WO2024060772A1

WO2024060772A1 - Touch apparatus, contact pin, three-dimensional forming device and printing control method

Info

Publication number: WO2024060772A1
Application number: PCT/CN2023/104583
Authority: WO
Inventors: 王敬杰; 唐亮; 周承立
Original assignee: 深圳市纵维立方科技有限公司
Priority date: 2022-09-21
Filing date: 2023-06-30
Publication date: 2024-03-28
Also published as: CN117774309A

Abstract

Disclosed in the present invention is a touch apparatus, a contact pin, a three-dimensional forming device and a printing control method. A pressing piece is pushed by means of a nozzle, such that the conduction state of a conductive piece and the contact pin is changed, the height of the nozzle is obtained, so as to obtain the offset of the nozzle and a leveling apparatus, and thereby achieving automatic leveling.

Description

Touch device, stylus, three-dimensional molding equipment and printing control method

Technical field

The present invention relates to the technical field of 3D printing, and in particular to a touch device, a stylus, a three-dimensional molding equipment and a printing control method.

Background technique

Three-dimensional molding equipment, also known as three-dimensional printer (3DP), is an additive manufacturing technology. The principle of three-dimensional molding equipment is to put data and raw materials into the three-dimensional molding equipment, and the guide device drives the print head to spray layer by layer according to the model contour to achieve three-dimensional printing. The stable adhesion of the first layer of the model to the printing platform is the basis for successful subsequent printing. The initial relative distance between the nozzle and the printing platform plays an important role in the formation of the first layer of the model.

In the prior art, a leveling device located on one side of the nozzle is usually used to detect the height of the printing platform. For example, in the patent with publication number CN216127742U, a leveling device is connected to the printing nozzle, and the printing platform pushes the stylus up. The upper end is in contact with the metal shrapnel, and the metal shrapnel is in contact with the probe point on the circuit board, forming a reflow circuit and generating a signal to obtain the height of the printing platform. However, since the height of the printing platform is obtained by the leveling device, it is necessary to compensate the actual position of the nozzle based on the height difference between the stylus and the nozzle. However, errors will occur during the installation of the nozzle and the leveling device, causing the stylus and the nozzle to The height difference cannot be accurately obtained, and the height difference between the leveling device and the nozzle of different three-dimensional molding equipment may be different. It is necessary to manually adjust the distance between the bottom of the nozzle and the upper surface of the printing platform before starting printing, and manually determine the height of the nozzle and stylus. The offset between them makes it impossible to achieve automatic leveling.

Contents of the invention

In view of this, embodiments of the present invention provide a touch device, a stylus, a three-dimensional molding equipment and a printing control method to solve the problem that the three-dimensional molding equipment cannot automatically level.

In order to achieve the above objectives, the present invention mainly provides the following technical solutions:

On the one hand, the present invention provides a touch device for use in three-dimensional molding equipment. The touch device includes: a connecting device, a pressing member, a first conductive device and a second conductive device. The pressing member cooperates with the connecting device to move relative to the connecting device driven by an external force; the first conductive device is connected to the connecting device; the second conductive device is connected to the pressing member, and the movement of the pressing member relative to the connecting device at least includes a conduction position and a disconnection position , in the on position, the second conductive device is in electrical contact with the first conductive device; in the off position, the second conductive device is out of electrical contact with the first conductive device.

In another aspect, the present invention provides a three-dimensional molding equipment, including the touch device or touch pin described in this application.

In another aspect, the present invention also provides a printing control method, which includes: controlling the nozzle of the print head assembly to push the pressing member to generate a detection signal; obtaining the first height information of the print head assembly according to the detection signal; and controlling the leveling device to sense The preset point of the molding platform to generate a leveling signal; wherein the static height of the pressing member is set to be the same as the height of the preset point; the second height information of the print head assembly is obtained according to the leveling signal; according to the first The height information and the second height information determine the offset of the nozzle relative to the leveling device; the printing height of the print head assembly is determined based on the offset.

The stylus, the touch device, the printing control method and the three-dimensional molding equipment proposed by the embodiments of the present invention are provided with a movable pressing member. When the bottom end of the nozzle pushes the pressing member, the electrical current between the first conductive device and the second conductive device is changed. Sexual contact status, the nozzle height can be obtained for leveling.

A leveling signal is generated based on the leveling device contacting the preset point, the height of the leveling device is obtained, and then the offset between the nozzle and the leveling device is obtained. The printing height of the nozzle is determined based on the offset to achieve automatic leveling. In the existing technology, errors will occur when the nozzle and leveling device are installed, resulting in the height difference between the stylus and the nozzle being unable to be accurately obtained. It is necessary to manually adjust the distance between the bottom of the nozzle and the upper surface of the printing platform before starting printing, and manually determine the distance between the nozzle and the printing platform. The offset between the stylus heights prevents automatic leveling. Compared with the prior art, in this application document, the touch device is connected to the three-dimensional molding equipment, and the top surface of the pressing member is in the same plane as the preset point on the upper surface of the forming platform of the three-dimensional molding equipment. First, the nozzle is The bottom end of the leveling device pushes the pressing member. When the pressing member generates a detection signal, the first height information of the print head assembly is obtained, and then the bottom end of the leveling device contacts the preset point of the forming platform. When the leveling device generates a leveling signal When, obtain the second height information of the print head assembly, determine the offset of the nozzle relative to the leveling device based on the first height information and the second height information, and then perform leveling detection through the leveling device, based on the platform height information and offset The printing height of the print head assembly is controlled quantitatively, eliminating the need to manually adjust the initial position of the nozzle and the printing platform to achieve automatic leveling.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a schematic structural diagram of a first contact pin provided by an embodiment of the present invention;

Figure 2 is a schematic structural diagram of a second contact pin provided by an embodiment of the present invention;

Figure 3 is a schematic structural diagram of a third contact pin provided by an embodiment of the present invention;

Figure 4 is a schematic three-dimensional structural diagram of a touch device provided by an embodiment of the present invention;

Figure 5 is a schematic cross-sectional structural diagram of a touch device provided by an embodiment of the present invention;

Figure 6 is a schematic diagram of the explosion structure of a touch device provided by an embodiment of the present invention;

Figure 7 is a schematic structural diagram of the second substrate and contact pins in a touch device provided by an embodiment of the present invention;

Figure 8 is a schematic structural diagram of a conductive member in a touch device provided by an embodiment of the present invention;

Figure 9 is a schematic structural diagram of another touch device provided by an embodiment of the present invention from a first perspective;

Figure 10 is a schematic structural diagram of another touch device provided by an embodiment of the present invention from a second perspective;

Figure 11 is a schematic diagram of the explosion structure of another touch device provided by an embodiment of the present invention;

Figure 12 is a schematic cross-sectional structural diagram from a first perspective of another touch device provided by an embodiment of the present invention;

FIG13 is a schematic cross-sectional view of another touch device provided by an embodiment of the present invention at a second viewing angle;

Figure 14 is a schematic cross-sectional structural diagram of yet another touch device provided by an embodiment of the present invention from a third perspective;

FIG15 is a schematic structural diagram of a stereoscopic molding device provided by an embodiment of the present invention at a first viewing angle;

Figure 16 is a schematic structural diagram of a three-dimensional molding equipment provided by an embodiment of the present invention from a second perspective;

Figure 17 is a schematic structural diagram of a three-dimensional molding equipment provided by an embodiment of the present invention from a third perspective;

FIG18 is a partial enlarged structural schematic diagram of area A in the three-dimensional molding device shown in FIG17;

Figure 19 is a schematic structural diagram of a three-dimensional molding equipment provided by an embodiment of the present invention from a fourth perspective;

Figure 20 is a partially enlarged structural schematic diagram of area B in the three-dimensional molding equipment shown in Figure 19;

Figure 21 is a flow chart of a printing control method provided by an embodiment of the present invention.

Detailed ways

In order to further elaborate on the technical means and effects adopted by the present invention to achieve the intended inventive purpose, the specific implementation, structure, characteristics and effects of the touch device proposed according to the present invention are described below in conjunction with the drawings and preferred embodiments. , detailed description is as follows.

On the one hand, as shown in Figures 1-3, an embodiment of the present invention provides a contact pin 100, which is used in a touch device 1000 for leveling. The contact pin 100 is used to electrically contact the conductive part. The contact pin 100 includes a main body 101 and an end. The end is provided at one axial end of the main body 101. The end includes an outer peripheral surface 110 and a vertex 120 located on the outer peripheral surface 110; the contact pin 100 communicates with the conductive portion through the vertex 120. point contact, To be electrically connected with the conductive part.

Wherein, the cross-sectional area of the end head may gradually decrease in the direction approaching the vertex 120 . The conductive part can be of various types depending on the application scenarios of the stylus 100. For example, the conductive part can be a gasket or a contact made of conductive material. The stylus 100 is made of conductive material, such as copper or aluminum. During use, a voltage is applied to both ends of the conductive part and the contact pin 100 respectively. When the contact pin 100 contacts the conductive part through the vertex 120, the contact pin 100 and the conductive part are electrically connected to generate a current. When the contact pin 100 reaches the vertex 120 When separated from the conductive part, the current disappears. By detecting the presence or absence of the current, the relative position of the stylus 100 and the conductive part can be detected. The stylus 100 includes a main body 101 and an end. The main body 101 plays a role of supporting and extending. The main body 101 can be in various shapes. For example, the main body is cylindrical and includes both axial ends. The cross-section of the main body 101 can be uniform in the axial direction, or as shown in Figures 1 to 3, the cross-sectional area of the main body 101 at one end connected to the end is larger than the cross-sectional area at the other end opposite to the end, ensuring that the end While the cross-sectional area is sufficient, the weight and space occupied of the main body 101 are reduced. The end is disposed at one axial end of the main body 101. In one embodiment, in order to ensure that the contact pin 100 is evenly stressed, the end is coaxially disposed with the main body 101. In order to improve the sensitivity of the stylus 100, the tip is in point contact with the conductive part through the vertex 120, so that the tip can be separated from the conductive part when it is slightly away from the conductive part, and the tip area can be avoided to be too large to be between the conductive part and the conductive part. The surface contact forms a capacitance, which prevents the contact pin 100 from having to move a certain distance before being electrically disconnected from the conductive part, so that the terminal can be electrically disconnected from the conductive part by physical separation.

The outer peripheral surface 110 is the outer surface of the end, and the end is surrounded by the outer peripheral surface 110, as shown in Figure 1. The outer peripheral surface 110 can be a spherical surface, and the outer peripheral surface 110 is easy to process and has good stability; or, as shown in Figure 2, The outer peripheral surface 110 is a tapered surface, which makes the points around the vertex 120 further away from the conductive part, increases the accuracy and strength of the contact pin 100, and avoids electrical connection between the points around the vertex and the conductive part; or, as shown in Figure 3 As shown, the outer peripheral surface 110 is a cone surface, with a plurality of depressions 130 distributed in the circumferential direction of the cone surface, and the depressions 130 extend to the apex 120 in the direction of the cone surface's generatrix, which further ensures the structural strength of the contact pin 100 while further making the top point 120 . Points around point 120 are further away from the conductive portion, making apex 120 more prominent and increasing the sensitivity of the stylus.

On the other hand, as shown in Figures 4-6, the embodiment of the present invention also provides a touch device 1000 for use in three-dimensional molding equipment. The touch device 1000 includes a connection device 200, a pressing member 300, a first conductive device and a The second conductive device, wherein: the connection device 200, can be used to connect with the three-dimensional molding equipment, such as direct connection or indirect connection through other components. The pressing member 300 cooperates with the connecting device 200 to move relative to the connecting device 200 driven by external force. Specifically, the pressing member 300 can be slidably connected with the connecting device 200. The first conductive device is connected to the connecting device 200; the second conductive device is connected to the pressing member 300, and the pressing member 300 moves relative to the connecting device 200 including at least the conducting position and the disconnecting position. In the conducting position, the second The conductive device is in electrical contact with the first conductive device. When in the disconnected position, the second conductive device is out of electrical contact with the first conductive device to generate a detection signal.

Wherein, if the second conductive device is in electrical contact with the first conductive device, current can pass between the second conductive device and the first conductive device, thereby achieving electrical conduction. The triggering method of the off position is not limited, for example, the pressing member 300 is touched by the nozzle or the leveling device of the three-dimensional molding equipment to be in the off position.

The specific structure of the first conductive device and the second conductive device is not limited. For example, they can be two conductive sheets in contact with each other. The embodiment of the present application is illustrated by taking one of the first conductive device and the second conductive device as a conductive member 400 and the other as a contact pin 100. If the conductive member 400 is connected to the connecting device 200, the contact pin 100 is connected to the pressing member 300, and if the conductive member 400 is connected to the pressing member 300, the contact pin 100 is connected to the connecting device 200.

In this embodiment, the conductive member 400 is connected to the connection device 200 and the contact pin 100 is connected to the pressing member 300 for description, but this solution is not limited. The structure of the sliding connection between the pressing member 300 and the connecting device 200 is not limited. Such as the structure of chute and slide rail, such as the structure of pulley and slide rail, etc. In this embodiment, the connecting device 200 is provided with a chute 210; the pressing member 300 is disposed in the chute 210. Give examples.

The conductive member 400 is connected to the connection device 200, and when the contact pin 100 is connected to the pressing member 300, the conductive member 400 can be used to electrically connect with the control device of the three-dimensional molding equipment. The contact pin 100 is connected to the pressing member 300. The pressing member 300 includes a conduction position and a disconnection position. In the conduction position, the contact pin 100 is in electrical contact with the conductive member 400 and is electrically conductive. The pressing member 300 is When the nozzle or the leveling device of the three-dimensional molding equipment is touched to be in the disconnection position, the contact pin 100 is electrically disconnected from the conductive member 400 to generate a detection signal.

The contact pin 100 may be the aforementioned contact pin, and the conductive member 400 may be the aforementioned conductive part. The pressing member 300 can be installed at multiple positions of the three-dimensional forming equipment, such as the base 40 or the guide frame 50 . In one embodiment, the pressing member 300 is connected to the forming platform 30 . The chute 210 is a vertically extending groove with a top opening at the top of the connecting device 200. The pressing member 300 includes an opposite top surface and a bottom end. The pressing member 300 is movably connected to the chute 210 from the bottom end. The surface is located outside the top opening of the chute 210, and the bottom end of the pressing member 300 is spaced a certain distance from the bottom of the chute 210, so that the pressing member 300 can move in the vertical direction. Adjust the overall installation position of the touch device 1000 so that when the pressing member 300 is in the conductive position, the top surface of the pressing member 300 and the preset point on the upper surface of the forming platform 30 are in the same plane. When the touching device 1000 is fixed, A tool with a flat surface, such as a square metal plate or wooden board, can be used. The flat surface of the tool contacts the upper surface of the forming platform 30 and the preset point, and at the same time, the top surface of the pressing member 300 contacts the flat surface of the tool to fix it. Touch the device 1000 so that the top surface and the preset point are in the same plane. The fact that the top surface and the preset point are in the same plane can be understood to mean that the top surface and the preset point are at the same height during printing.

When in use, voltage is applied to the stylus 100 and the conductive member 400 respectively, and the stylus 100 and the conductive member 400 are electrically connected to the control device of the three-dimensional molding equipment. The pressing member 300 in the natural state will be in the conducting position, that is, the stylus 100 and the conductive member 400 are in contact and electrically connected, and a continuous current signal can be obtained. When the nozzle 10 drops to the top surface of the contact pressing member 300, it starts to push the pressing member 300 down, and the top 120 of the stylus 100 is separated from the conductive member 400, and the pressing member 300 changes from the conducting position to the disconnecting position, and the current signal stops. The stop signal of the current signal is used as a detection signal, and the control device obtains the first height information of the print head assembly when the detection signal is obtained. Since the top surface and the preset point are in the same plane, and the displacement of the pressing member 300 from the on position to the off position is very small, the first height information can be regarded as the height of the print head assembly when the nozzle 10 touches the preset point, and then the leveling device can be used to sense the preset point, and the second height information of the print head assembly can be obtained according to the leveling signal generated by the leveling device, that is, the height of the print head assembly when the nozzle 10 and the leveling device touch the same point on the forming platform 30 is obtained respectively, and the offset of the nozzle 10 and the leveling device can be obtained by the difference between the first height information and the second height information. Among them, the stylus 100 is in point contact with the conductive member 400, so that the displacement of the pressing member 300 from the on position to the off position is very small, and this displacement does not affect the success rate of the printed model. The preset point is a point on the upper surface of the forming platform 30 close to the touch device 1000. The preset point can be any point, or a detection point when the leveling device performs leveling detection. The preset point can be a detection point closest to the touch device 1000 among the detection points of the leveling device, or a detection point with preset coordinates. The leveling device can be a leveling device in various forms, such as the stylus-type leveling device mentioned in the background technology, or a distance sensor for long-distance measurement.

It can be understood that the disconnection position of the pressing member 300 refers to the position at which the contact pin 100 and the conductive member 400 change from electrical conduction to electrical disconnection. It is the critical position at the moment of electrical disconnection. The pressing member 300 In addition to the on position and the off position, other positions may also be included, for example, the pressing member 300 may continue to move downward from the off position. In addition, the leveling device can be controlled to sense a preset point to generate a detection signal, or the leveling device can be controlled to sense the pressing member 300 to generate a detection signal. The method of controlling the leveling device to sense the preset point or the pressing member 300 may be contact sensing through probe touching or the like, or non-contact sensing through a sensor.

The stylus, the touch device, the printing control method and the three-dimensional molding equipment proposed by the embodiments of the present invention are provided with a movable pressing member. When the bottom end of the nozzle pushes the pressing member, the conduction between the conductive member and the stylus is changed. status, obtain the height of the nozzle, generate a leveling signal based on the leveling device contacting the preset point, obtain the height of the leveling device, and then obtain the offset between the nozzle and the leveling device, determine the printing height of the nozzle based on the offset, and achieve Automatic leveling. In the existing technology, errors will occur when the nozzle and leveling device are installed, resulting in the height difference between the stylus and the nozzle being unable to be accurately obtained. It is necessary to manually adjust the distance between the bottom of the nozzle and the upper surface of the printing platform before starting printing, and manually determine the distance between the nozzle and the printing platform. The offset between the stylus heights prevents automatic leveling. Compared with the prior art, in this application document, the touch device is connected to the three-dimensional molding equipment, and the top surface of the pressing member is in the same plane as the preset point on the upper surface of the forming platform of the three-dimensional molding equipment. First, the nozzle is The bottom end of the leveling device pushes the pressing member. When the pressing member generates a detection signal, the first height information of the print head assembly is obtained, and then the bottom end of the leveling device contacts the preset point of the forming platform. When the leveling device generates a leveling signal When, obtain the second height information of the print head assembly, determine the offset of the nozzle relative to the leveling device based on the first height information and the second height information, and then perform leveling detection through the leveling device, based on the platform height information and offset The printing height of the print head assembly is controlled quantitatively, eliminating the need to manually adjust the initial position of the nozzle and the printing platform to achieve automatic leveling.

In one embodiment, as shown in FIGS. 5-6 , the touch device further includes a first elastic member 500 , which is in direct or indirect contact with the pressing member 300 . The first elastic member 500 is used to push the pressing member 300 toward the pressing member 300 . A force is applied to move the pressing member 300 from the off position to the on position.

Specifically, the first elastic member 500 may be disposed between the pressing member 300 and the connecting device 200 . For example, the first elastic member 500 is disposed between the bottom of the pressing member 300 and the bottom of the sliding groove 210 .

The first elastic member 500 can be a variety of elastic components such as springs and foam. The first elastic member 500 allows the pressing member 300 to remain in the guide position when the pressing member 300 is not pushed by the nozzle 10 or when the thrust of the nozzle 10 disappears. Pass location. In the conduction position, the elastic force of the first elastic member 500 and the pressure of the conductive member 400 on the contact pin 100 reach a force balance. The first elastic member 500 also causes the contact pin 100 to squeeze the conductive member 400 to ensure that the conductive member 400 is in contact with the conductive member 400 . The effect of current stabilization between contact pins 100. It's understandable, and it's okay Without the first elastic member 500 , there can be a certain friction force between the pressing member 300 and the connecting device 200 . The user moves the pressing member 300 so that the contact pin 100 contacts the conductive member 400 to conduct electricity. The pressing member 300 is not subject to external force. , it is sufficient to ensure that the contact pin 100 can still be in contact with the conductive member 400 and conduct electricity.

In one embodiment, as shown in FIG. 5 , at least one mounting hole 310 is provided at one end of the pressing member 300 relative to the bottom of the chute 210 . One end of the first elastic member 500 is inserted into the mounting hole 310 . The other end is connected to the groove wall of the chute 210 .

The number of mounting holes 310 may be two, and the two mounting holes 310 are distributed on both radial sides of the contact pin 100. When the first elastic member 500 is two springs, the springs can be movably inserted into the mounting holes 310, and one end is connected to the mounting hole 310. The bottom surface of the hole 310 is in contact with the groove wall of the chute 210, and the other end is connected with the groove wall of the chute 210. It can be a fixed connection or abutment. For example, the other end of the spring is in contact with the bottom of the chute 210 to ensure that the spring position is stable and will not slide. position and easy to install.

In one embodiment, as shown in FIGS. 4-8 , the pressing member 300 includes a relief hole 320 . The contact pin 100 is disposed in the pressing member 300 . For example, the contact pin 100 passes through the pressing member 300 , and the apex 120 of the contact pin 100 protrudes from the bottom wall of the relief hole 320 . The conductive member 400 includes a first substrate 410 and a first conductive sheet 420. The first substrate 410 is fixedly connected to the connection device 200. The first substrate 410 is at least partially located in the relief hole 320. The pressing member 300 can be relative to the third conductor through the relief hole 320. A substrate 410 is movable, the first conductive sheet 420 is disposed on the first substrate 410 , and the first conductive sheet 420 is located in the relief hole 320 . The contact pin 100 corresponds to the first conductive sheet 420 and is used for contacting or disengaging from the first conductive sheet 420 .

The relief hole 320 has an opening on at least one side of the pressing member 300. The first substrate 410 has a plate-like structure. The height of the relief hole 320 in the vertical direction is higher than the thickness of the first substrate 410, so that the first substrate 410 does not move, and the pressing member 300 can move up and down. The pressing member 300 is processed with a through hole, which passes through the bottom end of the pressing member 300 and the relief hole 320. The contact pin 100 is connected to the through hole and fixed with the pressing member 300. The apex 120 of the contact pin 100 protrudes. on the side wall of the relief hole 320. When the pressing member 300 is in the conductive position, The contact pin 100 abuts the first conductive piece 420 on the first substrate 410, and the contact pin 100 is electrically connected with the first conductive piece 420. When the pressing member 300 moves from the conductive position to the off position, the first substrate 410 moves within the relief hole 320 so that the contact pin 100 is electrically disconnected from the first conductive piece 420 . The arrangement of the relief hole 320 makes the overall structure of the touch device 1000 compact, reducing the volume and weight of the pressing member 300, and the contact pin 100 is connected to the pressing member 300, making the contact pin 100 more stable and preventing the contact pin 100 from shaking.

The relief hole 320 may have various forms. In one embodiment, the relief hole 320 passes through the pressing member 300 , the first substrate 410 passes through the relief hole 320 , and both ends of the first substrate 410 are connected to The device 200 is fixedly connected so that the position of the first substrate 410 is stable and will not move due to the collision of the stylus 100, thus ensuring the sensitivity of the stylus 100.

In another embodiment, the relief hole 320 passes through the pressing member 300 , the relief hole 320 is located in the slide groove 210 , the first base plate 410 passes through the relief hole 320 , and both ends of the first base plate 410 are in contact with the slide groove 210 respectively. The inner wall of 210 is fixedly connected, making the touch device 1000 simple in appearance, and preventing the first conductive piece 420 and the contact pin 100 from being exposed to the environment for a long time and being susceptible to environmental pollution, such as failure by molten resin splashing.

In another embodiment, the relief hole 320 is located in the chute 210. The chute 210 includes a top opening. The connecting device 200 is provided with a mounting notch 211 that passes through the top opening. The first base plate 410 is fixedly connected to the mounting notch 211.

As shown in FIGS. 4 and 6 , the relief hole 320 can pass through the pressing member 300 . The relief hole 320 has openings on both sides of the pressing member 300 in the horizontal direction. There are two installation gaps 211 , which are respectively connected with the two sides of the relief hole 320 . Corresponding to the side opening, a screw hole is provided on the mounting notch 211. As shown in Figure 8, two through holes 430 are provided on the first base plate 410. Two fixing bolts 212 are inserted into the through holes 430 and connected to the screw holes, so that Both ends of the first base plate 410 are fixed to the installation notches 211 to facilitate installation and ensure the stability of the first base plate 410 . In addition, when the first conductive sheet 420 is worn for a long time, there is no need to remove the pressing member 300, and only the first substrate 410 is required to be disassembled, making disassembly and assembly easy.

The first conductive sheet 420 may be disposed at an intermediate position between the two through holes 430 . The first conductive piece 420 can be arranged in a variety of ways, as long as it can be in contact with the contact pin 100 and electrically conductive. The following are three specific arrangements:

First, as shown in FIG. 8 , the first conductive sheet 420 is disposed on the surface of the first substrate 410 opposite to the contact pin 100 . The vertex 120 of the contact pin 100 is used to make point contact with the first conductive sheet 420 . The piece 420 slightly protrudes from the first substrate 410, and the point contact makes the stylus 100 more sensitive.

Second, the first substrate 410 is provided with a groove on one side relative to the contact pin 100. The first conductive piece 420 is provided on the groove wall and extends to the opening edge of the groove. The outer peripheral surface 110 of the contact pin 100 The size is larger than the size of the groove, the vertex 120 of the contact pin 100 is used to extend into the groove, and the outer peripheral surface 110 of the contact pin 100 is used to make line contact with the first conductive sheet 420 .

The apex 120 of the contact pin 100 is not in contact with the groove, and only the outer peripheral surface 110 is in contact with the opening edge of the groove, so that the outer peripheral surface 110 is in line contact with the first conductive sheet 420. Compared with point contact, the stability of line contact is stronger. , if the contact pin 100 is tilted or the position of the pressing member 300 is tilted, the electrical connection between the contact pin 100 and the first conductive piece 420 can still be ensured, and the opening edge of the groove serves to limit the radial limit of the contact pin 100. Prevent the stylus 100 from shaking.

Third, as shown in Figure 14, the first substrate 410 is provided with a through hole 411, and the first conductive sheet 420 is provided on the wall of the through hole 411 and extends to the opening of the side of the through hole 411 relative to the contact pin 100. The size of the edge and outer peripheral surface 110 is larger than the size of the groove. The vertex 120 of the contact pin 100 is used to extend into the through hole 411 , and the outer peripheral surface 110 of the contact pin 100 is used to make line contact with the first conductive sheet 420 .

The through hole 411 replaces the groove to prevent the apex 120 of the contact pin 100 from touching the bottom of the groove. It can be understood that the inner diameter of the through hole 411 should be smaller than the maximum outer diameter of the end of the contact pin 100 .

In one embodiment, as shown in FIG. 7 , the touch device further includes a second substrate 140 , a second conductive sheet 150 is provided on the second substrate 140 , and the contact pin 100 is connected by a second end opposite to the outer peripheral surface 110 . Second basis The board 140 is connected, and the second end is electrically connected to the second conductive sheet 150 . The second substrate 140 is connected to the pressing member 300 . The second substrate 140 is used to electrically connect to the control device of the three-dimensional molding equipment, so that the contact pin 100 is electrically connected to the control device of the three-dimensional molding equipment through the second conductive sheet 150 and the second substrate 140 . sexual connection.

The second substrate 140 can be connected to the bottom surface of the pressing member 300 through bolts, and the second end surface of the contact pin 100 is electrically connected to the second conductive piece 150 of the second substrate 140. In one embodiment, the second substrate 140 is provided with There is a mounting hole, the second conductive sheet 150 is arranged on the hole wall of the mounting hole, the contact pin 100 passes through the mounting hole from the second end surface, and the side wall of the contact pin 100 is electrically connected to the second conductive sheet 150 to increase the The contact pin 100 and the second conductive piece 150 are connected for the purpose of strength and stability.

In one embodiment, as shown in FIGS. 4-5 , the top end of the pressing member 300 includes a heat insulating member 600 , and the heat insulating member 600 is used to contact the nozzle 10 .

The pressing member 300 is provided with a plug hole extending vertically downward, and the heat insulating member 600 includes a heat insulating top surface and a plug connector located at one end of the heat insulating top surface. The plug connector of the heat insulating member 600 is inserted into the plug hole, so that the heat insulating member 600 is connected to the pressing member 300. The heat insulating top surface is made of a heat insulating material, such as rubber. In the process of detecting the height of the print head assembly, it is usually necessary to heat the print head assembly so that the print head assembly is in a printing environment and the height detection is more accurate. The heating of the print head assembly increases the temperature of the nozzle 10. The heat insulating top surface prevents the high-temperature nozzle 10 from directly contacting the part of the pressing member 300 that is not resistant to high temperatures, and prevents the local melting of the pressing member 300 from affecting the signal change position, thereby avoiding affecting the sensitivity. Among them, when the top of the pressing member 300 includes the heat insulating member 600, the top surface of the pressing member 300 refers to the top surface of the heat insulating member 600, that is, the top surface of the heat insulating member 600 and the preset point position on the forming platform 30 are in the same plane.

In one embodiment, as shown in Figures 9-14, the touch device further includes a position adjustment component. The connection state between the position adjustment component and the connection device 200 includes a first connection state and a second connection state. In the first connection state, The position adjustment component cooperates with the connection device 200 so that the connection device 200 moves relative to the position adjustment component when driven by an external force; in the second connection state, the connection device 200 is fixed relative to the position adjustment component. The position adjustment component is used to adjust and fix the height of the connection device 200.

The position adjustment assembly includes a housing 700, a first fixing part 800 and a second fixing part 900. The housing 700 is used to connect with the three-dimensional molding equipment, and the connecting device 200 is movably connected to the housing 700. The first fixing part 800 is used to connect with the pressing part 300 and the connecting device 200 to fix or loosen the relative position of the pressing part 300 and the connecting device 200 . The second fixing part 900 is used to connect the connecting device 200 and the housing 700 to fix or loosen the relative positions of the connecting device 200 and the housing 700 so that the top surface of the pressing part 300 is connected to the top surface of the forming platform 30 of the three-dimensional forming equipment. The preset points on the surface are in the same plane.

Specifically, the first fixing part 800 is used to fix the pressing part 300 in the conductive position.

In order to ensure that the top surface of the pressing member 300 is in the same plane as the preset point on the forming platform 30 and to facilitate the connection between the connecting device 200 and the three-dimensional forming equipment, a position adjustment component is provided to adjust the position of the top surface of the pressing member 300 . Adjust the first fixing part 800 to fix the pressing part 300 in the conductive position, and adjust the second fixing part 900 so that the connecting device 200 and the pressing part 300 can move relative to the housing 700 as a whole; fix the housing 700 on the forming platform 30 so that the top surface of the pressing member 300 is higher than the upper surface of the forming platform 30; use a tool with a flat surface, such as a flat plate, the flat surface of the tool contacts the upper surface of the forming platform 30 and the preset point, and at the same time, the flat surface of the tool contacts the upper surface of the forming platform 30. Press the top surface of the member 300 so that the connecting device 200 and the pressing member 300 move downward as a whole until the top surface is on the same plane as the preset point of the forming platform 30; adjust the second fixing member 900 so that the connecting device 200 and the housing 700 are fixed. , thereby fixing the position of the top surface of the pressing member 300 . Adjust the first fixing member 800 so that the pressing member 300 and the connecting device 200 can move relative to each other. At this time, the top surface of the pressing member 300 and the preset point of the forming platform 30 are still on the same plane, which facilitates subsequent height detection. The position adjustment component makes the position fixing of the connecting device 200 more accurate and convenient, and avoids the problem of inaccurate position of the connecting device 200 and inaccurate top surface height of the pressing member 300 if the connecting device 200 is directly bolted to the three-dimensional molding equipment.

In one embodiment, a slide groove 210 is provided on the connecting device 200 ; the pressing member 300 is disposed in the slide groove 210 ; the connecting device 200 is located in the shell 700 , and the pressing member 300 passes through the shell 700 and is partially exposed outside the shell 700 .

In one embodiment, as shown in FIG. 11 , the connecting device 200 is provided with a first fixing screw hole 220 , and the first fixing through hole 220 passes through the outer wall of the connecting device 200 , that is, through the outer surface of the connecting device 200 and the chute 210 . On the inner wall, the first fixing member 800 is a first bolt. The first bolt is used to be screwed to the first fixing screw hole 220 . The end of the first bolt is used to squeeze the pressing member 300 to fix the pressing member 300 .

The touch device 1000 may also include a first gasket 810. The pressing member 300 is provided with an installation groove corresponding to the first fixing screw hole 220. The first gasket 810 is embedded in the installation groove, and the first bolt is extruded through the first gasket 810. The pressing member 300 is used to avoid directly pressing the pressing member 300 and causing wear of the pressing member 300 . The first bolt adjustment operation is simple, does not increase the structural complexity of the pressing part 300, and facilitates processing.

In one embodiment, as shown in FIG. 10 , the housing 700 includes an inner cavity, a detection opening 710 and a fixation opening 720 that are connected to the inner cavity. The connecting device 200 is located in the inner cavity and can move in the inner cavity. The pressing member 300 extends out of the inner cavity through the detection opening 710. The fixing member relief opening 720 is a long through hole, and the adjustment head of the first fixing member 800 is located in the fixing member relief opening 720.

The connecting device 200 is in sliding contact with the side wall of the inner cavity, so that the connecting device 200 is stable without shaking when moving relative to the housing 700. The fixing member relief opening 720 is a long through hole extending in the vertical direction. The first bolt The nut of the first bolt is located in the fixing part relief opening 720. When the connecting device 200 moves relative to the housing 700, the nut of the first bolt moves in the fixing part relief opening 720. The first bolt can be carried out through the fixing part relief opening 720. adjustment. In addition, the fixing member relief opening 720 can also be used as a guide rail for the movement of the nut of the first bolt, thereby guiding the movement of the connecting device 200 .

In one embodiment, the housing 700 is provided with a second fixing screw hole 730 that penetrates the outer wall of the housing 700 , that is, penetrates the outer surface of the housing 700 and the inner wall of the inner cavity. pieces 900 denotes a second bolt. The second bolt is used to be screwed to the second fixing screw hole 730 . The end of the second bolt is used to squeeze the connecting device 200 to fix the connecting device 200 .

The touch device 1000 also includes a second gasket 910. The connection device 200 is provided with an installation groove corresponding to the second fixing screw hole 730. The second gasket 910 is embedded in the installation groove, and the second bolt is extruded and connected through the second gasket 910. The device 200 avoids directly squeezing the connection device 200 to cause wear of the connection device 200 . The second bolt has the same fixing principle as the first bolt.

In one embodiment, the position adjustment assembly 700 further includes a second elastic component 740. The second elastic component 740 is disposed between the connecting device 200 and the housing 700. The second elastic component 740 is used to apply the connecting device 200 to the connecting device 200. 200 moves toward the detection opening 710.

The bottom end of the connecting device 200 is separated from the bottom surface of the inner cavity by an end distance. The second elastic component 740 allows the connecting device 200 to be in a position of contact with the top surface of the inner cavity when it is not fixed by the second bolt, that is, the connecting device 200 When not fixed by the second bolt, the position of the top surface of the pressing member 300 is the highest position. During the adjustment of the height of the top surface of the pressing member 300, the top surface of the pressing member 300 is squeezed by the tool, the pressing member 300 and the connecting device 200 move downward in the inner cavity at the same time, and the second elastic component 740 is compressed. When the position of the top surface of the pressing member 300 needs to be readjusted, the pressure on the top surface of the pressing member 300 is released, and under the elastic force of the second elastic component 740, the pressing member 300 and the connecting device 200 move upward to the highest position at the same time. The second elastic component 740 allows the positions of the pressing member 300 and the connecting device 200 to be repeatedly adjusted, and allows the top surface of the pressing member 300 to be pressed against the plane of the tool, so that the top surface of the pressing member 300 is accurately positioned.

In one embodiment, as shown in Figures 12-14, the bottom end of the connecting device 200 is provided with at least one positioning post 230. The housing includes a positioning post relief hole 750 corresponding to the positioning post 230. The second elastic component One end of the second elastic member 740 is connected to the positioning post 230, and the other end of the second elastic member 740 is in contact with the housing 700. When the connecting device 200 moves relative to the housing 700, the positioning post 230 is movably inserted into the positioning post relief hole 750. Specifically, the second elastic component 740 is sleeved on the positioning post 230 , and the size of the second elastic component 740 is larger than the size of the positioning post relief hole 750 .

When the second elastic component 740 is a spring, the second elastic component 740 is sleeved on the positioning post 230. The number of the positioning post 230 and the positioning post relief hole 750 is two. When the connecting device 200 moves downward, the positioning post 230 Inserted into the positioning post relief hole 750, on the one hand, it guides the moving direction of the connecting device 200 to prevent the connecting device 200 from shaking; on the other hand, it limits the second elastic member 740 to prevent the second elastic member 740 from shaking and slipping.

In one embodiment, the housing 700 includes a shell 760 and a bottom plate 770. The shell 760 is a cavity structure. The shell 760 includes a bottom opening. The shell 760 is connected to the bottom plate 770 through the bottom opening to form an inner cavity. The detection opening 710 Set on the housing 760. The bottom plate 770 is provided with a positioning protrusion 751. The positioning protrusion 751 is used to insert into the housing 760 from the bottom opening and abut against the inner wall of the housing 760. The housing 760 is used to connect with the three-dimensional forming equipment. The housing 760 is provided with a connecting head 761, which extends in a direction perpendicular to the movement of the pressing member 300. The connecting head 761 is used to connect with the lower surface of the forming platform 30 of the three-dimensional forming equipment.

During installation, first put the pressing member 300 into the chute 210 of the connecting device 200, then put the connecting device 200 into the cavity of the casing 760 from the bottom opening of the casing 760, and finally cover the bottom plate 770 and position the locating protrusion 751. The contact with the shell 760 makes the base plate 770 connected to the shell 760, and then bolts are used to fix the base plate 770 and the shell 760. The contact between the positioning protrusion 751 and the shell 760 serves to initially fix the base plate 770 and the shell 760, which is convenient. Bolt the connection and ensure that the bottom plate 770 will not be dislocated or shaken. The positioning post relief hole 750 is provided on the bottom plate 770 .

On the other hand, as shown in Figures 15-20, an embodiment of the present invention also provides a three-dimensional molding equipment, including the aforementioned touch device 1000 or stylus 100. The three-dimensional molding equipment may also include other components, which are not limited in this application.

Specifically, the three-dimensional forming equipment may also include a base 40 , a guide mechanism 50 , a print head assembly, a forming platform 30 and a leveling device 20 . The print head assembly includes a nozzle 10 . The print head assembly and the forming platform 30 are respectively connected to the base 40 through the guide mechanism 50. The touching device 1000 is connected to the forming platform 30. The top surface of the touching device 1000 is in the same plane as the preset point of the forming platform 30. The leveling device 20 is connected to the print head assembly. The leveling device 20 is used to sense a preset point or the pressing member 300 of the touch device 1000 to generate a leveling signal. The nozzle 10 is used to push the pressing member 300 .

The guide mechanism 50 includes an X-axis guide frame, a Y-axis guide frame and a Z-axis guide frame. The forming platform 30 is installed on the base 40 through the Y-axis guide frame. The Z-axis guide frame is installed on both sides of the forming platform 30. The end is slidingly connected to the Z-axis guide frame, and the print head assembly is connected to the X-axis guide frame. The print head assembly is set up above the forming platform 30 through the X-axis guide frame and the Z-axis guide frame, and the nozzle 10 is opposite to the forming platform 30 . During the printing process, the guide mechanism 50 drives the nozzle 10 and the forming platform 30 to move relative to each other, so that the nozzle 10 sprays printing consumables layer by layer on the forming platform 30 . During the leveling process, the guide mechanism 50 is used to drive the print head assembly to move, so that the nozzle 10 touches the touch device 1000, and drives the leveling device 20 to sense the preset point or the touch device 1000, so as to realize the adjustment of the nozzle 10 and the touch device 1000. Obtaining the offset between flat devices 20. In addition, the guide mechanism 50 is also used to drive the print head assembly to move, so that the leveling device 20 senses the detection point, and then performs leveling detection of the forming platform 30 to obtain height information on the surface of the forming platform 30 . The specific implementation method will be explained in detail later.

The connection between the touch device 1000 and the forming platform 30 can be a direct connection or an indirect connection. For example, the touch device 1000 is connected to the base 40 or the guide mechanism 50. During the printing process, the touch device 1000 will not follow the forming process. The platform 30 moves. During the leveling process, the forming platform 30 is controlled to move to the leveling position and correspond to the touch device 1000 .

The specific structure of the leveling device 20 can be various. For example, the leveling device 20 is a non-contact leveling. The leveling device 20 is a sensor provided on the print head assembly. The sensor can be a remote inductive distance sensor. The device senses a preset point or the position of the sensing pressing member 300 to generate a leveling signal, for example, a leveling signal is generated at a distance of 5 mm from the preset point or the top of the sensing pressing member 300 . Alternatively, the leveling device 20 is a contact leveling device. The contact leveling device 20 mainly includes a fixing part, a detecting part, a sensing device and a driving device for moving the detecting part. The detecting part includes a detection position and a storage position, and a driving device. It is connected with the fixing part and the detecting part. The driving part is used to drive the detecting part to move in the vertical direction to switch between the storage position and the detecting position. The sensing device is fixedly connected to the fixing part. The detecting part can be a leveling device that is movably connected to the fixing part. probe. During the leveling detection process, the guide mechanism 50 drives the print head assembly to move downward, so that the detection part contacts the leveling detection point, and the print head assembly continues to move downward, so that the detection part moves relative to the fixed part under the push of the forming platform 30. Then it interacts with the sensing device to generate a leveling signal, and the control device obtains the actual height of the print head assembly when the leveling signal is generated, that is, the height of the print head assembly relative to the zero point at this time. Multiple detection points are evenly arranged on the forming platform 30 , and the above-mentioned leveling detection process is performed on each detection point to obtain platform height information of a plane parallel to the forming platform 30 . During the printing process, the printing height of the print head assembly is adjusted according to the height information of the printing platform surface and the offset between the nozzle 10 and the leveling device 20 to ensure that the nozzle 10 of the print head and the upper surface of the forming platform 30 are always maintained. Always height to achieve automatic leveling.

In one embodiment, the three-dimensional forming equipment further includes a cleaning assembly 60 connected to the forming platform 30 for cleaning the bottom end of the nozzle 10 before using the touching device 1000 .

In order to ensure the accuracy of the offset detection between the nozzle 10 and the leveling device 20 and make the detection environment of the print head assembly close to the working environment during the actual printing process, during the detection process, the print head assembly will be heated, or The print head assembly and the forming platform 30 are heated simultaneously. After the print head assembly is printed once, there will be printing filament residue in the nozzle 10 and the throat connected to the nozzle 10. When the print head assembly is reheated, the remaining printing filament will melt by heat and overflow to the outside of the nozzle 10 under the action of gravity. , if the consumables are agglomerated at the bottom opening of the nozzle 10, the nozzle 10 cannot be directly touched. Touching the device 1000 will affect the detection result of the offset between the nozzle 10 and the leveling device 20 . By arranging the cleaning component 60, after the print head assembly is heated and before the detection starts, the printing consumables overflowing from the bottom of the nozzle 10 can be cleaned to ensure that the nozzle 10 directly contacts the contact device 1000 to avoid inaccurate detection results. In one embodiment, the cleaning assembly 60 includes a bracket 61 and a brush 62. One end of the bracket 61 is connected to the forming platform 30. The other end of the bracket 61 extends and is suspended in a direction away from the forming platform 30. The brush 62 is fixed on the bracket. 61 on the hanging end. The guide mechanism 50 drives the print head assembly to move so that the nozzle 10 is opposite to the brush 62, moves the print head assembly downward so that the bottom end of the nozzle 10 contacts the brush 62, and moves the nozzle 10 repeatedly to clean the nozzle 10. The brush 62 can also be other cleaning parts, such as foam.

On the other hand, as shown in Figure 21, an embodiment of the present invention also provides a printing control method, which is implemented using any of the aforementioned three-dimensional molding equipment, including:

S11: Control the nozzle of the print head assembly to push the pressing member to generate a detection signal.

Control the movement of the print head assembly so that the nozzle 10 is opposite to the top of the pressing member 300. Continue to control the print head assembly to move downward so that the bottom end of the nozzle 10 is in contact with the top of the pressing member 300. The nozzle 10 continues to move downward for a certain distance. The needle 100 will move downward to break away from electrical contact with the conductive member 400, change from the electrical conduction state to the disconnection state, and then generate a detection signal.

It can be understood that controlling the nozzle of the print head assembly to push the pressing member to generate a detection signal includes:

Control the nozzle of the print head assembly to push the pressing member so that the first conductive device connected to the pressing member is out of electrical contact with the second conductive device; wherein, the signal lines corresponding to the first conductive device and the second conductive device change , then a detection signal is generated.

The electrical signal passes through the first conductive device and the second conductive device, and its state is the first signal. If the first conductive device and the second conductive device are out of electrical contact, the electrical signal cannot pass through the first conductive device and the second conductive device. Then the signal will change, and the three-dimensional molding equipment can be considered to have generated a detection signal.

It can be understood that the print head assembly is controlled to move so that the bottom end of the nozzle pushes the pressing member to generate the inspection Before measuring the signal, you can include:

Control the movement of the print head assembly and the forming platform to zero the print head assembly and the forming platform.

S12: Obtain the first height information h1 of the print head assembly according to the detection signal.

When detecting that the contact pin 100 and the conductive member 400 are electrically disconnected, that is, out of electrical contact, the control device of the three-dimensional molding equipment obtains the actual height of the print head assembly, that is, the height of the print head assembly relative to the zero point at this time, as the third A height information h1.

Wherein, obtaining the first height information of the print head assembly according to the detection signal may include:

Obtain the current coordinates of the print head assembly according to the detection signal; obtain the first height information of the print head assembly according to the current coordinates corresponding to the detection signal;

When the three-dimensional molding equipment is running, the position coordinates of the print head assembly and the molding platform are determined. When the detection signal is generated, the current coordinates of the print head assembly can be obtained. The height coordinate of the current coordinate corresponding to the detection signal is the printing The first height information of the header component.

S13: Control the leveling device to sense the preset point of the forming platform to generate a leveling signal, where the static height of the pressing member is set to be the same as the height of the preset point.

Printhead assembly movement can be controlled so that the leveling device moves synchronously with the printhead assembly.

The static height is the height before the pressing member is pushed. The static height of the pressing member is set to be the same as the height of the preset point, so that the leveling accuracy can be as high as possible.

The preset point is a point on the forming platform 30 close to the touch device 1000. For example, if the specification of the forming platform 30 is 150 mm*150 mm, the preset point is the point closest to the touch device 1000 among the points 5 mm away from the edge of the side of the forming platform 30 relative to the touch device 1000. The preset point can also be the point closest to the touch device 1000 among the leveling detection points. For example, if 16 monitoring points are evenly distributed on the forming platform 30, the point closest to the touch device 1000 is selected as the preset point. The process of controlling the movement of the print head assembly so that the leveling device 20 senses the preset point of the forming platform can be regarded as a leveling detection point. During the leveling detection process, the leveling device 20 senses a preset point and generates a leveling signal.

Alternatively, the leveling device 20 may also be configured to sense the pressing member and generate a leveling signal.

Among them, controlling the leveling device to sense the preset point position of the forming platform to generate a leveling signal may include:

Control the movement of the leveling device to sense the preset point of the forming platform; if the signal of the leveling device changes, a leveling signal is generated.

When the distance between the leveling device and the molding platform reaches a preset distance, or the leveling device contacts the molding platform to a certain extent, the signal from the leveling device will change. The three-dimensional molding equipment can adjust the signal according to the signal from the leveling device. A change has occurred, confirm that the control leveling device senses the preset point of the forming platform.

S14: Obtain the second height information h2 of the print head assembly according to the leveling signal;

The control device of the three-dimensional molding equipment obtains the actual height of the print head assembly when the leveling signal is generated, that is, the height of the print head assembly relative to the zero point at this time, and then obtains the second height information h2.

Wherein, obtaining the second height information of the print head assembly according to the leveling signal may include:

The current coordinates of the print head assembly are obtained according to the leveling signal; and the second height information of the print head assembly is obtained according to the current coordinates corresponding to the leveling signal.

When the three-dimensional molding equipment is running, the position coordinates of the print head assembly and the molding platform are determined. When the leveling signal is obtained, the current coordinates of the print head assembly can be obtained, and the height coordinates of the current coordinates corresponding to the leveling signal are obtained. That is the second height information of the print head assembly.

S15: Determine the offset of the nozzle relative to the leveling device based on the first height information and the second height information.

It is worth mentioning that the contact pin 100 will move downward for a certain distance to separate from the conductive member 400. This distance is called the separation distance b. The separation distance b is usually very small and can be ignored in the calculation of the offset. Alternatively, the breakaway distance b can be measured experimentally to increase the leveling accuracy, and the actual offset can be the first The offset determined by the height information h1 and the second height information h2 is added to the separation distance b, such as offset H=h1-h2+b.

S16: Determine the printing height of the print head assembly based on the offset.

Printing height is the height of the print head during printing. When printing each layer of the model, the printing height of each layer is different. Determine the printing height of the print head assembly based on the offset, that is, print the model based on the offset.

Among them, the printing height of the print head assembly is determined based on the offset, including:

Control the movement of the print head assembly so that the leveling device senses multiple detection points on the forming platform and generates platform height information of a plane parallel to the forming platform;

Determine the print height of the printhead assembly based on the offset and platform height information.

After the offset is determined, leveling detection of the forming platform 30 is performed, specifically by controlling the movement of the print head assembly so that the leveling device 20 senses multiple detection points on the forming platform 30 and generates a plane parallel to the forming platform 30 platform height information. If multiple coordinates are preset, for example, 16 coordinates are preset, that is, corresponding to 16 leveling detection points of the forming platform 30. For each detection point, the guide mechanism 50 drives the print head assembly to move downward, so that the leveling device 20 Sense the leveling detection point, generate a leveling signal, obtain the actual height of the print head assembly according to the leveling signal, and then control the device to obtain the actual height of the print head assembly at each detection point, that is, obtain a plane parallel to the surface of the forming platform 30 height information.

Determine the print height of the printhead assembly based on the offset and platform height information. During leveling detection, the actual height of the print head assembly at a detection point is d, and the thickness of the first layer of the model is L. The thickness L is a preset value. When printing the first layer of the model, at that point, the print head assembly The printing height should be d+H+L.

In the printing control method proposed by the embodiment of the present invention, the first height information is obtained by pushing the pressing member through the nozzle to generate a detection signal, and the second height information is obtained by sensing the preset point of the forming platform through the leveling device to generate a leveling signal. According to The first height information and the second height information determine the position of the nozzle relative to the leveling device. Offset, realize the automatic acquisition of the offset of the nozzle relative to the leveling device, and then perform leveling detection through the leveling device, and control the printing height of the print head assembly according to the platform height information and offset, so that the bottom of the nozzle is in line with the molding The distance between the platforms is accurate and does not change during the printing process, allowing the model to be accurately formed, eliminating the need to manually adjust the initial position of the nozzle and the printing platform, and achieving automatic leveling.

In one embodiment, before controlling the leveling device to move from the detection position to the storage position, the method further includes:

Apply heat to the build platform and/or printhead assembly.

When the nozzle 10 and the forming platform 30 are heated, thermal expansion and contraction will occur, causing the position of the bottom of the nozzle 10 and/or the position and shape of the top surface of the forming platform 30 to change. For example, the bottom of the nozzle 10 will become lower. For accuracy Detecting the offset and heating the forming platform 30 and/or the print head assembly can make the detection environment of the forming platform 30 and the print head assembly close to the working environment during the actual printing process, making the offset detection and leveling detection more accurate. Accurate, ensuring that the position of the print head assembly is more accurate during the printing process.

The print head assembly is controlled to move so that the bottom end of the nozzle contacts the cleaning assembly, and the print head assembly is controlled to move repeatedly within a preset area corresponding to the cleaning assembly.

Use the cleaning component 60 to clean the residual consumables that have overflowed due to the heat of the nozzle 10, to avoid the problem of inaccurate detection caused by the nozzle 10 being unable to directly contact the touch device 1000.

Based on the above method shown in Figure 21, correspondingly, an embodiment of the present invention also provides a storage medium on which a computer program is stored. When the computer program is executed by a processor, the above printing control method shown in Figure 21 is implemented.

Based on this understanding, the technical solution of this application can be embodied in the form of a software product. The software product can be stored in a non-volatile storage medium, which can be a CD-ROM, U disk, mobile hard disk, etc., and includes a number of instructions. So that a computer device can be a personal computer, a server, or a network device, etc. to execute the methods of each implementation scenario of the present application.

Based on the above method shown in Figure 21 and the virtual device embodiment, in order to achieve the above purpose, Embodiments of the present application also provide a three-dimensional molding device, which includes a storage medium and a processor; the storage medium is used to store a computer program; and the processor is used to execute the computer program to implement the above as shown in Figure 21 Print control methods.

Optionally, the three-dimensional forming device can also include a user interface, a network interface, a camera, a Radio Frequency, an RF circuit, a sensor, an audio circuit, a WI-FI module, etc. The user interface may include a display screen, an input unit such as a keyboard, etc. The optional user interface may also include a USB interface, a card reader interface, etc. Optional network interfaces can include standard wired interfaces, wireless interfaces such as Bluetooth interfaces, WI-FI interfaces, etc.

Those skilled in the art can understand that the structure of a three-dimensional molding device provided in this embodiment does not constitute a limitation on the three-dimensional molding device. It may include more or fewer components, or combine certain components, or arrange different components. .

The storage medium may also include an operating system and a network communication module. An operating system is a program that manages and saves the hardware and software resources of a computer device and supports the operation of information processing programs and other software and/or programs. The network communication module is used to implement communication between components within the storage medium, as well as communication with other hardware and software in the physical device.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, and all of them should be covered. within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

A touch device (1000), characterized in that it is used in three-dimensional molding equipment, and the touch device (1000) includes:

Connecting device(200);

A pressing member (300) cooperates with the connecting device (200) to move relative to the connecting device (200) under the driving force of an external force;

a first conductive device, the first conductive device being connected to the connecting device (200),

A second conductive device, the second conductive device is connected to the pressing member (300), and the pressing member (300) moves relative to the connecting device (200) including at least a conduction position and a disconnection position. In the on position, the second conductive device is in electrical contact with the first conductive device; in the off position, the second conductive device is out of electrical contact with the first conductive device.
The touch device according to claim 1, characterized in that the touch device further includes:

The connecting device (200) is provided with a chute (210);

The pressing member (300) is arranged in the chute (210);

One of the first conductive device and the second conductive device is a conductive member (400), and the other is a contact pin (100).
The touch device according to claim 2, characterized in that the touch device further includes:

The contact pin (100) is used to electrically conduct with the conductive member (400) by electrically contacting the conductive member (400),

The contact pin (100) includes a main body (101) and an end head. The end head is provided at one axial end of the main body (101). The end head includes an outer peripheral surface (110) and a terminal located on the outer peripheral surface (110). Vertex (120) on 110);

The contact pin (100) makes point contact with the conductive member (400) through the vertex (120), so as to be electrically connected with the conductive member (400).
The touch device according to claim 3, characterized in that the cross-sectional area of the end gradually decreases in a direction approaching the apex (120);

The outer peripheral surface (110) is a spherical surface;

Alternatively, the outer peripheral surface (110) is a tapered surface;

Alternatively, the outer circumferential surface (110) is a cone surface, with a plurality of depressions (130) distributed in the circumferential direction of the cone surface, and the depressions (130) extend to the vertex (130) in the generatrix direction of the cone surface ( 120).
The touch device according to claim 2, characterized in that the touch device further includes:

A first elastic member (500). The first elastic member (500) is in direct or indirect contact with the pressing member (300). The first elastic member (500) is used to apply force to the pressing member (300). The force that moves the pressing member (300) from the off position to the on position.
The touch device according to claim 5, characterized in that:

The first elastic member (500) is provided between the pressing member and the fixing device;

Alternatively, the first elastic member (500) is provided between the bottom of the pressing member (300) and the bottom of the chute (210);

Alternatively, the pressing member (300) is provided with at least one mounting hole (310) at one end relative to the bottom of the chute (210), and one end of the first elastic member (500) is inserted into the mounting hole (310). ), the other end of the first elastic member (500) is connected to the groove wall of the chute (210).
The touch device according to claim 2, characterized in that:

The pressing member (300) includes a relief hole (320);

The contact pin (100) is arranged in the pressing member (300), and the apex (120) of the contact pin (100) protrudes from the bottom wall of the relief hole (320);

The conductive component (400) includes a first substrate (410) and a first conductive sheet (420). The first substrate (410) is fixedly connected to the connection device (200). The first substrate (410) at least partially Located in the relief hole (320), the pressing member (300) can move relative to the first substrate (410) through the relief hole (320), and the first conductive sheet (420) is disposed on On the first substrate (410), and the first conductive sheet (420) is located in the relief hole (320);

The contact pin (100) corresponds to the first conductive sheet (420) and is used for contacting or disengaging from the first conductive sheet (420).
The touch device according to claim 7, characterized in that:

The relief hole (320) penetrates the pressing member (300), the first substrate (410) passes through the relief hole (320), and the two ends of the first substrate (410) are respectively Fixedly connected to the connecting device (200);

Alternatively, the relief hole (320) passes through the pressing member (300), the relief hole (320) is located in the slide groove (210), and the first substrate (410) passes through the A relief hole (320) is provided, and both ends of the first base plate (410) are fixedly connected to the inner wall of the chute (210) respectively;

Alternatively, the relief hole (320) is located in the chute (210), the chute (210) includes a top opening, and the connecting device (200) is provided with an installation gap (200) that passes through the top opening. 211), the first substrate (410) is fixedly connected to the installation gap (211).
The touch device according to claim 7, characterized in that:

The contact pin (100) is used to electrically conduct with the conductive member (400) by contacting the conductive member (400),

The contact pin (100) includes a main body (101) and an end head. The end head is provided at one axial end of the main body (101). The end head includes an outer peripheral surface (110) and a terminal located on the outer peripheral surface (110). Vertex (120) on 110);

The contact pin (100) is in point contact with the conductive member (400) through the vertex (120) so as to be electrically connected to the conductive member (400);

The first conductive piece (420) is disposed on the surface of the first substrate (410) opposite to the contact pin (100), and the vertex (120) of the contact pin (100) is used to contact the contact pin (100). The first conductive piece (420) is in point contact;

Alternatively, the first substrate (410) is provided with a groove on one side relative to the contact pin (100), and the first conductive piece (420) is provided on the groove wall and extends to The opening edge of the groove, the size of the outer peripheral surface (110) is larger than the size of the groove, the apex (120) of the contact pin (100) is used to extend into the groove, and the contact pin (100) is used to extend into the groove. The outer peripheral surface (110) of the needle (100) is used to make line contact with the first conductive sheet (420);

Alternatively, the first substrate (410) is provided with a through hole (411), and the first conductive sheet (420) is provided on the wall of the through hole (411) and extends to the through hole (411). 411) Relative to the edge of the opening on one side of the contact pin (100), the size of the outer peripheral surface (110) is larger than the size of the groove, and the apex (120) of the contact pin (100) is used to extend into the through hole. (411), the outer peripheral surface (110) of the contact pin (100) is used to make line contact with the first conductive sheet (420).
The touch device according to claim 7, characterized in that:

The touch device also includes a second substrate (140), a second conductive sheet (150) is provided on the second substrate (140), and the contact pin (100) is formed from an angle opposite to the outer peripheral surface (110). ) is connected to the second substrate (140), and the second end is electrically connected to the second conductive sheet (150). The second substrate (140) is used to connect with the three-dimensional The control device of the molding equipment is electrically connected.
The touch device according to claim 1, characterized in that

The top end of the pressing member (300) includes a heat insulating member (600), and the heat insulating member (600) is used to contact the nozzle (10).
The touch device according to any one of claims 1 to 11, characterized in that the touch device further comprises:

Position adjustment component. The connection state between the position adjustment component and the connection device (200) includes a first connection state and a second connection state. In the first connection state, the position adjustment component and the connection device (200) Cooperate, so that the connecting device (200) moves relative to the position adjusting component when driven by an external force; in the second connection state, the connecting device (200) is fixedly connected relative to the position adjusting component;

The position adjustment assembly includes a housing (700), a first fixing part (800) and a second fixing part (900), and the connecting device (200) is movably connected to the housing (700);

The first fixing part (800) is used to connect with the pressing part (300) and the connecting device (200) to fix or loosen the relative position between the pressing part (300) and the connecting device (200). Location;

The second fixing member (900) is used to connect the connecting device (200) and the housing (700) to fix or loosen the relative position between the connecting device (200) and the housing (700). Location.
The touch device according to claim 12, characterized in that: the connecting device (200) is provided with a chute (210);

The pressing member (300) is disposed in the sliding groove (210);

The connecting device (200) is located inside the shell (700), and the pressing member (300) passes through the shell (700) and is partially exposed outside the shell (700).
The touch device according to claim 12, characterized in that: the first fixing part (800) is used to fix the pressing part (300) in the conductive position;

The connecting device (200) is provided with a first fixing screw hole (220), the first fixing through hole (220) penetrates the outer wall of the connecting device (200), and the first fixing piece (800) is The first bolt is used to be screwed to the first fixing screw hole (220). The end of the first bolt is used to squeeze the pressing member (300) to fix the pressing member. pieces(300).
The touch device according to claim 12, characterized in that:

The housing (700) includes an inner cavity, a detection opening (710) and a fixing member release opening (720) connected to the inner cavity. The connecting device (200) is located in the inner cavity and can be connected to the inner cavity. When moving in the inner cavity, the pressing member (300) extends out of the inner cavity through the detection opening (710), the fixing member release opening (720) is a long through hole, and the first fixing member The adjusting head of the component (800) is located in the fixing component clearance opening (720).
The touch device according to claim 15, characterized in that:

The housing is provided with a second fixing screw hole (730), the second fixing screw hole (730) penetrates the outer wall of the housing, and the second fixing member (900) is a second bolt, so The second bolt is used to be screwed to the second fixing screw hole (730), and the end of the second bolt is used to squeeze the connecting device (200) to fix the connecting device (200).
The touch device according to claim 15, characterized in that:

The position adjustment assembly (700) also includes a second elastic component (740) disposed between the connecting device (200) and the housing (700). The two elastic components (740) are used to apply an elastic force to the connecting device (200) to move the connecting device (200) toward the detection opening (710).
The touch device according to claim 17, characterized in that:

The bottom end of the connecting device (200) is provided with at least one positioning post (230), and the housing includes a positioning post relief hole (750) corresponding to the positioning post (230). The second One end of the elastic component (740) is connected to the positioning post (230), the other end of the second elastic component (740) is in contact with the housing (700), and the connecting device (200) is opposite to the When the housing (700) moves, the positioning post (230) is movable and inserted into the positioning post relief hole (750);

The second elastic component (740) is sleeved on the positioning post (230), and the size of the second elastic component (740) is larger than the size of the positioning post relief hole (750).
The touch device according to claim 15, characterized in that:

The housing (700) includes a housing (760) and a bottom plate (770). The housing (760) is a cavity structure. The housing (760) includes a bottom opening. The housing (760) passes through the bottom. The end opening is connected to the bottom plate (770) to enclose the inner cavity, and the detection opening (710) is provided on the outer shell (760);

The bottom plate (770) is provided with a positioning protrusion (751). The positioning protrusion (751) is used to insert into the housing (760) from the bottom opening and connect with the inner wall of the housing (760). Abut;

The housing (760) is provided with a connecting head (761), and the connecting head (761) extends in a direction perpendicular to the movement of the pressing member (300).
A contact pin (100), characterized in that it is used in a touch device (1000) for leveling, and the contact pin (100) is used to electrically conduct with the conductive member by contacting the conductive member. ,

The contact pin (100) includes a main body (101) and an end head. The end head is provided at one axial end of the main body (101). The end head includes an outer peripheral surface (110) and a terminal located on the outer peripheral surface (110). Vertex (120) on 110);

The contact pin (100) makes point contact with the conductive member through the vertex (120), so as to be electrically connected with the conductive member.
The stylus of claim 20, wherein the cross-sectional area of the tip gradually decreases in a direction approaching the apex (120);

The outer peripheral surface (110) is a spherical surface;

Alternatively, the outer peripheral surface (110) is a conical surface;

Alternatively, the outer circumferential surface (110) is a cone surface, with a plurality of depressions (130) distributed in the circumferential direction of the cone surface, and the depressions (130) extend to the vertex (130) in the generatrix direction of the cone surface ( 120).
A three-dimensional molding equipment, characterized in that it includes as described in any one of claims 1-18 The touch device (1000), or the stylus (100) according to any one of claims 20-21.
The three-dimensional forming equipment according to claim 22, characterized in that the three-dimensional forming equipment further includes a base (40), a guide mechanism (50), a print head assembly, a forming platform (30) and a leveling device (20), The printhead assembly includes the nozzle (10);

The print head assembly and the forming platform (30) are respectively connected to the base (40) through the guide mechanism (50);

The contact device (1000) is connected to the forming platform (30). When the pressing member (300) is in the conductive position, the top surface of the pressing member (300) is in contact with the three-dimensional forming equipment. The preset points on the upper surface of the forming platform (30) are in the same plane;

The leveling device (20) is connected to the print head assembly. The leveling device (20) is used to sense the preset point or the pressing member (300) of the touch device (1000). ) to generate a leveling signal, and the nozzle (10) is used to push the pressing member (300).
The three-dimensional molding equipment according to claim 23, characterized in that the three-dimensional molding equipment further includes:

Cleaning assembly (60), the cleaning assembly (60) is connected to the forming platform (30), and is used to clean the bottom end of the nozzle (10) before using the touching device (1000).
A printing control method, characterized by comprising:

Control the nozzle of the print head assembly to push the pressing member to generate a detection signal;

Acquire first height information of the print head assembly according to the detection signal;

Control the leveling device to sense a preset point of the molding platform to generate a leveling signal; wherein the static height of the pressing member is set to be the same as the height of the preset point;

Obtain second height information of the print head assembly according to the leveling signal;

The relative position of the nozzle to the leveling device is determined based on the first height information and the second height information. offset;

The print height of the print head assembly is determined based on the offset.
The printing control method according to claim 25, characterized in that:

Determining the printing height of the print head assembly according to the offset includes:

Control the movement of the print head assembly so that the leveling device senses multiple detection points on the forming platform and generates platform height information of a plane parallel to the forming platform;

The print height of the print head assembly is determined based on the offset and the platform height information.
The printing control method according to claim 25, characterized in that:

Controlling the movement of the print head assembly so that the bottom end of the print head assembly pushes the pressing member and before generating a detection signal also includes:

heating the forming platform and/or the printhead assembly;

After the heating of the forming platform and/or the print head assembly, the method further includes:

Controlling movement of the printhead assembly so that the bottom end of the nozzle contacts the cleaning assembly;

The print head assembly is controlled to move repeatedly within a preset area corresponding to the cleaning assembly.
The printing control method according to claim 25, characterized in that:

The control of the nozzle of the print head assembly to push the pressing member to generate a detection signal includes:

Control the nozzle of the print head assembly to push the pressing member so that the first conductive device connected to the pressing member is out of electrical contact with the second conductive device; wherein, the first conductive device and the second conductive device are If the corresponding signal line changes, the detection signal is generated;

Obtaining the first height information of the print head assembly according to the detection signal includes:

Obtain the current coordinates of the print head assembly according to the detection signal;

Obtain the first height information of the print head assembly according to the current coordinates corresponding to the detection signal;

The control leveling device senses the preset point of the forming platform to generate a leveling signal, including:

Control the movement of the leveling device to sense the preset point of the forming platform; wherein, if the signal of the leveling device changes, a leveling signal is generated;

Obtaining the second height information of the print head assembly according to the leveling signal includes:

Obtain the current coordinates of the print head assembly according to the leveling signal;

According to the current coordinates corresponding to the leveling signal, the second height information of the print head assembly is obtained.
A storage medium on which a computer program is stored, characterized in that when the computer program is executed by a processor, the printing control method according to any one of claims 25-28 is implemented.