Powder heating device for additive manufacturing

Abstract

The utility model provides a powder heating device for additive manufacturing, which comprises a tank body, a stirring mechanism and a heating pipe, the tank body is provided with a heating cavity, a heat supply cavity is arranged between the heating cavity and the outer wall of the tank body, a heat conduction groove is arranged in the heat supply cavity, the stirring mechanism is used for stirring powder, and the heating pipe comprises a heating pipe and a liquid circulation assembly. The liquid circulation assembly is used for injecting liquid into the heat supply cavity or discharging the liquid out of the heat supply cavity, the heating pipe is used for heating the liquid in the heat supply cavity, the liquid flows along the heat conduction groove after entering the heat supply cavity, and the heat conduction groove guides heat in the liquid into the heating cavity. According to the powder heating device for additive manufacturing, the stirring mechanism and the heating pipe are designed, the heating pipe heats liquid and then transmits the temperature in the liquid into the heating cavity, the stable temperature is provided, meanwhile, the stirring mechanism can stir powder in the heating cavity, and the powder can be evenly heated.

Description

Technical Field

[0001] The present application relates to the technical field of additive manufacturing, and in particular to a powder heating device for additive manufacturing. Background Art

[0002] The powder heating device for additive manufacturing is a device for heating powder. It is used to preheat the powder before the powder enters the additive manufacturing device so that the powder has a certain temperature before being placed in the additive manufacturing device, thereby accelerating the melting process of the powder.

[0003] Some existing powder heating devices for additive manufacturing preheat the powder by heating with electric heating tubes. This heating method is full of instability because the temperature of the electric heating tubes can reach several hundred degrees. It is easy for the metal to melt prematurely during the heating process due to excessive temperature, producing metal particles of different sizes, thus affecting the subsequent melting process.

[0004] Therefore, it is necessary to propose a powder heating device for additive manufacturing that can stably heat to solve the problem of uneven powder heating in some powder heating devices for additive manufacturing. Utility Model Content

[0005] In view of this, it is necessary to provide a powder heating device for additive manufacturing to solve the above problems.

[0006] An embodiment of the present application provides a powder heating device for additive manufacturing, comprising:

[0007] A tank body, wherein the tank body has a heating cavity, a heat supply cavity is arranged between the heating cavity and the outer wall of the tank body, a heat conduction groove is arranged in the heat supply cavity, and the heat conduction groove is arranged around the side wall of the heat supply cavity;

[0008] A stirring mechanism, wherein the stirring mechanism is disposed on the tank body, one end of the stirring mechanism extends into the heating chamber, and the stirring mechanism is used to stir the powder;

[0009] A heating pipe, the heating pipe is arranged in the heating cavity and is used to heat the liquid in the heating cavity;

[0010] A liquid circulation component, the liquid circulation component is connected to the heating cavity and is used to inject or discharge liquid into the heating cavity;

[0011] After the liquid enters the heating cavity, it flows along the heat-conducting groove, and the heat-conducting groove introduces the heat in the liquid into the heating cavity.

[0012] In at least one embodiment of the present application, the stirring mechanism includes a motor, a transmission assembly and a stirring head, one end of the transmission assembly is synchronously connected to the output end of the motor, and the other end of the transmission assembly is fixedly connected to the stirring head, and the stirring head is used to stir powder.

[0013] In at least one embodiment of the present application, a protective cover is provided on a side of the transmission assembly away from the tank body, and the protective cover is used to protect a synchronous belt between the transmission assembly and the motor.

[0014] In at least one embodiment of the present application, the protective cover is provided with holes, and the holes are used for heat dissipation.

[0015] In at least one embodiment of the present application, a discharge port is provided in the heating chamber, a discharge cavity is provided in the discharge port, one end of the discharge cavity is connected to the heating chamber, and the other end is connected to the outside, and the discharge cavity is used to discharge the powder in the heating chamber;

[0016] A blocking rod is provided in the discharge cavity, one end of the blocking rod is located in the heating cavity and abuts against the discharge port, and the blocking rod is used to block powder from entering the discharge cavity.

[0017] In at least one embodiment of the present application, a lifting assembly is provided on a side of the discharge port away from the stirring mechanism, the blocking rod extends into the lifting assembly, and the lifting assembly is used to control the movement of the blocking rod;

[0018] When the blocking rod moves in a direction away from the discharge port, the powder flows into the discharge cavity from the gap between the blocking rod and the discharge port;

[0019] When the blocking rod moves toward the direction close to the discharge port, the blocking rod finally abuts against the discharge port to block the powder from entering the discharge cavity.

[0020] In at least one embodiment of the present application, the tank body further comprises a tank cover, wherein the tank cover is disposed on the heating chamber, the stirring mechanism is disposed on the tank cover, and a hydraulic rod is disposed between the tank cover and the tank body, wherein the hydraulic rod is used to control the movement of the tank cover.

[0021] In at least one embodiment of the present application, the liquid circulation component includes a water pump and a liquid pipe, the liquid pipe is connected to the heating chamber, and the water pump is arranged on the liquid pipe to control the liquid pipe to extract liquid or inject liquid.

[0022] In at least one embodiment of the present application, a feed port is provided on the can cover for injecting external powder.

[0023] In at least one embodiment of the present application, a bracket is further included, and the tank body is arranged on the bracket.

[0024] The powder heating device for additive manufacturing provided above is designed with a stirring mechanism and a heating tube. The heating tube heats the liquid and then transmits the temperature of the liquid into the heating chamber, providing a stable temperature. At the same time, the stirring mechanism can stir the powder in the heating chamber so that the powder can be heated evenly, thereby solving the problem of uneven heating in some powder heating devices for additive manufacturing. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A perspective view of a powder heating device for additive manufacturing;

[0026] Figure 2 An exploded view of a powder heating device for additive manufacturing;

[0027] Figure 3 A cross-sectional view of a powder heating device for additive manufacturing;

[0028] Figure 4 for Figure 3 A partial enlarged view of .

[0029] Main component symbols

[0030] 100. Powder heating device for additive manufacturing; 1. Tank body; 11. Tank cover; 111. Feed port; 12. Hydraulic rod; 13. Heating chamber; 14. Heat supply chamber; 141. Heat conduction groove; 2. Stirring mechanism; 21. Motor; 22. Transmission assembly; 23. Stirring head; 24. Protective cover; 241. Holes; 3. Heating tube; 4. Liquid circulation assembly; 41. Liquid pipe; 42. Water pump; 5. Discharge port; 51. Discharge chamber; 52. Blocking rod; 6. Lifting assembly; 7. Bracket. DETAILED DESCRIPTION

[0031] The embodiments of the present application will be described below in conjunction with 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.

[0032] It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a central component at the same time. When a component is considered to be "located on" another component, it may be directly located on the other component or there may be a central component at the same time. The terms "top", "bottom", "upper", "lower", "left", "right", "front", "back", and similar expressions used herein are for illustrative purposes only.

[0033] An embodiment of the present application provides a powder heating device for additive manufacturing, comprising:

[0034] A tank body, wherein the tank body has a heating cavity, a heat supply cavity is arranged between the heating cavity and the outer wall of the tank body, a heat conduction groove is arranged in the heat supply cavity, and the heat conduction groove is arranged around the side wall of the heat supply cavity;

[0035] A stirring mechanism, wherein the stirring mechanism is disposed on the tank body, one end of the stirring mechanism extends into the heating chamber, and the stirring mechanism is used to stir the powder;

[0036] A heating pipe, the heating pipe is arranged in the heating cavity and is used to heat the liquid in the heating cavity;

[0037] A liquid circulation component, the liquid circulation component is connected to the heating cavity and is used to inject or discharge liquid into the heating cavity;

[0038] After the liquid enters the heating cavity, it flows along the heat-conducting groove, and the heat-conducting groove introduces the heat in the liquid into the heating cavity.

[0039] Some embodiments of the present application are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0040] The powder heating device for additive manufacturing provided above is designed with a stirring mechanism and a heating tube 3. The heating tube 3 heats the liquid and then transmits the temperature of the liquid into the heating chamber, thereby providing a stable temperature. At the same time, the stirring mechanism can stir the powder in the heating chamber so that the powder can be heated evenly, thereby solving the problem of uneven heating in some powder heating devices for additive manufacturing.

[0041] See also Figure 1-Figure 4 The embodiment of the present application provides a powder heating device 100 for additive manufacturing, comprising a tank body 1, a stirring mechanism 2 and a heating tube 3, wherein the tank body 1 has a heating chamber 13, a heating chamber 14 is provided between the heating chamber 13 and the outer wall of the tank body 1, a heat conduction groove 141 is provided in the heating chamber 14, and the heat conduction groove 141 is arranged around the side wall of the heating chamber 14, the stirring mechanism 2 is arranged on the tank body 1, one end of the stirring mechanism 2 extends into the heating chamber 13, the stirring mechanism 2 is used to stir the powder, the heating tube 3 is arranged in the heating chamber 14, and is used to heat the liquid in the heating chamber 14, the liquid circulation component 4 is connected to the heating chamber 14, and is used to inject or discharge liquid into the heating chamber 14, wherein the liquid flows along the heat conduction groove 141 after entering the heating chamber 14, and the heat conduction groove 141 introduces the heat in the liquid into the heating chamber 13.

[0042] Specifically, the tank body 1 and the heating chamber 13 are designed to provide a tank body 1 including a heating chamber 13 for containing powder and performing a heating process. By setting the heating chamber 13 in the tank body 1, the heating process of the powder can be more effectively controlled to ensure that the powder can maintain an appropriate state within the required temperature range during the laser melting process. The heat conduction groove 141 is arranged around the side wall of the heating chamber 14 to guide the flow of the liquid. Through the setting of the heat conduction groove 141, the heat in the liquid can be more effectively introduced into the heating chamber 13, the heating efficiency can be improved, and the temperature can be evenly distributed. The stirring mechanism 2 is designed to stir the powder to ensure that the powder is evenly mixed. The evenly mixed powder can better respond to the heating process, improve the printing quality, and avoid problems caused by uneven heat distribution. The heating tube 3 is set to heat the liquid in the heating chamber 14. By heating the liquid in the heating chamber 14 through the heating tube 3, the temperature in the heating chamber 13 can be kept constant, thereby preheating the powder in the heating chamber 13, so that the powder has a certain temperature before the laser melting process, ensuring that the powder reaches the required melting point during the laser melting process, and promoting melting and layered accumulation. Through the liquid circulation component 4, the flow of the liquid can be flexibly controlled to achieve precise control of the heating process, thereby ensuring the stability and controllability of the laser melting process.

[0043] In a specific example, the stirring mechanism 2 includes a motor 21, a transmission assembly 22 and a stirring head 23, one end of the transmission assembly 22 is synchronously connected to the output end of the motor 21, and the other end of the transmission assembly 22 is fixedly connected to the stirring head 23, and the stirring head 23 is used to stir powder.

[0044] Specifically, the motor 21 provides power, the transmission assembly 22 transmits power, and the stirring head 23 is used to actually stir the powder. Through the action of the motor 21, the transmission assembly 22 transmits power to the stirring head 23, ensuring that the powder is evenly stirred in the heating chamber 13, thereby improving the uniformity of the powder.

[0045] In a specific example, a protective cover 24 is provided on a side of the transmission assembly 22 away from the tank body 1 , and the protective cover 24 is used to protect a synchronous belt between the transmission assembly 22 and the motor 21 .

[0046] Specifically, the protective cover 24 is used to protect the transmission assembly 22 and the synchronous belt from interference and damage from the external environment, thereby ensuring that the transmission assembly 22 is not affected by external factors during operation, thereby improving the reliability and durability of the system.

[0047] In a specific example, the protective cover 24 is provided with a hole 241 , and the hole 241 is used for heat dissipation.

[0048] Specifically, the holes 241 are used to dissipate heat and prevent the transmission component 22 from overheating. The synchronous belt structure generates heat when in motion, so it is necessary to open the holes 241 to keep the temperature from overheating, keep the transmission component 22 within an appropriate temperature range, prevent overheating, and improve the stability of the system. At the same time, the arrangement of multiple and dense holes 241 is to reduce dust from entering the protective cover 24 as much as possible, thereby ensuring the cleanliness of the synchronous belt to a certain extent.

[0049] In a specific example, the heating chamber 13 is provided with a discharge port 5, and a discharge cavity 51 is opened in the discharge port 5. One end of the discharge cavity 51 is connected to the heating chamber 13, and the other end is connected to the outside. The discharge cavity 51 is used to discharge the powder in the heating chamber 13;

[0050] A blocking rod 52 is disposed in the discharge chamber 51 . One end of the blocking rod 52 is located in the heating chamber 13 and abuts against the discharge port 5 . The blocking rod 52 is used to block powder from entering the discharge chamber 51 .

[0051] Specifically, the discharge port 5 is provided in the heating chamber 13, and is used to discharge the powder in the heating chamber 13 and connect to the outside. The blocking rod 52 is located in the discharge port 5, and one end of the blocking rod 52 abuts against the discharge port 5, and is used to prevent the powder from entering the discharge port 5. Through the discharge port 5, the powder can be discharged in an orderly manner when needed, ensuring the accuracy and controllability of the manufacturing process. The blocking rod 52 prevents unnecessary powder loss and ensures the accuracy and quality of the product.

[0052] In a specific example, a lifting assembly 6 is provided on a side of the discharge port 5 away from the stirring mechanism 2, and the blocking rod 52 extends into the lifting assembly 6, and the lifting assembly 6 is used to control the movement of the blocking rod 52;

[0053] When the blocking rod 52 moves in a direction away from the discharge port 5, the powder flows into the discharge cavity 51 from the gap between the blocking rod 52 and the discharge port 5;

[0054] When the blocking rod 52 moves toward the discharge port 5 , the blocking rod 52 finally abuts against the discharge port 5 to block the powder from entering the discharge cavity 51 .

[0055] Specifically, the lifting assembly 6 controls the up and down movement of the blocking rod 52. Through the lifting assembly 6, the position of the blocking rod 52 can be adjusted to control the flow and blocking of the powder, thereby improving the printing accuracy and the flexibility of controlling the material flow. When the blocking rod 52 moves in the direction away from the discharge port 5, the gap is opened to allow the powder to flow into the discharge chamber 51 from the gap between the blocking rod 52 and the discharge port 5. In the early stage of printing, the powder can flow smoothly into the discharge chamber 51 to ensure the uniformity and timeliness of material delivery. When the blocking rod 52 moves in the direction close to the discharge port 5, the blocking rod 52 eventually abuts against the discharge port 5 to prevent the powder from entering the discharge chamber 51. When it is necessary to stop or adjust the material flow, the abutment between the blocking rod 52 and the discharge port 5 effectively blocks the entry of the powder, ensuring the accuracy and precision of the operation.

[0056] In a specific example, the tank body 1 further includes a tank cover 11, wherein the tank cover 11 is disposed on the heating chamber 13, the stirring mechanism 2 is disposed on the tank cover 11, and a hydraulic rod 12 is disposed between the tank cover 11 and the tank body 1, wherein the hydraulic rod 12 is used to control the movement of the tank cover 11.

[0057] Specifically, the tank cover 11 covers the heating chamber 13 to form a closed space, ensuring that it is not affected by the external environment during the working process. Preventing external impurities, dust and other substances from entering the heating chamber 13, maintaining the cleanliness of the working environment, and helping to maintain the stability and performance of the equipment. The stirring mechanism 2 is located above the tank cover 11 and can easily enter the heating chamber 13 to stir the powder. It provides a better stirring working space, reduces the interference of stirring on the equipment structure, and makes the stirring process more efficient.

[0058] In a specific example, the liquid circulation component 4 includes a water pump 42 and a liquid pipe 41 . The liquid pipe 41 is connected to the heating chamber 14 . The water pump 42 is disposed on the liquid pipe 41 to control the liquid pipe 41 to extract or inject liquid.

[0059] Specifically, the water pump 42 is used to generate fluid power to drive the liquid to circulate in the system. It is ensured that the liquid has enough power to be pumped out of the heating chamber 14 or injected into the heating chamber 14. The liquid transported by the water pump 42 is connected to the heating chamber 13 to form a circulation passage. It is ensured that the liquid can flow into and out of the heating chamber 14 smoothly, so that the liquid circulation of the entire system is unobstructed.

[0060] In a specific example, the can cover 11 is provided with a feed port 111 for injecting external powder.

[0061] Specifically, a channel is provided through which powder material can be injected into the interior of the tank body 1 .

[0062] The filling or replenishment of powder in the additive manufacturing device is realized, ensuring that the device can continue to work, making it more flexible and changeable. When the operator needs to replace or add powder material, the closed state of the feed port 111 is released. The required powder material is injected into the tank body 1 through the feed port 111 to ensure that the working area is fully filled. The feed port 111 is then re-closed to ensure that the powder will not overflow or be disturbed by the outside world during the laser melting process.

[0063] In a specific example, a bracket 7 is further included, and the tank body 1 is arranged on the bracket 7 .

[0064] Specifically, the bracket 7 provides a stable structural support to fix the important components of the entire additive manufacturing device on a frame. Through the bracket 7, the relative position between the tank body 1 and the stirring mechanism 2 can be ensured to be stable, reducing the impact of vibration and movement on the operation of the device.

[0065] The above is only an implementation method of the present application. It should be pointed out that a person skilled in the art can make improvements without departing from the inventive concept of the present application, but these improvements are within the scope of protection of the present application.

Claims

1. A powder heating device for additive manufacturing, characterized in that: include: A tank body, wherein the tank body has a heating cavity, a heat supply cavity is arranged between the heating cavity and the outer wall of the tank body, a heat conduction groove is arranged in the heat supply cavity, and the heat conduction groove is arranged around the side wall of the heat supply cavity; A stirring mechanism, the stirring mechanism is arranged on the tank body, one end of the stirring mechanism extends into the heating chamber, and the stirring mechanism is used to stir the powder; A heating pipe, the heating pipe is arranged in the heating cavity and is used to heat the liquid in the heating cavity; A liquid circulation component, the liquid circulation component is connected to the heating cavity and is used to inject or discharge liquid into the heating cavity; After the liquid enters the heating cavity, it flows along the heat-conducting groove, and the heat-conducting groove introduces the heat in the liquid into the heating cavity.

2. The powder heating device for additive manufacturing according to claim 1, characterized in that: The stirring mechanism comprises a motor, a transmission assembly and a stirring head. One end of the transmission assembly is synchronously connected to the output end of the motor, and the other end of the transmission assembly is fixedly connected to the stirring head. The stirring head is used to stir powder.

3. The powder heating device for additive manufacturing according to claim 2, characterized in that: A protective cover is provided on a side of the transmission assembly away from the tank body, and the protective cover is used to protect the synchronous belt between the transmission assembly and the motor.

4. The powder heating device for additive manufacturing according to claim 3, characterized in that: The protective cover is provided with holes, and the holes are used for heat dissipation.

5. The powder heating device for additive manufacturing according to claim 4, characterized in that: The heating chamber is provided with a discharge port, and a discharge cavity is opened in the discharge port. One end of the discharge cavity is connected to the heating chamber, and the other end is connected to the outside. The discharge cavity is used to discharge the powder in the heating chamber; A blocking rod is provided in the discharge cavity, one end of the blocking rod is located in the heating cavity and abuts against the discharge port, and the blocking rod is used to block powder from entering the discharge cavity.

6. The powder heating device for additive manufacturing according to claim 5, characterized in that: A lifting assembly is provided on a side of the discharge port away from the stirring mechanism, the blocking rod extends into the lifting assembly, and the lifting assembly is used to control the movement of the blocking rod; When the blocking rod moves in a direction away from the discharge port, the powder flows into the discharge cavity from the gap between the blocking rod and the discharge port; When the blocking rod moves toward the direction close to the discharge port, the blocking rod finally abuts against the discharge port to block the powder from entering the discharge cavity.

7. The powder heating device for additive manufacturing according to claim 1, characterized in that: The tank body also includes a tank cover, which is arranged on the heating chamber. The stirring mechanism is arranged on the tank cover. A hydraulic rod is arranged between the tank cover and the tank body, and the hydraulic rod is used to control the movement of the tank cover.

8. The powder heating device for additive manufacturing according to claim 1, characterized in that: The liquid circulation component includes a water pump and a liquid pipe. The liquid pipe is communicated with the heating chamber. The water pump is arranged on the liquid pipe and is used to control the liquid pipe to extract liquid or inject liquid.

9. The powder heating device for additive manufacturing according to claim 7, characterized in that: The can cover is provided with a feeding port for injecting external powder.

10. The powder heating device for additive manufacturing according to claim 1, characterized in that: It also includes a bracket, and the tank body is arranged on the bracket.

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