Metal welding leader

The shell of an air‑conditioning compressor is a core pressure‑bearing and sealing structure of refrigeration systems. Conventional segmented welding requires multiple clamping and spot welding operations. Uneven thermal and mechanical loading of the shell easily causes cylinder deformation, roundness deviation, inconsistent weld‑spot strength, local cold‑joint leakage and other defects. Subsequent problems such as assembly jamming, abnormal operating noise and refrigerant leakage may occur.

The Haifei three‑head shell‑welding machine for air‑conditioning compressors is specially developed for three‑point welding conditions of compressor shells. It adopts a three‑head balanced welding architecture. The shell obtains even heat and force, weld‑spot quality is uniform, and structural forming is regular. It effectively improves sealing performance and operating stability of compressors.

I Customer Background and Pain Points

One customer specializes in producing shells, supporting fulcrums and connecting structural parts for air‑conditioning compressors for compressor assembly.

Production pain points of the original welding process:

1.Conventional equipment performs single‑point segmented welding. The shell undergoes repeated local heating and uneven stress distribution, easily leading to cylinder deformation, roundness deviation and tilted fulcrums. This results in abnormal internal assembly gaps and high overall operating noise.

2.Parameters for three‑point welding cannot be unified. Differences exist in penetration depth and nugget size among each welding point, readily generating micro‑pores, incomplete fusion and cold joints.

3.Poor forming consistency in segmented welding. Uneven stress on three supporting points. After long‑time vibration during compressor operation, weld spots tend to suffer fatigue cracking and structural loosening.

4.Multiple clamping operations cause positioning deviation. Much manual intervention and cumbersome procedures. Lack of parameter system; process data can hardly be traced.

II Customer Requirements

1.Adopt three‑head welding architecture, complete three‑point simultaneous fusion‑forming within one clamping setup, mitigate stress and temperature‑difference unevenness caused by segmented welding.

2.Adapt to sheet‑metal material characteristics of shells, evenly control heat input and forming pressure, stabilize shell roundness and assembly accuracy, reduce assembly anomalies and abnormal operating noise.

3.Optimize three‑point welding forming effect, improve weld‑spot compactness, reduce defects including pores and cold joints, stabilize high‑pressure sealing performance of shells.

4.Support parameter storage and rapid production change‑over for shells of multiple models. Process data shall be storable and traceable. Synchronization performance of three‑head welding shall be stable.

III Custom‑Developed Solutions

Targeting customer requirements, the dedicated R&D team repeatedly tuned and optimized schemes in view of three‑point‑welding difficulties of air‑conditioning compressor shells, to ensure deliverables fit customer demands. Details are as follows:

1.Process verification: Conduct multiple groups of simultaneous‑welding process tests for shells of different models regarding diameter, plate thickness, point‑to‑point spacing and force‑bearing characteristics.

2.Equipment selection: Adopt Haifei three‑head shell‑welding machine for air‑conditioning compressors. Three‑point pressure application ensures even overall thermal and mechanical loading of shells. One‑step forming relieves stress imbalance, deformation and insufficient symmetry caused by segmented welding. Welding output at each point is even and stable, weld nuggets are full and compact with few forming defects, delivering good shell sealing performance. The equipment applies balanced low‑heat‑input technology; heat‑affected zones are evenly dispersed and shell deformation remains controllable.

3.Structural design: The complete machine runs smoothly; three‑head welding delivers stable performance and reliable long‑term operation. Custom‑built exclusive tooling for shells stabilizes workpiece clamping reference, reduces positioning offset and uneven gaps, and guarantees precise three‑point welding positions.

4.Core Advantages

Uniform forming: low deformation, good performance.

Excellent sealing: solid weld spots, leakage‑proof.

High efficiency: fewer procedures, stable quality.

IV Delivery, After‑Sales Service and Customer Feedback

Pre‑acceptance and equipment inspection were carried out.

Continuous trial operation maintains stable welding pass rate. After commissioning, all original production pain points of the customer are fully resolved. Timely, professional and thoughtful after‑sales service earns positive customer comments.

V Haifei’s Mission of Meeting Customized Customer Demands

Haifei adheres to the philosophy of “Creating Value for Customers”. All work starts from customer requirements. What are your specific welding requirements? Do you need automation, integration or complete production‑line solutions? Please inform us, and Haifei will carry out targeted equipment R&D and customization for you.

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