CN210833440U

CN210833440U - Fixed target ball seat

Info

Publication number: CN210833440U
Application number: CN201922043345.6U
Authority: CN
Inventors: 徐建峰; 郭立平
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

The utility model provides a fixed target ball seat, this target ball seat's base has the through-hole, installs the magnet ring in the middle part embedding of base, and the through-hole of magnet ring keeps unanimous with the through-hole of base, the base top is equipped with the retaining ring, and this retaining ring is used for preventing the magnet ring at the inside displacement that takes place of base, the base through-hole has the screw thread for the screw in screw rod, the through-hole face of base upper surface one side has the ball conical surface for closely laminate with the target ball sphere.

Description

Fixed target ball seat

Technical Field

The utility model belongs to the technical field of the metallurgical measurement, in particular to fixed target ball seat.

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.

In laser measurements, the need to fix a target ball holder is often encountered. The existing method for fixing the target ball seat is to spray glue on the target ball seat by a hot glue gun so as to fix the target ball seat on the ground of a detection site. Because the working condition environment of many detection sites is more extreme, under the environment of subcooling or overheated, the glue of fixed target ball seat can embrittle the inefficacy, loses the fixed effect to the target ball seat finally. Since the three-dimensional coordinate system constructed in each detection should be constant, and the position of each target ball seat corresponds to the reference point in the coordinate system, it cannot be moved freely. The displacement caused by one error affects the whole coordinate system, thereby reducing the detection precision.

Meanwhile, as the number of field workers is large, the target ball seat is kicked unintentionally in the walking process of the workers, and finally the target ball seat is lost. And the average selling price of one target ball seat is about 600 yuan. The loss of the target ball seat brings unnecessary economic loss to a detection company on one hand, and forces detection personnel to reconstruct a three-dimensional space coordinate system on the other hand, thereby delaying the normal detection progress.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a fixed target ball seat for solve the target ball seat and be removed, lose the problem easily at the measurement site easily.

The embodiment of the utility model provides an one of, a fixed target ball seat, the base of this target ball seat has the through-hole, installs the magnet ring in the middle part embedding of base, and the through-hole of magnet ring keeps unanimous with the through-hole of base.

The top of the base is provided with a retainer ring, and the retainer ring is used for preventing the magnet ring from displacing in the base. The base through hole is provided with threads and is used for screwing in the screw. The through hole surface on one side of the upper surface of the base is provided with a spherical curved surface for being tightly attached to the spherical surface of the target ball, and the radius of the spherical curved surface is consistent with the radius of the target ball.

The utility model discloses to the difficult problem that meets in the actual detection, provide a fixed target ball seat, 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-base, 2-magnet ring, 3-retainer ring, 4-screw thread.

Detailed Description

According to one or more embodiments, as shown in fig. 1 and 2, a fixed target ball holder has a base having a through hole, a magnet ring is inserted into a middle portion of the base, and the through hole of the magnet ring is aligned with the through hole of the base. The top of the base is provided with a retainer ring, and the retainer ring is used for preventing the magnet ring from displacing in the base. The base through hole is provided with threads and is used for screwing in the screw. The through hole surface on one side of the upper surface of the base is provided with a spherical curved surface for being tightly attached to the spherical surface of the target ball, and the radius of the spherical curved surface is consistent with the radius of the target ball. 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 target ball seat is matched with a magnet gasket and a screw rod to be used together in a detection field. The screw rod firstly passes through the central hole of the magnet gasket, and then the screw rod and the magnet gasket are fixed on the plane of a detection field by AB glue. As shown in fig. 3. After the glue is completely solidified, the target ball seat of the embodiment is screwed into the screw. And after screwing down, a circle of silica gel is arranged at the bottom of the target ball seat for reinforcement. Through the triple reinforcement of AB glue, screw, silica gel, can ensure the stable fixed of target ball seat for a long time, make it become a stable check point in the calibration system for detection.

Because the working condition environment of a steel rolling site is severe, vibration and high temperature are inevitably generated in the actual billet rolling process. And silica gel is limited by the material, and is very easy to deform in the environment for a long time, so that the silica gel is peeled off from the attached plane. The traditional target ball seat is only fixed by the silica gel, and once the silica gel is peeled off, the silica gel inevitably spreads to the target ball seat, so that the displacement and even the loss of the target ball seat are caused. The target ball seat of the embodiment is reinforced by the three layers of AB glue, screws and silica gel, so that the target ball seat has strong tolerance to the field working condition environment, and the position of the target ball seat cannot be changed within several years unless the target ball seat is removed artificially, so that the stability and uniqueness of a detection coordinate system are realized.

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 fixed target ball seat is characterized in that a base of the target ball seat is provided with a through hole, a magnet ring is embedded and installed in the middle of the base, the through hole of the magnet ring is consistent with the through hole of the base,

the top of the base is provided with a retainer ring which is used for preventing the magnet ring from displacing in the base,

the base through hole is provided with threads for screwing in a screw rod,

the through hole surface on one side of the upper surface of the base is provided with a spherical curved surface for being tightly attached to the spherical surface of the target ball, and the radius of the spherical curved surface is consistent with the radius of the target ball.