Air-cooled clamp for plate high-temperature bending vibration test

Abstract

The utility model discloses an air-cooled clamp for a high-temperature bending vibration fatigue test of a plate. The air-cooled clamp comprises a vibration table and a cantilever support fixed on the vibration table, the cantilever support is a square cylinder, a sample groove is formed in one side face of the upper portion of the cantilever support, and through circular air cooling through holes are formed in the positions, corresponding to the sample groove, of the two adjacent side faces. A jacking clamping block used for fixing a plate sample is arranged in the sample groove, and a circular through hole is formed in the position, corresponding to the circular air cooling through hole, of the jacking clamping block; two threaded holes are formed in the positions, corresponding to the sample grooves, of the top of the cantilever support, and high-temperature screws are arranged and used for tightly jacking and fixing the tightly jacking clamping blocks. Compared with the existing plate bending vibration clamp, the air-cooled clamp disclosed by the utility model is higher in high-temperature resistance and longer in test duration in a high-temperature bending vibration test, the high-temperature bending vibration test efficiency of the plate is improved, and the influence of human error factors is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of vibration fatigue test fixtures, in particular to an air-cooled fixture used for high-temperature bending vibration fatigue tests of plates. Background Art

[0002] In the high temperature bending vibration fatigue test of the plate, the specimen and the fixture are rigidly connected and the test is carried out on a vibration table. The test frequency ranges from tens of hertz to several thousand hertz, the test temperature can reach 400℃~800℃, the test cycle is long, and the number of cycles can reach 10 8 .

[0003] Since existing plate bending vibration fixtures generally only consider test requirements at room temperature, under the conditions of high-temperature bending vibration tests, the rigid connection method has a faster heat transfer speed. After the test temperature rises, when the sample transfers heat to the connection with the fixture, long-period fatigue testing is prone to high-temperature adhesion, and the temperature is further transmitted to the vibration table, which is likely to cause damage to the test equipment. At present, there is no better solution to the above-mentioned phenomenon in the high-temperature bending vibration test of plates. Only temperature monitoring and manual intermittent testing can be carried out. The test time is long and the efficiency is low, which is prone to quality problems caused by operator fatigue errors. Therefore, it is necessary to design a corresponding fixture based on the characteristics of high-temperature bending vibration tests, so that this type of test can be carried out uninterruptedly, reduce the impact of human error factors, and improve test efficiency. Utility Model Content

[0004] The utility model aims to provide an air-cooled fixture, which can improve the test efficiency of the high-temperature bending vibration test of the plate.

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

[0006] An air-cooled fixture for high-temperature bending vibration fatigue test of a plate, comprising a vibration table and a cantilever support fixed on the vibration table, wherein:

[0007] The cantilever support is a square column, a sample slot is provided on one side of the upper part thereof, and through air cooling holes are provided on two adjacent sides at positions corresponding to the sample slot;

[0008] The sample groove is provided with a clamping block for fixing the plate sample, and the clamping block is provided with a through hole at a position corresponding to the air-cooling through hole, thereby forming an upper air-cooling channel together with the air-cooling through hole;

[0009] Two through threaded holes are provided at the top of the cantilever support at positions corresponding to the sample slots, and are provided with high-temperature screws for tightening and fixing the tightening clamp.

[0010] According to the utility model, the shape of the clamping block is adapted to the sample slot, so that the clamping block can be just accommodated in the sample slot.

[0011] Preferably, the clamping block is in the shape of a square block, and its short side is adapted to the width of the sample slot.

[0012] Furthermore, two long strip-shaped layout grooves are respectively opened at the bottom of the clamping block along the long side direction, and the width of the two strip-shaped layout grooves is matched with the short side of the plate sample so that the plate sample can be just accommodated in the layout grooves.

[0013] According to the utility model, a plurality of long strip air-cooling through holes are evenly arranged on the side surface of the cantilever support below the sample slot.

[0014] Furthermore, the plurality of long strip air-cooling through holes are alternately arranged on adjacent side surfaces of the cantilever support, so that two adjacent side surfaces alternately form air-cooling channels, and two adjacent air-cooling channels are cross-intersected and do not interfere with each other.

[0015] The utility model has the following beneficial effects:

[0016] The utility model aims to solve the problem that the existing plate bending vibration fixture has low efficiency in high-temperature bending vibration tests and is prone to quality problems caused by operator fatigue errors. According to the structural characteristics of the test piece, a new air-cooled fixture is designed, which enables this type of test to be carried out uninterruptedly, improves the efficiency of the plate high-temperature bending vibration test, and reduces the impact of human error factors. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The utility model is a schematic diagram of the assembly of the air-cooling fixture for high-temperature bending vibration fatigue test of plate and the position of the air-cooling channel.

[0018] Figure 2 for Figure 1 An enlarged schematic diagram of the middle clamping block.

[0019] Description of the figure number:

[0020] 1-vibration table; 2-cantilever support; 21-high temperature screw; 22-threaded hole; 23-tightening clamp; 24-plate sample; 25-sample slot; 26-circular air-cooling through hole; 27-long strip air-cooling through hole; 231-circular through hole; 232-lofting slot. DETAILED DESCRIPTION

[0021] The following is a clear and complete description of the technical solution of the utility model with specific embodiments in conjunction with the accompanying drawings. It should be understood that the described embodiments are only used to illustrate the utility model, rather than to limit the scope of the utility model.

[0022] like Figure 1 and Figure 2 As shown, the air-cooled fixture for high-temperature vibration fatigue test of plate of the utility model comprises a vibration table 1 and a cantilever support 2 fixed on the vibration table 1 by a fixing member, such as a bolt, and the two are rigidly connected, wherein:

[0023] The cantilever support 2 is a square cylinder, and a sample groove 25 is provided on one side of its upper part, and a through circular air-cooling through hole 26 is provided on two adjacent sides at positions corresponding to the sample groove 25; a clamping block 23 for fixing a plate sample 24 is arranged in the sample groove 25, and a circular through hole 231 is provided in the clamping block 23 at a position corresponding to the circular air-cooling through hole 26, thereby forming an upper air-cooling channel together with the circular air-cooling through hole 26; two through threaded holes 22 are provided at the top of the cantilever support 2 at a position corresponding to the sample groove 25, and a high-temperature screw 21 is provided for tightening and fixing the clamping block 23.

[0024] Furthermore, the shape of the top clamp block 23 is adapted to the sample slot 25 so that the top clamp block 23 can be accommodated in the sample slot 25; in this embodiment, the top clamp block 23 is in the shape of a square block, and its short side is adapted to the width of the sample slot 25; further, two long strip-shaped layout grooves 232 are respectively opened at the bottom of the top clamp block 23 along the long side direction, and their widths are adapted to the short sides of the plate sample 24.

[0025] In this way, when it is necessary to conduct a high-temperature vibration fatigue test on the plate, the clamping block 23 is inserted close to the bottom surface of the sample groove 25, and then the plate sample 24 is inserted along the bottom layout groove 232 of the clamping block 23 according to the depth required for the test clamping, and the circular through hole 231 of the clamping block 23 is aligned with the circular air-cooling through hole 26 to form an air-cooling channel, and then the high-temperature screw 21 is tightened to press the clamping block 23 downward, thereby clamping and fixing the plate sample 24.

[0026] Furthermore, below the sample slot 25, a plurality of long strip air-cooling holes 27 are evenly opened on the side of the cantilever support 2, and the plurality of long strip air-cooling holes 27 are alternately arranged on adjacent sides of the cantilever support 2, so that two adjacent sides alternately form air-cooling channels, and the two adjacent air-cooling channels are cross-intersected and do not interfere with each other.

[0027] In this embodiment, the air cooling channel formed by aligning the through hole of the clamping block 23 and the circular air cooling through hole 26 mainly acts on the sample clamping area to prevent the clamped plate sample 24, the clamping block 23 and the sample slot 25 from sticking together due to high temperature during the test after the high temperature screw 21 is tightened; the air cooling channel formed by the long strip air cooling through hole 27 acts to dissipate heat from the square column of the cantilever support 2 during the test to prevent heat from being conducted from the sample clamping area to the vibration table 1. The control of the ventilation volume in the air cooling channel should be artificially controlled according to the heat loss of the heated clamping part of the sample, for example, a knob for adjusting the air volume is set on the ventilation hose connected to the outside, so as to control the temperature gradient of the sample in a relatively reasonable range.

[0028] Although the embodiments of the present invention are described above in conjunction with the accompanying drawings, the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present invention and the claims, which all belong to the protection scope of the present invention.

Claims

1. An air-cooled fixture for high-temperature bending vibration test of a plate, comprising a vibration table and a cantilever support fixed on the vibration table, characterized in that: The cantilever support is a square column, a sample slot is provided on one side of the upper part thereof, and through air cooling holes are provided on two adjacent sides at positions corresponding to the sample slot; The sample groove is provided with a clamping block for fixing the plate sample, and the clamping block is provided with a through hole at a position corresponding to the air-cooling through hole, thereby forming an upper air-cooling channel together with the air-cooling through hole; Two through threaded holes are provided at the top of the cantilever support at positions corresponding to the sample slots, and are provided with high-temperature screws for tightening and fixing the tightening clamp.

2. The air-cooled fixture for high-temperature bending vibration test of plate material according to claim 1, characterized in that: The shape of the clamping block is adapted to the sample slot, so that the clamping block can be just accommodated in the sample slot.

3. The air-cooled fixture for high-temperature bending vibration test of plate material according to claim 2, characterized in that: The clamping block is in the shape of a square block, and its short side is adapted to the width of the sample slot.

4. The air-cooled fixture for high-temperature bending vibration test of plate material according to claim 1, characterized in that: The bottom of the clamping block is provided with two long strip-shaped layout grooves along the long side direction, and the width of the long strip-shaped layout grooves is matched with the short side of the plate sample.

5. The air-cooled fixture for high-temperature bending vibration test of plate material according to claim 1, characterized in that: Below the sample slot, a plurality of long strip air-cooling through holes are evenly arranged on the side surface of the cantilever support.

6. The air-cooled fixture for high-temperature bending vibration test of plate material according to claim 5, characterized in that: The plurality of long strip air-cooling through holes are alternately arranged on adjacent side surfaces of the cantilever support, so that two adjacent side surfaces alternately form air-cooling channels, and the two adjacent air-cooling channels are cross-intersected and do not interfere with each other.

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