Heating cutting notch flatness detection device and method for guardrail corner tee joint production

The invention relates to the technical field of flatness detection, and discloses a heating cutting notch flatness detection device and method for guardrail corner tee joint production. The device comprises an operation table, a plane detection automatic material distribution system, a supporting rod, a supporting table and a corner tee joint body. The bottom of the supporting rod is fixedly connected with the top of the operation table, the bottom of the supporting table is movably connected with the top of the supporting rod, and the bottom of the corner tee joint body makes contact with the top of the supporting table; and the problems that an existing detection device mostly conducts cutting face multi-angle measurement, so that the flatness is judged according to a difference value, manual data measurement and judgment are needed, the production capacity is large, certain use cost is increased, equipment for automatically detecting the flatness and judging the quality according to a numerical value range