Auxiliary device for electric arc fuse wire additive manufacturing

Abstract

The utility model discloses an auxiliary device for arc fuse additive manufacturing, which comprises a workbench and an induction coil, the induction coil is arranged on the workbench through a displacement driving mechanism, and the displacement driving mechanism is used for driving the induction coil to be close to or far away from the workbench. According to the auxiliary device for electric arc fuse additive manufacturing, due to the arrangement of the electromagnetic coil, molten metal can be made to fluctuate through an electromagnetic field so that the molten metal can be stirred, the purpose of structure refining is achieved, and anisotropy of microstructures and mechanical properties in the wire feeding direction and the stacking direction is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of metal fuse printing, in particular to an auxiliary device for arc fuse additive manufacturing. Background Art

[0002] Titanium alloys have been widely used in aerospace, medical, shipbuilding and other fields due to their excellent comprehensive properties such as light weight, high specific strength and corrosion resistance. These properties have also correspondingly increased the difficulty of titanium alloy processing, making it difficult to prepare large and complex structural parts. With the rise of fuse printing technology, it has shown great advantages in titanium alloy processing, improving the forming efficiency and material utilization of large titanium alloy parts. The arc fuse additive manufacturing technology has low equipment price and simple operation. It has better forming efficiency and forming ability than laser fuse additive manufacturing and electron beam fuse additive manufacturing technologies. Therefore, it has been widely used in the field of titanium alloy fuse additive manufacturing.

[0003] However, titanium alloy parts manufactured by arc fuse additive manufacturing all have coarse epitaxially grown β columnar crystals, which leads to anisotropy of the microstructure and mechanical properties in the wire feeding direction and the stacking direction.

[0004] Based on this, the utility model proposes an auxiliary device for arc fuse additive manufacturing to solve the above-mentioned problems. Utility Model Content

[0005] The utility model aims to provide an auxiliary device for arc fuse additive manufacturing, which reduces the anisotropy of microstructure and mechanical properties in the wire feeding direction and the stacking direction.

[0006] In order to solve the above technical problems, the utility model provides an auxiliary device for arc fuse additive manufacturing, including a workbench and an induction coil, wherein the induction coil is installed on the workbench through a displacement drive mechanism, and the displacement drive mechanism is used to drive the induction coil to approach or move away from the workbench.

[0007] Furthermore, the displacement driving mechanism includes a driving rail, a driving screw and a driving motor, one end of the driving rail is fixed on the workbench, and a driving block is slidably installed on the driving rail, the driving block is connected to the induction coil, and the driving block is threadedly connected to the driving screw, the driving screw is rotatably installed on the workbench, and one end of the driving screw is transmission-connected to the driving motor.

[0008] Furthermore, the driving motor is electrically connected to a controller.

[0009] Furthermore, the driving motor is a servo motor.

[0010] Further, the driving block and the induction coil are detachably connected.

[0011] Further, the workbench is connected to the machine frame by bolts, and adjusting feet are installed at the bottom of the machine frame.

[0012] Further, a plurality of fixing holes matching the bolts are spaced along the height direction of the machine frame.

[0013] Further, the machine frame is a frame structure composed of multiple hollow stainless steel pipes.

[0014] Compared with the prior art, the utility model has at least the following beneficial effects:

[0015] An auxiliary device for arc wire - feeding additive manufacturing provided by the utility model can make the metal liquid fluctuate by using an electromagnetic field through the arrangement of an electromagnetic coil, so as to stir the metal liquid, thereby achieving the purpose of refining the structure and reducing the anisotropy of the microstructure and mechanical properties in the wire - feeding direction and the stacking direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of the auxiliary device for arc wire - feeding additive manufacturing of the utility model;

[0017] Figure 2 is a schematic diagram of the working state of the auxiliary device for arc wire - feeding additive manufacturing of the utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The auxiliary device for arc wire - feeding additive manufacturing of the utility model will be described in more detail below with reference to the schematic diagrams, in which the preferred embodiments of the utility model are shown. It should be understood that those skilled in the art can modify the utility model described herein while still achieving the beneficial effects of the utility model. Therefore, the following description should be understood as a broad guidance for those skilled in the art and not as a limitation to the utility model.

[0019] In the following paragraphs, the utility model will be described more specifically by way of example with reference to the drawings. According to the following description, the advantages and features of the utility model will be clearer. It should be noted that the drawings are all in a very simplified form and use non - precise scales, only for the purpose of conveniently and clearly assisting in explaining the embodiments of the utility model.

[0020] As Figure 1 shown, an embodiment of the utility model provides an auxiliary device for arc wire - feeding additive manufacturing, including a workbench 1 and an induction coil 2. The induction coil 2 is installed on the workbench 1 through a displacement driving mechanism 3, and the displacement driving mechanism 3 is used to drive the induction coil 2 to approach or move away from the workbench 1.

[0021] With reference toFigure 2 The workpiece is placed on the workbench 1 through the substrate 4. The wire feeder 5 and the docking electrode 6 are used to perform fused filament additive manufacturing on the workpiece placed on the workbench. During the fused filament additive manufacturing process, the induction coil 2 is energized. The height where the induction coil 2 is located is the same as the additive height. An alternating magnetic field will be generated around the induction coil 2, causing an alternating current opposite to the current in the induction coil 2 to be generated in the molten metal of the additive. As a result, the molten metal will fluctuate, thus achieving the effect of electromagnetic stirring. When the molten metal is stirred, the β columnar crystals generated along the stacking direction of the additive can be effectively broken, that is, the purpose of refining the microstructure is achieved, and the anisotropy of the mechanical properties in the wire feeding direction and the stacking direction is reduced.

[0022] During the fused filament additive manufacturing, the additive on the workpiece will gradually accumulate, and the working area will be correspondingly raised. The displacement driving mechanism 3 is used to adjust the distance between the induction coil 2 and the workbench 1, so that the induction coil is always at an appropriate height to ensure a good stirring effect on the molten metal throughout the process.

[0023] In a specific embodiment, the displacement driving mechanism 3 includes a driving slide rail 31, a driving lead screw 32 and a driving motor 33. One end of the driving slide rail 31 is fixed on the workbench 1, and a driving block 34 is slidably installed on the driving slide rail 31. The driving block 34 is connected to the induction coil 2, and the driving block 34 is threadedly connected through the driving lead screw 32. The driving lead screw 32 is rotatably installed on the workbench 1, and one end of the driving lead screw 32 is drivingly connected to the driving motor 33.

[0024] Specifically, the driving motor 33 is electrically connected to the controller and fixed on the workbench. The controller stores a preset program. During the fused filament additive manufacturing, the controller controls the driving motor 33 to start according to the preset program. When the driving motor 33 starts, it will drive the driving lead screw 32 to rotate, thereby driving the induction coil 2 connected to the driving block 34 to slide along the driving slide rail 31, and then realizing the adjustment of the distance between the induction coil 2 and the workbench 1 to meet the stirring requirements for the molten metal.

[0025] Furthermore, preferably, the driving motor 33 is a servo motor. The servo motor can control the speed and has very accurate position accuracy. It can convert the voltage signal into torque and speed to drive the controlled object. The rotation speed of the rotor of the servo motor is controlled by the input signal and can respond quickly. In an automatic control system, it is used as an actuator and has characteristics such as a small electromechanical time constant and high linearity. It can convert the received electrical signal into the angular displacement or angular velocity output on the motor shaft. It is divided into two categories: DC and AC servo motors. Its main feature is that there is no self-rotation phenomenon when the signal voltage is zero, and the rotation speed decreases uniformly with the increase of the torque. The driving motor 33 adopts a servo motor to achieve precise programmed control during the adjustment of the position of the induction coil 2.

[0026] Further, the driving block 34 is detachably connected to the induction coil 2, which enables the replacement of the induction coil with a suitable size according to workpieces of different specifications, improving the applicability of the device.

[0027] In a specific embodiment, the workbench 1 is connected to the machine frame 7 by bolts. The machine frame 7 is a frame structure composed of multiple hollow stainless steel pipes, and adjusting feet 8 are installed at the bottom of the machine frame 7. The machine frame 7 is constructed with hollow stainless steel pipes as the material, ensuring the portability of the device while also ensuring its durability. With the setting of the adjusting feet 8, the stable placement of the device is ensured.

[0028] Further, a plurality of fixing holes 71 matching the bolts are spaced along the height direction of the machine frame 7. By making the workbench 1 cooperate with different fixing holes 71 and fastening with bolts, the adjustment of the installation height of the workbench 1 is achieved, improving the applicability of the device.

[0029] In summary, an auxiliary device for arc wire - feeding additive manufacturing provided by the present utility model, through the setting of the electromagnetic coil, can use the electromagnetic field to cause fluctuations in the molten metal to stir the molten metal, thereby achieving the purpose of refining the microstructure and reducing the anisotropy of the microstructure and mechanical properties in the wire - feeding direction and the stacking direction.

[0030] Obviously, those skilled in the art can make various changes and modifications to the present utility model without departing from the spirit and scope of the present utility model. Thus, if these modifications and variations of the present utility model fall within the scope of the claims of the present utility model and their equivalent technologies, the present utility model also intends to include these changes and modifications.

Claims

1. An auxiliary device for arc wire additive manufacturing, characterized in that, It includes a workbench and an induction coil; The induction coil is installed on the workbench through a displacement driving mechanism; The displacement driving mechanism is used to drive the induction coil to approach or move away from the workbench.

2. The auxiliary device for arc wire additive manufacturing according to claim 1, characterized in that, The displacement driving mechanism includes a driving slide rail, a driving lead screw and a driving motor; One end of the driving slide rail is fixed on the workbench, and a driving block is slidably installed on the driving slide rail; The driving block is connected to the induction coil, and the driving block is threadedly connected through the driving lead screw; The driving lead screw is rotatably installed on the workbench, and one end of the driving lead screw is drivingly connected to the driving motor.

3. The auxiliary device for arc wire additive manufacturing according to claim 2, wherein, The driving motor is electrically connected to a controller.

4. The auxiliary device for arc wire additive manufacturing according to claim 2 or 3, characterized in that, The driving motor is a servo motor.

5. The auxiliary device for arc wire additive manufacturing according to claim 2, characterized in that, The connection between the driving block and the induction coil is detachable.

6. The auxiliary device for arc wire additive manufacturing according to claim 1, wherein, The workbench is connected to a frame through bolts, and adjusting feet are installed at the bottom of the frame.

7. The auxiliary device for arc wire additive manufacturing according to claim 6, characterized in that, A plurality of fixing holes matching the bolts are spaced apart along the height direction of the frame.

8. The auxiliary device for arc wire additive manufacturing according to claim 6, characterized in that, The frame is a frame structure composed of multiple hollow stainless steel pipes.

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