Concave-roller type thermal straightening machine supporting roller and manufacturing method thereof

Abstract

The invention discloses a concave-roller type thermal straightening machine supporting roller which comprises a roller body which is a concave curved surface that is matched with a total deformation after contacting a mechanical deformation and coupling with a thermal deformation; and the diameter at the central part of the roller body is minimized, the diameters of end parts at two sides of the roller body are maximized. A manufacturing method of the thermal straightening machine supporting roller comprises the following steps of: building a straightening roller-supporting roller finite element structure model; building a straightening roller-supporting roller thermal-mechanical-contact mechanical model; obtaining inner temperature fields of the straightening roller and the supporting roller according to the surface working temperature, material parameters, and the like; calculating a flat-roller type supporting roller thermal-mechanical coupling deformation and a deformed roller-shape curve; and determining the roller-shape curve of the supporting roller according to the deformed roller-shape curve, and obtaining the concave-roller type thermal straightening machine supporting roller. The invention adopts the concave roller surface which is used for counteracting the convex deformation formed by thermal-mechanism coupling, ensures that the contact pressure is even, reduces the local wearing and deformation amount, prolongs the service life of the supporting roller, and improves the stress state of the straightening roller, thereby improving the thermal straightening quality of a steel plate.

Description

technical field [0001] The invention relates to a support roll for a thermal straightening machine, in particular to a support roll for a concave roll type thermal straightening machine and a manufacturing method thereof. Background technique [0002] The support roll of the straightening roll of the steel plate hot leveling machine is different from the support of the straightening roll of the steel plate cold leveling machine. The support roll of the hot straightening machine not only supports the straightening load transmitted by the straightening roll, but also bears the transmitted heat. Load, therefore, the deformation of the support roll of the thermal straightener includes both contact mechanical deformation and thermal deformation, and it is the coupling of the two deformations. [0003] Hot levelers usually use flat roll type support rolls, see figure 1 The finite element structure model of the straightening roller-supporting roller is shown, wherein, 11 is a stra...

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Problems solved by technology

[0006] In order to overcome defects such as increased wear in the middle part and flattening in the middle due to the convexity deformation formed by the joint action of the contact load and the thermal load in the existing flat-roller type support roll of the thermal straightening machine, the purpose of the present invention is to provide a concave-roller type support roll. The support roll of the straightening machine and its manufacturing method, the support roll of the hot straightening machine adopts a concave roll surface, which is used to offset the convexity deformation formed by the heat-mechanical coupling, avoids the deformation from being too concentrated in the middle, makes the contact pressure uniform, and reduces the local pressure. The degree of wear and local deformation, prolong the service life of the support roll, and improve the stress state of the straightening roll, thereby improving the quality of steel plate thermal straightening

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