Breakage test method of bent plate

Abstract

The invention discloses a bending plate fracture test method and a fracture test auxiliary device, and belongs to the technical field of bending plate fracture tests. The technical problem that loading force cannot be applied to the bending plate due to the fact that the loading point of the bending plate is not on the bending plate body is solved. The fracture test method for the bent plate comprises the following steps: S1, positioning a loading point of a test, and determining the position of a loading plate; establishing a coordinate O (X, Y, Z) on the table top of the workbench, wherein the coordinate at the center of the table top of the workbench is (0, 0, 0); s2, the positions of a bending plate, a shape follow-up block, a first connecting plate, a second connecting plate, a third connecting plate and an adapter plate are determined, and mounting and fixing are conducted; and S3, applying a loading force to the bending plate through the loading plate according to design requirements, researching a fracture mode of the bending plate, and completing a fracture test. The bending plate fracture test device realizes the fracture test of the bending plate of which the loading point is not on the bending plate body, and can be used for researching the fracture mode of the bending plate at different loading positions.

Description

Technical Field

[0001] The invention relates to the technical field of fracture test of bent plates, and in particular to a fracture test method of bent plates. Background Art

[0002] During the bending process of a certain product, the bending plate may suffer from torsional fracture under the action of comprehensive load, which is different from the bending fracture along the fracture groove required by the design state, thus affecting the separation posture and speed of the protective cover and endangering the safety of the protective cover separation. Therefore, it is necessary to study the fracture mode of the bent plate at different loading positions (i.e. bending fracture or torsional fracture).

[0003] The bending plate breaking test needs to be completed on the workbench. The bending plates of existing products are usually regular rectangular plates, with the length and width within the range of the workbench (the workbench X-direction stroke is 420, the Y-direction stroke is 150), and the loading point is on the bending plate body, such as Figure 1 As shown. For some products, the bending plate is an irregular long plate. At the same time, the bending plate is long, and the loading point required by the design is outside the bending plate body (to simulate the protection cover separation test). Therefore, it is impossible to directly apply the load force to the expected loading point, and it is necessary to connect the bending plate through a set of transfer auxiliary devices to meet the test requirements. Summary of the invention

[0004] In view of the above analysis, the present invention aims to provide a fracture test method for a bent plate, so as to solve the problem that the existing fracture test method cannot be applied to fracture tests where the loading point is not on the bent plate body.

[0005] The purpose of the present invention is mainly achieved through the following technical solutions:

[0006] The present invention provides a bending plate fracture test method, comprising the following steps:

[0007] The bending plate is an irregular long plate. The loading point required by the design is not on the bending plate body. Along the length direction of the bending plate, the middle of the bending plate is a plane section, and the two ends are respectively a first curved surface end and a second curved surface end; a breaking groove is provided on the plane section of the bending plate;

[0008] S1. Locate the loading point of the test and determine the position of the loading plate;

[0009] Establish coordinates O (X, Y, Z) on the workbench surface, and the coordinates at the center of the workbench surface are (0, 0, 0);

[0010] S2, determine the positions of the bending plate, the follower block, the first connecting plate, the second connecting plate, the third connecting plate and the adapter plate, and install and fix them;

[0011] S3. Apply load to the bent plate through the loading plate according to the design requirements, study the fracture mode of the bent plate, and complete the fracture test.

[0012] Furthermore, in step S1, a positioning plate is arranged on the workbench surface, a positioning threaded through hole is arranged on the positioning plate, and the positioning plate is fixedly connected to the workbench via fixing bolts in the positioning threaded through hole.

[0013] Further, in step S1, the X and Y direction positions of the center of the positioning threaded through hole on the positioning plate coincide with the X and Y direction positions of the center of the workbench.

[0014] Further, in step S1, the loading plate is moved so that the loading point coincides with the positioning threaded through hole of the positioning plate in the X and Y directions. After the loading point is positioned, the position of the loading plate is determined.

[0015] Furthermore, in step S2, the positions of the bending plate, the conforming block, the first connecting plate, the second connecting plate, the third connecting plate and the adapter plate are determined according to the position of the loading plate.

[0016] Furthermore, in step S2, the loading plate is connected to the second curved surface end of the bending plate, and the conformal block is fixed on the first curved surface end of the bending plate.

[0017] Furthermore, in step S2, a first connecting plate is used to fix the first curved end of the bending plate, and the first connecting plate is arranged on the top surface of the second connecting plate; a third connecting plate is protrudingly provided on one side of the second connecting plate adjacent to the adapter plate, and the third connecting plate is connected to the adapter plate.

[0018] Further, in step S2, after the position of the adapter plate is determined, the adapter plate and the positioning plate are connected, and at the same time, the bottom surface of the second connecting plate is supported by the workbench, and the bending test auxiliary device is installed.

[0019] Further, S4 is included;

[0020] S4. Switch the loading point required by the next test, and reinstall the fracture test auxiliary device according to the switched loading point;

[0021] The present invention also provides a bending plate fracture test auxiliary device, which is used to implement the bending plate fracture test method mentioned above;

[0022] The fracture test auxiliary device comprises a positioning plate, a first connecting plate, a second connecting plate, a third connecting plate, a loading plate and a conforming block.

[0023] The ends are connected and used to apply load forces to them.

[0024] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0025] (1) The present invention provides a plurality of groups of transfer threaded through holes on the transfer plate, each group of transfer threaded through holes corresponds to a different loading point. The present invention can complete the fracture test of multiple loading point positions at one time.

[0026] (2) The present invention designs the loading plate based on the relatively fixed positions of the loading points and the breaking grooves on the bending plate, transfers all the loading points to the loading plate, and uses the loading plate to apply load to the bending plate, thereby solving the problem that the loading points are outside the bending plate body and cannot apply load force.

[0027] (3) The present invention provides a positioning plate, which can facilitate the alignment and positioning of the loading point on the loading plate with the center of the workbench in the X and Y directions, thereby ensuring the accuracy of the test.

[0028] In the present invention, the above-mentioned technical solutions can also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the subsequent description, and some advantages can become obvious from the description, or can be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained through the contents particularly pointed out in the embodiments of the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings are only for the purpose of illustrating particular embodiments and are not to be considered limiting of the present invention. Like reference symbols denote like components throughout the drawings.

[0030] Figure 1 It is a schematic diagram of the existing bent plate structure;

[0031] Figure 2 It is a schematic diagram of the bending plate structure involved in the present invention;

[0032] Figure 3 It is a schematic diagram of the structure where the loading point is outside the bending plate body;

[0033] Figure 4 The structure of the auxiliary tooling for the bending test of the bending plate of the present invention is schematically shown. Figure 1 ;

[0034] Figure 5 The structure of the auxiliary tooling for the bending test of the bending plate of the present invention is schematically shown. Figure 2 ;

[0035] Figure 6 The structure of the auxiliary tooling for the bending test of the bending plate of the present invention is schematically shown. Figure 3 .

[0036] Reference numerals:

[0037] 1-loading plate; 2-loading through hole; 3-bending plate; 4-first curved surface end; 5-second curved surface end; 6-breaking groove; 7-first bending through hole; 8-second bending through hole; 9-conformal block; 10-first connecting plate; 11-second connecting plate; 12-third connecting plate; 13-adapter plate; 14-positioning plate; 15-positioning threaded through hole; 16-first limiting plate; 17-second limiting plate; 18-loading point; 19-adapter threaded through hole. DETAILED DESCRIPTION

[0038] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0039] The existing bending plates are usually regular rectangular plates, whose length and width are within the range of the workbench, and the loading point required by the design is on the bending plate body, such as Figure 1 As shown, the existing bending plate can complete the breaking test without any auxiliary device.

[0040] like Figure 2 As shown, the bending plate 3 of the present invention is an irregular long plate, and the loading point 18 required by the design is not on the bending plate 3 body (such as Figure 3 As shown, the loading point 18 at the circle mark is outside the bending plate 3 body), along the length direction of the irregular bending plate 3, the middle of the bending plate 3 is a plane section, and the two ends are respectively a first curved surface end 4 and a second curved surface end 5, wherein the curvature of the first curved surface end 4 is smaller than the curvature of the second curved surface end 5; a breaking groove 6 is provided on the plane section of the bending plate 3, the breaking groove 6 is close to the first curved surface end 4 of the bending plate 3, and the breaking groove 6 is arranged along the width direction of the bending plate 3 and the opening direction of the breaking groove 6 is upward.

[0041] Since the bending plate 3 of the present invention is a long plate with an irregular shape, and the loading point 18 required by the design is not on the bending plate 3 , it is impossible to directly apply the load force to the expected loading point 18 .

[0042] In order to solve the above problems, the present invention provides a bending plate fracture test method, which specifically comprises the following steps:

[0043] S1, locate the loading point 18 of the test and determine the position of the loading plate 1;

[0044] The coordinates O (X, Y, Z) are established on the workbench surface. The coordinates at the center of the workbench surface are (0, 0, 0). The size of the positioning plate 14 is designed to be 275 mm × 110 mm × 30 mm. The positioning plate 14 is fixed on the workbench surface (during the fracture test, the position of the positioning plate 14 is fixed), and the X and Y direction positions of the center of the positioning threaded through hole 15 on the positioning plate 14 coincide with the X and Y direction positions of the center of the workbench, that is, the coordinate system of the positioning bolt in the positioning threaded through hole 15 is (0, 0, Z), the positioning bolts are limited in both axial and circumferential directions, and a plurality of positioning connection through holes (for example, 4 M6 threaded through holes) are designed on the positioning plate 14 for connection with the adapter plate 13; the loading plate 1 is moved until the coordinates of the loading point 18 on the loading plate 1 are (0, 0, Z), ensuring that the loading point 18 coincides with the positioning threaded through hole 15 of the positioning plate 14 in the X and Y directions (that is, the loading point 18 coincides with the center of the workbench surface in the X and Y directions). After the loading point 18 is positioned, the position of the loading plate 1 is determined;

[0045] S2, determine the positions of the bending plate 3, the follower block 9, the first connecting plate 10, the second connecting plate 11, the third connecting plate 12 and the adapter plate 13 and install and fix them;

[0046] Since the position of the loading point 18 and the breaking groove 6 of the bending plate 3 is relatively fixed, after the loading point 18 is positioned, the position of the loading plate 1 is determined. Since the loading plate 1 is fixedly connected to the bending plate 3, the positions of the bending plate 3, the follower block 9, the first connecting plate 10, the second connecting plate 11, the third connecting plate 12 and the adapter plate 13 are all determined; then, the loading plate 1 is connected to the second curved surface end 5 of the bending plate 3, the follower block 9 is fixed on the first curved surface end 4 of the bending plate 3 (the follower block 9 is fixed to the side of the breaking groove 6 on the bending plate 3, and the follower block 9 is used to simulate the separation cover during the separation test), the first curved surface end 4 of the bending plate 3 is fixed by the first connecting plate 10, and the third connecting plate 12 is fixedly connected to the adapter threaded through hole 19 corresponding to the loading point 18 on the adapter plate 13. At this time, the position of the adapter plate 13 is determined, and the adapter plate 13 is connected to the positioning plate 14. At the same time, the bottom surface of the second connecting plate 11 is supported by the workbench, and the bending test auxiliary device is installed.

[0047] S3, applying a load force to the bending plate 3 through the loading plate 1 according to the design requirements, studying the fracture mode of the bending plate 3, and completing the fracture test;

[0048] S4, switching the loading point 18 required by the next test, and reinstalling the fracture test auxiliary device according to the switched loading point 18;

[0049] S41, positioning the switched loading point 18 and determining the position of the loading plate 1;

[0050] When switching the loading point 18, first find the position of the switched loading point 18 on the loading plate 1, and locate the switched loading point 18 and determine the position of the loading plate 1, and make the X and Y direction positions of the switched loading point 18 coincide with the X and Y direction positions of the center of the M36 threaded hole on the positioning plate 14, that is, the switched loading point 18 coincides with the center of the workbench surface in the X and Y directions (equivalent to moving the loading plate 1 to ensure that the loading point 18 on the loading plate 1 coincides with the center of the positioning threaded hole on the positioning plate 14, that is, coincides with the center of the workbench), and the position of the loading plate 1 is determined;

[0051] S42, adjust the position of the bending plate 3, the follower block 9, the connecting piece and the adapter plate 13 as a whole; after the position of the loading plate 1 is determined, since the relative positions of the bending plate 3, the follower block 9, the first connecting plate 10, the second connecting plate 11, the third connecting plate 12 and the adapter plate 13 are fixed, at this time, it is only necessary to move the positions of the bending plate 3, the follower block 9, the first connecting plate 10, the second connecting plate 11, the third connecting plate 12 and the adapter plate 13 as a whole;

[0052] S43, after the movement, the adapter plate 13 is fixedly connected with the positioning threaded through hole 15 on the positioning plate 14 by using the adapter threaded through hole 19 corresponding to the switched loading point 18, and the whole set of the fracture test auxiliary device is installed.

[0053] S5. Apply a load force to the bent plate 3 through the loading plate 1 according to the design requirements, study the fracture mode of the bent plate 3, and complete the fracture test;

[0054] S6. When the loading point 18 is switched again, steps S4-S5 are repeated.

[0055] Compared with the prior art, the present invention sets multiple groups of transition threaded through holes 19 on the transition plate 13, and each group of transition threaded through holes 19 corresponds to a different loading point 18. The present invention can complete the fracture test of multiple loading points 18 at one time.

[0056] In order to implement the above-mentioned fracture test method, the present invention also provides a fracture test auxiliary device for a bent plate, by means of which the loading point 18 is transferred to the loading plate 1 to meet the fracture test requirements of the bent plate 3 .

[0057] The fracture test auxiliary device of the bending plate 3 of the present invention includes a positioning plate 14, a fixing assembly, a loading plate 1 and a conforming block 9; the positioning plate 14 is arranged on the workbench surface, the fixing assembly is arranged on the positioning plate 14 and is fixedly connected to the bottom surface of the first curved surface end 4 of the bending plate 3, the conforming block 9 is arranged on the top surface of the first curved surface end 4 of the bending plate 3 and conforms to the shape thereof; the loading plate 1 is connected to the second curved surface end 5 of the bending plate 3 and is used to apply a load force thereto.

[0058] Specifically, Figure 4As shown, coordinates O (X, Y, Z) are established on the workbench surface, the coordinates at the center of the workbench surface are (0, 0, 0), and the coordinates of the loading point 18 during the test on the loading plate 1 are (0, 0, Z), that is, the loading point 18 during the test coincides with the center of the workbench in the X and Y directions. Since the relative position of the loading point 18 (X, Y, Z) required by the design and the breaking groove 6 is fixed, and the loading point 18 required by the design must be on the loading plate 1, when the loading point 18 coincides with the center of the workbench in the X and Y directions, the position of the loading plate 1 is determined, and at the same time, the positions of the bending plate 3 and the fixed component are also determined. In addition, the present invention uses a conformal block 9 instead of a protective cover to simulate a protective cover separation test, and the conformal block 9 is arranged on the top surface of the first curved end 4 of the bending plate 3 and conforms to it.

[0059] It should be noted that a plurality of loading through holes 2 are provided on the loading plate 1, a plurality of first bending through holes 7 are provided on the second curved surface end 5 of the bending plate 3, the number of the loading through holes 2 and the first bending through holes 7 are equal and the positions correspond, and the loading plate 1 is bolted to the second curved surface end 5 of the bending plate 3.

[0060] It should also be noted that the positioning plate 14 of the present invention is a horizontally placed rectangular plate, and the size of the positioning plate 14 is 275mm×110mm×30mm. Along the length direction of the positioning plate 14, a positioning threaded through hole 15 is provided at one end of the positioning plate 14, and a positioning bolt is provided in the positioning threaded through hole 15. The positioning plate 14 is connected to the workbench bolt by the positioning bolt; a positioning connecting hole is provided at the other end, and the positioning plate 14 is fixedly connected to the fixing assembly through the positioning connecting hole.

[0061] Compared with the prior art, the present invention sets a positioning threaded through hole 15 on the positioning plate 14, and connects with the workbench by using the positioning bolts in the positioning threaded hole, thereby realizing the fixed connection between the positioning plate 14 and the workbench; the present invention can position the fixing assembly, the loading plate 1 and the follower block 9 through the positioning plate 14.

[0062] In order to facilitate the alignment and positioning of the loading point 18 on the loading plate 1 with the center of the workbench, the X and Y direction positions of the center of the positioning threaded through hole 15 coincide with the X and Y direction positions of the center of the workbench; after the positioning bolt is installed, the center of the positioning bolt coincides with the center of the workbench in the X and Y directions.

[0063] The positioning threaded through hole 15 of the present invention is an M36 threaded hole.

[0064] Compared with the prior art, the present invention designs the loading plate 1 according to the relatively fixed position of the loading point 18 and the breaking groove 6 on the bending plate 3, transfers all the loading points 18 to the loading plate 1, and uses the loading plate 1 to apply load to the bending plate 3, thereby solving the problem that the loading point 18 is outside the bending plate 3 and cannot apply load force; in addition, the present invention arranges the positioning plate 14, which can facilitate the alignment and positioning of the loading point 18 on the loading plate 1 and the center of the workbench in the X and Y directions, thereby ensuring the accuracy of the test; in addition, the present invention uses a fixing component to fix the bending plate 3, thereby ensuring the stability of the bending plate 3 during the breaking test, thereby ensuring the accuracy of the breaking test; furthermore, the present invention designs a follower block 9 at the top of the first curved surface end 4 of the bending plate 3 (the first curved surface end 4 is the end close to the breaking groove 6), and uses the follower block 9 to simulate the protective cover during the protective cover separation test. The follower block 9 has a simple structure and is easy to design.

[0065] It should be emphasized that the design of the present invention requires multiple loading points 18, and the relative position of each loading point 18 and the breaking groove 6 of the bending plate 3 is fixed (that is, each loading point 18 has its own known coordinates (X, Y) relative to the breaking groove 6); in addition, when designing the recording plate, it is necessary to ensure that all loading points 18 required by the design must be on the loading plate 1, and it is necessary to ensure that by moving the loading plate 1, the X, Y direction position of any loading point 18 can coincide with the X, Y direction position of the center of the M36 threaded hole on the positioning plate 14, that is, by moving the loading plate 1, any loading point 18 can coincide with the X, Y direction position of the center of the workbench.

[0066] To avoid interference from other structures when the fracture test auxiliary device is separated from the protective cover, such as Figures 4 to 6 As shown, the auxiliary device of the present invention further includes a first limit plate 16 and a second limit plate 17. The first limit plate 16 and the second limit plate 17 are arranged in parallel and are both arranged on the workbench. The first limit plate 16 and the second limit plate 17 are used together to limit the stroke of the workbench.

[0067] In order to realize the loading of multiple loading points 18 in one test, Figure 4 As shown, the fixing assembly of the present invention includes an adapter plate 13 and a connecting piece; one end of the adapter plate 13 is detachably connected to the positioning plate 14, and the other end is fixedly connected to the connecting piece; the connecting piece is also fixedly connected to the bottom surface of the first curved end 4 of the bending plate 3.

[0068] Specifically, the adapter plate 13 is a rectangular plate arranged in the horizontal direction, and the connecting parts are respectively connected to the adapter plate 13 and the bending plate 3. When designing the adapter plate 13, a plurality of groups of adapter threaded through holes 19 are arranged on the adapter plate 13, and the number of groups of the adapter threaded through holes 19 is the same as the number of the loading points 18 and the positions correspond, that is, each loading point 18 has a group of adapter threaded through holes 19 corresponding to its position, and each group of adapter threaded through holes 19 has a loading point 18 corresponding to its position, and the adapter plate 13 is fixedly connected to the positioning connection through holes on the positioning plate 14 through the adapter threaded through holes 19.

[0069] When the fracture test with multiple loading points 18 is performed, the following process is included:

[0070] First, the fracture test auxiliary device is installed, specifically including: positioning the loading point 18 during the test and determining the position of the loading plate 1: aligning the X and Y direction positions of the loading point 18 during the test with the X and Y direction positions of the center of the positioning threaded through hole 15 (i.e., the M36 threaded hole) on the positioning plate 14, that is, aligning the loading point 18 with the center of the workbench surface in the X and Y directions, and the position of the loading plate 1 is determined; then, the positions of the bending plate 3, the follower block 9, the connecting piece and the adapter plate 13 are determined and installed and fixed; since the positions of the loading point 18 and the fracture groove 6 of the bending plate 3 are relatively fixed, after the loading point 18 is positioned, the position of the loading plate 1 is determined, and since the loading point 18 is relatively fixed with the fracture groove 6 of the bending plate 3, the loading point 18 is positioned, and the position of the loading plate 1 is determined. The carrier plate 1 is fixedly connected to the bending plate 3, and the positions of the bending plate 3, the follower block 9, the connecting piece and the adapter plate 13 are all determined; then, the loading plate 1 is connected to the second curved end 5 of the bending plate 3, the follower block 9 is fixed above the first curved end 4 of the bending plate 3 (the follower block 9 is used to simulate the separation cover during the separation test), the first curved end 4 of the bending plate 3 is fixed by the connecting piece, and the connecting piece is fixedly connected to a group of adapter threaded through holes 19 corresponding to the loading point 18 on the adapter plate 13. At this time, the position of the adapter plate 13 is determined, and the adapter plate 13 is connected to the positioning plate 14. At the same time, the connecting piece is also supported by the workbench, and the bending test auxiliary device is installed. Secondly, according to the design requirements, a load force is applied to the bending plate 3 through the loading plate 1, the fracture mode of the bending plate 3 is studied, and the fracture test is completed; the loading point 18 required by the next test is switched; according to the switched loading point 18, the fracture test auxiliary device is reinstalled; specifically, when switching the loading point 18, the position of the switched loading point 18 is first found on the loading plate 1, and the switched loading point 18 is positioned and the position of the loading plate 1 is determined, and the X, Y direction position of the switched loading point 18 is coincident with the X, Y direction position of the center of the M36 threaded hole on the positioning plate 14, that is, the switched loading point 18 is aligned with the workbench. The center of the table top overlaps in the X and Y directions, and the position of the loading plate 1 is determined; the bending plate 3, the follower block 9, the connector and the adapter plate 13 are adjusted as a whole; after the position of the loading plate 1 is determined, since the relative positions of the bending plate 3, the follower block 9, the connector and the adapter plate 13 are fixed, at this time, it is only necessary to move the positions of the bending plate 3, the follower block 9, the connector and the adapter plate 13 as a whole. After the movement, the adapter plate 13 is fixedly connected with the positioning threaded through hole 15 on the positioning plate 14 by using the adapter threaded through hole 19 corresponding to the switched loading point 18, and the whole set of fracture test auxiliary device is installed. When switching the loading point 18 again, repeat the above process of switching the loading point 18 for the first time.

[0071] Compared with the prior art, the present invention sets multiple groups of transition threaded through holes 19 on the transition plate 13, each group of transition threaded through holes 19 corresponds to a different loading point 18, and can complete the fracture test of multiple loading points 18 at one time.

[0072] In order to stably support the bending plate 3, as Figures 4 to 6 As shown, the connecting piece of the present invention includes a first connecting plate 10 and a second connecting plate 11; the second connecting plate 11 is arranged on the workbench surface, the first connecting plate 10 is arranged on the top surface of the second connecting plate 11, and the top surface of the first connecting plate 10 is fixedly connected to the bottom surface of the first curved end 4 of the bending plate 3.

[0073] Specifically, the first connecting plate 10 of the present invention is connected to the bending plate 3 and the follower block 9 by bolts. Six M6 threaded holes are provided on the top surface of the first connecting plate 10 for bolt connection with the second bending through hole 8 designed at the first curved surface end 4 of the bending plate 3. The second bending through hole 8 includes six φ6.5mm countersunk holes. The hole spacing of the six M6 threaded holes on the top surface of the first connecting plate 10 is consistent with the hole spacing of the φ6.5mm countersunk holes on the bending plate 3. Four φ6.5 through holes are provided on the bottom surface of the first connecting plate 10 for bolt connection with the second connecting plate 11.

[0074] Compared with the prior art, the present invention can achieve stable support for the bending plate 3 by setting the first connecting plate 10 and the second connecting plate 11. In addition, when the first connecting plate 10 or the second connecting plate 11 is damaged, only one of the components needs to be replaced without replacing the entire connecting part, thus saving maintenance costs.

[0075] In order to achieve the connection between the second connecting plate 11 and the adapter plate 13 , a third connecting plate 12 is protruded from one side of the second connecting plate 11 and the adapter plate 13 of the present invention, and the third connecting plate 12 and the adapter plate 13 are detachably connected.

[0076] Specifically, the second connecting plate 11 is a vertically arranged rectangular plate with a size of 170mm×130mm×250mm. The top surface of the second connecting plate 11 is designed with 4 M6 threaded holes, and the hole spacing is consistent with the hole spacing of the 4 φ6.5 through holes on the bottom surface of the first connecting plate 10. The 4 M6 threaded holes are used to achieve threaded connection with the first connecting plate 10; the third connecting plate 12 is convexly arranged on the side adjacent to the second connecting plate 11 and the adapter plate 13. The third connecting plate 12 is integrally formed with the second connecting plate 11. The third connecting plate 12 is a rectangular flat plate, and the adapter plate 13 is provided with multiple The adapter plate 13 is fixedly connected to the third connecting plate 12 by inserting fixing bolts into the corresponding first connecting threaded through holes and the second connecting threaded through holes; for example, the third connecting plate 12 is provided with 4 φ6.5 through holes, and the adapter plate 13 is designed with 4 M6 through holes. The 4 φ6.5 through holes on the third connecting plate 12 correspond to the 4 M6 through holes on the adapter plate 13 in position and have the same hole spacing. The third connecting plate 12 and the adapter plate 13 are bolted together through the above-mentioned 4 φ6.5 and 4 M6 through holes.

[0077] It should be noted that the four φ6.5 through holes of the adapter plate 13 and the multiple groups of adapter threaded through holes 19 thereon have different functions and are arranged in different positions. The four M6 through holes on the adapter plate 13 are used for fixed connection with the third connecting plate 12; the multiple groups of adapter threaded through holes 19 on the adapter plate 13 are used for fixed connection with the positioning threaded through holes 15 on the positioning plate 14 when switching the loading point 18.

[0078] It should be noted that along the length direction of the positioning plate 14, a plurality of positioning and connecting threaded holes are provided at one end away from the positioning threaded through hole 15. For example, four positioning and connecting threaded holes are provided, and the four positioning and connecting through holes are M6 threaded holes. Each group of adapter threaded through holes 19 on the adapter plate 13 includes four φ6.5 through holes, and a group of adapter threaded through holes 19 on the adapter plate 13 includes four φ6.5 through holes that can be bolted to the four M6 through holes on the positioning plate 14.

[0079] In order to reduce the weight of the entire fracture test auxiliary device, the first connecting plate 10 of the present invention is an I-shaped connecting plate; the top surface of the first connecting plate 10 is connected to the bottom surface of the first curved end 4 of the bending plate 3, and the bottom surface of the first connecting plate 10 is connected to the top surface of the second connecting plate 11.

[0080] Specifically, the first connecting plate 10 of the present invention is an I-shaped connecting plate, which includes a top horizontal plate, a middle vertical plate and a bottom horizontal plate, wherein a plurality of first threaded holes are provided on the top horizontal plate of the first connecting plate 10, and correspondingly, a plurality of first through holes are provided on the first curved end 4 of the bending plate 3 and the follower block 9, wherein the number and positions of the first through holes on the bending plate 3 and the follower block 9 correspond to each other, and the positions and numbers of the first threaded holes and the first through holes also correspond to each other, and the first connecting plate 10, the bending plate 3 and the follower block 9 are fixed by bolt connection.

[0081] Compared with the prior art, the present invention can reduce the weight of the entire fracture test auxiliary device by setting the first connecting plate 10 into an I-shape; by setting a plurality of first threaded holes and first through holes, the first connecting plate 10, the bending plate 3 and the follower block 9 can be firmly fixed together, so that the first connecting plate 10 can be used to stably support the bending plate 3 to avoid shaking during the fracture test and affecting the test accuracy.

[0082] In order to further reduce the weight of the entire bending test auxiliary device, the second connecting plate 11 of the present invention has a hollow structure inside.

[0083] Taking into account that there are multiple loading points 18, due to the different positions of the loading points 18, the connection positions of the third connecting plate 12 and the adapter plate 13 are different, and the first connecting plate 10, the second connecting plate 11 and the third connecting plate 12 all need to avoid interference with the workbench. Therefore, a larger flat plate is required when designing the loading plate 1. The size of the loading plate 1 of the present invention is 225mm×200mm×20mm.

[0084] In summary, the present invention realizes the requirement of completing the breaking test of the bending plate 3 when the loading point 18 is not on the bending plate 3 body and the workbench stroke is limited by designing and processing a set of transfer auxiliary devices, and can also complete the breaking tests of multiple loading points 18 at one time.

[0085] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A bending plate fracture test method, characterized in that: The following steps are involved: The bending plate is an irregular long plate, and the loading point required by the design is not on the bending plate body. Along the length direction of the bending plate, the middle of the bending plate is a plane section, and the two ends are respectively a first curved surface end and a second curved surface end; a breaking groove is provided on the plane section of the bending plate; S1. Locate the loading point of the test and determine the position of the loading plate; Establish coordinates O (X, Y, Z) on the workbench surface, and the coordinates at the center of the workbench surface are (0, 0, 0); S2. Installing the fracture test auxiliary device, including determining the positions of the bending plate, the follower block, the first connecting plate, the second connecting plate, the third connecting plate and the adapter plate, and installing and fixing them; S3. Apply load to the bent plate through the loading plate according to the design requirements, study the fracture mode of the bent plate, and complete the fracture test.

2. The bending plate breaking test method according to claim 1, characterized in that: In the step S1, a positioning plate is arranged on the workbench surface, a positioning threaded through hole is arranged on the positioning plate, and the positioning plate is fixedly connected to the workbench via fixing bolts in the positioning threaded through hole.

3. The bending plate breaking test method according to claim 2, characterized in that: In the step S1, the X and Y direction positions of the center of the positioning threaded through hole on the positioning plate coincide with the X and Y direction positions of the center of the workbench.

4. The bending plate breaking test method according to claim 3, characterized in that: In the step S1, the loading plate is moved so that the loading point coincides with the positioning threaded through hole of the positioning plate in the X and Y directions. After the loading point is positioned, the position of the loading plate is determined.

5. The bending plate breaking test method according to claim 4, characterized in that: In the step S2, the positions of the bending plate, the conforming block, the first connecting plate, the second connecting plate, the third connecting plate and the adapter plate are determined according to the position of the loading plate.

6. The bending plate breaking test method according to claim 5, characterized in that: In the step S2, the loading plate is connected to the second curved surface end of the bending plate, and the conforming block is fixed to the first curved surface end of the bending plate.

7. The bending plate fracture test method according to claim 6, characterized in that: In the S2 step, the first curved end of the bending plate is fixed by a first connecting plate, and the first connecting plate is arranged on the top surface of the second connecting plate; a third connecting plate is protrudingly provided on one side of the second connecting plate adjacent to the adapter plate, and the third connecting plate is connected to the adapter plate.

8. The bending plate fracture test method according to claim 7, characterized in that: In the step S2, after the position of the adapter plate is determined, the adapter plate and the positioning plate are connected, and at the same time, the bottom surface of the second connecting plate is supported by the workbench, and the bending test auxiliary device is installed.

9. The bending plate breaking test method according to claim 8, characterized in that: Also includes S4; S4. Switch the loading point required by the next test and reinstall the fracture test auxiliary device according to the switched loading point.

10. A bending plate fracture test auxiliary device, characterized in that: A method for implementing a bending test of a bent plate as claimed in any one of claims 1 to 9; The fracture test auxiliary device comprises the positioning plate, a first connecting plate, a second connecting plate, a third connecting plate, a loading plate and a follower block.

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