DEVICE FOR BLOCKING COOLING WATER OF WELD GUN

WIPO Patent Application WO/2018/124647

A1

The present invention relates to a device for blocking cooling water of a weld gun, the device preventing water leakage by blocking the cooling water leaking from the weld gun when a tip provided to the weld gun is replaced. The device for blocking the cooling water of the weld gun comprises: a first piston valve (23) connected to a first solenoid valve (17), operated by a signal of a control unit, so as to start operation according to a signal thereof, and receiving the cooling water from a cooling water inlet end; a main supply pipeline (23) of which one side is connected to a cooling water inlet pipe (27) of the weld gun and the other side is connected to an outlet end of the first piston valve (23); a second piston valve (29) operated by a first solenoid valve (15), and provided on a main discharge pipeline (31) so as to cut off the cooling water discharged or allow the same to pass therethrough; a suction means (35) for suctioning the cooling water filled in the pipeline by means of vacuum and holding the same when the weld gun tip is removed such that the pipeline is opened; and a pressure sensor (49) for sensing that the weld gun tip is separated and the pressure of the pipeline instantly drops so as to drive a circuit, thereby sensing an instant change in fluid pressure; and a cleaning means (47) for removing scales and foreign substances accumulated inside the weld gun, using spraying of air pressure.

LIM JONG CHAN (KR)

PCT/KR2017/015305

July 05, 2018

December 22, 2017

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ATRON INC (KR)

B23K11/30; B23K11/11; B23K101/00

KR101514219B1	2015-04-22
KR20160032873A	2016-03-25
KR20160107807A	2016-09-19
KR101423201B1	2014-07-24
KR101590577B1	2016-02-01

PARK, Jun Yeon (KR)

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