Friction sound testing system for automotive trim material

Abstract

The invention relates to the technical field of friction noise detection, in particular to an automotive trim material friction sound testing system which comprises a first sample clamp, a second sample clamp, a lifting assembly, a reciprocating driving part and a data processing assembly. Specifically, the first sample clamp is used for installing a to-be-tested piece; the second sample clamp is used for mounting a friction piece; the lifting assembly is connected with the first sample clamp and used for driving the first sample clamp to approach the second sample clamp; the reciprocating driving part is connected with the second sample clamp and is used for driving the second sample clamp to linearly slide back and forth along one surface which is parallel to the first sample clamp and is used for mounting the to-be-tested part according to preset speed and frequency; the data processing assembly is used for collecting noise values generated when the to-be-tested piece and the friction piece abut against each other and rub each other at different pressures, friction frequencies and friction speeds. The applicability of the automobile interior material friction sound testing system can be improved, and the diversity and accuracy of detection results can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of friction noise detection, in particular to a friction sound test system for automotive interior materials. BACKGROUND

[0002] The quietness of automotive interior materials is the user's intuitive perception of the "high-grade" and "work quality" of the vehicle. When the vehicle is driving or the user is operating, the interior materials (such as plastic parts and fabrics, fabrics and fabrics, leather and fabrics, leather and plastic parts, etc.) produce "click" and "Squeak" noises due to friction, which directly affects the driving experience. Therefore, at the material selection stage, simulate the working conditions in the actual use process, find out the potential abnormal noise risk in advance, select the materials that meet the requirements, and completely solve the friction abnormal noise caused by improper material selection. It is an important voice of the vehicle enterprise.

[0003] Currently, there is no uniform equipment and standard to evaluate the friction abnormal noise of interior materials. According to the mechanism analysis of friction abnormal noise, the test of leather material currently adopts VDA230-206:2005 standard, and uses the stick-slip risk coefficient (RPN) to evaluate the risk level of abnormal noise generated by the material in the actual use process. The standard divides the RPN value into 10 levels, 1~3 is acceptable, 4~6 is risky, and 7~10 is unacceptable. The equipment is designed and produced by Germany ZIEGLER. The main research object of this standard and index is leather, which is not applicable to fabrics, plastic parts, etc. Moreover, the standard indirectly evaluates the risk of abnormal noise, which still has certain gap with the actual use conditions.

[0004] In view of the above problems, some institutions in the industry have made certain research, but their research scope is relatively wide, mainly aiming at the overall noise in the vehicle, without aiming at the interior materials, without direct index representation, and without wide application in the market. SUMMARY

[0005] In order to improve the applicability of the friction sound test system for automotive interior materials and improve the diversity and accuracy of the detection results, the present application provides a friction sound test system for automotive interior materials.

[0006] The friction sound test system for automotive interior materials provided by the present application adopts the following technical scheme: A friction sound test system for automotive interior materials, comprising: A first sample clamp for installing a test piece; A second sample clamp movably arranged opposite to the first sample clamp for installing a friction piece; The lifting assembly is connected with the first sample clamp and used to drive the first sample clamp to approach the second sample clamp so that the to-be-tested member applies a preset pressure to the friction member; The reciprocating driving member is connected with the second sample clamp and used to drive the second sample clamp to relatively reciprocate at a preset friction speed and frequency along a surface of the first sample clamp for mounting the to-be-tested member, so that the to-be-tested member and the friction member generate relative friction after abutting. The data processing assembly is used to collect noise values generated by the abutting friction between the to-be-tested member and the friction member under different pressures, friction frequencies and friction speeds. The isolation assembly is used to isolate the first sample clamp, the second sample clamp, the lifting assembly and the reciprocating driving member from the outside world, and isolate the reciprocating driving member from the first sample clamp, the second sample clamp and the lifting assembly.

[0007] By adopting the above technical scheme, the applicability of the automobile interior material friction sound test system is improved, and the diversity and accuracy of the detection results are improved. Specifically, when the automobile interior material friction test is needed, the to-be-tested member and the friction member are installed in the first sample clamp and the second sample clamp respectively, and the first sample clamp and the second sample clamp provide stable mounting carriers for the to-be-tested member and the friction member, facilitating the friction test of the two. Then, the lifting assembly is operated to drive the first sample clamp to approach the second sample clamp, so that the to-be-tested member applies a predetermined pressure to the friction member to simulate the actual use condition. Then, the reciprocating driving member is controlled to output at a predetermined displacement speed and reciprocating displacement frequency, thereby driving the second sample clamp to reciprocate relative to the first sample clamp, so that the to-be-tested member and the friction member generate friction to simulate the actual friction process. Finally, the data processing assembly collects noise values generated by the abutting friction between the to-be-tested member and the friction member under the pressure, friction frequency and friction speed, and then directly obtains real and accurate noise data by simulating the actual use environment. The isolation assembly not only can greatly reduce the interference of external environmental noise on the collection of noise values generated by the abutting friction between the to-be-tested member and the friction member, but also can improve the accuracy of noise value collection. At the same time, it can also greatly reduce the influence of noise generated by the reciprocating driving member itself on the test values mixed in the noise generated by the friction between the to-be-tested member and the friction member, and further improve the accuracy of the detection results. Moreover, the whole system can be applied to the friction test between various materials, and has a wide range of applications.

[0008] Optionally, the isolation assembly comprises a soundproof room and a soundproof cover; the reciprocating driving member is arranged in the soundproof cover, and the soundproof cover, the first sample clamp, the second sample clamp, the lifting assembly and the reciprocating driving member are arranged in the soundproof room.

[0009] By adopting the technical scheme, the outside environment noise can be effectively isolated in the soundproof room to interfere with the test process, a relatively quiet environment is provided for the test, and the accuracy of the test result is ensured. The soundproof cover can further isolate the noise generated by the reciprocating driving part during its own operation, improve the accuracy of the noise value collection, and make the detection result more truly reflect the actual friction noise size of the interior material.

[0010] Optionally, the transmission member is further connected between the reciprocating driving part and the second sample clamp; one end of the transmission member is connected to the output end of the reciprocating driving part, and the other end of the transmission member penetrates through the soundproof cover and is connected to the second sample clamp.

[0011] By adopting the technical scheme, the transmission member realizes the connection between the reciprocating driving part and the second sample clamp, so that the driving force of the reciprocating driving part can be effectively transmitted to the second sample clamp. Even if the reciprocating driving part is isolated by the soundproof cover, the second sample clamp can also be driven by the transmission member to slide linearly along the side of the first sample clamp for installing the to-be-tested part, so that the to-be-tested part and the friction part abut to generate relative friction.

[0012] Optionally, the transmission member includes a support frame, a spring, a first transmission rod, a second transmission rod, and a magnetic linkage; the support frame is fixedly arranged, the first transmission rod is movably connected to the support frame through the spring, one end of the spring is connected to the outer wall of the first transmission rod, the other end of the spring is connected to the support frame, and the second sample clamp is connected to the first transmission rod; the second transmission rod is connected to the reciprocating driving part, the reciprocating driving part can drive the second transmission rod to slide linearly along the side of the first sample clamp for installing the to-be-tested part; and the first transmission rod and the second transmission rod are non-contact transmission connected through the magnetic linkage, so that the second transmission rod drives the first transmission rod and the second sample clamp to slide synchronously when the second transmission rod slides.

[0013] By adopting the technical scheme, when the reciprocating driving part drives the second transmission rod to slide reciprocally, the first transmission rod can slide together through the magnetic linkage, and the second sample clamp slides together through the first transmission rod, so that the reciprocating driving part drives the second sample clamp to slide linearly along the side of the first sample clamp for installing the to-be-tested part. The design of the magnetic linkage makes the second transmission rod and the first transmission rod non-contact connected, prevents the noise generated by the reciprocating driving part from being transmitted to the first transmission rod through the second transmission rod, avoids the generation of the sound bridge, and further improves the accuracy of the test result. The spring can provide support and guide for the sliding of the first transmission rod by using its own characteristics, so that the first transmission rod does not generate relative friction with other parts during the sliding process, further reduces the generation of noise, and improves the accuracy of the test result.

[0014] Optionally, the magnetic linkage comprises a first magnetic member, a second magnetic member and a third magnetic member; the first magnetic member is fixedly connected to the first transmission rod, the second magnetic member is fixedly connected to the second transmission rod, and the second magnetic member is oppositely arranged with the first magnetic member; the first magnetic member and the second magnetic member repel each other, and the repulsive force generated between the first magnetic member and the second magnetic member is parallel to the output direction of the reciprocating driving member; the third magnetic member is fixedly connected to the second transmission rod, and the third magnetic member is located on the side of the first magnetic member away from the second magnetic member; the third magnetic member and the first magnetic member repel each other, and the repulsive force generated between the third magnetic member and the first magnetic member is parallel to the output direction of the reciprocating driving member; the magnitude of the repulsive force between the first magnetic member and the second magnetic member is equal to the magnitude of the repulsive force between the third magnetic member and the first magnetic member.

[0015] By adopting the above technical scheme, the non-contact transmission connection of the first transmission rod and the second transmission rod is realized. This non-contact transmission avoids the mechanical wear and vibration that may be generated by the traditional contact transmission, reduces the additional noise generated by the contact of the transmission components, improves the stability and reliability of the transmission, and effectively reduces the energy loss in the transmission process while ensuring the transmission effect, so that the second transmission rod can more accurately and stably drive the first transmission rod and the second sample clamp to slide synchronously when sliding, thereby ensuring that the relative friction process between the to-be-tested member and the friction member is more stable and accurate, which helps the data processing assembly to collect more accurate noise values generated when the to-be-tested member and the friction member are abutted and rubbed under different pressures, friction frequencies and friction speeds.

[0016] Optionally, the lifting assembly comprises a mounting seat, a lifting seat, a lead screw and a pressure sensor; the mounting seat is fixedly arranged relative to the reciprocating driving member; the lifting seat is in sliding connection with the mounting seat, and the sliding direction of the lifting seat intersects with the side of the first sample clamp for mounting the to-be-tested member; the lead screw is in rotational connection with the mounting seat, and the lead screw is in threaded connection with the lifting seat, and the rotational axis of the lead screw is parallel to the sliding direction of the lifting seat; the first sample clamp is in movable connection with the lifting seat, and the pressure sensor is arranged between the first sample clamp and the lifting seat.

[0017] By adopting the technical scheme, the rotating screw can control the sliding of the lifting seat to drive the first sample clamp to accurately move towards or away from the second sample clamp, so that the to-be-tested member can accurately abut against the friction member with a preset pressure. The pressure sensor can monitor and feedback the pressure applied by the to-be-tested member on the friction member in real time, so as to accurately control and adjust the pressure, thereby testing the friction condition of the to-be-tested member and the friction member under different pressure conditions, improving the applicability of the test system and the accuracy of the detection result. Moreover, the friction force between the to-be-tested member and the friction member can be calculated by the pressure applied by the to-be-tested member on the friction member by using the calculation formula, so that the test data is more comprehensive.

[0018] Optionally, the data processing assembly comprises a first noise detector and a control host; the first noise detector is arranged beside the first sample clamp or the second sample clamp and is used for detecting the noise value generated when the to-be-tested member abuts against the friction member; the control host is electrically connected with the first noise detector, the reciprocating driving member and the pressure sensor, and is used for controlling the movement speed and frequency of the reciprocating driving member and collecting the noise value generated when the to-be-tested member abuts against the friction member under different pressures, friction frequencies and friction speeds.

[0019] By adopting the technical scheme, the first noise detector can accurately detect the noise value generated when the to-be-tested member abuts against the friction member; the control host can accurately control the movement speed and frequency of the reciprocating driving member, so as to comprehensively collect the noise value generated when the to-be-tested member abuts against the friction member under different pressures, friction frequencies and friction speeds, thereby providing a richer and more accurate data basis for the test, improving the applicability of the test system and the accuracy of the detection result.

[0020] Optionally, the data processing assembly further comprises an image information collector and a second noise detector which are electrically connected with the control host; the image information collector is used for collecting image information at the first sample clamp and the second sample clamp and transmitting the image information to the control host for display; the second noise detector is used for detecting environmental noise and sending a warning signal to the control host when the environmental noise exceeds a set value.

[0021] By adopting the technical scheme, the image information collector can collect image information at the first sample clamp and the second sample clamp and transmit the image information to the control host computer for display, so that an operator can intuitively observe the state of the test piece and the friction piece, such as the position and the wear condition, and help to monitor and analyze the test process in real time and discover abnormal conditions in time. The second noise detector can detect environmental noise and send a warning signal to the control host computer when the environmental noise exceeds a set value, so that the test result is not disturbed by the environmental noise, the noise value generated when the test piece and the friction piece abut and rub is accurate and reliable, and the accuracy of the detection result and the reliability of the test system are improved.

[0022] Optionally, the system further comprises a damping table, and the lifting assembly and the reciprocating driving member are mounted on the damping table.

[0023] By adopting the technical scheme, the damping table can effectively reduce the influence of the vibration generated when the lifting assembly and the reciprocating driving member operate on the test system, avoid the vibration from causing the contact state of the test piece and the friction piece to be unstable, improve the stability and accuracy of the relative friction between the test piece and the friction piece, and further improve the accuracy of the noise value collection under different pressures, friction frequencies, and friction speeds, so that the detection result is more reliable.

[0024] To sum up, the application has the following beneficial technical effects: 1. The applicability of the automobile interior material friction sound test system is improved, and the diversity and accuracy of the detection result are improved. Specifically, when the automobile interior material friction test is needed, the test piece and the friction piece are mounted on the first sample clamp and the second sample clamp respectively, and the first sample clamp and the second sample clamp provide stable mounting carriers for the test piece and the friction piece respectively, so that the two can be tested for friction. Then, the lifting assembly is operated to drive the first sample clamp to approach the second sample clamp, so that the test piece applies a predetermined pressure to the friction piece to simulate the actual use condition. Then, the reciprocating driving member is controlled to output at a predetermined displacement speed and reciprocating displacement frequency, so as to drive the second sample clamp to reciprocate relative to the first sample clamp, so that the test piece and the friction piece generate friction to simulate the actual friction process. Finally, the data processing assembly collects the noise value generated when the test piece and the friction piece abut and rub under the pressure, friction frequency, and friction speed, and then directly obtains the real and accurate noise data by simulating the actual use environment. The isolation assembly can not only greatly reduce the interference of the external environmental noise on the collection of the noise value generated when the test piece and the friction piece abut and rub, but also improve the accuracy of the noise value collection. Meanwhile, the noise generated when the reciprocating driving member operates can be greatly reduced to mix into the noise generated when the test piece and the friction piece rub, so as to further improve the accuracy of the detection result. Moreover, the whole system can be applied to the friction test between various materials, and has a wide range of applications. 2. When the reciprocating drive component drives the second transmission rod to slide back and forth, it can drive the first transmission rod to slide together via a magnetic linkage. The first transmission rod, in turn, drives the second sample fixture to slide together, thus realizing the reciprocating drive component driving the second sample fixture to slide linearly back and forth along the side of the first sample fixture parallel to the surface used to mount the test piece. The design of the magnetic linkage ensures that the second transmission rod and the first transmission rod are connected without contact, preventing noise from the reciprocating drive component from being transmitted to the first transmission rod through the second transmission rod, avoiding the generation of sound bridges, and further improving the accuracy of the test results. The spring, with its own characteristics, can provide support and guidance for the sliding of the first transmission rod, ensuring that the first transmission rod does not generate relative friction with other components during the sliding process, further reducing noise generation and improving the accuracy of the test results. 3. A non-contact transmission connection between the first and second transmission rods was achieved. This non-contact transmission avoids the mechanical wear and vibration that may occur with traditional contact transmission, reduces additional noise caused by contact between transmission components, and improves the stability and reliability of the transmission. Moreover, while ensuring the transmission effect, it can effectively reduce energy loss during the transmission process, allowing the second transmission rod to slide more precisely and stably, driving the first transmission rod and the second sample fixture to slide synchronously. This ensures a more stable and accurate relative friction process between the test piece and the friction component, helping the data processing component to collect more accurate noise values ​​generated during the contact friction between the test piece and the friction component under different pressures, friction frequencies, and friction speeds. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application.

[0026] Figure 2 This mainly showcases the lifting assembly and reciprocating drive component in Embodiment 1 of this application.

[0027] Figure 3 yes Figure 2 A magnified view of part A in the middle.

[0028] Figure 4 This is a schematic diagram of the overall structure of Embodiment 2 of this application.

[0029] Figure 5 This mainly demonstrates the transmission component in Embodiment 2 of this application.

[0030] The reference signs are explained as follows: 100, a to-be-tested piece; 200, a friction piece; 1, a first sample clamp; 2, a second sample clamp; 3, a lifting assembly; 31, a mounting seat; 32, a lifting seat; 33, a lead screw; 34, a pressure sensor; 4, a reciprocating driving piece; 41, a support; 42, a sliding seat; 43, a reciprocating lead screw; 44, a servo motor; 5, a data processing assembly; 51, a first noise detector; 52, a second noise detector; 53, an image information collector; 54, a control host; 6, an isolation assembly; 61, a soundproof room; 62, a soundproof cover; 7, a transmission piece; 71, a support frame; 72, a spring; 73, a first transmission rod; 74, a second transmission rod; 75, a magnetic linkage; 751, a first magnetic piece; 752, a second magnetic piece; 753, a third magnetic piece; 8, a damping table. DETAILED DESCRIPTION

[0031] The following Figures 1-5 The application is further described in detail.

[0032] The application discloses a friction sound test system for automotive interior materials. Embodiment 1

[0033] Reference Figure 1 and Figure 2 In the embodiment, the friction sound test system for automotive interior materials comprises a first sample clamp 1, a second sample clamp 2, a lifting assembly 3, a reciprocating driving piece 4, a data processing assembly 5, an isolation assembly 6, a transmission piece 7, and a damping table 8.

[0034] Specifically, the first sample clamp 1 is a high-strength steel plate with a width of 30 mm, a length of 50 mm, and a smooth and flat surface, and is used for mounting the to-be-tested piece 100; the top surface of the first sample clamp 1 is a to-be-tested piece mounting surface, and the top surface of the first sample clamp 1 is parallel to the horizontal plane.

[0035] The second sample clamp 2 is a high-strength steel plate with a width of 85 mm, a length of 105 mm, and a smooth and flat surface, and is used for mounting the friction piece 200; the second sample clamp 2 is located above the first sample clamp 1, and the second sample clamp 2 and the first sample clamp 1 are movably arranged in opposite directions; one side of the second sample clamp 2 close to the top surface of the first sample clamp 1 is a friction piece mounting surface. The friction piece mounting surface of the second sample clamp 2 can be a plane or an arc surface, which can be selected according to the hardness of the sample material. For example, when the sample is a soft material, the second sample clamp 2 with an arc surface can be selected, and when the sample is a hard material, the second sample clamp 2 with a plane surface can be selected.

[0036] The lifting assembly 3 is fixedly installed, the lifting assembly 3 is connected with the first sample clamp 1, and is used for driving the first sample clamp 1 to be close to the second sample clamp 2, so that the to-be-tested piece 100 is abutted against the friction piece 200 to apply a preset pressure.

[0037] The reciprocating driving piece 4 is also fixedly installed, the reciprocating driving piece 4 is connected with the second sample clamp 2, and is used for driving the second sample clamp 2 to linearly reciprocate along a side of the first sample clamp 1 for installing the to-be-tested piece 100, so that the to-be-tested piece 100 is abutted against the friction piece 200 to generate relative friction.

[0038] The data processing assembly 5 is used for collecting noise values generated when the to-be-tested piece 100 is abutted against the friction piece 200 under different pressures, friction frequencies and friction speeds.

[0039] The isolation assembly 6 is used for isolating the first sample clamp 1, the second sample clamp 2, the lifting assembly 3 and the reciprocating driving piece 4 from the outside world, and isolating the reciprocating driving piece 4 from the first sample clamp 1, the second sample clamp 2 and the lifting assembly 3.

[0040] In this way, the applicability of the automobile interior material friction sound test system is improved, and the diversity and accuracy of the detection results are improved. Specifically, when the automobile interior material friction test is needed, a to-be-tested piece 100 with a width of 30 mm and a length of 50 mm and a friction piece 200 with a width of 70 mm and a length of 80 mm are cut out, and nano double-sided adhesive tape is pasted on the back of the to-be-tested piece 100 and the friction piece 200. The to-be-tested piece 100 is pasted on the first sample clamp 1 by using the nano double-sided adhesive tape, and the friction piece 200 is pasted on the second sample clamp 2. Then, the lifting assembly 3 is operated to drive the first sample clamp 1 to be close to the second sample clamp 2, so that the to-be-tested piece 100 is abutted against the friction piece 200 to apply a predetermined pressure, simulating the actual use condition. Then, the reciprocating driving piece 4 is controlled to output at a predetermined displacement speed and reciprocating displacement frequency, so as to drive the second sample clamp 2 to reciprocate relative to the first sample clamp 1, so that the to-be-tested piece 100 is rubbed with the friction piece 200, simulating the actual friction process. Finally, the data processing assembly 5 collects the noise values generated when the to-be-tested piece 100 is abutted against the friction piece 200 under the pressure, friction frequency and friction speed, and then directly obtains the real and accurate noise data by simulating the actual use environment. The isolation assembly 6 can not only greatly reduce the interference of external environmental noise on the noise value collection when the to-be-tested piece 100 is abutted against the friction piece 200, but also improve the accuracy of noise value collection. At the same time, it can also greatly reduce the noise generated by the reciprocating driving piece 4 itself and mixed into the noise generated by the to-be-tested piece 100 and the friction piece 200, and further improve the accuracy of the detection results. Moreover, the whole system can be applied to the friction test between various materials, and has a wide range of applications.

[0041] In other embodiments, the installation positions of the test piece 100 and the friction piece 200 can be interchanged, the test piece 100 is installed on the second sample clamp 2, and the friction piece 200 is installed on the first sample clamp 1, so that the test piece 100 reciprocatingly moves the friction piece 200.

[0042] Referring to Figure 1 and Figure 2 In the present embodiment, the isolation assembly 6 comprises a soundproof room 61 and a soundproof cover 62, the soundproof cover 62, the first sample clamp 1, the second sample clamp 2, the lifting assembly 3 and the reciprocating driving piece 4 are all installed in the soundproof room 61, and the reciprocating driving piece 4 is installed in the soundproof cover 62.

[0043] The soundproof cover 62 is made of a 2mm-thick steel plate, and a damping coating is sprayed on the inner wall of the soundproof cover 62, which can prevent the anastomosis effect and low-frequency resonance of the steel plate, and improve the noise reduction effect. A layer of sound-absorbing material is also laid on the damping coating, so that the soundproof cover 62 can effectively block the transmission of the operating noise of the reciprocating driving piece 4 to the outside. A soundproof cover door is also installed on the soundproof cover 62 to facilitate the maintenance and repair of the reciprocating driving piece 4 inside the soundproof cover 62. The gap between the soundproof cover 62 and the soundproof cover door is filled with sealing material to ensure the airtightness of the soundproof cover 62.

[0044] The soundproof room 61 is built with soundproofing materials such as sound-absorbing cotton and soundproof boards. The sound-absorbing cotton has good sound-absorbing performance and can absorb part of the noise generated in the test process. The soundproof board can effectively block the propagation of noise and form a relatively quiet test environment. The soundproof room 61 can adopt a multi-layer structure, for example, multiple soundproof boards are arranged, and sound-absorbing cotton is arranged between adjacent soundproof boards to improve the soundproof effect. A soundproof room door is installed on the side wall of the soundproof room 61 to facilitate personnel to enter and exit the soundproof room 61.

[0045] In this way, the soundproof room 61 can effectively isolate the external environmental noise from interfering with the test process, providing a relatively quiet environment for the test and improving the accuracy of noise value collection. The soundproof cover 62 can further isolate the noise generated by the reciprocating driving piece 4 itself during operation, improve the accuracy of noise value collection, and make the detection result more truly reflect the actual friction noise of the interior trim material.

[0046] Referring to Figure 1 and Figure 2In the embodiment, the damping table 8 is installed in the soundproof room 61, and the lifting assembly 3 and the reciprocating driving member 4 are both fixedly installed on the damping table 8. The damping table 8 adopts an aluminum table with a honeycomb structure, and the inner interlayer of the table adopts a honeycomb structure, which has the characteristics of large density and good stability, can effectively absorb the vibration generated when the lifting assembly 3 and the reciprocating driving member 4 operate, and avoid the unstable contact state of the test piece 100 and the friction piece 200 caused by the vibration. Thus, the stability and accuracy of the relative friction between the test piece 100 and the friction piece 200 are improved, and the test precision is effectively ensured.

[0047] With reference to Figure 2 and Figure 3 In the embodiment, the lifting assembly 3 includes a mounting seat 31, a lifting seat 32, a lead screw 33, and a pressure sensor 34. The mounting seat 31 is fixedly installed on the damping table 8, and the lifting seat 32 is slidingly connected to the mounting seat 31. The sliding direction of the lifting seat 32 is perpendicular to the horizontal plane. The lead screw 33 is rotatably installed on the mounting seat 31 through a bearing, and is threadedly connected to the lifting seat 32. The rotation axis of the lead screw 33 is parallel to the sliding direction of the lifting seat 32. The first sample clamp 1 is movably connected to the lifting seat 32. The pressure sensor 34 is connected between the first sample clamp 1 and the lifting seat 32, so that the three components form a structure similar to an electronic scale.

[0048] In this way, rotating the lead screw 33 can control the lifting seat 32 to slide, so as to drive the first sample clamp 1 to accurately move towards or away from the second sample clamp 2, and then the test piece 100 can accurately abut against the friction piece 200 with a preset pressure. The pressure sensor 34 can monitor and feedback the pressure applied by the test piece 100 on the friction piece 200 in real time, so as to facilitate accurate control and adjustment of the pressure, thereby testing the friction condition of the test piece 100 and the friction piece 200 under different pressure conditions, improving the applicability of the test system and the accuracy of the test results. Moreover, the friction force between the test piece 100 and the friction piece 200 can be calculated by the pressure applied by the test piece 100 on the friction piece 200 by using a calculation formula, so as to make the test data more comprehensive.

[0049] With reference to Figure 1 and Figure 2 In the embodiment, the reciprocating driving member 4 is connected to the second sample clamp 2 through a transmission member 7. One end of the transmission member 7 is connected to the output end of the reciprocating driving member 4, and the other end of the transmission member 7 extends out of the soundproof cover 62 through a sound-absorbing channel formed in the soundproof cover 62 to connect the second sample clamp 2.

[0050] Specifically, the reciprocating driving member 4 comprises a support 41, a sliding base 42, a reciprocating screw rod 43 and a servo motor 44. The support 41 is fixedly installed on the damping table 8, the sliding base 42 is slidingly connected to the support 41, and the sliding direction of the sliding base 42 is parallel to the horizontal plane. The reciprocating screw rod 43 is rotatably connected to the support 41 through a bearing, and the reciprocating screw rod 43 is threadedly connected to the sliding base 42, and the rotation axis of the reciprocating screw rod 43 is parallel to the sliding direction of the sliding base 42; the servo motor 44 is installed on the support 41 for driving the reciprocating screw rod 43 to rotate. The transmission member 7 is a metal rod-shaped member, one end of the transmission member 7 is fixedly connected to the sliding base 42, and the other end penetrates through the sound insulation passage formed in the sound insulation cover 62 and is detachably connected to the second sample clamp 2 through a bolt.

[0051] In other embodiments, the reciprocating driving member 4 can also use a pneumatic push rod, an electric push rod or a reciprocating mechanism commonly used in the mechanical field instead.

[0052] In this way, the transmission member 7 realizes the connection between the reciprocating driving member 4 and the second sample clamp 2, so that the driving force of the reciprocating driving member 4 can be effectively transmitted to the second sample clamp 2. Even if the reciprocating driving member 4 is isolated by the sound insulation cover 62, the second sample clamp 2 can also be driven by the transmission member 7 to linearly reciprocate along the side of the first sample clamp 1 for installing the to-be-tested member 100, so that the to-be-tested member 100 and the friction member 200 are in abutment to produce relative friction. Moreover, the detachable design of the transmission member 7 and the second sample clamp 2 enables the second sample clamp 2 to be quickly detached from the transmission member 7 when it is necessary to adjust the friction angle of the friction member 200, so as to facilitate the replacement of different models of the second sample clamp 2. For example, when it is necessary to make the friction member 200 and the to-be-tested member 100 form a 45° angle for friction, the bolt is loosened, the original second sample clamp 2 is detached, a second sample clamp 2 with a friction member installation surface inclined at 45° is replaced, and then the bolt is tightened to be fixed on the transmission member 7.

[0053] Referring to Figure 1 and Figure 2 In the present embodiment, the data processing assembly 5 comprises a first noise detector 51, a second noise detector 52, an image information collector 53 and a control host 54.

[0054] The control host 54 is electrically connected with the first noise detector 51, the second noise detector 52, the image collector, the servo motor 44 of the reciprocating driving member 4 and the pressure sensor 34.

[0055] The first noise detector 51 is a high-sensitivity sound recognition microphone, which is installed on the damping table 8 and located beside the first sample clamp 1, and is used for detecting the noise value generated when the to-be-tested member 100 and the friction member 200 are in abutment and friction.

[0056] The second noise detector 52 is also a high-sensitivity sound detection microphone, which is installed on the damping platform 8 and beside the end of the transmission member 7 penetrating through the soundproof cover 62, and is used to detect the ambient noise and send a warning signal to the control host 54 when the ambient noise exceeds the set value.

[0057] The image information collector 53 is a high-definition camera, which is installed on the damping platform 8 and beside the first sample clamp 1, and is used to collect the image information at the first sample clamp 1 and the second sample clamp 2 and transmit to the control host 54 for display.

[0058] The control host 54 is specifically a computer with display function, which is internally installed with control software, data calculation software and programming software, and can control the movement speed and frequency of the reciprocating driving member 4 and collect the noise value generated when the test piece 100 and the friction piece 200 are abutted and rubbed under different pressures, friction frequencies and friction speeds.

[0059] In this way, the first noise detector 51 can accurately detect the noise value generated when the test piece 100 and the friction piece 200 are abutted and rubbed; the control host 54 can accurately control the movement speed and frequency of the reciprocating driving member 4 to comprehensively collect the noise value generated when the test piece 100 and the friction piece 200 are abutted and rubbed under various working conditions of different pressures, friction frequencies and friction speeds, thereby providing a more abundant and accurate data basis for the test and improving the applicability of the test system and the accuracy of the test result. The image information collector 53 can collect the image information at the first sample clamp 1 and the second sample clamp 2 and transmit to the control host 54 for display, which is convenient for the operator to intuitively observe the state of the test piece 100 and the friction piece 200 such as position and wear condition outside the quiet room 61, and is helpful for real-time monitoring and analysis of the test process and timely discovery of abnormal conditions. The second noise detector 52 can detect the ambient noise and send a warning signal to the control host 54 when the ambient noise exceeds the set value, which can avoid the interference of the ambient noise on the test result, ensure the accuracy and reliability of the collected noise value generated when the test piece 100 and the friction piece 200 are abutted and rubbed, and thereby improve the accuracy of the test result and the reliability of the test system.

[0060] The implementation principle of embodiment 1 is as follows: when the automobile interior material friction test needs to be performed, a piece of test piece 100 with a width of 30 mm and a length of 50 mm and a piece of friction piece 200 with a width of 70 mm and a length of 80 mm are cut out, and the nano double-sided adhesive tape is pasted on the back of the test piece 100 and the friction piece 200. The test piece 100 and the friction piece 200 are pasted on the first sample clamp 1 and the second sample clamp 2 respectively by using the nano double-sided adhesive tape. Then, according to the actual use condition, the motion speed and frequency of the reciprocating driving piece 4 are set by controlling the host computer 54. At the same time, the lifting seat 32 is controlled to rise by rotating the lead screw 33, so as to drive the test piece 100 on the first sample clamp 1 to approach the friction piece 200 on the second sample clamp 2, and the test piece 100 is vertically made to abut against the friction piece 200 according to the pressure feedback of the pressure sensor 34, so that the test piece 100 accurately abuts against the friction piece 200 with a preset pressure. Subsequently, the reciprocating driving piece 4 is started to drive the second sample clamp 2 to reciprocate relative to the first sample clamp 1 through the transmission piece 7, so that the test piece 100 and the friction piece 200 are rubbed to simulate the actual friction process. The first noise detector 51 collects the noise value generated when the test piece 100 and the friction piece 200 abut against each other and returns the noise value to the host computer 54. After calculation, the host computer 54 displays the friction noise size, the abutment force of the test piece 100 and the friction piece 200, the friction speed and the friction frequency on the display screen of the host computer 54, so that the tester can analyze the test result. In addition, during the test, the second noise detector 52 monitors the environmental noise in the quiet room 61 in real time, and sends a warning signal to the host computer 54 when the environmental noise in the quiet room 61 is greater than or equal to 20 dB, prompting that the test result is invalid and needs to be retested. Moreover, the reciprocating driving piece 4 is installed in the soundproof cover 62, which maximally reduces the influence of the noise generated by the reciprocating driving piece 4 during operation on the noise size detected by the first noise detector 51. The second noise detector 52 is installed beside the transmission piece 7 to monitor the environmental noise in the transmission piece 7 and the quiet room 61 during the test, which can fundamentally reduce the influence of the equipment operation noise and the environmental noise on the result, and ensure the accuracy and precision of the test result. In summary, the automobile interior material friction sound test system can directly output the sound value and sound characteristics in the actual use condition compared with the existing adhesive abnormal sound test equipment, which helps the user to conveniently and quickly screen the samples. At the same time, the application range of the material is wide, which can be a fabric, a leather, a suede, a plastic plate, a metal piece and other automobile interior materials. Embodiment 2

[0061] With reference to Figure 4 and Figure 5 , the difference between embodiment 2 and embodiment 1 mainly lies in that the transmission piece 7 comprises a support frame 71, a spring 72, a first transmission rod 73, a second transmission rod 74 and a magnetic linkage 75.

[0062] Specifically, in the embodiment, the support frame 71 is a rod-shaped member made of metal; the spring 72 is a conical spiral spring 72; the first transmission rod 73 and the second transmission rod 74 are both cylindrical rods made of metal. The support frame 71 is fixedly installed on the damping table 8 and located between the soundproof cover 62 and the lifting assembly 3, and the first transmission rod 73 is movably connected with the support frame 71 through the spring 72. The spring 72 is sleeved outside the first transmission rod 73, the central axis of the spring 72 is coaxial with the central axis of the first transmission rod 73, and the central axis of the spring 72 is parallel to the sliding direction of the sliding seat 42; the first end of the spring 72 is fixedly connected with the outer wall of the first transmission rod 73, and the second end of the spring 72 is fixedly connected with the support frame 71; the second sample clamp 2 is detachably connected with the first transmission rod 73 through a bolt.

[0063] The second transmission rod 74 is coaxially arranged with the first transmission rod 73, the first end of the second transmission rod 74 is fixedly connected with the sliding seat 42 of the reciprocating driving member 4, and the reciprocating driving member 4 can drive the second transmission rod 74 to linearly and reciprocally slide along the side of the first sample clamp 1 for installing the to-be-tested member 100. The second end of the second transmission rod 74 penetrates through the sound-damping passage formed in the soundproof cover 62, and is non-contact transmissionally connected with the first transmission rod 73 through the magnetic linkage 75, so that the second transmission rod 74 drives the first transmission rod 73 and the second sample clamp 2 to synchronously slide when the second transmission rod 74 slides.

[0064] In this way, the reciprocating driving member 4 drives the second transmission rod 74 to reciprocally slide, and the first transmission rod 73 slides together with the second transmission rod 74 through the magnetic linkage 75, and the second sample clamp 2 slides together with the first transmission rod 73, so as to realize that the reciprocating driving member 4 drives the second sample clamp 2 to linearly and reciprocally slide along the side of the first sample clamp 1 for installing the to-be-tested member 100. The design of the magnetic linkage 75 makes the second transmission rod 74 non-contact connected with the first transmission rod 73, which can prevent the noise generated when the reciprocating driving member 4 operates from being transmitted to the first transmission rod 73 through the second transmission rod 74, avoids the generation of sound bridge, and further improves the accuracy of the test result. The spring 72 can provide support and guiding effect for the sliding of the first transmission rod 73 by using its own characteristics, so that the first transmission rod 73 does not generate relative friction with other components in the sliding process, further reduces the generation of noise, and improves the accuracy of the test result.

[0065] Referring to Figure 4 and Figure 5 In the embodiment, the magnetic linkage 75 includes a first magnetic member 751, a second magnetic member 752, and a third magnetic member 753. The first magnetic member 751 is a disc-shaped permanent magnet, the first magnetic member 751 is fixed to one end of the first transmission rod 73 close to the second transmission rod 74, and the first magnetic member 751 is coaxial with the first transmission rod 73.

[0066] The second magnetic member 752 is also a disc-shaped permanent magnet, and is fixed to the second transmission rod 74 at a position close to the first transmission rod 73. The second magnetic member 752 is coaxial with the second transmission rod 74. The magnetic pole of the side of the first magnetic member 751 facing the second magnetic member 752 is the same as the magnetic pole of the side of the second magnetic member 752 facing the first magnetic member 751, so that the first magnetic member 751 and the second magnetic member 752 repel each other. The repulsive force between the first magnetic member 751 and the second magnetic member 752 is parallel to the sliding direction of the slide 42.

[0067] The third magnetic member 753 is a ring-shaped permanent magnet, and the inner diameter of the ring is larger than the diameter of the first transmission rod 73. The third magnetic member 753 is also fixed to the second transmission rod 74 at a position close to the first transmission rod 73. The third magnetic member 753 is arranged outside the first transmission rod 73, and is located on the side of the first magnetic member 751 away from the second magnetic member 752. The third magnetic member 753 does not contact the first transmission rod 73. The magnetic pole of the side of the third magnetic member 753 facing the first magnetic member 751 is the same as the magnetic pole of the side of the first magnetic member 751 facing the third magnetic member 753, so that the third magnetic member 753 and the first magnetic member 751 repel each other. The repulsive force between the third magnetic member 753 and the first magnetic member 751 is also parallel to the sliding direction of the slide 42. The magnitude of the repulsive force between the first magnetic member 751 and the second magnetic member 752 is equal to the magnitude of the repulsive force between the third magnetic member 753 and the first magnetic member 751.

[0068] In this way, the first magnetic member 751 is suspended between the second magnetic member 752 and the third magnetic member 753, realizing the contactless transmission connection between the first transmission rod 73 and the second transmission rod 74. This can prevent the noise generated by the reciprocating drive member 4 from being transmitted to the first transmission rod 73 through the second transmission rod 74, avoiding the generation of sound bridges.

[0069] It should be noted that the force of the spring 72 resisting bending deformation along its own axis needs to be greater than the pressure applied by the to-be-tested member 100 to the friction member 200, so as to prevent the spring 72 from bending and causing the sliding direction of the second sample clamp 2 to deviate after bending.

[0070] The implementation principle of the embodiment 2 is that the reciprocating driving member 4 drives the second transmission rod 74 to slide reciprocally, and the first transmission rod 73 is driven to slide by the magnetic linkage 75, and the second sample clamp 2 is driven to slide by the first transmission rod 73, so that the reciprocating driving member 4 drives the second sample clamp 2 to slide linearly along the surface of the first sample clamp 1 for installing the measured member 100. The design of the magnetic linkage 75 makes the second transmission rod 74 and the first transmission rod 73 not in contact, so that the noise generated by the reciprocating driving member 4 is not transmitted to the first transmission rod 73 through the second transmission rod 74, the sound bridge is avoided, and the accuracy of the test result is further improved. The spring 72 can provide support and guide for the sliding of the first transmission rod 73 by using the characteristics of the spring 72, so that the first transmission rod 73 does not generate relative friction with other parts during the sliding process, the generation of noise is further reduced, and the accuracy of the test result is improved.

[0071] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A system for testing the frictional sound of an automotive interior material, characterized by, The utility model relates to a kind of test device for testing the friction of sample, including: First sample clamp (1) for installing measured piece (100); Second sample clamp (2) is movably arranged with the first sample clamp (1), for installing friction piece (200); Lifting assembly (3) is connected the first sample clamp (1), for driving the first sample clamp (1) close to the second sample clamp (2), so that measured piece (100) exerts preset value's pressure and abuts friction piece (200); Reciprocating drive (4) is connected the second sample clamp (2), for driving the second sample clamp (2) along the one side of the first sample clamp (1) for installing measured piece (100) parallel to preset friction speed and friction frequency does relative reciprocating sliding, so that measured piece (100) and friction piece (200) abut after generating relative friction; Data processing assembly (5) is used for collecting the noise value generated when measured piece (100) and friction piece (200) abut friction under different pressure, friction frequency and friction speed; Isolation assembly (6) is used for isolating the first sample clamp (1), the second sample clamp (2), the lifting assembly (3) and the reciprocating drive (4) from outside, and isolating the reciprocating drive (4) from the first sample clamp (1), the second sample clamp (2) and the lifting assembly (3).

2. The automotive interior material frictional sound test system of claim 1, wherein: The isolation assembly (6) includes soundproof room (61) and soundproof cover (62);The reciprocating drive (4) is located in the soundproof cover (62), and the soundproof cover (62), the first sample clamp (1), the second sample clamp (2), the lifting assembly (3) and reciprocating drive (4) are located in the soundproof room (61).

3. The automotive interior material frictional sound test system of claim 2, wherein: It further includes transmission member (7), and the reciprocating drive (4) is connected with the second sample clamp (2) through the transmission member (7);One end of the transmission member (7) is connected with the output end of the reciprocating drive (4), and the other end penetrates the soundproof cover (62) and is connected with the second sample clamp (2).

4. The automotive interior material frictional sound test system of claim 3, wherein: The transmission member (7) includes support frame (71), spring (72), first transmission rod (73), second transmission rod (74) and magnetic force linkage (75);The support frame (71) is fixedly arranged, and the first transmission rod (73) is movably connected with the support frame (71) through the spring (72);One end of the spring (72) is connected with the outer wall of the first transmission rod (73), and the other end of the spring (72) is connected with the support frame (71), and the second sample clamp (2) is connected with the first transmission rod (73);The second transmission rod (74) is connected with the reciprocating drive (4), and the reciprocating drive (4) can drive the second transmission rod (74) to linearly reciprocate along the one side of the first sample clamp (1) for installing measured piece (100). The first transmission rod (73) is connected with the second transmission rod (74) through the magnetic linkage (75) in a non-contact transmission connection, so that the second transmission rod (74) drives the first transmission rod (73) and the second sample clamp (2) to slide synchronously.

5. The automotive interior material frictional sound test system of claim 4, wherein: The magnetic linkage (75) comprises a first magnetic member (751), a second magnetic member (752) and a third magnetic member (753). The first magnetic member (751) is fixedly connected to the first transmission rod (73), the second magnetic member (752) is fixedly connected to the second transmission rod (74), and the second magnetic member (752) is oppositely arranged with the first magnetic member (751). The first magnetic member (751) and the second magnetic member (752) repel each other, and the repulsive force generated between the first magnetic member (751) and the second magnetic member (752) is parallel to the output direction of the reciprocating driving member (4). The third magnetic member (753) is fixedly connected to the second transmission rod (74), and the third magnetic member (753) is located on the side of the first magnetic member (751) away from the second magnetic member (752). The third magnetic member (753) and the first magnetic member (751) repel each other, and the repulsive force generated between the third magnetic member (753) and the first magnetic member (751) is parallel to the output direction of the reciprocating driving member (4). The repulsive force between the first magnetic member (751) and the second magnetic member (752) is equal to the repulsive force between the third magnetic member (753) and the first magnetic member (751).

6. The automotive interior material frictional sound test system of claim 1, wherein: The lifting assembly (3) comprises a mounting seat (31), a lifting seat (32), a lead screw (33) and a pressure sensor (34). The mounting seat (31) is fixedly arranged relative to the reciprocating driving member (4). The lifting seat (32) is in sliding connection with the mounting seat (31), and the sliding direction of the lifting seat (32) intersects with the surface of the first sample clamp (1) for mounting the to-be-tested member (100). The lead screw (33) is in rotational connection with the mounting seat (31), and the lead screw (33) is in threaded connection with the lifting seat (32). The rotational axis of the lead screw (33) is parallel to the sliding direction of the lifting seat (32). The first sample clamp (1) is in movable connection with the lifting seat (32), and the pressure sensor (34) is arranged between the first sample clamp (1) and the lifting seat (32).

7. The automotive interior material frictional sound test system of claim 1, wherein: The data processing assembly (5) comprises a first noise detector (51) and a control host (54); the first noise detector (51) is arranged beside the first sample clamp (1) or the second sample clamp (2) and is used for detecting a noise value generated when the to-be-tested member (100) and the friction member (200) are in abutment friction; the control host (54) is electrically connected with the first noise detector (51), the reciprocating driving member (4) and the pressure sensor (34) and is used for controlling the movement speed and frequency of the reciprocating driving member (4) and collecting the noise value generated when the to-be-tested member (100) and the friction member (200) are in abutment friction under different pressures, friction frequencies and friction speeds.

8. The automotive interior material frictional sound test system of claim 7, wherein: The data processing assembly (5) further comprises an image information collector (53) and a second noise detector (52) electrically connected with the control host (54); the image information collector (53) is used for collecting image information at the first sample clamp (1) and the second sample clamp (2) and transmitting the image information to the control host (54) for display; the second noise detector (52) is used for detecting environmental noise and sending a warning signal to the control host (54) when the environmental noise exceeds a set value.

9. The automotive interior material frictional sound test system of claim 1, wherein: Further comprising a damping table (8), and the lifting assembly (3) and the reciprocating driving member (4) are both mounted on the damping table (8).

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