CN220297870U - Automatic calibration device for 3D printer and 3D printer - Google Patents

Abstract

The application provides an automatic calibration device for a 3D printer and the 3D printer. The automatic calibration device comprises an auxiliary positioning piece, a measurement assembly and a circuit board. The auxiliary positioning piece is used for generating force and transmitting when being touched. The measuring assembly comprises a deformation body and a sensor, wherein the deformation body is connected with the auxiliary positioning piece so as to receive the force transmitted by the auxiliary positioning piece and generate deformation, and the sensor is configured to detect the deformation of the deformation body in a first direction, a second direction and a third direction, and the first direction, the second direction and the third direction are perpendicular to each other. The circuit board is used for acquiring the sensing information of the sensor, judging the coordinate position of the spray head according to the received information, calibrating and positioning the spray head, and improving the printing quality.

Description

Automatic calibration device for 3D printer and 3D printer

Technical Field

The application relates to the technical field of 3D printing, in particular to an automatic calibration device for a 3D printer and the 3D printer.

Background

With the wider application of 3D printing, the multi-nozzle printer has more requirements on printing quality, and can greatly improve printing efficiency and printing diversity. However, for a multi-head printer with a vertically movable switching head, positioning and calibration of the multi-head have a critical effect on printing quality, and most of printing machines on the market cannot perform automatic calibration and positioning of the multi-head at present, and after long-term use, there is a problem that printing quality is reduced.

Disclosure of Invention

The application provides an automatic calibration device and 3D printer for 3D printer can contact auxiliary positioning spare through the shower nozzle, makes deformation body in the measurement assembly produce the deformation in the space to detect deformation volume of deformation body in the space through the sensor, the circuit board obtains the response information of sensor in order to measure the actual coordinate position of shower nozzle, and the actual coordinate position of shower nozzle can be used to calibrate the coordinate in the three-dimensional printing system, in order to solve the automatic calibration and the location problem of shower nozzle among the above-mentioned technical problem, improves print quality.

Embodiments of the present application are implemented as follows:

an automatic calibration device for a 3D printer comprises an auxiliary positioning piece, a measuring assembly and a circuit board. The auxiliary positioning piece is used for generating force and transmitting when being touched. The measuring assembly comprises a deformation body and a sensor, wherein the deformation body is connected with the auxiliary positioning piece to receive the force transmitted by the auxiliary positioning piece and generate deformation, and the sensor is configured to detect the deformation of the deformation 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 for acquiring the induction information of the sensor.

In one possible embodiment: the sensor at least comprises a first sensor, the measuring assembly further comprises a displacement assembly connected with the first sensor, and the displacement assembly controls the first sensor to move so as to detect deformation of the deformation body in a first direction, a second direction and a third direction; and/or, the sensor at least comprises a first sensor and a second sensor, the measuring assembly further comprises a displacement assembly connected with the sensor, the first sensor is used for detecting deformation of the deformation body in the first direction, and the displacement assembly controls the second sensor to move so as to detect deformation of the deformation body in the second direction and the third direction.

In one possible embodiment: the sensor at least comprises a first sensor, a second sensor and a third sensor; the first sensor is arranged on the side edge of the deformation body in the first direction and is used for detecting the deformation amount of the deformation body in the first direction; the second sensor is arranged on the side edge of the deformation body in the second direction and is used for detecting the deformation quantity of the deformation body in the second direction; the third sensor is arranged on the side edge of the deformation body in the third direction and used for detecting the deformation quantity of the deformation body in the third direction.

In one possible embodiment: the deformation body comprises a first part, a second part and a third part, wherein the second part is connected between the first part and the third part, and one end, far away from the second part, of the first part is connected with the auxiliary positioning piece. The first sensor is arranged on at least one side of the first part along the first direction; the second sensor is arranged on at least one side of the second part along the second direction; along the third direction, the third sensor is disposed on at least one side of the third portion.

In one possible embodiment: the automatic calibration device further comprises a base, the auxiliary positioning piece, the measuring component and the circuit board are arranged on the base, the auxiliary positioning piece is configured to form a containing space with the base, and the measuring component and the circuit board are arranged in the containing space.

In one possible embodiment: the auxiliary positioning piece comprises a top wall and a side wall, the side wall surrounds the top wall, the accommodating space is formed between the top wall and the base, a first lug is arranged on one side of the top wall, facing the deformation body, of the top wall, and the first lug is connected with one end of the deformation body. The base is provided with a second bump, and the second bump is connected with the other end of the deformation body.

In one possible embodiment: the deformation body comprises a first connecting part and a second connecting part, wherein the first connecting part is correspondingly arranged with the first convex block and is used for connecting one end of the deformation body with the first convex block, and the second connecting part is correspondingly arranged with the second convex block and is used for connecting the other end of the deformation body with the base.

In one possible embodiment: the base is provided with a limiting part, the limiting part is positioned on the outer peripheral side of the circuit board and is convexly arranged on one side of the base facing the auxiliary positioning piece, the side wall of the auxiliary positioning piece is positioned on the outer side of the limiting part, and the limiting part is used for resisting the side wall.

In one possible embodiment: the auto-calibration device includes a fixture configured to connect the auto-calibration device and a 3D printer, mounting the auto-calibration device to the 3D printer.

In one possible embodiment: the fixing piece comprises a magnetic attraction piece.

In one possible embodiment: and the base is provided with a wire outlet hole for the cable to pass through. The automatic calibration device comprises a line pressing plate, one side of the base, which is away from the auxiliary positioning piece, is provided with a containing groove, the containing groove comprises a first containing groove and a second containing groove, the first containing groove is used for containing a cable, one end of the first containing groove is communicated with the line outlet hole, and the other end of the first containing groove penetrates through the side wall of the base; the second accommodating grooves are arranged on two opposite sides of the first accommodating groove and are communicated with the first accommodating groove, the line pressing plate covers part of the first accommodating groove, and two ends of the line pressing plate are arranged in the second accommodating groove.

The application still provides a 3D printer, including shower nozzle subassembly, print platform, remove subassembly and the automatic calibration device of above-mentioned embodiment, remove the subassembly and be used for driving the shower nozzle subassembly and remove, automatic calibration device detachably install in print platform, be used for right the shower nozzle subassembly carries out automatic calibration.

The automatic calibration device and the 3D printer of this application can make the deformation body produce the deformation in the three-dimensional space through shower nozzle touching auxiliary positioning spare, judge the coordinate position of shower nozzle according to the deformation volume of the different directions that measure, and then calibrate and fix a position the shower nozzle, and operation process is simple and convenient, is favorable to improving printing quality.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following description will briefly describe the drawings in the embodiments, it being understood that the following drawings only illustrate some embodiments of the present application and should not be considered as limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of an automatic calibration device for a 3D printer according to an embodiment of the present application.

Fig. 2 is an exploded view of the automatic calibration device of fig. 1.

Fig. 3 is an exploded view of the automatic calibration device of fig. 1 in another direction.

Fig. 4 is a schematic structural view of the automatic calibration device shown in fig. 1 after the auxiliary positioning member is removed.

Fig. 5 is a schematic view of the structure of fig. 4 in another direction.

Fig. 6 is a schematic cross-sectional view of the automatic calibration device shown in fig. 1.

FIG. 7 is a schematic cross-sectional view of the automatic calibration device shown in FIG. 1.

Fig. 8 is a schematic view of the automatic calibration device shown in fig. 1 in another direction.

Fig. 9 is a schematic structural diagram of a 3D printer in an embodiment.

Fig. 10 is a partial structure enlarged view of the 3D printer shown in fig. 9 at X.

Description of main reference numerals:

automatic calibration device 100

Auxiliary positioning member 10

Top wall 11

Side wall 12

First bump 13

First fastener 14

Measuring assembly 20

Variant 21

First portion 211

Second portion 212

Third portion 213

First connecting portion 214

Second connecting portion 215

First sensor 22

Second sensor 23

Third sensor 24

Hollowed-out hole 25

Circuit board 30

First through hole 31

Second through hole 32

Base 40

Second bump 41

Second fastening member 42

Limit part 43

Recess 44

Wire outlet hole 45

Receiving groove 46

First accommodating groove 461

Second receiving groove 462

Fixing member 50

Line ball board 60

3D printer 200

Spray head assembly 201

First spray head 2011

Second nozzle 2012

Printing platform 202

Moving assembly 203

Detailed Description

The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "or/and" as used herein includes any and all combinations of one or more of the associated listed items.

Some embodiments of the present application are described in detail. The following embodiments and features of the embodiments may be combined with each other without collision.

Referring to fig. 1 to 7, the present embodiment provides an automatic calibration device 100 for a 3D printer 200, including an auxiliary positioning member 10, a measuring assembly 20, and a circuit board 30. The auxiliary positioning member 10 is used for generating and transmitting force when being touched, such as force generated when the nozzle touches the auxiliary positioning member 10 during automatic alignment of the nozzle. The measuring assembly 20 comprises a deformation body 21 and a sensor, the deformation body 21 being connected to the auxiliary positioning element 10 to receive the force transmitted by the auxiliary positioning element 10 and to deform it. The sensor is configured to detect deformation of the deformation body 21 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 30 is used for acquiring sensing information of the sensor so as to measure the actual coordinate position of the spray head, and the actual coordinate position of the spray head can be used for calibrating coordinates in the three-dimensional printing system so as to solve the problems of automatic calibration and positioning of the spray head and improve the printing quality. In the figure, arrow a indicates a first direction, arrow B indicates a second direction, and arrow C indicates a third direction. The directions of arrows in the drawings are merely examples, and the first direction, the second direction, and the third direction may be directions opposite to the directions of the arrows in the drawings or other directions, and the present application is not limited thereto.

In one embodiment of the present application, the sensor includes at least a first sensor 22, and the measuring assembly 20 further includes a displacement assembly (not shown) connected to the first sensor 22, and the displacement assembly controls the first sensor 22 to move to detect the deformation of the deformation 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, and the like, and the displacement assembly includes, but is not limited to, a driving structure including a driving motor, a driving cylinder, a driving rail, and the like, and can drive the first sensor 22 to move relative to the deformation body 21 in a first direction, a second direction, or a third direction, and in the moving process of the first sensor 22, signals sent by the first sensor 22 are blocked by different parts of the deformation body 21, or the first sensor 22 touches different parts of the deformation body 21, so as to feed back corresponding detection signals, and determine deformation amounts of the deformation body 21 in the first direction, the second direction, and the third direction according to the feedback signals.

In another embodiment of the present application, the sensor includes at least a first sensor 22 and a second sensor 23, the measuring assembly 20 further includes a displacement assembly (not shown) connected to the sensor, the first sensor 22 is configured to detect the deformation of the deformation body 21 in the first direction, and the displacement assembly controls the second sensor 23 to move so as to detect the deformation of the deformation body 21 in the second direction and the third direction. Specifically, the first sensor 22 includes, but is not limited to, a strain gauge, a piezoelectric ceramic, or the like, which is capable of detecting a deformation of a region and a change in stress. The first sensor 22 may be fixedly disposed on the surface of the deformation body 21, and when the deformation body 21 deforms in the first direction, the first sensor 22 may synchronously deform along with the deformation body 21 and generate a corresponding detection signal, so as to determine the deformation amount of the deformation body 21 in the first direction. The second sensor 23 includes, but is not limited to, a photoelectric sensor, a pressure sensor, and the like, and the displacement component drives the second sensor 23 to move in the second direction or the third direction, where a signal sent by the second sensor 23 is blocked by different parts of the deformation body 21, or the second sensor 23 touches different parts of the deformation body 21, so as to feed back a corresponding detection signal, and determine deformation amounts of the deformation body 21 in the second direction and the third direction according to the feedback signal.

In one embodiment of the present application, as shown in fig. 2, the sensors include at least a first sensor 22, a second sensor 23, and a third sensor 24. The first sensor 22 is disposed at a side of the deformation body 21 in the first direction, and is configured to detect a deformation amount of the deformation body 21 in the first direction. The second sensor 23 is disposed at a side of the deformation body 21 in the second direction, and is configured to detect a deformation amount of the deformation body 21 in the second direction. The third sensor 24 is disposed at a side of the deformation body 21 in the third direction, and is configured to detect a deformation amount of the deformation body 21 in the third direction.

The auxiliary positioning member 10 further comprises a base 40. In the third direction, the auxiliary positioning member 10 is disposed opposite to the base 40, and 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 receiving space with the base 40. The measuring assembly 20 and the circuit board 30 are disposed in the accommodating space. One end of the deformation body 21 is connected with the auxiliary positioning element 10, the other end of the deformation body 21 is connected with the base 40, so that the main body part of the deformation body 21 is suspended between the auxiliary positioning element 10 and the base 40, when the nozzle touches the auxiliary positioning element 10, the deformation body 21 is used for receiving the force transmitted by the auxiliary positioning element 10, and the deformation body 21 generates spatial deformation 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 determine a coordinate position of the nozzle according to the received information. The circuit board 30 can also judge the displacement deviation of the spray head according to the measured spray head coordinate position and transmit the displacement deviation to the three-dimensional printing system, or the circuit board 30 directly transmits the measured spray head coordinate position to the three-dimensional printing system, and the three-dimensional printing system judges the displacement deviation of the spray head so as to calibrate the coordinate system in the three-dimensional printing system, thereby realizing automatic calibration of the spray head.

Referring to fig. 2 to 5, in one embodiment of the present application, the deformation body 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.

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

In the embodiment of the present application, the third direction is a direction perpendicular to the base 40, and when the nozzle touches the auxiliary positioning member 10, the deformation of the deformation body 21 in the third direction generally occurs toward the base 40, so the deformation amount of the deformation body 21 in the third direction can be sufficiently detected by providing the third sensor 24 on one side of the third portion 213. The first sensor 22, the second sensor 23, and the third sensor 24 include, but are not limited to, components capable of detecting region deformation, stress change, etc. such as strain gages, piezoceramics, etc. The first sensor 22, the second sensor 23, and the third sensor 24 are all communicatively coupled to the circuit board 30 to transmit the detection signal to the circuit board 30.

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

In the embodiment of the present application, the first portion 211, the second portion 212 and the third portion 213 are located 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 at the same side of the second portion 212, so that the deformation body 21 has a substantially -shaped structure. Therefore, the sensitivity of the deformation body 21 can be improved, and when the deformation body 21 is stressed, obvious deformation can be generated in the three-dimensional space rapidly, so that the sensor can detect deformation amounts in different directions accurately. It will be appreciated that in other embodiments, the deformation body 21 may have other shapes, such as a zigzag shape, an arcuate shape, etc., which is not limited in this application.

As shown in fig. 4, in the embodiment of the present application, the first portion 211, the second portion 212, and the third portion 213 are provided with hollowed-out holes 25, which is beneficial to reducing the weight of the deformation body 21 and improving the sensitivity of the deformation body 21.

Referring to fig. 2, 3 and 4, in one embodiment of the present application, the deformation body 21 further includes a first connection portion 214 and a second connection portion 215. The first connecting portion 214 is disposed at an end of the first portion 211 away from the second portion 212, and the first connecting portion 214 protrudes toward the third portion 213. The second connecting portion 215 is disposed at an end of the third portion 213 away from the second portion 212, and the second connecting portion 215 protrudes toward the first portion 211. The first connecting portion 214 is used for connecting the first portion 211 and the auxiliary positioning element 10. The second connecting portion 215 is used for connecting the third portion 213 and the base 40. The first connecting portion 214 and the second connecting portion 215 are located in an opening area of the shape of , so that the part of the deformation body 21 fixed with the auxiliary positioning element 10 and the base 40 is located on the same side of the deformation body 21, and when the deformation body 21 is stressed, the fixing position does not disperse the stress of the deformation body 21, so that the sensor can fully detect the deformation amount of the deformation body 21 in all directions.

As shown in fig. 3 and 6, the auxiliary positioning member 10 includes a top wall 11 and a side wall 12, and the side wall 12 is disposed around the top wall 11 to form an inner cavity of the auxiliary positioning member 10, so that the auxiliary positioning member 10 is substantially a housing structure. The auxiliary positioning element 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 bump 13 is disposed on a side of the top wall 11 facing the deformation body 21, and the first bump 13 is disposed corresponding to the first connection portion 214. The first bump 13 and the first connection portion 214 are connected by a first fastener 14, the first fastener 14 including, but not limited to, a screw, a pin, or the like. After the auxiliary positioning piece 10, the deformation body 21 and the base 40 are assembled, in a resting state, a gap is reserved between the side wall 12 of the auxiliary positioning piece 10 and the base 40, so that when the spray head touches the top wall 11 of the auxiliary positioning piece 10, the auxiliary positioning piece 10 can move towards the base 40, the deformation body 21 is deformed, deformation of the deformation body 21 in the third direction is conveniently detected, and the coordinate of the spray head in the third direction is judged.

As shown in fig. 2 and 7, the base 40 is provided with a second bump 41, and the second bump 41 is disposed corresponding to the second connection portion 215. The second bump 41 and the second connecting portion 215 are connected by a second fastener 42, and the second fastener 42 includes, but is not limited to, a screw, a pin, or the like.

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 for avoiding the external cable 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 that external equipment is conveniently connected with the circuit board 30 through the cable. When the circuit board 30 is assembled to the base 40, the second bump 41 penetrates through the second through hole 32, so as to position the mounting position of the circuit board 30 on the base 40. In the embodiment of the present application, the second bump 41 and the second through hole 32 are in matching oval shapes, which is beneficial to reducing the rotation or shaking of the circuit board 30 on the base 40. In other embodiments, the second bump 41 and the second through hole 32 may also be rectangular, triangular, polygonal, etc., which is not limited in this application.

Further, the base 40 is further provided with a limiting portion 43, and the limiting portion 43 is located at the outer peripheral side of the circuit board 30 and protrudes from the surface of the base 40. The side wall 12 of the auxiliary positioning element 10 is located outside the limiting portion 43, and the limiting portion 43 is used for resisting the side wall 12 to limit the displacement range of the auxiliary positioning element 10 in the first direction and the second direction. In the embodiment of the present application, the limiting portion 43 is an annular protrusion, and in other embodiments, the limiting portion 43 may be a plurality of protrusion structures distributed at intervals, which is not limited thereto.

Referring to fig. 3 and 8, the auto-calibration device 100 further includes a fixing member 50, and the fixing member 50 is configured to connect the auto-calibration device 100 and the 3D printer 200, and mount the auto-calibration device 100 to the 3D printer 200. In one embodiment of the present application, the fixing member 50 is disposed on a side of the base 40 facing away from the auxiliary positioning member 10, so as to install the automatic calibration device 100 in the 3D printer 200, so as to implement automatic calibration and positioning of the spray head without disassembling the 3D printer 200. In the embodiment of the application, the base 40 is deviated from the side of the auxiliary positioning and is provided with the concave portion 44, the fixing piece 50 is arranged on the concave portion 44, and the lower surface of the fixing piece 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, and the calibration precision is improved. The fixing member 50 includes a magnetic attraction member, and the automatic calibration device 100 is installed in the 3D printer 200 by a magnetic attraction manner, so that the installation process is simple and convenient, and the installation position is convenient to adjust. In other embodiments, the fixing member 50 may further include a suction cup, an adhesive member, etc., which is not limited in this application.

In one embodiment of the present application, the automatic calibration device 100 includes a pressing plate 60, and a receiving slot 46 is further formed on a 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 accommodating groove 461 is communicated with the wire outlet hole 45, and the other end passes through the side wall 12 of the base 40. The first accommodating groove 461 is used for accommodating a cable, so as to avoid the cable from affecting the installation stability of the base 40 on the 3D printer 200. The second receiving groove 462 is disposed on two opposite sides of the first receiving groove 461 and is communicated with the first receiving groove 461. The pressing plate 60 covers part of the first receiving groove 461, and two ends of the pressing plate 60 are disposed in the second receiving groove 462. The wire pressing plate 60 is fixed to the base 40 by a fastener such as a screw to define the cable in the first receiving groove 461. The bottom surface of the pressing plate 60 does not protrude from the bottom surface of the base 40.

Referring to fig. 9 and 10, the implementation of the present application further provides a 3D printer 200, including a showerhead assembly 201, a printing platform 202, a moving assembly 203, and the auto calibration apparatus 100 described in the foregoing embodiments. The moving assembly 203 is used to drive the showerhead 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 towards the spray head assembly 201, so that the spray head in the spray head assembly 201 touches the automatic calibration device 100, the actual coordinate position of the spray head is measured, and the spray head is automatically calibrated and positioned according to the measurement result. Before the calibration process begins, the automatic calibration device 100 may be mounted to any location on the print platform 202 to facilitate calibration of the showerhead assembly 201.

Further, the showerhead assembly 201 includes a first showerhead 2011 and a second showerhead 2012. In embodiments of the present application, the first showerhead 2011 may be a moving showerhead and the second showerhead 2012 may be a fixed showerhead. The calibration process of the first and second heads 2011 and 2012 will be described below.

The position of the auto-calibration fixture 100 remains fixed after it is mounted to the print platform 202. The auto-calibration apparatus 100 may be communicatively connected to the 3D printer 200 or to an external control device. The printing platform 202 drives the automatic calibration platform to move up and down, and the moving assembly 203 drives the spray head assembly 201 to move horizontally. Firstly, the first spray head 2011 is contacted with different positions of the top wall 11 of the auxiliary positioning piece 10, then, the first spray head 2011 is contacted with different positions of the side wall 12 of the auxiliary positioning piece 10, the actual coordinate positions of the first spray head 2011 at different positions are judged according to the deformation amount of the deformation body 21 in the three-dimensional space generated when the spray head contacts with the different positions, the offset of the first spray head 2011 is calculated according to the actual coordinate positions, and the 3D printer 200 can automatically calibrate and position the first spray head 2011 according to the offset. After adjusting the relative positions of the first nozzle 2011 and the second nozzle 2012, the moving assembly 203 and the printing platform 202 may drive the second nozzle 2012 to contact the auxiliary positioning member 10 of the automatic calibration device 100, so as to perform automatic calibration on the second nozzle 2012 in a similar manner, which is not repeated here.

The above embodiments are only for illustrating the technical solution of the present application and not for limiting, and although the present application has been described in detail with reference to the above preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present application may be modified or substituted without departing from the spirit and scope of the technical solution of the present application.

Claims (10)

1. An automatic calibration device for a 3D printer, comprising:

the auxiliary positioning piece is used for generating force and transmitting the force when being touched;

a measurement assembly including a deformation body coupled to the auxiliary positioning member to receive a force transmitted by the auxiliary positioning member and to generate deformation, and a sensor configured to detect deformation of the deformation 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;

and the circuit board is used for acquiring the induction information of the sensor.

2. The automatic calibration device for a 3D printer of claim 1, wherein the sensor comprises at least a first sensor, the measurement assembly further comprising a displacement assembly coupled to the first sensor, the displacement assembly controlling the first sensor to move to detect deformation of the deformable body in a first direction, a second direction, and a third direction;

and/or, the sensor at least comprises a first sensor and a second sensor, the measuring assembly further comprises a displacement assembly connected with the sensor, the first sensor is used for detecting deformation of the deformation body in the first direction, and the displacement assembly controls the second sensor to move so as to detect deformation of the deformation body in the second direction and the third direction.

3. The automatic calibration device for a 3D printer according to claim 1, wherein the sensor comprises at least a first sensor, a second sensor and a third sensor, and the first sensor is disposed on a side edge of the deformed body in a first direction, and is configured to detect a deformation amount of the deformed body in the first direction; the second sensor is arranged on the side edge of the deformation body in the second direction and is used for detecting the deformation quantity of the deformation body in the second direction; the third sensor is arranged on the side edge of the deformation body in the third direction and used for detecting the deformation quantity of the deformation body in the third direction.

4. An automatic calibration device for a 3D printer according to claim 1 or 3, characterized in that: the measuring device further comprises a base, wherein the auxiliary positioning piece, the measuring component and the circuit board are arranged on the base, a containing space is formed between the auxiliary positioning piece and the base, and the measuring component and the circuit board are arranged in the containing space.

5. The automatic calibration device for a 3D printer of claim 4, wherein:

the auxiliary positioning piece comprises a top wall and a side wall, the side wall is arranged around the top wall, the accommodating space is formed among the top wall, the side wall and the base, a first lug is arranged on one side of the top wall, which faces the deformation body, and the first lug is connected with one end of the deformation body;

the base is provided with a second bump, and the second bump is connected with the other end of the deformation body.

6. The automatic calibration device for a 3D printer of claim 5, wherein:

the deformation body comprises a first connecting part and a second connecting part, wherein the first connecting part is correspondingly arranged with the first convex block and is used for connecting one end of the deformation body with the first convex block, and the second connecting part is correspondingly arranged with the second convex block and is used for connecting the other end of the deformation body with the base.

7. The automatic calibration device for a 3D printer of claim 5, wherein:

the base is provided with a limiting part, the limiting part is positioned on the outer peripheral side of the circuit board and is convexly arranged on one side of the base facing the auxiliary positioning piece, the side wall of the auxiliary positioning piece is positioned on the outer side of the limiting part, and the limiting part is used for resisting the side wall.

8. The automatic calibration device for a 3D printer according to claim 1, wherein:

the auto-calibration device includes a fixture configured to connect the auto-calibration device and a 3D printer, mounting the auto-calibration device to the 3D printer.

9. The automatic calibration device for a 3D printer of claim 8, wherein: the fixing piece comprises a magnetic attraction piece.

10. A 3D printer comprising a spray head assembly, a printing platform, a moving assembly for driving the spray head assembly to move, and an automatic calibration device according to any one of claims 1 to 9, the automatic calibration device being detachably mounted on the printing platform for automatically calibrating the spray head assembly.