伊人伊人伊人-伊人伊人网-亚洲av综合色区-亚洲av中文无码乱人伦在线视色-少妇饥渴放荡91麻豆-少妇黄色片-日本www在线观看-日本www在线-嫩草视频在线观看-嫩草视频在线播放-久久精品一区二区三区四区-久久精品一区二区三区不卡牛牛-国产又粗又黄视频-国产又粗又黄的视频-丰满人妻av一区二区三区-丰满女人又爽又紧又丰满

In EV battery packs, the screws that clamp the top cover define both sealing integrity and electrical reliability. Yet these joints often suffer torque decay: the residual torque after tightening is lower than the value originally applied. Elastic recovery of materials, friction relaxation, and structural stress redistribution are the main causes. If torque drops too far, the cover loosens, risking leaks, connection failures, and safety hazards.

Proven countermeasures

1. Multi-step tightening strategy
   ? Step 1: Initial torque to seat the screw.
   ? Dwell pause: allow gasket and metal to settle.
   ? Step 2: Final low-speed rundown to target torque.
   The pause releases instantaneous stress, so the retained torque meets specification.

2. Multi-axis synchronous tightening
   All cover screws are tightened in parallel with identical torque/angle curves. Synchronized waiting and stress-relief phases eliminate the uneven clamping that occurs with sequential tightening.

Danikor support

? High-precision smart drivers execute any multi-step profile (torque, angle, time).
? Multi-axis controller keeps up to 32 spindles perfectly synchronized.
? Real-time data logging proves every joint meets the residual-torque spec.

Using these strategies with Danikor equipment reliably defeats torque decay, ensuring every battery top cover remains secure for the life of the vehicle.