Control system for core rod stop trolleys of seamless steel tube continuous rolling mills and control method thereof
A technology of seamless steel pipes and limited-movement trolleys, which is applied in the direction of rolling mill control devices, metal rolling, metal rolling, etc., can solve the problems that the rolling effect cannot be effectively guaranteed, the acceleration and deceleration time cannot be achieved, and the operation is stable and the failure low rate effect
Inactive Publication Date: 2017-05-24
TIANJIN RES INST OF ELECTRIC SCI
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Problems solved by technology
The control method using a DC motor and a single drive motor cannot achieve the required acceleration and deceleration time due to limitations such as the moment of inertia, and cannot effectively guarantee the rolling effect
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[0020] The present invention will be further described in detail below in conjunction with the accompanying drawings and through specific embodiments. The following embodiments are only descriptive, not restrictive, and cannot limit the protection scope of the present invention.
[0021] A control system for a mandrel limit trolley in a continuous rolling mill of seamless steel pipes, such as figure 1 As shown, the control system of the limiter trolley includes limiter rack 2, support pulley 3 and transmission gear 1. The limiter rack has a length of 25.6m and a weight of 40t. The middle part of the limiter rack is evenly spaced with multiple supports The pulley, the supporting pulley is installed on the rolling line for limit sliding; the front end 4 of the rack is equipped with a mandrel, and the tail end of the rack is equipped with clamping claws, which can quickly clamp and loosen the mandrel;
[0022] The upper and lower sides of the stop rack are continuous tooth-shaped...
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The invention relates to a control system for core rod stop trolleys of seamless steel tube continuous rolling mills. The control system comprises a stop rack, a plurality of supporting sliding wheels and transmission gears. The multiple supporting sliding wheels are installed in the transverse direction of the middle of the stop rack at intervals in a uniform distribution mode. The supporting sliding wheels are installed on a rolling line in a stop sliding mode. The upper side and the lower side of the stop rack are both of a continuous tooth-profile structure. Two transmission gears are arranged at the upper side and the lower side of the stop rack in a spaced mode. Each transmission gear is provided with a motor for driving. Each motor is connected with an invertion device. Each invertion device is connected with a rectification / feedback device in series. The rectification / feedback devices are connected with a main circuit through rectifier transformers. The four motors achieve parallel drive. According to the control system, by the adoption of the master-slave control mode, torque balance distribution of the four motors is guaranteed, the core rod stop control system is stable to operate and low in failure rate, the fastest production cycle reaches 30s, the daily output exceeds 2000 tons at most, and an expected control effect is achieved.
Description
technical field [0001] The invention belongs to the technical field of electricity and automation, in particular to a control system and a control method for a mandrel stop trolley of a seamless steel tube continuous rolling mill. Background technique [0002] Seamless steel pipe hot rolling mills can be divided into full-floating mandrel rolling mills (MM), semi-floating mandrel rolling mills (Neuval) and limited-movement mandrel rolling mills ( MPM) three types. The application of the limited mandrel rolling mill reduces the equipment cost, overcomes the limitation of the mandrel length and weight, improves the quality of the steel pipe, and significantly increases the diameter and length of the produced steel pipe. [0003] The limited mandrel is that the mandrel runs at a limited speed during rolling. In each rolling cycle, there is a cycle of mandrel speed change, that is, the speed system of the mandrel. The general principles are: high-speed rod penetration, high-sp...
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IPC IPC(8): B21B25/02B21B37/78
Inventor 鹿洪伟赵春晓吕金阎占文
Owner TIANJIN RES INST OF ELECTRIC SCI