A test fixture

Abstract

The embodiment of the application provides a test tool, which comprises: a first base, a first force applying mechanism, a first clamping assembly and a supporting assembly are arranged on the first base, and the supporting assembly is used for supporting a component to be tested; a second base is arranged at a distance from the first base along the height direction of the first base, a second force applying mechanism and a second clamping assembly are arranged on the second base, the first clamping assembly is arranged opposite to the first clamping assembly, so that a clamping space is formed between the second clamping assembly and the first clamping assembly, and the clamping space is used for accommodating a fixed end of the component to be tested; the second base moves towards the first base along the height direction of the first base, can drive the second force applying mechanism to move synchronously, and then drives at least part of the first force applying mechanism to move along the stress direction of the component to be tested, so as to test the stress of the component to be tested. The scheme solves the problem that the test tool in the prior art cannot test the components whose forming direction is inconsistent with the stress direction.

Description

Technical Field

[0001] This application relates to the field of component testing technology, and more specifically, to a testing fixture. Background Technology

[0002] In existing technologies, crash test fixtures are typically designed for anti-collision beam structures. These beams are located on the front and rear sides of a vehicle, with the collision direction aligned with the forming direction. Conventional crash beam test fixtures are suitable for planar structures like anti-collision beams. During testing, the anti-collision beam is laid flat with its collision surface facing upwards, and both ends are clamped to apply force in the vertical direction. For example, a three-point bending test can be performed using a downward-pressing upper punch to simulate the collision force on the anti-collision beam. However, for structures such as the A-pillar and C-pillar of a vehicle, such as… Figure 6 As shown, its forming direction is Y-axis, while the collision direction in actual application is usually X-axis. After the clamping mechanism at both ends clamps the ends of the A-pillar, C-pillar and other structures, the original vertical force application mechanism can only apply Z-axis force and cannot apply X-axis force to the A-pillar, C-pillar and other structures. Therefore, it is impossible to use the existing collision beam test fixture to place and test the A-pillar, C-pillar and other structures.

[0003] Therefore, for components whose forming direction is inconsistent with the force direction (such as A-pillar tube beams and C-pillar tube beams), the current collision test fixtures cannot effectively verify the single-piece collision force in physical experiments.

[0004] No effective solution has yet been proposed to address the aforementioned technical issues. Summary of the Invention

[0005] This application provides a test fixture designed to improve the problem that existing test fixtures cannot test parts whose forming direction and force direction are inconsistent.

[0006] According to one aspect of the embodiments of this application, a test fixture is provided, comprising: a first base, on which a first force-applying mechanism, a first clamping assembly, and a support assembly are disposed, the support assembly being used to support a component to be tested; a second base, disposed at a distance from the first base along the height direction of the first base, on which a second force-applying mechanism and a second clamping assembly are disposed, the second clamping assembly being disposed opposite to the first clamping assembly to form a clamping space between the second clamping assembly and the first clamping assembly, the clamping space being used to accommodate the fixed end of the component to be tested; the first force-applying mechanism is in contact with the force-receiving end of the component to be tested, the second force-applying mechanism is in contact with the first force-applying mechanism, and the second base is moved toward the first base along the height direction of the first base, which can drive the second force-applying mechanism to move synchronously, thereby driving at least a portion of the first force-applying mechanism to move along the force direction of the component to be tested, so as to perform a force test on the component to be tested.

[0007] The embodiments of this application achieve the following technical effects: the forming direction of the component under test is the width direction of the first base, and the actual collision force direction of the component under test is the length direction of the first base. After the first clamping component and the second clamping component cooperate, a clamping space is formed, which can clamp the fixed end of the component under test and limit the circumferential runout of the component under test. The support component can be used to support the component under test. After the clamping space and the support component support and fix the two positions of the component under test, the position of the component under test is fixed. After the second force application mechanism cooperates with the first force application mechanism, pressure can be applied to the force-bearing end of the component under test, and the pressure is consistent with the collision force direction of the component under test in actual working conditions, that is, the simulation of the actual collision force of the component under test is realized. In this embodiment, the force application direction is consistent with the actual collision force direction of the component under test, and the component under test can be prevented from shaking during the force application process by the first clamping component, the second clamping component, and the support component, ensuring the stability of the force test process of the component under test and solving the problem that the test fixtures in the prior art cannot test parts whose forming direction and force direction are inconsistent.

[0008] Furthermore, the first force-applying mechanism has a first mating inclined surface, and the second force-applying mechanism has a second mating inclined surface. The first force-applying mechanism and the second force-applying mechanism abut against each other through the first mating inclined surface and the second mating inclined surface.

[0009] The above optional embodiments of this application achieve the following technical effects: by setting the inclined surfaces together, after the first and second inclined surfaces abut together, the second force-applying mechanism presses down, which can squeeze the first force-applying mechanism, so that the first force-applying mechanism moves in the horizontal direction and applies force to the force-receiving end.

[0010] Furthermore, the first force-applying mechanism includes: a drive guide rail, which is disposed on the first base and extends along the force direction of the component to be tested; and a first drive block, which is movably disposed along the length direction of the drive guide rail, with one side of the first drive block for contacting the force-bearing end and the other side of the first drive block for contacting the second force-applying mechanism, and the movement of the second force-applying mechanism can drive the first drive block to move relative to the drive guide rail.

[0011] The above optional embodiments of this application achieve the following technical effects: the first driving block is movably set along the driving guide rail, which can ensure that the first driving block always moves along the length direction of the driving guide rail during the movement, avoid the first driving block deviating from the direction, avoid the force applied to the force-bearing end deviating from the preset force application direction, and ensure that the force on the component under test during the test is consistent with the preset force application direction.

[0012] Furthermore, the first force-applying mechanism further includes: a travel limit member, which is connected to at least one of the drive guide rail and the first base, and a limit groove is formed between the travel limit member and any one of the first drive blocks, and at least a portion of the travel limit member and the other of the first drive blocks extends into the limit groove; and / or, a guide limit member, which is connected to at least one of the drive guide rail and the first base, and a portion of the guide limit member is disposed at a distance from the drive guide rail along the height direction of the first drive block.

[0013] The above optional embodiments of this application achieve the following technical effects: the stroke limiter can be used to limit the displacement of the first drive block in the length direction of the drive guide rail, control the stroke of the first drive block within a reasonable range, avoid the need for excessive displacement when the first drive block is subjected to force test, and save test time and cost; the guide limiter can limit the jumping of the first drive block in the height direction of the first base, and avoid test errors caused by the tilting of the first drive block during movement.

[0014] Furthermore, the test fixture also includes a detection device, which is mounted on the first base. The detection device includes at least a pressure detection element, which is connected to the first force application mechanism and contacts the first drive block to detect the force at the force-bearing end.

[0015] The above-mentioned optional embodiments of this application achieve the following technical effects: the detection device can be used to detect the working parameters of the component under test during the process of applying force to the component under test, and the pressure detection component provides real-time force feedback of the force-receiving end by detecting the force at the force-receiving end, which facilitates the subsequent analysis of the test results of the component under test. According to actual needs, the detection device can also include detection components such as cameras to detect and analyze the collision changes of the component under test.

[0016] Furthermore, the test fixture also includes a stop structure, which is located on the side of the fixed end opposite to the force-bearing end to restrict the movement of the fixed end in the force direction of the component under test.

[0017] The above-mentioned optional embodiments of this application achieve the following technical effects: the stop structure can restrict the displacement of the fixed end, and prevent the fixed end from moving freely in the direction of force to cause the overall displacement of the component under test, thereby causing the force-bearing end of the component under test to move, resulting in the failure of the collision force test of the component under test. When the fixed end cannot move freely due to the setting of the stop structure, the fixed situation after the component under test is installed on the vehicle can be simulated to ensure that after the force-bearing end is subjected to collision force, the component under test can undergo the same actual collision change as in actual driving, thereby realizing the collision test of the component under test.

[0018] Furthermore, the first clamping component has a first clamping groove, and the second clamping component has a second clamping groove, the first clamping groove and the second clamping groove forming a clamping space.

[0019] The above optional embodiments of this application achieve the following technical effects: the first clamping groove and the second clamping groove can cooperate to form a clamping space arranged along the circumference of the component to be tested, thereby limiting the circumferential runout of the component to be tested. Preferably, the opening of the first clamping groove matches the opening of the second clamping groove so that the clamping space should be a circumferentially closed space.

[0020] Furthermore, the second clamping assembly includes: a drive unit mounting platform, which is connected to the second base, and a drive unit is disposed within the drive unit mounting platform; a pressure block, on which a second clamping groove is formed, and the pressure block is connected to the output end of the drive unit. The drive unit is used to drive the pressure block to move relative to the second base along the height direction of the second base, so that the pressure block and the first clamping assembly form a clamping space.

[0021] The above-mentioned optional embodiments of this application achieve the following technical effects: the drive component mounting table can be used to install and fix the drive component, and the drive component can be used to drive the pressure block to move in order to adjust the position of the pressure block and ensure the clamping of the part to be tested. The separate drive component for driving the pressure block can facilitate the immediate and quick adjustment of the position of the pressure block as needed, and facilitate the adjustment of the height of the pressure block according to the actual test needs, thereby adjusting the distance between the pressure block and the first clamping component, which meets the fixing requirements of the part to be tested in the actual test.

[0022] Furthermore, the second clamping assembly also includes a safety stop, which is connected to the second base and is located on the side of the pressure block opposite to the second force application mechanism along the length of the second base.

[0023] The above-mentioned optional embodiments of this application achieve the following technical effects: by setting a safety stop block on the front side of the pressure block and making the height of the safety stop block greater than the height of the pressure block, the side of the safety stop block facing the second force application mechanism can form a safety stop surface, which prevents safety problems caused by the splashing and slippage of the test component, stop structure and other parts during the test, and achieves a safety protection function.

[0024] Furthermore, a plurality of first stop blocks are provided on the first base, and a plurality of second stop blocks are provided on the second base, with the plurality of first stop blocks and the plurality of second stop blocks being configured in a one-to-one correspondence.

[0025] The above-mentioned optional embodiments of this application achieve the following technical effects: the cooperative arrangement of the first stop block and the second stop block can ensure that there is sufficient operating space between the first base and the second base, and at the same time ensure that the various mechanisms set on the first base and the second base can be quickly aligned and matched, thereby improving testing efficiency. Attached Figure Description

[0026] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0027] Figure 1 This is a schematic diagram of the structure of the test fixture provided in one embodiment of this application;

[0028] Figure 2 This is a schematic diagram of the structure of the second base of the test fixture provided in one embodiment of this application;

[0029] Figure 3 This is a schematic diagram of the structure of the second clamping component of the test fixture provided in one embodiment of this application;

[0030] Figure 4 This is a schematic diagram of the structure of the first base of the test fixture provided in an embodiment of this application;

[0031] Figure 5 This is a schematic diagram of the structure of the first force-applying mechanism of the test fixture provided in an embodiment of this application;

[0032] Figure 6 This is a schematic diagram of the structure of the component under test provided in an embodiment of this application.

[0033] Explanation of reference numerals in the attached figures:

[0034] 10. First base;

[0035] 110. First force-applying mechanism; 111. First mating inclined surface; 112. Drive guide rail; 113. First drive block; 114. Stroke limit component; 1141. Stroke limit mounting seat; 1142. Stroke limit block; 115. Guide limit component; 1151. Guide limit mounting seat; 1152. Guide limit block; 116. Baffle; 117. Guide plate;

[0036] 120. First clamping assembly; 121. First clamping slot;

[0037] 130. Support component; 140. First stop block;

[0038] 20. Second base;

[0039] 210. Second force-applying mechanism; 211. Second mating inclined surface; 212. Drive block mounting base; 213. Second drive block;

[0040] 220. Second clamping assembly; 221. Second clamping groove; 222. Safety stop; 223. Pressure block; 224. Drive component mounting platform; 225. Drive component; 226. Pad; 227. Limit control block;

[0041] 230. Second stop block;

[0042] 30. Component to be tested; 310. Force-bearing end; 320. Fixed end;

[0043] 40. Detection device; 410. Pressure detection element; 420. Electrical box; 430. Pneumatic pipeline;

[0044] 50. Stop structure;

[0045] 60. Lifting components. Detailed Implementation

[0046] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0047] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0048] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0049] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art. In the drawings, for clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to denote the same devices, and therefore their description will be omitted.

[0050] Combination Figures 1 to 6 As shown, according to a specific embodiment of this application, a test fixture is provided.

[0051] Specifically, the test fixture includes a first base 10 and a second base 20. The first base 10 is provided with a first force-applying mechanism 110, a first clamping assembly 120, and a support assembly 130. The support assembly 130 supports the component 30 to be tested. Along the height direction of the first base 10, the second base 20 is positioned at a distance from the first base 10. The second base 20 is provided with a second force-applying mechanism 210 and a second clamping assembly 220. The second clamping assembly 220 is positioned opposite to the first clamping assembly 120, forming a clamping space between them. The space includes a fixed end 320 for accommodating the component under test 30. When the test fixture tests the component under test 30, the fixed end 320 of the component under test 30 is located in the clamping space. The first force-applying mechanism 110 is in contact with the force-receiving end 310 of the component under test 30, and the second force-applying mechanism 210 is in contact with the first force-applying mechanism 110. The second base 20 moves toward the first base 10 along the height direction of the first base 10, which can drive the second force-applying mechanism 210 to move synchronously, thereby driving at least part of the first force-applying mechanism 110 to move along the force direction of the component under test 30, so as to perform a force test on the component under test 30.

[0052] The embodiments of this application achieve the following technical effects: the forming direction of the component under test 30 is the width direction of the first base 10, the actual collision force direction of the component under test 30 is the length direction of the first base 10, the first clamping assembly 120 and the second clamping assembly 220 cooperate to form a clamping space, which can clamp the fixed end 320 of the component under test 30 and limit the circumferential runout of the component under test 30. The support assembly 130 can be used to support the component under test 30. After the clamping space and the support assembly 130 support and fix the two positions of the component under test 30, the position of the component under test 30 is fixed. The second force application mechanism 210 and the first The force-applying mechanism 110, in conjunction with the force-receiving end 310 of the component under test 30, applies pressure that is consistent with the direction of the collision force of the component under test 30 in actual working conditions. This achieves the simulation of the actual collision force of the component under test 30. In this embodiment, the direction of the applied force is consistent with the actual collision force of the component under test 30. Furthermore, during the force application process, the first clamping component 120, the second clamping component 220, and the support component 130 can prevent the component under test 30 from shaking, ensuring the stability of the force testing process of the component under test 30. This solves the problem in the prior art that the testing fixture cannot test parts whose forming direction and force direction are inconsistent.

[0053] like Figure 1As shown, the Y direction is the forming direction of the component under test 30, which is also the width direction of the first base 10 and the second base 20; the X direction is the force direction of the component under test 30, which is also the length direction of the first base 10 and the second base 20; and the Z direction is the height direction of the first base 10 and the second base 20. It should be understood that the force direction of the component under test 30 refers to the collision force direction of the component under test 30 during actual application. It should be understood that the test fixture in this embodiment can be used to perform collision tests on various components under test 30, such as A-pillar tube beams and C-pillar tube beams. The force direction of the component under test 30 is consistent with the force direction of the test fixture, and the structural shape of the component under test 30 can be adapted to the clamping structure and support structure in this embodiment.

[0054] In this embodiment, by driving the second base 20 to move, the second force-applying mechanism 210 is driven to move, so that only one drive mechanism is set up to drive the second base 20. That is, after the second base 20 is assembled with the first base 10, the drive mechanism can be reused to apply force, reducing the number of parts of the overall tooling and reducing manufacturing costs.

[0055] In one exemplary embodiment of this application, the support assembly 130 includes a support column and a groove structure located at the end of the support column, with at least a portion of the tube wall of the component under test 30 located within the groove. Depending on actual needs, the number of support assemblies 130 can be increased, and the position of the support assemblies 130 can be adjusted to make the clamping of the component under test 30 more stable.

[0056] It should be noted that there are various structures for realizing the motion process of "the second base 20 moving toward the first base 10 along the height direction of the first base 10, which can drive the second force application mechanism 210 to move synchronously, thereby driving at least part of the first force application mechanism 110 to move along the force direction of the component to be measured 30". Its main purpose is to convert the vertical force into the horizontal force. For example, a gear rack pair structure, a lead screw and nut structure, a linkage mechanism and other transmission mechanisms can be used to transmit and steer the force.

[0057] Furthermore, the test fixture also includes a detection device 40, which is disposed on the first base 10. The detection device 40 includes at least a pressure detection element 410, which is connected to the first force application mechanism 110. The pressure detection element 410 is used to detect the force on the force-bearing end 310.

[0058] The above optional embodiments of this application achieve the following technical effects: the detection device 40 can be used to detect the working parameters of the component 30 under test during the process of applying force to the component 30 under test; the pressure detection element 410 provides real-time force feedback of the force-receiving end 310 by detecting the force on the force-receiving end 310, which facilitates the subsequent analysis of the test results of the component 30 under test; according to actual needs, the detection device 40 may also include detection elements such as a camera to detect and analyze the collision changes of the component 30 under test.

[0059] In one exemplary embodiment of this application, the pressure detection element 410 is a nitrogen cylinder. The detection device 40 also includes components such as an electrical box 420 and a pneumatic pipeline 430. Two pressure detection elements 410 are provided, arranged side by side, and both are connected to the first force application mechanism 110 to make the measured force more accurate. The electrical box 420 is connected to the pressure detection element 410 through the pneumatic pipeline 430 to obtain the pressure change data of the pressure detection element 410 in real time.

[0060] Furthermore, the first force-applying mechanism 110 has a first mating inclined surface 111, and the second force-applying mechanism 210 has a second mating inclined surface 211. The first force-applying mechanism 110 and the second force-applying mechanism 210 abut against each other through the first mating inclined surface 111 and the second mating inclined surface 211.

[0061] The above optional embodiments of this application achieve the following technical effects: by setting the inclined surfaces together, after the first inclined surface 111 and the second inclined surface 211 come into contact, the second force-applying mechanism 210 presses down, which can squeeze the first force-applying mechanism 110, so that the first force-applying mechanism 110 moves in the horizontal direction, thereby applying force to the force-receiving end.

[0062] It should be understood that the downward pressing of the second force-applying mechanism 210 refers to the movement of the second force-applying mechanism 210 toward the first base 10 in the height direction, generating a Z-direction force (see reference). Figure 6 As shown, after the first mating inclined surface 111 and the second mating inclined surface 211 abut against each other, an abutment is generated in the X direction (reference). Figure 1 As shown, the driving force in the direction of the force on the component 30 under test is used to drive the first force-applying mechanism 110 to move along the X direction.

[0063] Furthermore, the first force-applying mechanism 110 includes a drive rail 112 and a first drive block 113. The drive rail 112 is disposed on the first base 10, and the length direction of the drive rail 112 extends along the force direction of the component to be tested 30. The first drive block 113 is movably disposed along the length direction of the drive rail 112. One side of the first drive block 113 is used to contact the force-receiving end 310, and the second side of the first drive block 113 is used to contact the second force-applying mechanism 210. The movement of the second force-applying mechanism 210 can drive the first drive block 113 to move relative to the drive rail 112.

[0064] The above optional embodiments of this application achieve the following technical effects: the first driving block 113 is movably set along the driving guide rail 112, which can ensure that the first driving block 113 always moves along the length direction of the driving guide rail 112 during the movement, avoid the first driving block 113 deviating from the direction, avoid the force applied to the force-bearing end 310 deviating from the preset force application direction, and ensure that the force received by the test component 30 during the test is consistent with the preset force application direction.

[0065] The pressure detection element 410 contacts the first drive block 113 to detect the force on the force-bearing end 310.

[0066] In one exemplary embodiment of this application, such as Figure 5 As shown, the drive rail 112 has two ends arranged along its length, and the height of the two ends is greater than the height of the middle drive rail 112. The top of the side wall of the first end is connected by a baffle 116 so that the first end forms a receiving space, which can be used to accommodate the pressure detection element 410. The upper surface of the middle drive rail 112 is provided with a guide plate 117 to support the first drive block 113 and prevent the first drive block 113 from directly pressing the drive rail 112. The side wall of the second end facing the first end is provided with a guide plate 117. The guide plate 117 can prevent the second force application mechanism 210 from directly pressing against the side wall of the drive rail 112 after assembly, and prevent the impact force of the second force application mechanism 210 during the pressing process from causing wear to the drive rail 112. The thickness and number of layers of the guide plate 117 can be determined according to actual needs.

[0067] In one exemplary embodiment of this application, such as Figure 2 and Figure 5As shown, the second force-applying mechanism 210 includes a drive block mounting base 212 and a second drive block 213. The second drive block 213 is provided with a second mating inclined surface 211, and the first drive block 113 is provided with a first mating inclined surface 111. When the second base 20 presses down, it drives the second drive block 213 to press down, so that the second drive block 213 gradually embeds between the end of the first drive block 113 and the drive guide rail 112. During the pressing process, the second mating inclined surface 211 abuts against the first mating inclined surface 111, pushing the first drive block 113 to move. Specifically, both the first drive block 113 and the second drive block 213 can be wedge-shaped drive blocks.

[0068] Furthermore, the first force-applying mechanism 110 also includes a travel limit member 114, which is connected to at least one of the drive guide rail 112 and the first base 10. The travel limit member 114 and either the first drive block 113 have a limit groove, and at least a portion of the other travel limit member 114 and the first drive block 113 extends into the limit groove to limit the movement of the first drive block 113 in the length direction of the drive guide rail 112.

[0069] The above optional embodiments of this application achieve the following technical effects: the stroke limiter 114 can be used to limit the displacement of the first drive block 113 in the length direction of the drive guide rail 112, control the stroke of the first drive block 113 within a reasonable range, avoid the first drive block 113 from needing to make excessive displacement when performing force test, and save test time and cost.

[0070] In one exemplary embodiment of this application, such as Figure 5 As shown, the travel limiting member 114 includes a travel limiting mounting base 1141 and a travel limiting block 1142. The travel limiting mounting base 1141 is located outside the drive guide rail 112 and connected to the drive guide rail 112. The travel limiting block 1142 passes through the travel limiting mounting base 1141 and extends along the width direction of the drive guide rail 112. A limiting groove is formed on the first drive block 113, and the travel limiting block 1142 extends into the limiting groove to limit the movement of the first drive block 113 in the length direction of the drive guide rail 112. Specifically, the extension length of the limiting groove in the length direction of the drive guide rail 112 is the travel range of the first drive block 113. Preferably, there are two travel limiting members 114, and the two travel limiting members 114 are arranged opposite each other along the width direction of the drive guide rail 112.

[0071] Furthermore, the first force-applying mechanism 110 also includes a guide limiting member 115, which is connected to at least one of the drive rail 112 and the first base 10. A portion of the guide limiting member 115 is disposed at a distance from the drive rail 112 along the height direction of the first drive block 113, so that a guide space is formed between the guide limiting member 115 and the drive rail 112, and a portion of the first drive block 113 extends into the guide space.

[0072] The above optional embodiments of this application achieve the following technical effects: the guide limiter 115 can limit the jumping of the first drive block 113 in the height direction of the first base 10, and avoid the test error problem caused by the tilting of the first drive block 113 during the movement.

[0073] In one exemplary embodiment of this application, such as Figure 5 As shown, the guide limiting member 115 includes a guide limiting mounting base 1151 and a guide limiting block 1152. The guide limiting mounting base 1151 is located outside the drive guide rail 112 and connected to the drive guide rail 112. The guide limiting block 1152 is located at the top of the guide limiting mounting base 1151 and connected to the guide limiting mounting base 1151. A portion of the guide limiting block 1152 extends along the width direction of the drive guide rail 112 to form a stepped surface facing the bottom of the drive guide rail 112. The edge of the first drive block 113 abuts against the stepped surface. The stepped surface can effectively limit the jump of the first drive block 113 in the height direction of the drive guide rail 112. Preferably, there are two guide limiting members 115, and the two guide limiting members 115 are arranged opposite each other along the width direction of the drive guide rail 112.

[0074] Furthermore, the test fixture also includes a stop structure 50, which is disposed on the side of the fixed end 320 away from the force-bearing end 310 to restrict the movement of the fixed end 320 in the force direction of the component under test 30.

[0075] The above-mentioned optional embodiments of this application achieve the following technical effects: The stop structure 50 can restrict the displacement of the fixed end 320, preventing the fixed end 320 from moving freely in the force direction and causing the overall displacement of the component under test 30, thereby causing the force-bearing end 310 of the component under test 30 to move, resulting in the failure of the collision force test of the component under test 30. When the fixed end 320 cannot move freely due to the setting of the stop structure 50, the fixed situation after the component under test 30 is installed on the vehicle can be simulated to ensure that after the force-bearing end 310 is subjected to collision force, the component under test 30 can undergo the same actual collision change as in actual driving, thereby realizing the collision test of the component under test 30.

[0076] Optionally, the stop structure 50 can be a stop plate, a stop ring, a stop block, or the like.

[0077] Furthermore, the first clamping component 120 has a first clamping groove 121, and the second clamping component 220 has a second clamping groove 221, with the first clamping groove 121 and the second clamping groove 221 forming a clamping space.

[0078] The above optional embodiments of this application achieve the following technical effects: the first clamping groove 121 and the second clamping groove 221 can cooperate to form a clamping space arranged along the circumference of the component to be tested 30, which restricts the circumferential movement of the component to be tested 30. Preferably, the opening of the first clamping groove 121 matches the opening of the second clamping groove 221 so that the clamping space should be a circumferentially closed space.

[0079] Furthermore, the second clamping assembly 220 includes a drive mounting platform 224 and a pressure block 223. The drive mounting platform 224 is connected to the second base 20, and a drive member 225 is disposed inside the drive mounting platform 224. A second clamping groove 221 is provided on the pressure block 223, and the pressure block 223 is connected to the output end of the drive member 225. The drive member 225 is used to drive the pressure block 223 to move relative to the second base 20 along the height direction of the second base 20, so that the pressure block 223 and the first clamping assembly 120 form a clamping space.

[0080] The above-mentioned optional embodiments of this application achieve the following technical effects: the drive component mounting platform 224 can be used to install and fix the drive component 225, and the drive component 225 can be used to drive the pressure block 223 to move, so as to adjust the position of the pressure block 223 and ensure the clamping of the component 30 to be tested. The separate drive component 225 for driving the pressure block 223 can facilitate the timely and quick adjustment of the position of the pressure block 223 as needed, and facilitate the adjustment of the height of the pressure block 223 according to the actual test needs, thereby adjusting the distance between the pressure block 223 and the first clamping component 120, and meeting the fixing requirements of the component 30 to be tested in the actual test.

[0081] Preferably, the drive component 225 is a cylinder.

[0082] In one exemplary embodiment of this application, the second clamping assembly 220 further includes a limit control block 227 disposed on the drive mounting stage 224. The limit control block 227 can be used to limit the stroke of the drive 225 to avoid connection instability caused by excessive stroke of the pressure block 223.

[0083] In one exemplary embodiment of this application, the second clamping assembly 220 further includes a pad 226, which is disposed between the pressure block 223 and the drive component mounting platform 224. The pad 226 is connected to a safety stop 222. The pad 226 can be used to separate the drive component mounting platform 224 from the pressure block 223, avoiding damage caused by direct collision between the pressure block 223 and the drive component mounting platform 224 during movement. Optionally, the pad 226 can move synchronously with the pressure block 223, and the drive component 225 drives the pressure block 223 to move synchronously through the pad 226. Alternatively, the position of the pad 226 can be fixed, and the output end of the drive component 225 can pass through the pad 226 and connect to the pressure block 223, so that the drive component 225 only drives the pressure block 223 to move.

[0084] Furthermore, the second clamping assembly 220 also includes a safety stop 222, which is connected to the second base 20. Along the length of the second base 20, the safety stop 222 is located on the side of the pressure block 223 that is away from the second force application mechanism 210. The height of the safety stop 222 in the height direction of the second base 20 is greater than the height of the pressure block 223 in the height direction of the second base 20.

[0085] The above optional embodiments of this application achieve the following technical effects: by setting a safety stop 222 on the front side of the pressure block 223, and making the height of the safety stop 222 greater than the height of the pressure block 223, the side of the safety stop 222 facing the second force application mechanism 210 can form a safety stop surface, preventing safety problems caused by the splashing and slippage of the test component 30, the stop structure 50 and other parts during the test, and achieving a safety protection function.

[0086] Furthermore, a plurality of first stop blocks 140 are provided on the first base 10, and a plurality of second stop blocks 230 are provided on the second base 20. The plurality of first stop blocks 140 and the plurality of second stop blocks 230 are provided in a one-to-one correspondence. When the end of the first stop block 140 abuts against the end of the corresponding second stop block 230, the second clamping component 220 and the first clamping component 120 form a clamping space.

[0087] The above optional embodiments of this application achieve the following technical effects: the cooperative arrangement of the first stop block 140 and the second stop block 230 can ensure that there is sufficient operating space between the first base 10 and the second base 20, and at the same time ensure that the various mechanisms set on the first base 10 and the second base 20 can be quickly aligned and matched, thereby improving testing efficiency.

[0088] In one exemplary embodiment of this application, both the second base 20 and the first base 10 are provided with a plurality of lifting components 60 to facilitate the disassembly, assembly and relocation of the second base 20 and the first base 10 as needed.

[0089] This application also provides a preferred embodiment of a collision verification fixture for A-pillar thermal expansion tube beam components.

[0090] It should be noted that the conventional strength of hot-expanded tube beams can reach 2GPa, but due to product and process characteristics, there may be instances where the parts do not adhere to the mold at the corners. Therefore, part-level bending tests are often required to verify the mechanical properties of the parts. The collision test fixture structure in this embodiment can perform physical verification of the collision force of parts on the vehicle body coordinates based on the stamping equipment, especially for parts where the collision force is inconsistent with the stamping direction.

[0091] Specifically, the tooling includes an upper mold (i.e., the aforementioned second base 20), a lower mold (i.e., the aforementioned first base 10), a bent pipe finished part (in this embodiment, it refers to the A-pillar hot air expansion pipe beam part, also known as the A-pillar upper side beam, i.e. the aforementioned test part 30), a CAM mechanism (i.e., a wedge mechanism), and a guide sliding mechanism (including the aforementioned first force application mechanism 110, such as the drive guide rail 112, the stroke limit member 114, and the guide limit member 115).

[0092] The horizontally arranged wedge drive block of the CAM mechanism is equivalent to the aforementioned first drive block 113, and the vertically arranged wedge drive block of the CAM mechanism is equivalent to the aforementioned second drive block 213.

[0093] The technical solution in this embodiment is based on the tooling design of the A-pillar of the vehicle body coordinate system. The lower mold is equipped with a lifting mechanism (at least 2 support points). The lifting mechanism includes the aforementioned first clamping component 120 and support component 130. When pressed down, the end of the upper beam of the A-pillar (i.e., the fixed end 320 of the component under test 30) closes and compacts, while the other end (i.e., the force-bearing end 310 of the component under test 30) applies lateral force through inclined extrusion based on the CAM design principle of stamping mold, which meets the lateral force requirements of collision verification. The cylinder and electrical box 420 connected to the first drive block 113 can effectively monitor the real-time force of the upper beam of the A-pillar, effectively meeting the real-time force detection requirements of collision verification.

[0094] The tooling in this embodiment can verify the stress in the forming direction based on the uniqueness of the new hot air expansion process. At the same time, it can effectively monitor the real-time stress of the parts based on equipment such as cylinders and electrical box 420, providing technical support for subsequent product design.

[0095] In this application, "multiple" refers to two or more.

[0096] In this application, unless otherwise expressly defined, 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 between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0097] The terms “first,” “second,” “third,” “fourth,” etc., in this application (if present) are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0098] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0099] Unless otherwise specified, all steps in this application may be performed sequentially or randomly. For example, if the method includes steps A and B, it means that the method may include steps A and B performed sequentially, or it may include steps B and A performed sequentially. For example, if the method may also include step C, it means that step C may be added to the method in any order. For example, the method may include steps A, B, and C, or it may include steps A, C, and B, or it may include steps C, A, and B, etc.

Claims

1. A test fixture, characterized by, include: A first base (10) is provided with a first force application mechanism (110), a first clamping assembly (120) and a support assembly (130), wherein the support assembly (130) is used to support the component to be tested (30); The second base (20) is arranged at a distance from the first base (10) along the height direction of the first base (10). The second base (20) is provided with a second force application mechanism (210) and a second clamping assembly (220). The second clamping assembly (220) is arranged opposite to the first clamping assembly (120) so that a clamping space is formed between the second clamping assembly (220) and the first clamping assembly (120). The clamping space is used to accommodate the fixed end (320) of the component to be tested (30). The first force-applying mechanism (110) contacts the force-receiving end (310) of the component under test (30), the second force-applying mechanism (210) contacts the first force-applying mechanism (110), and the second base (20) moves toward the first base (10) along the height direction of the first base (10), which can drive the second force-applying mechanism (210) to move synchronously, thereby driving at least a portion of the first force-applying mechanism (110) to move along the force direction of the component under test (30) to perform a force test on the component under test (30).

2. The test fixture of claim 1, wherein The first force-applying mechanism (110) has a first mating inclined surface (111), and the second force-applying mechanism (210) has a second mating inclined surface (211). The first force-applying mechanism (110) and the second force-applying mechanism (210) abut against each other through the first mating inclined surface (111) and the second mating inclined surface (211).

3. The test fixture of claim 2, wherein, The first force-applying mechanism (110) includes: A drive rail (112) is disposed on the first base (10), and the length direction of the drive rail (112) extends along the force direction of the component to be tested (30). The first driving block (113) is movably disposed along the length direction of the driving guide rail (112). One side of the first driving block (113) is used to contact the force receiving end (310), and the second side of the first driving block (113) is used to contact the second force applying mechanism (210). The movement of the second force applying mechanism (210) can drive the first driving block (113) to move relative to the driving guide rail (112).

4. The test fixture of claim 3, wherein The first force-applying mechanism (110) further includes: A travel limiter (114) is connected to at least one of the drive guide rail (112) and the first base (10). A limit groove is formed between the travel limiter (114) and either the first drive block (113). At least a portion of the other travel limiter (114) and the first drive block (113) extends into the limit groove; and / or, A guide limiter (115) is connected to at least one of the drive rail (112) and the first base (10), and a portion of the guide limiter (115) is disposed at a distance from the drive rail (112) along the height direction of the first drive block (113).

5. The test fixture of claim 3, wherein The test fixture also includes: A detection device (40) is disposed on the first base (10). The detection device (40) includes at least a pressure detection element (410). The pressure detection element (410) is connected to the first force application mechanism (110) and contacts the first drive block (113) to detect the force on the force-receiving end (310).

6. The test fixture of claim 1, wherein The test fixture also includes: A stop structure (50) is provided on the side of the fixed end (320) away from the force-bearing end (310) to restrict the movement of the fixed end (320) in the force direction of the component to be tested (30).

7. The test fixture of claim 1, wherein The first clamping component (120) has a first clamping groove (121), and the second clamping component (220) has a second clamping groove (221). The first clamping groove (121) and the second clamping groove (221) enclose the clamping space.

8. The test fixture of claim 7, wherein, The second clamping assembly (220) includes: A drive component mounting platform (224) is connected to the second base (20), and a drive component (225) is provided inside the drive component mounting platform (224); A pressure block (223) is provided with a second clamping groove (221). The pressure block (223) is connected to the output end of the drive member (225). The drive member (225) is used to drive the pressure block (223) to move relative to the second base (20) along the height direction of the second base (20) so that the pressure block (223) and the first clamping assembly (120) form the clamping space.

9. The test fixture of claim 8, wherein, The second clamping assembly (220) further includes: Safety stop (222), which is connected to the second base (20) and is located on the side of the pressure block (223) away from the second force application mechanism (210) along the length of the second base (20).

10. The test fixture of any one of claims 1-9, wherein, The first base (10) is provided with a plurality of first stop blocks (140), and the second base (20) is provided with a plurality of second stop blocks (230). The plurality of first stop blocks (140) and the plurality of second stop blocks (230) are provided in a one-to-one correspondence.

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