KR20240047645A - System and method for allocating welding workload considering work skill level - Google Patents

Abstract

A welding workload allocation system and method that considers work proficiency are disclosed. The welding workload allocation system includes a preprocessing unit that generates information about the shape weight and number of welds of each piping spool included in a pre-stored performance drawing document; And using the shape weight, the information on the number of welds, the pre-stored welding performance information, and the design information corresponding to the performance drawing document, a standard welding time per number of welds according to the welding difficulty required during the welding work of each pipe spool. It includes a welding number of hours calculation unit that calculates the number of hours of welding competency, respectively.

Description

{System and method for allocating welding workload considering work skill level}

The present invention relates to a welding workload allocation system and method that takes work skill into account.

To increase productivity, ships and marine structures are manufactured in the shipbuilding industry by block manufacturing and assembly processes. Here, the block manufacturing process is a process in which block assembly operations such as small assembly, mid-assembly, large assembly, and pre-assembly are performed, and may consist of disassembly, mounting, welding, polishing, inspection, etc.

In other words, ships and marine structures are designed for manufacturing, then cut and formed according to the purpose, and steel plates that have gone through a pretreatment process are welded together. At this time, additional design materials such as pipes and supports are welded and placed in each necessary area. In this way, the main task in manufacturing marine structures can be said to be welding.

For welding work, the welding information in the drawing must first be confirmed, and then the appropriate quantity must be distributed considering the number of workers and work skills for each welding team.

However, in actual sites, the person in charge only distributes the welding quantity based on work experience with each welding team, and does not take into account that the welding time varies depending on the skill level of each worker, the different available number of hours for each worker, or the complexity of the pipe shape. This is the situation.

As a result, the worker's skill level is not taken into consideration, and the workload according to the available hours for each welding team is not equalized, resulting in a decrease in work efficiency.

Korean Patent Publication No. 10-2013-0082939 Korean Patent Publication No. 10-2015-0051598

The present invention calculates the total amount of welding work and the welding difficulty per number of welds for each pipe spool based on the drawings of the pipes to be welded, and considering the standard welding hours according to the welding difficulty, each welding team is adjusted to correspond to the available hours of workers for each welding team. And/or by distributing the workload to each worker, it is intended to provide a welding workload allocation system and method that can prevent a decrease in work efficiency by equalizing the workload of the welding team unit and/or worker unit.

The present invention calculates the number of welding competency hours according to welding difficulty based on the welding performance information of each worker, and distributes the workload for each worker by applying the skill weight calculated by comparing the standard welding number of hours and the number of welding competency hours, thereby planning the distribution of work. The purpose is to provide a welding workload allocation system and method that can increase accuracy and reduce time and cost losses due to inaccurate distribution plans.

Other objects of the present invention may be easily understood through the following description.

According to one aspect of the present invention, a preprocessing unit that generates information on the shape weight and number of welds of each pipe spool included in a pre-stored performance drawing document; And using the shape weight, the information on the number of welds, the pre-stored welding performance information, and the design information corresponding to the performance drawing document, a standard welding time per number of welds according to the welding difficulty required during the welding work of each pipe spool. and a welding time calculation unit that calculates the welding capacity time, respectively, wherein the welding difficulty is defined by the welding complexity group to which each pipe spool belongs and the pipe diameter of the corresponding pipe piping spool, and the welding standard number is all pre-stored. The average lead time is calculated for each pipe spool's welding difficulty based on welding performance information, and the welding competency hours are the average lead time for each worker calculated for each worker's welding performance information for each pipe spool's welding difficulty. A workload allocation system is provided.

The pre-processing unit includes a shape recognition unit that assigns the shape weight according to the complexity of each piping spool included in the performance drawing document using a pre-machine-learned shape recognition model; and a text recognition unit that extracts information about the number of welds written in a pre-designated display format corresponding to each piping spool included in the performance drawing document.

The welding number calculation unit includes a clustering processing unit that clusters the pipe spools into a plurality of welding complexity groups by applying the shape weight of the pipe spools included in the performance drawing document and the information on the number of welds to a predetermined clustering model; and classifying the pipe spools belonging to each welding complexity group by pipe diameter to calculate the standard welding number of hours based on each pipe diameter within each welding complexity group, and welding performance information of each worker among the pipe spools belonging to each welding complexity group. Based on , it may include a welding time calculation unit that separates the pipe spools for each worker who performed the welding work and calculates the welding capacity number for each worker based on the diameter of each pipe within each welding complexity group.

The welding workload allocation system includes a workload calculation unit that calculates the welding workload for the work schedule design drawing by adding up the standard welding hours according to the welding difficulty level of spool pipes included in the work schedule design drawing; And it may further include a quantity allocation unit that distributes the amount of welding work to each worker, with reference to the standard welding hours, the welding competency hours, and the pre-stored available hours for each worker.

According to another aspect of the present invention, there is a computer program stored in a computer-readable medium for performing a welding workload allocation method, wherein the computer program causes a computer to perform the following steps, which steps include: (a) Generating information about the shape weight and number of welds of each piping spool included in the saved performance drawing document; (b) Using the shape weight, information on the number of welds, pre-stored welding performance information, and design information corresponding to the performance drawing document, welds per number of welds according to the welding difficulty required during the welding work of each pipe spool. Calculating the standard number of hours and the number of welding competency hours for each worker; (c) calculating the amount of welding work for the work schedule design drawing by adding up the standard welding hours according to the welding difficulty level of the spool pipes included in the work schedule design drawing; and (d) distributing the welding workload to each worker, with reference to the pre-stored available number of hours for each worker, the standard welding number of hours calculated in step (b), and the welding capability number of hours for each worker. A computer program stored on a computer-readable medium is provided.

According to an embodiment of the present invention, the total amount of welding work and the welding difficulty per number of welds for each pipe spool are calculated based on the drawings of the pipes to be welded, and the available number of hours for workers for each welding team is calculated by considering the standard number of welding hours according to the welding difficulty. By distributing the workload to each welding team and/or each worker correspondingly, there is an effect of preventing a decrease in work efficiency by equalizing the workload of each welding team and/or worker.

In addition, the number of welding competency hours according to welding difficulty is calculated based on the welding performance information of each worker, and the workload for each worker is distributed by applying the proficiency weight calculated by comparing the standard welding number of hours and the welding competency number of hours, thereby ensuring the accuracy of the distribution plan. It can increase and also has the effect of reducing time and cost losses due to inaccurate distribution plans.

Other aspects, features and advantages in addition to those described above will become apparent from the following drawings, claims and detailed description of the invention.

1 is a schematic block diagram of a welding workload allocation system according to an embodiment of the present invention.
Figure 2 is a diagram for explaining the operation of a welding number calculation unit according to an embodiment of the present invention.
Figure 3 is a diagram for explaining a quantity allocation process of a quantity distribution unit according to an embodiment of the present invention.
Figure 4 is a flowchart showing a welding workload allocation method considering work skill level according to an embodiment of the present invention.

Since the present invention can make various changes and have various embodiments, specific embodiments will be illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention.

Figure 1 is a schematic block diagram of a welding workload allocation system according to an embodiment of the present invention, Figure 2 is a diagram for explaining the operation of a welding time calculation unit according to an embodiment of the present invention, and Figure 3 is This is a diagram to explain the quantity allocation process of the quantity distribution unit according to an embodiment of the present invention.

Referring to FIG. 1, the welding workload allocation system 100 may include a preprocessing unit 110, a welding time calculation unit 120, a workload calculation unit 130, a quantity allocation unit 140, and a database 150. there is.

Here, each detailed component (eg, preprocessing unit 110, welding time calculation unit 120, etc.) of the welding workload allocation system 100 may be composed of a type of module that performs a designated role. Here, the module may be implemented in the form of a software program, implemented in a hardware configuration such as a Field Programmable Gate Array (FPGA) or Application Specific Integrated Circuit (ASIC), or a combination thereof. Of course, the module is not limited to a software program or hardware, but may be configured to reside on an addressable storage medium, and may be configured to execute on one or more processors. The functionality provided by components and modules may be combined into fewer components and modules or may be further separated into additional components and modules.

The preprocessing unit 110 uses a pre-machine-learned shape recognition model and character extraction function for each piping spool included in each drawing document (i.e., actual drawing document and work scheduled drawing document) stored as drawing data in the database 150. For welding complexity analysis, information on shape weight and number of welds is generated. Information on the shape weight and number of welds corresponding to each pipe spool generated by the preprocessing unit 110 may be stored in the database 150.

Here, the actual drawing document may be a drawing document in which welding work on a pipe spool has already been completed in the field, and the work schedule drawing document may be a drawing document in which welding work on a pipe spool is scheduled to be performed in the field. The performance lead time and information about the welder required for the welding work of each piping spool included in the performance drawing document are welding performance information, and may be stored in advance in the database 150 to correspond to the performance drawing document and the piping spool.

The pre-processing unit 110 may include a shape recognition unit 111 and a text recognition unit 113.

The shape recognition unit 111 may use a pre-machine-learned shape recognition model to assign shape weights to the piping spools in each drawing document stored as drawing data in the database 150 according to complexity.

The shape recognition model can be machine-learned using a pre-specified dataset to give shape weights to piping spools included in drawing documents (i.e., actual drawing documents and work schedule drawing documents) according to shape-based complexity. For example, the shape recognition model can be machine learned to assign a relatively higher shape weight to pipe spools with relatively higher complexity.

Data sets used by the shape recognition model for machine learning include, for example, information on the shape of the pipe spool (e.g., straight pipe spool, curved pipe spool, branched pipe spool, etc.) to learn the complexity of the pipe spool, Shape weight information based on the shape of the pipe spool and the number of welds may be included.

This may require a relatively large number of work hours in the field in cases where the shape of the piping spool shown in the drawing document is unusual or has a large number of branches, and the complexity of each piping spool needs to be managed in order to distribute the appropriate welding volume. Because there is.

The text recognition unit 113 extracts the piping spool ID and welding information (i.e., information regarding the number of welds) written in a pre-designated display format within the drawing document stored as drawing data in the database 150.

Within the drawing document, the piping spool ID may be written in the format of, for example, 'xxxxx-xx-Pxxxx (where x is an arbitrary number)', and the welding information may be 'W1' or 'W2' to correspond to the number of welds. It can be written in a format such as '. Here, it is natural that the format and location for recording the piping spool ID, welding information, etc. may be specified in various other ways, and may also be specified to be written in various formats depending on the attributes. For example, welding information may be individually written to correspond to the pipes shown, but may also be collected and written in the upper left part of the drawing document.

The welding time calculation unit 110 uses the information on the shape weight and number of welds corresponding to each of the pipe spools generated by the preprocessing unit 110 for the performance drawing document, and calculates the number of welds of the pipe spool in the field. As the average time required for one welding operation (i.e., per number of welds), the standard number of welding hours per number of welds according to the welding difficulty is calculated.

In addition, the welding time calculation unit 120 further calculates the number of welding competency hours of each worker for each welding case according to the welding difficulty, based on the welding performance information of each worker (see (b) of FIG. 3).

Here, the welding difficulty is defined by the welding complexity group and the pipe diameter, and the welding standard number of hours and the welding competency index are calculated for each pipe diameter of the pipe spool for the welding complexity group.

Information on the standard welding hours per number of welds according to the welding difficulty calculated by the welding hours calculation unit 120 and the number of welding competency hours for each worker may be stored in the database 150.

The welding time calculating unit 120 may include a clustering processing unit 121 and a welding time calculating unit 123.

The clustering processing unit 121 applies a pre-specified clustering model to the shape weight and information on the number of welds corresponding to each pipe spool generated from the performance drawing document to divide the pipe spools into a plurality of welding complexity groups. Cluster (see Figure 2 (a) and (b)). Here, the clustering model may be an unsupervised learning model that groups similar information and represents it as a cluster.

The welding time calculation unit 123 classifies the pipe spools belonging to each welding complexity group clustered by the clustering processing unit 121 by pipe diameter, and calculates the standard welding time per number of welds based on each pipe diameter in each welding complexity group. Calculate (see (c) in Figure 2).

The welding time calculation unit 123 may calculate the average value of the performance lead time per number of welds pre-stored in the database 150 for each pipe spool for each pipe diameter within each welding complexity group as the standard welding time. For example, if the performance lead time required for welding work in the field as a pipe spool for a specific pipe diameter included in a specific welding complexity group is stored in the database 150 as 0.5H, 0.3H, and 0.4H, respectively. , the standard welding time can be calculated as 0.4H (=(0.5+0.3+0.4)/3).

In addition, the welding time calculation unit 123 separates the welded pipe spools for each worker based on the pre-stored welding performance information of each worker among the piping spools belonging to each welding complexity group clustered by the clustering processing unit 121. And, the number of welding competency hours per number of welds according to the welding difficulty level for each worker is further calculated (see (b) in Figure 3).

Here, the standard number of welding hours is calculated based on the welding difficulty (i.e., the welding complexity group to which it belongs and the pipe diameter of the pipe spool) using all welding performance information accumulated up to that point (i.e., welding performance information of all workers). This is the average lead time. In comparison, the number of welding competency hours uses the welding performance information accumulated up to that point for each worker individually, and there is a difference in the average lead time based on the welding difficulty for each worker.

In other words, the standard welding time is the average lead time generally required during welding work depending on the welding difficulty of the pipe spool, while the welding competency time is the average lead time required when the worker welds the same pipe spool. Assuming that the same pipe spool is welded, a worker with relatively fewer welding competency hours compared to the standard number of welding hours may be recognized as a relatively more skilled worker.

The workload calculation unit 130 recognizes the welding complexity group corresponding to each spool pipe using information on the shape weight and number of welds for each spool pipe included in the work schedule design drawing analyzed by the preprocessing unit 110. And, by referring to the welding complexity group to which each spool pipe corresponds and the diameter information of each spool pipe pre-stored as design information in the database 150, the standard number of welding operations based on the welding difficulty of the spool pipes is added, and the work schedule design drawing is drawn. Calculate the corresponding amount of welding work.

If there are multiple work schedule design drawings, the workload calculation unit 130 may calculate the welding workload by collecting all the welding workloads calculated for each work schedule drawing document.

The quantity allocation unit 140 calculates the welding workload calculated in the workload calculation unit 130 by considering the standard welding hours according to the welding difficulty of each pipe spool, the welding competency hours according to the welding difficulty of each worker, and the available hours of each worker. Distribute to each worker (see Figure 3).

At this time, the quantity allocation unit 140 distributes the workload to the workers based on the standard welding hours of pipe spools with the worker's available hours as a limit. However, if the welding competency hours are calculated based on the welding performance information of the worker, the standard welding hours are The workload can be distributed to each worker by applying the proficiency weight calculated based on the number of welding competency hours.

For example, a pipe spool named PP0001, interpreted as a specific weld difficulty (e.g., shape weight 0.8, number of welds 4, pipe diameter Ø35) and a weld standard number of hours of 0.4H (see (a) in Figure 3). ), the quantity allocation unit 140 may assign the work to worker Hong Gil-dong (see (b) of FIG. 3) who shows a welding competency number of 0.2H.

In this case, since the welding competency hours of 0.2H are smaller than the standard welding hours of 0.4H, showing excellent skill, the quantity allocation unit 140 applies a skill weight of 0.5 (=0.2/0.4) to select 0.2H of the available hours of the worker. The workload can be distributed by recognizing it as the amount of work required. However, if the worker shows welding competency hours of 0.6H, which is inferior to the standard welding hours of 0.4H, the quantity allocation unit 140 applies a proficiency weight of 1.5 (=0.6/0.4) to select 0.6H of welding competency hours among the worker's available hours. The workload can be distributed by recognizing it as only 0.6H of work.

In this way, when distributing the workload for the welding work of the pipe spool, the quantity allocation unit 140 comprehensively considers the standard number of welding hours according to the welding difficulty of each pipe spool, the available number of hours for each worker, and the number of welding capabilities. The daily workload can be distributed to each worker or each welding team, and this has the feature of achieving equalization of the workload in each welding team unit and each worker unit.

The database 150 includes each drawing document (i.e., actual drawing document and work scheduled drawing document) and design information corresponding to each drawing document, as well as the shape weight and number of welds corresponding to each piping spool generated in the preprocessing unit 110. Information on each worker's welding performance, information on the standard number of welding hours per number of welds according to welding difficulty, and information on the number of welding competency hours for each worker can be stored.

Figure 4 is a flowchart showing a welding workload allocation method considering work skill level according to an embodiment of the present invention.

Referring to FIG. 4, in step 410, the welding workload allocation system 100 uses the welding performance information of all workers accumulated and stored in the database 150 to determine the welding difficulty level of each pipe spool included in the performance drawing document (i.e. , the weld complexity group to which it belongs and the pipe diameter of the pipe spool) to calculate the standard number of welds per number of welds.

To this end, using a pre-machine-learned shape recognition model and character extraction function, information on the shape weight and number of welds will be generated to analyze the welding complexity of each piping spool included in the performance drawing document stored in the database 150. You can.

In addition, the piping spools are clustered into multiple welding complexity groups by applying a pre-specified clustering model to the shape weight and number of welds corresponding to each piping spool created from performance drawing documents, and each clustered weld By classifying pipe spools belonging to a complexity group by pipe diameter, the standard number of welding hours per number of welds based on each pipe diameter within each welding complexity group can be calculated.

In step 420, the welding workload allocation system 100 separates the piping spools belonging to each clustered welding complexity group into each worker according to pre-stored welding performance information, and calculates the number of welds according to the welding difficulty based on each worker. Calculate welding competency hours.

The standard welding hours calculated in step 410 are the average lead time generally required for welding work according to the welding difficulty of the pipe spool calculated for all workers, while the welding competency hours calculated in step 420 are the average lead time calculated for all workers. There is a difference in the average lead time required when welding the same spool of pipe.

In step 430, the welding workload allocation system 100 calculates the welding workload based on the work schedule drawing.

To this end, the welding workload allocation system 100 can generate information about the shape weight and number of welds for each spool pipe included in the work schedule design drawing using a pre-machine-learned shape recognition model and character extraction function. there is.

In addition, the welding complexity group corresponding to each spool pipe is recognized using the generated shape weight and information on the number of welds, and the welding complexity group to which each spool pipe corresponds and the spool pipe pre-stored as design information in the database 150 By adding up the standard welding hours of the spool pipes with reference to the diameter information of each, the amount of welding work corresponding to the work schedule design drawing can be calculated.

In step 440, the welding workload allocation system 100 allocates the welding workload to each worker by considering the standard welding hours according to the calculated welding workload, the available hours of each worker, and the number of welding competency hours.

At this time, the welding workload allocation system 100 distributes the workload to workers based on the standard welding hours of pipe spools with the worker's available hours as a limit. If the welding competency hours are calculated based on the welding performance information of the worker, the welding standard hours are calculated. The workload can be distributed to each worker by applying the skill weight calculated by comparing the number of hours and the number of welding competency hours.

As described above, the welding workload allocation system and method calculates the total welding workload and the welding difficulty per number of welds for each pipe spool based on the piping drawings to be welded, and considers the standard number of welding hours according to the welding difficulty, so that the workers for each welding team By distributing the workload for each welding team and/or each worker to correspond to the available hours, the workload for each welding team and/or worker is equalized to prevent a decrease in work efficiency.

In addition, the present invention calculates the number of welding competency hours according to the welding difficulty based on the welding performance information of each worker, and distributes the workload for each worker by applying the proficiency weight calculated by comparing the standard welding number of hours and the number of welding competency hours. There are also features that can increase the accuracy of the distribution plan.

In addition, it is natural that the above-described welding workload allocation method may be implemented as a software program, application, etc. built into a digital processing device and performed as an automated procedure in a time-serial order. Codes and code segments constituting the program, etc. can be easily inferred by a computer programmer in the field. Additionally, the program is stored in a computer-readable information storage medium and is read and executed by a computer to implement the method.

Although the present invention has been described above with reference to embodiments, those skilled in the art can make various modifications and changes to the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. You will understand that you can do it.

100: Welding workload allocation system 110: Pretreatment unit
111: shape recognition unit 113: text recognition unit
120: Welding time calculation unit 121: Clustering processing unit
123: welding time calculation unit 130: workload calculation unit
140: Quantity allocation unit 150: Database

Claims (5)

A preprocessing unit that generates information about the shape weight and number of welds of each piping spool included in the pre-stored performance drawing document; and
Using the shape weight, the information on the number of welds, the pre-stored welding performance information, and the design information corresponding to the performance drawing document, the standard number of welding operations per number of welds according to the welding difficulty required during the welding work of each pipe spool Includes a welding number calculation unit that calculates the number of welding competency hours,
The welding difficulty is defined by the welding complexity group to which each pipe spool belongs and the pipe diameter of the corresponding pipe spool,
The welding standard number of hours is the average lead time calculated for each welding difficulty of the pipe spool based on all pre-stored welding performance information, and the welding competency number of hours is calculated for each welding difficulty of the pipe spool based on the welding performance information for each operator. Welding workload allocation system, which is the average lead time for each worker. According to paragraph 1,
The pretreatment unit is,
a shape recognition unit that assigns the shape weight according to the complexity of each pipe spool included in the performance drawing document using a pre-machine-learned shape recognition model; and
A welding workload allocation system comprising a text recognition unit that extracts information about the number of welds written in a pre-designated display format corresponding to each piping spool included in the performance drawing document. According to paragraph 2,
The welding number calculation unit is,
a clustering processor that clusters the pipe spools into a plurality of welding complexity groups by applying the shape weight and the information on the number of welds of the pipe spools included in the performance drawing document to a pre-designated clustering model; and
The pipe spools belonging to each welding complexity group are classified by pipe diameter, the standard welding number of hours is calculated based on each pipe diameter within each welding complexity group, and the welding performance information of each worker is obtained from the pipe spools belonging to each welding complexity group. A welding work load allocation system comprising a welding time calculation unit that separates pipe spools for each worker who performed welding work based on each worker and calculates the welding capacity number for each worker based on the diameter of each pipe in each welding complexity group. According to paragraph 1,
a workload calculation unit that calculates a welding workload for the work schedule design drawing by adding up the standard welding hours according to the welding difficulty level of the spool pipes included in the work schedule design drawing; and
A welding workload allocation system further comprising a quantity allocation unit that distributes the welding workload to each worker with reference to the standard welding hours, the welding competency hours, and the pre-stored available hours for each worker. A computer program stored on a computer-readable medium for performing a welding workload allocation method, wherein the computer program causes a computer to perform the following steps, said steps comprising:
(a) generating information about the shape weight and number of welds of each piping spool included in the pre-stored performance drawing document;
(b) Using the shape weight, information on the number of welds, pre-stored welding performance information, and design information corresponding to the performance drawing document, welds per number of welds according to the welding difficulty required during the welding work of each pipe spool. Calculating the standard number of hours and the number of welding competency hours for each worker;
(c) calculating the amount of welding work for the work schedule design drawing by adding up the standard welding hours according to the welding difficulty level of the spool pipes included in the work schedule design drawing; and
(d) a computer comprising the step of distributing the welding workload to each worker, referring to the pre-stored available number of hours for each worker, the standard welding number of hours calculated in step (b), and the welding capability number of hours for each worker; -A computer program stored on a readable medium.