3D printing shearing device

Abstract

The utility model discloses a 3D printing cutting device, which relates to the technical field of composite material 3D printing and comprises a printer, the printer comprises a throat pipe, a heating module is arranged on the throat pipe, a cutting opening is formed in a part of the throat pipe above the heating module, a supporting plate is fixedly arranged on the printer, a cutting blade is movably arranged on the supporting plate, and a cutting blade is arranged on the cutting blade. A driving device which is in transmission connection with the shearing blade is arranged on the supporting plate, and the driving device can drive the shearing blade to extend into the shearing opening so as to shear the continuous fiber composite material in the throat pipe. According to the 3D printing shearing device, the continuous fiber composite material can be sheared off before being heated, the shearing efficiency is improved, and the situation that the continuous fiber composite material is difficult to shear off after being heated and softened is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of composite material 3D printing, in particular to a 3D printing shearing device. Background Art

[0002] Continuous fiber reinforced composite materials have been widely used and paid attention to in high-end manufacturing fields such as aerospace and automobiles due to their corrosion resistance, light weight and excellent mechanical properties. The use of 3D printing technology to manufacture continuous fiber reinforced composite materials has been a research hotspot in recent years. However, due to the continuity of the continuous fibers in the 3D printing process, when the path jump is required, spider-web-like fiber lines will be generated inside the printed part, which greatly affects the molding quality of the printed part. Therefore, a device that can cut the continuous fibers is needed.

[0003] Existing continuous fiber cutting devices are mainly divided into proximal cutting and distal cutting. Proximal cutting refers to cutting the continuous fiber composite material after it is extruded through the nozzle, and distal cutting refers to cutting the continuous fiber composite material before it is heated and melted. When using the proximal cutting method, the continuous fiber composite material has been heated and melted when it is extruded through the nozzle and is in a molten state. The fiber filaments also become soft due to high temperature, making them difficult to cut. When cutting, the nozzle needs to be raised or the printing platform needs to be lowered to leave space for the cutting blade, thereby reducing printing efficiency. Although the general distal cutting method can avoid the above problems, it has disadvantages such as poor reliability and complex structure. Utility Model Content

[0004] The purpose of the utility model is to provide a 3D printing shearing device to solve the problems existing in the above-mentioned prior art, and can shear the continuous fiber composite material before heating, thereby improving the shearing efficiency and avoiding the difficulty in shearing the continuous fiber composite material after softening due to heating.

[0005] To achieve the above purpose, the utility model provides the following solutions:

[0006] The utility model provides a 3D printing shearing device, comprising a printer, the printer comprising a throat, a heating module is arranged on the throat, a shearing opening is opened on the part of the throat located above the heating module, a support plate is fixedly arranged on the printer, a shearing blade is movably arranged on the support plate, a driving device connected to the shearing blade in transmission is arranged on the support plate, and the driving device can drive the shearing blade to extend into the shearing opening to shear the continuous fiber composite material in the throat.

[0007] Preferably, a clamping groove is fixedly arranged at the bottom of the support plate, the shearing blade is movably arranged in the clamping groove, a return spring is fixedly arranged in the clamping groove, the return spring is connected with the shearing blade, the driving device can drive the shearing blade to extend out of the clamping groove to cut the continuous fiber composite material in the throat tube, and the shearing blade can be reset under the elastic force of the return spring.

[0008] Preferably, a sliding block is slidably connected in the clamping groove, the sliding block is L-shaped, a sliding part is formed at the top end of the sliding block, an installation part is formed at the bottom end of the sliding block, the sliding part is slidably connected in the clamping groove, a butting part is arranged on the support plate, one end of the return spring is fixed on the butting part, the other end is fixedly connected with the sliding part, the shearing blade is fixedly arranged on the installation part, and the driving device is in transmission connection with the sliding block.

[0009] Preferably, an installation groove for placing the shearing blade is formed in the installation part, and one end of a bolt without a nut can sequentially pass through a pressing piece, the shearing blade and the installation part and be in threaded connection with a nut to fix the shearing blade on the installation part.

[0010] Preferably, the driving device comprises a shearing motor and a cam fixedly arranged at the output end of the shearing motor, the cam can abut against the installation part, and the shearing motor can drive the cam to rotate to push the sliding block to slide in the clamping groove.

[0011] Preferably, a guide rod is fixedly arranged in the clamping groove, the guide rod can pass through the sliding part and be slidably connected with the sliding part, and the return spring is sleeved on the guide rod.

[0012] Preferably, the 3D printer further comprises a mounting plate and an extrusion module fixedly arranged on the mounting plate, the support plate is fixedly arranged on the mounting plate, the throat tube is connected and communicated with the extrusion module, an X-axis optical rod can pass through the mounting plate and be slidably connected with the mounting plate, a sliding bearing is fixedly arranged on the support plate, and the sliding bearing is slidably connected with the X-axis optical rod.

[0013] The utility model has achieved the following technical effects compared with the prior art:

[0014] The 3D printing shearing device provided by the utility model cuts the continuous fiber prepreg that has not been melted by driving the shearing blade to extend into the shearing opening at the position above the heating module on the throat tube. The device has a simple structure and high shearing efficiency. Description of the Drawings

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] Figure 1 Schematic structural diagram of the 3D printing cutting device provided by the present invention;

[0017] Figure 2 Left view of the 3D printing cutting device provided by the present invention;

[0018] Figure 3 Schematic structural diagram of the support plate provided by the present invention;

[0019] Figure 4 Schematic structural diagram of the card slot provided by the present invention;

[0020] Figure 5 Working principle control flowchart of the 3D printing cutting device provided by the present invention;

[0021] In the figure: 1 - cutting motor; 2 - support plate; 3 - X-axis optical rod; 4 - sliding bearing; 5 - cam; 6 - card slot; 7 - slider; 8 - heating module; 9 - cutting blade; 10 - throat; 11 - mounting plate; 12 - return spring; 13 - bolt; 14 - pressing piece; 15 - nut; 16 - extrusion module; 17 - guide rod. Specific embodiments

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0023] The purpose of the present invention is to provide a 3D printing cutting device to solve the problems existing in the prior art, which can cut the continuous fiber composite material before heating, improve the cutting efficiency, and avoid the difficulty of cutting the continuous fiber composite material after heating and softening.

[0024] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0025] The present invention provides a 3D printing cutting device, such asFigures 1 to 5 As shown, the printer includes a throat 10, a heating module 8 is arranged on the throat 10, a shearing opening is opened on the part of the throat 10 located above the heating module 8, a support plate 2 is fixedly arranged on the printer, a shearing blade 9 is movably arranged on the support plate 2, a driving device connected to the shearing blade 9 is arranged on the support plate 2, and the driving device can drive the shearing blade 9 to extend into the shearing opening to shear the continuous fiber composite material in the throat 10.

[0026] In some embodiments, a slot 6 is provided at the bottom of the support plate 2, and the slot 6 is fixedly connected to the support plate 2 by bolts. The shearing blade 9 is movably arranged in the slot 6. A return spring 12 is fixedly arranged in the slide rail formed inside the slot 6. One end of the return spring 12 is fixed to the abutment portion of the support plate 2, and the other end of the return spring 12 is connected to the shearing blade 9. The driving device can drive the shearing blade 9 to extend from the slot 6 to shear the continuous fiber composite material in the throat 10, and the shearing blade 9 can be reset under the elastic force of the return spring 12.

[0027] In some embodiments, a slider 7 is slidably connected in the slot 6, and the slider 7 is L-shaped. A sliding portion is formed at the top of the slider 7, and a mounting portion is formed at the bottom of the slider 7. The sliding portion is slidably connected to the slot 6. A contact portion is provided on the support plate 2. One end of a reset spring 12 is fixed on the contact portion, and the other end is fixedly connected to the sliding portion. The shearing blade 9 is fixedly arranged on the mounting portion, and the driving device is transmission-connected to the slider 7. During the shearing process of the shearing blade 9, the reset spring 12 is compressed between the sliding portion and the abutting portion. After the shearing is completed, the slider 7 drives the shearing blade 9 to reset under the elastic force of the reset spring 12.

[0028] In some embodiments, a mounting groove for placing the shearing blade 9 is opened on the mounting portion, and one end of a bolt 13 without a nut can pass through the pressing plate 14, the shearing blade 9 and the mounting portion in sequence and be threadedly connected with a nut 15 to fix the shearing blade 9 on the mounting portion, and the end of the shearing blade 9 can extend from the mounting groove.

[0029] In some embodiments, the driving device includes a shearing motor 1 and a cam 5 fixedly arranged at the output end of the shearing motor 1. The cam 5 is connected to the output shaft of the shearing motor 1 through a rotating rod. The cam 5 can be fixed on the rotating rod by a headless bolt. The cam 5 can abut against the mounting part. The shearing motor 1 can drive the cam 5 to rotate to push the slider 7 to slide in the slot 6. A groove for placing the shearing motor 1 is opened on the support plate 2, and the shearing motor 1 can be fixed in the groove on the support plate 2 by bolts.

[0030] In some embodiments, a guide rod 17 is fixedly arranged on the inner wall of the card slot 6. The guide rod 17 extends along the extending direction of the slide rail. The guide rod 17 can pass through the sliding part and be slidably connected with the sliding part. The return spring 12 is sleeved on the guide rod 17. By arranging the guide rod 17, the sliding of the slider 7 can be guided, and at the same time, the position of the return spring 12 can be prevented from shifting.

[0031] In some embodiments, the 3D printer further includes a mounting plate 11 and an extrusion module 16 fixedly arranged on the mounting plate 11. The extrusion module 16 includes an extrusion motor, a feeding mechanism, a heat sink and a cooling fan. The support plate 2 is located on the left side of the mounting plate 11 and is fixedly connected to the mounting plate 11 by bolts. The throat tube 10 is connected and communicated with the extrusion module 16. The X-axis optical rod 3 can pass through the mounting plate 11 and be slidably connected with the mounting plate 11. Preferably, there are two X-axis optical rods 3. Corresponding grooves for placing the sliding bearings 4 are formed on the support plate 2. The two sliding bearings 4 can be respectively fixed in the grooves by bolts. The two sliding bearings 4 are respectively slidably connected to different X-axis optical rods 3.

[0032] The object of the present utility model is to provide a 3D printing shearing device. The working process is as follows: during 3D printing, the continuous fiber prepreg is conveyed to the throat tube 10 by the feeding mechanism in the extrusion module 16, then heated and melted in the heating module 8 and finally extruded through the nozzle. A shearing port is formed on the throat tube 10. The shearing blade 9 is horizontally aligned with the shearing port. The shearing port is located directly above the nozzle. Let the distance from the shearing port to the nozzle orifice be x. When a path jump is required, the shearing point is at a distance of x before the jump point in the G-code. A shearing instruction is added to the shearing point (and a pause instruction is additionally added to pause for 1 - 2 s to reduce the shearing error). When the G-code runs to the shearing point, a shearing instruction will be sent to the lower computer. At this time, the lower computer will control the shearing motor 1 to rotate, so that the rotating rod connected to the shearing motor 1 will rotate accordingly. The cam 5 at the bottom of the rotating rod will impact the L-shaped slider 7. The shearing blade 9 is fixed to the L-shaped slider 7. Therefore, the shearing blade 9 will move towards the shearing port of the throat tube 10 together with the L-shaped slider 7, so as to cut off the continuous fiber prepreg and realize the shearing function. Finally, the return spring 12 can push the L-shaped slider 7 backward to realize the reset function. The guide rod 17 can prevent the return spring 12 from shifting sideways. The moving distance of the shearing blade 9 just does not impact the inner wall of the throat tube 10, avoiding deformation and damage of the throat tube 10 due to impact. Since the continuous fiber prepreg has not been melted yet when passing through the throat tube 10, it can be more easily cut, improving the efficiency of 3D printing, reducing the manufacturing cost and having high applicability.

[0033] In the present utility model, specific examples are used to illustrate the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model; at the same time, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation on the present utility model.

Claims

1. A 3D printing shearing device, comprising a printer, the printer including a throat tube, and a heating module is provided on the throat tube, characterized in that: A shearing opening is provided on the portion of the throat located above the heating module, a support plate is fixedly provided on the printer, a shearing blade is movably provided on the support plate, a driving device which is transmission-connected to the shearing blade is provided on the support plate, and the driving device can drive the shearing blade to extend into the shearing opening to shear the continuous fiber composite material in the throat.

2. The 3D printing shearing device according to claim 1, wherein: A slot is fixedly provided at the bottom of the support plate, and the shearing blade is movably provided in the slot. A return spring is fixedly provided in the slot, and the return spring is connected to the shearing blade. The driving device can drive the shearing blade to extend from the slot to shear the continuous fiber composite material in the throat, and the shearing blade can be reset under the action of the return spring elastic force.

3. The 3D printing shearing device according to claim 2, wherein: A slider is slidably connected in the slot, the slider is L-shaped, a sliding portion is formed at the top of the slider, and a mounting portion is formed at the bottom of the slider. The sliding portion is slidably connected in the slot, and an abutment portion is provided on the support plate. One end of the return spring is fixed to the abutment portion, and the other end is fixedly connected to the sliding portion. The shearing blade is fixedly arranged on the mounting portion, and the driving device is transmission-connected to the slider.

4. The 3D printing shearing device according to claim 3, wherein: The mounting portion is provided with a mounting groove capable of placing a shearing blade, and an end of a bolt without a nut can sequentially pass through the pressing plate, the shearing blade and the mounting portion and be threadedly connected with a nut to fix the shearing blade on the mounting portion.

5. The 3D printing shearing device according to claim 3, characterized in that: The driving device comprises a shearing motor and a cam fixedly arranged at the output end of the shearing motor, the cam can abut against the mounting portion, and the shearing motor can drive the cam to rotate to push the slider to slide in the slot.

6. The 3D printing shearing device according to claim 3, characterized in that: A guide rod is fixedly arranged in the slot, the guide rod can pass through the sliding part and be slidably connected with the sliding part, and the return spring is sleeved on the guide rod.

7. The 3D printing shearing device according to claim 1, characterized in that: The printer also includes a mounting plate and an extrusion module fixedly arranged on the mounting plate, the support plate is fixedly arranged on the mounting plate, the throat is connected and communicated with the extrusion module, the X-axis optical rod can pass through the mounting plate and be slidably connected to the mounting plate, a sliding bearing is fixedly arranged on the support plate, and the sliding bearing is slidably connected to the X-axis optical rod.

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