How to achieve multi-angle measurement of high-speed wire?


As a wire rod manufacturer, changing the direction of product demand, achieving product upgrading, and pursuing new profit growth points have become an impending task. Changing the direction of product demand means that the production of wire rods satisfies the need for deep processing of wire products. This requires discs. The dimensional accuracy of the bar must be improved, and the dimensional accuracy of the wire rod is improved. It not only depends on the improvement of the worker's operation level and quality consciousness, but also requires a pair of electronic eye monitoring. The high-line diameter gauge serves as an electronic eye for the wire production process. The wire rod is tested in real time, and at the same time, in order to more accurately obtain the cross-section information of the high-speed wire rod, a multi-angle measurement method is adopted.

1, basic measurement principle

The basic measuring principle of the high-wire diameter measuring instrument is the principle of photoelectric measurement. The high-line diameter measuring instrument adopts the telecentric optical path of the object and the imaging method for on-line dimension detection. The core component of the detection is an optoelectronic probe, and each group of probes consists of an emission lens and Receiving the lens composition. The light emitted by the point source of the transmitting lens forms a parallel light field of view through the transmitting lens to the receiving lens. The collimated light is then focused by the receiving lens and imaged on the receiving unit via the aperture in the focus position. When passing through the measured object in the field of view, the part blocked by the measured object will show a clear shadow on the chip of the receiving unit. Through photoelectric conversion and digitization, the diameter of the measured object can be calculated through the width of the shadow.

2, the composition of the probe

This article was written at the beginning of this article. This is mainly about multi-angle caliper gauges. It can be used to measure the wire diameter of high-speed wire rods from various aspects.

2.1, four probes

The figure above shows a high-line caliper instrument consisting of four groups of probes. It can measure the outer diameter dimension of four directions of the same section of high-speed wire and can detect ellipticity information. It is a high-precision on-line inspection equipment. Commonly used in steel rolling Rolling site use.

The figure above shows one of the four diameter measuring instruments. It is equipped with an IPC system to achieve high-precision measurement of the wire diameter. It is equipped with a software system that can display detailed information required for the process, and provides real-time measurement and display of data. Analysis and other functions, and can carry out the alarm.

2.2, eight probes

The figure above shows a high-line caliper consisting of eight probes. This caliper can measure the wire diameter in eight directions of the same cross-section of a high-speed wire rod and is a device that can achieve full-scale inspection.

3, all-round detection of eight probes

The advantage of this imaging measurement principle of the high-line diameter measuring instrument is that the contours can be clearly and simultaneously captured at extremely high shooting speeds. The dimensions of the same section are arranged on the same plane by eight basic measuring units separated by 22.5°. Quickly measure the profile dimensions of the same section of the object under test. This measurement forms an outer 16-sided shape that approximates the complete circular section. It is the only measurement device that can actually obtain the same profile size at the same time.

The data measured by the eight probes has approached a complete cross-sectional shape. The two light-ray crossing areas are insensitive areas (not undetectable, but not sensitive, even the most insensitive point—the protrusions at 11.25° need only be larger than the diameter. 0.98%, can be measured), measurement error is also very small. The actual situation of the production line is that the measured object always has a certain angle of rotation, the measured object as long as the radial rotation is greater than 5% of the measurement error is less than 0.3% of the diameter Therefore, this measurement method does not only have no 'blind region', and the measurement error of the convex defect is not more than 0.98% of the diameter and generally does not exceed 0.3% of the diameter. It measures the cross section at the same time with the high-speed measurement method of the cross section. The amount of data in the shape is 100 times that of the rotation measurement method, and it is (2000-6000) times that of the swing measurement method.


The eight gauge caliper and the four caliper gauges are commonly used wire diameter testing equipment, which can be measured according to requirements. The eight sets of caliper gauges have more comprehensive data angles. The use of line caliper instrument plays a very good role in improving the product quality of high-speed wire rod mills, and it also promotes the resources saving and production cost reduction.

This article consists of Baoding Lanpeng Measurement & Control Technology Co., Ltd. write