Electrode position detecting system and method for spot welders
AssigneeNissan Motor Co., Ltd.
InventorMitsunori Kanjo
Life of this patent
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Abstract
A welding gun has a coordinate system fixed thereto, and a sensor is fixed to the coordinate system. The sensor senses a mobile electrode moved in a position, and a position detector cooperates with the sensor to detect the position of the mobile electrode relative to the welding gun.
Claims15
An electrode position detecting system for spot welders in which a welding robot manipulates a welding gun having a pair of relatively movable welding electrodes, the electrode position detecting system comprising:
- a coordinate system fixed to a welding gun;
- a sensor fixed to the coordinate system, the sensor sensing a mobile electrode moved in a position;
- and
- a position detector cooperative with the sensor to detect said position of the mobile electrode relative to the welding gun, wherein
- the sensor senses an end part of the mobile electrode, and
- said position of the mobile electrode represents a position of the end part of the mobile electrode relative to the welding gun.
The electrode position detecting system of clain 4, wherein the controller recognizes a pressure-less contact between the mobile electrode and a stationary electrode fixed to the welding gun.
The electrode position detecting system of claim 8, wherein the controller controls the mobile electrode to exert a pressing force on the stationary electrode, before the mobile electrode enters the pressure-less contact.
An electrode position detecting system for spot welders in which a welding robot manipulates a welding gun having a pair of relatively movable welding electrodes, the electrode position detecting system comprising:
- a coordinate system fixed to a welding gun;
- sensor means fixed to the coordinate system, the sensor means sensing a mobile electrode moved in a position;
- and
- position detector means cooperative with the sensor means to detect said position of the mobile electrode relative to the welding gun, wherein
- the sensor means senses an end part of the mobile electrode;
- and
- said position of the mobile electrode represents a position of the end part of the mobile electrode relative to the welding gun.
An electrode position detecting method for spot welders in which a welding robot manipulates a welding gun having a pair of relatively movable welding electrodes, the electrode position detecting method comprising:
- having a coordinate system fixed to a welding gun;
- fixing a sensor to the coordinate system;
- sensing by the sensor a mobile electrode moved in a position;
- and
- having a position detector cooperating with the sensor to detect said position of the mobile electrode relative to the welding gun, wherein
- said sensing by the sensor includes sensing an end part of the mobile electrode;
- and
- said position of the mobile electrode represents a position of the end part of the mobile electrode relative to the welding gun.
Dependencies are inferred from the claim text.