High-Precision Billet (Cut-by-Weight) Cut-to-Length System

概述

该系统通过机器视觉及激光测距系统实现对连铸产品的宽度、厚度、长度的定长测量，测量数据通过光纤传输到上位系统，上位系统根据不同钢种、比重计算出每根钢坯的重量，从而实现连铸产品的定长计量、定重控制，实现生产过程中炼钢工序的精准控制。在对钢坯进行定重定长切割后，通过在线称重测量系统对定重定尺系统进行校核，从而反馈给控制系统的定长模型。

还可利用机器视觉实现板坯编号（自动检查）的在线自动识别，并将重量和板坯编号自动存储到本地数据库，供生产和管理系统使用。

系统测量原理

On the upper surface of the billet, a set of linear CCD cameras and a laser rangefinding instrument are respectively installed. Through machine vision and laser correction, we can achieve precise measurement of the cast products’ shape. Through accurate cast products’ shape monitoring, the billet thermal expansion coefficient of cast products and cast products’ density at the current temperature, we can obtain the quality of the billet. At the same time, we can achieve high-precision quality cut-to-length , namely, fixed-weight and fixed-length. The system can be matched with the weight detection and calibration system.

The system adopts the online barrier-free hidden integral roller table weighing method for continuous casting products, and connects its weighing data into the intelligent control model. The model and steel billet weighing system, and the fixed weight cut-to-length system realize the closed-loop control of the system model, and optimize the fixed weight accuracy through automatic signal collection.

The features of the equipment

The cutting control technology for fixed-length and fixed-weight of cast products is a concrete manifestation of the lean production management of steel products. In the era of high-quality competition of steel products, only high-end intelligent technology and management can reduce costs, improve quality and market competitiveness.

1. Data management can be carried out according to shifts, pouring times, days, weeks, months, etc., as well as data management according to specifications, production capacity, quality, etc.

2. Each stream can send out signals such as pre-clamping, clamping, cutting, roll-up, roll-down and return of the cutting car according to the user’s requirements.

3. The detection and cutting precision is high, the controllable length sizing accuracy is ±1mm, and the quality sizing accuracy is more than 1.5‰.

4. It is not sensitive to other high-intensity light interference, and overcomes the influence of light sources such as sunlight and arc welding.

5. The monitor displays the running status of the current hot billet in real time and displays the corresponding parameters.

6. Laser rangefinding and CCD machine vision are used to calculate the weight of the cast products and optimize the cutting to length.

7. Historical cutting data is automatically stored, and the system can set rules for historical data.

8. Support the free transformation of fixed length, and a variety of operation modes are available for the operator to choose.

9. Adopt advanced high temperature laser measurement and high pixel linear CCD technology.

10. The system provides abundant interfaces, which can communicate with the PLC control.

11. Applicable to all kinds of continuous casting machine flame cutting system.

12. Provide automatic, upper and manual cutting control.

The main technical requirements

1. Width range of the inspected cast product: 120~2000 mm

2. Length range of the inspected cast product: 1000~20000 mm

3. 检测铸件厚度范围：35~400mm

4、钢坯移动速度：<3.5米/秒

5、坯料运行速度：<6.5m/min

6、被测钢坯温度：0～850℃

7、测量精度：宽度±0.2mm

                     厚度±0.2mm

                     长度±0.2mm

8、定重精度：0.8‰（温度模型验证）

9.质量检验检查：1‰

• 图1 测量示意图

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武汉中兴测控工程有限公司
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