CN112078129B - Part printing method and system, terminal equipment and computer storage medium - Google Patents
Part printing method and system, terminal equipment and computer storage medium Download PDFInfo
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- CN112078129B CN112078129B CN202010935298.0A CN202010935298A CN112078129B CN 112078129 B CN112078129 B CN 112078129B CN 202010935298 A CN202010935298 A CN 202010935298A CN 112078129 B CN112078129 B CN 112078129B
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- 238000000034 method Methods 0.000 title claims abstract description 50
- 238000003860 storage Methods 0.000 title claims abstract description 25
- 238000003754 machining Methods 0.000 claims abstract description 31
- 238000007648 laser printing Methods 0.000 claims abstract description 12
- 238000004891 communication Methods 0.000 claims description 33
- 238000012545 processing Methods 0.000 claims description 27
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- 238000010146 3D printing Methods 0.000 abstract description 18
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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
- B29C64/141—Processes of additive manufacturing using only solid materials
- B29C64/153—Processes of additive manufacturing using only solid materials using layers of powder being selectively joined, e.g. by selective laser sintering or melting
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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
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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
- B33Y10/00—Processes of 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
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
The invention discloses a part printing method and system, terminal equipment and a computer storage medium, and relates to the technical field of three-dimensional printing, so that the arc-shaped contour of a printed part meets the requirement of machining allowance, the contour of the printed part is corrected by machining equipment conveniently, and the precision of the part is improved. The part printing method includes: receiving modeling information of a part; determining a laser scanning path according to the modeling information of the part; and controlling the laser printing equipment according to the laser scanning path, and printing the arc-shaped outline of the part along the tangent line segment of the arc-shaped outline of the part, so that the arc-shaped outline of the part meets the requirement of machining allowance. The terminal equipment is used for executing the part printing method. The part printing method provided by the invention is used for printing the part with the arc-shaped outline.
Description
Technical Field
The invention relates to the technical field of three-dimensional printing, in particular to a part printing method and system, terminal equipment and a computer storage medium.
Background
Three-dimensional printing is a technique for constructing objects by layer-by-layer printing using a bondable material in powder form based on a digital model file. Specifically, three-dimensional printing is generally modeled by computer modeling software, then the built three-dimensional model is sliced and partitioned into sections layer by layer, and the three-dimensional printing equipment is guided to print layer by layer according to a laser scanning path, so that the object is rapidly molded.
In the three-dimensional printing process, the laser scanning path directly influences the organization structure of the processed part. However, the laser scanning path obtained by the existing filling path processing method cannot meet the filling processing requirement of the part with the arc-shaped profile, so that the arc-shaped profile of the part obtained by the existing filling path processing method cannot meet the requirement of the machining allowance, and the subsequent correction of the profile of the part by the machining equipment after the three-dimensional printing is completed is not facilitated, so that the precision of the part is poor.
Disclosure of Invention
The invention aims to provide a part printing method and system, a terminal device and a computer storage medium, so that the arc-shaped contour of a printed part meets the requirement of machining allowance, the contour of the printed part is conveniently corrected by a machining device, and the precision of the part is improved.
In a first aspect, the present invention provides a part printing method for printing a part having an arcuate profile. The part printing method comprises the following steps:
receiving modeling information of a part;
determining a laser scanning path according to the modeling information of the part;
and controlling the laser printing equipment according to the laser scanning path, and printing the arc-shaped outline of the part along the tangent line segment of the arc-shaped outline of the part, so that the arc-shaped outline of the part meets the requirement of machining allowance.
Compared with the prior art, in the part printing method provided by the invention, after the modeling information of the part is received, the corresponding laser scanning path when the part is printed is determined according to the modeling information of the part. And then controlling the laser printing device according to the determined laser scanning path to print the arc-shaped profile of the part along the tangent line segment of the arc-shaped profile of the part. Specifically, on the one hand, when the arc-shaped outline of the part is an outwardly-protruding arc-shaped outline or an inwardly-protruding arc-shaped inner outline, and the area where the arc-shaped outline of the part is located is printed along the tangent line segment of the arc-shaped outline of the part, the area between the arc-shaped outline and the tangent line segment is an extra area which is processed more, so that the processing allowance of the printed arc-shaped outline of the part is more than that of the rest area of the part, and the subsequent machining equipment is convenient to correct the printed arc-shaped outline of the part, and the precision of the part is improved. On the other hand, when the part is provided with the inward-protruding arc-shaped outer contour and/or the outward-protruding arc-shaped inner contour, and the machining allowance required to be reserved at the arc-shaped contour of the part is smaller than the machining allowance required to be reserved at the rest part, when the area where the arc-shaped contour of the part is located is printed along the tangent line segment of the arc-shaped contour of the part, the tangent line segment is located in the initial filling area, so that the area between the arc-shaped contour and the tangent line segment is an area which is machined less according to a preset scheme, waste of machining powder can be avoided, the arc-shaped contour of the part can be corrected through machining equipment after three-dimensional printing is finished, and the machining precision of the part is improved.
In a second aspect, the invention further provides a terminal device. The terminal device includes: a processor and a communication interface, the communication interface being coupled to the processor, the processor being configured to execute a computer program or instructions to implement the method of printing a part as described in the first aspect or any possible implementation form of the first aspect.
In a third aspect, the invention also provides a part printing system. The part printing system comprises the terminal device described in the first aspect or any possible implementation manner of the first aspect, and a laser printing device in communication connection with the terminal device.
In a fourth aspect, the present invention also provides a computer storage medium having instructions stored thereon, which when executed, cause a part printing method as described in the first aspect or any one of the possible implementations of the first aspect to be performed.
The advantageous effects of the second aspect to the fourth aspect and the various implementations thereof in the present invention can refer to the advantageous effects of the first aspect and the various implementations thereof, and are not described herein again.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic view of a laser scanning path of a part having an arcuate profile according to the prior art;
FIG. 2 is an enlarged view of a portion of the laser scanning path of FIG. 1;
FIG. 3 is a schematic view of another prior art component having an arcuate profile;
FIG. 4 is a schematic structural diagram of a parts printing system according to an embodiment of the present invention;
FIG. 5 is a flow chart of a part printing method according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a segment structure according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of another exemplary embodiment of a tangential line structure;
FIG. 8 is a schematic diagram of a partial structure of a laser scanning path according to an embodiment of the present invention;
FIG. 9 is a partial schematic view of another laser scanning path in accordance with an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a component printing apparatus according to an embodiment of the present invention;
fig. 11 is a schematic diagram of a hardware structure of a terminal device according to an embodiment of the present invention;
fig. 12 is a schematic structural diagram of a chip according to an embodiment of the present invention.
Detailed Description
In order to facilitate clear description of technical solutions of the embodiments of the present invention, in the embodiments of the present invention, terms such as "first" and "second" are used to distinguish the same items or similar items having substantially the same functions and actions. For example, the first threshold and the second threshold are only used for distinguishing different thresholds, and the sequence order of the thresholds is not limited. Those skilled in the art will appreciate that the terms "first," "second," and the like do not denote any order or importance, but rather the terms "first," "second," and the like do not denote any order or importance.
It is intended that the words "exemplary" or "such as" and "like" be used herein to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.
In the present invention, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a and b combination, a and c combination, b and c combination, or a, b and c combination, wherein a, b and c can be single or multiple.
Three-dimensional printing is a technique for constructing objects by layer-by-layer printing using a bondable material in powder form based on a digital model file. Specifically, three-dimensional printing is generally modeled by computer modeling software, then the built three-dimensional model is sliced and partitioned into sections layer by layer, and the three-dimensional printing equipment is guided to print layer by layer according to a laser scanning path, so that the object is rapidly molded.
In the three-dimensional printing process, the laser scanning path directly influences the organization structure of the processed part. Specifically, fig. 1 shows a schematic laser scanning path of a part having an arc-shaped profile in the prior art. Fig. 2 shows an enlarged view of a portion of the laser scanning path shown in fig. 1. As shown in fig. 1 and 2, when the part has an outwardly convex arcuate outer contour 101 and/or an inwardly convex arcuate inner contour 102, a laser scanning path (i.e., an initial filling path 105) is obtained using the existing filling path processing method, and a filling line at the arcuate contour coincides with the contour of the part. On the basis, the surface of the part manufactured by three-dimensional printing is rough, and machining operations such as grinding and the like need to be carried out on the printed part so that the fineness of the part meets the machining requirement. And the operation of polishing needs to consume part of the structure of the printed part, so that sufficient machining allowance needs to be reserved for the part during printing. When the filling line at the arc-shaped contour of the part is overlapped with the arc-shaped contour of the part, the part printed by adopting the laser scanning path has less machining allowance, which is not beneficial to correcting the arc-shaped contour of the part by machining equipment after the three-dimensional printing is finished, so that the precision of the part is poor.
Fig. 3 shows a schematic view of another prior art component having an arcuate profile. As shown in fig. 3, when the part has an inwardly protruding arc-shaped outer contour 103 and/or an outwardly protruding arc-shaped inner contour 104, and the machining allowance required to be reserved at the arc-shaped contour is smaller than the machining allowance required to be reserved at the remaining portion of the part, the part printed by using the laser scanning path has more machining allowances in the arc-shaped contour area, which is not beneficial to correcting the arc-shaped contour of the part by using a machining device after the three-dimensional printing is completed, while powder is wasted, so that the precision of the part is poor.
In order to solve the technical problem, embodiments of the present invention provide a method and a system for printing a part, a terminal device, and a computer storage medium. The part printing system provided by the embodiment of the invention can support three-dimensional printing technologies such as laser deposition and selective laser melting. Also, the part printing system may be applied to print parts having an arcuate profile. The arc-shaped profile may be a circular arc-shaped profile, an elliptical arc-shaped profile, or the like.
Fig. 4 is a schematic structural diagram of a part printing system according to an embodiment of the present invention. As shown in fig. 4, the parts printing system includes a terminal device 100, and a laser printing device 200 communicatively connected to the terminal device 100. The terminal device 100 may be a mobile phone, a computer, or other terminal device with a control function, so as to implement a printing strategy for a part with an arc-shaped contour.
As shown in fig. 4, the laser printing apparatus 200 may be a laser deposition manufacturing apparatus, a laser selective melting apparatus, or other three-dimensional printing apparatus. Specifically, the laser printing apparatus 200 includes a laser, a powder feeder, a molding chamber, and a laser head and moving assembly disposed within the molding chamber. The powder feeder is used for outputting powder according to a printing scheme. The laser head is arranged on the moving assembly, the moving assembly can align the laser head to the forming area according to the laser scanning path, and the laser head is used for sending the laser beam generated by the laser to the forming area.
As shown in fig. 4, the parts printing system may further include a scanner unit 300. The scanning unit 300 and the laser printing device 200 are both in communication connection with the terminal device 100, and data transmission is achieved. The communication method may be wireless communication or wired communication. The wireless communication can be based on networking technologies such as WiFi, ZigBee and the like. The wired communication may implement a communication connection based on a data line or a power line carrier. The communication interface may be a standard communication interface. The standard communication interface may be a serial interface or a parallel interface. For example: the terminal device 100 and the scanning unit 300 may communicate using an I2C (Inter-Integrated Circuit) bus. At this time, the scanning unit 300 may scan a part to be printed, generate modeling information of the part, and transmit the modeling information to the terminal device 100. Specifically, the scanning unit 300 may be any device capable of scanning a part and generating modeling information, such as a 3D scanner.
As shown in fig. 4, the parts printing system may further include an import unit 400 for reading the modeling information. The import unit 400 is communicatively connected to the terminal device 100. For the communication method between the import unit 400 and the terminal device 100, reference may be made to the foregoing description, and details are not described here. Specifically, the importing unit 400 may be any device capable of importing the modeling information generated by the artificial modeling into the terminal device 100. For example: the lead-in unit 400 may be a usb disk reading device.
Fig. 5 is a schematic flow chart illustrating a part printing method according to an embodiment of the present invention. The part printing method provided by the embodiment of the invention is applied to the part printing system shown in fig. 4. The parts printing system may be executed by a terminal device or a chip applied to the terminal device. As shown in fig. 5, a part printing method according to an embodiment of the present invention includes:
step 101: the scanning unit and/or the importing unit acquire modeling information of the part. The modeling information may include any information that can embody the particular structure of the part. For example: the modeling information may include a three-dimensional model corresponding to the part.
For example, a part having an arc-shaped profile may be scanned by a scanning unit such as a 3D scanner to identify a three-dimensional structure of the part. Modeling information for the part is then generated based on the three-dimensional structure of the part. Of course, the modeling information may also be obtained by an importing unit in an artificial modeling manner.
Step 102: the scanning unit and/or the importing unit sends the modeling information to the terminal equipment.
In an actual application process, both the scanning unit and the importing unit can communicate with the terminal device. When a part with an arc-shaped contour needs to be printed, the scanning unit and/or the importing unit can send the obtained modeling information to the terminal device so as to assist the terminal device in achieving a printing strategy for the part with the arc-shaped contour. Specifically, the communication mode between the scanning unit and the importing unit and the terminal device may refer to the foregoing, and details are not described herein.
Step 103: the terminal equipment receives modeling information of the part.
Step 104: and the terminal equipment determines the laser scanning path according to the modeling information of the part.
Specifically, the laser scanning path includes a tangent line segment of an arc-shaped contour of the part. The tangent line can be the tangent line of any point on the arc-shaped outline, and the processing allowance reserved at the arc-shaped outline of the printing part can meet the requirement as long as the processing allowance can be made to meet the requirement. For example: the tangent line is the tangent line of the midpoint of the arc-shaped contour. At this time, the tangent line segment has a starting point which is an intersection point of a tangent line to the midpoint of the corresponding arc-shaped profile and a filling line passing through the starting point of the corresponding arc-shaped profile. The end point of the tangent line segment is the intersection point of the tangent line of the midpoint of the corresponding arc-shaped contour and the filling line passing through the end point of the corresponding arc-shaped contour.
The determining the laser scanning path according to the modeling information of the part includes:
step 104.1: the terminal equipment determines an initial filling path according to the modeling information of the part.
In an actual application process, based on the received modeling information of the part, the terminal device may slice the three-dimensional model of the part included in the modeling information, and partition the three-dimensional model into cross sections layer by layer. And then identifying each layer of section, determining a profile file corresponding to each layer of section, partitioning and filling the profile file, and determining an initial filling path.
Specifically, as shown in FIG. 1, the initial fill path 105 includes a plurality of fill lines. The plurality of filling lines can be linear filling lines or arc filling lines. The linear filling line has two filling points, i.e., a start point and an end point of the linear filling line. Each arc-shaped filling line is superposed with the corresponding partial arc-shaped profile of the part. Also, as shown in fig. 2, the arc-shaped filling line (not shown) is composed of at least two straight-line-shaped filling segments, and thus, each arc-shaped filling line has at least three filling points. The line segment between two adjacent filling points is a linear filling segment forming an arc filling line.
In one example, after determining the initial filling path according to the modeling information of the part and before performing the subsequent operation, determining the laser scanning path according to the modeling information of the part further includes:
step 104.1-2: and under the conditions that the length of the filling line corresponding to the filling line is smaller than the preset length range and the number of the filling points of the filling line is larger than the preset number, the terminal equipment determines that the filling line is an arc-shaped filling line. Wherein, the number of the preset number is 2. Specifically, the preset number and the preset length range may be stored in a memory included in the terminal device in advance, or the preset number and the preset length range may be provided to the terminal device in a temporary loading manner.
In an actual application process, because the length of the filling line corresponding to the arc-shaped filling line is short, the arc-shaped filling line has at least three filling points, and the linear filling line has only two filling points, which filling lines are selected from the plurality of filling lines included in the initial filling path to be the arc-shaped filling lines according to the length of the filling line corresponding to each filling line and the number of the filling points of each filling line, so that the arc-shaped filling lines are processed in the subsequent process. The preset length range may be determined according to information such as the arc profile specification of the part and the distance between the filling lines, and is not specifically limited herein.
For example, a filling line with a length smaller than a preset length range may be first screened out from a plurality of filling lines included in the initial filling path. And traversing the filling lines with the length smaller than the preset length range, wherein if the number of the filling points corresponding to one filling line is larger than the preset number, the filling line is an arc-shaped filling line.
Step 104.2: and the terminal equipment processes the arc filling line in the initial filling path to obtain a tangent line segment of the midpoint of the arc filling line. The laser scanning path is an initial filling path after the arc filling line is corrected into the line cutting segment.
In the practical application process, the tangent line segment of the midpoint of the arc filling line can be determined based on the number of filling points of the arc filling line and the positions of the filling points. And then, inserting the data corresponding to the starting point and the ending point of the tangent line segment into the data corresponding to the corresponding arc filling line included in the initial filling path, deleting the data corresponding to the arc filling line, and realizing the correction of the arc filling line in the initial filling path so as to obtain the laser scanning path.
In one example, the processing the arc filling line in the initial filling path to obtain the tangent line segment of the midpoint of the arc filling line includes:
step 104.2.1: and the terminal equipment determines the tangent line of the midpoint of the arc filling line according to the number and the positions of the filling points of the arc filling line. Wherein, the slope that the tangent line of the mid-point of the above-mentioned arc fills the line has with the slope that the straight line passing starting point and end point has is equal.
In the practical application process, since the tangent line of the midpoint of the arc-shaped filling line is parallel to the straight line passing through the starting point and the ending point of the arc-shaped filling line, the tangent line of the midpoint of the arc-shaped filling line can be determined by using the position of the midpoint of the arc-shaped filling line and the slope of the straight line passing through the starting point and the ending point of the arc-shaped filling line. In this case, it is first necessary to determine which filling point is the middle point of the arc filling line, the start point of the arc filling line, and the end point of the arc filling line from among the plurality of filling points included in the arc filling line. Wherein, the middle point of the arc filling line is the middle point of the arc filling line in the broad sense. The midpoint is the most convex point on the arc-shaped filling line. Based on the method, at least two linear filling sections included by the arc filling line can be determined according to the positions and the number of the filling points of the arc filling line. And under the condition that the maximum included angle between two adjacent linear filling sections is determined, determining the intersection point of the two adjacent linear filling sections as the midpoint of the arc filling line. Then, according to the number of the filling points of the arc-shaped filling line, the starting point and the ending point can be screened out from the plurality of filling points included in the arc-shaped filling line.
Illustratively, when a certain arc-shaped filling line has 10 filling points (P respectively)1、P2、P3、P4、P5、P6、P7、P8、P9And P10) In this case, the arc-shaped filling line comprises 9 linear filling segments (P each)1P2、P2P3、P3P4、P4P5、P5P6、P6P7、P7P8、P8P9And P9P10). For the above 9And traversing the linear filling sections to determine the size of an included angle between two adjacent linear filling sections. If P4P5And P5P6The angle between the two adjacent linear filling segments is the largest, then P5The arc filling line has an arc filling line midpoint. Then, according to the number of the filling points, the first filling point P is determined from the 10 filling points1Is the starting point of the arc-shaped filling line, and determines a tenth filling point P from the 10 filling points10Is the termination point of the arcuate fill line. Then according to P1And P10Position determination pass P corresponding to two fill points1And P10Has a slope. Finally according to P5Location of fill point correspondence, and pass P1And P10Has a slope that determines a tangent to the midpoint of the arc-shaped fill line.
Step 104.2.2: the terminal equipment determines a linear filling line passing through the starting point and the ending point of the arc filling line according to the number and the positions of the filling points of the arc filling line.
In an actual application process, according to the positions of the starting point and the ending point of the arc-shaped filling line, a filling line passing through the starting point or the ending point from the plurality of filling lines included in the initial filling line can be screened. The selected filling lines may be straight filling lines passing through the starting point or the ending point, or may be arc filling lines passing through the starting point or the ending point, so that the straight filling lines passing through the starting point and the ending point of the arc filling lines need to be selected from the filling lines according to the number of the selected filling points of the selected filling lines. Specifically, how to judge whether the filling line is a linear filling line or an arc filling line according to the number of filling points of the filling line can refer to the foregoing, and details are not described here.
Step 104.2.3: and the terminal equipment determines the tangent line segment of the midpoint of the arc filling line according to the tangent line and the linear filling line.
In practical application, the straight-line-shaped filling line passing through the starting point and the ending point of the arc-shaped filling line in the initial filling path respectively defines the boundary of the starting end of the arc-shaped filling line and the boundary of the ending point of the arc-shaped filling line, so that the straight-line-shaped filling line passing through the starting point and the ending point of the arc-shaped filling line can be used as a dividing basis, and a tangent line segment of the midpoint of the arc-shaped filling line is determined from tangents of the midpoint of the arc-shaped filling line which extend to the two ends in a wireless manner. Under the condition, because of the coincidence of the arc filling line and the arc outline of the part, when the arc outline of the part is printed along the tangent line segment of the midpoint of the arc filling line, the area where the arc outline is located can be printed, and the printing of the rest areas of the part cannot be influenced, so that the printing precision of the part can be improved.
Fig. 6 is a schematic diagram illustrating a structure of a tangent line segment according to an embodiment of the present invention. As shown in fig. 6, in the case where the part has the arc-shaped contour 210 which is an outwardly convex arc-shaped outer contour and/or an inwardly convex arc-shaped inner contour, since the tangent line at the midpoint of the arc-shaped filling line 220 is located outside the initial filling region, after the straight filling line L1 passing through the starting point of the arc-shaped filling line 220 and the straight filling line L2 passing through the ending point of the arc-shaped filling line 220 are determined, it is necessary to appropriately extend the straight filling line L1 and the straight filling line L2 so that both have intersection points with the tangent line at the midpoint of the corresponding arc-shaped filling line 220, and the tangent line segment 230 at the midpoint of the arc-shaped filling line 220 is a portion where the tangent line is located between the two intersection points.
Fig. 7 is a schematic diagram illustrating another structure of a tangent line segment according to an embodiment of the present invention. In the case of a part having an inwardly and/or outwardly convex arcuate outer contour, as shown in fig. 7, a tangent to the midpoint of the arcuate fill line 220 is determined and intersects the straight fill line L1 passing through the start point of the arcuate fill line 220 and the straight fill line L2 passing through the end point of the arcuate fill line 220, respectively, since the tangent is located within the initial fill region. At this time, the portion of the tangent line between the two intersection points is a tangent line segment 230 at the midpoint of the arc filling line 220.
It should be noted that, if the laser scanning path is an initial filling path for correcting the arc filling line to be a tangent line segment of any point on the arc filling line except the midpoint, the tangent line segment passing through the tangent point can be determined according to the manner described above after the actually required tangent point position is obtained. And correcting the arc filling line information in the initial filling path according to the data of the tangent line segment.
Step 105: the terminal equipment controls the laser printing equipment according to the laser scanning path, and the arc-shaped outline of the part is printed along the tangent line segment of the arc-shaped outline of the part, so that the arc-shaped outline of the part meets the requirement of machining allowance.
In the practical application process, the terminal equipment can aim the laser head at the corresponding forming area by controlling the moving assembly included by the laser printing equipment according to the laser scanning path, so that the arc-shaped outline of the part is printed along the tangent line segment of the arc-shaped outline of the part, and finally the arc-shaped outline of the part meets the requirement of machining allowance.
Specifically, fig. 8 shows a schematic structural diagram of a laser scanning path portion provided by an embodiment of the present invention. As shown in fig. 8, when the arc-shaped contour 210 of the part is an outwardly convex arc-shaped outer contour or an inwardly convex arc-shaped inner contour, and the area where the arc-shaped contour 210 of the part is located is printed along the tangent line 230 of the arc-shaped contour 210 of the part, the area between the arc-shaped contour 210 and the tangent line 230 is an extra machined area, so that the machining allowance at the printed arc-shaped contour 210 of the part is larger than that at the remaining area of the part, which is convenient for a subsequent machining device to correct the arc-shaped contour 210 of the printed part, and improves the precision of the part.
Fig. 9 is a schematic diagram illustrating a partial structure of another laser scanning path provided by an embodiment of the present invention. As shown in fig. 9, according to actual processing requirements, when a part has an inwardly protruding arc-shaped outer contour and/or an outwardly protruding arc-shaped inner contour, and a processing margin required to be reserved at the arc-shaped contour 210 of the part is less than a processing margin required to be reserved at a remaining part, and an area where the arc-shaped contour 210 of the part is located is printed along a tangent line 230 of the arc-shaped contour 210 of the part, the area between the arc-shaped contour 210 and the tangent line 230 is an area which is processed less according to a preset scheme, so that processing powder waste can be avoided, and meanwhile, the arc-shaped contour 210 of the part can be corrected by machining equipment after three-dimensional printing is completed, and the processing precision of the part is improved.
In addition, because the distances between the midpoint of the arc filling line and the start point and the end point of the arc filling line are approximately equal, when the area where the arc contour of the part is printed along the tangent line segment of the midpoint of the arc filling line, the areas of the areas where more printing or less printing are performed on the two sides of the midpoint of the arc filling line are approximately equal, and the subsequent machining equipment can correct the arc contour of the part more conveniently.
From the above, it can be seen that, according to the actual part processing situation, the part printing method provided by the embodiment of the invention can be used for printing more or less areas where the arc-shaped outlines of the parts are located, so that the arc-shaped outlines of the parts meet the requirement of the processing allowance, the machining equipment can correct the outlines of the printed parts conveniently, and the precision of the parts is improved.
The above description mainly introduces the scheme provided by the embodiment of the present invention from the perspective of the terminal device. It is understood that the terminal device includes hardware structures and/or software modules for performing the respective functions in order to implement the functions. Those of skill in the art will readily appreciate that the present invention can be implemented in hardware or a combination of hardware and computer software, with the exemplary elements and algorithm steps described in connection with the embodiments disclosed herein. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiment of the present invention, the terminal device and the like may be divided into functional modules according to the above method examples, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. It should be noted that, the division of the modules in the embodiment of the present invention is schematic, and is only a logic function division, and there may be another division manner in actual implementation.
In the case of adopting the corresponding integrated unit, fig. 10 shows a schematic structural view of the parts printing apparatus 500 provided by the embodiment of the present invention. The component printing apparatus 500 may be a terminal device or a chip applied to a terminal device.
As shown in fig. 10, the parts printing apparatus 500 may further include: a processing unit 501 and a communication unit 502. Optionally, the parts printing apparatus 500 may further include a storage unit 503 for storing program codes and data of the parts printing apparatus 500.
In one example, as shown in fig. 10, the communication unit 502 is used to support the parts printing apparatus 500 to execute the steps 103 and 105 executed by the terminal device in the above embodiment.
As shown in fig. 10, the processing unit 501 is used to support the parts printing apparatus 500 to execute the step 104 executed by the terminal device in the above-described embodiment.
In one possible implementation, as shown in fig. 10, the processing unit 501 is configured to support the parts printing apparatus 500 to perform the steps 104.1, 104.1-2, and 104.2 performed by the terminal device in the foregoing embodiment.
In a possible implementation manner, as shown in fig. 10, the processing unit 501 is further configured to support the parts printing apparatus 500 to execute steps 104.2.1 to 104.2.3 executed by the terminal device in the foregoing embodiment.
As shown in fig. 10, the Processing Unit 501 may be a Processor or a controller, such as a Central Processing Unit (CPU), a general purpose Processor, a Digital Signal Processor (DSP), an Application-Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor described above may also be a combination of computing functions, e.g., comprising one or more microprocessors, DSPs and microprocessors, and the like. The communication unit 502 may be a transceiver, a transceiving circuit or a communication interface, etc. The storage unit 503 may be a memory.
As shown in fig. 10, when the processing unit 501 is a processor, the communication unit 502 is a transceiver, and the storage unit 503 is a memory, the parts printing apparatus 500 according to the embodiment of the present invention may be a hardware configuration diagram of the terminal device shown in fig. 11.
As shown in fig. 11, the terminal device 600 provided in the embodiment of the present invention includes a processor 610 and a communication interface 630. Communication interface 630 is coupled to processor 610.
As shown in fig. 11, the processor 610 may be a general processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more ics for controlling the execution of programs according to the present invention. The communication interface 630 may be one or more. Communication interface 630 may use any transceiver or the like for communicating with other devices or a communication network.
As shown in fig. 11, the terminal device 600 may further include a communication line 640. Communication link 640 may include a path that conveys information between the aforementioned components.
Optionally, as shown in fig. 11, the terminal device 600 may further include a memory 620. The memory 620 is used to store computer instructions that implement aspects of the present invention and is controlled for execution by the processor 610. The processor 610 is configured to execute the computer instructions stored in the memory 620, thereby implementing the part printing method provided by the embodiment of the present invention.
As shown in fig. 11, the memory 620 may be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a Random Access Memory (RAM) or other types of dynamic storage devices that can store information and instructions, an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to such. The memory 620 may be separate and coupled to the processor 610 via a communication line 640. The memory 620 may also be integrated with the processor 610.
Optionally, the computer instructions in the embodiment of the present invention may also be referred to as application program codes, which is not specifically limited in this embodiment of the present invention.
In particular implementations, as one embodiment, shown in FIG. 11, processor 610 may include one or more CPUs, such as CPU0 and CPU1 of FIG. 11.
In one implementation, as shown in fig. 11, the terminal device 600 may include a plurality of processors 610, such as the processor 610 and the processor 650 in fig. 11, for example. Each of these processors may be a single core processor or a multi-core processor.
Fig. 12 is a schematic structural diagram of a chip according to an embodiment of the present invention. As shown in fig. 12, the chip 700 includes one or more (including two) processors 710 and a communication interface 720.
Optionally, as shown in fig. 12, the chip 700 further includes a memory 730, and the memory 730 may include a read-only memory and a random access memory and provide operating instructions and data to the processor 710. The portion of memory may also include non-volatile random access memory (NVRAM).
In some embodiments, as shown in FIG. 12, memory 730 stores elements, execution modules or data structures, or a subset thereof, or an expanded set thereof.
In the embodiment of the present invention, as shown in fig. 12, the processor 710 performs the corresponding operation by calling the operation instruction stored in the memory (the operation instruction may be stored in the operating system).
As shown in fig. 12, the processor 710 controls processing operations of any one of the terminal devices, and the processor 710 may also be referred to as a Central Processing Unit (CPU).
As shown in fig. 12, memory 730 may include both read-only memory and random access memory, and provides instructions and data to processor 710. A portion of the memory 730 may also include NVRAM. For example, in applications where the memory, communication interface, and memory are coupled together by a bus system that may include a power bus, a control bus, a status signal bus, etc., in addition to a data bus. For clarity of illustration, however, the various buses are labeled as bus system 740 in fig. 12.
The method disclosed by the embodiment of the invention can be applied to a processor or realized by the processor. The processor may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in a processor or by instructions in the form of software. The processor may be a general purpose processor, a Digital Signal Processor (DSP), an ASIC, an FPGA (field-programmable gate array) or other programmable logic device, discrete gate or transistor logic device, or discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor.
The embodiment of the invention also provides a computer readable storage medium. The computer readable storage medium has stored therein instructions that, when executed, implement the functions performed by the terminal device in the above embodiments.
In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, it may be implemented in whole or in part in the form of a computer program product. The computer program product described above includes one or more computer programs or instructions. When the above-described computer program or instructions are loaded and executed on a computer, the procedures or functions described in the embodiments of the present invention are wholly or partially performed. The computer may be a general purpose computer, a special purpose computer, a computer network, a terminal, a user device, or other programmable apparatus. The computer program or instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer program or instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire or wirelessly. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, a data center, etc. that integrates one or more available media. The usable medium may be a magnetic medium, such as a floppy disk, a hard disk, a magnetic tape; or optical media such as Digital Video Disks (DVDs); it may also be a semiconductor medium, such as a Solid State Drive (SSD).
While the invention has been described in connection with various embodiments, other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed invention, from a review of the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the word "a" or "an" does not exclude a plurality. A single processor or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.
While the invention has been described in conjunction with specific features and embodiments thereof, it will be evident that various modifications and combinations can be made thereto without departing from the spirit and scope of the invention. Accordingly, the specification and figures are merely exemplary of the invention as defined in the appended claims and are intended to cover any and all modifications, variations, combinations, or equivalents within the scope of the invention. It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (7)
1. A part printing method is characterized by being applied to printing a part with an arc-shaped outline; the part printing method includes:
receiving modeling information of a part;
determining a laser scanning path according to the modeling information of the part;
controlling a laser printing device according to the laser scanning path, and printing the arc-shaped outline of the part along the tangent line segment of the arc-shaped outline of the part, so that the arc-shaped outline of the part meets the requirement of machining allowance;
the determining a laser scanning path according to the modeling information of the part comprises:
determining an initial filling path according to the modeling information of the part;
processing the arc filling line in the initial filling path to obtain a tangent line segment of the midpoint of the arc filling line; the laser scanning path is the initial filling path after the arc filling line is corrected into the tangent line segment;
the processing the arc filling line in the initial filling path to obtain the tangent line segment of the midpoint of the arc filling line includes:
determining a tangent line of a midpoint of the arc filling line according to the number and the positions of filling points of the arc filling line;
determining a linear filling line passing through the starting point and the ending point of the arc filling line according to the number and the positions of the filling points of the arc filling line;
determining a tangent line segment of the midpoint of the arc filling line according to the tangent line and the linear filling line;
before determining the tangent line of the midpoint of the arc filling line according to the number and the position of the filling points of the arc filling line, processing the arc filling line in the initial filling path to obtain the tangent line segment of the midpoint of the arc filling line further includes:
determining at least two linear filling sections included by the arc filling line according to the positions and the number of filling points of the arc filling line;
and under the condition that the included angle between two adjacent linear filling sections is determined to be the maximum, determining the intersection point of the two adjacent linear filling sections as the midpoint of the arc filling line.
2. The parts printing method according to claim 1, wherein the starting point of the tangent line segment is an intersection point of a tangent line to the midpoint of the corresponding arc-shaped contour and a filling line passing through the starting point of the corresponding arc-shaped contour, and the ending point of the tangent line segment is an intersection point of a tangent line to the midpoint of the corresponding arc-shaped contour and a filling line passing through the ending point of the corresponding arc-shaped contour.
3. The parts printing method as claimed in claim 1, wherein the initial filling path includes a plurality of filling lines;
after the initial filling path is determined according to the modeling information of the part, before the arc filling line in the initial filling path is processed to obtain a tangent line segment of a midpoint of the arc filling line, the determining the laser scanning path according to the modeling information of the part further includes:
determining the filling line as the arc-shaped filling line under the conditions that the length of the filling line corresponding to the filling line is smaller than a preset length range and the number of filling points of the filling line is larger than a preset number; wherein the preset number is 2.
4. The parts printing method according to claim 1, wherein a tangent line to a midpoint of the arc-shaped filling line has a slope equal to a slope of a straight line passing through the start point and the end point.
5. A terminal device, characterized in that the terminal device comprises: a processor and a communication interface, the communication interface being coupled to the processor, the processor being configured to run a computer program or instructions to implement a method of printing a part as claimed in any one of claims 1 to 4.
6. A parts printing system, comprising:
the terminal device of claim 5;
and the laser printing equipment is in communication connection with the terminal equipment.
7. A computer storage medium having stored therein instructions that, when executed, cause a method of printing parts as claimed in any one of claims 1 to 4 to be performed.
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Address after: Room 201, 2nd Floor, No. 5999 Wuxing Avenue, Zhili Town, Wuxing District, Huzhou City, Zhejiang Province, 313008 (self declared) Patentee after: Xinjinghe Laser Technology Co.,Ltd. Country or region after: China Address before: 102206 unit 1106 and 1107, unit 1, 11th floor, building 1, yard 1, Neng Dong Road, Shahe Town, Changping District, Beijing Patentee before: XINJINGHE LASER TECHNOLOGY DEVELOPMENT (BEIJING) Co.,Ltd. Country or region before: China |