Control method for start and stop mode outlet shears of continuous annealing unit
A technology of unit start-stop and control method, which is applied to the attachment of shearing machines, shearing devices, manufacturing tools, etc., can solve the problem of not considering the fluctuation of gas source pressure or flow, and not considering the change of steel width and thickness specifications, It is not allowed to reduce the speed of the strip steel in the annealing furnace, so as to achieve the effect of increasing the yield, prolonging the life of the cutting edge, and smoothing the shearing fracture
Active Publication Date: 2016-06-01
WISDRI WUHAN AUTOMATION
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Problems solved by technology
In the traditional control method, the energization time of the solenoid valve of the clutch brake is generally 200-400 milliseconds, which is a fixed value, and the influence of the fluctuation of the air source pressure or flow is not considered.
In addition, the specification change of steel width and thickness is not considered.
These factors may affect the control accuracy, resulting in the outlet shears in the 8 consecutive shearing process, the shearing angle is not within the control range, the position of the shearing edge is higher than the horizontal line that allows the strip to pass, a steel jam accident occurs, and the exit is interrupted Continuous operation of segments
According to the process requirements, the continuous annealing unit does not allow the strip steel in the annealing furnace to slow down. Once a steel jam occurs in the export shear, it may cause all the silicon steel in the furnace to become waste products, causing huge losses.
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[0030] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the embodiments and accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0031] A method for controlling the start-stop outlet shear of a silicon steel continuous annealing unit, such as figure 1 shown, including the following steps:
[0032] 1) Define the zero-degree position of the exit shear, measure and record the limit angle of the non-jamming steel of the exit shear, as figure 2 As shown, define the direction at 6 o'clock as 0 degrees, the direction at 3 o'clock as 90 degrees, the direction at 12 o'clock as 180 degrees, and the direction at 9 o'clock as 270 degrees. There will be no steel jamming when the blade is between 300°-360° or 0°-60°;
[0033] 2) In t...
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The invention discloses a control method for start and stop mode outlet shears of a continuous annealing unit. Corresponding workspaces are searched according to the thickness and width of current strip steel and the current angle of the outlet shears; and the power-on time of a pneumatic clutch brake electromagnetic valve is controlled. According to the control method, the influence of the specifications of the strip steel and air source variation in a factory on an angular deviation controller is comprehensively considered; steel blocking accidents in the shearing process of the outlet shears are reduced; the yield of the unit is improved; the shearing quality of strip heads and strip tails is improved; the action range of the outlet shears is reduced; the service life of equipment is prolonged; and meanwhile the labor intensity of operators is lightened.
Description
technical field [0001] The invention relates to the field of metallurgical automatic electrical control, in particular to a method for controlling a start-stop outlet shear of a silicon steel continuous annealing unit. Background technique [0002] In recent years, due to the national macro policy and the extensive development of iron and steel enterprises, the production capacity of low-end steel products in my country has been severely overcapacitated, but there is still a large gap in high-strength automotive sheets and oriented silicon steel with higher profit margins in the entire industry. High-end products Most of them need to be imported, and the development of the industry is facing difficulties. Under such circumstances, some large domestic steel mills have introduced technology one after another and launched cold-rolled silicon steel projects. The field of silicon steel is a relatively important direction for the current development of steel mills. [0003] The co...
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IPC IPC(8): B23D33/00
CPCB23D33/00
Inventor 于洪帅张春松王胜勇卢家斌邵国强付聪
Owner WISDRI WUHAN AUTOMATION