Rapid test method for simulating vehicle washing function of rear spoiler

Abstract

The invention discloses a rapid test method for simulating the car washing function of a rear spoiler, and the method comprises the steps: enabling the rear spoiler to be installed on a tail door metal plate, and enabling the tail door metal plate to be fixed on a support; the clamp is clamped at the force application part of the rear spoiler; adjusting the force application direction of the drawing and pressing machine to enable the force application direction to be parallel to the rear windshield; the pulling and pressing machine pushes the rear spoiler at the speed V1 until the force value reaches a first set threshold value F1; unloading until the force value is zero, and circularly executing N times; the pull-press machine pushes the rear spoiler until the force value reaches a second set threshold F2; and the state of the rear spoiler is detected. According to the invention, the high-pressure water gun test of the rear spoiler is converted into the pressure test by using the pull press machine, the limiting working condition of the rear spoiler during car washing can be effectively simulated by setting proper test parameters of the pressure test, and the car washing performance of the rear spoiler can be conveniently and quickly evaluated through quantitative data; the test time is saved, water resources are saved, and the test cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of automobile spoilers, in particular to a rapid test method for simulating a car washing function of a rear spoiler. Background Art

[0002] At present, a large amount of dust will be deposited on the rear of the car during driving (especially hatchback cars). Therefore, for cars with spoilers installed on the tailgate, the rear spoiler is one of the key areas in the car washing process. Sometimes it will be impacted by a high-pressure water gun, which also puts forward high requirements on the function of the tailgate spoiler under extreme working conditions. However, if an ultra-high-pressure water gun is used for extreme working condition function testing, it will not only greatly waste water resources and test resources, but also have high test costs and cause greater safety hazards. At the same time, when using a high-pressure water gun, the spoiler is unevenly stressed, and it is impossible to accurately quantify and evaluate the car washing function of the rear spoiler, and the test results obtained lack reliability. Summary of the invention

[0003] In order to solve at least one of the above technical problems, the present invention provides a rapid test method for simulating the car washing function of a rear spoiler, which simulates the performance of the rear spoiler under extreme car washing conditions through a pressure test to save costs.

[0004] The present invention solves the technical problem by adopting the following technical solution:

[0005] A rapid test method for simulating a rear spoiler car wash function comprises the following steps:

[0006] Step 100: Install the rear spoiler on the tailgate sheet metal, and fix the tailgate sheet metal on the bracket;

[0007] Step 200, clamping the fixture at the force application position of the rear spoiler;

[0008] Step 300, adjusting the force direction of the pulling press so that the force direction is parallel to the rear windshield;

[0009] Step 400, the pulling press pushes the rear spoiler at a speed V1 until the force value reaches a first set threshold F1; then unloads until the force value returns to 0, the speed V1 is set to one of 15-25 mm / s, and the first set threshold F1 is set to one of 600-800 N;

[0010] Step 500, looping step 400, the number of loops is N times, and the number of loops N is set to one of 40-60 times;

[0011] Step 600, the pulling press pushes the rear spoiler until the force value reaches a second set threshold value F2, and the second set threshold value F2 is set to one of 1500-2500N;

[0012] Step 700: Detect the status of the rear spoiler.

[0013] Further, the speed V1 is set to one of 18-22 mm / s; the first set threshold F1 is set to one of 720-780 N; the number of cycles N is set to one of 50-60 times; and the second set threshold F2 is set to one of 1800-2200 N.

[0014] Further, in step 600, the pulling press pushes the rear spoiler at a speed V2 until the force value reaches a second set threshold F2; the speed V2 is set to one of 15-25 mm / s.

[0015] Further, the speed V2 is set to one of 18-22 mm / s.

[0016] Furthermore, the force application part of the rear spoiler is the part between the vertical plane S1 where the stationary point of the tail end contour curve of the rear spoiler is located and the vertical plane S2 at a distance L1 from the vertical plane S1. The distance L1 is set to 10-15mm, so that the load is loaded on the force concentrated part of the spoiler.

[0017] Further, the distance L1 is set to 10-12 mm.

[0018] Furthermore, the clamp is provided with a groove adapted to the center edge of the rear end of the rear spoiler. When the clamp is clamped at the force-applying position of the rear spoiler, the center edge of the rear end of the rear spoiler is stuck in the groove, so that the load is concentrated on the force-applying position.

[0019] Furthermore, the depth of the groove is 10-15 mm.

[0020] Furthermore, the depth of the groove is 10-12 mm.

[0021] Furthermore, the method for detecting the state of the rear spoiler is to observe whether the rear spoiler is loose or cracked.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] (1) The high-pressure water gun test of the rear spoiler is converted into a pressure test using a tensile press. By setting appropriate test parameters for the pressure test, the extreme working conditions of the rear spoiler during car washing can be effectively simulated. The quantitative data can be used to conveniently and quickly evaluate the car washing performance of the rear spoiler.

[0024] (2) Save test time, save water resources, and reduce test costs. The test fee is reduced from about 20,000 yuan to about 8,000 yuan. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to better understand the above and other purposes, features, advantages and functions of the present invention, reference may be made to the embodiments shown in the accompanying drawings. The same reference numerals in the accompanying drawings refer to the same components. It should be understood by those skilled in the art that the accompanying drawings are intended to schematically illustrate the preferred embodiments of the present invention and have no limiting effect on the scope of the present invention, and the components in the drawings are not drawn to scale.

[0026] Figure 1 It is a schematic diagram of the rapid test structure for simulating the car washing function of the rear spoiler of the present invention.

[0027] Figure 2 It is a force application schematic diagram of the rapid test method of simulating the car washing function of the rear spoiler of the present invention.

[0028] Figure 3 The figure is a schematic diagram of selecting the force application position of a general rear spoiler of the present invention.

[0029] Figure 4 The figure is a schematic diagram of selecting the force application position of the S-shaped rear spoiler of the present invention.

[0030] Figure 5 It is a schematic diagram of the fixture structure of a general rear spoiler of the present invention.

[0031] Figure 6 Schematic diagram of the fixture structure of the S-shaped rear spoiler.

[0032] In the figure: 1-rear spoiler; 11-bolt; 12-clip; 2-tailgate sheet metal; 3-pulling press; 4-clamp; 41-groove. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the exemplary embodiments of the present invention are described below in conjunction with the accompanying drawings, including various details of the embodiments of the present invention to facilitate understanding, which should be considered as merely exemplary. Therefore, it should be recognized by those of ordinary skill in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present disclosure. Similarly, for the sake of clarity and conciseness, the description of well-known functions and structures is omitted in the following description.

[0034] The present invention provides a rapid test method for simulating the car washing function of a rear spoiler, comprising the following steps:

[0035] Step 100, installing the rear spoiler 1 on the tailgate sheet metal 2, and fixing the tailgate sheet metal 2 on the bracket;

[0036] Step 200, clamping the fixture 4 at the force-applying position of the rear spoiler 1;

[0037] Step 300, adjusting the force direction of the pulling press 3 so that the force direction is parallel to the rear windshield;

[0038] Step 400, the pulling press 3 pushes the rear spoiler 1 at a speed V1 until the force value reaches a first set threshold F1; then unloads until the force value returns to 0, the speed V1 is set to one of 15-25 mm / s, and the first set threshold F1 is set to one of 600-800 N;

[0039] Step 500, looping step 400, the number of loops is N times, and the number of loops N is set to one of 40-60 times;

[0040] Step 600, the pulling press 3 pushes the rear spoiler 1 until the force value reaches a second set threshold F2, and the second set threshold F2 is set to one of 1500-2500N;

[0041] Step 700: Detect the state of the rear spoiler 1.

[0042] The rear spoiler 1 is pushed by an electronic tensile press 3 to apply pressure to the rear spoiler 1, which can simulate the impact of water flow on the rear spoiler 1 during high-pressure car washing. During car washing, the high-pressure water gun often impacts the rear spoiler 1 in a direction parallel to the rear windshield. The main problem during high-pressure car washing is the looseness of the rear spoiler 1. Therefore, it is necessary to install the rear spoiler 1 on the tailgate sheet metal 2 and fix the tailgate sheet metal 2 on the bracket, that is, to perform a pressure test on the entire tailgate assembly. The bracket keeps the tailgate sheet metal 2 fixed to prevent the tailgate sheet metal 2 from being displaced when the rear spoiler 1 is pushed. Reference Figure 1 and Figure 2 As shown, the rear spoiler 1 is connected to the internal tailgate sheet metal 2 by bolts 11 and buckles 12, and a pressure F is applied to the rear spoiler 1 in a direction parallel to the rear windshield. At this time, the bolts 11 and buckles 12 are subjected to a large shear force. Step 300 can simulate the water flow impact direction of the extreme working condition when washing a car, so that the force direction of the pulling press 3 is basically consistent with the water flow impact direction of the extreme working condition, making the rear spoiler 1 easier to loosen.

[0043] When washing a car with a high-pressure water gun, the water pressure and distance of the high-pressure water gun will affect the impact force on the rear spoiler 1. In order to make the state of the rear spoiler 1 after the test by the tension and pressure machine 3 consistent with the state after high-pressure washing, the force value on the rear spoiler 1 during the high-pressure washing process can be used as the test load limit value, and the state of the rear spoiler 1 loaded to the test load limit value by the tension and pressure tester can be used to simulate the performance of the rear spoiler 1 under the extreme conditions of car washing. A pressure sensor is set on the rear spoiler 1, and the pressure value detected by the pressure sensor using the high-pressure water gun impact is shown in Table 1:

[0044] Table 1 Pressure on rear spoiler 1 during high pressure water gun test

[0045]

[0046] As can be seen from Table 1, the first set threshold F1 in step 400 is set to one of 600-800N, which can simulate the impact force of the high-pressure water gun being 30cm away from the rear spoiler 1 and the water outlet pressure being between 80-90bar. When the high-pressure water gun is 30cm away from the rear spoiler 1, the car is swung to wash, and the same position of the rear spoiler 1 is washed once in about 10s, and the same position is washed about 40-50 times. The test piece loading speed V1 is set to one of 15-25mm / s, and a test can be completed in about 10s. The number of cycles N in step 500 is set to one of 40-60 times, which can simulate the number of times the same position is washed. When unloading, it can also be unloaded at speed V1. In this way, steps 400 and 500 can simulate the working condition when the high-pressure water gun is far away from the rear spoiler 1 during high-pressure car washing. In step 600, the second set threshold F2 is set to one of 1500-2500N, which can simulate the impact force of the high-pressure water gun being 10 cm away from the rear spoiler 1 and the water outlet pressure being between 80-90 bar. In this way, step 600 can simulate the extreme working condition of the high-pressure water gun washing the rear spoiler 1 at close range during high-pressure car washing.

[0047] When simulating the working condition that the high-pressure water gun is far away from the rear spoiler 1, the pressure of the pulling press 3 is cyclically loaded, the speed V1 of the pulling press 3 is set to one of 15-25 mm / s, the first set threshold F1 of the load stop is set to one of 600-800 N, and the number of cycles N is set to one of 40-60 times. When simulating the working condition that the high-pressure water gun washes the rear spoiler 1 at a close distance, the second set threshold F2 of the load stop is set to one of 1500-2500 N. The pulling press 3 can push the rear spoiler 1 at the speed V2 until the force value reaches the second set threshold F2, so that the pressure is stably loaded and the consistency of the test is maintained. The speed V2 can be set to one of 15-25 mm / s. Preferably, the speed V1 is set to one of 18-22 mm / s; the first set threshold F1 is set to one of 720-780 N; the number of cycles N is set to one of 50-60 times; the speed V2 is set to one of 18-22 mm / s; the second set threshold F2 is set to one of 1800-2200 N, and the state of the rear spoiler 1 can be detected under more stringent working conditions than when washing a car with a high-pressure water gun.

[0048] The speed V1 and the speed V2 can be set to 15mm / s, 16mm / s, 17mm / s, 18mm / s, 19mm / s, 20mm / s, 21mm / s, 22mm / s, 23mm / s, 24mm / s, 25mm / s, etc. The first set threshold F1 can be set to 600N, 620N, 650N, 680N, 700N, 720N, 750N, 780N, 800N, etc. The number of cycles N can be set to 40 times, 45 times, 50 times, 55 times, 60 times, etc. The second set threshold F2 can be set to 1500N, 1600N, 1700N, 1800N, 1900N, 2000N, 2100N, 2200N, 2300N, 2400N, 2500N, etc.

[0049] After the test is completed, the state of the rear spoiler 1 needs to be inspected. The rear spoiler 1 can be visually inspected for cracks and damage. The rear spoiler 1 can also be pushed to check for looseness.

[0050] refer to Figure 3 and Figure 4 As shown, during high-pressure car washing, the impact on the center edge of the rear end of the rear spoiler 1 is more concentrated. Therefore, the force application part of the rear spoiler 1 can be set to the part between the vertical plane S1 where the stationary point of the rear end contour curve of the rear spoiler 1 is located and the vertical plane S2 at a distance L1 from the vertical plane S1. The rear spoiler 1 is a symmetrical structure. Generally, the rear end contour of the rear spoiler 1 is an arc shape, such as Figure 3 As shown, the stationary point of the rear end contour curve of the rear spoiler 1 is the limit point A at the center of the contour curve. When the tension press 3 performs a pressure test, the force-bearing part of the rear spoiler 1 is generally the part between the vertical plane S1 where the limit point A is located and the vertical plane S2 that is offset from the plane S1 to the inside by a distance L1. The distance between the vertical plane S2 and the intersection point of the contour of the rear spoiler 1 is L2, that is, the force-applying part is the long strip-shaped part of the rear end of the rear spoiler 1 with a length of L2 and a width of L1. Figure 4 As shown, the tail end profile of the S-shaped rear spoiler 1 is wavy, and the stationary points of the tail end profile curve of the rear spoiler 1 include limit points B1 and B2 symmetrically arranged on both sides of the profile curve, and the two limit points are located on the same vertical plane. When the tensile press 3 performs a pressure test, the force-bearing part of the S-shaped rear spoiler 1 is the part between the vertical plane S1 where the limit points B1 and B2 are located and the vertical plane S2 where the plane S1 is offset inward by a distance L1. Similarly, the force-applying part is the long strip-shaped part of the tail of the rear spoiler 1 with a length of L2 and a width of L1.

[0051] Preferably, the distance L1 is set to 10-15 mm, more preferably, the distance L1 is set to 10-12 mm. The distance L1 can be set to 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, etc.

[0052] When the tension press 3 is loaded, the rear spoiler 1 is forced through the fixture 4, referring to Figure 1 , Figure 5 and Figure 6 As shown, the fixture 4 is provided with a groove 41 adapted to the center edge of the rear end of the rear spoiler 1. When the groove 41 of the fixture 4 is arc-shaped, it is suitable for the rear end profile of the general rear spoiler 1. When the groove 41 of the fixture 4 is wavy, it is suitable for the rear end profile of the S-type rear spoiler 1. When the fixture 4 is clamped at the force-applying part of the rear spoiler 1, the center edge of the rear end of the rear spoiler 1 is stuck in the groove 41, so that the tension press 3 can stably apply force to the rear spoiler 1, and the load can be concentrated on the force-applying part. Preferably, the depth of the groove 41 is 10-15mm, and more preferably, the depth of the groove 41 is 10-12mm. The depth of the groove 41 can be set to 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, etc., so that the load is loaded on the force-applying part of the rear spoiler 1.

[0053] The high-pressure water gun test of the rear spoiler 1 is converted into a pressure test using a tensile press 3. By setting appropriate test parameters of the pressure test, the extreme working conditions of the rear spoiler 1 during car washing can be effectively simulated. The car washing performance of the rear spoiler 1 can be conveniently and quickly evaluated through quantitative data. It can also save test time, save water resources, and reduce test costs. The test fee can be reduced from about 20,000 yuan to about 8,000 yuan.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A rapid test method for simulating the car washing function of a rear spoiler, characterized in that: The following steps are involved: Step 100: Install the rear spoiler on the tailgate sheet metal, and fix the tailgate sheet metal on the bracket; Step 200, clamping the fixture at the force application position of the rear spoiler; Step 300, adjusting the force direction of the pulling press so that the force direction is parallel to the rear windshield; Step 400, the pulling press pushes the rear spoiler at a speed V1 until the force value reaches a first set threshold F1; then unloads until the force value returns to 0, the speed V1 is set to one of 15-25 mm / s, and the first set threshold F1 is set to one of 600-800 N; Step 500, looping step 400, the number of loops is N times, and the number of loops N is set to one of 40-60 times; Step 600, the pulling press pushes the rear spoiler until the force value reaches a second set threshold value F2, and the second set threshold value F2 is set to one of 1500-2500N; Step 700: Detect the status of the rear spoiler.

2. The rapid test method for simulating the rear spoiler car washing function according to claim 1, characterized in that: The speed V1 is set to one of 18-22 mm / s; the first set threshold F1 is set to one of 720-780 N; the number of cycles N is set to one of 50-60 times; and the second set threshold F2 is set to one of 1800-2200 N.

3. The rapid test method for simulating the rear spoiler car washing function according to claim 1, characterized in that: In step 600, the pulling press pushes the rear spoiler at a speed V2 until the force value reaches a second set threshold F2; the speed V2 is set to one of 15-25 mm / s.

4. The rapid test method for simulating the rear spoiler car washing function according to claim 3, characterized in that: The speed V2 is set to one of 18-22 mm / s.

5. The rapid test method for simulating the rear spoiler car washing function according to claim 1, characterized in that: The force application part of the rear spoiler is a part between a vertical plane S1 where the stationary point of the rear end contour curve of the rear spoiler is located and a vertical plane S2 which is at a distance L1 from the vertical plane S1, and the distance L1 is set to 10-15 mm.

6. The rapid test method for simulating the rear spoiler car washing function according to claim 5, characterized in that: The distance L1 is set to 10-12 mm.

7. The rapid test method for simulating the rear spoiler car washing function according to claim 1, characterized in that: The clamp is provided with a groove matched with the center edge of the rear end of the rear spoiler. When the clamp is clamped at the force application position of the rear spoiler, the center edge of the rear end of the rear spoiler is stuck in the groove.

8. The rapid test method for simulating the rear spoiler car washing function according to claim 7, characterized in that: The depth of the groove is 10-15 mm.

9. The rapid test method for simulating the rear spoiler car washing function according to claim 8, characterized in that: The depth of the groove is 10-12 mm.

10. The rapid test method for simulating the rear spoiler car washing function according to claim 1, characterized in that: The method for testing the status of the rear spoiler is to observe whether the rear spoiler is loose or cracked.

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