Stretching tool and testing equipment

Abstract

The embodiment of the utility model provides a stretching tool and test equipment, the stretching tool is configured to be used for stretching a to-be-stretched part, a first clamping assembly comprises a first connecting structure and a first fastening structure, the first fastening structure is connected with the first connecting structure, a first fastening station is formed between the first connecting structure and the first fastening structure, and a second fastening station is formed between the first connecting structure and the first fastening structure. The first fastening station is configured to be used for fastening the fixed surface; the second clamping assembly comprises a second connecting structure, a second fastening structure and a third fastening structure, the second fastening structure and the third fastening structure are connected with the second connecting structure, a second fastening station is formed between the second fastening structure and the second connecting structure, and a third fastening station is formed between the third fastening structure and the second connecting structure. The second fastening station is configured to be used for fastening the first extending face, and the third fastening station is configured to be used for fastening the second extending face. The welding reliability can be really checked, and the application safety of the to-be-stretched part is improved.

Description

Technical Field

[0001] The present application relates to the field of testing technology, and in particular to a stretching tool and testing equipment. Background Art

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in their development.

[0003] In related technologies, in order to ensure the quality of laser welding, standard test pieces are generally used for testing. This method can assess the welding strength of the plate itself, but the actual welding strength cannot be tested. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a stretching tool and testing equipment that can truly assess the reliability of welding and improve the safety of the application of the parts to be stretched.

[0005] In a first aspect, an embodiment of the present application provides a stretching tool, which is configured to stretch a workpiece to be stretched, wherein the workpiece to be stretched is provided with a fixed surface distributed along a first direction and a first extension surface and a second extension surface distributed along a second direction, the first extension surface and the second extension surface are adjacent to or relatively distributed on the fixed surface, and the stretching tool comprises: a first clamping assembly, comprising a first connecting structure and a first fastening structure, the first fastening structure connecting the first connecting structure to form a first fastening station between the first connecting structure and the first fastening structure, the first fastening station being configured to fasten the fixed surface; a second clamping assembly, comprising a second connecting structure, a second fastening structure and a third fastening structure, the second fastening structure and the third fastening structure respectively connecting the second connecting structure to form a second fastening station between the second fastening structure and the second connecting structure and a third fastening station between the third fastening structure and the second connecting structure, the second fastening station being configured to fasten the first extension surface, and the third fastening station being configured to fasten the second extension surface.

[0006] In the above-mentioned implementation process, the workpiece to be stretched is provided with a fixed surface, a first extension surface and a second extension surface, the first extension surface and the second extension surface are respectively connected to the fixed surface, the first fastening structure is connected to the first connecting structure, and can be used to fasten the fixed surface of the workpiece to be stretched, the second fastening structure and the third fastening structure are respectively connected to the second connecting structure, so as to fasten the first extension surface and the second extension surface of the workpiece to be stretched, so that when an external force is applied to the first clamping component and / or the second clamping component, a tensile test between the first extension surface and the fixed surface and between the second extension surface and the fixed surface can be realized, so as to truly assess the reliability of welding and improve the safety of application of the workpiece to be stretched.

[0007] In some embodiments, one end of the second fastening structure is hinged to the second connecting structure, and the other end forms a first fastening end, and the first fastening end is configured to fasten the first extension surface, and / or one end of the third fastening structure is hinged to the second connecting structure, and the other end forms a second fastening end, and the second fastening end is configured to fasten the second extension surface.

[0008] In the above-mentioned implementation process, the second fastening structure and / or the third fastening structure are hinged to the second connecting structure, so that when the second fastening structure and the third fastening structure are connected to the second connecting structure, after external force is applied to the second fastening structure and the third fastening structure, the second fastening structure and the third fastening structure can be rotated relative to the second connecting structure respectively, thereby achieving clamping of the first extension surface and the second extension surface, which is beneficial to the testing of the parts to be stretched and improves the safety of the application of the parts to be stretched.

[0009] In some embodiments, the second connection structure includes a second connection member and a second connection head, the second connection head is connected to the second connection member, and the second connection head is located on a side of the second connection member away from the first clamping assembly.

[0010] In the above-mentioned implementation process, the second connecting head is connected to the second connecting member, and the second connecting member is provided with a second fastening structure and a third fastening structure. After applying external force to the second fastening structure and the third fastening structure, the first extension surface and the second extension surface can be clamped, and then an external force is applied to the second connecting head to stretch the first extension surface and the second extension surface, which is beneficial to the testing of the parts to be stretched and improves the safety of the application of the parts to be stretched.

[0011] In some embodiments, the second connecting member is configured as a first limiting groove and a second limiting groove, the first limiting groove is configured to accommodate a portion of the second fastening structure, and the second limiting groove is configured to accommodate a portion of the third fastening structure.

[0012] In the above-mentioned implementation process, the second connecting structure is adapted to the first limiting groove, and the third connecting structure is adapted to the second limiting groove, so that when an external force is applied to the second connecting structure, the second connecting structure can rotate relative to the first limiting groove, thereby achieving the fastening of the first extension surface, and when an external force is applied to the third structure, the third connecting structure can rotate relative to the second limiting groove, thereby achieving the fastening of the second extension surface. The entire structure is easy to fasten, and can achieve the fastening of the surfaces of the parts to be stretched on different sides, effectively verifying the actual connection weaknesses between different surfaces of the parts to be stretched, quickly carrying out welding process verification, and shortening the product development verification cycle.

[0013] In some embodiments, the second fastening structure includes a first fastening frame and a first adjusting member, one end of the first fastening frame is configured in the first limiting groove, and one end of the first adjusting member is passed through the first fastening frame and connected to the second connecting member, so that when the first adjusting member is adjusted, one end of the first fastening frame rotates around the first limiting groove, and the other end thereof abuts against the first extension surface.

[0014] In the above implementation process, one end of the first adjusting member is passed through the first fastening frame and is connected to the second connecting member, so that when the first adjusting member is adjusted, one end of the first fastening frame can be driven to rotate around the first limiting groove, and then the first extension surface is pressed at the other end to achieve the fastening of the first extension surface, which is conducive to verifying the welding reliability between the first extension surface and the fixed surface.

[0015] In some embodiments, the first adjusting member includes a first adjusting rod and a first limiting head, the first fastening frame is provided with a first connecting hole, one end of the first adjusting rod is connected to the first limiting head, and the other end thereof is passed through the first connecting hole and connected to the second connecting member, wherein the outer diameter of the first adjusting rod is smaller than the aperture of the first connecting hole.

[0016] In the above implementation process, the outer diameter of the first adjusting rod is smaller than the aperture of the first connecting hole. When the first adjusting rod is passed through the first connecting hole and connected to the second connecting member, the first fastening frame can be rotated around the first limiting groove when the first adjusting rod is adjusted, thereby achieving the fastening of the first extension surface, which is beneficial to verifying the welding reliability between the first extension surface and the fixed surface.

[0017] In some embodiments, the second fastening structure further includes a first fastening block, one end of which is detachably connected to the first fastening frame, and the other end of which is configured to abut against the first extension surface.

[0018] In some embodiments, the third fastening structure includes a second fastening frame and a second adjusting member, one end of the second fastening frame is configured in the second limiting groove, and one end of the second adjusting member is passed through the second fastening frame and connected to the second connecting member, so that when the second adjusting member is adjusted, one end of the second fastening frame rotates around the second limiting groove, and the other end thereof abuts against the second extension surface.

[0019] In the above implementation process, one end of the second adjusting member is passed through the second fastening frame and is connected to the second connecting member, so that when the second adjusting member is adjusted, one end of the second fastening frame can be driven to rotate around the second limiting groove, and then the second extension surface is pressed at the other end to achieve the fastening of the second extension surface, which is conducive to verifying the welding reliability between the second extension surface and the fixed surface.

[0020] In some embodiments, the second adjusting member includes a second adjusting rod and a second limit head, the second fastening frame is provided with a second connecting hole, one end of the second adjusting rod is connected to the second limit head, and the other end thereof is passed through the second connecting hole and connected to the second connecting member, wherein the outer diameter of the second adjusting rod is smaller than the aperture of the second connecting hole.

[0021] In the above implementation process, the outer diameter of the second adjusting rod is smaller than the aperture of the second connecting hole. When the second adjusting rod is passed through the second connecting hole and connected to the second connecting member, the second fastening frame can be rotated around the second limiting groove when the second adjusting rod is adjusted, thereby achieving the fastening of the second extension surface, which is conducive to verifying the welding reliability between the second extension surface and the fixed surface.

[0022] In some embodiments, the third fastening structure further includes a second fastening block, one end of which is detachably connected to the second fastening frame, and the other end of which is configured to abut against the second extension surface.

[0023] In some embodiments, the first connection structure includes a first connection member and a first connection head, the first connection head is connected to the first connection member, and the first connection head is located on a side of the first connection member away from the first fastening structure.

[0024] In the above-mentioned implementation process, the first connecting head is connected to the first connecting member, and the first connecting member is provided with a first fastening structure. After applying an external force to the first fastening structure, the fixed surface can be clamped, and then an external force is applied to the first connecting head to stretch the fixed surface, which is beneficial to the testing of the parts to be stretched and improves the safety of the application of the parts to be stretched.

[0025] In some embodiments, the first fastening structure includes a mounting seat and a fastening block, the mounting seat is connected to the first connecting member, and the fastening block is connected to a side of the mounting seat away from the first connecting member for fastening the fixing surface.

[0026] In some embodiments, the first connecting member is provided with a first receiving groove, and the first receiving groove is configured to receive a part of the structure of the mounting seat, and can be used to adjust the position of the mounting seat relative to the first connecting member, so as to facilitate the testing of the tensile member.

[0027] In some embodiments, the mounting seat is provided with a second accommodating groove along the first direction, and the second accommodating groove is configured to accommodate a part of the structure of the fixing surface, and can be used to adjust the position of the to-be-stretched piece relative to the mounting seat, so as to facilitate the testing of the to-be-stretched piece.

[0028] In a second aspect, the present application also provides a testing device, comprising a stretching tool as described in any one of the above items.

[0029] Other features and advantages of the present disclosure will be set forth in the following description, or some features and advantages may be inferred or unambiguously determined from the description, or may be learned by implementing the above-mentioned technology of the present disclosure.

[0030] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 A schematic diagram of the structure of the stretching tooling provided in the embodiment of the present application;

[0033] Figure 2 A schematic structural diagram of a first clamping assembly of a stretching tool provided in an embodiment of the present application;

[0034] Figure 3 A schematic structural diagram of the second clamping assembly of the stretching tool provided in an embodiment of the present application.

[0035] Reference numerals

[0036] 100, first clamping assembly; 101, first connecting structure; 1011, first connector; 1012, first connecting member; 1013, first receiving groove; 1014, scale line; 102, first fastening structure; 1021, mounting seat; 1022, fastening block; 1023, second receiving groove; 1024, mounting groove; 200, second clamping assembly; 201, second connecting structure; 2011, second connecting member; 2012, first Two connecting heads; 2013, first limiting groove; 2014, second limiting groove; 202, second fastening structure; 2021, first fastening frame; 2022, first adjusting member; 2023, first fastening block; 203, third fastening structure; 2031, second fastening frame; 2032, second adjusting member; 2033, second fastening block; 300, member to be stretched; 301, fixing surface; 302, first extension surface; 303, second extension surface. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0038] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0039] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0040] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or a point connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0042] Example

[0043] In this application, the parts to be stretched include but are not limited to the battery cell shell; in order to adapt to the continuous improvement of the battery cell energy density, the thickness of the battery cell shell in mainstream applications has been reduced from the original 1.0mm to 0.5mm, and is still developing in a thinner direction (0.35mm, 0.3mm), collectively referred to as thin-walled batteries. In addition to improving the energy density of the battery cell, thin-walled batteries can also bring a simpler layout and better thermal management effect. This is because the tabs of thin-walled batteries are located on the side, which can be compatible with two layers of water cooling systems on the upper and lower sides. Based on the above three factors, thin-walled batteries are the future development trend of the industry and are gradually being adopted by mainstream new energy vehicles at home and abroad.

[0044] The three advantages of thin-walled long aluminum shell battery cells are as follows: ① High platformization and high space utilization: The battery cell height is 80mm-110mm, which can effectively be compatible with the space height requirements of vehicles on different platforms (A / B / C), and is easy to adapt to the different requirements of battery pack layout and vehicle ground clearance indicators. The space volume utilization rate is as high as 80%, and it is easier to achieve a higher energy-to-weight ratio; ② High production efficiency and low cost: The traditional pole ear connection method is that the battery cell pole ears are pre-welded together by ultrasound, and after pre-welding, the battery cell pole ears are ultrasonically welded to the connecting piece, and the connecting piece is then laser welded to the pole of the battery cell top cover. This connection method requires 2 ultrasonic welding processes and 1 laser welding process, and the second ultrasonic welding power is large and the cost is high. At the same time, an additional connecting piece is required, which not only complicates the process but also increases the production cost. The thin-walled long aluminum shell battery cell adopts the connection technology of the tab without connecting piece to improve the production efficiency and reduce the production cost; ③ The battery cell is arranged vertically, and the double-sided contact thermal management efficiency is high: the harmonica tube liquid cooling plate can be arranged on both sides of the large surface of the battery cell, or on the top and bottom of the battery cell, which can realize the double-sided cooling of the battery cell, increase the contact area of ​​the liquid cooling plate, and enhance the heat exchange capacity of the battery cell. When encountering superimposed working conditions such as high-speed climbing and high-power fast charging, the temperature difference is 3-5℃, which greatly improves the competitiveness of the product.

[0045] However, the inventor discovered during the design process that the top cover and shell of the thin-walled long aluminum shell battery cell are welded by laser butt welding. In order to assess the quality of laser welding, standard test pieces are generally used for testing. The national standard is GB / T 228.1-2021 "Metallic Material Tensile Test Part 1 Room Temperature Test Method". This method can assess the welding strength of the sheet itself, but the entity's welding strength cannot be tested, especially the welding strength of the top cover bend and the aluminum shell. In fact, to ensure assemblability and the characteristics of machining, there will be a certain angle and gap between the top cover bend and the aluminum shell. The laser energy will change in defocus during the welding process. If there are deficiencies and other abnormalities, the welding quality cannot be guaranteed, especially the gap space at the bend is filled, resulting in welding quality defects. Because of angle reasons and cutting damage, traditional metallographic techniques cannot accurately detect its performance such as penetration depth.

[0046] In view of this, in a first aspect, an embodiment of the present application provides a stretching tool, wherein the stretching tool is configured to stretch a workpiece 300 to be stretched, wherein the workpiece 300 to be stretched is configured with a fixed surface 301 distributed along a first direction and a first extension surface 302 and a second extension surface 303 distributed along a second direction, wherein the first extension surface 302 and the second extension surface 303 are adjacent to or relatively distributed on the fixed surface 301, and the stretching tool comprises: a first clamping assembly 100, comprising a first connecting structure 101 and a first fastening structure 102, wherein the first fastening structure 102 is connected to the first connecting structure 101 to form a A first fastening station, the first fastening station is configured to fasten the fixed surface 301; a second clamping assembly 200, comprising a second connecting structure 201, a second fastening structure 202 and a third fastening structure 203, the second fastening structure 202 and the third fastening structure 203 are respectively connected to the second connecting structure 201 to form a second fastening station between the second fastening structure 202 and the second connecting structure 201 and a third fastening station between the third fastening structure 203 and the second connecting structure 201, the second fastening station is configured to fasten the first extension surface 302, and the third fastening station is configured to fasten the second extension surface 303.

[0047] Exemplarily, the part to be stretched 300 includes but is not limited to a battery cell, the fixed surface 301 includes but is not limited to a battery cell top cover, the first extension surface 302 (e.g., a large surface of a battery cell) and the second extension surface 303 (e.g., a small surface of a battery cell) include but are not limited to a battery cell shell, for example, the first extension surface 302 is adjacent to the second extension surface 303, wherein the first direction includes but is not limited to a left-right direction, and the second direction includes but is not limited to an up-and-down direction, so that after applying external force to the first clamping assembly 100 and / or the second clamping assembly 200, it can be used to test the position of laser welding of the part to be stretched 300, effectively verify the actual welding weaknesses of the battery cell top cover, quickly carry out DOE verification of the welding process, shorten the product development verification cycle, and enable the battery cell to smoothly pass the battery cell vibration test, the whole package vibration test, and the whole vehicle drive endurance test, thereby truly improving the reliability of the product, reducing the risk of vibration failure to zero, and completely avoiding the safety hazard caused by leakage of the shell after dynamic vibration of the battery cell after packaging.

[0048] In the above-mentioned implementation process, the workpiece 300 to be stretched is provided with a fixed surface 301, a first extension surface 302 and a second extension surface 303, the first extension surface 302 and the second extension surface 303 are respectively connected to the fixed surface 301, the first fastening structure 102 is connected to the first connection structure 101, and can be used to fasten the fixed surface 301 of the workpiece 300 to be stretched, the second fastening structure 202 and the third fastening structure 203 are respectively connected to the second connection structure 201, so as to fasten the first extension surface 302 and the second extension surface 303 of the workpiece 300 to be stretched, so that when an external force is applied to the first clamping component 100 and / or the second clamping component 200, a tensile test between the first extension surface 302 and the fixed surface 301 and between the second extension surface 303 and the fixed surface 301 can be realized, so as to truly assess the reliability of welding and improve the safety of the application of the workpiece 300 to be stretched.

[0049] In some embodiments, one end of the second fastening structure 202 is hinged to the second connecting structure 201, and the other end forms a first fastening end, and the first fastening end is configured to fasten the first extension surface 302, and / or one end of the third fastening structure 203 is hinged to the second connecting structure 201, and the other end forms a second fastening end, and the second fastening end is configured to fasten the second extension surface 303.

[0050] Exemplarily, when the second fastening structure 202 is hinged to the second connecting structure 201, the second fastening structure 202 can rotate relative to the second connecting structure 201, and when the third fastening structure 203 is hinged to the second connecting structure 201, the third fastening structure 203 can rotate relative to the second connecting structure 201, wherein the hinge mode of the second fastening structure 202 and the second connecting structure 201 and the hinge mode of the third fastening structure 203 and the second connecting structure 201 may be consistent or inconsistent, and it is only necessary to fasten the first extension surface 302 and the second extension surface 303 respectively.

[0051] It should be noted that in order to ensure that there will be no problems such as slippage during the tensile test, the positions where the first fastening end and the second fastening end contact the part to be stretched 300 are both serrated or other shaped to increase the friction of press-fitting and clamping.

[0052] In the above-mentioned implementation process, the second fastening structure 202 and / or the third fastening structure 203 are hinged to the second connecting structure 201, so that when the second fastening structure 202 and the third fastening structure 203 are connected to the second connecting structure 201, after external force is applied to the second fastening structure 202 and the third fastening structure 203, the second fastening structure 202 and the third fastening structure 203 can be rotated relative to the second connecting structure 201 respectively, thereby achieving clamping of the first extension surface 302 and the second extension surface 303, which is beneficial to the testing of the stretching member 300 and improves the safety of the application of the stretching member 300.

[0053] In some embodiments, the second connection structure 201 includes a second connection member 2011 and a second connection head 2012, the second connection head 2012 is connected to the second connection member 2011, and the second connection head 2012 is located on a side of the second connection member 2011 away from the first clamping assembly 100. Exemplarily, the second connection member 2011 includes but is not limited to a columnar shape, and the second connection head 2012 and the second connection member 2011 can be fixed by bolts to ensure that they will not loosen.

[0054] In the above-mentioned implementation process, the second connecting head 2012 is connected to the second connecting member 2011, and the second connecting member 2011 is provided with a second fastening structure 202 and a third fastening structure 203. After applying an external force to the second fastening structure 202 and the third fastening structure 203, the first extension surface 302 and the second extension surface 303 can be clamped, and then an external force is applied to the second connecting head 2012 to stretch the first extension surface 302 and the second extension surface 303, which is beneficial to the testing of the part to be stretched 300 and improves the safety of the application of the part to be stretched 300.

[0055] In some embodiments, the second connecting member 2011 is configured as a first limiting groove 2013 and a second limiting groove 2014, the first limiting groove 2013 is configured to accommodate a partial structure of the second fastening structure 202, and the second limiting groove 2014 is configured to accommodate a partial structure of the third fastening structure 203.

[0056] Exemplarily, the first limiting groove 2013 and the second limiting groove 2014 can both be configured as an arc shape, the first limiting groove 2013 can form a certain covering for the second fastening structure 202, and the second limiting groove 2014 can form a certain covering for the third fastening structure 203, and in order to facilitate the disassembly of the second fastening structure 202 and the third fastening structure 203 from the second connecting member 2011, the first limiting groove 2013 extends along a preset direction to the end of the second connecting member 2011, and the second limiting groove 2014 extends along a preset direction to the end of the second connecting member 2011, so that the second fastening structure 202 and the third fastening structure 203 can both pass into or out of the corresponding grooves from the end of the second connecting member 2011.

[0057] In the above-mentioned implementation process, the second connecting structure 201 is adapted to the first limiting groove 2013, and the third connecting structure is adapted to the second limiting groove 2014, so that when an external force is applied to the second connecting structure 201, the second connecting structure 201 can be rotated relative to the first limiting groove 2013, thereby realizing the fastening of the first extension surface 302, and when an external force is applied to the third structure, the third connecting structure can be rotated relative to the second limiting groove 2014, thereby realizing the fastening of the second extension surface 303. The whole structure is easy to fasten, and can realize the fastening of the surfaces of the to-be-stretched part 300 on different sides, effectively verify the actual connection weaknesses between the different surfaces of the to-be-stretched part 300, quickly carry out welding process verification, and shorten the product development verification cycle.

[0058] In some embodiments, the second fastening structure 202 includes a first fastening frame 2021 and a first adjusting member 2022, the first fastening frame 2021 includes but is not limited to a U-shape, and the opening of the first fastening frame 2021 faces the second connecting member 2011, one end of the first fastening frame 2021 is configured in the first limiting groove 2013, and one end of the first adjusting member 2022 is passed through the first fastening frame 2021 and connected to the second connecting member 2011, so that when the first adjusting member 2022 is adjusted, one end of the first fastening frame 2021 rotates around the first limiting groove 2013, and the other end thereof abuts the first extension surface 302.

[0059] In the above-mentioned implementation process, one end of the first adjusting member 2022 is passed through the first fastening frame 2021 and is connected to the second connecting member 2011, so that when the first adjusting member 2022 is adjusted, one end of the first fastening frame 2021 can be driven to rotate around the first limiting groove 2013, and then the first extension surface 302 is pressed at the other end to achieve the fastening of the first extension surface 302, which is conducive to verifying the welding reliability between the first extension surface 302 and the fixed surface 301.

[0060] In some embodiments, the first adjusting member 2022 includes a first adjusting rod and a first limit head. For example, the first adjusting member 2022 is configured as a bolt, etc., and the first fastening frame 2021 is configured with a first connecting hole. The first connecting hole includes but is not limited to a waist-shaped hole. One end of the first adjusting rod is connected to the first limit head, and the other end thereof is passed through the first connecting hole and connected to the second connecting member 2011, wherein the outer diameter of the first adjusting rod is smaller than the aperture of the first connecting hole.

[0061] In the above-mentioned implementation process, the outer diameter of the first adjusting rod is smaller than the aperture of the first connecting hole. When the first adjusting rod is passed through the first connecting hole and connected to the second connecting member 2011, when the first adjusting rod is adjusted, the first fastening frame 2021 can be rotated around the first limiting groove 2013, thereby achieving the fastening of the first extension surface 302, which is conducive to verifying the welding reliability between the first extension surface 302 and the fixing surface 301.

[0062] In some embodiments, the second fastening structure 202 further includes a first fastening block 20231022, one end of which is detachably connected to the first fastening frame 2021, and the other end of which is configured to abut against the first extension surface 302. Exemplarily, one of the first fastening block 20231022 and the first fastening frame 2021 is configured with a protrusion, and the other is configured with a groove, wherein the protrusion is adapted to the groove to achieve a detachable connection between the first fastening block 20231022 and the first fastening frame 2021.

[0063] In some embodiments, the third fastening structure 203 includes a second fastening frame 2031 and a second adjusting member 2032, the second fastening frame 2031 includes but is not limited to a U-shape, and the opening of the second fastening frame 2031 faces the second connecting member 2011, one end of the second fastening frame 2031 is configured in the second limiting groove 2014, and one end of the second adjusting member 2032 is passed through the second fastening frame 2031 and connected to the second connecting member 2011, so that when the second adjusting member 2032 is adjusted, one end of the second fastening frame 2031 rotates around the second limiting groove 2014, and the other end thereof abuts against the second extension surface 303.

[0064] In the above-mentioned implementation process, one end of the second adjusting member 2032 is passed through the second fastening frame 2031 and is connected to the second connecting member 2011, so that when the second adjusting member 2032 is adjusted, one end of the second fastening frame 2031 can be driven to rotate around the second limiting groove 2014, and then the second extension surface 303 is pressed at the other end to achieve the fastening of the second extension surface 303, which is conducive to verifying the welding reliability between the second extension surface 303 and the fixed surface 301.

[0065] In some embodiments, the second adjusting member 2032 includes a second adjusting rod and a second limit head. For example, the second adjusting member 2032 is configured as a bolt, etc. The second fastening frame 2031 is configured with a second connecting hole. The second connecting hole includes but is not limited to a waist-shaped hole. One end of the second adjusting rod is connected to the second limit head, and the other end thereof is passed through the second connecting hole and connected to the second connecting member 2011, wherein the outer diameter of the second adjusting rod is smaller than the aperture of the second connecting hole.

[0066] In the above-mentioned implementation process, the outer diameter of the second adjusting rod is smaller than the aperture of the second connecting hole. When the second adjusting rod is passed through the second connecting hole and connected to the second connecting member 2011, when the second adjusting rod is adjusted, the second fastening frame 2031 can be rotated around the second limiting groove 2014, thereby achieving the fastening of the second extension surface 303, which is conducive to verifying the welding reliability between the second extension surface 303 and the fixed surface 301.

[0067] In some embodiments, the third fastening structure 203 further includes a second fastening block 20331022, one end of which is detachably connected to the second fastening frame 2031, and the other end of which is configured to abut against the second extension surface 303. Exemplarily, one of the second fastening block 20331022 and the second fastening frame 2031 is configured with a protrusion, and the other is configured with a groove, wherein the protrusion is adapted to the groove to achieve a detachable connection between the second fastening block 20331022 and the second fastening frame 2031.

[0068] In some embodiments, the first connection structure 101 includes a first connection member 1012 and a first connection head 1011, the first connection head 1011 is connected to the first connection member 1012, and the first connection head 1011 is located on a side of the first connection member 1012 away from the first fastening structure 102. Exemplarily, the first connection member 1012 includes but is not limited to a columnar shape, and the first connection head 1011 and the first connection member 1012 can be fixed by bolts to ensure that they will not loosen.

[0069] In the above-mentioned implementation process, the first connecting head 1011 is connected to the first connecting member 1012, and the first connecting member 1012 is provided with a first fastening structure 102. After an external force is applied to the first fastening structure 102, the fixed surface 301 can be clamped, and then an external force is applied to the first connecting head 1011 to stretch the fixed surface 301, which is beneficial to the testing of the part to be stretched 300 and improves the safety of the application of the part to be stretched 300.

[0070] In some embodiments, the first fastening structure 102 includes a mounting seat 1021 and a fastening block 1022 . The mounting seat 1021 is connected to the first connecting member 1012 , and the fastening block 1022 is connected to a side of the mounting seat 1021 away from the first connecting member 1012 for fastening the fixing surface 301 .

[0071] Exemplarily, the fastening block 1022 is configured with at least one, and the number of the fastening blocks 1022 can be set according to the actual length of the fixing surface 301. For example, three fastening blocks 1022 are configured, and the mounting seat 1021 is configured with a mounting groove 1024. The fastening block 1022 is connected to the mounting groove 1024, and the connection method can be fixed with bolts, and the position of the fastening block 1022 relative to the mounting seat 1021 can be adjusted through the mounting groove 1024.

[0072] In some embodiments, the first connector 1012 is provided with a first receiving groove 1013, which is configured to receive a part of the structure of the mounting seat 1021. For example, the first receiving groove 1013 is configured in a T-shape, and the first connector 1012 can be clamped to the mounting seat 1021 through the first receiving groove 1013. In order to adjust the position of the mounting seat 1021 relative to the first connector 1012, a scale line 1014 is provided on the first connector 1012. The scale line 1014 can be used to adjust the position of the mounting seat 1021 relative to the first connector 1012, so as to facilitate the test of the tensile member 300.

[0073] In some embodiments, the mounting seat 1021 is provided with a second receiving groove 1023 along the first direction, and the second receiving groove 1023 is configured to receive a part of the structure of the fixing surface 301. The second receiving groove 1023 can be used to adjust the position of the workpiece 300 to be stretched relative to the mounting seat 1021, so as to facilitate the testing of the workpiece 300 to be stretched.

[0074] In a second aspect, the present application also provides a testing device, comprising the stretching tool as described above.

[0075] In all the embodiments of the present application, "big" and "small" are relative, "more" and "less" are relative, and "up" and "down" are relative. The expressions of such relative terms are not elaborated in the embodiments of the present application.

[0076] It should be understood that the "in this embodiment", "in the embodiment of the present application" or "as an optional implementation" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in this embodiment", "in the embodiment of the present application" or "as an optional implementation" appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. Those skilled in the art should also be aware that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily required for the present application.

[0077] In the various embodiments of the present application, it should be understood that the size of the serial numbers of the above-mentioned processes does not necessarily mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0078] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A stretching tool, characterized in that: The stretching tool is configured to stretch a workpiece to be stretched, wherein the workpiece to be stretched is configured with a fixed surface distributed along a first direction and a first extension surface and a second extension surface distributed along a second direction, the first extension surface and the second extension surface are adjacent to or relatively distributed on the fixed surface, and the stretching tool comprises: a first clamping assembly, comprising a first connecting structure and a first fastening structure, wherein the first fastening structure is connected to the first connecting structure to form a first fastening station between the first connecting structure and the first fastening structure, wherein the first fastening station is configured to fasten the fixing surface; The second clamping assembly includes a second connecting structure, a second fastening structure and a third fastening structure. The second fastening structure and the third fastening structure are respectively connected to the second connecting structure to form a second fastening station between the second fastening structure and the second connecting structure and a third fastening station between the third fastening structure and the second connecting structure. The second fastening station is configured to fasten the first extension surface, and the third fastening station is configured to fasten the second extension surface.

2. The stretching tool according to claim 1, characterized in that: One end of the second fastening structure is hinged to the second connecting structure, and the other end forms a first fastening end, and the first fastening end is configured to fasten the first extension surface, and / or one end of the third fastening structure is hinged to the second connecting structure, and the other end forms a second fastening end, and the second fastening end is configured to fasten the second extension surface.

3. The stretching tool according to claim 1 or 2, characterized in that: The second connection structure includes a second connection member and a second connection head. The second connection head is connected to the second connection member, and the second connection head is located at a side of the second connection member away from the first clamping assembly.

4. The stretching tool according to claim 3, characterized in that: The second connecting member is configured as a first limiting groove and a second limiting groove, the first limiting groove is configured to accommodate a partial structure of the second fastening structure, and the second limiting groove is configured to accommodate a partial structure of the third fastening structure.

5. The stretching tool according to claim 4, characterized in that: The second fastening structure includes a first fastening frame and a first adjusting member, one end of the first fastening frame is configured in the first limiting groove, one end of the first adjusting member is passed through the first fastening frame and connected to the second connecting member, so that when the first adjusting member is adjusted, one end of the first fastening frame rotates around the first limiting groove, and the other end thereof abuts against the first extension surface.

6. The stretching tool according to claim 5, characterized in that: The first adjusting member includes a first adjusting rod and a first limiting head, the first fastening frame is provided with a first connecting hole, one end of the first adjusting rod is connected to the first limiting head, and the other end thereof is passed through the first connecting hole and connected to the second connecting member, wherein the outer diameter of the first adjusting rod is smaller than the aperture of the first connecting hole.

7. The stretching tool according to claim 5, characterized in that: The second fastening structure further includes a first fastening block, one end of which is detachably connected to the first fastening frame, and the other end of which is configured to abut against the first extension surface.

8. The stretching tool according to claim 5, characterized in that: The third fastening structure includes a second fastening frame and a second adjusting member, one end of the second fastening frame is configured in the second limiting groove, one end of the second adjusting member is passed through the second fastening frame and connected to the second connecting member, so that when the second adjusting member is adjusted, one end of the second fastening frame rotates around the second limiting groove, and the other end thereof abuts against the second extension surface.

9. The stretching tool according to claim 8, characterized in that: The second adjusting member includes a second adjusting rod and a second limiting head, the second fastening frame is provided with a second connecting hole, one end of the second adjusting rod is connected to the second limiting head, and the other end thereof is passed through the second connecting hole and connected to the second connecting member, wherein the outer diameter of the second adjusting rod is smaller than the aperture of the second connecting hole.

10. The stretching tool according to claim 8, characterized in that: The third fastening structure further includes a second fastening block, one end of which is detachably connected to the second fastening frame, and the other end of which is configured to abut against the second extending surface.

11. The stretching tool according to claim 1, characterized in that: The first connection structure includes a first connection member and a first connection head. The first connection head is connected to the first connection member, and the first connection head is located at a side of the first connection member away from the first fastening structure.

12. The stretching tool according to claim 11, characterized in that: The first fastening structure includes a mounting seat and a fastening block. The mounting seat is connected to the first connecting member, and the fastening block is connected to a side of the mounting seat away from the first connecting member, so as to fasten the fixing surface.

13. The stretching tool according to claim 12, characterized in that: The first connecting member is provided with a first accommodating groove, and the first accommodating groove is configured to accommodate a partial structure of the mounting seat.

14. The stretching tool according to claim 12, characterized in that: The mounting seat is provided with a second accommodating groove along the first direction, and the second accommodating groove is configured to accommodate a partial structure of the fixing surface.

15. A testing device, characterized in that: Comprising the stretching tooling as described in any one of claims 1-14.

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