Yarn and powder synergistic additive manufacturing device

Abstract

The utility model belongs to the technical field of additive manufacturing, and discloses a wire and powder synergistic additive manufacturing device which comprises an additive manufacturing device body, the additive manufacturing device body comprises a deposition head, the deposition head comprises a plurality of through holes, the through holes are formed in the deposition head, the through holes are evenly distributed, and the thickness of the through holes is larger than that of the deposition head. The plurality of through holes are circumferentially distributed along the central axis of the deposition head; the collecting bin is arranged in the deposition head, the collecting bin communicates with the through hole, and the collecting bin is of an arc-shaped structure; the suction pump is arranged in the deposition head, and the suction pump is communicated with the collection bin through a pipeline; a fan is arranged in the collecting bin, a blind hole is formed in the powder feeding pipeline of the deposition head, and the fan is matched with the blind hole; according to the scheme, the deposition head is provided with the through hole and the collection bin and is connected with the suction pump, powder splashed out of the deposition nozzle can be actively adsorbed, and the problem that the thickness of a deposition layer is not uniform due to powder splashing is effectively solved; the laser deposition head solves the problem of powder splashing of the laser deposition head.

Description

Technical Field

[0001] The present invention belongs to the technical field of additive manufacturing, and specifically relates to a silk powder collaborative additive manufacturing device. Background Art

[0002] Additive manufacturing technology, also known as 3D printing technology, uses laser as processing heat source and powder as processing raw material to deposit and stack layer by layer on the substrate to form the required parts. The coaxial powder feeding method is used to output the laser focus and the powder convergence point from one device, and build complex three-dimensional solid parts in a layer-by-layer accumulation manner. The additive manufacturing system is generally composed of an additive deposition heat source, an additive feeding device, an additive deposition head, a protective gas delivery device and a control system, among which the additive deposition head plays a greater role in manufacturing accuracy.

[0003] For example, the existing publication (announcement) number is "CN112172138B", which is a laser deposition head device with adjustable horizontal spacing of light and powder and a light and powder non-coaxial additive manufacturing method. The device includes an optical path system, a powder path system and a light and powder position adjustment system. Before laser deposition manufacturing of components, the light and powder horizontal spacing adjustment device is adjusted to change the horizontal spacing of the powder spot relative to the light spot, so that the light spot is located in front of the powder spot, so that the position of the light spot and the powder spot can be accurately adjusted in the horizontal direction. The powder splashing phenomenon caused by the overlap of the powder spot and the light spot is reduced, and the utilization rate of the powder is improved.

[0004] The above-mentioned laser deposition head has the following defects: (1) Although the above-mentioned laser deposition head can effectively reduce the strong splashing phenomenon of powder caused by the direct action of laser by placing the light spot in front of the powder spot, the powder may still splash from the deposition nozzle, affecting the thickness control of the deposition layer and the accuracy of the part geometry. (2) Since the deposition head uses laser as a heat source and the energy is concentrated, when the laser beam is focused to heat the powder material and the wire to a molten state, there will be a higher temperature in the deposition head area, and in the process of layer-by-layer deposition, the heat will be superimposed, causing thermal expansion of the deposited part. (3) The powder in the existing deposition head powder delivery pipeline is easily accumulated and blocked in the pipeline, resulting in uneven powder delivery. Utility Model Content

[0005] The purpose of this scheme is to provide a silk-powder collaborative additive manufacturing device to solve the problem of powder splashing in the laser deposition head.

[0006] In order to achieve the above-mentioned object, the present invention provides a silk powder collaborative additive manufacturing device, including an additive manufacturing device body, the additive manufacturing device body includes a deposition head, and the deposition head includes:

[0007] A through hole, wherein the through hole is provided on the deposition head;

[0008] A collecting chamber, the collecting chamber is arranged in the deposition head, and the collecting chamber is communicated with the through hole;

[0009] A suction pump is arranged in the deposition head and is connected to the collection bin through a pipeline.

[0010] The principle of this solution is that when the suction pump is working, the powder splashed from the deposition nozzle is sucked into the collection bin through the through hole, thereby avoiding the powder splashing from the deposition nozzle.

[0011] The technical effects of this solution are as follows: (1) By setting a through hole and a collection bin on the deposition head and connecting a suction pump, the powder splashed out from the deposition nozzle can be actively adsorbed, effectively reducing the problem of uneven thickness of the deposition layer caused by powder splashing, thereby improving the accuracy of additive manufacturing. (2) The splashed powder is collected in the collection bin, which can be reused and reduce powder pollution in the working environment. (3) Since the suction pump generates suction, it can absorb the heat generated near the deposition nozzle to avoid thermal expansion of the deposited part due to excessive local temperature.

[0012] Furthermore, there are multiple through holes, and the multiple through holes are evenly distributed.

[0013] The principle and effect of this solution is that a plurality of evenly distributed through holes are provided to increase the area for adsorbing powder.

[0014] Furthermore, the plurality of through holes are distributed in a circular pattern along the central axis of the deposition head.

[0015] The principle and effect of this solution is to distribute the through holes around the deposition head so as to capture the powder flying in all directions.

[0016] Furthermore, the collecting bin is an arc-shaped structure.

[0017] The principle and effect of this solution is to prevent powder from being deposited in dead corners.

[0018] Furthermore, a fan is provided in the collection bin.

[0019] The principle and effect of this solution are: (1) The suction force generated by the suction pump causes the fan to rotate, thereby better adsorbing the powder entering the through hole. (2) The fan is also provided to further increase the absorption of heat around the deposition head.

[0020] Furthermore, the powder delivery pipeline of the deposition head is provided with a blind hole, and the fan is arranged in coordination with the blind hole.

[0021] The principle and effect of this scheme are as follows: (1) The airflow generated by the rotation of the fan disturbs the powder in the collection bin and blows it into the blind hole, so that it enters the powder delivery pipe. (2) Through the above arrangement, the powder in the collection bin is prevented from accumulating too much and can be sent to the powder delivery channel again. These powders can re-enter the molten deposition process to achieve secondary utilization of the powder. (3) Since the blind hole is set on the powder delivery pipe, the fan converts the suction force of the suction pump into wind force and blows it into the blind hole. The airflow promotes the powder to move toward the sedimentation nozzle, avoiding the problem that the powder in the powder delivery pipe is easily accumulated and blocked in the pipe, resulting in uneven powder delivery.

[0022] Furthermore, the fan is arranged at an angle.

[0023] The principle and effect of this solution is that the fan is set at a certain inclined angle with the powder delivery pipe, so that the wind force generated by the fan can be inclined toward the sedimentation nozzle, which facilitates the movement of powder toward the sedimentation nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of a silk powder collaborative additive manufacturing device of the utility model;

[0025] Figure 2 It is a structural schematic diagram of the deposition head of the utility model;

[0026] Figure 3 It is a cross-sectional view of the deposition head of the utility model.

[0027] The names of the corresponding marks in the drawings are: additive manufacturing device body 1 , deposition head 2 , through hole 21 , collection bin 22 , suction pump 23 , fan 24 , powder delivery pipeline 25 . DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the concept and technical effects of the utility model in combination with the embodiments, so as to fully understand the purpose, features and effects of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the utility model:

[0029] Example:

[0030] See also Figure 1 and Figure 2A silk powder collaborative additive manufacturing device includes an additive manufacturing device body 1, the additive manufacturing device body 1 includes a deposition head 2, the deposition head 2 includes a plurality of evenly distributed through holes 21 provided on the deposition head 2 and an arc-shaped collecting bin 22 connected to the through holes 21, the arc-shaped collecting bin 22 can prevent powder from being deposited in a dead corner, the plurality of through holes 21 are all distributed in a circle along the central axis of the deposition head 2, and the plurality of evenly distributed through holes 21 are provided to increase the area for adsorbing powder, and the plurality of through holes 21 are distributed around the deposition head 2, so as to capture powder splashing in all directions.

[0031] See also Figure 3 , the collection bin 22 is connected to a suction pump 23, the suction pump 23 is arranged in the deposition head 2, and the suction pump 23 is connected to the collection bin 22 through a pipeline. When the suction pump 23 is working, the powder splashed from the deposition nozzle is sucked into the collection bin 22 through the through hole 21. Thereby, powder splashed at the deposition nozzle is avoided. And by arranging the through hole 21 and the collection bin 22 at the deposition head 2, and connecting the suction pump 23, the powder splashed out at the deposition nozzle can be actively adsorbed, and the problem of uneven thickness of the deposition layer caused by powder splashing can be effectively reduced, thereby improving the accuracy of additive manufacturing. At the same time, the splashed powder is collected in the collection bin, which can be reused and reduce the powder pollution in the working environment. In addition, since the suction pump 23 generates suction, the heat generated near the deposition nozzle can be absorbed to avoid thermal expansion of the deposited part due to excessive local temperature.

[0032] A fan 24 is provided in the collection bin 22, and the suction force generated by the suction pump 23 causes the fan 24 to rotate, thereby better absorbing the powder entering the through hole. The fan 24 is provided to further increase the absorption of heat around the deposition head. The powder delivery pipe 25 of the deposition head is provided with a blind hole, and the fan 24 is provided in conjunction with the blind hole. The airflow generated by the rotation of the fan 24 disturbs the powder in the collection bin 22 and blows it into the blind hole, so that it enters the powder delivery pipe 25. Thereby, excessive accumulation of powder in the collection bin 22 is avoided, and the powder can be sent into the powder delivery channel 25 again. These powders can re-enter the molten deposition process to achieve secondary utilization of the powder. Since the blind hole is provided on the powder delivery pipe 25, the fan 24 converts the suction force of the suction pump 23 into wind force, and blows it into the blind hole, and promotes the powder to move toward the sedimentation nozzle through the airflow, thereby avoiding the problem that the powder in the powder delivery pipe 25 is easily accumulated and blocked in the pipe, resulting in uneven powder delivery. The fan 24 and the powder delivery pipe 25 are inclined at a certain angle, for example, 30 degrees, so that the wind force generated by the fan 24 can be inclined toward the settling nozzle, which facilitates the movement of powder toward the settling nozzle.

[0033] The above is only an embodiment of the utility model, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A silk powder collaborative additive manufacturing device, comprising an additive manufacturing device body (1), wherein the additive manufacturing device body (1) comprises a deposition head (2), characterized in that: The deposition head (2) comprises: A through hole (21), wherein the through hole (21) is arranged on the deposition head (2); A collecting chamber (22), the collecting chamber (22) being arranged in the deposition head (2), the collecting chamber (22) being in communication with the through hole (21); A suction pump (23), wherein the suction pump (23) is arranged in the deposition head (2), and the suction pump (23) is connected to the collection bin (22) through a pipeline.

2. The silk powder collaborative additive manufacturing device according to claim 1, characterized in that: The number of the through holes (21) is multiple, and the multiple through holes (21) are evenly distributed.

3. The silk powder collaborative additive manufacturing device according to claim 2, characterized in that: The plurality of through holes (21) are distributed in a circular pattern along the central axis of the deposition head (2).

4. The silk powder collaborative additive manufacturing device according to claim 3, characterized in that: The collecting bin (22) is an arc-shaped structure.

5. The silk powder collaborative additive manufacturing device according to claim 4, characterized in that: A fan (24) is provided in the collection bin (22).

6. The silk powder collaborative additive manufacturing device according to claim 5, characterized in that: The powder delivery pipe (25) of the deposition head (2) is provided with a blind hole, and the fan (24) is arranged in cooperation with the blind hole.

7. The silk powder collaborative additive manufacturing device according to claim 6, characterized in that: The fan (24) is arranged at an angle.

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