JP2716694B2 - Multi-stage arc stud welding equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-stage arc stud welding apparatus that sequentially performs stud welding at a plurality of locations using one power supply device. [Prior Art] Arc stud welding is widely used in various fields because a stud can be instantly and reliably welded by a simple operation. As a device, an AC current from an AC power supply is usually converted to DC through a transformer and a rectifier, and a desired level of welding energy is applied between a stud and a base material through a discharge circuit and a welding gun by a trigger operation of the welding gun. It is designed to flow instantaneously, and is designed so that the level of welding energy can be appropriately adjusted according to the size and material of the stud to be welded. Further, in a conventional arc stud welding apparatus, one welding gun is usually connected to one apparatus and used. [Problems to be Solved by the Invention] By the way, such an arc stud welding apparatus usually uses a welding apparatus fixedly arranged close to the apparatus when it is used, for example, in a production line in a factory. It does not matter much if the weight and bulk of the welding equipment is large, but when used at work sites such as shipbuilding and construction, it is relatively heavy and bulky when the work site is narrow or high. Bringing the welding device to its work site can be difficult and sometimes difficult. Furthermore, in the case of a type in which one welding gun is connected to one unit, it is difficult to carry in a plurality of devices because welding operations are performed at a plurality of places at the same time. Therefore, if it is difficult to bring the welding device itself to the work site, place the welding device itself in a place that can be installed away from the work site, and bring only the welding gun to the work site to perform the welding work. It is common to do. However, in such a case, it is necessary to go from the work site to the place where the welding equipment itself is installed and set the welding conditions again in accordance with the type and dimensions of the stud to be welded. It cannot be done efficiently. On the other hand, a type in which a plurality of welding guns are connected to one welding device and used is also in practical use, but even in this case, only one welding gun can be operated at a time, and furthermore, in continuous operation, It is virtually impossible to operate the welding gun arbitrarily at different welding conditions. When each worker uses his or her own welding gun, it is necessary to coordinate each other's work properly, which means that work efficiency is greatly restricted even at the same work site. In other words, when working in different work sites in different situations, even if they have considerable skill, they cannot perform welding work efficiently. Therefore, an object of the present invention is to solve the above-mentioned drawbacks and problems when performing stud welding sequentially at a plurality of locations using a single power supply device, and an operator who uses each welding gun has working conditions at hand. It is another object of the present invention to provide a multi-stage arc stud welding apparatus capable of arbitrarily setting a welding order. [Means for Solving the Problems] To achieve the above object, according to the present invention, a common power supply device having a current-voltage control circuit for supplying a required level of welding energy is used. In a multi-stage arc stud welding apparatus configured to sequentially perform stud welding at a plurality of locations with a plurality of welding guns, the stud welding is connected to a welding energy supply cable from the common power supply device and operated by a trigger operation of the welding gun. A switching device for extracting welding energy, comprising a discharge thyristor and a control circuit for the same, and a welding current and welding time of a welding gun combined with the control circuit of the discharge thyristor in the switching device for extracting welding energy. Welding condition setting devices for setting welding conditions such as Common power supply device and the control circuit of the discharge thyristor of the switching device for taking out each welding energy,
The present invention is characterized in that one welding order determining device for determining the welding order of each welding gun is provided in common for each welding gun so that the operation order of each welding gun can be displayed. [Operation] In the multi-stage arc stud welding apparatus of the present invention configured as described above, the necessary and sufficient welding conditions for the stud to be welded by the welding condition setting apparatus combined with each welding gun are set in advance. During operation, the welding gun is supplied with welding energy at a set level from a power supply for a set time. Therefore, even if different welding conditions are set by the respective welding condition setting devices, welding energy can be supplied to each welding gun under different welding conditions. In addition, the welding order determination device determines the operation priority of each welding gun in order to prevent welding energy from being supplied to a plurality of welding guns from one power supply device at the same time. The order of operation can be displayed so as to be understood, so that only one welding gun can be operated at a time, and the stud welding due to the simultaneous overlapping operation is prevented from being damaged and unnecessary operation is avoided. Embodiment An embodiment of the present invention will be described below with reference to the accompanying drawings. The drawings schematically show a multi-stage arc stud welding apparatus according to an embodiment of the present invention, wherein 1 is a power supply device, which is provided with a current-voltage control circuit for supplying a required level of welding energy, and is provided with this circuit. As such, it can be configured in the same way as a normal arc stud welding device. A number of switching devices 3A, 3B, 3C,... For extracting welding energy are connected in series to the welding cable 2 from the power supply device 1, and each of the switching devices 3A, 3B, 3C,. , And a control circuit therefor, that is, triggers from the welding guns 4A, 4B, 4C, ... The signal is provided to the gate electrode of the combined discharge thyristor. 5A, 5B, 5C, ..., each welding gun 4A, 4B, 4C, ...
The welding condition setting devices 5A, 5B, 5C,... Are connected to the control circuit of the discharge thyristor in the switching devices 3A, 3B, 3C,. , Each combined welding gun 4A, 4B,
The welding conditions such as welding current and welding time in 4C,... Can be set. In the drawing, reference numeral 6 denotes each of the welding guns 4A, 4B, 4C,.
The welding order determination device 6 determines the welding order of the power supply device 1 and the switching devices 3A, 3A.
Are commonly connected to the control circuit of the discharge thyristor in B, 3C,... When using the illustrated apparatus configured as described above, the power supply device 1 is installed at the work site or at an appropriate place near the work site when it cannot be carried into the work site, and the welding cable 2 and the control cable are extended therefrom. Each switching device 3A, 3B, 3C, ... and each welding condition setting device 5A, 5
B, 5C,... Are arranged at respective work sites, and welding guns 4A, 4B, 4C,.
Connect to 3B, 3C, ... Each worker has a welding condition setting device 5A, 5B, 5C, ... which is arranged with welding conditions such as welding current and welding time according to the stud to be welded.
・ By setting the welding gun with the stud to be welded mounted on the part to be welded on the base metal and pulling the trigger, the discharge thyristor in the combined switching device is fired, thereby setting the welding conditions A predetermined welding energy from the power supply 1 is passed through the welding cable 2 based on the welding conditions set by the apparatus, and a stud and a base metal to be welded via a fired discharge thyristor and a welding gun in the combined switching device. Supplied during
Welding is performed. In this case, since the operation order of each welding gun is determined by the welding order determination device 6, simultaneous work with the welding guns of other workers who are working in the same work site or another work site in the same manner is not performed. Avoided, each operator can easily and reliably perform stud welding according to the priority. [Effect of the Invention] As described above, in the multi-stage arc stud welding apparatus according to the present invention, a plurality of switching devices for extracting welding energy are connected in series to a welding cable from one power supply device, A welding gun and a welding condition setting device are connected to one power supply device via each switching device, and the operation order of each welding gun is determined by a welding order determination device so that one welding gun can be operated at a time. Therefore, the operator using each welding gun can set welding conditions arbitrarily with the combined welding condition setting device, so that welding work can be reliably performed even under different welding conditions. Can be done, and the welding gun will be triggered in the determined welding order,
Damage to stud welding and useless operation due to simultaneous overlapping operation can be avoided, and as a result, stud welding can be performed efficiently. In addition, stud welding can be performed easily and efficiently even at narrow welding spots or high-altitude welding spots, since remote operation can be performed at the welding spot without having to bring a heavy and bulky power supply to the welding spot. Becomes possible.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram schematically showing a welding apparatus according to an embodiment of the present invention. In the figure, 1: power supply, 2: welding cable, 3A, 3B, 3C, ...
*: Switching device, 4A, 4B, 4C, ...: welding gun,
5A, 5B, 5C, ...: welding condition setting device, 6: welding order determination device.

Claims (1)

(57) [Claims] In a multi-stage arc stud welding apparatus in which stud welding is sequentially performed at a plurality of locations with a plurality of welding guns using one common power supply device having a current-voltage control circuit to supply a required level of welding energy. A switching device for extracting welding energy, comprising a discharge thyristor connected to a welding energy supply cable from the common power supply device and operated by a trigger operation of a welding gun, and a control circuit therefor; and the welding energy extracting device. A welding condition setting device connected to the control circuit of the discharge thyristor in the switching device for setting welding conditions such as welding current and welding time of the combined welding gun is provided in combination with each welding gun, and Discharge of common power supply and switching device for extracting each welding energy One welding rank determining device that is commonly connected to the control circuit of the iris and determines the welding rank of each welding gun is provided in common for each welding gun, so that the operation ranking of each welding gun can be displayed. A multi-stage arc stud welding apparatus, characterized in that: