A construction platform with self-leveling function

Abstract

The present invention discloses a construction platform with a self-leveling function, including a material trough, a construction plate, a panel, an automatic leveling component and a pressure sensor, wherein the automatic leveling component is located between the construction plate and the panel, the surface of the construction plate is parallel to or at an angle to the surface of the panel, the construction plate is parallel to or at an angle to the material trough, and the construction plate transmits the pressure signal of the material trough to the pressure sensor through the automatic leveling component and the panel; the automatic leveling component includes a first adjustment component, a second adjustment component and a shell, the construction plate is kept stationary in the horizontal direction through the first adjustment component, the construction plate floats up and down in the Z-axis direction through the second adjustment component, the construction plate and the panel are connected through the first adjustment component and the second adjustment component, and the shell is fixedly connected to the panel. The construction platform with a self-leveling function has the advantages of automatic leveling function, high printing efficiency and success rate.

Description

Technical Field

[0001] The invention relates to the technical field of printer leveling, and in particular to a building platform with a self-leveling function. Background Art

[0002] The basic principle of light-curing 3D printing is to stack materials layer by layer to build the three-dimensional shape of the target part. First, the geometric shape of the target part is decomposed into a series of horizontal plane layers. Then, a beam of light with a specific wavelength is used to scan the liquid photosensitive resin in the material tank layer by layer. At each level, the area irradiated by the beam will solidify, while the area not affected by the beam remains in a liquid state. Through this layer-by-layer scanning and curing method, the complete shape of the target part is gradually built up. This method can make the material utilization efficiency close to 100%.

[0003] In light-curing 3D printing, the build platform must be kept parallel to the LCD exposure screen and lifted vertically according to the thickness of the printing layer; otherwise, the printed model will not be able to stick to the build platform and the printing will fail. Therefore, in light-curing 3D printing, the leveling of the build platform is very important. The current mainstream leveling methods are generally two-point fixed leveling and four-point fixed leveling structures; for both leveling methods, both require a tedious and complicated leveling process, which not only requires users to spend a long learning cost, but also greatly reduces printing efficiency and success rate.

[0004] Therefore, in view of the deficiencies in the prior art, a construction platform with a self-leveling function is provided. Summary of the invention

[0005] The present invention provides a building platform with a self-leveling function, aiming to solve the problem that the building platform is difficult to level during light-curing 3D printing, resulting in reduced printing efficiency and success rate.

[0006] The present invention adopts the following technical solutions:

[0007] A building platform with a self-leveling function, characterized in that it comprises a material trough, a building plate, a panel and an automatic leveling component, wherein the automatic leveling component is located between the building plate and the panel, the surface of the building plate is parallel to or at an angle to the surface of the panel, the building plate is parallel to or at an angle to the material trough, and the building plate transmits a pressure signal of the material trough to the pressure sensor through the automatic leveling component and the panel;

[0008] The automatic leveling assembly includes a first adjustment assembly, a second adjustment assembly and a shell. The building plate is kept stationary in the horizontal direction by the first adjustment assembly, and the building plate floats up and down in the Z-axis direction by the second adjustment assembly. The building plate is connected to the panel through the first adjustment assembly and the second adjustment assembly, and the shell is fixedly connected to the panel.

[0009] As a further improvement of the technical solution of the present invention, the first adjustment assembly includes a plurality of first fixed columns and a first elastic member, one end of the first fixed column is fixedly connected to the building plate, the other end of the first fixed column passes through the outer shell and is fixedly connected to the first elastic member, and the other end of the first elastic member is fixedly connected to the panel.

[0010] As a further improvement of the technical solution of the present invention, the second adjustment assembly includes a plurality of second fixed columns and a second elastic member, one end of the second fixed column is fixedly connected to the building plate, the second elastic member is nested in one end of the second fixed column close to the panel, and the second elastic member is respectively abutted against the panel and the second fixed column.

[0011] As a further improvement of the technical solution of the present invention, the building platform also includes a locking assembly, which includes a locking wrench, a connecting block, a connecting rod and a lifting platform. The connecting block is limitedly connected to the lifting platform, and the lifting platform is fixedly connected to the panel. The locking wrench is rotatably connected to the connecting block through the connecting rod, and the connecting block is inserted into the lifting platform and locked with the lifting platform through the locking wrench.

[0012] As a further improvement of the technical solution of the present invention, the locking assembly further includes a third elastic member, the pressure sensor is attached to the connecting block, the third elastic member is located in the lifting platform, one end of the third elastic member is fixedly connected to the panel, and the other end is separated from or interference fit with the locking wrench;

[0013] When the third elastic member abuts against the locking wrench, the locking assembly is locked. When the locking assembly is locked, it includes a natural state and a deformed state:

[0014] When in the natural state: the third elastic member is in abutment with the locking wrench;

[0015] When in a deformed state: the third elastic member is pressed against and matched with the locking wrench, the locking wrench presses against the connecting block through the connecting rod, and the connecting block is deformed.

[0016] As a further improvement of the technical solution of the present invention, it also includes a pressure sensor and a master control system, the pressure sensor is connected to the master control system, the pressure sensor is attached to the connecting block, the pressure signal of the material trough applied to the building plate is transmitted to the pressure sensor through the automatic leveling component, the panel, the third elastic member and the connecting block, and the master control system receives the change value of the deformation signal of the pressure sensor and then analyzes and feeds back.

[0017] As a further improvement of the technical solution of the present invention, the deformation signal received by the pressure sensor includes a first deformation signal and a second deformation signal;

[0018] When the first deformation signal is generated, the building plate abuts against the material trough to generate a first reaction force, and the first reaction force is transmitted to the connecting block through the third elastic member to cause deformation;

[0019] When the second deformation signal is generated, the building plate abuts against the resin in the material tank to generate a second reaction force, and the second reaction force is transmitted to the connecting block through the third elastic member to cause deformation.

[0020] As a further improvement of the technical solution of the present invention, the lifting platform is provided with a slot for inserting the connecting block, the bottom of the slot is provided with an abutment surface that cooperates with the top of the connecting block, and the opening of the slot and the bottom are provided with an oblique angle.

[0021] As a further improvement of the technical solution of the present invention, the locking wrench includes a wrench part and a locking part, the wrench part is fixedly connected to the locking part, the locking part is abutted against the third elastic member, and the cross-section of the locking part is an eccentric circular arc.

[0022] The present invention also provides a photo-curing 3D printer, including the above-mentioned building platform with self-leveling function, and also including a light source, a screen, a tilting release mechanism and a lift. The light source is located below the building plate and passes through the screen and the material trough in sequence. The screen and the material trough are fixedly connected to the tilting release mechanism. The building plate is suspended above the material trough through the lift.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The building platform with self-leveling function proposed by the present invention, during the printing process, the building plate must remain parallel to the screen and be lifted vertically according to the thickness of the printing layer. By setting an automatic leveling component on the building platform, the building plate is transferred through the automatic leveling component and the panel to achieve automatic leveling printing, thereby improving the adaptive ability of the building platform. The automatic leveling component includes a first adjustment component, a second adjustment component and a shell. The building plate is kept stationary in the horizontal direction by the first adjustment component, and the building plate floats up and down in the Z-axis direction by the second adjustment component. The building plate is connected to the panel through the first adjustment component and the second adjustment component, and the shell is fixedly connected to the panel, which makes it unnecessary to manually level the building platform during the printing process, thereby achieving automatic leveling of the building platform of the light-curing 3D printer. The building platform with self-leveling function has the characteristics of automatic leveling function, high printing efficiency and success rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The technology of the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0026] Figure 1 is an exploded diagram of a build platform with self-leveling capabilities;

[0027] Figure 2 It is a schematic diagram of the three-dimensional structure of a building platform with a self-leveling function;

[0028] Figure 3 It is a schematic diagram of the structure of the front and rear locking of the locking assembly in the building platform with self-leveling function;

[0029] Figure 4 It is a schematic diagram of the structure of the locking components in the building platform with self-leveling function being locked up and down;

[0030] Figure 5 It is a schematic diagram of the overall structure of the building platform with self-leveling function;

[0031] Figure 6 It is a schematic diagram of the structure before printing in a build platform with self-leveling function;

[0032] Figure 7 It is a schematic diagram of the structure being printed in a build platform with a self-leveling function;

[0033] Figure 8 It is a schematic diagram of the structure after printing compensation in a build platform with a self-leveling function;

[0034] Fig. 9 It is a structural schematic diagram of residual material detection of a building mechanism in a building platform with a self-leveling function;

[0035] Fig.10 It is a schematic diagram of the structure of foreign body detection of a building mechanism in a building platform with a self-leveling function;

[0036] Fig.11 An exploded view of the tilt release mechanism in a self-leveling build platform.

[0037] Reference numerals:

[0038] 1. Material trough; 2. Build plate; 3. Panel;

[0039] 4. Automatic leveling assembly; 41. First fixed column; 42. First elastic member; 43. Housing; 44. Second fixed column; 45. Second elastic member;

[0040] 5. Locking assembly; 51. Locking wrench; 52. Connecting block; 53. Lifting platform; 54. Connecting rod; 55. Third elastic member;

[0041] 6. Light source; 7. Tilt release mechanism; 71. Folding middle plate; 72. Tilt mechanism; 73. Fixed middle plate; 74. Driving part; 75. Eccentric wheel; 76. Transmission assembly; 8. Elevator. DETAILED DESCRIPTION

[0042] The following will be combined with the embodiments and drawings to clearly and completely describe the concept, specific structure and technical effects of the present invention, so as to fully understand the purpose, scheme and effect of the present invention. It should be noted that the embodiments in this application and the features in the embodiments can be combined with each other without conflict. The same reference numerals used throughout the drawings indicate the same or similar parts.

[0043] A self-leveling construction platform, referring to Figures 1 to 11 , including a material trough 1, a building plate 2, a panel 3 and an automatic leveling component 4;

[0044] In one embodiment, in order to avoid the situation where the printed model cannot stick to the building plate 2 and cause printing failure, the automatic leveling component 4 is located between the building plate 2 and the panel 3, the surface of the building plate 2 is parallel to or at an angle to the surface of the panel 3, and the building plate 2 is parallel to or at an angle to the material trough 1.

[0045] Among them, general light-curing 3D printers do not have residual material detection and board drop detection functions. If you fail to pay attention to the printing process in time, it is very likely that the model printing will fail due to insufficient residual material; the LCD screen will be damaged due to failure to notice the foreign matter in the build plate 2 and the material tank 1. By setting a pressure sensor, the build plate 2 transmits the pressure signal of the material tank 1 to the pressure sensor through the automatic leveling component 4 and the panel 3, realizing the residual material detection function, foreign matter detection function, and abnormal situation detection function of the light-curing 3D printer. In addition, this sensor system can also monitor the volume change of the resin in the material tank 1 and the release state during the printing process, thereby realizing real-time detection of the printing process.

[0046] In one embodiment, referring to Figure 1 As shown, the automatic leveling component 4 includes a first adjusting component, a second adjusting component and a shell 43. The building plate 2 is kept stationary in the horizontal direction by the first adjusting component, and the building plate 2 floats up and down in the Z-axis direction by the second adjusting component. The building plate 2 is connected to the panel 3 through the first adjusting component and the second adjusting component, and the shell 43 is fixedly connected to the panel 3.

[0047] Among them, during the printing process, the building plate 2 must remain parallel to the screen and be lifted vertically according to the thickness of the printing layer. By setting an automatic leveling component 4 on the building platform, the building plate 2 is transferred through the automatic leveling component 4 and the panel 3 to achieve automatic leveling printing and improve the adaptive ability of the building platform. The automatic leveling component 4 includes a first adjustment component, a second adjustment component and a shell 43. The building plate 2 is kept stationary in the horizontal direction by the first adjustment component, and the building plate 2 floats up and down in the Z-axis direction by the second adjustment component. The building plate 2 is connected to the panel 3 through the first adjustment component and the second adjustment component. The shell 43 is fixedly connected to the panel 3, which makes it unnecessary to manually level the building platform during the printing process, and realizes the automatic leveling of the building platform of the light-curing 3D printer. The building platform with self-leveling function has the characteristics of automatic leveling function, high printing efficiency and success rate.

[0048] In one embodiment, the first adjustment assembly includes a plurality of first fixed columns 41 and a first elastic member 42, one end of the first fixed column 41 is fixedly connected to the building plate 2, the other end of the first fixed column 41 passes through the housing 43 and is fixedly connected to the first elastic member 42, and the other end of the first elastic member 42 is fixedly connected to the panel 3. The first adjustment assembly keeps the building plate 2 and the panel 3 stationary in the horizontal plane and can move up and down in the Z-axis direction.

[0049] In one embodiment, the second adjustment assembly includes a plurality of second fixed columns 44 and second elastic members 45. One end of the second fixed column 44 is fixedly connected to the building plate 2. The second elastic member 45 is nested in one end of the second fixed column 44 close to the panel 3. The second elastic member 45 is respectively in contact with the panel 3 and the second fixed column 44. The second fixed column 44 and the panel 3 are floating, and a second elastic member 45 is installed between the two, so that the building plate 2 and the panel 3 are fixed in a horizontal plane, and can float up and down in the Z-axis direction according to the elastic force of the second elastic member 45. A sealing ring is provided in the middle of the first fixed column 41 and the second fixed column 44.

[0050] Preferably, the first elastic member 42 and the second elastic member 45 are both located inside the housing 43 , the first elastic member 42 is a supporting spring, and the second elastic member 45 is a spring.

[0051] In one embodiment, the building platform also includes a locking assembly 5, which includes a locking wrench 51, a connecting block 52, a connecting rod 54 and a lifting platform 53. The connecting block 52 is limitedly connected to the lifting platform 53, and the lifting platform 53 is fixedly connected to the panel 3. The locking wrench 51 is rotatably connected to the connecting block 52 through the connecting rod 54, and the connecting block 52 is inserted into the lifting platform 53 and is locked with the lifting platform 53 through the locking wrench 51.

[0052] In one embodiment, referring to Figure 2-4As shown, the locking assembly 5 also includes a third elastic member 55, which is located in the lifting platform 53. One end of the third elastic member 55 is fixedly connected to the panel 3, and the other end is separated or interference fit with the locking wrench 51; when the third elastic member 55 abuts against the locking wrench 51, the locking assembly 5 is locked. When the locking assembly 5 is locked, it includes a natural state and a deformed state: when in the natural state: the third elastic member 55 abuts against the locking wrench 51; when in the deformed state: the third elastic member 55 abuts against the locking wrench 51, and the locking wrench 51 abuts against the connecting block 52 through the connecting rod 54, and the connecting block 52 is deformed.

[0053] Preferably, the third elastic member 55 is a pressure spring sheet, and the cross section of the third elastic member 55 is in a "X" shape.

[0054] In one embodiment, a pressure sensor and a master control system are further included. The pressure sensor is connected to the master control system. The pressure sensor is attached to the connecting block 52. The pressure signal of the material tank 1 acting on the building plate 2 is transmitted to the pressure sensor through the automatic leveling component 4, the panel 3, the third elastic member 55 and the connecting block 52. The master control system receives the change value of the deformation signal of the pressure sensor and then analyzes and feeds back.

[0055] In one embodiment, the deformation signal received by the pressure sensor includes a first deformation signal and a second deformation signal; when the first deformation signal is present: the building plate 2 presses against the material trough to generate a first reaction force, and the first reaction force is transmitted to the connecting block 52 through the third elastic member 55 to cause deformation; when the second deformation signal is present: the building plate 2 presses against the resin in the material trough 1 to generate a second reaction force, and the second reaction force is transmitted to the connecting block 52 through the third elastic member 55 to cause deformation.

[0056] In one embodiment, referring to Figure 3 As shown, the bottom of the slot is provided with an abutment surface that cooperates with the top of the connecting block 52 to achieve the front and rear limit of the connecting block 52 and the lifting platform 53. The limit is achieved by the two trapezoidal surfaces of the connecting block 52 and the lifting platform 53. There is a top-down process when pushing the connecting block 52 inward to determine whether the connecting block 52 is in place. An angle is provided at the opening of the slot and the bottom. The trapezoidal surface is a 45° angle for guiding. The lifting platform 53 is provided with a slot for inserting the connecting block 52, so that the process of pushing the connecting block 52 into the slot is smoother.

[0057] In one embodiment, referring to Figure 4As shown, the locking spanner 51 is an eccentric wheel 75 locking spanner 51, and the locking function is realized by the self-locking of the eccentric wheel 75. The locking spanner 51 includes a spanner portion and a locking portion, the spanner portion is fixedly connected to the locking portion, the locking portion and the third elastic member 55 are matched against each other, and the cross section of the locking portion is eccentric arc-shaped. The scheme currently adopted is to use a manganese steel spring piece as the third elastic member 55. When the eccentric wheel 75 locking spanner 51 is in the locking position, there is an interference amount of 0.3mm between the cam surface of the locking spanner 51 and the third elastic member 55, forcing the third elastic member 55 to deform, and then cooperating with the self-locking mechanism of the eccentric wheel 75 locking spanner 51 to realize locking. This scheme can also change the third elastic member 55 into the locking spanner 51, and the same function can be achieved by changing the material of the locking spanner 51 into an elastic plastic material.

[0058] In one embodiment, referring to Figure 5 As shown, it also includes a light source 6, a screen, a tilted release mechanism and a lift 8. The light source 6 is located below the building plate 2 and passes through the screen and the material trough 1 in sequence. The screen and the material trough 1 are fixedly connected to the tilted release mechanism. The building plate 2 is suspended above the material trough 1 by the lift 8.

[0059] In one embodiment, referring to Fig.11 As shown, the inclined release mechanism includes a folding middle plate, a tilting mechanism 72 and a fixed middle plate 73. The folding middle plate is fixedly connected to the material trough 1, and the other end of the folding middle plate is movably connected to the tilting mechanism 72. The folding middle plate is fixedly connected to the material trough 1, and the tilting mechanism 72 drives the material trough 1 to tilt up and down through the folding middle plate. The fixed middle plate 73 is located above the folding middle plate, and the fixed middle plate 73 is parallel to or at an angle to the folding middle plate; the tilting mechanism 72 includes a driving member 74, an eccentric wheel 75 and a transmission assembly 76. The eccentric wheel 75 is fixedly connected to the output end of the driving member 74, one end of the transmission assembly 76 is rotationally connected to the eccentric wheel 75, and the other end is fixedly connected to the folding middle plate.

[0060] In one embodiment, the construction platform includes a compensation function, referring to Figure 6-Figure 8 As shown, at this time, it is assumed that there is an angle between the build plate 2 and the screen. First, the build platform will follow the elevator 8 back to the zero point, because under the force of the four second elastic members 45, the build plate 2 will remain in full contact with the screen. At this time, the screen will have a reaction force on the build platform, and the connecting block 52 will be slightly deformed due to this reaction force, thereby triggering the pressure sensor to produce a signal change. The master control system will control the position of the build platform on the Z axis according to the change value of the pressure sensor to achieve the appropriate pre-pressure of the build platform. When each layer is printed, the build platform will be lifted one layer according to the layer thickness until the build plate 2 completely leaves the screen, and after compensation, the bottom of the build plate 2 will be completely parallel to the screen.

[0061] In one embodiment, referring to Fig. 9As shown, the building platform includes a residual material detection function. When the building platform returns to zero, when the building plate 2 is about to approach the highest point of the material tank 1, the descending speed of the elevator 8 is adjusted, and the building plate 2 will descend at a slow speed. When the building plate 2 contacts the resin liquid surface, the resin will give the building plate 2 a force f2. Similarly, the pressure sensor located under the connecting block 52 will generate a signal change value. At this time, the height of the elevator 8 is the liquid level of the resin in the material tank 1. According to the effective bottom area of ​​the material tank 1, the volume and weight of the resin can be calculated, so as to calculate whether the resin in the material tank 1 meets the amount of resin required for this printing. When the resin is insufficient, the printer will promptly remind the user to add resin. During the printing process, each time the mold is released, the stress on the building plate 2 will change accordingly, and the pressure sensor will record and feedback to the printer chip at all times. If an accident occurs during the printing process, resulting in a printing failure, the pressure sensor will detect that the detection value has not changed for a period of time, and the printer will recognize the printing failure and remind the user to handle it in time.

[0062] In one embodiment, referring to Fig.10 As shown, the building mechanism includes a foreign matter detection function. According to the residual material detection function, when the building plate 2 sinks below the resin liquid level, if there is a foreign matter in the building plate 2 or the material tank 1, at this time, when the elevator 8 continues to return to zero, the building mechanism will be subjected to a large reaction force, and the pressure sensor will produce a large change amplitude. According to the change amplitude, the master control system can determine the abnormal surface force of the resin and immediately make a pop-up window prompt, indicating that there is a foreign matter in the material tank 1 or the building plate 2, please clean it before continuing printing.

[0063] Among them, during the printing process, when the build plate 2 continues to descend, or the pressure sensor suddenly undergoes a relatively large stress change (at this time the stress change has exceeded the stress change interval value detected by the resin), it means that there is a foreign object in the build plate 2 or the material tank 1. At this time, the main control system immediately stops the action of the elevator 8, and prompts the operator that there is a foreign object on the material tank 1 or the build plate 2, which needs to be cleaned before printing, thereby preventing the screen from being damaged.

[0064] According to the different stress levels, the photocuring 3D printer can detect residual material, foreign matter, and abnormal conditions during printing. The application of this pressure sensor can not only ensure the fitting state of the build plate 2 and reduce human intervention, but also effectively prevent printing failures. By real-time monitoring of the resin volume and release state, users can better understand the working state of the printer, thereby improving the reliability and success rate of printing. This comprehensive improvement plan can provide users with a better and more convenient printing experience.

[0065] For other contents of the construction platform with self-leveling function of the present invention, please refer to the prior art and will not be described in detail here.

[0066] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0067] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0068] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0069] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0070] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0071] The above are only preferred embodiments of the present invention and are not intended to limit the present invention in any form. Therefore, any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A construction platform with self-leveling function, characterized in that: It includes a material trough, a building plate, a panel and an automatic leveling component, wherein the automatic leveling component is located between the building plate and the panel, the surface of the building plate is parallel to or at an angle to the surface of the panel, and the building plate is parallel to or at an angle to the material trough; The automatic leveling assembly comprises a first adjustment assembly, a second adjustment assembly and a housing, the building plate is kept stationary in the horizontal direction by the first adjustment assembly, the building plate floats up and down in the Z-axis direction by the second adjustment assembly, the building plate is connected to the panel by the first adjustment assembly and the second adjustment assembly, and the housing is fixedly connected to the panel; The first adjustment assembly includes a plurality of first fixed columns and a first elastic member, one end of the first fixed column is fixedly connected to the building plate, the other end of the first fixed column passes through the housing and is fixedly connected to the first elastic member, and the other end of the first elastic member is fixedly connected to the panel; The second adjustment assembly includes a plurality of second fixed columns and a second elastic member, one end of the second fixed column is fixedly connected to the building plate, the second elastic member is nested in one end of the second fixed column close to the panel, and the second elastic member is respectively abutted against the panel and the second fixed column; The building platform also includes a locking assembly, which includes a locking wrench, a connecting block, a connecting rod and a lifting platform. The connecting block is limitedly connected to the lifting platform, and the lifting platform is fixedly connected to the panel. The locking wrench is rotatably connected to the connecting block through the connecting rod, and the connecting block is inserted into the lifting platform and is locked and connected to the lifting platform through the locking wrench. The locking assembly further includes a third elastic member, the third elastic member is located in the lifting platform, one end of the third elastic member is fixedly connected to the panel, and the other end is separated from or interference fit with the locking wrench; When the third elastic member abuts against the locking wrench, the locking assembly is locked. When the locking assembly is locked, it includes a natural state and a deformed state: When in the natural state: the third elastic member is in abutment with the locking wrench; When in a deformed state: the third elastic member cooperates with the locking wrench, the locking wrench presses against the connecting block through the connecting rod, and the connecting block is deformed; It also includes a pressure sensor and a master control system, wherein the pressure sensor is connected to the master control system, the pressure sensor is attached to the connection block, and the pressure signal of the material tank applied to the building plate is transmitted to the pressure sensor through the automatic leveling component, the panel, the third elastic member and the connection block, and the master control system receives the change value of the deformation signal of the pressure sensor and then analyzes and feeds back; The deformation signal received by the pressure sensor includes a first deformation signal and a second deformation signal; When the first deformation signal is generated, the building plate abuts against the material trough to generate a first reaction force, and the first reaction force is transmitted to the connecting block through the third elastic member to cause deformation; When the second deformation signal is generated, the building plate abuts against the resin in the material tank to generate a second reaction force, and the second reaction force is transmitted to the connecting block through the third elastic member to cause deformation.

2. The construction platform with self-leveling function according to claim 1, characterized in that: The lifting platform is provided with a slot for inserting the connecting block, the bottom of the slot is provided with an abutting surface that cooperates with the top of the connecting block, and an oblique angle is provided between the opening of the slot and the bottom.

3. The construction platform with self-leveling function according to claim 1, characterized in that: The locking wrench comprises a wrench portion and a locking portion, the wrench portion is fixedly connected to the locking portion, the locking portion is abutted against the third elastic member, and the cross-section of the locking portion is an eccentric arc shape.

4. A light-curing 3D printer, characterized in that: A building platform with a self-leveling function comprising the building plate according to any one of claims 1 to 3, further comprising a light source, a screen, a tilting release mechanism and a lift, wherein the light source is located below the building plate and sequentially passes through the screen and the material trough, the screen and the material trough are fixedly connected to the tilting release mechanism, and the building plate is suspended above the material trough by the lift.

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