Spot welding methods and control equipment for spot welding.

Abstract

OCR The spot welding method includes step one (S1) of the process of applying power by current. At the first (C1) while compressing the welding part (P) at the first compressive force (F1) by welding wire (10), step The second current (S2) in the operation is powered by a second current (C2) that is lower than the first current (C1). The third step (S3) in the process is to power the third current (C3) which is higher than the first current. (C1) and the fourth step (S4) in the operation is to power by the fourth current (C4) which is higher than the current value. The third (C3) and also includes the fifth step (S5) in the operation to provide power by the fifth current value (CS). This is greater than the second current value (C2) and reduces the power supply current to the sixth current value (C6). Less than the third current value (C3) at least.

Claims

OCR2 / 6 / 25651. Spot welding is the process of welding the weld (P) of a section made up of more than one sheet of metal by energizing the weld (P) in a condition where the weld (P) is compressed by a welding wire, in which the spot welding method is incorporated. <pstyle="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;-qt-block-indent:0;text-indent:0px;"> The process involves applying power at the first current (C1) while compressing the joint voltage (P). <pstyle="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;-qt-block-indent:0;text-indent:0px;"> At the first compressive force (F1) by the welding wire as step one. <pstyle="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;-qt-block-indent:0;text-indent:0px;"> The operation is powered by a second current (C2) that is lower than the first current (C1) while <pstyle="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;-qt-block-indent:0;text-indent:0px;"> Reduce the compression force of the welding wire from the initial compression force (F1) to a lower second compression force (F2). <pstyle="margin-top:0px;The first step (F1) as the second step. <pstyle="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;-qt-block-indent:0;text-indent:0px;"> The operation is powered by a third current (C3) that is higher than the first current (C1) while <pstyle="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;-qt-block-indent:0;text-indent:0px;"> The weld seam (P) is pressurized to a second compressive force (F2) by the welding wire as a third step. <pstyle="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;-qt-block-indent:0;text-indent:0px;"> The power is supplied by a higher current value (C4) than the third current value (C3) while compressing. <pstyle="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;-qt-block-indent:0;text-indent:0px;"> The welding pressure at the second compressive force (F2) by the welding wire as the fourth step and <pstyle="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;-qt-block-indent:0;The operation is powered by a fifth current value (C5) that is greater than the second current value (C2) while <pstyle="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;-qt-block-indent:0;text-indent:0px;"> Perform the second compression pressure (F2) after step two and before step three, and then <pstyle="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;-qt-block-indent:0;text-indent:0px;"> Therefore, the current is reduced when power is supplied to the sixth current (C6), which is less than the third current (C3). <pstyle="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;-qt-block-indent:0;text-indent:0px;"> As the fifth step. <pstyle="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;-qt-block-indent:0;text-indent:0px;"><pstyle="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;-qt-block-indent:0;text-indent:0px;"> 2. Spot welding method according to claim 1, where the amount of time for power supply is determined by the current value. <pstyle="margin-top:0px;margin-bottom:0px;margin-left:0px;The fifth step in the fifth step is defined to be shorter than the amount of time required for energizing in the third step. <pstyle="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;-qt-block-indent:0;text-indent:0px;"><pstyle="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;-qt-block-indent:0;text-indent:0px;"> 3. Control unit (30) for spot welding where the control unit (30) for welding <pstyle="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;-qt-block-indent:0;text-indent:0px;"> The point is connected using a spot welding machine which welds the welded section (P) of the part created by the plate. <pstyle="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;-qt-block-indent:0;text-indent:0px;"> More than one metal is joined by applying energy to the weld (P) in a state where the weld (P) is compressed. <pstyle="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;-qt-block-indent:0;text-indent:0px;">By welding wire where the controller (30) for spot welding controls the current value when supplying <pstyle="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;-qt-block-indent:0;text-indent:0px;"> The energy and compressive force of the welding wire, which is included in the control device for spot welding. <pstyle="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;-qt-block-indent:0;text-indent:0px;"> The first step for operating the power supply is to apply the current value at the first (C1) while compressing. <pstyle="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;-qt-block-indent:0;text-indent:0px;"> Welding pressure (P) at the first compressive force (F1) by welding wire (10) <pstyle="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;-qt-block-indent:0;text-indent:0px;"> The second step for powering the system is by applying a lower second current (C2) than the first current. <pstyle="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;-qt-block-indent:0;text-indent:0px;">At the first (C1) while reducing the compression force of the welding wire (10) from the first compression force (F1) to the second compression force. <pstyle="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;-qt-block-indent:0;text-indent:0px;"> The second (F2) compressive force is lower than the first (F1) compressive force. <pstyle="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;-qt-block-indent:0;text-indent:0px;"><pstyle="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;-qt-block-indent:0;text-indent:0px;"> The third step for powering the operation is by applying a higher third current (C3) than the first current. <pstyle="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;-qt-block-indent:0;text-indent:0px;"> At the first (C1) while compressing the weld section (P) at the second compressive force (F2) by the welding wire (10). <pstyle="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;-qt-block-indent:0;text-indent:0px;"> The fourth step involves controlling the compressive force and current to operate the power supply. <pstyle="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;The fourth current (C4) is higher than the third current (C3) while applying compression pressure (P) to the joint. <pstyle="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;-qt-block-indent:0;text-indent:0px;"> The second (F2) by welding wire (10) and <pstyle="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;-qt-block-indent:0;text-indent:0px;"> The fifth step involves controlling the compressive force and current values ​​to deliver power. <pstyle="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;-qt-block-indent:0;text-indent:0px;"> The fifth current (C5) is greater than the second current (C2) while the compression is being performed at the compressive force. <pstyle="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;-qt-block-indent:0;text-indent:0px;"> The second (F2) is after step two and before step three, and then to reduce the current when there is a <pstyle="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;-qt-block-indent:0;text-indent:0px;">Implement energy to the sixth current (C6) which is less than the third current (C3);

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