Auxiliary device for ultrasonic hardness tester

Abstract

The auxiliary device comprises a base, a through hole is formed in the middle of the base, adjusting long round holes are formed in the four corners of the base, a fixing device is arranged at the through hole in the top of the base, and magnetic devices are arranged on the front side and the rear side of the bottom of the base. The magnetic device is installed at the bottom of the base through the two adjusting long round holes in the same side. The fixing device comprises a fixing cylinder welded to the top of the base, the inner diameter of the fixing cylinder is the same as the diameter of the through hole, a plurality of vertical long holes are evenly distributed in the circumference of the side wall of the fixing cylinder, springs are fixed to the bottoms of the vertical long holes, clamping rods are fixed to the tops of the springs and arranged in the vertical long holes in a penetrating mode, and clamping plates are arranged at the inner ends of the clamping rods. According to the utility model, the pressure head of the ultrasonic hardness tester is perpendicular to the pipeline, and pressure is uniformly applied; the ultrasonic hardness tester can be adsorbed on a pipeline to realize measurement of different positions, and is flexible, simple and convenient; the device can be suitable for pipelines of different specifications and is easy to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of material mechanics, in particular to an auxiliary device for an ultrasonic hardness tester. Background Art

[0002] Hardness is a very important index in the mechanical properties of materials. Like strength, it is to consider the relationship between the force and deformation of materials. Traditional hardness measurement methods include Brinell, Rockwell, Vickers, Leeb, etc. Among them, Brinell and Rockwell cause greater damage to the surface of the measured object, the Vickers method has a higher cost, and both cannot measure large workpieces. The Leeb hardness tester belongs to indirect measurement and has a large measurement deviation.

[0003] With the development of microprocessor technology, ultrasonic hardness testers have begun to be widely used. The principle of an ultrasonic hardness tester is to make the diamond indenter of the hardness tester contact the surface of the measured workpiece. Under a uniform contact pressure, the resonant frequency of the probe changes with hardness, and the hardness is measured by measuring the change of this frequency. This method causes minimal damage to the measured workpiece and has great superiority compared with other methods.

[0004] However, when measuring the hardness of a pipeline on-site, it is found that the measured values of the ultrasonic hardness tester deviate too much, affecting the judgment of the mechanical properties of the pipeline. Through experiments, the reason for the deviation is that when the ultrasonic hardness tester measures the hardness of the pipeline, the indenter is not vertically placed with the contact surface, resulting in uneven contact pressure, and the measured values are unstable and inaccurate. When the indenter is perpendicular to the contact surface, the measured values are stable and accurate. Summary of the Utility Model

[0005] The purpose of the utility model is to ensure that the indenter of the ultrasonic hardness tester is vertically placed with the contact surface when measuring the hardness of a pipeline, and to provide an auxiliary device for an ultrasonic hardness tester.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] An auxiliary device for an ultrasonic hardness tester includes a base. A through hole is provided at the middle position of the base, and adjustment oblong holes are provided at the four corners. A fixing device is provided at the through hole on the top of the base. Magnetic devices are arranged on the front and rear sides of the bottom of the base, and the magnetic devices are installed on the bottom of the base through two adjustment oblong holes on the same side.

[0008] The fixing device includes a fixing cylinder welded to the top of the base. The inner diameter of the fixing cylinder is the same as the diameter of the through hole. A plurality of vertical long holes are evenly distributed in the circumferential direction on the side wall of the fixing cylinder. Springs are fixed at the bottoms of the vertical long holes, and clamping rods are fixed at the tops of the springs. The clamping rods are arranged in the vertical long holes. Clamping plates are provided at the inner ends of the clamping rods, and the ultrasonic hardness tester passes through the fixing cylinder, the through hole and is clamped by the clamping plates.

[0009] The number of vertical long holes is four.

[0010] The magnetic device includes an adapter rod. The inside of the adapter rod is hollow and a magnetic rod is installed. One end of the magnetic rod is connected to a magnetic shaft. The magnetic shaft passes through the outside of the adapter rod and is vertically connected to a magnetic switch handle. A adjusting screw rod is fixed corresponding to the adjusting long circular hole at the top of the adapter rod. The adjusting screw rod passes through the corresponding adjusting long circular hole and is fastened by a wing nut.

[0011] A threaded hole runs through the end of the magnetic shaft. A threaded rod is provided at the bottom of the magnetic switch handle. The threaded rod of the magnetic switch handle is screwed into the threaded hole of the magnetic shaft.

[0012] An n-shaped handle is installed on the top of the base.

[0013] The base is of a cuboid structure.

[0014] The beneficial effects of the present utility model are as follows: The present utility model can make the indenter of the ultrasonic hardness tester be vertically placed with respect to the pipeline and apply pressure evenly; it can make the ultrasonic hardness tester be adsorbed on the pipeline to achieve measurement at different positions, which is flexible and simple; it is applicable to pipelines of different specifications and is easy to operate. Description of the Drawings

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

[0016] Figure 2 is a perspective view of the present utility model;

[0017] Figure 3 is an arrangement diagram of the bottom magnetic device of the present utility model;

[0018] Figure 4 is a cross-sectional view of the fixing device;

[0019] Figure 5 is a schematic diagram of a part of the vertical long hole on the side wall of the fixing device;

[0020] Figure 6 is a schematic diagram of the magnetic device;

[0021] In the figure: 1 - base; 2 - through hole; 3 - adjusting long circular hole; 4 - fixing device; 5 - magnetic device; 6 - n-shaped handle; 7 - ultrasonic hardness tester;

[0022] 41 - fixing cylinder; 42 - vertical long hole; 43 - spring; 44 - clamping rod; 45 - clamping plate;

[0023] 51 - adapter rod; 52 - magnetic rod; 53 - magnetic shaft; 54 - magnetic switch handle; 55 - adjusting screw rod; 56 - wing nut; 57 - threaded rod;

[0024] The following will be described in detail with reference to the accompanying drawings in connection with the embodiments of the present utility model. Specific embodiments

[0025] The principles and features of the present utility model will be described below with reference to the accompanying drawings. The examples given are only for explaining the present utility model and are not intended to limit the scope of the present utility model. In the following paragraphs, the present utility model will be described more specifically by way of example with reference to the accompanying drawings. According to the following description, the advantages and features of the present utility model will be clearer. It should be noted that the accompanying drawings are all in a very simplified form and use non-precise scales, and are only used to facilitate and clearly assist in explaining the purpose of the embodiments of the present utility model.

[0026] It should be noted that when a component is referred to as being "fixed to" another component, it can be directly on the other component or there can also be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs. The terms used herein in the specification of the present utility model are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0028] The present utility model will be further described below with reference to the accompanying drawings and embodiments:

[0029] As Figures 1 to 6 shown, an auxiliary device for an ultrasonic hardness tester, the device includes a base 1, a fixing device 4 and a magnetic device 5.

[0030] The fixing device 4 is composed of a fixing cylinder 41, a vertical long hole 42, a spring 43, a clamping rod 44 and a clamping plate 45.

[0031] The magnetic device 5 is composed of an adapter rod 51, a magnetic rod 52, a magnetic shaft 53, a magnetic switch handle 54, an adjusting screw 55, a wing nut 56 and a threaded rod 57.

[0032] The base 1 is of a cuboid structure, with a through hole 2 opened in the middle. Above the through hole 2, it is welded to the fixing device 4, and the inner diameter of the fixing device 4 is the same as the diameter of the through hole 2. Four corners of the base 1 are distributed with adjusting oblong holes 3 for the movement and fixed installation of the adjusting screw 55 on the magnetic device 5. There is an n-shaped handle 6 on the upper surface of the base 1, which can facilitate the movement of the whole device.

[0033] The fixing cylinder 41 is a cylinder, and a vertical long hole 42 is distributed at intervals of 90° in the circumferential direction of the fixing cylinder 41. The clamping rod 44 passes through the vertical long hole 42 on the fixing cylinder 41, and a clamping plate 45 is provided at the inner end of the clamping rod 44. The ultrasonic hardness tester 7 is fixed by the four clamping rods 44 and the clamping plate 45. The spring 43 is placed in the vertical long hole 42 on the fixing cylinder 41, one end is connected to the vertical long hole 42, and one end is connected to the clamping rod 44, which plays a supporting role for the clamping rod 44 and can also displace the ultrasonic hardness tester 7 downward to apply pressure.

[0034] Two groups of magnetic devices 5 are distributed at the bottom of the base 1, and the magnetic devices 5 are connected to the base 1 through the adjusting screw 55.

[0035] One end of the adjusting screw 55 is connected to the adapter rod 51, and the other end is connected to the wing nut 56. It passes through the adjusting oblong hole 3 on the base 1. By moving the adjusting screw 55 in the adjusting oblong hole 3, the adapter rod 51 can adapt to pipes of different specifications. One end of the magnetic switch handle 54 is a threaded part, namely the threaded rod 57, which is connected to the magnetic shaft 53 and can be disassembled. The magnetic shaft 53 is connected to the magnetic rod 54. By rotating the magnetic shaft 53, the magnetic rod 54 is driven to rotate, so that the magnetism of the magnetic rod 54 is turned on or off. The magnetic rod 54 is used to generate strong magnetism to adsorb the whole device on the pipe. The adapter rod 51 is hollow inside, and the magnetic shaft 53 and the magnetic rod 54 are distributed inside it. It is in direct contact with the pipe to be measured, is applicable to pipes of different specifications, and is adsorbed on the pipe surface.

[0036] The utility model can be used for the ultrasonic hardness tester 7 to measure the hardness of the pipe. Change the position of the adjusting screw 55 in the adjusting oblong hole 3 of the base 1 to make the adapter rod 51 in the magnetic device 5 fit the pipe surface. Tighten the wing nut 56 to fix the magnetic device 5. Rotate the magnetic switch handle 54 to make the magnetic device 5 adsorb on the pipe surface. Pass the ultrasonic hardness tester 7 through the fixing device 4 and the through hole 2, so that the indenter of the ultrasonic hardness tester 7 is in perpendicular contact with the surface of the pipe to be measured. Fix the ultrasonic hardness tester 7 through the four clamping rods 44 and the clamping plate 45 on the fixing device 4. At this time, the ultrasonic hardness tester 7 is stable on the pipe. Apply downward pressure to the ultrasonic hardness tester 7, and then the hardness measurement can be carried out.

[0037] The present utility model has been described exemplarily in conjunction with the accompanying drawings. Obviously, the specific implementation of the present utility model is not limited by the above-mentioned manner. As long as various improvements are made by adopting the method concept and technical solution of the present utility model, or directly applied to other occasions without improvement, they are all within the protection scope of the present utility model.

Claims

1. An auxiliary device for an ultrasonic hardness tester, characterized in that, It includes a base (1). A through hole (2) is provided at the middle position of the base (1), and adjustment oblong holes (3) are provided at the four corners. A fixing device (4) is provided at the top of the base (1) at the through hole (2), and magnetic devices (5) are arranged on the front and rear sides of the bottom of the base (1). The magnetic devices (5) are installed at the bottom of the base (1) through two adjustment oblong holes (3) on the same side.

2. The auxiliary device for an ultrasonic hardness tester according to claim 1, characterized in that, The fixing device (4) includes a fixing cylinder (41) welded to the top of the base (1). The inner diameter of the fixing cylinder (41) is the same as the diameter of the through hole (2). A number of vertical long holes (42) are evenly distributed in the circumferential direction on the side wall of the fixing cylinder (41). A spring (43) is fixed at the bottom of the vertical long hole (42), and a clamping rod (44) is fixed at the top of the spring (43). The clamping rod (44) is arranged in the vertical long hole (42). A clamping plate (45) is provided at the inner end of the clamping rod (44). The ultrasonic hardness tester (7) passes through the fixing cylinder (41), the through hole (2) and is clamped by the clamping plate (45).

3. The auxiliary device for an ultrasonic hardness tester according to claim 2, wherein The number of the vertical long holes (42) is four.

4. The auxiliary device for an ultrasonic hardness tester according to claim 1, wherein, The magnetic device (5) includes an adapter rod (51). The inside of the adapter rod (51) is hollow and a magnetic rod (52) is installed. One end of the magnetic rod (52) is connected with a magnetic axis (53). The magnetic axis (53) passes out of the adapter rod (51) and is vertically connected with a magnetic switch handle (54). An adjustment screw (55) is fixed at the top of the adapter rod (51) corresponding to the adjustment oblong hole (3). The adjustment screw (55) passes out of the corresponding adjustment oblong hole (3) and is fastened by a wing nut (56).

5. The auxiliary device for an ultrasonic hardness tester according to claim 4, characterized in that, A threaded hole is penetrated at the end of the magnetic axis (53). A threaded rod (57) is provided at the bottom of the magnetic switch handle (54). The threaded rod (57) of the magnetic switch handle (54) is screwed into the threaded hole of the magnetic axis (53).

6. The auxiliary device for an ultrasonic hardness tester according to claim 1, wherein, An n-shaped handle (6) is installed on the top of the base (1).

7. The auxiliary device for an ultrasonic hardness tester according to claim 6, characterized in that, The base (1) has a cuboid structure.

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