Simple tunnel steel arch frame and connecting plate welding machining positioning device

The utility model discloses a simple positioning device for welding and processing a tunnel steel arch and a connecting plate. The simple positioning device comprises a left positioning plate and a right positioning plate, the left positioning plate and the right positioning plate are arranged in parallel, and an adjusting connecting plate capable of adjusting the distance between the left positioning plate and the right positioning plate is connected between the left positioning plate and the right positioning plate; the front end of the left positioning plate and the front end of the right positioning plate are each provided with a positioning bolt with the mounting position capable of being adjusted up and down, and the mounting positions of the positioning bolts are matched with the positions of reserved bolt holes of the connecting plate. By applying the simple positioning device for welding the tunnel steel arch and the connecting plate, the welding efficiency and precision of the I-shaped steel and the