CN210833441U

CN210833441U - Target ball seat for fixing calibration system

Info

Publication number: CN210833441U
Application number: CN201922043407.3U
Authority: CN
Inventors: 徐建峰; 郭立平; 陈诚
Original assignee: Shanghai Dingye Metallurgy Technology Co ltd
Current assignee: Shanghai Dingye Metallurgy Technology Co ltd
Priority date: 2019-11-22
Filing date: 2019-11-22
Publication date: 2020-06-23
Anticipated expiration: 2029-11-22

Abstract

A backing plate for a fixed calibration system, the backing plate comprising: a cylindrical base having a through hole; the magnet ring is embedded in the upper half part in the cylindrical base; the retainer ring is embedded in the cylindrical base arranged above the magnet ring and used for preventing the magnet ring from displacing in the base; and the expansion bolt is nailed into the ground through the base through hole.

Description

Target ball seat for fixing calibration system

Technical Field

The utility model belongs to the technical field of the metallurgical measurement, in particular to a target ball seat for fixing calibration system.

Background

Due to the limitation of the steel rolling process of a steel rolling mill, the working environment of the steel rolling mill is poor, and negative factors including high temperature, dust, oil stain, noise, radiation and the like have negative effects on field rolling mill equipment and workers. High temperature and high humidity generated at any moment in the steel rolling process inevitably cause corrosion, abrasion and impact on a rolling mill frame, particularly a window body, an upper roller and a lower roller, so that the spatial positions of all parts of the rolling mill are changed. The rolling precision of the rolling mill is closely related to the spatial positions of various components of the rolling mill. Once the spatial positions of the window of the rolling mill and the internal rollers are displaced relatively, the specification of the finally rolled and formed steel cannot meet the specified requirement.

In order to monitor and adjust and recover the working accuracy of the rolling mill, the relative position of the rolling mill window and the inner roll system needs to be detected by laser, and the position is adjusted according to the detected relative position deviation so as to recover the original design value. The detection method is that a target ball is fixed at the position of a rolling mill to be detected, then a laser tracker emits a laser beam to the target ball, and at the moment, a triangular prism in the target ball receives the laser beam, so that the absolute distance between two points can be accurately measured. The position or reference point measurement by using a laser tracker is a commonly used method in the metallurgical industry, and a plurality of documents are provided for the measurement system and the principle of the method. There are also commercially available target balls for use with laser trackers. For example, Leica Geosystems provides a target ball that is a metal ball fitted with a triangular reflector to ensure a constant offset when measuring a surface.

For the detection of a rolling mill or a rolling mill production line, a laser tracker, a target ball and other auxiliary detection tools must be arranged on hardware, and a virtual three-dimensional space coordinate system needs to be constructed on software. The construction of the system requires the detection personnel to arrange appropriate detection points, commonly called stationing, around the equipment to be detected. For one device, the number of the stationing points is at least 8 to 10 points, and the required time is at least 1 hour. For a production line, the distribution quantity is increased according to the quantity of rolling mill equipment of the production line, and the distribution time is increased step by step. Therefore, the arrangement of the detection points is an essential step for each detection of the rolling mill. The establishment of a permanent calibration system is significant in solving the above problems, and thus a dedicated target ball seat suitable for the permanent calibration system is required.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a target ball seat for can permanent fixed calibration system for establish a permanent calibration system at the rolling mill.

The embodiment of the utility model provides an one, a target ball seat for fixing calibration system, this target ball seat includes:

a cylindrical base having a through hole;

the magnet ring is embedded in the upper half part in the cylindrical base;

the retainer ring is embedded in the cylindrical base arranged above the magnet ring and used for preventing the magnet ring from displacing in the base;

and the expansion bolt is nailed into the ground through the base through hole.

The utility model discloses to the difficult problem that meets in the actual detection, provide a target ball seat of fixed calibration system, to a great extent has improved the actual problem that is difficult to effectively fix the target ball that often meets in the present laser detection, has really realized three big characteristics of accuracy, high efficiency, the safety that laser detected.

Drawings

The above and other objects, features and advantages of exemplary embodiments of the present invention will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. Several embodiments of the present invention are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which:

fig. 1 is a schematic view of a target ball seat according to an embodiment of the present invention.

Fig. 2 is an exploded view of a target ball seat according to an embodiment of the present invention.

Figure 3 is a schematic diagram of a target ball seat in accordance with an embodiment of the present invention.

1-cylindrical base, 2-magnetic ring, 3-retainer ring.

Detailed Description

In accordance with one or more embodiments, as shown in fig. 1 and 2, a target ball holder for a fixed calibration system includes a cylindrical base, a magnet ring, a retainer ring, and an expansion bolt. The cylindrical base is provided with a through hole, the through hole is provided with a spherical curved surface, and the radius of the spherical curved surface is consistent with the radius of the target sphere. The radius of this spherical surface can be chosen to be 19.05mm, depending on the size of the target sphere at hand. The surface roughness of the spherical curved surface can be Ra 0.2-1.2 μm, and the same roundness of any circumference of the curved surface is less than or equal to 0.01 mm. After the target ball is placed on the target ball seat, the distance between the lowest point of the target ball surface and the magnet ring is recommended to be controlled to be 0.6-1.55 mm, so that the moderate magnetic force is ensured.

The magnet ring is embedded in the upper half part of the cylindrical base, and the retainer ring is embedded in the cylindrical base arranged above the magnet ring and used for preventing the magnet ring from displacing in the base; the expansion bolt is nailed into the ground through the base through hole. And reinforcing cement is filled in the through hole of the base. The target ball seat also comprises a protective cover, and the upper part of the base through hole is provided with threads which are used for screwing the protective cover.

Further, in accordance with one or more embodiments, a permanent calibration system target ball holder is constructed from five components, namely, a protective cover made of aluminum alloy, a cylindrical base made of stainless steel, a magnet block, a retaining ring screw made of metal, and an expansion bolt made of stainless steel. The magnet block and the check ring are placed inside the cylindrical base, and the magnet block is locked by the check ring, so that the magnet block is prevented from rotating and moving inside the base body. The center of the base of the special target ball seat is drilled with a small hole for screwing an expansion bolt of about 2cm at the bottom of the base. During detection, the target ball is placed on the circular groove surface on the upper surface of the base, the target ball is retracted after detection is finished, and the protective cover is screwed into the base through the threaded port to protect the base from the influence of external environment and human factors.

As shown in fig. 3, in actual testing, a small hole is first drilled in a cement foundation at a testing site, and then a target ball holder provided with an expansion bolt is placed in the small hole, and cement is poured into the small hole. The expansion bolt releases stress in a small internal environment filled with cement, so that the fixing strength of the expansion bolt is 5 times higher than that of a traditional glue fixing mode. The strength of the base body and the double reinforcement of the expansion bolt can permanently fix the target ball seat on a detection site to construct a permanent calibration system unless extreme environment phenomena (such as earthquakes, tsunamis and the like) occur.

The permanent calibration system has the advantages that the detection time can be greatly saved, and the detection precision and consistency are ensured. After the target ball seats are utilized to perform centralized point arrangement around the rolling mill equipment, a three-dimensional space coordinate system is constructed and finished, and formal detection is carried out. After the detection is finished, the main equipment such as detection personnel and a laser detector can be evacuated, the special target ball seat can cover the protective cover tightly and is left on the detection site to become a reference point in a permanent calibration system, and the position deviation can not occur under the normal condition. When the rolling mill needs to be detected again at an interval of 1 or 2 years, the detection personnel can take the detection equipment again to enter the steel rolling field, and at the moment, the time is not needed to be spent to implement distribution, but the permanent calibration point positioned by the special target ball seat in the current year can be directly started. The protective cover is only required to be unscrewed, the target ball is placed, the calibration points are quickly collected, then the system is constructed in software, and the new system is matched with the permanent calibration system constructed in the current year. In view of the structural stability of the dedicated target tee, the two systems are typically fully coincident. If a small displacement in position occurs, the software will automatically fit the new system to the permanent calibration system, which takes only a few minutes.

In summary, if there is no permanent calibration system and associated target tee, it will take several hours or more for the inspector to perform the site placement each time. Meanwhile, the points arranged each time are certainly different from the points arranged in the last detection, so that the reference points adopted by the system constructed by each detection are inconsistent, the coordinate systems used in each detection are different from each other, namely, inconsistency exists among the systems, and the detection precision is further influenced. The target ball seat for the permanent calibration system plays an irreplaceable role in constructing the permanent calibration system.

It is worth noting that while the foregoing has described the spirit and principles of the present invention with reference to several specific embodiments, it is to be understood that the present invention is not limited to the disclosed embodiments, nor is the division of aspects, which is for convenience only as the features in these aspects cannot be combined. The invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A target ball holder for use in a fixed calibration system, the target ball holder comprising:

-a cylindrical pedestal having a through hole with a spherical surface having a radius in conformity with the radius of the target sphere;

the magnet ring is embedded in the upper half part in the cylindrical base;

-an expansion bolt driven into the ground through the base through hole.

2. The backing plate of claim 1, wherein the base through-hole is cemented.

3. The target ball holder of claim 2, further comprising a protective cap, wherein the base through hole has threads on an upper portion thereof for screwing the protective cap.