WO2024082666A1 - 热床调平装置及3d打印设备 - Google Patents

热床调平装置及3d打印设备 Download PDF

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Publication number
WO2024082666A1
WO2024082666A1 PCT/CN2023/101396 CN2023101396W WO2024082666A1 WO 2024082666 A1 WO2024082666 A1 WO 2024082666A1 CN 2023101396 W CN2023101396 W CN 2023101396W WO 2024082666 A1 WO2024082666 A1 WO 2024082666A1
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WO
WIPO (PCT)
Prior art keywords
hot bed
cantilever
bed plate
leveling device
plate
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PCT/CN2023/101396
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English (en)
French (fr)
Inventor
唐京科
吴大江
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深圳市创想三维科技股份有限公司
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Publication of WO2024082666A1 publication Critical patent/WO2024082666A1/zh

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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Definitions

  • the present application relates to the field of 3D printing technology, and in particular to a hot bed leveling device and a 3D printing device.
  • a hot bed leveling device is provided.
  • a heated bed leveling device comprises a heated bed assembly, comprising a heated bed plate and a support plate, wherein the support plate is provided with a cantilever member, and the heated bed plate is connected to the cantilever member;
  • a sensor is disposed on the cantilever and is used to detect the deformation of the cantilever
  • a print head is located on a side of the heated bed plate away from the support plate, the print head and the heated bed plate are relatively movable, and the print head is used to alternately abut against different positions of the heated bed plate;
  • the cantilever member When the print head abuts against the hot bed plate, the cantilever member will deform to trigger the sensor.
  • one end of the cantilever is connected to the support plate, and the other end is suspended in the air, and the heated bed plate is connected to the end of the cantilever close to the suspended end.
  • the senor is connected to an end of the cantilever away from the suspension.
  • a "U"-shaped through hole is provided on the support plate, and the area of the support plate enclosed in the through hole forms the cantilever member.
  • the senor is disposed on a side of the cantilever member facing away from the heated bed plate.
  • the number of the cantilever members is four, which are respectively arranged on the support plate at areas corresponding to the four corners of the hot bed plate, and each of the cantilever members is provided with a sensor.
  • the hot bed leveling device also includes a connecting rod and a fastener, one end of the connecting rod is connected to the hot bed plate, and the other end is passed through the cantilever member, and the fastener is connected to one end of the connecting rod passing through the cantilever member and abuts against the cantilever member.
  • the cantilever member further includes an isolation column, which is sleeved on the connecting rod and arranged between the hot bed plate and the cantilever member.
  • the heated bed leveling device further comprises a support seat, the support plate is connected to the support seat, and in a direction perpendicular to the heated bed plate, a projected edge of the cantilever member is located outside a projected edge of the support seat.
  • the present application also provides a 3D printing device that can solve at least one of the above technical problems.
  • a 3D printing device comprises the above-mentioned hot bed leveling device.
  • FIG1 is a front view of a hot bed leveling device according to some embodiments of the present application.
  • FIG2 is a schematic diagram of the cooperation between a heated bed assembly and a sensor in a heated bed leveling device according to some embodiments of the present application;
  • Fig. 3 is an enlarged view of Fig. 2;
  • FIG. 4 is a partial exploded view of a hot bed leveling device according to some embodiments of the present application.
  • Figure Number 100-heat bed assembly; 110-heat bed plate; 120-support plate; 121-notch; 130-cantilever member; 140-through hole; 200 - sensor; 300 - print head; 410 - connecting rod; 420 - fastener; 430 - isolation column; 440 - support seat.
  • 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 this application, the meaning of "plurality” is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
  • 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.
  • installed 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.
  • the specific meanings of the above terms in this application can be understood according to specific circumstances.
  • 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.
  • a first feature being “above”, “above”, and “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”, and “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.
  • Figure 1 is a front view of a heated bed leveling device provided in an embodiment of the present application
  • Figure 2 is a schematic diagram of the cooperation between a heated bed assembly and a sensor in a heated bed leveling device provided in an embodiment of the present application.
  • the heated bed leveling device includes a heated bed assembly 100, a sensor 200 and a print head 300;
  • the heated bed assembly 100 includes A hot bed plate 110 and a support plate 120, wherein a cantilever 130 is disposed on the support plate 120, and the hot bed plate 110 is connected to the cantilever 130;
  • a sensor 200 is disposed on the cantilever 130, and is used to detect the deformation amount of the cantilever 130;
  • a print head 300 is located on a side of the hot bed plate 110 away from the support plate 120, the print head 300 and the hot bed plate 110 can move relatively, and the print head 300 is used to alternately abut against different positions of the hot bed plate 110; when the print head 300 abuts against the hot bed plate 110, the cantilever 130 will deform to trigger the sensor 200.
  • the hot bed leveling device in the present application is applied to 3D printing equipment, and the print head 300 is used to extrude consumables toward the hot bed plate 110 to form a printed model. In order to ensure the quality of the printed model, a leveling process is required.
  • the 3D printing equipment also includes a controller and a drive motor.
  • the drive motor and the sensor 200 are both electrically connected to the controller.
  • the drive motor is used to drive the print head 300 to move toward the hot bed plate 110.
  • the sensor 200 is triggered, thereby sending information to the controller, so that the controller controls the drive motor to stop moving and obtains the height value of the current position of the print head 300.
  • the print head 300 and the heated bed plate 110 can move relative to each other, so that the print head 300 can alternately abut against different positions of the heated bed plate 110, and the printing platform is connected to the support plate 120 through the cantilever 130, so that the pressure applied by the print head 300 to the printing platform can be transmitted, so that the cantilever 130 is deformed, thereby triggering the sensor 200, and obtaining the current position information of the print head 300, so that the height value of each point on the heated bed plate 110 for contacting the nozzle can be obtained, and the height error of the heated bed plate 110 is automatically compensated by software during printing (it is a traditional technology, so it will not be described in detail), so as to achieve the leveling of the heated bed.
  • the leveling is integrated on the heated bed assembly 100 in the present application, which improves the strength of the nozzle and the stability of printing, thereby improving the printing quality.
  • the setting of the cantilever 130 makes it easy for the cantilever 130 to deform when the hot bed plate 110 is subjected to the pressure of the print head 300, so that the sensor 200 can accurately sense the deformation, so that when the print head 300 just abuts against the hot bed plate 110, it can be triggered more accurately and sensitively, thereby improving the leveling accuracy.
  • the print head 300 when the print head 300 abuts against the heated bed plate 110, it means that the print head 300 just touches the heated bed plate 110, rather than squeezing the heated bed plate 110, and the heated bed plate 110 will not be obviously deformed due to the touch of the print head 300; it can be understood that at this time, the heated bed plate 110 undergoes microscopic deformation, and thus it can be considered that the heated bed plate 110 hardly moves, so that after the print head 300 abuts against the heated bed plate 110, there is no need to additionally convert the displacement of the heated bed plate 110, and the height value of the contact position between the heated bed plate 110 and the print head 300 can be obtained based on the position of the print head 300.
  • the sensor 200 can detect the deformation.
  • the sensor 200 detects that the deformation of the cantilever 130 is greater than a preset threshold, the sensor 200 is triggered to send a signal that the print head 300 just contacts the heated bed plate 110. In this way, when leveling, when the sensor 200 is triggered, it means that the print head 300 just contacts the heated bed plate 110.
  • the senor 200 is a strain gauge.
  • the strain gauge When the cantilever 130 is deformed, the strain gauge will also be deformed, and the resistance value of the strain gauge will change accordingly.
  • the control circuit of the strain gauge itself converts the resistance change into a voltage change and transmits it to the controller.
  • the slider plate supports the heated bed plate 110 through the cantilever 130, and the print head 300 moves downward from the initial height toward the heated bed plate 110 to contact different positions on the heated bed plate 110.
  • the print head 300 abuts against the heated bed plate 110
  • the pressure on the heated bed plate 110 is transmitted to the cantilever 130, and the cantilever 130 is slightly deformed.
  • the deformation is detected by the sensor 200.
  • the sensor 200 is triggered and sends information to the controller, so that the controller controls the drive motor to stop moving.
  • the print head 300 stops moving, and the height value of the current position of the print head 300 is determined according to the rotation angle of the drive motor and the initial height value of the print head 300; multiple points of contact are performed on the heated bed plate 110 in this way, and the height values of each point on the plane of the heated bed plate 110 are obtained.
  • the controller controls the distance that the print head 300 moves toward the heated bed plate 110 according to the obtained height value information of each position of the heated bed plate 110, so that the distance between the nozzle on the print head 300 and the heated bed plate 110 is the preset distance, thereby realizing the automatic leveling operation.
  • Figure 3 is an enlarged view of Figure 2.
  • one end of the cantilever member 130 is connected to the support plate 120, and the other end is suspended in the air, and the hot bed plate 110 is connected to the end of the cantilever member 130 close to the suspension.
  • the support plate 120 is connected to the heated bed plate 110 through the cantilever 130 to support the heated bed plate 110.
  • the heated bed plate 110 is connected to the end of the cantilever 130 that is close to the suspension.
  • the torque of other areas of the cantilever 130 increases, thereby increasing the deformation of the cantilever 130, so that the sensor 200 can sense the deformation more accurately, so that when the print head 300 just abuts against the heated bed plate 110, the sensor 200 can be triggered more accurately and sensitively, thereby improving the leveling accuracy.
  • the senor 200 is connected to an end of the cantilever 130 away from the suspension.
  • the heated bed plate 110 will transmit a certain force to the cantilever 130, and the heated bed plate 110 is connected to the end of the cantilever 130 close to the suspension, and the end of the cantilever 130 away from the suspension is subjected to the largest torque and the largest degree of deformation.
  • the sensor 200 is connected to the end of the cantilever 130 away from the suspension, so that the sensor 200 can sense the deformation more accurately and sensitively, so that when the print head 300 just abuts against the heated bed plate 110, the sensor 200 can be triggered more accurately and sensitively, thereby improving the leveling accuracy.
  • a “U”-shaped through hole 140 is provided on the support plate 120 , and the support plate 120 is surrounded by an area within the through hole 140 to form a cantilever member 130 .
  • the cantilever 130 is in the shape of a long strip, so that it is easier to deform, and the cantilever 130 and the support plate 120 are integrally formed, so as to improve the stability of the cantilever 130, so that when the cantilever 130 is subjected to the pressure transmitted by the hot bed plate 110, It can stably deform, thereby triggering the sensor 200 and improving the leveling accuracy.
  • the senor 200 is disposed on a side of the cantilever 130 away from the heated bed plate 110 .
  • the hot bed plate 110 needs to be heated and maintained at a certain temperature.
  • the setting of the sensor 200 on the side of the cantilever 130 away from the hot bed plate 110 can reduce the interference of temperature on the sensor 200, improve the accuracy of the sensor 200, and thereby improve the leveling accuracy.
  • each cantilever member 130 there are four cantilever members 130 , which are respectively disposed on the support plate 120 at areas corresponding to the four corners of the hot bed plate 110 .
  • a sensor 200 is provided on each cantilever member 130 .
  • the sensor 200 may be a full-bridge strain gauge or a half-bridge strain gauge. In this embodiment, a full-bridge strain gauge is used.
  • each cantilever member 130 is provided with a strain gauge. When any strain gauge detects deformation, it can be triggered, thereby improving the leveling accuracy.
  • FIG. 4 is a partial exploded view of a hot bed leveling device provided in one embodiment of the present application.
  • the hot bed leveling device further includes a connecting rod 410 and a fastener 420 , one end of the connecting rod 410 is connected to the hot bed plate 110 , and the other end is passed through the cantilever 130 , and the fastener 420 is connected to one end of the connecting rod 410 passing through the cantilever 130 , and abuts against the cantilever 130 .
  • the fastener 420 is threadedly connected to the connecting rod 410, and the fastener 420 abuts against one end of the cantilever 130 away from the hot bed plate 110, so that the hot bed plate 110 and the cantilever 130 are stably connected, so that when the print head 300 abuts against the hot bed plate 110, the hot bed plate 110 can accurately transmit the pressure to the cantilever 130, so that the cantilever 130 is deformed to trigger the sensor 200.
  • the connecting rod 410 can be a bolt
  • the fastener 420 can be a nut.
  • the cantilever member 130 further includes an isolation column 430 .
  • the isolation column 430 is sleeved on the connecting rod 410 and disposed between the heated bed plate 110 and the cantilever member 130 .
  • the isolation column 430 is disposed so that the heated bed plate 110 and the support plate 120 are spaced apart from each other, thereby reducing the heat transferred from the heated bed plate 110 to the slider, reducing interference to the sensor 200 , and improving the accuracy of the sensor 200 .
  • the heated bed leveling device further includes a support seat 440 , the support plate 120 is connected to the support seat 440 , and in a direction perpendicular to the heated bed plate 110 , a projected edge of the cantilever member 130 is located outside the projected edge of the support seat 440 .
  • the projection edge of the cantilever 130 is located outside the projection edge of the support seat 440, so that the support seat 440 can avoid the cantilever 130 while supporting the support plate 120, thereby reducing the damage caused by the deformation of the cantilever 130. interference.
  • two sides of the support plate 120 have notches 121 , so as to save materials.
  • an embodiment of the present application further provides a 3D printing device, including the above-mentioned hot bed leveling device.
  • the 3D printing device also includes a controller and a drive motor.
  • the drive assembly and the sensor 200 are both electrically connected to the controller.
  • the drive motor is used to drive the print head 300 to move toward the hot bed plate 110.
  • the sensor 200 is triggered.
  • the sensor 200 can send information to the controller, so that the controller controls the drive motor to stop moving, and determines the height value of the current position of the print head 300 according to the rotation angle of the drive motor and the initial height value of the print head 300.
  • the controller controls the distance that the print head 300 moves toward the hot bed plate 110 according to the height value information of each position of the hot bed plate 110 obtained, and realizes the automatic leveling operation.
  • the strength of the nozzle and the stability of printing are improved, thereby improving the printing quality.

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Abstract

本申请涉及一种热床调平装置及3D打印设备。热床调平装置包括热床组件(100)、传感器(200)及打印头(300)；热床组件(100)包括热床板(110)和支撑板(120)，支撑板(120)上设有悬臂件(130)，热床板(110)连接于悬臂件(130)；传感器(200)设置于悬臂件(130)上，并用于检测悬臂件(130)的形变量；打印头(300)位于热床板(110)背离支撑板(120)的一侧，打印头(300)与热床板(110)能够相对移动，打印头(300)用于与热床板(110)的不同位置交替抵接；打印头(300)抵接于热床板(110)时，悬臂件(130)会发生形变，以触发传感器(200)。

Description

热床调平装置及3D打印设备
相关申请
本申请要求2022年10月21日申请的，申请号为202222783254.8，名称为“热床调平装置及3D打印设备”的中国专利申请的优先权，在此将其全文引入作为参考。
技术领域
本申请涉及3D打印技术领域，特别是涉及热床调平装置及3D打印设备。
背景技术
在计算机数字技术智能化的推动下3D打印技术应用的领域越来越广，特别是FDM热熔技术，越来越受到DIY(Do It Yourself，自己动手)爱好者的青睐。3D打印设备的调平一直是用户的使用难点，一键自动调平正逐渐成为3D打印设备的标配功能模块，传统技术中，常通过在打印头上增加应变片进行调平。然而，打印头上应变片的设置，会影响喷头的强度和稳定性，影响打印质量。
发明内容
根据本申请的各种实施例，提供一种热床调平装置。
一种热床调平装置，包括热床组件，包括热床板和支撑板，所述支撑板上设有悬臂件，所述热床板连接于所述悬臂件；
传感器，设置于所述悬臂件上，并用于检测所述悬臂件的形变量；
打印头，位于所述热床板背离所述支撑板的一侧，所述打印头与所述热床板能够相对移动，所述打印头用于与所述热床板的不同位置交替抵接；
所述打印头抵接于所述热床板时，所述悬臂件会发生形变，以触发所述传感器。
在其中一个实施例中，所述悬臂件的一端连接于所述支撑板，另一端悬空设置，所述热床板连接于所述悬臂件靠近悬空的一端。
在其中一个实施例中，所述传感器连接于所述悬臂件远离所述悬空的一端。
在其中一个实施例中，在所述支撑板上设有“U”型贯穿孔，所述支撑板被围设于所述贯穿孔内的区域形成所述悬臂件。
在其中一个实施例中，所述传感器设置于所述悬臂件背离所述热床板的一侧。
在其中一个实施例中，所述悬臂件的数量为四个，分别设置于所述支撑板上与所述热床板的四角处对应的区域，各所述悬臂件上均设有一个所述传感器。
在其中一个实施例中，所述热床调平装置还包括连接杆和紧固件，所述连接杆的一端连接于所述热床板，另一端穿设于所述悬臂件，所述紧固件连接于所述连接杆穿过所述悬臂件的一端，且与所述悬臂件抵接。
在其中一个实施例中，所述悬臂件还包括隔离柱，所述隔离柱套设于所述连接杆，且设置于所述热床板和所述悬臂件之间。
在其中一个实施例中，所述热床调平装置还包括支撑座，所述支撑板与所述支撑座连接，在垂直于所述热床板的方向上，所述悬臂件的投影边缘位于所述支撑座的投影边缘之外。
本申请还提供一种3D打印设备，能够解决上述至少一个技术问题。
一种3D打印设备，包括上述的热床调平装置。
本申请的一个或多个实施例的细节在下面的附图和描述中提出。本申请的其他特征、目的和优点将从说明书、附图以及权利要求书变得明显。
附图说明
为了更清楚地说明本申请实施例或传统技术中的技术方案，下面将对实施例或传统技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据公开的附图获得其他的附图。
图1为根据本申请一些实施例的热床调平装置的主视图；
图2为根据本申请一些实施例的热床调平装置中热床组件与传感器配合的示意图；
图3为图2中的放大图；
图4为根据本申请一些实施例的热床调平装置的部分爆炸图。
附图标号：
100-热床组件；110-热床板；120-支撑板；121-缺口；130-悬臂件；140-贯穿孔；
200-传感器；300-打印头；410-连接杆；420-紧固件；430-隔离柱；440-支撑座。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基 于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
在本申请的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”、“顺时针”、“逆时针”、“轴向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。在本申请的描述中，“多个”的含义是至少两个，例如两个，三个等，除非另有明确具体的限定。
在本申请中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系，除非另有明确的限定。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
在本申请中，除非另有明确的规定和限定，第一特征在第二特征“上”或“下”可以是第一和第二特征直接接触，或第一和第二特征通过中间媒介间接接触。而且，第一特征在第二特征“之上”、“上方”和“上面”可是第一特征在第二特征正上方或斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”可以是第一特征在第二特征正下方或斜下方，或仅仅表示第一特征水平高度小于第二特征。
需要说明的是，当元件被称为“固定于”或“设置于”另一个元件，它可以直接在另一个元件上或者也可以存在居中的元件。当一个元件被认为是“连接”另一个元件，它可以是直接连接到另一个元件或者可能同时存在居中元件。本文所使用的术语“垂直的”、“水平的”、“上”、“下”、“左”、“右”以及类似的表述只是为了说明的目的，并不表示是唯一的实施方式。
参阅图1和图2，图1为本申请一实施例提供的热床调平装置的主视图；图2为本申请一实施例提供的热床调平装置中热床组件与传感器配合的示意图。本申请一实施例提供了的热床调平装置，包括热床组件100、传感器200及打印头300；热床组件100包括 热床板110和支撑板120，支撑板120上设有悬臂件130，热床板110连接于悬臂件130；传感器200设置于悬臂件130上，并用于检测悬臂件130的形变量；打印头300位于热床板110背离支撑板120的一侧，打印头300与热床板110能够相对移动，打印头300用于与热床板110的不同位置交替抵接；打印头300抵接于热床板110时，悬臂件130会发生形变，以触发传感器200。
本申请中的热床调平装置应用于3D打印设备，打印头300用于朝向热床板110挤出耗材以形成打印模型，为保证打印模型的质量，需要进行调平处理。3D打印设备还包括控制器和驱动电机，驱动电机和传感器200均与控制器电性连接，驱动电机用于驱动打印头300朝向热床板110移动，当打印头300抵接于热床板110时，传感器200触发，从而向控制器发送信息，使得控制器控制驱动电机停止运动，并获得打印头300当前位置的高度值。
具体地，本申请中通过打印头300与热床板110能够相对移动，使得打印头300能够与热床板110的不同位置交替抵接，而打印平台通过悬臂件130与支撑板120连接，从而能够传递打印头300施加给打印平台的压力，使得悬臂件130发生形变，从而触发传感器200，获得打印头300当前位置信息，从而能够获取热床板110上用于接触喷头的各点的高度值，在打印时通过软件自动补偿热床板110的高度误差(为传统技术，故不再详细赘述)，从而实现热床调平，相较于传统技术中在打印喷头上安装应变片进行调平的方案而言，本申请中将调平集成在热床组件100上，提高了喷头的强度和打印的稳定性，进而提高了打印质量。其中，悬臂件130的设置，使得在热床板110承受打印头300的压力的作用下，悬臂件130容易发生形变，使得传感器200能够准确感应到形变，从而在打印头300刚好抵接于热床板110时，能够更加准确、灵敏地触发，从而提高调平精度。
需要说明的是，本实施例中，打印头300抵接热床板110时，指的是打印头300刚好触碰到热床板110，并非挤压热床板110，则热床板110并不会因为打印头300的触碰而发生明显变形；可以理解的，此时，热床板110发生微观变形，由此可认为热床板110几乎不发生位移，这样，在打印头300抵接热床板110后不需要额外换算热床板110的位移，就可以根据获取打印头300的位置，从而获取热床板110与打印头300接触位置的高度值。
还需要说明的是，当打印头300接触热床板110，悬臂件130发生形变时，传感器200能够检测到该形变，当传感器200检测到悬臂件130的形变量大于预设阈值时，传感器200得以触发，以发出打印头300刚好接触热床板110的信号，这样，调平时，当传感器200得以触发时，说明打印头300刚好接触热床板110。
其中，传感器200为应变片，当悬臂件130发生形变时，应变片也会发生形变，应变片的电阻值随之发生变化，通过应变片自身的控制电路将电阻变化转变为电压变化，并输送至控制器。
调平工作中，滑块板通过悬臂件130支撑热床板110，打印头300从初始高度朝向热床板110向下移动以与热床板110上不同位置接触，当打印头300抵接于热床板110时，热床板110受到的压力会通过传导至悬臂件130上，悬臂件130产生微弱的形变，此时通过传感器200检测该形变量，当该形变量大于预设阈值时，传感器200触发，向控制器发送信息，使得控制器控制驱动电机停止运动，从而使得打印头300停止动作，并根据驱动电机的转动角度及打印头300的初始高度值，判断出打印头300当前位置的高度值；如此循环在热床板110上进行多点接触，得到热床板110平面各点的高度值，在打印时，控制器根据获得的热床板110各个位置的高度值信息，控制打印头300朝向热床板110移动的距离，使得打印头300上的喷嘴与热床板110之间的距离为预设距离，从而实现自动调平操作。
参阅图2和图3，图3为图2中的放大图。在其中一个实施例中，悬臂件130的一端连接于支撑板120，另一端悬空设置，热床板110连接于悬臂件130靠近悬空的一端。
具体地，支撑板120通过悬臂件130与热床板110连接，实现对热床板110的支撑。而热床板110连接于悬臂件130靠近悬空的一端，则当热床板110在承受打印头300的压力的作用下，使得悬臂件130其他区域的转矩增大，从而使得悬臂件130的形变增大，便于传感器200能够更加准确的感应到形变，从而在打印头300刚好抵接于热床板110时，传感器200能够更加准确、灵敏地触发，从而提高调平精度。
继续参阅图3，在其中一个实施例中，传感器200连接于悬臂件130远离悬空的一端。
具体地，当打印头300抵接于热床板110时，热床板110会传递给悬臂件130一定的作用力，而热床板110连接于悬臂件130靠近悬空的一端，则悬臂件130远离悬空的一端受到的转矩最大，形变程度也最大，则传感器200连接于悬臂件130远离悬空的一端的设置，使得传感器200能够更加准确、灵敏地感应到形变，从而在打印头300刚好抵接于热床板110时，传感器200能够更加准确、灵敏地触发，从而提高调平精度。
参阅图3，在其中一个实施例中，在支撑板120上设有“U”型贯穿孔140，支撑板120被围设于贯穿孔140内的区域形成悬臂件130。
具体地，悬臂件130为长条状，从而更容易形变，而悬臂件130与支撑板120一体成型，从而提高悬臂件130的稳定性，使得悬臂件130在受到热床板110传递的压力时， 能够稳定的发生形变，从而触发传感器200，提高调平精度。
参阅图1和图2，在其中一个实施例中，传感器200设置于悬臂件130背离热床板110的一侧。
具体地，为避免热床板110上的耗材收缩，热床板110需要被加热并保持一定的温度，而传感器200位于悬臂件130背离热床板110的一侧的设置，能够减少温度对传感器200的干扰，提高传感器200的准确度，进而提高调平精度。
参阅图2，在其中一个实施例中，悬臂件130的数量为四个，分别设置于支撑板120上与热床板110的四角处对应的区域，各悬臂件130上均设有一个传感器200，传感器200可选用全桥应变片或半桥应变片，在本实施例中采用全桥应变片。
具体地，通过将四个悬臂件130设置于支撑板120上与热床板110的四角对应的区域上，从而能够稳定的支撑热床组件100，同时，各悬臂件130上均设有一个应变片的设置，则当任意一个应变片检测到形变时，均能够触发，从而提高了调平精度。
参阅图1、图3及图4，图4为本申请一实施例提供的热床调平装置的部分爆炸图。在其中一个实施例中，热床调平装置还包括连接杆410和紧固件420，连接杆410的一端连接于热床板110，另一端穿设于悬臂件130，紧固件420连接于连接杆410穿过悬臂件130的一端，且与悬臂件130抵接。
具体地，紧固件420与连接杆410螺纹连接，通过紧固件420抵接于悬臂件130背离热床板110的一端，从而使得热床板110与悬臂件130稳定连接，便于打印头300抵接热床板110时，热床板110能够准确地将压力传递至悬臂件130上，使得悬臂件130发生形变，以触发传感器200。同时，便于热床板110与滑动板的拆卸连接，组装方便。连接杆410可以为螺栓，紧固件420可以为螺母。
参阅图1和图4，在其中一个实施例中，悬臂件130还包括隔离柱430，隔离柱430套设于连接杆410，且设置于热床板110和悬臂件130之间。
具体地，隔离柱430的设置，使得热床板110与支撑板120间隔设置，从而能够减少热床板110传递至滑块上的热量，减少对传感器200的干扰，提高传感器200的准确度。
参阅图1，在其中一个实施例中，热床调平装置还包括支撑座440，支撑板120与支撑座440连接，在垂直于热床板110的方向上，悬臂件130的投影边缘位于支撑座440的投影边缘之外。
具体地，悬臂件130的投影边缘位于支撑座440的投影边缘之外，则支撑座440在支持支撑板120的同时，能够避让悬臂件130，从而减少对悬臂件130发生形变时造成 干扰。
参阅图4，在其中一个实施例中，支撑板120的两侧具有缺口121，从而能够节省材料。
参阅图1、图2及图3，本申请一实施例还提供一种3D打印设备，包括上述的热床调平装置。
具体地，3D打印设备还包括控制器和驱动电机，驱动组件与传感器200均与控制器电性连接，驱动电机用于驱动打印头300朝向热床板110移动，当打印头300抵接于热床板110时，传感器200触发，传感器200能够向控制器发送信息，使得控制器控制驱动电机停止运动，并根据驱动电机的转动角度及打印头300的初始高度值，判断出打印头300当前位置的高度值。打印时，控制器根据获得的热床板110各个位置的高度值信息，控制打印头300朝向热床板110移动的距离，实现自动调平操作，相较于传统技术中在打印喷头上安装应变片进行调平的方案而言，提高了喷头的强度和打印的稳定性，进而提高了打印质量。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本申请的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对申请专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干变形和改进，这些都属于本申请的保护范围。因此，本申请专利的保护范围应以所附权利要求为准。

Claims (10)

  1. 一种热床调平装置，其特征在于，所述热床调平装置包括：
    热床组件，包括热床板和支撑板，所述支撑板上设有悬臂件，所述热床板连接于所述悬臂件；
    传感器，设置于所述悬臂件上，并用于检测所述悬臂件的形变量；及
    打印头，位于所述热床板背离所述支撑板的一侧，所述打印头与所述热床板能够相对移动，所述打印头用于与所述热床板的不同位置交替抵接；
    所述打印头抵接于所述热床板时，所述悬臂件会发生形变，以触发所述传感器。
  2. 根据权利要求1所述的热床调平装置，其特征在于，所述悬臂件的一端连接于所述支撑板，另一端悬空设置，所述热床板连接于所述悬臂件靠近悬空的一端。
  3. 根据权利要求2所述的热床调平装置，其特征在于，所述传感器连接于所述悬臂件远离所述悬空的一端。
  4. 根据权利要求2所述的热床调平装置，其特征在于，在所述支撑板上设有“U”型贯穿孔，所述支撑板被围设于所述贯穿孔内的区域形成所述悬臂件。
  5. 根据权利要求1所述的热床调平装置，其特征在于，所述传感器设置于所述悬臂件背离所述热床板的一侧。
  6. 根据权利要求1-5任一项所述的热床调平装置，其特征在于，所述悬臂件的数量为四个，分别设置于所述支撑板上与所述热床板的四角处对应的区域，各所述悬臂件上均设有一个所述传感器。
  7. 根据权利要求1-5任一项所述的热床调平装置，其特征在于，所述热床调平装置还包括连接杆和紧固件，所述连接杆的一端连接于所述热床板，另一端穿设于所述悬臂件，所述紧固件连接于所述连接杆穿过所述悬臂件的一端，且与所述悬臂件抵接。
  8. 根据权利要求7所述的热床调平装置，其特征在于，所述悬臂件还包括隔离柱，所述隔离柱套设于所述连接杆，且设置于所述热床板和所述悬臂件之间。
  9. 根据权利要求1-5任一项所述的热床调平装置，其特征在于，所述热床调平装置还包括支撑座，所述支撑板与所述支撑座连接，在垂直于所述热床板的方向上，所述悬臂件的投影边缘位于所述支撑座的投影边缘之外。
  10. 一种3D打印设备，其特征在于，包括权利要求1-9任一项所述的热床调平装置。
PCT/CN2023/101396 2022-10-21 2023-06-20 热床调平装置及3d打印设备 WO2024082666A1 (zh)

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