Tension testing device and working method thereof
By employing a deformation pin design in the tensile testing device, the sliding component drives the deformation pin to generate progressive elastic deformation within the U-shaped frame, thus solving the problem of plastic deformation caused by stress concentration at the pin root and achieving reliable pin disassembly and testing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-23
- Publication Date
- 2026-04-03
Smart Images
Figure CN121783697A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of tensile testing technology, specifically relating to a device for straightening and applying pressure to a workpiece to be tested, and more particularly to a tensile testing device and its working method. Background Technology
[0002] In tensile testing equipment, the pin structure of the fixed clamp is generally designed as a solid cylinder with a uniform cross-section (such as a cylindrical or rectangular cylinder). When clamping a workpiece with high hardness, this type of pin is prone to localized plastic deformation in the contact area between the pin and the workpiece. Especially when the test load is close to or exceeds the yield strength of the pin material, irreversible radial expansion or bending deformation occurs at the root of the pin due to stress concentration, causing the clearance between the pin and the clamp to disappear, thus making it impossible to remove the pin with conventional disassembly force.
[0003] Therefore, how to reduce the bending deformation of the pin during tensile testing is a technical problem that urgently needs to be solved.
[0004] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore, the above description is not considered to constitute prior art information. Summary of the Invention
[0005] This disclosure provides at least one tensile testing device and its operating method.
[0006] In a first aspect, embodiments of this disclosure provide a tensile testing device, comprising: Test fixture; A fixing plate is disposed on one of the side walls of the test fixture; A pulling mechanism is provided on the side wall opposite to the fixed plate; A sliding member is disposed between the fixed plate and the pulling mechanism, and is slidably disposed on the test frame; Fixing clamps are provided on the opposing surfaces of the fixing plate and the sliding member; The fixing clamp includes: C-shaped frame; A deformable pin that passes through the top and bottom of the square frame; After the two ends of the workpiece under test are fixed to two fixed clamps, the sliding member is pulled along the test frame by the pulling mechanism to straighten the workpiece under test and apply tension, thereby causing the deformation pin to deform so that the deformation pin abuts against the top and bottom surfaces of the C-shaped frame, thereby dispersing the stress on the deformation pin to the top and bottom surfaces of the deformation pin.
[0007] In one optional implementation, the deformable pin includes: The pin body has a mounting groove on its side wall; A deformable component, which is disposed within the mounting groove; Two abutting slip rings abut against the upper and lower ends of the deformable part respectively, and are slidably disposed in the mounting groove of the pin body; When the deformable pin is inserted into the U-shaped frame, the deformable part faces away from the workpiece being tested. When the workpiece being tested is subjected to tensile testing, the deformable part deforms, pushing the two abutting slip rings to abut against the corresponding upper and lower top surfaces of the U-shaped frame.
[0008] In one optional embodiment, both the top and bottom surfaces of the mounting groove are inclined surfaces; The two abutment rings are respectively slidably disposed on the corresponding inclined surfaces.
[0009] In one optional embodiment, the distance between the outer wall of the abutting slip ring and the axis of the pin body is R1; The radius of the pin body is R2; Where R2≥R1.
[0010] In one optional embodiment, the distance between the outer wall of the deformable member and the axis of the pin body is R3; Where R3≤R1.
[0011] In one alternative embodiment, the deformable element includes: An arc-shaped buckle plate that fastens onto the mounting groove; The V-shaped abutment rod has its two ends abutting against the corresponding abutment slip rings, and the middle part of the V-shaped abutment rod abutting against the inner wall of the arc-shaped buckle plate; The arc-shaped buckle plate is an elastic plate; When the workpiece is subjected to tensile testing, the arc-shaped buckle plate is squeezed, which causes the two ends of the V-shaped support rod to push the corresponding support slip rings to move, thereby pushing the two support slip rings to support the upper and lower top surfaces corresponding to the C-shaped frame.
[0012] In one alternative embodiment, the V-shaped abutment bar includes: The first and second defensive phases; One end of the first abutting segment is rotatably connected to the corresponding end of the second abutting segment via a hinge shaft; Furthermore, a reset torsion spring is provided on the hinge shaft.
[0013] In one alternative embodiment, the pulling mechanism includes: A hydraulic cylinder, which is mounted on the test frame; A drive plate is connected to the sliding member via a connecting rod, and the drive plate is slidably mounted on the guide rail of the test fixture; The piston rod of the hydraulic cylinder is connected to the drive plate.
[0014] Secondly, this disclosure also provides a method for operating a tensile testing device as described above, the method comprising: One end of the workpiece to be tested is connected to one of the fixed clamps via a tensile testing instrument; Connect the other end of the workpiece to be measured to another fixed clamp; The sliding component is moved along the test frame by a pulling mechanism to straighten the workpiece under test and apply tension. When the workpiece being tested is straightened, it causes the deformation pin to deform so that the deformation pin abuts against the top and bottom surfaces of the C-shaped frame.
[0015] In one optional implementation, the deformable pin includes: The pin body has a mounting groove on its side wall; A deformable component, which is disposed within the mounting groove; Two abutting slip rings abut against the upper and lower ends of the deformable part respectively, and are slidably disposed in the mounting groove of the pin body; When the deformable pin is inserted into the U-shaped frame, the deformable part faces away from the workpiece being tested. When the workpiece being tested is subjected to tensile testing, the deformable part deforms, pushing the two abutting slip rings to abut against the corresponding upper and lower top surfaces of the U-shaped frame.
[0016] The beneficial effect of this invention is that the tensile testing device and its working method cause the deformation pin to undergo progressive elastic deformation within the C-shaped frame by the axial displacement of the sliding member along the test frame. This allows the stress originally concentrated at the root of the pin to be transferred along the inclined surface of the mounting groove to the upper and lower bottom surfaces of the C-shaped frame, thereby reducing the maximum stress at the root of the deformation pin and thus suppressing the occurrence of plastic deformation.
[0017] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.
[0018] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description
[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0020] Figure 1 This is a schematic diagram of the tensile testing device provided in the embodiments of this disclosure; Figure 2 A cross-sectional view of the tensile testing apparatus provided in an embodiment of this disclosure; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 A cross-sectional view of the fixing clamp provided in an embodiment of this disclosure; Figure 5 This is a schematic diagram of the structure of the deformable pin provided in an embodiment of this disclosure; Figure 6 A flowchart illustrating the operation of the tensile testing device provided in this embodiment of the present disclosure.
[0021] In the diagram: 100, test frame; 200, fixing plate; 300, pulling mechanism; 400, sliding component; 500, fixing clamp; 510, C-shaped frame; 520, deformable pin; 521, pin body; 522, deformable component; 5221, arc-shaped buckle plate; 5222, V-shaped abutment rod; 5222a, first abutment section; 5222b, second abutment section; 5222c, hinge shaft; 523, abutment slip ring; 524, mounting groove. Detailed Implementation
[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0023] In this document, when it is mentioned that a first component is located on a second component, this can mean that the first component can be directly formed on the second component, or that a third component can be inserted between the first and second components. Furthermore, in the accompanying drawings, the thickness of the components may be exaggerated or reduced for the purpose of effectively describing the technical content.
[0024] In this document, when an element or layer is referred to as “located,” “joined to,” “connected to,” “attached to,” or “coupled to” another element or layer, it may be directly located, joined, connected, attached to, or coupled to the other element or layer, or there may be intermediate elements or layers present. Conversely, when an element is referred to as “directly on another element or layer,” “directly joined to,” “directly connected to,” “directly attached to,” or “directly coupled to” another element or layer, there may be no intermediate elements or layers present. Other terms used to describe relationships between elements should be interpreted in a similar manner (e.g., “between” versus “directly between,” “adjacent” versus “directly adjacent,” etc.). As used herein, the term “and / or” includes any and all combinations of one or more of the related listed items.
[0025] In this document, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as “at least one of…” modify the entire list of elements when following a list of elements, rather than individual elements in the list. For example, the expression “at least one of a, b, and c” should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.
[0026] The terminology used herein is for the purpose of describing specific exemplary configurations only and is not intended to be limiting. As used herein, the singular articles “a,” “an,” and “the” may also be intended to include plural forms unless otherwise expressly stated herein. The terms “comprising,” “including,” and “having” are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as requiring them to be performed in the specific order discussed or shown, unless specifically identified as such. Additional or alternative steps may be employed.
[0027] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.
[0028] Research has revealed that in tensile testing devices, the pin structure of the fixed clamp commonly employs a solid cylindrical design with a uniform cross-section (such as a cylindrical or rectangular column). When clamping a high-hardness workpiece, this type of pin is prone to localized plastic deformation in the contact area between the pin and the workpiece. Especially when the test load approaches or exceeds the yield strength of the pin material, irreversible radial expansion or bending deformation occurs at the root of the pin due to stress concentration. This leads to the disappearance of the clearance between the pin and the clamp, making it impossible to remove the pin using conventional disassembly forces.
[0029] Based on the above research, this disclosure provides a tensile testing device and its working method. By displacing the slider 400 along the axial direction of the test frame 100, the deformation pin 520 is driven to undergo progressive elastic deformation within the U-shaped frame 510. This causes the stress originally concentrated at the root of the pin to be transferred along the inclined surface of the mounting groove 524 to the upper and lower bottom surfaces of the U-shaped frame 510, thereby reducing the maximum stress at the root of the deformation pin 520 and suppressing the occurrence of plastic deformation.
[0030] The shortcomings of the above solutions are the result of the inventor's practical experience and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure should be considered as the inventor's contribution to this disclosure.
[0031] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0032] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.
[0033] Please see Figure 1 and Figure 2At least one embodiment provides a tensile testing device, comprising: a test frame 100; a fixed plate 200 disposed on one side wall of the test frame 100; a pulling mechanism 300 disposed on the side wall opposite to the fixed plate 200; and a sliding member 400 disposed between the fixed plate 200 and the pulling mechanism 300, and slidably disposed on the test frame 100; wherein, a fixing clamp 500 is provided on the opposing surfaces of the fixed plate 200 and the sliding member 400; wherein the fixing clamp 500 The test frame 100 includes: a rectangular frame 510; a deformable pin 520 that passes through the top and bottom of the rectangular frame; after the two ends of the workpiece to be tested are fixed to two fixed clamps 500, the sliding member 400 is pulled along the test frame 100 by the pulling mechanism 300 to straighten the workpiece to be tested and apply tension, thereby causing the deformable pin 520 to deform so that the deformable pin 520 abuts against the upper and lower surfaces of the rectangular frame 510, thereby dispersing the stress on the deformable pin 520 to the top and bottom surfaces of the deformable pin 520.
[0034] By displacing the slider 400 along the axial direction of the test frame 100, the deformable pin 520 is driven to undergo progressive elastic deformation within the U-shaped frame 510. This causes the stress originally concentrated at the root of the pin to be transferred along the inclined surface of the mounting groove 524 to the upper and lower bottom surfaces of the U-shaped frame 510, thereby reducing the maximum stress at the root of the deformable pin 520 and suppressing the occurrence of plastic deformation.
[0035] Please see Figure 2 and Figure 3 The deformable pin 520 includes: a pin body 521, with a mounting groove 524 on its side wall; a deformable element 522 disposed in the mounting groove 524; and two abutting slip rings 523, which abut against the upper and lower ends of the deformable element 522 respectively, and are slidably disposed in the mounting groove 524 of the pin body 521. When the deformable pin 520 is inserted into the C-shaped frame 510, the deformable element 522 faces away from the workpiece being tested, and when the workpiece being tested is subjected to a tensile test, the deformable element 522 deforms, pushing the two abutting slip rings 523 to abut against the corresponding upper and lower top surfaces of the C-shaped frame 510.
[0036] The elastic deformation of the deformable element 522 pushes the sliding ring 523 to resist the inverted frame 510, forming a secondary stress dispersion, reducing local stress, and effectively preventing plastic deformation at the root of the pin.
[0037] Please see Figure 3 and Figure 4 The top and bottom surfaces of the mounting groove 524 are both inclined surfaces; the two supporting sliding rings 523 are respectively slidably disposed on the corresponding inclined surfaces.
[0038] By using an inclined surface on the mounting groove 524, the retaining slip ring 523 moves gradually along the inclined surface when subjected to force, forming a gradient stress transmission and improving the synchronicity of the slip ring movement.
[0039] Please see Figure 3 and Figure 5 The distance between the outer wall of the abutting slip ring 523 and the axis of the pin body 521 is R1; the radius of the pin body 521 is R2; wherein, R2≥R1. By limiting the dimensions of R1 and R2, interference is avoided when the deformable pin 520 is inserted into the U-shaped frame 510.
[0040] Please see Figure 4 and Figure 5 The distance between the outer wall of the deformable element 522 and the axis of the pin body 521 is R3; where R3 ≤ R1. By limiting the dimensions of R3 and R1, it is ensured that the workpiece under test abuts against the outer wall of the deformable element 522 when connected to the deformable pin 520.
[0041] Specifically, the deformable component 522 includes: an arc-shaped buckle plate 5221, which fastens onto the mounting groove 524; and a V-shaped abutment rod 5222, whose two ends abut against corresponding abutment slip rings 523, with the middle portion of the V-shaped abutment rod 5222 abutting against the inner wall of the arc-shaped buckle plate 5221. The arc-shaped buckle plate 5221 is an elastic plate. During a tensile test on the workpiece, the arc-shaped buckle plate 5221 is compressed, thereby causing the two ends of the V-shaped abutment rod 5222 to push the corresponding abutment slip rings 523 to move, thus pushing the two abutment slip rings 523 to abut against the corresponding upper and lower surfaces of the U-shaped frame 510. The arc-shaped buckle plate 5221 deforms under pressure, thereby causing the V-shaped rod to distribute stress to the abutment slip rings 523 on both sides.
[0042] It should be noted that the V-shaped abutment rod 5222 includes: a first abutment section 5222a and a second abutment section 5222b; one end of the first abutment section 5222a is rotatably connected to the corresponding end of the second abutment section 5222b via a hinge shaft 5222c; and a return torsion spring is provided on the hinge shaft 5222c. The return spring enables the V-shaped abutment rod 5222 to have an automatic return function, which resets the deformed pin 520 after the test is completed.
[0043] Please continue reading. Figure 1 and Figure 2 The pulling mechanism 300 includes: a hydraulic cylinder, which is mounted on the test frame 100; a drive plate, which is connected to the sliding member 400 via a connecting rod, and the drive plate is slidably mounted on the guide rail of the test frame 100; the piston rod of the hydraulic cylinder is connected to the drive plate.
[0044] Please see Figure 6 At least one embodiment provides a method of operation using the tensile testing device as described above, the method comprising: S110: One end of the workpiece to be tested is connected to one of the fixed clamps 500 via a tensile testing instrument; S120: Connect the other end of the workpiece to be measured to another fixed chuck 500; S130: The sliding member 400 is moved along the test frame 100 by the pulling mechanism 300 to straighten the workpiece to be tested and apply a pulling force; S140: When the workpiece being tested is straightened, the deformation pin 520 is deformed so that the deformation pin 520 abuts against the upper and lower surfaces of the C-shaped frame 510.
[0045] The deformable pin 520 includes: a pin body 521 with a mounting groove 524 on its side wall; a deformable element 522 disposed in the mounting groove 524; and two abutting slip rings 523 abutting against the upper and lower ends of the deformable element 522 respectively, and slidably disposed in the mounting groove 524 of the pin body 521. When the deformable pin 520 is inserted into the C-shaped frame 510, the deformable element 522 faces away from the workpiece being tested, and when a tensile test is performed on the workpiece being tested, the deformable element 522 deforms, pushing the two abutting slip rings 523 to abut against the corresponding upper and lower top surfaces of the C-shaped frame 510.
[0046] In summary, the present invention provides a tensile testing device and its operating method. The tensile testing device includes: a testing frame 100; a fixed plate 200 disposed on one side wall of the testing frame 100; a pulling mechanism 300 disposed on the side wall opposite to the fixed plate 200; and a sliding member 400 disposed between the fixed plate 200 and the pulling mechanism 300, and slidably disposed on the testing frame 100. A fixing clamp 500 is provided on the opposing surfaces of the fixed plate 200 and the sliding member 400. The fixed clamp 500 includes: a square frame 510; a deformable pin 520 that passes through the top and bottom of the square frame; after the two ends of the workpiece to be tested are fixed to the two fixed clamps 500, the sliding member 400 is pulled along the test frame 100 by the pulling mechanism 300 to straighten the workpiece to be tested and apply tension, thereby causing the deformable pin 520 to deform so that the deformable pin 520 abuts against the upper and lower surfaces of the square frame 510, thereby dispersing the stress on the deformable pin 520 to the top and bottom surfaces of the deformable pin 520. By displacing the slider 400 along the axial direction of the test frame 100, the deformable pin 520 is driven to undergo progressive elastic deformation within the U-shaped frame 510. This causes the stress originally concentrated at the root of the pin to be transferred along the inclined surface of the mounting groove 524 to the upper and lower bottom surfaces of the U-shaped frame 510, thereby reducing the maximum stress at the root of the deformable pin 520 and suppressing the occurrence of plastic deformation.
[0047] In the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.
[0048] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as a second element, component, region, layer, or segment.
[0049] Spatially relative terms, such as “inside,” “outside,” “below,” “below,” “down,” “above,” “up,” etc., may be used herein to describe the relationship between one element or feature illustrated in the figures and another element or feature. In addition to the orientations depicted in the figures, spatially relative terms may be intended to cover different orientations of the device in use or operation. For example, if the device in the figure is flipped, an element described as “below” or “below” other elements or features would be oriented as “above” other elements or features. Thus, the example term “below” can cover both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.
[0050] In the above discussion, unless otherwise stated, when used to describe numerical values, the terms “about,” “approximately,” “basically,” etc., indicate a change of + / - 10% in that value.
[0051] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.
Claims
1. A tensile testing device, characterized in that, include: Test fixture (100); A fixing plate (200) is disposed on one of the side walls of the test fixture (100); A pulling mechanism (300) is provided on the side wall opposite to the fixed plate (200); A sliding member (400) is disposed between the fixed plate (200) and the pulling mechanism (300) and is slidably disposed on the test frame (100); Fixing clamps (500) are provided on the opposing surfaces of the fixing plate (200) and the sliding member (400). The fixed clamp (500) includes: C-shaped frame (510); A deformable pin (520) extends through the top and bottom of the square frame; After the two ends of the workpiece under test are fixed to two fixed clamps (500), the sliding member (400) is pulled along the test frame (100) by the pulling mechanism (300) to straighten the workpiece under test and apply tension, thereby causing the deformation pin (520) to deform so that the deformation pin (520) abuts against the top and bottom surfaces of the C-shaped frame (510), thereby dispersing the stress on the deformation pin (520) to the top and bottom surfaces of the deformation pin (520).
2. The tensile testing device as described in claim 1, characterized in that, The deformable pin (520) includes: The pin body (521) has a mounting groove (524) on its side wall. Deformable element (522) is disposed within the mounting groove (524); Two abutting slip rings (523) abut against the upper and lower ends of the deformable member (522) respectively, and are slidably disposed in the mounting groove (524) of the pin body (521); When the deformable pin (520) is inserted into the shaped frame (510), the deformable element (522) faces away from the workpiece being tested, and when the workpiece being tested is subjected to a tensile test, the deformable element (522) deforms, pushing the two abutting slip rings (523) to abut against the corresponding upper and lower top surfaces of the shaped frame (510).
3. The tensile testing device as described in claim 2, characterized in that, The top and bottom surfaces of the mounting groove (524) are both inclined surfaces; The two abutment rings (523) are respectively slidably disposed on the corresponding inclined surfaces.
4. The tensile testing device as described in claim 2, characterized in that, The distance between the outer wall of the abutting slip ring (523) and the axis of the pin body (521) is R1; The radius of the pin body (521) is R2; Where R2≥R1.
5. The tensile testing device as described in claim 4, characterized in that, The distance between the outer wall of the deformable part (522) and the axis of the pin body (521) is R3; Where R3≤R1.
6. The tensile testing device as described in claim 2, characterized in that, The deformable element (522) includes: An arc-shaped buckle plate (5221) is fastened to the mounting groove (524); The V-shaped abutment rod (5222) has its two ends abutting against the corresponding abutment slip ring (523), and the middle part of the V-shaped abutment rod (5222) abutting against the inner wall of the arc-shaped buckle plate (5221); The arc-shaped buckle plate (5221) is an elastic plate; When the workpiece is subjected to tensile testing, the arc-shaped buckle plate (5221) is squeezed, thereby driving the two ends of the V-shaped support rod (5222) to push the corresponding support slip ring (523) to move, and then push the two support slip rings (523) to support the corresponding upper and lower top surfaces of the C-shaped frame (510).
7. The tensile testing device as described in claim 6, characterized in that, The V-shaped abutment rod (5222) includes: First defensive section (5222a) and second defensive section (5222b); One end of the first abutting segment (5222a) is rotatably connected to the corresponding end of the second abutting segment (5222b) via a hinge shaft (5222c); Furthermore, a reset torsion spring is provided on the hinge shaft (5222c).
8. The tensile testing device as described in claim 1, characterized in that, The pulling mechanism (300) includes: A hydraulic cylinder, which is mounted on the test fixture (100); A drive plate is connected to the slider (400) via a connecting rod, and the drive plate is slidably mounted on the guide rail of the test frame (100); The piston rod of the hydraulic cylinder is connected to the drive plate.
9. A method for operating the tensile testing device as described in claim 1, characterized in that, The working method includes: One end of the workpiece to be tested is connected to one of the fixed clamps (500) through a tensile testing instrument; The other end of the workpiece to be measured is connected to another fixed chuck (500); The sliding member (400) is moved along the test frame (100) by the pulling mechanism (300) to straighten the workpiece to be tested and apply tension; When the workpiece being tested is straightened, it causes the deformation pin (520) to deform so that the deformation pin (520) abuts against the upper and lower surfaces of the shaped frame (510).
10. The working method as described in claim 9, characterized in that, The deformable pin (520) includes: The pin body (521) has a mounting groove (524) on its side wall. Deformable element (522) is disposed within the mounting groove (524); Two abutting slip rings (523) abut against the upper and lower ends of the deformable member (522) respectively, and are slidably disposed in the mounting groove (524) of the pin body (521); When the deformable pin (520) is inserted into the shaped frame (510), the deformable element (522) faces away from the workpiece being tested, and when the workpiece being tested is subjected to a tensile test, the deformable element (522) deforms, pushing the two abutting slip rings (523) to abut against the corresponding upper and lower top surfaces of the shaped frame (510).