Scoring machine for valve machining

The invention relates to the technical field of valve machining equipment, and discloses a scoring machine for valve machining, the scoring machine comprises a workbench, a square groove is formed in the top of the workbench, two swing plates for covering the square groove are rotatably connected to the bottom of the workbench, and a clamping assembly for clamping a valve is mounted at the top of the workbench; the clamping assembly comprises a circular ring rotationally connected with the workbench, an annular plate is fixedly connected to the top of the circular ring, notches are formed in one side of the circular ring and one side of the annular plate, and a plurality of magnetic attraction assemblies are fixedly connected to the top of the workbench; the magnetic attraction assembly comprises a bent rod fixedly connected with the workbench, the top of the bent rod is fixedly connected with a limiting frame, and an electromagnet with one end extending to the outside of the limiting frame is arranged in the