Welding workshop of Chang’an Liangjiang No. 3 Factory

08/11/2025

Customer case: Yangtze River Liangjiang No. 3 Factory × Chongqing Hongguang Electromechanical Equipment Co., Ltd

Welding workshop 318 project pneumatic gluing system upgrade project

Delivery time: March 14, 2025 15:50 (Friday, the fifteenth day of the second lunar month, the Year of the Snake)

Project background

The Liangjiang plant faced special challenges when undertaking the Volkswagen MEB platform battery tray welding and sealing project:

  • The pressure of compressed air in the workshop fluctuates up to 1 ±15%, resulting in an average of 47 seal failures per month
  • Manual applicator temperature response delayed 8-12 seconds, the annual rework cost exceeded 1.2 million yuan
  • The 55-gallon large plastic drum takes time to change the glue 45 minutes/time, affecting the JPH value of the production line

Hongguang pneumatic system solutions

Patent No.: ZL2025 2 0321548.3 ATEX explosion-proof certification

(1) HG-QDR55 pneumatic pressure regulation system

  • Dual-channel pressure compensation: volatility <±0.6%（0.3-0.7MPa）
  • Intelligent air pressure memory: automatically matches 12 welding process parameters

(2) HG-MH2000 manual smart glue

  • Millisecond temperature control response: from normal temperature to 180°C3.5 seconds
  • Ergonomic design: reduced operating force40%, the fatigue index decreased by 60%

Project milestones

Key indicatorsBefore the renovationCurrent levelGerman standard
Weld seal pass rate92.3%99.98%99.5%
Glue change time45 minutes8 minutes and 30 seconds20 minutes
Glue response speed8-12 seconds≤ 1 second3 seconds

“In the 0.3MPa low-voltage test, Hongguang system Dual-channel dynamic compensation technology The pressure fluctuation was only ± 0.15%, and the permeability of the sealant was tested for 12 hours < 0.01 μL/min. “

—— Wang Zhenyu, Chief Engineer of Liangjiang Factory Welding Research Institute

Technology extension application

  • Developed a library of pneumatic models for welding workshops, including 18 pressure curve templates
  • The glue gun has a built-in RFID identification system to realize full traceability of rubber batches
  • The system is compatible with Industry 4.0 protocol and is connected to the factory MES system

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