CN110696368A - Control method for rotary nozzle of 3D printer - Google Patents
Control method for rotary nozzle of 3D printer Download PDFInfo
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- CN110696368A CN110696368A CN201910899645.6A CN201910899645A CN110696368A CN 110696368 A CN110696368 A CN 110696368A CN 201910899645 A CN201910899645 A CN 201910899645A CN 110696368 A CN110696368 A CN 110696368A
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- printing
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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
- B29C64/30—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
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- 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
Abstract
The invention provides a method for controlling a rotary nozzle of a 3D printer, which comprises the following steps: s2, obtaining a printing model, and cutting the printing model in layers to form a multi-layer layered model as a target model; s3, moving the target model to a printing platform in a three-dimensional coordinate system, and cutting the target model by concentric circles of circles where the rotation tracks of the printing spray head relative to the printing platform are located; s4, establishing a coordinate set aiming at each concentric circle intersected with the target model, and summarizing the coordinates of the points intersected with the target model on each concentric circle into the corresponding coordinate set; s5, sequentially selecting each coordinate set as an execution object, and linearly sliding the printing nozzle relative to the printing platform to a concentric circle corresponding to the execution object; and then controlling the printing nozzle to rotate to print the execution object. The invention can ensure the complete summarization of each printing point on the target model by dividing the target model through the concentric circles, thereby avoiding the loss of the printing points.
Description
Technical Field
The invention relates to the technical field of 3D printing, in particular to a control method for a rotary nozzle of a 3D printer.
Background
3D is the abbreviation of English "Three Dimensions", Chinese means Three-dimensional, namely length, width, height, it is a digitized stereoscopic technology based on computer, Internet. A3D printer using 3D technology features that the CAD data is used to stack and bond the cross sections of objects layer by special materials such as metal powder, ceramic powder, plastic powder and cell tissue through laser beam and hot-smelting nozzle, and then they are finally overlapped to form, printed out and made into object and model.
Because the printing forming process of the 3D printer can quickly, directly and accurately convert the three-dimensional CAD design drawing in the computer into a model without traditional tools, clamps and machine tools, even directly manufacture parts or dies, for example, the 3D printing technology is used for opening the die of a digital product, the printing of one die can be completed within a few hours, the development time from a plurality of products to the market is saved, the design and research and development period of the product can be effectively shortened, the efficiency is improved, and the production cost is reduced.
In the development prospect of 3D printing, it is very important to improve the printing precision and realize the printing of micro-miniature products, and this not only needs to improve the precision of printing equipment, but also needs to optimize the printing method.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a method for controlling a rotary nozzle of a 3D printer.
The invention provides a method for controlling a rotary nozzle of a 3D printer, which comprises the following steps:
s1, setting a printing platform and a printing nozzle, wherein the printing nozzle rotates relative to the printing platform and slides linearly along the radius of the circle where the rotating track is located; establishing a three-dimensional coordinate system, and modeling a printing platform and a printing nozzle in the three-dimensional coordinate system;
s2, obtaining the printing model, cutting the printing model layer by layer to form a multi-layer layered model, and obtaining each layered model from low to high one by one as a target model;
s3, moving the target model to a printing platform in a three-dimensional coordinate system, and cutting the target model by concentric circles of circles where the rotation tracks of the printing spray head relative to the printing platform are located;
s4, establishing a coordinate set aiming at each concentric circle intersected with the target model, and summarizing the coordinates of the points intersected with the target model on each concentric circle into the corresponding coordinate set;
s5, sequentially selecting each coordinate set as an execution object, and linearly sliding the printing nozzle relative to the printing platform to a concentric circle corresponding to the execution object; and then controlling the printing nozzle to rotate relative to the printing platform to print each coordinate point in the execution object.
Preferably, in step S1, the printing platform is horizontally and rotatably installed, the print head is linearly and movably installed on an installation surface parallel to a concentric circle where the rotation track of the printing platform is located, and the projection of the movement track of the print head on the rotation plane of the printing platform coincides with the radius of the concentric circle where the rotation track of the printing platform is located.
Preferably, in step S1, the print head is linearly slidably mounted on a link lever, the link lever is rotatably mounted, and the link lever extends in a radial direction of a rotation path of the link lever.
Preferably, in step S1, the printing platform is linearly slidably mounted on the support frame, the support frame is rotatably mounted, and the straight line where the printing platform linearly slides passes through the center point of the circle where the rotation track of the support frame is located. 5. The method for controlling the rotary nozzle of the 3D printer according to claim 1, wherein the three-dimensional coordinate system in step S1 uses the center of a circle where the rotation track of the printing platform is located as the origin.
Preferably, in step S4, the coordinate points in the coordinate set are arranged in order in the circumferential direction.
Preferably, the printing head further moves up and down relative to the printing platform in step S1, the step S3 further includes setting a height value of the printing head according to the height distance of the target model on the printing platform, and the step S5 first adjusts the position of the printing head in the vertical direction according to the height value before printing the coordinate set in each target model.
Preferably, in step S5, each coordinate set is sequentially selected as an execution object according to the sequence from inside to outside of the concentric circle.
Preferably, the specific manner of printing the execution object is as follows: the printing nozzle slides linearly to a concentric circle corresponding to an execution object relative to the printing platform, the current position coordinate of the printing nozzle is obtained, a coordinate point which is closest to the current position coordinate in the execution object is obtained and serves as an initial printing point, the rotating direction of the printing nozzle is determined according to the initial printing point, and the printing nozzle is rotated to print all the coordinate points in the execution object one by one.
Preferably, the specific manner of printing the execution object is as follows: presetting the rotation direction of the printing nozzle, linearly sliding the printing nozzle relative to the printing platform to a concentric circle corresponding to the execution object, and rotating the printing nozzle according to the preset rotation direction to print each coordinate point in the execution object one by one.
According to the control method for the rotary nozzle of the 3D printer, the printing nozzle can circularly rotate the printing platform in a passing manner and adjust the telescopic radius through linear motion to adjust the coordinate of the printing nozzle relative to the printing platform in a relative motion manner of the printing nozzle and the printing platform.
In the invention, firstly, the target model is divided by the concentric circles where the rotating tracks are located, then the printing points on a single concentric circle are printed, the printing points on one concentric circle are printed, and then the printing points on the next concentric circle are printed. Therefore, when an execution object is executed, the printing nozzle is firstly moved to the corresponding concentric circle in a straight line, and then the printing nozzle rotates relative to the printing platform, so that the printing of each coordinate point in the execution object can be completed quickly. Therefore, in the embodiment, by the aid of concentric circle cutting and the induction of the coordinate set, the printing points are imaged, the printing sequence is also determined, the movement of the printing nozzle relative to the printing platform is simplified, errors are reduced, and printing efficiency and precision are improved.
In the invention, the target model is divided by the concentric circles, so that the printing points on the target model can be completely summarized, the loss of the printing points is avoided, and the final printed product is ensured to be completely consistent with the printing model.
Drawings
Fig. 1 is a flowchart of a method for controlling a rotary nozzle of a 3D printer according to the present invention.
Detailed Description
Referring to fig. 1, the method for controlling the rotary nozzle of the 3D printer provided by the invention comprises the following steps:
s1, setting a printing platform and a printing nozzle, wherein the printing nozzle rotates relative to the printing platform and slides linearly along the radius of the circle where the rotating track is located; and establishing a three-dimensional coordinate system, and modeling the printing platform and the printing nozzle in the three-dimensional coordinate system. In this step, through the relative motion mode of printing shower nozzle and print platform to make the printing shower nozzle passable carry out the circular rotation and adjust the coordinate of printing the shower nozzle for print platform through linear motion to print platform.
During specific implementation, in this step, can set up the static installation of print platform, print shower nozzle rectilinear sliding's installation on the connecting rod, the connecting rod rotates the installation, and the connecting rod extends along its radius direction of rotation orbit to the rotation and the rectilinear sliding of realization printing shower nozzle. Or the printing nozzle is statically installed, the printing platform is installed on the support frame in a linear sliding mode, the support frame is installed in a rotating mode, the straight line where the printing platform slides linearly passes through the central point of the circle where the support frame rotates, and therefore rotation and linear sliding of the printing platform are achieved. Or the printing platform is horizontally and rotatably installed, the printing nozzle is linearly and movably installed on an installation surface parallel to a concentric circle where the rotation track of the printing platform is located, and the projection of the movement track of the printing nozzle on the rotation plane of the printing platform is superposed with the radius of the concentric circle where the rotation track of the printing platform is located, so that the printing nozzle can rotate relative to the printing platform and linearly slide along the radius of the circle where the rotation track is located. In the third embodiment, the printing nozzle and the printing platform move in a single direction, so that the stability and the accuracy of the movement are improved, and the precision of three-dimensional printing is improved.
And S2, obtaining the printing model, cutting the printing model layer by layer to form a multi-layer layered model, and obtaining the layered models one by one from low to high as target models. Specifically, in the present embodiment, the stamp model is cut in a three-dimensional coordinate system so as to acquire an accurate layered model.
And S3, moving the target model to a printing platform in a three-dimensional coordinate system, and cutting the target model by concentric circles of circles where the rotation tracks of the printing spray head relative to the printing platform are located.
S4, establishing a coordinate set for each concentric circle intersected with the target model, and summarizing the coordinates of the points intersected with the target model on each concentric circle into the corresponding coordinate set.
S5, sequentially selecting each coordinate set as an execution object, and linearly sliding the printing nozzle relative to the printing platform to a concentric circle corresponding to the execution object; and then controlling the printing nozzle to rotate relative to the printing platform to print each coordinate point in the execution object.
In this way, in the present embodiment, the target model is first divided by the concentric circles where the rotation trajectory is located, then the printing points on the single concentric circle are printed, and when the printing points on one concentric circle are printed, the printing points on the next concentric circle are printed. In this way, in the present embodiment, when executing an execution object, the print head is first moved linearly to the corresponding concentric circle, and then the print head is rotated relative to the print platform, so that the printing of each coordinate point in the execution object can be completed quickly. Therefore, in the embodiment, by the aid of concentric circle cutting and the induction of the coordinate set, the printing points are imaged, the printing sequence is also determined, the movement of the printing nozzle relative to the printing platform is simplified, errors are reduced, and printing efficiency and precision are improved.
In addition, in the embodiment, the target model is divided by concentric circles, so that the printing points on the target model can be completely summarized, the loss of the printing points is avoided, and the final printed product is completely consistent with the printing model.
In a further embodiment of the present invention, the three-dimensional coordinate system in step S1 uses the center of the circle where the rotation track of the printing platform is located as the origin to facilitate the sorting and execution of the coordinate set.
In a further embodiment of the present invention, the printing head further moves up and down relative to the printing platform in step S1, the step S3 further comprises setting a height value of the printing head according to the height distance of the target model on the printing platform, and the step S5 first adjusts the position of the printing head in the vertical direction according to the height value before printing the coordinate set in each target model. Therefore, in the embodiment, the vertical printing distance of each target model is accurately controlled, so that the controllability of the printing process is further improved, and errors are avoided.
In a further embodiment of the present invention, in step S4, the coordinate points in the coordinate set are arranged in order in the circumferential direction. Therefore, in the step S5, the printing of each coordinate point is sequentially completed in the rotation process of the printing nozzle relative to the printing platform, that is, the reciprocating motion of the printing nozzle is avoided for the printing of each coordinate set, the printing efficiency is further improved, and the printing quality is further improved by ensuring the stability of the unidirectional motion of the printing nozzle.
In a further embodiment of the present invention, in step S5, each coordinate set is sequentially selected as an execution object according to the sequence from inside to outside of the concentric circle. In this way, in the embodiment, each target model is printed from inside to outside, so that the flexibility of the printing work is improved, and the smooth execution of each printing point is favorably ensured.
In a further embodiment of the present invention, the specific manner of printing the execution object is: the printing nozzle slides linearly to a concentric circle corresponding to an execution object relative to the printing platform, the current position coordinate of the printing nozzle is obtained, a coordinate point which is closest to the current position coordinate in the execution object is obtained and serves as an initial printing point, the rotating direction of the printing nozzle is determined according to the initial printing point, and the printing nozzle is rotated to print all the coordinate points in the execution object one by one.
Alternatively, in the present invention, the specific manner of printing the execution object is: presetting the rotation direction of the printing nozzle, linearly sliding the printing nozzle relative to the printing platform to a concentric circle corresponding to the execution object, and rotating the printing nozzle according to the preset rotation direction to print each coordinate point in the execution object one by one.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention are equivalent to or changed within the technical scope of the present invention.
Claims (10)
1. A3D printer rotary nozzle control method is characterized by comprising the following steps:
s1, setting a printing platform and a printing nozzle, wherein the printing nozzle rotates relative to the printing platform and slides linearly along the radius of the circle where the rotating track is located; establishing a three-dimensional coordinate system, and modeling a printing platform and a printing nozzle in the three-dimensional coordinate system;
s2, obtaining the printing model, cutting the printing model layer by layer to form a multi-layer layered model, and obtaining each layered model from low to high one by one as a target model;
s3, moving the target model to a printing platform in a three-dimensional coordinate system, and cutting the target model by concentric circles of circles where the rotation tracks of the printing spray head relative to the printing platform are located;
s4, establishing a coordinate set aiming at each concentric circle intersected with the target model, and summarizing the coordinates of the points intersected with the target model on each concentric circle into the corresponding coordinate set;
s5, sequentially selecting each coordinate set as an execution object, and linearly sliding the printing nozzle relative to the printing platform to a concentric circle corresponding to the execution object; and then controlling the printing nozzle to rotate relative to the printing platform to print each coordinate point in the execution object.
2. The method for controlling the rotary nozzle of the 3D printer according to claim 1, wherein in step S1, the print head is horizontally and rotatably installed, the print head is linearly and movably installed on an installation surface parallel to a concentric circle on which the rotation track of the print head is located, and a projection of the movement track of the print head on the rotation plane of the print head coincides with a radius of the concentric circle on which the rotation track of the print head is located.
3. The 3D printer head rotation control method of claim 1, wherein in step S1, the print head is linearly slidably mounted on a link lever, the link lever is rotatably mounted, and the link lever extends along a radius direction of a rotation path of the link lever.
4. The method for controlling the rotary nozzle of the 3D printer according to claim 1, wherein in step S1, the printing platform is linearly slidably mounted on a support frame, the support frame is rotatably mounted, and a straight line along which the printing platform linearly slides passes through a center point of a circle along which a rotation track of the support frame is located.
5. The method for controlling the rotary nozzle of the 3D printer according to claim 1, wherein the three-dimensional coordinate system in step S1 uses the center of a circle where the rotation track of the printing platform is located as the origin.
6. The 3D printer rotational head control method of claim 5, wherein in step S4, the coordinate points in the coordinate set are arranged sequentially in a circumferential direction.
7. The 3D printer rotary nozzle control method of claim 1, wherein the printing nozzle further moves up and down with respect to the printing platform in step S1, the step S3 further comprises setting a height value of the printing nozzle according to a height distance of the target model on the printing platform, and the step S5 first adjusts a position of the printing nozzle in a vertical direction according to the height value before printing the coordinate set in each target model.
8. The 3D printer rotary nozzle control method according to any one of claims 1 to 7, characterized in that in step S5, each coordinate set is sequentially selected as an execution object according to the order from inside to outside of the concentric circle.
9. The method for controlling the rotary nozzle of the 3D printer according to claim 8, wherein the specific way of printing the execution object is as follows: the printing nozzle slides linearly to a concentric circle corresponding to an execution object relative to the printing platform, the current position coordinate of the printing nozzle is obtained, a coordinate point which is closest to the current position coordinate in the execution object is obtained and serves as an initial printing point, the rotating direction of the printing nozzle is determined according to the initial printing point, and the printing nozzle is rotated to print all the coordinate points in the execution object one by one.
10. The method for controlling the rotary nozzle of the 3D printer according to claim 8, wherein the specific way of printing the execution object is as follows: presetting the rotation direction of the printing nozzle, linearly sliding the printing nozzle relative to the printing platform to a concentric circle corresponding to the execution object, and rotating the printing nozzle according to the preset rotation direction to print each coordinate point in the execution object one by one.
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Cited By (3)
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| CN111452365A (en) * | 2020-03-24 | 2020-07-28 | 慧灵科技（深圳）有限公司 | Printing control method, controller, 3D printing system and storage medium |
| CN114119632A (en) * | 2021-11-12 | 2022-03-01 | 中国科学院空间应用工程与技术中心 | Rotary type slice segmentation method, system, controller and printer |
| WO2022077163A1 (en) * | 2020-10-12 | 2022-04-21 | 苏州美梦机器有限公司 | 3d printing device with extrusion port having variable size and control method for 3d printing device |
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Application publication date: 20200117 |