Cutting knife, device and method for manufacturing dumbbell sample for cable detection

The invention provides a cutting knife, device and method for manufacturing a dumbbell sample for cable detection. The cutting knife comprises a first pressing device, a second pressing device and a blade. A dumbbell-shaped space is formed between the first pressing device and the second pressing device. The blade is arranged in the dumbbell-shaped space, and the two sides of the blade are connected with the first pressing device and the second pressing device through sliding mechanisms respectively. Automatic manufacturing of the dumbbell sample of a cable insulating layer can be achieved, and the problem of pressurization deformation happening during cutting of the cable insulating layer is avoided through the pressing devices. 本公开提出了一种线缆检测用哑铃试样制作裁刀、装置及方法，包括第一压紧装置、第二压紧装置和刀片；所述第一压紧装置和所述第二压紧装置之间形成哑铃状空间；所述刀片设置在所述哑铃状空间内，所述刀片两侧分别与所述第一压紧装置和所述第二压紧装置通过滑动机构连接；本公开可实现线缆绝缘层哑铃试样的自动化制作，并且通过压紧装置避免了线缆绝缘层裁剪时加压变形的问题。