materials, or other materials that can be extruded by flowing. The wire material can also be a continuous fiber printing material (or called continuous fiber wire material), which can be fiber materials, metal wire materials (such as copper wire), optical fiber materials, or other continuous linear materials, and can be continuous fiber materials impregnated with resin. Examples of continuous fiber materials include carbon fiber, glass fiber, polyester, aramid, ceramic fiber, boron fiber, or basalt fiber, etc.

[0130] In the text, "substantially" means theoretically precise, but there are errors in actual manufacturing or installation, such as an error less than ±45 degrees, or an error less than ±30 degrees, or an error less than ±15 degrees, or an error of ±50%. The use of directional terms such as "upper", "lower", "left", and "right" in the description is for the convenience of description based on the specific drawings and does not limit the present invention. In actual applications, due to the transformation of the overall structure in space, the actual left or right position may be different from that in the drawings. However, all these transformations should be within the protection scope of the present invention.

[0131] The present invention has been described in detail above in conjunction with the embodiments with reference to the drawings. Those of ordinary skill in the art can make various variations to the present invention according to the above description. Therefore, some details in the embodiments should not constitute a limitation to the present invention, and the protection scope of the present invention will be defined by the scope defined in the appended claims.

Claims

1. A silk feeding mechanism, characterized in that, Comprising: A rotatable drive rotor, on the outer periphery of which a convex structure is provided; At least one rotatable extrusion rotor, the outer peripheral surface of which is smooth; A channel, at least partially located between the drive rotor and the extrusion rotor, for the wire material to move therein; The drive rotor and the extrusion rotor are arranged around the central axis of the channel. The drive rotor and the extrusion rotor respectively have a preset distance from the central axis of the channel. The drive rotor and the extrusion rotor can rotate around the central axis of the channel. The surface of the extrusion rotor contacts the surface of the wire material to limit the wire material. The convex structure of the drive rotor can partially embed into the wire material to drive the wire material to feed and move along the channel.

2. The wire material feeding mechanism according to claim 1, characterized in that, The drive rotor and at least one extrusion rotor are evenly arranged around the central axis of the channel; or, two extrusion rotors are arranged on both sides of the plane formed by the central axis of the channel and the perpendicular line perpendicular to the axis of the drive rotor or the axis of the drive rotor; or, three extrusion rotors are arranged in sequence around the central axis of the channel with the drive rotor. One of the extrusion rotors and the drive rotor are located on opposite sides of the central axis of the channel, and the other two extrusion rotors are arranged on both sides of the plane formed by the central axis of the channel and the perpendicular line perpendicular to the axis of the drive rotor or the axis of the drive rotor.

3. The wire feeding mechanism according to claim 1, characterized in that, The convex structure provided on the drive rotor is spiral, and the axis of the drive rotor is arranged parallel to the central axis of the channel; Or, the convex structure provided on the drive rotor is annular, and the number of the annular convex structures is one or more than one. When the number of the annular convex structures is more than one, the annular convex structures are arranged at intervals along the axis direction of the drive rotor on the outer periphery of the drive rotor, and the axis of the drive rotor is arranged at an angle with the central axis of the channel; And, the axis of the extrusion rotor is arranged parallel to the central axis of the channel, or arranged at an angle with the central axis of the channel, and the angle is such that the component velocity direction of the outer peripheral movement of the extrusion rotor along the direction parallel to the central axis of the channel is the same as the feeding direction of the wire material.

4. The wire material feeding mechanism according to claim 1, characterized in that, The axis of the extrusion rotor is arranged at an angle with the central axis of the channel. This angle causes the extrusion rotor to generate a component velocity along the axis direction of the wire material while rotating around its own axis. The generated component velocity is substantially equal to the velocity of the drive rotor driving the wire material to feed, with an error of ±50%.

5. The wire material feeding mechanism according to claim 1, characterized in that, It further includes an elastic component connected to the drive rotor or the extrusion rotor, for driving the drive rotor or the extrusion rotor to approach the central axis of the channel.

6. The wire feeding mechanism according to claim 5, characterized in that, The elastic component includes an elastic pushing member connected to the drive rotor or the extrusion rotor, and the elastic pushing member pushes the drive rotor or the extrusion rotor towards the wire material; Alternatively, either the extrusion rotor or the driving rotor can be rotatably mounted on a moving frame, which can move in a direction substantially perpendicular to the wire material. The elastic component acts on the moving frame to push the moving frame towards the wire material, thereby pushing the extrusion rotor or the driving rotor towards the wire material; Alternatively, the elastic component includes a swingable lever and a spring connected to the lever. The driving rotor or the extrusion rotor is rotatably mounted on the lever, and the spring pushes or pulls the lever towards the wire material, and then the lever drives the driving rotor or the extrusion rotor to approach the wire material; Alternatively, the elastic component includes a swingable lever, a spring connected to the lever, and a balance frame swingably arranged on the lever. The number of extrusion rotors is at least two, which are respectively rotatably arranged on the balance frame. The spring pushes or pulls the lever towards the wire material, and then the lever drives the balance frame and the extrusion rotors thereon to approach the wire material; 7. The wire feeding mechanism according to claim 1, characterized in that, The outer contour of the extrusion rotor is cylindrical; Alternatively, when the axis of the extrusion rotor is parallel to the central axis of the channel, the outer contour of the extrusion rotor is a club shape with thinner ends and thicker middle; or the outer contour of the extrusion rotor is a frustum of a cone shape with a smaller diameter on the side close to the wire inlet and a larger diameter at the other end; or the outer contour of the extrusion rotor is a shape with a smaller diameter at a section close to the wire inlet and gradually changing to a cylindrical shape in the direction away from the inlet; Alternatively, when the axis of the extrusion rotor is arranged at an angle to the central axis of the channel, the outer contour of the extrusion rotor is a columnar shape with a variable cross-section having larger diameters at both ends and a smaller diameter in the middle; 8. The wire material feeding mechanism according to claim 1, wherein, There is one extrusion rotor, and the wire feeding mechanism further includes a side clearance guiding block arranged between the extrusion rotor and the driving rotor. The side clearance guiding block, the extrusion rotor and the driving rotor enclose to form the channel; And / or, the wire feeding mechanism further includes a guiding tube, which rotates around the central axis of the channel together with the driving rotor and the extrusion rotor. An opening is provided at the position of the guiding tube facing the driving rotor and the extrusion rotor for avoiding the driving rotor and the extrusion rotor, and the wire material moves in the guiding tube; and / or, a torsion-proof extrusion wheel is arranged at the inlet or the outlet; and / or, the feeding tube for conveying the wire material is bent; and / or, axial stripes are arranged on the inner wall of the inlet pipeline or the outlet pipeline.

9. The wire feeding mechanism according to claim 1, characterized in that, The convex structure arranged on the driving rotor is spiral, and the axis of the driving rotor is parallel to the central axis of the channel; The number of extrusion rotors is at least two, and the at least two extrusion rotors are arranged along the direction parallel to the axis of the channel.

10. The wire material feeding mechanism according to claim 1, characterized in that, It further includes a rotating frame that can rotate around the central axis of the channel. A through hole for the wire material to pass through is provided in the middle of the rotating frame; The extrusion rotor and the driving rotor are respectively rotatably mounted on the rotating frame.

11. The wire feeding mechanism according to claim 10, characterized in that, It further includes another rotating frame that can rotate around the central axis of the channel. A another through-hole for the wire material to pass through is provided in the middle of the another rotating frame. It further includes another driving rotor and at least one another extrusion rotor that are respectively rotatably mounted on the another rotating frame, and the rotation direction of the another rotating frame is opposite to the rotation direction of the rotating frame; And / or, the rotating frame includes a first rotating part and a second rotating part. One ends of the driving rotor and the extrusion rotor are rotatably connected to the first rotating part, and the other ends are rotatably connected to the second rotating part.

12. The wire material feeding mechanism according to claim 10, characterized in that, It further includes a driving assembly that is drivingly connected to the rotating frame. The driving assembly can drive the rotating frame to rotate around the central axis of the channel; wherein: The driving assembly is a linear-angle coupling transmission mechanism. The linear-angle coupling transmission mechanism is drivingly connected to the rotating frame through a rotating member; Or, the driving assembly is a linear-angle coupling transmission mechanism. The linear-angle coupling transmission mechanism is coaxially fixed to the rotating frame through a rotating member, and the rotating member has a through-channel for the wire material or the feeding pipe to pass through, and the driving rotor and the extrusion rotor are located in the through-channel; Or, the driving assembly is a linear-angle coupling transmission mechanism. The linear-angle coupling transmission mechanism is coaxially fixed to the rotating frame through a rotating member, and the rotating member has a through-channel for the wire material or the feeding pipe to pass through, and the driving rotor and the extrusion rotor are located below the rotating member; Or, the driving assembly is a motor. The rotor of the motor is coaxially fixed to the rotating frame, and the rotating shaft of the rotor of the motor has a through-hole for the wire material or the feeding pipe to pass through; Or, the driving assembly is a synchronous pulley. The synchronous pulley is coaxially fixed to the rotating frame, and the synchronous pulley has a through-channel for the wire material or the feeding pipe to pass through. It further includes a synchronous belt that meshes with the synchronous pulley. The other end of the synchronous belt meshes with another synchronous pulley, and the another synchronous pulley is coaxially fixed to the output shaft of the motor; Or the driving assembly is a first gear and a second gear that mesh with each other. The first gear is coaxially fixed to the rotating frame, the second gear is coaxially fixed to the output shaft of the motor, and the first gear has a through-channel for the wire material or the feeding pipe to pass through.

13. The wire feeding mechanism according to claim 1, characterized in that, The convex structure provided on the driving rotor is spiral, and the axis of the driving rotor is arranged parallel to the central axis of the channel; the outer contour of the driving rotor is that the diameter of the spiral convex structure near the wire material inlet end is small and gradually transitions to a spiral convex structure with an equal diameter in the direction away from the inlet; Or, the convex structure provided on the driving rotor is spiral. The axis of the driving rotor is coplanar with the central axis of the channel, and the distance between the axis of the driving rotor and the central axis of the channel at the entrance of the channel is greater than the distance between the axis of the driving rotor and the central axis of the channel at the exit.

14. A wire material feeding method, characterized in that Provide a rotatable drive rotor, at least one extrusion rotor and a channel. The outer periphery of the provided drive rotor is provided with a convex structure. The outer periphery of the provided extrusion rotor is smooth. The provided channel is for the movement of the wire material and is at least partially located between the drive rotor and the extrusion rotor; The wire feeding method includes the following steps: Introduce the wire material into the channel between the provided extrusion rotor and the drive rotor, and make the extrusion rotor contact with the wire material to limit the wire material; Make the extrusion rotor and the drive rotor rotate together around the wire material, so that the extrusion rotor and the drive rotor can roll on the surface of the wire material, and at least part of the convex structure on the drive rotor is embedded into the wire material to drive the wire material to feed and move along the channel.

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