A device and method for improving the precision of special steel bar marshalling and sizing

Abstract

The invention relates to a device for improving the precision of special steel bar grouping and sizing, which includes a sizing frame, a sizing baffle mounted on the sizing frame, a baffle lifting device and a baffle displacement device, the baffle lifts The device includes a lifting hydraulic cylinder and a crank connecting rod. One end of the crank connecting rod is hinged with the piston rod of the lifting hydraulic rod, and the other end is hinged with the baffle plate. Hinged; the baffle plate displacement device includes two push mechanisms, both of which are hinged with the fixed-length baffle, and the push mechanism includes a displacement hydraulic cylinder and a connecting rod, and one end of the connecting rod is connected to the displacement hydraulic cylinder The piston rod is hinged, and the other end is hinged with the fixed-length baffle; both the lifting hydraulic cylinder and the displacement hydraulic cylinder are controlled by a PLC control system. The invention compensates the transverse temperature deviation and the longitudinal temperature deviation of the grouped multiple-length parent materials, and greatly improves the length-setting accuracy of the length-setting machine.

Description

technical field [0001] The invention relates to the technical field of on-line finishing of metallurgical steel rolling, more specifically, it relates to a device and method for improving the precision of grouping and sizing of special steel bars. Background technique [0002] For large and medium-sized bars of special steel, the length of each billet after rolling varies from more than 100 meters to 500 or 600 meters, and the final rolling temperature is generally 900-950°C. The finished billets are cut into 60-110m long base metals by flying shears. The base metals are thrown by the throwing device and then distributed in rows on the cooling bed or traverse device. After air cooling or heat preservation Carry out grouping, and the number of double-foot parent materials in each group ranges from several to dozens of pieces. The grouped double-foot parent materials are sawed or cut by sawing machine or shearing machine, and the sawn or sheared The length of the finished bar...

AI Technical Summary

Problems solved by technology

[0005] When shearing or sawing in the prior art, the position of the fixed-length baffle is fixed. During the cutting process, the length of the double-length parent material shrinks due to the continuous drop in temperature. In addition, the position of the fixed-length baffle is According to the length from the cut-to-size baffle to the sawing or shearing center line plus the preset cold shrinkage, but the preset shrinkage is determined based on the overall shrinkage of the double-size base material and the number of cutting segments, which does not conform to the actual production situation , will cause the length of the finished product after cutting to be uneven after it is completely cooled

Images