An interior leather sewing fatigue simulation device and method

Abstract

The present application relates to an interior leather sewing fatigue simulation device and method. The device includes a box body, a clamping device, a first driving mechanism, a force applying mechanism, and a temperature and humidity device. Two partition plates are movably provided on the box body, and the partition plates divide the inner space of the box body into a high-temperature chamber, a buffer chamber, and a low-temperature chamber arranged in sequence. The clamping device is movably arranged in the box body and is used for clamping the interior leather to send the interior leather into the high-temperature chamber, the buffer chamber, or the low-temperature chamber. The first driving mechanism is connected to the clamping device and is used for driving the clamping device to reciprocate. The force applying mechanism is used for applying a load to the interior leather. The temperature and humidity device is connected to the box body and is used for regulating the temperature and humidity of the high-temperature chamber and the low-temperature chamber. Through this device, the harsh working conditions encountered by the seat leather during the whole vehicle use can be comprehensively simulated, and thus the change of the sewing fatigue performance of the leather can be accurately judged.

Description

Technical Field

[0001] This application relates to the technical field of leather seams, and particularly relates to an interior leather sewing fatigue simulation device and method. Background Art

[0002] The increasing demand for high perception of automotive interiors has attracted more and more attention from consumers. A large number of interior parts use leather covers with stitches to enhance the sense of luxury and comfort. Especially for seats, a large amount of leather is used as the seat cover, and stitches are used in the backrest and seat cushion areas to achieve specific patterns or segmented shapes. In different climate environments, when the driver and passengers sit on and leave the seat, the leather and stitches of the seat cover will be repeatedly stretched and fatigued. This working condition occurs very frequently. When verifying the sewing fatigue performance of leather, it is usually verified and judged under a single condition in a standard environment. However, in actual vehicle use, it often faces working conditions such as high temperature + fatigue, low temperature + fatigue, and high and low temperature + fatigue. Its use environment is more complex, and a comprehensive judgment of the leather use working condition is required. Single test verification is an ideal environment, and actual use is far more than a single test environment.

[0003] Therefore, how to truly and accurately simulate the vehicle running conditions and then accurately judge the change of the sewing fatigue performance of leather is a difficult point. Summary of the Invention

[0004] The embodiments of this application provide an interior leather sewing fatigue simulation device and method. Through this device, the harsh working conditions encountered by seat leather during vehicle use can be comprehensively simulated, and then the change of the sewing fatigue performance of leather can be accurately judged.

[0005] In a first aspect, an interior leather sewing fatigue simulation device is provided, which includes:

[0006] A box body, on which two partitions are movably provided. The partitions divide the inner space of the box body into a high-temperature chamber, a buffer chamber, and a low-temperature chamber arranged in sequence;

[0007] A clamping device, which is movably arranged in the box body and is used for clamping interior leather to send the interior leather into the high-temperature chamber, the buffer chamber, or the low-temperature chamber;

[0008] A first driving mechanism, which is connected to the clamping device and is used for driving the clamping device to move reciprocally;

[0009] A force applying mechanism, which is used for applying a load to the interior leather;

[0010] A temperature and humidity device, which is connected to the box body and is used for regulating the temperature and humidity of the high-temperature chamber and the low-temperature chamber.

[0011] In some embodiments, a guide groove is provided on the box body;

[0012] The clamping device includes:

[0013] A base provided with a convex handle, the convex handle passing through the guiding groove, and the first driving mechanism being connected to the convex handle to drive the base to reciprocate along the guiding groove;

[0014] Two clamping jaws, which are spaced apart along a direction perpendicular to the length direction of the guiding groove and are mounted on the base and are used to clamp or loosen the interior trim leather.

[0015] In some embodiments, sealing strips are provided on two side walls of the guiding groove.

[0016] In some embodiments, an elastic member for buffering the interior trim leather is further provided on the base.

[0017] In some embodiments, the clamping device further includes a second driving mechanism mounted on the base, the second driving mechanism being connected to at least one of the clamping jaws and being used to drive the clamping jaw to approach or move away from the other clamping jaw.

[0018] In some embodiments, one of the high-temperature chamber, the buffer chamber and the low-temperature chamber is respectively configured with one of the force-applying mechanisms;

[0019] The force-applying mechanism includes:

[0020] An abutting portion;

[0021] A connecting rod, one end of which is connected to the abutting portion;

[0022] A third driving mechanism, which is arranged in the box body and is connected to the other end of the connecting rod, and the third driving mechanism is used to drive the abutting portion to approach or move away from the interior trim leather.

[0023] In some embodiments, a socket is provided on one wall surface of the box body, and the partition plate is inserted into the socket.

[0024] In some embodiments, a plug-in groove is provided on another wall surface of the box body corresponding to the position of the socket, and the plug-in groove is adapted to the partition plate;

[0025] And / or, a sealing member is further provided at the end of the partition plate located inside the box body.

[0026] In some embodiments, the partition plate is located in the inner space of the box body, and its top is rotatably connected to the top of the box body.

[0027] In a second aspect, a method for simulating the sewing fatigue of interior trim leather is provided, which includes:

[0028] Providing an interior trim leather sewing fatigue simulation device as described in any one of the above;

[0029] Clamp the interior trim leather on the clamping device, and apply a chemical medium to the sewing position of the interior trim leather;

[0030] According to the set test conditions, control the first driving mechanism, the force applying mechanism and the temperature and humidity device to perform corresponding actions;

[0031] Take it out and measure the sewing strength of the interior trim leather and the maximum diameter of the needle holes at the sewing position.

[0032] The beneficial effects brought by the technical solution provided by this application include:

[0033] The embodiment of this application provides an interior trim leather sewing fatigue simulation device and method. The device provided by this application uses a partition to divide the box body to form a high-temperature chamber and a low-temperature chamber, and at the same time uses a temperature and humidity device to control the temperature and humidity of the high-temperature chamber and the low-temperature chamber, so as to be able to simulate the high and low temperature conditions encountered during the use of the whole vehicle. The interior trim leather is clamped by a clamping device, and a load is applied to the interior trim leather through a force applying mechanism, so that the load applied to the interior trim leather when a passenger sits on the seat can be simulated. The clamping device is driven to move by the first driving mechanism to drive the interior trim leather into the high-temperature chamber, the buffer chamber and the low-temperature chamber, and finally various harsh conditions in the actual use of the interior trim leather can be accurately simulated, and then the change of the sewing fatigue performance of the interior trim leather can be accurately judged.

[0034] In actual use, chemical media such as hand cream, face cream, 75% alcohol, acidic sweat, alkaline sweat, etc. may adhere to the sewing line of the interior trim leather. During the simulation test, a chemical medium can be applied to the sewing line of the interior trim leather, so that the actual use conditions of the interior trim leather can be further simulated, such as high temperature + chemical medium + fatigue, low temperature + chemical medium + fatigue, high and low temperature + chemical medium + fatigue, etc., and then the change of the sewing fatigue performance of the leather under the action of different chemical media can be accurately judged. Description of the Drawings

[0035] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to these drawings.

[0036] Figure 1 Schematic diagram of an interior trim leather sewing fatigue simulation device provided by an embodiment of this application;

[0037] Figure 2 For Figure 1 Cross-sectional view of;

[0038] Figure 3Another schematic diagram of the interior leather sewing fatigue simulation device provided by the embodiment of the present application;

[0039] Figure 4 is Figure 3 a cross-sectional view of.

[0040] In the figure: 1. Box body; 10. Partition board; 11. High-temperature chamber; 12. Buffer chamber; 13. Low-temperature chamber; 14. Guide groove; 15. Box door; 2. Clamping device; 20. Base; 21. Claw; 22. Elastic member; 3. Force application mechanism; 30. Contact portion; 31. Connecting rod; 4. Temperature and humidity device; 5. Interior leather. Detailed implementation manners

[0041] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some but not all of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application.

[0042] Referring to Figure 1 , Figure 2 , Figure 3 and Figure 4 as shown, the present application provides an interior leather sewing fatigue simulation device, which includes a box body 1, a clamping device 2, a first driving mechanism, a force application mechanism 3 and a temperature and humidity device 4. Two partition boards 10 are movably arranged on the box body 1. The partition boards 10 are made of stainless steel and are surface anodized. The partition boards 10 divide the inner space of the box body 1 into a high-temperature chamber 11, a buffer chamber 12 and a low-temperature chamber 13 arranged in sequence. Two box doors 15 are arranged on the box body 1, and the two box doors 15 are respectively used to open and close the high-temperature chamber 11 and the low-temperature chamber 13; the clamping device 2 is movably arranged in the box body 1, so that it can enter the high-temperature chamber 11, the buffer chamber 12 and the low-temperature chamber 13. The clamping device 2 is used to clamp the interior leather 5 to send the interior leather 5 into the high-temperature chamber 11, the buffer chamber 12 or the low-temperature chamber 13; the first driving mechanism is connected to the clamping device 2, and the first driving mechanism is used to drive the clamping device 2 to move reciprocally; the force application mechanism 3 is used to apply a load to the interior leather 5 to simulate the load applied to the interior leather 5 when an occupant sits on the seat; the temperature and humidity device 4 is connected to the box body 1, and the temperature and humidity device 4 is used to regulate the temperature and humidity of the high-temperature chamber 11 and the low-temperature chamber 13.

[0043] The device provided by this application uses a partition 10 to divide the box body 1, forming a high-temperature chamber 11 and a low-temperature chamber 13. At the same time, a temperature and humidity device 4 is used to regulate the temperature and humidity of the high-temperature chamber 11 and the low-temperature chamber 13, so as to be able to simulate the high and low temperature conditions encountered during the use of the whole vehicle. The clamping device 2 is used to clamp the interior leather 5, and a loading force is applied to the interior leather 5 through the force application mechanism 3, so that the load applied to the interior leather 5 when an occupant sits on the seat can be simulated. The first driving mechanism is used to drive the clamping device 2 to move, so as to drive the interior leather 5 into the high-temperature chamber 11, the buffer chamber 12 and the low-temperature chamber 13. Finally, various harsh conditions in the actual use of the interior leather 5 can be accurately simulated, and then the change of the sewing fatigue performance of the interior leather 5 can be accurately judged.

[0044] Since in actual use, chemical media may adhere to the stitches of the interior leather 5, such as hand cream, face cream, 75% alcohol, acidic sweat, alkaline sweat, etc. During the simulation test, chemical media can be applied to the stitches of the interior leather 5, so that the actual use conditions of the interior leather 5 can be further simulated, such as high temperature + chemical media + fatigue, low temperature + chemical media + fatigue, high and low temperature + chemical media + fatigue, etc., and then the change of the sewing fatigue performance of the leather under the action of different chemical media can be accurately judged.

[0045] The temperature and humidity device 4 in this application can adopt an existing integrated temperature and humidity control device to achieve the purpose of providing the required temperature and humidity for the high-temperature chamber 11 and the low-temperature chamber 13. A temperature and humidity device 4 is installed in each of the high-temperature chamber 11 and the low-temperature chamber 13 to independently regulate the temperature and humidity of the high-temperature chamber 11 and the low-temperature chamber 13.

[0046] The temperature and humidity device 4 in this application can also adopt an existing temperature device and humidity device. For the temperature and humidity device 4 installed in the high-temperature chamber 11, its temperature device can provide high temperature for the high-temperature chamber 11, and its humidity device can provide humidity for the high-temperature chamber 11; for the temperature and humidity device 4 installed in the low-temperature chamber 13, its temperature device can provide low temperature for the low-temperature chamber 13, and its humidity device can provide humidity for the low-temperature chamber 13.

[0047] Among them, the temperature control range of the above-mentioned high-temperature chamber 11 is 30°C to 60°C, and the heating rate is 15°C / min; the humidity control range is 10% to 95%RH.

[0048] The temperature control range of the above-mentioned low-temperature chamber 13 is -40°C to 20°C, and the cooling rate is 15°C / min; the humidity control range is 10% to 95%RH.

[0049] To accurately control the temperature and humidity, temperature sensors and humidity sensors can be installed in both the high-temperature chamber 11 and the low-temperature chamber 13, and connected to the corresponding temperature and humidity device 4 to send temperature and humidity data to the temperature and humidity device 4. After receiving the data, the temperature and humidity device 4 compares it with the target temperature and target humidity, and adjusts the temperature and humidity according to the comparison result.

[0050] To achieve the purpose of clamping the interior leather 5, the present application also provides the specific structure of the clamping device 2. Refer to Figure 2 or Figure 4 As shown, a guiding groove 14 is formed in the box body 1. The guiding groove 14 penetrates through the wall surface of the box body 1, and the length of the guiding groove 14 extends from the high-temperature chamber 11 to the buffer chamber 12 and the low-temperature chamber 13, so as to ensure that the clamping device 2 can enter the high-temperature chamber 11, the buffer chamber 12 and the low-temperature chamber 13. The clamping device 2 includes a base 20 and two clamping jaws 21. A convex handle is provided on the base 20, and the convex handle is inserted into the guiding groove 14. The first driving mechanism is located outside the box body 1 and is connected to the convex handle. The first driving mechanism drives the convex handle to reciprocate along the guiding groove 14, so that the base 20 can reciprocate along the guiding groove 14; the two clamping jaws 21 are installed on the base 20 at intervals in a direction perpendicular to the length direction of the guiding groove 14. The two clamping jaws 21 are used to clamp the interior leather 5 so that the interior leather 5 can be flattened, or to loosen the interior leather 5 to take out the interior leather 5. The two clamping jaws 21 can adopt existing clamping jaws.

[0051] Due to the existence of the guiding groove 14, the high-temperature chamber 11, the buffer chamber 12 and the low-temperature chamber 13 are all connected to the outside. Although they are connected to the outside, on the one hand, by optimizing the size of the guiding groove 14, the influence of the guiding groove 14 on the temperature and humidity in the high-temperature chamber 11 and the low-temperature chamber 13 can be reduced as much as possible; on the other hand, the temperature and humidity can be adjusted by the temperature and humidity device 4 to ensure that the high-temperature chamber 11 and the low-temperature chamber 13 can maintain the corresponding temperature and humidity.

[0052] Further, in order to more precisely control the temperature and humidity, in some preferred embodiments, sealing strips are provided on the two side walls of the guiding groove 14. The two sealing strips can be abutted to achieve sealing, and the sealing strips have a certain elastic deformation ability, which can ensure that the convex handle moves between the two sealing strips, and after moving, the sealing strips recover and achieve abutting and sealing again. The sealing strips can be made of materials such as rubber and plastic with a certain elasticity.

[0053] In order to make the test data closer to the actual working conditions, in some preferred embodiments, an elastic member 22 for buffering the interior leather 5 is also provided on the base 20. For example, a spring can be used, or materials used in the seat such as sponge can be adopted. The elastic member 22 is used to simulate the actual filling in the seat, so that when the loading mechanism 3 applies a load to the interior leather 5, the actual use situation of the interior leather 5 can be simulated.

[0054] To facilitate the flattening of the interior leather 5, the clamping device 2 further includes a second driving mechanism mounted on the base 20. The second driving mechanism is connected to at least one of the jaws 21 and is used to drive the jaws 21 to approach or move away from the other jaw 21.

[0055] To simulate the force on the interior leather 5, the present application provides the specific structure of the force applying mechanism 3. Specifically, a force applying mechanism 3 is respectively arranged in the high-temperature chamber 11, the buffer chamber 12 and the low-temperature chamber 13. The force applying mechanism 3 includes an abutting portion 30, a connecting rod 31 and a third driving mechanism. The surface of the abutting portion 30 for contacting the interior leather 5 can be made into an arc surface to model the shape of the human hip. One end of the connecting rod 31 is connected to the abutting portion 30, and the third driving mechanism is arranged in the box body 1 and is connected to the other end of the connecting rod 31. The third driving mechanism is used to drive the abutting portion 30 to approach or move away from the interior leather 5.

[0056] The present application uses the third driving mechanism to drive the connecting rod 31 to drive the abutting portion 30 to approach the interior leather 5 to apply a load to the interior leather 5, or drive the abutting portion 30 to move away from the interior leather 5 to cancel the load applied to the interior leather 5.

[0057] During actual riding, since the road surface is not flat, the occupant will keep bouncing. Therefore, the third driving mechanism can be used to drive the abutting portion 30 to reciprocate at a certain frequency, so as to simulate the real riding scenario.

[0058] The third driving mechanism can be arranged inside the box body 1 or outside the box body 1. When it is arranged outside the box body 1, an opening needs to be made on the box body 1 for the connecting rod 31 to penetrate the box body 1, and a sealing ring can be installed at this hole.

[0059] In the present application, there are various installation methods for the partition 10.

[0060] For example, as shown in Figure 2 In a preferred embodiment, a socket is provided on a wall surface of the box body 1, and the partition 10 is inserted into the socket. By inserting the partition 10, the separation between the high-temperature chamber 11, the buffer chamber 12 and the low-temperature chamber 13 is realized. When the clamping device 2 needs to move from one chamber to another chamber, the partition 10 can be pulled out.

[0061] In order to achieve the separation and sealing between the high-temperature chamber 11, the buffer chamber 12, and the low-temperature chamber 13, on another wall surface of the box body 1, at a position corresponding to the socket, there is a plug-in slot, which is adapted to the partition 10. When the partition 10 is inserted, it is ensured that the end of the partition 10 extends into the plug-in slot. More preferably, a sealing member is provided at the end of the partition 10 located inside the box body 1. The sealing member is made of rubber and plastic material with elastic deformation function. On the one hand, it can achieve sealing. On the other hand, when the partition 10 is inserted, it can reduce the impact on the box body 1, protect the partition 10 and the box body 1, and improve the service life.

[0062] For another example, as shown in Figure 4 In a preferred embodiment, the partition 10 is located in the inner space of the box body 1, and its top is rotatably connected to the top of the box body 1. Under normal circumstances, the partition 10 separates the high-temperature chamber 11, the buffer chamber 12, and the low-temperature chamber 13. When the clamping device 2 needs to move from one chamber to another chamber, under the action of the first driving mechanism, the clamping device 2 pushes against the partition 10, and the partition 10 rotates and opens under the pushing action of the clamping device 2. After the clamping device 2 separates from the partition 10, the partition 10 automatically resets.

[0063] The reset function between the partition 10 and the box body 1 can be realized by commonly used methods such as setting a reset spring.

[0064] For the above-mentioned first driving mechanism, second driving mechanism, and third driving mechanism, commonly used devices can be selected to achieve their respective functions.

[0065] The present application also provides an interior leather sewing fatigue simulation method, which includes:

[0066] 101: Provide the interior leather sewing fatigue simulation equipment as described above.

[0067] 102: Clamp the interior leather 5 on the clamping device 2. The sewing line position of the interior leather 5 is smeared with a chemical medium, and the types of chemical media include hand cream, face cream, 75% alcohol, acidic sweat, and alkaline sweat.

[0068] 103: According to the set test working conditions, control the first driving mechanism, the force application mechanism 3, and the temperature and humidity device 4 to perform corresponding actions.

[0069] Specifically, the set test working conditions include high temperature + chemical medium + fatigue, low temperature + chemical medium + fatigue, and high and low temperature + chemical medium + fatigue.

[0070] When performing high temperature + chemical medium + fatigue, the clamping device 2 is driven into the high temperature chamber 11 through the first driving mechanism; the loading mechanism 3 is used to apply a load A1 to the interior leather 5, and the load application frequency is B1; through the temperature and humidity device 4, the temperature X1 and humidity Y1 in the high temperature chamber 11 are adjusted, and the interior leather 5 is maintained in the high temperature chamber 11 for Z1 hours.

[0071] When performing low temperature + chemical medium + fatigue, the clamping device 2 is driven into the low temperature chamber 13 through the first driving mechanism; the loading mechanism 3 is used to apply a load A2 to the interior leather 5, and the load application frequency is B2; through the temperature and humidity device 4, the temperature X2 and humidity Y2 in the low temperature chamber 13 are adjusted, and the interior leather 5 is maintained in the low temperature chamber 13 for Z2 hours.

[0072] When performing high and low temperature + chemical medium + fatigue, the clamping device 2 is driven into the high temperature chamber 11 through the first driving mechanism; the loading mechanism 3 is used to apply a load A1 to the interior leather 5, and the load application frequency is B1; through the temperature and humidity device 4, the temperature X1 and humidity Y1 in the high temperature chamber 11 are adjusted, and the interior leather 5 is maintained in the high temperature chamber 11 for Z1 hours. Then enter the buffer chamber 12 to buffer for a period of time, and the loading mechanism 3 is used to apply a load A3 to the interior leather 5, and the load application frequency is B3. Then through the first driving mechanism, the clamping device 2 is driven into the low temperature chamber 13; the loading mechanism 3 is used to apply a load A2 to the interior leather 5, and the load application frequency is B2; through the temperature and humidity device 4, the temperature X2 and humidity Y2 in the low temperature chamber 13 are adjusted, and the interior leather 5 is maintained in the low temperature chamber 13 for Z2 hours. Repeat several times.

[0073] The range of X1 is 30°C to 60°C, the range of X2 is -40°C to 20°C, the ranges of Y1 and Y2 are 10% to 95% RH, and the ranges of Z1 and Z2 are 0.5 to 168 h.

[0074] When performing high and low temperature + chemical medium + fatigue, usually A1 = A2 = A3 and B1 = B2 = B3. Of course, it can also be changed according to the simulation needs.

[0075] 104: Take out and measure the sewing strength of the interior leather 5 and the maximum diameter of the needle holes at the sewing thread positions.

[0076] The following is illustrated through examples and comparative examples.

[0077] Example 1: Simulate the working condition of a standard weight male sitting on a seat without turning on the air conditioner in winter in the north

[0078] The chemical medium is hand cream, the load applied by the loading mechanism 3 is 4 kg, and the frequency is 40 times / min; the low temperature chamber is at -20°C * 60% RH * 168 h, and the interior leather 5 is taken out to test the maximum diameter of the sewing needle holes and the sewing strength.

[0079] Example 2: Simulate the working conditions of turning on the air conditioner in winter in the north and a thin lady sitting on the seat

[0080] The chemical medium is facial cream, the load applied by the force application mechanism 3 is 1 kg, and the frequency is 20 times / min; low temperature chamber -40°C * 65% RH * 0.5 h → buffer chamber 0.5 h → high temperature chamber 35°C 70% RH * 11 h, cycle 14 times, take out the interior leather 5 to test the maximum diameter of the sewing needle holes and test the sewing strength.

[0081] Example 3: Simulate the working conditions of not turning on the air conditioner in summer in the west and a lady of standard weight sitting on the seat

[0082] The chemical medium is 75% alcohol, the load applied by the force application mechanism 3 is 2 kg, and the frequency is 20 times / min; high temperature chamber 60°C * 10% RH * 0.5 h → high temperature chamber 45°C * 30% RH * 12 h, cycle 14 times, take out the interior leather 5 to test the maximum diameter of the sewing needle holes and test the sewing strength;

[0083] It should be noted that here it is to simulate that the air conditioner is not turned on in summer. Before getting in the car, the car door is closed, the temperature inside the car is 60°C, and after getting in the car, the window is opened, so the temperature drops to 45°C.

[0084] Example 4: Simulate the working conditions of turning on the air conditioner in summer in the west and an obese man sitting on the seat

[0085] The chemical medium is acidic sweat, the load applied by the force application mechanism 3 is 6 kg, and the frequency is 40 times / min; high temperature chamber 60°C * 10% RH * 0.5 h → buffer chamber 0.5 h → low temperature chamber 20°C * 30% RH * 12 h, cycle 14 times, take out the interior leather 5 to test the maximum diameter of the sewing needle holes and test the sewing strength.

[0086] Example 5: Simulate the working conditions of not turning on the air conditioner in summer in the coastal area and a thin man sitting on the seat

[0087] The chemical medium is alkaline sweat, the load applied by the force application mechanism 3 is 3 kg, and the frequency is 30 times / min; high temperature chamber 40°C * 95% RH * 168 h, take out the interior leather 5 to test the maximum diameter of the sewing needle holes and test the sewing strength.

[0088] Example 6: Simulate the working conditions of turning on the air conditioner in summer in the coastal area and an obese man sitting on the seat

[0089] The chemical medium is hand cream, the load applied by the force application mechanism 3 is 6 kg, and the frequency is 40 times / min; high temperature chamber 40°C * 95% RH * 0.5 h → buffer chamber 0.5 h → low temperature chamber 15°C * 85% RH * 12 h, cycle 20 times, take out the interior leather 5 to test the maximum diameter of the sewing needle holes and test the sewing strength.

[0090] Example 7: Simulate the working condition of a standard-weight male sitting on the seat without air conditioning in the middle of summer

[0091] The chemical medium is cream, the load applied by the force application mechanism 3 is 4 kg, and the frequency is 30 times / min; in the high-temperature chamber at 35°C * 70% RH * 168 h, the interior leather 5 is taken out to test the maximum diameter of the sewing needle holes and the sewing strength.

[0092] Example 8: Simulate the working condition of a thin lady sitting on the seat with air conditioning in the middle of summer

[0093] The chemical medium is 75% alcohol, the load applied by the force application mechanism 3 is 1 kg, and the frequency is 30 times / min; in the high-temperature chamber at 35°C * 70% RH * 0.5 h → buffer chamber for 0.5 h → low-temperature chamber at 20°C * 50% RH * 12 h, cycle 20 times, the interior leather 5 is taken out to test the maximum diameter of the sewing needle holes and the sewing strength.

[0094] Example 9: Simulate the working condition of an obese male sitting on the seat without air conditioning in the middle of winter

[0095] The chemical medium is acidic sweat, the load applied by the force application mechanism 3 is 6 kg, and the frequency is 20 times / min; in the low-temperature chamber at -10°C * 85% RH * 168 h, the interior leather 5 is taken out to test the maximum diameter of the sewing needle holes and the sewing strength.

[0096] Example 10: Simulate the working condition of a standard-weight female sitting on the seat with air conditioning in the middle of winter

[0097] The chemical medium is alkaline sweat, the load applied by the force application mechanism 3 is 2 kg, and the frequency is 40 times / min; in the low-temperature chamber at -10°C * 85% RH * 0.5 h → buffer chamber for 0.5 h → high-temperature chamber at 30°C * 50% RH * 12 h, cycle 20 times, the interior leather 5 is taken out to test the maximum diameter of the sewing needle holes and the sewing strength.

[0098] Comparative Example 1: The whole vehicle is tested for road durability for 30 days in winter in Mohe without air conditioning; the outdoor temperature is about -20°C and the humidity is about 60% RH, and the passengers are standard-weight males.

[0099] Comparative Example 2: The whole vehicle is tested for road durability for 30 days in winter in Mohe with air conditioning; the outdoor temperature is about -40°C and the humidity is about 65% RH, and the passengers are thin ladies. When the air conditioning is on, the temperature in the passenger compartment is about 35°C and the humidity is about 70% RH.

[0100] Comparative Example 3: The whole vehicle is tested for road durability for 30 days in summer in Turpan without air conditioning; the outdoor temperature is about 60°C and the humidity is about 10% RH, and the passengers are standard-weight females.

[0101] Comparative Example 4: The whole vehicle was tested for 30 days on the road in summer in Turpan with the air conditioner on; the outdoor temperature was about 60°C, the humidity was about 10% RH, the passengers were obese men, and when the air conditioner was on, the temperature in the passenger compartment was about 20°C and the humidity was about 30% RH.

[0102] Comparative Example 5: The whole vehicle was tested for 30 days on the road in summer in Qionghai without the air conditioner; the outdoor temperature was about 40°C, the humidity was about 95% RH, and the passengers were thin men.

[0103] Comparative Example 6: The whole vehicle was tested for 30 days on the road in summer in Qionghai with the air conditioner on; the outdoor temperature was about 40°C, the humidity was about 95% RH, the passengers were obese men, and when the air conditioner was on, the temperature in the passenger compartment was about 15°C and the humidity was about 85% RH.

[0104] Comparative Example 7: The whole vehicle was tested for 30 days on the road in summer in Wuhan without the air conditioner; the outdoor temperature was about 35°C, the humidity was about 70% RH, and the passengers were men of standard weight.

[0105] Comparative Example 8: The whole vehicle was tested for 30 days on the road in summer in Wuhan with the air conditioner on; the outdoor temperature was about 35°C, the humidity was about 70% RH, the passengers were thin women, and when the air conditioner was on, the temperature in the passenger compartment was about 20°C and the humidity was about 50% RH.

[0106] Comparative Example 9: The whole vehicle was tested for 30 days on the road in winter in Wuhan without the air conditioner; the outdoor temperature was about -10°C, the humidity was about 85% RH, and the passengers were obese men.

[0107] Comparative Example 10: The whole vehicle was tested for 30 days on the road in winter in Wuhan with the air conditioner on; the outdoor temperature was about -10°C, the humidity was about 85% RH, the passengers were women of standard weight, and when the air conditioner was on, the temperature in the passenger compartment was about 30°C and the humidity was about 50% RH.

[0108] The above Comparative Examples 1 - 10 were tested on the real road for the whole vehicle. Comparative Example 1 corresponds to Example 1, Comparative Example 2 corresponds to Example 2, and so on.

[0109] The sewing strength test and the sewing needle hole size test were carried out on the interior leather 5 of Examples 1 - 10, and the results of the sewing strength and the maximum diameter of the sewing needle holes of the seat leather after durability of Comparative Examples 1 - 10 were compared, as shown in Table 1 below.

[0110] Table 1

[0111]

[0112]

[0113] According to the test results in Table 1, compared with the actual test results of the whole vehicle, the performance test results of Examples 1-10 fluctuate within ±5%, which can relatively truly simulate the actual working conditions of the whole vehicle, and this application can achieve an effective simulation effect.

[0114] In the description of this application, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to this application. Unless otherwise clearly specified and defined, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0115] It should be noted that in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, the element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0116] The above are only the specific embodiments of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application will not be limited to these embodiments shown herein, but will conform to the broadest scope consistent with the principles and novel features claimed herein.

Claims

1. An interior leather sewing fatigue simulation device, characterized in that, It includes: A box body (1), on which two partition plates (10) are movably arranged. The partition plates (10) divide the inner space of the box body (1) into a high-temperature chamber (11), a buffer chamber (12) and a low-temperature chamber (13) arranged in sequence; A clamping device (2), which is movably arranged in the box body (1) and is used for clamping the interior trim leather (5) to send the interior trim leather (5) into the high-temperature chamber (11), the buffer chamber (12) or the low-temperature chamber (13); A first driving mechanism, which is connected to the clamping device (2) and is used for driving the clamping device (2) to move back and forth; A force-applying mechanism (3), which is used for applying a load to the interior trim leather (5); A temperature and humidity device (4), which is connected to the box body (1) and is used for regulating the temperature and humidity of the high-temperature chamber (11) and the low-temperature chamber (13); A guiding groove (14) is formed on the box body (1). The guiding groove (14) penetrates through the wall surface of the box body (1), and the length of the guiding groove (14) extends from the high-temperature chamber (11) to the buffer chamber (12) and the low-temperature chamber (13); The clamping device (2) includes: A base (20), on which a convex handle is provided. The convex handle penetrates through the guiding groove (14), and the first driving mechanism is connected to the convex handle to drive the base (20) to move back and forth along the guiding groove (14); Two clamping jaws (21), which are installed on the base (20) at intervals in a direction perpendicular to the length direction of the guiding groove (14) and are used for clamping or loosening the interior trim leather (5); Sealing strips are provided on two side walls of the guiding groove (14); An elastic member (22) for buffering the interior trim leather (5) is further provided on the base (20); The clamping device (2) further includes a second driving mechanism installed on the base (20). The second driving mechanism is connected to at least one of the clamping jaws (21) and is used for driving the clamping jaws (21) to approach or move away from the other clamping jaw (21); One said force-applying mechanism (3) is respectively configured for the high-temperature chamber (11), the buffer chamber (12) and the low-temperature chamber (13); The force-applying mechanism (3) includes: An abutting portion (30), the surface of which in contact with the interior trim leather (5) is an arc surface; A connecting rod (31), one end of which is connected to the abutting portion (30); A third driving mechanism, which is arranged in the box body (1) and is connected to the other end of the connecting rod (31). The third driving mechanism is used for driving the abutting portion (30) to approach or move away from the interior trim leather (5), and is also used for driving the abutting portion (30) to make a reciprocating motion at a certain frequency.

2. The interior leather sewing fatigue simulation device according to claim 1, characterized in that: An insertion opening is provided on one wall surface of the box body (1), and the partition plate (10) is inserted into the insertion opening.

3. The interior trim leather sewing fatigue simulation device according to claim 2, wherein: A plugging groove corresponding to the position of the insertion opening is provided on another wall surface of the box body (1), and the plugging groove is adapted to the partition plate (10); And / or, a sealing member is further provided at the end of the partition plate (10) located inside the box body (1).

4. The interior leather sewing fatigue simulation device according to claim 1, wherein: The partition plate (10) is located in the inner space of the box body (1), and its top is rotatably connected to the top of the box body (1).

5. An interior leather sewing fatigue simulation method, characterized in that, It includes: Providing the interior leather sewing fatigue simulation device according to any one of claims 1 to 4; Clamping the interior leather (5) on the clamping device (2), and applying a chemical medium to the sewing line position of the interior leather (5); According to the set test working conditions, controlling the first driving mechanism, the force applying mechanism (3) and the temperature and humidity device (4) to perform corresponding actions; Taking it out and measuring the sewing strength of the interior leather (5) and the maximum diameter of the needle holes at the sewing line positions.

Images