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Project Introduction: 6-Station Special Nut Projection Welding Machine for Bumper Brackets

Aug 11,2026

Bumper brackets are mostly thin sheet metal structures with numerous nut welding points per workpiece and heavy processing demands. Traditional welding machines feature single-function processes, long material change waiting time and slow production rhythm. Repeated clamping causes positioning deviation, resulting in nut cold joints, detachment, offset positions and sheet deformation. Haifei 6-station dedicated nut projection welding machine adapts to multi-point welding conditions of bumper brackets and realizes stable forming of multiple groups of nuts. It delivers uniform welding spots, precise positioning and minimal workpiece deformation, effectively solving low efficiency, unstable precision and inconsistent quality of traditional equipment.

I Customer Background & Production Pain Points

A manufacturer specializes in processing metal fittings including front & rear bumper brackets and vehicle body connecting brackets.

Deficiencies of original welding process:

1.Single-station equipment supports sequential operation only; welding, cooling and loading/unloading cannot run simultaneously, leading to long waiting time and low overall production pace.

2.Brackets feature complex structures with multiple welding spots. Repeated clamping on single station generates inconsistent benchmarks, causing nut offset and verticality deviation.

3.Conventional equipment outputs fluctuating pressure and energy, resulting in uneven penetration depth, cold joints, pseudo welds and loose welding points.

4.Thin-walled brackets have limited heat resistance; repeated heating leads to surface warpage, indentation and black discoloration.

5.Low automation level requires frequent manual material handling, triggering operation deviation; no parameter storage or data traceability system.

II Customer Requirements

1.Adopt six-station layout to separate different procedures and reduce equipment idle time.

2.Apply unified multi-station positioning structure to stabilize nut welding position and verticality, minimizing assembly deviation.

3.Maintain stable output of pressure and energy for full, firm weld penetration and reduce cold joint & detachment defects.

4.Reasonably control heat-affected zone to mitigate sheet warpage, indentation and blackening.

5.Support production of multiple product specifications with storable and traceable process data.

III Custom R&D Solutions

The dedicated R&D team optimized schemes repeatedly to tackle welding difficulties of bumper brackets:

1.Process Verification: Carry out batches of welding tests for brackets of various vehicle models, different sheet thicknesses and nut specifications.

2.Equipment Selection: Haifei 6-station dedicated nut projection welder enables smooth station switching and reliable positioning, greatly boosting production efficiency with stable pressure & energy output and uniform weld penetration.

3.Fixture Design: Custom exclusive positioning jigs for each station to reduce alignment gaps and offset errors.

4.Core Advantages

High Efficiency: Cyclic station operation, stable output

Stable Quality: Uniform welds, minimal deformation

Wide Compatibility: Quick product changeover, easy process control

IV Delivery & After-sales Feedback

Pre-acceptance and on-site equipment inspection were completed. Continuous trial runs maintained stable welding pass rate. After commissioning, all original production pain points were fully resolved. Customers praised timely, professional and thoughtful after-sales service.

V Haifei Corporate Mission

To fulfill customers’ customized welding demands is Haifei’s mission. We adhere to the philosophy of "Creating Value for Customers". Everything starts with your demands: whether you need single automatic machines, integrated units or full production lines, inform us of your welding requirements and Haifei will conduct targeted R&D and customization for you.