Temperature-controlled rolling equipment for production of metal plate in coils

Abstract

The invention relates to temperature-controlled rolling equipment for production of metal thin ribbons and ultra-thin strips in coils.The temperature-controlled rolling equipment is arranged in the bilaterally symmetrical mode. The position where a working roll (15) is used for rolling strips is a rolling mill gap (20). Inlet and outlet side parts comprise measuring tension rolls (13, 17), steering rolls (12, 18), and recoiling machines (11, 19). All parts are sequentially arrayed with the rolling mill gap as the center from the inside to the outside. The equipment further comprises an uncoiling and heating device (21), a plate strip heat-compensating device (24) and a plate strip edge heating device (25) before ingress of the rolling mill gap, a roll surface heating device (26), and a roll core cooling and bearing seat cooling mechanism (3), a plate strip edge heating device (35) and the plate strip heat-compensating device (34) after egress of the rolling mill gap, a pre-coiling heating device (31), heating devices (22, 32) at positions of the steering rolls and heating devices (23, 33) at positions of the measuring tension rolls at the inlet side.

Description

technical field [0001] The invention relates to the technical field of plate coil rolling production and equipment, in particular to a temperature-controlled rolling production equipment for coiled metal thin strips and ultra-thin strips. Background technique [0002] The development of lightweight technologies in the fields of aerospace, automobiles and rail transit has continuously increased the demand for metal materials other than traditional steel, especially thin strips and ultra-thin strips of metal materials such as aluminum alloys, titanium alloys, magnesium alloys, and high-silicon steels. increase. However, due to the characteristics of the organization and crystal structure of these materials, the required rolling process and equipment are very different from traditional steel materials. Precisely controlling the temperature of uncoiling and coiling and rolling deformation zone (that is, controlling the temperature of rolled piece and roll) is the key to obtain ...

AI Technical Summary

Problems solved by technology

Because if the surface temperature of the roll is not controlled, the temperature in the rolling deformation zone will be out of control, and the real temperature-controlled rolling cannot be realized.

(3) Cooling of the roll core and roll chocks to protect mechanical equipment; from a mechanical point of view, when the roll surface is artificially heated, due to the existence of heat conduction, the roll core, roll neck, and bearings in contact with it Both the bearing seat and the bearing seat will inevitably follow the temperature rise until it exceeds the allowable range of the machine: after exceeding 80°C, the lubricating grease in the bearing seat will liquefy and fail; the roll crown formed after the thermal expansion of the roll reaches a certain level will affect the thickness accuracy of the rolled piece , the bearing seat may be stuck in the rolling mill archway after being heated and expanded, resulting in failure of the hydraulic AGC, etc.

The disadvantages of this method are: low energy utilization rate; continuous temperature control of the rolls during the rolling process cannot be guaranteed; low efficiency, rolling must be stopped every once in a while to reheat the roll surface; it is difficult to uniformly control Temperature distribution in the width direction of the roll surface

In addition, due to the low ignition point of materials such as magnesium alloys, this combustion heating method has certain dangers in practical industrial applications.

Another simple method is to roll several other high-temperature metal materials first, heat the roller table and the surface of the rollers, and then carry out rolling. system, unable to meet the requirements of refined temperature control production

The above two roll heating methods cannot realize precise control of the roll temperature, so neither is temperature-controlled rolling in the true sense.

[0011] Chinese patent 200510086721.X discloses a roll core heating device for warm rolling of magnesium alloy strips. This patent proposes a method of heating the roll from the core of the roll from the inside to the outside. Although the roll heating function is realized, there are several problems. Insufficient points: slow temperature rise, inaccurate temperature control, no consideration of the temperature gradient in the belt width direction (roll length direction), no consideration of the cooling of the roll and bearing housing

Chinese patent 2011100661204.1 "A device and method for hot rolling and warm rolling of metal sheet and strip" and its similar Chinese patent 201110349952.0 "A device and method for hot rolling and warm rolling metal The method of wrapping the metal pipe frame in the circumferential direction and electrifying it realizes the online heating of the roll by induction heating, but this method has several shortcomings: (1) It does not consider the temperature uniformity and temperature uniformity of the roll surface along the width direction of the roll. Temperature gradient control; (2) The cooling of the roll and bearing seat is not considered; (3) Its heating element occupies most of the space in the circumferential direction of the roll, hindering the use of other mechanical components and online instruments; (4) In this method The rolling process is not heated in advance, but warm rolling is achieved by accepting the heat transfer from the rolls

Steckel rolling mill is an existing technology. Its integrally heated in-furnace hot coiler can solve the problem that magnesium coils cannot be uncoiled at room temperature, but it cannot solve the other problems that must be solved in the above-mentioned coil temperature-controlled rolling. Problem; and the heat capacity of the coiler in the furnace is large, the temperature in the furnace is difficult to control, the coiling temperature is low, the coiling temperature of the finished product is not easy to control, and the temperature gradient control in the strip direction cannot be realized

[0013] To sum up, the existing patents only partially solve the technical problems related to single-sheet warm rolling, and there is no single-sheet metal strip warm rolling mill that comprehensively solves all key technical problems of single-sheet metal strip rolling, let alone a single-sheet metal strip warm rolling mill. There is a plan that can fully consider all the technologies to be solved by metal coil rolling, especially there is no plan for high-silicon steel, aluminum, titanium, magnesium and other emerging metal material coils. Technology and equipment for temperature-controlled rolling of magnesium and other metal strips

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