Part and method of processing thereof

Abstract

This invention discloses a part and its processing method. The part processing method includes: establishing a 3D printed model including the part body and internal flow channels based on the part drawings, and designing 3D printing process bosses; planning the printing posture according to the part structure, designing the support structure, and obtaining the set additive manufacturing process parameters; using 3D printing technology to form the 3D printed model and process bosses in one step to obtain a part blank; removing the support structure of the part blank and performing airtightness testing on the internal flow channels; mounting the part blank onto the machine tool worktable in a zero-point positioning manner using the process bosses and a zero-point positioning device; performing layered processing on the outer surface of the part blank under the zero-point positioning reference to process the part blank to the specified dimensions; performing dimensional and geometric tolerance testing on the part, and removing the process bosses after the test results are qualified to complete the part processing. This invention can improve the manufacturing efficiency, accuracy, and reliability of complex parts with internal flow channels.

Description

Technical Field

[0001] This invention relates to the field of machining technology, and in particular to a part and its machining method. Background Technology

[0002] Irregularly shaped parts with internal flow channels are widely used in aerospace, precision instruments, and mold manufacturing. These parts have complex three-dimensional channel structures inside. If traditional cutting processes are used, they often need to be processed in sections and assembled by welding or assembly. This not only makes the process cumbersome and inefficient, but also easily causes problems such as stress concentration, poor sealing, and accumulation of dimensional errors. In other words, irregularly shaped parts with internal flow channels are difficult to form using traditional machining methods.

[0003] In recent years, the development of metal 3D printing technology has enabled the one-time molding of such complex structures, significantly breaking through the limitations of traditional processes. However, since additively manufactured parts generally have defects such as high surface roughness and limited dimensional accuracy, they still need to be further precision-machined using CNC machine tools to meet assembly and service requirements.

[0004] However, parts processed by metal 3D printing technology suffer from low processing efficiency and unstable accuracy due to difficulties in clamping and positioning. Summary of the Invention

[0005] This invention provides a part and its processing method to improve the manufacturing efficiency, precision and reliability of parts containing flow channels.

[0006] According to one aspect of the present invention, a method for machining a part is provided, the part being an irregularly shaped and complex part, the part comprising a part body and internal flow channels; the method includes: During the modeling stage, a 3D printing model including the part body and the internal flow channels is established based on the part drawings, and 3D printing process bosses are designed on the non-functional surfaces of the part body; wherein, the non-functional surfaces are the outer surfaces of the part body that do not require mating with other parts, and the process bosses are structures that can ensure that the part can be processed on all surfaces in one clamping. Based on the structure of the 3D printing model and the process boss, the printing posture is planned, the support structure is designed, and the set additive manufacturing process parameters are obtained. The 3D printing model and the process boss are formed in one step using 3D printing technology to obtain a part blank; Remove the support structure from the part blank and perform an airtightness test on the internal flow channel; The part blank is mounted onto the machine tool worktable by means of the process boss and the zero-point positioning device, and a machining datum consistent with the machine tool worktable is established based on the zero-point positioning datum. Under the zero-point positioning reference, the outer surface of the part blank is processed in layers to remove the machining allowance on the outer surface of the part body, and the part blank is processed to the specified size to obtain the part that meets the preset requirements; The part is inspected for dimensions and geometric tolerances according to the requirements of the part drawing. After the inspection results are qualified, the process boss is removed to complete the machining of the part.

[0007] Optionally, the part processing method further includes: during the modeling stage, reserving a 1-3mm machining allowance on the outer surface of the zero-point body, and establishing a one-to-one correspondence datum system with the coordinates of the machine tool worktable; or, During the modeling phase, the zero-point body reserves machining allowance based on the tolerance characteristics of the part, and establishes a one-to-one correspondence datum system with the coordinates of the machine tool worktable.

[0008] Optionally, under the zero-point positioning reference, the outer surface of the part blank is subjected to layered machining, including: Under the zero-point positioning reference, the part blank is clamped once and then subjected to roughing, semi-finishing and finishing of a five-axis linkage machining center to achieve layered processing of the outer surface of the part blank; Rough machining involves removing the machining allowance on the outer surface of the part to a thickness allowance of 0.3-0.5 mm.

[0009] Optionally, a separation groove is provided between the process boss and the part body; Removing the process boss to complete the machining of the part includes: The process boss is removed by wire cutting, the separation surface is deburred and trimmed, and the surface of the part is treated according to preset requirements to complete the processing of the part. The process boss has a structure that is a combination of at least two of the following: cylindrical, cuboid, cross, dovetail, and double boss; the axis of the process boss is aligned with the main axis of the machine tool worktable.

[0010] Optionally, the support structure is a tree structure, a point column structure, or a grid structure.

[0011] Optionally, printing posture planning is performed based on the structure of the 3D printing model and the process boss, including: Based on the structure of the 3D printing model and the process boss, printing posture planning is carried out with the goal of reducing internal support and overhang of the part body.

[0012] Optionally, the 3D printed model and the process boss are made of aluminum alloy, stainless steel or titanium alloy; After using 3D printing technology to form the 3D printed model and the process boss in one step to obtain a part blank, the process further includes: Stress relief is performed on the part blank.

[0013] Optionally, removing the support structure from the part blank and performing an airtightness test on the internal flow channel includes: The supporting structure of the part blank is removed by a combination of at least two of the following methods: mechanical cutting, vibration cleaning, vacuum adsorption, and air blowing. The internal flow channels are cleaned by purging with compressed air; The airtightness of the internal flow channel is tested using either the air pressure holding method or the liquid leakage method.

[0014] Optionally, the connection between the process boss and the zero-point positioning device can be any one of a pull stud, a tapered shank, a toothed clamp, or a ball lock structure. The zero-point positioning device is fixed to the upper surface of the machine tool worktable by bolts or positioning blocks.

[0015] According to another aspect of the present invention, a part is provided, which is manufactured by the part processing method provided in any embodiment of the present invention; The component includes: a component body and an internal flow channel; During the machining of the part, the part body is clamped by the process boss and the zero-point positioning device, and the part is installed on the machine tool table in a zero-point positioning manner. A machining datum consistent with the machine tool table is established based on the zero-point positioning datum. Alternatively, the part body is connected to the zero-point positioning device by the process boss and the fixture, and the part is then installed on the machine tool table in a zero-point positioning manner. A machining datum consistent with the machine tool table is established based on the zero-point positioning datum. The clamp and the zero-point positioning device are connected by a pull stud, ball lock or conical shank interface to form an integrated connection for positioning, anti-rotation and locking. After clamping, the repeatability of the zero-point positioning device is ≤0.005mm.

[0016] The technical solution of this invention, by setting 3D printing process bosses on the non-functional surfaces of the part body, and by setting process bosses, ensures that the part can be processed on all surfaces in one clamping. In the 3D printing stage, the part body, internal flow channels and process bosses can be formed in one step. The process bosses and zero-point positioning devices are used to complete the cutting and finishing of all surfaces in one clamping of the part. This enables rapid clamping of the part, shortens the processing cycle, and can significantly improve the manufacturing efficiency, accuracy and reliability of irregular parts containing flow channels.

[0017] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A flowchart of a part processing method provided in an embodiment of the present invention; Figure 2 A flowchart of another part processing method provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of a part clamping and positioning structure provided in an embodiment of the present invention. Detailed Implementation

[0020] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0021] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and their variations, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0022] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0023] It should be noted that the structures, proportions, sizes, etc., drawn in the accompanying drawings of this specification are only used to complement the content disclosed in the specification, so as to enable those skilled in the art to understand and read them, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modification to the structure, change in the proportions, or adjustment of the size, without affecting the effects and objectives that the present invention can produce, should fall within the scope of the technical content disclosed in the present invention.

[0024] Research indicates that new technical challenges remain when using 3D technology for CNC machining of irregularly shaped parts: First, the parts have complex shapes and lack a unified reference surface, making positioning and clamping difficult; second, the machining process often requires multiple flipping and repeated clamping, easily leading to accumulated positioning errors; third, the narrow local machining area results in tool interference and poor cutting stability, increasing the difficulty of process planning and implementation. Therefore, the precision machining of irregularly shaped parts containing internal flow channels has become a critical technological bottleneck that urgently needs to be overcome.

[0025] To address the above problems, embodiments of the present invention provide a part processing method. Figure 1 This is a flowchart illustrating a part processing method provided in an embodiment of the present invention. This method is applicable to complex, irregularly shaped parts, which include a part body and internal flow channels. The part can be an aerospace component, a gas turbine component, or a complex mold cooling channel component. Specifically, the part processing method can be a CNC machining method. This method is applicable to the processing of aerospace components, gas turbine components, and complex mold cooling channel components, and is suitable for small-batch, high-complexity customized manufacturing scenarios.

[0026] See Figure 1 The parts processing methods include: S100. In the modeling stage, a 3D printing model including the part body and internal flow channels is established based on the part drawings, and 3D printing process bosses are designed on the non-functional surfaces of the part body.

[0027] Non-functional surfaces are the outer surfaces of a part that do not require mating with other parts. Conversely, functional surfaces are the outer surfaces of a part that directly contact other components, performing a predetermined function or providing mating. Process bosses are structures that ensure all surfaces of a part are machined in a single clamping operation.

[0028] The modeling stage can be specifically understood as the 3D modeling stage. The part drawings are based on traditional two-dimensional engineering drawings or three-dimensional design models to ensure that the final 3D printed model meets the original design requirements in terms of size, tolerance and performance.

[0029] Specifically, due to the complex shape of the parts and the fact that their machining typically requires multiple flipping and repeated clamping, the lack of a unified reference surface makes positioning and clamping extremely difficult and easily leads to the accumulation of positioning errors. By setting process bosses, which ensure that all surfaces of the part are cut and finished in a single clamping operation, subsequent machining of the part can be performed quickly without the accumulation of positioning errors. Furthermore, by placing the process bosses on the non-functional surfaces of the part body, the surface quality and dimensional accuracy of the functional surfaces of the part remain unaffected.

[0030] S200: Based on the structure of the 3D printing model and the process boss, plan the printing posture, design the support structure, and obtain the set additive manufacturing process parameters.

[0031] Specifically, based on the structure of the 3D printed model and the process boss, and with the goal of reducing internal cavity supports and overhangs within the part body, the printing posture is planned. The support structure is designed to facilitate removal. The polarity of the additive manufacturing process parameters for the 3D printed model is selected based on its intended functions and application scenarios. Furthermore, to reduce process steps, the additive manufacturing process parameters for the process boss are kept consistent with those of the 3D printed model.

[0032] S300 uses 3D printing technology to form a 3D printed model and process boss in one step to obtain a part blank.

[0033] Specifically, 3D printing technology includes metal laser powder bed melting technology or metal additive manufacturing technology.

[0034] Specifically, additive manufacturing methods such as metal laser powder bed melting technology are used to form the part body and internal flow channels, i.e., process bosses, in one step.

[0035] S400: Remove the support structure of the part blank and perform an airtightness test on the internal flow channel.

[0036] Specifically, the supporting structure in the part blank is removed to ensure that the internal flow channels are completely unobstructed. After cleaning the internal flow channels, compressed air can be used to purge them to ensure that there are no blockages. After completing the above operations, the airtightness of the internal flow channels can be tested by pressurizing compressed air or by liquid leakage to ensure that there are no leaks in the internal flow channels.

[0037] S500: The part blank is mounted on the machine tool worktable in a zero-point positioning manner by means of process boss and zero-point positioning device, and a machining datum consistent with the machine tool worktable is established based on the zero-point positioning datum.

[0038] Specifically, the pre-reserved process bosses on the part body can serve as clamping carriers. Combined with the zero-point positioning device on the machine tool table, the part blank can be precisely mounted onto the machine tool table in one go. Furthermore, a machining datum consistent with the machine tool table is established based on the zero-point positioning reference, preventing the accumulation of positioning errors in subsequent machining processes. This provides a stable and accurate positioning foundation for the subsequent precision machining of the part's critical functional surfaces. In other words, the combination of the process bosses and the zero-point positioning device enables precise positioning and reliable clamping of the part, achieving rapid positioning and high repeatability.

[0039] S600. Under the zero-point positioning reference, the outer surface of the part blank is processed in layers to remove the machining allowance of the outer surface of the part body, and the part blank is processed to the specified size to obtain a part that meets the preset requirements.

[0040] Specifically, a five-axis linkage machining center can be used to perform layered machining of the outer surface of the part blank under the zero-point positioning reference, completing the rough, semi-finish and finish machining sequence. The machining allowance of the outer surface of the part body is removed, and the part is machined to the size required by the part drawing to obtain a part that meets the preset requirements.

[0041] S700. Perform dimensional and geometric tolerance checks on the parts according to the requirements of the part drawings, and remove the process bosses after the inspection results are qualified to complete the machining of the parts.

[0042] Specifically, when the part meets the preset requirements, the process boss is removed, and the separation surface between the part body and the process boss is deburred and trimmed. The outer surface of the part body is then surface-treated according to the preset requirements to finally obtain a finished part that meets the design requirements.

[0043] The technical solution of this invention, by setting 3D printing process bosses on the non-functional surfaces of the part body, and by setting process bosses, ensures that the part can be processed on all surfaces in one clamping. In the 3D printing stage, the part body, internal flow channels and process bosses can be formed in one step. The process bosses and zero-point positioning devices are used to complete the cutting and finishing of all surfaces in one clamping of the part. This enables rapid clamping of the part, shortens the processing cycle, and can significantly improve the manufacturing efficiency, accuracy and reliability of irregular parts containing flow channels.

[0044] Based on the above embodiments, in one embodiment, the part machining method may optionally further include: during the modeling stage, reserving a machining allowance of 1-3mm on the outer surface of the zero-point body, and establishing a one-to-one correspondence datum system with the machine tool table coordinates. This is applicable to situations where the tolerance characteristics of the part are not very strict, and designers can set the reserved machining allowance based on practical experience, which can simplify the modeling process.

[0045] Based on the above embodiments, in another embodiment, the part machining method may optionally further include: during the modeling stage, the zero-point body reserves machining allowance according to the tolerance characteristics of the part, and establishes a one-to-one correspondence datum system with the machine tool table coordinates. This is suitable for situations where the part tolerances are very strict and can guarantee the machining accuracy of the part.

[0046] By setting the mapping relationship between the part body and the machine tool table coordinates during the modeling stage, coordinate transformation is not required during the subsequent clamping process, which can shorten the clamping time.

[0047] Based on the above embodiments, optionally, under the zero-point positioning reference, the outer surface of the part blank is processed in layers, including: Under the zero-point positioning reference, the part blank is clamped once and then subjected to roughing, semi-finishing and finishing by a five-axis linkage machining center to achieve layered machining of the outer surface of the part blank; among them, roughing is to remove the machining allowance of the outer surface of the part to a uniform thickness allowance of 0.3-0.5mm.

[0048] Based on the above embodiments, optionally, a separation groove is reserved between the process boss and the part body; the separation groove can be used for subsequent process bosses to be cut off from the part body, reducing the impact on the part structure.

[0049] Therefore, removing the process bosses to complete the machining of the part includes: The process bosses are removed by wire cutting, and the separation surface is deburred and trimmed. The surface treatment of the parts is then performed according to the preset requirements to complete the part processing.

[0050] Specifically, when removing process bosses using wire EDM, the process should be carried out along the pre-set separation groove or weak connection position to avoid damaging the part body.

[0051] Based on the above embodiments, optionally, the structure of the process boss is a combination of at least two of the following: cylindrical, cuboid, cross, dovetail, and double boss.

[0052] Based on the above embodiments, optionally, the process boss can be set as a hollow structure, which can reduce the weight of auxiliary parts, reduce material consumption, and save costs.

[0053] Based on the above embodiments, optionally, the axis of the process boss is aligned with the main axis of the machine tool table in order to establish a stable clamping reference.

[0054] Based on the above embodiments, the support structure may optionally be a tree structure, a point column structure, or a grid structure, so as to support the laid powder material through the support structure.

[0055] Based on the above embodiments, optionally, printing posture planning is performed according to the structure of the 3D printing model and the process boss, including: Based on the structure of the 3D printing model and the process boss, the printing posture is planned with the goal of reducing the internal support and overhang of the part body.

[0056] Based on the above embodiments, optionally, the connection method between the process boss and the zero-point positioning device can be any one of a pull stud, tapered shank, clamping tooth, or ball lock structure. The zero-point positioning device is fixed to the upper surface of the machine tool worktable by bolts or positioning blocks.

[0057] Figure 2 A flowchart of another part processing method provided in an embodiment of the present invention can be found here. Figure 2 Based on the above embodiments, optionally, the materials for the 3D printed model and the process boss are aluminum alloy, stainless steel, or titanium alloy. The part processing method includes: S201. In the modeling stage, a 3D printing model including the part body and internal flow channels is established based on the part drawings, and 3D printing process bosses are designed on the non-functional surfaces of the part body.

[0058] S202. Based on the structure of the 3D printing model and the process boss, plan the printing posture, design the support structure, and obtain the set additive manufacturing process parameters.

[0059] S203. Use 3D printing technology to form a 3D printed model and process boss in one step to obtain a part blank.

[0060] S204. Stress relief is performed on the part blank.

[0061] Specifically, stress relief heat treatment is performed after metal additive manufacturing is completed to reduce residual stress.

[0062] S205. Remove the supporting structure of the part blank by means of at least two of the following methods: mechanical cutting, vibration cleaning, vacuum adsorption and air blowing.

[0063] S206. The internal flow channels are cleaned by purging with compressed air.

[0064] S207. Use the air pressure holding method or the liquid leakage method to test the air tightness of the internal flow channel.

[0065] S208. The part blank is installed on the machine tool worktable by means of process boss and zero-point positioning device in a zero-point positioning manner, and a machining datum consistent with the machine tool worktable is established based on the zero-point positioning datum.

[0066] S209. Under the zero-point positioning reference, perform layered processing on the outer surface of the part blank, remove the machining allowance on the outer surface of the part body, process the part blank to the specified size, and obtain a part that meets the preset requirements.

[0067] S210. Perform dimensional and geometric tolerance checks on the parts according to the requirements of the part drawings, and remove the process bosses after the inspection results are qualified to complete the machining of the parts.

[0068] The present invention also provides a part, which is manufactured by the part processing method provided in any of the above embodiments, and therefore, the part has corresponding beneficial effects.

[0069] Figure 3 This is a schematic diagram of a part clamping and positioning structure provided in an embodiment of the present invention, wherein the part is processed by the part processing method provided in any of the above embodiments.

[0070] See Figure 3 The components include: the component body 100 and the internal flow channel.

[0071] During the machining process of the part, the part body 100 is clamped by the process boss 101 and the zero-point positioning device 103, and the part is installed on the machine tool table 104 in a zero-point positioning manner. A machining datum consistent with the machine tool table 104 is established based on the zero-point positioning datum. Alternatively, the part body 100 is connected to the zero-point positioning device 103 by the process boss 101 and the fixture 102, and the part is then installed on the machine tool table 104 in a zero-point positioning manner. A machining datum consistent with the machine tool table 104 is established based on the zero-point positioning datum. Figure 3 The example shown illustrates a case where the part body 100 is connected to the zero-point positioning device 103 via the process boss 101 and the fixture 102, but this is not intended to limit the invention.

[0072] The clamp 102 and the zero-point positioning device 103 are connected by a pull stud, ball lock, or conical shank interface to form an integrated connection for positioning, anti-rotation, and locking. After clamping, the repeatability of the zero-point positioning device 103 is ≤0.005mm. The clamp 102 may include a vise, etc.

[0073] Optionally, the process boss 101 is matched with the positioning, anti-rotation and locking interface of the zero-point positioning device 103.

[0074] Specifically, the part body 100, process boss 101, fixture 102, zero-point positioning device 103, and machine tool table are arranged along a first direction Y, which is the height extension direction of the machine tool table. The part body 100 is supported and positioned by the zero-point positioning device 103 and fixture 102. The zero-point positioning device 103 is fixedly connected to the machine tool table 104 by bolts or positioning blocks. Its positioning surface and locking mechanism are located on the upper surface of the machine tool table 104. The machine tool table 104 provides the overall support and motion reference.

[0075] See Figure 3 The part body 100 includes a first side and a second side along the first direction Y, and the process boss 101 may be located on the second side (lower part) of the part body 100. In other embodiments, the part body 100 may also include a third side and a fourth side along the second direction X, and the process boss 101 may be located on the third side (side) or the fourth side (side) of the part body 100. Wherein, the second direction X is perpendicular to the first direction Y.

[0076] It is understandable that the internal flow channel is located inside the zero-point body 100. Figure 3 The diagram is simplified or omitted, and its fluency is ensured by the powder removal and airtightness test in step S400 or steps S205-S207.

[0077] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0078] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A method for machining a part, characterized in that, The part is an irregularly shaped, complex component, comprising a part body and internal flow channels; the method includes: During the modeling stage, a 3D printing model including the part body and the internal flow channels is established based on the part drawings, and 3D printing process bosses are designed on the non-functional surfaces of the part body; wherein, the non-functional surfaces are the outer surfaces of the part body that do not require mating with other parts, and the process bosses are structures that can ensure that the part can be processed on all surfaces in one clamping. Based on the structure of the 3D printing model and the process boss, the printing posture is planned, the support structure is designed, and the set additive manufacturing process parameters are obtained. The 3D printing model and the process boss are formed in one step using 3D printing technology to obtain a part blank; Remove the support structure from the part blank and perform an airtightness test on the internal flow channel; The part blank is mounted onto the machine tool worktable by means of the process boss and the zero-point positioning device, and a machining datum consistent with the machine tool worktable is established based on the zero-point positioning datum. Under the zero-point positioning reference, the outer surface of the part blank is processed in layers to remove the machining allowance on the outer surface of the part body, and the part blank is processed to the specified size to obtain the part that meets the preset requirements; The part is inspected for dimensions and geometric tolerances according to the requirements of the part drawing. After the inspection results are qualified, the process boss is removed to complete the machining of the part.

2. The part processing method according to claim 1, characterized in that, Also includes: During the modeling stage, a machining allowance of 1-3mm is reserved on the outer surface of the zero point body, and a reference system corresponding one-to-one with the coordinates of the machine tool worktable is established. or, During the modeling phase, the zero-point body reserves machining allowance based on the tolerance characteristics of the part, and establishes a one-to-one correspondence datum system with the coordinates of the machine tool worktable.

3. The part processing method according to claim 2, characterized in that, Under the zero-point positioning reference, the outer surface of the part blank is processed in layers, including: Under the zero-point positioning reference, the part blank is clamped once and then subjected to roughing, semi-finishing and finishing of a five-axis linkage machining center to achieve layered processing of the outer surface of the part blank; Rough machining involves removing the machining allowance on the outer surface of the part to a thickness allowance of 0.3-0.5 mm.

4. The part processing method according to claim 1, characterized in that, A separation groove is reserved between the process boss and the part body; Removing the process boss to complete the machining of the part includes: The process boss is removed by wire cutting, the separation surface is deburred and trimmed, and the surface of the part is treated according to preset requirements to complete the processing of the part. The process boss has a structure that is a combination of at least two of the following: cylindrical, cuboid, cross, dovetail, and double boss; the axis of the process boss is aligned with the main axis of the machine tool worktable.

5. The part processing method according to claim 1, characterized in that, The supporting structure can be a tree structure, a point column structure, or a grid structure.

6. The part processing method according to claim 1, characterized in that, Based on the structure of the 3D printing model and the process boss, printing posture planning is performed, including: Based on the structure of the 3D printing model and the process boss, printing posture planning is carried out with the goal of reducing internal support and overhang of the part body.

7. The part processing method according to claim 1, characterized in that, The 3D printed model and the process boss are made of aluminum alloy, stainless steel or titanium alloy. After using 3D printing technology to form the 3D printed model and the process boss in one step to obtain a part blank, the process further includes: Stress relief is performed on the part blank.

8. The part processing method according to claim 1, characterized in that, Removing the support structure from the part blank and performing an airtightness test on the internal flow channel includes: The supporting structure of the part blank is removed by a combination of at least two of the following methods: mechanical cutting, vibration cleaning, vacuum adsorption, and air blowing. The internal flow channels are cleaned by purging with compressed air; The airtightness of the internal flow channel is tested using either the air pressure holding method or the liquid leakage method.

9. The part processing method according to claim 1, characterized in that, The connection between the process boss and the zero-point positioning device is any one of the following: pull stud, tapered shank, clamping tooth or ball lock structure. The zero-point positioning device is fixed to the upper surface of the machine tool worktable by bolts or positioning blocks.

10. A component, characterized in that, The part is manufactured by the part processing method described in any one of claims 1-9; The component includes: a component body and an internal flow channel; During the machining of the part, the part body is clamped by the process boss and the zero-point positioning device, and the part is installed on the machine tool table in a zero-point positioning manner. A machining datum consistent with the machine tool table is established based on the zero-point positioning datum. Alternatively, the part body is connected to the zero-point positioning device by the process boss and the fixture, and the part is then installed on the machine tool table in a zero-point positioning manner. A machining datum consistent with the machine tool table is established based on the zero-point positioning datum. The clamp and the zero-point positioning device are connected by a pull stud, ball lock or conical shank interface to form an integrated connection for positioning, anti-rotation and locking. After clamping, the repeatability of the zero-point positioning device is ≤0.005mm.

Images