Flaring test tool and test equipment

Abstract

The utility model relates to the field of test equipment, and discloses a flaring test tool, the flaring test tool comprises a plurality of working rod sections which are sequentially nested, any two adjacent nested working rod sections can telescopically move along the axial direction, and each working rod section comprises an outer working rod section and an inner working rod section nested in the outer working rod section; the axial rear end of the inner working rod section can backstop on the outer working rod section backwards in the axial direction when the axial front end of the inner working rod section extends forwards in the axial direction to the front of the outer working rod section, and the axial front ends of the multiple working rod sections can be selectively pressed into a test workpiece in the flaring test so as to perform flaring on the test workpiece. The flaring test tool and the flaring test equipment can be matched with aluminum alloy extrusion profiles with different cross sections for flaring test after being mounted once, the universality is good, and the test cost can be reduced and the test efficiency can be improved.

Description

Technical Field

[0001] The present application belongs to the field of test equipment, and specifically relates to a flaring test tool and test equipment. Background Art

[0002] In the prior art, for the expansion test of extruded aluminum profiles, corresponding to aluminum alloy profiles of different cross-sectional sizes, each test requires specific tooling based on the profile size, which not only has high test costs but also low test efficiency. Summary of the Invention

[0003] The purpose of this application is to provide a flaring test tool and test equipment, which is conducive to reducing test costs and improving test efficiency.

[0004] In order to achieve the above-mentioned purpose, the present application provides a flaring test fixture on one hand, which includes a plurality of working rod segments nested in sequence, and any two adjacent nested working rod segments can be telescopically moved along the axial direction and include an outer working rod segment and an inner working rod segment nested in the outer working rod segment, wherein:

[0005] When the axial front end of the inner working rod segment extends axially forward to the front of the outer working rod segment, the axial rear end of the inner working rod segment can be stopped axially backward on the outer working rod segment, and the axial front ends of multiple working rod segments can be selectively pressed into the test workpiece to flare the test workpiece during the flaring test.

[0006] In some specific embodiments, a snap-fit ​​structure is formed between the axial front end of the outer working rod segment and the axial rear end or axial middle part of the inner working rod segment, so that the axial rear end of the inner working rod segment can be stopped axially backward on the outer working rod segment.

[0007] In some specific embodiments, the clamping structure includes a clamping portion and a clamping hole engaged with the clamping portion, the clamping portion extends radially outward from the outer peripheral wall of the axial rear end of the inner working rod segment, and the clamping hole is formed on the peripheral wall of the axial front end of the outer working rod segment, wherein,

[0008] The inner working rod segment can be elastically deformed in the radial direction when subjected to a radial force, so that the clamping portion can be released from the clamping hole.

[0009] In some specific embodiments, the cross-sectional shape of the working rod segment is a regular hexagon; wherein,

[0010] The outer peripheral wall of the outer working rod segment is formed by six wall surfaces, each of which is provided with a clamping hole, and the outer peripheral wall of the axial rear end of the inner working rod segment is provided with six clamping portions extending therefrom;

[0011] and / or, a diameter of a circumscribed circle of a cross section of the radially outermost working rod segment is greater than or equal to 550 mm and less than or equal to 650 mm;

[0012] And / or, the radial extension length of the clamping portion is greater than 1.5 mm and less than 3.5 mm;

[0013] And / or, the clamping portion is formed in a prism shape and the edges of the clamping portion are provided with rounded corners.

[0014] In some specific embodiments, when the axial rear end of the inner working rod segment axially rearwardly stops on the outer working rod segment, the axial front end of the inner working rod segment axially forwardly extends from the outer working rod segment by at least 60 mm;

[0015] And / or, the axial length of the working rod segment is greater than or equal to 80 mm and less than or equal to 200 mm.

[0016] In some specific embodiments, the axial front end of the inner working rod segment can be completely retracted into the outer working rod segment during retraction;

[0017] And / or, the expansion test fixture is made of 45 steel.

[0018] In some specific embodiments, the wall thickness of the working rod segment is greater than or equal to 3 mm;

[0019] And / or, the peripheral wall gap between the inner working rod segment and the outer working rod segment is greater than or equal to 1.5 mm and less than or equal to 3.5 mm.

[0020] In some specific embodiments, the expansion test fixture further includes a mounting structure for being mounted and fixed to the testing machine, and the mounting structure is disposed at the axial rear end of the radially outermost working rod segment.

[0021] In some specific embodiments, the mounting structure is integrally formed with the radially outermost working rod segment and includes a mounting end seat and a mounting hole provided on a rear end surface of the mounting end seat.

[0022] A second aspect of the present application provides a test device, the test device comprising:

[0023] Testing machine;

[0024] The above-mentioned expansion test fixture can be used in conjunction with the testing machine.

[0025] Through the above technical solution, since the expansion test fixture includes multiple working rod segments that are nested in sequence, the outer diameter of each working rod segment is different, and the axial front ends of the multiple working rod segments can be selectively pressed into the test workpiece to expand the test workpiece during the expansion test, it can be installed on the testing machine once to match aluminum alloy extruded profiles with different cross-sections for expansion testing, which has good versatility and is conducive to reducing test costs and improving test efficiency.

[0026] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present application, but do not constitute a limitation on the embodiments of the present application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without inventive work. In the drawings:

[0028] Figure 1 A schematic structural diagram of a flaring test tool according to a specific embodiment of the present application is shown;

[0029] Figure 2 Shown Figure 1 A cross-sectional view of the AA position in FIG;

[0030] Figure 3 Shown Figure 1 Cross-sectional view of the BB position in .

[0031] Description of Reference Numerals

[0032] 1 working rod section 11 clamping part

[0033] 12 Snap-in hole 13 Mounting end

[0034] 14 mounting holes DETAILED DESCRIPTION

[0035] The following describes the specific embodiments of the present application in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present application and are not intended to limit the present application.

[0036] like Figure 1 、 Figure 2 as well as Figure 3As shown, the present application provides a novel flaring test fixture for use with a testing machine to perform flaring tests on a test workpiece. The flaring test fixture includes a plurality of nested working rod segments 1, i.e., the plurality of working rod segments 1 are nested in sequence radially outward, such that the cross-sectional areas of the plurality of working rod segments 1 increase radially outward. Any two adjacent nested working rod segments 1 are capable of axial telescopic movement, i.e., any two adjacent nested working rod segments 1 are capable of axial relative movement to switch between an extended state and a retracted state.

[0037] Furthermore, any two adjacent nested working rod segments 1 include an outer working rod segment and an inner working rod segment nested in the outer working rod segment. When the axial front end of the inner working rod segment extends axially forward to the front of the outer working rod segment, the axial rear end of the inner working rod segment can be stopped axially backward on the outer working rod segment. During the expansion test, the axial front ends of the multiple working rod segments can be selectively pressed into the test workpiece to expand the test workpiece.

[0038] Specifically, if Figure 1 A specific embodiment of a flaring test fixture is shown, which includes three nested working rod segments 1, all of which are cylindrical in shape. The three nested working rod segments 1 are respectively a first working rod segment, a second working rod segment, and a third working rod segment. The first working rod segment is nested in the second working rod segment, and the second working rod segment is nested in the third working rod segment. That is, the first working rod segment and the second working rod segment are two adjacent nested working rod segments 1, in which case the first working rod segment is the inner working rod segment and the second working rod segment is the outer working rod segment; the second working rod segment and the third working rod segment are two adjacent nested working rod segments 1, in which case the second working rod segment is the inner working rod segment and the third working rod segment is the outer working rod segment. It should be noted that, in addition to the three shown in the figure, the number of working rod segments 1 can also be two, four, five, etc., and can be set according to actual test needs.

[0039] In addition, the outer diameter of each working rod segment 1 is different. During the expansion test, the appropriate working rod segment 1 can be selected according to the test requirements to perform a matching test on the test workpiece. The working rod segment 1 that is compatible with the test workpiece can be any working rod segment 1, so it can be installed once on the testing machine to match aluminum alloy extruded profiles of different cross-sections for expansion testing. It has good versatility and is conducive to reducing test costs and improving test efficiency.

[0040] Furthermore, during the flaring test, the axial ends of the flaring test fixture are subjected to axial inward pressure under the action of the testing machine. Therefore, when the selected working rod segment 1 is the radially outermost working rod segment 1, the other working rod segments 1 can be in a retracted state. Optionally, the axial front end of the inner working rod segment can be fully retracted into the outer working rod segment during retraction. This makes the overall structure of the flaring test fixture more compact when in the retracted state and avoids potential interference. When the selected working rod segment 1 is not the radially outermost working rod segment 1, the selected working rod segment 1, acting as the inner working rod segment of the adjacent nested two working rod segments 1, is in an extended state, with its axial front end extending axially forward to the front of the outer working rod segment located axially rearward and being stopped axially rearward against the outer working rod segment. In this way, the axial front end of the selected working rod segment 1 can withstand the test pressure, and the test workpiece can be tested with the corresponding working rod segment 1 to flare the test workpiece.

[0041] In some specific embodiments, a clamping structure is formed between the axial front end of the outer working rod segment and the axial rear end of the inner working rod segment, so that the axial rear end of the inner working rod segment can be stopped axially backward on the outer working rod segment. The clamping structure can be a matching structure of a clamping block and a clamping slot, or a matching structure of a clamping block and a clamping hole, and the clamping hole is a through hole. The clamping structure can be easily clamped, and the clamping strength is stable and reliable. It can also be easily released, and the structure is simple and reasonable. In addition, the clamping structure is arranged between the axial front end of the outer working rod segment and the axial rear end of the inner working rod segment, which can make the structure of the expansion test fixture more compact when the whole is in the contracted state, and also make the length setting more reasonable when it is in the extended state. In addition, in addition to being arranged between the axial front end of the outer working rod segment and the axial rear end of the inner working rod segment as described above, the clamping structure can also be arranged between the axial middle part of the outer working rod segment and the axial rear end of the inner working rod segment, etc.

[0042] Specifically, in some embodiments, Figure 1 and 3 As shown, the snap-fit ​​structure includes a snap-fit ​​portion 11 and a snap-fitting hole 12 that snaps into engagement with the snap-fit ​​portion 11. The snap-fit ​​portion 11 extends radially outward from the outer peripheral wall of the axial rear end of the inner working rod segment, while the snap-fitting hole 12 is formed on the peripheral wall of the axial front end of the outer working rod segment. In this way, the snap-fit ​​portion 11 can snap into the snap-fitting hole 12 of the outer working rod segment when the inner working rod segment is extended, making the structure more stable and reliable. Furthermore, the snap-fit ​​portion 11 can be integrally formed with the inner working rod segment, making the structure of the flaring test fixture more stable and reliable, and also helping to reduce production costs.

[0043] Among them, such as Figure 1 and Figure 2As shown, the cylindrical inner working rod segment is nested in the cylindrical outer working rod segment. When the cylindrical inner working rod segment and the cylindrical outer working rod segment are respectively subjected to radial forces, they can undergo adaptive elastic deformation along the radial direction, so that the clamping portion 11 can be disengaged from the clamping hole 12, and the inner working rod segment can also be telescopically moved in the sleeve portion of the outer working rod segment.

[0044] Among them, it should be noted that, in addition to the above-mentioned clamping structure, the stop structure between the inner working rod segment and the outer working rod segment can also be a stop structure, for example, a stop groove is provided on the axial front end face of the outer working rod segment, and a stop block is provided on the axial rear end outer peripheral wall of the inner working rod segment. The stop block can be stopped in the stop groove on the front end face of the outer working rod segment when the inner working rod segment is in the extended state, so as to be able to withstand the axial backward test pressure.

[0045] The flaring part of the existing flaring test fixture is mostly a conical surface. During the test, the part diameter needs to be polished beforehand, which makes the contact angle between the fixture and the part uncertain, thus affecting the test results. Figure 3 As shown, the cross-sectional shape of the working rod segment 1 of the present application can be a regular hexagon. The working rod segment 1 is a regular hexagonal hollow rod. This improves the structural strength of the expansion test fixture and is more suitable for the shape of extruded aluminum profiles used in automobiles, meeting part requirements and enabling real-time monitoring of the profile expansion quality. Of course, the cross-sectional shape of the working rod segment 1 can also be a quadrilateral, pentagon, or other shape in addition to a regular hexagon.

[0046] Optionally, the flaring test fixture can be made of 45-gauge steel, which meets the test strength requirements and is readily available and inexpensive to manufacture. Alternatively, the flaring test fixture can be made of metal materials such as 50-gauge steel or stainless steel. The wall thickness of the working rod segment 1 can be greater than or equal to 3 mm to ensure its structural strength. Preferably, the wall thickness of the working rod segment 1 is greater than or equal to 5 mm.

[0047] Alternatively, as Figure 1 and Figure 3 As shown, the outer peripheral wall of the outer working rod segment is enclosed by six wall surfaces. To further make the expansion test fixture more stable and reliable, a clamping hole 12 is provided on each wall surface. Six clamping portions 11 extend from the outer peripheral wall of the axial rear end of the inner working rod segment. In this way, during the expansion test, the expansion test fixture is subjected to more uniform force and can effectively reduce the force value of each clamping structure. The maximum clamping force of the expansion test fixture of this application is 200N, which is greater than the expansion force of most aluminum alloys.

[0048] Furthermore, the radial extension of the clamping portion 11 can be greater than 1.5 mm and less than 3.5 mm. Accordingly, the circumferential wall gap between the inner and outer working rod segments is greater than or equal to 1.5 mm and less than or equal to 3.5 mm. This ensures the stability and reliability of the clamping structure and makes the structure of the flaring test fixture more rational. Furthermore, the clamping portion 11 is formed into a prismatic shape with rounded corners, which reduces wear when the flaring test fixture is telescopically adjusted. Alternatively, the clamping portion 11 can be a cylinder with a diameter greater than or equal to 6 mm.

[0049] In some specific embodiments, the diameter of the circumscribed circle of the cross section of the radially outermost working rod segment 1 is greater than or equal to 550 mm and less than or equal to 650 mm. Preferably, the diameter of the circumscribed circle of the cross section of the radially outermost working rod segment 1 is greater than or equal to 600 mm, which can meet the diameter requirements of 95% of the extruded aluminum molds used in automobiles.

[0050] Furthermore, to ensure that the flaring test fixture has a reasonable flaring test stroke during the flaring test, and to avoid affecting the flaring test results and damaging the flaring test fixture, when the axial rear end of the inner working rod segment is axially rearwardly stopped on the outer working rod segment, the axial front end of the inner working rod segment extends axially forward from the outer working rod segment by at least 60 mm. Alternatively, the axial length of the working rod segment 1 is greater than or equal to 80 mm and less than or equal to 200 mm. Preferably, the axial length of the working rod segment 1 is less than or equal to 140 mm.

[0051] In some embodiments, Figure 2 As shown, the flare test fixture can also include a mounting structure for securing it to the testing machine. The mounting structure is located at the axial rear end of the radially outermost working rod segment 1. This mounting structure allows the flare test fixture to be securely mounted on the tensile machine, ensuring uniform force application during flare testing, resulting in more accurate test results and improved testing efficiency.

[0052] Alternatively, as Figure 2 As shown, the mounting structure is integrally formed with the radially outermost working rod segment 1, so that the structural strength of the expansion test fixture is better. Of course, the mounting structure can also be welded to the axial rear end of the radially outermost working rod segment 1.

[0053] In some embodiments, Figure 2 As shown, the mounting structure includes a mounting end seat 13 and a mounting hole 14 provided on the rear end surface of the mounting end seat 13. In this way, the mounting structure is simple and reasonable, and can be easily assembled and disassembled.

[0054] Optionally, the mounting end seat 13 is built into the rod cavity of the axially rearmost working rod segment 1 and blocks the axial rear port of the rod cavity of the working rod segment 1, so that the mounting structure is more compact and reasonable. Figure 2 In addition to the shape shown, the mounting end seat 13 may also be square, hexagonal or irregular in shape, etc. The mounting end seat 13 may also be arranged on the outer peripheral wall of the axial rear end of the working rod segment 1 at the axial rear end.

[0055] In addition, the specific shape of the mounting structure can be varied. Figure 2 In addition to the structure shown, the mounting structure may also include a mounting end seat and an external threaded portion or a limiting portion provided on the outer peripheral wall of the mounting end seat.

[0056] Optionally, in order to ensure the installation and fixing strength, the diameter of the mounting hole 14 may be greater than or equal to 15 mm, preferably, the diameter of the mounting hole 14 may be greater than or equal to 20 mm; the depth of the mounting hole 14 may be greater than or equal to 15 mm, preferably, the depth of the mounting hole 14 may be greater than or equal to 20 mm.

[0057] A second aspect of this application further provides a testing device comprising a testing machine and the aforementioned flaring test fixture, which can be used in conjunction with the testing machine. Because the testing device of this application includes the aforementioned flaring test fixture, it also possesses all the technical effects provided by the aforementioned flaring test fixture, and therefore will not be further described here. The testing machine can be a dedicated testing machine or a universal testing machine, etc.

[0058] It should be noted that in this application, unless otherwise specified, directional words such as "inside" refer to a position relatively close to the center point of the expansion test tooling, and "outside" refers to a position relatively far from the center point of the expansion test tooling.

[0059] In addition, those skilled in the art will appreciate that the structure of the testing machine is well known to those skilled in the art and does not belong to the core improvement part of the present application, and therefore will not be described in detail here.

[0060] In summary, the expansion test tool of the present application adopts an adjustable multi-section structure. This design satisfies the expansion test of various calibers and sizes of profiles, realizes the universalization of the tool, and thus saves the cost and time of the test tool.

[0061] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0062] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0063] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0064] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A flaring test tool, characterized in that: It comprises a plurality of working rod segments (1) nested in sequence, any two adjacently nested working rod segments (1) are capable of telescopic movement in the axial direction and comprise an outer working rod segment and an inner working rod segment nested in the outer working rod segment, wherein: When the axial front end of the inner working rod segment extends axially forward to the front of the outer working rod segment, the axial rear end of the inner working rod segment can be stopped axially backward on the outer working rod segment, and the axial front ends of multiple working rod segments can be selectively pressed into the test workpiece to flare the test workpiece during the flaring test.

2. The expansion test tool according to claim 1, characterized in that: A snap-fit ​​structure is formed between the axial front end or axial middle portion of the outer working rod segment and the axial rear end of the inner working rod segment, so that the axial rear end of the inner working rod segment can be stopped axially backward on the outer working rod segment.

3. The expansion test tool according to claim 2, characterized in that: The clamping structure comprises a clamping portion (11) and a clamping hole (12) clamped with the clamping portion (11), wherein the clamping portion (11) extends radially outward from the outer peripheral wall of the axial rear end of the inner working rod segment, and the clamping hole (12) is formed on the peripheral wall of the outer working rod segment, wherein: The inner working rod segment can elastically deform in the radial direction when subjected to a radial force, so that the clamping portion (11) can escape from the clamping hole (12).

4. The expansion test tool according to claim 3, characterized in that: The cross-section of the working rod segment (1) is in the shape of a regular hexagon; wherein, The outer peripheral wall of the outer working rod segment is formed by enclosing six wall surfaces, each of which is provided with a clamping hole (12), and the outer peripheral wall of the axial rear end of the inner working rod segment is provided with six clamping portions (11) extending therefrom. and / or the diameter of the circumscribed circle of the cross section of the radially outermost working rod segment (1) is greater than or equal to 550 mm and less than or equal to 650 mm; And / or, the radial extension length of the clamping portion (11) is greater than 1.5 mm and less than 3.5 mm; And / or, the clamping portion (11) is formed in a prism shape and the edges of the clamping portion (11) are provided with rounded corners.

5. The expansion test tool according to claim 1, characterized in that: When the axial rear end of the inner working rod segment axially rearwardly stops on the outer working rod segment, the axial front end of the inner working rod segment axially forwardly extends from the outer working rod segment by at least 60 mm; And / or, the axial length of the working rod segment (1) is greater than or equal to 80 mm and less than or equal to 200 mm.

6. The expansion test tool according to claim 1, characterized in that: The axial front end of the inner working rod segment can be completely retracted into the outer working rod segment during retraction; And / or, the expansion test fixture is made of 45 steel.

7. The expansion test tool according to claim 1, characterized in that: The wall thickness of the working rod section (1) is greater than or equal to 3 mm; And / or, the peripheral wall gap between the inner working rod segment and the outer working rod segment is greater than or equal to 1.5 mm and less than or equal to 3.5 mm.

8. The expansion test tool according to claim 1, characterized in that: The expansion test fixture further comprises a mounting structure for mounting and fixing with the testing machine, wherein the mounting structure is arranged at the axial rear end of the working rod segment (1) located at the radially outermost portion.

9. The expansion test tool according to claim 8, characterized in that: The mounting structure is integrally formed with the working rod section (1) located at the radially outermost portion and comprises a mounting end seat (13) and a mounting hole (14) provided on the rear end surface of the mounting end seat (13).

10. A test device, characterized in that: include: Testing machine; The expansion test fixture according to any one of claims 1 to 9, wherein the expansion test fixture can be used in conjunction with the testing machine.

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