CN212031141U - Clamping device for microhardometer - Google Patents

Abstract

The utility model discloses a clamping device for a micro hardness tester, which comprises a clamping body, a first clamping table and a second clamping table. The top surface of the clamping body is provided with positioning holes, and the first clamping table is provided with positioning holes. The holding table is fixed in the middle of the top end of the clip body. There are two second holding tables in total. The second holding table is respectively fixed on both sides of the top of the clip body, and the second holding table is installed on Outside the two sides of the first clamping table, the first clamping table includes a screw lifting table, the outer outer side of the screw lifting table is provided with a rotating nut, and the bottom end of the rotating nut is provided with a limiting block inside, The outer surface of the limit block is provided with serrations, and both ends of the top of the rotating nut are provided with sheet-like pressing plates; the clamping device can not only clamp samples with parallel planes, but also clamp small sections or shapes. Irregular samples avoid the inconvenience of repeatedly replacing the sheet clamping table and the mouth clamping table, and improve the accuracy and efficiency of microhardness measurement.

Description

A clamping device for micro hardness tester

technical field

The utility model belongs to the technical field of micro-hardness testing, in particular to a clamping device for a micro-hardness tester.

Background technique

The microhardness tester is a commonly used device for measuring the hardness of microstructures. Its working principle is to focus the light on the surface of the sample through the focusing mechanism of the measuring microscope of the microhardness tester, and select the test force and loading speed correctly. The mechanism automatically loads and unloads the test force, and correctly controls the holding time of the test force. Through the optical magnification of the microscope, measure the correctness of the indentation left after the diamond pyramid indenter is pressed into the surface of the object to be measured under a certain test force. The length of the angle line is used to obtain the hardness value of the tested object. The loading test force of the microhardness tester is usually between 0.09807N (10gf) and 9.807N (1000gf). It is mainly used for small parts, thin parts and parts. Measurement of special parts and surface hardness.

The cross table, sheet holding table and mouth holding table equipped with the microhardness tester can better hold samples with relatively regular shapes; when measuring samples of different shapes, it is often necessary to repeatedly replace the sheet holding table and the mouth holding table. The flat-mouth clamping table leads to low test efficiency; when the perpendicularity between the surface of the tested sample and the pressure cone is not high, the sample is often unstable during the loading process of the test force, resulting in inaccurate measurement results. When testing irregular samples The solution to the instability problem is cold inlay or hot inlay at present. The production of the inlaid sample is more troublesome, and the hardness of the sample may change during the processing. device.

Utility model content

The purpose of the present invention is to provide a clamping device for a micro hardness tester, so as to solve the problem that the current hardness test proposed in the above-mentioned background art requires repeated replacement of the sheet clamping table and the mouth clamping table.

In order to achieve the above purpose, the present invention provides the following technical solutions: a clamping device for a microhardness tester, comprising a clamping body, a first clamping table and a second clamping table, wherein the top surface of the clamping body is provided with A positioning hole, the first clamping table is fixed on the middle of the top end of the clamping body, there are two second clamping tables in total, and the second clamping table is respectively fixed on both sides of the top of the clamping body, the The second clamping table is respectively installed outside the two sides of the first clamping table;

The first clamping table includes a screw lifting table, the outer side of the screw lifting table is provided with a rotating nut, the bottom end of the rotating nut is internally provided with a limit block, and the outer surface of the limit block is provided with a rotating nut. sawtooth, and both top ends of the rotating nut are provided with sheet-like pressing plates;

The second clamping table includes a support block, the bottom end of the support block is provided with a screw rod, the top surface of the support block is provided with a connecting plate, the connecting plate and the support block are fixedly connected with screws, the The bottom of the outer end of the connecting plate is fixedly connected with a jaw.

Preferably, square grooves are formed on both sides of the top of the clamping body, the bottom end of the support block is fixed inside the square groove, the external width of the support block is equal to the internal width of the square groove, and the screw rod has the same width. The outer end penetrates the square groove and is fixed on the outside of the clamp body.

Preferably, the top of the clamp body is provided with bolt holes at both ends of the square groove, the interior of the clamp body is provided with limit baffles at both ends of the support block, and the top surface of the limit baffle is fixed A fixing column is connected, and the fixing column and the bolt hole correspond to each other.

Preferably, a total of four positioning holes are provided, the positioning holes are respectively provided at the four peripheral end corners of the clamp body, a total of two sheet-shaped pressing plates are provided, and the sheet-shaped pressing plates are fixedly connected to the rotating nut with a support seat.

Preferably, the sheet-shaped pressing plates are respectively fixed on both ends of the top of the screw lifting table, and the jaws are respectively fixed on both sides of the top of the screw lifting table.

Compared with the prior art, the beneficial effects of the present utility model are:

Through the designed lead screw, clamp body, support block, jaw, connecting plate, screw, lead screw lift table, sheet pressure plate, support seat, rotating nut and limit block, the clamping device can be clamped with parallel planes. It can also clamp small-section or irregular-shaped samples, avoiding the inconvenience of repeatedly replacing the sheet clamping table and the mouth clamping table, and improving the accuracy and efficiency of microhardness measurement.

Description of drawings

Fig. 1 is the structural representation of the utility model;

FIG. 2 is a schematic structural diagram of the second clamping table of the present invention.

In the figure: 1. Screw; 2. Clamp body; 3. Connecting plate; 4. Sheet pressure plate; 5. Jaw; 6. Screw; 7. Square slot; 8. Bolt hole; 9. Positioning hole; 10. Screw lifting platform; 11. Rotating nut; 12. Support seat; 13. Limit block; 14. Support block; 15. Limit baffle; 16. Fixed column.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

1-2, the present invention provides a technical solution: a clamping device for a micro-hardness tester, comprising a clamping body 2, a first clamping table and a second clamping table, the top surface of the clamping body 2 is Both are provided with positioning holes 9, the first clamping table is fixed in the middle of the top end of the clamping body 2, there are two second clamping tables in total, the second clamping table is respectively fixed on both sides of the top of the clamping body 2, the second clamping table is The clamping tables are respectively installed outside the two sides of the first clamping table;

The first clamping table includes a screw lifting table 10, a rotating nut 11 is provided on the outside of the screw lifting table 10, a limiting block 13 is arranged inside the bottom end of the rotating nut 11, and the outer surface of the limiting block 13 is provided with serrations, Both ends of the top of the rotating nut 11 are provided with sheet-like pressing plates 4;

The second clamping table includes a support block 14 , the bottom end of the support block 14 is provided with a screw 1 , the top surface of the support block 14 is provided with a connecting plate 3 , and the connecting plate 3 is fixedly connected to the support block 14 with screws 6 , and the connecting plate A jaw 5 is fixedly connected to the bottom of the outer end of 3 .

In order to facilitate the clamping of samples with small sections or irregular shapes, in this embodiment, preferably, square grooves 7 are formed on both sides of the top of the clamp body 2, and the bottom end of the support block 14 is fixed inside the square groove 7. The outer width of the support block 14 is equal to the inner width of the square groove 7 , and the outer end of the screw rod 1 penetrates the square groove 7 and is fixed to the outside of the clamping body 2 .

In order to facilitate the manipulation and use of the second clamping table, in this embodiment, preferably, the top of the clamping body 2 is provided with bolt holes 8 at both ends of the square groove 7 , and the interior of the clamping body 2 is at both ends of the support block 14 . Limiting baffles 15 are provided on both sides, and a top surface of the limiting baffles 15 is fixedly connected with a fixing column 16 , and the fixing column 16 and the bolt holes 8 correspond to each other.

In order to facilitate the clamping of samples with parallel planes, in this embodiment, preferably, four positioning holes 9 are provided in total, and the positioning holes 9 are respectively provided at the peripheral end corners of the clamping body 2, and the sheet-shaped pressing plate 4 is provided with a total of two A support seat 12 is fixedly connected to the sheet-like pressing plate 4 and the rotating nut 11 .

In order to avoid repeated replacement of the sheet clamping table and the mouth clamping table, in this embodiment, preferably, the sheet pressing plates 4 are respectively fixed on the top two ends of the screw lifting table 10, and the jaws 5 are respectively fixed on the screw lifting table 10 top sides.

The working principle and use process of the utility model: after the installation of the device is completed, the clamping body 2 is connected to the cross table of the micro-hardness tester through the four positioning holes 9 provided at the surrounding end corners, and the rotating nut 11 drives the wire through the screw pair. The rod lifting table 10 rises or falls, and the sheet pressing plate 4 above it presses or loosens the sheet sample, so as to facilitate the microhardness test of the sheet sample. The first clamping table is positioned by the top surface of the screw lifting table 10 , limit the three degrees of freedom of X, Y and Z of the tested sample, clamp the distance by adjusting the distance between the positioning plane and the upper two sheet-like pressure plates 4, and rotate the screw 1 to drive the support block 14 through the screw pair, so that the two The jaws 5 move to the middle or both sides, so as to realize the clamping or loosening of the sample. The second clamping table is positioned by the side plane to limit the three degrees of freedom of X, Y and Z of the tested sample. By rotating the screw rod 1. Clamp or loosen the two jaws 5.

Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes and modifications can be made to these embodiments without departing from the principles and spirit of the present invention , alternatives and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (5)

1. The utility model provides a clamping device for microhardometer, includes the anchor clamps body (2), first centre gripping platform and second centre gripping platform, its characterized in that: the top surface of the clamp body (2) is provided with positioning holes (9), the first clamping tables are fixed in the middle of the top end of the clamp body (2), the number of the second clamping tables is two, the second clamping tables are respectively fixed on two sides of the top of the clamp body (2), and the second clamping tables are respectively installed outside two sides of the first clamping tables;

the first clamping table comprises a screw rod lifting table (10), a rotating nut (11) is arranged outside the outer side of the screw rod lifting table (10), a limiting block (13) is arranged inside the bottom end of the rotating nut (11), sawteeth are formed in the outer side surface of the limiting block (13), and sheet-shaped pressing plates (4) are arranged at two ends of the top of the rotating nut (11);

the second clamping table comprises a supporting block (14), a screw rod (1) is arranged outside the bottom end of the supporting block (14), a connecting plate (3) is arranged on the top end surface of the supporting block (14), the connecting plate (3) and the supporting block (14) are fixedly connected with screws (6), and a jaw (5) is fixedly connected to the bottom of the outer end of the connecting plate (3).

2. A holding device for a microhardness tester according to claim 1, wherein: the clamp comprises a clamp body (2), square grooves (7) are formed in two sides of the top of the clamp body (2), the bottom ends of supporting blocks (14) are fixed inside the square grooves (7), the outer width of the supporting blocks (14) is equal to the inner width of the square grooves (7), and the outer ends of screw rods (1) penetrate through the square grooves (7) and are fixed outside the clamp body (2).

3. A holding device for a microhardness tester according to claim 2, wherein: bolt holes (8) are formed in the two ends of the square groove (7) at the top of the clamp body (2), limiting baffle plates (15) are arranged at the two ends of the supporting block (14) in the clamp body (2), fixing columns (16) are fixedly connected to the surfaces of the tops of the limiting baffle plates (15), and the fixing columns (16) correspond to the bolt holes (8) mutually.

4. A holding device for a microhardness tester according to claim 1, wherein: the fixture is characterized in that the number of the positioning holes (9) is four, the positioning holes (9) are respectively arranged at the peripheral end angles of the fixture body (2), the number of the sheet pressing plates (4) is two, and the sheet pressing plates (4) and the rotating nuts (11) are fixedly connected with the supporting seats (12).

5. A holding device for a microhardness tester according to claim 1, wherein: the sheet pressing plates (4) are respectively fixed at two ends of the top of the screw rod lifting platform (10), and the jaws (5) are respectively fixed at two sides of the top of the screw rod lifting platform (10).

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