Thin-wall aluminum pipe performance test stretcher

Abstract

The utility model relates to the field of stretching machines, and discloses a thin-wall aluminum pipe performance test stretching machine which comprises two stretching parts used for stretching a thin-wall aluminum pipe; the two clamping parts are mounted on the sides, close to each other, of the two stretching parts correspondingly and used for clamping the two ends of the thin-wall aluminum pipe; the two supporting parts are mounted on the sides, close to each other, of the two stretching parts correspondingly and used for being supported in the thin-wall aluminum pipe; the supporting part comprises a supporting seat which is installed on one side of the stretching part. According to the utility model, uniform supporting force is provided in the aluminum pipe through the expansion piece, unexpected deformation or distortion of the aluminum pipe in the stretching process is effectively prevented, the accuracy of a test result is further improved, the opening angles and sizes of the first clamping head and the second clamping head are adjustable, and the device can adapt to thin-wall aluminum pipes with different diameters; the clamp does not need to be replaced, and test efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of stretching machines, and particularly relates to a stretching machine for testing the performance of thin-walled aluminum tubes. Background Art

[0002] Thin-walled aluminum tubes are light in weight, corrosion-resistant, and have good thermal conductivity. To ensure that the quality and performance of thin-walled aluminum tubes meet the application requirements, it is particularly important to conduct performance tests on them. Among them, the tensile test is one of the important means to evaluate the mechanical properties of thin-walled aluminum tubes. Using a stretching machine to test thin-walled aluminum tubes, the main purpose is to evaluate their mechanical properties and reliability.

[0003] However, when conducting the tensile test of thin-walled aluminum tubes, the clamping effect of the fixture has become a key issue. Due to the thin wall of the thin-walled aluminum tube, traditional fixtures are prone to cause extrusion deformation to the aluminum tube during clamping, thus affecting the accuracy of the test results. In addition, aluminum tubes with different diameters require different specifications of fixtures for clamping, which not only increases the complexity and cost of the test, but also reduces the test efficiency. Summary of the Utility Model

[0004] To achieve the above objectives, the utility model is realized through the following technical solutions:

[0005] A stretching machine for testing the performance of thin-walled aluminum tubes, comprising:

[0006] Two stretching parts for stretching thin-walled aluminum tubes;

[0007] Two clamping parts respectively installed on one side of the two stretching parts close to each other for clamping both ends of the thin-walled aluminum tube;

[0008] Two supporting parts respectively installed on one side of the two stretching parts close to each other for supporting inside the thin-walled aluminum tube;

[0009] The supporting part includes:

[0010] A supporting seat installed on one side of the stretching part;

[0011] An expansion part installed around the supporting seat, and the expansion part can expand around the supporting seat in the inflated state and evenly support on the inner wall of the thin-walled aluminum tube;

[0012] An inflation part installed on the stretching part and communicated with the expansion part for inflating the expansion part to make it expand.

[0013] The clamping part includes:

[0014] A first clamping head installed on one side of the stretching part;

[0015] The second clamping head is installed on the stretching part on the same side as the first clamping head, and the second clamping head is located below the first clamping head.

[0016] On the sides of the first clamping head and the second clamping head that are close to each other, V-shaped grooves are formed. The openings of the two V-shaped grooves face each other and form an angle, which is used to adapt to and stably clamp thin-walled aluminum tubes with different diameters.

[0017] A receiving groove is formed at the bottom of the first clamping head, and the second clamping head is arranged to move within the receiving groove.

[0018] The clamping part further includes:

[0019] Two clamping power sources are installed on one side of the stretching part, and the power shafts of the two clamping power sources are respectively connected to the first clamping head and the second clamping head;

[0020] Two connecting seats are installed on one side of the stretching part and are connected to the clamping power sources.

[0021] The supporting part further includes:

[0022] An air charging pipe, one end of which is installed on the air charging part and the other end extends into the supporting seat;

[0023] A plurality of connecting pipes are installed in the supporting seat. One ends of the plurality of connecting pipes are communicated with the airbag, and the other ends of the plurality of connecting pipes are connected to the air charging pipe to transmit the gas in the air charging part to the airbag.

[0024] A positioning groove is formed on one side of the stretching part, and the supporting seat is installed in the positioning groove.

[0025] It further includes:

[0026] A stretching power source is installed between the two stretching parts and is used to control the movement of the two stretching parts.

[0027] The utility model provides a stretching machine for testing the performance of thin-walled aluminum tubes. Compared with the prior art, it has the following beneficial effects:

[0028] 1. By providing a uniform supporting force inside the aluminum tube through the expansion part, it effectively prevents the unexpected deformation or distortion of the aluminum tube during the stretching process, and further improves the accuracy of the test results.

[0029] 2. The first clamping head and the second clamping head make the clamping more stable, avoid the deformation of the aluminum tube caused by improper clamping, improve the accuracy of the test results. The opening angle and size of the first clamping head and the second clamping head are adjustable, and can adapt to thin-walled aluminum tubes with different diameters, without the need to replace the fixture, reducing the complexity and cost of the test, and improving the test efficiency. Description of the Drawings

[0030] Figure 1 Schematic diagram of the three-dimensional structure proposed by the present utility model.

[0031] Figure 2 Schematic diagram of the three-dimensional structure of the stretching part, clamping part and supporting part proposed by the present utility model.

[0032] Figure 3 Schematic diagram of the three-dimensional structure of the stretching part, clamping part and supporting part from another perspective proposed by the present utility model.

[0033] Figure 4 Schematic diagram of the partial cross-sectional structure of the stretching part, clamping part and supporting part proposed by the present utility model.

[0034] The reference numerals in the figure are:

[0035] 1. Stretching part; 101. Positioning groove;

[0036] 2. Stretching power source;

[0037] 3. Clamping part; 301. First clamping head; 302. Second clamping head; 303. Accommodating groove; 304. Clamping power source; 305. Connecting seat;

[0038] 4. Supporting part; 401. Supporting seat; 402. Expansion member; 403. Inflating member; 404. Inflating pipe; 405. Connecting pipe. Detailed implementation manners

[0039] In order to make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model are described clearly and completely. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0040] Referring to Figures 1 - 4 , a tensile testing machine for the performance of thin-walled aluminum tubes, comprising:

[0041] Two stretching parts 1 are used to stretch the thin-walled aluminum tube. The stretching part 1 is used to provide a stretching force to test the tensile properties of the thin-walled aluminum tube; two clamping parts 3 are respectively installed on one side of the two stretching parts 1 close to each other. The clamping part 3 is used to stably clamp both ends of the aluminum tube to ensure that the aluminum tube does not slide or move during the stretching process, thereby ensuring the accuracy of the test; two supporting parts 4 are respectively installed on one side of the two stretching parts 1 close to each other and are used to support inside the thin-walled aluminum tube. The supporting part 4 provides a uniform supporting force inside the aluminum tube to prevent the aluminum tube from undergoing unexpected deformation or distortion during the stretching process, which helps to more accurately evaluate the tensile properties of the aluminum tube; the supporting part 4 includes: a supporting seat 401 installed on one side of the stretching part 1. A positioning groove 101 is provided on one side of the stretching part 1, and the supporting seat 401 is installed in the positioning groove 101; an expansion part 402 is installed around the supporting seat 401. The expansion part 402 can expand around the supporting seat 401 in the inflated state and uniformly support on the inner wall of the thin-walled aluminum tube; an inflation part 403 is installed on the stretching part 1 and is connected to the expansion part 402 for inflating the expansion part 402 to make it expand. The stretching power source 2 is installed between the two stretching parts 1 and is used to control the movement of the two stretching parts 1. The stretching power source 2 uses a cylinder or can also use a hydraulic cylinder. The inflation part 403 uses an air pump, and the expansion part 402 uses a rubber airbag. After installing the thin-walled aluminum tube between the two clamping parts 3, use the inflation part 403 to inflate the expansion part 402 to make it expand. The expansion part 402 deforms and clings to the inner wall of the thin-walled aluminum tube, and provides further support for it to prevent the clamping area from deforming during the clamping and stretching process.

[0042] Refer to Figure 2 and Figure 3 For reference

[0043] Refer to Figure 2 and Figure 3, the clamping part 3 further includes: two clamping power sources 304, installed on one side of the stretching part 1, and the power shafts of the two clamping power sources 304 are respectively connected to the first clamping head 301 and the second clamping head 302; two connecting seats 305, installed on one side of the stretching part 1 and connected to the clamping power source 304. The clamping power source 304 uses a linear motor or a cylinder. The clamping power source 304 provides power for the clamping part 3 to ensure that the clamping head can firmly clamp the aluminum tube. The connecting seat 305 serves as the installation base of the clamping power source 304 to ensure the stability of the entire structure.

[0044] Refer to Figure 3 and Figure 4 , the supporting part 4 further includes: an inflation tube 404, one end of which is installed on the inflating member 403 and the other end extends into the supporting seat 401; a plurality of connecting tubes 405, installed in the supporting seat 401. One ends of the plurality of connecting tubes 405 are communicated with the airbag, and the other ends of the plurality of connecting tubes 405 are connected to the inflation tube 404 to transmit the gas in the inflating member 403 to the airbag. The inflation tube 404 and the connecting tubes 405 together constitute the gas transmission system of the supporting part 4 to ensure that the gas in the inflating member 403 can be evenly transmitted to the expansion member 402, thereby realizing uniform supporting force.

[0045] During use, place the stretching machine on a flat and stable workbench, and connect all power and pneumatic pipelines. According to the diameter of the thin-walled aluminum tube to be tested, adjust the opening size of the V-grooves of the first clamping head 301 and the second clamping head 302 in the clamping part 3 to ensure that the aluminum tube can be stably clamped. Ensure that the expansion part 402 of the support part 4 is in an un-inflated state and the inflating part 403 is ready. Place the thin-walled aluminum tube to be tested between the two clamping parts 3, and ensure that both ends of the aluminum tube are respectively aligned with the V-grooves of the first clamping head 301 and the second clamping head 302. Start the clamping power source 304 to drive the first clamping head 301 and the second clamping head 302 to approach each other until the clamping heads tightly clamp both ends of the aluminum tube. Start the inflating part 403, and inflate the expansion part 402 of the support part 4 through the inflating pipe 404 and the connecting pipe 405. As the gas is filled, the expansion part 402 gradually expands and closely adheres to the inner wall of the aluminum tube, providing a uniform supporting force for the aluminum tube. Start the stretching power source 2 to drive the two stretching parts 1 to move away from each other, thereby applying a stretching force to the aluminum tube. The magnitude and speed of the stretching force can be controlled by the stretching power source 2. Simulate different stretching conditions according to the test requirements. During the stretching process, the expansion part 402 of the support part 4 always provides a uniform supporting force for the aluminum tube to prevent unexpected deformation or distortion of the aluminum tube. The stretching machine can be equipped with sensors and a data acquisition system to record various data during the stretching process in real time, and the stretching performance of the aluminum tube can be evaluated and analyzed. After completing the stretching test, stop the operation of the stretching power source 2 and the inflating part 403, let the aluminum tube cool naturally in the clamped state, start the clamping power source 304 to drive the first clamping head 301 and the second clamping head 302 to move away from each other, release the aluminum tube, take out the aluminum tube, check its state after stretching, and perform subsequent processing or analysis as needed.

[0046] In summary, compared with the prior art, the following beneficial effects are achieved:

[0047] By providing a uniform supporting force inside the aluminum tube through the expansion part 402, unexpected deformation or distortion of the aluminum tube during the stretching process is effectively prevented, further improving the accuracy of the test results.

[0048] The first clamping head 301 and the second clamping head 302 make the clamping more stable, avoiding deformation of the aluminum tube caused by improper clamping, improving the accuracy of the test results. The opening angle and size of the first clamping head 301 and the second clamping head 302 are adjustable, capable of adapting to thin-walled aluminum tubes of different diameters without the need to replace the fixture, reducing the complexity and cost of the test, and improving the test efficiency.

[0049] It should be noted that in this text, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the said element.

[0050] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A thin-walled aluminum tube performance test stretching machine, characterized in that: include: Two stretching parts (1) for stretching the thin-walled aluminum tube; Two clamping parts (3) are respectively mounted on the sides of the two stretching parts (1) close to each other, and are used to clamp the two ends of the thin-walled aluminum tube; Two support parts (4) are respectively installed on the sides of the two stretching parts (1) close to each other, and are used for supporting in the thin-walled aluminum tube; The support portion (4) comprises: A support seat (401) mounted on one side of the stretching portion (1); An expansion member (402) is installed around the support seat (401), and the expansion member (402) can expand around the support seat (401) in an inflated state and be evenly supported on the inner wall of the thin-walled aluminum tube; The inflatable member (403) is mounted on the stretching portion (1), is connected to the expansion member (402), and is used to inflate the expansion member (402) to expand it.

2. A thin-walled aluminum tube performance testing tensile machine according to claim 1, characterized in that: The clamping portion (3) comprises: A first clamping head (301) mounted on one side of the stretching portion (1); The second clamping head (302) is mounted on the stretching portion (1) on the same side as the first clamping head (301), and the second clamping head (302) is located below the first clamping head (301).

3. A thin-walled aluminum tube performance testing tensile machine according to claim 2, characterized in that: A V-shaped groove is formed on the side of the first clamping head (301) and the second clamping head (302) that are close to each other, and the openings of the two V-shaped grooves are opposite to each other and form an angle, which is used to adapt to and stably clamp thin-walled aluminum tubes of different diameters.

4. A thin-walled aluminum tube performance testing tensile machine according to claim 2, characterized in that: A receiving groove (303) is provided at the bottom of the first clamping head (301), and the second clamping head (302) is arranged to move in the receiving groove (303).

5. A thin-walled aluminum tube performance testing tensile machine according to claim 2, characterized in that: The clamping portion (3) further comprises: Two clamping power sources (304) are installed on one side of the stretching portion (1), and power shafts of the two clamping power sources (304) are respectively connected to the first clamping head (301) and the second clamping head (302); Two connecting seats (305) are installed on one side of the stretching portion (1) and are connected to the clamping power source (304).

6. A thin-walled aluminum tube performance testing tensile machine according to claim 1, characterized in that: The support portion (4) further comprises: An inflation tube (404), one end of which is mounted on the inflation member (403) and the other end of which extends into the support seat (401); A plurality of connecting tubes (405) are installed in the support seat (401), one end of the plurality of connecting tubes (405) is connected to the airbag, and the other end of the plurality of connecting tubes (405) is connected to the inflation tube (404) to transmit the gas in the inflation member (403) to the airbag.

7. A thin-walled aluminum tube performance testing tensile machine according to claim 1, characterized in that: A positioning groove (101) is provided on one side of the stretching portion (1), and the support seat (401) is installed in the positioning groove (101).

8. The thin-walled aluminum tube performance testing tensile machine according to claim 1, characterized in that: Also includes: A stretching power source (2) is installed between the two stretching parts (1) and is used to control the movement of the two stretching parts (1).

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