Ultrasonic testing of the residual stress of the cathode roll of the titanium cylinder of a 2.7 m lithium battery copper foil integrated machine
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摘要: 随着绿色新能源汽车的发展，锂电铜箔的需求量越来越大，高质量的电解铜箔厚度较薄，其质量受阴极辊表面状态和内部应力影响较大。针对国产化锂电铜箔一体机铜箔质量提升的需求，对其核心部件阴极辊的残余应力进行了超声检测，采用盲孔法对测试点进行了验证，比较了焊接、旋压等工艺处理的阴极辊表面残余应力分布的差异，指出3种阴极辊表面存在不同的压应力状态，为产品设计提供了重要借鉴。最后为评价振动阴极辊的消应力工艺，采用超声法对阴极辊振动消除残余应力的效果进行了测试与评价。Abstract: With the development of green new energy vehicles, the demand for lithium battery copper foil is increasing. High-quality electrolytic copper foil is rather thin, and its quality is greatly affected by the surface state and internal stress of the cathode roller. In response to the need to improve the quality of copper foil of the domestic lithium battery copper foil integrated machine, the residual stress of its core component cathode roller was ultrasonically tested, the test point was verified by the blind hole method, and the welding, spinning and other process treatments were compared. The difference in the residual stress distribution on the surface of the cathode roll indicates that the three types of cathode rolls have different compressive stress states, which provides an important reference for product design. At the same time, in order to evaluate the stress relief process of the vibrating cathode roller, the ultrasonic method was used to test and evaluate the effect of vibration elimination of the residual stress on the cathode roller.
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Keywords:
- cathode roll /
- residual stress /
- ultrasonic /
- titanium cylinder
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