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1、 Revision 1.0 ISSUED DATE: JUNE, 2004 Page 1 of 7 WELD SCHEDULES FOR SGM 50Hz OPERATION (informative) Spot Weld Time Selection The following tables outline the recommended weld schedules for Phase II of the Weld Tool Verification. The weld schedules are based on the GMT as defined in Section 4 of GM
2、 WS-1, Section A. The indicated weld schedules are suggested starting points for weld verification, not design values, and they do not intend to supersede any equipment design requirements specified in the GM WS-1, Section A. All button requirements must adhere to GM 4488M. 1. Weld currents outlined
3、 in the tables below assume size 2(16) dome or ball nose electrodes up to 1.84 mm and size 3(19) dome or ball nose electrodes above 1.85 mm GMT. The use of pointed or “A” nose electrodes will drive weld currents as much as 1000 A higher than those for ball nose electrodes. 2. Welding one weld gun fo
4、rce higher than suggested is allowed in robotic and manual operations, which may also drive higher weld currents. 3. When the total metal stackup exceeds 2.5 times the GMT, it may be necessary to increase the weld time as much as two ranges and may possibly increase the weld current as much as 1000
5、A. 4. When welding with a flat or long radius electrode (e.g., MWZ-6027) on one side or against a stationary backup, the weld time may increase by as many as two weld time ranges and currents may increase by as much as 1000 A. Revision 1.0 ISSUED DATE: JUNE, 2004 Page 2 of 7 Table I - 1: Bare-to-Bar
6、e Metal Combinations Weld Force (lbs.) Weld Current (kA) GMT Range (mm) Mild Steel HSLA Steel Total Weld Time (cycles) Pulse 1 Weld Time (cycles) Cool Time (cycles) Number of Pulses Mild Steel HSLA Steel Hold Time (cycles) 0.70 1.09 480 670 8 8 - 1 8.5 9.0 2 1.10 1.39 670 950 9 9 - 1 9.0 9.5 2 1.40
7、1.59 950 950 10 10 - 1 9.5 9.5 2 1.60 1.79 950 1200 12 6 1 2 10.0 10.5 4 1.80 2.09 1200 1200 15 5 1 3 10.5 10.5 4 2.10 2.39 1200 1600 18 6 1 3 11.0 11.5 4 2.40 2.79 1600 1600 21 7 2 3 11.5 11.5 8 2.80 2.99 1600 1900 24 6 2 4 12.0 12.5 8 3.00 3.40 1900 1900 24 6 2 4 12.5 12.5 8 Revision 1.0 ISSUED DA
8、TE: JUNE, 2004 Page 3 of 7 Table I - 2: Bare-to-Galvanneal Metal Combinations Weld Force (lbs.) Weld Current (kA) GMT Range (mm) Mild Steel HSLA Steel Total Weld Time (cycles) Pulse 1 Weld Time (cycles) Cool Time (cycles) Number of Pulses Mild Steel HSLA Steel Hold Time (cycles) 0.70 1.09 480 670 9
9、9 - 1 8.0 8.5 2 1.10 1.39 670 950 10 10 - 1 8.5 9.0 2 1.40 1.59 950 950 12 6 1 2 9.0 9.0 2 1.60 1.79 950 1200 15 5 1 3 10.0 10.5 4 1.80 2.09 1200 1200 18 6 1 3 10.5 10.5 4 2.10 2.39 1200 1600 21 7 1 3 11.0 11.5 4 2.40 2.79 1600 1600 24 6 2 4 11.5 11.5 8 2.80 2.99 1600 1900 28 7 2 4 12.0 12.5 8 3.00
10、3.40 1900 1900 28 7 2 4 12.5 12.5 8 Revision 1.0 ISSUED DATE: JUNE, 2004 Page 4 of 7 Table I - 3: Bare-to-Galvanized Metal Combinations Weld Force (lbs.) Weld Current (kA) GMT Range (mm) Mild Steel HSLA Steel Total Weld Time (cycles) Pulse 1 Weld Time (cycles) Cool Time (cycles) Number of Pulses Mil
11、d Steel HSLA Steel Hold Time (cycles) 0.70 1.09 480 670 9 9 - 1 9.0 9.5 2 1.10 1.39 670 950 10 10 - 1 9.5 10.0 2 1.40 1.59 950 950 12 6 1 2 10.0 10.0 2 1.60 1.79 950 1200 15 5 1 3 10.5 11.0 4 1.80 2.09 1200 1200 18 6 1 3 11.0 11.5 4 2.10 2.39 1200 1600 21 7 1 3 11.5 12.0 4 2.40 2.79 1600 1600 24 6 2
12、 4 12.0 12.0 8 2.80 2.99 1600 1900 28 7 2 4 12.5 13.0 8 3.00 3.40 1900 1900 28 7 2 4 13.0 13.0 8 Revision 1.0 ISSUED DATE: JUNE, 2004 Page 5 of 7 Table I - 4: Galvanneal-to-Galvanneal Metal Combinations Weld Force (lbs.) Weld Current (kA) GMT Range (mm) Mild Steel HSLA Steel Total Weld Time (cycles)
13、 Pulse 1 Weld Time (cycles) Cool Time (cycles) Number of Pulses Mild Steel HSLA Steel Hold Time (cycles) 0.70 1.09 480 670 12 12 - 1 9.0 9.5 2 1.10 1.39 670 950 14 14 - 1 9.5 10.0 2 1.40 1.59 950 950 18 6 1 3 10.0 10.0 2 1.60 1.79 950 1200 21 7 1 3 10.5 11.0 4 1.80 2.09 1200 1200 24 6 2 4 11.0 11.5
14、4 2.10 2.39 1200 1600 28 7 2 4 11.5 12.0 4 2.40 2.79 1600 1600 30 6 2 5 12.0 12.0 8 2.80 2.99 1600 1900 35 7 2 5 12.5 13.0 8 3.00 3.40 1900 1900 35 7 2 5 13.0 13.0 8 Revision 1.0 ISSUED DATE: JUNE, 2004 Page 6 of 7 Table I - 5: Galvanneal-to-Galvanized Metal Combinations Weld Force (lbs.) Weld Curre
15、nt (kA) GMT Range (mm) Mild Steel HSLA Steel Total Weld Time (cycles) Pulse 1 Weld Time (cycles) Cool Time (cycles) Number of Pulses Mild Steel HSLA Steel Hold Time (cycles) 0.70 1.09 480 670 12 12 - 1 9.5 10.0 2 1.10 1.39 670 950 14 14 - 1 10.0 10.0 2 1.40 1.59 950 950 18 6 1 3 10.5 11.0 2 1.60 1.7
16、9 950 1200 21 7 1 3 11.0 11.5 4 1.80 2.09 1200 1200 24 6 2 4 11.5 12.0 4 2.10 2.39 1200 1600 28 7 2 4 12.0 12.0 4 2.40 2.79 1600 1600 30 6 2 5 12.5 13.0 8 2.80 2.99 1600 1900 35 7 2 5 13.0 13.0 8 3.00 3.40 1900 1900 35 7 2 5 13.5 13.5 8 Revision 1.0 ISSUED DATE: JUNE, 2004 Page 7 of 7 Table I - 6: G
17、alvanized-to-Galvanized Metal Combinations Weld Force (lbs.) Weld Current (kA) GMT Range (mm) Mild Steel HSLA Steel Total Weld Time (cycles) Pulse 1 Weld Time (cycles) Cool Time (cycles) Number of Pulses Mild Steel HSLA Steel Hold Time (cycles) 0.70 1.09 480 670 12 12 - 1 10.0 10.0 2 1.10 1.39 670 9
18、50 14 14 - 1 10.5 11.0 2 1.40 1.59 950 950 18 6 1 3 11.0 11.5 2 1.60 1.79 950 1200 21 7 1 3 11.5 12.0 4 1.80 2.09 1200 1200 24 6 2 4 12.0 12.0 4 2.10 2.39 1200 1600 28 7 2 4 12.5 13.0 4 2.40 2.79 1600 1600 30 6 2 5 13.0 13.0 8 2.80 2.99 1600 1900 35 7 2 5 13.5 13.5 8 3.00 3.40 1900 1900 35 7 2 5 14.0 14.0 8