An online controllable continuous self-resistance heating control method based on multi-sensor fusion

Abstract

The invention discloses an online controllable continuous self-resistance heating control method based on multi-sensor fusion. According to this characteristic information, the host computer preliminarily sets the loading current, roller speed and contact pressure between the first pair of electrode rollers according to the heating target temperature requirements and the yield strength of the billet at a specific temperature. The current is applied in the same direction to complete the first-pass self-resistance heating of the blank; the second-pass self-resistance heating is carried out sequentially; and the invention simultaneously discloses a self-resistance heating control system. In the present invention, the loading current between each pair of electrode rollers, the rotation speed of the electrode rollers and the contact pressure between the electrode rollers and the blank are controllable, and cooperate with the blank visual detection system and the infrared temperature measuring device to form a closed-loop control system, which can complete the process along the length direction of the blank. Precise and controllable heating purpose.

Description

technical field [0001] The invention belongs to the field of heating control of hot stamping special-shaped blanks, in particular to an online controllable continuous self-resistance heating control method based on multi-sensor fusion. Background technique [0002] Hot stamping forming technology is a new forming technology to improve the plastic forming ability of high-strength steel plates, ensure the dimensional accuracy of stamping parts and improve the strength level of stamping parts. It has become a popular technology in the high-strength steel auto parts manufacturing industry. The billet heating of the hot stamping process is heated by a roller hearth furnace. Its main advantage is that it is suitable for uniform heating of blanks of different shapes after laser cutting and blanking. However, it has also been found in the process of use that, due to the limitation of the heating speed, the only way to increase the production efficiency can be achieved by increasing...

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Problems solved by technology

[0006] The purpose of the present invention is to provide an online controllable continuous self-resistance heating control method based on multi-sensor fusion, aiming to solve the problem that there is no fast heating method that can be really effective for the online heating speed of hot stamping special-shaped thin sheets And the temperature field is controllable, resulting in the problem of poor plate shape that is easily induced during the heating process

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