Process and device for heating four corners of rectangular steel pipe

The invention relates to the technical field of square rectangular steel pipe four-corner heating, and discloses a square rectangular steel pipe four-corner heating process and device, the square rectangular steel pipe four-corner heating process comprises a first guide rail, and further comprises two vertical moving assemblies symmetrically arranged on the first guide rail; the two vertical moving assemblies are used for clamping the four corners of the square rectangular steel pipe. The vertical moving assembly is composed of a vertical moving mechanism, a first sliding table and a heating mechanism. The vertical moving mechanism is composed of a second guide rail and a second sliding table. The heating mechanisms are heating sensors, and each heating mechanism is composed of two heating sensors. According to the method, the deformation area is locally heated, rolled and formed, so that a product with a smaller bending radius can be obtained, and more complex high-strength steel workpieces with stricter des