CN109460606B - Welding man-hour calculation method based on ship section construction mode - Google Patents
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Abstract
The invention discloses a welding man-hour calculation method based on a ship section building mode, which comprises the following steps of: extracting three-dimensional geometric model, assembly structure level information and welding line information by ship design software; according to the construction process specification and requirements, inputting small assembly, middle assembly and segmented construction modes in a visual interactive interface of a three-dimensional geometric model, acquiring construction datum plane information, calculating relevant angle information of a welding line in a construction state, determining the welding posture of the welding line, determining a welding man-hour correction coefficient, and determining pre-welding preparation time and post-welding processing time; the method is favorable for improving the accuracy and convenience of calculation of related welding line planning working hours, the common discretization jump type determination of the influence coefficient is changed into the continuous determination of the influence coefficient, the improvement of the calculation accuracy of the welding line planning working hours is also favorable for reducing the cost of the welding working hours, and the method is favorable for scientifically and reasonably determining the segmented construction mode.
Description
Technical Field
The invention relates to a management method, in particular to a welding man-hour calculation method based on a ship section building mode, and belongs to the technical field of data management.
Background
The welding work is the most core work of ship and ocean engineering enterprises, the welding working hours have a great influence on the ship construction cost and the construction period, and the improvement of the accuracy and the convenience of the calculation of the welding planning working hours has important significance.
The current mode for calculating the welding man-hour of the ship section generally considers the information of the length of a welding seam, a groove, the plate thickness, the welding posture and the like, combines the rated welding man-hour of an enterprise, and then appropriately increases and decreases to obtain the welding planning man-hour. The welding postures generally comprise different position postures such as horizontal welding, vertical welding, horizontal welding and overhead welding. The welding posture correction coefficient is used for adjusting the working hours through a relatively fixed coefficient and reflecting the difference of the influence of the welding posture on different operations. At present, weld joint information is usually extracted by a ship section design software system in a design finishing stage and comprises welding attitude information; weld information has not been integrated with enterprise welding man-hour quota data.
The welding plan obtained according to the above mode is not accurate enough in man-hour, and cannot fully reflect the specific influence of the sectional actual construction mode on the welding man-hour. Due to the limitation of ship segment design, the building stage and the labor division of personnel, the building mode information contained in a ship segment design software system is difficult to completely and accurately define, and the welding attitude information obtained according to the mode cannot reflect the real welding attitude.
The influence difference of different welding postures on the welding man-hour is up to 80 percent or even higher, the influence of the welding postures on the welding man-hour is considered in detail, and the method has very important significance for accurately calculating the welding man-hour.
Disclosure of Invention
The invention aims to solve the defects of the prior art and provides a welding man-hour calculation method based on a ship section construction mode, which defines construction modes such as section, small assembly, middle assembly and the like, accurately defines the welding posture of each welding seam based on the construction modes, and further determines the welding planning man-hours of each small assembly, middle assembly and section by combining other information of the welding seam and the rated man-hour of enterprise welding; the accuracy of calculation of welding planning man-hours is improved, thereby solving the above-mentioned problems.
In order to solve the technical problems, the invention provides the following technical scheme: a method for calculating welding man-hour based on a ship section construction mode is characterized by comprising the following steps:
s1: extracting three-dimensional geometric model, assembly structure level information and welding line information by ship design software; extracting a geometric model and attribute information of the part by taking a subsection as a unit; extracting segmented assembly level information by adopting a COM (component object model) interface component, wherein the assembly level information comprises part, small assembly, middle assembly and segmented assembly relations; extracting welding seam information through a COM interface component, wherein the welding seam information comprises information of welding seam length, groove, plate thickness and butt joint form;
s2: defining the building modes of small assembly, middle assembly and segmentation according to the building process specifications and requirements; determining small-assembly, middle-assembly and segmented construction modes based on the equipment conditions and the construction process specifications of an enterprise site and in combination with the size, weight and structural characteristics of a constructed object;
s3: inputting the building modes of small assembly, middle assembly and segmentation in the visual interactive interface of the three-dimensional geometric model according to the building mode in the step S2 and in combination with the three-dimensional geometric model extracted in the step S1; according to the obtained three-dimensional geometric model of each part of the segment, the construction modes of small assembly, middle assembly and segment are defined on a visual interactive interface, and the segment turning operation is set. The step of turning over the sections is to avoid difficult overhead welding, the sections need to be turned over by 180 degrees, and the overhead welding after turning over becomes flat welding.
S4: acquiring construction datum plane information according to the three-dimensional geometric model established in the step S3, calculating relevant angle information of the welding line in a construction state, and determining the welding attitude of the welding line;
s5: determining a welding man-hour correction coefficient according to the welding attitude information and other welding seam information acquired in the step S4, and continuously determining the man-hour correction coefficient by adopting a linear interpolation algorithm according to an enterprise correction coefficient standard and a welding inclination angle, so that the man-hour condition of the actual welding operation is more accurately reflected;
s6: determining preparation time before welding and treatment time after welding according to the characteristics of a welding method and equipment; the pre-welding preparation time comprises the time consumed by business contents of preheating, tool preparation and material preparation; the post-welding processing time comprises the time consumed by post-welding cooling, polishing and trimming services;
s7: calculating the welding planning man-hour according to the man-hour correction coefficient determined in the step S4 and by combining the enterprise welding standard man-hour quota database and the pre-welding and post-welding processing time, and calculating the welding planning man-hour of each small assembly according to the welding seam contained in each small assembly; and by analogy, calculating the welding plan working hours of each group, and calculating the segmented welding plan working hours.
As a preferred embodiment of the present invention, the management method further includes a processing step after extracting the segment geometric model information: a. independently acquiring three-dimensional geometric information of each part under segmentation; b. reconstructing a plurality of basic three-dimensional solid models such as rectangles, cylinders and the like through geometrical information; c. forming a more complex three-dimensional part model through Boolean operation among the solid models; d. and converting the part model into a ship body coordinate system through coordinates, combining to form a complete three-dimensional segmented model, and enabling three-dimensional geometric information of each part to be independently accessed.
As a preferred scheme of the invention, the management method further comprises a three-dimensional geometric model visual interactive interface, the constructed segmented three-dimensional geometric model visual interactive interface is realized by adopting an OSG graphic function library technology, the three-dimensional geometric model can be dynamically displayed, and the selection picking and selecting operation can be carried out on single or multiple parts, small groups or assembled segmented components.
The invention has the following beneficial effects: 1. the accuracy and the convenience of the calculation of the planning time of the related welding line are improved. 2. The influence of the construction mode on the planning time can be clarified, and the influence coefficient is continuously determined instead of the common discretization jump determination influence coefficient. 3. The segmental turning-over operation process in the construction mode can be defined, so that the calculation of welding working hours is consistent with the actual construction mode. 4. The operation requirement of the construction mode definition is simplified, a software system can be designed without the requirement, and the definition can be realized through simple operation. 5. The improvement of the calculation accuracy of the welding line planning working hour is also beneficial to reducing the cost of the welding working hour and scientifically and reasonably determining the segmented construction mode.
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 principles of the invention and not to limit the invention.
In the drawings:
FIG. 1 is a schematic diagram of the operation of the present invention;
FIG. 2 is a component reconstruction geometry model of the visualization interface display of the present invention;
FIG. 3 is a block diagram of the segmented assembly level information of the present invention;
FIG. 4 illustrates a set of lateral building patterns defined by the visualization interface of the present invention;
FIG. 5 is a graph distribution diagram of the continuously determinable correction factor of the present invention;
FIG. 6 is a table showing the calculation and summary of the welding schedule man-hour in each assembly phase of the segments;
FIG. 7 is a table showing the planned man-hours for each weld of the segments.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Example (b): as shown in fig. 1 to 7, the present invention provides a method for calculating welding man-hours based on a ship segment building method, comprising the steps of:
s1: extracting three-dimensional geometric model, assembly structure level information and welding line information by ship design software; extracting geometric models and attribute information of parts by taking a section as a unit; and obtaining a complete part three-dimensional geometric model through model reconstruction and model Boolean operation, wherein the three-dimensional geometric information of each part can be independently accessed. Combining a plurality of parts into small assemblies, middle assemblies or segments, wherein a reconstructed geometric model of a segment A11C is shown in FIG. 2; and extracting the assembly level information of the segments by adopting a COM (component object model) interface component, wherein the assembly level information comprises the relation among parts, small assemblies, middle assemblies and segment assemblies, and part of assembly level information of a certain segment A11C is shown in figure 3. The method comprises the steps that welding seam information is extracted through a COM interface component, the welding seam information comprises information of welding seam length, groove, plate thickness and butt joint form, for example, a certain welding seam, the welding seam information comprises the information that the length is 800mm, the groove 1 is I-shaped, the plate thickness 1 is 20mm, the groove 2 is I-shaped, the plate thickness 2 is 20mm, welding seam orientation vector information is that a connection angle is 90 degrees, a rotation angle is 75 degrees, an inclination angle is 75 degrees, and a default building mode is a design tool default forward building mode;
s2: defining the building modes of small assembly, middle assembly and segmentation according to the building process specifications and requirements; determining small-assembly, middle-assembly and segmented construction modes based on the equipment conditions and the construction process specifications of an enterprise site and in combination with the size, weight and structural characteristics of a constructed object; the construction modes comprise a forward construction mode, a reverse construction mode, a side construction mode and the like.
S3: according to the building mode in the step S2 and in combination with the three-dimensional geometric model extracted in the step S1, building modes of small assemblage, middle assemblage and segmentation are input in a visual interactive interface of the three-dimensional geometric model; constructing a visual interactive interface according to the obtained three-dimensional geometric model of each part of the segment, defining the construction modes of small assembly, middle assembly and segment, and setting segment turning-over operation;
taking a certain assemblage as an example, the construction mode is selected to be a side construction, as shown in fig. 4. The determination mode of the construction mode can be selected and determined in batches, and can also be selected and determined singly
S4: acquiring construction datum plane information according to the three-dimensional geometric model established in the step S3, calculating the relative orientation of the welding line by combining a construction mode, and calculating relevant angle information of the welding line in a construction state, wherein the angle information is an inclination angle and a rotation angle; determining the welding attitude of a welding seam, and calculating a welding gun vector; determining the welding seam posture category which comprises different posture types of flat welding, vertical welding, transverse welding and overhead welding and approximate flat welding, approximate vertical welding, approximate transverse welding and approximate overhead welding
S5: determining a welding man-hour correction coefficient according to the welding attitude information and other welding seam information acquired in the step S4, and continuously determining the correction coefficient by adopting a linear interpolation algorithm according to an enterprise correction coefficient standard and a welding inclination angle, so that the man-hour condition of actual welding operation is more accurately reflected, as shown in FIG. 5;
s6: determining preparation time before welding and treatment time after welding according to the characteristics of a welding method and equipment; the pre-welding preparation time comprises time consumed by business contents such as preheating, tool preparation, material preparation and the like; the post-welding processing time comprises the time consumed by post-welding cooling, polishing, trimming and other services;
s7: calculating welding planning man-hour according to an enterprise welding standard man-hour quota database, man-hour correction coefficients and processing time before and after welding, and calculating the welding planning man-hour of each small assembly according to welding seams contained in each small assembly; and analogizing, calculating the welding planning time of each group, calculating the welding of the segments, and considering the operation condition of turning over the segments in the calculation process. The calculation of the welding planning man-hours for minor assemblage, intermediate assemblage and major assemblage taking a certain section as an example is shown in fig. 6-7. Fig. 6 is a partial summary table of the calculation of the welding planning man-hour in each assembly stage of a certain segment a11C, which summarizes the total planned quota length of each type of weld in different welding methods, welding forms, and welding postures according to the segment, the major assembly, the middle assembly, and the minor assembly. FIG. 7 is a detailed table of welding information of each weld in the assembly, which lists the assembly stage, welding method, welding type, welding attitude, plate thickness, length, man-hour correction factor, and planned rated length of each weld.
The ship welding plan man-hour calculation management method provided by the invention can conveniently set a segment construction mode, particularly set a segment turning operation condition, can solve the technical problem that the welding plan man-hour calculation method is inconsistent with the segment construction mode in the existing management method, improves the influence coefficient of the welding attitude on the welding man-hour from discrete jump change into continuous stable change, and better conforms to the actual condition of a welding operation field, thereby further improving the accuracy of the welding plan man-hour calculation.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. A method for calculating welding man-hour based on a ship section construction mode is characterized by comprising the following steps:
s1: extracting three-dimensional geometric model, assembly structure level information and welding line information by ship design software; extracting a geometric model and attribute information of the part by taking a subsection as a unit; extracting segmented assembly level information by adopting a COM (component object model) interface component, wherein the assembly level information comprises part, small assembly, middle assembly and segmented assembly relations; the welding seam information is extracted through a COM interface component, and comprises the information of the length, the groove, the plate thickness and the butt joint form of the welding seam;
s2: defining the building modes of small assembly, middle assembly and segmentation according to the building process specification and requirements; determining small assembly, middle assembly and segmented construction modes based on the equipment conditions and the construction process specifications of an enterprise site and in combination with the size, weight and structural characteristics of a constructed object;
s3: according to the building mode in the step S2 and in combination with the three-dimensional geometric model extracted in the step S1, building modes of small assemblage, middle assemblage and segmentation are input in a visual interactive interface of the three-dimensional geometric model; according to the obtained three-dimensional geometric model of each part of the segment, defining the construction modes of small assembly, middle assembly and segment on a visual interactive interface, and setting segment turning-over operation;
s4: acquiring construction datum plane information according to the three-dimensional geometric model which is established in the step S3 and can be independently accessed by each part, calculating relevant angle information of the welding line in a construction state, and determining the welding attitude of the welding line;
s5: determining a welding man-hour correction coefficient according to the welding attitude information and other welding seam information acquired in the step S4, and continuously determining the man-hour correction coefficient by adopting a linear interpolation algorithm according to an enterprise correction coefficient standard and a welding inclination angle, so that the man-hour condition of actual welding operation is more accurately reflected;
s6: determining the preparation time before welding and the treatment time after welding according to the characteristics of a welding method and equipment; the pre-welding preparation time comprises the time consumed by business contents of preheating, tool preparation and material preparation; the post-welding processing time comprises the time consumed by post-welding cooling, polishing and trimming services;
s7: calculating the welding planning man-hour according to the man-hour correction coefficient determined in the step S4 and by combining the enterprise welding standard man-hour quota database and the pre-welding and post-welding processing time, and calculating the welding planning man-hour of each small assembly according to the welding seam contained in each small assembly; and by analogy, calculating the welding plan working hours of each group, and calculating the segmented welding plan working hours.
2. The method for calculating welding man-hours based on a ship segment building method according to claim 1, wherein the management method further comprises a processing step after extracting segment geometric model information, the processing step being as follows:
independently acquiring three-dimensional geometric information of each part under segmentation;
reconstructing a basic three-dimensional solid model through the geometric information;
forming a more complex three-dimensional part model through Boolean operation among the solid models;
and converting the part model into a ship body coordinate system through coordinates, combining to form a complete three-dimensional segmented model, and enabling the three-dimensional geometric information of the part to be independently accessed.
3. The method for calculating the welding man-hour based on the ship section construction mode is characterized in that the management method further comprises a three-dimensional geometric model visual interactive interface, the constructed three-dimensional geometric model visual interactive interface is realized by adopting an OSG graphic function library technology, the three-dimensional geometric model can be dynamically displayed, and the selection and the picking operation can be carried out on a single or a plurality of parts, small assemblies or assembled section components.
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| CN110814475A (en) * | 2019-12-06 | 2020-02-21 | 山东蓬翔汽车有限公司 | Welding workload calculation method |
| CN111709083B (en) * | 2020-04-30 | 2023-03-07 | 广州文冲船厂有限责任公司 | Method for distinguishing welding direction |
| CN112518740A (en) * | 2020-11-02 | 2021-03-19 | 上海申博信息系统工程有限公司 | Welding process planning method for movement path of robot with assembled structure in ship |
| CN112446094B (en) * | 2020-11-25 | 2023-06-16 | 江南造船(集团)有限责任公司 | Automatic grouping method and system for manufacturing ship pipe fitting family |
| CN113697059B (en) * | 2021-08-11 | 2024-05-28 | 中国舰船研究设计中心 | Flexible design method for sectional connection of water surface ship |
| CN114905179B (en) * | 2022-06-30 | 2024-02-23 | 中船黄埔文冲船舶有限公司 | Middle assembling and assembling method and device based on three-dimensional model |
| 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 |
| CN118470580A (en) * | 2024-07-15 | 2024-08-09 | 舟山中远海运重工有限公司 | Ship part positioning method combining two-dimensional code and three-dimensional map |
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