Precise metal 3D printing device
By printing the outline first and then filling it with metal material in 3D metal printing, combined with fine outline and laser heating, the problems of high energy consumption and long forming time are solved, realizing efficient and high-precision printing of multiple materials, which is applicable to jewelry, industrial design, architecture, engineering, automotive, aerospace, dental and medical fields.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-22
- Publication Date
- 2026-03-06
AI Technical Summary
Existing 3D metal printing technology suffers from high energy consumption, difficulty in controlling the size and shape of molten metal, long forming time, and difficulty in achieving fine structures. Furthermore, the multi-material printing process is complex, affecting the size and accuracy of the model.
The process involves first printing the outline, then filling the outline grooves with metal material and heating and melting it. It combines fine outline printing with the use of multiple materials, uses lasers and beam expanders for precise heating, and utilizes platform drive and detection mechanisms to ensure accuracy.
It enables rapid and efficient printing of various materials, ensuring high precision and surface refinement of metal components. It features good controllability, high stability, and strong batch replication capability, thereby improving printing efficiency and forming quality.
Smart Images
Figure CN223970862U_ABST
Abstract
Description
[Technical Field]
[0001] This utility model relates to the field of 3D printing equipment technology, and in particular to a precision metal 3D printing device. [Background Technology]
[0002] 3D printing technology, also known as additive manufacturing, is a type of rapid prototyping technology. It uses a computer-designed digital model file as a basis and the material of the object itself, such as nylon, plaster, metal, or rubber, as "ink" to build parts layer by layer. It typically utilizes methods such as Fused Deposition Modeling (FDM), Electron Beam Fabrication (EBF), and Layered Object Manufacturing (LOM) to create objects by printing ink materials such as plastic, metal, or ceramic powders layer by layer.
[0003] For 3D printing of pure metals and alloys, three typical processes are currently employed: Selective Laser Sintering (SLS), Laser Engineering Net Shaping (LENS), and Electron Beam Selective Melting (EBSM). All these processes use metal powder as printing ink and involve cooling and shaping in a gas atmosphere. 3D metal printing technology, which integrates computer-aided design / computer-aided manufacturing (CAD / CAM) technology, materials science, and precision mechanical control, significantly shortens product development cycles, accelerates new product manufacturing, and reduces costs compared to traditional additive manufacturing. It has broad application prospects in jewelry, industrial design, architecture, engineering and construction (AEC), automotive, aerospace, dental and medical industries, and other fields. Therefore, 3D metal printing is an important development direction for current metal manufacturing technology.
[0004] However, since conventional metal materials such as copper and aluminum have extremely high melting points, they often require extremely high sintering temperatures, resulting in high energy consumption and difficulty in control during the printing process. In addition, the structural components are not effectively cooled by conventional air, and the solidification time of the structural components is too long. When using laser to heat the metal powder during the printing process, it is difficult to control the size and shape of the melted metal, which urgently needs improvement.
[0005] In addition, the current 3D metal printing technology usually uses the same material throughout the entire molding process. The advantage of this is that the molding process is convenient. Some other methods use pre-processing to form the model first, and then post-processing to increase the physical properties of the model after molding, such as high-temperature sintering and secondary curing. This can improve the physical properties of some printed models, but it will affect the size of the model after the initial molding and will not be able to complete the molding of fine metal structures.
[0006] Therefore, this utility model was developed to address the aforementioned problems. [Utility Model Content]
[0007] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a precision metal 3D printing device. This device first prints a shaped outline, and then fills the grooves formed by the outline with 3D printing metal raw materials to melt the metal and form 3D printed metal components. This method can realize the printing of various metal and non-metal materials. In addition, the outline is printed with precision, and the 3D printed metal components are fully melted by filling to achieve rapid 3D printing. It has the characteristics of batch replication, dense metal, high surface control precision, good controllability, high stability, and high printing efficiency. At the same time, it can ensure the fineness of the surface of the 3D printed metal components and realize high-precision additive manufacturing of 3D printed composite metal components.
[0008] This utility model is achieved through the following technical solution:
[0009] A precision metal 3D printing apparatus, comprising:
[0010] frame;
[0011] Molding platform 1, which is movably mounted on the frame;
[0012] The contour printing and forming mechanism 2 includes a contour printing and forming component 21 for printing a contour 200 on a forming platform 1 according to the required shape of the 3D printed metal component 100, and a contour heating and forming component 22 for heating the contour 200 material during the printing and forming process. The shape of the contour 200 groove fence is adapted to the shape of the 3D printed metal component 100 to be printed, and the contour 200 restricts the flow of molten 3D printed metal raw material inside the contour 200 groove.
[0013] The metal component printing and forming mechanism 3 includes a material conveying mechanism 31 for conveying 3D printing metal raw materials into the contour 200 groove on the forming platform 1, and a material heating and forming mechanism 32 for heating and melting the 3D printing metal raw materials.
[0014] A platform drive mechanism, located on the frame, is used to drive relative movement between the forming platform 1 and the contour printing forming mechanism 2 and the metal component printing forming mechanism 3 to complete the printing of the contour 200 and the metal component 100.
[0015] As described above, in a precision metal 3D printing device, the contour printing and forming mechanism 2 and the metal component printing and forming mechanism 3 are located above the forming platform 1. The platform driving mechanism is used to drive the forming platform 1 to move along the Z-axis of the frame and complete the printing of the contour 200 and the 3D printed metal component 100 by coordinating rising and falling. It also includes an axial driving mechanism 4 for driving the contour printing and forming mechanism 2 and the metal component printing and forming mechanism 3 to move along the X-axis and Y-axis of the frame.
[0016] As described above, in a precision metal 3D printing device, the raw material heating and forming mechanism 32 includes a raw material preheating component; the raw material heating and forming mechanism 32 also includes a laser emitting unit 321, a beam expander 322, and a galvanometer 323. The laser emitting unit 321 is used to emit laser light, and the beam expander 322 is located between the emitting end of the laser emitting unit 321 and the galvanometer 323 to increase the diameter of the laser beam emitted by the laser emitting unit 321 and focus it onto the galvanometer 323. The galvanometer 323 is used to draw a light image of the laser beam with increased diameter and irradiate it onto the forming platform 1 to sinter and melt the corresponding 3D printed metal raw material.
[0017] As described above, in a precision metal 3D printing device, a forming chamber 11 is provided on the frame, and the forming platform 1 is located inside the forming chamber 11.
[0018] As described above, a precision metal 3D printing device further includes a printing detection mechanism 5 for monitoring the contour 200 during the printing process to control the contour printing assembly 21 to correct the printing position of the contour 200 in real time.
[0019] As described above, in a precision metal 3D printing device, the printing inspection mechanism 5 is a CCD camera.
[0020] This utility model also provides a precision metal 3D printing method, wherein the printing method uses a precision metal 3D printing device as described above, and includes the following steps:
[0021] S1. The platform driving mechanism drives the molding platform 1 to move relative to the contour printing molding mechanism 2 and the metal component printing molding mechanism 3, so that there is a 2D curing layer thickness spacing between the molding platform 1 and the contour printing molding mechanism 2 and the metal component printing molding mechanism 3.
[0022] S2. The 2D curing layer of the printed contour 200 is formed by printing the contour 200 on the forming platform 1 according to the required shape of the 3D printed metal component 100, and the 2D curing layer of the contour 200 is heated and cured by the contour heating and forming component 22 during the printing process.
[0023] S3. The 2D cured layer of the 3D printed metal component 100 is printed. The raw material heating and forming mechanism 32 heats and melts the 3D printed metal raw material in the raw material conveying mechanism 31. Then the raw material conveying mechanism 31 conveys the heated and melted 3D printed metal raw material to the contour 200 groove on the forming platform 1. After cooling, the 2D cured layer of the 3D printed metal component 100 is obtained.
[0024] Alternatively, the material conveying mechanism 31 conveys the 3D printing metal material to the contour 200 groove on the forming platform 1, and the material heating and forming mechanism 32 heats and melts the 3D printing metal material in the contour 200 groove, and after cooling, a 2D solidified layer of the 3D printed metal component 100 is obtained.
[0025] S4. Repeat steps S1 to S3 above until the outline 200 and the 3D printed metal component 100 are printed.
[0026] In the precision metal 3D printing method described above, in step S3, the 3D printing metal raw material is zinc. The zinc in the raw material conveying mechanism 31 is heated and melted by the raw material heating and forming mechanism 32, and the heating temperature is 450-480°C. Then, the heated and melted zinc is conveyed to the contour 200 groove on the forming platform 1 by the raw material conveying mechanism 31. After cooling, a 2D cured layer of the 3D printed metal component 100 is obtained.
[0027] In the precision metal 3D printing method described above, in step S3, the 3D printing metal raw material is metal powder. The metal powder is laid in the groove of the contour component 200 on the forming platform 1 by the raw material conveying mechanism 31. Then, the metal powder in the groove of the contour 200 is heated and melted by the raw material heating and forming mechanism 32. After cooling, a 2D solidified layer of the 3D printed metal component 100 is obtained.
[0028] As described above, in a precision metal 3D printing method, the raw material heating and forming mechanism 32 includes a raw material preheating component; the raw material heating and forming mechanism 32 further includes a laser emitting unit 321, a beam expander 322, and a galvanometer 323. The laser emitting unit 321 emits laser light, and the beam expander 322 is located between the emitting end of the laser emitting unit 321 and the galvanometer 323 to increase the diameter of the laser beam emitted by the laser emitting unit 321 and focus it onto the galvanometer 323. The galvanometer 323 is used to focus the increased laser beam diameter onto the galvanometer 323. A laser beam is used to create a light image that is then projected onto the forming platform 1. In step S3, the 3D printing metal material is metal powder. The metal powder is laid in the groove of the contour 200 on the forming platform 1 by the material conveying mechanism 31. Then, the metal powder in the groove of the contour 200 is preheated by the material preheating component. After that, the preheated metal powder is heated and melted by the laser emitting unit 321, the beam expander 322, and the galvanometer 323 working together. After cooling, a 2D solidified layer of the 3D printed metal component 100 is obtained.
[0029] Compared with the prior art, the present invention has the following advantages:
[0030] 1. This utility model adopts a printing and forming method in which the outline is first printed by an outline printing and forming component, then the 3D printing metal raw material is filled into the outline groove by a raw material conveying mechanism, and finally the 3D printing metal raw material is heated and melted by a raw material heating and forming mechanism, and then cooled to obtain the 3D printed metal component. This method enables the printing of various materials. In addition, the outline is printed with precision, and the 3D printed metal component is printed by filling, which enables rapid printing. It has the characteristics of simple processing, batch replication, good controllability, high stability, and high printing efficiency. At the same time, it can ensure the surface precision of the 3D printed metal component and realize the high-precision additive manufacturing of 3D printed composite metal components.
[0031] 2. In this utility model, a forming chamber is provided on the frame, and the forming platform is located inside the forming chamber. It can constrain the contour on the forming platform to prevent the contour from collapsing. At the same time, it can also provide a certain heat preservation effect on the contour on the forming platform and the 3D printed metal components, thereby improving the printing efficiency.
[0032] 3. This utility model preheats the metal powder using a raw material preheating component, and then melts the preheated metal powder by using a laser emitting unit, a beam expander, and a galvanometer in combination. This improves heating efficiency and thus printing efficiency. In addition, the laser emitting unit, beam expander, and galvanometer in combination enable accurate heating and printing of the printing area.
[0033] 4. The printing method of this utility model, because it adopts the above-mentioned precision metal 3D printing device, has the characteristics of simple processing, batch replication, good controllability, high stability and high printing efficiency. At the same time, it can ensure the refinement of the surface of 3D printed metal components and realize high-precision additive manufacturing of 3D printed composite metal components. [Attached Image Description]
[0034] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:
[0035] Figure 1 This is a perspective view of the present invention.
[0036] Figure 2 This is the front view of the present invention.
[0037] Figure 3 This is an exploded view of the present invention.
[0038] Figure 4 This is a partial structural diagram of the raw material heating and forming mechanism in this utility model.
[0039] Figure 5 This is a cross-sectional view of the outline and the 2D cured layer of the 3D printed metal component in this invention when they are located on the molding platform.
Detailed Implementation Methods
[0040] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.
[0041] like Figure 1-5 As shown, this utility model discloses a precision metal 3D printing device, comprising:
[0042] frame;
[0043] Molding platform 1, which is movably mounted on the frame;
[0044] The contour printing and forming mechanism 2 includes a contour printing and forming component 21 for printing a contour 200 on a forming platform 1 according to the required shape of the 3D printed metal component 100, and a contour heating and forming component 22 for heating the contour 200 material during the printing and forming process. The shape of the contour 200 groove fence is adapted to the shape of the 3D printed metal component 100 to be printed, and the contour 200 restricts the flow of molten 3D printed metal raw material inside the contour 200 groove.
[0045] The metal component printing and forming mechanism 3 includes a material conveying mechanism 31 for conveying 3D printing metal raw materials into the contour 200 groove on the forming platform 1, and a material heating and forming mechanism 32 for heating and melting the 3D printing metal raw materials.
[0046] A platform drive mechanism, located on the frame, is used to drive relative movement between the forming platform 1 and the contour printing forming mechanism 2 and the metal component printing forming mechanism 3 to complete the printing of the contour 200 and the metal component 100.
[0047] This invention employs a process where a contour printing component first prints a contour, then a material conveying mechanism fills the contour grooves with 3D printing metal material, and finally a material heating and forming mechanism melts and cools the 3D printing metal material to obtain the 3D printed metal component. This method can print various metal and non-metal materials. Furthermore, the contour is printed with precision, and the 3D printed metal component is fully melted through a filling method, achieving rapid 3D printing. It features batch replication, dense metal, high surface control precision, good controllability, high stability, and high printing efficiency. It also ensures the fineness of the 3D printed metal component surface and enables high-precision additive manufacturing of 3D printed composite metal components. The printing material for the contour is a non-metallic material, such as ceramic; the 3D printed metal material can be zinc or metal powder, etc.
[0048] like Figure 3 As shown, the contour printing component 21 is a feeding printhead, and the outer surface of the feeding printhead is circular. During the printing process, the outer surface of the feeding printhead can smooth the 3D printed metal material filled in the groove of the contour 200, thereby improving the printing accuracy of the 3D printed metal component 100.
[0049] Furthermore, the contour printing and forming mechanism 2 and the metal component printing and forming mechanism 3 are located above the forming platform 1. The platform driving mechanism is used to drive the forming platform 1 to move along the Z-axis of the frame and complete the printing of the contour 200 and the 3D printed metal component 100 through lifting and lowering. It also includes an axial driving mechanism 4 for driving the contour printing and forming mechanism 2 and the metal component printing and forming mechanism 3 to move along the X-axis and Y-axis of the frame. The platform driving mechanism and the axial driving mechanism 4 in this utility model are conventional technical structures and will not be described in detail here.
[0050] Furthermore, the raw material heating and forming mechanism 32 includes a raw material preheating component, which is not shown in the figure. The raw material preheating component can be a heating tube or a heat conduction tube, etc., which is beneficial to improve heating efficiency and thus improve printing efficiency.
[0051] like Figure 1-4 As shown, the raw material heating and forming mechanism 32 also includes a laser emitting unit 321, a beam expander 322, and a galvanometer 323. The laser emitting unit 321 is used to emit laser light. The beam expander 322 is located between the emitting end of the laser emitting unit 321 and the galvanometer 323 to increase the diameter of the laser beam emitted by the laser emitting unit 321 and focus it onto the galvanometer 323. The galvanometer 323 is used to draw a light image of the laser beam with increased diameter and irradiate it onto the forming platform 1 to sinter and melt the corresponding 3D printing metal raw material, thereby achieving accurate heating and printing of the printing area.
[0052] like Figure 1-3 As shown, the frame is provided with a forming chamber 11, and the forming platform 1 is located inside the forming chamber 11. It can constrain the contour on the forming platform to prevent the contour from collapsing, and also provide a certain heat preservation effect on the contour and 3D printed metal components on the forming platform, thereby improving the printing efficiency.
[0053] like Figure 2-4 As shown, to improve the quality of contour printing, a printing detection mechanism 5 is also included to monitor the contour 200 during the printing process and control the contour printing assembly 21 to correct the printing position of the contour 200 in real time. The printing detection mechanism 5 is a CCD camera, which can further ensure that the size of the contour 200 is within a set error range.
[0054] This utility model discloses a precision metal 3D printing method. The printing method uses a precision metal 3D printing device as described above and includes the following steps:
[0055] S1. The platform driving mechanism drives the molding platform 1 to move relative to the contour printing molding mechanism 2 and the metal component printing molding mechanism 3, so that there is a 2D curing layer thickness spacing between the molding platform 1 and the contour printing molding mechanism 2 and the metal component printing molding mechanism 3.
[0056] S2. The 2D curing layer of the printed contour 200 is formed by printing the contour 200 on the forming platform 1 according to the required shape of the 3D printed metal component 100, and the 2D curing layer of the contour 200 is heated and cured by the contour heating and forming component 22 during the printing process.
[0057] S3. The 2D cured layer of the 3D printed metal component 100 is printed. The raw material heating and forming mechanism 32 heats and melts the 3D printed metal raw material in the raw material conveying mechanism 31. Then the raw material conveying mechanism 31 conveys the heated and melted 3D printed metal raw material to the contour 200 groove on the forming platform 1. After cooling, the 2D cured layer of the 3D printed metal component 100 is obtained.
[0058] Alternatively, the material conveying mechanism 31 conveys the 3D printing metal material to the contour 200 groove on the forming platform 1, and the material heating and forming mechanism 32 heats and melts the 3D printing metal material in the contour 200 groove, and after cooling, a 2D solidified layer of the 3D printed metal component 100 is obtained.
[0059] S4. Repeat steps S1 to S3 above until the outline 200 and the 3D printed metal component 100 are printed and formed. This utility model printing method, because it uses the aforementioned precision metal 3D printing device, has the characteristics of simple processing, batch replication, good controllability, high stability, and high printing efficiency. At the same time, it can ensure the refinement of the surface of the 3D printed metal component and achieve high-precision additive manufacturing of 3D printed composite metal components.
[0060] Example 1 of the printing method:
[0061] In step S3, the 3D printing metal raw material is zinc. The zinc in the raw material conveying mechanism 31 is heated and melted by the raw material heating and forming mechanism 32, and the heating temperature is 450-480°C. Then, the heated and melted zinc is conveyed to the contour 200 groove on the forming platform 1 by the raw material conveying mechanism 31. After cooling, a 2D cured layer of the 3D printed metal component 100 is obtained.
[0062] The printing material for the contour is ceramic paste, and the contour heating and forming assembly 22 and the material heating and forming mechanism 32 are heating tubes or heat-conducting tubes. During printing, the contour printing head of the contour printing and forming assembly 21 extrudes the ceramic paste onto the forming platform according to the required shape of the 2D cured layer of the 3D printed metal component. At the same time, the heat-conducting tube heats the ceramic paste. After cooling, the ceramic paste forms the 2D cured layer of the contour 200. Then, the zinc in the material conveying mechanism 31 is heated and melted by the material heating and forming mechanism 32, and the heating temperature is 450-480°C, preferably 460 or 470°C. Afterwards, the heated and molten liquid zinc is guided by the material conveying mechanism 31 to the inner side of the 2D cured layer of the contour 200 on the forming platform 1. At this time, the liquid zinc automatically flows and levels on the inner side of the 2D cured layer of the contour 200 or is leveled by a scraping mechanism. After the leveled liquid zinc cools, it forms the 2D cured layer of the 3D printed metal component 100.
[0063] In addition, the heating of the 2D curing layer of each 3D printed metal component 100 continues, and the temperature is gradually reduced to room temperature layer by layer. The post-curing of the 2D curing layer of the 3D printed metal component 100 is completed throughout the printing process, avoiding secondary post-processing and saving time.
[0064] In addition, due to the tension effect of liquid zinc, when there is a gap or depression between the 2D cured layer of the 3D printed metal component 100 and the 2D cured layer of the contour 200, the liquid zinc will fill the gap or depression during the printing process of the next 2D cured layer of the 3D printed metal component 100, ensuring printing quality.
[0065] Example 2 of the printing method: Implementation method one:
[0066] In step S3, the 3D printing metal raw material is metal powder. The metal powder is laid in the groove of the contour component 200 on the forming platform 1 by the raw material conveying mechanism 31. Then, the metal powder in the groove of the contour 200 is heated and melted by the raw material heating and forming mechanism 32. After cooling, a 2D solidified layer of the 3D printed metal component 100 is obtained.
[0067] The printing material for the contour is ceramic paste, and the material heating and forming mechanism 32 and the contour heating and forming assembly 22 are heating tubes or heat-conducting tubes. During printing, the contour printing head of the contour printing and forming assembly 21 extrudes the ceramic paste onto the forming platform according to the required shape of the 2D cured layer of the 3D printed metal component. At the same time, the heat-conducting tube heats the ceramic paste, and the cooled ceramic paste forms the 2D cured layer of the contour 200. Then, the material conveying mechanism 31 lays metal powder into the groove of the contour 200 on the forming platform 1. After that, the material heating and forming mechanism 32 heats and melts the metal powder in the groove of the contour 200, so that the cooled metal forms the 2D cured layer of the 3D printed metal component 100.
[0068] In addition, the heating of the 2D curing layer of each 3D printed metal component 100 continues, and the temperature is gradually reduced to room temperature layer by layer. The post-curing of the 2D curing layer of the 3D printed metal component 100 is completed throughout the printing process, avoiding secondary post-processing and saving time.
[0069] In addition, due to the tension of the heated and molten metal, when there is a gap or depression between the 2D cured layer of the 3D printed metal component 100 and the 2D cured layer of the contour 200, the heated and molten metal will fill the gap or depression during the printing of the next 2D cured layer of the 3D printed metal component 100, ensuring printing quality.
[0070] Implementation method 2 of the printing method:
[0071] The raw material heating and forming mechanism 32 includes a raw material preheating component; the raw material heating and forming mechanism 32 also includes a laser emitting unit 321, a beam expander 322, and a galvanometer 323. The laser emitting unit 321 is used to emit laser light. The beam expander 322 is located between the emitting end of the laser emitting unit 321 and the galvanometer 323 to increase the diameter of the laser beam emitted by the laser emitting unit 321 and focus it onto the galvanometer 323. The galvanometer 323 is used to draw a light image of the laser beam with increased diameter and irradiate it onto the forming platform 1. In step S3, the 3D printing metal raw material is metal powder. The metal powder is laid in the contour 200 groove on the forming platform 1 by the raw material conveying mechanism 31. Then, the metal powder in the contour 200 groove is preheated by the raw material preheating component. Then, the laser emitting unit 321, the beam expander 322, and the galvanometer 323 work together to heat and melt the preheated metal powder. After cooling, a 2D solidified layer of the 3D printed metal component 100 is obtained.
[0072] The printing material for the contour is ceramic paste, and the contour heating and forming component 22 and the material preheating component are heating tubes or heat-conducting tubes. During printing, the contour printing head of the contour printing and forming component 21 extrudes the ceramic paste onto the forming platform according to the required shape of the 2D cured layer of the 3D printed metal component. At the same time, the heat-conducting tube heats the ceramic paste. After cooling, the ceramic paste forms the 2D cured layer of the contour 200. Then, the material conveying mechanism 31 lays metal powder in the groove of the contour 200 on the forming platform 1. Next, the material preheating component preheats the metal powder in the groove of the contour 200 (preheating the metal powder to near its melting point temperature). Then, the laser emitting unit 321, the beam expander 322, and the galvanometer 323 work together to heat and melt the preheated metal powder, so that the cooled metal forms the 2D cured layer of the 3D printed metal component 100.
Claims
1. A precision metal 3D printing device, characterized in that The utility model relates to a kind of 3D printing metal component forming device, including: Frame; Forming platform (1) is movably provided on frame; Contour printing forming mechanism (2), the contour printing forming mechanism (2) includes contour printing forming component (21) for printing contour (200) on forming platform (1) according to the shape required by 3D printing metal component (100) and contour heating forming component (22) for heating treatment to contour (200) material during printing forming, and the contour (200) shape is adapted to the shape of 3D printing metal component (100); Metal component printing forming mechanism (3), the metal component printing forming mechanism (3) includes raw material conveying mechanism (31) for conveying 3D printing metal raw material into the groove of contour (200) on forming platform (1) and raw material heating forming mechanism (32) for heating melting 3D printing metal raw material; Platform driving mechanism is located on frame for driving relative motion between forming platform (1) and contour printing forming mechanism (2) and metal component printing forming mechanism (3) to complete the printing of contour (200) and metal component (100).
2. The precision metal 3D printing device of claim 1, wherein Contour printing forming mechanism (2) and metal component printing forming mechanism (3) are located above forming platform (1), and the platform driving mechanism is used to drive forming platform (1) to move along the direction of Z axis of frame and complete the printing of contour (200) and 3D printing metal component (100) by lifting and lowering cooperation; It also includes axial driving mechanism (4) for driving contour printing forming mechanism (2) and metal component printing forming mechanism (3) to move along the direction of X axis and Y axis of frame.
3. The precision metal 3D printing device of claim 1, wherein Raw material heating forming mechanism (32) includes raw material preheating component;Raw material heating forming mechanism (32) also includes laser emission unit (321), beam expander (322) and galvanometer (323), laser emission unit (321) is used to emit laser, beam expander (322) is located between the emission end of laser emission unit (321) and galvanometer (323) to focus the laser beam diameter of laser emission unit (321) on galvanometer (323) after being enlarged, and galvanometer (323) is used to draw the laser beam with enlarged diameter into light image on forming platform (1) to sinter and melt corresponding 3D printing metal raw material.
4. The precision metal 3D printing device of claim 1, wherein Forming bin (11) is provided on frame, and forming platform (1) is located inside forming bin (11).
5. The precision metal 3D printing device according to any one of claims 1-4, characterized in that It also includes printing detection mechanism (5) for monitoring contour (200) during printing forming to control contour printing forming component (21) to correct contour (200) printing position in real time.
6. The precision metal 3D printing device of claim 5, wherein The printing detection mechanism (5) is CCD camera.