Small sample tensile fixture for Gleeble thermal simulation testing machine

Abstract

The utility model belongs to the field of thermal simulation physical tests, and relates to a small sample tensile fixture for a Gleeble thermal simulation testing machine. Comprising a sample with bulges at two ends, and two groups of clamping units for clamping the bulges at the two ends of the sample, the two groups of clamping units are the same in structure, and each group of clamping unit comprises two clamping blocks which are the same in shape and are used for clamping a sample and two copper fixtures which are the same in shape; each clamping block body comprises a clamping body and an extending part; a sample groove is formed in one end, far away from the extension part, of each clamping body. According to the small sample tensile fixture for the Gleeble thermal simulation testing machine, the sample can be conveniently clamped through the sample groove, so that the small sample can be stretched, the problem that the small sample cannot be stretched by utilizing the Gleeble thermal simulation testing machine is solved, the material size is reduced, and the experiment cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of thermal simulation physical test, and relates to a small sample tensile fixture for Gleeble thermal simulation testing machine. BACKGROUND

[0002] Tensile test is a key tool in material mechanics performance test, and has far-reaching and extensive significance for material science research. Some samples cannot be subjected to tensile test on a conventional testing machine fixture due to the influence of material size, and can only be subjected to metallographic examination and hardness test.

[0003] The required sample length of the thermal simulation testing machine is limited by the fixture, and the required sample length can only be 121mm. Therefore, many materials cannot obtain relevant data by using the tensile testing machine due to the influence of material size, and the elastic limit, elongation, elastic modulus, proportional limit, area reduction, tensile strength, yield point, yield strength and other tensile performance indexes of the corresponding materials cannot be determined. UTILITY MODEL CONTENT

[0004] In order to solve the above technical problems, the utility model provides a small sample tensile fixture for Gleeble thermal simulation testing machine, which solves the problem that the Gleeble thermal simulation testing machine cannot be used for tensile test of small samples, reduces the size of sample materials and reduces experimental cost.

[0005] In order to achieve the above technical purpose, the utility model provides the following technical scheme:

[0006] A small sample tensile fixture for Gleeble thermal simulation testing machine, comprising: a sample with protrusions at both ends, and two groups of clamping units for clamping the protrusions at both ends of the sample;

[0007] The two groups of clamping units are the same in structure, and each group of clamping units comprises two clamping blocks for clamping the sample and two copper fixtures which are the same in shape;

[0008] Each clamping block comprises a clamping body and an extension part; a sample groove is arranged at one end of each clamping body away from the extension part; the two sample grooves of the two clamping blocks in the same group of clamping units jointly define a space for accommodating the protrusion at one end of the sample and part of the sample body;

[0009] Each copper fixture is a four-prism with a right-angled trapezoidal longitudinal section, and a block groove is arranged at the center of the side surface of the right-angled waist of the copper fixture; the two block grooves of the two copper fixtures in the same group of clamping units jointly define a space for accommodating the clamping bodies of the two clamping blocks.

[0010] Further, the sample includes a sample body and two sample protrusions fixedly connected to two ends of the sample body respectively.

[0011] Further, the sample body and the sample protrusions are both cylindrical bodies, and the diameter of the sample protrusions is greater than that of the sample body.

[0012] Further, the clamping body of the clamping block is a semi-cylindrical body or a semi-circular table, the extension of the clamping block is a semi-cylindrical body, the bottom surfaces of the clamping body and the extension are located on the same plane, and the sample groove is arranged on the end of the plane away from the extension.

[0013] Further, when the clamping body of the clamping block is a semi-cylindrical body, the block groove on the copper fixture is a semi-cylindrical groove.

[0014] When the clamping body of the clamping block is a semi-circular table, the block groove on the copper fixture is a semi-circular table-shaped groove.

[0015] After assembly, at the corresponding cross section in the same position, the radius of the semi-circular cross section of the block groove = the semi-circular cross section of the clamping body + b; 0 ≤ b ≤ 0.5, unit: cm.

[0016] Further, in each clamping block, the sample groove includes a first semi-cylindrical groove and a second semi-cylindrical groove, the first semi-cylindrical groove is used for accommodating the sample protrusion at one end of the sample, and the second semi-cylindrical groove is used for accommodating part of the sample body at one end of the sample.

[0017] Further, the extension of the clamping block is arranged outside the copper fixture away from the sample.

[0018] The radius of the semi-circular cross section of the extension is greater than that of the clamping body, and the radius of the semi-circular cross section of the extension is greater than that of the block groove on the copper fixture.

[0019] Further, the overall length of the sample satisfies 20 ≤ sample length < 121 mm.

[0020] Further, the sample, the clamping block and the copper fixture are detachably connected.

[0021] The Gleeble thermal simulation testing machine small sample tensile clamp provided by the utility model has the advantages that:

[0022] The Gleeble thermal simulation testing machine small sample tensile clamp provided by the utility model can conveniently clamp the sample through the sample groove, realizes small sample tensile, solves the problem that the gleeble thermal simulation testing machine cannot be used for small sample tensile, reduces the size of the material, and reduces the experimental cost. Attached image description:

[0023] Figure 1 This is a schematic diagram of a small sample tensile fixture for a Gleeble thermal simulation testing machine according to an embodiment of the present invention;

[0024] Reference numerals: 1. Copper clamp; 2. Clamping block; 3. Sample. Detailed Implementation

[0025] The technical solution of this utility model will be further described below with reference to specific embodiments and accompanying drawings.

[0026] This embodiment provides a small specimen tensile fixture for a Gleeble thermal simulation testing machine, such as... Figure 1 As shown, it includes: a sample with protrusions at both ends, and two sets of clamping units for clamping the protrusions at both ends of the sample.

[0027] The two sets of clamping units have the same structure. Each set of clamping units includes two clamping blocks of the same shape for clamping the sample and two copper clamps of the same shape.

[0028] Each clamping block includes a clamping body and an extension; a sample groove is provided at one end of each clamping body away from the extension; the two sample grooves of the two clamping blocks in the same set of clamping units jointly define a space for accommodating a sample protrusion at one end and part of the sample body.

[0029] Each of the copper clamps is a quadrangular prism with a right-angled trapezoidal cross-section, and a block groove is provided at the center of the side where the right-angled waist of the copper clamp is located; the two block grooves of the two copper clamps in the same set of clamping units jointly define and form a clamping body for accommodating the two clamping blocks.

[0030] In this embodiment, the sample includes a sample body and two sample protrusions that are fixedly connected to both ends of the sample body.

[0031] In this embodiment, both the sample body and the sample protrusion are cylinders; and the diameter of the sample protrusion is larger than the diameter of the sample body.

[0032] In this embodiment, the clamping body of the clamping block is a semi-cylinder or a semi-frustum; the extension of the clamping block is a semi-cylinder; the bottom surfaces of the clamping body and the extension are located on the same plane; the sample groove is provided at the end of the plane away from the extension. When the clamping body is a semi-frustum, the radius of the semi-circular cross-section of the clamping body gradually increases from the sample groove to the extension; designing the clamping body as a semi-frustum with a gradually changing diameter is to adapt to the change of the right-angled trapezoidal cross-section of the copper clamp and ensure the strength of the copper clamp.

[0033] In the embodiment, when the clamping body of the clamping block is a semi-cylinder, the block groove on the copper fixture is a semi-cylinder groove; the size of the semi-cylinder groove is adapted to the size of the semi-cylinder of the clamping body.

[0034] When the clamping body of the clamping block is a semi-circular platform, the block groove on the copper fixture is a semi-circular platform groove.

[0035] After assembly, at the same position corresponding to the cross section, the radius of the semi-circular cross section of the block groove = the radius of the semi-circular cross section of the clamping body + b; 0≤b≤0.5, unit: cm.

[0036] In the embodiment, in each clamping block, the sample groove comprises a first semi-cylinder groove and a second semi-cylinder groove; the first semi-cylinder groove is used for accommodating a sample protrusion at one end of the sample; and the second semi-cylinder groove is used for accommodating a partial sample body at one end of the sample; the first semi-cylinder groove and the second semi-cylinder groove are in communication with each other; in the working state; the planes of the two clamping blocks are arranged in abutment; and the space defined by the two sample grooves on the planes of the two clamping blocks is used for accommodating the partial sample body and the protrusion at one end of the sample; wherein the space defined by the two sample grooves on the planes of the two clamping blocks and the partial sample body and the protrusion at one end of the sample are in conformity in shape, so that the sample can be prevented from being separated from the fixture during the experiment.

[0037] In the small sample tensile fixture for the Gleeble thermal simulation testing machine, the setting position of the sample groove on the clamping block in the middle can be adjusted according to the length of the sample, the processing is simple, the cost of manufacturing and processing special fixtures is reduced, the test cost is saved, and the whole operation process is simple and convenient; and if necessary, the fixture can be used for static CCT experiment.

[0038] In the embodiment, the extension part of the clamping block is arranged on the outer portion of the copper fixture away from one end of the sample; and the extension part is used for preventing relative movement between the clamping block and the copper fixture during work.

[0039] The radius of the semi-circular cross section of the extension part is greater than the radius of the semi-circular cross section of the clamping body, and the radius of the semi-circular cross section of the extension part is greater than the radius of the semi-circular cross section of the block groove on the copper fixture.

[0040] In the embodiment, the two copper fixtures in the same set of fixture units are combined to form a wedge-shaped clamping block; the size of the wedge-shaped clamping block is adapted to the shape of the corresponding clamping groove of the Gleeble thermal simulation testing machine; and after assembly, the wedge-shaped clamping block is tightly matched with the corresponding clamping groove of the Gleeble thermal simulation testing machine.

[0041] In the embodiment, the sample, the clamping block and the copper fixture are detachably connected.

[0042] The Gleeble thermal simulation testing machine small sample tensile fixture provided by the utility model is assembled, the protrusions at two ends of the sample are fixed in the sample grooves of the corresponding two clamping blocks respectively, the two clamping blocks are arranged in the block grooves in the middle of the two copper fixtures, and the extension of the clamping block is arranged at the outer end of the copper fixture, so that the clamping block is prevented from being separated from the copper fixture during testing.

[0043] The Gleeble thermal simulation testing machine small sample tensile fixture provided by the utility model is suitable for rod-shaped samples with a length of less than 121 mm of the original Gleeble thermal simulation testing machine, the minimum sample length can reach 20 mm, and the cylindrical sample is convenient to process and simple to process.

[0044] The use method of the Gleeble thermal simulation testing machine small sample tensile fixture in the embodiment is as follows: after the sample is processed and formed, a thermocouple is welded at the middle position of the sample, the protrusions at two ends of the sample are clamped into the sample grooves, the copper fixture is fixed to the corresponding position of the Gleeble thermal simulation testing machine, the chamber stroke is adjusted to a suitable position by moving the hydraulic pressure, the whole fixture is placed in the chamber, the thermocouple channel is assembled, and the program is set and run.

[0045] Finally, it should be noted that the above description is only preferred embodiments of the utility model, and is not used to limit the utility model, and for ordinary skilled persons in the art, the foregoing described technical solutions can still be modified or deformed and improved, and these all belong to the protection scope of the utility model.

Claims

1. A small specimen tensile jig for a Gleeble thermal mechanical simulator, characterized by, The test sample comprises a test sample body and two test sample protrusions respectively fixedly connected to two ends of the test sample body. The test sample body and the test sample protrusions are both cylindrical bodies, and the diameter of the test sample protrusions is greater than the diameter of the test sample body. The clamping body of the clamping block is a semi-cylindrical body or a semi-circular truncated cone, and the extension part of the clamping block is a semi-cylindrical body. When the clamping body of the clamping block is a semi-cylindrical body, the block recess on the copper fixture is a semi-cylindrical recess. When the clamping body of the clamping block is a semi-circular truncated cone, the block recess on the copper fixture is a semi-circular truncated cone-shaped recess.

2. The small specimen tensile grip for a Gleeble thermal mechanical simulator as defined in claim 1, wherein After assembly, at the corresponding cross section at the same position, the radius of the semi-circular cross section of the block recess = the semi-circular cross section of the clamping body + b; 0≤b≤0.5, unit: cm.

3. The small specimen tensioning jig for a Gleeble thermal mechanical simulator according to claim 2, characterized by In each clamping block, the test sample recess comprises a first semi-cylindrical recess and a second semi-cylindrical recess, the first semi-cylindrical recess is used for accommodating the test sample protrusion at one end of the test sample, and the second semi-cylindrical recess is used for accommodating part of the test sample body at one end of the test sample.

4. The small specimen tensioning jig for a Gleeble thermal mechanical simulator according to claim 1, characterized by The extension part of the clamping block is arranged outside the copper fixture away from the test sample.

5. The small specimen tensioning jig for a Gleeble thermal mechanical simulator according to claim 4, characterized by The radius of the semi-circular cross section of the extension part is greater than the radius of the semi-circular cross section of the clamping body, and the radius of the semi-circular cross section of the extension part is greater than the radius of the semi-circular cross section of the block recess on the copper fixture. The overall length of the test sample satisfies: 20≤test sample length<121mm. The test sample, the clamping block and the copper fixture are detachably connected.

6. The small specimen tensioning jig for a Gleeble thermal mechanical simulator according to claim 4, characterized by ​ 7. The small specimen tensioning jig for a Gleeble thermal mechanical simulator according to claim 4, characterized by ​ ​ 8. The small specimen tensioning jig for a Gleeble thermal mechanical simulator according to claim 1, characterized by, ​ 9. The small specimen tensioning jig for a Gleeble thermal mechanical simulator according to claim 1, characterized by ​

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