Driving torque amplitude limiting control method of structural steel straightening machine with front and rear clamping rollers

Abstract

The invention discloses a driving torque amplitude limiting control method of a structural steel straightening machine with front and rear clamping rollers. A control program mainly comprises a clamping roller driving motor current torque component calculation unit corresponding to a straightening machine front clamping roller tensile stress torque, a clamping roller driving motor current torque component calculation unit corresponding to a straightening machine rear clamping roller tensile stress torque, a straightening machine driving motor current torque component calculation unit corresponding to structural steel straightening mechanism practical straightening torque and a straightening machine driving motor current torque component serious overload monitoring unit corresponding to structural steel straightening mechanism straightening torque. By the adoption of the technical scheme, driving torque amplitude limiting is achieved for the structural steel straightening machine with the front and rear clamping rollers, production equipment is prevented from being damaged, and safety production of structural steel straightening is ensured.

Description

technical field [0001] The invention belongs to the technical field of metallurgical industry production equipment. Specifically, the present invention relates to a transmission torque limit control method of a section steel straightening machine with front and rear pinch rollers. Background technique [0002] At present, the steel straightening machine of the small H-shaped steel production line is a cantilever ten-roller straightening machine. The 10 straightening rollers are arranged staggered up and down. transmission, while the above five straightening rollers are non-transmission passive rollers. The maximum straightening section modulus of this straightening machine is 220cm3. [0003] For the various H-beams rolled by this production line, since the section modulus is smaller than the maximum straightening section modulus allowed by the straightening machine, the straightening machine can complete various specifications and varieties of the production line without ...

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Problems solved by technology

The direct investment of adding a 10-roller straightening machine with a larger section modulus (including the straightening machine roll cover and roll sheets, etc.) needs about 22 million yuan, while the existing online straightening machine and its roll cover rolls The depreciation loss of accessories such as sheets is about 10 million yuan, and the installation, commissioning and construction of the new straightening machine will take a long time to stop production

[0007] The purpose of adding pinch rollers before and after the section steel straightening machine is to avoid the transmission torque overload of the transmission mechanism of the section steel straightening machine when the large-size section steel is normally straightened. When the straightening torque of the transmission mechanism of the straightening machine is seriously overloaded, in this case, if the section steel straightening machine still makes the section steel in the straightening through its own short-term overload capacity and the push-pull action of the front and rear pinch rollers Straightening in the straightening machine, which will cause damage to the shaft and bearing housing of the straightening roller in the main straightening area of ​​the straightening machine due to excessive vertical shear force

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