CN114834039A

CN114834039A - Auxiliary online heating device and method for fused deposition additive manufacturing system

Info

Publication number: CN114834039A
Application number: CN202210388936.0A
Authority: CN
Inventors: 王肇贵; 刘熙睿; 方震宇
Original assignee: Dalian Maritime University
Current assignee: Dalian Maritime University
Priority date: 2022-04-13
Filing date: 2022-04-13
Publication date: 2022-08-02
Anticipated expiration: 2042-04-13
Also published as: CN114834039B

Abstract

The invention provides an auxiliary online heating device and method of a fused deposition additive manufacturing system, wherein the device comprises: the heating source 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 bottom plate; when the y-direction moving device is static, starting the x-direction moving device to realize the reciprocating movement of the x-direction moving device on 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 static, the x-direction moving device drives the heating source to carry out reciprocating movement in the y direction through the movement of the y-direction moving device. 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

Auxiliary online heating device and method for fused deposition additive manufacturing system

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

Most of external heating sources equipped in the current additive manufacturing system are integrated on the nozzle, and the moving path track of the external heating sources is coincident with the nozzle.

Because the external heating source that present additive manufacturing system was equipped is integrated on the nozzle, leads to external heat source moving's route orbit and nozzle coincidence, and the heating zone is little and the heating is inhomogeneous, and the heating zone receives the restriction of printing route. 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 mechanical properties of the additive manufacturing molded part are not ideal.

Disclosure of Invention

According to the method, the external heating source equipped in the existing additive manufacturing system is integrated on the nozzle, so that the moving path track of the external heating source is overlapped with the nozzle, the heating range is small and 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 kept at a small level, so that the bonding quality between fused deposition layers is reduced, and finally the mechanical performance of an additive manufacturing molded part is not ideal. The planar motion 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 heat source. The motion 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 forward and reverse rotation of the y-direction gear to drive the belt to move, the x-direction movement of the heating device is realized by fixing the rotation of the y-direction gear and the forward and reverse rotation of the x-direction gear, and the heating source is integrated at the position of the x-direction motor. The invention is applied to the melting 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 efficiently improves the mechanical performance of the additive manufacturing thermoplastic materials under the condition of not depending on thermal post-treatment.

The technical means adopted by the invention are as follows:

an auxiliary in-line heating apparatus of a fused deposition additive manufacturing system, comprising: the heating source 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 bottom plate; when the y-direction moving device is static, starting the x-direction moving device to realize the reciprocating movement of the x-direction moving device on 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 static, the x-direction moving device drives the heating source to carry out reciprocating movement in the y direction through the movement of the y-direction moving device.

Furthermore, the y-direction moving device comprises a driving mechanism, a moving mechanism and a guide rail, the driving mechanism is installed on the bottom plate, the moving mechanism is connected with the driving mechanism, the guide rail is installed 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 static, the driving mechanism realizes the reciprocating movement of the moving mechanism along the guide rail in the y direction, and simultaneously drives the x-direction moving device and the heating source to move; and when the y-direction moving device is static, the x-direction moving device is started to realize the reciprocating movement of the x-direction moving device and the heating source on the moving mechanism in the x direction.

Further, moving mechanism includes slide rail, guide rail pulley holds in the palm and the guide rail slider, and x is connected on the slide rail to the mobile device, and the both ends of slide rail respectively set up a guide rail pulley and hold in the palm, and every guide rail pulley holds in the palm and respectively sets up a guide rail slider, and the guide rail is equipped with two, has all seted up the guide rail groove on the lateral wall of every guide rail, and two guide rail sliders respectively with two guide rail groove sliding connection, realize that moving mechanism takes x to carry out reciprocating motion on the guide rail to mobile device and heating source.

Furthermore, the driving mechanism comprises two y-direction motors arranged on the bottom plate, four guide rail pulleys arranged on a guide rail pulley support, two corner pulleys arranged on the bottom plate and a belt, 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 and lower sides of two ends of the guide rail pulley support, and the x-direction moving device is positioned between the guide rail pulleys at 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 and penetrates through a belt opening formed in the x-direction moving device, and the y-direction motors are connected with the belt in a matched mode to form driving force; the driving belt pulls the guide rail pulley to drive the guide rail pulley holder to reciprocate along the guide rail in the y direction through the positive and negative rotation of the two y-direction motors rotating in opposite directions.

Furthermore, 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 forward and reverse rotation of the two y-direction motors with opposite rotation directions.

Furthermore, belt sliding grooves are formed in the guide rail pulleys and the corner pulleys, the belt sliding grooves are belt grooves with teeth, and a belt is wound in the belt sliding grooves; 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.

Furthermore, the x-direction moving device comprises an x-direction motor shell, an x-direction motor chute and an x-direction motor, the x-direction motor is fixed inside the x-direction motor shell, a motor shaft of the x-direction motor is connected with an x-direction gear, an x-direction motor shell cover is arranged at the front end of the x-direction motor shell, and the 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 casing cover and is used for a toothed belt of the y-direction moving device to penetrate through; an x-direction motor chute is arranged on the x-direction motor and is connected with a guide rail pulley support of the y-direction moving device in a matching way; an x-direction gear connected to the x-direction motor is meshed with teeth arranged on the other surface of the toothed belt to form a driving force, and the x-direction moving device is driven to drive the heating source to carry out reciprocating movement in the x direction along the guide rail pulley support.

Furthermore, a rotating pair is arranged between two ends of the heating source and the x-direction motor casing cover, so that the heating source and the printing layer form an acute angle, and the heating efficiency is ensured; the x is to motor case lid is detachable construction, with x to carrying out the dismantlement between the motor case and be connected, be convenient for inspect or repair inside x to the motor.

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 following steps that firstly, four auxiliary online heating devices of the fused deposition additive manufacturing system are vertically placed, the four auxiliary online heating devices with the same structure are vertically placed and connected to form a closed four-side cavity, and the fused deposition additive manufacturing system is placed inside the auxiliary online heating devices; setting the printing directions of the fused deposition additive manufacturing system as X, y and Z, wherein the X and y directions form a printing plane and are parallel to the material substrate, and the Z direction is a material stacking direction and is vertical to the material substrate; setting global coordinate systems of the four auxiliary online heating devices after combination as alpha, beta and gamma, setting alpha and beta directions as X and gamma directions corresponding to the printing direction of the fused deposition additive manufacturing system in a plane, and setting the gamma direction as a Z direction corresponding to the printing direction of the fused deposition additive manufacturing system in a space;

secondly, the x and y directions of movement of the auxiliary online heating device respectively mean to move left and right in the plane of the front view direction and move up and down in the plane of the front view direction; when the fused deposition additive manufacturing system performs printing movement on the current layer, the x-direction moving devices in the alpha and beta directions move in the same direction as the corresponding direction of the fused deposition additive manufacturing system extruder; when the fused deposition additive manufacturing system performs next layer printing movement, the y-direction moving device in the gamma direction moves in the same direction as 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 plane printing on the current layer, the y-direction motor of the auxiliary online heating device does not work, the x-direction motor receives signals, and the x-direction gear is meshed with the toothed belt, so that the relative movement of the gear and the rack is equivalent to the movement of the gear and the rack in the same direction as 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 plane 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 with the y-direction gears rotate anticlockwise and clockwise, and a corner pulley on the same side with the y-direction gears rotate clockwise and anticlockwise to drive a guide rail to move in the y direction;

and step five, the motion is transmitted with the bidirectional toothed belt through a gear.

Compared with the prior art, the invention has the following advantages:

1. the auxiliary online heating device and the method for the fused deposition additive manufacturing system have high integratability, can be directly used as a shell of an open additive manufacturing system, and are convenient to manufacture and easy to process. The external heating source can move in a two-dimensional plane through simple forward rotation and reverse rotation movement by controlling the fixation and rotation of the gear.

2. The auxiliary online heating device and the method for the fused deposition additive manufacturing system provided by the invention have the advantages that the device is used as the shell of the open additive manufacturing system, and the printed product can be heated in multiple directions and 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 bonded, and the aim of enhancing the bonding force between the layers of the final printed product is fulfilled.

In conclusion, the technical scheme of the invention can solve the problems that the path track of the external heat source is overlapped with the nozzle, the heating range is small and the heating is uneven, and the heating area is limited by the printing path because the external heat source equipped in the existing additive manufacturing system is integrated on the nozzle; 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 undesirable mechanical properties of the additive manufacturing molded part is caused.

Based on 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 needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of an on-line heating moving structure of an open additive manufacturing system according to 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 bottom plate of a mobile device according to the present invention.

Fig. 5 is a schematic structural diagram 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 a toothed belt of the present invention.

Fig. 9 is a schematic structural diagram of the x-direction motor of the present invention.

Fig. 10 is a schematic structural view of the y-direction motor of the present invention.

Fig. 11 is a three-dimensional perspective view of a heating source x-direction moving structure according to the present invention.

Fig. 12 is a three-dimensional view of a heating source x-direction moving structure according to the present invention.

Fig. 13 is a three-dimensional assembled view of the 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. a y-direction motor fixing groove; 6. a guide rail; 7. a guide rail groove; 8. a corner pulley fixing groove; 9. a guide rail pulley support; 10. a guide rail slider; 11. a belt chute; 12. an x-direction motor chute; 13. an x-direction motor; 14. a belt opening; 15. an x-direction motor casing cover; 16. a heat source.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

In order to make the objects, 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 with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present 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 invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the 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. Any specific values in all examples shown and discussed herein are to be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the absence of any contrary indication, these directional terms are not intended to indicate and imply that the device or element so referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be considered as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … … surface," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship 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 of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

As shown in fig. 1-13, the present invention provides an auxiliary in-line heating apparatus of a fused deposition additive manufacturing system, comprising: 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 bottom plate; when the y-direction moving device is static, the x-direction moving device is started to realize the reciprocating movement of the y-direction moving device 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 means is stationary, the x-direction moving means reciprocates in the y direction with the heating source 16 by the movement of the y-direction moving means.

As a preferred embodiment, the y-direction moving device comprises a driving mechanism, a moving mechanism and a guide rail 6, the driving mechanism is installed on the bottom plate, the moving mechanism is connected with the driving mechanism, the guide rail 6 is installed 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 static, the driving mechanism realizes the reciprocating movement of the moving mechanism along the guide rail 6 in the y direction, and simultaneously drives the x-direction moving device and the heating source 16 to move; when the y-direction moving device is stationary, the x-direction moving device is activated to reciprocate the x-direction moving device with the heating source 16 in the x-direction on the moving mechanism.

As a preferred embodiment, the moving mechanism includes a slide rail, a guide rail pulley holder 9 and two guide rail sliders 10, the x-direction moving device is connected to the slide rail, two ends of the slide rail are respectively provided with one guide rail pulley holder 9, each guide rail pulley holder 9 is provided with one guide rail slider 10, two guide rails 6 are provided, a guide rail groove 7 is formed in the outer side wall of each guide rail 6, and the two guide rail sliders 10 are respectively connected with the two guide rail grooves 7 in a sliding manner, so that the moving mechanism drives the x-direction moving device heating source 16 to reciprocate on the guide rail 6.

As a preferred embodiment, the driving mechanism comprises two y-direction motors 1 arranged on a bottom plate, four guide rail pulleys 3 arranged on a guide rail pulley support 9, two corner pulleys 4 arranged on the bottom plate and a belt, wherein the two y-direction motors 1 arranged above and the two corner pulleys 4 arranged below are distributed at four corners outside two guide rails 6, the four guide rail pulleys 3 arranged in the middle are distributed at the upper and lower sides of two ends of the guide rail pulley support 9, and an x-direction moving device is positioned between the guide rail pulleys 3 at two sides; the belt is wound on the outer sides of the two y-direction motors 1 and the two corner pulleys 4, the upper side and the lower side of the belt are inwards concave and wound on the inner sides of the four guide rail pulleys 3 and penetrate through a belt opening 14 formed in the x-direction moving device, and the y-direction motor 1 is connected with the belt in a matched mode to form driving force; the driving belt pulls the guide rail pulley 3 to drive the guide rail pulley bracket 9 to carry out reciprocating movement in the y direction along the guide rail 6 through the positive and negative rotation of the two y-direction motors 1 which rotate in opposite directions. Specifically, in the present embodiment, two y-motors 1 are disposed at the left and right corners of the upper horizontal direction, two corner pulleys 4 are disposed at the left and right corners of the lower horizontal direction, the central axis of the left y-motor 1 can coincide with the central axis of the left corner pulley 4 in the vertical direction, the central axis of the right y-motor 1 can coincide with the central axis of the right corner pulley 4 in the vertical direction, the two y-motors 1 and the two corner pulleys 4 form a quadrangle, and the four guide rail pulleys 3 are located inside the quadrangle.

In a preferred embodiment, the belt is a toothed belt (double-sided toothed belt, i.e. both sides of the whole belt are toothed), each y-direction motor 1 is connected with a gear, the gear is engaged with the teeth arranged on one side of the toothed belt, and the heating source 16 is reciprocated in the y-direction by 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 both provided with a belt chute 11, the belt chute 11 is a belt chute with teeth, and a belt is wound in the belt chute 11; and 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 gear is connected to a motor shaft of the x-direction motor casing, 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 casing cover 15 and is used for a toothed belt of the y-direction moving device to penetrate 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 guide rail pulley support 9 of the y-direction moving device in a matching way; the gear connected to the x-direction motor 13 is engaged with the teeth on the other side of the toothed belt to form a driving force, and the x-direction moving device is driven to drive the heating source 16 to reciprocate along the guide rail pulley support 9 in the x direction.

As a preferred embodiment, a rotating pair is arranged between two ends of the heating source 16 and the x-direction motor casing cover 15, so that the heating source 16 and the printing layer form an acute angle, and the heating efficiency is ensured; the x is to motor casing lid 15 is detachable construction, with x to carrying out the dismantlement between motor casing 2 and be connected, the x of being convenient for inspection or repairing inside is to motor 13.

Specifically, the device is divided into x-direction (transverse) movement and y-direction (longitudinal) movement, wherein the x-direction movement is controlled by the forward and reverse 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, the x-direction gear of the x-direction motor rotates forwards and reversely at the moment to drive the x-direction motor to move transversely on the belt with teeth integrally, the static belt with teeth and the x-direction motor are equivalent to the engagement connection of the gears and the racks, the x-direction motor sliding groove enables the x-direction motor to move transversely relative to the sliding rail, and the heating source is fixed with the x-direction motor to finish the transverse movement of the heating source in a plane. The y-direction moving mode of the device is as follows: the left y-direction gear rotates clockwise (or anticlockwise), the right y-direction gear rotates anticlockwise (or clockwise), and the belt passes through the belt opening 14 and completes the longitudinal movement of the sliding rail in a 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 holder 9 and can be used as a revolute pair. The guide rail slide block 10 is in clearance fit with the guide rail groove 7, and the longitudinal movement of the slide rail relative to the bottom plate can be realized.

in the first step, the auxiliary online heating devices of the fused deposition additive manufacturing system provided by the invention are vertically arranged, four identical auxiliary online heating devices are vertically arranged and connected to form a closed four-surface cavity, and the fused deposition additive manufacturing system is arranged inside the auxiliary online heating devices (namely the fused deposition additive manufacturing system is arranged in the four-surface cavity). The alpha and beta directions of the four auxiliary online heating devices after combination correspond to the X and Y directions of the fused deposition additive manufacturing system. The gamma-direction moving direction of the combined 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-direction moving direction and the y-direction moving direction of the auxiliary online heating device of the fused deposition additive manufacturing system provided by the invention respectively mean to move left and right in the plane of the front view direction and move up and down in the plane of the front view direction. When the fused deposition additive manufacturing system performs printing movement on the current layer, the x-direction moving devices in the alpha and beta directions move in the same direction as the extruder of the fused deposition additive manufacturing system; when the fused deposition additive manufacturing system performs next layer printing movement, the y-direction moving device in the gamma direction moves in the same direction as the extruder of the fused deposition additive manufacturing system;

step three, the x-direction movement (the same principle of the combined alpha and beta-direction movement) of the auxiliary online heating device of the fused deposition additive manufacturing system is controlled by the x-direction motor 13. When the fused deposition additive manufacturing system performs plane 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 and beta-direction motors are the same in principle) receives signals, and the x-direction gear is meshed with the toothed belt, namely the relative movement of the gear and the rack at the moment and performs the same-direction movement with the printing direction;

step four, the y-direction movement of the 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 plane 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 with the y-direction gears rotate anticlockwise and clockwise, and the corner pulley 4 on the same side with the y-direction gears rotate clockwise and anticlockwise to drive the guide rail 6 to move in the y direction;

and step five, the motion is transmitted with a bidirectional toothed belt through a gear of a motor.

The plane movement design scheme of the auxiliary online heating device of the fused deposition additive manufacturing system enables the auxiliary heating source to be integrated in the 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 heat source. The motion 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 forward and reverse rotation of the y-direction gear to drive the belt to move, the x-direction movement of the heating device is realized by fixing the rotation of the y-direction gear and the forward and reverse rotation of the x-direction gear, and the heating source is integrated at 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 small range in the additive manufacturing process, so that the bonding quality between the deposition material layers is enhanced, and the mechanical performance of the additive manufacturing thermoplastic material is improved with high efficiency under the condition of not using thermal post-treatment.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An auxiliary in-line heating apparatus of a fused deposition additive manufacturing system, comprising: 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 bottom plate; when the y-direction moving device is static, the x-direction moving device is started to realize the reciprocating movement of the y-direction moving device 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 x-direction moving device carries the heating source (16) to reciprocate in the y direction through the movement of the y-direction moving device.

2. The auxiliary in-line heating apparatus for a fused deposition additive manufacturing system according to claim 1, wherein the y-direction moving apparatus comprises a driving mechanism, a moving mechanism and a guide rail (6), the driving mechanism is mounted on the 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 apparatus is connected with the moving mechanism; when the x-direction moving device is static, the driving mechanism realizes that the moving mechanism carries out reciprocating movement in the y direction along the guide rail (6), and simultaneously drives the x-direction moving device and the heating source (16) to move; when the y-direction moving device is static, the x-direction moving device is started to realize the reciprocating movement of the x-direction moving device and the heating source (16) on the moving mechanism in the x direction.

3. The auxiliary on-line heating device of the fused deposition additive manufacturing system according to claim 2, wherein the moving mechanism comprises a slide rail, two guide rail pulley holders (9) and two guide rail sliders (10), the x-direction moving device is connected to the slide rail, two ends of the slide rail are respectively provided with one guide rail pulley holder (9), each guide rail pulley holder (9) is provided with one guide rail slider (10), two guide rails (6) are provided, a guide rail groove (7) is formed in the side wall of each guide rail (6), and the two guide rail sliders (10) are respectively connected with the two guide rail grooves (7) in a sliding manner, so that the moving mechanism drives the x-direction moving device and the heating source (16) to reciprocate on the guide rails (6).

4. The auxiliary in-line heating apparatus for a fused deposition additive manufacturing system according to claim 3, wherein the driving mechanism comprises two y-motors (1) mounted on a base plate, four guide pulleys (3) mounted on a guide pulley holder (9), two corner pulleys (4) mounted on the base plate, and a belt, wherein the two y-motors (1) disposed above and the two corner pulleys (4) disposed below are distributed at four corners outside the two guide rails (6), the four guide pulleys (3) disposed in the middle are distributed at upper and lower sides of two ends of the guide pulley holder (9), and the x-moving device is located between the guide pulleys (3) at 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 opening (14) formed in the x-direction moving device, and the y-direction motors (1) are matched and connected with the belt to form driving force; the driving belt pulls the guide rail pulley (3) to drive the guide rail pulley support (9) to carry out reciprocating movement in the y direction along the guide rail (6) through the positive and negative rotation of the two y-direction motors (1) rotating in opposite directions.

5. The auxiliary in-line heating apparatus for a 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 gear is engaged with teeth arranged on one surface of the toothed belt, and the heating source (16) is reciprocated in the y direction by forward and reverse rotation of the two y-direction motors (1) with opposite rotation directions.

6. 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 both provided with a belt chute (11), the belt chute (11) is a belt groove with teeth, and a 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 a y-direction motor (1) and a corner pulley (4).

7. The auxiliary in-line heating device of the fused deposition additive manufacturing system according to claim 1, wherein the x-direction moving device comprises an x-direction motor casing (2), an x-direction motor chute (12) and an x-direction motor (13), the x-direction motor (13) is fixed inside the x-direction motor casing (2), a motor shaft of the x-direction motor is connected with an x-direction gear, the front end of the x-direction motor casing (2) is provided with an x-direction motor casing cover (15), and the 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 a toothed belt of the y-direction moving device to penetrate 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 guide rail pulley support (9) of the y-direction moving device in a matching way; an x-direction gear connected to an x-direction motor (13) is meshed with teeth arranged on the other surface of the toothed belt to form a driving force, and the x-direction moving device is driven to drive a heating source (16) to reciprocate along the guide rail pulley support (9).

8. The auxiliary in-line heating device of the fused deposition additive manufacturing system according to claim 7, wherein a rotating pair is arranged between two ends of the heating source (16) and the x-direction motor casing cover (15), so that the heating source (16) and the printing layer form an acute angle, and the heating efficiency is ensured; the x is to motor case lid (15) for detachable construction, with x to carrying out the dismantlement between motor case (2) and be connected, be convenient for inspect or repair inside x to motor (13).

9. An auxiliary in-line heating method of an auxiliary in-line heating apparatus of a fused deposition additive manufacturing system according to any one of claims 1 to 8, comprising the steps of:

the method comprises the following steps that firstly, four auxiliary online heating devices of the fused deposition additive manufacturing system are vertically arranged, the four auxiliary online heating devices with the same structure are vertically arranged and connected to form a closed four-side cavity, and the fused deposition additive manufacturing system is arranged inside the auxiliary online heating devices; setting the printing directions of the fused deposition additive manufacturing system as X, y and Z, wherein the X and y directions form a printing plane and are parallel to the material substrate, and the Z direction is a material stacking direction and is vertical to the material substrate; setting global coordinate systems of the four auxiliary online heating devices after combination as alpha, beta and gamma, setting alpha and beta directions as X and gamma directions corresponding to the printing direction of the fused deposition additive manufacturing system in a plane, and setting the gamma direction as a Z direction corresponding to the printing direction of the fused deposition additive manufacturing system in a space;

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 plane printing on the current layer, the y-direction motor (1) of the auxiliary online heating device does not work, the x-direction motor (13) receives signals, and the x-direction gear is meshed with the toothed belt, so that the relative movement of the gear and the rack is equivalent to the movement of the gear and the rack in the same direction as the printing direction;

fourthly, 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 plane 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 with the y-direction gears rotate anticlockwise and clockwise, and a corner pulley (4) on the same side with the y-direction gears rotate clockwise and anticlockwise to drive a guide rail (6) to move in the y direction;

and step five, the motion is transmitted with a bidirectional toothed belt through a gear.