Reverse scraping tool and using method thereof

The invention belongs to the technical field of machining, and particularly relates to a deep hole machining reverse scraping tool which comprises a tool bar, a supporting device, a tool bit, a pressing nut, a blade, a tensioning device and a key block. The blade and the tool bit are rigidly connected through the tensioning device, the tool bit is fixed to the tool bar through the compression nut, the supporting device is connected with the tool bar in a nested mode, and the key block is used for limiting movement of the supporting device. The problems that reverse scraping machining quality of large-size deep hole workpieces is unstable, and machining efficiency is low can be effectively solved. 本发明属于机械加工技术领域，尤其涉及一种深孔加工的反刮刀具，一种反刮刀具，所述的刀具包括：刀杆、支撑装置、刀头、压紧螺母、刀片、拉紧装置、键块；所述刀片与刀头通过所述拉紧装置刚性连接，所述刀头通过所述压紧螺母固定在所述刀杆上，所述支撑装置与所述刀杆嵌套连接，所述键块用于限制所述支撑装置的活动，本发明提供的反刮刀具结构，能够有效的解决大尺寸深孔类工件的反刮加工质量不稳定，加工效率低的问题。