Method and device for controlling flatness of steel material

Abstract

The invention discloses a method and a device for controlling the planeness of a steel material. The method comprises: a rotary coder connected with a linear displacement servo motor is used for measuring actual linear displacement amount of a press wheel; the rotary coder connected with a corner servo motor is used for measuring the actual corner of the press wheel; a transducer inside the rotary coder converts a measured signal into a TTL square wave pulse and sends the TTL square wave pulse to a counting card; the linear displacement and the corner are worked out through a computation program; the control quantity of the displacement and the corner is converted to voltage value through an analog quantity output card; and the voltage value is sent to a servo motor so that the center of the press wheel and the center of a steel material ventral shield are superposed to realize follow-up control of the press wheel. The device comprises the linear displacement servo motor, the corner servo motor, a screw rod, a supporting roller, the press wheel and a nut; the screw rod is linked with the linear displacement servo motor; and a press wheel bracket is provided with a guide shaft, a press oil cylinder, a base connecting rack, the press wheel, the corner servo motor, and the supporting roller which are linked with the press wheel bracket. The method and the device have the characteristics of high measuring precision, and the like.

Description

technical field [0001] The invention relates to a technology for controlling the flatness of steel materials, in particular to a method and device for controlling the flatness of steel materials which can prevent distortion and deformation of steel materials and avoid jamming. Background technique [0002] The steel material heating bending forming machine tool is a common machine tool used in the processing of hull ribs. This kind of machine tool adopts the principle of medium frequency induction to heat the steel material, and adopts the hydraulic servo system to control the bending radius of the steel material. After the steel material is heated by intermediate frequency, the plasticity increases, and the heated steel material is pressed into an arc-shaped steel material with the required curvature by the pressing wheel. However, since there are more than a dozen types of steel materials, after heating and bending deformation of different types of steel materials, due to...

AI Technical Summary

Problems solved by technology

The previous method is to rely on the pressure wheel that cannot adjust the position to press the steel material in progress to prevent the deformation of the steel material. The disadvantage of this method is that the pressure wheel and the supporting wheel have poor followability, and they are stuck under the action of huge friction. Phenomenon, which seriously affects the production process; and because the stress point of the pressure wheel and the steel material changes with the bending radius of the steel material, the steel material will be distorted and deformed due to uneven force

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