Rolling device for preparing high-toughness high-formability magnesium alloy sheet strip coil

Abstract

The invention relates to a rolling device for preparing a high-toughness high-formability magnesium alloy sheet strip coil and belongs to the field of metal material rolling. The rolling device provided by the invention comprises a rolling machine, an uncoiling machine, a left-right recoiling machine, a front online heating insulating device of the roll machine, a rear online heating insulating device of the roll machine, a straightening machine, a bending rectifying machine, a thickness measuring device, a steering tension roll, a guide roll, a roller heating and lubricating device and the like. In the invention, an online continuous heating device and an advanced PLC (programmable logic control) feedback control system are adopted, and continuous temperature control rolling on the magnesium alloy strip coil is realized. The rolling device provided by the invention has the advantages of uniform heating temperature, high heating efficiency and high temperature control accuracy, and high-quality thin wrought magnesium alloy strip coils are efficiently produced by virtue of a roller preheating insulating system, a technical lubricating system, a strip shape control system and a tension straightening device, thus the geometric quality and structure properties of rolled metal can meet operating requirements.

Description

technical field [0001] The invention relates to rolling forming of magnesium alloys, in particular to a thin coil rolling device for magnesium alloy coil billets. Background technique [0002] Magnesium alloy sheet coil rolling deformation belongs to the magnesium alloy deep processing industry, and is a new material industry supported by the state and an encouraged development project. High-performance rolled magnesium alloy strip is the main material for direct production or forming into precision structural parts with multiple functions such as conductivity, heat dissipation, shock absorption, noise prevention, energy saving, and light weight. It is mainly used for the production of electronic information products (such as computers, communications, consumer electronics, etc.) casings, automotive electronic casings, frames, instrument panels, home appliances, and military products, etc. Compared with the currently commonly used magnesium alloy extrusion and die-casting ...

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Problems solved by technology

[0010] The present invention solves the problem that the allowable deformation temperature range of the magnesium alloy sheet coil is small during rolling, and the temperature drop becomes faster and faster as the coil thins, so that sufficient rolling temperature cannot be guaranteed, and hot / warm rolling and thin strip rolling cannot be continuously performed. The shape and thickness precision of the coil is difficult to control. By installing on-line heating and heat preservation devices on the roller tables on both sides of the entrance and exit of the rolling mill, the required uniform deformation temperature is always maintained when the magnesium alloy thin strip coil is rolled; Coil production is realized through the micro-tension control of the front and rear coilers of the rolling mill; the unit also uses a roll constant temperature heating device to keep the roll temperature and roll shape stable; due to the high sensitivity of the cold hardening of magnesium alloys, the coercive force is high, It is difficult to level at low temperature. The present invention adopts warm straightening and warm stretching and bending devices before and after the coiler respectively, and realizes good plate shape through tension control; control to ensure the thickness accuracy of the thin strip; the rolling mill adopts the asynchronous rolling technology with separate drive of the work roll, which is beneficial to the deformation and thinning of the magnesium alloy and the grain refinement, and improves the microstructure and performance of the strip; the unit also adopts a proprietary lubrication technology to improve The surface quality of the strip; so as to realize the rolling production process of the high-strength, high-formability magnesium alloy sheet coil with good shape, thickness, surface quality and organizational properties of the 0.2mm coil, to meet the mass production and expansion of magnesium alloy application requirements

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