CN115889814A - Part forming method, terminal equipment and selective laser melting forming system - Google Patents

Abstract

The invention discloses a part forming method, terminal equipment and a selective laser melting forming system, relates to the technical field of selective laser melting forming, and is used for simplifying the forming process of parts and shortening the forming period of the parts. The part forming method comprises the steps of obtaining initial structure information of a part; determining the forming direction of the part according to the initial structure information; determining an inclined structure with a cavity of the part by combining the forming direction and the initial structure information, wherein an included angle alpha is formed between the inclined structure and the forming direction, and alpha is more than 45 degrees and less than 90 degrees; constructing a supporting structure for supporting the inclined structure in the initial structure information, and obtaining the processing structure information of the part; the support structure comprises a plurality of support plates parallel to the forming direction; controlling a forming device to perform machining forming on the part according to the machining structure information; and performing subsequent treatment to obtain the part. The terminal equipment comprises a processing module and a communication module, and the selective laser melting forming system comprises forming equipment and the terminal equipment.

Description

Part forming method, terminal equipment and laser selective melting forming system

technical field

The invention relates to the technical field of laser selective melting and forming, in particular to a part forming method, terminal equipment and a laser selective melting and forming system.

Background technique

Based on the basic idea of rapid prototyping, laser selective melting forming adopts the layer-by-layer cladding additive manufacturing method to slice and layer the three-dimensional model of the part according to a certain thickness, and then under the control of the numerical control system, the laser is used to control the melting through the galvanometer Metal powders are directly formed into parts with specific geometries. During the laser selective melting forming process, the metal powder is completely melted, resulting in metallurgical bonding. The formed parts have the characteristics of good compactness and high structure performance, and can form high-precision and complex special-shaped metal parts.

With the maturity of laser selective melting forming technology, its application fields are becoming more and more extensive, and more and more parts that cannot be realized by traditional technology are manufactured by laser selective melting forming technology. And for parts with a cavity and an inclined structure with an angle of inclination less than 45°, the cavity is used to accommodate gas or liquid. In the prior art, in the process of manufacturing by selective laser melting and forming, it is generally adopted to add an integrated support block for the inclined structure, and then remove the added support block after forming. The general method is to split the inclined structure, add support blocks for the split inclined structure, respectively shape the split inclined structures, remove the support blocks of each split inclined structure, and then The disassembled inclined structures are then welded together.

When the above method is used to process parts with a cavity and an inclined structure whose inclination angle is less than 45°, not only the parts formed after welding are prone to deformation, but also the size and deformation amount are different, which is difficult to quantify. Moreover, the quality after welding is difficult to guarantee, and metallurgical defects such as pores and lack of fusion are easily produced, which will lead to scrapping of parts in severe cases. At the same time, the process is complicated and the forming cycle of parts is prolonged.

Contents of the invention

The object of the present invention is to provide a part forming method, terminal equipment and laser selective melting forming system, which are used to simplify the forming process of the part and shorten the forming cycle of the part.

In order to achieve the above object, in a first aspect, the present invention provides a part forming method, which is applied to a laser selective melting forming system, and the laser selective melting forming system includes forming equipment. Part forming methods include:

Obtain the initial structure information of the part;

Determine the forming direction of the part according to the initial structure information;

Combining the forming direction and the initial structure information to determine the inclined structure with a cavity of the part, the angle between the inclined structure and the forming direction is α, 45°<α<90°;

The support structure used to support the inclined structure is constructed in the initial structure information to obtain the processing structure information of the part; the support structure includes a plurality of support plates parallel to the forming direction, the top of the support plate is supported on the inclined structure, and the adjacent support plates have a gap;

According to the processing structure information, control the forming equipment to process and form the parts;

Subsequent processing to obtain parts.

When the above technical solution is adopted, the part forming method provided by the present invention is applied to a laser selective melting forming system with forming equipment. In specific implementation, in the process of forming parts, the initial structure information of the parts is obtained first, and then the forming direction of the parts is determined according to the initial structure information, and then the inclined structure with a cavity of the part is determined in combination with the forming direction and the initial structure information, and the inclined structure of the part is determined. There is an included angle α between the structure and the forming direction, 45°<α<90°. Then, the support structure used to support the inclined structure is constructed in the initial structure information, so as to obtain the processing structure information of the part. Also, the support structure includes a plurality of support plates parallel to the forming direction. After that, according to the machining structure information of the parts, the forming equipment is controlled to process and shape the parts. After final processing, parts are obtained. In the part forming method provided by the present invention, the support structure used to support the inclined structure is constructed in the initial structure information, and the support structure includes a plurality of support plates parallel to the forming direction, the top ends of the support plates are supported on the inclined structure, adjacent There is a gap between the support plates, which indicates that the cavity is still capable of holding gas or liquid. Therefore, after the part is formed, not only does it not need to remove the supporting structure, but also, compared with the prior art, the part forming method provided by the present invention does not need to disassemble the inclined structure, and the forming equipment is used for direct forming, omitting the welding process, and further , can simplify the forming process of parts, shorten the forming cycle of parts, and improve the strength of parts.

In addition, compared with the support block in the prior art, the support structure provided by the present invention can save the amount of metal powder used and reduce the cost of forming parts.

In the second aspect, the present invention also provides a terminal device applied to a laser selective melting forming system with a forming device, including a processing module and a communication module. The processing module is provided with a storage medium storing the above part forming method, and the communication module is connected with the processing module for communicating with the forming equipment.

The beneficial effect of the terminal device provided by the second aspect is the same as that of the part forming method described in the first aspect, and will not be repeated here.

In the third aspect, the present invention also provides a selective laser melting forming system, including forming equipment and the terminal equipment described in the second aspect, the forming equipment and the terminal equipment are connected by communication, and the terminal equipment controls the forming equipment to process the formed parts.

The beneficial effect of the laser selective melting forming system provided by the third aspect is the same as that of the terminal equipment described in the second aspect, and will not be repeated here.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present invention, and constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention, and do not constitute improper limitations to the present invention. In the attached picture:

Fig. 1 is the structural representation of the part that the embodiment of the present invention provides;

Fig. 2 is the structural representation of the part with supporting structure after forming;

3 is a schematic flow chart of a part forming method provided by an embodiment of the present invention;

Fig. 4 is a control block diagram of the laser selective melting forming system provided by the embodiment of the present invention.

Reference signs:

110—processing module, 120—communication module, 200—forming equipment, 210—substrate,

300—heat treatment equipment, 410—inclined structure, 421—support plate, 4211—hollow hole,

430—powder cleaning channel.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

It should be noted that when an element is referred to as being “fixed” or “disposed on” another element, it may be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined. "Several" means one or more than one, unless otherwise clearly and specifically defined.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right" etc. are based on those shown in the accompanying drawings. Orientation or positional relationship is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connection, or integral connection; it may be mechanical connection or electrical connection; it may be direct connection or indirect connection through an intermediary, and it may be the internal communication of two elements or the interaction relationship between two elements. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

Laser selective melting forming (SLM for short) is based on the basic idea of rapid prototyping, adopts the additive manufacturing method of layer-by-layer cladding, slices and layers the three-dimensional model of the part according to a certain thickness, and then under the control of the numerical control system, passes through it with laser The galvanometer controls the molten metal powder, which is directly shaped into a part with a specific geometry. During the laser selective melting forming process, the metal powder is completely melted to produce metallurgical bonding. The formed parts have the characteristics of good compactness and high structure performance, and can form high-precision complex special-shaped metal parts.

With the maturity of laser selective melting forming technology, its application fields are becoming more and more extensive, and more and more parts that cannot be realized by traditional technology are manufactured by laser selective melting forming technology. And for parts with a cavity and an inclined structure with an angle of inclination less than 45°, the cavity is used to accommodate gas or liquid. In the prior art, in the process of manufacturing by selective laser melting and forming, it is generally adopted to add an integrated support block for the inclined structure, and then remove the added support block after forming. The general method is to split the inclined structure, add support blocks for the split inclined structure, respectively shape the split inclined structures, remove the support blocks of each split inclined structure, and then The disassembled inclined structures are then welded together.

When the above method is used to process parts with a cavity and an inclined structure whose inclination angle is less than 45°, not only the parts formed after welding are prone to deformation, but also the size and deformation amount are different, which is difficult to quantify. Moreover, the quality after welding is difficult to guarantee, and metallurgical defects such as pores and lack of fusion are easily produced, which will lead to scrapping of parts in severe cases. At the same time, the process is complicated and the forming cycle of parts is prolonged.

In order to solve the above-mentioned technical problems in the prior art, in the first aspect, the embodiment of the present invention provides a part forming method, which is applied to a laser selective melting forming system, and the laser selective melting forming system includes a forming device 200 . It should be noted that, for ease of understanding, the part forming method provided by the embodiment of the present invention will be described in detail by taking the forming of the part shown in FIG. 1 by using the selective laser melting forming system as an example. It should be noted that the part shown in Figure 1 has a cavity, the outer wall of the cavity is a tapered boss-like structure, and the angle range between the outer wall of the cavity and the forming direction is 45°<α<90°, That is, the range of the included angle between the outer wall of the cavity or the tangential extension direction of the outer wall and the horizontal plane is 0°<α<45°. The cavity can be used to contain gas or liquid.

As shown in Figure 3, the part forming method includes:

Step S100: Obtain the initial structure information of the part.

As a possible implementation, referring to FIG. 1 , the initial structure information of the part is a three-dimensional model of the part. According to the actual size information of the part, the 3D model of the part is constructed in the 3D software. The three-dimensional model of the part can observe the structure of the part more intuitively, and at the same time facilitate the subsequent processing and forming. In practical applications, the 3D software can be UG, ProE and other software capable of constructing 3D models of parts. Of course, the selection of 3D software should be selected according to the actual situation. Here, it is just an example and no specific limitation is made.

Step S200: Determine the forming direction of the part according to the initial structure information.

According to the structural characteristics of the part itself, the forming direction of the part is determined according to the initial structural information of the part. During specific implementation, the forming direction of the part is the direction of increasing height during deposition during the forming process. In the embodiment provided by the present invention, the substrate 210 can be used as the forming platform, the laser can be selected as the energy source, and the forming device 200 can be used to scan the surface of the substrate 210 layer by layer according to the forming direction of the part, and the upper surface of the substrate 210 horizontal setting. The scanned metal powder is melted and solidified to achieve the effect of metallurgical bonding, and finally a part that conforms to the three-dimensional model of the part is obtained. The selection of the forming direction of the part is based on the basic principles of stability, less support and short forming time. In the embodiment provided by the present invention, in practice, when forming, the upper surface of the substrate 210 is set horizontally, and the forming direction is perpendicular to the upper surface of the substrate 210, that is, the forming direction is along the vertical direction, as shown in FIG. 2 .

Step S300: Combining the forming direction and the initial structure information, determine the inclined structure 410 with a cavity of the part, and the angle α between the inclined structure 410 and the forming direction, 45°<α<90°.

As shown in FIG. 1 and FIG. 2 , after the forming direction of the part is determined, the inclined structure 410 with a cavity is judged along the forming direction. In the part provided by the embodiment of the present invention, as shown in FIG. 2 , the inclined structure 410 is a side wall of a tapered boss-like structure, and the inclined structure 410 has a cavity.

Step S400: Construct a supporting structure for supporting the inclined structure 410 in the initial structure information, and obtain processing structure information of the part. The support structure includes a plurality of support plates 421 parallel to the forming direction, the top ends of the support plates 421 are supported by the inclined structure, and there are gaps between adjacent support plates 421 .

This shows that the cavity is still capable of holding gas or liquid. Therefore, after the part is formed, not only does it not need to remove the support structure, but also, compared with the prior art, the part forming method provided by the embodiment of the present invention does not need to disassemble the inclined structure 410, and uses the forming equipment 200 to form directly, omitting welding The process, further, can simplify the forming process of the part, shorten the forming cycle of the part, and improve the strength of the part. In addition, compared with the supporting blocks in the prior art, the supporting structure provided by the present invention can save the amount of metal powder used and reduce the cost of forming parts.

The support structure is a grid-like support structure, and the support structure includes a plurality of support plates 421 parallel to the forming direction. After forming, the lower end of the support plate 421 is supported by the base plate 210, and the upper end of the support plate 421 is supported by the inner wall of the inclined structure 410 of the part. . The structure and size of the support plate 421 may be the same or different, depending on the relative position between the support plate 421 and the inclined structure 410 . For example, referring to FIG. 2 , it should be understood that the height of the support plate 421 away from the component axis is smaller than the height of the support plate 421 close to the component axis. The support plate 421 is used to enhance the stability of the part during the forming process and reduce the deformation of the part during the forming process. The plurality of support plates 421 may be arranged at intervals along the direction perpendicular to the forming direction. Of course, the plurality of support plates 421 may also be arranged at intervals along the circumferential direction of the part, which is not specifically limited here.

Step S500: According to the processing structure information, control the forming equipment 200 to process and shape the parts. In specific implementation, according to the processing structure information, the processing structure information of the part is sliced and layered, and then imported into the terminal device, and the terminal device controls the forming device 200 to process and shape the part to obtain a part with a supporting structure.

It should be noted that the processing structure information of the part includes the above-mentioned initial structure information and support structure information, that is, during the forming process of the part using the forming equipment 200, the built support structure is formed together with the initial structure of the part. In addition, the processing structure information of the part also includes the information of slicing and layering the part along the forming direction of the part, so that the part can be clad layer by layer according to the forming direction during forming.

Step S600: Subsequent processing, obtaining parts.

As a possible implementation, in step S600, the subsequent processing includes:

Step S600-1: Removing residual powder.

During specific implementation, after the part is formed and cooled for a certain period of time, the substrate 210 and the formed part are taken out. Then, compressed air and a vibrating platform can be used to clean the residual powder on the substrate 210 and the formed parts. Use compressed air to clean the powder on the surface of the substrate 210 and the formed part, and use a vibration platform to clean the remaining powder inside the substrate 210 and the formed part.

Step S600-2: performing heat treatment on the part processed and formed by controlling the forming equipment 200 according to the processing structure information.

In the case of adopting the above technical solution, the internal structure of the part can be optimized, and the mechanical properties of the part can be improved.

Subsequent processing also includes:

Step S600-3: separating the substrate 210 from the parts.

Step S600-4: Perform overall grinding, polishing, and sandblasting on the outer surface of the part.

As an alternative, in the embodiment provided by the present invention, the substrate 210 can be separated from the part by wire cutting, and then the outer surface of the part can be ground, polished, and sandblasting as needed to obtain the final part.

It can be seen from the above that the part forming method provided by the embodiment of the present invention is applied to the laser selective melting forming system with the forming device 200 . During specific implementation, in the processing and forming process of the part, the initial structure information of the part is first obtained, then the forming direction of the part is determined according to the initial structure information, and then the inclined structure 410 with a cavity of the part is determined in combination with the forming direction and the initial structure information, There is an included angle α between the inclined structure 410 and the forming direction, 45°<α<90°. Then, a support structure for supporting the inclined structure 410 is constructed in the initial structure information, so as to obtain the processing structure information of the part. Moreover, the support structure includes a plurality of support plates 421 parallel to the forming direction, the top ends of the support plates 421 are supported by the inclined structure, and there are gaps between adjacent support plates 421 . Afterwards, according to the processing structure information of the part, the forming equipment 200 is controlled to perform processing and forming of the part. After final processing, parts are obtained. In the part forming method provided by the present invention, the support structure used to support the inclined structure 410 is constructed in the initial structure information, and the support structure includes a support plate 421 parallel to the forming direction, and the top end of the support plate 421 is supported on the inclined structure. There is a gap between adjacent support plates 421, thereby indicating that the cavity is still capable of containing gas or liquid. Therefore, after the part is formed, not only does it not need to remove the supporting structure, but also, compared with the prior art, the part forming method provided by the present invention does not need to disassemble the inclined structure 410, and uses the forming equipment 200 to form it directly, omitting the welding process, Furthermore, the forming process of the part can be simplified, the forming cycle of the part can be shortened, and the strength of the part can be improved.

It should be noted that, in the forming method provided by the embodiment of the present invention, the angle α between the inclined structure 410 of the applicable part and the forming direction is not limited, 45°<α<90°, for example, α can be 50°, 60°, 75°, 80°, etc.

In a possible implementation manner, a hollow hole 4211 is opened on the support plate 421 . In this way, on the one hand, the weight of the parts can be reduced, the amount of metal powder used can be saved, and the processing cost can be reduced. On the other hand, when the cavity of the inclined structure 410 is used for accommodating liquid or gas, the capacity of the cavity can be enlarged to improve the fluidity of the contained liquid or gas. In practice, when the part shown in Figure 1 provided by the embodiment of the present invention has a bottom end, so that the cavity has only one opening, as shown in Figures 1 and 2, during specific implementation, the opening can be used to feed the cavity Injecting and discharging gas or liquid in the body, when using the part forming method provided by the embodiment of the present invention to form a part, the powder cleaning channel 430 communicating with the opening can be formed during the forming process, so as to facilitate subsequent cleaning of the powder in the cavity.

In some embodiments, the hollow hole 4211 is an elliptical hole, and the ratio of the long diameter of the elliptical hole to the short diameter of the elliptical hole is greater than 2:1. In this case, when the structure and size of the support plate 421 are fixed, the area of the hollow hole 4211 can be increased to the greatest extent, the weight of the parts can be reduced, and the amount of metal powder used can be saved. Moreover, as shown in FIG. 2 , the extending direction of the long diameter of the elliptical hole is parallel to the forming direction.

As an optional manner, the distance between two adjacent support plates 421 is the same. In this way, the uniformity of the parts can be improved and deformation of the parts can be avoided.

In one example, the width of the support plate 421 is 0.8 mm to 1.5 mm. Exemplarily, the width of the support plate 421 can be 0.8 mm, 0.9 mm, 1 mm, 1.2 mm, 1.3 mm, 1.5 mm, etc., here only An example is used for illustration without specific limitation. The spacing distance between two adjacent support plates 421 is 1.5 mm to 2.5 mm, for example, the spacing distance between two adjacent support plates 421 can be 1.5 mm, 1.6 mm, 1.8 mm, 2 mm, 2.2 mm , 2.5mm, etc., are just examples here, and are not specifically limited. They should be able to support during the forming process of the part, facilitate the forming of the inclined structure 410, and at the same time minimize the space occupied by the supporting structure.

In an optional manner, the connection between the support plate 421 and the inclined structure 410 is provided with rounded corners to reduce the stress between the support plate 421 and the parts, avoid cracking of the parts, and ensure the structural strength of the formed parts.

In the second aspect, the embodiment of the present invention also provides a terminal device, which is applied to a laser selective melting forming system with a forming device 200 , and the terminal device includes a processing module 110 and a communication module 120 . The processing module 110 is provided with a storage medium storing the above part forming method, and the communication module 120 is connected with the processing module 110 for communicating with the forming equipment 200 .

The beneficial effect of the terminal device provided by the second aspect is the same as that of the part forming method described in the first aspect, and will not be repeated here.

In the third aspect, the embodiment of the present invention also provides a selective laser melting forming system, including the forming equipment 200 and the terminal equipment described in the second aspect, the forming equipment 200 is connected to the terminal equipment in communication, and the terminal equipment controls the forming equipment 200 to process the formed parts .

During specific implementation, the laser selective melting forming system provided by the embodiment of the present invention also includes a heat treatment device 300, which is connected to a terminal device in communication, and the heat treatment device 300 can perform heat treatment on parts.

The forming equipment 200 and the heat treatment equipment 300 provided in the embodiment of the present invention are both communicatively connected to the processing module 110 through the communication module 120 of the terminal equipment. Communication connection mode in the embodiment of the present invention

Wireless communication or wired communication may be used. Wireless communication can be based on wifi, zigbee and other networking technologies 5 for communication. Wired communication can be based on data line or power line carrier for communication connection. The communication interface can be

As a standard communication interface. The standard communication interface can be a serial interface or a parallel interface. For example, the terminal equipment can communicate with the forming equipment 200 and the heat treatment equipment 300 by using the I2C (Inter-Integrated Circuit) bus, or by using the power line carrier communication technology.

The processing module 110 can be a processor or a controller, such as a central processing unit (Central0Processing Unit, CPU), a general-purpose processor, a digital signal processor (Digital SignalProcessor, DSP), an application-specific integrated circuit (Application-Specific Integrated Circuit, ASIC ), Field Programmable Gate Array (Field Programmable Gate Array, FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It can be realized or executed in combination with the present invention

The logical blocks, modules and circuits described in the open content. The processor can also be a combination that realizes computing functions, 5 for example including one or more microprocessor combinations, a combination of DSP and microprocessors, and the like. communication module 120

It can be a transceiver, a transceiver circuit, or a communication interface, etc. The storage medium may be a memory.

The beneficial effect of the laser selective melting forming system provided by the third aspect is the same as that of the terminal equipment described in the second aspect, and will not be repeated here.

Next, taking the forming of the part shown in Figure 1 by using the laser selective melting forming system as an example, the part forming method, terminal equipment and laser selective melting forming system provided by the embodiment of the present invention will be described in detail.

instruction of. Of course, this is just an example and not intended to be specifically limited.

As shown in Figure 1 to Figure 4, first establish the three-dimensional model of the part shown in Figure 1 in UG software, and determine the forming direction of the part. Combining the forming direction and the three-dimensional model of the part to determine the inclined structure 410 with a cavity of the part, and construct the support structure for supporting the inclined structure 410 in UG software, so as to obtain the processing structure information of the five parts. Then, export the model file such as STL format file, the three parts of the part will be exported

The Corner Tolerance and Adjacent Tolerance are both set to 0.0025. Then import the part model file such as STL format file into additive manufacturing auxiliary software such as Magics software, open the part file in STL format in Magics software, and use the repair wizard function to repair the part model without adding other auxiliary supports. Layer and slice parts with supporting structures along the part forming direction, and then import the above information into the storage medium in the processing module 110, and the processing module 110 controls the forming equipment 200 through the communication module 120, using the substrate 210 as the forming platform, along the Forming direction, cladding formed parts layer by layer. It should be noted that the substrate 210 belongs to the self-contained structure of the selective laser melting forming equipment 200 . After completion, the parts are taken out from the forming equipment 200, the residual powder is removed, and the parts are put into the heat treatment equipment 300. The processing module 110 of the terminal equipment controls the heat treatment equipment 300 through the communication module 120 to perform heat treatment on the parts. Finally, the substrate 210 is separated from the part by wire cutting, and the outer surface of the part is generally ground, polished, and sandblasted as required to obtain the final part.

The grid-like support structure does not need to be removed in the later stage, and its weight is controlled so that it can be formed integrally through the laser selective melting forming process without the need for welding procedures, saving costs and shortening the cycle, especially for mass-produced parts.

In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in an appropriate manner.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (10)

1. The part forming method is characterized by being applied to a selective laser melting forming system, wherein the selective laser melting forming system comprises forming equipment; the part forming method includes:

acquiring initial structure information of a part;

determining the forming direction of the part according to the initial structure information;

determining an inclined structure with a cavity of the part by combining the forming direction and the initial structure information, wherein an included angle alpha is formed between the inclined structure and the forming direction, and alpha is more than 45 degrees and less than 90 degrees;

constructing a supporting structure for supporting the inclined structure in the initial structure information, and obtaining the processing structure information of the part; wherein the support structure comprises a plurality of support plates parallel to the forming direction, the top ends of the support plates are supported on the inclined structure, and gaps are arranged between adjacent support plates;

controlling the forming equipment to perform machining forming on the part according to the machining structure information;

and carrying out subsequent processing to obtain the part.

2. The part forming method according to claim 1, wherein the initial structural information of the part is a three-dimensional model of the part.

3. The method as claimed in claim 1, wherein the support plate is perforated.

4. The part forming method of claim 3, wherein the hollowed-out holes are elliptical holes, and a ratio of a major diameter of the elliptical holes to a minor diameter of the elliptical holes is greater than 2:1.

5. The part forming method according to claim 1, wherein a spacing distance between adjacent two of the support plates is the same.

6. The part forming method according to claim 1, wherein the width of the support plate is 0.8mm to 1.5mm, and the spacing distance between adjacent two of the support plates is 1.5mm to 2.5mm.

7. The part forming method as claimed in claim 3, wherein a junction of the support plate and the inclined structure is provided with a rounded corner.

8. The part forming method according to claim 1, wherein the subsequent processing includes:

removing residual powder;

and carrying out heat treatment on the part which is processed and formed by controlling the forming equipment according to the processing structure information.

9. A terminal device for use in a selective laser melting system having a forming device, the terminal device comprising:

a process module provided with a storage medium storing the part forming method according to any one of claims 1 to 8;

and the communication module is connected with the processing module and is used for being in communication connection with the forming equipment.

10. A selective laser melting system, comprising:

the terminal device of claim 9;

and the terminal equipment is in communication connection with the terminal equipment, and controls the forming equipment to process and form the part.

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