CN112464405A - Weld joint expression method based on three-dimensional model - Google Patents
Weld joint expression method based on three-dimensional model Download PDFInfo
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- CN112464405A CN112464405A CN202011349312.5A CN202011349312A CN112464405A CN 112464405 A CN112464405 A CN 112464405A CN 202011349312 A CN202011349312 A CN 202011349312A CN 112464405 A CN112464405 A CN 112464405A
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- G06—COMPUTING; CALCULATING OR COUNTING
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- G06F30/10—Geometric CAD
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Abstract
The invention relates to a three-dimensional model-based weld joint expression method, which is used for information expression of weld joints among parts in a workpiece and comprises the following steps: s1, establishing a three-dimensional model of the workpiece in three-dimensional design software, and performing collision inspection on a part model in the three-dimensional model to obtain a closed geometric wire frame; setting a screening condition, and screening out a geometric wire frame needing to be calculated; formulating a weld joint model generation rule, and obtaining a weld joint model on a geometric wire frame needing to be calculated; s2, generating a welding seam node on each welding seam model, wherein a welding information table is stored in each welding seam node, and the welding information table at least comprises parameter items such as welding seam types, welding seam stages, welding seam lengths and the like; s3, editing the welding information tables of all the welding seam models, and determining the numerical values or information of parameter items in the welding information tables; and S4, formulating a welding line color display rule, classifying the welding line model according to the height of a welding leg of the welding line model, and displaying the welding line model by adopting different colors for different classifications.
Description
Technical Field
The invention relates to the field of mechanical welding, in particular to a weld joint expression method based on a three-dimensional model.
Background
In the production and construction process of ships, welding operation occupies an extremely important position, and the construction quality of the ships is directly influenced. At present, in the ship industry, the amount of welding seams is counted in a tabular form, and field construction personnel mainly carry out welding seam construction on the basis of welding seam information on a two-dimensional drawing. The weld information under the expression mode is complex, needs to contain a plurality of different weld information such as weld leg height, welding mode, welding attitude, current and voltage, and is not clear and intuitive. In addition, the weld view chart can express a local area, and the overall view angle is lacked, so that human errors are easy to generate. Finally, this expression requires a large number of map printing jobs, creating a significant waste of resources on paper and manpower.
Disclosure of Invention
In view of the above drawbacks of the prior art, the technical problem to be solved by the present invention is to provide a weld joint expression method based on a three-dimensional model, which can clearly express weld joint information visually, facilitate search and statistics, and save resources.
In order to achieve the above object, the present invention provides a weld joint expression method based on a three-dimensional model, which is used for information expression of weld joints between parts in a workpiece, and comprises the following steps:
s1, establishing a three-dimensional model of the workpiece in three-dimensional design software, performing collision inspection on part models in the three-dimensional model, and intersecting collided parts to obtain a closed geometric wire frame; setting a screening condition, and screening out a geometric wire frame needing to be calculated; formulating a weld joint model generation rule, and obtaining a weld joint model on a geometric wire frame needing to be calculated, wherein the weld joint model is represented by all or part of lines in the geometric wire frame;
s2, generating a welding seam node on each welding seam model, wherein a welding information table is stored in each welding seam node, and the welding information table at least comprises three parameter items of a welding seam type, a welding seam stage and a welding seam length;
s3, editing the welding information tables of all the welding seam models, and determining the numerical values or information of parameter items in the welding information tables;
s4, making a welding line color display rule, classifying the welding line model according to the numerical value or information of the parameter item in the welding information table of the welding line model, and displaying the welding line model by adopting different colors for different classifications.
Further, in step S2, the parameter items in the welding information table further include fillet height, welding mode, welding posture, welding current, welding voltage, part to which the weld belongs, and thickness and material of the part to which the weld belongs.
Further, in step S3, the length of the weld is automatically calculated according to the length of the geometric wire frame.
Further, in step S3, a fillet calculation rule is preset, the fillet height is automatically calculated according to the thickness and material of the part to which the weld belongs and the fillet calculation rule, and the calculated fillet height is checked and corrected.
Further, the weld seam models include a fillet weld type and a butt weld type, and in step S3, for all the butt weld types of the weld seam models, a fillet height is given to a specific fillet height X, which is different from the fillet height of any other weld seam model; in the step S4, all the butt-welding-type seam models are classified into one type according to the fillet height X, and a color is given to the butt-welding-type seam models.
Further, in the step S4, setting a parameter Y, and classifying fillet welding type weld models with leg heights smaller than Y into one type and uniform color as non-key parts of interest; and taking the fillet welding type welding seam model with the fillet welding height more than or equal to Y as a key attention part, carrying out different classification according to the fillet welding height, giving different colors according to the different classification, and enabling the colors to be different from the colors of the non-key attention part.
Further, in step S4, for the fillet weld type weld model, the line width of the weld model of the important part is greater than the line width of the weld model of the non-important part.
As described above, the weld seam expression method according to the present invention has the following advantageous effects:
different welding seams in the workpiece are expressed by adopting the welding seam models with different colors in the three-dimensional model of the workpiece, and each item of information of the welding seam models is expressed by welding information, the welding seam condition can be comprehensively and visually and clearly displayed, operators can conveniently and visually find corresponding welding seams quickly, and relevant information of the welding seams is stored through welding seam nodes, the operators can conveniently look up the welding seam condition, the operators can compare the welding seams with a complex data table one by one, more clear construction guidance is provided for field construction personnel, and the reading understanding deviation is greatly reduced compared with a drawing. The three-dimensional nodes are used as carriers, all welding information is stored, the welding information is automatically managed, the quantity of the welding seam can be conveniently and quickly counted, a single model information source is fundamentally realized, and the phenomena that the information source is not uniform and the information is excessively complicated are avoided; the method can also be applied to automatic identification of welding paths of welding robots, and can meet the requirements of machine welding for single-side/double-side welding seam line models with higher accuracy. In addition, a large amount of printing and labor cost can be saved, paperless design and construction are realized, the ship construction period is further shortened, and the construction quality is improved.
Drawings
FIG. 1 is a schematic view of the main flow of the weld seam expression method of the present invention.
FIG. 2 is a schematic diagram of a weld model in the present invention using a half-edge representation and a full representation.
FIG. 3 is a schematic diagram of a weld model in the present invention using a half-edge representation and a full representation.
Description of the element reference numerals
1 geometric wire frame
2 weld joint model
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
It should be understood that the structures, proportions, and dimensions shown in the drawings and described herein are for illustrative purposes only and are not intended to limit the scope of the present invention, which is defined by the claims, but rather by the claims. In addition, the terms such as "upper", "lower", "left", "right" and "middle" used in the present specification are for convenience of description only, and are not intended to limit the scope of the present invention, and changes or modifications of the relative relationship thereof may be regarded as the scope of the present invention without substantial changes in the technical contents.
Referring to fig. 1 to 3, the present invention provides a weld seam expression method based on a three-dimensional model, which is used for information expression of weld seams between parts in a workpiece, and particularly, can be used for expression of weld seams between parts in a ship structure, and comprises the following steps:
s1, establishing a three-dimensional model of the workpiece in three-dimensional design software, performing collision inspection on part models in the three-dimensional model, and intersecting collided parts to obtain a closed geometric wire frame; formulating a weld joint model generation rule, and screening out a geometric wire frame needing to be calculated; and formulating a weld joint model generation rule, obtaining a weld joint model on a geometric wire frame needing to be calculated, wherein the weld joint model is represented by all or part of lines in the geometric wire frame, and the lines are preferably displayed in a thickening mode by adopting a certain line width, namely the weld joint model is a line model.
Specifically, when the workpiece is of a ship structure, all part models are obtained from a three-dimensional model of the ship structure, collision check is carried out on all the part models to obtain all part pairs which are likely to collide, geometric intersection is carried out on each pair of part pairs, if the intersection result is a point, the intersection weld seam which needs to be calculated is not considered to exist, and if the intersection result is a closed geometric wire frame, the intersection weld seam which needs to be calculated is considered to exist. Then, setting screening conditions, wherein the screening conditions can be determined according to specific production needs, and can include attributes and information such as part types, part numbers, spatial relative positions and the like, and the screening conditions can be preset in a software system for automatic screening. And screening out a geometric wire frame of the welding line needing to be calculated in the workpiece by artificially setting screening conditions. In this embodiment, when the workpiece is of a ship structure, the screened geometric wire frame to be calculated is mainly a long and narrow closed geometric wire frame obtained by intersecting plates, and the closed geometric wire frame has a plurality of different shapes according to different parts, and may be a planar wire frame (i.e., the wire frame is on one plane) or a three-dimensional wire frame (i.e., the wire frame is on different planes).
Then, according to a weld joint model generation rule formulated in advance, a weld joint model is obtained on a geometric wire frame needing to be calculated, in the embodiment, referring to fig. 2 and fig. 3, in the geometric wire frame, a line formed by intersecting plate surfaces of plates can be called a long-side line, the geometric wire frame comprises two long-side lines, the two long sides are connected through a short-side line, and the short-side line is also formed by intersecting side surfaces of the plates. The weld joint model generation rule mainly comprises double-side representation and single-side representation, wherein the double-side representation means that the weld joint model is represented by two long-side lines in a geometric wire frame and is generally used for double-side welding; the single-side representation means that the weld joint model is displayed by one of the long-side lines (generally, the outer long-side line) of the geometric wire frame, and is generally used for single-side welding, specifically, see fig. 2 and 3, where fig. 2 and 3 are schematic diagrams of obtaining the weld joint model 2 on the geometric wire frames 1 of two different shapes, where fig. 2(a) and 3(a) are the geometric wire frames 1, fig. 2(B) and 3(B) are the weld joint model 2 represented by a single side, and fig. 2(C) and 3(C) are the weld joint model 2 represented by a double side. Specifically, the single-side representation or the double-side representation is adopted, and the selection can be carried out according to actual needs.
And S2, generating a welding seam node on the welding seam model, wherein a welding information table is stored in the welding seam node, and the welding information table at least comprises three parameter items of a welding seam type, a welding seam stage and a welding seam length.
In this embodiment, the welding information table further includes parameter items such as leg height, welding mode, welding posture, welding current, welding voltage, parts to which the weld joint belongs, and thickness and material of the parts to which the weld joint belongs, and other information can be added as needed.
And S3, editing the welding information table of all the welding seam models, and determining the numerical values or information of the parameter items in the welding information table. The values or information of the parameter items can be obtained by software through automatic calculation or can be manually input after external calculation.
Since the welding line is mainly classified into a fillet welding line and a butt welding line according to the welding type, the fillet welding line mainly needs to express the leg height, and the butt welding line mainly needs to express the welding manner without the leg height. In this embodiment, the butt weld adopts a uniform expression form and is distinguished from the fillet weld, specifically, the weld model includes a fillet weld type weld model and a butt weld type weld model, for all butt weld type weld models, since it is not necessary to express fillet height information, the fillet height in the weld information table thereof can be given to a specific value X, the specific value X is different from the value of the fillet height of any other weld model, X can be specifically set to a negative value, and the fillet height of the fillet weld type weld model is a positive value, so that separation can be conveniently and clearly achieved, and subsequent weld models can be directly classified according to the fillet height.
In this embodiment, the weld length of the fillet weld type weld model is automatically calculated according to the length of the geometric wire frame, and for the weld model expressed bilaterally, the weld length is the sum of the lengths of the two long sides, and in some cases, the length of the geometric wire frame can be approximately taken. The fillet height of the fillet welding type welding seam model can be calculated by presetting a fillet calculation rule, the fillet calculation rule can be set according to the welding condition of an actual workpiece and is particularly related to factors such as the plate thickness, the material and the design area of a part to which a welding seam belongs, the fillet coefficient is determined through the factors, the fillet calculation rule can be set in a software system, then the fillet height is automatically calculated according to the thickness and the material of the part to which the welding seam belongs in a welding information table, then the calculated fillet height is checked and corrected, and the final welding height value is determined according to the specification requirement, for example, for an irregular value, upward rounding processing is carried out in a 0.5 carry mode. For a ship structure workpiece, a fillet weld type weld model belonging to a toggle plate or patch plate part can uniformly set the leg height to a constant value regardless of the part properties, without performing calculation by plate thickness and material quality.
The values or information of other parameter items in the welding information table are determined according to respective definition rules, which may be different depending on the specific situation, for example, in the ship structure, the welding attitude is determined in combination with the assembly stage information formed by the assembly module system, the welding mode, the welding current, and the welding voltage are determined according to the plate thickness, material, and construction process of the part, and the plate thickness and material of the part to which the weld belongs, and the part to which the weld belongs are determined in the model construction in step S1. The definition rule is not important in this application, and therefore, a person skilled in the art may obtain the values or information of the parameter items according to the specific situation without detailed description.
S4, making a welding line color display rule, classifying the welding line model according to the numerical value or information of the parameter item in the welding information table of the welding line model, displaying the welding line model by adopting different colors for different classifications, wherein the same color is used for the same classification. The classification mode may be various, and may be determined specifically as required, for example, the butt-welding type weld joint models may be classified into one type, the fillet-welding type weld joint models may be classified into one type, and then the classification may be further performed according to the information of the welding type in the welding information table. The classification according to the height of the weld leg of the weld model can be performed in a numerical range mode, can also be performed in a numerical point mode, and can also be performed in a combination of the two modes.
In this embodiment, for the seam models of the butt welding types, because the welding heights of the seam models are uniformly assigned as X in the previous step S3 for convenience of classification according to the heights of the fillets, in this step, the seam models of all the butt welding types can be classified into one type according to the height of the fillet, the seam models of the butt welding types are given a specific color for convenience of distinguishing from the seam models of the fillet welding types, and since the seam models of the butt welding types pay attention to the welding mode rather than the height of the fillet, the worker is reminded of the specific color, so that the worker can find the seam models conveniently.
For the fillet welding type welding seam model, the fillet welding type welding seam model is divided into a plurality of classes according to the difference of the height of the fillet welding seam, each class is endowed with different colors for display, the same classification color is the same, and the classification colors are the same, so that the working personnel can visually judge the height of the fillet welding type welding seam model according to different colors, and the fillet welding seam model is convenient and clear. Further, in the ship structure, a parameter Y may be set, for example, Y is 4.5mm, fillet weld type weld models having a leg height smaller than Y are classified as a non-important part, displayed in one color and displayed with a smaller line width; and the fillet welding type welding line model with the fillet height more than or equal to Y is taken as a key focus part, then different classifications are carried out according to the fillet height, then different colors are given according to the different classifications, the colors are different from the colors of the non-key focus part, and larger line width display is adopted, namely, the line width of the fillet welding line model with the part needing attention is larger than the line width of the fillet welding line model without the part needing attention, and the colors are also obviously different, so that the attention of workers is further reminded. When the staff need know the concrete specific attribute of a certain welding model, only need the main points hit and produce the welding seam node on the welding seam model, look up the welding information table can, simple and convenient.
The weld joint expression method of the invention is carried out by adopting corresponding three-dimensional design software, and the used three-dimensional design software can be the existing three-dimensional design software and can also be realized by additionally arranging corresponding plug-in modules on the basis of the existing three-dimensional design software, so that the three-dimensional design software has corresponding functional modules, such as a weld joint model generation module, a weld joint attribute adding module, a weld leg height analysis module and a weld joint color updating module. And the welding seam model generation module is used for analyzing the workpiece model and performing collision inspection on the workpiece model to enable collision parts to be intersected to finally obtain the welding seam model. The weld attribute adding module is used for automatically or manually endowing numerical values or information of various parameter items in the welding information table, such as numerical values or information of parameter items such as the height of a welding leg, the length of a weld joint, the welding mode, a part to which the weld joint belongs and the flow direction of the part, and the like, and providing an interface for a user to freely edit and add the numerical values or information of the parameter items such as the welding posture, the welding current, the welding point pressure and the like. The weld leg height analysis module is used for analyzing and correcting the weld leg height value and automatically setting the weld leg height in the welding information table of the welding node, and the weld color updating module is used for giving batch colors and updating views to the weld model according to the weld color display rule.
It should be noted that these functional modules are expressed and implemented by the expression method of the present invention in a software program manner, that is, the functional modules in the three-dimensional design software are obtained based on the welding expression method of the present invention, rather than the functional modules in the three-dimensional design software being used to obtain the weld expression method of the present invention in advance.
According to the welding seam expression method, the welding seam is expressed through the three-dimensional model, different welding seams are expressed through different colors, the welding seam condition can be comprehensively and visually and clearly displayed, an operator can conveniently and visually and quickly find the corresponding welding seam, relevant information of the welding seam is stored through the welding seam node, the operator can conveniently look up the welding seam, resources are saved, and working efficiency is improved. Especially when the method is applied to complex workpieces such as ship structures and the like, the welding line condition in the ship building process can be comprehensively displayed in the production process, the comparison between the welding line and a complex data table by constructors one by one is omitted, clearer construction guidance is provided for field constructors, and the reading and understanding deviation is greatly reduced compared with a drawing. In addition, the three-dimensional nodes are used as carriers, all welding information is stored, the welding information is automatically managed, the quantity of the welding seam can be conveniently and quickly counted, a single model information source is fundamentally realized, and the phenomena that the information source is not uniform and the information is excessively complicated are avoided. The method can also be applied to automatic identification of welding paths of welding robots, and can meet the requirements of machine welding for single-side/double-side welding seam line models with higher accuracy. In addition, a large amount of printing and labor cost can be saved, paperless design and construction are realized, the ship construction period is further shortened, and the construction quality is improved.
In conclusion, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (7)
1. A weld joint expression method based on a three-dimensional model is used for information expression of weld joints between parts in a workpiece and is characterized in that: the method comprises the following steps:
s1, establishing a three-dimensional model of the workpiece in three-dimensional design software, performing collision inspection on part models in the three-dimensional model, and intersecting collided parts to obtain a closed geometric wire frame; setting a screening condition, and screening out a geometric wire frame needing to be calculated; formulating a weld joint model generation rule, and obtaining a weld joint model on a geometric wire frame needing to be calculated, wherein the weld joint model is represented by all or part of lines in the geometric wire frame;
s2, generating a welding seam node on each welding seam model, wherein a welding information table is stored in each welding seam node, and the welding information table at least comprises three parameter items of a welding seam type, a welding seam stage and a welding seam length;
s3, editing the welding information tables of all the welding seam models, and determining the numerical values or information of parameter items in the welding information tables;
s4, making a welding line color display rule, classifying the welding line model according to the numerical value or information of the parameter item in the welding information table of the welding line model, and displaying the welding line model by adopting different colors for different classifications.
2. The weld expression method of claim 1, wherein: in step S2, the parameter items in the welding information table further include fillet height, welding mode, welding attitude, welding current, welding voltage, part to which the weld belongs, and thickness and material of the part to which the weld belongs.
3. The weld expression method of claim 1, wherein: in step S3, the length of the weld is automatically calculated from the length of the geometric wire frame.
4. The weld expression method of claim 2, wherein: in the step S3, a fillet calculation rule is preset, the fillet height is automatically calculated according to the thickness and material of the part to which the weld belongs and the fillet calculation rule, and the calculated fillet height is checked and fixed.
5. The weld expression method of claim 2, wherein: the weld seam models include fillet weld types and butt weld types, and in step S3, for all the butt weld types of the weld seam models, the fillet height is given to a specific fillet height X, which is different from the fillet height of any other weld seam model; in the step S4, all the butt-welding-type seam models are classified into one type according to the fillet height X, and a color is given to the butt-welding-type seam models.
6. The weld seam expression method according to claim 5, wherein: in the step S4, setting a parameter Y, and classifying fillet welding type weld joint models with leg heights smaller than Y into one type and uniform color as non-key attention parts; and taking the fillet welding type welding seam model with the fillet welding height more than or equal to Y as a key attention part, carrying out different classification according to the fillet welding height, giving different colors according to the different classification, and enabling the colors to be different from the colors of the non-key attention part.
7. The weld expression method of claim 6, wherein: in step S4, for the fillet welding type weld model, the line width of the weld model of the important part is greater than the line width of the weld model of the non-important part.
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| CN113705012A (en) * | 2021-09-01 | 2021-11-26 | 江南造船(集团)有限责任公司 | Processing method, system, equipment and storage medium for welding combination of parts in pipe section |
| CN113705012B (en) * | 2021-09-01 | 2023-12-12 | 江南造船(集团)有限责任公司 | Method, system, equipment and storage medium for processing part welding combination in pipe section |
| CN114119611A (en) * | 2022-01-25 | 2022-03-01 | 季华实验室 | Weld parameter identification method and device, electronic equipment and storage medium |
| CN114119611B (en) * | 2022-01-25 | 2022-04-01 | 季华实验室 | Weld parameter identification method and device, electronic equipment and storage medium |
| CN114888478A (en) * | 2022-06-30 | 2022-08-12 | 中船黄埔文冲船舶有限公司 | Correction method and device for welding process parameters of intermediate assembly |
| CN114888478B (en) * | 2022-06-30 | 2023-12-26 | 中船黄埔文冲船舶有限公司 | Method and device for correcting middle-group welding process parameters |
| CN117444458A (en) * | 2023-12-21 | 2024-01-26 | 深圳杩蚁科技有限公司 | Automatic control method for welding robot |
| CN117444458B (en) * | 2023-12-21 | 2024-03-19 | 深圳杩蚁科技有限公司 | Automatic control method for welding robot |
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