Chamfering device for combined use

The utility model relates to the technical field of chamfering devices, and discloses a combined chamfering device which comprises a pretreatment tool and a chamfering device, the right side of the pretreatment tool is connected with the left side of the chamfering device, and a first connecting rod is arranged on the right side of the pretreatment tool; a fixing inserting hole matched with the first connecting rod is formed in the chamfering device, the first connecting rod comprises but not limited to a hexagonal prism, a threaded column and a quadrangular column, the chamfering device comprises a connecting pipe and five sets of chamfering blocks, and the chamfering blocks are located on the outer side of the connecting pipe; second mounting holes are formed in the front side and the rear side of each chamfering block and the outer wall of the connecting pipe, a mounting rod is connected to the right side of the chamfering device, the chamfering device comprises the connecting pipe and five sets of chamfer