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Spot welding method

A spot welding, metal plate technology, applied in welding equipment, welding power source, resistance welding equipment, etc., can solve problems such as splashing, excessive nugget growth, etc.

Active Publication Date: 2021-06-11
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the other hand, if the current is continuously applied between the pair of electrode chips, the nugget will grow excessively, and the plastic metal ring area formed between two or more metal plates (the unmelted pressure bond formed on the outside of the nugget) may be formed. part) protrudes, and as a result the nugget is exposed, and sputtering (sputtering) may occur

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] In Example 1, the peak current value A1 was 14.6 kA, the effective current value A2 was 7.8 kA, the peak duration T1 was 0 ms, and the peak-free duration T2 was 5.9 ms. As a result, in Example 1, the lower limit current value A3 was 6.9 kA, the upper limit current value A4 was 8.42 kA, the difference A5 between the upper limit current value A4 and the lower limit current value A3 was 1.52 kA, and the peak duration T1 / no-peak duration T2 If it is 0, the effective current value A2 / peak current value A1 is 0.53, the rising edge time T3 / falling edge time T4 is 0.79, and no splash occurs, the welding result is determined as OK.

[0091] In Examples 1 to 8 and Comparative Examples 1 to 5, it was determined whether or not the following conditions 1 to 10 were satisfied.

[0092] [Condition 1]

[0093] The laminated body 15 is formed by stacking three or more metal plates (first to third metal plates W1 to W3), and among the three or more metal plates (first to third metal pla...

Embodiment 2

[0115] In Example 2, the peak current value A1 was 14.6 kA, the effective current value A2 was 7.8 kA, the peak duration T1 was 0 ms, and the peak-free duration T2 was 8.7 ms. As a result, in Example 2, the lower limit current value A3 was 6.9 kA, the upper limit current value A4 was 8.42 kA, the difference A5 between the upper limit current value A4 and the lower limit current value A3 was 1.52 kA, and the peak duration T1 / no-peak duration T2 If it is 0, the rising edge time T3 / falling edge time T4 is 0.42, and no splash occurs, the welding result is judged as OK.

[0116] In Example 2, the above-mentioned conditions 1 to 6, 8, and 9 were satisfied. In addition, in Example 2, the unsatisfactory effective current value A2 is set to 0.5 to 0.6 times the peak current value A1, the peak-free duration T2 is set to 6 ms to 13.6 ms, and the peak duration T1 is set It is a part of conditions 7 (0.53 times, 8.7 ms, 0 in Example 7) of 1 / 15 (0.066) to 1 / 10 (0.1) of the peak-free durati...

Embodiment 3

[0118] In Example 3, the peak current value A1 was 14.6 kA, the effective current value A2 was 7.8 kA, the peak duration T1 was 0.9 ms, and the peak-free duration T2 was 8.6 ms. As a result, in Example 3, the lower limit current value A3 was 6.5 kA, the upper limit current value A4 was 7.9 kA, the difference A5 between the upper limit current value A4 and the lower limit current value A3 was 1.4 kA, and the peak duration T1 / peak-free duration T2 It is 0.105, the rising edge time T3 / falling edge time T4 is 0.43, and no splash occurs, the welding result is judged as OK.

[0119]In Example 3, the above-mentioned conditions 1 to 6, 8, and 9 were satisfied. In addition, in Example 1, the unsatisfactory effective current value A2 is set to 0.5 to 0.6 times the peak current value A1, the peak-free duration T2 is set to 6 ms to 13.6 ms, and the peak duration T1 is set It is a part of condition 7 (0.53 times, 8.6 ms, 0.105 in Example 7) of 1 / 15 (0.066) to 1 / 10 (0.1) of the peak-free d...

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Abstract

Provided is a spot welding method whereby it is possible to reliably weld while suppressing the occurrence of expulsion. First through third metal plates W1-W3 were welded, in which the ratio of the total thickness thereof with respect to the thickness of the first metal plate W1 was 7. In Example 1, the peak current value A1 was 14.6 kA, the effective current value A2 was 7.8 kA, the peak duration T1 was 0 ms, and the no-peak duration T2 was 5.9 ms. As a result, in Example 1, the lower-limit current value A3 was 6.9 kA, the upper-limit current value A4 was 8.42 kA, the difference A5 between the upper-limit current value A4 and the lower-limit current value A3 was 1.52 kA, peak duration T1 / no-peak duration T2 was 0, effective current value A2 / peak current value A1 was 0.53, and rising time T3 / falling time T4 was 0.79, and there was no expulsion, and the welding result was determined as OK.

Description

technical field [0001] The present invention relates to a spot welding method. Background technique [0002] When welding two or more metal plates, spot welding is performed using a spot welding apparatus. In spot welding, in a state where two or more metal plates are sandwiched between a pair of electrode chips, electricity is energized between a pair of electrode chips, whereby a nugget is generated between the two or more metal plates, and the 2 or more metal plates are More than one metal plate is welded. [0003] In Patent Document 1, in a state where two or more metal plates are sandwiched between two electrodes, two or more DC micropulses are applied to two or more metal plates by a pair of electrodes, whereby two or more metal plates are Metal plates are welded. [0004] In spot welding, when the energization between a pair of electrode chips is short, the nugget cannot grow to a size required for welding, and welding may not be performed. On the other hand, if e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K11/11B23K11/24
CPCB23K11/24B23K11/115
Inventor 渡边信也齐藤仁谭锡昊
Owner HONDA MOTOR CO LTD