A system managing a polishing state of tips of a welding gun of each welding robot installed in a production line of a vehicle includes: a robot controller storing tip polishing data including the number of polishing of the tips and a polishing amount of the tips generated after each tip dressing of the welding gun; and a server collecting the tip polishing data from the robot controller to store the collected data according to robot identification information of the robot and learning the store data through artificial neural network to generate reference data determining the polishing state of the tips corresponding to the robot identification information. The robot controller sets artificial neural network of the robot based on the reference data and determines whether a polishing state of the tips according to the number of polishing and the polishing amount of the tips is normal.

A device and method for monitoring and correcting the position and orientation of an operating device (2) with respect to a piece (P). A measuring device (5) including a plurality of sensors (505) connected to the operating device is used to measure through contactless technology the distances of the sensors from a surface (π) of the piece along respective directions (l, r, s) having given orientations. The sensor measurements are compared to predetermined desired values and the position of the operating device (2) is selectively changed to maintain a desired positional relationship between a main operative axis (X1) of the operative device and operation axis (X2) defined by the surface of the piece.

A plate thickness test mechanism includes a detection section that detects an abnormality when a plate thickness is thinner than a desired plate thickness by a predetermined amount or more or thicker than the desired plate thickness by the predetermined amount or more, a determination section that determines whether or not the detection section functions normally, and a plate-shaped test jig that has a first plate portion having a plate thickness thinner than a predetermined specific plate thickness, and a second plate portion having a plate thickness thicker than the specific plate thickness. The determination section determines whether or not a plate thickness test is normally performed on the basis of a detection result of the detection section obtained when the detection section tests the plate thicknesses of the first and second plate portions by taking the desired plate thickness as the specific plate thickness.

An apparatus for measuring alignment of a welding gun comprises a case comprising an interior space and an open side, a supporting member mounted to the interior space, an upper block comprising a first end fixed to the supporting member, formed with an upper tip insertion hole at a second end, hinge-engaged with an upper pin mounted to the case and configured to rotate when an upper tip is misaligned, an upper sensor unit mounted adjacent to the upper block to detect rotation of the upper block, a lower block having a first end fixed to the supporting member, formed with a lower tip insertion hole at a second end, hinge-engaged with a lower pin mounted to the case, and configured to rotate when a lower tip is misaligned, and a lower sensor unit mounted adjacent to the lower block configured to detect rotation of the lower block.

An apparatus for measuring alignment of a welding gun comprises a case comprising an interior space and an open side, a supporting member mounted to the interior space, an upper block comprising a first end fixed to the supporting member, formed with an upper tip insertion hole at a second end, hinge-engaged with an upper pin mounted to the case and configured to rotate when an upper tip is misaligned, an upper sensor unit mounted adjacent to the upper block to detect rotation of the upper block, a lower block having a first end fixed to the supporting member, formed with a lower tip insertion hole at a second end, hinge-engaged with a lower pin mounted to the case, and configured to rotate when a lower tip is misaligned, and a lower sensor unit mounted adjacent to the lower block configured to detect rotation of the lower block.

A joining device includes: a pair of pressing members disposed to face each other to sandwich joining target members from both sides in a stacking direction of the joining target members and configured to press the joining target members; and power supply members disposed on one or both sides in the stacking direction of the joining target members to sandwich a pressing target portion of the joining target members by the pressing members and configured to come into contact with and supply power to the joining target members. The power supply members are provided at positions not overlapping the pressing members in the stacking direction of the joining target members, and the pressing members press the joining target members while the power supply members supply power to the joining target members, thereby generating resistance heat in the pressing target portion and joining the joining target members.

A joining device includes: a pair of pressing members disposed to face each other to sandwich joining target members from both sides in a stacking direction of the joining target members and configured to press the joining target members; and power supply members disposed on one or both sides in the stacking direction of the joining target members to sandwich a pressing target portion of the joining target members by the pressing members and configured to come into contact with and supply power to the joining target members. The power supply members are provided at positions not overlapping the pressing members in the stacking direction of the joining target members, and the pressing members press the joining target members while the power supply members supply power to the joining target members, thereby generating resistance heat in the pressing target portion and joining the joining target members.

Proposed is a resistance spot welding method to join parts to be welded which are a plurality of overlapping metal sheets, including: dividing a current pattern into two or more steps for welding; before actual welding, performing test welding; and subsequently, as actual welding, performing adaptive control welding, in which the two or more steps for welding include a step of securing a current path between the sheets directly below the electrodes and a subsequent step of forming a nugget having a predetermined diameter, and a welding interval time is provided between these steps. This method thus yields a good nugget without causing splashing even under special welding conditions.

A system for resistance spot welding control and a method thereof are disclosed.

A system for regulating welding parameters of a spot welding machine joining a plurality of panels according to an aspect of the present disclosure includes an ultrasonic sensor installed inside an electrode of a welding gun, applying a ultrasonic wave to a welding part of the panel, and detecting a reflected ultrasonic signal; an ultrasonic analyzer capable of creating ultrasonic analysis information by analyzing in real time the ultrasonic signal; and a welding controller receiving the ultrasonic analysis information from the ultrasonic analyzer, performing adaptive welding control with the welding parameters set based on information of the panel, and compensating in real time one or more welding parameters according to the received ultrasonic analysis information.

A system for resistance spot welding control and a method thereof are disclosed.

A system for regulating welding parameters of a spot welding machine joining a plurality of panels according to an aspect of the present disclosure includes an ultrasonic sensor installed inside an electrode of a welding gun, applying a ultrasonic wave to a welding part of the panel, and detecting a reflected ultrasonic signal; an ultrasonic analyzer capable of creating ultrasonic analysis information by analyzing in real time the ultrasonic signal; and a welding controller receiving the ultrasonic analysis information from the ultrasonic analyzer, performing adaptive welding control with the welding parameters set based on information of the panel, and compensating in real time one or more welding parameters according to the received ultrasonic analysis information.