Continuous forming additive manufacturing device

Abstract

The invention discloses a continuous forming additive manufacturing device. Relates to the technical field of additive manufacturing. The position of the substrate heating mechanism is adjusted through the three-axis motion platform; the powder feeding mechanism comprises a horizontal multi-gradient powder spreading box body which is transversely arranged, a powder collecting cylinder which is vertically arranged and a powder storage tank, a plurality of containing cavities are formed in the horizontal multi-gradient powder spreading box body, a horizontal pushing powder mixer is arranged in each containing cavity, and the powder collecting cylinder is communicated with the powder storage tank through a pipeline; the low-power induction preheating mechanism and the high-power induction heating mechanism are sequentially communicated with the powder storage tank through pipelines, and the powder storage tank is clamped by the multi-axis manipulator; and the liquid tin circulating mechanism is used for quickly absorbing and dispersing heat of the low-power induction preheating mechanism. According to the continuous forming additive manufacturing device, uniform conveying and continuous powder supply of powder are achieved by arranging the powder feeding mechanism, stress is reduced, deformation or cracking is avoided, and cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of additive manufacturing, more particularly to a continuous forming additive manufacturing device. BACKGROUND

[0002] Additive Manufacturing, also known as 3D printing, is an advanced manufacturing technology that adds materials layer by layer to manufacture objects. It is based on digital model files and uses a material accumulation strategy, which is in sharp contrast to traditional subtractive manufacturing (such as cutting).

[0003] Continuous forming additive manufacturing technology is based on the discrete-accumulation principle, which discretizes a three-dimensional model into a series of two-dimensional layers, and then realizes solidification through layer-by-layer accumulation of materials.

[0004] In existing additive manufacturing technology, aluminum alloy and titanium alloy materials have complex temperature changes and unpredictable molten pool conditions during the manufacturing process, resulting in residual stress concentration in the internal or local area, leading to deformation or cracking. The existing reduction method is inefficient, high in cost and cannot be synchronized with stress homogenization during the additive process.

[0005] Therefore, how to provide a continuous forming additive manufacturing device that reduces stress and avoids deformation or cracking, and reduces cost is a problem that needs to be solved by those skilled in the art. SUMMARY

[0006] Therefore, the present application provides a continuous forming additive manufacturing device, which aims to solve one of the problems in the background art, to reduce stress and avoid deformation or cracking, and to reduce cost.

[0007] In order to achieve the above purpose, the present application adopts the following technical solutions: A continuous forming additive manufacturing device, comprising: a frame; a three-axis motion platform, the three-axis motion platform is arranged in the frame, and a substrate heating mechanism is arranged on the three-axis motion platform, and the position of the substrate heating mechanism is adjusted by the three-axis motion platform; The powder feeding mechanism comprises a horizontally arranged horizontal multi-gradient powder laying box, a vertically arranged powder collecting cylinder and a powder storage tank. A plurality of accommodating cavities are arranged in the horizontal multi-gradient powder laying box. Each accommodating cavity is provided with a movable baffle corresponding to the side wall of the horizontal multi-gradient powder laying box. The horizontal multi-gradient powder laying box is provided with a powder inlet corresponding to each box on the side wall. A horizontal pushing powder mixer is arranged in each accommodating cavity. The horizontal pushing powder mixer faces the movable baffle. The powder collecting cylinder is located below the movable baffle. The powder is pushed into the powder collecting cylinder by the horizontal pushing powder mixer. The powder collecting cylinder is in communication with the powder storage tank through a pipeline. A valve is arranged on the pipeline communicating the powder collecting cylinder and the powder storage tank. A low-power induction preheating mechanism and a high-power induction heating mechanism are arranged below the powder storage tank in the vertical direction. The low-power induction preheating mechanism and the high-power induction heating mechanism are in communication with the powder storage tank through a pipeline in sequence. The high-power induction heating mechanism faces the substrate heating mechanism. A multi-axis robot is arranged on a control console. The control console is arranged in the frame. The multi-axis robot clamps the powder storage tank. A liquid tin circulating mechanism is arranged in the frame. The liquid tin circulating mechanism rapidly absorbs and disperses heat for the low-power induction preheating mechanism.

[0008] Further, the three-axis motion platform comprises a lifting cylinder, a rotating seat, a bottom plate and a moving seat. The rotating seat is located at the top of the lifting cylinder. The bottom plate is arranged on the top of the rotating seat. The bottom plate is provided with a sliding rail and a lead screw. The moving seat is provided with a sliding block and a lead screw plate at the bottom. The moving seat is slidably arranged on the sliding rail of the bottom plate through the sliding block. The lead screw is arranged on the lead screw plate. The moving seat is provided with a substrate heating mechanism.

[0009] Further, the three-axis motion platform comprises a lifting cylinder, a rotating seat, a bottom plate and a moving seat. The rotating seat is located at the top of the lifting cylinder. The bottom plate is arranged on the top of the rotating seat. The bottom plate is provided with a sliding rail and a lead screw. The moving seat is provided with a sliding block and a lead screw plate at the bottom. The moving seat is slidably arranged on the sliding rail of the bottom plate through the sliding block. The lead screw is arranged on the lead screw plate. The moving seat is provided with a substrate heating mechanism.

[0010] Further, the substrate heating mechanism comprises a heating plate and a substrate body. The heating plate is arranged on the moving seat. The substrate body is arranged on the heating plate. The substrate body is provided with a to-be-added part.

[0011] Further, the liquid tin circulating mechanism comprises an inner tin pot, an outer tin pot and a circulating pump assembly, the inner tin pot and the outer tin pot are communicated through a circulating channel, the circulating channel is spirally arranged on the outer wall of the low-power induction preheating mechanism, and the circulating pump assembly is arranged in the inner tin pot and the outer tin pot.

[0012] Further, an integrated infrared temperature measuring instrument is further arranged in the frame, and the integrated infrared temperature measuring instrument faces the substrate body.

[0013] Further, a camera mechanism is arranged on the substrate body, and the camera mechanism is arranged on two sides of the substrate body.

[0014] According to the above technical scheme, compared with the prior art, the application provides a continuous forming additive manufacturing device, the substrate body can be adjusted in three directions by arranging a three-axis motion platform, the position of the powder storage tank is controlled by cooperating with the multi-axis mechanical hand, the problems of excessive powder extrusion and insufficient powder extrusion are avoided by dynamic adjustment, different powder storage spaces are separated by arranging a horizontal multi-gradient powder laying box, different kinds of powder are accurately mixed by cooperating with a horizontal rolling powder mixer, a powder layer with continuous chemical composition change is formed, the uniform delivery and continuous powder supply of the powder are realized by arranging a powder collecting cylinder and a powder storage tank, and the low-power induction preheating mechanism is adjusted in temperature to quickly absorb and disperse heat by arranging a liquid tin circulating mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only constitute the embodiments of the application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of the provided drawings.

[0016] Figure 1 The structural schematic diagram of the continuous forming additive manufacturing device provided by the application is shown in the figure. Figure 2 The structural schematic diagram (another view) of the continuous forming additive manufacturing device provided by the application is shown in the figure. Figure 3 The structural schematic front view of the continuous forming additive manufacturing device provided by the application is shown in the figure. Figure 4 The internal structural schematic diagram of the powder feeding mechanism provided by the application is shown in the figure. Figure 5 The structural schematic diagram of the three-axis motion platform and the camera mechanism provided by the application is shown in the figure.

[0017] Wherein: 1 is the frame; 2 is the three-axis motion platform; 21 is the lifting cylinder; 22 is the rotating seat; 23 is the bottom plate; 24 is the moving seat; 25 is the slide rail; 26 is the lead screw; 27 is the sliding block; 28 is the lead screw plate; 29 is the motor; 3 is the powder feeding mechanism; 31 is the horizontal multi-gradient powder laying box; 32 is the powder collecting cylinder; 33 is the powder storage tank; 34 is the containing cavity; 35 is the movable baffle; 36 is the horizontal pushing powder mixer; 4 is the low-power induction preheating mechanism; 5 is the high-power induction heating mechanism; 6 is the multi-axis mechanical hand; 7 is the control console; 8 is the liquid tin circulating mechanism; 81 is the inner tin pot; 82 is the outer tin pot; 83 is the circulating channel; 9 is the substrate body; 10 is the heating plate; 11 is the recovery cylinder; 12 is the valve; 13 is the camera mechanism. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0019] Reference Figures 1-5 The embodiments of the present application disclose a continuous forming additive manufacturing device, comprising: a frame 1; a three-axis motion platform 2, the three-axis motion platform 2 is arranged in the frame 1, and a substrate heating mechanism is arranged on the three-axis motion platform 2, and the position of the substrate heating mechanism is adjusted by the three-axis motion platform 2; The powder feeding mechanism 3 comprises a horizontal multi-gradient powder laying box 31 arranged transversely, a powder collecting cylinder 32 arranged vertically, and a powder storage tank 33. The horizontal multi-gradient powder laying box 31 is provided with a plurality of containing cavities 34. Each containing cavity 34 is provided with a movable baffle 35 corresponding to the side wall of the horizontal multi-gradient powder laying box 31. The horizontal multi-gradient powder laying box 31 is provided with a powder inlet corresponding to each horizontal multi-gradient powder laying box 31 on the side wall. Each containing cavity 34 is provided with a horizontal pushing powder mixer 36, which faces the movable baffle 35. The powder collecting cylinder 32 is located below the movable baffle 35. The powder is pushed into the powder collecting cylinder 32 by the horizontal pushing powder mixer 36. The powder collecting cylinder 32 and the powder storage tank 33 are connected by a pipeline. A valve 12 is arranged on the pipeline connecting the powder collecting cylinder 32 and the powder storage tank 33. Different powder storage spaces are separated by the horizontal multi-gradient powder laying box 31. The horizontal rolling powder mixer is used to realize accurate proportional mixing of different types of powder, and a powder layer with continuous chemical composition change is formed. The powder collecting cylinder 32 and the powder storage tank 33 are arranged to realize uniform powder delivery and continuous powder supply by cooperating with the pipeline and the valve 12. The powder layer thickness is reasonably set. The movable baffle 35 is opened and closed by a rotating motor. The movable baffle 35 is first opened by the rotating motor, then powder is fed into each containing cavity 34 through the powder inlet, and then the powder is pushed into the powder collecting cylinder 32 by the horizontal pushing powder mixer 36. The low-power induction preheating mechanism 4 and the high-power induction heating mechanism 5 are arranged below the powder storage tank 33 in the vertical direction. The low-power induction preheating mechanism 4 and the high-power induction heating mechanism 5 are connected to the powder storage tank 33 in sequence by a pipeline. The high-power induction heating mechanism 5 faces the substrate heating mechanism. The powder is preheated by the low-power induction preheating mechanism 4, and then continuously formed on the substrate body 9 by the high-power induction heating mechanism 5. The multi-axis robot 6 is arranged on the control console 7, which is arranged in the frame 1. The multi-axis robot 6 clamps the powder storage tank 33. The position of the powder storage tank 33 is controlled by the multi-axis robot 6 to dynamically adjust the position to avoid powder over-extrusion and under-extrusion problems. A laser tracker is arranged to correct the position error in real time. The liquid tin circulation mechanism 8 is arranged in the frame 1. The low-power induction preheating mechanism 4 is quickly absorbed and dispersed by the liquid tin circulation mechanism 8.

[0020] In the embodiment, the three-axis motion platform 2 comprises a lifting cylinder 21, a rotating seat 22, a bottom plate 23, and a moving seat 24. The rotating seat 22 is located on the top of the lifting cylinder 21, the bottom plate 23 is arranged on the top of the rotating seat 22, the bottom plate 23 is provided with a sliding rail 25 and a lead screw 26, the moving seat 24 is provided with a sliding block 27 and a lead screw plate 28 at the bottom, the moving seat 24 is slidably arranged on the sliding rail 25 of the bottom plate 23 through the sliding block 27, the lead screw 26 is arranged on the lead screw plate 28, and the moving seat 24 is provided with a substrate heating mechanism. The moving seat 24 is adjusted in the vertical direction by the lifting cylinder 21, the moving seat 24 is adjusted in the horizontal direction by the rotating seat 22, the moving seat 24 is moved relative to the bottom plate 23 by driving the lead screw 26 to rotate by the motor 29, and the substrate body 9 can be adjusted in three directions by arranging the three-axis motion platform 2.

[0021] In the embodiment, the un-melted powder recycling mechanism is arranged in the frame 1 away from the multi-axis manipulator 6, the un-melted powder recycling mechanism comprises a recycling cylinder 11 and a fan, the recycling cylinder 11 is located below the powder feeding mechanism 3, the recycling cylinder 11 is in communication with the powder collecting cylinder 32 through a pipeline, a valve 12 is arranged on the pipeline in communication with the powder feeding channel of the recycling cylinder 11, a powder screen is arranged in the recycling cylinder 11, and the recycling cylinder 11 is sealed and filled with inert gas.

[0022] In the embodiment, the substrate heating mechanism comprises a heating plate 10 and a substrate body 9, the heating plate 10 is arranged on the moving seat 24, and the substrate body 9 is arranged on the heating plate 10. The substrate body 9 is heated by the heating plate 10 to adjust the temperature, reduce stress, and avoid deformation or cracking.

[0023] In the embodiment, the liquid tin circulating mechanism 8 comprises an inner tin pot 81, an outer tin pot 82, and a circulating pump assembly. The inner tin pot 81 and the outer tin pot 82 are in communication through a circulating channel 83, the circulating channel 83 is spirally arranged on the outer wall of the low-power induction preheating mechanism 4, and the circulating pump assembly is arranged inside the inner tin pot 81 and the outer tin pot 82.

[0024] In the embodiment, the integrated infrared temperature measuring instrument is arranged in the frame 1, the integrated infrared temperature measuring instrument faces the substrate body 9, and the temperature distribution is monitored in real time by the integrated infrared temperature measuring instrument.

[0025] In the embodiment, the substrate body 9 is provided with the camera mechanism 13, the camera mechanism 13 is oppositely arranged on both sides of the substrate body 9, and the two camera mechanisms 13 are both towards the substrate body 9. The camera mechanism 13 is arranged to observe the continuous forming additive manufacturing process on the substrate body 9 in real time.

[0026] In addition, in the embodiment, a sandwich piezoelectric ceramic transducer is further included, and the sandwich piezoelectric ceramic transducer is arranged in a ring array on the moving seat 24 to synchronously detect internal defects of the additive part to be manufactured.

[0027] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between the various embodiments can be referred to each other. For the device disclosed by the embodiments, since it corresponds to the method disclosed by the embodiments, the description is relatively simple, and the related parts can be referred to the method part.

[0028] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to the embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A continuous forming additive manufacturing apparatus, characterized by, The utility model relates to a kind of additive manufacturing equipment, including: Frame; Three-axis motion platform, the three-axis motion platform is set in the frame, base plate heating mechanism is equipped on the three-axis motion platform, the position of the base plate heating mechanism is adjusted by the three-axis motion platform; Powder feeding mechanism, the powder feeding mechanism includes horizontally arranged horizontal multi-gradient powder laying box, vertically arranged powder collecting cylinder and powder storage tank, a plurality of containing cavities are arranged in the horizontal multi-gradient powder laying box, each containing cavity is equipped with movable baffle corresponding to the side wall of the horizontal multi-gradient powder laying box, the horizontal multi-gradient powder laying box is equipped with powder inlet corresponding to each box in side wall, horizontal push powder mixer is arranged in each containing cavity, the horizontal push powder mixer is towards movable baffle, the powder collecting cylinder is below movable baffle, powder is pushed into powder collecting cylinder by the horizontal push powder mixer, the powder collecting cylinder is communicated with the powder storage tank by pipeline, valve is arranged on the pipeline that the powder collecting cylinder is communicated with the powder storage tank; Low-power induction preheating mechanism and high-power induction heating mechanism, the low-power induction preheating mechanism and high-power induction heating mechanism are arranged in the lower of the powder storage tank along vertical direction, the low-power induction preheating mechanism and high-power induction heating mechanism are sequentially communicated with the powder storage tank by pipeline, the high-power induction heating mechanism is towards the base plate heating mechanism; Multi-axis manipulator, the multi-axis manipulator is arranged on control console, the control console is arranged in the frame, and the multi-axis manipulator clamps the powder storage tank; Liquid tin circulation mechanism, the liquid tin circulation mechanism is arranged in the frame, and the low-power induction preheating mechanism is quickly absorbed and dispersed heat by the liquid tin circulation mechanism.

2. A continuous forming additive manufacturing device according to claim 1, wherein, The three-axis motion platform includes lifting cylinder, rotating seat, bottom plate and moving seat, the rotating seat is located at the top of the lifting cylinder, the bottom plate is arranged on the top of the rotating seat, the bottom plate is equipped with slide rail and lead screw, the bottom of the moving seat is equipped with sliding block and screw plate, the moving seat is slidably arranged on the slide rail of the bottom plate through the sliding block, the lead screw is arranged on the screw plate, and the moving seat is equipped with base plate heating mechanism.

3. A continuous forming additive manufacturing device according to claim 1, wherein, It also includes unmelted powder recovery mechanism, the unmelted powder recovery mechanism is arranged in the frame away from the side of the multi-axis manipulator, the unmelted powder recovery mechanism includes recovery cylinder and fan, the recovery cylinder is below the powder feeding mechanism, the recovery cylinder is communicated with the powder collecting cylinder by pipeline, valve is arranged on the pipeline that the recovery cylinder is communicated with the powder feeding channel, powder screen is arranged in the recovery cylinder, and the recovery cylinder is sealed and filled with inert gas.

4. A continuous forming additive manufacturing apparatus according to claim 2, wherein, The base plate heating mechanism includes heating plate and base plate body, the heating plate is arranged on the moving seat, the base plate body is arranged on the heating plate, and the base plate body is equipped with to be added piece.

5. A continuous forming additive manufacturing device according to claim 1, wherein, The liquid tin circulation mechanism includes inner tin pot, outer tin pot and circulating pump assembly, the inner tin pot and the outer tin pot are communicated by circulating channel, the circulating channel is spirally arranged on the outer wall of the low-power induction preheating mechanism, and the circulating pump assembly is arranged inside the inner tin pot and outer tin pot.

6. A continuous forming additive manufacturing device according to claim 1, wherein, Also included is an integrated infrared thermometer disposed within the frame, the integrated infrared thermometer facing the substrate body.

7. A continuous forming additive manufacturing apparatus according to claim 4, wherein, The substrate body is provided with a camera mechanism, and the camera mechanism is oppositely arranged on both sides of the substrate body, and both the camera mechanisms face the substrate body.

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