A wire feeding device for filamentary 3D printing materials

Abstract

The present invention provides a wire feeding device for filamentous 3D printing materials, belonging to the field of 3D printing technology, including a printing mechanism, the printing mechanism including a Y-axis movable guide frame, a Z-axis movable guide frame and an X-axis movable guide frame, the upper end of the X-axis movable guide frame is provided with a bottom plate, the Z-axis movable guide frame is connected to a wire release frame and a control panel, the wire release frame is rotatably connected to a wire release drum, and also includes: a wire feeding assembly, a spraying assembly and a clamping assembly; the wire feeding assembly can ensure smooth feeding of the wire on the wire release drum; the clamping assembly can not only be adjusted according to the thickness of the wire, but also can be adaptively adjusted according to the situation during wire processing. The invention has the following beneficial effects: it can reduce the influence of debris and dust on the wire on the transmission effect, and reduce the phenomenon of slipping, jamming and even inability to rotate, and can realize real-time monitoring of the wear of the extrusion wheel, which helps to improve production efficiency, reduce failure rate and ensure product quality.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing, and in particular to a wire feeding device for filamentary 3D printing materials. Background Art

[0002] 3D printing is a manufacturing technology that creates objects by stacking them layer by layer, also known as additive manufacturing. Compared with traditional subtractive manufacturing methods, 3D printing builds objects by stacking materials layer by layer, making the design and manufacturing process more free and flexible. It has been widely used in many fields, including industrial manufacturing, healthcare, aerospace, education, and art. With the development of technology and the reduction of costs, 3D printing is constantly evolving and innovating, bringing more possibilities for creation and manufacturing. When printing objects, current 3D printers need a wire feeding device to feed the printing wire. The wire feeding device in the related technology is usually composed of a wire winding disk, an extrusion wheel, a wire pressing wheel, and a motor. The printing wire is fed by passing one end of the printing wire wound on the wire winding disk between the extrusion wheel and the wire pressing wheel, and then driving the extrusion wheel to rotate by the motor.

[0003] After long-term use of the extrusion wheel, the relative sliding friction between the extrusion wheel and the consumables will cause wear, affecting its effective engagement with the consumables, resulting in slippage and affecting the wire feeding efficiency. In order to reduce the occurrence of this situation, some detection methods are used to detect the extrusion wheel. Usually, a high-resolution camera is used to capture the surface condition of the extrusion wheel or the weight change of the extrusion wheel is measured to evaluate the wear. However, although this static detection method is convenient and does not require complex equipment, they may need to stop the machine to perform, so it is impossible to monitor the working extrusion wheel in real time, thereby unable to ensure the smooth progress of the printing work; in addition, residual consumable debris and dust may adhere to the surface of the extrusion wheel, which may cause the extrusion gear to become stuck or even unable to rotate during operation; how to invent a method to improve these problems has become an urgent problem to be solved by technicians in this field. Summary of the invention

[0004] In order to make up for the above shortcomings, the present invention provides a wire feeding device for filamentary 3D printing materials, which aims to improve the problem that the machine needs to be stopped for detection, the extrusion wheel cannot be monitored in real time, and during the extrusion process, the extrusion gear becomes stuck or even unable to rotate due to debris and dust on the consumables, thereby affecting the printing effect.

[0005] The present invention is achieved in that:

[0006] The present invention provides a wire feeding device for filamentous 3D printing materials, comprising a printing mechanism, wherein the printing mechanism comprises a Y-direction movable guide frame, a Z-direction movable guide frame, an X-direction movable guide frame and a bottom plate, wherein the Z-direction movable guide frame is connected to a wire placing frame and a control panel, wherein the wire placing frame is rotatably connected to a wire placing drum, and further comprises: a wire feeding assembly, a spraying assembly and a pressing assembly;

[0007] The spraying assembly is located below the wire feeding assembly;

[0008] The clamping assembly is fixedly connected to the wire feeding assembly.

[0009] Preferably, the base plate is slidably connected to the Y-direction movable guide frame, the Y-direction movable guide frame is fixedly connected to the Z-direction movable guide frame, the Z-direction movable guide frame is fixedly connected to the X-direction movable guide frame, the upper end of the Z-direction movable guide frame is fixedly connected to the wire release frame, and the rear side wall of the Z-direction movable guide frame is fixedly connected to the control panel.

[0010] Preferably, the wire feeding assembly includes a wire feeding motor, a movable mounting plate and a support frame plate, the support frame plate is fixedly connected to the wire feeding motor and the movable mounting plate by bolts respectively, the movable mounting plate is connected to the X-axis movable guide frame, and the output end of the wire feeding motor is provided with a driving gear.

[0011] Preferably, bearing seats are provided on both sides of the front end of the support frame plate, the inner ring side walls of the bearing seats are fixedly connected to the extrusion wheel, one end of the extrusion wheel is fixedly connected to the wire feeding gear, the wire feeding gear is meshingly connected to the driving gear, the other end of the extrusion wheel is provided with a fixing part, and the middle outer wall of the extrusion wheel is provided with a plurality of grooves distributed in a circumferential array.

[0012] By adopting the above technical solution, the friction effect between the extrusion wheel and the wire material can be increased and the slipping phenomenon can be reduced.

[0013] Preferably, the support frame plate is provided with a placement groove on one side of the extrusion wheel, and the support frame plate is provided with a material discharge hole below the extrusion wheel. The placement groove is rotatably connected to a rotating column, and the outer wall of the rotating column is fixedly connected to a plurality of connecting plates engaged with the grooves, and the end of the connecting plate away from the rotating column is arc-shaped and provided with a cleaning groove, and the support frame plate is respectively provided with an infrared transmitter and an infrared receiver on both sides of the opening of one end of the placement groove.

[0014] By adopting the above technical solution, the connecting plate and the groove can be meshed so that the extrusion wheel can drive the rotating column to rotate when it rotates. At the same time, the impurities inside the groove can be squeezed out through the cleaning groove, so as to achieve the digging and cleaning of the impurities, thereby ensuring the friction effect between the extrusion wheel and the wire material, and sending a signal through the infrared transmitter and received by the infrared receiver to detect whether there is an obstacle between the two.

[0015] Preferably, a movable plate is provided on the inner wall of the placement groove, a collection frame is detachably connected to one side of the movable plate, a baffle is fixedly connected to one side of the collection frame, a sponge pad is fixedly connected to the upper end of the baffle close to the collection frame, and the height of the baffle is higher than the height of one end of the collection frame.

[0016] Preferably, a step limit groove is opened on one side of the placement groove, and a telescopic spring is arranged inside the step limit groove. The two ends of the telescopic spring are respectively fixedly connected to the inner wall of the step limit groove and one end side wall of the movable plate, and one end of the movable plate is limitedly and slidably connected to the inner wall of the step limit groove.

[0017] By adopting the above technical solution, during the rotation of the rotating column, the corresponding connecting plate will squeeze the baffle plate and drive the movable plate to slide on the inner wall of the step limit groove, so that the telescopic spring is compressed. At this time, the impurities attached to the connecting plate can be scraped and cleaned by the sponge pad to ensure the cleaning effect next time. When the corresponding connecting plate is separated from the baffle plate due to rotation, the baffle plate will rebound through the elasticity of the telescopic spring before the next connecting plate arrives, and then perform the above movement with the next connecting plate. When the surface of the extrusion wheel is worn to a certain extent, the connecting plate is no longer transmitted to the groove. At this time, the baffle plate is no longer squeezed, and the telescopic spring begins to recover elastically and drive the movable plate to move inside the step limit groove, finally making one end of the collection frame move out of the placement groove. At this moment, the two sides of the collection frame will block the signals of the infrared transmitter and the infrared receiver, thereby realizing shutdown and replacement through signal transmission.

[0018] Preferably, the spray assembly includes frame one, a nozzle, a heating nozzle and frame two, frame one is fixedly connected to the movable mounting plate by bolts, frame one is located above frame two, frame two is fixedly connected to the support frame plate, the nozzle and the heating nozzle are fixedly connected, and one end of the heating nozzle is fixedly connected to the support frame plate.

[0019] By adopting the above technical solution, the heating nozzle can melt the filament and print through the nozzle, and the frame one and the frame two can be detachably installed with cooling fans to respectively dissipate heat for the nozzle and the heating nozzle.

[0020] Preferably, the clamping assembly respectively includes a connecting rod, a transfer rod, an adapting cylinder, an adjusting rod and a pressure plate, one end of the pressure plate is rotatably connected to the support frame plate, a limiting hole is provided on one side of the pressure plate, a wire pressing wheel is rotatably connected to the side wall of the pressure plate, the other end of the pressure plate is fixedly connected to the connecting rod, the other end of the connecting rod is rotatably connected to the transfer rod, a limiting groove is provided on the transfer rod, the limiting groove slides with one end of the adapting cylinder in a limited manner, and a pair of rollers are provided inside the adapting cylinder.

[0021] Preferably, one end of the adjusting rod is detachably connected to the adapter rod, a gasket, a buffer spring and an adjusting nut are sleeved on the outer wall of the adjusting rod, the adjusting nut is threadedly connected to the adjusting rod, both ends of the buffer spring are respectively contacted and connected with the gasket and the adjusting nut, the adjusting rod is connected to a fixing plate, and the fixing plate is fixedly connected to the outer wall of the wire feeding motor.

[0022] By adopting the above technical solution, the adjusting rod can be connected to the transfer rod, and then the adjusting nut can be rotated according to the thickness of the wire to drive the wire pressing wheel to approach or move away from the extrusion wheel, so as to better feed the wire. In the feeding process, when the diameter of the wire is uneven, the buffer spring can drive the wire pressing wheel to perform adaptive adjustment to avoid affecting the printing effect. In addition, during the printing process, due to the movement of the wire feeding assembly, the wire can drive the adaptation cylinder to slide inside the limiting slide groove during the transportation process, and the role of the roller can effectively avoid the wire from getting stuck during use and increase the smoothness of wire feeding.

[0023] The beneficial effects of the present invention are:

[0024] When the wire is fed during the operation of the 3D printing device, the connecting plate can engage with the groove so that the cleaning groove squeezes the impurities inside the groove and digs out the impurities during separation, thereby cleaning the groove and reducing the influence of debris and dust on the wire on the transmission effect, thereby ensuring the friction effect between the extrusion wheel and the wire, and reducing the phenomenon of slipping, jamming or even unable to rotate;

[0025] During the rotation of the rotating column, the corresponding connecting plate will squeeze the baffle and throw the impurities dug out of the cleaning groove into the collection frame. After that, the sponge pad will scrape and clean the impurities attached to the connecting plate to ensure the cleaning effect next time. When the surface of the extrusion wheel is worn to a certain extent, the connecting plate is separated from the groove, which will cause the side walls of the collection frame to block the signals of the infrared transmitter and the infrared receiver. Then the control panel controls the wire feeding motor to stop rotating and replace the extrusion wheel, so as to realize real-time monitoring of the wear of the extrusion wheel. The structure is simple, the detection cost is reduced, it is helpful to improve production efficiency, reduce the failure rate, and realize centralized cleaning of impurities while ensuring product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1It is a schematic diagram of the overall front side structure of a wire feeding device for filamentous 3D printing materials provided by an embodiment of the present invention;

[0028] Figure 2 It is a schematic diagram of the overall rear side structure of a wire feeding device for filamentary 3D printing materials provided by an embodiment of the present invention;

[0029] Figure 3 It is a schematic diagram of the left rear structure of a wire feeding assembly of a wire feeding device for filamentous 3D printing materials provided by an embodiment of the present invention;

[0030] Figure 4 It is a schematic diagram of the lower right side structure of a wire feeding assembly of a wire feeding device for filamentous 3D printing materials provided by an embodiment of the present invention;

[0031] Figure 5 It is a schematic diagram of the structure of an adjustment component of a wire feeding device for filamentary 3D printing materials provided by an embodiment of the present invention;

[0032] Figure 6 It is a schematic diagram of the front side structure of a support frame plate of a wire feeding device for filamentous 3D printing materials provided by an embodiment of the present invention;

[0033] Figure 7 It is a schematic diagram of a half-section structure of a wire feeding assembly of a wire feeding device for filamentous 3D printing materials provided by an embodiment of the present invention;

[0034] Figure 8 A wire feeding device for filamentous 3D printing materials provided by an embodiment of the present invention Figure 7 A schematic diagram of the enlarged structure in the middle.

[0035] In the figure: 1. Printing mechanism; 11. Y-axis movable guide frame; 12. Z-axis movable guide frame; 13. Wire feeding drum; 14. Wire feeding frame; 15. Control panel; 16. X-axis movable guide frame; 17. Bottom plate; 2. Wire feeding assembly; 21. Wire feeding motor; 22. Mobile mounting plate; 23. Extrusion wheel; 24. Driving gear; 25. Wire feeding gear; 26. Support frame plate; 27. Bearing seat; 28. Fixing piece; 29. ​​Infrared transmitter; 210. Collection frame; 211. Infrared receiver; 212. Feeding hole; 213. Connecting plate; 214. Rotating column; 215. Placement slot; 216, movable plate; 217, sponge pad; 218, baffle; 219, stepped limit slot; 220, telescopic spring; 221, groove; 222, cleaning slot; 3, spray assembly; 31, frame one; 32, nozzle; 33, heating nozzle; 34, frame two; 4, clamping assembly; 41, connecting rod; 42, transfer rod; 421, limit slide; 43, adaptation cylinder; 431, roller; 44, adjusting rod; 441, gasket; 442, buffer spring; 443, adjusting nut; 45, fixing plate; 46, pressure plate; 47, thread pressing wheel; 48, limit hole. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Example, see Figure 1-Figure 8 A wire feeding device for filamentary 3D printing materials, comprising a printing mechanism 1, the printing mechanism 1 comprising a Y-direction movable guide frame 11, a Z-direction movable guide frame 12, an X-direction movable guide frame 16 and a bottom plate 17, the Z-direction movable guide frame 12 is connected to a wire placing frame 14 and a control panel 15, the wire placing frame 14 is rotatably connected to a wire placing drum 13, and further comprising: a wire feeding assembly 2, a spraying assembly 3 and a pressing assembly 4;

[0038] The spraying assembly 3 is located below the wire feeding assembly 2;

[0039] The clamping assembly 4 is fixedly connected to the wire feeding assembly 2 .

[0040] Furthermore; the bottom plate 17 is slidably connected to the Y-direction movable guide frame 11, the Y-direction movable guide frame 11 is fixedly connected to the Z-direction movable guide frame 12, the Z-direction movable guide frame 12 is fixedly connected to the X-direction movable guide frame 16, the upper end of the Z-direction movable guide frame 12 is fixedly connected to the wire release frame 14, and the rear side wall of the Z-direction movable guide frame 12 is fixedly connected to the control panel 15; the spraying assembly 3 includes a frame 1 31, a nozzle 32, a heating nozzle 33 and a frame 2 34, the frame 1 31 is fixedly connected to the movable mounting plate 22 by bolts, the frame 1 31 is located above the frame 2 34, the frame 2 34 is fixedly connected to the support frame plate 26, the nozzle 32 and the heating nozzle 33 are fixedly connected, and one end of the heating nozzle 33 is fixedly connected to the support frame plate 26.

[0041] It should be noted that: the wire feeding assembly 2 can be controlled to move on the X-axis movable guide frame 16 and the Z-axis movable guide frame 12 through the control panel 15, and cooperate with the movement of the base plate 17 on the Y-axis movable guide frame 11 to achieve 3D printing, and the control panel 15 is respectively connected to the X-axis movable guide frame 16, the Y-axis movable guide frame 11, the Z-axis movable guide frame 12, the wire feeding motor 21, the infrared transmitter 29, the infrared receiver 211, and the electrical signals between the heating nozzle 33 and the nozzle 32. In addition, when printing, the wire can be melted by the heating nozzle 33 and printed through the nozzle 32, and the frame 1 31 and the frame 2 34 are detachably installed with cooling fans to respectively dissipate heat for the nozzle 32 and the heating nozzle 33 to avoid damage to the components due to excessive temperature.

[0042] Reference Figure 3-Figure 8, further; the wire feeding assembly 2 includes a wire feeding motor 21, a movable mounting plate 22 and a support frame plate 26, the support frame plate 26 is fixedly connected to the wire feeding motor 21 and the movable mounting plate 22 by bolts respectively, the movable mounting plate 22 is connected to the X-axis movable guide frame 16, and a driving gear 24 is provided at the output end of the wire feeding motor 21; bearing seats 27 are provided on both sides of the front end of the support frame plate 26, and the inner ring side wall of the bearing seat 27 is fixedly connected to the extrusion wheel 23, one end of the extrusion wheel 23 is fixedly connected to the wire feeding gear 25, the wire feeding gear 25 is meshed with the driving gear 24, and a fixing piece 28 is provided at the other end of the extrusion wheel 23, and a plurality of grooves 221 distributed in a circumferential array are provided on the middle outer wall of the extrusion wheel 23; a placement groove 215 is provided on one side of the extrusion wheel 23, and a feed hole 212 is provided on the support frame plate 26 below the extrusion wheel 23, and the placement groove 215 is rotatably connected to a rotating column 214, and the outer wall of the rotating column 214 is fixedly connected to a plurality of grooves 221 distributed in a circumferential array. The connecting plate 213 is meshed with the groove 221, and the end of the connecting plate 213 away from the rotating column 214 is arc-shaped and has a cleaning groove 222. The support frame plate 26 is provided with an infrared transmitter 29 and an infrared receiver 211 on both sides of the opening of one end of the placement groove 215; the inner wall of the placement groove 215 is provided with a movable plate 216, and one side of the movable plate 216 is detachably connected to the collection frame 210, and the movable plate 216 is fixedly connected to a baffle 218 on one side of the collection frame 210, and the baffle A sponge pad 217 is fixedly connected to the upper end of the plate 218 close to the collecting frame 210, and the height of the baffle 218 is higher than the height of one end of the collecting frame 210; a step limit groove 219 is opened on one side of the placement groove 215, and a telescopic spring 220 is arranged inside the step limit groove 219, and the two ends of the telescopic spring 220 are respectively fixedly connected to the inner wall of the step limit groove 219 and one end side wall of the movable plate 216, and one end of the movable plate 216 is slidingly connected to the inner wall of the step limit groove 219.

[0043] It should be noted that the arrangement of the groove 221 can increase the friction effect between the extrusion wheel 23 and the wire material when feeding the wire, thereby reducing the slipping phenomenon. At the same time, a connecting plate 213 meshing with the groove 221 is provided on one side of the extrusion wheel 23. Therefore, when feeding the wire, the wire feeding motor 21 drives the driving gear 24 to rotate. Due to the meshing connection between the driving gear 24 and the wire feeding gear 25, and the action of the bearing seat 27, the wire feeding gear 25 drives the extrusion wheel 23 to rotate. When the extrusion wheel 23 rotates, the rotating column 2 is driven by the cooperation of the groove 221 and the connecting plate 213. 14 is rotated, and at the same time, in the process of meshing between the connecting plate 213 and the groove 221, the cleaning groove 222 can squeeze the impurities inside the groove 221, and dig out the impurities during separation, so as to clean the groove 221 and reduce the influence of impurities on the transmission effect, thereby ensuring the friction effect between the extrusion wheel 23 and the wire material and reducing the occurrence of slippage; in addition, a signal can be sent out by the set infrared transmitter 29 and received by the infrared receiver 211 to detect whether there is an obstacle between the two, and the signal can be fed back to the control panel 15;

[0044] During the rotation of the rotating column 214, the corresponding connecting plate 213 will squeeze the baffle 218 and drive the movable plate 216 to slide on the inner wall of the stepped limiting groove 219, so that the telescopic spring 220 is compressed. At this time, the impurities attached to the connecting plate 213 can be scraped and cleaned through the sponge pad 217 to ensure the cleaning effect next time. When the corresponding connecting plate 213 is separated from the baffle 218 due to rotation, the baffle 218 rebounds by the elasticity of the telescopic spring 220 before the next connecting plate 213 arrives, and then performs the above movement with the next connecting plate 213. When the surface of the extrusion wheel 23 is worn to a certain extent, the connecting plate 213 is no longer transmitted to the groove 221 and The rotating column 214 can be allowed to rotate freely. At this time, the baffle 218 is no longer squeezed, and the telescopic spring 220 (compressed in the initial state) begins to recover elastically and drives the movable plate 216 to move inside the step limit groove 219, and finally one end of the collecting frame 210 moves out of the placement groove 215. At this moment, the side walls of the collecting frame 210 will block the signals of the infrared transmitter 29 and the infrared receiver 211. After the control panel 15 receives the signal, it immediately controls the wire feeding motor 21 to stop rotating and replaces the extrusion wheel 23, so as to realize real-time monitoring of the wear of the extrusion wheel 23. The structure is simple, the detection cost is reduced, and the collecting frame 210 can be disassembled and cleaned during replacement.

[0045] Reference Figure 3 , Figure 4 , Figure 5 and Figure 7, further; the clamping assembly 4 includes a connecting rod 41, a transfer rod 42, an adapting cylinder 43, an adjusting rod 44 and a pressing plate 46, one end of the pressing plate 46 is rotatably connected to the support frame plate 26, a limiting hole 48 is provided on one side of the pressing plate 46, a side wall of the pressing plate 46 is rotatably connected to a wire pressing wheel 47, the other end of the pressing plate 46 is fixedly connected to the connecting rod 41, the other end of the connecting rod 41 is rotatably connected to the transfer rod 42, and a limiting slide groove 421 is provided on the transfer rod 42, and the limiting slide groove 421 is connected to the adapting One end of the tube 43 is limited for sliding, and a pair of rollers 431 are provided inside the adapting tube 43; one end of the adjusting rod 44 is detachably connected to the adapter rod 42, and a gasket 441, a buffer spring 442 and an adjusting nut 443 are sleeved on the outer wall of the adjusting rod 44, and the adjusting nut 443 is threadedly connected to the adjusting rod 44, and the two ends of the buffer spring 442 are respectively in contact with the gasket 441 and the adjusting nut 443, and the adjusting rod 44 is connected to a fixing plate 45, and the fixing plate 45 is fixedly connected to the outer wall of the wire feeding motor 21.

[0046] It should be noted that the adjusting rod 44 can be connected to the transfer rod 42, and then the adjusting nut 443 can be rotated according to the thickness of the wire, and the connecting rod 41, the transfer rod 42, the fixing plate 45 and the pressing plate 46 can be used to drive the wire pressing wheel 47 to approach or move away from the extrusion wheel 23, so as to ensure the corresponding friction between the extrusion wheel 23 and the wire pressing wheel 47, so as to better feed wires of different diameters. In addition, during the feeding process, when the diameter of the wire is uneven, the buffer spring 442 can be used to drive the wire pressing wheel 47 to perform adaptive adjustment to avoid the extrusion wheel 23 from being uneven. Grab the wire and feed it into the nozzle smoothly, thereby affecting the printing effect. In addition, during the printing process, due to the movement of the wire feeding assembly 2, the wire can drive the adaptation tube 43 to slide inside the limiting slide groove 421 during the transportation process, and cooperate with the function of the roller 431 to effectively avoid the wire from getting stuck during use, thereby increasing the smoothness of wire feeding. In addition, when the wire feeding assembly 2 works normally but printing problems occur, the adapter rod 42 can be separated from the adjustment rod 44, and the pressure plate 46 can be rotated to unfold the wire pressing wheel 47 to facilitate the inspection of the inside of the support frame plate 26.

[0047] The working principle of the wire feeding device for filamentary 3D printing materials is as follows: during operation, the wire feeding motor 21 drives the driving gear 24 to rotate, and cooperates with the bearing seat 27 to make the wire feeding gear 25 drive the extrusion wheel 23 to rotate. While the extrusion wheel 23 rotates, the cooperation of the groove 221 and the connecting plate 213 drives the rotating column 214 to rotate. At the same time, in the process of the connecting plate 213 meshing with the groove 221, the cleaning groove 222 can squeeze the impurities inside the groove 221, and dig out the impurities during separation, thereby cleaning the groove 221 and reducing the influence of impurities on the transmission effect; in the process of the rotation of the rotating column 214, the corresponding connecting plate 213 will squeeze the baffle 218, and drive the movable plate 216 to slide on the inner wall of the step limit groove 219, so that the telescopic spring 220 is compressed. The sponge pad 217 can be used to scrape and clean the impurities attached to the connecting plate 213 to ensure the cleaning effect next time. When the corresponding connecting plate 213 is separated from the baffle 218 due to rotation, the next connecting plate 213 repeats the above movement. After the surface of the extrusion wheel 23 is worn to a certain extent, the connecting plate 213 is no longer engaged with the groove 221 for transmission. At this time, the baffle 218 is no longer squeezed, and the telescopic spring 220 begins to recover elastically and drives the movable plate 216 to move inside the stepped limit groove 219, and finally one end of the collection frame 210 moves out of the placement groove 215. At this moment, the side walls of the collection frame 210 on both sides will block the signals of the infrared transmitter 29 and the infrared receiver 211. After the control panel 15 receives the signal, it immediately controls the wire feeding motor 21 to stop rotating and replace the extrusion wheel 23;

[0048] The clamping assembly 4 can rotate the adjusting nut 443 according to the thickness of the wire, and cooperate with the connecting rod 41, the adapter rod 42, the fixing plate 45 and the pressing plate 46 to ensure the corresponding friction between the extrusion wheel 23 and the wire pressing wheel 47, so as to better feed wires of different diameters. In the feeding process, when the diameter of the wire is uneven, the wire pressing wheel 47 can be driven by the buffer spring 442 to perform adaptive adjustment to avoid the phenomenon that the extrusion wheel 23 cannot evenly grasp the wire. In addition, during the printing process, due to the movement of the wire feeding assembly 2, the wire can drive the adaptation tube 43 and the roller 431 during the transportation process, which can effectively avoid the wire from getting stuck during use and increase the smoothness of wire feeding.

[0049] It should be noted that the specific model and specifications of the motor need to be selected and determined based on the actual specifications of the device, and the specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A wire feeding device for filamentary 3D printing materials, comprising a printing mechanism (1), wherein the printing mechanism (1) comprises a Y-direction movable guide frame (11), a Z-direction movable guide frame (12), an X-direction movable guide frame (16) and a bottom plate (17), wherein the Z-direction movable guide frame (12) is connected to a wire unwinding frame (14) and a control panel (15), and the wire unwinding frame (14) is rotatably connected to a wire unwinding drum (13), characterized in that: Also includes: A wire feeding assembly (2), a spraying assembly (3) and a pressing assembly (4); The spraying assembly (3) is located below the wire feeding assembly (2); The pressing assembly (4) is fixedly connected to the wire feeding assembly (2); The wire feeding assembly (2) comprises a wire feeding motor (21), a movable mounting plate (22) and a support frame plate (26); the support frame plate (26) is fixedly connected to the wire feeding motor (21) and the movable mounting plate (22) by bolts respectively; the movable mounting plate (22) is connected to an X-axis movable guide rail frame (16); and a driving gear (24) is provided at the output end of the wire feeding motor (21); Bearing seats (27) are provided on both sides of the front end of the support frame plate (26); an extrusion wheel (23) is fixedly connected to the inner ring side wall of the bearing seat (27); a wire feeding gear (25) is fixedly connected to one end of the extrusion wheel (23); the wire feeding gear (25) is meshingly connected to the driving gear (24); a fixing piece (28) is provided at the other end of the extrusion wheel (23); and a plurality of grooves (221) distributed in a circumferential array are provided on the middle outer wall of the extrusion wheel (23); The support frame plate (26) is provided with a placement groove (215) on one side of the extrusion wheel (23), and a material discharge hole (212) is provided on the support frame plate (26) below the extrusion wheel (23). The placement groove (215) is rotatably connected to a rotating column (214), and the outer wall of the rotating column (214) is fixedly connected to a plurality of connecting plates (213) meshing with the grooves (221), and one end of the connecting plate (213) away from the rotating column (214) is arc-shaped and has a cleaning groove (222). The support frame plate (26) is provided with an infrared transmitter (29) and an infrared receiver (211) on both sides of an opening at one end of the placement groove (215); A movable plate (216) is provided on the inner wall of the placement groove (215); one side of the movable plate (216) is detachably connected to a collection frame (210); a baffle (218) is fixedly connected to one side of the collection frame (210) of the movable plate (216); a sponge pad (217) is fixedly connected to the upper end of the baffle (218) close to the collection frame (210); and the height of the baffle (218) is higher than the height of one end of the collection frame (210); A step limit groove (219) is provided on one side of the placement groove (215), a telescopic spring (220) is provided inside the step limit groove (219), two ends of the telescopic spring (220) are respectively fixedly connected to the inner wall of the step limit groove (219) and one end side wall of the movable plate (216), and one end of the movable plate (216) is slidably connected to the inner wall of the step limit groove (219); The clamping assembly (4) comprises a connecting rod (41), a transfer rod (42), an adapting cylinder (43), an adjusting rod (44) and a pressing plate (46), one end of the pressing plate (46) is rotatably connected to the support frame plate (26), a limiting hole (48) is provided on one side of the pressing plate (46), a side wall of the pressing plate (46) is rotatably connected to a thread pressing wheel (47), the other end of the pressing plate (46) is fixedly connected to the connecting rod (41), the other end of the connecting rod (41) is rotatably connected to the transfer rod (42), a limiting slide groove (421) is provided on the transfer rod (42), the limiting slide groove (421) and one end of the adapting cylinder (43) are limitedly slidable, and a pair of rollers (431) are provided inside the adapting cylinder (43); One end of the adjusting rod (44) is detachably connected to the transfer rod (42); a gasket (441), a buffer spring (442) and an adjusting nut (443) are sleeved on the outer wall of the adjusting rod (44); the adjusting nut (443) is threadedly connected to the adjusting rod (44); two ends of the buffer spring (442) are respectively in contact with the gasket (441) and the adjusting nut (443); the adjusting rod (44) is connected to a fixing plate (45); and the fixing plate (45) is fixedly connected to the outer wall of the wire feeding motor (21).

2. A wire feeding device for filamentary 3D printing materials according to claim 1, characterized in that: The bottom plate (17) is slidably connected to the Y-direction movable guide frame (11), the Y-direction movable guide frame (11) is fixedly connected to the Z-direction movable guide frame (12), the Z-direction movable guide frame (12) is fixedly connected to the X-direction movable guide frame (16), the upper end of the Z-direction movable guide frame (12) is fixedly connected to the wire placing frame (14), and the rear side wall of the Z-direction movable guide frame (12) is fixedly connected to the control panel (15).

3. A wire feeding device for filamentary 3D printing materials according to claim 2, characterized in that: The spray assembly (3) comprises a frame one (31), a spray head (32), a heating nozzle (33) and a frame two (34); the frame one (31) is fixedly connected to the movable mounting plate (22) by bolts; the frame one (31) is located above the frame two (34); the frame two (34) is fixedly connected to the support frame plate (26); the spray head (32) and the heating nozzle (33) are fixedly connected; and one end of the heating nozzle (33) is fixedly connected to the support frame plate (26).

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