CN201900244U - Roll gap calibrating system for square billet continuous casting withdrawing and straightening machine - Google Patents

Abstract

The utility model relates to the field of continuous casting, and provides a roll gap calibration system for billet continuous casting tension leveling machines, at least one of the chain links of dummy rods is a standard chain link, and the standard chain link The top surface and the bottom surface are parallel planes, and the thickness of the standard chain link between the bottom surface and the top surface is consistent with the standard roll gap width; there are position sensors corresponding to each tension leveling roll, and the position of each tension leveling roll The sensors are respectively connected with the reduction control system of the stretching and straightening rollers. The compensation value of the straightening roller sensor at the standard roll gap width is obtained through the standard chain link, and the reduction amount control system of the straightening roller controls the position of the straightening roller, that is, the width of the roll gap, according to the detection value and compensation value of the straightening roller sensor , high control precision, high degree of automation, good reliability, and can meet the requirements of implementation under light pressure. It is suitable for all kinds of continuous casting production lines, especially the continuous casting production lines implementing soft reduction.

Description

Roll Gap Calibration System for Billet Continuous Casting and Straightening Machine

technical field

The utility model relates to the field of continuous casting, in particular to a roll gap calibration system for billet continuous casting drawing and straightening machines.

Background technique

When billet continuous casting starts, the billet needs to be drawn by dummy head and dummy bar. Specifically, before pouring, the dummy head and the dummy rod are sent in through the dummy feeding mechanism, and the dummy head blocks the lower opening of the crystallizer, so that the cast molten steel has enough time to solidify to form a billet head; the dummy head The rod is located on the roller table. After the billet head is formed, the dummy head is pulled by the dummy rod, and the billet is continuously pulled out from the crystallizer until the billet is bitten by the drawing and leveling machine. The dummy bar is usually a one-way curved chain structure composed of chain links connected end to end.

In addition, in the existing continuous casting of billet, it is generally necessary to implement soft reduction, and the soft reduction function must be well implemented on the casting machine with soft reduction. In addition to the relevant equipment being in good condition and the model calculation correct, the roll gap value Accurate detection and calibration also play a very important role. Generally, the detection of the roll gap value is directly or indirectly detected by manual vernier calipers or micrometers. In this way, the test results have a large deviation in the roll gap value of each tension leveling machine, and often the roll gap value deviation is greater than 0.5mm. , The reduction amount of each tension leveling machine is generally not more than 2 mm, so, due to the large deviation of the roll gap value of the tension leveler, the light reduction function cannot be fully exerted, which affects the quality of the cast slab.

Utility model content

The technical problem to be solved by the utility model is to provide a roll gap calibration system for billet continuous casting stretching and straightening machines with high control precision and meeting the requirements of soft reduction.

The technical solution adopted by the utility model to solve the technical problem is: the roll gap calibration system used for the billet continuous casting stretch leveler, including the dummy bar composed of chain links, the dummy feeding mechanism and the dummy feeding control system, The tension leveling roll reduction control system of the tension leveling machine, the end of the dummy bar close to the dummy head is the head and the other end is the tail, and at least one of the chain links of the dummy bar is a standard chain The top surface and bottom surface of the standard chain link are parallel planes, and the thickness of the standard chain link between the bottom surface and the top surface is consistent with the standard roll gap width; The position sensor, the position sensor of each tensioning and straightening roller is respectively connected with the reduction amount control system of the tensioning and straightening roller.

Each chain link at the head of the dummy bar includes a standard link, which is provided with a tracking and positioning system for the dummy bar, and the tracking and positioning system is respectively connected with the control system for the reduction of the drawing and straightening rollers and the control system for feeding the dummy .

The surface roughness of the bottom surface and the top surface of the standard chain link both reach 0.1 grade, and the thickness deviation between them is less than 0.1mm.

The dummy bar tracking and positioning system includes a positioning chain link and a video positioning system. Positioning marks are arranged on the opposite side of the positioning chain link and the video positioning system. The control system is connected with the dummy ingot delivery control system.

The video positioning system is an infrared sizing system.

The positioning marks are reflective surfaces.

The beneficial effects of the utility model are: before the continuous casting of the billet, the roll gap calibration system of the utility model is used to calibrate the tension and straightening rolls that need to be calibrated. Specifically, the tension and straightening rolls that need calibration are first selected. Numbering, start the roll gap calibration system of the utility model, load the dummy bar and send the standard chain link to the position of the tensioning and straightening roll that needs to be calibrated, and the tensioning and leveling roll is respectively connected to the standard chain link through the tensioning and leveling roll reduction control system. The top surface and the bottom surface are in contact, and then the compensation value is formed by comparing the detection value of the tension leveling roller position sensor with the thickness of the standard chain link, and finally through the tension leveling roller reduction amount control system according to the detection value and compensation value The position of the tensioning and straightening rollers, that is, the width of the roll gap, is controlled, so the control precision is high, the degree of automation is high, and the reliability is good, which can meet the requirements for implementation under light reduction. The standard chain link requires high precision, so the production cost is high. In order to reduce the cost, only one standard chain link is set. In order to ensure the tracking and positioning of the standard chain link, a tracking and positioning system is set up.

Description of drawings

Fig. 1 is a schematic layout of the utility model;

Fig. 2 is the structural representation of standard chain link of the present utility model;

Fig. 3 is a structural schematic diagram of the positioning chain link of the utility model.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

As shown in Fig. 1, Fig. 2 and Fig. 3, the roll gap calibration system for billet continuous casting and straightening machine of the present invention includes a dummy rod 1 composed of chain links, a dummy feeding mechanism and a dummy feeding mechanism. control system, the reduction amount control system of the tension leveling roller 2 of the tension leveler, the end of the dummy bar 1 close to the dummy head 14 is the head and the other end is the tail, and each chain link of the dummy bar 1 At least one chain link is a standard chain link 12, the top surface 12a and the bottom surface 12b of the standard chain link 12 are mutually parallel planes, and the thickness of the standard chain link 12 between the bottom surface 12b and the top surface 12a is consistent with the standard roll gap width ; There are position sensors corresponding to each of the pulling and straightening rolls 2 respectively, and each of the pulling and straightening roll position sensors are respectively connected with the reduction amount control system of the pulling and straightening rolls.

Before billet continuous casting starts pouring, through the roll gap calibration system of the utility model, the roll gap calibration is performed on the tensioning and straightening rolls that need to be calibrated. Specifically, first select the number 2 of the tensioning and leveling rolls that need to be calibrated, and start the utility model. Roll gap calibration system, load the dummy bar 1 and send the standard chain link 12 to the position of the tensioning and straightening roller 2 that needs to be calibrated, and the tensioning and straightening roller 2 is respectively aligned with the top surface of the standard chain link 12 through the tensioning and straightening roller reduction control system 12a and the bottom surface 12b are in contact, and then the compensation value is formed by comparing the detection value of the tension leveling roller position sensor with the thickness of the standard chain link 12, and finally through the tension leveling roller reduction amount control system according to the detection value and compensation of the tension levelening roller position sensor The value controls the position of the tension leveling roller 2, that is, the width of the roll gap, so the control precision is high, the degree of automation is high, and the reliability is good, which can meet the requirements for implementation under light reduction. The so-called standard roll gap width is also a certain roll gap width set in the system to obtain the compensation value. For the convenience of calculation, it is best to set the standard roll gap width as the value when the detection value of the tension leveling roll position sensor is zero. Gap width.

All the dummy bar 1 chain links can be set as standard chain links 12, but the standard chain links 12 require high precision, so the production cost is high. In order to reduce the cost, each chain link at the head of the dummy bar 1 includes One standard chain link 12 is provided with a dummy bar tracking and positioning system, and the tracking and positioning system is respectively connected with the drawing and straightening roll reduction control system and the dummy feeding control system. Through the coordination and cooperation between the tracking and positioning system, the reduction amount control system of the pulling and straightening rollers, and the dummy feeding control system, the compensation amount of each pulling and straightening roller 2 can be obtained one by one. The purpose of setting the standard chain link 12 at the head of the dummy bar 1 is to ensure that the standard chain link 12 can pass through all the straightening rollers 2 , thereby ensuring the compensation for all the straightening rollers 2 . Specifically, in the example shown in the figure, a total of twenty-two chain links are included, and the standard chain link 12 is the sixth section of the head.

In order to control the production cost of the standard chain link while ensuring the accuracy, the surface roughness of the bottom surface 12b and the top surface 12a of the standard chain link 12 both reach 0.1 level, and the thickness deviation between them is less than 0.1mm.

The above-mentioned tracking and positioning system can adopt the position tracking system of the existing dummy feeding mechanism, which tracks the position of the dummy bar 1 by calculating the pulse of the number of rotations of the roller table. Electronic components have a high failure rate, are easily damaged, and are prone to tracking loss. Therefore, preferably, described dummy bar tracking positioning system comprises positioning chain link 13 and video positioning system, described positioning chain link 13 is provided with positioning marks on the side opposite to video positioning system, and described video positioning system They are respectively connected with the reduction control system of the pulling and straightening rolls and the dummy feeding control system. The video positioning system obtains the on-site image through the camera device, and then recognizes the positioning chain link 13 through the video recognition software, and further compares the position of the identified positioning chain link 13 with the coordinates predicted by the system, and finally realizes the positioning chain link 13. That is, the tracking and positioning of the position of the dummy bar 1, and finally realize the correspondence between the standard chain link 12 and the tension-leveling roller 2 to be calibrated. Since the video positioning system adopts non-contact positioning, the ambient temperature of the site has little influence on it, thus ensuring the positioning accuracy and ensuring the operation of dummy feeding and roll gap calibration.

Further, the video positioning system is an infrared sizing system 3 . In the continuous casting cutting section, there is usually an infrared sizing system for slab sizing, so the use of the infrared sizing system can further reduce equipment investment and implementation costs. In order to apply to the infrared sizing system 3 in the cutting section, such In the implementation described in the figure, the positioning connection 13 is the third last section.

The positioning mark is different according to the video positioning system, and may be a cross, etc. Specifically, the positioning mark is a reflective surface 13a. In the example shown in the figure, the reflective surface 13a is formed by grinding and polishing and painting reflective paint.

In the example shown in the figure, the existing common chain links 11 are used for other chain links except the standard chain link 12 and the positioning chain link 13 .

Claims (6)

1. the roll gap calibration system that is used for billet continuous casting straightening machine, comprise the dummy bar (1) that constitutes by chain link, send dummy ingot mechanism and send the dummy ingot control system, straightening roller (2) the drafts control system of straightening machine, described dummy bar (1) is a head near an end of dummy bar head (14), the other end is an afterbody, it is characterized in that: at least one chain link is standard link (12) in each chain link of described dummy bar (1), the end face (12a) of described standard link (12) and bottom surface (12b) plane for being parallel to each other, and standard link (12) thickness between bottom surface (12b) and the end face (12a) is consistent with standard roll gap width; Be provided with corresponding with each straightening roller (2) respectively straightening roller position sensor, each straightening roller position sensor links to each other with amount control system under the straightening roll-in respectively.

2. the roll gap calibration system that is used for billet continuous casting straightening machine as claimed in claim 1, it is characterized in that: comprise the accurate chain link of a feast-brand mark (12) in each chain link of described dummy bar (1) head, be provided with the dummy bar tracing-positioning system, described tracing-positioning system respectively with the straightening roll-in under amount control system with send the dummy ingot control system to link to each other.

3. the roll gap calibration system that is incorporated in billet continuous casting straightening machine as claimed in claim 1 or 2 is characterized in that: the surface roughness of described standard link (12) bottom surface (12b), end face (12a) all reaches 0.1 grade, thickness deviation between the two all less than 0.1mm.

4. the roll gap calibration system that is used for billet continuous casting straightening machine as claimed in claim 2, it is characterized in that: described dummy bar tracing-positioning system comprises location chain link (13) and video navigation system, the side side that described location chain link (13) is relative with the video navigation system is provided with telltale mark, described video navigation system respectively with the straightening roll-in under amount control system with send the dummy ingot control system to link to each other.

5. the roll gap calibration system that is used for billet continuous casting straightening machine as claimed in claim 4 is characterized in that: described video navigation system is an infrared scale system (3).

6. as claim 4 or the 5 described roll gap calibration systems that are used for billet continuous casting straightening machine, it is characterized in that: described telltale mark is reflective surface (13a).

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