Additive method, device and equipment for reverse hard lattice structure and medium

Abstract

The invention provides an inverse hard dot matrix structure material adding method, device, equipment and medium, and the method comprises the steps that an inverse hard dot matrix structure is obtained, a three-dimensional image of the inverse hard dot matrix structure is obtained, a linear area and an arc area corresponding to gaps of the inverse hard dot matrix structure are determined based on the three-dimensional image, and the linear area and the arc area correspond to the gaps of the inverse hard dot matrix structure; determining a first additive path of the straight line area and a second additive path of the arc line area, and determining and obtaining multi-dimensional welding parameters based on the first additive path and the second additive path; and based on the first material adding path of the straight line area and the second material adding path of the arc line area, material adding is conducted on the inverse hard lattice structure gap. According to the method, the high forming bonding rate and the high interface shear strength are achieved, so that the filling metallurgical bonding degree is improved, and the reinforcing and strengthening effect on the hard joint is also enhanced.

Description

Technical Field

[0001] This application relates to the field of electric arc additive technology, and more specifically, to a method, apparatus, equipment, and medium for additive manufacturing of inverse hard lattice structures. Background Technology

[0002] Inverse lattice structures are common in practical engineering applications. Hard alloys, steel-bonded hard alloys, or cermets are bonded to the substrate using methods such as brazing, spot welding, inlay casting, interference fit, and weld overlay. Some columns need to extend into the substrate, while others protrude, forming lattice nodes on the structural surface. The filling of materials at locations other than the nodes within this type of lattice structure framework involves exploring and applying various filling methods.

[0003] Currently, in this type of lattice structure framework, the material filling method for other positions besides the nodes is to fill the gaps formed by welding between the studs, such as linear (one-line) filling, which is specifically carried out by the existing additive manufacturing system after path planning.

[0004] However, since the stud joints are usually irregular in shape, their reinforcement effect on hard joints is relatively general, and the metallurgical bonding degree of the filling is limited. Summary of the Invention

[0005] In view of this, the purpose of this application is to provide an additive manufacturing method, apparatus, equipment and medium for inverse hard lattice structures. By using a first additive manufacturing path in a straight area and a second additive manufacturing path in an arc area under determined multi-dimensional welding parameters, additive manufacturing is performed on the gaps of the inverse hard lattice structure, achieving a high forming bonding rate and interfacial shear strength, thereby improving the filling metallurgical bonding degree and enhancing the reinforcement effect on hard nodes.

[0006] In a first aspect, embodiments of this application provide an additive manufacturing method for an inverse hard lattice structure, the method comprising: Obtain the inverse hard lattice structure and obtain a three-dimensional image of the inverse hard lattice structure. Based on the three-dimensional image, determine the straight line region and the arc region corresponding to the gap of the inverse hard lattice structure, and determine the first additive path of the straight line region and the second additive path of the arc region. Based on the first additive manufacturing path and the second additive manufacturing path, multi-dimensional welding parameters are determined and obtained; wherein, the multi-dimensional welding parameters include welding speed; Under the multi-dimensional welding parameters, additive manufacturing is performed on the gaps of the inverse hard lattice structure based on the first additive path in the straight region and the second additive path in the arc region.

[0007] In one possible implementation, the additive path represents the walking path and the oscillation pattern; determining the first additive path for the straight region and the second additive path for the curved region includes: Determine the first walking path and the first swing mode of the straight line area; wherein, the first walking path is a straight line, the first swing mode is a zigzag swing, and the first swing mode has a preset swing width; Determine the second walking path and the second swing mode of the arc region; wherein the second walking path and the second swing mode together constitute a reciprocating back-and-forth zigzag swing.

[0008] In one possible implementation, the method further includes: For the gaps in the inverse hard lattice structure, the arc-shaped overlap and cross-shaped intersection of the gaps in the inverse hard lattice structure are determined; Determine the welding speed at the cross intersection, and determine the target welding speed at the arc overlap based on the welding speed at the cross intersection; wherein, the target welding speed at the arc overlap is a target multiple of the welding speed at the cross intersection; In response to additive manufacturing of the gap in the inverse hard lattice structure, the welding speed at the arc-shaped overlap is adjusted to the target welding speed. In one possible implementation, the method further includes: Determine the lateral overlap of the gaps in the inverse hard lattice structure; wherein, the lateral overlap represents the lateral overlap corresponding to the first additive path; In response to additive manufacturing of the gap in the inverse hard lattice structure based on a first additive path in the straight region and a second additive path in the arc region, the welding speed is adjusted at the arc-directional overlap and the transverse overlap; wherein the arc-directional overlap characterizes the arc-directional overlap of the inverse hard lattice structure. In one possible implementation, the inverse hard lattice structure corresponds to a base material matrix and additive metal, and the inverse hard lattice structure, the base material matrix, and the additive metal correspond to multiple metals; the additive manufacturing of the gaps in the inverse hard lattice structure corresponds to the path filling width and the path shortening distance; the method further includes: When adding material to the gaps in the inverse hard lattice structure, the path filling width is controlled and adjusted to the target path filling width, and the path shortening distance is adjusted to the target path shortening distance. Based on the target path filling width and the target path shortening distance, the target forming bonding rate and target interface shear strength at the interfaces of various metals corresponding to the additive matrix are obtained. The target grain average intercept of the parent matrix after additive manufacturing is obtained based on the target path fill width and the target path shortening distance; wherein the target grain average intercept and the basic grain average intercept of the parent matrix before additive manufacturing are within a preset grain average intercept difference range.

[0009] In one possible implementation, the method further includes: Determine the arc-side gap and the flat-side gap in the gap of the inverse hard lattice structure; wherein the arc-side gap corresponds to the arc region and the flat-side gap corresponds to the straight region; Control the path filling width in both the arc-side gap and the flat-side gap to the target path filling width, and the path shortening distance to the target path shortening distance.

[0010] In one possible implementation, the method further includes: Determine the distance between the heat source in the additive manufacturing process and the heat source lattice of the inverse hard lattice structure; The distance between the heat source array points is adjusted based on the path filling width and path shortening distance in both the arc-side gap and the flat-side gap directions.

[0011] Secondly, embodiments of this application also provide an additive manufacturing apparatus for inverse hard lattice structures, the apparatus comprising: The first acquisition module acquires the inverse hard lattice structure and acquires a three-dimensional image of the inverse hard lattice structure. Based on the three-dimensional image, it determines the straight line region and the arc region corresponding to the gap in the inverse hard lattice structure, and determines the first additive path for the straight line region and the second additive path for the arc region. The first determining module is used to determine multi-dimensional welding parameters based on the first additive manufacturing path and the second additive manufacturing path; wherein the multi-dimensional welding parameters include welding speed. The first additive manufacturing module is used to perform additive manufacturing on the gap of the inverse hard lattice structure based on the first additive manufacturing path in the straight line region and the second additive manufacturing path in the arc region under the multi-dimensional welding parameters.

[0012] In one possible implementation, the additive path represents the walking path and the oscillation pattern; the first determining module is specifically used for: Determine the first walking path and the first swing mode of the straight line area; wherein, the first walking path is a straight line, the first swing mode is a zigzag swing, and the first swing mode has a preset swing width; Determine the second walking path and the second swing mode of the arc region; wherein the second walking path and the second swing mode together constitute a reciprocating back-and-forth zigzag swing.

[0013] In one possible implementation, the inverse hard lattice structure additive manufacturing apparatus includes: The second determining module is used to determine the arc-shaped overlapping points and cross-shaped intersection points of the inverse hard lattice structure gaps. The third determining module is used to determine the welding speed at the cross intersection and to determine the target welding speed at the arc overlap based on the welding speed at the cross intersection; wherein the target welding speed at the arc overlap is a target multiple of the welding speed at the cross intersection; The first adjustment module is used to adjust the welding speed at the arc-shaped overlap to the target welding speed in response to additive manufacturing of the gap in the inverse hard lattice structure. In one possible implementation, the inverse hard lattice structure additive manufacturing apparatus includes: The fourth determining module is used to determine the lateral overlap of the gaps in the inverse hard lattice structure; wherein the lateral overlap represents the lateral overlap corresponding to the first additive path; The second adjustment module is used to adjust the welding speed at the arc-shaped overlap and the transverse overlap in response to additive manufacturing of the gap in the inverse hard lattice structure based on the first additive path in the straight region and the second additive path in the arc region; wherein the arc-shaped overlap represents the arc-shaped overlap of the inverse hard lattice structure. In one possible implementation, the inverse hard lattice structure corresponds to a base material matrix and an additive metal, and the inverse hard lattice structure, the base material matrix, and the additive metal correspond to multiple metals; the additive manufacturing of the gaps in the inverse hard lattice structure corresponds to the path filling width and the path shortening distance; the inverse hard lattice structure additive manufacturing device includes: The fourth determining module is used to control and adjust the path filling width to the target path filling width and the path shortening distance to the target path shortening distance when additive manufacturing is performed on the gaps of the inverse hard lattice structure. The second acquisition module is used to acquire the target forming bonding rate and target interface shear strength at the interface of the various metals corresponding to the additive matrix based on the target path filling width and the target path shortening distance. The third acquisition module is used to acquire the target grain average intercept of the parent material matrix after additive manufacturing based on the target path fill width and the target path shortening distance; wherein the target grain average intercept and the basic grain average intercept of the parent material matrix before additive manufacturing are within a preset grain average intercept difference range.

[0014] In one possible implementation, the inverse hard lattice structure additive manufacturing apparatus includes: The fifth determining module is used to determine the arc-side gap and the flat-side gap in the gap of the inverse hard lattice structure; wherein the arc-side gap corresponds to the arc region and the flat-side gap corresponds to the straight region; The control module is used to control the path filling width in both the arc-side gap and the flat-side gap to the target path filling width and the path shortening distance to the target path shortening distance.

[0015] In one possible implementation, the inverse hard lattice structure additive manufacturing apparatus includes: The sixth determining module is used to determine the distance between the heat source in the additive manufacturing process and the heat source lattice of the inverse hard lattice structure; The third adjustment module is used to adjust the distance between the heat source array points based on the path filling width and path shortening distance in the two directions of the arc-side gap and the flat-side gap.

[0016] Thirdly, embodiments of this application provide an electronic device, including: a processor, a storage medium, and a bus. The storage medium stores machine-readable instructions executable by the processor. When the electronic device is running, the processor communicates with the storage medium via the bus, and the processor executes the machine-readable instructions to perform the steps of the inverse hard lattice structure additive manufacturing method as described in any of the first aspects.

[0017] Fourthly, embodiments of this application provide a computer-readable storage medium storing a computer program, which, when executed by a processor, performs the steps of the inverse hard lattice structure additive manufacturing method according to any one of the first aspects.

[0018] This application provides an additive manufacturing method, apparatus, device, and medium for inverse hard lattice structures. The method involves acquiring an inverse hard lattice structure and obtaining a three-dimensional image of it. Based on the three-dimensional image, the method determines the straight-line and curved regions corresponding to the gaps in the inverse hard lattice structure, and determines a first additive manufacturing path for the straight-line region and a second additive manufacturing path for the curved region. Based on the first and second additive manufacturing paths, multi-dimensional welding parameters are determined. Under these multi-dimensional welding parameters, additive manufacturing is performed on the gaps in the inverse hard lattice structure using the first additive manufacturing path for the straight-line region and the second additive manufacturing path for the curved region, under the determined multi-dimensional welding parameters. This application achieves a high forming bonding rate and interfacial shear strength by using the first additive manufacturing path for the straight-line region and the second additive manufacturing path for the curved region to additively manufacture the gaps in the inverse hard lattice structure, thereby improving the metallurgical bonding degree of the filling and enhancing the reinforcement effect on hard nodes.

[0019] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a flowchart of the additive manufacturing method for inverse hard lattice structures provided in the embodiments of this application; Figure 2 This is a schematic diagram of additive manufacturing on the gaps of an inverse hard lattice structure; Figure 3 This is a diagram illustrating the path shortening distance and path fill width; Figure 4 This is a schematic diagram of path planning for a common inverse hard lattice structure in flat-side and arc-side gaps; Figure 5 This is a schematic diagram of the structure of the inverse hard lattice structure additive manufacturing device provided in the embodiments of this application; Figure 6 This is a schematic diagram of the structure of an electronic device according to an embodiment of this application. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. It should be understood that the accompanying drawings in this application are for illustrative and descriptive purposes only and are not intended to limit the scope of protection of this application. Furthermore, it should be understood that the schematic drawings are not drawn to scale. The flowcharts used in this application illustrate operations implemented according to some embodiments of this application. It should be understood that the operations in the flowcharts may not be implemented in sequence, and steps without logical contextual relationships may be reversed or implemented simultaneously. In addition, those skilled in the art, guided by the content of this application, may add one or more other operations to the flowcharts, or remove one or more operations from the flowcharts.

[0023] Furthermore, the described embodiments are merely some, not all, of the embodiments of this application. The components of the embodiments of this application described and illustrated herein can typically be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0024] It should be noted that the term "comprising" will be used in the embodiments of this application to indicate the presence of the features declared thereafter, but does not exclude the addition of other features.

[0025] Given the commonality of inverse lattice structures in practical engineering applications, cemented carbide, steel-bonded cemented carbide, or cermet are bonded to the substrate using methods such as brazing, spot welding, inlay casting, interference fit, and weld overlay. Some columns need to extend into the substrate, while others protrude, forming lattice nodes on the structural surface. The material filling of the remaining locations outside the nodes within this type of lattice structure framework involves the exploration and application of various filling methods.

[0026] Currently, in this type of lattice structure framework, the material filling method for positions other than nodes is to fill the gaps formed by welding between the studs, such as linear (one-line) filling, specifically through existing additive manufacturing systems after path planning. However, since stud nodes are usually irregular in shape, the reinforcement effect on rigid nodes is relatively general, and the metallurgical bonding of the filling is limited.

[0027] To address this issue, this application provides an additive manufacturing method, apparatus, equipment, and medium for inverse hard lattice structures. By using a first additive manufacturing path in a straight area and a second additive manufacturing path in an arc area under determined multi-dimensional welding parameters, additive manufacturing is performed on the gaps of the inverse hard lattice structure, achieving a high forming bonding rate and interfacial shear strength. This improves the metallurgical bonding degree of the filling and enhances the reinforcement effect on hard nodes.

[0028] Figure 1 This is a flowchart of an additive manufacturing method for an inverse hard lattice structure provided according to an embodiment of this application. For example... Figure 1 As shown, the additive manufacturing method for inverse hard lattice structures in this application embodiment may specifically include: S101. Obtain the inverse hard lattice structure and obtain a three-dimensional image of the inverse hard lattice structure. Based on the three-dimensional image, determine the straight line region and the arc region corresponding to the gap in the inverse hard lattice structure, and determine the first additive path for the straight line region and the second additive path for the arc region.

[0029] S102. Determine and obtain multi-dimensional welding parameters based on the first additive manufacturing path and the second additive manufacturing path.

[0030] S103. Under multi-dimensional welding parameters, additive manufacturing is performed on the gap of the inverse hard lattice structure based on the first additive manufacturing path in the straight area and the second additive manufacturing path in the arc area.

[0031] In the above-mentioned additive manufacturing method for inverse hard lattice structures, additive manufacturing is performed on the gaps of the inverse hard lattice structure through a first additive manufacturing path in the straight area and a second additive manufacturing path in the arc area under preset multi-dimensional welding parameters. This achieves a high forming bonding rate and interface shear strength, thereby improving the filling metallurgical bonding degree and enhancing the reinforcement effect on hard nodes.

[0032] The exemplary steps described above in the embodiments of this application are illustrated below with specific examples: S101, acquire the inverse hard lattice structure and acquire a three-dimensional image of the inverse hard lattice structure. Based on the three-dimensional image, determine the straight line region and the arc region corresponding to the gap in the inverse hard lattice structure, and determine the first additive path for the straight line region and the second additive path for the arc region.

[0033] Optionally, a scanning device (e.g., a laser scanning camera) can be used to acquire the inverse hard lattice structure, and the inverse hard lattice structure can be reconstructed and modeled in three dimensions to obtain a three-dimensional image of the inverse hard lattice structure.

[0034] In this embodiment, the gap in the inverse hard lattice structure refers to the gap that needs to be filled in the inverse hard lattice structure. The first additive path is the path required for additive manufacturing in the straight-line region of the gap, and the second additive path is the path required for additive manufacturing in the curved region of the gap. The straight-line and curved regions of the gap are determined, and the first additive path in the straight-line region and the second additive path in the curved region are obtained for subsequent processing. The additive path represents the walking path and the oscillation mode.

[0035] Optionally, when determining the first additive path for the straight area and the second additive path for the curved area, the first travel path and first oscillation mode for the straight area are determined; the second travel path and second oscillation mode for the curved area are determined. The first travel path is a straight line ("I"), the first oscillation mode is a zigzag oscillation, and the first oscillation mode has a preset oscillation width; the second travel path and the second oscillation mode together constitute a reciprocating zigzag oscillation. For example, as... Figure 2 As shown, this represents the planned path.

[0036] Specifically, in straight areas, an additive manufacturing path combining a straight line and a zigzag oscillation is used, with the preset oscillation width for the zigzag oscillation being 4-6mm; in curved areas, a reciprocating zigzag oscillation is used. For example, ... Figure 2 As shown.

[0037] S102, determine and obtain multi-dimensional welding parameters based on the first additive manufacturing path and the second additive manufacturing path.

[0038] In this embodiment, the multi-dimensional welding parameters include welding speed (i.e., the moving speed of the welding torch). Specifically, the multi-dimensional welding parameters include at least the welding wire diameter, welding current, welding voltage, wire feed speed, shielding gas type, shielding gas flow rate, arc length correction ratio, and pulse correction ratio. The determination of these multi-dimensional welding parameters can be based on the first additive manufacturing path and the second additive manufacturing path, thereby obtaining the multi-dimensional welding parameters for subsequent welding under the set welding parameters. It can be added that the welding method used in this application is MIG (Metal Injection Gas Welding), and its commonly used welding parameters are as described above. The wire feed speed refers to the forward speed of the welding wire in the welding torch's wire feed channel. The wire feed speed and welding speed need to be dynamically balanced to ensure that the amount of molten metal deposited per unit time precisely fills the molten pool space "created" by the movement of the welding torch per unit time. Optionally, a 1.6mm welding wire diameter, a welding current of 300~400A, a welding voltage of 28-31V, a wire feed speed of 6m / min, a shielding gas type of CO2, a shielding gas flow rate of 15L / min, an arc length correction ratio of 3.5% (or fluctuating around 3.5%), and a pulse correction ratio of 0 (or fluctuating around 0).

[0039] S103, under multi-dimensional welding parameters, additive manufacturing is performed on the gap of the inverse hard lattice structure based on the first additive manufacturing path in the straight area and the second additive manufacturing path in the arc area.

[0040] In this embodiment, based on the multi-dimensional welding parameters determined in step S102, and based on the additive manufacturing paths obtained in step S101—namely, the first additive manufacturing path in the straight area and the second additive manufacturing path in the curved area—additional material is applied to the gaps in the inverse hard lattice structure, which is equivalent to filling the gaps in the inverse hard lattice structure with material. This is achieved through welding. Optionally, additive metal is used to add material to the gaps in the inverse hard lattice structure, wherein the additive metal is also the filler material, or filler metal.

[0041] The additive manufacturing method for inverse hard lattice structures provided in this application involves acquiring an inverse hard lattice structure and obtaining a three-dimensional image of the structure. Based on the three-dimensional image, the method determines the straight and curved regions corresponding to the gaps in the inverse hard lattice structure, and determines a first additive manufacturing path for the straight regions and a second additive manufacturing path for the curved regions. Based on the first and second additive manufacturing paths, multi-dimensional welding parameters are determined. Under these multi-dimensional welding parameters, additive manufacturing is performed on the gaps in the inverse hard lattice structure using the first additive manufacturing path for the straight regions and the second additive manufacturing path for the curved regions. This additive manufacturing method for inverse hard lattice structures achieves a high forming bonding rate and interfacial shear strength by using the first additive manufacturing path for the straight regions and the second additive manufacturing path for the curved regions under the determined multi-dimensional welding parameters. This improves the metallurgical bonding degree of the filling and enhances the reinforcement effect on hard nodes.

[0042] Furthermore, for the gaps in the inverse hard lattice structure, the arc-shaped overlap and cross-shaped intersections of the gaps are determined; the welding speed at the cross-shaped intersections is determined, and the target welding speed at the arc-shaped overlaps is determined based on the welding speed at the cross-shaped intersections; in response to additive manufacturing of the gaps in the inverse hard lattice structure, the welding speed at the arc-shaped overlaps is adjusted to the target welding speed.

[0043] The target welding speed at the arc-shaped overlap is a multiple of the target welding speed at the cross intersection. For example, the target welding speed at the arc-shaped overlap is 1.5 to 2 times the welding speed at the cross intersection.

[0044] Specifically, the target welding speed at the arc-shaped overlap can be determined or adjusted based on the welding speed at the cross intersection. For example, the welding speed at the arc-shaped overlap can be 1.5 times that at the cross intersection. In this way, when adding material to the gap of the inverse hard lattice structure based on the first additive path in the straight area and the second additive path in the arc area, the welding speed at the arc-shaped overlap can be adjusted to the target welding speed.

[0045] It should be noted that when additive manufacturing is performed in the straight and curved regions according to their respective additive paths, the welding speed needs to be adjusted at the point where the arcs overlap. This is an adjustment of the inherent welding speed. Those skilled in the art will understand that the overlap area at the point where the arcs overlap should not be too high, therefore the welding speed at this location should be relatively fast.

[0046] Furthermore, the transverse overlap of the inverse hard lattice structure gap is determined; wherein, the transverse overlap represents the transverse overlap corresponding to the first additive path; in response to additive processing of the inverse hard lattice structure gap, the welding speed is adjusted at the arc overlap and the transverse overlap.

[0047] Among them, the lateral overlap represents the lateral overlap corresponding to the first additive path (without boundary), that is, the lateral overlap corresponding to the first walking path (in a straight line); the arc overlap represents the arc overlap of the inverse hard lattice structure (with boundary).

[0048] Specifically, in addition to adjusting the welding speed as described above, when adding material to the gaps of the inverse hard lattice structure using the first additive path in the straight area and the second additive path in the curved area, it is also necessary to adjust the welding speed at the arc-shaped overlap of the inverse hard lattice structure and the transverse overlap of the first additive path to achieve good forming at both the arc-shaped overlap (with boundaries) and the straight transverse overlap (currently without boundaries). Those skilled in the art will understand that, as... Figure 2 As shown in the figure, the welding speed corresponding to the long straight line (horizontal line) can be slower, while the welding speed corresponding to the short straight line (vertical line) can be faster.

[0049] Continuing, the inverse hard lattice structure corresponds to the matrix and the additive metal; the inverse hard lattice structure, matrix, and additive metal correspond to various metals; the additive manufacturing of the gaps in the inverse hard lattice structure corresponds to the path filling width and path shortening distance, meaning that different path filling widths and path shortening distances are involved when additively manufacturing the gaps in the inverse hard lattice structure. For example, the inverse hard lattice structure can be titanium carbide, the matrix can be steel-bonded cemented carbide, and the additive metal can be an iron-carbon alloy, thus corresponding to three metals; additionally, for example, such as... Figure 3 As shown, this represents the path shortening distance and the path fill width.

[0050] Furthermore, when additive manufacturing is performed on the gaps in the inverse hard lattice structure, the path filling width and the path shortening distance are controlled and adjusted to the target path filling width and the target path shortening distance. Based on the target path filling width and the target path shortening distance, the target forming bonding rate and the target interface shear strength at the interfaces of the various metals corresponding to the additive matrix are obtained. Based on the target path filling width and the target path shortening distance, the target average grain intercept of the additive matrix is ​​obtained.

[0051] Optionally, when performing additive manufacturing in a straight area based on the first additive manufacturing path, the path fill width is controlled and adjusted to the first target path fill width, and the path shortening distance is adjusted to the first target path shortening distance; when performing additive manufacturing in an arc area based on the second additive manufacturing path, the path fill width is controlled and adjusted to the second target path fill width, and the path shortening distance is adjusted to the second target path shortening distance.

[0052] The target forming bonding rate is the metallurgical bonding rate or metallurgical bonding degree. In this application, the inverse hard lattice structure gap is added to the substrate after the additive process is completed by adding the substrate through the first additive path based on the straight area and the second additive path based on the arc area. The target average grain intercept of the substrate after the additive process is within the range of the preset average grain intercept difference between the substrate before the additive process and the basic average grain intercept of the substrate before the additive process. The target average grain intercept is the preset target ratio of the average grain intercept of the substrate after the conventional double-I-shaped oscillation additive process.

[0053] Specifically, the target path filling width and target path shortening distance are used to ensure that the target forming bonding rate and target interface shear strength are achieved at the interfaces of the various metals corresponding to the additive matrix. The target interface shear strength is greater than the preset interface shear strength threshold. The average grain intercept of the additive matrix and the average grain intercept of the unadditive matrix are within the preset range of the difference between the average grain intercepts, and the average grain intercept of the additive matrix is ​​the preset target ratio of the average grain intercept of the matrix after conventional double-I-shaped oscillation additive manufacturing.

[0054] For example, in the curved area, the reciprocating zigzag pattern requires controlling the path filling width to be 3~4mm and the path shortening distance to be 2.8~3.2mm to achieve a high metallurgical bond at the interface of multiple metals, i.e., three metals (e.g., a target forming bonding rate of 98%), with an interface shear strength >400Mpa. This minimizes the impact on the base material matrix. The target average grain intercept is close to the basic average grain intercept of the base material matrix before additive manufacturing. The target average grain intercept is much lower than the average grain intercept of the base material after additive manufacturing using conventional double zigzag oscillation (both straight and curved areas are zigzag oscillations), approximately 1 / 6 of it.

[0055] It should be noted that the target average grain intercept of the additively processed matrix should be close to the basic average grain intercept of the matrix before additive processing. This indicates that the additive process has a smaller impact on the matrix. If the two cannot be close, the target average grain intercept of the additively processed matrix should also change in a beneficial direction, that is, the target average grain intercept should be smaller relative to the basic average grain intercept. This refines the grains in a beneficial direction. If the target average grain intercept is larger relative to the basic average grain intercept, it will lead to grain coarsening, which is a negative outcome. For example, the difference in average grain intercept can be within the range of 0.2 mm. That is, the difference between the target average grain intercept of the additively processed matrix and the basic average grain intercept of the matrix before additive processing is 0.2 mm, meaning the target average grain intercept is 0.2 mm smaller than the basic average grain intercept, achieving grain refinement in a beneficial direction.

[0056] Furthermore, the arc-side gap and the flat-side gap in the gap of the inverse hard lattice structure are determined; the path filling width in both directions of the arc-side gap and the flat-side gap is controlled to the target path filling width, and the path shortening distance is controlled to the target path shortening distance.

[0057] Among them, the arc-shaped gap corresponds to the arc region, and the flat-shaped gap corresponds to the straight-line region. For example, as Figure 4 As shown, this represents a common inverse hard lattice structure. During the additive manufacturing process, the path filling width and path shortening distance in both the arc-side gap and the flat-side gap directions are controlled.

[0058] Furthermore, the distance between the heat source in the additive manufacturing process and the heat source lattice of the inverse hard lattice structure is determined; the distance between the heat source lattice is adjusted based on the path filling width and path shortening distance in both the arc-side gap and the flat-side gap directions.

[0059] For example, such as Figure 4 As shown, in the additive manufacturing process, in addition to controlling the path filling width and path shortening distance in both the arc side gap and the flat side gap, it is also necessary to control the distance between the heat source and the inverse hard lattice structure.

[0060] Furthermore, the target forming bonding rate and target interface shear strength of the inverse hard lattice structure gaps are obtained after additive manufacturing using a first additive path based on a straight region and a second additive path based on an arc region. The conventional forming bonding rate of the interface after additive manufacturing of the inverse hard lattice structure gaps using a double-I-shaped oscillation method, as well as the target forming bonding rate under different path filling widths, are determined. Based on the target forming bonding rate and conventional forming bonding rate under different path filling widths, the influence of different additive paths and different path filling widths on the forming bonding rate is evaluated.

[0061] For example, as shown in Table 1 below, the molding bonding rate of the conventional double-line type can be compared with the molding bonding rate of the technical solution of this application under different path filling widths, thereby evaluating the influence of different additive paths and different path filling widths on the molding bonding rate.

[0062] Table 1

[0063] Furthermore, the average intercept of conventional grains and the average interfacial shear strength of the interface after additive manufacturing using the double-I-shaped oscillation method are determined. Based on the average intercept of conventional grains, the average interfacial shear strength, the average intercept of target grains, and the target interfacial shear strength, the effects of different additive manufacturing paths and different path fill widths on the average intercept of grains and the interfacial shear strength are evaluated.

[0064] For example, as shown in Table 2 below, the average grain intercept and interfacial shear strength of conventional double-I-shaped additive manufacturing can be compared with the average grain intercept and interfacial shear strength of the technical solution of this application under different path filling widths, thereby evaluating the influence of different additive manufacturing paths and different path filling widths on the molding bonding rate.

[0065] Table 2

[0066] It should be noted that the additive manufacturing method for an inverse hard lattice structure in this application, namely, a method for filling gaps in an inverse hard lattice structure, or a path planning method under gap filling in an inverse hard lattice structure, can also be an additive manufacturing method under gap filling in an inverse hard lattice structure.

[0067] Figure 5 This is a schematic diagram of the structure of the inverse hard lattice structure additive manufacturing device provided in the embodiments of this application; as shown below. Figure 5 As shown, the inverse hard lattice structure additive manufacturing device 500 of this application embodiment may specifically include: The first acquisition module 501 acquires the inverse hard lattice structure and obtains a three-dimensional image of the inverse hard lattice structure. Based on the three-dimensional image, it determines the straight line region and the arc region corresponding to the gap in the inverse hard lattice structure, and determines the first additive path for the straight line region and the second additive path for the arc region.

[0068] The first determining module 502 is used to determine and obtain multi-dimensional welding parameters based on the first additive manufacturing path and the second additive manufacturing path; wherein, the multi-dimensional welding parameters include welding speed.

[0069] The first additive manufacturing module 503 is used to perform additive manufacturing on the gap of the inverse hard lattice structure based on the first additive manufacturing path in the straight area and the second additive manufacturing path in the arc area under multi-dimensional welding parameters.

[0070] In one possible implementation, the additive path represents the walking path and the oscillation mode; the first determining module is specifically used for: Determine the first walking path and the first swing mode in the straight line area; wherein, the first walking path is a straight line, the first swing mode is a zigzag swing, and the first swing mode has a preset swing width; Determine the second walking path and the second swing mode of the arc region; wherein, the second walking path and the second swing mode together constitute a reciprocating back-and-forth zigzag swing.

[0071] In one possible implementation, the inverse hard lattice structure additive manufacturing apparatus includes: The second determining module is used to determine the arc-shaped overlapping points and cross-shaped intersection points of the inverse hard lattice structure gaps. The third determining module is used to determine the welding speed at the cross intersection, and to determine the target welding speed at the arc overlap based on the welding speed at the cross intersection; wherein, the target welding speed at the arc overlap is a target multiple of the welding speed at the cross intersection. The first adjustment module is used to adjust the welding speed at the arc-directional overlap point to the target welding speed in response to additive manufacturing of the gap in the inverse hard lattice structure. In one possible implementation, the inverse hard lattice structure additive manufacturing apparatus includes: The fourth determining module is used to determine the lateral overlap of the gaps in the inverse hard lattice structure; wherein, the lateral overlap represents the lateral overlap corresponding to the first additive path; The second adjustment module is used to adjust the welding speed at the arc-shaped overlap and the transverse overlap in response to the additive manufacturing of the gap in the inverse hard lattice structure based on the first additive manufacturing path in the straight area and the second additive manufacturing path in the arc area; wherein the arc-shaped overlap represents the arc-shaped overlap of the inverse hard lattice structure. In one possible implementation, the inverse hard lattice structure corresponds to the base material matrix and the additive metal, and the inverse hard lattice structure, the base material matrix, and the additive metal correspond to multiple metals; the additive manufacturing of the gaps in the inverse hard lattice structure corresponds to the path filling width and the path shortening distance; the inverse hard lattice structure additive manufacturing device includes: The fourth determining module is used to control and adjust the path filling width to the target path filling width and the path shortening distance to the target path shortening distance when additive manufacturing is applied to the gaps in the inverse hard lattice structure. The second acquisition module is used to acquire the target forming bonding rate and target interface shear strength at the interface of the various metals corresponding to the additive parent material matrix based on the target path filling width and the target path shortening distance. The third acquisition module is used to obtain the target grain average intercept of the parent material matrix after additive manufacturing based on the target path fill width and the target path shortening distance; wherein the target grain average intercept and the basic grain average intercept of the parent material matrix before additive manufacturing are within the preset grain average intercept difference range.

[0072] In one possible implementation, the inverse hard lattice structure additive manufacturing apparatus includes: The fifth determining module is used to determine the arc-side gap and the flat-side gap in the gap of the inverse hard lattice structure; wherein, the arc-side gap corresponds to the arc region and the flat-side gap corresponds to the straight region. The control module is used to control the path filling width to the target path filling width and the path shortening distance to the target path shortening distance in both the arc side gap and the flat side gap directions.

[0073] In one possible implementation, the inverse hard lattice structure additive manufacturing apparatus includes: The sixth determining module is used to determine the distance between the heat source in the additive manufacturing process and the heat source lattice of the inverse hard lattice structure; The third adjustment module is used to adjust the distance between heat source lattice points based on the path filling width and path shortening distance in both the arc side gap and the flat side gap directions.

[0074] The additive manufacturing apparatus for inverse hard lattice structures provided in this application acquires an inverse hard lattice structure and obtains a three-dimensional image of the structure. Based on the three-dimensional image, it determines the straight and curved regions corresponding to the gaps in the inverse hard lattice structure, and determines a first additive manufacturing path for the straight region and a second additive manufacturing path for the curved region. Based on the first and second additive manufacturing paths, it determines and obtains multi-dimensional welding parameters. Under these multi-dimensional welding parameters, it performs additive manufacturing on the gaps in the inverse hard lattice structure based on the first and second additive manufacturing paths for the straight and curved regions. This additive manufacturing apparatus for inverse hard lattice structures, through the first and second additive manufacturing paths for the straight and curved regions under the determined multi-dimensional welding parameters, achieves a high forming bonding rate and interfacial shear strength, thereby improving the metallurgical bonding degree of the filling and enhancing the reinforcement effect on hard nodes.

[0075] like Figure 6 As shown in the embodiment of this application, an electronic device 600 includes a processor 601, a memory 602, and a bus. The memory 602 stores machine-readable instructions executable by the processor 601. When the electronic device is running, the processor 601 communicates with the memory 602 via the bus, and the processor 601 executes the machine-readable instructions to perform the steps of the inverse hard lattice structure additive manufacturing method described above.

[0076] Specifically, the memory 602 and processor 601 mentioned above can be general-purpose memory and processor, without any specific limitations. When the processor 601 runs the computer program stored in the memory 602, it can execute the above-mentioned inverse hard lattice structure additive manufacturing method.

[0077] Corresponding to the above-described inverse hard lattice structure additive manufacturing method, this application embodiment also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, performs the steps of the above-described inverse hard lattice structure additive manufacturing method.

[0078] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems and devices described above can be referred to the corresponding processes in the method embodiments, and will not be repeated here. In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of modules is only a logical functional division, and in actual implementation, there may be other division methods. Furthermore, multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed mutual coupling or direct coupling or communication connection can be through some communication interfaces; the indirect coupling or communication connection of devices or modules can be electrical, mechanical, or other forms.

[0079] The modules described as separate components may or may not be physically separate. The components shown as modules may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0080] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0081] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a processor-executable, non-volatile, computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the deployment methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, ROM, RAM, magnetic disks, or optical disks.

[0082] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for additive manufacturing of inverse hard lattice structures, characterized in that, The method includes: Obtain the inverse hard lattice structure and obtain a three-dimensional image of the inverse hard lattice structure. Based on the three-dimensional image, determine the straight line region and the arc region corresponding to the gap of the inverse hard lattice structure, and determine the first additive path of the straight line region and the second additive path of the arc region. Based on the first additive manufacturing path and the second additive manufacturing path, multi-dimensional welding parameters are determined and obtained; wherein, the multi-dimensional welding parameters include welding speed; Under the multi-dimensional welding parameters, additive manufacturing is performed on the gaps of the inverse hard lattice structure based on the first additive path in the straight region and the second additive path in the arc region.

2. The method according to claim 1, characterized in that, The additive path characterizes the walking path and oscillation mode; determining the first additive path for the straight area and the second additive path for the curved area includes: Determine the first walking path and the first swing mode of the straight line area; wherein, the first walking path is a straight line, the first swing mode is a zigzag swing, and the first swing mode has a preset swing width; Determine the second walking path and the second swing mode of the arc region; wherein the second walking path and the second swing mode together constitute a reciprocating back-and-forth zigzag swing.

3. The method according to claim 2, characterized in that, The method further includes: For the gaps in the inverse hard lattice structure, the arc-shaped overlap and cross-shaped intersection of the gaps in the inverse hard lattice structure are determined; Determine the welding speed at the cross intersection, and determine the target welding speed at the arc overlap based on the welding speed at the cross intersection; wherein, the target welding speed at the arc overlap is a target multiple of the welding speed at the cross intersection; In response to additive manufacturing of the gap in the inverse hard lattice structure, the welding speed at the arc-shaped overlap is adjusted to the target welding speed.

4. The method according to claim 3, characterized in that, The method further includes: Determine the lateral overlap of the gaps in the inverse hard lattice structure; wherein, the lateral overlap represents the lateral overlap corresponding to the first additive path; In response to additive manufacturing of the gap in the inverse hard lattice structure based on a first additive path in the straight region and a second additive path in the arc region, the welding speed is adjusted at the arc-directional overlap and the transverse overlap; wherein the arc-directional overlap characterizes the arc-directional overlap of the inverse hard lattice structure.

5. The method according to claim 4, characterized in that, The inverse hard lattice structure corresponds to the base material matrix and the additive metal, and the inverse hard lattice structure, the base material matrix, and the additive metal correspond to various metals; The additive manufacturing path filling width and path shortening distance of the gaps in the inverse hard lattice structure; the method further includes: When adding material to the gaps in the inverse hard lattice structure, the path filling width is controlled and adjusted to the target path filling width, and the path shortening distance is adjusted to the target path shortening distance. Based on the target path filling width and the target path shortening distance, the target forming bonding rate and target interface shear strength at the interfaces of various metals corresponding to the additive matrix are obtained. The target grain average intercept of the parent matrix after additive manufacturing is obtained based on the target path fill width and the target path shortening distance; wherein the target grain average intercept and the basic grain average intercept of the parent matrix before additive manufacturing are within a preset grain average intercept difference range.

6. The method according to claim 5, characterized in that, The method further includes: Determine the arc-side gap and the flat-side gap in the gap of the inverse hard lattice structure; wherein the arc-side gap corresponds to the arc region and the flat-side gap corresponds to the straight region; Control the path filling width in both the arc-side gap and the flat-side gap to the target path filling width, and the path shortening distance to the target path shortening distance.

7. The method according to claim 6, characterized in that, The method further includes: Determine the distance between the heat source in the additive manufacturing process and the heat source lattice of the inverse hard lattice structure; The distance between the heat source array points is adjusted based on the path filling width and path shortening distance in both the arc-side gap and the flat-side gap directions.

8. An additive manufacturing device for an inverse hard lattice structure, characterized in that, The device includes: The first acquisition module acquires the inverse hard lattice structure and acquires a three-dimensional image of the inverse hard lattice structure. Based on the three-dimensional image, it determines the straight line region and the arc region corresponding to the gap in the inverse hard lattice structure, and determines the first additive path for the straight line region and the second additive path for the arc region. The first determining module is used to determine multi-dimensional welding parameters based on the first additive manufacturing path and the second additive manufacturing path; wherein the multi-dimensional welding parameters include welding speed. The first additive manufacturing module is used to perform additive manufacturing on the gap of the inverse hard lattice structure based on the first additive manufacturing path in the straight line region and the second additive manufacturing path in the arc region under the multi-dimensional welding parameters.

9. An electronic device, characterized in that, include: The device includes a processor, a memory, and a bus. The memory stores machine-readable instructions executable by the processor. When the electronic device is running, the processor communicates with the memory via the bus. When the machine-readable instructions are executed by the processor, the steps of the inverse hard lattice structure additive manufacturing method as described in any one of claims 1 to 7 are performed.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, performs the steps of the inverse hard lattice structure additive manufacturing method as described in any one of claims 1 to 7.

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