Constant-power control system of hot sawing machine

Abstract

The invention discloses a constant-power control system of a hot sawing machine. A power detection circuit is additionally arranged on a main motor control loop, and consists of a voltage transmitter,a current transformer and a current transmitter which are additionally arranged on a main motor power loop; output signals of the voltage transmitter and the current transmitter are transmitted to ananalog quantity input module of the PLC; after a CPU of the PLC collects a transmitted signal, real-time power difference calculation is carried out on the signal and a manually set power value, so that the saw feeding speed of a saw feeding hydraulic cylinder is controlled, and a constant-power control operation mode of the main motor is achieved. The constant-power control system of a hot sawing machine has the beneficial effects that the constant-power control system can enable the main motor of the hot sawing machine to work in a constant-power mode, and in the process of sawing a rolledpiece, if the thickness of the sawn rolled piece is small, the hot sawing machine can automatically increase the sawing speed; and if the thickness of the sawn rolled piece is large, the hot sawing machine can automatically reduce to the normal sawing speed, so that the production efficiency is improved, and the abrasion of the saw blade is reduced.

Description

technical field [0001] The invention relates to an electrical control system of a hot saw machine, in particular to a constant power electrical control system of a hot saw machine. Background technique [0002] The hot saw machine is an important sawing equipment in the steel rolling production line. It is used for cutting the head and tail of the rolled piece rolled by the finishing mill. The main motor of the hot saw machine drives the saw blade to work, which is generally controlled by a soft starter. The sawing action of the hot saw machine is controlled by the hydraulic system. The PLC system is used to control the opening of the proportional valve of the hydraulic system, and then the hydraulic cylinder and the sawing trolley are driven to adjust the sawing speed. The working condition of the hot saw machine is directly related to the rolling speed of the entire production line and the quality of the rolled piece. But, there is certain defective in the electrical con...

AI Technical Summary

Problems solved by technology

But, there is certain defect in the electric control system of existing hot sawing machine

The reason is that many of the products rolled by modern finishing mills are special-shaped parts, which not only have different shapes, but also have uneven thickness and uneven mass distribution on the cross-section.

If the hot saw machine works at a fixed sawing speed, it will cause the load power of different parts to be sawed to change. This phenomenon not only makes the sawing efficiency of the hot saw machine very low, but also is not conducive to the maintenance of the equipment. Stability, but also easy to cause damage to equipment

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