阅读说明：本技术 增材制造增强散热金属零件的方法 (Method for manufacturing enhanced heat dissipation metal part in additive mode ) 是由 梁祖磊 孙中刚 陈小龙 李永华 于 2021-01-13 设计创作，主要内容包括：本发明提供一种增材制造增强散热金属零件的方法,包括以下步骤：在打印前通过三维建模软件为低导热率金属零件添加异质散热通道结构,异质散热通道结构的通道一侧处于高温区,另一侧处于散热区；将低导热率金属零件与异质散热通道结构装配为一个整体导入切片软件划分沉积层；利用金属零件材料以及异质材料逐层打印,直到打印完成,得到包含异质散热通道结构的低导热率零件毛坯,其中在同一沉积层内,使用一种或多种高热导率材料沉积散热通道结构,使用零件材料沉积零件结构；对低导热率零件毛坯进行机加工,去除基板,得到散热改善的低导热率金属零件。本方法利用金属立体成型技术在低导热率零件中添加散热通道以达到快速散热的目的。(The invention provides a method for manufacturing a reinforced heat dissipation metal part in an additive mode, which comprises the following steps of: adding a heterogeneous heat dissipation channel structure to the low-heat-conductivity metal part through three-dimensional modeling software before printing, wherein one side of a channel of the heterogeneous heat dissipation channel structure is positioned in a high-temperature region, and the other side of the channel is positioned in a heat dissipation region; assembling the low-thermal-conductivity metal part and the heterogeneous heat dissipation channel structure into an integral imported slice software division deposition layer; printing layer by utilizing metal part materials and heterogeneous materials until printing is finished to obtain a low-heat-conductivity part blank containing a heterogeneous heat dissipation channel structure, wherein in the same deposition layer, one or more high-heat-conductivity materials are used for depositing the heat dissipation channel structure, and the part materials are used for depositing the part structure; and machining the low-heat-conductivity part blank, and removing the substrate to obtain the low-heat-conductivity metal part with improved heat dissipation. The method utilizes the metal three-dimensional forming technology to add the heat dissipation channel in the low-heat-conductivity part so as to achieve the purpose of rapid heat dissipation.)

1. A method of additive manufacturing a heat sink enhanced metal part, comprising the steps of:

step 1, before additive manufacturing printing, adding a heterogeneous heat dissipation channel structure for a low-heat-conductivity metal part to be printed through three-dimensional modeling software, wherein the heterogeneous heat dissipation channel is determined according to the type of the printed part; one side of the channel of the heterogeneous heat dissipation channel structure is positioned in the high-temperature area, and the other side of the channel of the heterogeneous heat dissipation channel structure is positioned in the heat dissipation area;

step 2, assembling the low-thermal-conductivity metal part and the heterogeneous heat dissipation channel structure into an integral imported slice software division deposition layer;

step 3, printing layer by layer on the substrate by utilizing the low-thermal-conductivity metal part material and the heterogeneous material of the heat dissipation channel structure until printing is completed to obtain a low-thermal-conductivity part blank containing the heterogeneous heat dissipation channel structure, wherein in the same deposition layer, one or more high-thermal-conductivity materials are used for depositing the heat dissipation channel structure, and the part material is used for depositing the part structure;

and 4, machining the low-thermal-conductivity part blank, and removing the substrate to obtain the low-thermal-conductivity metal part with improved heat dissipation.

2. The method of additive manufacturing an enhanced heat dissipating metal part according to claim 1, wherein the heterogeneous heat dissipating channel structure is one of a tree-shaped heat dissipating channel structure, a grid-shaped heat dissipating channel structure, or a corolla-shaped heat dissipating channel structure.

3. The method of additive manufacturing an enhanced heat dissipating metal part according to claim 1, wherein the low thermal conductivity metal part is a stainless steel part, a titanium alloy part, or a high temperature alloy part.

4. The method of additive manufacturing an enhanced heat dissipating metal part according to claim 3, wherein the heterogeneous material of the heterogeneous heat dissipating channel structure is a copper alloy or an aluminum alloy.

5. The method of claim 1, wherein in step 1, a tree-shaped heat dissipation channel structure or a grid-shaped heat dissipation channel structure is added when a heterogeneous heat dissipation channel structure is added to the low-thermal-conductivity metal part with one side contacting the high-temperature region and the other part contacting the low-temperature region.

6. The method of additive manufacturing of heat dissipation enhancing metal parts of claim 5, wherein during printing, the low thermal conductivity metal parts and the heterogeneous heat dissipation channel structure are printed in a layer-by-layer deposition modeling manner until printing is completed.

7. The method for manufacturing the enhanced heat dissipation metal part in the additive manner according to claim 1, wherein in the step 1, for the metal part with low thermal conductivity, the center of which is in contact with the high temperature region, and the other edge part of which is in contact with the low temperature region, when the heterogeneous heat dissipation channel structure is added, a crown-shaped heat dissipation channel structure is added, so that a plurality of heat dissipation channels with high thermal conductivity are formed, and the center and the periphery of the part are connected.

8. The method of additive manufacturing of heat dissipation enhancing metal parts as recited in claim 7, wherein during the printing process, the low thermal conductivity metal parts are printed to a predetermined height, and then the low thermal conductivity metal parts and the heterogeneous heat dissipation channel structure are printed by layer-by-layer deposition modeling until the printing is completed.

Technical Field

The invention relates to the technical field of metal part additive manufacturing, in particular to a method for manufacturing a reinforced heat dissipation metal part in an additive mode.

Background

Different from traditional 'material reduction' and 'material equal' manufacturing, additive manufacturing can directly manufacture parts through a material adding method based on a data model. Compared with the traditional manufacturing method, the additive manufacturing technology can manufacture complex parts which are difficult to process with high efficiency and low cost, and has wide application prospect in the aspects of aerospace, automobiles and biomedical treatment. According to different molding modes, additive manufacturing can be divided into a pre-spreading mode and a feeding mode. The feeding type additive technology is generally adopted for metal three-dimensional forming, the feeding modes comprise a powder feeding mode and a wire feeding mode, and the method is suitable for rapid forming of small-batch and large-size metal parts.

The metal three-dimensional forming process is to pile up metal materials on a base material point by point according to a certain filling path to form a deposition layer by a synchronous feeding cladding method under the control of a numerical control system, and finally form the three-dimensional solid part by layer. The type of the deposited material can be changed according to the need by using the metal three-dimensional forming technology, for example, materials such as stainless steel, titanium alloy and the like are adopted to form light additive manufacturing parts, and low-thermal-conductivity parts are easy to cause heat accumulation in the using process and influence the using performance of equipment or devices.

Disclosure of Invention

The invention aims to provide a method for manufacturing a reinforced heat dissipation metal part in an additive mode.

In order to achieve the above object, the method for manufacturing the enhanced heat dissipation metal part by the additive manufacturing method provided by the invention comprises the following steps:

step 1, before additive manufacturing printing, adding a heterogeneous heat dissipation channel structure for a low-heat-conductivity metal part to be printed through three-dimensional modeling software, wherein the heterogeneous heat dissipation channel is determined according to the type of the printed part; one side of the channel of the heterogeneous heat dissipation channel structure is positioned in the high-temperature area, and the other side of the channel of the heterogeneous heat dissipation channel structure is positioned in the heat dissipation area;

step 2, assembling the low-thermal-conductivity metal part and the heterogeneous heat dissipation channel structure into an integral imported slice software division deposition layer;

step 3, printing layer by layer on the substrate by utilizing the low-thermal-conductivity metal part material and the heterogeneous material of the heat dissipation channel structure until printing is completed to obtain a low-thermal-conductivity part blank containing the heterogeneous heat dissipation channel structure, wherein in the same deposition layer, one or more high-thermal-conductivity materials are used for depositing the heat dissipation channel structure, and the part material is used for depositing the part structure;

and 4, machining the low-thermal-conductivity part blank, and removing the substrate to obtain the low-thermal-conductivity metal part with improved heat dissipation.

Preferably, the heterogeneous heat dissipation channel structure is one of a tree-shaped heat dissipation channel structure, a grid-shaped heat dissipation channel structure, or a corolla-shaped heat dissipation channel structure.

Preferably, the low thermal conductivity metal part is a stainless steel part, a titanium alloy part, or a high temperature alloy part.

Preferably, the heterogeneous material of the heterogeneous heat dissipation channel structure is a copper alloy or an aluminum alloy.

Preferably, in step 1, for the low thermal conductivity metal part with one side contacting the high temperature region and the other part contacting the low temperature region, when the heterogeneous heat dissipation channel structure is added, a tree-shaped heat dissipation channel structure or a grid-shaped heat dissipation channel structure is added.

Preferably, in the printing process, the low-thermal-conductivity metal part and the heterogeneous heat dissipation channel structure are printed in a layer-by-layer deposition forming mode until the printing is finished.

Preferably, in step 1, for the low thermal conductivity metal part of which the center is in contact with the high temperature region and the other edge portion is in contact with the low temperature region, when a heterogeneous heat dissipation channel structure is added, a crown-shaped heat dissipation channel structure is added to form a plurality of high thermal conductivity heat dissipation channels connecting the center and the periphery of the part.

Preferably, in the printing process, the low-thermal-conductivity metal part with the preset height is printed firstly, and then the low-thermal-conductivity metal part and the heterogeneous heat dissipation channel structure are printed in a layer-by-layer deposition forming mode until the printing is finished.

According to the technical scheme, the method for manufacturing the enhanced heat dissipation metal part in the additive mode adds the heat dissipation channel to the part with low heat conductivity by processing the part model, then slices the model containing the part and the heat dissipation channel, forms the heat dissipation channel and the part by respectively using the material with high heat conductivity and the material of the part through the metal three-dimensional forming technology, finally forms a part blank containing the heterogeneous heat dissipation channel by layer deposition, and then carries out necessary machining or post-processing to obtain the part with good heat dissipation performance.

According to the method for enhancing the heat dissipation performance of the part by the metal three-dimensional molding heterogeneous heat dissipation channel, the heat dissipation channel is added to the part with low heat conductivity, so that the heat dissipation capacity of the part with low heat conductivity is enhanced, and the use performance of corresponding equipment or devices is improved.

It should be understood that all combinations of the foregoing concepts and additional concepts described in greater detail below can be considered as part of the inventive subject matter of this disclosure unless such concepts are mutually inconsistent. In addition, all combinations of claimed subject matter are considered a part of the presently disclosed subject matter.

The foregoing and other aspects, embodiments and features of the present teachings can be more fully understood from the following description taken in conjunction with the accompanying drawings. Additional aspects of the present invention, such as features and/or advantages of exemplary embodiments, will be apparent from the description which follows, or may be learned by practice of specific embodiments in accordance with the teachings of the present invention.

Drawings

The drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component that is illustrated in various figures may be represented by a like numeral. For purposes of clarity, not every component may be labeled in every drawing. Embodiments of various aspects of the present invention will now be described, by way of example, with reference to the accompanying drawings, in which:

FIG. 1 is a flow chart of a method for enhancing heat dissipation performance of a low-thermal-conductivity part by using a metal three-dimensional forming heterogeneous heat dissipation channel according to the invention.

Fig. 2-4 are schematic diagrams of a process for printing features and heterogeneous heat dissipation channel structures in different materials of low thermal conductivity metal parts in different embodiments. Wherein, fig. 2 shows a printing process of a stainless steel part containing a copper alloy heat dissipation channel, fig. 3 shows a printing process of a titanium alloy part containing an aluminum alloy heat dissipation channel, and fig. 4 shows a printing process of a high temperature alloy part containing an aluminum alloy heat dissipation channel.

Detailed Description

In order to better understand the technical content of the present invention, specific embodiments are described below with reference to the accompanying drawings.

In this disclosure, aspects of the present invention are described with reference to the accompanying drawings, in which a number of illustrative embodiments are shown. Embodiments of the present disclosure are not necessarily intended to include all aspects of the invention. It should be appreciated that the various concepts and embodiments described above, as well as those described in greater detail below, may be implemented in any of numerous ways, as the disclosed concepts and embodiments are not limited to any one implementation. In addition, some aspects of the present disclosure may be used alone, or in any suitable combination with other aspects of the present disclosure.

With reference to fig. 1, an exemplary embodiment of the present invention proposes a method of additive manufacturing a heat-dissipating metal part, comprising the steps of: step 1, before additive manufacturing printing, adding a heterogeneous heat dissipation channel structure for a low-heat-conductivity metal part to be printed through three-dimensional modeling software, wherein the heterogeneous heat dissipation channel is determined according to the type of the printed part; one side of the channel of the heterogeneous heat dissipation channel structure is positioned in the high-temperature area, and the other side of the channel is positioned in the heat dissipation area; step 2, assembling the low-thermal-conductivity metal part and the heterogeneous heat dissipation channel structure into an integral imported slice software division deposition layer; step 3, printing layer by layer on the substrate by utilizing the low-thermal-conductivity metal part material and the heterogeneous material of the heat dissipation channel structure until printing is completed to obtain a low-thermal-conductivity part blank containing the heterogeneous heat dissipation channel structure, wherein in the same deposition layer, one or more high-thermal-conductivity materials are used for depositing the heat dissipation channel structure, and the part material is used for depositing the part structure; and 4, machining the low-thermal-conductivity part blank, and removing the substrate to obtain the low-thermal-conductivity metal part with improved heat dissipation.

Preferably, the heterogeneous heat dissipation channel structure is one of a tree-shaped heat dissipation channel structure, a grid-shaped heat dissipation channel structure, or a corolla-shaped heat dissipation channel structure.

Preferably, the low thermal conductivity metal part is a stainless steel part, a titanium alloy part, or a high temperature alloy part. The heterogeneous material of the heterogeneous heat dissipation channel structure is copper alloy or aluminum alloy.

Preferably, in step 1, for the low thermal conductivity metal part with one side contacting the high temperature region and the other part contacting the low temperature region, when the heterogeneous heat dissipation channel structure is added, a tree-shaped heat dissipation channel structure or a grid-shaped heat dissipation channel structure is added.

Preferably, in the printing process, the low-thermal-conductivity metal part and the heterogeneous heat dissipation channel structure are printed in a layer-by-layer deposition forming mode until the printing is finished.

Preferably, in step 1, for the low thermal conductivity metal part of which the center is in contact with the high temperature region and the other edge portion is in contact with the low temperature region, when a heterogeneous heat dissipation channel structure is added, a crown-shaped heat dissipation channel structure is added to form a plurality of high thermal conductivity heat dissipation channels connecting the center and the periphery of the part.

Preferably, in the printing process, the low-thermal-conductivity metal part with the preset height is printed firstly, and then the low-thermal-conductivity metal part and the heterogeneous heat dissipation channel structure are printed in a layer-by-layer deposition forming mode until the printing is finished.

We will now describe the implementation of the method of the present invention for additive manufacturing of a heat dissipation enhanced metal part by metal stereolithography heterogeneous heat dissipation channels to enhance the heat dissipation performance of a low thermal conductivity part, in conjunction with the specific processes shown in fig. 2-4.

Example 1

Referring to fig. 2, when the low thermal conductivity part wei stainless steel part has a thermal conductivity of 16W/(m · K), one side of the part contacts the high temperature region, the other side contacts the low temperature region, and the temperature is significantly lower than the other part of the part, a high thermal conductivity material heat dissipation channel structure communicating the two sides of the part can be designed, for example, a copper alloy is used as a high thermal conductivity hetero material tree-shaped heat dissipation channel structure, the thermal conductivity is about 383W/(m · K), a tree crown of the tree-shaped structure contacts the high temperature region, and dispersed tree-shaped parts contact the low temperature region to increase the heat dissipation performance of the part, and the part is prepared by three-dimensional metal forming.

As shown in fig. 2, when the stainless steel part is prepared by metal stereo forming, a heat dissipation channel structure of a heterogeneous material can be designed for the stainless steel part through three-dimensional modeling software, and then the part and the heat dissipation channel are assembled into an integral body and introduced into slicing software to divide a deposition layer; and depositing part parts by using a stainless steel material and depositing a heat dissipation channel structure by using a copper alloy material in the same deposition layer, so that the stainless steel part containing the copper alloy heat dissipation channel is formed by deposition layer by layer.

Example 2

Referring to fig. 3, when the low thermal conductivity part is a titanium alloy part, the thermal conductivity of the part is about 15W/(m · K), one side of the part is in contact with the high temperature region, the other side is in contact with the low temperature region, and the temperature of the part is significantly lower than that of other parts of the part, several heat dissipation channel structures made of high thermal conductivity material may be designed, for example, an aluminum alloy material is used as a heterogeneous material grid-shaped heat dissipation channel structure with high thermal conductivity, the thermal conductivity of the material is about 230W/(m · K), one side of the grid-shaped heat dissipation channel structure is in contact with the high temperature region, and the other side is in contact with the.

As shown in fig. 3, when the titanium alloy part is prepared by metal stereo forming, a heterogeneous heat dissipation channel structure can be designed for the titanium alloy part through three-dimensional modeling software, and then the part and the heat dissipation channel are assembled into an integral guided-in slicing software to divide a deposition layer; in the same deposition layer, the titanium alloy material is used for depositing part parts, and the aluminum alloy material is used for depositing the heat dissipation channel, so that the titanium alloy part containing the aluminum alloy heat dissipation channel is formed by deposition layer by layer.

Example 3

Referring to fig. 4, when the low thermal conductivity part is a high temperature alloy part, the thermal conductivity of the part is about 12W/(m · K), the center of the part contacts the high temperature region, and the other side of the part contacts the low temperature region, and the temperature of the part is significantly lower than that of the other part, a plurality of heat dissipation channels with high thermal conductivity connecting the center and the periphery of the part may be designed in the upper half of the part, for example, an aluminum alloy material is used as a high thermal conductivity heterogeneous material, the thermal conductivity of the part is about 230W/(m · K), one side of the heat dissipation channel with a flower crown contacts the high temperature region, and the other side contacts the low temperature region, so as to increase the heat dissipation performance.

As shown in fig. 4, when the high-temperature alloy part is prepared by metal three-dimensional molding, a heat dissipation channel structure can be designed for the high-temperature alloy part through three-dimensional modeling software, and then the part and the heat dissipation channel are assembled into a whole and guided into slicing software to divide a deposition layer; when the high-temperature alloy part is printed, firstly, the low-thermal-conductivity metal part with the preset height is printed, then, the high-temperature alloy material deposition part is printed in a layer-by-layer deposition forming mode, and the aluminum alloy material deposition heat dissipation channel is used, so that the high-temperature alloy part containing the aluminum alloy heat dissipation channel is formed in a layer-by-layer deposition forming mode.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the protection scope of the present invention should be determined by the appended claims.