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Problems Encountered When Welding Six Spots in One Cycle on Shock‑Absorber Bracket with Medium‑Frequency Spot‑Welder
Sep 11,2026
Automotive shock‑absorber brackets belong to chassis suspension safety components. A medium‑frequency spot‑welder is adopted for multi‑spot spot‑welding process, completing six weld spots simultaneously in one cycle.
Six‑spot simultaneous spot‑welding features short tact time and high efficiency. Multiple weld spots share equipment output energy, which readily causes current shunting, uneven pressure distribution and heat concentration.
I Process Difficulties of Six‑Spot Simultaneous Welding in One Cycle
When multiple spots are welded simultaneously, differences exist in circuit resistance of each point, easily bringing uneven energy distribution. Adjacent weld‑spot spacing is small. Mutual internal‑current shunting during welding greatly weakens effective fusion energy. Six spots release heat at the same time; concentrated heat cannot dissipate quickly. The bracket is prone to thermal deformation and large residual stress. Multi‑point pressure application may lead to workpiece displacement and indentation.
II Defect Problems
1.Divergent weld‑spot strength, partial cold joints and partial over‑burning
2.Bracket warping and twisting deformation
3.Uneven indentation depth of weld spots
4.Heavy welding spatter and excessive welding‑slag residue
5.Unstable batch quality with progressive quality degradation in continuous welding
III Improvement Solutions
1.Unify electrode condition and guarantee consistent pressure balance
2.Optimize welding time‑sequence to reduce deformation and cold joints
3.Adopt dedicated welding parameters for six‑spot welding
4.Optimize tooling positioning to prevent workpiece shift and suspension
5.Standardize incoming‑material control before welding
6.Establish maintenance system for electrodes and equipment
7.Improve inspection methods to eliminate hidden defects
Wuxi Haifei Intelligent Equipment Co., Ltd. https://www.haifeiwelder.com/
Wuxi Haifei Intelligent Equipment Co., Ltd. has been focusing on the R&D and production of spot‑welding machines for 17 years. The company has obtained ISO9001 Quality Management System Certification, China Compulsory Certification (3C) and CE Certification. It is a National High‑tech Enterprise, a Specialized, Refined, Differential and Innovative Enterprise of Jiangsu Province, a Specialized, Refined, Differential and Innovative Enterprise of Wuxi, and a Gazelle Enterprise in the Southern Jiangsu National Self‑Dependent Innovation Demonstration Zone.
Should you be interested in our spot‑welding machines, please contact us: 400‑0510‑750.
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Wuxi HAIFEI Intelligent Equipment Co., Ltd.
Wuxi HAIFEI Welding Equipment Co., Ltd.
Add: 28 Shuiyun Road, Yuecheng, Jiangyin, Jiangsu Province, China. (Postal Code: 214404)
Mobile: +86 18915302352
Email: wushijie@jshaifei.com