CN114834039B - Auxiliary online heating device and method for fused deposition additive manufacturing system - Google Patents
Auxiliary online heating device and method for fused deposition additive manufacturing system Download PDFInfo
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- CN114834039B CN114834039B CN202210388936.0A CN202210388936A CN114834039B CN 114834039 B CN114834039 B CN 114834039B CN 202210388936 A CN202210388936 A CN 202210388936A CN 114834039 B CN114834039 B CN 114834039B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
- B29C64/295—Heating elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/10—Processes of additive manufacturing
- B29C64/106—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
- B29C64/118—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using filamentary material being melted, e.g. fused deposition modelling [FDM]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
- B29C64/227—Driving means
- B29C64/236—Driving means for motion in a direction within the plane of a layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
The invention provides an auxiliary online heating device and method of a fused deposition additive manufacturing system, wherein the device comprises the following components: the heating device comprises a bottom plate, an x-direction moving device, a y-direction moving device and a heating source, wherein the heating source is arranged on the x-direction moving device; when the y-direction moving device is static, starting the x-direction moving device to realize the reciprocating movement of the y-direction moving device so as to realize the reciprocating movement of the heating source in the x-direction; when the x-direction moving device is stationary, the y-direction moving device moves to and fro along the y direction by the heating source. The invention enables the auxiliary heating source to be integrated in the chamber shell of the fused deposition system, thereby avoiding the increase of the whole volume of the additive manufacturing system due to the additional addition of the heating source.
Description
Technical Field
The invention relates to the technical field of additive manufacturing, in particular to an auxiliary online heating device and method of a fused deposition additive manufacturing system.
Background
The external heating source equipped in the current additive manufacturing system is mostly integrated on the nozzle, and the path track of the external heating source is coincident with the nozzle.
Because the external heating source provided by the existing additive manufacturing system is integrated on the nozzle, the moving route track of the external heating source is overlapped with the nozzle, the heating range is small, the heating is uneven, and the heating area is limited by the printing path. The temperature difference between adjacent layers of deposited material cannot be maintained at a small level, so that the bonding quality between fused deposition layers is reduced, and finally, the mechanical properties of the molded part manufactured by additive are not ideal.
Disclosure of Invention
According to the above-mentioned external heating source provided by the existing additive manufacturing system is integrated on the nozzle, so that the moving route track of the external heating source coincides with the nozzle, the heating range is small, the heating is uneven, and the heating area is limited by the printing path; the temperature difference between adjacent layers of deposited materials cannot be maintained at a small level, so that the bonding quality between fused deposition layers is reduced, and finally, the technical problem of unsatisfactory mechanical properties of molded parts produced by additive manufacturing is solved. The planar movement design scheme of the invention enables the auxiliary heating source to be integrated in the chamber shell of the fused deposition system, thereby avoiding the increase of the whole volume of the additive manufacturing system due to the additional addition of the heating source. The movement mode of the device is divided into transverse movement and longitudinal movement, the y-direction movement of the heating device is realized by controlling the positive and negative rotation of the y-direction gear to drive the belt to move, and the x-direction movement of the heating device is realized by fixing the rotation of the y-direction gear and the positive and negative rotation of the x-direction gear, wherein a heating source is integrated at the position of the x-direction motor. The invention is applied to the fused deposition additive manufacturing of high-performance thermoplastic polymer materials, assists the integration of an online heating device, can keep the temperature difference between deposition material layers in a smaller range in the additive manufacturing process, further enhances the bonding quality between the deposition material layers, and improves the mechanical property of the thermoplastic materials manufactured by the additive with high efficiency under the condition of no thermal post-treatment.
The invention adopts the following technical means:
an auxiliary online heating device of a fused deposition additive manufacturing system, comprising: the heating device comprises a bottom plate, an x-direction moving device, a y-direction moving device and a heating source, wherein the heating source is arranged on the x-direction moving device; when the y-direction moving device is static, starting the x-direction moving device to realize the reciprocating movement of the y-direction moving device so as to realize the reciprocating movement of the heating source in the x-direction; when the x-direction moving device is stationary, the y-direction moving device moves to and fro along the y direction by the heating source.
Further, the y-direction moving device comprises a driving mechanism, a moving mechanism and a guide rail, the driving mechanism is arranged on the bottom plate, the moving mechanism is connected with the driving mechanism, the guide rail is arranged on the bottom plate and connected with the moving mechanism, and the x-direction moving device is connected with the moving mechanism; when the x-direction moving device is stationary, the driving mechanism is used for realizing the reciprocating movement of the moving mechanism along the guide rail in the y direction, and simultaneously, the x-direction moving device and the heating source are carried for moving; when the y-direction moving device is stationary, the x-direction moving device is started to realize the reciprocating movement of the x-direction moving device, which carries the heating source, on the moving mechanism in the x direction.
Further, the moving mechanism comprises a sliding rail, a guide rail pulley support and guide rail sliding blocks, the x-direction moving device is connected to the sliding rail, two guide rail pulley supports are respectively arranged at two ends of the sliding rail, each guide rail pulley support is provided with one guide rail sliding block, two guide rails are arranged on the guide rail, guide rail grooves are formed in the side wall of each guide rail, the two guide rail sliding blocks are respectively connected with the two guide rail grooves in a sliding mode, and the moving mechanism can reciprocate on the guide rail with the x-direction moving device and the heating source.
Further, the driving mechanism comprises two y-direction motors arranged on the bottom plate, four guide rail pulleys arranged on the guide rail pulley support, two corner pulleys arranged on the bottom plate and a belt, wherein the two y-direction motors arranged above and the two corner pulleys arranged below are distributed at four corners of the outer sides of the two guide rails, the four guide rail pulleys arranged in the middle are distributed at the upper side and the lower side of the two ends of the guide rail pulley support, and the x-direction moving device is positioned between the guide rail pulleys on the two sides;
the belt is wound on the outer sides of the two y-direction motors and the two corner pulleys, is wound on the inner sides of the four guide rail pulleys at the same time, penetrates through a belt port arranged on the x-direction moving device, and the y-direction motors are connected with the belt in a matched manner to form driving force; the driving belt pulls the guide rail pulley to drive the guide rail pulley support to reciprocate along the guide rail in the y direction through the positive and negative rotation of the two opposite rotating y-direction motors.
Further, the belt is a toothed belt, each y-direction motor is connected with a y-direction gear, the y-direction gears are meshed with teeth arranged on one surface of the toothed belt, and the heating source can reciprocate in the y direction through the positive and negative rotation of the two y-direction motors with opposite rotation directions.
Further, the guide rail pulley and the corner pulley are respectively provided with a belt chute, the belt chute is a toothed belt chute, and the belt is wound in the belt chute; and the bottom plate is provided with a y-direction motor fixing groove and a corner pulley fixing groove which are respectively used for fixing the y-direction motor and the corner pulley.
Further, the x-direction moving device comprises an x-direction motor shell, an x-direction motor sliding chute and an x-direction motor, wherein the x-direction motor is fixed inside the x-direction motor shell, an x-direction gear is connected to a motor shaft of the x-direction motor, an x-direction motor shell cover is arranged at the front end of the x-direction motor shell, and a heating source is fixed on the outer wall of the x-direction motor shell cover; a belt opening is formed in the x-direction motor shell cover and used for enabling a toothed belt of the y-direction moving device to pass through; an x-direction motor sliding groove is formed in the x-direction motor and is connected with a sliding rail of the y-direction moving device in a matched mode; an x-direction gear connected with the x-direction motor is meshed with teeth arranged on the other surface of the toothed belt to form driving force, and the x-direction moving device is driven to carry out reciprocating movement along the x direction along the sliding rail by the heating source.
Further, a revolute pair is arranged between the two ends of the heating source and the x-direction motor shell cover, so that the heating source and the printing layer form an acute angle, and the heating efficiency is ensured; the x-direction motor shell cover is of a detachable structure and is detachably connected with the x-direction motor shell, so that the internal x-direction motor can be conveniently inspected or repaired.
The invention also provides an auxiliary online heating method of the auxiliary online heating device of the fused deposition additive manufacturing system, which comprises the following steps:
the method comprises the steps that firstly, four auxiliary online heating devices of a fused deposition additive manufacturing system are adopted, all the auxiliary online heating devices with the same structure are vertically placed and connected to form a closed four-side containing cavity, and the fused deposition additive manufacturing system is placed in the auxiliary online heating devices; setting the printing directions of a fused deposition additive manufacturing system as X, gamma and Z, wherein the X, gamma directions form a printing plane and are parallel to a material substrate, and the Z direction is a material stacking direction and is perpendicular to the material substrate; the global coordinate system combined by the four auxiliary online heating devices is alpha, beta and gamma, the alpha and beta directions are X and gamma directions corresponding to the printing direction of the fused deposition additive manufacturing system in a plane, and the gamma direction is Z direction corresponding to the printing direction of the fused deposition additive manufacturing system in a space;
step two, the x and y moving directions of the auxiliary online heating device respectively refer to left and right moving in a plane in the front view direction and up and down moving in the plane in the front view direction; the alpha and beta moving tracks combined by the four auxiliary online heating devices are matched with the matched printing tracks of the fused deposition additive manufacturing system, and when the fused deposition additive manufacturing system performs printing movement on the current layer, the x-direction moving devices positioned in the alpha and beta directions move in the same direction with the corresponding directions of the extruder of the fused deposition additive manufacturing system; when the fused deposition additive manufacturing system performs the next layer printing movement, the y-direction moving device in the gamma direction moves in the same direction with the extruder of the fused deposition additive manufacturing system;
step three, the X-direction movement of the auxiliary online heating device is controlled by an X-direction motor; when the fused deposition additive manufacturing system performs planar printing on the current layer, a y-direction motor of the auxiliary online heating device does not work, an x-direction motor receives signals, an x-direction gear is meshed with a toothed belt, and at the moment, the relative movement of the gear and the rack is equivalent to the same-direction movement with the printing direction;
step four, the y-direction movement of the auxiliary online heating device is controlled by a y-direction motor; when the fused deposition additive manufacturing system performs planar printing on the current layer, an x-direction motor of the auxiliary online heating device does not work, two y-direction gears respectively rotate clockwise and anticlockwise and drive a belt to move, at the moment, two guide rail pulleys on the same side as the y-direction gears rotate anticlockwise and clockwise, and corner pulleys on the same side as the y-direction gears rotate clockwise and anticlockwise and drive a guide rail to move in the y direction;
and fifthly, the motion is transmitted through gears and a bidirectional toothed belt.
Compared with the prior art, the invention has the following advantages:
1. the auxiliary online heating device and the auxiliary online heating method for the fused deposition additive manufacturing system have high integration, can be directly used as a shell of the open additive manufacturing system, are convenient to manufacture and are easy to process. The external heating source can move in a two-dimensional plane through simple forward rotation and reverse rotation by controlling the fixation and rotation of the gears.
2. The auxiliary online heating device and the auxiliary online heating method for the fused deposition additive manufacturing system, provided by the invention, can be used as the shell of the open additive manufacturing system, and can be used for heating printed products in multiple directions and at multiple angles. When a certain layer is printed, the previous layer of the layer is heated in multiple directions, so that the two layers are fully adhered, and the aim of enhancing the interlayer binding force of a final printed product is fulfilled.
In summary, by applying the technical scheme of the invention, the problems that the external heating source provided by the existing additive manufacturing system is integrated on the nozzle, so that the moving route track of the external heating source coincides with the nozzle, the heating range is small, the heating is uneven, and the heating area is limited by the printing path can be solved; the temperature difference between adjacent layers of deposited materials cannot be kept at a small level, so that the bonding quality between fused deposition layers is reduced, and finally, the problem of unsatisfactory mechanical properties of the molded part of the additive manufacturing is caused.
For the reasons, the invention can be widely popularized in the fields of fused deposition additive manufacturing of high-performance thermoplastic polymer materials and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to the drawings without inventive effort to a person skilled in the art.
Fig. 1 is a schematic diagram of an online heating moving structure of an open additive manufacturing system provided by the present invention.
Fig. 2 is a three-dimensional view of the present invention.
Fig. 3 is a three-dimensional perspective view of the present invention.
Fig. 4 is a schematic structural diagram of a base plate of the mobile device of the present invention.
Fig. 5 is a schematic structural view of the moving mechanism of the present invention.
Fig. 6 is a schematic structural view of the corner pulley of the present invention.
Fig. 7 is a schematic view of the structure of the guide rail pulley of the present invention.
Fig. 8 is a schematic view of the structure of the toothed belt of the present invention.
Fig. 9 is a schematic structural diagram of an x-direction motor according to the present invention.
Fig. 10 is a schematic view of the y-direction motor of the present invention.
Fig. 11 is a three-dimensional perspective view of an x-direction moving structure of a heating source according to the present invention.
Fig. 12 is a three-dimensional view of an x-direction moving structure of a heating source according to the present invention.
Fig. 13 is a three-dimensional view of the assembled device.
In the figure: 1. a y-direction motor; 2. an x-direction motor casing; 3. a guide rail pulley; 4. a corner pulley; 5. y-direction motor fixing grooves; 6. a guide rail; 7. a guide rail groove; 8. corner pulley fixed slot; 9. a guide rail pulley support; 10. a guide rail slide block; 11. a belt chute; 12. an x-direction motor chute; 13. an x-direction motor; 14. a belt opening; 15. an x-direction motor shell cover; 16. and (3) heating a source.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be clear that the dimensions of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
In the description of the present invention, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present invention: the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present invention.
As shown in fig. 1-13, the present invention provides an auxiliary in-line heating apparatus for a fused deposition additive manufacturing system, comprising: the device comprises a base plate, an x-direction moving device, a y-direction moving device and a heating source 16, wherein the heating source 16 is arranged on the x-direction moving device, the x-direction moving device is connected with the y-direction moving device, and the y-direction moving device is arranged on the base plate; when the y-direction moving device is stationary, the x-direction moving device is started to realize the reciprocating movement of the heating source 16 on the y-direction moving device so as to realize the reciprocating movement of the heating source 16 in the x-direction; when the x-direction moving device is stationary, the y-direction moving device moves to and fro along the heating source 16 in the y-direction by the movement of the y-direction moving device.
As a preferred embodiment, the y-direction moving device comprises a driving mechanism, a moving mechanism and a guide rail 6, wherein the driving mechanism is arranged on the bottom plate, the moving mechanism is connected with the driving mechanism, the guide rail 6 is arranged on the bottom plate and connected with the moving mechanism, and the x-direction moving device is connected with the moving mechanism; when the x-direction moving device is stationary, the driving mechanism is used for realizing the reciprocating movement of the moving mechanism along the guide rail 6 in the y direction, and simultaneously, the moving mechanism moves along with the x-direction moving device and the heating source 16; when the y-direction moving device is stationary, the x-direction moving device is started to realize the reciprocating movement of the x-direction moving device along with the heating source 16 on the moving mechanism in the x-direction.
As a preferred embodiment, the moving mechanism comprises a sliding rail, a guide rail pulley support 9 and guide rail sliding blocks 10, the x-direction moving device is connected to the sliding rail, two guide rail pulley supports 9 are respectively arranged at two ends of the sliding rail, one guide rail sliding block 10 is respectively arranged on each guide rail pulley support 9, two guide rails 6 are arranged, guide rail grooves 7 are respectively formed in the outer side wall of each guide rail 6, the two guide rail sliding blocks 10 are respectively connected with the two guide rail grooves 7 in a sliding manner, and the moving mechanism carries the x-direction moving device heating source 16 to reciprocate on the guide rails 6.
As a preferred embodiment, the driving mechanism comprises two y-direction motors 1 installed on a bottom plate, four guide rail pulleys 3 installed on a guide rail pulley support 9, two corner pulleys 4 installed on the bottom plate and a belt, wherein the two y-direction motors 1 placed above and the two corner pulleys 4 placed below are distributed at four corners on the outer sides of the two guide rails 6, the four guide rail pulleys 3 placed in the middle are distributed on the upper side and the lower side of two ends of the guide rail pulley support 9, and an x-direction moving device is positioned between the guide rail pulleys 3 on two sides; the belt is wound on the outer sides of the two y-direction motors 1 and the two corner pulleys 4, and meanwhile, the upper and lower sides of the belt are concavely wound on the inner sides of the four guide rail pulleys 3 and penetrate through a belt port 14 arranged on the x-direction moving device, and the y-direction motors 1 are connected with the belt in a matched manner to form driving force; the driving belt pulls the guide rail pulley 3 to carry the guide rail pulley support 9 to reciprocate along the guide rail 6 in the y direction through the positive and negative rotation of the two opposite rotating y-direction motors 1. Specifically, in this embodiment, two y-direction motors 1 are disposed at left and right corners in the upper horizontal direction, two corner pulleys 4 are disposed at left and right corners in the lower horizontal direction, the central axis of the left y-direction motor 1 may coincide with the central axis of the left corner pulley 4 in the vertical direction, the central axis of the right y-direction motor 1 may coincide with the central axis of the right corner pulley 4 in the vertical direction, the two y-direction motors 1 and the two corner pulleys 4 form a quadrangle, and four guide rail pulleys 3 are located inside the quadrangle.
As a preferred embodiment, the belt is a toothed belt (double-sided toothed belt, namely, the whole belt has teeth on both sides), each y-direction motor 1 is connected with a gear, the gears are meshed with teeth arranged on one side of the toothed belt, and the heating source 16 can reciprocate in the y direction through the forward and reverse rotation of the two y-direction motors 1 with opposite rotation directions.
As a preferred embodiment, the guide rail pulley 3 and the corner pulley 4 are provided with a belt chute 11, the belt chute 11 is a toothed belt chute, and the belt is wound in the belt chute 11; the bottom plate is provided with a y-direction motor fixing groove 5 and a corner pulley fixing groove 8 which are respectively used for fixing the y-direction motor 1 and the corner pulley 4.
As a preferred embodiment, the x-direction moving device comprises an x-direction motor casing 2, an x-direction motor chute 12 and an x-direction motor 13, wherein the x-direction motor 13 is fixed inside the x-direction motor casing 2, a motor shaft is connected with a gear, an x-direction motor casing cover 15 is arranged at the front end of the x-direction motor casing 2, and a heating source 16 is fixed on the outer wall of the x-direction motor casing cover 15; a belt opening 14 is formed in the x-direction motor shell cover 15 and is used for enabling a toothed belt of the y-direction moving device to pass through; an x-direction motor chute 12 is arranged on the x-direction motor 13, and the x-direction motor chute 12 is connected with a slide rail of the y-direction moving device in a matched manner; the gear connected with the x-direction motor 13 is meshed with the teeth arranged on the other surface of the toothed belt to form driving force, and the x-direction moving device is driven to carry the heating source 16 to reciprocate along the sliding rail in the x direction.
As a preferred embodiment, a revolute pair is arranged between the two ends of the heating source 16 and the x-direction motor shell cover 15, so that the heating source 16 and the printing layer form an acute angle, and the heating efficiency is ensured; the x-direction motor shell cover 15 is of a detachable structure and is detachably connected with the x-direction motor shell 2, so that the internal x-direction motor 13 can be conveniently checked or repaired.
Specifically, the device is divided into x-direction (transverse) movement and y-direction (longitudinal) movement, wherein the x-direction movement is controlled by the positive and negative rotation of an x-direction gear of an x-direction motor, and the y-direction movement is controlled by the simultaneous reverse rotation of two y-direction gears. The x-direction moving mode of the device is as follows: the two y-direction gears are fixed to enable the belt to be static, at the moment, the x-direction gears of the x-direction motor rotate positively and negatively to drive the whole x-direction motor to transversely move on the toothed belt, at the moment, the static toothed belt is in meshed connection with the x-direction motor corresponding to the gear and the rack, the x-direction motor sliding groove enables the x-direction motor to transversely move relative to the sliding rail, the heating source is fixed with the x-direction motor, and transverse movement of the heating source in a plane is completed. The y-direction moving mode of the device is as follows: the left y-gear rotates clockwise (or anticlockwise), the right y-gear rotates anticlockwise (or clockwise), and the belt passes through the belt opening 14 and completes the longitudinal movement of the slide rail in the plane through the rotation of the guide rail pulley 3 and the corner pulley 4. The corner pulley 4 of the device is fixed on the bottom plate and can be used as a revolute pair; the guide pulley 3 is fixed on the guide pulley support 9 and can be used as a revolute pair. The guide rail sliding block 10 is in clearance fit with the guide rail groove 7, so that the sliding rail can longitudinally move relative to the bottom plate.
The invention also provides an auxiliary online heating method of the auxiliary online heating device of the fused deposition additive manufacturing system, which comprises the following steps:
step one, the auxiliary online heating device of the fused deposition additive manufacturing system provided by the invention is vertically arranged, four identical auxiliary online heating devices are vertically arranged and connected to form a closed four-sided cavity, and the fused deposition additive manufacturing system is arranged in the auxiliary online heating device (namely, the fused deposition additive manufacturing system is arranged in the four-sided cavity). The alpha and beta moving directions of the four auxiliary online heating devices after combination correspond to the X and Y printing directions of the fused deposition additive manufacturing system. The gamma direction moving direction of the four auxiliary online heating devices is perpendicular to the x direction moving direction of the auxiliary online heating devices, and corresponds to the Z direction printing direction of the fused deposition additive manufacturing system;
and step two, the x and y direction moving directions of the auxiliary online heating device of the fused deposition additive manufacturing system provided by the invention respectively refer to left and right movement in a plane in the front view direction and up and down movement in the plane in the front view direction. The alpha, beta and gamma moving tracks combined by the four auxiliary online heating devices are matched with the matched printing tracks of the fused deposition additive manufacturing system, and when the fused deposition additive manufacturing system performs printing movement on the current layer, the x-direction moving device positioned in the alpha and beta directions moves in the same direction with the extruder of the fused deposition additive manufacturing system; when the fused deposition additive manufacturing system performs the next layer printing movement, the y-direction moving device in the gamma direction moves in the same direction with the extruder of the fused deposition additive manufacturing system;
and step three, the x-direction movement (the same principle of the combined alpha and beta-direction movement) of an auxiliary online heating device of the fused deposition additive manufacturing system is controlled by an x-direction motor 13. When the fused deposition additive manufacturing system performs planar printing on the current layer, the y-direction motor 1 of the auxiliary online heating device does not work, the x-direction motor 13 (the combined alpha-direction motor and the combined beta-direction motor are the same) receives signals, the x-direction gear is meshed with the toothed belt, and at the moment, the relative movement of the gear and the rack is equivalent, and the same-direction movement is performed with the printing direction;
and step four, the y-direction movement of an auxiliary online heating device of the fused deposition additive manufacturing system is controlled by a y-direction motor 1. When the fused deposition additive manufacturing system performs planar printing on the current layer, the x-direction motor 13 of the auxiliary online heating device does not work, the two y-direction gears respectively rotate clockwise and anticlockwise and drive the belt to move, at the moment, the two guide rail pulleys 3 on the same side as the y-direction gears rotate anticlockwise and clockwise, the corner pulleys 4 on the same side as the y-direction gears rotate clockwise and anticlockwise and drive the guide rail 6 to move in the y direction;
and fifthly, the motion is transmitted through the gear of the motor and the bidirectional toothed belt.
The planar movement design scheme of the auxiliary online heating device of the fused deposition additive manufacturing system enables an auxiliary heating source to be integrated in a chamber shell of the fused deposition system, and avoids the increase of the whole volume of the additive manufacturing system due to the additional addition of the heating source. The movement modes of the device are divided into transverse movement and longitudinal movement. The y-direction movement of the heating device is realized by controlling the positive and negative rotation of the y-direction gear to drive the belt to move, and the x-direction movement of the heating device is realized by fixing the rotation of the y-direction gear and the positive and negative rotation of the x-direction gear, wherein the heating source is integrated at the position of the x-direction motor. The invention is applied to the fused deposition additive manufacturing of high-performance thermoplastic polymer materials. The integration of the auxiliary online heating device can keep the temperature difference between the deposition material layers in a smaller range in the process of additive manufacturing, so that the bonding quality between the deposition material layers is enhanced, and the mechanical property of the thermoplastic material manufactured by the additive is improved with high efficiency under the condition of no thermal aftertreatment.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (8)
1. An auxiliary online heating method of an auxiliary online heating device of a fused deposition additive manufacturing system, characterized in that the auxiliary online heating device of the fused deposition additive manufacturing system comprises: the heating device comprises a base plate, an x-direction moving device, a y-direction moving device and a heating source (16), wherein the heating source (16) is arranged on the x-direction moving device, the x-direction moving device is connected with the y-direction moving device, and the y-direction moving device is arranged on the base plate; when the y-direction moving device is static, starting the x-direction moving device to realize the reciprocating movement of the y-direction moving device so as to realize the reciprocating movement of the heating source (16) in the x direction; when the x-direction moving device is stationary, the x-direction moving device carries the heating source (16) to carry out the reciprocating movement in the y direction through the movement of the y-direction moving device;
the auxiliary online heating method of the auxiliary online heating device of the fused deposition additive manufacturing system comprises the following steps:
the method comprises the steps that firstly, four auxiliary online heating devices of a fused deposition additive manufacturing system are adopted and are vertically placed, the four auxiliary online heating devices with the same structure are vertically placed and connected to form a closed four-side containing cavity, and the fused deposition additive manufacturing system is placed in the auxiliary online heating devices; setting the printing directions of a fused deposition additive manufacturing system as X, gamma and Z, wherein the X, gamma directions form a printing plane and are parallel to a material substrate, and the Z direction is a material stacking direction and is perpendicular to the material substrate; the global coordinate system combined by the four auxiliary online heating devices is alpha, beta and gamma, the alpha and beta directions are X and gamma directions corresponding to the printing direction of the fused deposition additive manufacturing system in a plane, and the gamma direction is Z direction corresponding to the printing direction of the fused deposition additive manufacturing system in a space;
step two, the x and y moving directions of the auxiliary online heating device respectively refer to left and right moving in a plane in the front view direction and up and down moving in the plane in the front view direction; the alpha and beta moving tracks combined by the four auxiliary online heating devices are matched with the matched printing tracks of the fused deposition additive manufacturing system, and when the fused deposition additive manufacturing system performs printing movement on the current layer, the x-direction moving devices positioned in the alpha and beta directions move in the same direction with the corresponding directions of the extruder of the fused deposition additive manufacturing system; when the fused deposition additive manufacturing system performs the next layer printing movement, the y-direction moving device in the gamma direction moves in the same direction with the extruder of the fused deposition additive manufacturing system;
step three, the X-direction movement of the auxiliary online heating device is controlled by an X-direction motor (13); when the fused deposition additive manufacturing system performs planar printing on the current layer, a y-direction motor (1) of the auxiliary online heating device does not work, an x-direction motor (13) receives signals, an x-direction gear is meshed with a toothed belt, and at the moment, the relative movement of a gear and a rack is equivalent, and the same-direction movement is performed with the printing direction;
step four, the y-direction movement of the auxiliary online heating device is controlled by a y-direction motor (1); when the fused deposition additive manufacturing system performs planar printing on the current layer, an x-direction motor (13) of the auxiliary online heating device does not work, two y-direction gears respectively rotate clockwise and anticlockwise and drive a belt to move, at the moment, two guide rail pulleys (3) on the same side as the y-direction gears rotate anticlockwise and clockwise, and a corner pulley (4) on the same side as the y-direction gears rotate clockwise and anticlockwise and drive a guide rail (6) to move in the y direction;
and fifthly, the motion is transmitted through gears and a bidirectional toothed belt.
2. The method of on-line heating assisted by an on-line heating assisted by a fused deposition additive manufacturing system according to claim 1, wherein the y-direction moving device comprises a driving mechanism, a moving mechanism and a guide rail (6), the driving mechanism is mounted on a base plate, the moving mechanism is connected with the driving mechanism, the guide rail (6) is mounted on the base plate and connected with the moving mechanism, and the x-direction moving device is connected with the moving mechanism; when the x-direction moving device is stationary, the driving mechanism is used for realizing the reciprocating movement of the moving mechanism along the guide rail (6) in the y direction, and simultaneously, the moving mechanism moves along with the x-direction moving device and the heating source (16); when the y-direction moving device is stationary, the x-direction moving device is started to realize the reciprocating movement of the x-direction moving device along with the heating source (16) on the moving mechanism in the x-direction.
3. The auxiliary online heating method of the auxiliary online heating device of the fused deposition additive manufacturing system according to claim 2, wherein the moving mechanism comprises a sliding rail, a guide rail pulley support (9) and guide rail sliding blocks (10), the x-direction moving device is connected to the sliding rail, two guide rail pulley supports (9) are respectively arranged at two ends of the sliding rail, one guide rail sliding block (10) is respectively arranged on each guide rail pulley support (9), two guide rails (6) are respectively provided with two guide rail grooves (7) on the side wall of each guide rail (6), and the two guide rail sliding blocks (10) are respectively connected with the two guide rail grooves (7) in a sliding mode, so that the moving mechanism can reciprocate on the guide rails (6) with the x-direction moving device and the heating source (16).
4. An auxiliary on-line heating method of an auxiliary on-line heating device of a fused deposition additive manufacturing system according to claim 3, wherein the driving mechanism comprises two y-direction motors (1) installed on a bottom plate, four guide rail pulleys (3) installed on a guide rail pulley support (9), two corner pulleys (4) installed on the bottom plate and a belt, the two y-direction motors (1) arranged above and the two corner pulleys (4) arranged below are distributed at four corners on the outer sides of the two guide rails (6), the four guide rail pulleys (3) arranged in the middle are distributed on the upper side and the lower side of two ends of the guide rail pulley support (9), and the x-direction moving device is positioned between the guide rail pulleys (3) on two sides;
the belt is wound on the outer sides of the two y-direction motors (1) and the two corner pulleys (4), is wound on the inner sides of the four guide rail pulleys (3) and penetrates through a belt port (14) arranged on the x-direction moving device, and the y-direction motors (1) are connected with the belt in a matched mode to form driving force; the driving belt pulls the guide rail pulley (3) to carry out the reciprocating movement along the guide rail (6) along the guide rail pulley support (9) through the positive and negative rotation of the two opposite rotating y-direction motors (1).
5. The auxiliary on-line heating method of the auxiliary on-line heating device of the fused deposition additive manufacturing system according to claim 4, wherein the belt is a toothed belt, each y-direction motor (1) is connected with a y-direction gear, the y-direction gears are in meshed connection with teeth arranged on one surface of the toothed belt, and the heating source (16) is reciprocally moved in the y direction through the positive and negative rotations of the two y-direction motors (1) with opposite rotation directions.
6. The auxiliary online heating method of the auxiliary online heating device of the fused deposition additive manufacturing system according to claim 4, wherein the guide rail pulley (3) and the corner pulley (4) are provided with belt sliding grooves (11), the belt sliding grooves (11) are toothed belt grooves, and the belt is wound in the belt sliding grooves (11); the bottom plate is provided with a y-direction motor fixing groove (5) and a corner pulley fixing groove (8) which are respectively used for fixing the y-direction motor (1) and the corner pulley (4).
7. The auxiliary online heating method of the auxiliary online heating device of the fused deposition additive manufacturing system according to claim 1, wherein the x-direction moving device comprises an x-direction motor shell (2), an x-direction motor sliding chute (12) and an x-direction motor (13), the x-direction motor (13) is fixed inside the x-direction motor shell (2), an x-direction gear is connected to a motor shaft of the x-direction motor shell, an x-direction motor shell cover (15) is arranged at the front end of the x-direction motor shell (2), and a heating source (16) is fixed on the outer wall of the x-direction motor shell cover (15); a belt opening (14) is formed in the x-direction motor shell cover (15) and is used for enabling a toothed belt of the y-direction moving device to pass through; an x-direction motor chute (12) is arranged on the x-direction motor (13), and the x-direction motor chute (12) is connected with a slide rail of the y-direction moving device in a matched manner; an x-direction gear connected with the x-direction motor (13) is meshed with teeth arranged on the other surface of the toothed belt to form driving force, and the x-direction moving device is driven to reciprocate along the sliding rail by the heating source (16).
8. The auxiliary online heating method of the auxiliary online heating device of the fused deposition additive manufacturing system according to claim 7, wherein a revolute pair is arranged between two ends of the heating source (16) and the x-direction motor shell cover (15), so that the heating source (16) and the printing layer form an acute angle, and the heating efficiency is ensured; the x-direction motor shell cover (15) is of a detachable structure and is detachably connected with the x-direction motor shell (2), so that the internal x-direction motor (13) can be conveniently checked or repaired.
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