Online extrusion molding method of high-strength hot-rolled forklift gantry profile steel

The invention discloses an online extrusion molding method of high-strength hot-rolled forklift gantry profile steel, relates to a molding method in a profile steel rolling process, and mainly aims to solve the problems of surface defects and low product size precision of products rolled by a traditional rolling mill. Firstly, an online extrusion clamping fixture is manufactured, and is provided with a hole shape; a workpiece inlet of the hole shape takes the shape of a horn mouth dispersed peripherally; the online extrusion clamping fixture is locked on a roller way beam in front of a last universal mill outlet of a hot-rolled forklift gantry production line through a fixed bracket, and is connected with a guide plate; the hole shape of the online extrusion clamping fixture and a finished product hole shape of an universal mill are positioned on the same horizontal plane, and are aligned to the guide plate in the outlet; drawing equipment is arranged in front of the online extrusion clamping fixture; a rolle