CN112045993B - Suspended part edge path construction method suitable for FFF rapid prototyping technology - Google Patents

Suspended part edge path construction method suitable for FFF rapid prototyping technology Download PDF

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CN112045993B
CN112045993B CN202010883316.5A CN202010883316A CN112045993B CN 112045993 B CN112045993 B CN 112045993B CN 202010883316 A CN202010883316 A CN 202010883316A CN 112045993 B CN112045993 B CN 112045993B
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path
condition
establishing
threshold value
route
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CN112045993A (en
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梁明一
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Southwest Jiaotong University
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/10—Processes of additive manufacturing
    • B29C64/106—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
    • B29C64/118—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using filamentary material being melted, e.g. fused deposition modelling [FDM]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/30—Auxiliary operations or equipment
    • B29C64/386—Data acquisition or data processing for additive manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/30—Auxiliary operations or equipment
    • B29C64/386—Data acquisition or data processing for additive manufacturing
    • B29C64/393—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y50/00—Data acquisition or data processing for additive manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y50/00—Data acquisition or data processing for additive manufacturing
    • B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes

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  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
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  • Optics & Photonics (AREA)
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Abstract

The invention discloses a suspended part edge path construction method suitable for an FFF (fringe field Filter) rapid forming technology, which solves the problems that the forming is difficult and the quality of a model is influenced by adding support because no direct support is arranged below a layer in a 3D printing and slicing method through the suspended part edge path construction. The invention does not need to increase the support, can effectively reduce the consumption of printing materials, shortens the printing time, improves the surface quality of the printing model, and has less influence on the function of the model under the condition of not removing redundant formed objects.

Description

Suspended part edge path construction method suitable for FFF rapid prototyping technology
Technical Field
The invention belongs to the technical field of 3D printing, and particularly relates to a suspended part edge path construction method suitable for an FFF rapid prototyping technology.
Background
In the existing FFF (Fused deposition modeling) 3D printing and slicing method, a processing method for a part without direct support below the image layer is generally to increase support, and is limited to the precision level of the existing FFF3D printing equipment and the complexity of the model, and the scheme has the defects of affecting the surface quality of the model, wasting time and more materials, being difficult to remove the support and the like.
Disclosure of Invention
Aiming at the defects in the prior art, the method for constructing the edge path of the suspended part, which is suitable for the FFF rapid prototyping technology, solves the problems in the prior art.
In order to achieve the purpose of the invention, the invention adopts the technical scheme that: a method for constructing a suspended part edge path suitable for an FFF rapid prototyping technology is characterized by comprising the following steps:
s1, collecting edge material forming position data of the suspended part of the model to be printed to obtain a plurality of target paths A;
s2, judging whether the graph surrounded by the target path A is convex or not, if so, executing the step of establishing the path, and entering the step S3, otherwise, executing the step of establishing the path B, and entering the step S4;
s3, judging whether the path meets the position condition of the path, if so, completing the construction of the edge path of the suspended part, otherwise, executing the step of establishing the path G, and completing the construction of the edge path of the suspended part;
s4, obtaining the path C by extending the path B or directly establishing a plurality of paths C, and checking whether the path C meets the position condition of the path C, if so, executing the step of establishing the path C, and entering the step S3, otherwise, executing the step of establishing the path C and the step of establishing the path C in sequence, and entering the step S3.
Further, the specific method of establishing the path in step S2 includes: setting a first distance threshold value E and a first included angle threshold value F, setting conditions that the minimum distance between a formed object of a route and a formed object of a certain target route A does not exceed the first distance threshold value E and the included angle does not exceed the first included angle threshold value F, and establishing the method according to the set conditions
Figure 930543DEST_PATH_IMAGE001
The length of the strip path is already long,
Figure 691826DEST_PATH_IMAGE001
representing a non-0 natural number.
Further, the specific method of establishing the path b in step S2 is as follows: setting the conditions that the pattern surrounded by the formed object of the path B and the formed object of the target path A is a plurality of convex shapes, and establishing the convex shapes according to the setting conditions
Figure 17765DEST_PATH_IMAGE002
The length of the strip of material is B,
Figure 180893DEST_PATH_IMAGE002
representing a non-0 natural number.
Further, the path location condition in step S3 includes a condition a, a condition B, and a third distance threshold B for condition determination, where the condition a specifically is: the minimum distance between the route-I molded object and other route molded objects except the target route A is smaller than a third distance threshold value B; the condition b is specifically as follows: the minimum distance between the route-shaped object and the fixed point D is smaller than a third distance threshold value B.
Further, the specific method for establishing the path step in step S3 is as follows: setting a fourth distance threshold C and a second included angle threshold G, setting a condition C, a condition d and a condition e, and establishing according to the set conditions
Figure 301296DEST_PATH_IMAGE003
A path G; each path G meets any 2 of the conditions c, d and e or meets the condition e for 2 times;
the condition c is specifically as follows: the minimum distance between the forming object of the path G and the forming object of a certain target path A is not more than a fourth distance threshold value C, and the included angle is not more than a second included angle threshold value G; the condition d is specifically as follows: the minimum distance between the route G molding object and the fixed point D is not more than a fourth distance threshold value C; the condition e is specifically as follows: the minimum distance between the forming object of a certain path G and the forming objects of other adjacent paths G does not exceed a fourth distance threshold value C.
Further, the step S3 includes the following sub-steps:
s31, judging whether the path meets the condition a and the condition b, if so, completing the construction of the edge path of the suspended part, otherwise, entering the step S32;
s32, judging whether the path meets the condition a or the condition b for 2 times, if so, completing the construction of the edge path of the suspended part, otherwise, entering the step S33;
and S33, executing a step of establishing a path G, and finishing the construction of the edge path of the suspended part.
Further, the path position condition in step S4 includes a condition f and a condition g, where the condition f specifically is: the minimum distance between the route C forming object and other route forming objects except the target route A is smaller than a third distance threshold value B; the condition g is specifically as follows: and the minimum distance between the route C molding and the fixed point D is less than a third distance threshold value B.
Further, the step of establishing the path in step S4 specifically includes: setting a condition h, a condition i and a condition j, and establishing the conditions according to the set conditions
Figure 815454DEST_PATH_IMAGE004
E, a path E; each path E meets any 2 of conditions h, i and j or meets 2 times of condition j, wherein
Figure 679505DEST_PATH_IMAGE004
Is a non-0 natural number;
the condition h is specifically as follows: the minimum distance between the forming object of the path E and the forming object of a certain path C is not more than a fourth distance threshold value C, and the included angle is not more than a second included angle threshold value G; the condition i is specifically as follows: the minimum distance between the route E forming object and the fixed point D is not more than a fourth distance threshold value C; the condition j is specifically as follows: the minimum distance between the molded object of the routing pentagon and the molded objects of other adjacent routing pentagons does not exceed a fourth distance threshold value C.
Further, the step S4 includes the following sub-steps:
s41, setting a fifth distance threshold value D, and setting that the minimum distance between the molded object of the path C and the molded object of the path B does not exceed the fifth distance threshold value D and the included angle does not exceed a second included angle threshold value G;
s42, according to the set condition of step S41, through prolonging
Figure 697139DEST_PATH_IMAGE005
Stripe B acquisition
Figure 988443DEST_PATH_IMAGE005
One path C or direct establishment
Figure 521056DEST_PATH_IMAGE005
A path C of
Figure 188797DEST_PATH_IMAGE005
Is a non-0 natural number;
s43, checking whether the path C meets the condition f and the condition g, if so, executing the step of establishing the path, and entering the step S3, otherwise, entering the step S44;
s44, checking whether the path C meets the condition f for 2 times or the condition g for 2 times, if so, executing the step of establishing the path, and entering the step S3, otherwise, executing the step of establishing the path E, and finishing the construction of the edge path of the suspended part.
The invention has the beneficial effects that:
(1) according to the invention, by constructing the edge path of the suspended part, the problem that the forming is difficult because no direct support is arranged below the layer in the 3D printing and slicing method is solved.
(2) The invention does not need to increase the support, can effectively reduce the consumption of printing materials and shorten the printing time.
(3) The invention can improve the surface quality of the printed model, and has little influence on the function of the model under the condition that redundant formed objects are not clear.
Drawings
Fig. 1 is a flowchart of a method for constructing a suspended portion edge path suitable for the FFF rapid prototyping technology according to the present invention.
Fig. 2 is a schematic diagram of the effect of the present invention on path modification.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1, a method for constructing a dangling portion edge path suitable for the FFF rapid prototyping technology includes the following steps:
s1, collecting edge material forming position data of the suspended part of the model to be printed to obtain a plurality of target paths A;
s2, judging whether the graph surrounded by the target path A is convex or not, if so, executing the step of establishing the path, and entering the step S3, otherwise, executing the step of establishing the path B, and entering the step S4;
s3, judging whether the path meets the position condition of the path, if so, completing the construction of the edge path of the suspended part, otherwise, executing the step of establishing the path G, and completing the construction of the edge path of the suspended part;
s4, obtaining the path C by extending the path B or directly establishing a plurality of paths C, and checking whether the path C meets the position condition of the path C, if so, executing the step of establishing the path C, and entering the step S3, otherwise, executing the step of establishing the path C and the step of establishing the path C in sequence, and entering the step S3.
The specific method of the step of establishing the path in the step S2 is as follows: setting a first distance threshold value E and a first included angle threshold value F, setting conditions that the minimum distance between a formed object of a route and a formed object of a certain target route A does not exceed the first distance threshold value E and the included angle does not exceed the first included angle threshold value F, and establishing the method according to the set conditions
Figure 795359DEST_PATH_IMAGE006
The length of the strip path is already long,
Figure 523144DEST_PATH_IMAGE006
representing a non-0 natural number.
The specific method for establishing the path b in step S2 is as follows: setting the conditions that the pattern surrounded by the formed object of the path B and the formed object of the target path A is a plurality of convex shapes, and establishing the convex shapes according to the setting conditions
Figure 543052DEST_PATH_IMAGE007
The length of the strip of material is B,
Figure 748906DEST_PATH_IMAGE007
representing a non-0 natural number.
The path position condition in step S3 includes a condition a, a condition B, and a third distance threshold B for condition determination, where the condition a specifically is: the minimum distance between the route-I molded object and other route molded objects except the target route A is smaller than a third distance threshold value B; the condition b is specifically as follows: the minimum distance between the route-shaped object and the fixed point D is smaller than a third distance threshold value B.
The specific method for establishing the path step in step S3 is as follows: setting a fourth distance threshold C and a second included angle threshold G, setting a condition C, a condition d and a condition e, and establishing according to the set conditions
Figure 475553DEST_PATH_IMAGE008
A path G; each path G meets any 2 of the conditions c, d and e or meets the condition e for 2 times;
the condition c is specifically as follows: the minimum distance between the forming object of the path G and the forming object of a certain target path A is not more than a fourth distance threshold value C, and the included angle is not more than a second included angle threshold value G; the condition d is specifically as follows: the minimum distance between the route G molding object and the fixed point D is not more than a fourth distance threshold value C; the condition e is specifically as follows: the minimum distance between the forming object of a certain path G and the forming objects of other adjacent paths G does not exceed a fourth distance threshold value C.
The step S3 includes the following sub-steps:
s31, judging whether the path meets the condition a and the condition b, if so, completing the construction of the edge path of the suspended part, otherwise, entering the step S32;
s32, judging whether the path meets the condition a or the condition b for 2 times, if so, completing the construction of the edge path of the suspended part, otherwise, entering the step S33;
and S33, executing a step of establishing a path G, and finishing the construction of the edge path of the suspended part.
The path c position condition in step S4 includes a condition f and a condition g, where the condition f specifically is: the minimum distance between the route C forming object and other route forming objects except the target route A is smaller than a third distance threshold value B; the condition g is specifically as follows: and the minimum distance between the route C molding and the fixed point D is less than a third distance threshold value B.
The step of establishing the path in step S4 specifically includes: setting a condition h, a condition i and a condition j, and establishing the conditions according to the set conditions
Figure 170977DEST_PATH_IMAGE009
E, a path E; each path E meets any 2 of conditions h, i and j or meets 2 times of condition j, wherein
Figure 615865DEST_PATH_IMAGE009
Is a non-0 natural number;
the condition h is specifically as follows: the minimum distance between the forming object of the path E and the forming object of a certain path C is not more than a fourth distance threshold value C, and the included angle is not more than a second included angle threshold value G; the condition i is specifically as follows: the minimum distance between the route E forming object and the fixed point D is not more than a fourth distance threshold value C; the condition j is specifically as follows: the minimum distance between the molded object of the routing pentagon and the molded objects of other adjacent routing pentagons does not exceed a fourth distance threshold value C.
The step S4 includes the following sub-steps:
s41, setting a fifth distance threshold value D, and setting that the minimum distance between the molded object of the path C and the molded object of the path B does not exceed the fifth distance threshold value D and the included angle does not exceed a second included angle threshold value G;
s42, according to the set condition of step S41, through prolonging
Figure 359830DEST_PATH_IMAGE010
Stripe B acquisition
Figure 268880DEST_PATH_IMAGE010
One path C or direct establishment
Figure 72888DEST_PATH_IMAGE010
A path C of
Figure 270651DEST_PATH_IMAGE010
Is a non-0 natural number;
s43, checking whether the path C meets the condition f and the condition g, if so, executing the step of establishing the path, and entering the step S3, otherwise, entering the step S44;
s44, checking whether the path C meets the condition f for 2 times or the condition g for 2 times, if so, executing the step of establishing the path, and entering the step S3, otherwise, executing the step of establishing the path E, and finishing the construction of the edge path of the suspended part.
In this embodiment, a strip-shaped molding is stretched from the nozzle of the FFF3D printer by the melted material having a certain viscosity, connecting a point 1 in the edge path with two other points 2 and 3 displaced from the point by less than an allowable amount during printing, wherein the point 1 is located between the points 2 and 3. Specifically, one or more paths are additionally established, so that the formed object of the path corresponds to the formed object which is in contact with a certain point of the target path in the just-printed model without further treatment, and at least two points of the formed object are attached to the model or one or more objects of which the relative distance from the model changes by no more than an allowable value in the printing process. The method specifically comprises the following steps:
a step of checking a path A: checking whether the graph surrounded by the target path A is convex (two points which are not directly connected but have a distance smaller than a set value A in the path are connected by default); if the result is negative, executing the step B of establishing the path; if yes, executing the step of establishing the path;
and B, path establishment step: establishing one or more paths B to convert the graph surrounded by the path forming object and the path forming object into a plurality of convex shapes (default two points which are not directly connected but have a distance smaller than a set value A in the path are connected);
and a step B of prolonging the path: extending one or more paths B to obtain a path C, or establishing one or more paths C, wherein the minimum distance between the formed object of the path C and the formed object of the path B is not more than a set value D, and the included angle is not more than a set value G;
and a step C of checking a path: checking whether the path C satisfies any one of the following two times or both: 1. whether the minimum distance from the path other than the path A is smaller than a set value B; 2. whether the minimum distance between the fixed point D and the fixed point D is smaller than a set value B or not; if the result is negative, executing the step of establishing the path E; if yes, executing the step of establishing the path;
and a path establishment step: establishing one or more path pentanes, wherein any path pentane satisfies any two or two of the following three paths: 1. the minimum distance between the forming object and the forming object of a certain path C is not more than a set value C, and the included angle is not more than a set value G; 2. the minimum distance between the forming object and the fixed point D is not more than a set value C; 3. the minimum distance between the formed object and the formed object of the adjacent path does not exceed a set value C;
a path establishing step: establishing one or more paths, wherein the minimum distance between the forming object of any path and the forming object of a certain path A does not exceed a set value E, and the included angle does not exceed a set value F;
a step of checking a path: checking whether the path satisfies any one of the following two times or both of the following two 1. the minimum distance from the path other than the path A is less than a set value B; 2. the minimum distance between the fixed point D and the fixed point D is less than a set value B; if the result is negative, executing the step of establishing the path G;
establishing a path step: establishing one or more paths G, wherein any one path G meets any two or two of the following requirements of a third path: 1. the minimum distance between the formed object and the formed object of a certain path A is not more than a set value C, and the included angle is not more than a set value G; 2. the minimum distance between the forming object and the fixed point D is not more than a set value C; 3. the minimum distance between the forming object and the adjacent forming object of the path heptad is not more than a set value C;
the fixed point is a point whose minimum distance from the model is smaller than the set value H, or whose minimum distance from an object whose relative distance from the model during printing does not vary more than an allowable value does not exceed the set value H.
Established as a behavior that generates a new path.
The action of changing the original path to extend at least one end of the formed object in the original path or establishing a new path, wherein the formed object in the path completely contains the formed object in the original path. The shaped object is an object produced by a machine according to a certain path. A path is data defining a material forming location. The allowable value is a predetermined value or a predetermined set of values. The set value is a predetermined value or a set of predetermined values.
As shown in fig. 2, path modification is performed on the print layer, and the added black lines in the figure are added paths.

Claims (1)

1. A method for constructing a suspended part edge path suitable for an FFF rapid prototyping technology is characterized by comprising the following steps:
s1, collecting edge material forming position data of the suspended part of the model to be printed to obtain a plurality of target paths A;
s2, judging whether the graph surrounded by the target path A is convex or not, if so, executing the step of establishing the path, and entering the step S3, otherwise, executing the step of establishing the path B, and entering the step S4;
s3, judging whether the path meets the position condition of the path, if so, completing the construction of the edge path of the suspended part, otherwise, executing the step of establishing the path G, and completing the construction of the edge path of the suspended part;
s4, obtaining a path C by extending the path B or directly establishing a plurality of paths C, and checking whether the path C meets the position condition of the path C, if so, executing a step of establishing the path C, and entering the step S3, otherwise, executing a step of establishing a path E and a step of establishing the path C in sequence, and entering the step S3;
the specific method of the step of establishing the path in the step S2 is as follows: setting a first distance threshold value E and a first included angle threshold value F, setting conditions that the minimum distance between a formed object of a route and a formed object of a certain target route A does not exceed the first distance threshold value E and the included angle does not exceed the first included angle threshold value F, and establishing L according to the set conditions1Path already, L1Represents a non-0 natural number;
the specific method for establishing the path b in step S2 is as follows: setting the conditions that the graph surrounded by the formed object of the path B and the formed object of the target path A is in a plurality of convex shapes, and establishing L according to the setting conditions2One path B, L2Represents a non-0 natural number;
the path position condition in step S3 includes a condition a, a condition B, and a third distance threshold B for condition determination, where the condition a specifically is: the minimum distance between the route-I molded object and other route molded objects except the target route A is smaller than a third distance threshold value B; the condition b is specifically as follows: the minimum distance between the forming object of the path and the fixed point D is smaller than a third distance threshold value B;
the specific method for establishing the path step in step S3 is as follows: setting a fourth distance threshold C and a second included angle threshold G, and setting a barC, d and e, establishing L according to the set conditions3A path G; each path G meets any 2 of the conditions c, d and e or meets the condition e for 2 times;
the condition c is specifically as follows: the minimum distance between the forming object of the path G and the forming object of a certain target path A is not more than a fourth distance threshold value C, and the included angle is not more than a second included angle threshold value G; the condition d is specifically as follows: the minimum distance between the route G molding object and the fixed point D is not more than a fourth distance threshold value C; the condition e is specifically as follows: the minimum distance between the forming object of a certain path G and the forming objects of other adjacent paths G does not exceed a fourth distance threshold value C;
the step S3 includes the following sub-steps:
s31, judging whether the path meets the condition a and the condition b, if so, completing the construction of the edge path of the suspended part, otherwise, entering the step S32;
s32, judging whether the path meets the condition a or the condition b for 2 times, if so, completing the construction of the edge path of the suspended part, otherwise, entering the step S33;
s33, executing the step of establishing a path G to finish the construction of the edge path of the suspended part;
the path c position condition in step S4 includes a condition f and a condition g, where the condition f specifically is: the minimum distance between the route C forming object and other route forming objects except the target route A is smaller than a third distance threshold value B; the condition g is specifically as follows: the minimum distance between the route C forming object and the fixed point D is smaller than a third distance threshold value B;
the step of establishing the path in step S4 specifically includes: setting a condition h, a condition i and a condition j, and establishing L according to the set conditions4E, a path E; each path E meets any 2 of conditions h, i and j or meets 2-time conditions j, and L4Is a non-0 natural number;
the condition h is specifically as follows: the minimum distance between the forming object of the path E and the forming object of a certain path C is not more than a fourth distance threshold value C, and the included angle is not more than a second included angle threshold value G; the condition i is specifically as follows: the minimum distance between the route E forming object and the fixed point D is not more than a fourth distance threshold value C; the condition j is specifically as follows: the minimum distance between the route E forming product and other adjacent route E forming products does not exceed a fourth distance threshold value C;
the step S4 includes the following sub-steps:
s41, setting a fifth distance threshold value D, and setting that the minimum distance between the molded object of the path C and the molded object of the path B does not exceed the fifth distance threshold value D and the included angle does not exceed a second included angle threshold value G;
s42, according to the condition set in the step S41, extending L5Path B acquires L5One path C or directly establishing L5One path C, said L5Is a non-0 natural number;
s43, checking whether the path C meets the condition f and the condition g, if so, executing the step of establishing the path, and entering the step S3, otherwise, entering the step S44;
s44, checking whether the path C meets the condition f for 2 times or the condition g for 2 times, if so, executing the step of establishing the path, and entering the step S3, otherwise, executing the step of establishing the path E, and finishing the construction of the edge path of the suspended part.
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Publication number Priority date Publication date Assignee Title
CN105904729A (en) * 2016-04-22 2016-08-31 浙江大学 Non-support three-dimensional printing method based on inclined layering
CN109808171A (en) * 2019-01-28 2019-05-28 杭州电子科技大学 A kind of 3D continuous path generation method towards Fused Deposition Modeling
CN110770005A (en) * 2017-06-27 2020-02-07 科思创德国股份有限公司 3D printing process with path control of printing path

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105904729A (en) * 2016-04-22 2016-08-31 浙江大学 Non-support three-dimensional printing method based on inclined layering
CN110770005A (en) * 2017-06-27 2020-02-07 科思创德国股份有限公司 3D printing process with path control of printing path
CN109808171A (en) * 2019-01-28 2019-05-28 杭州电子科技大学 A kind of 3D continuous path generation method towards Fused Deposition Modeling

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