CN113987828B - Multi-energy-field additive manufacturing process planning method based on time sequence - Google Patents
Multi-energy-field additive manufacturing process planning method based on time sequence Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
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Abstract
The invention discloses a time sequence-based multi-energy field additive manufacturing process planning method, which comprises the steps of manufacturing layer by layer in the additive manufacturing process, and marking the molding layer number as L according to the sequence 1 ，L 2 ，L 3 ...L i ...L n (n is more than or equal to 1, i is more than or equal to 1 and is less than or equal to n), and the planning feature point of the corresponding Ln layer on the execution path is marked as P i1 ,P i2 ...P ij ...P im (n, m is more than or equal to 1, i is more than or equal to 1 and less than or equal to n, j is more than or equal to 1 and less than or equal to m); the time sequence corresponding to each path characteristic point is marked as t i1 ，t i2 ...t ij ...t im (n, m is more than or equal to 1, i is more than or equal to 1 and less than or equal to n, j is more than or equal to 1 and less than or equal to m); each characteristic point corresponds to a moment to form a printing area at the moment; at the j-th point of the additive manufacturing shaping i-th layer, according to a function f h (t nm ) And f b (t nm ) At the point corresponding to time t ij Function value f of (2) h (t ij ) And f b (t nm ) The height (h ij ) And width (b) ij ) And (5) performing adjustment compensation. The method comprises the step of combining the energy characteristic of the forming area and time to better realize the compensation of the evolution process of width and height along with time when the additive manufacturing process is planned.
Description
Technical Field
The invention relates to the technical field of additive manufacturing, in particular to a multi-energy field additive manufacturing process planning method based on time series.
Background
Additive manufacturing commonly known as 3D printing is widely applied to the fields of aviation, aerospace, medical treatment and the like at present, and three-dimensional forming of a specific part is realized by slicing and layering a target part and then manufacturing the target part layer by layer. For the additive manufacturing process of a specific part, firstly, process planning is required to be carried out on the part, namely, layering is carried out on the part by combining a specific process method, an execution path in each layer is planned, the final result of the process planning is a process file containing a certain sequence of points and process parameters, and then the additive manufacturing equipment reads and executes the planned process file, so that the manufacturing of the specific part is completed.
At present, a plurality of commercial process planning software are available at home and abroad, mainly aiming at the process planning of metal or nonmetal materials which are made of single materials and are solidified rapidly, the software generally assumes that the width and the height on a process path in additive manufacturing are consistent and stable in the planning process, and the cutting and the filling and the planning of an internal path are generally carried out only according to the geometric characteristics of parts, the fixed lap joint rate and the cooling time set by technicians and the like in the planning process. In practical application, the solidification or forming speed of the material is extremely high in the processes of laser additive manufacturing, photo-curing additive manufacturing and the like, and the parameter setting of the commercial process planning process is corrected after the relevant characteristic parameters are measured through a process test, so that the requirement of additive manufacturing process planning of the material can be basically met. However, when the cooling speed is low, the materials in the forming process volatilize slowly or the materials are synchronously added simultaneously, the existing planning method does not fully consider the distribution of time and energy fields, and meanwhile, the assumption of the path process is not established any more, so that the method is difficult to adapt to the additive manufacturing requirements of the materials.
In view of this, the present application is specifically proposed.
Disclosure of Invention
The invention aims to provide a novel multi-energy field additive manufacturing process planning method based on time sequences, which aims to solve the technical problems that the existing planning method is difficult to be suitable for the conditions of low cooling speed, slow volatilization of substances in the forming process, synchronous/simultaneous additive manufacturing of multiple materials and the like, process planning of the material forming process is processed into functions related to time parameters and energy field area characteristics through normalization, a height and width database or an accurate function based on the time is established according to the characteristics to realize path planning correction of designed parts, and the additive manufacturing process planning of related parts is well solved.
The invention is realized by the following technical scheme:
multi-energy field additive manufacturing process planning method based on time sequence, wherein the multi-energy field additive manufacturing process is manufactured layer by layer in the additive manufacturing process, and the molding layer number is marked as L in sequence 1 ，L 2 ，L 3 ...L i ...L n (n is more than or equal to 1, i is more than or equal to 1 and is less than or equal to n), and the planning feature point of the corresponding Ln layer on the execution path is marked as P i1 ,P i2 ...P ij ...P im (n, m is more than or equal to 1, i is more than or equal to 1 and less than or equal to n, j is more than or equal to 1 and less than or equal to m); the time sequence corresponding to each path characteristic point is marked as t i1 ，t i2 ...t ij ...t im (n, m is more than or equal to 1, i is more than or equal to 1 and less than or equal to n, j is more than or equal to 1 and less than or equal to m); each characteristic point corresponds to a moment to form a printing area at the moment; at the j-th point of the additive manufacturing shaping i-th layer, according to a function f h (t nm ) And f b (t nm ) At the point corresponding to time t ij Function value f of (2) h (t ij ) And f b (t nm ) The height (h ij ) And width (b) ij ) And (5) performing adjustment compensation.
In the simultaneous additive manufacturing of multiple energy fields or multiple materials, the energy areas are marked as A in sequence according to the printing areas 1 ，A 2 。..A u ...A q (q≥1,1≤u≤q)，
At the j-th point of the additive manufacturing shaping i-th layer, according to a function f h (t nm ,A q ) And f b (t nm ,A q ) At the point corresponding to time t ij Function value f of (2) h (t ij ,A u ) And f b (t ij ,A u ) The height (h ij ) And width (b) ij ) And (5) performing adjustment compensation.
After the height value is compensated, planning layer L i Height Z of (2) i Changing, setting the change value as Deltazi, and planning the layer L by the standard slice i The corresponding area to be planned actually is Z i The corresponding part position after the step of forming Sigma Delta zi, the process planning plans the planned layer L for the original standard slice 1 ，L 2 ，L 3 ...L i -1，L i-2 Re-planning is performed and a new planning layer path is formed.
The function f of the invention h (t nm ) And f b (t nm ) And f h (t nm ，A q ) And f b ((t nm ，A q ) The function is related to the time and energy field characteristics only, and the functions of the different energy fields of different materials are also changed, so that a uniform form cannot be constructed for a large class of materials, and the uniform form needs to be constructed by a process test alone, but the characteristics can be clear, firstly, the functions are piecewise nonlinear functions, and the L-th function is adopted i The last k points of the layer are segmented (the specific value of k varies from material to material, but certainly exists); wherein the characteristic point P ik To the characteristic point P im When the path is planned, the height coordinates of all the characteristic point coordinates in the interval are positioned at L i Layer (actual planning layer after height correction, its height position is Z i - ΣΔzi), the characteristic point P i1 To the characteristic point P i(k-1) When the path of the section is planned, the height coordinates in all the characteristic point coordinates in the section are L after planning i Within the height of the layer and of uniform value (the interval being the height position Z i Vicinity of sigma deltazi).
According to the characteristics, f can be completed by establishing a certain process test h (t nm ) And f b (t nm ) And f h (t nm ，A q ) And f b ((t nm ，A q ) From the construction of (a)And the process of additive manufacturing of the energetic material is planned more accurately or the additive manufacturing process is compensated more accurately, so that the accurate manufacturing of the finally printed part is ensured.
Function f h (t nm ,A q ) And f b (t nm ,A q ) Including lap rate parameters and interlayer cooling parameters in the process planning.
The multi-energy field is a light field, a thermal field, an electric arc field and an adhesive concentration field, different materials can be arranged according to energy characteristics to perform synchronous/simultaneous additive manufacturing of multiple materials in different energy areas, and the process execution of the synchronous/simultaneous additive manufacturing is still carried out according to f h (t ij ，A u ) And f b (t nm ,A u ) Planning the correction compensation of the planned path point and establishing different f along with different parts h (t nm ，A q ) And f b ((t nm ，A q )。
The invention is based on the prior art planning method, the time characteristic of the path characteristic points is included, and the compensation of the integral macroscopic forming size in the additive manufacturing process is realized from the compensation of each microcosmic point; the fact that the same energy mode or different energy modes in different additive manufacturing modes are used for additive manufacturing in adjacent spaces is further considered, and the fact that the energy characteristics of the forming area are mutually combined with time is better achieved, so that the evolution process of width and height along with time is compensated when the additive manufacturing process is planned.
The invention relates to a multi-energy field additive manufacturing planning method based on time sequence, which is mainly used for material forming with lower cooling speed, slow volatilization forming of forming process substances, synchronous or simultaneous additive adding of heterogeneous materials in different energy areas and manufacturing process of adhesive solidification bonding additive, wherein the process planning of the material forming process can be normalized into a function with time parameters related to the characteristics of the energy field areas, and a process database or an accurate function is established according to the characteristics to realize path planning correction of design parts.
The method solves the process planning problems of energy-containing material additive manufacturing, solvent volatilization and solidification and heterogeneous material synchronous additive manufacturing, and can be established and controlled according to the method of the patent through a certain process test and has a general process planning algorithm or process compensation method.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the time series-based multi-energy field additive manufacturing process planning method provided by the embodiment of the invention comprises the steps of incorporating the time characteristics of the path characteristic points, and realizing the compensation of the integral macroscopic forming size in the additive manufacturing process from the compensation of each microcosmic point; the fact that the same energy mode or different energy modes in different additive manufacturing modes are used for additive manufacturing in adjacent spaces is further considered, and the fact that the energy characteristics of a forming area are mutually combined with time is better achieved, so that the evolution process of width and height along with time is compensated when the additive manufacturing process is planned;
2. according to the multi-energy field additive manufacturing process planning method based on the time sequence, in the additive manufacturing process of powder forming, energy-containing material melt extrusion forming, wire melt extrusion forming, arc field heterogeneous material synchronous forming and the like by using the binder, a time-based height and width supplement database and a planning reference function are established by controlling the action of an energy region, so that the additive manufacturing process planning of related parts is well solved;
3. the multi-energy field additive manufacturing process planning method based on the time sequence provided by the embodiment of the invention can carry out more accurate process planning for the situations such as energy-containing material additive manufacturing, multi-head parallel heterogeneous material manufacturing, multi-energy field heterogeneous material manufacturing and the like, indicates the function characteristics and the method for establishing the function for the method, can greatly reduce the process test times, guides the process research such as energy-containing material additive manufacturing, multi-head parallel heterogeneous material manufacturing and multi-energy field heterogeneous material manufacturing and realizes the final part manufacturing.
Drawings
In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the drawings that are needed in the examples will be briefly described below, it being understood that the following drawings only illustrate some examples of the present invention and therefore should not be considered as limiting the scope, and that other related drawings may be obtained from these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of slice layering, layer number definition and height variation definition of each layer of an additive manufacturing process according to an embodiment of the present invention;
fig. 2 is a schematic diagram of path planning feature points in each layer after layering of an additive manufacturing slice and a time definition of the feature points when printing, according to an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating the definition of the distribution of horizontal circular areas of a multi-energy field according to an embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating the definition of the vertical distribution of the multi-energy field region according to the embodiment of the present invention;
FIG. 5 is a schematic diagram of the operation of an embodiment of the present invention when using dual head printing of energetic materials;
FIG. 6 is a schematic diagram of a multi-head spin build multi-energy field additive manufacturing heterogeneous materials provided by an embodiment of the present invention;
fig. 7 is a schematic diagram illustrating segmentation of the segment compensation function in a same layer of programming according to an embodiment of the present invention.
Detailed Description
For the purpose of making apparent the objects, technical solutions and advantages of the present invention, the present invention will be further described in detail with reference to the following examples and the accompanying drawings, wherein the exemplary embodiments of the present invention and the descriptions thereof are for illustrating the present invention only and are not to be construed as limiting the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to one of ordinary skill in the art that: no such specific details are necessary to practice the invention. In other instances, well-known structures, circuits, materials, or methods have not been described in detail in order not to obscure the invention.
Throughout the specification, references to "one embodiment," "an embodiment," "one example," or "an example" mean: a particular feature, structure, or characteristic described in connection with the embodiment or example is included within at least one embodiment of the invention. Thus, the appearances of the phrases "in one embodiment," "in an example," or "in an example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, or characteristics may be combined in any suitable combination and/or sub-combination in one or more embodiments or examples. Moreover, those of ordinary skill in the art will appreciate that the illustrations provided herein are for illustrative purposes and that the illustrations are not necessarily drawn to scale. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
In the description of the present invention, the terms "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "high", "low", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the scope of the present invention.
Example 1
As shown in fig. 1 to 4, the marks used in the present invention are defined and described according to the technical characteristics of additive manufacturing, the molding layer number is generated according to the part model in the slicing process, the subsequent compensation in the process planning method of the present invention can substantially change the layering layer number and the height position of the layer currently printed, and the description marks the layering as L according to the sequence for convenience of description under the condition that the parts are still printed layer by layer according to the part characteristics and the parts without height crossing between the layers 1 ，L 2 ，L 3 ...L i ...L n (n is more than or equal to 1, i is more than or equal to 1 and is less than or equal to n), and the corresponding L i Layer planning feature point on execution path is marked as P i1 ,P i2 ...P ij ...P im (n，m≥1,1≤i≤n,1≤j≤m); the time sequence corresponding to each path characteristic point is marked as t i1 ，t i2 ...t ij ...t im (n, m is more than or equal to 1, i is more than or equal to 1 and less than or equal to n, j is more than or equal to 1 and less than or equal to m); the printing action area at the moment is formed at the moment corresponding to each characteristic point, and the area is a multi-energy intensity distribution field and can be marked as A according to the intensity of energy distribution 1 ，A 2 。..A u ...A q (q is more than or equal to 1, u is more than or equal to 1 and is less than or equal to q), wherein the schematic diagram is formed by dividing concentric circle areas from inside to outside (figure 3) or stripe-shaped adjacent areas (figure 4); when printing arbitrary layers, e.g. L i The j-th point of the layer is at the height (h) on the single path when the additive manufacturing is formed and the path is planned ij ) And width (b) ij ) According to the corresponding time t of the point ij Function value f of (2) h (t ij ) And f b (t ij ) Make adjustments and the function changes as the printing area of the additive process is selected, the layer L is typically planned after the height value is compensated i Height Z of (2) i Will change, set the change value as Deltazi, corresponding to the standard slice planning layer L i The corresponding area to be planned actually is Z i The corresponding part position after the step of sigma delta zi is used for planning the process, and the planned layer (such as L) i -1，L i-2 Etc.) to re-plan and form a new planned layer path.
Further, in the case of multi-head side-by-side additive manufacturing, multiple energy fields or multiple materials may occur, at which time the height (h ij ) And width (b) ij ) According to the corresponding function value f h (t ij ，A u ) And f b (t ij ,A u ) The change is carried out to protect the problem of asynchronous time evolution caused by the characteristic of the energy area, the compensation function at the moment is changed, the lap rate parameter and the interlayer cooling parameter in the normal standard process planning process are also reflected in the function value, the values in the normal slicing software are generally fixed values, but the values in the method are changed along with the change of the time t and the energy area A, namely the height (h ij ) And width (b) ij ) The compensation of (2) is only related to the time and energy fields, and the functions of the different energy fields of different materials are also changed, and the compensation is needed to be independently constructed through process tests.
In connection with the above description, the function f h (t nm ) And f b (t nm ) And f h (t nm ，A q ) And f b (t nm ,A q ) The uniform form cannot be constructed for a large class of materials, but its characteristics are clear, firstly they are piecewise nonlinear functions, and in the L < th ] i The last k points of the layer are segmented (the specific value of k varies from material to material, but certainly exists); wherein the characteristic point P ik To the characteristic point P im When the path is planned, the height coordinates of all the characteristic point coordinates in the interval are positioned at L i Layer (actual planning layer after height correction, its height position is Z i - ΣΔzi), the characteristic point P i1 To the characteristic point P i(k-1) When the path of the section is planned, the height coordinates in all the characteristic point coordinates in the section are L after planning i Within the height of the layer and of uniform value (the interval being the height position Z i Vicinity of sigma deltazi).
The multi-energy field is light field, thermal field, electric arc field, adhesive concentration field, etc., and the different energy areas A 1 ，A 2 。..A u ...A q (q is more than or equal to 1, u is more than or equal to 1 and q is more than or equal to 1), synchronous (simultaneous) additive manufacturing of multiple materials can be carried out in different energy areas by arranging different materials according to energy characteristics, and the process execution of the synchronous (simultaneous) additive manufacturing is still carried out according to f h (t ij ，A u ) And f b (t nm ,A u ) Planning the correction compensation of the planned path point and establishing different f along with different parts h (t nm ，A q ) And f b (t nm ,A q ) A function.
The multi-energy field additive manufacturing path planning method based on the time sequence is mainly used for material forming with low cooling speed, slow volatilization forming of forming process substances, synchronous/simultaneous additive adding of heterogeneous materials in different energy areas, adhesive solidification and adhesion additive manufacturing processes and the like, and the process planning of the material forming process can be normalized into a function with time parameters related to the characteristics of the energy field areas, and a process database or an accurate function is established according to the characteristics to realize path planning correction of designed parts.
Example 2
In the present embodiment, as shown in fig. 1 to 5 and 7, the present invention is described by taking the process scheme of the additive manufacturing process of the energetic material as an example, in the process of adding the energetic material such as the propellant, a certain proportion of solvent and propellant are mixed to form a glue raw material with a certain viscosity but low sensitivity, then the mixed raw material is extruded to a dark color substrate as shown in fig. 1 through one or two heads (different concentration ratios or different raw materials) by using a feeding mode as shown in fig. 5, and then the mixed raw material is layered according to a pre-programmed mode such as L 1 ，L 2 ，L 3 ...L i ...L n (n is greater than or equal to 1,1 is greater than or equal to i is greater than or equal to n), but in the printing process, due to the slow volatilization of the solvent and the high viscosity, the height of the first layer is reduced by Deltaz after the first layer is printed 1 But when the second layer is completed, the height of the second layer is also reduced by Δz 2 While the first layer is still in a process of variation, Δz, which will be the next at this time 1 The height of each layer is in evolution in the whole printing process and is stable after a certain number of layers are reached unlike the traditional metal additive manufacturing process; to each layer, e.g. L i Layer, set the characteristic point of the printing process as P i1 ,P i2 ...P ij ...P im (n, m is more than or equal to 1, i is more than or equal to 1 and less than or equal to n, j is more than or equal to 1 and less than or equal to m); the time sequence corresponding to each path characteristic point is marked as t i1 ，t i2 ...t ij ...t im (n, m is more than or equal to 1, i is more than or equal to 1 and less than or equal to n, j is more than or equal to 1 and less than or equal to m); at this time, the height (h ij ) And width (b) ij ) Will also be as high as the layer height over time t ij And then evolves.
If the process parameters and paths of the additive manufacturing process are planned according to conventional process planning software or standard commercial additive manufacturing process planning software, the final manufactured part will be very different from the designed part, even if printing fails.
The invention introduces a function f h (t nm ) And f b (t nm ) And f h (t nm ，A q ) And f b (t nm ，A q ) Iterative compensation is performed on paths in the additive manufacturing process of energetic materials to achieve repeated layering and iterative process planning in height, either point or layer-to-layer. The function f is used when the printhead is a single stable energy source or stable adhesion h (t nm ) And f b (t nm ) When the printhead uses multiple heads or materials, f is required h (t nm ，A q ) And f b (t nm ，A q )。
The compensation function is established by first grasping its characteristics and establishing a corresponding database using process tests. Through test verification, the invention defines several characteristics of the compensation function, namely, the function is only related to time and energy field characteristics under the condition of a certain material, and the function is a piecewise function in each layer, as shown in fig. 7, that is, in a single layer, there is necessarily one point dividing the print head path gauge in the same layer into two parts and is in k points before the end point, and the main characteristics of the second half piecewise function are that the change in height is inconsistent with the characteristics of the previous section function. According to the two characteristics, a certain process test can be established to finish the process of f h (t nm ，A q ) And f b (t nm ，A q ) The construction of the material additive manufacturing system can complete more accurate planning of the process of the material additive manufacturing of the energetic material or more accurate compensation control of the material additive manufacturing process, and ensure the accurate manufacturing of the finally printed parts.
Example 3
As shown in fig. 1 to 7, the present embodiment employs multi-head rotation to build multi-energy field additive manufacturing of heterogeneous materials, with the print head of material a positioned to print a point such as P ij Center of (2)Where another material B is located at its central edge, as shown in connection with fig. 4, the printhead can also be replaced by a different energy field meaning as shown and in a different energy field area a q And placing different materials for synchronous additive manufacturing. In this embodiment, the process planning of the final formed part fails due to different properties (such as different volatilization and bonding times caused by different concentrations, different melting and solidification times caused by different melting points, etc.) of the material a and the material B, and the designed part cannot be manufactured correctly.
The method according to the present invention can be applied to the method shown in the present embodiment 2 by establishing f h (t nm ，A q ) And f b (t nm ，A q ) And (3) correcting the process path and the planning method of the designed part. The method can greatly reduce the process test times and bring about a repeatable process planning compensation function, but the function can be reestablished due to different materials and process systems.
The multi-energy field additive manufacturing process planning method based on the time sequence can carry out more accurate process planning for the situations such as energy-containing material additive manufacturing, multi-head parallel heterogeneous material manufacturing, multi-energy field heterogeneous material manufacturing and the like, indicates function characteristics for establishing the method and establishes the function.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the invention, and is not meant to limit the scope of the invention, but to limit the invention to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (6)
1. Multi-energy field additive manufacturing process planning based on time sequenceThe method comprises the steps of manufacturing the additive layer by layer in the additive manufacturing process, and marking the molding layer number as L according to the sequence 1 ，L 2 ，L 3 ...L i ...L n (n is more than or equal to 1, i is more than or equal to 1 and is less than or equal to n), and the planning feature point of the corresponding Ln layer on the execution path is marked as P i1 ,P i2 ...P ij ...P im (n, m is more than or equal to 1, i is more than or equal to 1 and less than or equal to n, j is more than or equal to 1 and less than or equal to m); the time sequence corresponding to each path characteristic point is marked as t i1 ，t i2 ...t ij ...t im (n, m is more than or equal to 1, i is more than or equal to 1 and less than or equal to n, j is more than or equal to 1 and less than or equal to m); each characteristic point corresponds to a moment to form a printing area at the moment, and is characterized in that:
at the j-th point of the additive manufacturing shaping i-th layer, according to a function f h (t nm ) And f b (t nm ) At the point corresponding to time t ij Function value f of (2) h (t ij ) And f b (t nm ) The height (h ij ) And width (b) ij ) Performing adjustment compensation;
wherein the function f h (t nm ) And f b (t nm ) The following characteristics are satisfied,
function f h (t nm ) And f b (t nm ) Are piecewise nonlinear functions and change along with the selection of the printing area of the material adding process, and take the L < th + > as i The last k points of the layer are used as segments;
for the L th i Last k feature points P of a layer ik To the characteristic point P im When the path is planned, the height coordinates of all the characteristic points in the interval are positioned at L i In the interval range outside the layer height, the characteristic point P i1 To the characteristic point P i(k-1) When the path of the section is planned, the height coordinates of all the characteristic points in the section are L after planning i The layers are within the height and equal in value;
in the simultaneous additive manufacturing of multiple energy fields or multiple materials, the energy areas are marked as A in sequence according to the printing areas 1 ，A 2 ...A u ...A q (q≥1,1≤u≤q)，
At the j-th point of the additive manufacturing shaping i-th layer, according to a function f h (t nm ,A q ) And f b (t nm ,A q ) At the point corresponding to time t ij Function value f of (2) h (t ij ,A u ) And f b (t ij ,A u ) The height (h ij ) And width (b) ij ) Performing adjustment compensation;
function f h (t nm ,A q ) And f b (t nm ,A q ) The following characteristics are satisfied,
function f h (t nm ,A q ) And f b (t nm ,A q ) Is also a piecewise nonlinear function and changes with the selection of the printing region of the additive process, and takes the L < th) i The last k points of the layer are used as segments;
for the L th i Last k feature points P of a layer ik To the characteristic point P im When the path is planned, the height coordinates of all the characteristic points in the interval are positioned at L after planning i In the interval range outside the layer height, the characteristic point P i1 To the characteristic point P i(k-1) When the path of the section is planned, the height coordinates of all the characteristic points in the section are L after planning i The layers are within the height and equal in value;
in the case of a material, the function f h (t nm ,A q ) And f b (t nm ,A q ) Only with respect to time and energy fields.
2. The time series based multi-energy field additive manufacturing process planning method of claim 1, wherein the function f h (t nm ,A q ) And f b (t nm ,A q ) Including lap rate parameters and interlayer cooling parameters in the process planning.
3. The time series-based multi-energy field additive manufacturing process planning method according to claim 1, wherein the layer L is planned after the height value is compensated i Height Z of (2) i Changing, setting the change value as Deltazi, and planning the layer L by the standard slice i Corresponding toIs Z i The corresponding part position after the step of forming Sigma Delta zi, the process planning plans the planned layer L for the original standard slice 1 ，L 2 ，L 3 ...L i-1 ，L i-2 Re-planning is performed and a new planning layer path is formed.
4. The time series-based multi-energy field additive manufacturing process planning method of claim 1, wherein the multi-energy field is a light field, a thermal field, an arc field, an adhesive concentration field.
5. The time series-based multi-energy field additive manufacturing process planning method according to claim 1, wherein the process planning method is used for manufacturing processes of material forming with low cooling speed, slow volatilization of forming process substances, synchronous or simultaneous additive addition of heterogeneous materials in different energy areas and adhesive solidification and adhesion additive.
6. The time series based multi-energy field additive manufacturing process planning method of claim 1, wherein the specific value of k varies from one additive material to another.
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