Process control method of maximum accelerating time of starting hotly-rolled type steel flying shear motor

Abstract

The invention discloses a process control method of maximum accelerating time of starting a hotly-rolled type steel flying shear motor and belongs to the technical field of a metallurgy process. The process control method comprises the following steps of: setting relative parameters of all parts of the hotly-rolled type steel flying shear motor, calculating a coordinate value of a tail end point of an upper shearing blade in a coordinate system xoy, calculating an initial shearing angle, calculating an initial stopping position angle, solving a motor rotary speed corresponding to the initial shearing angle, and obtaining maximum acceleration time of starting the motor and an actual accelerated speed of starting the motor. The process control method disclosed by the invention is a beneficial design supplement of the design of a flying shear connecting rod mechanism, can really reflect a principle of a flying shear mechanism design, and provides powerful theoretical support for accurately controlling a flying shear; the process control method completely gets rid of a lot of uncertain limitations caused by geometric constructions, is good for better understanding the working property of the flying shear, and has the advantages of good commonality and adaptability, fast speed, high calculation precision and the like, so that corresponding computation software is formed; and the process control method is convenient and fast and is worthy of popularization and extension.

Description

technical field [0001] The invention belongs to the technical field of metallurgical technology, and in particular relates to a process control method for starting the maximum acceleration time of a hot-rolled section steel flying shear motor. Background technique [0002] Flying shear is one of the important equipment in the steel rolling production line. It is arranged in front of the finishing rolling unit. It is used for cutting and breaking the head and tail of the rolled material during the hot rolling of section steel. It also has the function of segmentation to prepare for further rolling. , the quality of its working performance directly affects the production efficiency of the rolling line and the quality of the product cut. With the development of continuous rolling mills, flying shears have been used more and more widely. [0003] The structure of the existing hot-rolled flying shear transmission system is as follows: figure 1 As shown, two main drive motors 1 ...

AI Technical Summary

Problems solved by technology

However, due to the complexity of the hot-rolled section steel flying shear structure, it is difficult to obtain some of its own kinematics characteristics accurately. For example, the moment of inertia of the system changes with the crank angle, and it is difficult to solve it through the formula

The difficulty of determining these parameters also makes it difficult to implement the method of directly using the system moment of inertia to calibrate the main drive motor

In actual engineering design, in order to catch up with the construction period or save a lot of calculation troubles, the designers use the analogy method to estimate the main drive motor of the flying shear system based on the existing drawings, which will easily lead to problems in hot rolling production. There is a large difference between the horizontal speed of the cutting edge and the running speed of the rolled steel section when the flying shears start cutting, and it is difficult to achieve precise control according to the production process on site, which may affect the shearing effect of the flying shears and the section quality of the section steel. It may also affect productivity

Images