Abstract: A control method for an arc welding apparatus having a function of prohibiting detection of neck based on a change amount of welding voltage and an arc welding apparatus using the method. Thus, since neck determination can be carried out accurately by preventing wrong detection of neck, it is possible to reduce the occurrence of spatter.

Abstract: An electric device includes: first opening 7 provided on rear panel 4 to exhaust internal air out of casing 1; first partition 12 covering second opening 8 provided on left side panel 2 and having fourth opening 10; second partition 13 covering third opening 9 provided on right side panel 3 and having fifth opening 11; and radiator 14 disposed so as for opening 14C at one end to faceopening 7. The configuration can prevent weld spatters or the like from coming into casing 1 directly.

Abstract: A control method for an arc welding apparatus having a function of prohibiting detection of neck based on a change amount of welding voltage and an arc welding apparatus using the method. Thus, since neck determination can be carried out accurately by preventing wrong detection of neck, it is possible to reduce the occurrence of spatter.

Abstract: An electric equipment includes: first opening 7 provided on rear panel 4 to exhaust internal air out of casing 1; first partition 12 covering second opening 8 provided on left side panel 2 and having fourth opening 10; second partition 13 covering third opening 9 provided on right side panel 3 and having fifth opening 11; and radiator 14 disposed so as for opening 14C at one end to face opening 7. The configuration can prevent weld spatters or the like from coming into casing 1 directly.

Abstract: A control method for an arc welding apparatus having a function of prohibiting detection of neck based on a change amount of welding voltage and an arc welding apparatus using the method. Thus, since neck determination can be carried out accurately by preventing wrong detection of neck, it is possible to reduce the occurrence of spatter.

Abstract: A control method for an arc welding apparatus having a function of prohibiting detection of neck based on a change amount of welding voltage and an arc welding apparatus using the method. Thus, since neck determination can be carried out accurately by preventing wrong detection of neck, it is possible to reduce the occurrence of spatter.

Abstract: In a conventional arc welding robot control unit, since an emergency stop circuit for a robot and an emergency stop circuit for a welding machine exist independently of each other, not only the circuit configuration thereof is long but also the emergency stop enforcing processings and emergency stop removing processings are executed individually. To solve these problems, according to the invention, there is provided an arc welding robot control unit which comprises an inverter circuit 1 for enforcing arc welding, main power supply switches 2a-2c for turning on and off a main power supply used to supply power to the inverter circuit 1, a main power supply control part 3 for controlling the main power supply switches 2a-2c, and an emergency stop button 4 for emergency stopping the operation of a robot, wherein, when the emergency stop button 4 is depressed to thereby put the robot into emergency stop, the main power supply switches 2a-2c can be turned off in linking with the robot emergency stop.

Abstract: Electric power corresponding to the condition of at least one of a welding object and a welding wire as electric power for contact determination is outputted from an output control unit 2, and the state of contact is detected by a contact determination unit 5, so that it is possible to prevent the deformation and the like of the welding wire during contact.

Abstract: In the conventional arc welding control unit, since the air of the outside of the equipment is applied directly to the whole of the main semiconductor for cooling, there is found a problem that dust, welding fumes and the like can accumulate on or adhere to the conductive portions of the inside of the equipment, which takes time for maintenance of the equipment. To solve this, according to the invention, there is provided an arc welding control unit having a heat radiating unit built in the box body thereof for discharging the air heated by a heat generating first electrical element to the outside. The heat radiating unit has a tunnel-type shape including an outer peripheral portion for defining a cavity portion allowing the air to flow therethrough, whereby dust, welding fumes and the like can be prevented from accumulating on or adhering to the conductive portions of the inside of the equipment.

Abstract: In a conventional arc welding robot control unit, since an emergency stop circuit for a robot and an emergency stop circuit for a welding machine exist independently of each other, not only the circuit configuration thereof is long but also the emergency stop enforcing processings and emergency stop removing processings are executed individually. To solve these problems, according to the invention, there is provided an arc welding robot control unit which comprises an inverter circuit 1 for enforcing arc welding, main power supply switches 2a-2c for turning on and off a main power supply used to supply power to the inverter circuit 1, a main power supply control part 3 for controlling the main power supply switches 2a-2c, and an emergency stop button 4 for emergency stopping the operation of a robot, wherein, when the emergency stop button 4 is depressed to thereby put the robot into emergency stop, the main power supply switches 2a-2c can be turned off in linking with the robot emergency stop.

Abstract: The present invention provides an arc welder in which a robot controller of a teaching playback type robot and a welding power source are of digital control type and the robot controller and the welding power source are coupled through a bus. A welding condition command required for welding and a real welding condition are transmitted digitally through the bus in a parallel mode.

Abstract: The present invention provides an arc welder in which a robot controller of a teaching playback type robot and a welding power source are of digital control type and the robot controller and the welding power source are coupled through a bus. A welding condition command required for welding and a real welding condition are transmitted digitally through the bus in a parallel mode.

Abstract: In a consumable electrode type arc welding method, when short circuit shift welding is conducted at the start of an arc in the process of pulse arc welding and also when an inclinations of a rise or fall is decreased in the case of starting an arc in the process of pulse welding and also when an inclination of a short circuit current is increased, short circuit, which irregularly occurs at the start of an arc, can be released in a short period of time and the arc can be stabilized early. When the generation of a magnetic arc blow is suppressed, it becomes possible to form proper welding beads. Due to the foregoing, the efficiency of welding work can be enhanced.

Abstract: An arc welding machine which is capable of feeding a welding wire stably at low and a high speeds. The arc welding machine includes a welding wire feed rate setting section; a welding wire feed motor; a welding wire feed motor driving section which supplies electric power required for driving said welding wire feed motor; and a welding wire feed control section which uses, as a control frequency, a frequency other than a frequency of an input power supply or a frequency twice as high or three times as high, or a wire feed control section which selects a low control frequency for feeding a welding wire at a low rate and a high frequency for feeding the welding wire at a high rate, or a welding wire feed control section which selects a high control frequency for feeding the welding wire at a low rate and a low frequency for feeding the welding wire at a high rate.