Compression test device

Abstract

The utility model discloses a compression test device which can be adapted to compression tests of test pieces with various complicated sections. The utility model relates to a compression test device, which is used for performing a compression test on a test piece and comprises an upper clamping block, a lower clamping block and a lower clamping block, the lower clamping block is used for clamping the lower part of the test piece; the side surface clamping module is used for clamping a side surface connecting piece of the test piece; the follow-up guide rail assembly is used for enabling the side face clamping module to move along with up-down sliding of the test piece, and the side face clamping module comprises an upper clamping plate and a lower clamping plate which are used for clamping a side face connecting piece of the test piece; the upper hinge and the lower hinge are respectively connected with the upper clamping plate and the lower clamping plate; the adjusting screws are arranged on the upper hinge body and the lower hinge body respectively, and the opening and closing angles of the upper hinge body and the lower hinge body can be adjusted by rotating the adjusting screws.

Description

Technical Field

[0001] The utility model relates to a compression test device used in mechanical tests of various compression materials, in particular to a compression test device used in compression tests of test pieces. Background Art

[0002] Advanced composite materials offer a range of advantages, including high specific strength, high specific modulus, fatigue resistance, corrosion resistance, and strong designability. They can also significantly improve material utilization and reduce structural weight, leading to their increasing application in fields such as aviation and aerospace. The proportion and scope of advanced composite materials used in aircraft structures have become an important indicator of an aircraft's advancement. With the continuous emergence of various new functional composite materials, the use of composite materials in various aircraft structures continues to grow. With the continuous improvement of composite material performance, their application in aircraft has expanded from initial non-load-bearing structures to primary load-bearing structures such as the fuselage and wings, and the percentage of composite materials used in the overall aircraft material content has also continued to increase.

[0003] As the requirements for material performance in aircraft structures continue to increase, more and more composite materials, metal materials, and hybrid structural materials are being applied to different aircraft structures. This has led to a large number of testing requirements to verify the mechanical properties of new materials. Compression testing is a key test for assessing material configurations to ensure the compression performance of different parts of the structure and different materials.

[0004] However, the compression test equipment currently used is mainly used in the test of standard configuration plates, and its application scope is relatively limited. It has three main shortcomings:

[0005] 1. The scope of application is relatively limited. It is only applicable to standard plates and cannot adapt to complex cross-sections, such as V-shaped, I-shaped, and T-shaped profiles. In addition, traditional test equipment is prone to out-of-plane displacement of the web during loading of complex cross-sections, resulting in invalid test results.

[0006] 2. Poor alignment cannot guarantee the alignment accuracy of the compression specimen. The specimen is very likely to buckle when loaded, resulting in premature instability and failure, leading to abnormal test results. Commonly used alignment methods, such as line alignment, have problems such as large deviations in operation by different operators, high requirements for personnel experience, and poor accuracy.

[0007] 3. Stress concentration at the ends causes end damage, rendering the test invalid.

[0008] In view of the shortcomings of traditional testing equipment, it is urgent to design a new compression testing equipment to adapt to the compression tests of various complex cross-section test pieces. Utility Model Content

[0009] The present invention is completed in view of the above problems, and its purpose is to provide a compression testing device that can adapt to compression tests of test pieces with various complex cross-sections.

[0010] In order to achieve the above-mentioned purpose, the utility model provides a compression testing device for conducting a compression test of a test piece, comprising: an upper clamping block, wherein the upper clamping block is used to clamp the upper part of the test piece; a lower clamping block, wherein the lower clamping block is used to clamp the lower part of the test piece; a side clamping module, wherein the side clamping module is used to clamp the side connecting piece of the test piece; and a follower guide rail assembly, wherein the follower guide rail assembly is used to enable the side clamping module to move as the test piece slides up and down, wherein the side clamping module comprises: an upper clamping plate and a lower clamping plate for clamping the side connecting piece of the test piece; an upper hinge and a lower hinge respectively connected to the upper clamping plate and the lower clamping plate; and an adjusting screw respectively arranged on the upper hinge and the lower hinge, and the opening and closing angles of the upper hinge and the lower hinge can be adjusted by rotating the adjusting screw.

[0011] According to the compression test device of the present invention, the side connector of the test piece is placed between the upper clamping plate and the lower clamping plate. According to the configuration of the side connector, the opening and closing angles of the upper hinge and the lower hinge are adjusted by turning the adjusting screw. The side connector can be clamped at any angle of 0°-90°, and at the same time, it plays an anti-warping role and can adapt to the compression test of test pieces with various complex cross-sections. That is, it is possible to provide a universal compression test device that can be applied to test scenarios such as compression tests and post-impact compression tests of various small non-standard structural parts. It has good configuration adaptability and is particularly suitable for compression tests of non-standard components of composite materials with various configurations, such as test pieces with complex interface configurations such as adhesive bonding, co-curing, and bolt connections. The compression test device of the present invention can be used to obtain the allowable values ​​and failure modes of test pieces with different cross-sectional forms and different thicknesses, assess the strength performance of various complex profiles, and provide data support for the configuration design and application of materials.

[0012] Preferably, the follower guide rail assembly includes a linear guide rail and a linear bearing installed on the linear guide rail, and the side clamping module is connected to the linear guide rail through the linear bearing.

[0013] The compression testing device of this utility model reduces friction by utilizing rolling friction instead of sliding friction, as the side clamping modules pass through the linear guide rails via linear bearings. Furthermore, during the compression test, the side clamping modules rotate via the balls within the linear bearings, floating on the linear guide rails as the test piece is compressed. This prevents warping while ensuring that no additional force is applied to interfere with the test, effectively improving the accuracy and reliability of the test.

[0014] Preferably, the follower guide rail assembly further comprises a guide rail support mounted on the linear guide rail, and the follower guide rail assembly is fixed to the lower clamping block via the guide rail support.

[0015] According to the compression testing device of the present invention, the follower guide rail assembly can be easily installed.

[0016] Preferably, the upper clamping block includes: an upper floating clamping pin for clamping the upper part of the test piece; and an upper floating spring installed on the upper floating clamping pin, and the upper part of the test piece is adaptively clamped by the upper floating spring using the upper floating clamping pin to center the upper part of the test piece. The lower clamping block includes: a lower floating clamping pin for clamping the lower part of the test piece; and a lower floating spring installed on the lower floating clamping pin, and the lower part of the test piece is adaptively clamped by the lower floating spring using the lower floating clamping pin to center the lower part of the test piece.

[0017] According to the compression test device of the utility model, the floating tightening pin can be used to adaptively clamp the test piece through the floating spring to play a centering role.

[0018] and a first clamping screw for adjusting the lower end of the lower end of the test piece, wherein the lower end clamping block is divided into two parts on both sides of the test piece, and the upper end clamping block is adjusted to clamp the upper end of the test piece by observing the upper side scale ruler. The lower clamping block further comprises: a lower end clamping block for clamping the lower end of the test piece; a lower side scale ruler is provided on the side of the lower clamping block in a manner located at the edge of the lower end clamping block; and a first lower clamping screw for adjusting the lower end clamping block, the lower end clamping block is divided into two parts on both sides of the test piece, and the lower end clamping block is clamped by observing the lower side scale ruler by adjusting the lower end clamping block.

[0019] According to the compression test device of the present invention, the upper end clamping block and the lower end clamping block are divided into two pieces on both sides of the test piece. On the basis of centering, observation is performed using the upper side scale ruler and the lower side scale ruler. By adjusting the first upper clamping screw and the first lower clamping screw to clamp the end of the test piece, the test piece can be clamped while preventing the end of the test piece from cracking.

[0020] Preferably, the upper clamping block includes: an upper clamping block box body for accommodating the upper part of the test piece; and two upper reinforcing bars which are arranged on both sides of the width direction of the upper clamping block box body and extend in the up and down directions through a plurality of second upper clamping screws. By adjusting the second upper clamping screws, the two upper reinforcing bars are used to limit the outward displacement of the test piece to play an anti-bending role.

[0021] According to the compression test device of the present invention, the upper reinforcing strip can limit the outward displacement of the test piece by adjusting the second upper clamping screw, thereby playing an anti-bending role.

[0022] Preferably, the upper clamping block further comprises an anti-bending plate provided on the upper clamping block box body and extending along the width direction of the upper clamping block box body.

[0023] According to the compression test device of the present invention, the anti-bending plate can be used to further limit the outward displacement of the test piece, thereby playing an anti-bending role.

[0024] Preferably, the lower clamping block includes: a lower clamping block box body for accommodating the lower part of the test piece; two through-reinforced bars which are arranged on both sides of the width direction of the lower clamping block box body through a plurality of second lower clamping screws and extend to the upper clamping block in the up-down direction; and two lower reinforcing bars which are arranged on both sides of the thickness direction of the lower clamping block box body through a plurality of third lower clamping screws and extend in the up-down direction. By adjusting the second lower clamping screws and the third lower clamping screws, the two through-reinforced bars and the two lower reinforcing bars are used to limit the outward displacement of the test piece to play an anti-bending role.

[0025] According to the compression test device of the present invention, the lower reinforcing bar and the through reinforcing bar can limit the outward displacement of the test piece by adjusting the second lower clamping screw and the third lower clamping screw, thereby playing an anti-bending role. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] FIG1( a ) is a front view schematically showing a compression testing device according to an embodiment of the present invention.

[0027] FIG1( b ) is a side view schematically showing a compression testing device according to an embodiment of the present invention.

[0028] FIG2( a ) is a side view schematically showing an upper clamping block included in the compression testing device according to an embodiment of the present invention.

[0029] FIG2( b ) is a front view schematically showing an upper clamping block included in the compression testing device according to the embodiment of the present invention.

[0030] FIG3( a ) is a front view schematically showing a follower rail assembly included in the compression testing device according to the embodiment of the present invention.

[0031] FIG3( b ) is a side view schematically showing a follower rail assembly included in the compression testing device according to an embodiment of the present invention.

[0032] FIG3( c ) is a top view schematically showing the follower rail assembly included in the compression testing device according to the embodiment of the present invention.

[0033] Figure 4 It is a perspective view schematically showing a side clamping module included in the compression testing device according to the embodiment of the present invention.

[0034] FIG5(a) is a front view schematically showing a lower clamping block included in the compression testing device according to the embodiment of the present invention.

[0035] FIG5( b ) is a side view schematically showing a lower clamping block included in the compression testing device according to the embodiment of the present invention.

[0036] (Explanation of Symbols)

[0037] 10 Compression test device

[0038] 1 Upper clamp

[0039] 1-1 Upper Wedge

[0040] 1-2 Upper locking nut

[0041] 1-3 Upper clamp box

[0042] 1-4 Upper clamping screw

[0043] 1-5 upper floating clamping pins

[0044] 1-6 upper floating spring

[0045] 1-7 upper reinforcement strips

[0046] 1-8 Anti-bending plate

[0047] 1-9 Upper end clamping block

[0048] 1-10 Upper side scale

[0049] 2 Side clamping modules

[0050] 2-1 Upper hinge

[0051] 2-2 Upper splint

[0052] 2-3 Adjusting screw

[0053] 2-4 Lower splint

[0054] 2-5 Lower hinge

[0055] 2-6 bearing hole

[0056] 3 Follower rail assembly

[0057] 3-1 Linear Bearings

[0058] 3-2 Linear Guides

[0059] 3-3 Guide rail support

[0060] 4 Lower clamp

[0061] 4-1 Lower wedge

[0062] 4-2 Lower lock nut

[0063] 4-3 Lower clamp box

[0064] 4-4 Lower end clamping block

[0065] 4-5 Through reinforcement strips

[0066] 4-6 Lower clamping screw

[0067] 4-7 Lower floating spring

[0068] 4-8 lower floating clamping pins

[0069] 4-9 Lower reinforcement strip DETAILED DESCRIPTION

[0070] Various embodiments of the present invention will now be described in detail, examples of which are shown in the accompanying drawings and described below. Although the present invention will be described in conjunction with exemplary embodiments, it should be appreciated that this description is not intended to limit the present invention to those exemplary embodiments. On the contrary, the present invention is intended to cover not only those exemplary embodiments, but also various alternatives, modifications, equivalents, and other embodiments that may be included within the spirit and scope of the present invention as defined by the appended claims.

[0071] Next, combine Figure 1(a) to Figure 5(b) A compression testing device 10 according to an embodiment of the present invention will be described.

[0072] Figure 1(a) is a schematic front view of a compression test device 10 according to an embodiment of the present invention. Figure 1(b) is a schematic side view of a compression test device 10 according to an embodiment of the present invention. Figure 2(a) is a schematic side view of an upper clamping block 1 included in the compression test device 10 according to an embodiment of the present invention. Figure 2(b) is a schematic front view of an upper clamping block 1 included in the compression test device 10 according to an embodiment of the present invention. Figure 3(a) is a schematic front view of a follower guide rail assembly 3 included in the compression test device 10 according to an embodiment of the present invention. Figure 3(b) is a schematic side view of a follower guide rail assembly 3 included in the compression test device 10 according to an embodiment of the present invention. Figure 3(c) is a schematic top view of a follower guide rail assembly 3 included in the compression test device 10 according to an embodiment of the present invention. Figure 4 FIG5( a ) is a perspective view schematically showing the side clamping module 2 included in the compression test apparatus 10 according to an embodiment of the present invention. FIG5( a ) is a front view schematically showing the lower clamping block 4 included in the compression test apparatus 10 according to an embodiment of the present invention. FIG5( b ) is a side view schematically showing the lower clamping block 4 included in the compression test apparatus 10 according to an embodiment of the present invention.

[0073] In this specification, all terms related to orientation are based on the installed and used state of the compression testing device 10, that is, the state shown in Figure 1(a).

[0074] (Overall Structure of Compression Tester 10)

[0075] The overall structure of a compression testing device 10 according to an embodiment of the present invention will be described below mainly with reference to FIG. 1( a ) and FIG. 1 ( b ).

[0076] The compression testing device 10 of the present invention is mainly used for mechanical testing of various types of compressible materials, especially for compression testing of test pieces.

[0077] As shown in Figures 1(a) and 1(b), the compression testing device 10 includes: an upper clamping block 1, which is used to clamp the upper part of the test piece; a lower clamping block 4, which is used to clamp the lower part of the test piece; a side clamping module 2, which is used to clamp the side connecting member (not shown) of the test piece; and a follower guide rail assembly 3, which is used to enable the side clamping module 2 to move as the test piece slides up and down.

[0078] Specifically, in this embodiment, as shown in Figures 1(a) and 1(b), in the length direction of the compression testing device 10 (the up and down direction in Figure 1(a)), the side clamping module 2 is arranged between the upper clamping block 1 and the lower clamping block 4, and the follower guide rail assembly 3 is arranged on both sides of the width direction of the compression testing device 10 (the left and right direction in Figure 1(a)), and the side clamping module 2 is fixed to the lower clamping block 4 through the follower guide rail assembly 3.

[0079] (Structure of upper clamping block 1)

[0080] 2( a ) and 2 ( b ), the structure of the upper clamping block 1 included in the compression testing device 10 according to the embodiment of the present invention will be described.

[0081] The upper clamping block 1 is used to be clamped in the upper clamping wedge block (not shown) of the testing machine to clamp the upper part of the test piece.

[0082] As shown in Figures 2(a) and 2(b), the upper clamping block 1 includes: an upper wedge block 1-1 located at the top; an upper locking nut 1-2 located below the upper wedge block 1-1; an upper clamping block box body 1-3 located below the upper locking nut 1-2; a plurality of upper clamping screws 1-4 arranged on the upper clamping block box body 1-3; a plurality of upper floating clamping nails 1-5 arranged on the upper clamping block box body 1-3; a plurality of upper floating springs 1-6 installed on the plurality of upper floating clamping nails 1-5; an upper reinforcing strip 1-7 arranged on the upper clamping block box body 1-3; an anti-bending plate 1-8 arranged on the upper clamping block box body 1-3; an upper end clamping block 1-9 arranged in the upper clamping block box body 1-3; and an upper side scale ruler 1-10 arranged on the side of the upper clamping block 1 (upper clamping block box body 1-3) in a manner of being located on the edge of the upper end clamping block 1-9, etc.

[0083] Specifically, the upper wedge 1-1 is used to be clamped in the upper clamp wedge of the testing machine and locked by the upper locking nut 1-2. The upper clamp box 1-3 accommodates the upper part of the test piece, and the upper part of the test piece is placed in the upper clamp box 1-3.

[0084] The upper floating clamping pins 1-5 are arranged on the front and rear surfaces of the upper clamping block box body 1-3 in the thickness direction of the compression test device 10 (the direction perpendicular to the paper surface in Figure 1(a)), that is, the front-to-back direction. The upper floating clamping pins 1-5 are used to clamp the upper part of the test piece. The upper floating springs 1-6 are installed at the root of each upper floating clamping pin 1-5. The upper floating clamping pins 1-5 adaptively clamp the upper part of the test piece through the upper floating springs 1-6 to center the upper part of the test piece.

[0085] The upper end clamping block 1-9 is arranged inside the upper side of the upper clamping block box body 1-3, and is divided into two blocks on both sides of the test piece in the front-to-back direction, and is used to clamp the upper end of the test piece. An upper side scale ruler 1-10 is provided on the upper edge of the two upper end clamping blocks 1-9. An upper clamping screw 1-4 (first upper clamping screw) for adjusting the two upper end clamping blocks 1-9 is provided corresponding to the two upper end clamping blocks 1-9. By observing the upper side scale ruler 1-10, the upper end clamping block 1-9 is adjusted using the upper clamping screw 1-4 (first upper clamping screw) to clamp the upper end of the test piece. Therefore, on the basis of centering, the upper side scale ruler 1-10 is used for observation, and the upper end of the test piece is clamped by adjusting the upper clamping screw 1-4 (first upper clamping screw), which can prevent the upper end of the test piece from cracking while clamping the test piece.

[0086] The two upper reinforcing bars 1-7 are arranged on both sides of the width direction of the upper clamping block box body 1-3 through multiple upper clamping screws 1-4 (second upper clamping screws) and extend in the up and down directions. By adjusting the upper clamping screws 1-4 (second upper clamping screws), the two upper reinforcing bars 1-7 are used to limit the outward displacement of the test piece and play an anti-bending role.

[0087] The anti-bending plate 1-8 extends along the width direction of the upper clamping block box body 1-3. The anti-bending plate 1-8 can further limit the outward displacement of the test piece and play an anti-bending role.

[0088] (Structure of follower guide rail assembly 3)

[0089] The structure of the follower guide rail assembly 3 included in the compression testing device 10 according to the embodiment of the present invention will be described below mainly with reference to FIG. 3( a ), FIG. 3 ( b ), and FIG. 3 ( c ).

[0090] The follower guide rail assembly 3 is fixed on the lower clamping block 4 and is used to enable the side clamping module 2 to move along with the upward and downward sliding of the test piece.

[0091] The follower guide rail assembly 3 includes two linear guide rails 3-2 disposed on either side of the compression tester 10 in the width direction; two linear bearings 3-1 mounted on each of the linear guide rails 3-2; and guide rail supports 3-3 mounted on the linear guide rails 3-2. In this embodiment, four guide rail supports 3-3 are provided, but the number of guide rail supports 3-3 is not limited to this and can be set according to specific needs.

[0092] The follower guide rail assembly 3 is fixed to the lower clamping block 4 by, for example, fastening screws and a guide rail support 3 - 3 , and is connected to the side clamping module 2 by a linear bearing 3 - 1 , mainly providing a sliding track therefor.

[0093] (Structure of side clamping module 2)

[0094] The following are the main references Figure 4 The structure of the side clamping module 2 included in the compression testing device 10 according to the embodiment of the present invention will be described.

[0095] The side clamping module 2 is connected to the linear guide rail 3-2 through the linear bearing 3-1 and is used to clamp the side connector of the test piece.

[0096] like Figure 4 As shown, the side clamping module 2 includes: an upper clamping plate 2-2 and a lower clamping plate 2-4 for clamping the side connector of the test piece; an upper hinge 2-1 and a lower hinge 2-5 respectively connected to the upper clamping plate 2-2 and the lower clamping plate 2-4; and an adjusting screw 2-3 respectively arranged on the upper hinge 2-1 and the lower hinge 2-5. By rotating the adjusting screw 2-3, the opening and closing angles of the upper hinge 2-1 and the lower hinge 2-5 can be adjusted.

[0097] Specifically, the two upper splints 2-2 are connected to the two ends of the upper hinge 2-1, and the two lower splints 2-4 are connected to the two ends of the lower hinge 2-5. The upper hinge 2-1 and the lower hinge 2-5 are both composed of two folded plates. The adjusting screw 2-3 is set on one of the two folded plates constituting the upper hinge 2-1 and the lower hinge 2-5. By rotating the adjusting screw 2-3, it pushes the other of the two folded plates constituting the upper hinge 2-1 and the lower hinge 2-5 to adjust the opening and closing angles of the upper hinge 2-1 and the lower hinge 2-5.

[0098] That is, the side connector of the test piece is placed between the upper clamping plate 2-2 and the lower clamping plate 2-4. According to the configuration of the side connector of the test piece, the opening and closing angles of the upper hinge 2-1 and the lower hinge 2-5 are adjusted by turning the adjusting screw 2-3, and the side connector of the test piece can be clamped at any angle between 0° and 90°.

[0099] Furthermore, bearing holes 2-6 are provided on the upper and lower clamping plates 2-2 and 2-4 for the linear bearings 3-1 of the follower guide rail assembly 3. Specifically, the upper and lower clamping plates 2-2 and 2-4 extend through the linear guide rail 3-2 via the linear bearings 3-1. During the compression test, the side clamping module 2 rotates via the balls within the linear bearings 3-1, floating on the linear guide rail 3-2 as the test piece is compressed. This prevents warping while ensuring that no additional force is applied to interfere with the test, effectively improving the accuracy and reliability of the test.

[0100] (Structure of lower clamping block 4)

[0101] 5( a ) and 5 ( b ), the structure of the lower clamping block 4 included in the compression testing device 10 according to the embodiment of the present invention will be described.

[0102] The lower clamping block 4 is used to be clamped in the lower clamping wedge block (not shown) of the testing machine to clamp the lower part of the test piece.

[0103] As shown in Figures 5(a) and 5(b), the lower clamping block 4 includes: a lower wedge block 4-1 located at the bottom; a lower locking nut 4-2 located above the lower wedge block 4-1; a lower clamping block box body 4-3 located above the lower locking nut 4-2; a lower end clamping block 4-4 arranged in the lower clamping block box body 4-3; a through reinforcing strip 4-5 arranged in the lower clamping block box body 4-3; a plurality of lower clamping screws 4-6 arranged in the lower clamping block box body 4-3; a plurality of lower floating clamping nails 4-8 arranged in the lower clamping block box body 4-3; a plurality of lower floating springs 4-7 installed on the plurality of lower floating clamping nails 4-8; a lower reinforcing strip 4-9 arranged in the lower clamping block box body 4-3; and a lower side scale ruler (not shown) arranged on the side of the lower clamping block 4 (lower clamping block box body 4-3) in a manner of being located at the edge of the lower end clamping block 4-4.

[0104] Specifically, the lower wedge 4-1 is used to be clamped in the lower clamp wedge of the testing machine and locked by the lower locking nut 4-2. The lower clamp box 4-3 accommodates the lower part of the test piece, and the lower part of the test piece is placed in the lower clamp box 4-3.

[0105] The lower floating clamping pins 4-8 are arranged on the front and rear surfaces of the lower clamping block box body 4-3 in the thickness direction of the compression test device 10 (the direction perpendicular to the paper surface in Figure 1 (a)), that is, the front-to-back direction. The lower floating clamping pins 4-8 are used to clamp the lower part of the test piece. The lower floating springs 4-7 are installed at the root of each lower floating clamping pin 4-8. The lower floating clamping pins 4-8 adaptively clamp the lower part of the test piece through the lower floating springs 4-7 to center the lower part of the test piece.

[0106] The lower end clamping block 4-4 is arranged inside the lower side of the lower clamping block box body 4-3 and is divided into two blocks on both sides of the test piece in the front-to-back direction, and is used to clamp the lower end of the test piece. A lower side scale is provided on the lower edge of the two lower end clamping blocks 4-4. Corresponding to the two lower end clamping blocks 4-4, a lower clamping screw 4-6 (first lower clamping screw) for adjusting the two lower end clamping blocks 4-4 is provided. By observing the lower side scale, the lower end clamping block 4-4 is adjusted using the lower clamping screw 4-6 (first lower clamping screw) to clamp the lower end of the test piece. Thus, on the basis of alignment, observation is made using the lower side scale, and the lower end of the test piece is clamped by adjusting the lower clamping screw 4-6 (first lower clamping screw), which can prevent the lower end of the test piece from cracking while clamping the test piece.

[0107] Two through-reinforced bars 4-5 are provided on either side of the lower clamping block body 4-3 in the width direction via multiple lower clamping screws 4-6 (second lower clamping screws) and extend vertically to the upper clamping block 1. Two lower reinforcing bars 4-9 are provided on either side of the lower clamping block body 4-3 in the thickness direction via multiple lower clamping screws 4-6 (third lower clamping screws) and extend vertically. By adjusting the lower clamping screws 4-6 (second lower clamping screws and third lower clamping screws), the two through-reinforced bars 4-5 and the two lower reinforcing bars 4-9 are utilized to limit outward displacement of the test piece, thereby preventing bending. In particular, the two through-reinforced bars 4-5 can clamp the test piece from top to bottom, preventing bending.

[0108] (Assembly and Use of Compression Tester 10)

[0109] The following describes the assembly and use of the compression testing device 10 of the present invention.

[0110] The compression test device 10 of the present invention includes an upper clamping block 1, a side clamping module 2, a follower guide rail assembly 3, and a lower clamping block 4. The upper clamping block 1 is clamped to the upper clamp of the testing machine through the upper wedge block 1-1 and the upper locking nut 1-2, and the upper part of the test piece is placed in the upper clamping block box 1-3. The upper floating clamping pin 1-5 adaptively clamps the test piece through the upper floating spring 1-6, playing a centering role. The upper end clamping block 1-9 is divided into two pieces on both sides of the test piece. On the basis of centering, the upper side scale 1-10 is used for observation. The upper end of the test piece is clamped by adjusting the upper clamping screw 1-4. While clamping the test piece, it also plays a role in preventing the upper end of the test piece from cracking. The upper reinforcing bar 1-7 limits the outward displacement of the test piece by adjusting the upper clamping screw 1-4, playing a role in preventing bending. At this point, the clamping of the upper part of the test piece is completed.

[0111] The side clamping module 2 is connected to the follower guide rail assembly 3 through the linear bearing 3-1 and floats on the linear guide rail 3-2 along with the test piece. The follower guide rail assembly 3 is fixed to the lower clamping block 4 through the guide rail support 3-3.

[0112] The lower clamping block 4 is clamped to the lower chuck of the testing machine. The lower portion of the test piece is placed within the lower clamping block housing 4-3. The lower floating clamping pin 4-8 adaptively clamps the test piece via the floating spring 4-7, providing centering. The lower end clamping block 4-4 is divided into two sections, separated by the test piece. Based on centering, the lower side scale (not shown) is used for observation. The lower end of the test piece is clamped by adjusting the lower clamping screw 4-6. This clamping action prevents cracking at the lower end of the test piece. The lower reinforcing bar 4-9 and the through reinforcing bar 4-5 are adjusted by the lower clamping screw 4-6 to limit the outward displacement of the test piece, providing anti-bending protection. The lower portion of the test piece is now clamped.

[0113] Finally, adjust the side clamping module 2, placing the side connector of the test piece between the upper clamping plate 2-2 and the lower clamping plate 2-4. Depending on the configuration of the side connector, the opening and closing angles of the upper hinge 2-1 and the lower hinge 2-5 are adjusted by turning the adjustment screw 2-3, allowing the side connector to be clamped at any angle between 0° and 90°. The side clamping module 2 is connected to the linear guide 3-2 via a linear bearing 3-1. During the compression test, the side clamping module 2 rotates via the balls within the linear bearing 3-1, floating on the linear guide 3-2 as the test piece is compressed. This prevents warping while ensuring that no additional force is applied to interfere with the test, effectively improving the accuracy and reliability of the test.

[0114] For example, the compression test device 10 of the present invention can be installed on a static or fatigue material testing machine and used in conjunction with the test machine's built-in flat wedges. During installation, the test piece is first assembled with the compression test device 10. The lower chuck of the test machine is then connected to the lower wedge 4-1 of the lower clamping block 4. The upper chuck of the test machine is then connected to the upper wedge 1-1 of the upper clamping block 1. The loading end of the test piece is then moved downward at a constant rate, compressing the test piece until the test is terminated.

[0115] (Technical Effects of the Compression Test Device 10 of the Present Utility Model)

[0116] The compression test device 10 of the present invention can be applied to compression tests of various small non-standard structural parts, post-impact compression tests and other test scenarios. It has good configuration adaptability and is particularly suitable for compression tests of non-standard components of various composite materials, such as test pieces with complex cross-sectional configurations such as those bonded, co-cured, and bolted, such as V-shaped, I-shaped, and T-shaped. It avoids the waste of resources caused by repeated manufacturing of fixtures, has a wide range of applications, and has a large market demand. At the same time, the compression test device 10 of the present invention can enhance the competitiveness of laboratories in contracting test projects and increase economic benefits.

[0117] Although the structure and working principle of the present invention have been described above in conjunction with preferred embodiments, those skilled in the art should recognize that the above examples are for illustration only and are not intended to limit the present invention. Therefore, modifications and variations may be made to the present invention within the spirit of the claims, and such modifications and variations will fall within the scope of the claims.

Claims

1. A compression test apparatus for performing a compression test on a test piece, comprising: an upper clamping block, the upper clamping block being used to clamp the upper portion of the test piece; A lower clamping block, the lower clamping block is used to clamp the lower part of the test piece; a side clamping module, the side clamping module being used to clamp the side connector of the test piece; and A follower rail assembly, wherein the follower rail assembly is used to enable the side clamping module to move as the test piece slides up and down. It is characterized by: The side clamping module comprises: an upper clamping plate and a lower clamping plate for clamping the side connectors of the test piece; An upper hinge and a lower hinge connected to the upper and lower splints respectively; and The adjusting screws are respectively arranged on the upper hinge and the lower hinge, By rotating the adjusting screw, the opening and closing angles of the upper hinge and the lower hinge can be adjusted.

2. The compression test device according to claim 1, wherein: The follower guide rail assembly includes a linear guide rail and a linear bearing installed on the linear guide rail. The side clamping module is connected to the linear guide rail through the linear bearing.

3. The compression test device according to claim 2, wherein: The follower guide rail assembly also includes a guide rail support mounted on the linear guide rail. The follower guide rail assembly is fixed on the lower clamping block through the guide rail support.

4. The compression test device according to claim 1, wherein: The upper clamping block includes: an upper floating clamping pin for clamping the upper part of the test piece; and an upper floating spring installed on the upper floating clamping pin, The upper floating clamping pin is used to adaptively clamp the upper portion of the test piece through the upper floating spring to center the upper portion of the test piece. The lower clamping block includes: a lower floating clamping pin for clamping the lower portion of the test piece; and a lower floating spring mounted on the lower floating clamping pin. The lower portion of the test piece is adaptively clamped by the lower floating clamping pin through the lower floating spring to center the lower portion of the test piece.

5. The compression test device according to claim 4, wherein: The upper clamping block further includes: an upper end clamping block for clamping the upper end of the test piece; an upper side scale provided on the side of the upper clamping block in a manner located at the edge of the upper end clamping block; and a first upper clamping screw for adjusting the upper end clamping block. The upper end clamping block is divided into two parts on both sides of the test piece. By observing the upper side scale, the upper end clamping block is adjusted using the first upper clamping screw to clamp the upper end of the test piece. The lower clamping block further includes: a lower end clamping block for clamping the lower end of the test piece; a lower side scale provided on the side of the lower clamping block in a manner located at the edge of the lower end clamping block; and a first lower clamping screw for adjusting the lower end clamping block. The lower end clamping block is divided into two parts on both sides of the test piece. By observing the lower side scale, the lower end clamping block is adjusted using the first lower clamping screw to clamp the lower end of the test piece.

6. The compression testing device according to claim 1, wherein: The upper clamping block includes: an upper clamping block box body for accommodating the upper portion of the test piece; and two upper reinforcing bars provided on both sides of the width direction of the upper clamping block box body and extending in the vertical direction through a plurality of second upper clamping screws. By adjusting the second upper clamping screw, the two upper reinforcing strips are used to limit the outward displacement of the test piece, thereby playing an anti-bending role.

7. The compression test device according to claim 6, wherein: The upper clamping block further includes an anti-bending plate which is arranged on the upper clamping block box body and extends along the width direction of the upper clamping block box body.

8. The compression testing device according to claim 1, wherein: The lower clamping block includes: a lower clamping block box body for accommodating the lower part of the test piece; two penetrating reinforcing bars provided on both sides of the width direction of the lower clamping block box body and extending to the upper clamping block in the vertical direction through a plurality of second lower clamping screws; and two lower reinforcing bars provided on both sides of the thickness direction of the lower clamping block box body and extending in the vertical direction through a plurality of third lower clamping screws. By adjusting the second lower clamping screw and the third lower clamping screw, the two through reinforcing bars and the two lower reinforcing bars are used to limit the outward displacement of the test piece, thereby playing an anti-bending role.

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