Tensile test fixture and tensile test apparatus

Abstract

The application relates to the technical field of material test clamps, and discloses a tensile and compressive test clamp and tensile and compressive test equipment, which comprises a main chuck, a clamping part of the main chuck, a plurality of clamping positions for bearing a test piece on the clamping part, and a plurality of fixing blocks. The fixing blocks are detachably connected with the clamping part, and the fixing blocks and the clamping positions are correspondingly arranged. A clamping space is formed between the fixing blocks and the clamping positions. The fixing blocks are detachably connected with the clamping part of the main chuck, and a plurality of clamping positions are arranged on the opposite sides of the clamping part. The clamping positions and the fixing blocks are correspondingly arranged, a clamping space is formed between the fixing blocks and the clamping positions, the clamping space can effectively clamp and fix the opposite sides of the test piece, tensile and compressive test can be carried out, holes need not to be punched on the test piece for fixation, the test piece is prevented from being pre-damaged due to the holes in the test process, the test piece is prevented from being damaged at the holes in the test process, the accuracy of test results is improved, and the test cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of material testing fixture, in particular to a tensile and compression testing fixture and a testing equipment. BACKGROUND

[0002] Fiber reinforced resin matrix composite material has high specific strength, high specific stiffness, and can be integrally formed, etc. advantages, mainly applied to the compressor cold end casing of aero-engine, which helps to reduce the weight of the engine, improve the propulsion efficiency, reduce noise and emissions. Among them, the composite T-shaped feature is a widely used non-planar connection form on domestic and foreign aircraft structures. Because the local position of the compressor casing is a typical T-shaped feature, there is a large stress concentration and the load borne is complex, so the T-shaped feature is simulated and the corresponding mechanical test is carried out, which has an important guiding role for the later test verification of the component.

[0003] At present, in the tensile test of the composite T-shaped feature, a hole is often needed to be opened on the test piece to fix the chuck of the testing machine with the test piece. However, in the process of tensile test, the hole on the test piece is a stress concentration area, there is a large shear stress, which is easy to cause the test piece to be damaged at the edge of the hole, rather than the T-shaped feature connection, which affects the test results and increases the cost. And the opening also increases the processing difficulty and cost of the test piece. If the local hole edge is thickened to reduce the stress concentration of the hole edge, the cost will also increase significantly. SUMMARY

[0004] Therefore, the present application provides a tensile test fixture and a tensile test equipment to solve the problem that the traditional tensile test fixture needs to open a hole on the test piece for fixation and clamping, which is easy to cause the test piece to be damaged at the edge of the hole during the tensile or compression process, rather than the T-shaped feature connection, which affects the accuracy of the test results and increases the cost.

[0005] In the first aspect, the present application provides a tensile test fixture, comprising: a main chuck comprising a clamping part, the clamping part having a plurality of clamping positions for bearing a test piece to be tested, the plurality of clamping positions being arranged on opposite sides of the clamping part; a plurality of fixing blocks, each of the plurality of fixing blocks being detachably connected with the clamping part, and each of the plurality of fixing blocks being correspondingly arranged with each of the plurality of clamping positions, and a clamping space being formed between the fixing block and the clamping position.

[0006] Beneficial effects: by detachable connecting the fixed block with the clamping part of the main chuck, and setting multiple clamping positions on the opposite sides of the clamping part, the clamping position and the fixed block are correspondingly set, so that the clamping space is formed between the fixed block and the clamping position, which can effectively clamp and fix the two sides of the test piece, and the test piece is not needed to be punched and fixed, the pre-damage of the test piece caused by the punching during the test process is avoided, and then the damage of the test piece at the punching position during the test process is avoided, the accuracy of the test result is improved, and the test cost is reduced.

[0007] In an alternative embodiment, the clamping part comprises a connecting plate, and two clamping blocks connected to the top surface of the connecting plate towards the fixed block, so that the two clamping blocks are oppositely spaced apart at the two ends of the connecting plate, and the clamping position is formed on the surface of the clamping block away from the connecting plate, and the clamping position cooperates with the side surface of the fixed block towards the clamping block to form the clamping space.

[0008] Beneficial effects: by installing the two clamping blocks to the top surface of the connecting plate towards the fixed block, and oppositely spacing apart the two clamping blocks at the two ends of the connecting plate, the clamping position is formed on the surface of the clamping block away from the connecting plate, so that the clamping position cooperates with the fixed block to form the clamping space, so that the end of the test piece is inserted into the clamping space for fixation without punching, and the test piece is not damaged before the test.

[0009] In an alternative embodiment, the tensile test fixture further comprises a connecting piece, and the distance between the clamping block and the fixed block is adjustable, and the connecting piece connects the clamping block and the fixed block.

[0010] Beneficial effects: by setting the connecting piece, the distance between the clamping block and the fixed block is adjusted by the connecting piece, and the size of the clamping space can be adjusted according to the actual size of the test piece at any time, so as to effectively clamp and fix the test piece.

[0011] In an alternative embodiment, the clamping part is provided with bolt holes, the bolt holes are provided through the clamping block and the connecting plate, the bolt holes are provided with multiple, the fixed block is provided with multiple fixing holes, the multiple fixing holes are correspondingly provided with the multiple bolt holes, and the connecting piece sequentially passes through the corresponding fixing holes and the bolt holes to connect the clamping block and the fixed block.

[0012] Beneficial effects: by setting multiple through bolt holes on the clamping block and the connecting plate, and setting multiple fixing holes on the fixed block corresponding to the positions of the bolt holes, the fixed block and the clamping part are fixed by sequentially passing the connecting piece through the fixing holes and the bolt holes.

[0013] In an alternative embodiment, a plurality of the fixing holes are arranged at intervals on the fixing block, a plurality of the bolt holes are arranged at intervals on the clamping portion, and the clamping space is located between adjacent fixing holes and adjacent bolt holes and is adapted to accommodate the test piece to be tested.

[0014] Beneficial effects: By arranging a plurality of fixing holes at intervals on the fixing block and a plurality of bolt holes at intervals on the clamping portion, the clamping space is located between adjacent fixing holes and adjacent bolt holes and is adapted to accommodate the test piece to be tested. On the one hand, the test piece to be tested can be further limited by the connecting member to avoid movement during the test. On the other hand, the test piece to be tested is effectively prevented from being punched to cause pre-damage.

[0015] In an alternative embodiment, one side of the clamping block facing the fixing block and one side of the fixing block facing the clamping block are formed with knurled patterns.

[0016] Beneficial effects: By arranging the one side of the clamping block facing the fixing block and the one side of the fixing block facing the clamping block with knurled patterns, the test piece to be tested can be effectively prevented from sliding when a load is applied to the test piece to be tested, the test piece to be tested is further limited, and the clamping force is enhanced.

[0017] In an alternative embodiment, the main chuck further comprises a fixing column connected to the clamping portion, the fixing column extends away from the clamping portion, and the fixing column is lockably and slidably connected to the connecting plate to adjust the relative position of the fixing column and the connecting plate.

[0018] Beneficial effects: By slidably connecting the fixing column to the side of the clamping portion away from the test piece to be tested, the relative position between the clamping portion and the fixing column can be adjusted, the fixing column can be coaxial with the test piece to be tested, and the main chuck can be connected to a conventional tensile testing machine (upper and lower chucks coaxial), thereby having a wider range of applications.

[0019] In an alternative embodiment, a sliding groove is formed in the bottom surface of the connecting plate away from the clamping block, the fixing column comprises a column body and a sliding block, the sliding block is installed at the end of the column body facing the connecting plate, and the sliding block is lockably installed in the sliding groove.

[0020] Beneficial effects: By forming a sliding groove in the bottom surface of the connecting plate away from the clamping block and arranging a sliding block adapted to the sliding groove at the end of the column body facing the connecting plate, the sliding block is freely moved along the extension direction of the sliding groove, thereby driving the column body connected to the sliding block to move, the relative movement between the clamping portion and the fixing column occurs, the position is adjusted, the fixing column is coaxial with the test piece to be tested, and the main chuck can be connected to the upper and lower chucks of the tensile testing machine.

[0021] In an alternative embodiment, the tensile test clamp is made of stainless steel or nickel-based alloy.

[0022] Beneficial effects: By using stainless steel or nickel-based alloy for the tensile test clamp, the tensile test clamp can be used in high-temperature or ultra-high-temperature environments, avoiding functional failure of the clamp when performing tensile test in high-temperature environments.

[0023] In a second aspect, the present application further provides a tensile test equipment, comprising: a tensile testing machine for performing tensile test on a test piece; and the tensile test clamp as described above, which is connected to the chuck of the tensile testing machine.

[0024] Beneficial effects: By clamping and fixing the test piece and the tensile test clamp, and clamping and connecting the tensile test clamp and the tensile testing machine, the tensile test is facilitated. During clamping of the test piece by the tensile test clamp, there is no need to punch and fix, avoiding pre-damage of the test piece. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the specific embodiments or prior art of the present application, the drawings needed in the description of the specific embodiments or prior art will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0026] Figure 1 FIG. 1 is a structural schematic diagram of a tensile test clamp clamping a test piece according to an embodiment of the present application;

[0027] Figure 2 FIG. 2 is a structural schematic diagram of a main chuck of the tensile test clamp disclosed in the present application; Figure 1

[0028] FIG. 3 is a structural schematic diagram of a fixed block of the tensile test clamp disclosed in the present application; Figure 3 Figure 1 FIG. 4 is a structural schematic diagram of a test piece.

[0029] Figure 4 FIG. 5 is a structural schematic diagram of a test piece.

[0030] Legend of reference signs:

[0031] 1, main chuck; 11, clamping part; 111, connecting plate; 112, clamping block; 12, fixed column; 2, fixed block; 3, test piece; 31, vertical section; 32, horizontal section; 4, fixed hole; 5, connecting piece; 6, sliding groove; 7, sliding block. DETAILED DESCRIPTION

[0032] ​The technical solutions of the present application will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0033] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0034] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as there is no conflict between them.

[0036] In order to overcome the problem that the traditional tensile and compressive test fixture needs to open a hole on the test piece for fixing and clamping, which easily leads to damage of the hole edge during the tensile or compressive process, and the damage of the connection of the non-T-shaped feature, affecting the accuracy of the test results, and increasing the cost.

[0037] The embodiments of the present application will be described below with reference to the drawings. Figures 1 to 4 The embodiments of the present application will be described below with reference to the drawings.

[0038] According to the embodiments of the present application, on the one hand, a tensile and compressive test fixture is provided, comprising: a main chuck 1 and a plurality of fixing blocks 2.

[0039] Specifically, the main chuck 1 comprises a clamping part 11, the clamping part 11 has a plurality of clamping positions for bearing the test piece 3 to be tested, and the plurality of clamping positions are arranged on opposite sides of the clamping part 11; a plurality of fixing blocks 2 are detachably connected with the clamping part 11, and the plurality of fixing blocks 2 are respectively arranged corresponding to the plurality of clamping positions, and a clamping space is formed between the fixing block 2 and the clamping position.

[0040] In combination Figures 1 to 4 As shown in FIG. 1, the embodiment of the present application is characterized in that the fixed block 2 is detachably connected with the clamping portion 11 of the main chuck 1, and a plurality of clamping sites are arranged on opposite sides of the clamping portion 11, and the clamping sites and the fixed block 2 are correspondingly arranged, so that a clamping space is formed between the fixed block 2 and the clamping sites, which can effectively clamp and fix the test piece 3 to be tested, and the test is performed without the need of punching holes on the test piece 3 to be tested for fixation, thereby avoiding the pre-damage of the test piece 3 to be tested due to the punching holes during the test, and further avoiding the damage of the test piece 3 to be tested at the punching holes during the test, improving the accuracy of the test results and reducing the test cost.

[0041] It can be understood that the clamping site can carry the test piece 3 to be tested, and the clamping site can be a plane, and when one side of the test piece 3 to be tested is placed on the clamping site, the fixed block 2 can be connected above the test piece 3 to be tested from the clamping site, and the fixed block 2 is detachably connected with the clamping site, so as to form a clamping space suitable for accommodating the test piece 3 to be tested, so as to clamp and fix the test piece 3 to be tested. Of course, the clamping site can also be in the form of a groove suitable for the placement of the test piece 3 to be tested, so as to avoid the movement of the test piece 3 to be tested. Therefore, as long as the clamping site can carry the test piece 3 to be tested, and can be correspondingly arranged with the fixed block 2 to form a clamping space capable of clamping and fixing the test piece 3 to be tested.

[0042] According to one embodiment of the present application, referring to Figure 1 As shown in FIG. 1, the clamping portion 11 comprises a connecting plate 111 and two clamping blocks 112.

[0043] Specifically, the two clamping blocks 112 are respectively connected to the two ends of the top surface of the connecting plate 111 facing the fixed block 2, so that the two clamping blocks 112 are oppositely spaced, and the surface of the clamping block 112 away from the connecting plate 111 forms a clamping site, and the clamping site cooperates with the side surface of the fixed block 2 facing the clamping block 112 to form a clamping space.

[0044] Referring to Figure 1 As shown in FIG. 1, the embodiment of the present application is characterized in that the two clamping blocks 112 are installed to the top surface of the connecting plate 111 facing the fixed block 2, and the two clamping blocks 112 are oppositely spaced at the two ends of the connecting plate 111, and the surface of the clamping block 112 away from the connecting plate 111 forms the above-mentioned clamping site, so that the clamping site cooperates with the fixed block 2 to form a clamping space, so that the end of the test piece 3 to be tested is fixed in the clamping space without the need of punching holes, thereby avoiding the damage of the test piece 3 to be tested before the test.

[0045] It can be understood that the two clamping blocks 112 and the connecting plate 111 combine to form a "U-shaped groove" structure, two ends of the test piece 3 to be tested are installed into the clamping space for fixation, and the test piece 3 to be tested is located in the hollow part in the middle of the clamping part 11 above the connecting plate 111, so as to exert a load on the test piece 3 to be tested for a tensile test.

[0046] According to one embodiment of the present application, referring to Figure 1 , the tensile test fixture further comprises a connecting piece, the distance between the clamping block 112 and the fixed block 2 is adjustable, and the connecting piece 5 connects the clamping block 112 and the fixed block 2.

[0047] As shown in Figure 1 , the embodiment of the present application sets the connecting piece 5, adjusts the distance between the clamping block 112 and the fixed block 2 by the connecting piece 5, and can adjust the size of the clamping space at any time according to the actual size of the test piece 3 to be tested, so as to effectively clamp and fix the test piece 3 to be tested.

[0048] It can be understood that the connecting piece 5 can be a clamping block, one of the clamping block 112 or the fixed block 2 is provided with a clamping groove, and the other of the clamping block 112 or the fixed block 2 is provided with a clamping block clamped into the clamping groove, by clamping the clamping block into the clamping groove, the clamping block 112 and the fixed block 2 are fixedly connected, and by adjusting the depth of the clamping block clamped into the clamping groove, the distance between the clamping block 112 and the fixed block 2 can be flexibly adjusted, so that the tensile test fixture can clamp test pieces 3 to be tested with different thickness sizes. Of course, the connecting piece 5 can also be provided in other arbitrary forms, as long as the clamping block 112 and the fixed block 2 can be detachably connected, and the distance between the clamping block 112 and the fixed block 2 can be adjusted.

[0049] According to one embodiment of the present application, in combination with Figure 1 and Figure 3 , the clamping block 112 is provided with a bolt hole, the bolt hole penetrates the clamping block 112 and the connecting plate 111 at the same time, the bolt hole is provided with a plurality of bolt holes, the fixed block 2 is provided with a plurality of fixed holes 4, the plurality of fixed holes 4 are correspondingly arranged with the bolt holes, and the connecting piece 5 passes through the correspondingly arranged fixed holes 4 and the bolt holes in sequence to connect the clamping block 112 and the fixed block 2.

[0050] In combination with Figure 1 and Figure 3 , the embodiment of the present application sets a plurality of through bolt holes on the clamping block 112 and the connecting plate 111, sets a plurality of fixed holes 4 on the fixed block 2 at positions corresponding to the bolt holes, and sets the connecting piece 5 as a bolt, so as to pass through the fixed holes 4 and the bolt holes in sequence by the connecting piece 5 to fix the fixed block 2 and the clamping part 11.

[0051] According to one embodiment of the present application, in combination withFigure 1 and Figure 3 As shown in

[0052] The embodiment of the present application can further limit the test piece 3 by the connecting member 5, avoid the test piece 3 from moving during the test, and effectively avoid the test piece 3 from being punched, causing pre-damage, by arranging the plurality of fixing holes 4 on the fixing block 2 and the plurality of bolt holes on the clamping portion 11, and arranging the clamping space between the adjacent fixing holes 4 and the adjacent bolt holes.

[0053] According to an embodiment of the present application, referring to Figure 1 As shown in

[0054] Specifically, referring to Figure 1 As shown in

[0055] According to an embodiment of the present application, in combination with Figure 1 and Figure 2 As shown in

[0056] In combination with Figure 1 and Figure 2 The embodiment of the present application can adjust the relative position between the clamping portion 11 and the fixing column 12, facilitate the fixing column 12 to be coaxial with the test piece 3, and further be connected with the conventional tensile testing machine (the upper and lower clamping heads are coaxial), by slidingly connecting the fixing column 12 with the side of the clamping portion 11 away from the test piece 3, so as to have a wider application range.

[0057] According to an embodiment of the present application, referring to Figure 2 As shown in

[0058] AsFigure 2 As shown, the embodiment of the present application is characterized in that a sliding groove 6 is formed in the bottom surface of the connecting plate 111 away from the clamping block 112, and a sliding block 7 is arranged at the end of the column body towards the connecting plate 111 and is matched with the sliding groove 6. The sliding block 7 is freely movable along the extension direction of the sliding groove 6, thereby driving the column body to move, causing the relative movement between the clamping part 11 and the fixing column 12, adjusting the position, so that the fixing column 12 is coaxial with the test piece 3 to be tested, thereby being able to be connected with the upper and lower clamping heads of the tensile testing machine.

[0059] It can be understood that, referring to Figure 2 As shown, the sliding block 7 can be arranged inside the sliding groove 6 and freely slide along the extension direction of the sliding groove 6 to achieve the effect of adjusting the relative position of the clamping part 11 and the fixing column 12. The sliding block 7 can include a sliding block body and a locking member (not shown in the figure) arranged on the sliding block body. The end of the column body towards the connecting plate 111 is connected with the sliding block body. The locking member has a locked state and an unlocked state. When the locking member is in the unlocked state, the sliding block body can freely slide along the extension direction of the sliding groove 6, thereby driving the column body to move, causing the relative movement between the clamping part 11 and the fixing column 12. When the locking member is in the locked state, the locking member can lock the sliding block body in the sliding groove 6, causing the relative fixation between the clamping part 11 and the fixing column 12. Therefore, the position of the fixing column 12 can be adjusted by moving the sliding block 7, so that the fixing column 12 is coaxially arranged with the test piece 3 to be tested, and then locked by the locking member to avoid the movement of the fixing column 12 during the test, so as to be connected with the tensile testing machine (to be introduced below).

[0060] Specifically, the locking member can include a locking screw and a screwing part fixedly arranged at the end of the locking screw. A threaded hole matched with the locking screw is formed in the sliding block body. The end of the locking screw away from the screwing part can abut to the side wall of the sliding groove 6 through the threaded hole to achieve locking. The screwing part can operate the locking screw to screw in or out of the threaded hole, so that the locking screw abuts and locks with the side wall of the sliding groove 6, or the locking screw is separated from the side wall of the sliding groove 6 to be unlocked. Of course, the locking member can also be arranged in other forms, as long as it can achieve the effect of controlling the relative fixation or movement between the fixing column 12 and the clamping part 11.

[0061] According to an embodiment of the present application, the tensile testing fixture can be made of stainless steel or nickel-based alloy material. In this way, the tensile testing fixture can be used in high-temperature or ultra-high-temperature environments, avoiding the failure of the fixture function when compressively testing in a high-temperature environment.

[0062] According to an embodiment of the present application, in combination with Figure 1 and Figure 4 As shown, in another aspect, a tensile testing device is also provided, characterized in that it includes a tensile testing machine and the above-mentioned tensile testing fixture.

[0063] Specifically, the tensile testing machine is used for performing tensile test on the test piece 3, and the tensile test fixture is connected to the chuck of the tensile testing machine.

[0064] The tensile testing machine has upper and lower chucks, which can be selected in different forms to be connected with the tensile test fixture or the test piece 3.

[0065] In combination Figures 1 to 4 As shown, the tensile testing equipment can perform tensile test on the T-shaped feature. Specifically, the T-shaped feature includes a vertical segment 31 and a horizontal segment 32 connected to the end of the vertical segment 31, and the vertical segment 31 and the horizontal segment 32 are perpendicular to each other, and the tensile test is mainly to observe the connection between the vertical segment 31 and the horizontal segment 32. Since the conventional tensile testing machine needs to drill holes at both ends of the horizontal segment 32 to fix the horizontal segment 32 by bolts, however, such arrangement causes the holes to be damaged first during the tensile test, affecting the test result. Therefore, the present application connects the clamping part 11 with the fixing block 2, so that the clamping space is formed corresponding to the clamping position on both sides of the horizontal segment 32 and the fixing block 2, and the ends of the horizontal segment 32 can be fixed in the clamping space, and the vertical segment 31 can be clamped and connected with the upper chuck of the tensile testing machine, without the need to drill holes in the T-shaped feature for fixation.

[0066] When the tensile testing equipment of the present embodiment is used to perform tensile test on the T-shaped feature, in combination Figure 1 As shown, first, the fixing column 12 is clamped and connected with the lower chuck of the tensile testing machine; then, the end of the horizontal segment 32 of the T-shaped feature is placed on the clamping position, and the fixing block 2 is connected with the clamping position, so that the end of the horizontal segment 32 of the T-shaped feature can be fixed and installed in the clamping space formed by the fixing block 2 and the clamping position; finally, according to the position of the end of the vertical segment 31 of the T-shaped feature, the relative position between the fixing column 12 and the clamping part 11 is adjusted, so that the fixing column 12 and the vertical segment 31 can be coaxial, and then the vertical segment 31 is clamped and connected with the upper chuck of the tensile testing machine, so as to perform tensile test. Such arrangement not only eliminates the need to drill holes in the T-shaped feature for fixation, but also can be applied to conventional tensile testing machines (upper and lower chucks are coaxial), with wide application range.

[0067] Although the embodiments of the present application have been described in conjunction with the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope defined by the appended claims.

Claims

1. A tensile test jig, characterized by, The utility model relates to a kind of tension test fixture, including: Main chuck (1), including clamping part (11), the clamping part (11) has the multiple clamping sites of carrying the test piece (3) to be examined, multiple the clamping site is separately arranged in the opposite sides of the clamping part (11), the test piece (3) to be examined is T type feature piece; Multiple fixed blocks (2), multiple the fixed block (2) is detachably connected with the clamping part (11), multiple the fixed block (2) is respectively arranged with multiple the clamping site, and the fixed block (2) and the clamping site form clamping space between; The clamping part (11) includes connecting plate (111) and two clamping blocks (112), two the clamping block (112) is respectively connected with the top surface of the connecting plate (111) towards the fixed block (2) two ends, so that two the clamping block (112) is relatively spaced apart, the clamping block (112) is formed the clamping site away from the connecting plate (111) one side, the clamping site and the fixed block (2) are formed the clamping space away from the clamping block (112) one side, the connecting plate (111) bottom surface away from the clamping block (112) is equipped with sliding slot (6); The main chuck (1) further includes fixed column (12) connected to the clamping part (11), the fixed column (12) extends towards away from the clamping part (11) direction, the fixed column (12) includes column body and sliding block (7), the sliding block (7) is installed on the end of the column body towards the connecting plate (111), the sliding block (7) is lockably installed in the sliding slot (6); The sliding block (7) includes sliding block body and locking member arranged on the sliding block body, the locking member has locking state and unlocking state, when the locking member is in the unlocking state, the sliding block body can freely slide along the extension direction of the sliding slot (6), so that the clamping part (11) and the fixed column (12) are relatively moved;When the locking member is in the locking state, the locking member locks the sliding block body in the sliding slot (6), so that the clamping part (11) and the fixed column (12) are relatively fixed; By the movement of the sliding block (7), the position of the fixed column (12) is adjusted, so that the fixed column (12) is coaxially arranged with the test piece (3) to be examined, and locked by the locking member.

2. The pull test fixture of claim 1, wherein, The tension test fixture further includes connecting member (5), the distance between the clamping block (112) and the fixed block (2) is adjustable, and the connecting member (5) connects the clamping block (112) and the fixed block (2).

3. The pull test fixture of claim 2, wherein, The clamping part (11) is provided with bolt holes, the bolt holes are arranged through the clamping block (112) and the connecting plate (111) simultaneously, the bolt holes are provided with multiple, the fixed block (2) is provided with multiple fixing holes (4), multiple fixing holes (4) are arranged correspondingly with multiple the bolt hole, and the connecting member (5) passes through the fixing hole (4) and the bolt hole arranged correspondingly in sequence to connect the clamping block (112) and the fixed block (2).

4. The pull test fixture of claim 3, wherein, A plurality of the fixing holes (4) are arranged at intervals on the fixing block (2), and a plurality of the bolt holes are arranged at intervals on the clamping portion (11), and the clamping space is located between the adjacent fixing holes (4) and the adjacent bolt holes.

5. The burst test fixture of claim 1, wherein, One side of the clamping block (112) facing the fixing block (2) and one side of the fixing block (2) facing the clamping block (112) are formed with knurling lines.

6. The pull test fixture of any one of claims 1-5, wherein, The tensile test fixture is made of stainless steel or nickel-based alloy.

7. A tensile test apparatus characterized by, Comprising: A tensile testing machine for performing tensile test on a test piece (3); The tensile test fixture according to any one of claims 1-6, which is connected to a chuck of the tensile testing machine.

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