JP7637567B2 - WELDING RECORD CREATION DEVICE, WELDING RECORD CREATION SYSTEM, AND WELDING RECORD CREATION METHOD - Google Patents

Description

The present invention relates to a welding record generation device, a welding record generation system, and a welding record generation method.

Various proposals have been made for devices that record welding operation actions and welding conditions for quality control of welding construction. For example, the device disclosed in Patent Document 1 is characterized by having a welding method designation unit that allows a welding method including the welding groove shape to be selected from a welding method database, a welding record unit that records measurement data during the welding time from the start of welding to the end of welding as welding record data that corresponds to identification numbers that identify each layer and each pass, and a stacking diagram generation unit that creates stacking diagram data in which identification numbers that identify each layer and each pass of the welding record data are written in accordance with the welding order for the welding groove shape, and records the stacking diagram data in correspondence with the welding record data.

The device disclosed in Patent Document 2 is characterized by having a measurement unit that measures the welding motion and welding phenomenon when a welding operator performs welding work, a data analysis unit that extracts appropriate combinations of welding motion feature quantities and welding phenomenon feature quantities based on data acquired by the measurement unit by correlating them with time or coordinates, and a data storage unit that creates a database based on the results extracted by the data analysis unit.

JP 2020-189304 A International Publication No. 2021/009963

It is desirable to associate records of welding operations and welding phenomena during welding with the location where the welding was performed. This allows, for example, if a defect in the welded condition is discovered in a welded body, to quickly access records related to the location where the defect occurred, and to efficiently identify the cause.

The device disclosed in Patent Document 1 allows users to specify the number of layers and passes for multi-layer welding, and narrow down and access welding records for only the specified layer number and pass number from a large volume of welding records, but there is an issue in that it is not possible to trace welding records at any position within a pass.

The device disclosed in Patent Document 2 uses a motion capture system to record the characteristics of welding movements and welding phenomena in association with the position where the welding was performed, but there is an issue in that the motion capture system cannot be applied to welding work in narrow spaces where sensor placement is limited.

In view of the above circumstances, the present invention aims to provide a welding record generation device, welding record generation system, and welding record generation method that can record the motions and welding conditions of a welding operation in association with the position where the welding was performed, even when the welding operation is performed in a narrow area where sensor placement is limited.

In order to achieve the above-mentioned object, the welding record generating device of the present invention is characterized in that it comprises a welding work evaluation unit that reads measurement data of welding work acquired by a welding work measurement device, and generates a time identification number specifying the time of the welding work based on characteristics of the measurement data of the welding work, and creates a time identification number table , a welding bead evaluation unit that generates a position identification number specifying the position of the welding bead based on color information or height information of the welding bead acquired by a welding bead color information measurement device or a welding bead height information measurement device, and creates a position identification number table, and a recording unit that creates and records a comprehensive table that associates the time identification number table created by the welding work evaluation unit and the position identification number table created by the welding bead evaluation unit.

In addition, in order to achieve the above-mentioned object, the welding record generation system of the present invention comprises a welding machine having a welding torch for welding a welded body, a welding work measurement device for measuring welding work, a welding bead evaluation device for evaluating a weld bead, and a welding record generation device connected to the welding machine, the welding work measurement device, and the weld bead evaluation device, wherein the welding record generation device is the welding record generation device configured as described above .

In addition, in order to achieve the above-mentioned object, the welding record generating method of the present invention is characterized by comprising the steps of: a welding work evaluating step of reading measurement data of welding work acquired by a welding work measuring device, and generating a time identification number specifying the time of the welding work based on characteristics of the measurement data of the welding work, to create a time identification number table ; a welding bead evaluating step of generating a position identification number specifying the position of the weld bead based on color information or height information of the weld bead acquired by a weld bead color information measuring device or a weld bead height information measuring device, to create a position identification number table; and a recording step of creating and recording a comprehensive table that associates the time identification number table created in the welding work evaluating step and the position identification number table created in the weld bead evaluating step .

More specific configurations of the present invention are described in the claims.

The welding record generation device according to the present invention can provide a welding record generation device, welding record generation system, and welding record generation method that can record the welding operation motions and welding conditions in association with the position where the welding was performed, even when welding is performed in a narrow area where sensor placement is limited.

Problems, configurations and advantages other than those mentioned above will become clear from the description of the embodiments below.

FIG. 1 is a block diagram showing an example of a welding record generation system including a welding record generation device according to the present invention; A flowchart showing an example of a welding record generating method according to the first embodiment of the present invention. FIG. 1 is a diagram showing an example of a welding operation measured by a welding record generating device; Graph showing change in weaving direction over time A table showing the correspondence between time ID and welding work time in FIG. An example of weld bead color information measurement data acquired by the weld bead color information measurement device 9 A table showing the correspondence between the position ID and the welding direction position in FIG. An example of weld bead height information measurement data acquired by the weld bead color information measurement device 10 A table showing the correspondence between the position ID and the welding direction position in FIG. Illustration of how to generate a join table A flowchart showing an example of a welding record generating method according to a second embodiment. FIG. 10 is an explanatory diagram of a method for calculating the heat input amount in the second embodiment. An example of a display screen of a display unit of a welding record generating device according to a second embodiment

The following describes in detail the form for carrying out the present invention with reference to the drawings. In the following embodiment, the welding operator 12 moves the welding torch 6 to perform manual welding or semi-automatic welding, but the present invention may also be configured to perform automatic welding by moving the welding torch 6 using an automatic travel device.

Figure 1 is a configuration diagram showing an example of a welding record generation system equipped with the welding record generation device of the present invention. As shown in Figure 1, the welding record generation system 100 includes a welding record generation device 1, a welding machine 5, a welding work measurement device 9, and a welding bead evaluation device 13. The welding bead evaluation device 13 has a welding bead color information measurement device 10 and a welding bead height information measurement device 11. The measurement results of the welding work measurement device 9 are transmitted to the welding work evaluation section 2 of the welding record generation device 1. In addition, the measurement results of the welding bead evaluation device 13 are transmitted to the welding bead evaluation section 3 of the welding record generation device 1.

The welding machine 5 is connected to a welding torch 6 that performs the welding work and a welding record generating device 1.

A welding operator 12 slowly moves a welding torch 6 relative to the welded body 7, melting and mixing the welded body 7 and a filler metal (not shown), to form a weld bead 8. The welded body 7 and the filler metal are made of, for example, carbon steel, high-tensile steel, or stainless steel. In a welded body 7 having a V-groove as shown in FIG. 1, a wide weld bead is formed by a weaving motion in which the welding torch 6 is moved perpendicularly (Y direction in FIG. 1) to the welding direction (X direction in FIG. 1).

The welding machine 5 supplies power to the welding torch 6 to generate an arc. An arc is a discharge phenomenon that occurs when a high voltage is applied to a gas, resulting in sustained dielectric breakdown, and is used for welding because it is accompanied by high heat. The welding machine 5 is provided with an operation panel, which allows the welding conditions, such as the power (or welding current, welding voltage) to be supplied, to be set. Since the power supplied by the welding machine 5 may vary depending on the relative position and angle between the welding torch 6 and the welded body 7, the welding machine 5 may be provided with a sensor for measuring the welding current or welding voltage output by the welding machine 5 in order to monitor the power supplied by the welding machine 5.

The welding method of the welded body 7 is, for example, TIG (Tungsten Inert Gas) welding, MIG (Metal Inert Gas) welding, or MAG (Metal Active Gas) welding. TIG welding is a method in which an arc is generated between a tungsten electrode held by a welding torch and the base material, and the surrounding area is surrounded by an inert gas such as argon to protect the material from the effects of oxygen and nitrogen in the atmosphere. MIG welding is a method in which an arc is generated between a metal electrode and the base material, and the surrounding area is surrounded by an inert gas such as argon to perform welding. MAG welding is a method in which an arc is generated between a metal electrode and the base material, and the surrounding area is surrounded by an oxidizing gas to perform welding. In both welding methods, welding is performed while adding filler metal, but while in TIG welding the filler metal is supplied by the welding worker, in MIG and MAG welding the filler metal is supplied automatically, so they are called semi-automatic welding.

The welding operation measuring device 9 is, for example, an optical camera such as a digital camera, and measures the movements of the welding operator 12 and the welding phenomenon. During welding, high-intensity light is emitted from the point where the arc is ignited, so it is necessary to select the optimal measuring device depending on the object to be measured, such as the movements of the welding operation or the welding phenomenon. Considering the characteristics of the arc light, it is preferable to use a camera equipped with a sensor that can receive light with wavelengths from the visible light range to the infrared range. In addition, in order to prevent the occurrence of halation, in which the brightness in the image is saturated due to the arc light, it is preferable to use a camera with a large dynamic range and adjustable exposure. Furthermore, it is preferable to use illumination from an external light source or dimming with an optical filter, as necessary.

When measuring the movements of the welding worker 12, it is desirable to set the field of view to a size that allows the positions of the welding torch 6 and filler metal, as well as the positions of the hands of the welding worker 12 holding them, to be included within the field of view.

When measuring welding phenomena, it is desirable to set the field of view size so that the electrode tip of the welding torch 6 and the position where the filler metal is added are included within the field of view. In addition, when observing the behavior of molten metal, it is desirable to set the frame rate according to the time scale of the melting phenomenon.

The welding operation measuring device 9 is installed using a fixing means such as a tripod. Alternatively, the welding operation measuring device 9 may be installed on welding protective gear worn on the head of the welding operator 12. In this case, welding operations and welding phenomena can be measured even when welding is performed in a narrow space where sensor placement is limited.

The weld bead color information measuring device 10 is, for example, an optical camera such as a digital camera, and captures an image of the surface of the weld bead 8 after the welding work is completed. At this time, it is desirable that the camera position is calibrated with respect to the weld bead 8 so that position information of the weld bead 8 can be obtained. Alternatively, the image may be captured with a calibration scale placed around the weld bead 8 so that calibration can be performed later. Alternatively, the camera may be a line scan camera or the like that is scanned by an automatic driving device to associate the camera position with the image position.

The weld bead height information measuring device 11 is an optical measuring device such as a 3D scanner, a laser displacement meter, or a stereo camera, and measures the height of the weld bead 8 after the welding work is completed. At this time, it is desirable that the position of the optical measuring device is calibrated with respect to the weld bead 8 so that position information of the weld bead 8 can be obtained. Alternatively, the measurement may be performed with a calibration marker or the like placed within the measurement range so that calibration can be performed later. Alternatively, the optical measuring device may be scanned by an automatic traveling device to associate the position of the optical measuring device with the height measurement value.

The weld bead color information measuring device 10 and the weld bead height information measuring device 11 may perform measurements during welding work, similar to the welding work measuring device 9. In that case, it is desirable to use measuring devices that can suppress the effects of arc light, as described for the welding work measuring device 9.

The welding record generating device 1 has a welding work evaluation unit 2, a weld bead evaluation unit 3, and a recording unit 4.

The welding record generating device 1 is a general computer, and includes a central control device, input units such as a mouse and a keyboard, a display unit such as a display, a storage unit such as a memory and a hard disk, and a communication unit. The control unit, which is made up of each processing unit, is operated by executing a program loaded into the storage unit.

The welding work evaluation unit 2 reads the measurement data of the welding work acquired by the welding work measurement device 9, generates a time identification number that specifies the time of the welding work based on the characteristics of the measurement data of the welding work, and creates a time identification number table. The time identification number table will be described in detail later.

The weld bead evaluation unit 3 reads the measurement data from the weld bead color information measurement device 10 or the weld bead height information measurement device 11, generates a position identification number that specifies the position of the weld bead 8 based on the characteristics of the weld bead measurement data, and creates a position identification number table. The position identification number table will be described in detail later.

The recording unit 4 creates and records a combined table that associates the time identification number table created by the welding work evaluation unit 2 with the position identification number table created by the weld bead evaluation unit 3.

Figure 2 is a flowchart showing an example of a welding record generation method according to the first embodiment of the present invention. This flow is executed by the welding record generation device 1.

In step S101, the welding work evaluation unit 2 reads the measurement data of the welding work acquired by the welding work measurement device 9.

In step S102, the welding work evaluation unit 2 generates a time identification number for the welding work based on the characteristics of the measurement data of the welding work acquired by the welding work measurement device 9. Here, a method for generating a time identification number for the welding work will be explained using Figures 3 and 4. Figure 3 is a diagram showing an example of welding work measured by a welding record generation device. Image 21 is an image taken by a fixed camera installed near the welding operator 12, and shows the welding operator 12, welding torch 6, welded body 7, and weld bead 8 during welding work.

Image 21 shows a welding worker 12 moving a welding torch 6 to form a weld bead 8. Image 21 shows a trajectory 23 of an end point 22 of the welding torch 6. The welding worker 12 advances the welding torch 6 in a welding direction 24 while performing a weaving motion in which the welding torch 6 is swung in a weaving direction 25, so the trajectory 23 describes a zigzag trajectory.

The trajectory 23 is extracted by image processing from a time series of images taken by a fixed camera installed near the welding operator 12. Image processing methods include, for example, optical flow, which extracts movement from changes in density distribution on the image, a frame difference method, which extracts movement by calculating the difference between images, and a feature point detection method, which detects the movement of feature points in the image.

Fig. 4(a) is a graph showing the change over time in the weaving direction, and Fig. 4(b) is a table showing the correspondence between time IDs and the welding operation times in Fig. 4(a). Fig. 4(a) shows a result 26 in which the weaving direction position of the end point 22 of the welding torch 6 is plotted against time. Time identification numbers (time IDs) 1, ₂ , and ₃ are assigned to times _t1 , t2, and t3 at which the weaving direction position of the end point 22 of the welding torch 6 is maximized, and a time identification number table 27 is created showing the correspondence between times _t1 , _t2 , and _t3 and the time identification numbers 1, 2, and 3. The time identification numbers in this case correspond to the number of times the welding operator 12 has performed weaving.

Time identification numbers are assigned to times at which characteristics of the time change in the weaving direction position of the end point 22 of the welding torch 6 can be extracted. Therefore, time identification numbers may be assigned to times at which the weaving direction position is at a minimum, or at a time at which the weaving direction position is an intermediate value between the maximum and minimum. Time identification numbers may also be assigned at fixed intervals, such as the 5th, 10th, or 15th time counting from the welding start time. Furthermore, time identification numbers may be assigned to times at which characteristics appear in the amplitude or period of the waveform of the time change in the weaving direction position of the end point 22 of the welding torch 6, such as times when the amplitude of the weaving direction position of the end point 22 of the welding torch 6 is large or small, or times when the period is large or small.

In Figures 3, 4(a) and 4(b), images 21 captured by a camera are used as measurement data of the welding work, but the measurement data of the welding work may be data that measures the movement of the welding operator 12 or the welding phenomenon during the welding work, and may be, for example, acceleration measurement data obtained by an acceleration sensor attached to the welding protective gear or gloves worn by the welding operator 12, or temperature measurement data of the welded body 7 obtained by a radiation thermometer or the like.

In step S103 of FIG. 2, the weld bead evaluation unit 3 reads the measurement data from the weld bead color information measurement unit 10 or the weld bead height information measurement device 11.

In step S104, the weld bead evaluation unit 3 generates a weld bead position identification number from the measurement data of the weld bead color information measurement device 10 or the weld bead height information measurement device 11. Here, a method for generating a weld bead position identification number will be described with reference to Figs. 5 (a), 5(b) and 6 (a) and 6(b) . Fig. 5(a) is an example of weld bead color information measurement data acquired by the weld bead color information measurement device 9, and Fig. 5(b) is a table in which the position ID corresponds to the welding direction position in Fig. 5(a). An image 31 is an image taken by a camera after welding work, and shows a weld bead 8. The camera calibrates its position relative to the welded body 7, so that the correspondence between the position in the image and the position of the weld bead 8 is known. The horizontal direction of the image 31 is the welding direction 24, and the vertical direction is the weaving direction 25.

When welding is performed while weaving the welding torch 6, a weld bead is formed in which scale-like weld marks overlap as shown in Fig. 5 (a) . Therefore, the boundary line of the scale-like weld mark of the weld bead 8 is detected from the image 31, and position identification numbers (position IDs) ₁ , ₂ , and ₃ are assigned to the welding direction positions x1, x2, and x3 at the points where the center line 32 of the weld bead 8 and the boundary line of the weld mark intersect, and a position identification number table 33 is created that shows the correspondence between the welding direction positions _x1 , _x2 , and _x3 and the position identification numbers 1, 2, and 3. The position identification numbers in this case correspond to the number of times the welding operator 12 has performed weaving.

Position identification numbers are assigned to positions where the characteristics of spatial changes in the weld bead 8 can be extracted. Therefore, position identification numbers may be assigned to the upper and lower ends of scale-like weld marks, or to midpoints between the boundaries of weld marks. Position identification numbers may also be assigned at regular intervals, such as the 5th, 10th, or 15th positions counting from the start position of welding. Furthermore, position identification numbers may be assigned to positions where characteristics appear in the width or pitch of the weld bead 8, such as positions where the width of the weld bead 8 is large or small, or positions where the pitch is large or small.

In Fig. 5(a) and Fig. 5(b), the image 31 acquired by the weld bead color information measuring device 9 is used as the measurement data of the weld bead, but the measurement data of the weld bead may be an image acquired by the weld bead color information measuring device 9. Fig. 6(a) is an example of the height information measurement data of the weld bead acquired by the weld bead height information measuring device 10, and Fig. 6(b) is a table in which the position ID and the welding direction position of Fig. 6(a) correspond to each other. Graph 34 is a height profile at the center line of the weld bead 8 measured by the laser displacement meter after the welding operation. The position of the laser displacement meter relative to the welded body 7 is calibrated in advance, and the correspondence between the measurement position and the position of the weld bead 8 is known. Position identification numbers (position IDs) 1, ₂ , and ₃ are assigned to the welding direction positions _x1 , x2, and x3 at which the height is minimum from the graph 34, and a position identification number table 33 is created that shows the correspondence between the welding direction positions _x1 , _x2 , and _x3 and the position identification numbers 1, 2, and 3. The position identification number at this time corresponds to the number of times the welding operator 12 has performed weaving.

7 is an explanatory diagram of a method for generating a combined table. In step S105 of FIG. 2, the recording unit 4 creates and records a combined table 41 by combining the position identification number table 33 created in step S104 and the time identification number table 27 created in step S102, as shown in FIG. 7. Since the scale-like welding marks of the weld bead 8 are correlated with the position when the welding torch 6 is operated, the characteristics of the scale-like welding marks of the weld bead 8 can be associated with the characteristics of the time change in the position of the welding torch 6 extracted in step S102. For example, the time identification number and the position identification number can be associated with each other by referring to the number of times the welding torch 6 has weaved and the number of scale-like welding marks of the weld bead 8. Furthermore, since the amplitude and period of the weaving of the welding torch 6 correspond to the width and pitch of the weld bead 8, the association can be made by referring to these characteristics.

The above-described embodiment provides the following effects. The welding record generating device 1 records in the recording unit 4 a combination table 41 in which the time of welding work is associated with the position of the weld bead 8. As a result, when it is desired to check the welding conditions at a certain position of the weld bead 8, the time when the welding work at that position was performed can be narrowed down by referring to the combination table 41. The present invention makes it possible to identify and refer to any position based on the state of any position within one layer of a weld bead, rather than the average state of one layer of the weld bead.

For example, if a defect in the welded condition is found in a welded body, the measurement data of the welding work associated with the location where the defect occurred can be quickly accessed, allowing efficient investigation of the cause. Similarly, if one wishes to check the welding quality at a certain time during welding work, the connection table 41 can be referenced to narrow down the position of the weld bead 8 associated with that time.

In addition, the present invention can record the characteristics of welding operations and welding phenomena in association with the position where the welding was performed using only a measurement means that can be applied to narrow areas where sensor placement is limited, making it applicable to quality control of welding work in narrow areas.

Figure 8 is a flowchart showing an example of a welding record generation method in Example 2. Steps S101 to S105 are the same as in Example 1. In this example, the heat input is calculated in step S201, and it is determined in step S202 whether the heat input is within a predetermined range. Then, the calculation result of the heat input and the determination result are displayed in step S203.

The amount of heat input is an important parameter that affects the formation of the weld bead 8. A heat input outside the appropriate range can have a detrimental effect on the weld metal and heat-affected zone. If the heat input is excessive, the strength of the weld metal decreases and it becomes more susceptible to cracking. Conversely, if the heat input is too small, rapid cooling can cause deterioration of the base metal structure. Therefore, it is important to adjust the welding operation and welding conditions so that the heat input is within the appropriate range.

Figure 9 is an explanatory diagram of a method for calculating the heat input amount in the second embodiment. The method for calculating the heat input amount in the second embodiment will be described with reference to Figure 9. In step S201, the heat input amount is calculated using the combination table 42 generated in step S105 and the measurement results 52 of the welding current and welding voltage supplied by the welding machine 5. The welding current and welding voltage are measured, for example, by a current sensor and a voltage sensor provided in the welding machine 5.

The heat input q [J/m] is expressed as follows, where I [A] is the welding current, V [V] is the voltage, and v [m/s] is the welding speed:
q=(V×I)/v...Formula (1)
Using this formula, the heat input _qN at the position _xN corresponding to the position identification number N in the combination table 42 is calculated. First, the time _tN corresponding to the position _xN and the time tN _{- 1} corresponding to the position xN-1 are identified from the combination table 42. Next, the average value _IN of the welding current and the average value _VN of the welding voltage at the time _tN are calculated from the measurement results 52 of the welding current and welding voltage. Here, the averaging is performed in the section from time tN _-1 to _tN . Furthermore, the welding speed _vN at the time _tN is calculated as follows: _VN = ( _{xN -} xN _-1 ) / ( _tN - _tN-1 ) ... formula (2)
The heat input qN is calculated from the above I _N , V _N , and v _N using formula (1).

FIG. 10 is an example of a display screen of the display unit of the welding record generating device of the second embodiment. A method of determining and displaying the heat input amount in the second embodiment will be described with reference to FIG. 10. In step S202, it is determined whether the heat input amount is within the appropriate range, and the heat input amount and the determination result are displayed on the display screen 61. FIG. 10 shows an example of the display screen 61. Since the heat input amount in the welding direction _xN exceeds the upper limit of the appropriate range, it is determined that the heat input amount is outside the appropriate range, and a warning of "excessive heat input" is displayed. In addition, a heat map of the heat input amount is displayed superimposed on the color information or height information of the weld bead 8, so that the position where the heat input amount is outside the appropriate range can be visually confirmed.

The above-described embodiment provides the following effects. The welding record generating device 1 records in the recording unit 4 a reference table 51 of heat input in which the heat input of the welding work is associated with the position of the weld bead 8. This allows the heat input at any position of the weld bead 8 to be confirmed by referring to the reference table 51. For example, if a defective weld is found in a welded body, the heat input at the defective position can be confirmed and fed back to the operation and welding conditions of the welding work. In addition, the heat input determining unit of the welding record generating device 1 determines whether the heat input is within the appropriate range and displays the heat input and the determination result on the display unit, so that the welding operator can immediately check whether the welding work is good or bad. If there is heat input outside the appropriate range, the presence or absence of an abnormality at that position can be confirmed and appropriate measures such as disposal or repair can be taken.

As described above, the present invention has been shown to provide a welding record generation device and a welding record generation method that can record the motions and welding conditions of a welding operation in association with the position where the welding was performed, even when the welding operation is performed in a narrow area where sensor placement is limited.

The present invention is not limited to the above-described embodiments, but includes various modified examples. For example, the above-described embodiments have been described in detail to clearly explain the present invention, and are not necessarily limited to those having all of the configurations described. It is also possible to replace part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. It is also possible to add, delete, or replace part of the configuration of each embodiment with other configurations.

The above-mentioned configurations, functions, processing units, processing means, etc. may be realized in hardware, in part or in whole, for example by designing them as integrated circuits. The above-mentioned configurations, functions, etc. may be realized in software by a processor interpreting and executing a program that realizes each function. Information such as the program, table, file, etc. that realizes each function can be stored in a memory, a recording device such as a hard disk or SSD (Solid State Drive), or a recording medium such as an IC (Integrated Circuit) card, SD card, or DVD (Digital Versatile Disc).

In addition, the control lines and information lines shown are those considered necessary for the explanation, and not all control lines and information lines in the product are necessarily shown. In reality, it can be assumed that almost all components are interconnected.

1...welding record generating device, 2...welding work evaluation section, 3...welding bead evaluation section, 4...recording section, 5...welding machine, 6...welding torch, 7...welding object, 8...welding bead, 9...welding work measuring device, 10...welding bead color information measuring device, 11...welding bead height information measuring device, 12...welding operator, 13...welding bead evaluation device, 21...welding work measurement data, 22...welding torch end point, 23...welding torch end point trajectory, 24...welding direction, 25...weaving direction, 26...welding torch weaving direction position measurement data, 27...time identification number table, 31...welding bead color information measurement data, 32...welding bead center line, 33...position identification number table, 34...welding bead height information measurement data, 41...joining table, 51...heat input reference table, 61...display screen.

Claims (7)

a welding work evaluation unit that reads measurement data of the welding work obtained by the welding work measuring device, generates a time identification number specifying a time of the welding work based on characteristics of the measurement data of the welding work, and creates a time identification number table ;
a weld bead evaluation unit that generates a position identification number specifying a position of the weld bead based on color information or height information of the weld bead acquired by the weld bead color information measurement device or the weld bead height information measurement device, and creates a position identification number table;
a recording unit that creates and records a comprehensive table that associates the time identification number table created by the welding work evaluation unit and the position identification number table created by the weld bead evaluation unit . The welding record generating device according to claim 1, characterized in that the recording unit associates the time identification number with the position identification number based on the number of weavings of the welding torch and the number of welding marks on the weld bead. The welding record generation device according to claim 1, characterized in that the welding work evaluation unit generates the time identification number based on the trajectory of the welding torch. a heat input evaluation unit that determines measurement data of the welding operation corresponding to the position identification number of the weld bead based on the record in the record unit, and calculates a heat input corresponding to the position identification number of the weld bead from the measurement data of the welding operation;
4. The welding record generating device according to claim 1 , further comprising: a heat input recording unit that records the heat input corresponding to the position identification number of the weld bead. a heat input amount determination unit that determines whether the heat input amount calculated by the heat input amount evaluation unit is within an appropriate range;
5. The welding record generating device according to claim 4 , further comprising: a display unit that displays the heat input amount and the determination result by the heat input amount determining unit in correspondence with the position of the weld bead. a welding machine having a welding torch for welding a welded body;
a welding work measuring device for measuring welding work;
a weld bead evaluation device for evaluating a weld bead;
a welding record generating device connected to the welding machine, the welding operation measuring device, and the weld bead evaluation device,
The welding record generating system, wherein the welding record generating device is the welding record generating device according to any one of claims 1 to 3 . a welding work evaluation step of reading measurement data of the welding work acquired by a welding work measuring device, generating a time identification number specifying a time of the welding work based on characteristics of the measurement data of the welding work, and creating a time identification number table ;
a weld bead evaluation step of generating a position identification number specifying a position of the weld bead based on color information or height information of the weld bead acquired by the weld bead color information measuring device or the weld bead height information measuring device , and creating a position identification number table ;
a recording step of creating and recording a comprehensive table that associates the time identification number table created in the welding work evaluation step and the position identification number table created in the weld bead evaluation step .

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