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In Energy-Storage Spot-Welder Welding of Gas-Spring Cylinder and Screw, What Factors Are Mainly Related to Screw Tilting?
Sep 24,2026
Gas-spring cylinder-to-screw welding uses the projection-welding process of an energy-storage spot-welder, relying on instantaneous discharge and pressure to weld the screw projections onto the cylinder. Screw tilting is a common defect, shown as non-vertical, tilted, or loose screws. It not only affects assembly but also reduces joint strength.
I Positioning and Screw-Feeding Factors
1.Wear of screw positioning mechanism and feeding assembly leads to uncontrolled clearance and deviation of drop position.
2.Excessive clearance in screw conveying and drop positioning causes the screw itself to be not upright after positioning.
3.Inadequate support of the cylinder outer circumference allows radial swaying of the tube.
4.Uneven locating surfaces at the cylinder station and false support in the support area.
5.Inadequate tooling clamping and anti-rotation constraint of the cylinder causes displacement during welding.
II Electrode and Pressure-Head Factors
Deviation of upper-electrode perpendicularity, asymmetric end-face wear, inaccurate coaxiality, eccentric contact with the screw when pressing down, and unbalanced force distribution cause screw tilting.
III Incoming Condition of Screw and Cylinder
1.Non-uniform screw projection shape and deviation of the end face.
2.Abnormalities in the screw-to-cylinder projection contact surface and poor fitting.
3.Abnormal surface condition in the cylinder welding zone and unbalanced local contact resistance.
IV Parameter and Time-Sequence Factors
Unreasonable combination of pre-pressing and discharge time-sequence and lagging pressure response cause discharge to trigger before the screw is fully pressed and fixed, producing tilting defects.
V Equipment Rigidity and Accuracy Factors
Insufficient overall tooling rigidity causes hidden displacement under repeated impact; internal clearance and heat accumulation inside the equipment cause gradual deviation of welding accuracy.
VI Troubleshooting Suggestions
1.First look at the tilting direction: fixed-direction tilting — prioritize checking electrode centering, tooling positioning, and equipment platform levelness; irregular random tilting — focus on checking incoming material, surface oil contamination, air pressure, and welding energy.
2.Regularly dress electrodes and calibrate electrode coaxiality and end-face parallelism; promptly replace worn locating blocks and pins to ensure stable clamping.
3.When tilting faults occur, first check clamping and electrode condition, then adjust welding parameters.
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