A tool clamp and bonding method for damping the ribs of a crash test dummy chest

Abstract

This invention relates to the field of collision dummy technology, and discloses a tooling fixture and bonding method for damping the ribs of a collision dummy's chest. The fixture includes: a support assembly module; a lifting pre-compression module, a positioning tooling module, and a power screw module fixed to the support assembly module; the support assembly module includes a support frame platform and a fixed fixture base, a pre-compression mold support, and a movable slide rail fixed to the support frame platform; the lifting pre-compression module includes a second motor, a damping pressure head, and a lifting slide, the damping pressure head being driven by the second motor to move up and down on the lifting slide; the power screw module includes a first motor, a threaded screw, and a power slide, the first motor driving the power slide to perform axial linear motion through the threaded screw, thereby driving the damping pressure head to work. This method can control the pressure applied during pre-bending and bonding of the damping strip, avoiding damage to the damping structure and viscoelastic properties, and controlling the mechanical stability of each rib.

Description

Technical Field

[0001] This invention relates to the field of collision dummy technology, and more particularly to a tooling fixture and bonding method for damping the ribs of a collision dummy's chest. Background Technology

[0002] With rapid societal progress and the improvement of living standards in my country, automobiles have become commonplace in households. However, this has also led to a surge in car accidents, making traffic safety a serious concern. Statistics show that traffic accidents are the leading cause of injury-related death and the third leading cause of premature death in my country. Therefore, addressing the issue of car crash safety has become a pressing challenge for the automotive industry. Since real crash tests are not feasible, using suitable crash dummies has become an effective way to obtain data on human injury responses. This method can effectively simulate crash scenarios, helping researchers understand the impact of collisions on the human body. Therefore, selecting appropriate crash dummies for testing is crucial for solving the problem of car crash safety.

[0003] Among all injuries caused by traffic accidents, chest injuries occur frequently, becoming a leading cause of occupant injury and death. In traffic accident fatalities or serious injuries, chest injuries account for 30% of all such incidents. Furthermore, chest injuries rank second among all fatal and serious injuries caused by car crashes, second only to traumatic brain injury. The ribs of a dummy are the primary bearers of chest response, composed of metal and damping materials. The chest structure is complex, including metal layers, adhesive layers, and damping layers. The damping unit is crucial for accurately describing the "buffering effect" of the chest and for studying the impact mechanics response of the ribs. Adhesiveted to the interior of the metal ribs, the addition of damping materials enhances the bio-realism of the chest in frontal crash tests. To ensure the reliability of the dummy's chest response, the mechanical properties of each rib must be kept within a certain range. This requires considering not only material properties and the trends of external environmental changes but also controlling the mechanical stability of the bond between the damping material and the spring steel. Therefore, research and solutions regarding the controllability of the rib bond have been developed.

[0004] Traditional rib damping bonding is primarily done manually by hand. During the bonding process, the lack of suitable clamping tools makes pre-bending and bonding of the damping strips extremely inconvenient. After applying adhesive and applying pressure for drying, traditional C-clamps are often used for multi-point fixation, which cannot guarantee uniform pressure on the damping strips, and the correct positioning of the damping strips cannot be guaranteed. This results in variations in the mechanical response of each rib, thus affecting the reliability of the dummy's chest response.

[0005] Therefore, there is an urgent need for a tooling fixture and bonding method for damping the ribs of a collision dummy's chest. This method can improve the efficiency of the bonding tooling for the ribs of the dummy's chest during production. By setting a first pressure sensor inside the damping pre-compression mold of the tooling fixture, the applied pressure can be measured when the damping strip is pressed and bonded, thus controlling the mechanical stability of each rib and achieving high-precision, high-efficiency, and mass production. At the same time, a second pressure sensor is set outside the damping pressure head of the tooling fixture, which can control the pressure applied by the damping pressure head and prevent damage to the structure and viscoelastic properties of the damping. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention provides a tooling fixture and bonding method for damping the ribs of a collision dummy's chest. This method can improve the efficiency of the bonding tooling for the ribs of the dummy's chest during production, control the mechanical stability of each rib, and protect the structure and viscoelastic properties of the damping.

[0007] This invention provides a tooling fixture for damping the ribs of a collision dummy's chest, comprising:

[0008] Support assembly module; lifting preload module, positioning tooling module and power screw module fixed on the support assembly module;

[0009] The support assembly module includes a support frame platform and a fixed fixture base, a pre-compression mold support, and a movable slide rail fixed on the support frame platform, which are used to support the fixed positioning tooling module, the lifting pre-compression module, and the power screw module.

[0010] The lifting pre-compression module includes a No. 2 motor, a damping pressure head, and a lifting slide. The damping pressure head moves up and down on the lifting slide under the drive of the No. 2 motor to pre-compress and shape the damping strip and apply pressure for bonding.

[0011] The positioning fixture module includes a limiting block for positioning and clamping the ribs, and for positioning the pre-pressed arc-shaped damping strip.

[0012] The power screw module includes a No. 1 motor, a threaded screw, and a power slide. The No. 1 motor drives the power slide to perform axial linear motion through the threaded screw, which in turn drives the damping pressure head to work and achieve the pressure bonding of the damping strip.

[0013] Furthermore, the supporting frame platform, fixed fixture base, pre-compression mold support, and movable slide rail are integrally machined.

[0014] Furthermore, the lifting preload module also includes: a damping preload mold, a first pressure sensor, and a second pressure sensor;

[0015] The damping pre-compression mold is fixed on the pre-compression mold support, which is symmetrically arranged on both sides of the fixed clamp base. The lifting slide is located at the center of the fixed clamp base, and the damping pressure heads are symmetrically arranged on both sides of the lifting slide, with the two symmetrical damping pressure heads fixedly connected in the middle. The second motor is located below the lifting slide and is used to drive the lifting slide to rise or fall. The first pressure sensor is located inside the damping pre-compression mold and is used to measure the applied pressure when pre-compressing and shaping the damping strip. The second pressure sensor is located outside the damping pressure head and is used to measure the applied pressure when applying pressure to bond the damping strip.

[0016] Furthermore, the positioning fixture module also includes: a fixed rib clamp, a raceway hole, a sliding rib clamp, a dovetail groove slide, and a rib support;

[0017] The fixed rib clamp is fixed to the fixed clamp base, and the raceway holes are set at both ends of the fixed rib clamp for fixing and supporting the ribs; the dovetail groove slide is opened on the fixed clamp base, and the sliding rib clamp is slidably connected to the fixed clamp base through the dovetail groove slide for adjusting the ribs; the rib supports are symmetrically arranged on both sides of the fixed rib clamp, one end of the rib support is fixedly connected to the fixed rib clamp through the raceway hole on the fixed rib clamp, and the other end is fixedly connected to the sliding rib clamp; the limiting block is set on the inner side of the sliding rib clamp for positioning and clamping the ribs, and for positioning the pre-compressed arc-shaped damping strip.

[0018] Furthermore, the power screw module also includes: a movable slide and a screw support;

[0019] The movable slide is located on both sides of the supporting frame platform and is mounted on the movable slide rail, sliding along the movable slide rail; the lead screw support is fixed on the movable slide, and the two ends of the threaded lead screw are respectively fixed on the lead screw supports on both sides; the power slide is mounted on the threaded lead screw and slides left and right through the threaded lead screw; the No. 1 motor is located on the outside of the lead screw support and is connected to the threaded lead screw, used to drive the power slide to perform axial linear motion through the threaded lead screw.

[0020] The present invention also provides an bonding method for rib damping in the chest of a collision dummy, performed by a tooling fixture including any of the above-mentioned rib damping methods for a collision dummy; the method includes:

[0021] S1. Using the runway hole plane of the fixed rib clamp that fits with the rib as the reference plane, the two hole diameter axes after the through hole on the back of the rib is fixed as the reference axis, and the limiting block as the limiting reference of the rib damping strip, the fixed position of the rib is determined by mechanical connection with bolts through the runway hole.

[0022] S2. Clean the inner ring of the rib fixed on the tooling fixture to remove impurities and oil stains;

[0023] S3. Place the two damping strips in the straight limiting groove of the damping pre-compression mold. Control the lifting slide table with motor No. 2 to drive the power slide table to the low position. Start motor No. 1 so that the power slide table drives the damping pressure head to move axially along the threaded screw. After contacting the damping strip, pre-bend it. When the feedback value of the first pressure sensor reaches the preset pressure value, motor No. 1 rotates in the opposite direction to pre-bend the damping strip on the other side.

[0024] S4. Apply epoxy resin adhesive evenly to the inner ring of one side of the rib, then place the pre-bent damping strip on the rib support and use the limiting block for positioning.

[0025] S5. The lifting slide is controlled by the second motor to move the power slide to a high position. The first motor is started so that the power slide moves the damping pressure head along the screw axis to apply pressure evenly to the damping strip. When the feedback value of the second pressure sensor reaches the pre-pressure setting value, the first motor stops moving, so that the damping pressure head maintains the current position and the pressure is maintained for a preset time for drying. After the preset time, the first motor resets.

[0026] S6. After the adhesive on one side of the rib has dried and formed, perform steps S4-S5 on the other side of the rib.

[0027] Furthermore, the preset pressure value is set based on the bending strength limit of the damping material.

[0028] Furthermore, the preload setting value is determined based on the peak collision force under calibration test and the peak collision force under actual vehicle collision.

[0029] The embodiments of the present invention have the following technical effects:

[0030] Using a tooling fixture for bonding the damping of the ribs in the dummy's chest can improve the efficiency of the bonding tooling in the production of dummy chest ribs. By setting a first pressure sensor inside the damping pre-compression mold of the tooling fixture, the pressure applied during the bonding of the damping strip can be measured, and the mechanical stability of each rib can be controlled, thereby achieving high-precision, high-efficiency, and mass production. At the same time, a second pressure sensor is set outside the damping pressure head of the tooling fixture, which can control the pressure applied by the damping pressure head and avoid damage to the structure and viscoelastic properties of the damping. Attached Figure Description

[0031] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of one side of a tooling fixture for damping the ribs of a collision dummy, provided in an embodiment of the present invention.

[0033] Figure 2 This is a schematic diagram of the other side of a tooling fixture for damping the ribs of a collision dummy, provided in an embodiment of the present invention.

[0034] Figure 3 This is a flowchart of an adhesive bonding method for damping the ribs of a collision dummy, provided by an embodiment of the present invention.

[0035] In the picture:

[0036] 1. Support frame platform; 2. Fixed clamp base; 3. Pre-compression mold support; 4. Movable slide rail; 5. No. 2 motor; 6. Damping pressure head; 7. Lifting slide; 8. Limit block; 9. No. 1 motor; 10. Threaded screw; 11. Power slide; 12. Damping pre-compression mold; 13. First pressure sensor; 14. Second pressure sensor; 15. Fixed rib clamp; 16. Runway hole; 17. Sliding rib clamp; 18. Dovetail groove slide; 19. Rib support; 20. Movable slide; 21. Screw support; 22. Damping strip; 23. Rib. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0038] Figure 1 This is a schematic diagram of one side of a tooling fixture for damping the ribs of a collision dummy, provided in an embodiment of the present invention. Figure 2 This is a schematic diagram of the other side of a tooling fixture for damping the ribs of a collision dummy, provided in an embodiment of the present invention. See also... Figure 1 and Figure 2 The tooling fixture includes: a support assembly module; a lifting preload module, a positioning tooling module, and a power screw module fixed to the support assembly module.

[0039] The support assembly module includes a support frame platform 1, a fixed clamp base 2, a pre-compression mold support 3, and a movable slide rail 4 fixed on the support frame platform 1, which are used to support the fixed positioning tooling module, the lifting pre-compression module, and the power screw module.

[0040] The lifting pre-compression module includes a second motor 5, a damping pressure head 6, and a lifting slide 7. The damping pressure head 6 is driven by the second motor 5 to move up and down on the lifting slide 7, and is used to pre-compress and shape the damping strip 22 and apply pressure to bond it.

[0041] The positioning fixture module includes a limiting block 8, which is used to position and clamp the rib 23 and to position the pre-pressed arc-shaped damping strip 22.

[0042] The power screw module includes a first motor 9, a threaded screw 10, and a power slide 11. The first motor 9 drives the power slide 11 to perform axial linear motion through the threaded screw 10, which drives the damping pressure head 6 to work and achieve the pressure bonding of the damping strip 22.

[0043] Specifically, the supporting frame platform 1, the fixed fixture base 2, the pre-compression mold support 3, and the movable slide rail 4 are integrally machined to ensure the stability of the tooling fixture and to ensure the effective cooperation of each module.

[0044] The lifting pre-compression module 2 also includes: a damping pre-compression mold 12, a first pressure sensor 13, and a second pressure sensor 14. The damping pre-compression mold 12 is fixed on the pre-compression mold support 3, which is symmetrically arranged on both sides of the fixed clamp base 2. The lifting slide 7 is located at the center of the fixed clamp base 2, and the damping pressure head 6 is symmetrically arranged on both sides of the lifting slide 7, with the two symmetrical damping pressure heads 6 fixedly connected in the middle. The second motor 5 is located below the lifting slide 7 and is used to drive the lifting slide 7 to rise or fall. The first pressure sensor 13 is located inside the damping pre-compression mold 12 and is used to measure the applied pressure when pre-compressing and shaping the damping strip 22. The second pressure sensor 14 is located outside the damping pressure head 6 and is used to measure the applied pressure when applying pressure to bond the damping strip 22.

[0045] Specifically, the damping pressure head 6 of the lifting pre-compression module 2 can be raised and lowered on the lifting slide 7 under the drive of the second motor 5. When the damping pressure head 6 is in the low position, it cooperates with the damping pre-compression mold 12 to pre-compress and shape the damping strip 22, so that the straight damping strip 22 is pre-compressed into an arc shape to facilitate subsequent bonding work. When the damping pressure head 6 is in the high position, it cooperates with the fixed rib 23 to apply pressure and bond the damping strip 22. The first pressure sensor 13 set on the damping pre-compression mold 12 is used to control the pre-compression of the damping pressure head 6, and the second pressure sensor 14 set on the damping pressure head 6 is used to control the bonding pressure of the damping strip 22 to avoid damage to the damping strip 22 due to overpressure and to ensure the smooth progress of the bonding work.

[0046] The positioning fixture module 3 also includes: a fixed rib clamp 15, a raceway hole 16, a sliding rib clamp 17, a dovetail groove slide 18, and a rib support 19. The fixed rib clamp 15 is fixed on the fixed clamp base 2. The raceway hole 16 is provided at both ends of the fixed rib clamp 15 for fixing and supporting the rib 23. The dovetail groove slide 18 is provided on the fixed clamp base 2. The sliding rib clamp 17 is slidably connected to the fixed clamp base 2 through the dovetail groove slide 18 for adjusting the rib 23. The rib support 19 is symmetrically arranged on both sides of the fixed rib clamp 15. One end of the rib support 19 is fixedly connected to the fixed rib clamp 15 through the raceway hole 16 on the fixed rib clamp 15, and the other end is fixedly connected to the sliding rib clamp 17. The limiting block 8 is provided inside the sliding rib clamp 17 for positioning and clamping the rib 23 and for positioning the pre-pressed arc-shaped damping strip 22.

[0047] Specifically, the fixed rib clamp 15, sliding rib clamp 17, rib support 19, and limiting block 8 of the positioning fixture module 3 can effectively install and position the rib 23. The design of the dovetail groove slide 18 and the racetrack hole 16 makes this fixture fixture applicable to various sizes of dummy ribs, such as 50 and 95, including female and child dummies. Among them, the limiting block 8 is a two-way positioning device, which can both position and clamp the rib 23 and position the pre-pressed arc-shaped damping strip 22 to ensure the accuracy and stability of the bonding position of the damping strip 22, thereby ensuring the stability of the mechanical response of the rib.

[0048] The power screw module 4 also includes: a movable slide 20 and a screw support 21. The movable slide 20 is located on both sides of the support frame platform 1 and is mounted on the movable slide rail 4, sliding along the movable slide rail 4; the screw support 21 is fixed on the movable slide 20, and the two ends of the threaded screw 10 are respectively fixed on the two screw supports 21; the power slide 11 is mounted on the threaded screw 10 and slides left and right through the threaded screw 10; the first motor 9 is located outside the screw support 21 and connected to the threaded screw 10, used to drive the power slide 11 to perform axial linear motion through the threaded screw 10.

[0049] Specifically, the first motor 9 of the power screw module 4 can drive the power slide 11 to perform axial linear motion through the threaded screw 10, thereby driving the damping pressure head 6 of the lifting pre-pressure module 2 to also perform axial linear motion. Since the movable slide 20 is unpowered, it can slide on the movable slide rail 4. During the axial movement of the damping pressure head 6 to apply pressure to the damping strip 22, even if the damping pressure head 6 is not perfectly aligned with the center of symmetry of the rib 23, even if the position of the damping pressure head 6 is slightly to the left or right when it first contacts the damping strip 22, because the position of the rib 23 is fixed and the damping pressure head 6 is arc-shaped and symmetrical, the movable slide 20 will slide on the movable slide rail 4, causing the damping pressure head 6 to move and align with the center of symmetry of the rib 23. This results in a better fit between the damping pressure head 6, the damping strip 22, and the rib 23 during the pressure bonding process. In addition, the damping pressure head 6 can be aligned with the center of symmetry of the rib 23 by manually adjusting the movable slide 20 before applying pressure.

[0050] This invention provides an embodiment of the invention by setting a first pressure sensor inside the damping pre-compression mold of the tooling fixture, which can measure the applied pressure when the damping strip is pressed and bonded, control the mechanical stability of each rib, and thus achieve high-precision, high-efficiency, and mass production; at the same time, a second pressure sensor is set outside the damping pressure head of the tooling fixture, which can control the pressure applied by the damping pressure head and avoid damage to the structure and viscoelastic properties of the damping.

[0051] Figure 3 This is a flowchart illustrating an adhesive bonding method for damping the ribs of a collision dummy, provided in an embodiment of the present invention. See also... Figure 3 Specifically, it includes:

[0052] S1. Using the plane of the runway hole 17 of the fixed rib clamp 15 that fits with the rib 23 as the reference plane, the two hole diameter axes after the through hole on the back of the rib 23 is fixed as the reference axis, and the limiting block 8 as the limiting reference of the rib damping strip 22, the fixed position of the rib 23 is determined by mechanical connection with bolts through the runway hole 17.

[0053] Specifically, since different types of dummy ribs have different sizes, when it is necessary to adjust the fixed position of the dummy ribs, the horizontal displacement of the ribs 23 can be adjusted through the runway hole 17. For example, the allowable horizontal displacement of the ribs is 10mm, and the error of the horizontal displacement is between 0.05mm and 0.1mm.

[0054] S2. Clean the inner ring of the rib 23 fixed on the tooling fixture to remove impurities and oil stains.

[0055] Specifically, since the damping strip 22 needs to be bonded to the inner ring of the rib 23, the inner ring of the rib 23 needs to be cleaned to remove impurities and oil stains, so as to facilitate the bonding of the damping strip 22 and achieve a better fit between the damping strip 22 and the rib 23.

[0056] S3. Place the two damping strips 22 in the straight limiting groove of the damping pre-compression mold 12. Control the lifting slide 7 to drive the power slide 11 to the low position through the second motor 5. Start the first motor 9 so that the power slide 11 drives the damping pressure head 6 to move axially along the threaded screw 10. After contacting the damping strip 22, pre-bend it. When the feedback value of the first pressure sensor 13 reaches the preset pressure value, the first motor 9 rotates in the opposite direction to pre-bend the other damping strip 22.

[0057] Specifically, the preset pressure value is set according to the bending strength limit of the damping material. In order to prevent the damping strip from being crushed during the pre-compression process, the preset pressure value will also be different depending on the damping material.

[0058] S4. Apply epoxy resin adhesive evenly to the inner ring of one side of the rib 23, then place the pre-bent damping strip 22 on the rib support 19 and position it using the limiting block 8.

[0059] For example, the adhesive used in this embodiment is an epoxy resin adhesive, the viscosity of which is known. The formula for adhesive force is:

[0060]

[0061] Where F is the adhesive force. Where A is the viscosity of the adhesive and A is the area of ​​the bonding surface.

[0062] The formula for calculating the area of ​​the bonding surface is as follows:

[0063]

[0064] Where l and b are the length and width of the damping strip, respectively; and after measurement, l = 25.78 cm and b = 2 cm. Therefore, the calculation yields:

[0065] F = 275000 mPs × 51.56 cm 2 =1417900N=1417.9×10 3 KN

[0066] According to the formula for the peel strength of damping strips:

[0067]

[0068] The ultimate peel strength E of the damping strip when using this adhesive can be calculated. lim,Right now:

[0069]

[0070] S5. The lifting slide 7 is controlled by motor 5 to move the power slide 11 to a high position. Motor 9 is started, so that the power slide 11 drives the damping pressure head 6 to move axially along the threaded screw 10 to apply uniform pressure to the damping strip 22. When the feedback value of the second pressure sensor 14 reaches the pre-pressure setting value, motor 9 stops moving, so that the damping pressure head 6 maintains the current position and pressure for a preset time to air dry. After the preset time, motor 9 resets.

[0071] Specifically, the first motor 9 and the power slide 11 drive the damping pressure head 6 to move axially along the threaded screw 10. When the feedback value from the second pressure sensor 14 reaches the pre-pressure setting value, the first motor 9 stops moving, allowing the damping pressure head 6 to maintain its current position and pressure to continue applying uniform pressure to the damping strip 22. This pressure is maintained for a preset time to allow the damping strip 22 to air dry. After the damping strip 22 has finished air drying, the first motor 9 resets. Testing has shown that the preset drying time can be set to 10 minutes.

[0072] Furthermore, the preload setting value is determined based on the peak collision force under calibration test and the peak collision force under actual vehicle collision. For example, the peak collision force under calibration test and the peak collision force under actual vehicle collision can be obtained through measurement:

[0073] The peak impact force F1 under the calibration test was 857.62 N.

[0074] The peak impact force F2 under actual vehicle collision is 7869.5N.

[0075] Since F1 < F2, the limiting peak force is taken as: F max =7869.5N.

[0076] The ultimate peak force F max =7869.5N is used as the preload setting value to apply uniform pressure to the damping strip.

[0077] Furthermore, the peel strength of the damping strip under this impact force is calculated based on the ultimate peak force:

[0078]

[0079] The peel strength of the damping strip calculated based on the ultimate peak force is compared with the ultimate peel strength of the damping strip when using this adhesive. Since... This indicates that the peel strength of the damping strip meets the requirements when using this adhesive, and damping peeling will not occur during impact.

[0080] If E≥Elim If the result is negative, it indicates that the adhesive does not meet the requirements and needs to be replaced with another adhesive.

[0081] S6. After the adhesive on one side of the rib 23 has dried and formed, perform steps S4-S5 on the other side of the rib 23.

[0082] This invention employs a tooling fixture for bonding the damping of the ribs in the dummy's chest, which improves the efficiency of the bonding tooling in the production of dummy chest ribs. By setting a first pressure sensor inside the damping pre-compression mold of the tooling fixture, the applied pressure can be measured when the damping strip is bonded, thus controlling the mechanical stability of each rib and achieving high-precision, high-efficiency, and mass production. At the same time, a second pressure sensor is set outside the damping pressure head of the tooling fixture, which can control the pressure applied by the damping pressure head and avoid damage to the structure and viscoelastic properties of the damping.

[0083] It should be noted that the terminology used in this invention is for describing specific embodiments only and is not intended to limit the scope of this application. As shown in this specification, unless the context clearly indicates otherwise, words such as "a," "an," "an," and / or "the" do not specifically refer to the singular and may include the plural. The terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, or apparatus that includes said element.

[0084] It should also be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Unless otherwise expressly specified and limited, the terms "installed," "connected," "linked," etc., 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; they can refer to the internal communication of two components. For those skilled in the art, the specific meaning of the above terms in the present invention can be understood according to the specific circumstances.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the technical solutions of the embodiments of the present invention.

Claims

1. A tooling fixture for damping the ribs of a collision dummy's chest, characterized in that, include: Support assembly module; The lifting preload module, the positioning tooling module, and the power screw module are fixed to the support assembly module; The support assembly module includes a support frame platform (1), a fixed clamp base (2), a pre-compression mold support (3), and a movable slide rail (4) fixed on the support frame platform (1), which are used to support and fix the positioning tooling module, the lifting pre-compression module, and the power screw module. The lifting pre-compression module includes a second motor (5), a damping pressure head (6), and a lifting slide (7). The damping pressure head (6) is lifted and lowered in the lifting slide (7) under the drive of the second motor (5) to pre-compress and shape the damping strip (22) and apply pressure for bonding. The positioning tooling module includes a limiting block (8) for positioning and clamping the rib (23) and for positioning the pre-pressed arc-shaped damping strip (22); The power screw module includes a No. 1 motor (9), a threaded screw (10), and a power slide (11). The No. 1 motor (9) drives the power slide (11) to perform axial linear motion through the threaded screw (10), thereby driving the damping pressure head (6) to work and achieve pressure bonding of the damping strip (22). The lifting preload module further includes: a damping preload mold (12), a first pressure sensor (13), and a second pressure sensor (14). The damping pre-compression mold (12) is fixed on the pre-compression mold support (3), and the pre-compression mold support (3) is symmetrically arranged on the left and right sides with the fixed clamp base (2) as the center; the lifting slide (7) is arranged at the center position on the fixed clamp base (2), and the damping pressure head (6) is symmetrically arranged on the left and right sides with the lifting slide (7) as the center, and the two symmetrical damping pressure heads (6) are fixedly connected in the middle; the second motor (5) is arranged below the lifting slide (7) and is used to drive the damping pressure head (6) to rise or fall; the first pressure sensor (13) is arranged inside the damping pre-compression mold (12) and is used to measure the applied pressure when the damping strip (22) is pre-compressed and shaped; the second pressure sensor (14) is arranged outside the damping pressure head (6) and is used to measure the applied pressure when the damping strip (22) is pressure bonded; The positioning fixture module also includes: a fixed rib clamp (15), a runway hole (16), a sliding rib clamp (17), a dovetail groove slide (18), and a rib support (19). The fixed rib clamp (15) is fixed on the fixed clamp base (2), and the runway hole (16) is provided at both ends of the fixed rib clamp (15) for fixing and supporting the rib (23); the dovetail groove slide (18) is opened on the fixed clamp base (2), and the sliding rib clamp (17) is slidably connected to the fixed clamp base (2) through the dovetail groove slide (18) for adjusting the rib (23); the rib support (19) Symmetrically arranged on both sides of the fixed rib clamp (15), one end of the rib support (19) is fixedly connected to the fixed rib clamp (15) through the runway hole (16) on the fixed rib clamp (15), and the other end is fixedly connected to the sliding rib clamp (17); the limiting block (8) is arranged inside the sliding rib clamp (17) for positioning and clamping the rib (23) and positioning the pre-pressed arc-shaped damping strip (22).

2. The tooling fixture for damping the ribs of a collision dummy according to claim 1, characterized in that, The supporting frame platform (1), the fixed clamp base (2), the pre-compression mold support (3), and the movable slide rail (4) are integrally formed.

3. A tooling fixture for damping the ribs of a collision dummy's chest according to claim 1, characterized in that, The power screw module also includes: a movable slide (20) and a screw support (21); The movable slide (20) is located on both sides of the support frame platform (1) and is mounted on the movable slide rail (4), sliding along the movable slide rail (4); the lead screw support (21) is fixed on the movable slide (20), and the two ends of the threaded lead screw (10) are respectively fixed on the lead screw support (21) on both sides; the power slide (11) is mounted on the threaded lead screw (10) and slides left and right through the threaded lead screw (10); the first motor (9) is mounted on the outside of the lead screw support (21) and connected to the threaded lead screw (10), and is used to drive the power slide (11) to perform axial linear motion through the threaded lead screw (10).

4. A bonding method for damping the ribs of a collision dummy's chest, performed by a tooling fixture for damping the ribs of a collision dummy's chest as described in any one of claims 1-3, characterized in that, The methods include: S1. Using the plane of the runway hole (17) of the fixed rib clamp (15) that fits with the rib (23) as the reference plane, the two hole diameter axes after the through hole on the back of the rib (23) is fixed as the reference axis, and the limiting block (8) as the limiting reference of the rib damping strip (22), the fixed position of the rib (23) is determined by mechanical connection with bolts through the runway hole (17); S2. Clean the inner ring of the rib (23) fixed on the tooling fixture to remove impurities and oil stains; S3. Place the two damping strips (22) in the straight limiting groove of the damping pre-compression mold (12). Control the damping pressure head (6) to drive the power slide (11) to a low position through the second motor (5). Start the first motor (9) so that the power slide (11) drives the damping pressure head (6) to move axially along the threaded screw (10). After contacting the damping strip (22), pre-bend it. When the feedback value of the first pressure sensor (13) reaches the preset pressure value, the first motor (9) rotates in the opposite direction to pre-bend the damping strip (22) on the other side. S4. Apply epoxy resin adhesive evenly to the inner ring of one side of the rib (23), and then place the pre-bent damping strip (22) on the rib support (19) and position it using the limiting block (8). S5. The damping pressure head (6) is controlled by the second motor (5) to drive the power slide (11) to a high position. The first motor (9) is started, so that the power slide (11) drives the damping pressure head (6) to move axially along the threaded screw (10) to apply pressure evenly to the damping strip (22). When the feedback value of the second pressure sensor (14) reaches the pre-pressure setting value, the first motor (9) stops moving, so that the damping pressure head (6) maintains its current position and pressure for a preset time to air dry. After the preset time, the first motor (9) resets. S6. After the adhesive on one side of the rib (23) has dried and formed, steps S4-S5 are performed on the other side of the rib (23).

5. The bonding method for damping the ribs of a collision dummy according to claim 4, characterized in that, In step S3, the preset pressure value is set based on the bending strength limit of the damping material.

6. The bonding method for damping the ribs of a collision dummy according to claim 4, characterized in that, In step S5, the preload setting value is determined based on the peak collision force under calibration test and the peak collision force under actual vehicle collision.

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