AutomotiveAutomotive
Automotive
BIW resistance spot welding
桥田
Application Background
Resistance spot welding is one of the key processes in body-in-white (BIW) manufacturing, and electrode cap dressing is critical to ensuring weld spot quality. Electrode caps wear during use, which affects welding quality; periodic dressing restores the shape and performance of the electrode caps, thereby ensuring welding quality. The electrode cap dresser is equipment specifically used for BIW resistance welding production lines, with at least one dresser required per welding gun. Qiaotian Intelligent has successively collaborated with automotive OEMs A, B, and C on their BIW resistance spot welding production line projects.
Sore Point
桥田
Common issues faced by these OEMs in electrode cap dressing include: the shaping principle is limited to custom tapered caps; the cutting tools are fragile and have a short service life; the electrode caps have a short service cycle; and weld spot quality needs improvement. In terms of differentiated pain points: Plant B faced challenges in achieving stable dressing for 18° large-angle special-shaped welding guns, difficulty in adapting to small throat depth welding gun models, insufficient dressing stability for single-sided welding, and swing interference and unreachable positions with legacy-brand swing-arm dressers. Plant C faced issues such as difficulty in guaranteeing stable dressing of electrode caps for narrow-edge welding and difficulty in adapting to small throat depth welding gun models.
桥田
How To Solve
桥田
To address the common dressing quality issues, Qiaotian achieved stable dressing of standard spherical caps through shaping cutter design, material optimization, and process innovation. Tool life has been extended to 50,000–100,000 cycles, and the theoretical service life of a single pair of electrode caps can reach up to 20,000 weld spots (compared with only about 3,000 for cutting-type dressers). The solution also ensures a flat cap end face, reduces welding spatter, and guarantees weld nugget strength and appearance quality. For OEM B's challenges, Qiaotian provided a customized solution: customized design ensures stable and reliable dressing of 18° large-angle special-shaped welding guns; a modular design enhances the axial load-bearing capacity, maintains balanced force distribution, and improves durability for single-sided welding with small throat depth; and legacy-brand swing-arm dressers were retrofitted by increasing the floating cylinder stroke and extending the guide rods and mounting backplate, eliminating swing interference and unreachable positions. For OEM C's challenges, Qiaotian likewise provided a systematic customized solution: narrow-edge welding electrode cap dressing adopts a two-stage cutting design — the first stage cuts the side deformation melting point, and the second stage cuts the small convex surface, using the 13 mm electrode outer diameter as a guide, with an improved chip discharge port. The two-stage guide coordination ensures a stable and reliable dressing process. For the difficulty in adapting to small throat depth welding gun models, customized design meets their dressing requirements.
Application Scenario
Application Cases
Submitted successfully
make certain
Shanghai Qiaotian Intelligent Equipment Co.,Ltd
Address:Building 4, No. 55, Bixi Road, Minhang District, Shanghai, China
Business Consultancy:400-105-3088
After-Sales Support:400-103-3880
Contact Us:021-67105330
Zhejiang Qiaotian Intelligent Equipment Co.,Ltd
Address:North Side, 1st Floor, Factory Building 6, No.1 Weizhong Road, Jiashan County, Jiaxing City, Zhejiang Province, China
WeChat Official Account
WeChat Official Account
WeChat Channel
WeChat Channel
Copyright © 2026 Shanghai Qiaotian All Rights Reserved.Shanghai ICP No. 16054250  SiteMap