Self-adaption control method of shear edge position of crank shaft flywheel shear in cold-rolling continuous processing line

Abstract

The invention provides a self-adaption control method of a shear edge position of a crank shaft flywheel shear in a cold-rolling continuous processing line. The self-adaption control method comprises the following steps: mounting an absolute value encoder on a crank shaft bearing of the crank shaft flywheel shear; after a crank shaft is initially calibrated, starting the crank shaft flywheel shear to work, using one point on a rotation face of the crank shaft as a fixing point, and determining angle information of the fixing point in an initializing process; recording a quantity of accumulated pulses of the absolute value encoder when each shearing process is completed, and calculating the angle information of the fixing point on the rotation face of the crank shaft at present; and comparing the angle information of the fixing point when each shearing process is completed with the angle information of the fixing point in the initializing process, adjusting an electric time length parameter of a pneumatic electromagnetic valve, and controlling clutch combination time and brake turn-on time in the next shearing process. The self-adaption control method provided by the invention can reduce non-normal parking fault rate of an assembly line, caused by the crank shaft flywheel shear, improves the production efficiency of the assembly line, and reduces the maintenance frequency and the maintenance debugging workload of the crank shaft flywheel shear.

Description

technical field [0001] The invention relates to the field of cold-rolling continuous processing lines, in particular to an adaptive control method for the position of the crankshaft flywheel shears of the cold-rolling continuous processing line. Background technique [0002] The process of the cold-rolling continuous processing line unit is generally that the raw material coil is first uncoiled at the entrance section, welded with the forward strip steel by a welding machine, and then enters the process section for processing. Rolled into a finished roll by a coiler. [0003] In order to increase the unit production capacity of the processing line and ensure the working stability of the continuous processing line, two coilers in the upper and lower passages are usually installed at the exit section of the processing line to shorten the conversion time of the processing line, enhance the continuity of operations, and improve the utilization of mechanical equipment efficiency...

AI Technical Summary

Problems solved by technology

However, in the actual working process of the crankshaft flywheel shears, it is often found that under the effect of the pre-adjusted pneumatic solenoid valve energization time, the crankshaft rotation angle and the height of the cutting blade gradually deviate from the original position, and gradually enlarge, eventually causing the position of the cutting blade to be higher than the original position. There are too many passing steel surfaces, blocking the normal progress of the strip steel, causing steel jamming faults at the exit section, and causing abnormal shutdown of the production line

After analysis, it is found that this situation usually occurs due to changes in the working conditions of mechanical equipment that match the power-on time of the pneumatic solenoid valve, which makes the power-on time of the pneumatic solenoid valve unable to adapt to it under new conditions.

For example: 1. After the crankshaft flywheel shears for a certain period of time, the brake spring fatigues and ages, resulting in longer braking time, and the weakened braking torque cannot return the crankshaft angle to the zero position; 2. After replacing the flywheel belt parts, the torque of the new and old belt flywheel There are differences, which lead to inconsistent strokes of the crankshaft and deviations in the angular position of the crankshaft within the same clutch engagement time; 3. After the glycerin lubrication of the crankshaft bearing is insufficient or after a new lubricant is replaced, the frictional braking torque of the crankshaft changes. Inside, the stroke of the crankshaft changes accordingly, and the angle of the final stop position of the crankshaft changes accordingly

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