Rolling process of high-speed wire combined type final forming unit with few stands

Abstract

The invention discloses a high-speed wire rod combined-type few-rack eventually-forming unit and a rolling technology. The high-speed wire rod combined-type few-rack eventually-forming unit comprises a first rolling pass rack, a second rolling pass rack and a third rolling pass rack. The third rolling pass rack comprises three working rollers which are arranged at equal angles of 120 degrees. The elongation rate of a first rolling pass and the elongation rate of a second rolling pass are respectively 1.0-1.4, and the elongation rate of a third rolling pass is 1.0 to 1.2. The overall rolling elongation rate of the three rolling passes is 1.0 to 1.8. Three-roller hole types are adopted on the third rolling pass rack, the three-roller hole types are beneficial to reducing a broadsiding effect and improving the elongation rate of a rolled piece, deformation and temperature rising are reduced due to the fact that the broadsiding effect is reduced, the stress generated inside the rolled piece is beneficial to deformation of the rolled piece, and pressing on the cross section is more even. Meanwhile, the elongation range of the rolled piece in the three-roller hole types is large, and rolling with different standards within a larger range inside the same hole type can be achieved only with the need of appropriately adjusting a roller gap of the hole types. In addition, compared with a traditional unit, the high-speed wire rod combined-type few-rack eventually-forming unit is few in the number of rolling mills and low in equipment investment.

Description

technical field [0001] The invention relates to a rolling process, in particular to a rolling process of high-speed wire rod rolling equipment. Background technique [0002] As one of the important products in the iron and steel industry, wire rod is widely used in construction, machinery and metal products industries. In recent years, production has continued to increase, reaching 25% of China's total steel output in 2012. [0003] As we all know, steel production consumes a lot of energy and has a huge impact on the environment. Under the current increasingly stringent energy and environmental requirements, the contradiction between reducing production energy consumption and improving the performance of steel products is intensifying. [0004] Continuous casting and rolling, hot charging and hot delivery, controlled rolling and controlled cooling can effectively reduce energy consumption, and at the same time, without adding microalloying elements, through production meth...

AI Technical Summary

Problems solved by technology

However, the traditional reducing and sizing technology and equipment have the following disadvantages. The number of rolling mills is large, the engineering investment is large, and the pass system is complex, resulting in complex process technology control systems and production management. The gearbox has many speed ratios and complex mechanical structures. , which further increases the cost of mechanical investment, and the large number of speed ratio gears also brings negative effects of low utilization rate. For example, when producing products within the specification range of Φ5.0mm~Φ25.0mm, the speed ratio may only be used in 256 types more than 10 kinds of

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