Front and rear door trim assembly and processing technology thereof

Abstract

The invention discloses a front and rear door trim panel assembly and a machining process thereof, and relates to the technical field of automobile design and machining. The front door trim panel assembly and the rear door trim panel assembly are innovatively designed; and the defect of appearance surface shrinkage caused by the structure on the back of the front door exterior trimming panel is completely avoided. According to the appearance definition that the front door exterior trimming plate end turning edge is high-brightness black paint, meanwhile, the inner plate is integrated with the outer plate end turning edge, the black texture effect is designed on the turning edge to replace black paint, and the problem that paint cannot be effectively attached to the root of the turning edge is solved; the problems of welding bumps or infirm welding and the like of the front door trim and the rear door trim through a traditional ultrasonic puncture welding process are solved, and the full-rubber-block bonding process replaces manual rubber block bonding through an intelligent robot, so that the assembly efficiency is greatly improved, and the problem that the rubber blocks are mistakenly and neglected to be manually loaded is solved.

Description

Technical Field

[0001] The invention relates to the technical field of automobile design and processing, and in particular to a front and rear door trim panel assembly and a processing technology thereof. Background Art

[0002] In the past, car doors were often designed with anti-scratch strips with a black textured appearance, which were used to decorate with different body colors and contrast with various bright body paints, highlighting and embellishing the door area. In the past, the anti-scratch strips of car doors were generally in the shape of slender strips. However, in recent years, with the continuous improvement of the perceived quality requirements of the exterior of vehicle models and the continuous innovation of the appearance effects of new energy vehicles, the size of the anti-scratch strips of car doors has been increased, and styling features have been designed on the parts to form trim parts with clear contours and unique shapes. They are collectively referred to as door trim parts, and the high-gloss black paint appearance is used instead of the conventional black texture appearance in the appearance definition, which greatly improves the gloss effect and sensory quality of the vehicle model.

[0003] In the past, the anti-scratch strip parts with textures were matched with the door sheet metal, and were generally designed with a 0mm gap fit or interference fit to avoid loosening and abnormal noise at the parting line of the product under pressure. In addition, there is no paint at the parting line of the textured door exterior panel, and there are no defects such as paint burrs, and there is no problem of paint peeling due to long-term contact between the parting line and the door sheet metal. However, in pursuit of high-quality appearance requirements, the OEM changed the texture to high-gloss paint, and the problems of flash and burrs at the parting line of the door trim, paint peeling at the parting line, and paint peeling at the parting line of the door trim and the door sheet metal due to long-term contact are difficult to solve.

[0004] After the textured anti-scratch strip is changed to a large painted decorative panel, the texture can avoid shrinkage and other appearance defects. However, after the paint is changed, the corresponding position of the designed fixed connection structure is prone to shrinkage defects on the front of the painted outer panel, so the painted outer panel must be added with an inner panel, and the structure is designed on the inner panel part. The conventional connection method of the inner and outer panel parts is fixed by ultrasonic puncture welding, but ultrasonic puncture welding has the problem of bulging if the welding is too deep, and poor fastening strength if the welding is too shallow, and easy to desolder. As customers' requirements for appearance quality continue to increase, a more efficient process solution with no appearance risk is needed to solve it.

[0005] In addition, since the human eye can see the turnover at the end of the door trim panel after the door is opened, the turnover at the end of the trim panel also requires the appearance effect of black paint. However, if the turnover of the door trim panel is directly designed at the end of the trim panel, during the opening and rotation process of the door, the turnovers of the front and rear door trim panels will contact and interfere with each other. Therefore, the front and rear door trim panel assemblies need to be checked for the distance during door opening and closing in the design, and a reasonable position for the turnover of the door trim panel is designed and defined through this distance check. However, after the turnover of the door trim panel is retracted to avoid interference, it will directly overlap on the back of the door trim panel, resulting in inevitable structural shrinkage printing on the door trim panel, and there is no effective solution to completely solve this shrinkage printing from the mold and process. In addition, after the turnover of the door trim panel is retracted to avoid interference, the root of the turnover cannot effectively adhere to the paint. For this reason, we propose a front and rear door trim panel assembly and its processing technology. Summary of the Invention

[0006] The purpose of the present invention is to provide a front and rear door trim panel assembly and its processing technology to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above purpose, the present invention provides the following technical solutions: A front and rear door trim panel assembly includes a front outer door trim panel and a rear outer door trim panel. Inner side of the front outer door trim panel and the rear outer door trim panel are provided with a front door trim panel inner skeleton and a rear door trim panel inner skeleton, and further includes:

[0008] A bell mouth shape is arranged between the front and rear outer door trim panels and the body sheet metal. The upper ends of the front and rear outer door trim panels are provided with R corners. A door trim panel parting line is arranged between the front and rear outer door trim panels and the body sheet metal. A first protective part is arranged between the front and rear outer door trim panels and the body sheet metal to prevent the door trim panel parting line from directly contacting and abutting against the door sheet metal. On the front of the front door trim panel inner skeleton and the rear door trim panel inner skeleton, there are first bonding parts of the same specification size to bond with the back of the corresponding front and rear outer door trim panels. Second bonding parts for bonding are respectively arranged at the bottoms of the front and rear door trim panel inner skeletons. A fastening component is arranged between the front and rear outer door trim panel inner skeletons and the body sheet metal.

[0009] The first protective component includes felts fixed to the inner sides of the front outer door trim panel and the rear outer door trim panel, and when the front and rear outer door trim panel assemblies are assembled, they are attached to the door sheet metal through the felts.

[0010] The turnover arranged on the front door trim panel inner skeleton, while ensuring that the front and rear door trim panel assemblies do not interfere with each other during the opening and rotation process of the front and rear doors, avoids the shrinkage printing problem existing in arranging the turnover on the large surface of the front outer door trim panel, and at the same time can also show the black appearance effect required by the turnover of the front outer door trim panel.

[0011] The first adhesive member includes adhesive blocks arranged to bond the front surface of the inner frame of the front and rear door trim panels to the back surface of the corresponding outer panels of the front and rear door trim panels. There are multiple groups of the adhesive blocks with uniform sizes, and each group of the adhesive blocks is evenly distributed on the front surface of the inner frame of the front and rear door trim panels and at various corner positions of the inner frame of the front and rear door trim panels.

[0012] The second adhesive member includes 3M tapes fixed to the inner bottom of the inner frame of the front and rear door trim panels.

[0013] There are multiple groups of the fastening components, and the multiple groups of fastening components are evenly distributed between the inner frame of the front and rear door trim panels and the body sheet metal. The fastening components include fastening insertion holes formed in the inner frame of the front and rear door trim panels and the body sheet metal. The fastening insertion holes on the inner frame of the front and rear door trim panels and the body sheet metal correspond to each other and are fixedly connected by snap fasteners. The front end of the snap fastener is conically arranged.

[0014] A 3M adhesive block pasting process for the front and rear door trim panel assembly includes the following steps:

[0015] S1: Loading the inner frame of the front and rear door trim panels. The operator transports the qualified inner frames of the front and rear exterior door trim panels to the pasting fixture, accurately positions the inner frames of the door trim panels through structures such as the positioning surface and limiting surface on the fixture, and fixes the inner frames with a suction cup. During the transportation and installation process, the operator should wear protective supplies such as gloves to avoid contaminating the surface of the parts with hand oil, sweat, etc.

[0016] S2: After the inner frame of the front and rear door trim panels is fixed on the fixture, the operator applies a primer adhesion promoter at the positions where the 3M adhesive blocks are to be bonded to ensure effective bonding and fastening of the adhesive blocks.

[0017] S3: Conveying 3M adhesive blocks and grasping 3M adhesive blocks. There is a robot system inside the 3M adhesive block bonding workbench. There is a 3M adhesive block conveying system inside the workbench. The 3M adhesive blocks on the 3M adhesive block conveying system are alternately arranged on the tape, and the tape is wound around the conveying device. After the program is started, the 3M adhesive blocks are continuously conveyed by the tape conveying device, and the multi-claw suction cup at the end of the robot arm is used to suck the 3M adhesive blocks. An air source is connected behind each suction cup, and through pneumatic suction, the suction cup can rotate and change positions. The suction cup alternately rotates and sucks the 3M adhesive blocks at one time.

[0018] S4: Bonding and fixing the adhesive blocks: The robot moves to the first bonding point according to the planned path and sequentially pastes the 3M adhesive blocks, and slightly presses them to make the 3M adhesive blocks fully contact the inner frame of the front and rear door trim panels to ensure firm bonding. During the process of sucking and pasting the 3M adhesive blocks, the robot should maintain a stable movement speed and posture to avoid affecting the pasting quality due to vibration, shaking, etc.

[0019] S5: Quality inspection. After all the 3M adhesive blocks on the inner skeleton of the outer door trim are pasted, the robot stops running, and the operator checks and confirms the pasting position and quality.

[0020] S6: Product blanking. The qualified inner skeletons of the front and rear outer door trims are unloaded from the tooling fixture by the operator and transported to the next station for pressing the inner skeletons of the front and rear outer door trims with the front and rear outer door trims. After pressing by the pressing tooling, the firmly fixed front and rear door trim assemblies are finally formed.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] 1. For the innovative designed front and rear door trim assemblies of the present invention, through the flared shape of the front and rear door trim assemblies, the body sheet metal shields the parting line of the outer plates of the front and rear door trims, effectively avoiding the problems of the leakage of the parting line of the painted door trim and the poor quality of the parting line.

[0023] 2. For the innovative designed front and rear door trim assemblies of the present invention, through the felt assembled on the front and rear door trim assemblies fitting with the door sheet metal, it avoids the paint peeling off at the parting line of the outer door trim during driving, and the contact between the paint parting line and the painted body sheet metal, and the pressing abnormal sound.

[0024] 3. For the innovative designed front and rear door trim assemblies of the present invention, through the design of integrating the turning edge of the outer plate end on the inner plate, it completely avoids the appearance shrinkage defect caused by the structure on the back of the front outer door trim. For the appearance definition that the turning edge of the front outer door trim end is high-brightness black paint, it also simultaneously solves the problem that the paint cannot be effectively attached to the root of the turning edge by integrating the turning edge of the outer plate end on the inner plate and using the black texture effect of the turning edge design to replace the black paint.

[0025] 4. For the innovative designed front and rear door trim assemblies of the present invention, by setting adhesive blocks of the same specification size on the front of the inner skeleton of the front and rear outer door trims, and setting the same kind of adhesive blocks at the corner positions, it ensures the fixed connection function of the full-adhesive-block bonding of the front and rear door trims, and at the same time avoids the local warping and disconnection at the corner positions of the front and rear door trim assemblies. And it optimizes the connection structure between the inner and outer plates of the door trim, ensuring the dimensional compliance of the front and rear door trim assemblies with the body sheet metal.

[0026] 5. For the innovative designed front and rear door trim assemblies of the present invention, by innovatively designing a whole 3M tape at the bottom of the door trim assembly to bond and fix with the door sheet metal, it solves the problem that there is no fixed connection structure between the bottom of the door trim assembly and the door.

[0027] 6. For the innovative designed front and rear door trim assemblies of the present invention, by innovatively designing and developing a plastic buckle with a small occupied space, it solves the problem that the space distance between the conventional general plastic buckle and the inner door sheet metal is insufficient.

[0028] 7. The front and rear door exterior trim panel assemblies of the innovative design of the present invention solve the problems of bulging caused by too deep welding or welding detachment caused by too shallow welding in the conventional ultrasonic piercing welding of the inner and outer panels of the door trim panel through the innovative process plan of fully automatic bonding of 3M adhesive blocks by robots. This fully automatic 3M adhesive block bonding plan not only ensures the fastening force requirements of the inner and outer panels of the door trim panel assembly and the body size requirements, but also solves the problems of low assembly efficiency of manually assembling 3M adhesive blocks and manual misassembly or omission of 3M adhesive blocks. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall external shape structure of the present invention;

[0030] Figure 2 It is a schematic diagram of the bell mouth styling structure of the present invention;

[0031] Figure 3 It is a schematic diagram of the parting line structure of the door trim panel of the present invention;

[0032] Figure 4 It is a schematic diagram of the felt structure of the present invention;

[0033] Figure 5 It is a schematic diagram of the turning structure of the present invention;

[0034] Figure 6 It is a schematic diagram of the structure of the first bonding member, the 3M adhesive block, of the present invention;

[0035] Figure 7 It is a schematic diagram of the structure of the second bonding member, the 3M tape, of the present invention;

[0036] Figure 8 It is a schematic diagram of the fastening assembly of the present invention.

[0037] In the figure: 101, front door exterior trim panel; 102, rear door exterior trim panel; 2, parting line of the door trim panel; 3, felt; 4, turning; 5, 3M tape; 6, buckle; 7, 3M adhesive block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0039] Embodiment 1

[0040] Please refer to Figures 1 - 8, A front and rear door trim panel assembly shown in the figure, including a front outer door trim panel 101 and a rear outer door trim panel 102. Inner frames of the front door trim panel and the rear door trim panel are provided on the inner sides of the front outer door trim panel 101 and the rear outer door trim panel 102 respectively. It further includes:

[0041] A bell mouth shape provided between the front outer door trim panel 101 and the rear outer door trim panel 102 and the vehicle body sheet metal. R corners are provided at the upper ends of the front outer door trim panel 101 and the rear outer door trim panel 102. A door trim panel parting line 2 is provided between the front outer door trim panel 101 and the rear outer door trim panel 102 close to the vehicle body sheet metal. A first protective part is provided between the front outer door trim panel 101 and the rear outer door trim panel 102 and the vehicle body sheet metal to prevent the door trim panel parting line 2 from directly contacting and abutting against the door sheet metal. First bonding parts of the same specification size are provided on the fronts of the front door trim panel inner frame and the rear door trim panel inner frame to bond with the backs of the corresponding front and rear outer door trim panels. Second bonding parts for assisting bonding are respectively provided at the bottoms of the front and rear door trim panel inner frames. A fastening assembly for fastening is provided between the front and rear door trim panel inner frames and the vehicle body sheet metal;

[0042] If there is no effective shielding for the conventional parting line, the parting line will be exposed, with flash and burrs at the parting line, and the paint qualification rate is low; the paint at the parting line will come off due to long-term contact with the door sheet metal, and there will be abnormal noises during road tests at the parting line during driving. The position of the door trim panel parting line 2 is designed to be 1.0 mm - 2.0 mm beyond the R corner of the outer trim panel part, ensuring that the upper part of the parting line on the outer door trim panel is shielded by the bell mouth shape of the door sheet metal, preventing the parting line of the painted door trim panel from being exposed, and the flash and burrs at the parting line are visible. A gap of 0.5 mm is designed between the painted outer door trim panel and the door sheet metal.

[0043] Preferably, the first protective assembly includes a felt 3 fixed to the inner sides of the front outer door trim panel 101 and the rear outer door trim panel 102, and when the front outer door trim panel 101 and the rear outer door trim panel 102 assembly is assembled, it fits with the door sheet metal through the felt 3;

[0044] Install the felt 3 at the upper edge position of the inner skeleton of the outer door trim. The door trim assembly is attached to the door sheet metal through this felt 3 at the clearance fit position to avoid pressing noise. The thickness of the felt is 1.0 - 1.2 mm, ensuring that the thickness of the felt 3 after compression is controlled above 0.5 mm, which is greater than the designed 0.5 mm clearance between the outer door trim and the door sheet metal. Through the elastic deformation and thickness of this felt 3, it avoids the direct contact between the parting line of the outer door trim and the door sheet metal, thus avoiding the problem of paint peeling off due to long-term friction between the paint and the sheet metal at the parting line and the driving noise problem. Preferably, the flange provided on the inner skeleton of the front outer door trim, while ensuring that the front and rear door trim assemblies do not interfere with each other during the opening and rotation of the front and rear doors, avoids the shrinkage printing problem existing in arranging the flange on the large surface of the front outer door trim, and at the same time can also reflect the black appearance effect that the flange of the front outer door trim needs to show; to solve the problem that if the flange of the door trim is directly designed at the end position of the trim, during the opening and rotation of the door, the flanges of the front and rear door trims will contact and interfere, but after the flange of the door trim is retracted for avoidance, it will directly overlap on the back of the door trim, resulting in inevitable structural shrinkage printing on the door trim, and there is no effective solution to completely solve this shrinkage printing from the mold and process. In addition, after the flange of the door trim is retracted for avoidance, the distance between the flange and the edge is far, and the root cannot effectively adhere to the paint. Through the flange 4, it avoids the contact and interference between the flange 4 of the inner skeleton of the front door trim and the flange of the rear outer door trim during the opening and rotation of the door. At the same time, the end of the inner skeleton integrates the flange 4 of the outer panel, and there is no flange 4 on the outer panel. The outer panel avoids the shrinkage printing defect caused by the structure on the appearance surface. In addition, the integrated inner panel flange 4 is designed with a black texture effect to meet the color effect of the high-brightness black paint of the flange required by the vehicle manufacturer.

[0045] Preferably, the first bonding member includes glue blocks 7 arranged to bond the front and back surfaces of the inner skeletons of the front and rear door trims to the back surfaces of the corresponding front and rear door trim outer panels. There are multiple groups of glue blocks 7 and they are of the same size. Each group of glue blocks 7 is evenly distributed on the front surfaces of the inner skeletons of the front and rear door trims and at various corner positions of the inner skeletons of the front and rear door trims;

[0046] Due to the connection method between the inner and outer panels and the limited space of the body environment, it is difficult to meet the dimensional compliance of the assembly with the body. Moreover, there are warping, detachment, and poor dimensional stability at the edges and corners of the assembly. The inner frame of the front and rear door trim panels is bonded by rubber blocks 7. The rubber blocks 7 are arranged on the inner frame, and the sizes of the rubber blocks 7 are unified. The size of the rubber block 7 is unified to 30mm×15mm. One rubber block 7 is a fixed connection point between the inner and outer panels. The thickness dimension of the rubber block 7 is 1.0 - 1.1mm, ensuring the adhesiveness of the rubber block 7 and having a certain elastic compression amount. One rubber block 7 is designed within the range of 20mm at the boundary and corner areas of the inner frame parts of the front and rear door trim panels to avoid warping of the edges of the inner and outer panels and poor fitting of the edges of the inner and outer panels. The distance of each rubber block 7 from the upper edge of the inner frame of the door trim panel is designed within 5mm, ensuring good fixation of the upper edge of the inner and outer panel assembly after bonding and ensuring the dimensional compliance of the door trim panel assembly with the door. The rubber blocks 7 need to be arranged on both sides of the buckle seat where the inner frame is fixed to the door sheet metal, and the central distance between the rubber block 7 and the buckle seat needs to be designed within 20mm to ensure effective connection of the inner and outer panels. The distance between the rubber blocks 7 on the inner frame is designed to be less than 50mm to avoid loosening when pressing the area without rubber blocks 7, as well as severe product deformation, partial detachment of the door trim panel assembly, and large gaps.

[0047] The second bonding part includes a 3M tape 5 fixed to the inner bottom of the inner frame of the front and rear door trim panels;

[0048] To solve the problem that there is no fixed connection structure between the bottom of the front and rear door trim panel assemblies and the door, since the inner and outer door sheet metals need to be hemmed and welded at the bottom boundary position, it is impossible to open holes at the bottom boundary position. Opening holes will affect the overall strength and waterproof sealing effect of the bottom area of the inner and outer door sheet metals. The inability to open holes in the bottom area will cause the bottom area of the front and rear door trim panel assemblies to be unable to design plastic buckles to be fixedly connected to the door sheet metal. The bottom of the front and rear door trim panel assemblies will lack fastening and there is a risk of loosening and detachment. By innovatively designing a whole 3M tape 5 at the bottom of the front and rear door trim panel assemblies to be adhesively fixed to the door sheet metal, the problem of no fixed connection structure between the bottom of the front and rear door trim panel assemblies and the door is solved. The thickness of this tape is 1.0 - 1.1mm, ensuring the adhesive force and having a certain elastic compression amount. The width of this tape needs to be at least 10 - 12mm, and a certain width is required to ensure the overall bonding strength at the bottom of the trim panel. The bonding position of this tape needs to be designed near the hemming and welding of the inner and outer door sheet metals to ensure good adhesive fixation effect.

[0049] Preferably, multiple sets of fastening components are provided, and the multiple sets of fastening components are evenly distributed between the inner frame of the front and rear door trim panels and the body sheet metal. The fastening components include fastening insertion holes opened on the inner frame of the front and rear door trim panels and the body sheet metal. The fastening insertion holes on the inner frame of the front and rear door trim panels correspond to each other and are fixedly connected by a buckle 6. The front end of the buckle 6 is conical;

[0050] To solve the problem that when using conventional general - shaped plastic fasteners on the front and rear door trim panels, according to the door environment part data given by the vehicle manufacturer, and the outer panel shape and position of the door trim cannot be changed, the spatial distance between the plastic fasteners fixed to the inner part of the front and rear door trim panels and the inner door sheet metal is insufficient or even interferes. By compressing the overall height of the fastener 6, the effective height of the fastener 6 is reduced from the height of the general - shaped fastener of 20 mm to about 13 mm, increasing the space by about 7 mm, avoiding the problem of insufficient space between the door trim panel assembly and the body sheet metal and assembly interference. By designing this kind of small fastener 6, a safety distance of more than 3 mm between the fastener 6 and the inner body sheet metal is ensured; at the same time, while the height of the fastener 6 is reduced, the card - guiding slope and the card - connecting position of the fastener itself are optimized to ensure that the fastener 6 can meet the requirements of the assembly installation force and disassembly force of the plastic fastener.

[0051] A process for pasting 3M adhesive blocks on the front and rear door trim panels includes the following steps:

[0052] S1: Loading the inner skeletons of the front and rear door trim panels. The operator transports the qualified inner skeletons of the front and rear outer door trims to the pasting fixture. The inner skeletons of the door trim are accurately positioned through structures such as the positioning surface and the limiting surface on the fixture, and the inner skeletons are fixed by the suction cup. During the transportation and installation process, the operator should wear protective equipment such as gloves to avoid contaminating the surface of the parts with hand oil, sweat, etc.

[0053] S2: After the inner skeletons of the front and rear door trim panels are fixed on the fixture, the operator applies the primer adhesion promoter at the position of the bonding 3M adhesive block 7 to ensure the effective bonding and fastening of the adhesive block.

[0054] S3: Conveying and grasping the 3M adhesive block 7. There is a robot system inside the 3M adhesive block 7 bonding workbench, and a 3M adhesive block 7 conveying system is arranged inside the workbench. The 3M adhesive blocks 7 on the 3M adhesive block 7 conveying system are alternately arranged on the adhesive tape, and the adhesive tape is wound around the conveying device. After the program is started, the 3M adhesive blocks 7 are continuously conveyed by the adhesive tape conveying device, and the multi - claw suction cup at the end of the robot arm is used to suck the 3M adhesive block 7. An air source is connected behind the suction cup, and through pneumatic suction, the suction cup can rotate and change positions, and the suction cup alternately rotates and sucks the 3M adhesive block 7 at one time.

[0055] S4: Bonding and fixing the adhesive block: The robot moves to the first bonding point according to the planned path and then pastes the 3M adhesive block 7 in sequence and presses it slightly to make the 3M adhesive block 7 fully contact with the inner skeletons of the front and rear door trim panels to ensure firm bonding. During the process of sucking and pasting the 3M adhesive block 7, the robot should maintain a stable movement speed and posture to avoid affecting the pasting quality due to vibration, shaking, etc.

[0056] S5: Quality inspection. After the 3M adhesive blocks 7 are pasted on the inner skeleton of a vehicle door exterior trim panel, the robot stops running, and the operator checks and confirms the pasting position and quality.

[0057] S6: Product unloading. The operator unloads the qualified inner skeletons of the front and rear vehicle door exterior trim panels from the tooling fixture, transports them to the next station, and presses the inner skeletons of the front and rear door exterior trim panels against the front and rear door exterior trim panels. After being pressed by the pressing tooling, the firmly fixed front and rear door trim panel assemblies are finally formed.

[0058] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A front and rear door trim assembly, comprising: A front door exterior panel (101) and a rear door exterior panel (102), wherein the inner sides of the front door exterior panel (101) and the rear door exterior panel (102) are both provided with a front door interior panel frame and a rear door interior panel frame; It is characterized by further comprising: A trumpet-shaped shape is arranged between a front door exterior panel (101) and a rear door exterior panel (102) and a body sheet metal, wherein the upper ends of the front door exterior panel (101) and the rear door exterior panel (102) are provided with an R angle, a door panel parting line (2) is arranged between the front door exterior panel (101) and the rear door exterior panel (102) and the body sheet metal, a first protective member for preventing the door panel parting line (2) from directly contacting and abutting against the door sheet metal is arranged between the front door exterior panel (101) and the rear door exterior panel (102) and the body sheet metal, a first adhesive member of the same specification and size is arranged on the front side of the front door exterior panel inner frame and the rear door exterior panel inner frame to be bonded to the back side of the corresponding front and rear door exterior panels, a second adhesive member for auxiliary bonding is arranged at the bottom of the front and rear door exterior panel inner frames respectively, and a fastening component for fastening is arranged between the front and rear door exterior panel inner frames and the body sheet metal.

2. The front and rear door trim assembly according to claim 1, characterized in that: The first protection component comprises a felt (3) fixed to the inner side of the front door exterior panel (101) and the rear door exterior panel (102), and the front door exterior panel (101) and the rear door exterior panel (102) are bonded to the door sheet metal via the felt (3) when the front door exterior panel (101) and the rear door exterior panel (102) are assembled.

3. The front and rear door trim assembly according to claim 2, characterized in that: The flap (4) arranged on the inner frame of the front door exterior panel ensures that the front and rear door panels do not interfere with each other during the opening and rotation of the front and rear doors, while avoiding the shrinkage problem that exists when the flap (4) is arranged on a large surface of the front door exterior panel, and at the same time can also reflect the black appearance effect that the flap (4) of the front door exterior panel needs to show.

4. The front and rear door trim assembly according to claim 1, characterized in that: The first adhesive component comprises an adhesive block (7) arranged on the front side of the front and rear door trim inner frame and the back side of the corresponding front and rear door trim outer panel for bonding, wherein the adhesive blocks (7) are provided in multiple groups and are of uniform size, and each group of the adhesive blocks (7) is evenly distributed on the front side of the front and rear door trim inner frame and at each corner of the front and rear door trim inner frame.

5. The front and rear door trim assembly according to claim 1, characterized in that: The second adhesive component comprises a 3M adhesive tape (5) fixed to the bottom inner side of the inner frame of the front and rear door trim panels.

6. The front and rear door trim assembly according to claim 1, characterized in that: The fastening components are provided in multiple groups, and the multiple groups of fastening components are evenly distributed between the front and rear door trim inner frames and the body sheet metal. The fastening components include fastening sockets opened on the front and rear door trim inner frames and the body sheet metal. The front and rear door trim inner frames correspond to the fastening sockets on the body sheet metal and are fixed by snapping (6), and the front end of the snapping (6) is conical.

7. A 3M adhesive block gluing process for front and rear door trim assembly, applied to a front and rear door trim assembly as claimed in any one of claims 1 to 6, characterized in that: The following steps are involved: S1: Loading the inner frame of the front and rear door trim panels. The operator will carry the qualified inner frame of the front and rear door exterior trim panels to the pasting fixture, accurately position the inner frame of the door trim panel through the positioning surface, limit surface and other structures on the fixture, and fix the inner frame through the suction cup. During the handling and installation process, the operator should wear protective equipment such as gloves to prevent hand oil, sweat and other contamination of the part surface; S2: After the inner frame of the front and rear door trim panels is fixed on the fixture, the operator applies a primer to the location where the 3M adhesive block (7) is to be bonded to ensure that the adhesive block is effectively bonded and fastened; S3: 3M adhesive block (7) conveying and grabbing 3M adhesive block (7), a robot system is arranged inside the 3M adhesive block (7) bonding workbench, a 3M adhesive block (7) conveying system is arranged inside the workbench, 3M adhesive blocks (7) on the 3M adhesive block (7) conveying system are alternately arranged on the adhesive tape, the adhesive tape is wound on the conveying device, after the program is started, the adhesive tape conveying device continuously conveys the 3M adhesive block (7), and the multi-claw suction cup at the end of the robot arm sucks the 3M adhesive block (7), the suction cup is connected to an air source behind, and the suction cup can rotate and change position through pneumatic suction, and the suction cup rotates alternately to suck the 3M adhesive block (7) at one time; S4: Adhesive block bonding and fixing: The robot moves to the first bonding point along the planned path and then sequentially bonds the 3M adhesive block (7) and applies slight pressure to ensure that the 3M adhesive block (7) is in full contact with the inner frame of the front and rear door trim panels to ensure a firm bond. During the process of absorbing and bonding the 3M adhesive block (7), the robot should maintain a stable movement speed and posture to avoid vibration, shaking, etc. that may affect the bonding quality. S5: Quality inspection: after all 3M adhesive blocks (7) are pasted on the inner frame of a door exterior panel, the robot stops running and the operator checks and confirms the pasting position and pasting quality; S6: Product unloading. The qualified front and rear door exterior panel inner frames are unloaded from the fixture by the operator and moved to the next station for pressing of the front and rear door exterior panel inner frames with the front and rear door exterior panels. After pressing by the pressing tool, a fixed and firmly fixed front and rear door panel assembly is finally formed.

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