Method for calibrating zero degree for sectional bar straightening hole pattern

Abstract

The invention relates to the field of sectional bar straightening methods, in particular to a method for calibrating zero degree for a sectional bar straightening hole pattern to achieve the technical purposes that the zero degree making time for sectional bar straightening is shorter and the accuracy degree is higher. The calibration method comprises the following steps that firstly, the axial zero position benchmark is determined; secondly, a laser level meter is positioned; and thirdly, the zero degrees of all straightening rollers are calibrated, wherein a calibration sample plate is perpendicularly attached to hole patterns of all the rollers, and the axial and pressing positions of the rollers are adjusted till a calibration point on the calibration sample plate coincides with an intersection point of a horizontal line of the laser level meter and a plumb line. A method with crossed laser lines as benchmarks is ingeniously utilized, the calibration time can be shortened, the calibration accuracy can be improved, the manual labor intensity is also lowered, and the safety coefficients are increased. The method is especially suitable for a sectional bar straightening hole pattern zero degree calibration process.

Description

technical field [0001] The invention relates to the field of profile straightening methods, in particular to a method for calibrating the zero degree of profile straightening passes. Background technique [0002] In general straightening rolls, the upper roll can be adjusted in the vertical direction and the axial direction, and the lower roll can only be adjusted in the axial direction. The center line of the lower roll is on the same horizontal plane and has the same diameter. When using the sample steel for zero-degree calibration method, such as figure 1 As shown, the upper rolls (2, 4, 6, 8) and the lower rolls (1, 3, 5, 7, 9) of the straightening machine are not on a vertical line. Alignment, then lift the upper roller, the distance between the upper roller and the lower roller is sufficient to ensure that the sample steel can be straightened smoothly. After the sample steel is placed in a suitable position, each straightening roller is pressed down separately. And u...

AI Technical Summary

Problems solved by technology

[0003] Such a calibration method has the following problems: 1. The calibration time is long: during the calibration process, it is necessary to organize the delivery of the sample steel, and the repeated confirmation of the bonding between the sample steel and the straightening roller, resulting in the need to calibrate the zero degree of the profile straightening roller. The time is about 2 hours; 2. The calibration accuracy is poor: the bonding between the sample steel and the straightening roller varies from person to person, and the straightening zero degree made by each person is quite different. The main reason is that the sample steel is affected by the straightening roller. It bends after being pressed, and it cannot be judged manually when the bending degree is small

The accuracy of the calibration of profiles with inclined planes is even worse; 3. High manual labor intensity and low safety factor: During the zero-degree process, lifting and transporting the sample steel, and usually climbing up the straightening machine when observing the gap, resulting in high manual labor intensity. high security risk

Images