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Special-Purpose Welding Machine for Automotive Connecting Rods: What Key Points Should Be Noted in Workpiece Clamping and Positioning to Reduce Offset Defects?

Sep 24,2026

In automotive connecting rod butt-welding, offset appears when the end faces of two connecting rods fail to align, showing lateral deviation or angular tilting. Offset not only affects appearance but also reduces the load-bearing capacity of the joint.

I Hazards of Offset

1.The force-bearing cross-section changes abruptly at the butt-welded position, easily causing cracking from the offset location.

2.After assembly, motion becomes unbalanced, increasing vibration and noise.

3.Stress concentration forms at the offset, easily initiating cracks under alternating loads.

4.Connecting rods are moving parts; offset causes center-of-gravity shift, affecting overall machine balance.

5.Offset results in uneven machining allowance in subsequent processing.

II Core Key Points of Clamping and Positioning

1.The centers of the two clamps must be aligned.

2.The protruding length of workpieces must be consistent.

3.Clamping force must be sufficient.

4.Locating surfaces must fit tightly.

5.Centering must be stable.

6.Incoming-material condition must be stable.

III Improvement Methods

1.Periodically verify the coaxiality of left and right clamps and adjust deviations promptly.

2.Set clamping force according to workpiece specification; replace worn jaws in time.

3.Clean clamp locating surfaces and workpiece end faces before clamping.

4.When offset defects occur, first check clamping and positioning, then check welding parameters.

5.Strictly control incoming-material end-face quality.

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 special‑purpose 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 special‑purpose machines, please contact us: 400‑0510‑750.