CN206855251U - A kind of sheet tensile sample side grinding clamp - Google Patents

Abstract

The utility model discloses a side grinding fixture for sheet tensile samples, which comprises an upper fixture, a lower fixture, studs, nuts and a limit plate, the lower fixture adopts a dumbbell-shaped structure, and the lower ends of two studs are fixed and installed On the top surface of the lower fixture, the bottom of the limit plate is fixedly installed on the top surface of the lower fixture, the upper fixture is set on the two studs, a tensile sample is installed between the upper fixture and the lower fixture, and two nuts It is installed on the upper end of the stud through threaded connection and the bottom surface of the nut is on the top surface of the upper fixture. The upper fixture is provided with a "U"-shaped notch, and the upper end of the limiting plate is stuck in the "U"-shaped notch on the upper fixture. The utility model avoids bending and deformation of the sample caused by continuously applying pressure to the rod part of the stretched sample during the grinding process, the size of the span part is inconsistent, rounded corners appear, or the width is uneven, which affects the measurement of the experimental data; The device has wide applicability, low manufacturing cost, simple operation and high efficiency.

Description

A Side Grinding Fixture for Sheet Tensile Samples

technical field

The utility model belongs to the technical field of mechanical property detection, and in particular relates to a side grinding fixture for a sheet-shaped tensile sample.

Background technique

Tensile test refers to a test method for determining the mechanical properties of materials when an axial tensile load is applied to a tensile specimen. The tensile sample is the basic experimental material of this test, and the surface of the sample (especially the rod of the tensile sample) needs to be ground and polished before the mechanical performance test. When grinding the stem of some thinner tensile specimens, constant pressure is applied to the trimmed edges of the two ends, which will cause the specimen to bend and deform. If the force is not uniform, it will cause the shape and axial transverse deformation of the material The cross-sectional area changes, which will have a greater impact on the tensile performance test results. If the sample is polished one by one, not only chamfering and uneven width are prone to occur, which will affect the accuracy of the mechanical property data, but also increase the workload of the experimenters and affect the progress of the experiment. If many pieces of samples are fixed by manual method, the positions of some samples need to be corrected many times, which will greatly reduce the work efficiency.

Utility model content

The technical problem to be solved by the utility model is aimed at the above-mentioned deficiencies in the prior art, and it provides a kind of sheet tensile sample fixture, promptly places tensile sample between the upper and lower clamps, according to the quantity of tensile sample, Adjust the nut to control the front and rear distance of the upper and lower clamps; use the limit plate perpendicular to the lower clamp to constrain the position of the tensile sample, at the same time, the device also ensures the parallelism of the upper and lower clamps, so as to better control a certain number of The tensile sample is polished, and the rod of the tensile sample is smooth and continuous after treatment, which ensures the accuracy of the tensile test data.

For realizing above-mentioned technical purpose, the technical scheme that the utility model takes is:

A side grinding fixture for a sheet-like tensile sample, which includes an upper fixture, a lower fixture, studs, nuts and a limit plate, the lower fixture adopts a dumbbell-shaped structure, and the lower ends of the two studs are fixed and installed On the top surface of the lower clamp, the bottom of the limiting plate is fixedly installed on the top surface of the lower clamp, the upper clamp is sleeved on the two studs, and the upper clamp and the lower clamp are installed There is a tensile sample, the two nuts are installed on the upper end of the stud through threaded connection and the bottom surface of the nut is on the top surface of the upper fixture, and the upper fixture is provided with a "U" shaped notch, the The upper end of the limiting plate is stuck in the "U"-shaped notch on the upper fixture.

In order to optimize the above technical solutions, the specific measures taken also include:

The above-mentioned upper clamp adopts a dumbbell-shaped structure.

The distance between the above-mentioned upper clamp and the lower clamp can be adjusted.

Both the above-mentioned upper clamp and the lower clamp are made of cemented carbide.

Place the upper and lower clamps of the side grinding fixture of the sheet-shaped tensile sample on the horizontal table. By adjusting the front and rear distances of the upper and lower clamps, the position of the tensile sample is restrained and fixed, so as to adjust the position of the rod. Grinding; the position of the tensile sample is constrained by the limit plate perpendicular to the lower clamp and the parallelism of the upper and lower clamps is ensured. The device of the utility model places the tensile sample through the studs, nuts and limit plates, so as to avoid the bending and deformation of the sample due to the continuous application of pressure to the rod of the tensile sample during the grinding process, the inconsistent size of the span part, and the occurrence of roundness. Angle, or uneven width occurs, which affects the determination of experimental data. The device has wide applicability, low manufacturing cost, simple operation and high efficiency.

The utility model has the advantages of the following points: the position of the tensile sample is constrained by the limiting plate perpendicular to the lower clamp and the parallelism of the upper and lower clamps is ensured. Adjust the front and rear distances of the upper and lower clamps according to the number of tensile samples to be processed, and apply pressure in parallel to ensure that the spatial position of the tensile samples is fixed. During the grinding process, chamfering, bending deformation, and uneven width are not easy to occur. , which increases the credibility of the test results of tensile properties; the operation is simple, the work efficiency is greatly improved, and some thinner tensile samples can also be ground and polished, and the applicability is very wide; the upper clamp of the tensile sample fixture It is thicker than the lower clamp, and the material of the upper and lower clamps is hard alloy, which has good wear resistance and long service life of the clamp; it is simple to manufacture and low in cost.

Description of drawings

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

The reference signs therein are: upper clamp 1, lower clamp 2, stud 3, nut 4, limit plate 5, tensile sample 6.

detailed description

Below in conjunction with accompanying drawing, the specific embodiment of the utility model is further described:

A side grinding fixture for a sheet-like tensile sample, which includes an upper fixture 1, a lower fixture 2, a stud 3, a nut 4 and a limit plate 5, the lower fixture 2 adopts a dumbbell-shaped structure, and the two The lower end of the stud 3 is fixedly installed on the top surface of the lower clamp 2, the bottom of the limiting plate 5 is fixedly installed on the top surface of the lower clamp 2, and the upper clamp 1 is set on the two studs 3 , a tensile sample 6 is installed between the upper clamp 1 and the lower clamp 2, the two nuts 4 are installed on the upper end of the stud 3 through threaded connection and the bottom surface of the nut 4 is on the top surface of the upper clamp 1 Above, the upper fixture 1 is provided with a "U"-shaped notch, and the upper end of the limiting plate 5 is stuck in the "U"-shaped notch on the upper fixture 1.

In the embodiment, the upper clamp 1 adopts a dumbbell-shaped structure.

In the embodiment, the distance between the upper clamp 1 and the lower clamp 2 can be adjusted.

In the embodiment, both the upper clamp 1 and the lower clamp 2 are made of cemented carbide.

When working, first place the upper fixture 1 and the lower fixture 2 of the tensile sample on the horizontal table, unscrew the nut 4, initially adjust the front and rear distances of the upper fixture 1 and the lower fixture 2, and place a certain number of tensile samples 6 is placed between the upper fixture 1 and the lower fixture 2, slightly adjust the position of the tensile sample so that it is close to one side of the limit plate 5, and after confirming that the tensile sample 6 is neatly stacked, move the upper fixture 1, Make it close to the tensile sample 6, and then tighten the nut 4. After the tensile sample 6 is successfully fixed, the rod of the tensile sample can be polished.

The above are only preferred implementations of the utility model, and the scope of protection of the utility model is not limited to the above-mentioned embodiments, and all technical solutions under the thinking of the utility model all belong to the scope of protection of the utility model. It should be pointed out that for those of ordinary skill in the art, some improvements and modifications without departing from the principle of the utility model should be regarded as the protection scope of the utility model.

Claims (4)

1. A kind of 1. sheet tensile sample side grinding clamp, it is characterised in that：Including upper fixture (1), lower clamp (2), stud (3), nut (4) and limiting plate (5), described lower clamp (2) use dumbbell shape structure, and stud (3) lower end described in two leads to To cross and be fixedly mounted on the top surface of lower clamp (2), described limiting plate (5) bottom is fixedly mounted on the top surface of lower clamp (2), Described upper fixture (1) is enclosed on the stud described in two (3), and drawing is provided between described upper fixture (1) and lower clamp (2) Sample (6) is stretched, the nut (4) described in two is connected through a screw thread to be withstood on installed in the upper end of stud (3) and nut (4) bottom surface On the top surface of fixture (1), described upper fixture (1) is provided with " u "-shaped notch, and described limiting plate (5) upper end is stuck in upper fixture (1) "u"-shaped groove on is intraoral.
2. A kind of 2. sheet tensile sample side grinding clamp according to claim 1, it is characterised in that：Described upper fixture (1) dumbbell shape structure is used.
3. A kind of 3. sheet tensile sample side grinding clamp according to claim 1, it is characterised in that：Described upper fixture (1) can be adjusted with the distance between lower clamp (2).
4. A kind of 4. sheet tensile sample side grinding clamp according to claim 1, it is characterised in that：Described upper fixture (1) and lower clamp (2) is made using hard alloy.