CN206248455U - A kind of frock clamp for Vickers - Google Patents

Abstract

The utility model discloses a tooling fixture for a Vickers hardness tester, which comprises a body with two parallel and oppositely arranged prisms, and the body has an axisymmetric structure, and a threaded hole is provided at the center of the prisms. A first threaded rod is installed in the threaded hole, the first threaded rod passes through the abutment and is slidably connected to a first compactor at one end close to the center of the body, and the other end of the first threaded rod is provided with a screw for rotating the first threaded rod. The first handle; the lower surface of the body is integrally connected with four bosses arranged oppositely in pairs, and the bosses are equipped with a fastening device for fixing the body on the hardness test platform. The utility model is provided with a first compactor with a dovetail slide rail, which can realize the compaction and fixation of any shape of the workpiece to be tested, which meets the hardness test, and solves the problems caused by the fixation of irregular workpieces when the hardness test is performed. The problem of instability is prone to bias problems, resulting in a large deviation between the measured hardness and the actual hardness.

Description

A fixture for Vickers hardness tester

technical field

The utility model relates to the field of hardness tester fixtures, in particular to a tooling fixture for Vickers hardness testers.

Background technique

The Vickers hardness tester is one of the existing instruments for measuring hardness. The existing Vickers hardness tester usually places the sample to be tested directly on the hardness tester table and applies a certain pressure for a certain period of time. By measuring the length of the diagonal of the indentation, the corresponding hardness is calculated by the formula. However, in actual measurement, some irregular parts are often encountered to be measured. Due to the irregular shape of the measured workpiece, it cannot be placed on the test bench stably. During the pressure measurement process, it is easy to be skewed, eccentric, or even partially spherical. Or spheroidal parts cannot be directly measured at all. The solution usually taken now is to measure by making a rectangular sample. Due to the cumbersome preparation of the sample and the need for heat treatment after the production, the hardness error will be caused by the difference in the processing parameters during the heat treatment process, and the measured hardness value will also be distorted.

Utility model content

The purpose of this utility model is to provide a tooling fixture for Vickers hardness tester, which is used to solve the problem existing in the prior art that when the Vickers hardness tester is performing pressure test hardness, due to the shape of the workpiece being tested is not Rules, such as balls and deformed workpieces cannot be stably placed on the test bench, resulting in the fact that the tested workpiece and the test point of the Vickers hardness tester cannot be guaranteed to be vertical, which affects the test accuracy.

The utility model is realized through the following technical solutions:

A tooling fixture for a Vickers hardness tester, comprising a body with two parallel and opposite prisms and the body has an axisymmetric structure, a threaded hole is provided at the center of the prisms, and a screw hole is installed in the threaded hole A first screw rod, the first screw rod runs through the edge platform and is slidably connected with a first compactor at one end close to the center of the body, and the other end of the first screw rod is provided with a first handle for rotating the first screw rod; The lower surface of the main body is integrally connected with four bosses arranged oppositely in pairs, and a fastening device for fixing the main body on the hardness test platform is installed on the bosses.

In order to further solve the technical problem and realize the technical effect of the utility model, the fastening device includes a second threaded rod that passes through the boss and is threadedly connected with the boss, and one end of the second threaded rod near the center of the body is slidably connected There is a second compactor, and the other end of the second screw rod is provided with a second handle for rotating the second screw rod. On the basis of the above structure, it is further preferred that the thread of the second screw rod is double-row fine thread, and the purpose of setting the double-row fine thread is to perform better fastening. The two screw rods are fastened separately, the main body can be firmly fixed on the test platform of the hardness tester, and the adjustment of the relative position between the utility model and the test platform of the hardness tester is realized by adjusting the fastening device in different directions, so as to avoid irregularities When the workpiece is tested, there are eccentricity, bias, etc. that affect the test accuracy.

In order to further solve the technical problem and realize the technical effect of the utility model, the second compactor is arranged in an arc shape, and the side close to the second screw rod is a support layer made of metal material, and the support layer The layer is provided with a non-slip rubber layer. Existing test benches for Vickers hardness testers are usually cylindrical metal test benches, and the second compactor combined with a support layer made of metal materials and a non-slip rubber layer can take into account both fastening and non-slip performance. purpose, and avoid scratches and damages to the hardness tester by the rigid fixing method.

In order to further solve the technical problem, realize the technical effect of the utility model, and prevent the first compactor from being deflected due to the irregular shape of the workpiece in the process of fixing the workpiece due to the uneven force of the first compactor during the pressing process problem, two parallel dovetail slide rails are arranged on the contact surface between the body and the first compactor, the length direction of the dovetail slide rails is perpendicular to the length direction of the first compactor, and the first compactor A dovetail groove for accommodating the dovetail slide rail is arranged on the top. Since in the actual measurement process, the shape of the measured workpiece is often not a symmetrical regular structure, the first compactors located on both sides are usually stressed during the fixing and pressing process of the irregularly shaped measured workpiece. If it does not correspond, there will be deviation and skew, which will affect the clamping force of the workpiece. By setting two parallel to each other and perpendicular to the movement direction of the first clamp, it can effectively ensure that the first clamp always moves horizontally. To prevent deflection, when pressing any shape of the workpiece to be tested, it can avoid the problems of eccentricity, deflection, and uneven force affecting the accuracy of hardness testing.

In order to further solve the technical problem and realize the technical effect of the utility model, the dovetail slide rail is connected to the body through countersunk screws. The purpose of using countersunk head screws to install dovetail slide rails is to facilitate disassembly. At the same time, connecting dovetail slide rails with countersunk head screws will not cause interference fit between dovetail slide rails and the first compactor, ensuring that the first compactor is relatively Normal sliding of the slide rail.

Compared with the prior art, the utility model has the following advantages and beneficial effects:

(1) The utility model is equipped with a first compactor with a dovetail slide rail, which can realize the compaction and fixation of any shape of the workpiece to be tested, satisfying the hardness test, and solving the problem of the existing Vickers hardness tester. When testing the hardness of irregular workpieces, the bias problem is likely to occur due to the problem of loose fixation, resulting in a large deviation between the measured hardness and the actual hardness.

(2) The utility model is provided with a fastening device for fixing the utility model on the lower surface of the body, and is distributed in four relative directions, and the fastening force and size of the fastening device can be adjusted by adjusting the second screw rod. It can be adjusted to adapt to hardness test benches of different sizes, and has a wide range of applications.

Description of drawings

Fig. 1 is the top view of the utility model;

Fig. 2 is a cross-sectional structure diagram along section line A-A in Fig. 1;

Fig. 3 is a cross-sectional structure diagram along section line B-B in Fig. 1;

Fig. 4 is the bottom view of Fig. 1;

Among them, 1-body; 2-first compactor; 3-first screw rod; 4-first handle; 5-dovetail slide rail; 6-boss; 7-second compactor; 8-second wire Rod; 9-second handle; 10-dovetail groove.

detailed description

The utility model will be further described in detail below in conjunction with the examples, but the implementation of the utility model is not limited thereto.

Example 1:

As shown in Figures 1-4, a tooling fixture for a Vickers hardness tester includes a body 1 with two parallel and opposite prisms and the body 1 has an axisymmetric structure, and the central position of the prisms is set There is a threaded hole, and a first screw rod 3 is installed in the threaded hole. The first screw rod 3 runs through the abutment and is slidably connected to the first compactor 2 near the center of the body 1. The other end of the first screw rod 3 One end is provided with a first handle 4 for rotating the first screw mandrel 3; the lower surface of the body 1 is integrally connected with four bosses 6 oppositely arranged in pairs, and the bosses 6 are mounted with a handle for turning the body 1 A fastening device fixed on the test bench of the hardness tester.

How it works and how to use it:

When the utility model needs to be installed on the Vickers hardness tester, first loosen the fastening device installed on the lower surface of the body 1, insert the upper end surface of the hardness tester test table between the four fastening devices, adjust and lock in turn The fastening device ensures that the upper end surface of the hardness tester is in flat contact with the lower surface of the body 1 and locks all the fastening devices. If the distances between the two oppositely arranged fastening devices relative to the hardness tester are not the same in the locked state, fine-tune them until the two oppositely arranged fastening devices are still in a symmetrical state in the locked state, which means The center of the main body 1 is completely aligned with the center of the hardness test bench.

Place the workpiece to be tested on the body 1, turn the first handle 4, the first handle 4 drives the first screw rod 3 to rotate, the first screw rod 3 pushes the first compactor 2 to move towards the workpiece to be tested, when both sides After all the first compactors 2 are in contact with the tested workpiece, they continue to apply pressure to the tested workpiece at the same time and slowly, so that the tested workpiece is firmly fixed on the body 1 and waits for the hardness test.

Beneficial effects: Since the center of the body 1 is aligned with the test table of the hardness tester, the workpiece is subjected to vertical downward pressure during the pressurization process of the hardness tester, and is directly and rigidly transmitted to the test table of the hardness tester through the body 1, effectively It prevents the phenomenon that the measured data is distorted due to uneven force caused by eccentricity; furthermore, since the first clamper 2 arranged oppositely fixes the workpiece under test, it can effectively fix the workpiece under test, It avoids deflection and avoids the technical problem that the existing Vickers hardness tester cannot measure irregular workpieces. By adopting the utility model, the irregular workpiece can be directly tested without separately making a sample of the same material for testing, which is convenient, fast and efficient.

Example 2:

In order to further solve the technical problem and realize the technical effect of the present utility model, on the basis of Embodiment 1, in conjunction with the accompanying drawings 1-4, the fastening device includes penetrating through the boss 6 and connecting with the boss 6 A second threaded screw 8, one end of the second screw 8 close to the center of the body 1 is slidably connected with a second compactor 7, and the other end of the second screw 8 is provided with a second handle for rotating the second screw 8 9. On the basis of the above structure, it is further preferred that the thread of the second screw mandrel 8 is a double row of fine threads, and the purpose of setting the double rows of fine threads is to perform better fastening. The second screw rods 8 are fastened separately, the main body 1 can be firmly fixed on the test platform of the hardness tester, and the adjustment of the relative position of the utility model and the test platform of the hardness tester can be realized by adjusting the fastening devices in different directions, so as to avoid When testing irregular workpieces, eccentricity, bias, etc. affect the test accuracy.

In order to further solve technical problems and realize the technical effect of the utility model, the second compactor 7 is arranged in an arc shape, and the side close to the second screw rod 8 is a support layer made of metal material, so The support layer is provided with a non-slip rubber layer. The test benches of the existing Vickers hardness testers are usually cylindrical metal test benches, and the second compactor 7 combined with a support layer made of metal materials and a non-slip rubber layer can take into account both fastening and anti-slip purpose, and avoid scratches and damages to the hardness tester by the rigid fixing method.

In order to further solve the technical problem and realize the technical effect of the utility model, it is possible to prevent the first compactor 2 from being unevenly stressed during the pressing process due to the irregular shape of the workpiece during the fixing process of the workpiece under test. To solve the problem of deflection, two parallel dovetail slide rails 5 are arranged on the contact surface between the body 1 and the first compactor 2, and the length direction of the dovetail slide rails 5 is perpendicular to the length direction of the first compactor 2 It is provided that the first compactor 2 is provided with a dovetail groove 10 for accommodating the dovetail slide rail 5 . Since in the actual measurement process, the shape of the measured workpiece is often not a symmetrical regular structure, the first compactor 2 located on both sides is usually stressed during the fixing and pressing process of the irregularly shaped measured workpiece. If the points do not correspond, there will be deflection and skewing, which will affect the clamping force of the workpiece. By setting two parallel to each other and perpendicular to the movement direction of the first compactor 2, it can effectively ensure that the first compactor 2 is always Horizontal movement prevents deflection, and can avoid eccentricity, deflection, and uneven force affecting the accuracy of hardness testing when pressing workpieces of any shape.

In order to further solve the technical problem and realize the technical effect of the utility model, the dovetail slide rail 5 is connected to the body 1 through countersunk screws. The purpose of installing dovetail slide rail 5 with countersunk head screws is to facilitate disassembly, and at the same time connecting dovetail slide rail 5 with countersunk head screws will not cause interference fit between dovetail slide rail 5 and first compactor 2, ensuring the first compaction The normal sliding of the device 2 relative to the dovetail slide rail 5.

The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Any simple modification or equivalent change made to the above embodiments according to the technical essence of the utility model falls within the scope of the present utility model. Within the protection scope of the present utility model.

Claims (5)

1. A fixture for a Vickers hardness tester, comprising a body (1) with two parallel and oppositely arranged prisms and the body (1) has an axisymmetric structure, characterized in that: the central position of the prisms A threaded hole is provided, and a first threaded rod (3) is installed in the threaded hole, and the first threaded rod (3) runs through the abutment and is slidably connected with a first compactor (2) at one end close to the center of the body (1). ), the other end of the first screw rod (3) is provided with a first handle (4) for rotating the first screw rod (3); the lower surface of the body (1) is integrally connected with four pairs of The boss (6) is equipped with a fastening device for fixing the body (1) on the hardness tester. 2. A fixture for a Vickers hardness tester according to claim 1, characterized in that the fastening device includes a second screw threaded through the boss (6) and connected with the boss (6). Two screw rods (8), one end of the second screw rod (8) close to the center of the body (1) is slidably connected with a second compactor (7), and the other end of the second screw rod (8) is provided with a second screw for rotating The second handle (9) of the rod (8). 3. A fixture for a Vickers hardness tester according to claim 2, characterized in that the second compactor (7) is arranged in an arc shape and is close to the second screw rod (8) One side is a support layer made of metal material, and a non-slip rubber layer is arranged on the support layer. 4. The fixture for Vickers hardness tester according to claim 1, characterized in that two parallel The dovetail slide rail (5), the length direction of the dovetail slide rail (5) is perpendicular to the length direction of the first compactor (2), and the first compactor (2) is provided with a (5) dovetail groove (10). 5 . The fixture for Vickers hardness tester according to claim 4 , characterized in that, the dovetail slide rail ( 5 ) is connected to the body ( 1 ) through countersunk screws. 5 .