Small-load Vickers hardness tester

Abstract

The utility model provides a small-load Vickers hardness tester. The small-load Vickers hardness tester comprises a hardness tester body, a turntable and a lifting rod, wherein the turntable and the lifting rod are respectively arranged at the top and the bottom of the hardness tester body. And a pressure head is arranged on the turntable. And an objective table is mounted at the top of the lifting rod. Two scale marks passing through the center of the objective table are carved on the upper surface of the objective table and are perpendicular to each other. The two adjacent sides of the objective table are each provided with a set of adjusting assembly. The adjusting assembly comprises a supporting lug and a screw rod, and the supporting lug and the objective table are integrally formed. The screw rod is in threaded connection with the support lug, and the screw rod is positioned right above the scale marks. According to the utility model, the sample on the objective table is pushed by the screw rod to adjust the position of the sample, so that the sample appears in a field of view and is convenient to observe and measure. The scale marks below the screw are beneficial to observing the distance of the screw pushing the sample, so that the position of the sample can be adjusted more accurately.

Description

Technical Field

[0001] The utility model relates to the technical field of Vickers hardness testers, in particular to a small-load Vickers hardness tester. Background Art

[0002] The Vickers hardness tester is used to measure the Vickers hardness of thin materials. A regular square pyramid diamond indenter is pressed into the specimen surface under a test force. After a specified period of time, the force is removed and the diagonal length of the indentation is measured. The Vickers hardness tester produces a square indentation with a clear outline and accurate diagonal measurement. Therefore, the Vickers hardness test is the most accurate of the commonly used hardness testing methods and also offers excellent repeatability.

[0003] In existing Vickers hardness testers, both the indenter and objective lens are mounted on a turntable. The indenter compresses the specimen surface, while the objective lens observes the resulting indentation. However, due to the different axes of the indenter, objective lens, and worktable, switching between them using the turntable often results in the indentation falling outside the field of view, or the indentation position shifting significantly with even a slight rotation of the worktable. This necessitates complex positioning adjustments to ensure the indentation is within the field of view for easy observation.

[0004] The debugging process is usually extremely tedious and time-consuming, and may cause the stage to tilt and not remain level, resulting in the inability to form a square indentation on the specimen surface during the secondary test, which directly affects the measurement results. Utility Model Content

[0005] The utility model aims to provide a small-load Vickers hardness tester, which can solve the problem that the debugging process is troublesome and may cause the loading platform to tilt and fail to maintain levelness.

[0006] The purpose of this utility model is achieved through the following technical solutions:

[0007] A low-load Vickers hardness tester includes a hardness tester body, a turntable and a lifting rod respectively arranged at the top and bottom of the hardness tester body. The turntable is provided with an indenter. A loading platform is mounted on the top of the lifting rod. The upper surface of the loading platform is engraved with two scale lines passing through the center of the loading platform and perpendicular to each other. A set of adjustment components is provided on each adjacent side of the loading platform. The adjustment component includes a lug and a screw, and the lug is integrally formed with the loading platform. The screw is connected to the lug by a thread, and the screw is located directly above the scale lines.

[0008] Preferably, a mounting groove is provided on the top of the lifting rod, and at least three limiting rods are arranged equidistantly on the outer side of the top.

[0009] Preferably, the lower surface of the loading platform is provided with at least three grooves in a ring shape for docking with the limiting rod, and a fixing rod is provided at the center position for installation in the lifting rod.

[0010] Preferably, the number and size of the grooves are the same as those of the limiting rods, and the limiting rods are just inserted into the grooves.

[0011] Preferably, the shape and size of the fixing rod are adapted to the shape and size of the installation slot.

[0012] Preferably, an eyepiece is provided on the top front of the hardness tester body.

[0013] Preferably, the scale lines are in millimeters; and the stage is circular or a regular polygon.

[0014] Preferably, a handle is provided at one end of the screw.

[0015] The utility model adjusts the position of the sample by pushing the sample on the stage through the screw, so that it appears in the field of view, which is convenient for observation and measurement. In addition, the scale line below the screw is convenient for observing the distance the screw pushes the sample, so as to adjust the position of the sample more accurately. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a structural schematic diagram of a small-load Vickers hardness tester.

[0017] Figure 2 for Figure 1 Schematic diagram of the top view of the middle stage and adjustment components.

[0018] Figure 3 for Figure 1 Schematic diagram of the upper structure of the middle stage.

[0019] Figure 4 for Figure 1 Schematic diagram of the top view of the middle lifting rod.

[0020] The following are the descriptions of the reference numerals:

[0021] 1: Hardness tester body, 2: Turntable, 3: Lifting rod, 4: Indenter, 5: Stage, 6: Adjustment assembly, 7: Eyepiece, 31: Limit rod, 32: Mounting slot, 51: Scale line, 52: Groove, 53: Fixing rod, 61: Support ear, 62: Screw, 621: Handle. DETAILED DESCRIPTION

[0022] The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

[0023] The following describes the embodiments of the present disclosure through specific examples, and those skilled in the art can easily understand the advantages and effects of the present disclosure from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all of the embodiments. The present disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present disclosure. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.

[0024] Example 1

[0025] The utility model adjusts the position of the sample by pushing the sample on the stage through the screw, so that it appears in the field of view, which is convenient for observation and measurement. In addition, the scale line below the screw is convenient for observing the distance the screw pushes the sample, so as to adjust the position of the sample more accurately.

[0026] like Figure 1-2 As shown, a small-load Vickers hardness tester includes a hardness tester body 1 and a turntable 2 and a lifting rod 3 respectively arranged at the top and bottom of the hardness tester body 1. A pressure head 4 is provided on the turntable 2. A loading platform 5 is installed on the top of the lifting rod 3. The upper surface of the loading platform 5 is engraved with two scale lines 51 passing through the center of the loading platform 5 and perpendicular to each other. A group of adjustment components 6 are provided on both adjacent sides of the loading platform 5. The adjustment component 6 includes a support ear 61 and a screw 62, and the support ear 61 is integrally formed with the loading platform 5. The screw 62 is connected to the support ear 61 by a thread, and the screw 62 is located directly above the scale line 51. The angle between two adjacent screws 62 is 90°. On a horizontal plane, the position of the sample can be accurately corrected through two mutually perpendicular directions.

[0027] Furthermore, an eyepiece 7 is provided on the top front of the hardness tester body 1 for observing indentations within the objective lens' field of view. Furthermore, the scale lines 51 are in millimeters. Since the sample position field of view typically deviates by several millimeters, the minimum measurement unit of the scale lines 51 should be small; millimeters are more appropriate. The stage 5 is circular or a regular polygon. Furthermore, a handle 621 is provided at one end of the screw 62.

[0028] like Figure 3-4As shown, further, a mounting groove 32 is provided on the top of the lifting rod 3, and at least three limiting rods 31 are arranged equidistantly on the outside of the top. Furthermore, at least three grooves 52 are provided in a ring shape on the lower surface of the loading platform 5 for docking with the limiting rods 31, and a fixing rod 53 is provided at the center position for installation in the lifting rod 3. Furthermore, the number and size of the grooves 52 are the same as those of the limiting rods 31, and the limiting rods 31 are just inserted into the grooves 52. Furthermore, the shape and size of the fixing rod 53 are compatible with the shape and size of the mounting groove 32. When installing the equipment, the fixing rod 53 is plugged into the mounting groove 32, and the limiting rod 31 is plugged into the groove 52 one by one. The installation process is simple and the stability is high. The loading platform 5 can be maintained in a stable horizontal plane. Its disassembly and assembly process and horizontal stability are better than the prior art in which the loading platform 5 and the lifting rod 3 are fixed by bolts.

[0029] Working principle:

[0030] After the sample is compressed by the indenter 4 for a period of time, the objective lens is switched to the objective lens by rotating the turntable 2. The indentation on the sample is observed through the eyepiece 7. Under normal circumstances, the indentation will deviate from the field of view, or even be outside the field of view of the objective lens. At this time, the screw 62 is rotated by the handle 621. The screw 62 pushes the sample to move it into the field of view. Generally, two adjacent screws 62 are sufficient to push the sample into the field of view of the objective lens. As the screw 62 is rotated, the distance it advances is observed.

[0031] The adjustment process is rather cumbersome, typically requiring both manual and visual control. While observing the indentation position through the eyepiece 7, the screw 62 is rotated to push the specimen into the objective lens' field of view. The specimen position deviation that occurs after the turntable 2 switches objectives is limited to a certain range, a range that can be determined through multiple experiments. Therefore, in future experiments, two or more screws 62 can be directly adjusted after the indenter 4 has completed its compression of the specimen, bringing it into the objective lens' field of view. This makes the adjustment process much simpler and faster.

[0032] In the description of the present invention, it should be understood that the terms "middle", "length", "upper", "lower", "front", "back", "vertical", "horizontal", "inner", "outer", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0033] In the present invention, unless otherwise expressly specified or limited, a first feature "on" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. "Multiple" means at least two, such as two or three, unless otherwise expressly specified or limited.

[0034] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0035] The above is only for explaining the implementation mode of the present invention and is not intended to limit the present invention. For those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present invention without creative work should be included in the scope of protection of the present invention.

Claims

1. A small-load Vickers hardness tester, comprising a hardness tester body (1), a turntable (2) and a lifting rod (3) respectively arranged at the top and bottom of the hardness tester body (1); a pressure head (4) is arranged on the turntable (2); a loading platform (5) is installed on the top of the lifting rod (3); and the characteristics are: The upper surface of the loading platform (5) is engraved with two scale lines (51) passing through the center of the loading platform (5) and perpendicular to each other; a set of adjustment components (6) are provided on adjacent two sides of the loading platform (5); the adjustment component (6) includes a support ear (61) and a screw (62), and the support ear (61) and the loading platform (5) are integrally formed; the screw (62) is connected to the support ear (61) by a thread, and the screw (62) is located directly above the scale line (51).

2. The low-load Vickers hardness tester according to claim 1, wherein: A mounting slot (32) is provided on the top of the lifting rod (3), and at least three limiting rods (31) are arranged at equal intervals on the outside of the top.

3. The low-load Vickers hardness tester according to claim 2, wherein: The lower surface of the loading platform (5) is provided with at least three grooves (52) in a ring shape for docking with the limiting rod (31), and a fixing rod (53) is provided at the center position for being installed in the lifting rod (3).

4. The low-load Vickers hardness tester according to claim 3, wherein: The number and size of the grooves (52) are the same as those of the limiting rods (31), and the limiting rods (31) are just inserted into the grooves (52).

5. The low-load Vickers hardness tester according to claim 3, wherein: The shape and size of the fixing rod (53) are compatible with the shape and size of the mounting groove (32).

6. The low-load Vickers hardness tester according to claim 1, wherein: An eyepiece (7) is provided on the top front of the hardness tester body (1).

7. The low-load Vickers hardness tester according to claim 1, wherein: The scale lines (51) are in millimeters; and the loading platform (5) is a circle or a regular polygon.

8. The low-load Vickers hardness tester according to claim 1, wherein: One end of the screw rod (62) is provided with a handle (621).

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