KR101345013B1 - Submerged arc welding apparatus and one-side welding apparatus - Google Patents

Abstract

Provided are a submerged arc welding device and a one-sided welding device which facilitate the tracking and analysis of the cause of the welding failure by recording the welding condition and the device condition at the same time.
The submerged arc welding apparatus includes a welding torch 25, a welding traveling trolley 20, a traveling rail 10, a welding power source 27, a sensor 26, a welding control means 21, The driving drive means 22 and the imitation drive means 23 are provided, and the welding control means 21 instructs the driving drive means 22 to drive in the improved longitudinal direction of the welding traveling cart 20. In addition, a driving instruction unit 212 for instructing the imitation drive means 23 to drive in the improved width direction of the welding travel truck 20 in accordance with the improved position detected by the sensor 26, and the travel distance and the welding current. And a writing unit 215 for writing the measurement values of the welding voltages in association with each other and for writing the driving distances and the imitation positions in association with each other.

Description

SUBMERGED ARC WELDING APPARATUS AND ONE-SIDE WELDING APPARATUS}

The present invention relates to a submerged arc welding device and a one-sided welding device for welding a member to be welded, such as a metal plate.

Conventionally, as a method of analyzing the welding defect (welding defect) at the time of welding, the method of analyzing the welding conditions, such as a welding current and a welding voltage, at the time of the said welding defect occurring was used. For example, Patent Literature 1 includes data storage means for storing detection signals such as welding current or welding voltage, and operation trajectory storage means for storing the operation trajectory of the robot. The arc welding monitor which can grasp | ascertain easily how detection data, such as welding voltage, respond | corresponds is proposed.

(Prior art technical literature)

(Patent Literature)

(Patent Document 1) Japanese Unexamined Patent Publication No. 11-58007

However, the arc welding monitor according to Patent Document 1 is for an arc welding robot, and at the time of submerged arc welding, welding conditions such as welding current or welding voltage have not been recorded. Therefore, in the field of submerged arc welding, even if a welding defect was found after welding, the welding condition at the time of the said welding defect could not be confirmed.

In addition, even in the field of submerged arc welding, a welding power source having a logging function of welding state such as welding current or welding voltage exists, but it is impossible to detect and record the device state such as the position of the welding apparatus in the welding power source. . Therefore, for example, when the cause of a welding defect exists in an apparatus situation, there existed a problem that the cause of a welding defect cannot be tracked and analyzed.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and simultaneously records the welding conditions such as the welding current and the welding voltage, and the device conditions such as the position of the welding apparatus, thereby making it easier to track and analyze the cause of the welding failure. It is a problem to provide a welding device and a one-sided welding device.

MEANS TO SOLVE THE PROBLEM In order to solve the said subject, the submerged arc welding apparatus which concerns on this invention is a submerged arc welding apparatus which welds a groove back to a to-be-welded member, The welding which supplies a wire with respect to the said improvement. A power supply is supplied to the torch, the welding traveling bogie supporting the welding torch, the traveling rail supporting the welding traveling bogie so as to run, the welding torch and the member to be welded, and the welding current and the welding voltage are detected. A welding power source, a sensor that is supported by the welding travel cart and detects an improved position prior to the welding torch, welding control means for controlling the movement of the welding travel cart, and instructions for the welding control means. Therefore, the welding traveling cart is driven in the improved longitudinal direction, and the welding traveling cart is in the improved longitudinal direction. The traveling drive means which detects the travel distance which shows the movement amount in this, and the said welding travel truck are driven in the improvement width direction which is a direction orthogonal to the said improvement longitudinal direction according to the instruction | indication of the said welding control means, Imitation driving means for detecting a copying position indicating an amount of movement in the improved width direction of the welding direction, wherein the welding control means instructs the traveling driving means to drive the welding traveling truck in the improved longitudinal direction. And a driving instruction unit for instructing the imitation drive means to drive the welding travel truck in the improvement width direction according to the improvement position detected by the sensor, the travel distance detected by the travel drive means; Correlate and fill in the measured values of welding current and welding voltage detected by the welding power supply. In addition, it was set as the structure provided with the writing part which correlates and records the said travel distance which the said driving drive means detected, and the imitation position which the said imitation drive means detected.

The submerged arc welding device having such a configuration simultaneously and simultaneously writes data of the welding situation consisting of measured values of the welding current and the welding voltage, and data of the device situation consisting of the traveling distance and the imitation position of the welding travel truck. Can be.

Moreover, the single-sided welding apparatus which concerns on this invention is a single-sided welding apparatus which welds the improvement back to a to-be-welded member from a single side, The welding torch which supplies a wire with respect to the improvement, The welding traveling trolley which supports the said welding torch, It is supported by a travel rail for supporting the welding travel truck to be able to travel, a welding power supply for supplying electric power to the welding torch and the member to be welded, detecting a welding current and a welding voltage, and the welding travel truck. And a sensor for detecting an improvement position prior to the welding torch, welding control means for controlling movement of the welding travel bogie, and driving the welding travel bogie in the improvement longitudinal direction according to the instruction of the welding control means. In addition, the traveling distance which shows the movement amount in the said improvement longitudinal direction of the said welding traveling trolley | bogie According to the instruction | indication of the traveling drive means and the said welding control means to drive | release, the said driving travel truck is driven to the improvement width direction which is a direction orthogonal to the said improvement longitudinal direction, and in the said improvement width direction of the said welding travel truck Imitation drive means which detects the imitation position which shows the movement amount, and the back support apparatus arrange | positioned on the opposite side to the said improvement, The said welding control means is the said drive control means to the improvement longitudinal direction of the said welding travel trolley | bogie. A drive instruction unit for instructing driving and instructing the imitation drive means to drive the welding travel truck in the improved width direction according to the improved position detected by the sensor; and the drive detected by the travel drive means. Fill in the travel distance and the measured values of welding current and welding voltage detected by the welding power source. In addition, it was set as the structure provided with the writing part which correlates and records the said travel distance which the said driving drive means detected, and the imitation position which the said imitation drive means detected.

The single-sided welding device having such a configuration can simultaneously write data related to the welding situation including the measured values of the welding current, the welding voltage, and the like, and data of the device situation consisting of the traveling distance and the imitation position of the welding travel truck. .

According to the submerged arc welding device and the single-sided welding device according to the present invention, the data of the welding situation consisting of the measured value of the welding current and the welding voltage, etc., and the data of the device situation consisting of the traveling distance or the imitation position of the welding travel truck are simultaneously used. In addition, since the recording can be performed in association with each other, even if a welding failure is found after performing submerged arc welding, the cause of the welding failure can be easily tracked and analyzed.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram which shows the whole structure of the single-sided welding apparatus which concerns on embodiment of this invention.
It is a block diagram which shows the welding control means with which the single-sided welding apparatus which concerns on embodiment of this invention is equipped, and the structure around it.
3 is a view for explaining an example in the case of welding a normal metal plate by the one-side welding device according to an embodiment of the present invention, (a) is a graph showing the welding state data at the time of abnormality, (b) Is a graph showing the device status data at the time of abnormality.
4 is a view for explaining an example in the case of welding a normal metal plate by a one-side welding device according to an embodiment of the present invention, (a) is a graph showing the welding state data at the normal time, (b) Is a graph showing the device status data at normal time.
FIG. 5 shows an example in the case where a corner in the form of a BOX column is welded by a corner welding device in the form of a BOX column having the same configuration as the one-side welding device according to the embodiment of the present invention (excluding the back support device). As a figure to publish, (a) is a graph which shows the welding situation data at the time of abnormality, (b) is a graph which shows the apparatus situation data at the time of abnormality.
FIG. 6 shows an example in the case where a corner in the form of a BOX column is welded by a corner welding device in the form of a BOX column having the same configuration as the one-side welding device according to the embodiment of the present invention (except for the back support device). As a figure to publish, (a) is a graph which shows the welding condition data at the time of normal, and (b) is a graph which shows the apparatus condition data at the time of normal.

Hereinafter, the submerged arc welding apparatus which concerns on embodiment is demonstrated, referring drawings. Submerged arc welding apparatus is an apparatus which generates an arc between a wire and a to-be-welded member in a flux, by spraying a particle | grain flux on the improvement previously, and automatically transmitting a wire in it. Here, although the submerged arc welding apparatus includes the thing of various structures, in the following description, it demonstrates taking a single side welding apparatus as an example.

The single-sided welding device 100 is, for example, a device for welding improvement V backed from a single side to a plurality of to-be-welded members 1 in welding a large plate. As shown in FIG. 1, the one-side welding device 100 includes a welding travel truck 20 that travels along the longitudinal direction of the travel rail 10 as a main configuration. Moreover, the single-sided welding apparatus 100 is further provided with the back support apparatus 30 which pushes a flux in the back side of the improvement V of the to-be-welded member 1 on the travel rail 10. Moreover, although the single-sided welding apparatus 100 is equipped with the flux supply apparatus which supplies a flux with respect to the welding point of the to-be-welded member 1, and the flux collection | recovery apparatus which aspirates and collect | recovers the flux which remained after completion | finish of welding, FIG. In Fig. 1, illustration is omitted.

The traveling rail 10 is for the welding traveling truck 20 to travel. The traveling rail 10 is constructed along the improvement longitudinal direction which is the longitudinal direction of the improvement V of the to-be-welded member 1. Moreover, as shown in FIG. 1, the running rail 10 is formed in the cross-sectional rectangular shape, for example, is comprised from the metal material with high rigidity.

The welding traveling trolley 20 welds the improvement V of the to-be-welded member 1, traveling along the longitudinal direction of the traveling rail 10. As shown in FIG. 1, the welding traveling trolley 20 is supported by the traveling rail 10 so as to be able to travel in the longitudinal direction of the traveling rail 10 via the traveling driving means 22.

As shown in FIG. 1, the weld traveling trolley 20 is a head whose one end is fixed to the bogie body 20a and the lower portion of the bogie body 20a and the other end extends to the welded member 1. It consists of the frame 20b. Moreover, as shown in FIG. 1, the trolley | bogie main body 20a is equipped with the welding control means 21, the traveling drive means 22, the imitation drive means 23, and the wire supply apparatus 24, The head frame 20b is provided with the welding torch 25 and the sensor 26. Hereinafter, each element of the trolley | bogie main body 20a and the head frame 20b is demonstrated concretely.

The welding control means 21 controls the movement of the welding traveling truck 20. As shown in FIG. 2, the welding control means 21 here includes a correction amount calculating unit 211, a driving instruction unit 212, a signal generating unit 213, a current voltage control unit 214, and a writing unit ( 215 and a recording unit 216 are provided. In addition, although the welding control means 21 is provided in the inside of the trolley | bogie main body 20a here as shown in FIG. 1, you may provide it to the exterior of the trolley | bogie main body 20a.

The correction amount calculation unit 211 calculates a correction amount for moving the welding travel truck 20 in the improvement width direction. That is, when the improvement V inclines with respect to a welding progress direction, the correction amount calculation part 211 calculates the imitation correction amount for moving the welding run truck 20 to the improvement width direction, and imitating the said improvement V. As shown in FIG. Specifically, the correction amount calculation unit 211 calculates the deviation of the improvement V by taking the difference between the improvement position detected by the sensor 26 and the welding travel direction of the welding travel truck 20, and further improves the improvement V. The correction amount corresponding to the misalignment of is calculated. In addition, the shift | offset | difference of improvement V here means more specifically the distance of the improvement width direction between an improvement position and a welding progress direction.

2, the improvement position is input from the sensor 26 as shown in FIG. The correction amount calculation unit 211 calculates the correction amount by the above-described method, and outputs the correction amount to the driving instruction unit 212 as shown in FIG. 2.

The drive instruction unit 212 gives a drive instruction to each drive means 22 and 23 of the welding traveling truck 20. The drive instructing section 212 is configured of, for example, a servo amplifier, and instructs the travel drive means 22 to drive the welding travel truck 20 in the longitudinal direction of the improvement V (hereinafter referred to as the improvement longitudinal direction). In addition, the imitation drive means 23 is instructed to drive the welding traveling truck 20 in a direction orthogonal to the longitudinal direction of the improvement V (hereinafter referred to as the improvement width direction).

Specifically, the driving instruction unit 212 generates a driving driving instruction for driving the welding traveling trolley 20 in the improved longitudinal direction in accordance with a predetermined movement amount in consideration of welding conditions of the welded member 1, and the like. By outputting this to the traveling drive means 22, the welding traveling truck 20 is driven in the improved longitudinal direction. In addition, the drive instruction unit 212 generates an imitation drive instruction for driving the welding traveling truck 20 in the improvement width direction according to the correction amount (imitation correction amount) calculated by the correction amount calculation unit 211, and this imitation drive means. By outputting to 23, the welding run truck 20 is driven to the improvement width direction.

In addition, the drive instruction | indication part 212 outputs the operation flag ON signal which the signal generation part 213 produces | generates when the one-side welding apparatus 100 starts welding, and the welding drive truck 20 is carried out. ) Mimic operation. On the other hand, the drive instruction part 212 outputs the operation flag OFF signal which the signal generation part 213 produces | generates to the imitation drive means 23, when the welding run truck 20 reaches the terminal of the improvement V, and it welds running. The imitation operation of the trolley 20 is terminated.

As shown in FIG. 2, the drive instructing unit 212 generates a drive driving instruction, and outputs it to the drive driving means 22. 2, the correction amount is input from the correction amount calculating unit 211 as shown in FIG. 2. And the drive instruction | command part 212 produces | generates the imitation drive instruction by the above-mentioned method, and outputs it to the imitation drive means 23 as shown in FIG.

In addition, as shown in FIG. 2, while the travel distance of the welding travel truck 20 is input from the travel drive means 22 to the drive instruction | indication part 212, the welding travel truck 20 from the imitation drive means 23 is carried out. The mimic position of is entered. Then, the drive instructing unit 212 outputs these to the writing unit 215, as shown in FIG.

The signal generator 213 generates a signal of whether the sensor 26 is operating and a signal of whether the welding traveling truck 20 is performing a copying operation. Specifically, the signal generator 213 generates an operation flag ON signal when the one-side welding device 100 starts welding, and as shown in FIG. 2, the signal generator 213 generates the operation flag ON signal. By outputting to the imitation drive means 23 via 212, the imitation operation | movement of the welding traveling truck 20 is started. On the other hand, the signal generation unit 213 generates an operation flag OFF signal in accordance with the termination signal input from the sensor 26. As shown in Fig. 2, the signal generation unit 213 supplies the operation flag OFF signal to the driving instruction unit 212. By outputting to the imitation drive means 23 via, the imitation operation | movement of the welding traveling truck 20 is complete | finished. In addition, the termination signal means that the signal is generated when the sensor 26 detects the termination of the improvement V of the member 1 to be welded.

In addition, the signal generating unit 213 generates a sensor ON signal when starting welding, and outputs the sensor ON signal to the recording unit 216 via the writing unit 215 as shown in FIG. 2. . On the other hand, the signal generator 213 generates a sensor OFF signal in accordance with the termination signal input from the sensor 26, and as shown in FIG. 2, the sensor OFF signal is recorded through the write unit 215. Output to (216).

The signal generator 213 generates an operation flag ON signal and a sensor ON signal. As shown in FIG. 2, the signal generator 213 outputs an operation flag ON signal to the drive instructing unit 212 and the writing unit 215, and the sensor ON signal. Is output to the writing unit 215.

In addition, as shown in FIG. 2, the signal generation unit 213 receives an end signal from the sensor 26. The signal generator 213 generates an operation flag OFF signal and a sensor OFF signal by the above-described method, and as shown in FIG. 2, the driving instruction OFF unit 212 and the writing unit 215 transmit the operation flag OFF signal. The sensor OFF signal is output to the writing unit 215.

The current voltage control unit 214 controls the welding current and the welding voltage. As shown in FIG. 2, the setting value of the welding current and the welding voltage is input to the current voltage control unit 214, and the measured value of the welding current and the welding voltage from the welding power supply 27 (feedback). Current and feedback voltage are respectively input at predetermined sampling intervals (for example, 50 msec to 100 msec).

The current voltage control unit 214 generates an instruction to increase or decrease the welding current or an instruction to increase or decrease the welding voltage so that the welding current and the welding voltage coincide with the above-described set values, and outputs them to the welding power source 27. Control the welding current and welding voltage. In addition, as shown in FIG. 2, the current voltage control unit 214 frequently outputs the measured values of the welding current and the welding voltage input from the welding power supply 27 to the writing unit 215. The set value input means 40 is, for example, an operation panel provided outside the single-sided welding apparatus 100, and the set values of the welding current and the welding voltage are input by the operator (user).

The writing unit 2 (15) writes in the recording unit 216 each part in the welding control means 21, or a value generated or detected by each means around the welding control means 21 and each device. Specifically, as shown in FIG. 2, the writing unit 215 generates a sensor signal (sensor ON signal and sensor OFF signal) and an operation flag signal (operation flag ON signal and operation flag) generated by the signal generation unit 213. OFF signal), the travel distance of the welding travel trolley 20 detected by the travel drive means 22, the imitation position of the welding travel trolley 20 detected by the imitation drive means 23, and the welding power supply 27 The measured values of the detected welding current and the welding voltage and the wire feeding speed detected by the wire feeding device 24 are written in the recording unit 216. In addition, the traveling distance here means the movement amount in the improvement longitudinal direction of a welding traveling trolley, and the imitation position here means the movement amount in the improvement width direction of the welding traveling trolley 20.

In addition, at the time of writing to the recording unit 216, the writing unit 215 writes at least the travel distance and the measured values of the welding current and the welding voltage in association with each other, and writes the driving distance and the imitation position in association with each other. That is, the writing unit 215 writes the measured values of the welding current and the welding voltage for each travel distance and the imitation position for each travel distance to the recording unit 216.

The recording unit 216 records the various values in the welding control means 21. In the recording unit 216, at least the measured values of the traveling distance and the welding current and the welding voltage are written in association with the writing unit 215, and the traveling distance and the imitation position are written in association with each other. That is, the recording unit 216 records the measured values of the welding current and the welding voltage for each travel distance, and the imitation position for each travel distance.

Specifically, the recording unit 216 is implemented with a memory, a hard disk, or the like capable of storing data. As shown in FIG. 2, the recording unit 216 is configured to record various values input from the writing unit 215 and to output them to the PC 50 as necessary. In addition, although the recording part 216 is provided in the welding control means 21 as shown in FIG. 2, you may provide it in the exterior of the said welding control means 21. As shown in FIG.

As shown in FIG. 2, the recording unit 216 includes, from the writing unit 215, a sensor signal, an operation flag signal, a travel distance of the welding travel truck 20, a mimic position of the welding travel truck 20, and the like. The measurement values of the welding current and the welding voltage, and the wire feeding speed are input. The recording unit 216 is inputted from the writing unit 215 in association with at least the measured values of the traveling distance, the welding current and the welding voltage, and the driving distance and the imitation position in association with each other. Then, the recording unit 216 outputs these to the PC 50 as necessary, as shown in FIG. Hereinafter, the other structure of the welding traveling trolley 20 is demonstrated.

The traveling drive means 22 drives the welding traveling truck 20 along the traveling rail 10 in the improved longitudinal direction. Specifically, the driving drive means 22 includes a motor (not shown) driven in the improved longitudinal direction, and an encoder (not shown) that detects the driving amount of the motor, that is, the traveling distance of the welding traveling truck 20. It is. In addition, the travel drive means 22 drives the welding travel truck 20 in the improved longitudinal direction by the motor described above in accordance with the travel drive instruction input from the drive instructing unit 212. The travel distance of the welding travel truck 20 is detected for every predetermined sampling period.

As shown in FIG. 2, a travel drive instruction is input to the travel drive means 22 from the drive instruction unit 212. In addition, the travel drive means 22 outputs the travel distance of the welding travel truck 20 which the encoder which is not shown in figure detected to the drive instruction | command part 212 as shown in FIG.

The imitation drive means 23 drives the welding running truck 20 (welding torch 25) in the improvement width direction. Specifically, the imitation driving means 23 is constituted by a motor (not shown) driven in the improvement width direction and an encoder (not shown) that detects the driving amount of the motor, that is, the imitation position of the welding traveling truck 20. It is. In addition, the imitation drive means 23 drives the welding traveling truck 20 in the improvement width direction by the above-mentioned motor in accordance with the imitation drive instruction input from the drive instruction | indication part 212, and by the said encoder The imitation position of the welding traveling truck 20 is detected for every predetermined sampling period. In addition, the imitation drive means 23 starts the imitation operation of the welding traveling truck 20 in accordance with the operation flag ON signal input from the drive instruction unit 212, and also operates the operation flag input from the drive instruction unit 212. In accordance with the OFF signal, the mimic operation of the welding travel truck 20 is finished.

As shown in FIG. 2, the copy driving means 23 receives a copy driving instruction and an operation flag signal (an operation flag ON signal and an operation flag OFF signal) from the drive instruction unit 212. In addition, the imitation drive means 23 outputs the imitation position of the welding traveling truck 20 which the encoder which is not shown in figure detects to the drive instruction part 212 as shown in FIG.

The wire supply device 24 is a device for supplying the wire W to the welding torch 25. The wire supply apparatus 24 is supported by the trolley | bogie main body 20a here as shown in FIG. In addition, the wire supply device 24 detects the wire supply speed at a predetermined sampling interval (for example, 50 msec to 100 msec), and outputs it to the writing unit 215 as shown in FIG. 2.

The welding torch 25 is for supplying the wire W to the member 1 to be welded. As shown in FIG. 1, the welding torch 25 is supported at the tip of the trolley | bogie main body 20a of the welding traveling trolley | bogie 20, and the wire W with respect to the improvement V which faced the some to-be-welded member 1 was carried out. To supply. In addition, although only one welding torch 25 was shown in the trolley | bogie main body 20a of the welding travel trolley | bogie 20 in FIG. 1, you may be provided with the welding torch 25 in the said trolley | bogie main body 20a.

The sensor 26 is for detecting the improvement position and the termination of the improvement V. Specifically, the sensor 26 is comprised of a detector, a CCD camera, a detection probe, etc. using a laser beam, and moves in the improvement V in advance of the welding torch 25 at the time of welding, as shown in FIG. In addition, while detecting the improvement position, the termination of the improvement V is detected to generate a termination signal. As illustrated in FIG. 2, the sensor 26 outputs the improvement position to the correction amount calculator 211 and outputs the termination signal to the signal generator 213. In addition, although the sensor 26 was introduce | transduced here as being able to detect both the improvement position and the termination of the improvement V, For example, the improvement position detection sensor which detects an improvement position, and the termination of the improvement V (welded improvement direction) It is good also as a structure provided with the termination detection sensor which detects the termination of the member 1 separately.

The welding power supply 27 supplies electric power to the wire W and the to-be-welded member 1, and generate | occur | produces an arc between them. The welding power supply 27 is provided with the welding current detection part and welding voltage detection part which are not shown inside, and detects the welding current and welding voltage at the time of welding at predetermined sampling intervals (for example, 50 msec-100 msec).

As shown in FIG. 2, the welding power source 27 receives an instruction to increase or decrease the welding current or an instruction to increase or decrease the welding voltage from the current voltage control unit 214. In addition, the welding power supply 27 detects a welding current and a welding voltage as mentioned above, and outputs them to the current voltage control part 214.

The back support device 30 is arranged on the rear side of the improvement V of the member 1 to be welded, and is a device for pushing the flux into the rear side of the improvement V. The back support device 30 includes a back support part 31 for pushing the flux from the rear side of the improvement v, elevating means 32 for lifting the back support part 31 in the thickness direction of the member to be welded 1, and While the member 1 to be welded is placed, the panel moving roller 33, the auxiliary rollers 34 and 34, and the member 1 to be moved to move the member 1 in the improved width direction are provided. A magnet mechanism 35 for attracting and fixing and a girder member 36 serving as a base material for supporting these members are provided. Furthermore, the girders 36 are provided with wheels 37 and 37 engaged with the moving rails 60 extending in parallel in the longitudinal direction of the member 1 to be welded.

The single-sided welding device 100 having the above-described configuration includes data of a welding situation including a measurement value of a welding current, a welding voltage, and the like, and data of a device situation including a traveling distance, a copying position, and the like of the welding travel truck 20. Can be recorded at the same time, so that even if a welding failure is found after performing submerged arc welding, it is possible to easily track and analyze the cause of the welding failure.

Hereinafter, the operation of the one-side welding apparatus 100 according to the embodiment will be described with reference to FIGS. 1 and 2. First, the to-be-welded member 1 is mounted on the back support apparatus 30, and the to-be-welded member 1 is moved laterally by the panel movement roller 33 and the auxiliary rollers 34 and 34, and it improves. Position adjustment is performed so that the back support part 31 is located just under the back surface of V. FIG. And when the position adjustment is completed, the to-be-welded member 1 is attracted and fixed by the magnet mechanism 35. As shown in FIG.

Next, the imitation drive means 23 performs the position adjustment so that the welding torch 25 and the sensor 26 are located just above the improvement V. After the position adjustment is completed, the welding control means 21 drives the welding travel trolley 20 along the travel rails 10 and welds the moving travel trolley 20 in the improved longitudinal direction. Is carried out.

At that time, the welding control means 21 includes data of welding conditions (measured values of welding current and welding voltage, wire feeding speed), device conditions (travel distance, imitation position, operation flag ON signal, operation flag OFF signal, The sensor ON signal and the sensor OFF signal) are simultaneously detected or generated, and the writing unit 215 writes them in association. Therefore, even in the case where welding failure is found after welding, for example, the cause can be easily traced and analyzed.

In addition, in the above-described embodiment, the improvement V is parallel in the longitudinal direction of the travel rail 10 in a straight line from the perspective of the plane, and the imitation driving means 23 drives the welding travel cart 20 in the improvement width direction. I am doing it. However, as a modification of the one-side welding apparatus 100 according to the embodiment, the welding traveling trolley 20 may be configured to drive the improvement height direction (hereinafter referred to as the improvement height direction).

In this case, in the correction amount calculation unit 211, the correction amount for moving the welding travel balance 20 in the improvement height direction in addition to the correction amount (horizontal correction amount) for moving the welding travel balance 20 in the improvement width direction. (Portrait correction amount) is calculated, and the drive instruction | indication part 212 produces | generates the lateral imitation drive instruction of a horizontal direction, and the imitation drive instruction of a height direction, respectively, and outputs them to the imitation drive means 23. FIG. And the imitation drive means 23 drives the welding run truck 20 to the improvement width direction and the improvement height direction according to these imitation drive instructions, and the encoder which is not shown with respect to the drive instruction | indication part 212 is The imitation position (horizontal imitation position) in the improvement width direction of the detected welding traveling trolley | bogie 20, and the imitation position (vertical imitation position) in the improvement height direction are output.

In addition, although the single side welding apparatus 100 was demonstrated as a specific example of the submerged arc welding apparatus in the said embodiment, the structure other than the back support apparatus 30 in the said single side welding apparatus 100 is B0X. It is also possible to apply to the corner welding apparatus of a column. That is, the welding control means 21, the traveling drive means 22, the imitation drive means 23, the wire supply means 24, the welding torch 25, the sensor 26, and the like of the single-sided welding device 100 described above. The welding power source 27 is applied to a corner welding device in the form of a box column, and simultaneously associates data of the welding situation consisting of measured values of the welding current and the welding voltage with the data of the device situation consisting of a traveling distance or a copying position. You can also write. Here, the corner welding apparatus of the BOX pillar type | mold performs fillet welding of the corner part of the to-be-welded member 1 in manufacturing processes, such as a BOX pillar.

(Example)

Hereinafter, with reference to FIGS. 3-6, about the experiment example which confirms the effect which the single side welding apparatus which concerns on embodiment of this invention, and the corner welding apparatus of the BOX column form provided with the structure similar to the said single side welding apparatus is obtained. Explain. In addition, "the corner welding apparatus of the BOX column type provided with the structure of a one-side welding apparatus and the like" has the structure other than the back support apparatus in a single-side welding apparatus as mentioned above, and the corner welding apparatus of a BOX column type. Means to apply to.

[First Experimental Example]

In the first experimental example, the metal plate was welded by automatic operation as the member to be welded using the one-side welding device according to the modification of the present invention. Then, in the situation T in which the rear bead disappeared near the traveling distance of 17 m, the cause was tracked and analyzed. In the present experimental example, in the swarm of welding, the measured values of the welding current and the welding voltage as the welding situation are set as the device situation, and the travel distance of the welding travel truck and the imitation position of the welding travel truck (horizontal copying position and vertical copying position). And the wire feeding speed were recorded in the recording section of the welding control means. In addition, the recording section records the travel distance of the welding travel cart and the welding situation data recorded in association with the measured values of the welding current and the welding voltage, and records the travel distance of the welding travel cart and the imitation position of the welding travel cart (horizontal imitation position). And the vertical imitation position) and the wire feeding speed were recorded as device status data.

Next, the PC was connected to the recording unit of the welding control means, and the above welding state data was obtained and graphed as shown in Fig. 3A. In Fig. 3 (a), the horizontal axis represents the traveling distance [mm] of the welding travel truck, and the vertical axis represents the welding current [A] and the welding voltage [V]. Similarly, the apparatus state data described above was obtained and graphed as shown in Fig. 3B. In FIG.3 (b), the horizontal axis | shaft is the travel distance [mm] of a welding travel truck, and the vertical axis | shaft is the mimic position [mm] and wire supply speed [rpm] of a welding travel truck.

As shown in Fig. 3 (a), it can be seen that the waveform in the predetermined section is largely disturbed as compared with Fig. 4 (a) which is a stable waveform at normal time. That is, in FIG. 3A, the welding current increases near the running distance of 17000 mm to 17100 mm, the welding voltage decreases, a short circuit occurs, and the subsequent current decreases.

In addition, when FIG. 3 (b) is confirmed, it turns out that the waveform in a predetermined | prescribed area | region is largely disturbed compared with FIG. 4 (b) which is a stable waveform at the time of normality. That is, in FIG.3 (b), the wire supply speed | rate is increasing in the range of 17000 mm-17100 mm.

Therefore, in view of these points, the welding failure in the first experimental example almost coincides with the position of the welding failure of the work and the position of the traveling distance where the short circuit occurs, and the current is shortened after the short circuit occurs at that position. Since it fell, it can be estimated that it occurred.

[Example 2 Experiment]

In the second experimental example, the corner of the BOX pillar type is automatically operated by using the corner welding device of the BOX column type having the same configuration as the one-side welding device according to the embodiment of the present invention (except for the back support device). Welding was performed, and the cause was traced and analyzed under the situation where the separation of beads occurred at the end portion. In the present experimental example, the measured values of the welding current and the welding voltage as the welding situation, the traveling distance of the welding travel truck, the imitation position of the welding travel truck, the sensor ON signal, the sensor OFF signal, The operation flag ON signal and the operation flag OFF signal were recorded in the recording section of the welding control means. In addition, in the recording section, the travel distance of the welding travel truck and the measured values of the welding current and the welding voltage are recorded as welding status data, and the travel distance of the welding travel truck, the sensor ON signal, the sensor OFF signal, and the operation flag are recorded. The ON signal and the operation flag OFF signal were related and recorded as device status data.

Next, the PC was connected to the recording section of the welding control means, and the above welding state data was obtained and graphed as shown in Fig. 5A. In Fig. 5A, the horizontal axis represents the traveling distance [mm] of the welding travel truck, and the vertical axis represents the welding current [A] and the welding voltage [V]. Similarly, the apparatus state data described above was obtained and graphed as shown in Fig. 5B. In FIG.5 (b), a horizontal axis is the travel distance [mm] of a welding travel truck, and a vertical axis is the mimic position [mm] of a welding travel truck.

In addition, in FIG.5 (b), ON / OFF of a sensor and ON / OFF of an operation flag are shown using the 1 and 0 scale of the vertical axis | shaft. That is, in the case of the scale of 1 of the vertical axis, the sensor ON signal is input and the sensor is ON, or the operation flag ON signal is input and the operation flag is ON. In the case of the zero scale of the vertical axis, the sensor OFF signal is input and the sensor is OFF, or the operation flag OFF signal is input and the operation flag is OFF.

Referring to the welding state data shown in FIG. 5 (a), it can be confirmed that even in comparison with FIG. 6 (a) which is a stable waveform at normal time, there is no significant change in both the welding current and the welding voltage. Next, referring to the device state data shown in FIG. 5 (b), it is confirmed that the imitation position continues to move toward the minus side from the start of welding to the end of welding, as compared with FIG. 6 (b) which is a stable waveform at normal time. Can be. Moreover, it turns out that an operation flag turns OFF and the imitation operation | movement of a welding running truck stops.

Therefore, in view of such a point, it can be inferred that the welding defect in a 2nd experiment example is a cause by which the welding seam shifted from improvement after the imitation operation was stopped because work is set obliquely.

As mentioned above, although the submerged arc welding apparatus, the single-sided welding apparatus, and the corner welding apparatus of the BOX column form which concerns on this invention were demonstrated concretely by the form and the Example for implementing invention, the meaning of this invention is their description. It is not limited to this, but must be interpreted broadly in accordance with the description of the claims. It goes without saying that various changes, modifications, etc. are included in the gist of the present invention according to these descriptions.

For example, the single-sided welding device 100 includes the above-described measurement values of the welding current and the welding voltage, the travel distance of the welding travel truck 20, the imitation position of the welding travel truck 20, the operation flag ON signal, the operation flag OFF signal, In addition to the sensor ON signal, the sensor OFF signal, and the wire feeding speed, the setting values of the welding current and the welding voltage, inputs of various sensors, and operation flags can be recorded in the recording unit 216. For example, the shape of improvement can also be recorded in the recording part 216 by adding the apparatus which detects the shape of improvement. Therefore, tracking and analysis of the cause of a welding defect can be performed from various viewpoints.

1: welded member
10: running rail
20: welding running bogie
20a: bogie body
20b: head frame
21: welding control means
22: driving drive means
23: imitation driving means
24: wire feeder
25: welding torch
26: Sensor
27: welding power
30: back support device
31: back support
32: lifting means
33: panel moving roller
34: auxiliary roller
35: magnetic mechanism
36: girder member
37: wheel
4O: Setpoint input means
50: PC
60: moving rail
100: one side welding device
211: correction amount calculation unit
212 drive indicator
213: signal generator
214: current voltage control unit
215: entry section
216: register
V: Improvement
W: Wire

Claims (2)

A submerged arc welding device for welding a groove back to a member to be welded,
A welding torch for supplying a wire to the improvement,
A welding traveling bogie supporting the welding torch,
A traveling rail for supporting the welding traveling truck to be capable of traveling;
A welding power supply for supplying electric power to the welding torch and the member to be welded, and detecting a welding current and a welding voltage;
A sensor which is supported by the welding traveling truck and detects an improved position prior to the welding torch,
Welding control means for controlling movement of the welding travel truck;
Traveling drive means for driving the welding travel truck in the improved longitudinal direction according to an instruction of the welding control means, and detecting a travel distance indicating a movement amount in the improved longitudinal direction of the welding travel truck;
In accordance with the instruction of the welding control means, the welding travel truck is driven in an improvement width direction that is a direction orthogonal to the improvement longitudinal direction, and a copying position indicating a movement amount in the improvement width direction of the welding travel truck is detected. It has a imitation drive means to
The welding control means,
Instructing the traveling drive means to drive the welding travel truck in the improved longitudinal direction, and in accordance with the improved position detected by the sensor, in the improved width direction of the welding travel truck with respect to the mimic driving means. A driving instruction unit for instructing driving of the vehicle;
The travel distance detected by the travel drive means relates to the measured values of the welding current and the welding voltage detected by the welding power source, and the travel distance detected by the travel drive means and the imitation drive means are detected. Registry to write one copy position in association
Submerged arc welding apparatus comprising a.
A one-side welding device for welding an improvement back to a member to be welded from one side,
A welding torch for supplying a wire to the improvement,
A welding traveling bogie supporting the welding torch,
A traveling rail for supporting the welding traveling truck to be capable of traveling;
A welding power supply for supplying electric power to the welding torch and the member to be welded, and detecting a welding current and a welding voltage;
A sensor which is supported by the welding traveling truck and detects an improved position prior to the welding torch,
Welding control means for controlling movement of the welding travel truck;
Traveling drive means for driving the welding travel truck in the improved longitudinal direction according to an instruction of the welding control means, and detecting a travel distance indicating a movement amount in the improved longitudinal direction of the welding travel truck;
In accordance with the instruction of the welding control means, the welding travel truck is driven in an improvement width direction that is a direction orthogonal to the improvement longitudinal direction, and a copying position indicating a movement amount in the improvement width direction of the welding travel truck is detected. Imitation driving means,
Having a backing device installed on the opposite side of the refinement,
The welding control means,
Instructing the traveling drive means to drive the welding travel truck in the improved longitudinal direction, and in accordance with the improved position detected by the sensor, in the improved width direction of the welding travel truck with respect to the mimic driving means. A driving instruction unit for instructing driving of the vehicle;
The travel distance detected by the travel drive means relates to the measured values of the welding current and the welding voltage detected by the welding power source, and the travel distance detected by the travel drive means and the imitation drive means are detected. Registry to write one copy position in association
Single sided welding device comprising a.

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