Robot controller for spot welding machine


PURPOSE: To maintain the welding quality satisfactory by monitoring a resistance value at the time of welding by comparing pulse width of a detection welding current and a welding current value at an arbitrary time point set in advance in the pulse width with a reference value. CONSTITUTION: After the lapse of prescribed time after welding is started, an output of a current detector 28 is subjected to digital conversion by an A/D converting circuit 44t and stored in a second storage means 54 under the control of a control means 66. Based on information of a stored welding current value, a numerical processing is executed by a variable arithmetic means 56 and a pulse width arithmetic means 58, and it is stored in a third storage means 60. Pulse width of a stored welding current with a reference value stored in a first storage means 50 are compared by a comparing means 62. When a result of decision is within an allowable value, sampling of the next welding current is started. When the result of decision is out of the allowable value, a buzzer of an alarm means 64 is sounded. COPYRIGHT: (C)1992,JPO&Japio




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    CN-102458752-AMay 16, 2012戴姆勒股份公司, 罗伯特·博世有限公司用于监测电阻焊钳的焊点质量的、包括输出报警信息的方法和控制装置
    JP-2007105736-AApril 26, 2007Yaskawa Electric Corp, 株式会社安川電機Power source for arc welding and method for controlling it
    WO-2010115524-A1October 14, 2010Robert Bosch Gmbh, Daimler AgProcédé et appareil de commande servant à surveiller une qualité de points de soudure d'une pince de soudage par résistance avec émission d'un signal d'alarme