Chang’an Liangjiang No. 3 factory assembly

08/15/2025

Customer case: Chang’an Liangjiang No. 3 Factory × Chongqing Hongguang Electromechanical Equipment Co., Ltd

Welding workshop sealing system mechanical pressure reducing valve upgrade project

Project background

Liangjiang and Sanfactories encountered technical bottlenecks when undertaking BYD’s CTB battery chassis project in 2025:

  • Conventional pressure reducing valve pressure drift to reach±12%, resulting in an average of 25 seal failures per week
  • Manual glue preheating is required180 seconds, annual lost work losses exceeded900,000 yuan
  • The viscosity of the compound fluctuates due to environmental influences40%, the pass rate is only 89.7%

Hongguang Machinery Solution (Dual-Core Drive System)

Patent No.: ZL2025 2 0321548.3 ISO 16089 certification system

(1) HG-MRV55 mechanical pressure reducing valve

  • Five-level pressure step adjustment: output pressure fluctuation <±0.4%
  • Adaptive compensation mechanism: 0.2-0.8MPa global voltage regulation

(2) HG-HT200 manual smart glue gun

  • Transient heating technology: 30 seconds to 200°C operating temperature
  • Environmental compensation algorithm: < for controlling the fluctuation of viscosity of the compound±5%

Implementation process

2025.02.20-03.08

Extreme temperature change test (-20°C~80°C)

Zero rework record

2025.03.13

DNV GL certified

Marine standard

2025.03.14

The daily production capacity exceeded 18,000 pieces

UPH 850 pieces/hour

Comparison of core results

Key indicatorsOriginal systemAfter the renovationIndustry standard
Pressure stability±12%±0.4%±5%
Glue ready time180 seconds30 seconds60 seconds
Environmental adaptability15-35℃-20℃~80℃-10℃~50℃

“In the 80°C high temperature simulation test, Hongguang system Mechanical compensation mechanism The standard deviation of the output pressure is only 0.007MPa, and the error of sealant extrusion is < 0.3% for 72 consecutive hours. ”

—— Li Mingyang, Senior Engineer, Equipment Technology Department, Chang’an Liangjiang Factory

Technology derivative value

  • Construct a mechanical system health evaluation model to achieve preventive maintenance
  • Developed a self-learning system for environmental parameters and accumulated 23 climate response solutions
  • The device is compatible with the Industrial Internet of Things protocol and supports edge computing functions

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