A high damping vehicle rear wheel rear fender support structure and processing method thereof

Abstract

The present application discloses a high-damping rear wheel rear fender support structure for a vehicle and a processing method thereof, which includes a support, a tube beam, a core frame, a damping and vibration-reducing rubber layer and a glue welding layer. The tube beam and the core frame are pressed together, and the damping and vibration-reducing rubber is applied to the conical surface and the end of the core frame. The tube beam and the support are integrated by friction welding, and the inner diameter φ8 and the outer diameter φ7 of the support welding part match the inner diameter φ3 and the outer diameter φ4 of the tube beam. After the support and the tube beam are friction welded, the core frame of the present application is integrated with the support and the tube beam, which can improve the bearing capacity. In addition, the aluminum alloy core frame of the rear fender support adopting the friction welding structure has the function of cooling the high strain area.

Description

Technical Field

[0001] The present application relates to the technical field of processing the middle and rear axle wheels of medium and heavy commercial vehicles, and in particular to a high-damping vehicle rear wheel rear fender support structure and a processing method thereof. Background Art

[0002] Existing automobile fender bracket assembly structures and connection methods mainly include the following: the first is that the fender bracket tube and the support adopt a sleeve structure, and the connecting ends and the lap fillet welds of the two are welded together by a melting welding method; the second is that the fender bracket tube and the support adopt a butt joint structure, and the connecting ends of the two are welded together by a friction welding method; the third is that the fender bracket tube and the support adopt a sleeve structure, the support is bolted to clamp the fender bracket tube, and in order to ensure the reliability of the fender bracket assembly, the outer wall of the tube that is sleeved with the support is vulcanized or equipped with a rubber pad to achieve the purpose of vibration reduction.

[0003] In the related technology, a Chinese patent with publication number CN216546393U proposes a heavy-duty truck friction welding mudguard bracket, including a bracket body and a bracket mounting plate, the bracket mounting plate is located at one end of the bracket body, and shock-absorbing assemblies are arranged on the upper and lower sides of the bracket body, and the shock-absorbing assembly includes a sleeve block, a spring and a support block. A limit assembly is arranged on the outer surface of one end of the bracket body opposite to the bracket mounting plate, and the limit assembly can move left and right on the surface of the bracket body. The utility model is provided with a mounting ring, a connecting plate and a shock-absorbing assembly, and the connecting plate installed on the mounting ring is rotated to the surface of the bracket body, so that the shock-absorbing assembly is tightly attached to the surface of the bracket body, so that the vibration of the bracket body can be reduced when the mud guard contacts the sludge, thereby effectively preventing the risk of the bracket body breaking after a long period of vibration, and extending the service life of the bracket body.

[0004] In addition, there is a Chinese patent with publication number CN219544907U, which proposes a car fender bracket with a buffer structure, including a bracket, a plurality of clamps are arranged on the outer wall of the bracket, a plurality of bolt holes are arranged on the inner walls of the clamps, and a buffer assembly for buffering is arranged on the outer wall of the bracket. The utility model can buffer the bracket, reduce the probability of deformation, and thus increase the service life of the bracket.

[0005] With respect to the above-mentioned related technologies, the inventors believe that the following defects exist: in order to ensure the reliability of the rear fender bracket, a vibration reduction or buffer structure is generally added, which has a complex structure and a large dead weight; in addition, the rear fender bracket for the rear wheel of the vehicle generally adopts structures such as assembly buffer pads or vulcanized pipe ends, which have many processes and are relatively costly. Summary of the invention

[0006] In order to improve the quality problem of the rear fender bracket being easily cracked due to the vibration of the car when the car is driving under different road conditions, the present application provides a high-damping rear wheel rear fender bracket structure for a vehicle and a processing method thereof.

[0007] The present application provides a high damping vehicle rear wheel rear fender support structure adopts the following technical solution:

[0008] A high-damping rear wheel and rear fender support structure for a vehicle comprises a support, a tube beam, a core frame, a damping and vibration-reducing rubber layer and a welding layer. The tube beam and the core frame are pressed together, the damping and vibration-reducing rubber is coated on the conical surface and the end of the core frame, the tube beam and the support are integrated by friction welding, and the inner diameter φ8 and the outer diameter φ7 of the support welding portion match the inner diameter φ3 and the outer diameter φ4 of the tube beam.

[0009] Optionally, the tolerance of the inner diameter φ2 of the nested part of the tube beam is H7, the length of the nested part is L5, the tolerance of the outer diameter φ2 of the core frame is k6, and its length L9=L2+L3-0.5 (mm); the taper of the matching part between the core frame and the support at B is 1:10.

[0010] Optionally, a layer of 0.5-0.8 mm damping and vibration-reducing glue is applied on the matching conical surface B between the support and the core frame and the cylindrical surface with an outer diameter of φ10, and the components of the vibration-reducing glue are 30%wt of epoxy resin, 29.3%wt of talcum powder, 30wt% of plasticizer, 10wt% of foaming agent, and 0.7wt% of 300 mesh Zn powder.

[0011] The present application provides a method for processing a high damping vehicle rear wheel rear fender support structure using the following technical solution:

[0012] A method for processing a rear wheel rear fender support structure for a high damping vehicle comprises the following steps:

[0013] S1. Press the core frame into the pipe beam;

[0014] S2. Apply a layer of 0.5-0.8mm vibration-damping glue on the conical surface of the core frame and the φ10 cylindrical surface;

[0015] S3. The support and the pipe beam are welded by friction welding process to form a high damping rear fender bracket assembly, and a damping and vibration reduction adhesive layer and an adhesive welding layer are formed at the same time;

[0016] In S1, the core frame is made of an aluminum alloy round tube, and the tube beam is made of a cold-drawn steel tube of No. 35. The core frame is pressed into the tube beam by a pressing device. The pressing device includes a bracket, a fixing mechanism for fixing the tube beam, a driving mechanism for applying pressure to the core frame, an expansion mechanism for expanding the tube beam, and a marking mechanism for marking the core frame pressed into a specified position. The marking mechanism includes a shaping column and an adjustment component for positioning the movement position of the core frame. The shaping column is inserted into the core frame and is in clearance fit with the core frame. The expansion mechanism is arranged on the bracket.

[0017] Optionally, the adjustment component includes a support block fixed to the end of the shaping column, an adsorbent arranged on the inner wall of the tube beam, a plane mirror fixed to the adsorbent, an infrared emitter, an infrared receiver for receiving the signal of the infrared emitter, and a buzzer electrically connected to the infrared receiver. The infrared emitter and the infrared receiver are both arranged on the support block. The infrared emitter and the infrared receiver are both inclined and aligned with the plane mirror. The symmetry plane of the signal line emitted by the infrared emitter and the signal line received by the infrared receiver is coplanar with the symmetry plane of the plane mirror. The infrared receiver controls the movement of the driving mechanism.

[0018] Optionally, two adsorbents are provided, and the two adsorbents are symmetrically arranged with respect to the central axis of the tube beam. The two adsorbents are connected by a connecting piece. A hanging ring is fixedly connected to the bottom of the support block. A connection port is arranged at the position of the hanging ring closest to the connecting piece. The hanging ring is provided with an auxiliary component for automatically opening or closing the connection port at the position of the connection port.

[0019] Optionally, the auxiliary component includes two auxiliary rods and two auxiliary electromagnets. The hanging ring is provided with sliding grooves on both side walls of the connection port. The auxiliary rods are elastically arranged in the sliding grooves. The two auxiliary electromagnets are fixed to the inner wall of the sliding grooves and are used for adsorbing the auxiliary rods. A slope is arranged on the side of the auxiliary rod facing the connecting piece. The hanging ring moves towards the connecting piece until the connecting piece abuts against the slope.

[0020] Optionally, the expansion mechanism includes an expansion ring sleeved outside the tube beam, a plurality of heating tubes arranged in the expansion ring, a plurality of heating elements installed in the heating ring, and a temperature control component for improving the lubrication performance of the core frame. The expansion ring is provided with a plurality of heating holes, and the plurality of heating holes are equally spaced on the outside of the expansion ring. The inside of the expansion ring is a cavity and is used for oil bath heating of the tube beam. The heating tubes pass through the heating holes and part of them extend into the expansion ring. The connecting piece is divided into two sections and is connected by a tension sensor. The tension sensor is electrically connected to the heating element. The expansion ring is connected to the fixing mechanism.

[0021] Optionally, the driving mechanism includes a positioning ring for positioning and fixing the core frame, a power assembly for applying pressure to the core frame, and a pulling assembly for pulling out the shaping column, wherein one end of the shaping column close to the power assembly completely enters into the core frame, and the other end of the shaping column passes through the core frame.

[0022] Optionally, the temperature control component includes a hollow tube fixedly connected to the end of the heating tube away from the expansion ring, a softening tube elastically arranged on the hollow tube, and a supply part for adding lubricating oil to the outer wall of the core frame, the softening tube is filled with phase change material, the supply part outputs the lubricating oil to the inside of the positioning ring and between the outer wall of the core frame, the positioning ring is provided with a plurality of positioning holes, and the positioning holes correspond to the heating holes, the softening tube is connected to the hollow tube by a second electromagnet, and one end of the softening tube is inserted into the positioning hole during the sliding process of the softening tube in the hollow tube.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. After the core frame is friction welded with the support and the tube beam, the core frame, the support and the tube beam are integrated to improve the bearing capacity; on the premise that the reliability meets the technical requirements of the product, the wall thickness of the tube beam can be thinned, and the deadweight can be reduced by about 0.4Kg; by adding the core frame, a damping and shock-absorbing rubber layer is formed between the core frame and the support, and a glue welding layer is formed at B, the vibration damping performance is good, and the failure of the fender assembly caused by vibration can be eliminated; the rear fender bracket adopting this friction welding structure, the aluminum alloy core frame has the function of cooling the high strain area; the bearing capacity of the fender bracket is improved; the rear fender bracket of this friction welding structure can reduce the middle vibration damping pad and assembly bolts of the assembled rear fender bracket, thereby reducing the manufacturing cost;

[0025] 2. After aligning the core frame and the inner cavity of the tube beam, the core frame is pushed toward the tube beam, and the shaping column also moves toward the tube beam. At the same time, the infrared transmitter starts to send a signal line until it moves to the position of the plane mirror. At this time, the core frame moves to the specified position. At this time, the infrared receiver receives the signal of the infrared transmitter under the emission of the plane, and the infrared receiver triggers the buzzer to sound. Similarly, the infrared receiver and the power part are connected through the control of the PLC controller, and the power part stops pushing the core frame, completing the work of pressing the core frame into the specified position in the tube beam;

[0026] 3. The heating tube extends into the expansion ring after passing through the heating hole. The heating element in the heating tube heats the silicone oil in the expansion ring. Heat is transferred between the silicone oil and the pipe beam, which can cause the pipe beam to expand slightly. When the tension value on the tension sensor is greater than the initial value, it proves that the pipe beam has expanded slightly. Therefore, the heating of the heating element can be stopped. When the pipe beam expands, the core frame can be quickly pressed into the pipe beam; when the heating element stops heating, the electromagnet is powered off and separated from the softening tube. Under the action of the spring's elastic force to restore its original shape, the softening tube moves toward the positioning hole until one end of the softening tube is inserted into the positioning hole. As the lubricating oil is continuously pressed between the outer wall of the core frame and the inner wall of the positioning ring, the softening tube begins to release heat and heat the lubricating oil. After the lubricating oil is heated, it helps to fill the gap between the friction surfaces and form a more effective oil film, thereby improving the lubrication effect, which is further conducive to the core frame being pressed into the pipe beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the present application;

[0028] Figure 2 Schematic diagram of a tube beam according to Embodiment 1 of the present application;

[0029] Figure 3 is a schematic diagram of a support according to Embodiment 1 of the present application;

[0030] Figure 4 It is a schematic diagram of a core frame of the first embodiment of the present application;

[0031] Figure 5 yes Figure 1 The enlarged view of point A in the middle;

[0032] Figure 6 It is a schematic diagram of the overall structure of the second embodiment of the present application;

[0033] Figure 7 yes Figure 6 Enlarged view of point C in the middle;

[0034] Figure 8 yes Figure 6 Enlarged view of point D in the middle.

[0035] Figure numerals: 1, support; 2, pipe beam; 3, core frame; 4, damping and vibration reduction rubber layer; 5, adhesive welding layer; 6, bracket; 7, shaping column; 8, fixed semi-ring; 9, support block; 10, adsorption piece; 11, plane mirror; 12, infrared transmitter; 13, infrared receiver; 14, buzzer; 15, hanging ring; 16, connection port; 17, auxiliary rod; 18, auxiliary electromagnet; 19, slide groove; 20, elastic block; 21, elastic slot; 22, expansion ring; 23, heating tube; 24, heating element; 25, heating hole; 26, tension sensor; 27, positioning ring; 28, power block; 29, power element; 30, tension element; 31, tension ring; 32, hollow tube; 33, softening tube; 34, supply box; 35, supply pump; 36, supply tube; 37, positioning hole; 38, limiting block; 39, limiting slot; 40, second electromagnet; 41, connecting piece. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-8 This application is described in further detail. Embodiment 1

[0037] The present application embodiment discloses a high damping vehicle rear wheel rear fender support structure. Figure 1-Figure 5 A high damping rear wheel rear fender support structure for a vehicle includes a support 1, a tube beam 2, a core frame 3, a damping and vibration reduction rubber layer 4 and a glue welding layer 5. The tube beam 2 and the core frame 3 are pressed together, and the damping and vibration reduction rubber is coated on the conical surface and the end of the core frame 3. The tube beam 2 and the support 6 are integrated by friction welding. The inner diameter φ8 and the outer diameter φ7 of the support 1 at the welding point match the inner diameter φ3 and the outer diameter φ4 of the tube beam 2; the inner diameter φ2 tolerance of the nested part of the tube beam 2 is H7, and the length of the nested part is L5. The outer diameter φ2 tolerance of the core frame 3 is k6, and its length L9=L2+L3-0.5 (mm); the taper of the matching part between the core frame 3 and the support 1 at B is 1:10, the core frame 3 is deep cooled to -185±10℃, the deep cooling time is 6 to 8 minutes, and the core frame 3 is pressed into the tube beam 2; a layer of 0.5 to 0.8 mm damping and vibration reduction glue is applied on the matching conical surface B of the support 1 and the cylindrical surface with an outer diameter of φ10, and finally the support 1 and the tube beam 2 are welded to form a high-damping rear fender bracket 6 assembly, and a damping and shock-absorbing glue layer and a glue welding layer 5 are formed at the same time; the vibration-damping glue composition is 30%wt of epoxy resin, 29.3%wt of talcum powder, 30wt% of plasticizer, 10wt% of foaming agent, and 0.7wt% of 300-mesh Zn powder. Of course, the shock-absorbing glue in this embodiment can also be: 30%wt of epoxy resin, 27.2%wt of talcum powder, 30wt% of plasticizer, 12wt% of foaming agent, and 0.8wt% of 300-mesh Zn powder.

[0038] The implementation principle of a high-damping rear wheel rear fender bracket structure for a vehicle in an embodiment of the present application is as follows: after the core frame 3 is friction-welded to the support 1 and the tube beam 2, the core frame 3, the support 1 and the tube beam 2 are integrated to improve the bearing capacity; on the premise that the reliability meets the technical requirements of the product, the wall thickness of the tube beam 2 can be thinned, and the deadweight can be reduced by about 0.4 kg; by adding the core frame 3, and forming a damping and shock-absorbing rubber layer between the core frame 3 and the support 1, and forming a welded layer 5 at point B, the vibration damping performance is good, and the failure of the fender assembly caused by vibration can be eliminated; the rear fender bracket 6 of the friction welding structure is adopted, and the aluminum alloy core frame 3 has the function of cooling the high strain area; the bearing capacity of the fender bracket 6 is improved; the rear fender bracket 6 of the friction welding structure can reduce the middle vibration damping pad and assembly bolts of the assembled rear fender bracket 6, thereby reducing the manufacturing cost. Embodiment 2

[0039] The present application embodiment discloses a method for processing a high damping vehicle rear wheel rear fender support structure. Figure 6-Figure 8 A method for processing a high damping vehicle rear wheel rear fender support structure comprises the following steps:

[0040] S1, press the core frame 3 into the tube beam 2;

[0041] S2, apply a layer of 0.5-0.8mm vibration-damping glue on the conical surface of the core frame 3 and the cylindrical surface of φ10;

[0042] S3, using a friction welding process to weld the support 1 and the tube beam 2 to form a high-damping rear fender bracket 6 assembly, and at the same time forming a damping and vibration-reducing adhesive layer 4 and an adhesive welding layer 5;

[0043] Reference Figure 6-Figure 8In S1, the core frame 3 is made of aluminum alloy round tube, and the tube beam 2 is made of 35# cold drawn steel tube. The core frame 3 is pressed into the tube beam 2 by a crimping device. The crimping device includes a bracket 6, a fixing mechanism for fixing the tube beam 2, a driving mechanism for applying pressure to the core frame 3, an expansion mechanism for expanding the tube beam 2, and an identification mechanism for marking that the core frame 3 is pressed into a specified position. The fixing mechanism includes two fixing half rings 8 fixedly connected to the bracket 6. In the initial state, the two fixing half rings 8 fix the tube beam 2. The core frame 3 is clamped and fixed, thereby achieving the effect on the tube beam 2, and then the core frame 3 is pressed into the tube beam 2 through the driving mechanism. During the pressing process, the expansion mechanism is used to heat the tube beam 2, so that the tube beam 2 expands slightly, which makes it easier for the core frame 3 to be pressed into the tube beam 2, and the marking mechanism is used to mark the core frame 3 pressed into the specified position; assuming that the original inner diameter of the No. 35 cold-drawn steel pipe is D (unit: m), and the temperature rises by ΔT (unit: °C), the expansion amount of the inner diameter ΔD (unit: m) can be calculated by the following formula: ΔD = α × D × ΔT; wherein α is the thermal expansion coefficient, and the corresponding value can be selected according to the specific temperature range; in this embodiment, only the tube beam 2 needs to be slightly expanded.

[0044] Reference Figure 6-Figure 7 The marking mechanism includes a shaping column 7 and an adjustment component for positioning the movement position of the core frame 3. The shaping column 7 is inserted into the core frame 3 and has a clearance fit with the core frame 3. The expansion mechanism is arranged on the bracket 6; the end of the shaping column 7 away from the pipe beam 2 is flush with the end of the core frame 3, and the other end of the shaping column 7 passes through the core frame 3. The adjustment component includes a support block 9 fixed to the end of the shaping column 7, an adsorbent 10 arranged on the inner wall of the pipe beam 2, a plane mirror 11 fixed to the adsorbent 10, an infrared transmitter 12, an infrared receiver 13 for receiving the signal of the infrared transmitter 12, and a buzzer 14 electrically connected to the infrared receiver 13. The end surface area of ​​the support block 9 is smaller than the end surface circular area of ​​the shaping column 7. The adsorbent 10 can be selected in this embodiment. Either a suction cup or an electromagnet can be used, but considering that the magnetism of cold steel is related to its own performance, when an electromagnet is selected in this embodiment, an iron sheet can also be adhered to the inner wall of the pipe beam 2. In this embodiment, a suction cup is preferred. The infrared transmitter 12 and the infrared receiver 13 are both arranged on the support block 9. The infrared transmitter 12 and the infrared receiver 13 are both inclined and aligned with the plane mirror 11. The signal line emitted by the infrared transmitter 12 and the symmetry plane of the signal line received by the infrared receiver 13 are coplanar with the symmetry plane of the plane mirror 11, that is, the angle between the signal line emitted by the infrared transmitter 12 and the infrared receiver 13 and the plane where the plane mirror 11 is located is 45°, and the infrared receiver 13 is connected to the buzzer 14 through a PLC controller.

[0045] The driving mechanism includes a positioning ring 27 for positioning and fixing the core frame 3, a power assembly for applying pressure to the core frame 3, and a pulling assembly for pulling out the shaping column 7. The shaping column 7 is completely inserted into the core frame 3 at one end close to the power assembly, and the other end of the shaping column 7 passes through the core frame 3. The positioning ring 27 is fixed on the bracket 6 and the positioning ring 27 is adapted to the core frame 3. The central axis of the positioning ring 27 is colinearly arranged with the central axis of the fixed half ring 8, thereby ensuring that the core frame 3 is aligned with the pipe beam 2. The power assembly includes a power piece 29 and a fixed part connected to the output end of the power piece 29. A power block 28 is fixedly connected, and a power piece 29 is an electric push rod. The surface of the power block 28 is fitted with the end of the core frame 3. The pulling assembly includes a tension piece 30 and two tension rings 31. The tension ring 31 is fixedly connected to the end of the shaping column 7, and the other tension ring 31 is fixedly connected to the output end of the tension piece 30. A mounting hole is provided in the center of the power block 28. The tension piece 30 and the tension ring 31 are respectively located on both sides of the power block 28. The tension piece 30 is fixed on the power block 28, and when the power block 28 squeezes the core frame 3, the relative positions of the two tension rings 31 will not separate.

[0046] After aligning the core frame 3 and the inner cavity of the tube beam 2, the core frame 3 is pushed toward the tube beam 2, and the shaping column 7 also moves toward the tube beam 2. At the same time, the infrared transmitter 12 starts to send a signal line until it moves to the position of the plane mirror 11. At this time, the core frame 3 moves to the specified position. At this time, the infrared receiver 13 receives the signal of the infrared transmitter 12 under the emission action of the plane, and the infrared receiver 13 triggers the buzzer 14 to make a sound. Similarly, the infrared receiver 13 and the power piece 29 are connected through the control of the PLC controller. The power piece 29 stops pushing the core frame 3 and completes the work of pressing the core frame 3 into the specified position in the tube beam 2.

[0047] Reference Figure 6-Figure 8In order to facilitate the core frame 3 to be pressed into the tube beam 2, the expansion mechanism includes an expansion ring 22 sleeved on the outside of the tube beam 2, a plurality of heating tubes 23 arranged in the expansion ring 22, a plurality of heating elements 24 installed in the heating ring, and a temperature control component for improving the lubrication performance of the core frame 3. The expansion ring 22 is connected to the fixed connection, that is, the expansion ring 22 is fixed between the two fixed half rings 8. The inner diameter of the expansion ring 22 is larger than the outer diameter of the tube beam 2, and the difference is slightly larger than or equal to the expanded size of the tube beam 2. The expansion ring 22 is provided with a cavity and is used to perform oil bath heating on the tube beam 2. In the embodiment, since the thermal expansion coefficient of the tube beam 2 is within the range of 20-100°C, it expands slightly at 20-100°C. Therefore, it is necessary to use high-temperature resistant silicone oil as the heat transfer medium, and its maximum temperature can reach 280-330°C. The heating element 24 in this embodiment uses an electric heating wire. The heating tube 23 passes through the heating hole 25 and extends into the expansion ring 22. The heating element 24 in the heating tube 23 heats the silicone oil in the expansion ring 22, and heat is transferred between the silicone oil and the tube beam 2, so that the tube beam 2 can expand slightly.

[0048] There are two adsorption members 10, and the two adsorption members 10 are symmetrically arranged relative to the central axis of the pipe beam 2. The two adsorption members 10 are connected by a connecting member 41, and the connecting member 41 can be made of a steel wire rope. The connecting member 41 is divided into two sections and is connected by a tension sensor 26. The tension value of the tension sensor 26 after the two adsorption members 10 are firmly fixed to the inner wall of the pipe beam 2 is the trigger value. As long as the tension value on the tension sensor 26 is greater than the initial value, it proves that the pipe beam 2 expands slightly, so the heating of the heating member 24 can be stopped. When the pipe beam 2 expands, the core frame 3 can be quickly pressed into the pipe beam 2.

[0049] Reference Figure 6-Figure 8The temperature control component includes a hollow tube 32 fixedly connected to the end of the heating tube 23 away from the expansion ring 22, a softening tube 33 elastically arranged with the hollow tube 32, and a supply part for adding lubricating oil to the outer wall of the core frame 3. Both ends of the hollow tube 32 are open, and the hollow tube 32 is located outside the expansion ring 22. The outer wall of the softening tube 33 is fixedly connected with a slider. The inner wall of the hollow tube 32 is provided with a limiting groove 39 for limiting the sliding of the block 38. Both ends of the limiting groove 39 in the length direction are closed. Either end of the limiting block 38 is connected to the slide groove 19. A spring is fixedly connected between the corresponding ends. When the softening tube 33 abuts against the end of the heating end, the spring is in a state of pulling the rope. The softening tube 33 is filled with a phase change material, which can absorb or release heat. The positioning ring 27 is provided with a plurality of positioning holes 37, which are symmetrically arranged relative to the central axis of the positioning ring 27. The positioning holes 37 correspond to the heating holes 25, and in the initial state, one end of the softening tube 33 does not enter the positioning hole 37. The softening tube 33 is fixedly connected to the hollow tube 32 through the second electromagnet 40. The inner wall of the hollow tube 32 is provided with a softening hole, and the second electromagnet 40 is installed in the softening hole, and the electromagnet is adsorbed on the outer wall of the softening tube 33. When the heating element 24 stops heating, the second electromagnet 40 is powered off and separated from the softening tube 33. Under the elastic force of the spring to restore the original shape, the softening tube 33 moves toward the positioning hole 37 until one end of the softening tube 33 is inserted into the positioning hole 37. The supply part includes a supply box 34, a supply pipe 36 and a supply pump 35. One end of the supply pipe 36 is connected to the output end of the supply pump 35. The supply pump 35 5 is installed in the supply box 34, and the supply box 34 is filled with lubricating oil. The supply pipe 36 is fixedly connected to the positioning ring 27, and the positioning ring 27 is provided with a supply hole. The supply pipe 36 fits with the outer wall of the core frame 3 after passing through the supply hole. As the lubricating oil is continuously pressed into the space between the outer wall of the core frame 3 and the inner wall of the positioning ring 27, the softening pipe 33 starts to release heat and heat the lubricating oil. The heated lubricating oil helps to fill the gap between the friction surfaces and form a more effective oil film, thereby improving the lubrication effect, and further facilitating the core frame 3 to be pressed into the tube beam 2.

[0050] In order to remove the adsorption member 10 and the plane mirror 11 from the pipe beam 2, a hanging ring 15 is fixedly connected to the bottom of the support block 9, and a connecting port 16 is provided at the position of the hanging ring 15 closest to the connecting member 41. The hanging ring 15 is provided with an auxiliary component for opening or closing the connecting port 16 at the position of the connecting port 16, and the auxiliary component includes two auxiliary rods 17 and two auxiliary electromagnets 18. The hanging ring 15 is provided with slide grooves 19 on both sides of the connecting port 16. The auxiliary rod 17 is elastically arranged in the slide groove 19, and an elastic block 20 is fixedly connected to the side wall of the auxiliary rod 17. The side wall of the slide groove 19 is provided with an elastic groove 21, and both ends of the elastic groove 21 are closed. A spring is fixedly connected between one end of the elastic block 20 and the corresponding end of the elastic groove 21. The two auxiliary electromagnets 18 are respectively fixed to the inner walls of the ends of the two slide grooves 19, and avoidance grooves are provided in the two slide grooves 19. The auxiliary electromagnet 18 is fixed in the avoidance groove and is connected to the auxiliary The side wall of the auxiliary rod 17 is adsorbed; an inclined surface is provided at one end of the auxiliary rod 17 facing the connecting piece 41. During the movement of the core frame 3 toward the specified position, the hanging ring 15 moves toward the connecting piece 41 until the connecting piece 41 abuts against the inclined surface. The connecting piece 41 exerts an action on the auxiliary rod 17 to move toward the slide groove 19. At this time, the two auxiliary rods 17 are separated. After the connecting piece 41 enters the hanging ring 15, under the elastic force of the spring, the ends of the two auxiliary rods 17 abut against each other. At this time, the auxiliary electromagnet 18 adsorbs the auxiliary rod 17. When the pressing work of the core frame 3 is completed, the shaping column 7 is pulled out of the core frame 3 through the cooperation of the tension piece 30 and the two tension rings 31. Under the action of the two auxiliary rods 17 on the connecting piece 41, the tension sensor 26 is not turned on. As the shaping column 7 is pulled out of the core frame 3, the connecting piece 41 pulls the adsorption piece 10 out of the inner wall of the pipe beam 2 to realize the recovery of the plane mirror 11.

[0051] The implementation principle of the processing method of a high-damping rear wheel rear fender bracket structure for a vehicle in the embodiment of the present application is as follows: the heating tube 23 passes through the heating hole 25 and then extends into the expansion ring 22, and the heating element 24 in the heating tube 23 heats the silicone oil in the expansion ring 22, and heat is transferred between the silicone oil and the tube beam 2, so that the tube beam 2 can expand slightly. When the tension value on the tension sensor 26 is greater than the initial value, it proves that the tube beam 2 has expanded slightly, so the heating of the heating element 24 can be stopped. When the tube beam 2 expands, the core frame 3 can be quickly pressed into the tube beam 2. When the heating element 24 stops heating, the second electromagnet 40 is powered off and separated from the softening tube 33. Under the action of the spring's elastic force to restore its original shape, the softening tube 33 moves toward the positioning hole 37 until one end of the softening tube 33 is inserted into the positioning hole 37. As the lubricating oil is continuously pressed between the outer wall of the core frame 3 and the inner wall of the positioning ring 27, the softening tube 33 begins to release heat and heat the lubricating oil. After the lubricating oil is heated, it helps to fill the gap between the friction surfaces and form a more effective oil film, thereby improving the lubrication effect, which is further beneficial for the core frame 3 to be pressed into the tube beam 2.

[0052] After aligning the core frame 3 and the inner cavity of the tube beam 2, the core frame 3 is pushed toward the tube beam 2, and the shaping column 7 also moves toward the tube beam 2. At the same time, the infrared transmitter 12 starts to send a signal line until it moves to the position of the plane mirror 11. At this time, the core frame 3 moves to the specified position. At this time, the infrared receiver 13 receives the signal of the infrared transmitter 12 under the emission action of the plane, and the infrared receiver 13 triggers the buzzer 14 to make a sound. Similarly, the infrared receiver 13 and the power piece 29 are connected through the control of the PLC controller. The power piece 29 stops pushing the core frame 3 and completes the work of pressing the core frame 3 into the specified position in the tube beam 2.

[0053] During the movement of the core frame 3 toward the specified position, the hanging ring 15 moves toward the connecting piece 41 until the connecting piece 41 abuts against the inclined surface. The connecting piece 41 exerts an action on the auxiliary rod 17 to move toward the slide groove 19. At this time, the two auxiliary rods 17 are separated. After the connecting piece 41 enters the hanging ring 15, under the elastic force of the spring, the ends of the two auxiliary rods 17 abut against each other. At this time, the auxiliary electromagnet 18 adsorbs the auxiliary rod 17. When the pressing work of the core frame 3 is completed, the shaping column 7 is pulled out of the core frame 3 through the cooperation of the tension piece 30 and the two tension rings 31. Under the action of the two auxiliary rods 17 on the connecting piece 41, the tension sensor 26 is not turned on. As the shaping column 7 is pulled out of the core frame 3, the connecting piece 41 pulls the adsorption piece 10 out from the inner wall of the pipe beam 2 to realize the recovery of the plane mirror 11.

[0054] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method for processing a rear wheel rear fender support structure for a high damping vehicle, used for processing a rear wheel rear fender support structure for a high damping vehicle, the rear wheel rear fender support structure for a high damping vehicle comprising a support (1), a tube beam (2), a core frame (3), a damping and vibration reduction rubber layer (4) and a welding layer (5), the tube beam (2) and the core frame (3) are press-fitted into one, the damping and vibration reduction rubber is coated on the conical surface and end of the core frame (3), the tube beam (2) and the support (1) are integrated by friction welding, the inner diameter φ8 and the outer diameter φ7 of the support (1) at the welding point match the inner diameter φ3 and the outer diameter φ4 of the tube beam (2); Features: The steps include: S1, press-fitting the core frame (3) into the tube beam (2); S2. Apply a layer of 0.5-0.8mm vibration-damping glue on the conical surface of the core frame (3) and the cylindrical surface of φ10. S3, using a friction welding process to weld the support (1) and the tube beam (2) to form a high-damping rear fender bracket assembly, and at the same time forming a damping and vibration-reducing adhesive layer (4) and an adhesive welding layer (5); In S1, the core frame (3) is made of aluminum alloy round tube, and the tube beam (2) is made of No. 35 cold-drawn steel tube. The core frame (3) is pressed into the tube beam (2) by using a crimping device. The crimping device includes a bracket (6), a fixing mechanism for fixing the tube beam (2), a driving mechanism for applying pressure to the core frame (3), an expansion mechanism for expanding the tube beam (2), and an identification mechanism for marking that the core frame (3) is pressed into a specified position. The identification mechanism includes a shaping column (7) and an adjustment component for positioning the moving position of the core frame (3). The shaping column (7) is inserted into the core frame (3) and is clearance-matched with the core frame (3). The expansion mechanism is arranged on the bracket (6).

2. The method for processing a high damping vehicle rear wheel rear fender support structure according to claim 1, characterized in that: The inner diameter φ2 tolerance of the nested part of the tube beam (2) is H7, the length of the nested part is L5, the outer diameter φ2 tolerance of the core frame (3) is k6, and its length L9=L2+L3-0.5 mm; the taper of the matching part between the core frame (3) and the support (1) at point B is 1:

10.

3. The method for processing a high damping vehicle rear wheel rear fender support structure according to claim 1, characterized in that: A layer of 0.5-0.8 mm damping and vibration reduction glue is applied on the matching conical surface B of the support (1) and the core frame (3) and the cylindrical surface with an outer diameter of φ10. The damping and vibration reduction glue comprises 30%wt of epoxy resin, 29.3%wt of talcum powder, 30wt% of plasticizer, 10wt% of foaming agent, and 0.7wt% of 300 mesh Zn powder.

4. The method for processing a high damping vehicle rear wheel rear fender support structure according to claim 3, characterized in that: The adjustment component comprises a support block (9) fixed at the end of the shaping column (7), an adsorption member (10) arranged on the inner wall of the tube beam (2), a plane mirror (11) fixed on the adsorption member (10), an infrared transmitter (12), an infrared receiver (13) for receiving a signal from the infrared transmitter (12), and a buzzer (14) electrically connected to the infrared receiver (13). The infrared transmitter (12) and the infrared receiver (13) are both arranged on the support block (9). The infrared transmitter (12) and the infrared receiver (13) are both arranged at an angle and aligned with the plane mirror (11). The symmetric planes of the signal line emitted by the infrared transmitter (12) and the signal line received by the infrared receiver (13) are coplanar with the symmetric plane of the plane mirror (11). The infrared receiver (13) controls the movement of the driving mechanism.

5. The method for processing a high damping vehicle rear wheel rear fender support structure according to claim 4, characterized in that: The adsorption components (10) are provided in two numbers, and the two adsorption components (10) are symmetrically arranged relative to the central axis of the tubular beam (2), the two adsorption components (10) are connected via a connecting component (41), a hanging ring (15) is fixedly connected to the bottom of the support block (9), a connecting port (16) is provided at a position of the hanging ring (15) closest to the connecting component (41), and an auxiliary component for automatically opening or closing the connecting port (16) is provided at the position of the connecting port (16) of the hanging ring (15).

6. The method for processing a high damping vehicle rear wheel rear fender support structure according to claim 5, characterized in that: The auxiliary component comprises two auxiliary rods (17) and two auxiliary electromagnets (18); the hanging ring (15) is provided with slide grooves (19) on both side walls of the connecting port (16); the auxiliary rod (17) is elastically arranged in the slide groove (19); the two auxiliary electromagnets (18) are fixed on the inner wall of the slide groove (19) and are used to adsorb the auxiliary rod (17); the auxiliary rod (17) is provided with an inclined surface on one side facing the connecting member (41); the hanging ring (15) moves toward the connecting member (41) until the connecting member (41) abuts against the inclined surface.

7. The method for processing a high damping vehicle rear wheel rear fender support structure according to claim 6, characterized in that: The expansion mechanism comprises an expansion ring (22) sleeved on the outside of the tube beam (2), a plurality of heating tubes (23) arranged in the expansion ring (22), a plurality of heating elements (24) installed in the heating tube (23), and a temperature control component for improving the lubrication performance of the core frame (3); the expansion ring (22) is provided with a plurality of heating holes (25), and the plurality of heating holes (25) are evenly spaced and distributed outside the expansion ring (22); the expansion ring (22) is provided with a cavity and is used for oil bath heating of the tube beam (2); the heating tube (23) passes through the inner part of the heating hole (25) and extends into the expansion ring (22); the connecting member (41) is divided into two sections and is connected by a tension sensor (26); the tension sensor (26) is electrically connected to the heating element (24); and the expansion ring (22) is connected to the fixing mechanism.

8. The method for processing a high damping vehicle rear wheel rear fender support structure according to claim 7, characterized in that: The driving mechanism comprises a positioning ring (27) for positioning and fixing the core frame (3), a power assembly for applying pressure to the core frame (3), and a pulling assembly for pulling out the shaping column (7); one end of the shaping column (7) close to the power assembly completely enters the core frame (3), and the other end of the shaping column (7) passes through the core frame (3).

9. The method for processing a high damping vehicle rear wheel rear fender support structure according to claim 8, characterized in that: The temperature control component comprises a hollow tube (32) fixedly connected to the end of the heating tube (23) away from the expansion ring (22), a softening tube (33) elastically arranged with the hollow tube (32), and a supply part for adding lubricating oil to the outer wall of the core frame (3), wherein the softening tube (33) is filled with phase change material, and the supply part outputs the lubricating oil to the interior of the positioning ring (27) and between the outer wall of the core frame (3), the positioning ring (27) is provided with a plurality of positioning holes (37), and the positioning holes (37) correspond to the heating holes (25), the softening tube (33) is connected to the hollow tube (32) via a second electromagnet (40), and one end of the softening tube (33) is inserted into the positioning hole (37) during the sliding process of the softening tube (33) in the hollow tube (32).

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