Tool for detecting precision of inner hole of sleeve

Abstract

A sleeve inner hole precision detection tool comprises a force arm and a measuring disc, the measuring disc is a disc, the diameter of the measuring disc is matched with the aperture of a sleeve inner hole to be detected so that the measuring disc can be attached to the hole wall of the sleeve inner hole after entering the sleeve to be detected, one end of the force arm is connected to the circle center position of the measuring disc, and the other end of the force arm serves as a handheld end. The steel sleeve inner hole precision detection device is simple in structure, easy to manufacture, convenient to operate and high in accuracy, overall detection of steel sleeve inner hole precision is achieved, a deformed sleeve can be found in time, and smooth strip coiling is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the field of metal strip rolling, and particularly relates to a detection tool for the inner hole precision of a sleeve. Background Art

[0002] In metal strip rolling mills, during the production of strips, mandrels are required for coiling the strip coils during uncoiling and coiling. Due to frequent use of the mandrels, after years of repeated use, it is inevitable that they will be knocked, scratched, or damaged. After being damaged and deformed, using them on the machine will affect the product quality, and when deformed and installed for coiling, it will cause the coil to be unable to be unloaded, seriously affecting the normal progress of production. Therefore, a tool for detecting the inner hole precision of the mandrel is needed to determine whether the mandrel is deformed. Content of the Utility Model

[0003] The purpose of the utility model is to provide a detection tool for the inner hole precision of a sleeve, which is simple and convenient to use, has high efficiency, realizes the overall detection of the inner hole precision of the steel sleeve, and can thus timely detect the deformed sleeve to ensure the smooth progress of strip coiling.

[0004] To achieve the above purpose, the technical solution adopted by the utility model is: a detection tool for the inner hole precision of a sleeve, including a force arm and a measuring disk. The measuring disk is a disc, and its diameter is consistent with the aperture of the inner hole of the mandrel to be measured, so that after the measuring disk enters the mandrel to be measured, it can fit with the hole wall of the inner hole of the mandrel. One end of the force arm is connected to the center position of the measuring disk, and the other end is used as a hand-held end.

[0005] A threaded joint is fixedly connected to the end of the force arm, and the threaded joint is arranged coaxially with the force arm. A threaded hole is provided at the center position of the measuring disk for threaded connection with the threaded joint.

[0006] One end of the threaded joint is a fixed connection end, and the other end is a threaded end; the fixed connection end is fixedly connected to the force arm, and the diameter of the fixed connection end is larger than the diameter of the force arm.

[0007] A gasket and a nut are further provided at the threaded end to fasten the measuring disk.

[0008] The force arm is a hollow metal tube.

[0009] The end of the hand-held end of the force arm is processed into a rounded corner structure.

[0010] A plurality of weight-reducing holes are provided on the disk surface of the measuring disk.

[0011] The weight-reducing holes are a plurality of sector holes arranged at intervals around the center of the measuring disk.

[0012] The force arm is a multi-section combined structure, having two or more force arm sections, and the adjacent force arm sections are detachably connected.

[0013] The beneficial effects of the present utility model are as follows: The structure of the present utility model is simple, easy to manufacture, convenient to operate, and has high accuracy. During measurement, relying on the comparison between the measurement disk and the inner hole of the sleeve, the accuracy of the inner hole of the sleeve is detected during the process of the measurement disk moving from one end of the sleeve to the other end, to determine whether the sleeve is deformed. Moreover, it is also possible to judge the depth position where the deformation occurs according to the overall length of the tool and the distance between the hand-held end of the force arm and the end of the sleeve, which is conducive to the repair of the deformed position of the sleeve. Description of the Drawings

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0015] Figure 1 It is a schematic structural diagram of the present utility model in Embodiment 1;

[0016] Figure 2 It is a schematic structural diagram of the measurement disk of the present utility model in Embodiment 1;

[0017] Markings in the figure: 1, force arm; 2, measurement disk; 3, threaded joint; 4, gasket; 5, nut; 6, rounded corner structure; 7, weight-reducing hole. Detailed Embodiments

[0018] The following will further elaborate on the present utility model in conjunction with the drawings and embodiments, but it is not used as a basis for any limitation to the utility model.

[0019] Embodiment 1: As Figure 1 shown, a detection tool for the accuracy of the inner hole of a sleeve includes a force arm 1 and a measurement disk 2 installed at one end of the force arm 1. One end of the force arm 1 is welded with a threaded joint 3, and the threaded joint 3 is coaxial with the force arm 1. The other end of the force arm 1 is the hand-held end. One end of the threaded joint 3 is a fixed connection end for fixedly connecting with the force arm 1, and the other end is a threaded end with an external thread processed on it. The diameter of the fixed connection end is larger than the outer diameter of the force arm 1 and also larger than the diameter of the threaded end. The measurement disk 2 is a circular disk, and its diameter is adapted to the inner hole diameter of the sleeve to be detected. A threaded hole is processed at the center position of the measurement disk 2 and is threadedly connected to the external thread of the threaded joint 3. A gasket 4 and a nut 5 are also installed on the threaded joint 3. The nut 5 is screwed tightly on the external thread of the threaded joint 3 to fasten the measurement disk 2. The measurement disk 2 is clamped between the fixed connection end of the threaded joint 3, the gasket 4, and the nut 5 to ensure that the force arm 1 is perpendicular to the disk surface of the measurement disk 2.

[0020] Furthermore, the lever arm 1 is a hollow metal tube, such as a thick-walled steel pipe with a diameter of 40 mm. The end face of the hand-held end on the lever arm 1 is processed with a rounded corner structure 6 to prevent scratching the operator.

[0021] Furthermore, the fixed connection end of the threaded joint 3 is welded and fixed to the end of the lever arm 1. Alternatively, the threaded joint 3 is fixed to the end of the lever arm 1 by screws.

[0022] Furthermore, a number of weight-reducing holes 7 are processed on the disk surface of the measuring disk 2 to reduce the weight of the measuring disk 2 and the entire tool. Specifically, the weight-reducing holes 7 are fan-shaped holes and are arranged at intervals around the center of the measuring disk 2. In this embodiment, four fan-shaped holes arranged at intervals are provided on the disk surface of the measuring disk 2 as the weight-reducing holes 7.

[0023] According to the specifications of the sleeve, the present utility model has lever arms 1 with different lengths and measuring disks 2 with different diameters. During measurement, selection and assembly are carried out according to the size specifications of the sleeve.

[0024] The usage method of the present utility model is as follows: When it is necessary to detect the inner hole precision of the sleeve, the measuring disk 2 with a diameter adapted to the inner hole diameter of the sleeve is installed on the lever arm 1 with a suitable length and firmly fastened by the nut 5; then hold the hand-held end of the lever arm 1, align the measuring disk 2 with the inner hole of the sleeve and push it into the sleeve. As the lever arm 1 is pushed in, the outer diameter surface of the measuring disk 2 slides along the inner hole wall of the sleeve. Judgment basis: (1) If the measuring disk 2 can be smoothly pushed out from the other end of the sleeve finally, it indicates that the inner hole of the sleeve is standard and no deformation occurs; (2) If the measuring disk 2 gets stuck at a certain position in the sleeve, it indicates that deformation occurs at this position and needs to be repaired, and the depth of the measuring disk 2 extending into the sleeve can be measured, and the deformed position is marked outside the sleeve for subsequent repair. When the depth of the measuring disk 2 extending into the sleeve is greater than half of the sleeve length, for the convenience of measurement, the distance between the measuring disk 2 and the sleeve outlet can be measured from the outlet end of the sleeve, and corresponding marks are made on the outside of the sleeve.

[0025] The measuring disk 2 has a certain thickness. For example, in this embodiment, the thickness of the measuring disk 2 is 10 mm. When the present utility model is in use, relying on the fit between the outer diameter surface of the measuring disk 2 and the inner hole wall of the sleeve, it can provide guidance for the movement of the measuring disk 2, avoid the measuring disk 2 from being deflected during movement, and ensure the accuracy and reliability of the measurement result.

[0026] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the lever arm 1 is composed of multiple lever arm segments connected together, which can increase the length of the lever arm 1 to meet the detection requirements of sleeves with a relatively large length. The lever arm segments can still be made of hollow metal tubes. After adopting the multi-segment combined lever arm structure, when it is not needed, the lever arm can be removed to reduce the space required for storage. The multiple lever arm segments can be connected together by means of snap connection or threaded connection.

[0027] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Those of ordinary skill in the art should understand that the specific implementation manners of the present invention can be modified or equivalently replaced by referring to the above embodiments. Any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention are within the scope of protection of the claims pending for approval.

Claims

1. A tool for detecting the inner hole accuracy of a sleeve, characterized by: It includes a force arm and a measuring disc. The measuring disc is a circular disc whose diameter matches the aperture of the inner hole of the sleeve to be measured so that the measuring disc can fit with the hole wall of the inner hole of the sleeve after entering the sleeve to be measured. One end of the force arm is connected to the center of the measuring disc, and the other end is used as a handheld end.

2. The detection tool for sleeve inner hole accuracy according to claim 1, characterized in that: The end of the force arm is fixedly connected with a threaded joint, which is arranged coaxially with the force arm. A threaded hole is provided at the center of the measuring disk for threaded connection with the threaded joint.

3. The detection tool for sleeve inner hole accuracy according to claim 2, characterized in that: One end of the threaded joint is a fixed connection end, and the other end is a threaded end; the fixed connection end is fixedly connected to the force arm, and the diameter of the fixed connection end is greater than the diameter of the force arm.

4. The detection tool for sleeve inner hole accuracy according to claim 3, characterized in that: The threaded end is also provided with a washer and a nut to fasten the measuring disc.

5. The detection tool for sleeve inner hole accuracy according to claim 1, characterized in that: The lever arm is a hollow metal tube.

6. The detection tool for sleeve inner hole accuracy according to claim 5, characterized in that: The handheld end of the lever arm is processed into a rounded structure.

7. The detection tool for sleeve inner hole accuracy according to claim 1, characterized in that: A plurality of weight-reducing holes are arranged on the disk surface of the measuring disk.

8. The detection tool for sleeve inner hole accuracy according to claim 7, characterized in that: The weight-reducing holes are a plurality of fan-shaped holes arranged at intervals around the center of the measuring disk.

9. The detection tool for sleeve inner hole accuracy according to claim 1, characterized in that: The lever arm is a multi-section combined structure having two or more lever arm sections, and adjacent lever arm sections are detachably connected.

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