WO2020199584A1 - Dlp printer and control system thereof and visible light resin printing method - Google Patents

Abstract

A DLP printer, comprising a base (100), a pattern generator fixing base (200), a pattern generator (300), a forming groove (400), a folding frame (500), a forming work surface (600), and a control unit (700) for controlling an XY-axis sliding table (520) to move up and down. The base (100) is connected to the folding frame (500) by means of a rotating shaft (530), the base (100) and the folding frame (500) are capable of rotating relatively, the forming groove (400) is disposed on the base (100), the pattern generator fixing base (200) is disposed parallel to a lower end of the forming groove (400), the pattern generator (300) is placed on the pattern generator fixing base (200), and the forming work surface (600) is mounted on the folding frame (500) by means of the XY-axis sliding table (520). A control system comprises a cloud server and a mobile terminal upper computer controller, and the DLP printer, as a lower computer, interacts with the mobile terminal upper computer controller by means of the control unit (700). For a visible light resin printing method, on the basis of the DLP printer using a mobile device as a light source and using a non-toxic water-soluble visible light photosensitive resin as a printing material, damage to a human body can be eliminated and costs can be reduced.

Description

A DLP printer and its control system and visible light resin printing method Technical field

The invention relates to the field of 3D printing, in particular to a DLP printer and its control system and a visible light resin printing method.

Background technique

3D printing is a rapid prototyping (Rapid Prototyping Manufacturing) technology. With its unique manufacturing advantages, it has attracted attention from various fields and is known as the symbol of the third industrial revolution. It first establishes a three-dimensional model of the workpiece to be processed through computer software, and then layer the three-dimensional model through the software, and transfers the layered slice information to the 3D printing device, and the final device performs layer by layer according to the transferred layering information. Product production. Different from traditional manufacturing methods, 3D printing uses continuous addition of materials to produce products, so it is called additive manufacturing.

With the rapid development of 3D printing technology, many 3D printing technologies, such as SLA, SLS, FDM, etc., have been successfully developed and commercialized, gradually moving from industrial applications to home use, but the common home desktop 3D printers on the market are not The method of fused deposition of metal wires (Fused Deposition Modeling, FDM) has the disadvantage of low forming accuracy. Compared with this, the light curing forming technology is a rapid prototyping technology that first appeared and realized commercialization in the world, and it is also one of the most in-depth and widely used rapid prototyping technologies. It has fast forming speed, high precision and forming The surface of the object is smooth and the quality is good.

Mainstream photo-curing technologies include stereolithography (SLA) and digital photo-curing (DLP). DLP forming technology is the improvement and development of SLA three-dimensional lithography technology. SLA scans light-curing materials point by point, while DLP projects light-curing materials; SLA is point-by-point curing and finally pieced together into layers, DLP realizes In order to cure the entire ply at the same time, the efficiency is significantly improved compared with SLA, and the forming accuracy is very high, and the comprehensive performance of the formed part is good.

However, the current DLP equipment on the market usually uses an ultraviolet light source to cure the ultraviolet photosensitive resin. Because ultraviolet light has certain damage to human eyesight, the ultraviolet photosensitive resin has certain toxicity; at the same time, even the existing desktop DLP equipment, Its size is also large, the price is expensive, the cost of consumables is high, and it requires operators with certain professional knowledge to use it; and in its control, the single-chip microcomputer is generally used as the core of the equipment control system, resulting in a relatively large control board. Large, the installation on portable devices is subject to certain restrictions. During additive manufacturing, it is controlled by internal computers. Mobile devices are required for data import. It cannot interact with mobile phones and other terminals to achieve remote control, and it cannot perform real-time printing data feedback. .

Therefore, the commonly used light curing equipment with relatively high forming accuracy is not suitable for household use and the large-scale promotion of this technology due to its large volume, heavy weight, high harm to curing light sources and materials, and complex control operations. The process and speed of its commercialization.

Summary of the invention

Aiming at the problems in the prior art, the present invention provides a DLP printer and its control system and a visible light resin printing method.

The present invention is realized through the following technical solutions:

A DLP printer, including a base, a pattern generator fixed seat, a pattern generator, a forming slot, a folding frame and a forming working surface, and a control unit for controlling the up and down movement of the XY axis slide table;

The base and the folding frame are connected by a rotating shaft, the base and the folding frame can rotate relatively, the forming groove is arranged on the base, the pattern generator fixing seat is arranged parallel to the lower end of the forming groove, and the pattern generator is placed on the pattern generator fixing seat. The forming working surface is installed on the folding frame through the XY-axis sliding table, and the forming working surface can be detachably fixed on the XY-axis sliding table; the control unit is arranged on the base.

A DLP printer control system includes a cloud server and a mobile-end host computer controller. The DLP printer acts as a lower computer and interacts with the mobile-end host computer controller through a control unit.

The cloud server includes a model library that stores the slice data of the model to be printed and a Web status monitoring page that monitors the operating status of the device, which is used to transmit the model slice data to the mobile host controller and collect the status information of the device;

The upper computer controller of the mobile terminal includes a slice image display module, a control instruction module, and a device state storage module; the slice image display module is used to sequentially display the slice images of the model layer; the control instruction module is used to send the motion instructions of the forming face To the control unit; the device status storage module is used to store the DLP printer operating status information fed back by the control unit, and at the same time transmit the information to the cloud server for the Web status monitoring page;

The control unit includes a moving part drive module and an equipment state acquisition module; the moving part drive module is used to receive control instructions sent by the upper computer to control the forming working surface of the equipment to move; at the same time, the equipment state acquisition module is used to collect the current layer number and The equipment fault information is sent to the upper computer controller of the mobile terminal.

A visible light resin printing method using the DLP printer described in the present invention and the control system described in the present invention; including the following steps,

Step 1), preparation for printing, including raising the folding frame, installing and leveling the forming working surface, filling resin material and shading, powering on the DLP printer, connecting and pairing the mobile host computer, and downloading the cloud server from the mobile host computer Stored models and set the basic printing parameters of the DLP printer;

Step 2), first place the pattern generator on the fixed base of the pattern generator, and clamp it by the fixture of the fixed base of the pattern generator; starting from the zero position, the driving pattern generator of the upper computer controller at the mobile end starts to display the second part of the model. Dimensional slice image, use the image to irradiate the visible light photosensitive resin in the storage chamber to cure it on the stationary forming work surface, and send a control command to the motor to control the forming work surface after irradiating each layer of the model slice image for the set exposure time Move the given floor height, the mobile terminal host computer and DLP printer communicate with each other until the printing is completed;

Step 3), model processing, including removing and cleaning up the model after printing.

Compared with the prior art, the present invention has the following beneficial technical effects:

The DLP printer of the present invention connects the base and the folding frame through a rotating shaft, realizes the relative rotation of the base and the folding frame, reduces the carrying volume of the whole machine, and uses a pattern generator fixed seat arranged parallel to the lower end of the forming groove to place the pattern generator , To ensure the parallel stability of the light source of the pattern generator, the forming working surface is detachably fixed on the XY-axis sliding table, and the XY-axis sliding table is used to realize the movement of the forming working surface on the folding frame, and the forming working surface can be disassembled when not in use. The relative rotation between the folding frame and the base is used to fold the folding frame and the base to reduce the volume of the overall structure, which is convenient to carry. When using, fix the forming working surface on the folding frame, and then fix the pattern generator The base is slid into the placement slot of the base to realize the parallel placement of the pattern generator, and then the up and down movement of the forming working surface is controlled by the XY-axis sliding table, touching the material in the forming groove, and using the pattern at the bottom of the base to generate The light source is generated by the device to realize the accumulation of the material on the forming work surface. The XY axis slide table reciprocates to realize the forming process. After the forming is completed, the forming work surface is disassembled from the folding frame, and the base and the folding frame are folded to reduce The volume of the whole device is small, the weight of the whole device is reduced, and it is easy to carry.

The present invention is a control system for a DLP printer, which stores model layer cut-out print data through a cloud server; uses the drive image display module of the mobile terminal host computer controller to display the model layer cut image, and the control module obtains the model from the cloud server through the wireless transmission module Layer cut graph printing data, and send the obtained model layer cut graph printing data to the control unit; the equipment state collection module obtains the DLP printer operating status information fed back by the control unit through the wireless transmission module, and passes the acquired DLP printer operating status information through The control module is transmitted to the cloud server for web-side status monitoring; the wireless communication module of the control unit receives the model layer cut and print data, and transmits the model layer cut and print data to the motion drive module. The wireless communication module also collects the data from the state feedback module The equipment status information is transmitted to the upper computer controller of the mobile terminal. The user operates the equipment through the upper computer controller of the mobile terminal, and sends control instructions to the control unit. The control unit converts the control instructions into electrical signals that the hardware can respond to to drive the equipment The moving parts act, and at the same time, the hardware device also feeds back its own working status signal to the mobile device. The entire control system coordinates the joint work of software and hardware of the equipment to complete the model printing process.

Among them, the cloud model library of the present invention provides a large number of sliced models for users to choose, so that users avoid complicated operations of model slicing, and reduce the difficulty of using the device. The cloud device status monitoring web page enables users to understand the printing progress and device status. Using a mobile device as a light source reduces the cost of the device, and the light source emits visible light without causing harm to users. The upper computer controller of the mobile terminal and the lower computer device controller use short-range wireless communication for data exchange, which reduces the complexity of the connection between the device modules.

A visible light resin printing method of the present invention is based on a DLP printer that uses a mobile device as a light source and uses a non-toxic water-soluble visible light photosensitive resin as a printing material, which eliminates damage to the human body and reduces costs. The device provides a cloud model processing system that is convenient Users download and upload 3D models. Simple operations enable users to quickly grasp the use of equipment, experience the fun of 3D printing, and cultivate interest.

Description of the drawings

Figure 1 is a three-dimensional schematic diagram of the DLP printer of the present invention;

Figure 2 A schematic diagram of the working state of the DLP printer of the present invention;

Figure 3 A schematic diagram of the non-working state of the DLP printer of the present invention;

Fig. 4 is a schematic diagram of the fixing seat of the pattern generator of the present invention;

Figure 5 is a schematic diagram of the folding frame of the DLP printer of the present invention;

Figure 6 is an overall cross-sectional view of the DLP printer of the present invention;

Fig. 7 is a schematic diagram of the structure of the fixture for the fixing base of the pattern generator of the present invention;

Fig. 8 is a diagram of the use state of the DLP printer of the present invention;

Figure 9 is a structural block diagram of the control system of the present invention;

Figure 10 is a working flow chart of the control system of the present invention.

Among them, 100, base; 140, substrate knurled screw; 150, substrate positioning pin; 160, power port; 170, PLC self-locking power switch; 180, knurled tightening screw; 190, rotating shaft; 200, graphics generation Maker holder; 210, pattern generator holder; 220, pattern generator holder fixture; 221, positioning clip; 222, gear; 300, pattern generator; 400, forming tank; 410, storage room; 420, Translucent film; 500, folding frame; 520, XY axis sliding table; 530, rotating shaft; 600, forming working surface; 700, control unit; 800, light shield.

detailed description

The present invention will be further described in detail below in conjunction with specific embodiments, which are to explain rather than limit the present invention.

As shown in Figure 1 and Figure 6, a DLP printer includes a base 100, a pattern generator fixing base 200, a pattern generator 300, a forming tank 400, a folding frame 500 and a forming working surface 600, the base 100 and the folding frame 500 is connected by a rotating shaft, the base 100 and the folding frame 500 can rotate relatively, the forming groove 400 is arranged on the base 100, the pattern generator fixing seat 200 is arranged in parallel at the lower end of the forming groove 400, and the pattern generator 300 is fixed on the pattern generator. On the seat 200, the forming working surface 600 is mounted on the folding frame 500 through the XY axis sliding table 520, the forming working surface 600 is detachably fixed on the XY axis sliding table 520, and the forming working surface 600 is fixed to the XY axis sliding table 520 through movable pins. It is easy to disassemble and replace the forming working surface;

The pattern generator 300 serves as a light source;

It also includes a hood 800 for shading the light of the entire device. The hood 800 is set on the outside of the printer. The hood is replaced according to the different wavelengths used by the pattern generator to prevent the molding material in the molding tank from curing with visible light; also includes control Unit 700, the control unit is arranged on the base 100, the control unit is used to control the movement of the XY axis sliding table 520 to realize the intelligent control of the device, the control unit is connected with a wireless connection module and a voice module, and the voice module is used for voice prompts; In this preferred example, the control unit adopts a single-chip microcomputer;

The forming tank 400 includes a storage chamber 410 and a light-transmitting film 420, the light-transmitting film 420 is arranged at the lower end of the storage chamber 410, and the upper end of the light-transmitting film 420 is placed with forming materials;

As shown in Figures 2 and 3, the folding frame 500 is a door-shaped folding frame or an L-shaped folding frame. A folding frame groove is provided on the base 100, and the folding frame 500 and the base 100 are rotatably connected by a rotating shaft 530. , In the working state, the folding frame 500 and the machine base 100 are arranged relatively perpendicularly, and the working surface of the forming working surface 600 is parallel to the pattern generator 300 on the machine base 100; in the non-working state, the folding frame 500 is arranged relatively parallel to the machine base 100 , The forming working surface 600 is separated from the XY axis sliding table 520, which reduces the volume of the overall device; in the non-working state, the folding frame 500 rotates into the folding frame groove on the base 100, and the folding frame 500 and the base 100 form An overall plane structure, thereby reducing the volume of the whole machine;

As shown in Figure 4, the pattern generator fixing seat 200 includes a pattern generator fixing seat 210 and a pattern generator fixing seat fixture 220. The lower end of the base 100 is provided with a placement slot, and the pattern generator fixing seat 210 can be slidably placed on the machine. In the placement slot at the lower end of the seat 100;

The pattern generator fixture 220 automatically adjusts the pattern generator 300 of different sizes to the geometric center position in the pattern generator fixture 210. As shown in FIG. 7, the pattern generator fixture 220 is provided with two The sliding positioning clamp 221 is driven by a transmission gear 222 between the two positioning clamps 221. The opposite sides of the two positioning clamps 221 are respectively provided with a rack and pinion structure. The gear 222 can be rotatably installed between the two positioning clamps 221. The gear 222 They are respectively engaged with the rack structures on the two positioning clamps 221 to ensure accurate center positioning of the pattern generator; the pattern generator 300 is placed between the two positioning clamps 221, and by pulling one positioning clamp 221, two positioning clamps 221 Move at the same time, so as to ensure that the pattern generator 300 between the two positioning clamps 221 is in the center position of the pattern generator fixing seat clamp 220;

As shown in Figure 5, both the folding frame 500 and the machine base 100 are provided with locking holes 540, which are locked by a locking bolt, and are used for locking the folding frame 500 and the machine base 100 in working and non-working states;

As shown in Figure 6, the XY-axis sliding table 520 includes an X-axis beam and a Y-axis moving frame. One end of the X-axis beam is fixed on the Y-axis moving frame, and the X-axis beam is moved up and down by the Y-axis moving frame;

The Y-axis moving frame includes a driving motor 540 fixed at the upper or lower end of the folding frame 500 and a driven wheel 550 fixed at the lower or upper end of the folding frame 500. The output wheel of the driving motor 540 and the moving wheel 550 are connected by a timing belt 560, One end of the X-axis beam is fixed on the timing belt 560, and the drive motor 540 drives the timing belt 560 to move, thereby driving the X-axis beam to move up and down. The drive motor 540 uses a stepping motor and is controlled by the control unit; or the Y-axis moving frame uses gear teeth The Y-axis moving frame can rotate with the folding frame 500. The folding frame 500 is equipped with a slideway. The X-axis beam is fixed with a sliding block that cooperates with the slideway. The X-axis beam is driven by the Y-axis moving frame. Slide up and down along the slideway on the folding frame 500, thereby ensuring the stability of the vertical movement of the X-axis beam.

Based on the DLP printer of the present invention, a mobile device is used as a light source, and a non-toxic water-soluble visible light photosensitive resin is used as a printing material, thereby eliminating damage to the human body and reducing costs.

As shown in Figures 1 to 5, when in use, the folding frame 500 is rotated relative to the base 100 to a vertical state, the folding frame 500 and the base 100 are locked by a locking bolt to prevent rotation, and then the forming working surface 600 is fixed On the folding frame 500, place the pattern generator 300 on the pattern generator holder 200, and then slide the pattern generator holder 200 into the placement slot of the base 100 to realize the parallel placement of the pattern generator 300. Then the XY-axis sliding table 520 controls the up and down movement of the forming work surface 600, contacts the forming material in the forming groove 400, and uses the pattern generator 300 at the bottom of the base 100 to generate a light source to realize the formation of the forming material on the forming surface 600. Stacking, the XY-axis sliding table 520 reciprocates to realize the forming process. After the forming is completed, the forming working surface 600 is disassembled from the folding frame 500, and the base 100 and the folding frame 500 are folded to reduce the volume of the overall device and reduce the overall device Weight and easy to carry.

The visible light resin printing method using DLP printer is as follows,

1) Set up the printing platform, rotate the folding frame 500 to the vertical position relative to the base 100, lock the folding frame 500 and the base 100 with a locking bolt to prevent rotation, and then fix the forming working surface 600 on the folding frame 500 , Place the pattern generator 300 on the pattern generator holder 200, and then slide the pattern generator holder 200 into the placement slot of the base 100 to realize the parallel insertion of the pattern generator 300;

2). The printing parameters are transmitted to the control unit, and the control unit controls the working path of the XY axis sliding table 520 according to the printing parameters;

3): Material addition and printing, visible light photosensitive resin material is added to the resin tank, set to the control unit according to the printing parameters, the control unit accepts the instruction and is ready to start printing;

4): Put the pattern generator 300 on the pattern generator fixing seat 200 and fix it, and use a light shield to cover the printer to prevent the resin from being exposed to visible light to cure;

5): After printing, there will be a voice prompt, wait for the voice prompt that the molded part is fully cured. Remove the hood 800, remove the forming working surface 600, and separate the molded part from the bottom surface of the forming working surface. The remaining resin in the resin tank can be poured out for recycling , Then use clean water to clean the resin tank, fold and retract the printing platform.

As shown in Figure 9, a DLP printer control system of the present invention includes a cloud server and a mobile-end host computer controller. The DLP printer acts as a control unit 700 that interacts with the mobile-end host computer controller, and the control unit 700 is the lower Machine equipment controller.

Among them, the cloud server is used to store the model-level cut graph printing data, and a model database is established in the cloud server to store a large number of models that have been sliced; the cloud server also provides a web monitoring page for device status, which is convenient for users to observe directly. Understand the operating status and fault information of the equipment during model printing.

The upper computer controller of the mobile terminal includes a layered image display module, a control instruction module, and a device state storage module. Among them, the layered image display module is the graphics generator 300, which is the upper computer mobile device; the layered image display module will be from the cloud The sliced images of the model layers in the server model library are displayed sequentially, which are used to cure the photosensitive resin material layer by layer during the device printing process; the control instruction module first sets the basic forming parameters before the device printing starts, including the curing time and layer thickness information of each layer . In the equipment printing process, the control instruction module sends instructions to control the movement of the equipment's forming working surface to the lower computer controller through the short-range communication. Send it to the slice image display module to display the slice image of each layer of the model for a certain period of time, and then control the forming working surface to rise first and then fall; the equipment state storage module uses the near field communication method to collect the operating status information of the lower computer equipment controller Store it and transmit the information to the cloud server to provide information for the Web status monitoring page;

The lower computer equipment controller includes a moving part drive module and a device state acquisition module; it receives control instructions sent by the upper computer through short-range wireless communication, and the moving part drive module controls the forming work surface of the device to cooperate with the upper computer slice image display module to move . At the same time, the equipment status collection module collects the current layer number and equipment fault information, and sends it to the upper computer controller through short-range wireless communication.

The equipment status information includes the current printing progress and equipment abnormality information, and the model layer cut drawing printing data includes equipment reset instructions, pulling motion on the forming work surface and motion parameter settings.

The upper computer controller on the mobile terminal adopts mobile devices with interconnection capabilities to realize the cloud download of the model, including mobile phones, tablets and industrial embedded devices. The upper computer controller on the mobile terminal transmits data to the cloud server through the mobile network or Wi-Fi. The upper computer controller of the mobile terminal performs data transmission with the lower computer device controller through the Bluetooth communication protocol.

The microcontroller (MCU) of the control board of this device uses ATmega328p, the Bluetooth communication module uses the Ti CC2540 chip that meets the Bluetooth 4.0 specification, and the motor drive module uses the A4988 stepper motor drive chip. The control process is as follows: MCU receives the control command sent by the host computer through Bluetooth, analyzes it, converts it into the pulse and direction signal of the pin, and sends it to the corresponding pin of the motor driver, so as to control the motor to rotate and cooperate with the actuator. Movement of the forming face.

The device status collection module of the upper computer controller of the mobile terminal obtains the device status information fed back by the lower computer device controller through the wireless transmission module, including the work progress information and fault information of the device; the control module uses the network interconnection function to collect the information The current printing layer information of the device is stored locally, and the printing progress and fault information are transmitted to the cloud server. The current printing layer number of the device stored locally is used to continue printing when the device terminates the printing process abnormally. The user can understand the current working status of the device and the fault information of the device by accessing the web-side status monitoring page provided by the server; since each device has a complete set of wireless transmission function modules, the user can use the web monitoring module of the cloud server Know the working status of your equipment. In addition, for device administrators, using the web-side monitoring module can view the working status of multiple devices they manage, that is, multiple devices and cloud servers form a distributed cluster monitoring system, which can be expanded to distributed cluster control in the future system.

Among them, the upper computer controller of the mobile terminal and the lower computer device controller exchange information through a short-range wireless communication protocol.

According to the down-illuminated structure of this equipment, the light source is placed under the forming working surface, and the resin in the liquid tank above the light source is irradiated to realize the curing of the material. The work flow of the equipment control system is shown in Figure 10 in the form of a flowchart. Out, including:

Step 1: Unfold the DLP printer from the portable folding state to the working state, including raising the folding frame 500 of the gantry structure, installing and leveling the forming work surface, filling resin material and shading;

Step two, connect the power adapter of the DLP printer to the power port of the device, and use the mobile host controller to connect and pair through the short-range wireless communication protocol after powering on the DLP printer;

Step 3: Use the mobile host computer controller to access the model database in the cloud server to select the model to be printed, and download a set of sliced graphics data sliced according to the given layer thickness from the model stored in the cloud server to the mobile host computer controller in;

Step 4: Set the basic printing parameters of the DLP printer, including the preparation time before printing, the exposure time of each layer of image and the layer thickness;

Step 5, enter the printing page, the mobile terminal host computer controller sends a reset signal to the DLP printer to make the motion platform return to zero, that is, the forming work surface moves downwards until it touches the limit switch at the bottom, and the forming work surface stops moving , Feedback a reset complete signal to the mobile device;

Step 6, after the reset is completed, the DLP printer will start to prepare for printing countdown after receiving a completion signal. At this time, the graphics generator 300 needs to be placed in the tray below the resin tank, that is, the storage chamber 410;

Step 7: Starting from the zero position, the drive image display module of the host computer controller on the mobile terminal starts to display the two-dimensional slice image of the model, and uses the image to irradiate the visible light photosensitive resin in the resin tank to cure it on the stationary working surface Above, the static time of the forming working surface, that is, the duration of the image display, is determined by the curing speed of the resin material. After the set exposure time is irradiated to each layer of the model slice image, a control command is sent to the motor in the lower machine to control the movement of the forming working surface. After the specified layer height, the forming working surface completes the given motion instruction, the current printing layer information is fed back to the mobile terminal host computer for recording, and the mobile terminal host computer sends the collected equipment status information through the Web of the cloud server. The user displays the printing progress and printing exception information. This process is repeated until the model is printed and the forming work surface moves upward to the top of the device, waiting for the user to take the part.

Combining the above-mentioned DLP printer and its control system, a visible light resin printing method of the present invention specifically includes the following steps:

Step 1. Preparation for printing. Raise the folding frame 500. The folding frame 500 rotates 90° in the space through the folding mechanism. When the folding frame 500 is rotated to the vertical position with the base 100, rotate the knurling on both sides of the base 100 Tighten the screw 180 to fully clamp the folding frame 500;

The forming work surface 600 is installed and leveled, the base plate positioning pin 150 is inserted to make the forming work surface 600 parallel to the base 100, and the base plate knurled screws 140 are tightened so that the forming work surface 600 is completely clamped;

Use the power adapter to plug into the power port 160 to power the DLP printer, turn on the PLC self-locking power switch 170, use the mobile terminal host computer to pair the DLP printer through the wireless communication protocol; add the visible light photosensitive resin material to the storage chamber 410 and Perform shading; use a shading cover 800 to cover the storage chamber 410 to prevent visible light-sensitive resin materials from being cured by light;

Use the mobile host computer to access the model database in the cloud server to select the model to be processed for download; use the mobile host computer to set the basic printing parameters of the lower computer DLP printer, including the layer thickness and the exposure time of each layer image.

Step 2. Firstly, the pattern generator 300 is placed on the pattern generator fixed seat 210, and clamped by the pattern generator fixed seat fixture 220; choose to start printing on the pattern generator 300, and the upper computer controller of the mobile terminal gives the DLP printer Send a reset signal to make the XY-axis slide 520 perform the zero-return operation. After the zero-reset is completed, the DLP printer will start to prepare for printing countdown after receiving a completion signal. At this time, the graphics generator fixed mount 210 is placed in the storage material Below the chamber 410; starting from the zero position, the drive graphics generator 300 of the upper computer controller of the mobile terminal starts to display the two-dimensional slice image of the model, and uses the image to irradiate the visible light photosensitive resin in the storage chamber 410 to make it solidify in a static state On the forming working surface 600, the static time of the forming working surface 600, that is, the duration of the image display, is determined by the curing speed of the resin material. After the set exposure time is irradiated to each layer of the model slice image, a control command is sent to the motor to control the forming working surface 600 moves to a given layer height, after the forming working surface 600 completes the given movement instruction, the current printing layer information is fed back to the mobile terminal host computer for recording, and the mobile terminal host computer will collect the equipment status information through the cloud server The web terminal displays printing progress and printing exception information to users; the mobile terminal host computer and DLP printer communicate with each other until the printing is completed.

Step 3, model processing, after the printing is completed, remove the forming working surface 600, remove the printed model from the forming working surface 600, and put the model in alcohol to clean it.

Claims (20)

1. A DLP printer, which is characterized by comprising a base (100), a pattern generator fixing seat (200), a pattern generator (300), a forming groove (400), a folding frame (500) and a forming working surface (600) , And a control unit (700) for controlling the up and down movement of the XY-axis sliding table (520);

   The base (100) and the folding frame (500) are connected by a rotating shaft, the base (100) and the folding frame (500) can rotate relative to each other, the forming groove (400) is arranged on the base (100), and the pattern generator fixing base ( 200) is arranged in parallel at the lower end of the forming groove (400), the pattern generator (300) is placed on the pattern generator fixing seat (200), and the forming working surface (600) is installed on the folding frame (500) through the XY axis sliding table (520) ), the forming working surface (600) can be detachably fixed on the XY-axis sliding table (520); the control unit is arranged on the machine base (100).
2. The DLP printer according to claim 1, wherein the forming working surface (600) is fixed on the XY-axis sliding table (520) by means of movable pins.
3. The DLP printer according to claim 1, further comprising a light shield (800) for shading the light of the whole device, and the light shield (800) is sleeved on the outside of the printer.
4. The DLP printer according to claim 1, wherein the forming tank (400) comprises a storage chamber (410) and a light-transmitting film (420), and the light-transmitting film (420) is arranged in the storage chamber (410) At the lower end, a forming material is placed on the upper end of the light-transmitting film (420).
5. The DLP printer according to claim 1, wherein the folding frame (500) is a door-shaped folding frame or an L-shaped folding frame, and the base (100) is provided with a groove for the folding frame (500), and the folding frame (500) is rotatably connected with one side of the base (100) through a rotating shaft (530).
6. The DLP printer according to claim 1, wherein the pattern generator fixing seat (200) comprises a pattern generator fixing seat frame (210) and a pattern generator fixing seat fixture (220), and the base (100) The lower end is provided with a placing slot, and the fixed seat frame (210) of the pattern generator (300) can be slidably placed in the placing slot at the lower end of the machine seat (100).
7. The DLP printer according to claim 1, characterized in that, the pattern generator fixing seat fixture (220) is provided with two slidable positioning clamps (221), and the two positioning clamps (221) pass through transmission The gear (222) is driven. The opposite sides of the two positioning clamps (221) are respectively provided with a rack structure. The gear (222) can be rotatably installed between the two positioning clamps (221). The gear (222) is connected to the two positioning clamps (221) respectively. The rack structure on the clamp (221) engages.
8. The DLP printer according to claim 1, wherein the XY-axis sliding table (520) comprises an X-axis beam and a Y-axis moving frame, one end of the X beam is fixed on the Y-axis moving frame, and the X-axis beam passes through the Y-axis. The moving frame drives up and down movement.
9. The DLP printer according to claim 8, wherein the Y-axis movable frame includes a drive motor (540) fixed at the upper or lower end of the folding frame (500) and a drive motor (540) fixed at the lower or upper end of the folding frame (500) The driven wheel (550) of the driving motor (540) is connected with the driving wheel (550) through a timing belt (560), and one end of the X-axis beam is fixed on the timing belt (560).
10. A DLP printer control system, which is characterized in that it includes a cloud server and a mobile-end host computer controller. The DLP printer acts as a lower computer and interacts with the mobile-end host computer controller through a control unit (700).

    The cloud server includes a model library that stores the slice data of the model to be printed and a Web status monitoring page that monitors the operating status of the device, which is used to transmit the model slice data to the mobile host controller and collect the status information of the device;

    The upper computer controller of the mobile terminal includes a slice image display module, a control instruction module and a device state storage module; the slice image display module is used to sequentially display the model layer slice images; the control instruction module is used to form the working surface (600) The motion instruction is sent to the control unit (700); the device status storage module is used to store the DLP printer operating status information fed back by the control unit (700), and at the same time transmit the information to the cloud server for the web status monitoring page;

    The control unit (700) includes a moving part drive module and an equipment state acquisition module; the moving part drive module is used to receive control instructions sent by the upper computer to control the forming working surface (600) of the equipment to move; at the same time, the equipment state acquisition module uses To collect the current layer number and equipment failure information, and send it to the mobile terminal upper computer controller.
11. The control system of a DLP printer according to claim 10, wherein:

    The cloud server transmits model slice data to the mobile-end host computer controller through long-distance wireless communication, and collects the device status information obtained by the mobile-end host computer from the control unit (700);

    The upper computer controller of the mobile terminal will sequentially display the sliced images of the model layer in the cloud server model library for curing the photosensitive resin material layer by layer during the DLP printing process; the control instruction module first sets the basic forming parameters before the DLP printing starts. Including the curing time and layer thickness information of each layer; in the DLP printing process, the control instruction module sends instructions to control the movement of the forming working surface (600) to the control unit (700) through short-range communication; and sends it to the image display on the slice After the module displays the slice image of each layer of the model for a certain period of time, it controls the forming working surface to rise first and then fall; the device status storage module stores the DLP printer operating status information collected by the control unit (700) through short-range communication, and at the same time the information Transmit to the cloud server to provide information for the web status monitoring page;

    The control unit (700) receives the control instructions sent by the upper computer through short-range wireless communication, and the moving part drive module controls the forming working surface (600) to cooperate with the upper computer slice image display module to move; at the same time, the equipment status acquisition module collects The current layer number and equipment fault information are sent to the upper computer controller of the mobile terminal through short-range wireless communication.
12. The control system of a DLP printer according to claim 10, characterized in that the equipment status information includes current printing progress and equipment abnormality information, and the model layer cut drawing printing data includes equipment reset instructions, forming working surface (600) pull up Sports and sports parameter settings.
13. The control system of a DLP printer according to claim 10, wherein the upper computer controller of the mobile terminal adopts a mobile device with Internet access capability to realize model cloud download and image display capability as a light source.
14. The control system of a DLP printer according to claim 13, wherein the upper computer controller of the mobile terminal adopts a mobile phone, a tablet computer or an industrial embedded device.
15. The control system of a DLP printer according to claim 10, wherein the upper computer controller on the mobile terminal performs data transmission with the cloud server through a mobile network or Wi-Fi; and performs data transmission with the lower computer device controller through a Bluetooth communication protocol. data transmission.
16. A visible light resin printing method, characterized in that the DLP printer according to any one of claims 1-9 and the control system according to any one of claims 10-16 are used; and the method comprises the following steps:

    Step 1), preparation for printing, including raising the folding frame (500), installing and leveling the forming working surface (600), filling resin material and shading, powering on the DLP printer, connecting and matching the mobile terminal, and the mobile terminal The upper computer downloads the model stored in the cloud server and sets the basic printing parameters of the DLP printer;

    Step 2), first place the pattern generator (300) on the pattern generator fixed seat (210), and clamp it by the pattern generator fixed seat fixture (220); starting from the zero position, the upper computer controller of the mobile end The pattern generator (300) is driven to display the two-dimensional slice image of the model, and the image is used to irradiate the visible light photosensitive resin in the storage chamber (410) to cure it on the stationary forming working surface (600). After the model slice image is irradiated with the set exposure time, it sends a control instruction to the motor to control the movement of the forming working surface (600) to a given layer height, and the mobile terminal host computer and the DLP printer communicate with each other until the printing is completed;

    Step 3), model processing, including removing and cleaning up the model after printing.
17. The visible light resin printing method according to claim 16, wherein the specific implementation method of step 1) is as follows:

    Raise the folding frame (500), the folding frame (500) rotates 90° in space through the folding mechanism, and when the folding frame (500) rotates to the vertical position with the base (100), rotate both sides of the base (100) The knurled tightening screw (180) completely clamps the folding frame (500);

    The forming work surface (600) is installed, the base plate positioning pin (150) is inserted so that the forming work surface (600) is parallel to the base (100), and the base plate knurled screw (140) is tightened so that the forming work surface (600) is completely clamped ；

    Use the power adapter to insert the power port (160) to power the DLP printer, turn on the PLC self-locking power switch (170), use the mobile terminal host computer to pair the DLP printer through the wireless communication protocol; add the visible light photosensitive resin material to the storage material Room (410);

    Use the mobile host computer to access the model database in the cloud server to select the model to be processed for download; use the mobile host computer to set the basic printing parameters of the lower computer DLP printer, including the layer thickness and the exposure time of each layer image.
18. The visible light resin printing method according to claim 16, characterized in that a light shield (800) is used to cover the storage chamber (410) to prevent the visible light photosensitive resin material from being cured by light.
19. The visible light resin printing method according to claim 16, wherein the specific implementation method of step 2) is as follows:

    First, the pattern generator (300) is placed on the pattern generator fixed seat (210) and clamped by the pattern generator fixed seat fixture (220); select the pattern generator (300) to start printing, and the upper computer at the mobile end The controller sends a reset signal to the DLP printer to make the XY axis slide (520) return to the zero position. After the return to the zero position is completed, the DLP printer receives a completion signal and starts to prepare for the countdown to print. At this time, the graphics generator is fixed. The pedestal (210) is placed under the storage chamber (410); starting from the zero position, the driving graphics generator (300) of the upper computer controller at the mobile end starts to display the two-dimensional slice image of the model, and the storage chamber is illuminated with this image The visible light photosensitive resin in (410) makes it solidify on the stationary forming working surface (600). The static time of the forming working surface (600), that is, the duration of image display, is determined by the curing speed of the resin material. After the model slice image is irradiated with the set exposure time, it sends a control command to the motor to control the forming working surface (600) to move the given layer height. After the forming working surface (600) completes the given movement command, the current printing layer number information The feedback is sent to the mobile host computer for recording. The mobile host computer displays the collected device status information to the user through the Web of the cloud server to display the printing progress and printing exception information; the mobile host computer and the DLP printer communicate with each other until the printing is completed.
20. A visible light resin printing method according to claim 16, characterized in that the specific implementation method of step 3) is as follows: after printing is completed, remove the forming working surface (600), and remove it from the forming working surface (600) After printing the model, put the model in alcohol to clean it.

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