Roll forming method of large and medium structural steel solid disk forging

Abstract

The invention discloses a roll forming method of a large and medium structural steel solid disk forging, which comprises the following steps of: firstly upsetting structural steel bar materials, profiling into a solid disk blank; and rolling the disk blank in a rolling machine. When rolling within 60s, expanding the disk blank at a speed of 5-12mm / s under a 4500-4900KN axial rolling force with an axial feed speed of 1.5mm / s; when rolling in the time range of 60-100s, expanding the disk blank at a speed of 3-10mm / s under a 3000-3900KN axial rolling force with an axial feed speed of 1.2mm / s; and when rolling in the time range of 100-120s, expanding the disk blank at a speed of 2-6mm / s under a 2000-3000KN axial rolling force with an axial feed speed of 0.8mm / s, and finally rolling into the solid disk forging on one-grade fire. The method is mainly used for rolling the disk forging with excellent shape, dimension, organization and performance.

Description

technical field [0001] The invention relates to a rolling forming method of forgings, in particular to a rolling forming method of large and medium-sized structural steel solid disc-shaped forgings. Background technique [0002] Chinese Invention Patent Specification CN1978125A published on June 13, 2007 discloses a rolling forming method for large and medium-sized solid disc-shaped forgings. After the solid disc is heated, it is installed in the machine for positioning and axially rolled into a solid disc-shaped forging. This method only solves the technical problem of rolling forming of large and medium-sized solid disc-shaped forgings. When this method is used to roll large and medium-sized structural steel solid disc forgings, when the upper tapered roller of the rolling mill moves axially towards the disc blank to roll the disc blank, if the feed speed is too high, it will cause the disc blank When the temperature rises during rolling, it is easy to cause defects such...

AI Technical Summary

Problems solved by technology

When this method is used to roll large and medium-sized structural steel solid disc forgings, when the upper tapered roller of the rolling mill moves axially towards the disc blank to roll the disc blank, if the feed speed is too high, it will cause the disc blank When the temperature rises during rolling, it is easy to cause defects such as overheating, overburning, and structural variation; if the feed rate is too small, it will cause the plate to dissipate heat too quickly during rolling, resulting in no rolling, or increased rolling time and rolling times, reduce rolling efficiency, and also cause defects such as insufficient filling of the peripheral part of the ring sharp corner near the outer ring surface of the disk forging

And when adopting this method to roll disc-shaped forgings, it is necessary to make the shape and size of disc-shaped forgings reach the requirements through repeated multi-turn rolling, which not only increases production costs, reduces productivity, but also repeatedly rolls for many times. Process and quality control add difficulty