JP2001058275A - Weld control system - Google Patents

Weld control system

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Publication number
JP2001058275A
JP2001058275A JP11231028A JP23102899A JP2001058275A JP 2001058275 A JP2001058275 A JP 2001058275A JP 11231028 A JP11231028 A JP 11231028A JP 23102899 A JP23102899 A JP 23102899A JP 2001058275 A JP2001058275 A JP 2001058275A
Authority
JP
Japan
Prior art keywords
welding
control device
device
data
welding control
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP11231028A
Other languages
Japanese (ja)
Inventor
Shingo Kawai
Satoru Kawamatsu
悟 川松
真吾 河合
Original Assignee
Nadex Co Ltd
株式会社ナ・デックス
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nadex Co Ltd, 株式会社ナ・デックス filed Critical Nadex Co Ltd
Priority to JP11231028A priority Critical patent/JP2001058275A/en
Priority claimed from US09/632,364 external-priority patent/US6609033B1/en
Publication of JP2001058275A publication Critical patent/JP2001058275A/en
Pending legal-status Critical Current

Links

Abstract

(57) [Problem] To solve the problem of a conventional welding control system in which a dedicated teaching device must be prepared for each welding control device to teach welding sequence data, and the operation is cumbersome. SOLUTION: A higher-level control device 2 sends a field bus 50.
Then, the address data and the welding sequence data in the welding control device 22 are output. Teaching is performed by storing the welding sequence data output from the host controller 2 at the designated address in the storage device 28, and the teaching device 4 for the host controller 2 can teach to the welding control device 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to an improvement in a welding control system. In particular, while the system is inexpensive,
The present invention relates to a technique for improving operability in operating it.

[0002]

2. Description of the Related Art A welding device is often used together with a robot, a work transfer device, a work positioning jig, and the like to automate a welding process. In this case, for example, the operation of the robot and the control of the welding device need to proceed while maintaining the timing (with synchronization). Usually, the operation of the robot, the work transfer device, the work positioning jig, and the like is performed until a predetermined operation. When it is time to proceed to enable welding, the control device of the above-mentioned various devices sends a welding start signal to the welding control device to start welding control by the welding control device. Hereinafter, a device that sends a welding start signal to the welding control device is referred to as a host control device.

[0003] Optimum values of welding current, such as the magnitude of the welding current, the time change of the magnitude, the energizing time, and the clamping pressure between a pair of welding guns, are optimal depending on the material, thickness, surface treatment, welding position, etc. of the workpiece. Change. Therefore, a plurality of types of welding sequence data are stored in the welding control device in accordance with the type of welding, and one set of welding sequence data corresponding to the type of welding is called to control the welding.

As shown in FIG. 1, a conventional welding control system mainly includes a host controller 102 and a welding controller 1.
22 and a cable group 100 connecting them. The host control device 102 controls the robot, the work transfer device, the work positioning jig, and the like, and also controls the start of welding control and the type of welding to be performed at that time. The host control device 102 includes a CPU 106, a storage device 108, and an input / output I / O 110. In the host controller 102,
A teaching device 104 for a higher-level control device is connected, and programs and data necessary for controlling a robot, a work transfer device, a work positioning jig, and the like, and a timing at which the welding control device 122 starts welding control. Is transmitted from the teaching device 104 for the higher-level control device 102 to the higher-level control device 102, and the taught data and the like are stored in the storage device 108. .

The welding control device 122 includes a welding transformer 13
The welding device is controlled by controlling a valve group 138 and the like for opening and closing the six or one pair of welding guns. The welding control device 122
Is a CPU 126, a storage device 128, a first input / output I /
An O124, a second input / output I / O 130, and a switching element 132 are provided. The switching element 132 is interposed between the welding power source 134 and the welding transformer 136 to turn on and off the welding current intermittently and control the effective welding current.

The welding control device 122 includes a welding control device 1
22 is connected to the teaching device 105,
The welding sequence data necessary for welding control is sent from the teaching device 105 to the welding control device 122, and the taught welding sequence data is stored in the storage device 128.

In order to obtain a good welding result, the welding conditions such as the magnitude of the welding current, the time change of the magnitude, the energizing time, and the clamping pressure between the pair of welding guns must be adjusted to appropriate values. However, the appropriate value changes for each type of welding. For example, when a thin iron plate is welded, the amount of heat escaping to the surroundings is smaller than when a thick iron plate is welded. Therefore, the welding current is preferably smaller than when a thick iron plate is welded. Alternatively, when welding the corners of the iron plate, the amount of heat escaping to the periphery is smaller than when welding the center, so that the welding current is preferably smaller than when the center is welded. The welding control device 122 is required to perform welding under various welding types such as a thick iron plate, a thin iron plate, welding at a corner, and welding at a central portion under welding conditions suitable for each type. Therefore, the teaching device 105 instructs the welding control device 122 to control welding using this welding sequence data at the time of a certain type of welding and to perform welding using another welding sequence data at the time of another type of welding. Used as The welding sequence data 128 stored in the storage device 128 indicates data necessary for adjusting the welding conditions to the optimum for each welding type.
For example, the welding sequence data 1 includes, for the welding type 1 (for example, welding of a corner of a thin iron plate), the magnitude of the welding current, the time change of the magnitude, the energizing time, the clamping pressure of a pair of welding guns, and the like. This shows the welding conditions.

As described above, the host controller 102 controls the operation of the robot or the like, and when the robot or the like operates and it is time to perform welding, the welding controller 1
It is taught to output a welding start signal to 22.
At this time, the upper-level control device 102 not only outputs a welding start signal but also outputs a signal indicating the welding type so that the welding conditions can be changed depending on the welding type.

[0009] From the host controller 102 to the welding controller 12
2 are provided with output ports corresponding to the number of welding types in the input / output I / O 110 of the host controller 102 so that the welding start signal and the signal indicating the welding type are transmitted to The / O 124 has the same number of input ports, and each port is connected by a cable group 100. For example, when the type 1 welding is started, the first port 1 of the input / output I / O 110 is set to high, and the high signal is output to the first port 1 of the input / output I / O 124 via one cable of the cable group 100. 1 input port 1
And the welding control device 122 is instructed to start welding of welding type 1.

Actually, one output port is provided in the input / output I / O 124 and the input / output port 110 is provided in the input / output port 110 so that the timing at which the welding control device 122 completes the welding control is transmitted to the host control device 102. One input port is prepared, both ports are connected by one cable, and a welding completion signal is transmitted from the welding control device 122 to the host control device 102.

In this welding control system, the input / output I / Os 110 and 124 of the host controller 102 and the welding controller 122 need at least as many input / output ports as the number of welding types. Control device 1
Between 22, at least the number of cables equal to the number of welding types is required. In practice, it is necessary to send a welding completion signal from the welding control device 122 to the host control device 102, and the number of required ports and the number of cables are further increased.

In recent years, there has been a great demand for a production line capable of producing various types of products, the number of types of welding has increased, and the number of required cables has increased, which complicates the wiring work and increases the labor for maintaining and managing the cable group. Let me. In particular, this problem becomes remarkable when a plurality of welding control devices are connected to the host control device. For example, in an automobile assembly line, since a plurality of welding devices are simultaneously operated and welded to one vehicle body, a plurality of welding control devices may be connected to one higher-level control device. Many.

In the welding control system shown in FIG. 2, a plurality of welding control devices (222A, 222A,
.., 222B...) Indicate a system configuration connected by a cable group. Obviously, it is necessary to connect a large number of cable groups to the host controller 202, which complicates the wiring work and increases the maintenance work of the cable groups.

Therefore, in order to reduce the number of cables,
The system of FIG. 3 has been developed. In the system shown in FIG. 1, a number of cable groups was required, which is obtained by adding 1 to the number of welding types (one cable is required for a welding completion signal). In the system shown in FIG. 2, the number of cables equal to the number obtained by integrating the number of welding types for each welding control device and the number of welding control devices is required. In the system shown in FIG. 3, the host control device 302 and the welding control device 32
2A, 322B, 322C and the like are connected by a field bus 350.

The field bus 350 is connected to the host controller 3
02 and the respective welding control devices 322A, 322B, 3
22C and the like are basically connected in series by a single cable, and do not connect the host controller and each welding controller in a one-to-one manner as in the systems of FIGS. In the system shown in FIG. 3, a signal indicating the welding type and the start of welding is sent to the welding control devices 322A, 322B, 322C and the like via the field bus 350. At this time, in order to clarify which welding control device is sending the signal, a unique address is assigned to each welding control device in advance. Hereinafter, this is called a device address. When it is time to start the welding control, the host controller 302 outputs a signal indicating the welding type to the field bus 350 following the device address for one welding controller that controls the welding. The data of which type of welding control is to be started by which welding control device when the operation of the robot or the like progresses to the upper control device 302.
From the teaching device 304 to the host controller 302
Has been taught in advance.

One welding control device having the device address output to the field bus 350 inputs data indicating the welding type following the device address, and starts welding control based on the welding sequence data corresponding to the type. I do.

The welding sequence data corresponding to the welding type is previously taught using a teaching device. As shown in FIG. 3, in order to teach a plurality of types of welding sequence data to the welding control device A, the welding control device A
A teaching device 305A for the welding control device B is used to teach a plurality of types of welding sequence data to the welding control device B.
5B, and a teaching device 305C for the welding control device C is used to teach the welding control device C a plurality of types of welding sequence data.

The host controller 302 and the welding controller 322
In the system of FIG. 3 in which A, 322B, and 322C are connected by the field bus 350, there is no need to connect the input / output ports of the host controller and the welding controller in a one-to-one relationship, so the number of required cables is greatly reduced. I do. In addition, since this system employs the same teaching system as the conventional teaching system shown in FIGS. 1 and 2, it has an advantage that it is accustomed to workers engaged in teaching the welding control device. Bring.

However, in the system of FIG. 3, in order to teach welding sequence data to each welding control device,
A teaching device is required for each welding control device, and must be taught from each teaching device. This still increases the construction cost of the system and complicates the operation required for operation.

[0020]

The system using the field bus shown in FIG. 3 can reduce the number of cables connecting the host controller and the welding controller. However, in order to teach the welding sequence data to the welding control device, the welding control device must be taught using a dedicated teaching device, and the operation of operating the system is troublesome. Absent.

The present invention is to solve the above-mentioned problem of the conventional welding control system, and outputs address data and welding sequence data in the welding control device from a higher-level control device to a field bus. By that
It is an object of the present invention to enable a higher-level control device to teach a welding control device, thereby realizing a technology for improving operation operability.

[0022]

In order to solve the above problems, a welding control system whose concept is schematically shown in FIG. 4 has been developed.

In the welding control system according to the first aspect,
The upper controller 402 and the welding controller 422A are connected by a field bus 450, the welding controller 422A stores a plurality of types of welding sequence data, and a signal indicating the welding type and the start of welding to the field bus 450 from the upper controller 402. Is output when the welding control device 422 is output.
A is a welding control system in which welding is controlled based on welding sequence data corresponding to the welding type by A. Address data and welding sequence data in the welding control device are output from the upper control device 402 to the field bus 450. It is characterized by.

According to this welding control system, the upper control device 402 and the welding control device 422A
Since they are connected at 50, the number of cables is small. A plurality of types of welding sequence data such as welding sequence data 1, welding sequence data 2,... Are stored in the storage device of the welding control device 422A.
When a signal indicating the welding type and the start of welding is output from the host control device 402 to the field bus 450, the welding control device 422A controls the welding based on the welding sequence data corresponding to the welding type. This operation is similar to that of the conventional system shown in FIG.

In the case of this system, the host controller 402
Outputs the address data and the welding sequence data in the welding control device 422A to the field bus 450. Then, the welding control device 422A stores the welding sequence data output to the feel path 450 at an address in the designated device. Thus, the welding control device 4
The welding sequence data is taught at 22A.
For this reason, teaching can be performed on the welding control device 422A from the upper control device 402, and there is no need to prepare a unique teaching device for the welding control device 422A.
There is no need to go to 2A and perform the teaching operation.

In the welding control system according to the second aspect,
The welding control system according to claim 1, further comprising:
Monitor data during welding is stored in the welding control device 422A, and the monitor data is output from the welding control device 422A to the field bus 450.

According to this welding control system, monitor data detected during welding is stored in the storage device of the welding control device 422A, and the monitor data is output from the welding control device 422A to the field bus. As a result, monitor data during welding is transmitted to the host controller 402 and stored.

Further, in the welding control system according to the third aspect, the host controller 402 and the plurality of welding controllers 422
Are connected by a field bus 450, a plurality of types of welding sequence data are stored in each of the welding control devices 422A, 422B..., And one of the welding control devices (for example, 42
2A), a signal indicating the welding type and the start of welding are output, and one of the welding control devices (422 in this case) is output.
In the welding control system in which the welding is controlled based on the welding sequence data corresponding to the welding type according to A), the host controller 402 sends the address data (422A,
422B ...), address data in the welding control device and welding sequence data are output.

According to this welding control system, the welding sequence data can be taught from the upper control device 402 to an arbitrary welding control device, and an arbitrary type of welding control is executed by using any one welding control device. Operability of the system operation can be greatly improved.

[0030] In the welding control system according to the fourth aspect,
The upper control device 402 and the welding control device 422A are connected by a field bus 450, and a teaching device 404 is prepared in the higher control device 402, and the teaching device 404 can teach to the welding control device 422A via the field bus 450. And

According to this welding control system, the upper control device 402 and the welding control device 422A are connected to the field bus 4
Since the teaching device 404 is prepared in the host control device 402, the teaching device 404 is connected to the host control device 402 and the field bus 450.
Can be taught to the welding control device 422A via the. This eliminates the need to perform a teaching operation on the welding control device 422A separately from a teaching operation on the host control device 402. Further, it is not necessary to install a teaching device dedicated to the welding control device.

[0032]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 5 shows an overall configuration of an example of a welding control system using the present invention. This welding control system is mainly composed of a host control device 2, a welding control device 22, and a field bus 50. In this embodiment, a plurality of welding control devices are connected to the field bus 50. However, in FIG. 5, the first welding control device 22 and the second and third welding control devices 22B and 22B are connected.
Only 22C is displayed, and the fourth and subsequent welding control devices are not shown. Welding control device 22, 22B, 22C
... have a common configuration, so that the welding control device 22 will be described in common below.

In this case, the host control device 2 controls the transfer device of the automobile body, controls the start timing of the welding control and the type of welding to be performed at that time, and controls the welding control device 22.
Is a device that teaches welding sequence data to each other and achieves each function of centrally storing monitor data.
A storage device 8 and an input / output I / O 10 are provided.

The welding control device 22 is a device for performing welding control according to welding conditions. And the welding control device 22
Is a CPU 26, a storage device 28, a first input / output I / O2
4, a second input / output I / O 30, and a switching element 32. The switching element 32 is located between the welding power source 34 and the welding transformer 36, and controls the effective welding current by intermittently turning on and off the power supply to the welding transformer 36 under the control of the CPU 26. Second input / output I
/ O30 controls the switching element 32,
It is connected to a valve group 38 arranged in a pneumatic circuit that opens and closes a pair of welding guns. By controlling the valve group 38, opening and closing and clamping pressure of the pair of welding guns are controlled. The sensor group 40 includes a detector of the welding current actually supplied, a detector of the actual clamping pressure, a measuring device of the actual conduction time, and the like, and monitors the welding current, the clamping pressure, the conduction time, etc. during the welding control. Find the data. The monitor data detected by the sensor group 40 is stored in the storage device 2 via the input / output I / O 30.
8 are sequentially stored at specific addresses prepared in advance.

The host controller 2 and the welding controller 22 are connected by a field bus 50. A plurality of welding control devices 22 are connected in series by a field bus 50. A device address is assigned to the host controller 2 and each welding control device 22 in advance, and by outputting device address data to the field bus 50, the host controller 2 or the welding device that inputs the data output to the field bus 50. One of the welding control devices 22 in the control device group can be designated.

A teaching device 4 is connected to the host control device 2. The teaching device 4 controls data necessary for controlling the transfer device of the vehicle body and, when the transfer device is operated to any extent, any welding control. Data of what type of welding is to be performed using the device can be taught to the upper control device 2, and welding sequence data of any type can be taught to any welding control device. In the latter case, the welding sequence data and the like input from the teaching device 4 are temporarily stored in the storage device 8 of the host control device 2 and then output to the field bus 50.

When teaching the welding sequence data from the host controller 2 to the welding controller 22, the field bus 5
The data sent to 0 is shown in FIG. In FIG.
A head 601 indicates the start of a set of data. Following the communication control information, the header 601 includes n indicating the device address of the higher-level control device 2 that is the data transmission source.
A bit upper control device address signal 601A is included. Also, an n-bit destination device address signal 60 indicating the teaching target welding control device 22 that is the data destination.
3A is included. N is set to the destination address signal 603A.
Since the bits are prepared, 2 n −1 welding control devices 22 can be connected (1 is reduced because one device address is assigned to the upper control device 2). A message is output following the header 601, and the message includes an m-bit welding start signal 602. Since the welding start signal is sent in m bits, 2 m -1 welding types can be designated for each welding control device (a signal in which all bits are zero is decremented by 1 because it is not a welding start signal). Then, p-bit internal address data 603B
Is output. To specify the device address in p bits, each welding control apparatus, 2 p pieces of address is assigned to the storage area of the welding sequence data. Subsequently, the welding sequence data 604 is output in q bits. The welding sequence data 604 is data indicating welding current, its time change pattern, energizing time, clamping pressure of a pair of welding guns, and the like, and is expressed by q bits. Next, a data write signal 605 is output. If this signal is high, welding sequence data is taught to the welding control device 22. Next, a data reading signal 606 is output. If the signal is high, monitor data or other data stored in the welding control device is output to the field bus 50.
When the normal welding control is executed, the data write signal 60
Neither 5 nor the data read signal 606 is high. Finally, the trailer 607 is output to indicate that a set of data has been completed.

First, the situation when the welding sequence data is taught from the upper control device 2 to the welding control device 22 will be described. At this time, the worker engaged in the teaching operation first uses the teaching device 4 to input which welding control device is to be taught which type of welding sequence data, and then inputs the welding control device. Of the welding sequence data of that type. The input data is stored in the storage device 8 once.
And then a teaching signal is output to the field bus 50.

At the time of teaching, the data shown in FIG. 6 is output from the host controller 2 to the field bus 50. here,
High is output to the data write signal 605.

When this signal is sent to the field bus 50, since the data write signal 605 is high, the p-bit in-device address signal 603 of the welding control device designated by the n-bit device address signal 603A is output.
At the address designated by B, q-bit welding sequence data 604 is stored, and it is stored that the welding sequence data is welding sequence data for the type indicated by data 602 indicating the m-bit welding type. . Thus, the teaching processing of the welding sequence data from the teaching device 4 for the higher-level control device 2 to the welding control device 22 via the higher-level control device 2 and the field bus 50 is completed. Obviously, it is understood that any welding control device can be taught welding sequence data of any welding type.

Next, a description will be given of a state where the host controller 2 advances the transfer device of the automobile body to a predetermined state and starts welding. At this time, since data indicating which type of welding is to be started by which welding control device is instructed to the upper control device 2, the m-bit welding start signal 602 indicating the welding type and the An n-bit device address signal 603A indicating one welding control device for executing the type of welding control is output. At this time,
The data write signal 605 is also the data read signal 606
Is not set to high, and the welding control device designated by the device address signal 603A does not teach the welding sequence data, does not request the output of monitor data, and outputs the welding start signal 6
It recognizes that the start of welding of the type designated by 02 has been instructed, reads the welding sequence data for the welding type from the storage device 28, and starts welding control. As a result, the switching element 32 is controlled based on the read welding sequence data, and adjusts the welding current to an optimal welding current for the designated welding type. The valve group 38 is also controlled based on the read welding sequence data,
Adjust to the optimum clamping pressure. Further, the switching element 3
Reference numeral 2 denotes an OFF state after the end of the read energization time, and the energization ends. In this way, welding is performed according to the welding conditions based on the read welding sequence data.

The welding control device 22 stores a program for monitoring actual welding conditions during welding and storing the monitoring result at a specific address in the storage device 28. For example, as for the energizing current, the average welding current during the welding operation is detected by the sensor and stored at a specific address in the storage device 28. This specific address is programmed in advance as a storage location of the monitor data of the average welding current detected by the sensor. The actual clamping pressure of the pair of welding guns is detected by a sensor and stored at another specific address in the storage device 28. This specific address is also allocated in advance as a storage area for monitor data of the clamping pressure detected by the sensor.

At the end of welding, the welding control device 22 is programmed to output a set of data shown in FIG. In FIG. 7, a header 701 indicates the start of data. In the header 701,
Following the communication control information, a device address signal 703 indicating an n-bit transmission source assigned to the welding control device that transmits data is included. In this case, as the data indicating the data transmission destination, in this case, an n-bit signal 70 indicating the device address assigned to the higher-level control device 2
8 is also included. A message is output following the header 701. The message includes a welding completion signal 702. Subsequently, r-bit monitor data 7
04 is included. Finally, a trailer 707 is output to indicate the end of the data.

By outputting the data shown in FIG. 7 to the feed path 50, the upper control device 2 determines which welding control device has completed the welding operation (the source device address signal 703).
), Monitor data during welding at that time (r
Then, the monitor data output from the field bus 50 is stored in the storage device 8.

When the welding completion signal is input, the host controller 4 controls the transfer device of the automobile body for the next operation. As a result, the welding control and the transport control of the vehicle body are executed in synchronization.

The welding control unit 22 is programmed to output the data of FIG. 7 to the field bus 50 when welding is completed, and the data of FIG. Even when the data read signal 606 is high, it is programmed to output the data shown in FIG. That is, the host control device 2 can take out monitor data from the welding control device 22 when necessary. In this case, the host controller 2 transmits the destination device address signal 603 shown in FIG.
A and the address signal 603B in the device are output to specify the storage location of the required monitor data, and the data read signal 606 is set to high to request the welding control device to output the monitor data. Note that this method is not limited to a monitor data output request, and can specify an arbitrary address in the device. Therefore, by specifying the in-apparatus address where the welding sequence data is stored, the host control device 2 can read out the welding sequence data stored in the welding control device 22.

In the welding control system according to this embodiment, a plurality of welding control devices are connected to a higher-level control device via a field bus. The monitor data from the plurality of welding control devices are centrally stored in the storage device 8 of one higher-level control device 2 shown in FIG. 3, so that the operator can easily confirm the welding status of the plurality of welding control devices. It will be easier. In addition, since the welding conditions can be taught from the teaching device 4 of the host control device 2 to each welding control device, the welding conditions can be re-taught for each welding control device in consideration of the monitor data. Therefore, operability is good.

As described above, in the welding control system according to this embodiment, the upper control device 2 and the welding control device 22 are connected by the field bus 50,
Stores a plurality of types of welding sequence data. When a signal (indicated by an m-bit welding start signal 602) indicating a welding type and a welding start is output from the host controller 2 to the field bus 50, the welding is performed. A welding control system in which welding is controlled by the control device 22 based on welding sequence data corresponding to the welding type,
The address data 603B and the welding sequence data 6 in the welding control device
Since 04 is output, welding sequence data can be taught from the teaching device 4 for the higher-level control device 2 to the welding control device 22, and there is no need to prepare a teaching device for each welding control device. In addition, there is no need for the teaching operator to go to the location where the welding control device is present for teaching.

Further, the monitor data during welding is stored in the welding control device 22 and the monitor data is output from the welding control device 22 to the field bus 50. Activity monitoring data is centrally managed. In particular, in this embodiment, since the welding control device is programmed to output the monitor data to the field bus when the welding is completed, the monitor data is sequentially collected in the host control device. Separately from this, when the device address signal 603A and the device address signal 603B are output from the host controller 2 to the field bus 50, the monitor data stored at the specific address in the device is transmitted to the field bus. It is programmed to output, so that the host controller can take in monitor data when necessary and perform centralized management.

As shown in the embodiment, the present invention is useful when a plurality of welding control devices 22 are connected to the upper control device 2 via the field bus 50, and Address data 603A of the welding control device and address data 603 of the welding control device.
Since B and the welding sequence data 604 are output, welding sequence data of an arbitrary welding type can be taught from the teaching device 4 for the upper control device 2 to an arbitrary welding control device.

As described above, the upper controller 2 and the welding controller 22 are connected by the field bus 50, and the upper controller 2
Is provided with a teaching device 4, and the teaching device 4 is capable of teaching to the welding control device 22 via the field bus 50. Is transmitted, the teaching operation of the welding control device 22 can be completed based on the data, and the operability for operating the system is greatly improved.

[0052]

Since the present invention is configured as described above, the following effects can be obtained.

According to the welding control system of the first aspect, since welding sequence data to be taught to the welding control device and address data for storing the data can be transmitted from the host control device to the welding control device via the field bus, the welding control can be performed. There is no need for a dedicated teaching device.

According to the welding control system of the second aspect, monitor data during welding is stored in the welding control device, and the monitor data is output from the welding control device to the field bus. For this reason, the monitor data output to the field bus can be confirmed by the host controller, and the welding controller can be monitored by the host controller.

According to the welding control system of the third aspect, when a plurality of welding control devices are connected to the higher-level control device, the higher-level control device sends one of the welding control devices to one of the welding control devices via the field bus. Since the welding sequence data to be taught to the welding control device and the address data for storing the data can be transmitted, it is not necessary to prepare a dedicated teaching device for each of the plurality of welding control devices.

According to the welding control system of the fourth aspect, the host controller and the welding controller are connected by a field bus,
A teaching device is prepared for the host controller,
Since teaching can be performed from the teaching device to the welding control device via the field bus, teaching can be performed to the welding control device by the host control device, thereby facilitating the teaching operation. In particular, it is suitable for expanding the scale of a production line or networking.

[Brief description of the drawings]

FIG. 1 shows a schematic diagram of a conventional welding control system using a dedicated cable.

FIG. 2 is a schematic view of a main part of a conventional welding control system in which a plurality of welding control devices are connected using a dedicated cable.

FIG. 3 is a schematic view of a main part of a conventional welding control system in which a plurality of welding control devices are connected using a field bus.

FIG. 4 is a schematic view of a main part of a welding control system according to the present invention in which a plurality of welding control devices are connected using a field bus.

FIG. 5 shows a schematic diagram of a welding control system according to an embodiment.

FIG. 6 shows an example of data output to a field bus during teaching.

FIG. 7 shows an example of data output to a field bus at the end of welding.

[Explanation of symbols]

 2 ··· Upper control device 4 ··· Teaching device 8 ··· Storage device 22 ··· Welding control device 28 ··· Storage device 50 ··· Fieldbus

Claims (4)

    [Claims]
  1. An upper controller and a welding controller are connected by a field bus, a plurality of types of welding sequence data are stored in the welding controller, and a signal indicating a welding type and welding start is transmitted from the upper controller to the field bus. In a welding control system in which welding is controlled based on welding sequence data corresponding to the welding type by the welding control device when output, address data and welding sequence data in the welding control device are transmitted from a higher-level control device to a field bus. Is output.
  2. 2. The welding control system according to claim 1, wherein monitor data during welding is stored in the welding control device, and the monitor data is output from the welding control device to a field bus. Welding control system.
  3. 3. A higher-level controller and a plurality of welding controllers are connected by a field bus. Each welding controller stores a plurality of types of welding sequence data. When a signal indicating the welding type and the start of welding is output, the welding control is performed by the one welding control device based on the welding sequence data corresponding to the welding type. A welding control system wherein address data of a welding control device, address data in the welding control device, and welding sequence data are output.
  4. 4. A higher-level control device and a welding control device are connected by a field bus, and a higher-level control device is provided with a teaching device, and the welding control device is capable of teaching to the welding control device from the teaching device via the field bus. system.
JP11231028A 1999-08-18 1999-08-18 Weld control system Pending JP2001058275A (en)

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JP11231028A JP2001058275A (en) 1999-08-18 1999-08-18 Weld control system
US09/632,364 US6609033B1 (en) 1999-08-03 2000-08-03 Field programmable welding controller
US09/632,377 US6444942B1 (en) 1999-08-03 2000-08-03 Welding control systems

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002321056A (en) * 2001-04-25 2002-11-05 Obara Corp Welding control device
EP1430984A4 (en) * 2001-09-28 2008-06-18 Matsushita Electric Ind Co Ltd Arc welder
WO2014196283A1 (en) * 2013-06-03 2014-12-11 株式会社神戸製鋼所 Welding device, welding system, program used in welding device, and control method for welding device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002321056A (en) * 2001-04-25 2002-11-05 Obara Corp Welding control device
EP1430984A4 (en) * 2001-09-28 2008-06-18 Matsushita Electric Ind Co Ltd Arc welder
WO2014196283A1 (en) * 2013-06-03 2014-12-11 株式会社神戸製鋼所 Welding device, welding system, program used in welding device, and control method for welding device
JP2014233746A (en) * 2013-06-03 2014-12-15 株式会社神戸製鋼所 Welding apparatus, welding system comprising a plurality of welding apparatuses, and program used for welding apparatus
CN105307809A (en) * 2013-06-03 2016-02-03 株式会社神户制钢所 Welding device, welding system, program used in welding device, and control method for welding device

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