Deposition type additive manufacturing bow-shaped path parameter determination method and related equipment

Abstract

The invention discloses a method for determining parameters of a bow-shaped path for deposition type additive manufacturing and related equipment, and relates to the technical field of additive manufacturing. The method comprises the steps that the filling distance of a first deposition layer and the filling distance of a second deposition layer of a to-be-formed component are obtained; based on the filling distance of the first deposition layer, the first number of the long-channel metal of the first deposition layer and the inter-channel tower connection proportion of the long-channel metal, the single-channel deposition metal width of the first deposition layer is determined; according to the width of the single-channel deposited metal and the inter-channel tower connection proportion, the channel spacing of the long-channel metal of the first deposition layer is obtained; and determining a second quantity of the long channel metal of the second deposition layer based on the channel spacing of the long channel metal of the first deposition layer and the filling distance of the second deposition layer. According to the method, path parameters of the bow-shaped path are set according to steps, so that the test and error cost can be greatly reduced, effective path parameters can be quickly obtained, and the development period of an additive manufacturing process is shortened, so that the development efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of additive manufacturing technology, and in particular to a method for determining bow path parameters in deposition-type additive manufacturing and related equipment. Background Art

[0002] Deposition-based additive manufacturing technology uses high-energy beams such as lasers, arcs, and electron beams to melt fed powder or wire, depositing metal line by line, surface by surface, and layer by layer on the substrate to achieve additive manufacturing of complex structures. It has the advantages of high material utilization and high forming efficiency, and is of great value in structural manufacturing in the aerospace field.

[0003] The components formed by deposition-type additive manufacturing are composed of multiple deposition layers, and each deposition layer is composed of multiple single-track deposited metals. The organizational form of the single-track deposited metals depends on the path planning method of additive manufacturing. When performing path planning, the three-dimensional model of the component must first be sliced ​​layer by layer to obtain the slice contours of each layer. The bow-shaped path can fill slices of arbitrary geometric shapes and is a type of path planning method that is generally applicable in the field of additive manufacturing. However, the bow-shaped path has path parameters such as track spacing, the number of single-track overlapped metals, the width of a single-track metal, and the bow-shaped filling direction. The interactive coupling of multiple parameters affects the flatness, contour accuracy and other forming geometric accuracy indicators of the formed deposition layer. At present, the path parameters are generally determined by a large number of trial and error methods, which takes a long time, consumes a lot of powder or wire raw materials, and is costly. It can be seen that this method has the problem of low efficiency. Summary of the Invention

[0004] The embodiments of the present application provide a method for determining the bow path parameters of deposition-based additive manufacturing and related equipment, thereby improving the efficiency of determining the bow path parameters of deposition-based additive manufacturing, at least to a certain extent.

[0005] The Summary of the Invention introduces a series of simplified concepts that will be further described in the Detailed Description of the Invention. The Summary of the Invention of this application is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0006] This application specifically includes the following aspects:

[0007] In a first aspect, the present application proposes a method for determining the parameters of a zigzag path for deposition-based additive manufacturing. The zigzag path parameters include the width of a single track of deposited metal in a deposition layer of a component to be formed, the track spacing and number of long tracks of metal in the deposition layer, and include:

[0008] Obtaining a filling distance of a first deposition layer and a filling distance of a second deposition layer of a component to be formed;

[0009] Determining a single-track width of the first deposition layer based on a filling distance of the first deposition layer, a first number of long tracks of metal in the first deposition layer, and a taper ratio between tracks of the long tracks of metal, wherein the long tracks of metal are single-track deposited metal segments excluding the head and tail connecting segments in the zigzag path;

[0010] Obtaining a track pitch of long tracks of metal in the first deposition layer according to the width of the single track deposited metal and the ratio of the tower connections between tracks;

[0011] A second quantity of the long track metal of the second deposition layer is determined based on the track pitch of the long track metal of the first deposition layer and the filling distance of the second deposition layer.

[0012] In a feasible embodiment, obtaining the filling distance of the first deposition layer and the filling distance of the second deposition layer of the component to be formed includes:

[0013] Obtaining a slice profile of the component to be formed;

[0014] Extracting the minimum area envelope rectangle of the slice contour;

[0015] A filling distance of the first deposition layer and a filling distance of the second deposition layer are determined based on the minimum area envelope.

[0016] In a feasible implementation manner, determining the filling distance of the first deposition layer and the filling distance of the second deposition layer based on the minimum area envelope rectangle includes:

[0017] The first and second deposition layers are arranged in a zigzag filling direction based on the minimum area envelope rectangle, wherein: if the minimum area envelope rectangle is a non-square, the first deposition layer is arranged in a zigzag filling direction parallel to the short side of the non-square, and the second deposition layer is arranged in a zigzag filling direction parallel to the long side of the non-square; if the minimum area envelope rectangle is a square, the first and second deposition layers are arranged in a zigzag filling direction parallel to the sides of the square;

[0018] Based on the arc-shaped filling directions of the first deposition layer and the second deposition layer, a filling distance of the first deposition layer and a filling distance of the second deposition layer are determined.

[0019] In a feasible implementation manner, the filling distance is used to represent the length of a side of the minimum area envelope rectangle that is parallel to the bow filling direction; and determining the filling distance of the first deposition layer and the filling distance of the second deposition layer based on the bow filling directions of the first deposition layer and the second deposition layer includes:

[0020] If the minimum area envelope rectangle is a non-square, then based on the arc-shaped filling directions of the first deposition layer and the second deposition layer, the filling distance of the first deposition layer is determined to be the length of the short side of the non-square, and the filling distance of the second deposition layer is determined to be the length of the long side of the non-square;

[0021] If the minimum area envelope rectangle is a square, the filling distances of the first deposition layer and the second deposition layer are determined to be the side length of the square based on the bow filling directions of the first deposition layer and the second deposition layer.

[0022] In a feasible embodiment, the width of a single deposited metal track of the first deposition layer is calculated by the following formula:

[0023]

[0024] Wherein, w0 is the width of a single deposited metal track of the first deposition layer, A is the filling distance of the first deposition layer, k is the first number of long tracks of metal in the first deposition layer, and α is the tower connection ratio between the long tracks of metal in the first deposition layer.

[0025] In a feasible implementation manner, determining the second quantity of the long metal tracks of the second deposition layer based on the track spacing of the long metal tracks of the first deposition layer and the filling distance of the second deposition layer includes:

[0026] Performing a flatness check on the track spacing of the long track metal of the first deposition layer to obtain a check result;

[0027] If the verification result does not meet the target requirement, the second quantity is the first quantity;

[0028] If the verification result meets the target requirement, a floating-point parameter is obtained based on the filling distance of the second deposition layer, the width of the single-track deposited metal, and the track spacing of the long track metal of the first deposition layer, and the second quantity is determined according to the floating-point parameter.

[0029] In a feasible implementation manner, the floating-point parameter includes an integer part value and a decimal part value, and determining the second quantity according to the floating-point parameter includes:

[0030] If the product of the fractional part value and the track pitch of the long track metal of the first deposition layer meets a preset threshold, the second number is the sum of the integer part value and 2;

[0031] If the product of the fractional part value and the track pitch of the long track metal of the first deposition layer does not meet the preset threshold, the second number is the sum of the integer part value and 1.

[0032] In a second aspect, the present application proposes a system for determining a zigzag path parameter for deposition-based additive manufacturing, which is applied to the zigzag path parameter determination method for deposition-based additive manufacturing described in any one of the above embodiments. The zigzag path parameters include the width of a single track of deposited metal in a deposition layer of a component to be formed, the track spacing and number of long tracks of metal in the deposition layer, and include:

[0033] A parameter acquisition module, configured to acquire a filling distance of a first deposition layer and a filling distance of a second deposition layer of a component to be formed;

[0034] a first calculation module, configured to determine a width of a single run of deposited metal in the first deposition layer based on a filling distance of the first deposition layer, a first number of long runs of metal in the first deposition layer, and a taper ratio between runs of the long runs of metal, wherein the long run of metal is a single run of deposited metal segment in the bow path excluding the head and tail connecting segments;

[0035] a second calculation module, configured to obtain a track pitch of long tracks of metal in the first deposition layer according to the width of the single track deposited metal and the ratio of the tower connection between tracks;

[0036] The third calculation module is configured to determine a second quantity of the long metal run of the second deposition layer based on the track spacing of the long metal run of the first deposition layer and the filling distance of the second deposition layer.

[0037] In a third aspect, an electronic device comprises: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor is configured to implement the steps of the method for determining the bow path parameters of deposition-based additive manufacturing as described in any one of the first aspects above when executing the computer program stored in the memory.

[0038] In a fourth aspect, the present application further proposes a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the method for determining the bow path parameters of deposition-type additive manufacturing of any one of the first aspects.

[0039] In summary, the bow path parameter determination method for deposition-type additive manufacturing proposed in this application can significantly reduce the cost of trial and error by setting the path parameters of the bow path, quickly obtain effective path parameters, shorten the additive manufacturing process development cycle, and thus improve research and development efficiency.

[0040] The method for determining the bow path parameters of deposition-type additive manufacturing proposed in this application, and other advantages, objectives and features of this application will be reflected in part through the following description, and in part will also be understood by technical personnel in this field through research and practice of this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present description. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0042] Figure 1 A schematic diagram of the process of determining the parameters of a bow path in a deposition-based additive manufacturing method provided in an embodiment of the present application;

[0043] Figure 2 A schematic diagram of a three-dimensional digital model of a component and its slice outline and minimum area enveloping rectangle provided in an embodiment of the present application;

[0044] Figure 3 A schematic diagram of a bow path composition provided in an embodiment of the present application;

[0045] Figure 4 A schematic diagram of a filling distance provided in Example 1 of the present application;

[0046] Figure 5 A schematic diagram of two filling distances when the minimum area enveloping rectangle provided in Example 1 of the present application is non-square;

[0047] Figure 6 A schematic diagram of a three-dimensional digital model of a component and its slice outline and minimum area enveloping rectangle provided in Example 2 of the present application;

[0048] Figure 7 A schematic diagram of two filling distances when the minimum area enveloping rectangle provided in Example 2 of the present application is non-square;

[0049] Figure 8 A schematic diagram of the functional modules of a system for determining bow path parameters for deposition-based additive manufacturing provided in an embodiment of the present application;

[0050] Figure 9 A schematic diagram of the structure of an electronic device for determining the bow path parameters of a deposition-type additive manufacturing method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0051] In order to better understand the technical solutions provided by the embodiments of this specification, the technical solutions of the embodiments of this specification are described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0052] In this article, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also include elements inherent to such process, method, article or equipment. In the absence of further restrictions, the elements defined by the statement "comprising a ..." do not exclude the presence of other identical elements in the process, method, article or equipment comprising the elements. The term "two or more" includes two or more than two cases.

[0053] See also Figure 1 The embodiments of the present application provide a method for determining the parameters of the bow path of deposition-based additive manufacturing, which can improve the efficiency of determining the parameters of the bow path of deposition-based additive manufacturing, at least to a certain extent. The main body of the bow path is composed of multiple single-track deposited metals connected at the first position. The first connected part is defined as short-track metal, and the rest is defined as long-track metal. The direction in which the bow path fills the slice of the additively manufactured component model is perpendicular to the long-track metal. The basic parameters of the bow path include: filling distance A, number of long-track metals k, and overlap amount α between tracks. The number of long-track metals k is an integer. When the path planned according to the component model slice consists of a contour path and a bow path, k>4; when the slice consists only of a bow path, k>1, which can ensure that the bow path is composed of at least two single-track deposited metals overlapping. The overlap amount α between tracks is the ratio of the overlapping amount of adjacent long-track metal widths to the width of a complete long-track metal. In order to ensure sufficient fusion between adjacent long-track metals, avoid defects of unfused tracks, and avoid interlayer defects caused by excessive overlap, the range of α is 0.25≤α≤0.5, that is, not less than 1 / 4 of the width of a single-track deposited metal, and not more than half of the width of a single-track deposited metal. Based on the above-mentioned basic parameters of the zigzag path, this application obtains other zigzag path parameters such as the width of a single deposited metal track of the deposited layer of the component to be formed, the track spacing and number of long tracks of metal in the deposited layer.

[0054] like Figure 1 As shown, Figure 1 A schematic diagram of a process for determining bow path parameters for deposition-based additive manufacturing provided in an embodiment of the present application includes:

[0055] S110 , obtaining a filling distance of a first deposition layer and a filling distance of a second deposition layer of a component to be formed.

[0056] For example, the fill distance refers to the length of the bow path along the fill direction within the deposition layer. By analyzing the minimum area envelope of the sliced ​​contour of the component to be formed, the fill direction and corresponding fill distance of two adjacent deposition layers—the first and second deposition layers (i.e., the nth and n+1th layers)—are determined. Determining the fill direction using the minimum area envelope maximizes the utilization of the deposition layer space, reduces path redundancy, and provides a geometric foundation for subsequent parameter calculations.

[0057] S120. Determine the width of a single-track deposited metal of the first deposition layer based on the filling distance of the first deposition layer, the first number of long-track metals of the first deposition layer, and the ratio of the tower connections between the long-track metals, wherein the long-track metals are the single-track deposited metal segments in the bow path excluding the head and tail connection segments.

[0058] For example, based on the filling distance of the first deposition layer, the first number of long metal strips of the first deposition layer, and the tower connection ratio between the long metal strips, the width of a single deposited metal strip of the first deposition layer is calculated by the following formula (1), thereby avoiding the material waste of the traditional trial and error method and ensuring that the width of a single metal strip is within the formable range of the equipment.

[0059] In some examples, the width of a single deposited metal pass in the first deposition layer is calculated using the following formula:

[0060]

[0061] Wherein, w0 is the width of a single deposited metal track of the first deposition layer, A is the filling distance of the first deposition layer, k is the first number of long tracks of metal in the first deposition layer, and α is the tower connection ratio between the long tracks of metal in the first deposition layer.

[0062] It should be noted that if the additive manufacturing equipment used cannot form and calculate w0 when k and α meet the basic parameters of the bow path, it means that this bow path is not applicable.

[0063] S130 , obtaining the track pitch of the long tracks of the first deposition layer according to the width of the single track deposited metal and the ratio of the tower connection between the tracks.

[0064] For example, as shown in equation (2) below, the track spacing of long metal runs in the first deposited layer is the center-to-center distance between adjacent long metal runs. This spacing is calculated from the width of a single run of deposited metal in the first deposited layer and the ratio of the taper between runs of the long metal runs in the first deposited layer, and must meet the equipment flatness requirements. The track spacing directly affects the flatness of the deposited layer, and this calculation ensures that adjacent metal runs are fully fused to avoid defects such as lack of fusion or excessive overlap.

[0065] β=(1-α)w0(2);

[0066] Furthermore, parameter A' is set as the side length of the slice envelope rectangle parallel to the long metal of the deposition layer; parameter α t Parameter used to characterize the presence or absence of contour path (α t is the overlap between paths α, when there is no contour path α t =1); parameter γ is the minimum ratio of β to the length of a single long metal strip, generally 1 / 4 to 1 / 5, which is determined by the equipment performance. If this ratio is exceeded, the first joint of adjacent long metal strips will be severely convex, resulting in a decrease in the flatness of the deposited layer. After calculating β, the following formula (3) is used to determine whether it meets the requirements:

[0067] β≤γ[A'-w0+2(α t +1)](3);

[0068] If β cannot meet the requirements, it is necessary to adjust the overlap between tracks α and the number of long track metals k within the basic parameter range, and obtain the formable single track deposited metal width w0, and then calculate the track spacing β, and repeat until β meets the requirements.

[0069] S140 , determining a second quantity of the long track metal of the second deposition layer based on the track pitch of the long track metal of the first deposition layer and the filling distance of the second deposition layer.

[0070] For example, the second number of long metal runs in the second deposited layer is calculated based on the track spacing of the long metal runs in the first deposited layer and the fill distance of the second deposited layer. By adjusting the number of long metal runs, the precision of the tower connection between the second deposited layer and the first deposited layer is ensured, thereby improving the forming quality of the overall component.

[0071] In some examples, determining a second amount of long run metal of the second deposited layer based on a run pitch of the long run metal of the first deposited layer and a fill distance of the second deposited layer includes:

[0072] Performing a flatness check on the track spacing of the long track metal of the first deposition layer to obtain a check result;

[0073] If the verification result does not meet the target requirement, the second quantity is the first quantity;

[0074] If the verification result meets the target requirement, a floating-point parameter is obtained based on the filling distance of the second deposition layer, the width of the single-track deposited metal, and the track pitch of the long track metal of the first deposition layer, and the second quantity is determined according to the floating-point parameter.

[0075] For example, the flatness of the long metal track spacing of the first deposition layer is checked according to the above formula (3) to determine whether the long metal track spacing of the first deposition layer meets the target requirement, and then the second number of the long metal track number of the second deposition layer is determined as follows:

[0076] If the verification result fails to meet the target requirements, the second deposition layer is adjusted so that its bow path is completely consistent with the first deposition layer, and the amount of metal in its long path is the same as that of the first deposition layer;

[0077] If the verification result meets the target requirements, first set the floating-point parameter k0, which contains the integer part k 0N and the fractional part k 0F , k0 and β, w0, A satisfy the following relationship:

[0078]

[0079] In some examples, the floating-point parameter includes an integer part value and a fractional part value, and determining the second quantity based on the floating-point parameter includes:

[0080] If the product of the fractional part value and the track pitch of the long track metal of the first deposited layer meets the predetermined threshold, the second number is the sum of the integer part value and 2;

[0081] If the product of the fractional part value and the track pitch of the long track metal of the first deposition layer does not meet the preset threshold, the second number is the sum of the integer part value and 1.

[0082] For example, k 0F is the ratio of the distance less than one full track spacing β to β, if k 0F When the product of k and β satisfies the following formula (5), k = k 0N +2, at this time, the overlap between the last long metal and the adjacent long metal along the filling direction of the bow path is the product of k0 and β, otherwise k=k 0N +1, deleted the last long metal and its connected short metal path.

[0083] 0.5w0≤k 0F ×β≤0.75w0(5).

[0084] In some examples, obtaining a filling distance of a first deposition layer and a filling distance of a second deposition layer of a component to be formed includes:

[0085] Obtaining a slice profile of a component to be formed;

[0086] Extract the minimum area envelope rectangle of the slice contour;

[0087] A filling distance of the first deposition layer and a filling distance of the second deposition layer are determined based on the minimum area envelope rectangle.

[0088] For example, Figure 2As shown in the figure, the 3D digital model N1 of the component to be formed is sliced ​​to obtain the slice contour N2. The algorithm then extracts its minimum area enveloping rectangle N3. The side length of this rectangle is the candidate value for the infill distance. By standardizing the infill distance acquisition process, manual judgment errors are avoided and a unified geometric benchmark is provided for subsequent parameter calculations.

[0089] In some examples, determining a filling distance of the first deposition layer and a filling distance of the second deposition layer based on a minimum area envelope includes:

[0090] The first and second deposition layers are arranged in a zigzag filling direction based on the minimum area enveloping rectangle, wherein: if the minimum area enveloping rectangle is a non-square, the first deposition layer is arranged in a zigzag filling direction parallel to the short side of the non-square, and the second deposition layer is arranged in a zigzag filling direction parallel to the long side of the non-square; if the minimum area enveloping rectangle is a square, the first and second deposition layers are arranged in a zigzag filling direction parallel to the sides of the square;

[0091] Based on the arc-shaped filling directions of the first deposition layer and the second deposition layer, a filling distance of the first deposition layer and a filling distance of the second deposition layer are determined.

[0092] In some examples, the filling distance is used to represent the length of a side of a minimum area envelope rectangle that is parallel to a bow filling direction; and determining the filling distance of the first deposition layer and the filling distance of the second deposition layer based on the bow filling directions of the first deposition layer and the second deposition layer includes:

[0093] If the minimum area enveloping rectangle is a non-square, then based on the bow filling directions of the first and second deposition layers, the filling distance of the first deposition layer is determined to be the length of the short side of the non-square, and the filling distance of the second deposition layer is determined to be the length of the long side of the non-square;

[0094] If the minimum area enveloping rectangle is a square, the filling distances of the first deposition layer and the second deposition layer are determined to be the side length of the square based on the arc-shaped filling directions of the first deposition layer and the second deposition layer.

[0095] For example, after slicing the model, the first and second deposition layers are set to have perpendicular filling directions in the zigzag path. Furthermore, when the minimum area enveloping rectangle of the slice outline is a square, the filling distance A is the side length of the square, and both the first and second deposition layers are parallel to the side length of the square. When the minimum area enveloping rectangle of the slice outline is not a square, the filling distance A has two values: the short side A1 and the long side A2 of the enveloping rectangle. The filling direction of the first deposition layer is set to be parallel to the filling distance A1, and the filling direction of the second deposition layer is set to be parallel to the filling distance A2.

[0096] In summary, the path parameters of the first deposition layer and the second deposition layer are determined through steps S110 to S140, that is, the path parameters are transformed every other layer, which are input into the planning software, and the machine tool-recognizable path code of each deposition layer of the component to be formed is output, and imported into the machine tool equipment to perform additive manufacturing. The bow path parameter determination method for deposition-type additive manufacturing provided in this application can greatly reduce the trial and error cost, quickly obtain effective path parameters, shorten the additive manufacturing process development cycle and improve research and development efficiency.

[0097] The technical solution of this application is further described in detail below through specific embodiments.

[0098] In Example 1:

[0099] S11. Define the components of the bow path such as Figure 3 As shown, it includes a long metal track M1 and a short metal track M2 connected at its ends, and the filling direction M3 of the bow path is perpendicular to the long metal track;

[0100] The basic parameters of the bow path include: filling distance A, the amount of metal in the long track k, and the overlap between tracks α;

[0101] The filling distance A is the length of the side parallel to the filling direction M3 in the enveloping rectangle with the smallest area of ​​the slice, such as Figure 4 As shown;

[0102] The number of long-path metals is k, which is an integer. In this embodiment, the component path is composed of a contour path and a bow path, so k>4;

[0103] The overlap between tracks α is the ratio of the overlap of the width of adjacent long tracks of metal M1 to the width of a complete long track of metal. To ensure sufficient fusion between adjacent long tracks of metal, avoid unfused defects between tracks, and avoid interlayer defects caused by excessive overlap, the range of α is 0.25≤α≤0.5.

[0104] S12. The minimum area enveloping rectangle in this embodiment is not a square, and the filling distance A has two values, namely, the short side A1 of the enveloping rectangle is 61 mm and the long side A2 is 111 mm. Figure 5 As shown, the filling direction of the nth deposition layer is parallel to the filling distance A1, and the filling direction of the (n+1)th deposition layer is parallel to the filling distance A2.

[0105] S13. For the nth deposition layer, set the number of long-side metal tracks k = 50, and the overlap between tracks α = 0.3. Based on the filling distance A1 = 61 mm, the required single-track deposited metal width w0 = 1.73 mm is calculated according to the above formula (1). The additive manufacturing equipment used can form a single-track deposited metal width ranging from 1.5 mm to 9.8 mm, so the bow path is applicable and the single-track deposited metal width is determined to be 1.73 mm.

[0106] S14. Determine the track spacing β of the long metal tracks of the nth deposition layer. Based on the set track overlap α = 0.3 and the calculated single track width w0 = 1.73 mm, calculate the track spacing β of the long metal tracks as 1.211 mm according to the above formula (2).

[0107] Furthermore, the parameter A' is set to the side length of the slice envelope rectangle parallel to the long metal of the deposition layer, that is, A2 = 111 mm; the parameter α is set to t Is the parameter of whether there is a contour path. Since it contains a contour path, α t The overlap between runs is α = 0.3. Parameter γ is the minimum ratio of β to the length of a single run of metal. Depending on the additive manufacturing equipment used, it is set to 1 / 4. If this ratio is exceeded, the first joint of adjacent runs of metal will be severely convex, resulting in a decrease in the flatness of the deposited layer. Subsequently, according to the above formula (3), β should be no greater than 26.7, which meets the requirements.

[0108] S15. Determine the number of long metal tracks k in the n+1th deposition layer. First, determine the track spacing β of the n+1th deposition layer according to the above formula (3) should be no greater than 14.2, which meets the requirements. Then set the floating-point parameter k0. According to β, w0 and A (A = A2 = 111 mm), calculate k0 = 90.23 according to the above formula (4). k0 contains the integer part k 0N =90 and the decimal part k 0F =0.23, where k 0F The proportion of the distance less than one full track pitch β to β is 23%, which satisfies the above formula (5) k = k 0N +2=92, that is, the number k of long metal tracks in the n+1th deposition layer is 92.

[0109] S16. Plan the path based on the parameters and execute additive manufacturing. The path parameters for the nth and n+1th layers are determined through S11 to S15. That is, the path parameters are transformed every other layer. This is input into the planning software to obtain the path code for each component deposition layer. This is output as G-code and imported into the machine tool equipment to execute additive manufacturing. A comparison of the flatness of the deposition layers obtained by trial and error in this embodiment and other processes is shown in Table 1 below. This embodiment can quickly obtain additive manufacturing deposition layers with high flatness and high profile accuracy.

[0110]

[0111]

[0112] Table 1

[0113] In Example 2:

[0114] Figure 6The component 3D model K1 of this embodiment is a regular rectangular thin plate with a thickness of 6 mm. The slice contour is the minimum area enveloping rectangle. The path parameter determination steps are as follows:

[0115] S21, define the components of the bow path and its basic parameters and ranges. Define the components of the bow path as follows Figure 3 As shown, it includes a long metal track M1 and a short metal track M2 connected at its ends, and the filling direction M3 of the bow path is perpendicular to the long metal track;

[0116] The basic parameters of the bow path include: filling distance A, the amount of metal in the long track k, and the overlap between tracks α;

[0117] The filling distance A is the length of the side parallel to the filling direction M3 in the enveloping rectangle with the smallest area of ​​the slice. The number of long-path metals is k, which is an integer. When the component path of this embodiment consists of a contour path and a bow path, k>4;

[0118] The overlap between tracks α is the ratio of the overlap of the width of adjacent long tracks of metal M1 to the width of a complete long track of metal. To ensure sufficient fusion between adjacent long tracks of metal, avoid defects of lack of fusion between tracks, and avoid interlayer defects caused by excessive overlap, the range of α is 0.25≤α≤0.5;

[0119] S22. Setting the bow filling directions of the nth deposition layer and the n+1th deposition layer.

[0120] The minimum area enveloping rectangle in this embodiment is not a square, and the filling distance A has two values, namely, the short side A1 of the enveloping rectangle is 6 mm and the long side A2 is 120 mm. Figure 7 As shown, the filling direction of the nth deposition layer is set to be parallel to the filling distance A1, and the filling direction of the n+1th deposition layer is set to be parallel to the filling distance A2;

[0121] S23. Determine a formable single-pass deposited metal width based on the nth deposition layer.

[0122] For the nth deposition layer, the number of long-side metal tracks is set to k = 6, and the overlap between tracks is α = 0.3. Based on the fill distance A1 = 6 mm, the required single-track metal deposition width w0 = 1.33 mm is calculated according to the above formula (1). The minimum single-track metal deposition width that can be formed by the additive manufacturing equipment used is 1.4 mm, so there is no need for process trial and error. Further parameters are selected: the number of long-side metal tracks is set to k = 5, and the overlap between tracks is α = 0.3. The required single-track metal deposition width w0 = 1.58 mm is calculated. The additive manufacturing equipment used can form a single-track metal deposition width range of 1.4 mm to 8.6 mm. Therefore, the bow path is applicable and the single-track metal deposition width is determined to be 1.58 mm.

[0123] S24. Determine the track spacing β of the long track metal of the nth deposition layer.

[0124] Based on the set overlap between tracks α = 0.3 and the calculated width of the single track deposited metal w0 = 1.58 mm, the track spacing β of the long track metal is calculated according to the above formula (2) = 1.11 mm. Furthermore, the parameter A' is set to the side length of the slice envelope rectangle parallel to the long track metal of the deposited layer, that is, A2 = 120 mm; the parameter α is set to t It is a parameter that characterizes whether there is a contour path. Since it contains a contour path, α t The overlap between runs, α, is 0.3. The parameter γ is the minimum ratio of β to the length of a single run of metal. Depending on the additive manufacturing equipment used, it is set to 1 / 4. Exceeding this ratio results in a severe bulge at the first joint of adjacent runs of metal, resulting in a decrease in the flatness of the deposited layer. Subsequently, according to equation (3), β should be no greater than 29.1, meeting the requirement.

[0125] S25. Determine the number k of long metal runs in the n+1th deposition layer. According to equation (3), the n+1th feed spacing β should be no greater than 0.552. If this requirement is not met, no process trial and error is required. Adjust the n+1th layer so that its path is completely consistent with the nth layer. The number k of long metal runs is also the same as the nth layer, which is 6 long metal runs. The filling direction is adjusted to be parallel to the filling distance A1.

[0126] S26. Plan the path based on the parameters and execute additive manufacturing. Steps S21 to S25 determine the path parameters for the nth and n+1th layers. That is, the path parameters are transformed every other layer. These are input into the planning software to obtain the path codes for each deposition layer of the component. These are then output as robot-readable src and dat file packages, which are then imported into the additive manufacturing equipment using the robot as the actuator. A comparison of the flatness of the deposition layers obtained by trial and error in this embodiment and other processes is shown in Table 2 below:

[0127]

[0128] Table 2

[0129] In summary, this embodiment can quickly obtain an additive manufacturing deposition layer with high flatness and high contour accuracy.

[0130] It should be noted that the above embodiments are only the best examples and are not intended to limit the implementation of the present application.

[0131] Furthermore, the present application also proposes a system for determining the parameters of a zigzag path for deposition-based additive manufacturing, which is applied to any embodiment of the method for determining the parameters of a zigzag path for deposition-based additive manufacturing. The zigzag path parameters include the width of a single track of deposited metal in the deposition layer of the component to be formed, the track spacing and number of long tracks of metal in the deposition layer, and the specific example is: Figure 8FIG. 1 is a functional module diagram of a system for determining bow path parameters for deposition-based additive manufacturing proposed in this application, including:

[0132] A parameter acquisition module 10 is used to acquire a filling distance of a first deposition layer and a filling distance of a second deposition layer of a component to be formed;

[0133] A first calculation module 20 is configured to determine a width of a single run of deposited metal in the first deposition layer based on a filling distance of the first deposition layer, a first number of long runs of metal in the first deposition layer, and a taper ratio between runs of the long runs of metal, wherein the long runs of metal are segments of the single run of deposited metal in the bow path excluding the head and tail connecting segments;

[0134] A second calculation module 30 is used to obtain the track spacing of the long tracks of the first deposition layer according to the width of the single track deposited metal and the ratio of the tower connection between the tracks;

[0135] The third calculation module 40 is configured to determine a second quantity of the long metal tracks of the second deposition layer based on the track spacing of the long metal tracks of the first deposition layer and the filling distance of the second deposition layer.

[0136] like Figure 9 As shown, an embodiment of the present application also provides an electronic device 300, including a processor 310, a memory 320, and a computer program 321 stored in the memory 320 and executable on the processor. When the processor 310 executes the computer program 321, the steps of the bow path parameter determination method for any of the above-mentioned deposition-type additive manufacturing are implemented.

[0137] Since the electronic device introduced in this embodiment is a device used to implement a method for determining the bow path parameters of a deposition-type additive manufacturing in the embodiment of this application, based on the method introduced in the embodiment of this application, technical personnel in this field can understand the specific implementation of the electronic device of this embodiment and its various variations. Therefore, how the electronic device implements the method in the embodiment of this application will not be introduced in detail here. As long as the equipment used by technical personnel in this field to implement the method in the embodiment of this application falls within the scope of protection of this application.

[0138] In the specific implementation process, the computer program 321 can be implemented when executed by the processor Figure 1 Any implementation manner in the corresponding embodiments.

[0139] It should be noted that, in the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.

[0140] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-readable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) that contain computer-readable program code.

[0141] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded computer, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0142] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0143] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0144] An embodiment of the present application also provides a computer program product, which includes computer software instructions. When the computer software instructions are executed on a processing device, the processing device executes the process of the method for determining the bow path parameters of deposition-type additive manufacturing.

[0145] A computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function according to the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that a computer can store or a data storage device such as a server or data center that includes one or more available media integrated. The available medium can be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid state drive (SSD)).

[0146] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0147] In the several embodiments provided in this application, it should be understood that the disclosed devices, apparatuses and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interface, device or unit, which can be electrical, mechanical or other forms.

[0148] Units described as separate components may or may not be physically separate, and components shown as units 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 these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0149] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0150] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0151] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

[0152] Although the preferred embodiments of this specification have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of this specification.

[0153] Obviously, those skilled in the art may make various changes and modifications to this specification without departing from the spirit and scope of this specification. Thus, if such changes and modifications fall within the scope of the claims of this specification and their equivalents, this specification is intended to include such changes and modifications.

Claims

1. A method for determining bow path parameters for deposition-based additive manufacturing, characterized in that: The parameters of the zigzag path include the width of a single track of deposited metal of the deposited layer of the component to be formed, the track spacing and number of long tracks of metal in the deposited layer, including: Obtaining a filling distance of a first deposition layer and a filling distance of a second deposition layer of a component to be formed; Determining a single-track width of the first deposition layer based on a filling distance of the first deposition layer, a first number of long tracks of metal in the first deposition layer, and a taper ratio between tracks of the long tracks of metal, wherein the long tracks of metal are single-track deposited metal segments excluding the head and tail connecting segments in the zigzag path; Obtaining a track pitch of long tracks of metal in the first deposition layer according to the width of the single track deposited metal and the ratio of the tower connections between tracks; A second quantity of the long track metal of the second deposition layer is determined based on the track pitch of the long track metal of the first deposition layer and the filling distance of the second deposition layer.

2. The method for determining the bow path parameters of deposition-based additive manufacturing according to claim 1, characterized in that: The obtaining of the filling distance of the first deposition layer and the filling distance of the second deposition layer of the component to be formed includes: Obtaining a slice profile of the component to be formed; Extracting the minimum area envelope rectangle of the slice contour; A filling distance of the first deposition layer and a filling distance of the second deposition layer are determined based on the minimum area envelope.

3. The method for determining the bow path parameters of deposition-based additive manufacturing according to claim 2, characterized in that: The determining, based on the minimum area envelope rectangle, a filling distance of the first deposition layer and a filling distance of the second deposition layer includes: The first and second deposition layers are arranged in a zigzag filling direction based on the minimum area envelope rectangle, wherein: if the minimum area envelope rectangle is a non-square, the first deposition layer is arranged in a zigzag filling direction parallel to the short side of the non-square, and the second deposition layer is arranged in a zigzag filling direction parallel to the long side of the non-square; if the minimum area envelope rectangle is a square, the first and second deposition layers are arranged in a zigzag filling direction parallel to the sides of the square; Based on the arc-shaped filling directions of the first deposition layer and the second deposition layer, a filling distance of the first deposition layer and a filling distance of the second deposition layer are determined.

4. The method for determining the parameters of the bow path in deposition-based additive manufacturing according to claim 3, wherein: The filling distance is used to represent the length of the side of the minimum area envelope rectangle that is parallel to the bow filling direction; and determining the filling distance of the first deposition layer and the filling distance of the second deposition layer based on the bow filling directions of the first deposition layer and the second deposition layer includes: If the minimum area envelope rectangle is a non-square, then based on the arc-shaped filling directions of the first deposition layer and the second deposition layer, the filling distance of the first deposition layer is determined to be the length of the short side of the non-square, and the filling distance of the second deposition layer is determined to be the length of the long side of the non-square; If the minimum area envelope rectangle is a square, the filling distances of the first deposition layer and the second deposition layer are determined to be the side length of the square based on the bow filling directions of the first deposition layer and the second deposition layer.

5. The method for determining the bow path parameters of deposition-based additive manufacturing according to claim 1, characterized in that: The width of a single deposited metal track of the first deposition layer is calculated by the following formula: Wherein, w0 is the width of a single deposited metal track of the first deposition layer, A is the filling distance of the first deposition layer, k is the first number of long tracks of metal in the first deposition layer, and α is the tower connection ratio between the long tracks of metal in the first deposition layer.

6. The method for determining the bow path parameters of deposition-based additive manufacturing according to claim 1, characterized in that: The determining, based on the track pitch of the long track metal of the first deposition layer and the filling distance of the second deposition layer, a second quantity of the long track metal of the second deposition layer includes: Performing a flatness check on the track spacing of the long track metal of the first deposition layer to obtain a check result; If the verification result does not meet the target requirement, the second quantity is the first quantity; If the verification result meets the target requirement, a floating-point parameter is obtained based on the filling distance of the second deposition layer, the width of the single-track deposited metal, and the track spacing of the long track metal of the first deposition layer, and the second quantity is determined according to the floating-point parameter.

7. The method for determining the bow path parameters of deposition-based additive manufacturing according to claim 6, characterized in that: The floating-point parameter includes an integer part value and a decimal part value, and determining the second quantity according to the floating-point parameter includes: If the product of the fractional part value and the track pitch of the long track metal of the first deposition layer meets a preset threshold, the second number is the sum of the integer part value and 2; If the product of the fractional part value and the track pitch of the long track metal of the first deposition layer does not meet the preset threshold, the second number is the sum of the integer part value and 1.

8. A system for determining bow path parameters for deposition-based additive manufacturing, applied to the method for determining bow path parameters for deposition-based additive manufacturing according to any one of claims 1 to 7, characterized in that: The parameters of the zigzag path include the width of a single track of deposited metal of the deposited layer of the component to be formed, the track spacing and number of long tracks of metal in the deposited layer, including: A parameter acquisition module, configured to acquire a filling distance of a first deposition layer and a filling distance of a second deposition layer of a component to be formed; a first calculation module, configured to determine a width of a single run of deposited metal in the first deposition layer based on a filling distance of the first deposition layer, a first number of long runs of metal in the first deposition layer, and a taper ratio between runs of the long runs of metal, wherein the long run of metal is a single run of deposited metal segment in the bow path excluding the head and tail connecting segments; a second calculation module, configured to obtain a track pitch of long tracks of metal in the first deposition layer according to the width of the single track deposited metal and the ratio of the tower connection between tracks; The third calculation module is configured to determine a second quantity of the long metal run of the second deposition layer based on the track spacing of the long metal run of the first deposition layer and the filling distance of the second deposition layer.

9. An electronic device comprising: A memory and a processor, wherein the processor is configured to implement the steps of the method for determining the bow path parameters of deposition-type additive manufacturing according to any one of claims 1 to 7 when executing a computer program stored in the memory.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for determining the bow path parameters of deposition-type additive manufacturing according to any one of claims 1 to 7 are implemented.

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