Metal additive manufacturing powder bed preheating device

Abstract

The utility model discloses a metal additive manufacturing powder bed preheating device which comprises a bottom plate and limiting strips installed on the left side and the right side of the outer wall of the upper end of the bottom plate, a heat conduction plate is arranged between the inner wall of the upper end of the bottom plate and the inner walls of the limiting strips, and the outer wall of the lower end and the outer walls of the left end and the right end of the heat conduction plate are fixedly connected with a plurality of resistors. One end of each resistor is provided with a power line so as to provide power for the resistor and enable the resistor to heat, a heating pipe is fixedly connected to the outer wall of the lower end of the heat conduction plate, and a plurality of guiding pipes are fixedly connected to the outer wall of the lower end of the heating pipe so as to guide circulation of a medium. Hot water or hot air can be input into the heating pipe of the guide pipe network, the temperature of the powder bed can be maintained, the powder is prevented from being solidified too fast, and it is guaranteed that the part manufacturing process can continue until more appropriate countermeasures are taken.

Description

Technical Field

[0001] This utility model belongs to the technical field of powder bed heating, specifically relating to a preheating device for metal additive manufacturing powder beds. Background Technology

[0002] The powder bed preheating device for metal additive manufacturing is a crucial equipment component in the metal additive manufacturing process. It is designed to preheat the metal powder bed used for additive manufacturing, creating favorable conditions for the manufacture of high-quality metal parts.

[0003] However, in the event of a power outage, some powder may not be fully heated, which will interrupt the heating process and reduce production efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a metal additive manufacturing powder bed preheating device to solve the problem mentioned in the background art that some powder is not fully heated when a power outage occurs.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a metal additive manufacturing powder bed preheating device, comprising a base plate and limiting strips installed on the left and right sides of the upper outer wall of the base plate;

[0006] A heat-conducting plate is provided between the upper inner wall of the base plate and the inner wall of the limiting strip;

[0007] Multiple resistors are fixedly connected to the lower outer wall and the left and right outer walls of the heat-conducting plate.

[0008] Each of the resistors has a power line at one end to provide power to the resistor and cause it to heat up.

[0009] A heating tube is fixedly connected to the lower outer wall of the heat-conducting plate, and multiple guide tubes are fixedly connected to the lower outer wall of the heating tube to guide the flow of the medium.

[0010] Preferably, a heat-conducting pipe is fixedly connected between the lower outer walls of the plurality of guide tubes to guide excess heat into the interior.

[0011] Preferably, the heat pipe has an inlet at its first end to guide the medium into the interior of the heat pipe, and an outlet at its last end to guide the medium out.

[0012] Preferably, each of the multiple guide tubes has an adjustment knob on its right circular outer wall, and each of the multiple guide tubes has a valve core inside.

[0013] Preferably, a controller is fixedly connected to the front outer wall of the base plate.

[0014] Preferably, the front outer wall of the base plate has a through opening for the power cord to pass through, and the base plate is provided with multiple hubs to guide the direction and position of multiple lines.

[0015] Preferably, a fixing rod is fixedly connected to the lower outer wall of each of the resistors to limit the position of the resistors and power lines.

[0016] Preferably, one end of the base plate and the limiting strip is fixedly connected to an insulation layer, and one side of each of the multiple insulation layers is provided with a heat insulation shell.

[0017] Compared with the prior art, this utility model provides a metal additive manufacturing powder bed preheating device, which has the following beneficial effects:

[0018] 1. By installing guide pipes and heating pipes, hot water or hot air can be introduced into the heating pipes through the guide pipe network in the event of a power outage. This can maintain the temperature of the powder bed, prevent the powder from solidifying too quickly, and ensure that the manufacturing process of the parts can continue until a more appropriate countermeasure is taken. At the same time, the hot fluid can transfer heat to the lower temperature area or absorb excess heat from the higher temperature area, thus playing a role in assisting in regulating the temperature uniformity of the powder bed.

[0019] 2. By installing heat pipes, when the powder bed is heated normally by the preheating device, the heat inside the bottom plate can be guided outward through the guide pipes and transferred to the gas or liquid flowing inside the heat pipes. This realizes the recovery and utilization of the waste heat of the bottom plate, provides heat energy for other auxiliary systems of the equipment, thereby reducing additional energy consumption and improving the energy utilization efficiency of the entire preheating device and even the additive manufacturing system. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a metal additive manufacturing powder bed preheating device according to the present invention.

[0021] Figure 2 This is a partial structural schematic diagram of the side cross-section of the base plate area of ​​this utility model.

[0022] Figure 3 This is a partial structural schematic diagram of the front cross-section of the base plate area of ​​this utility model.

[0023] Figure 4 This is a partial structural schematic diagram of the guide tube area in frontal cross-section of this utility model.

[0024] In the diagram: 1. Base plate; 2. Limiting strip; 3. Controller; 4. Inlet; 5. Hub; 6. Heat-conducting plate; 7. Resistor; 8. Fixing rod; 9. Power cord; 10. Guide tube; 11. Heat-conducting tube; 12. Heating tube; 13. Insulation layer; 14. Insulation shell; 15. Valve core; 16. Inlet; 17. Adjustment knob. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] This utility model provides, for example Figure 1-4 The metal additive manufacturing powder bed preheating device shown includes a base plate 1 and limiting strips 2 installed on the left and right sides of the upper outer wall of the base plate 1.

[0027] A heat-conducting plate 6 is provided between the upper inner wall of the base plate 1 and the inner wall of the limiting strip 2;

[0028] Multiple resistors 7 are fixedly connected to the lower outer wall and the left and right outer walls of the heat-conducting plate 6;

[0029] One end of each of the multiple resistors 7 is provided with a power line 9 to provide power to the resistors 7, causing the resistors 7 to heat up. When the power switch is turned on, the current flows to the resistors 7 through the power line 9, the resistors 7 begin to heat up, and transfer the heat to the heat-conducting plate 6. As time goes by, the temperature of the heat-conducting plate 6 gradually increases, and the heat is transferred to the powder bed above through heat conduction, thus beginning the preheating of the powder bed.

[0030] A heating tube 12 is fixedly connected to the lower outer wall of the heat-conducting plate 6. Multiple guide tubes 10 are fixedly connected to the lower outer wall of the heating tube 12 to guide the flow of the medium. In the event of a power failure, the valves related to the guide tubes 10 are opened, allowing hot water or hot air to flow into the heating tubes 12 through the guide tubes 10. The medium flows in the heating tubes 12 and exchanges heat with the heat-conducting plate 6, continuously providing heat to the heat-conducting plate 6, thereby maintaining the temperature of the powder bed.

[0031] like Figure 3 and Figure 4 As shown, a heat-conducting pipe 11 is fixedly connected between the lower outer walls of multiple guiding pipes 10 to guide excess heat into the interior. The first end of the heat-conducting pipe 11 is provided with an inlet 16 to guide the medium into the interior of the heat-conducting pipe 11, and the end of the heat-conducting pipe 11 is provided with an outlet to guide the medium out.

[0032] During the preheating process, as the resistor 7 heats up, the temperature of the heat-conducting plate 6 rises. Excess heat begins to be transferred through the heating tube 12 to the guide tube 10. The medium enters the heat-conducting tube 11 through the inlet 16, absorbs heat, and is discharged from the outlet, thus realizing heat recovery.

[0033] like Figure 4 As shown, each of the multiple guide tubes 10 has an adjustment knob 17 on its right circular outer wall, and each of the multiple guide tubes 10 has a valve core 15 inside.

[0034] By adjusting the adjusting knob 17 on the guide pipe 10, the valve core 15 is rotated, thereby controlling the flow rate of the medium in the guide pipe 10.

[0035] like Figure 1 and Figure 2 As shown, a controller 3 is fixedly connected to the front outer wall of the base plate 1. A through-hole 4 is opened inside the front outer wall of the base plate 1 to allow the power cord 9 to pass through. Multiple hubs 5 are installed inside the base plate 1 to guide the direction and position of multiple lines.

[0036] The controller 3 receives data from external monitoring devices such as temperature sensors. This data reflects information such as the real-time temperature of the powder bed and the working status of the resistor 7. Based on this data, the controller 3 uses internal preset algorithms and programs to precisely control the heating power of the resistor 7. The opening 4 inside the front outer wall of the base plate 1 provides a passage for the power cord 9 to pass through, ensuring that the power cord 9 can be smoothly connected to the external power source. At the same time, the hub 5 prevents the power cord 9 from being messy inside the device, improving the safety and cleanliness of the device.

[0037] like Figure 3 As shown, a fixing rod 8 is fixedly connected to the lower outer wall of multiple resistors 7 to limit the position of resistors 7 and power lines 9. A heat insulation layer 13 is fixedly connected to one end of the base plate 1 and the limiting strip 2. A heat insulation shell 14 is provided on one side of multiple heat insulation layers 13.

[0038] The fixing rod 8 restricts the position of the resistor 7 and the power line 9. The fixing rod 8 firmly fixes the resistor 7 in a specific position to prevent the resistor 7 from shifting due to vibration, thermal expansion and contraction, etc. during the operation of the preheating device. The insulation layer 13 is made of rock wool with low thermal conductivity, which can effectively prevent heat from being transferred from the inside of the preheating device to the external environment, so that as much of the heat generated by the resistor 7 is retained inside the device. The heat insulation shell 14 can block the radiative loss of heat and prevent the influence of external environmental factors on the insulation layer 13 and internal components.

[0039] The implementation principle of this embodiment is as follows: When the power switch is turned on, the current flows through the power line 9 to the resistor 7, the resistor 7 starts to heat up and transfers the heat to the heat-conducting plate 6. As time goes by, the temperature of the heat-conducting plate 6 gradually increases, and the heat is transferred to the powder bed above through heat conduction to start preheating the powder bed. In the event of a power failure, the valves related to the guide pipe 10 are opened, allowing hot water or hot air or other media to flow into the heating pipe 12 through the guide pipe 10. The media flows in the heating pipe 12 and exchanges heat with the heat-conducting plate 6, continuously providing heat to the heat-conducting plate 6, thereby maintaining the temperature of the powder bed.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A metal additive manufacturing powder bed preheating device, comprising a base plate (1) and limiting strips (2) installed on the left and right sides of the upper outer wall of the base plate (1). A heat-conducting plate (6) is provided between the upper inner wall of the base plate (1) and the inner wall of the limiting strip (2). Multiple resistors (7) are fixedly connected to the lower outer wall and the left and right outer walls of the heat-conducting plate (6). Each of the resistors (7) has a power line (9) at one end to provide power to the resistor (7) and make the resistor (7) heat up; Its features are: A heating tube (12) is fixedly connected to the lower outer wall of the heat-conducting plate (6), and a plurality of guide tubes (10) are fixedly connected to the lower outer wall of the heating tube (12) to guide the flow of the medium.

2. The metal additive manufacturing powder bed preheating device according to claim 1, characterized in that: A heat-conducting pipe (11) is fixedly connected between the lower outer walls of the plurality of guide tubes (10) to guide excess heat into the interior.

3. The metal additive manufacturing powder bed preheating device according to claim 2, characterized in that: The heat pipe (11) has an inlet (16) at its first end to guide the medium into the interior of the heat pipe (11), and an outlet at its last end to guide the medium out.

4. The metal additive manufacturing powder bed preheating device according to claim 1, characterized in that: Each of the multiple guide tubes (10) has an adjustment knob (17) on its right circular outer wall, and each of the multiple guide tubes (10) has a valve core (15) inside.

5. The metal additive manufacturing powder bed preheating device according to claim 1, characterized in that: The controller (3) is fixedly connected to the outer wall of the front end of the base plate (1).

6. The metal additive manufacturing powder bed preheating device according to claim 1, characterized in that: The front outer wall of the base plate (1) has a through opening (4) for the power line (9) to pass through. The base plate (1) is equipped with multiple hubs (5) to guide the direction and position of multiple lines.

7. The metal additive manufacturing powder bed preheating device according to claim 1, characterized in that: Each of the resistors (7) has a fixing rod (8) fixedly connected to its lower outer wall to limit the position of the resistors (7) and the power line (9).

8. A metal additive manufacturing powder bed preheating device according to claim 1, characterized in that: One end of the base plate (1) and the limiting strip (2) is fixedly connected to a heat insulation layer (13), and one side of each of the multiple heat insulation layers (13) is provided with a heat insulation shell (14).

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