Automatic calibration device for 3D printer, and 3D printer

Abstract

The present application provides an automatic calibration device for a 3D printer, and a 3D printer. The automatic calibration device comprises an assisted positioning member, a measuring assembly, and a circuit board. The assisted positioning member is used for generating a force when being touched and transmitting the force. The measuring assembly comprises a deformation body and a sensor, the deformation body is connected to the assisted positioning member to receive the force transmitted by the assisted positioning member so as to deform, and the sensor is configured to detect the deformation of the deformation body in a first direction, a second direction, and a third direction, the first direction, the second direction, and the third direction being perpendicular to each other. The circuit board is used for acquiring information sensed by the sensor, and determining the coordinate position of a nozzle on the basis of the received information, so as to calibrate and position the nozzle, thus improving printing quality.

Description

Automatic calibration device for 3D printer and 3D printer Technical Field

[0001] The present application relates to the field of 3D printing technology, and in particular to an automatic calibration device for a 3D printer and a 3D printer. Background Art

[0002] As 3D printing becomes increasingly widely used, users are demanding higher levels of print quality. Multi-nozzle printers can significantly improve printing efficiency and print versatility. However, for multi-nozzle printers, which switch nozzles vertically, the positioning and calibration of the nozzles are crucial to print quality. Currently, most printers on the market lack automatic calibration and positioning of the nozzles, leading to a decline in print quality after extended use.

[0003] Summary of the Invention

[0004] The present application provides an automatic calibration device for a 3D printer and a 3D printer. The device can cause a deformation body in a measuring component to deform in three-dimensional space by contacting an auxiliary positioning member with a nozzle, and detect the deformation amount of the deformation body in three-dimensional space by a sensor. The circuit board obtains the sensing information of the sensor to measure the actual coordinate position of the nozzle. The actual coordinate position of the nozzle can be used to calibrate the coordinates in the three-dimensional printing system to solve the automatic calibration and positioning problems of the nozzle in the above-mentioned technical problems and improve the printing quality.

[0005] The embodiment of the present application is implemented as follows:

[0006] An automatic calibration device for a 3D printer includes an auxiliary positioning member, a measuring assembly, and a circuit board. The auxiliary positioning member is configured to generate and transmit force when touched. The measuring assembly includes a deformable body and a sensor. The deformable body is connected to the auxiliary positioning member to receive the force transmitted by the auxiliary positioning member and deform. The sensor is configured to detect deformation of the deformable body in a first direction, a second direction, and a third direction; the first direction, the second direction, and the third direction are mutually perpendicular. The circuit board is configured to obtain sensing information from the sensor.

[0007] In one possible embodiment: the sensor includes at least a first sensor, the measuring component further includes a displacement component connected to the first sensor, the displacement component controls the movement of the first sensor to detect the deformation of the deformable body in the first direction, the second direction, and the third direction; and / or, the sensor includes at least a first sensor and a second sensor, the measuring component further includes a displacement component connected to the sensors, the first sensor is used to detect the deformation of the deformable body in the first direction, and the displacement component controls the movement of the second sensor to detect the deformation of the deformable body in the second direction and the third direction.

[0008] In one possible embodiment: the sensor includes at least a first sensor, a second sensor and a third sensor; the first sensor is arranged on the side of the deformable body in the first direction, and is used to detect the deformation amount of the deformable body in the first direction; the second sensor is arranged on the side of the deformable body in the second direction, and is used to detect the deformation amount of the deformable body in the second direction; the third sensor is arranged on the side of the deformable body in the third direction, and is used to detect the deformation amount of the deformable body in the third direction.

[0009] In one possible embodiment, the deformable body includes a first portion, a second portion, and a third portion, the second portion being connected between the first portion and the third portion, and the first portion being connected to the auxiliary positioning member at one end away from the second portion. Along the first direction, the first sensor is disposed on at least one side of the first portion; along the second direction, the second sensor is disposed on at least one side of the second portion; and along the third direction, the third sensor is disposed on at least one side of the third portion.

[0010] In a possible embodiment: the automatic calibration device also includes a base, the auxiliary positioning member, the measuring component and the circuit board are arranged on the base, the auxiliary positioning member is configured to form an accommodating space between the auxiliary positioning member and the base, and the measuring component and the circuit board are arranged in the accommodating space.

[0011] In one possible embodiment, the auxiliary positioning member includes a top wall and side walls, the side walls being disposed around the top wall, the accommodating space being formed between the top wall, the side walls, and the base, a first protrusion being provided on a side of the top wall facing the deformable body, the first protrusion being connected to one end of the deformable body, and a second protrusion being provided on the base, the second protrusion being connected to the other end of the deformable body.

[0012] In a possible embodiment: the deformable body includes a first connecting portion and a second connecting portion, the first connecting portion is arranged corresponding to the first protrusion, connecting one end of the deformable body and the first protrusion, and the second connecting portion is arranged corresponding to the second protrusion, connecting the other end of the deformable body and the base.

[0013] In a possible embodiment: a limiting portion is provided on the base, the limiting portion is located on the outer peripheral side of the circuit board, and is protruded on the side of the base facing the auxiliary positioning member, the side wall of the auxiliary positioning member is located on the outside of the limiting portion, and the limiting portion is used to resist the side wall.

[0014] In a possible implementation, the automatic calibration device includes a fixing member, and the fixing member is configured to connect the automatic calibration device and a 3D printer, so as to install the automatic calibration device on the 3D printer.

[0015] In a possible implementation manner, the fixing member includes a magnetic member.

[0016] In one possible embodiment, a wire outlet hole is provided on the base for passing cables. The automatic calibration device includes a wire pressing plate. A receiving groove is provided on the side of the base facing away from the auxiliary positioning member. The receiving groove includes a first receiving groove and a second receiving groove. The first receiving groove is used to receive cables. One end of the first receiving groove is connected to the wire outlet hole, and the other end of the first receiving groove passes through the side wall of the base. The second receiving groove is provided on opposite sides of the first receiving groove and is connected to the first receiving groove. The wire pressing plate partially covers the first receiving groove, and both ends of the wire pressing plate are provided in the second receiving groove.

[0017] The present application also provides a 3D printer, comprising a nozzle assembly, a printing platform, a moving assembly and the automatic calibration device described in the above embodiment, wherein the moving assembly is used to drive the nozzle assembly to move, and the automatic calibration device is detachably mounted on the printing platform for automatically calibrating the nozzle assembly.

[0018] The automatic calibration device and 3D printer of the present application can cause the deformation body to deform in three-dimensional space by having the nozzle touch the auxiliary positioning part, determine the coordinate position of the nozzle according to the measured deformation amounts in different directions, and then calibrate and position the nozzle. The operation process is simple and convenient, which is conducive to improving printing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0020] FIG1 is a schematic structural diagram of an automatic calibration device for a 3D printer according to an embodiment of the present application.

[0021] FIG. 2 is a schematic diagram of the exploded structure of the automatic calibration device in FIG. 1 .

[0022] FIG3 is a schematic diagram of the exploded structure of the automatic calibration device in FIG1 in another direction.

[0023] FIG4 is a schematic structural diagram of the automatic calibration device shown in FIG1 with the auxiliary positioning member removed.

[0024] FIG5 is a schematic structural diagram of the structure shown in FIG4 in another direction.

[0025] FIG6 is a schematic cross-sectional view of the automatic calibration device shown in FIG1 .

[0026] FIG7 is another schematic cross-sectional view of the automatic calibration device shown in FIG1 .

[0027] FIG8 is a schematic structural diagram of the automatic calibration device shown in FIG1 in another direction.

[0028] FIG9 is a schematic structural diagram of a 3D printer in one embodiment.

[0029] FIG10 is an enlarged view of the local structure of the 3D printer shown in FIG9 at position X. FIG.

[0030] Description of main component symbols:

[0031] Automatic calibration device 100

[0032] Auxiliary positioning piece 10

[0033] Top wall 11

[0034] Side wall 12

[0035] First bump 13

[0036] First fastener 14

[0037] Measuring component 20

[0038] Deformation 21

[0039] Part 1 211

[0040] Part 2212

[0041] Part III 213

[0042] First connection portion 214

[0043] Second connection portion 215

[0044] First sensor 22

[0045] Second sensor 23

[0046] The third sensor 24

[0047] Hollow hole 25

[0048] Circuit board 30

[0049] First through hole 31

[0050] Second through hole 32

[0051] Base 40

[0052] Second bump 41

[0053] Second fastener 42

[0054] Limiting portion 43

[0055] Depression 44

[0056] Wire outlet hole 45

[0057] Receiving slot 46

[0058] First receiving groove 461

[0059] Second receiving slot 462

[0060] Fixing member 50

[0061] Wire pressing plate 60

[0062] 3D printer 200

[0063] Nozzle assembly 201

[0064] First nozzle 2011

[0065] Second nozzle 2012

[0066] Printing platform 202

[0067] Mobile Component 203 DETAILED DESCRIPTION

[0068] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0069] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may also be an element centered therein. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may also be an element centered therein. When an element is considered to be "set on" another element, it may be directly set on the other element or there may also be an element centered therein. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0070] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "or / and" as used herein includes any and all combinations of one or more of the relevant listed items.

[0071] Some embodiments of the present application are described in detail. In the absence of conflict, the following embodiments and features of the embodiments can be combined with each other.

[0072] Referring to Figures 1 to 7, this embodiment provides an automatic calibration device 100 for a 3D printer 200, comprising an auxiliary positioning member 10, a measuring assembly 20, and a circuit board 30. The auxiliary positioning member 10 is configured to generate and transmit force when touched, for example, transmitting the force generated when the printhead contacts the auxiliary positioning member 10 during printhead automatic calibration. The measuring assembly 20 includes a deformable member 21 and a sensor. The deformable member 21 is connected to the auxiliary positioning member 10 to receive the force transmitted by the auxiliary positioning member 10 and deform. The sensor is configured to detect deformation of the deformable member 21 in a first direction, a second direction, and a third direction, wherein the first direction, the second direction, and the third direction are mutually perpendicular. The circuit board 30 is configured to acquire sensing information from the sensor to measure the actual coordinate position of the printhead. The actual coordinate position of the printhead can be used to calibrate the coordinates in the 3D printing system, thereby resolving issues related to automatic printhead calibration and positioning and improving print quality. In the figure, arrow A indicates the first direction, arrow B indicates the second direction, and arrow C indicates the third direction. The directions of the arrows in the diagram are only examples. The first direction, the second direction and the third direction may also be opposite directions of the directions of the arrows in the diagram or other directions. The present application is not limited thereto.

[0073] In one embodiment of the present application, the sensor includes at least a first sensor 22, and the measuring component 20 further includes a displacement component (not shown) connected to the first sensor 22, wherein the displacement component controls the movement of the first sensor 22 to detect the deformation of the deformable body 21 in the first direction, the second direction, and the third direction. Specifically, the first sensor 22 includes but is not limited to a photoelectric sensor, a pressure sensor, etc., and the displacement component includes but is not limited to a driving structure such as a drive motor, a drive cylinder, and a drive guide rail, which can drive the first sensor 22 to move relative to the deformable body 21 in the first direction, the second direction, or the third direction. During the movement of the first sensor 22, the signal emitted by the first sensor 22 is blocked by different parts of the deformable body 21, or the first sensor 22 touches different parts of the deformable body 21, thereby feeding back a corresponding detection signal, and judging the deformation amount of the deformable body 21 in the first direction, the second direction, and the third direction based on the feedback signal.

[0074] In another embodiment of the present application, the sensor includes at least a first sensor 22 and a second sensor 23, and the measuring component 20 also includes a displacement component (not shown) connected to the sensor. The first sensor 22 is used to detect the deformation of the deformable body 21 in the first direction, and the displacement component controls the movement of the second sensor 23 to detect the deformation of the deformable body 21 in the second direction and the third direction. Specifically, the first sensor 22 includes but is not limited to strain gauges, piezoelectric ceramics and other components that can detect regional deformation and stress changes. The first sensor 22 can be fixedly set on the surface of the deformable body 21. When the deformable body 21 is deformed in the first direction, the first sensor 22 can be deformed synchronously with the deformable body 21 and generate a corresponding detection signal, thereby determining the deformation amount of the deformable body 21 in the first direction. The second sensor 23 includes but is not limited to a photoelectric sensor, a pressure sensor, etc. When the displacement component drives the second sensor 23 to move in the second direction or the third direction, the signal emitted by the second sensor 23 is blocked by different parts of the deformable body 21, or the second sensor 23 touches different parts of the deformable body 21, thereby feeding back a corresponding detection signal, and judging the deformation amount of the deformable body 21 in the second direction and the third direction based on the feedback signal.

[0075] In one embodiment of the present application, as shown in FIG2 , the sensor includes at least a first sensor 22, a second sensor 23, and a third sensor 24. The first sensor 22 is disposed on a side of the deformable body 21 in a first direction and is configured to detect the deformation of the deformable body 21 in the first direction. The second sensor 23 is disposed on a side of the deformable body 21 in a second direction and is configured to detect the deformation of the deformable body 21 in the second direction. The third sensor 24 is disposed on a side of the deformable body 21 in a third direction and is configured to detect the deformation of the deformable body 21 in the third direction.

[0076] The auxiliary positioning member 10 also includes a base 40. Along the third direction, the auxiliary positioning member 10 and the base 40 are positioned opposite each other. The auxiliary positioning member 10, the measuring assembly 20, and the circuit board 30 are disposed on the base 40. The auxiliary positioning member is configured to form a housing space with the base 40. The measuring assembly 20 and the circuit board 30 are disposed within the housing space. One end of the deformable element 21 is connected to the auxiliary positioning member 10, and the other end is connected to the base 40, such that the main portion of the deformable element 21 is suspended between the auxiliary positioning member 10 and the base 40. When the printhead contacts the auxiliary positioning member 10, the deformable element 21 receives the force transmitted by the auxiliary positioning member 10, causing the deformable element 21 to deform spatially under the action of the force. The circuit board 30 is disposed on the base 40 and is configured to receive deformation information transmitted by the first sensor 22, the second sensor 23, and the third sensor 24, and to determine the coordinate position of the printhead based on the received information. The circuit board 30 can also determine the displacement deviation of the nozzle based on the measured nozzle coordinate position and transmit the displacement deviation to the three-dimensional printing system, or the circuit board 30 directly transmits the measured nozzle coordinate position to the three-dimensional printing system, and the three-dimensional printing system determines the displacement deviation of the nozzle to calibrate the coordinate system in the three-dimensional printing system and realize automatic calibration of the nozzle.

[0077] Referring to Figures 2 to 5 , in one embodiment of the present application, the deformable member 21 includes a first portion 211, a second portion 212, and a third portion 213. The second portion 212 is connected between the first portion 211 and the third portion 213. The end of the first portion 211 away from the second portion 212 is connected to the auxiliary positioning member 10, and the end of the third portion 213 away from the second portion 212 is connected to the base 40.

[0078] Along the first direction, the first sensor 22 is disposed on at least one side of the first portion 211. In one embodiment of the present application, the first sensor 22 is disposed on opposite sides of the first portion 211 to detect the deformation amount of the first portion 211 in the first direction or the reverse direction of the first direction. Along the second direction, the second sensor 23 is disposed on at least one side of the second portion 212. In one embodiment of the present application, the second sensor 23 is disposed on opposite sides of the second portion 212 to detect the deformation amount of the second portion 212 in the second direction or the reverse direction of the second direction. Along the third direction, the third sensor 24 is disposed on at least one side of the third portion 213.

[0079] In an embodiment of the present application, the third direction is perpendicular to the base 40. When the nozzle touches the auxiliary positioning member 10, the deformation of the deformable body 21 in the third direction usually occurs towards the base 40. Therefore, disposing the third sensor 24 on one side of the third portion 213 can fully detect the deformation amount of the deformable body 21 in the third direction. The first sensor 22, the second sensor 23, and the third sensor 24 include, but are not limited to, components such as strain gauges and piezoelectric ceramics that can detect regional deformation and stress changes. The first sensor 22, the second sensor 23, and the third sensor 24 are all communicatively connected to the circuit board 30 to transmit detection signals to the circuit board 30.

[0080] In one embodiment of the present application, along the third direction, the third sensor 24 is further disposed on the other side of the third portion 213. That is to say, along the third direction, the third sensor 24 can also be disposed on opposite sides of the third portion 213 to improve the detection accuracy.

[0081] In an embodiment of the present application, the first portion 211, the second portion 212, and the third portion 213 are at the same horizontal position. The first portion 211 and the third portion 213 are disposed substantially along the second direction, the second portion 212 is disposed substantially along the first direction, and the first portion 211 and the third portion 213 are located on the same side of the second portion 212, so that the deformable body 21 is substantially in a "U" - shaped structure. In this way, the sensitivity of the deformable body 21 can be improved, so that when the deformable body 21 is stressed, it can quickly generate a relatively obvious deformation in the three - dimensional space, facilitating the sensor to accurately detect the deformation amounts in different directions. It can be understood that in other embodiments, the deformable body 21 can also be other shapes, such as a Z - shape, an arch - shape, etc., and the present application does not limit this.

[0082] As shown in FIG. 4, in the embodiment of the present application, hollow holes 25 are provided on the first part 211, the second part 212, and the third part 213, which is beneficial to reducing the weight of the deformable body 21 and improving the sensitivity of the deformable body 21.

[0083] Please refer to FIGS. 2, FIG. 3 and FIG. 4. In one embodiment of the present application, the deformable body 21 further includes a first connecting portion 214 and a second connecting portion 215. The first connecting portion 214 is provided at one end of the first part 211 away from the second part 212, and the first connecting portion 214 protrudes toward the third part 213. The second connecting portion 215 is provided at one end of the third part 213 away from the second part 212, and the second connecting portion 215 protrudes toward the first part 211. The first connecting portion 214 is used to connect the first part 211 and the auxiliary positioning member 10. The second connecting portion 215 is used to connect the third part 213 and the base 40. The first connecting portion 214 and the second connecting portion 215 are generally located in the opening area of the "冂" - shaped structure, so that the parts of the deformable body 21 fixed to the auxiliary positioning member 10 and the base 40 are generally on the same side of the deformable body 21. When the deformable body 21 is stressed, the fixed positions will not disperse the stress of the deformable body 21, enabling the sensor to fully detect the deformation amount of the deformable body 21 in all directions.

[0084] As shown in FIGS. 3 and FIG. 6, the auxiliary positioning member 10 includes a top wall 11 and a side wall 12. The side wall 12 is arranged around the top wall 11 to form the inner cavity of the auxiliary positioning member 10, making the auxiliary positioning member 10 generally a housing structure. The auxiliary positioning member 10 is covered on the base 40, and the accommodating space is formed between the top wall 11, the side wall 12 and the base 40. A first convex block 13 is provided on the side of the top wall 11 facing the deformable body 21, and the first convex block 13 is arranged corresponding to the first connecting portion 214. The first convex block 13 and the first connecting portion 214 are connected by a first fastener 14. The first fastener 14 includes, but is not limited to, parts such as screws and pins. After the assembly of the auxiliary positioning member 10, the deformable body 21 and the base 40, in the resting state, there is a gap between the side wall 12 of the auxiliary positioning member 10 and the base 40. When the nozzle touches the top wall 11 of the auxiliary positioning member 10, the auxiliary positioning member 10 can move toward the base 40, and the deformable body 21 also deforms accordingly, which is convenient for detecting the deformation amount of the deformable body 21 in the third direction, so as to judge the coordinates of the nozzle in the third direction.

[0085] As shown in FIGS. 2 and FIG. 7, a second convex block 41 is provided on the base 40, and the second convex block 41 is arranged corresponding to the second connecting portion 215. The second convex block 41 and the second connecting portion 215 are connected by a second fastener 42. The second fastener 42 includes, but is not limited to, parts such as screws and pins.

[0086] The circuit board 30 is provided with a first through hole 31 and a second through hole 32. The first through hole 31 is used to avoid the external cables of the circuit board 30, and the base 40 is provided with a wire outlet hole 45 corresponding to the first through hole 31, so as to facilitate the connection of external devices to the circuit board 30 through cables. When the circuit board 30 is assembled to the base 40, the second protrusion 41 passes through the second through hole 32, which can serve to locate the installation position of the circuit board 30 on the base 40. In an embodiment of the present application, the second protrusion 41 and the second through hole 32 are mutually matching elliptical shapes, which are conducive to reducing the rotation or shaking of the circuit board 30 on the base 40. In other embodiments, the second protrusion 41 and the second through hole 32 can also be rectangular, triangular, polygonal, etc., which is not limited in the present application.

[0087] Furthermore, the base 40 is provided with a limiting portion 43, which is located on the outer periphery of the circuit board 30 and protrudes from the surface of the base 40. The sidewall 12 of the auxiliary positioning member 10 is located outside the limiting portion 43, and the limiting portion 43 is used to resist the sidewall 12 to limit the displacement range of the auxiliary positioning member 10 in the first direction and the second direction. In the embodiment of the present application, the limiting portion 43 is an annular protrusion. In other embodiments, the limiting portion 43 can also be a plurality of spaced-apart protrusions, and the present application is not limited to this.

[0088] Referring to Figures 3 and 8, the automatic calibration device 100 also includes a fixing member 50, which is configured to connect the automatic calibration device 100 and the 3D printer 200, and install the automatic calibration device 100 on the 3D printer 200. In one embodiment of the present application, the fixing member 50 is provided on the side of the base 40 away from the auxiliary positioning member 10, and is used to install the automatic calibration device 100 in the 3D printer 200, so as to achieve automatic calibration and positioning of the nozzle without disassembling the 3D printer 200. In an embodiment of the present application, a recessed portion 44 is provided on the side of the base 40 away from the auxiliary positioning member, and the fixing member 50 is provided in the recessed portion 44, and the lower surface of the fixing member 50 does not protrude from the lower surface of the base 40, so that the automatic calibration device 100 can be stably installed on the printing platform 202 of the 3D printer 200, thereby improving the calibration accuracy. The fixing member 50 includes a magnetic member, which is used to mount the automatic calibration device 100 in the 3D printer 200. This makes the installation process simple and convenient, and also facilitates adjustment of the installation position. In other embodiments, the fixing member 50 may also include a suction cup, an adhesive, etc., which is not limited in this application.

[0089] In one embodiment of the present application, the automatic calibration device 100 includes a wire pressing plate 60. A receiving groove 46 is further provided on the side of the base 40 facing away from the auxiliary positioning member 10. The receiving groove 46 includes a first receiving groove 461 and a second receiving groove 462. One end of the first receiving groove 461 communicates with the wire outlet 45, and the other end extends through the side wall 12 of the base 40. The first receiving groove 461 is used to accommodate cables to prevent them from affecting the installation stability of the base 40 on the 3D printer 200. The second receiving groove 462 is provided on opposite sides of the first receiving groove 461 and communicates with the first receiving groove 461. The wire pressing plate 60 partially covers the first receiving groove 461, with both ends of the wire pressing plate 60 located in the second receiving groove 462. The wire pressing plate 60 is secured to the base 40 using fasteners such as screws to confine the cables within the first receiving groove 461. The bottom surface of the wire pressing plate 60 does not protrude from the bottom surface of the base 40.

[0090] Please refer to Figures 9 and 10. The implementation of this application also provides a 3D printer 200, including a nozzle assembly 201, a printing platform 202, a moving assembly 203 and the automatic calibration device 100 described in the above embodiment. The moving assembly 203 is used to drive the nozzle assembly 201 to move. The automatic calibration device 100 is detachably mounted on the printing platform 202, and the printing platform 202 can drive the automatic calibration device 100 to move toward the nozzle assembly 201, so that the nozzle in the nozzle assembly 201 touches the automatic calibration device 100, thereby measuring the actual coordinate position of the nozzle, and automatically calibrating and positioning the nozzle according to the measurement results. Before the calibration process begins, the automatic calibration device 100 can be installed at any position of the printing platform 202 to facilitate the calibration of the nozzle assembly 201.

[0091] Furthermore, the nozzle assembly 201 includes a first nozzle 2011 and a second nozzle 2012. In the embodiment of the present application, the first nozzle 2011 can be a movable nozzle, and the second nozzle 2012 can be a fixed nozzle. The calibration process of the first nozzle 2011 and the second nozzle 2012 will be described below.

[0092] After the automatic calibration device 100 is installed on the printing platform 202, its position remains fixed. The automatic calibration device 100 can be connected to the 3D printer 200 for communication, or connected to an external control device for communication. The printing platform 202 drives the automatic calibration platform to move up and down, and the moving component 203 drives the nozzle assembly 201 to move horizontally. First, the first nozzle 2011 is allowed to contact different positions of the top wall 11 of the auxiliary positioning member 10, and then the first nozzle 2011 is allowed to contact different positions of the side wall 12 of the auxiliary positioning member 10. The actual coordinate position of the first nozzle 2011 at different positions is determined based on the deformation amount in the three-dimensional space generated by the deformation body 21 when the nozzle contacts different positions. The offset of the first nozzle 2011 is calculated based on the actual coordinate position. The 3D printer 200 can automatically calibrate and position the first nozzle 2011 based on the offset. After adjusting the relative positions of the first nozzle 2011 and the second nozzle 2012, the second nozzle 2012 can be driven to contact the auxiliary positioning part 10 of the automatic calibration device 100 through the moving component 203 and the printing platform 202, and the second nozzle 2012 can be automatically calibrated in a similar manner, which will not be repeated here.

[0093] The above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit the present application. Although the present application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that modifications or equivalent replacements of the technical solutions of the present application should not depart from the spirit and scope of the technical solutions of the present application.

Claims

1. An automatic calibration device for a 3D printer, characterized in that: include: Auxiliary positioning parts, used to generate and transmit force when touched; A measuring component, comprising a deformable body and a sensor, wherein the deformable body is connected to the auxiliary positioning member to receive the force transmitted by the auxiliary positioning member and generate deformation, and the sensor is configured to detect the deformation of the deformable body in a first direction, a second direction and a third direction; wherein the first direction, the second direction and the third direction are perpendicular to each other; The circuit board is used to obtain the sensing information of the sensor.

2. The automatic calibration device for a 3D printer according to claim 1, characterized in that: The sensor includes at least a first sensor, and the measuring component also includes a displacement component connected to the first sensor, and the displacement component controls the movement of the first sensor to detect the deformation of the deformable body in the first direction, the second direction and the third direction; And / or, the sensor includes at least a first sensor and a second sensor, the measuring component also includes a displacement component connected to the sensors, the first sensor is used to detect the deformation of the deformable body in the first direction, and the displacement component controls the movement of the second sensor to detect the deformation of the deformable body in the second direction and the third direction.

3. The automatic calibration device for a 3D printer according to claim 1, characterized in that: The sensor comprises at least a first sensor, a second sensor and a third sensor, wherein the first sensor is arranged on the side of the deformable body in the first direction and is used to detect the deformation amount of the deformable body in the first direction; The second sensor is arranged on the side of the deformable body in the second direction, and is used to detect the deformation amount of the deformable body in the second direction; the third sensor is arranged on the side of the deformable body in the third direction, and is used to detect the deformation amount of the deformable body in the third direction.

4. The automatic calibration device for a 3D printer according to claim 1 or 3, characterized in that: It also includes a base, the auxiliary positioning member, the measuring component and the circuit board are arranged on the base, the auxiliary positioning member is configured to form an accommodating space with the base, and the measuring component and the circuit board are arranged in the accommodating space.

5. The automatic calibration device for a 3D printer according to claim 4, characterized in that: The auxiliary positioning member includes a top wall and a side wall, the side wall is arranged around the top wall, the accommodating space is formed between the top wall, the side wall and the base, and the top wall faces one side of the deformable body. A first protrusion is provided on the side, and the first protrusion is connected to one end of the deformation body; The base is provided with a second protrusion, and the second protrusion is connected to the other end of the deformable body.

6. The automatic calibration device for a 3D printer according to claim 5, characterized in that: The deformable body includes a first connecting portion and a second connecting portion, wherein the first connecting portion is arranged corresponding to the first protrusion and connects one end of the deformable body with the first protrusion, and the second connecting portion is arranged corresponding to the second protrusion and connects the other end of the deformable body with the base.

7. The automatic calibration device for a 3D printer according to claim 5, characterized in that: The base is provided with a limiting portion, which is located on the outer peripheral side of the circuit board and protrudes from the side of the base facing the auxiliary positioning member. The side wall of the auxiliary positioning member is located on the outer side of the limiting portion, and the limiting portion is used to resist the side wall.

8. The automatic calibration device for a 3D printer according to claim 1, characterized in that: The automatic calibration device includes a fixing member, and the fixing member is configured to connect the automatic calibration device and a 3D printer, so as to install the automatic calibration device on the 3D printer.

9. The automatic calibration device for a 3D printer according to claim 8, characterized in that: The fixing member includes a magnetic member.

10. A 3D printer, characterized in that: It comprises a nozzle assembly, a printing platform, a moving assembly and the automatic calibration device according to any one of claims 1 to 9, wherein the moving assembly is used to drive the nozzle assembly to move, and the automatic calibration device is detachably mounted on the printing platform for automatically calibrating the nozzle assembly.

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