Method for dynamic adjustment of radial expansion force of uncoiler

Abstract

The invention provides a method for dynamic adjustment of radial expansion force of an uncoiler. According to the method for dynamic adjustment of the radial expansion force of the uncoiler, a data curve of the radial expansion force, the coiling diameter and the unit tension is formed according to traditional strip steel coiling diameter parameters and traditional unit tension parameters, and a PLC control program is compiled; pressure adjustment is carried out by a primary computer with a pressure adjustment critical point which is formed when the rolling diameter is decreased to 750mm; a proportional decompression valve is arranged in a decompression circuit of a coiling block expanding and contracting hydraulic system of the uncoiler, remote pressure control is carried out on the proportional decompression valve by means of expansion force parameters of the primary computer and the control program in a PLC unit, and closed-loop adjustment and real-time control are achieved by the proportional decompression valve and a pressure sensor. According to the method for dynamic adjustment of the radial expansion force of the uncoiler, the expansion force is controlled by means of the proportional decompression valve, the radial expansion force can change dynamically along with the change of the outer diameter of a steel coil, a system can operate stably, pressure adjustment can fully meet design requirements, scratches on the surface of strip steel can be effectively reduced, and the quality and percent of pass of products are improved.

Description

technical field [0001] The invention belongs to the field of steel rolling technology, and in particular relates to a dynamic adjustment method for the diameter expansion force of a cold rolling uncoiler. Background technique [0002] In the smoothing process of the cold-rolled strip production process, the uncoiler is one of the important equipment in the production process. Through the operation of reducing and expanding the diameter of the reel of the uncoiler, the unwinding and feeding of the steel coil and the flattening of the strip are realized. The expansion and contraction of the reel is driven by the expansion and contraction hydraulic cylinder to drive the shaft sleeve to move back and forth axially, and the fan-shaped plate is moved along the diameter through the inclined surface of the pyramid sleeve. To move, so as to realize the expansion and contraction of the reel. The diameter expanding force of the uncoiler is controlled by the manual pressure reducing va...

AI Technical Summary

Problems solved by technology

Since the tension force of the uncoiler is controlled by the manual pressure reducing valve at present, it cannot change continuously with parameters such as the diameter of the steel coil, mechanical failures such as tie rod breakage are prone to occur during the production process, and a large number of strip steel quality defects are generated, which restricts the quality of the product. Yield

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