CN111203609B - Bimetal electric arc additive manufacturing method - Google Patents
Bimetal electric arc additive manufacturing method Download PDFInfo
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- CN111203609B CN111203609B CN201911424547.3A CN201911424547A CN111203609B CN 111203609 B CN111203609 B CN 111203609B CN 201911424547 A CN201911424547 A CN 201911424547A CN 111203609 B CN111203609 B CN 111203609B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/04—Welding for other purposes than joining, e.g. built-up welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/12—Automatic feeding or moving of electrodes or work for spot or seam welding or cutting
- B23K9/133—Means for feeding electrodes, e.g. drums, rolls, motors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/32—Accessories
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- Arc Welding In General (AREA)
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Abstract
The invention discloses a bimetal arc additive manufacturing method, which comprises the steps of inputting a workpiece digital-analog to be printed into a computer, and inputting the designed template structure data of each layer of slices into the computer; slicing the workpiece digital analogy in a layering mode according to the Z direction to obtain the cross section of each layer of slices, wherein the number of the slices is M; calculating and generating a linear filling path of each layer of slices of the workpiece according to the cross section of each layer of slices of the workpiece; comparing the template structure corresponding to each layer of the slices with the range of the layer of the slices, and performing the next step if the template structure completely covers the cross section of the layer of the slices; and calculating intersection points of all linear filling paths generated by the nth layer of slices and each edge of the polygon of the nth layer of template structure corresponding to the nth layer of slices, wherein the intersection points are switching points of the metal welding wires A and the metal welding wires B on the linear filling paths. The method can realize regular or irregular alternate filling cladding by adopting two different metal welding wires.
Description
Technical Field
The invention relates to a bimetal electric arc additive manufacturing method, and belongs to the technical field of metal welding processing. .
Background
The electric arc additive manufacturing is a manufacturing method for realizing workpiece forming by welding, melting and stacking metal layer by layer. In the traditional arc additive manufacturing step, slicing software is used for conducting layered slicing and path planning on a digital model of a part according to the Z direction, and a program is output to a welding robot to conduct additive manufacturing operation. At present, the bimetal arc additive manufacturing only changes the filling direction of an interlayer filling line and fills two different metals according to the fixed proportion of the filling line through software. When two metals in a workpiece need regular or irregular alternate filling, only changing the filling direction of the filling line between layers and the filling ratio of the two metals in the filling line cannot meet the requirement that the workpiece needs irregular alternate filling to perform material increase operation.
Disclosure of Invention
The invention aims to solve the technical problem of providing a bimetal electric arc additive manufacturing method which can realize regular or irregular alternate filling cladding by adopting two different metal welding wires.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a bimetal arc additive manufacturing method adopts a bimetal welding wire as a deposited filling material, wherein the bimetal welding wire comprises an A metal welding wire and a B metal welding wire; the method specifically comprises the following steps:
(1) inputting a workpiece digital model to be printed into a computer, and inputting the designed template structure data of each layer of slices into the computer; the template structure of each layer of slices is a plane polygon; meanwhile, a hollow area of the template structure is limited to be filled with metal welding wires A, and a solid part is filled with metal welding wires B; simultaneously limiting the template structure used by each layer of slices;
(2) slicing the workpiece digital analogy in a layering mode according to the Z direction to obtain the cross section of each layer of slices, wherein the number of the slices is M;
(3) calculating and generating a linear filling path of each layer of slices of the workpiece according to the cross section of each layer of slices of the workpiece;
(4) comparing the template structure corresponding to each layer of slices with the range (size) of the slices of the layer, if the template structure completely covers the cross section of the slices of the layer, carrying out the next step, otherwise, continuing splicing the template structure until the spliced template structure completely covers the cross section of the slices of the layer;
(5) calculating intersection points of all linear filling paths generated by the nth layer of slices and each side of a polygon of the nth layer of template structure corresponding to the nth layer of slices, wherein the intersection points are switching points of the metal welding wires A and the metal welding wires B on the linear filling paths; wherein N starts from layer 1 to layer M ends;
(6) when the number of switching points on one linear filling path is i, the linear filling path is divided into i +1 line segments, the midpoint of each line segment is taken, and whether the midpoint of each line segment is in the solid part or the hollow area of the polygon of the Nth-layer template structure is calculated to determine whether each line segment is filled with the A metal welding wire or the B metal welding wire;
(7) processing each linear filling path generated by the nth layer of slices according to the step (6) to obtain filling areas of the metal welding wires A and the metal welding wires B on each linear filling path on the layer of slices, and obtaining the filling paths of the metal welding wires A and the metal welding wires B on the layer of slices;
(8) repeating the steps (5) to (7) to obtain a filling path of the metal welding wire A and the metal welding wire B on each layer of the slices;
(9) and converting the generated filling path into a code of a welding robot, and performing dual-wire additive manufacturing by the robot according to the code converted by the filling path.
The bimetal welding wire adopts a MIG/MAG welding machine as a heat source or adopts a plasma welding machine as a heat source.
The template structure is composed of a polygon or formed by splicing a plurality of repeated polygon units.
Wherein, the polygon unit is a rhombus, a square or a triangle.
Wherein, one layer of slices corresponds to one layer of template structure, and the template combinations of the slices of the adjacent layers are the same or different.
Wherein, welding wire A and welding wire B are regularly or irregularly alternately filled in each section of additive welding bead, the unit length of each section of additive welding bead is L, and L is X% welding wire A + (1-X)% welding wire B.
Has the advantages that: the method can realize regular or irregular alternate filling cladding by adopting two different metal welding wires.
Drawings
FIG. 1 is a flow chart of the method of the present invention;
FIG. 2 is a schematic diagram of a bi-metal workpiece to be printed;
FIG. 3 is a schematic structural view of a slice of a bimetallic workpiece made of two metals, each layer of the workpiece having a standard honeycomb bionic structure, according to example 1;
FIG. 4 is a schematic view of a template structure corresponding to the twin wire metal workpiece of example 1;
fig. 5 is a schematic illustration of a layer slice fill path for producing a resulting bi-metallic workpiece.
Detailed Description
The invention will be better understood from the following examples. However, those skilled in the art will readily appreciate that the description of the embodiments is only for illustrating the present invention and should not be taken as limiting the invention as detailed in the claims.
As shown in fig. 1, the method for manufacturing a bimetal arc additive comprises the following steps:
step 1, importing a workpiece (figure 2) digital-to-analog file (stl three-D file), namely a square;
step 2, importing a designed template structure, namely honeycomb template (figure 4) data (point cloud file), wherein each layer of slices uses the template structure in the embodiment;
step 3, carrying out layered slicing on the workpiece digital model to be printed according to the Z direction (the height h of each layer of slices is determined), and obtaining the cross section of each layer of slices, wherein the number of layers is M;
step 4, configuring a template used by each layer of the M layers of slices, wherein in the embodiment, a honeycomb template is used by each layer of the M layers of slices (fig. 4);
step 5, calculating the cross section of the Nth (from 1 to M) layer slice of the workpiece to generate a straight filling path of the layer slice;
step 6, comparing the template structure (figure 4) configured on the Nth layer with the range of the Nth layer of slices of the workpiece, directly performing the next step if the template structure can completely cover the cross section of the Nth layer of slices of the workpiece, and otherwise, continuously splicing the template structures on the Nth layer until the spliced template structure can completely cover the cross section of the Nth layer of slices of the workpiece;
step 7, calculating intersection points of all linear filling paths generated by the nth layer of slices and each edge of a polygon of the nth layer of template structure, wherein the intersection points are switching points of the metal welding wires A and the metal welding wires B on the linear filling paths;
step 8, setting the number of switching points of a linear filling path as i (the number of the switching points is the number of the points where the linear filling path intersects with the side lines of the template structure polygon), dividing the linear filling path into i +1 line segments, and taking the middle point of each line segment to calculate whether the middle point is in the solid part or the hollow part of the N layers of template structure polygons so as to determine whether each line segment is filled with an A metal welding wire or a B metal welding wire (the solid part is filled with a B metal welding wire, and the hollow part is filled with an A metal welding wire);
step 9, processing each linear filling path generated by the N layers of slices according to the step 8 in sequence to obtain filling areas of the metal welding wires A and the metal welding wires B on each linear filling path of the layers of slices;
and 10, generating codes of the welding robots by all the linear filling paths, and sending the codes to the welding robots to perform the dual-wire additive manufacturing.
Claims (6)
1. A bimetal arc additive manufacturing method is characterized in that: the method adopts a bimetal welding wire as a deposited filling material, wherein the bimetal welding wire comprises an A metal welding wire and a B metal welding wire; the method specifically comprises the following steps:
step 1, importing a workpiece digital-to-analog file, namely a square;
step 2, importing designed template structure-honeycomb template data, wherein each layer of slices use the template structure;
step 3, slicing the workpiece digital analogy to be printed in a layering mode according to the Z direction to obtain the cross section of each layer of slices, wherein the number of the slices is M;
step 4, configuring a template used by each layer of slices of the M layers of slices, wherein each layer of slices of the M layers of slices uses a honeycomb template;
step 5, calculating the cross section of the Nth layer of slices of the workpiece to generate a linear filling path of the layer of slices; n starts from 1 to M ends;
step 6, comparing the template structure configured on the Nth layer with the range of the Nth layer of slices of the workpiece, directly performing the next step if the template structure can completely cover the cross section of the Nth layer of slices of the workpiece, or continuing splicing the template structures on the Nth layer until the spliced template structure can completely cover the cross section of the Nth layer of slices of the workpiece;
step 7, calculating intersection points of all linear filling paths generated by the nth layer of slices and each edge of a polygon of the nth layer of template structure, wherein the intersection points are switching points of the metal welding wires A and the metal welding wires B on the linear filling paths;
step 8, setting the number of switching points of a linear filling path as i, wherein the number of the switching points is the number of points where the linear filling path intersects with the side line of the template structure polygon, the linear filling path is divided into i +1 line segments, and the midpoint of each line segment is taken to calculate whether the midpoint is in the solid part or the hollow part of the template structure polygon of N layers for determining whether each line segment is filled with the metal welding wire A or the metal welding wire B, the solid part is filled with the metal welding wire B, and the hollow part is filled with the metal welding wire A;
step 9, processing each linear filling path generated by the N layers of slices according to the step 8 in sequence to obtain filling areas of the metal welding wires A and the metal welding wires B on each linear filling path of the layers of slices;
and 10, generating codes of the welding robots by all the linear filling paths, and sending the codes to the welding robots to perform the dual-wire additive manufacturing.
2. The bi-metallic arc additive manufacturing method of claim 1, wherein: the bimetallic wire adopts a MIG/MAG welding machine as a heat source or a plasma welding machine as a heat source.
3. The bi-metallic arc additive manufacturing method of claim 1, wherein: the template structure is composed of a polygon or formed by splicing a plurality of repeated polygon units.
4. The bi-metallic arc additive manufacturing method of claim 3, wherein: the polygonal units are rhombus, square or triangle.
5. The bi-metallic arc additive manufacturing method of claim 1, wherein: the slices of one layer correspond to the template structures of one layer, and the template combinations of the slices of the adjacent layer are the same or different.
6. The bi-metallic arc additive manufacturing method of claim 1, wherein: the unit length of each additive welding pass is L, and L = X% welding wire A + (1-X)% welding wire B.
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Citations (5)
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| US4521664A (en) * | 1982-10-26 | 1985-06-04 | Teledyne, Inc. | Process and apparatus for surfacing with high deposition and low dilution |
| CN107838532A (en) * | 2017-10-25 | 2018-03-27 | 扬州大学 | A kind of bimetallic cladding increasing material manufacturing method |
| CN107931781A (en) * | 2017-12-20 | 2018-04-20 | 西安航空学院 | Double metallic composite material electric arc increasing material manufacturing device and its manufacture method |
| CN109986169A (en) * | 2019-04-24 | 2019-07-09 | 南京英尼格玛工业自动化技术有限公司 | A kind of bimetallic electric arc increasing material manufacturing method based on MIG/MAG heat source |
| CN110039155A (en) * | 2019-04-24 | 2019-07-23 | 南京英尼格玛工业自动化技术有限公司 | A kind of bimetallic electric arc increasing material manufacturing method using MIG/MAG as heat source |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4521664A (en) * | 1982-10-26 | 1985-06-04 | Teledyne, Inc. | Process and apparatus for surfacing with high deposition and low dilution |
| CN107838532A (en) * | 2017-10-25 | 2018-03-27 | 扬州大学 | A kind of bimetallic cladding increasing material manufacturing method |
| CN107931781A (en) * | 2017-12-20 | 2018-04-20 | 西安航空学院 | Double metallic composite material electric arc increasing material manufacturing device and its manufacture method |
| CN109986169A (en) * | 2019-04-24 | 2019-07-09 | 南京英尼格玛工业自动化技术有限公司 | A kind of bimetallic electric arc increasing material manufacturing method based on MIG/MAG heat source |
| CN110039155A (en) * | 2019-04-24 | 2019-07-23 | 南京英尼格玛工业自动化技术有限公司 | A kind of bimetallic electric arc increasing material manufacturing method using MIG/MAG as heat source |
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