Automobile door cover pressing machine and pressing method thereof

Abstract

The present application relates to the field of automobile door cover inner and outer plate hemming, in particular to a kind of automobile door cover press bonding special machine and its press bonding method.Automobile door cover press bonding special machine is composed of base frame structure, bottom die system, pressing system, press bonding unit and electrical control system.Pressing system, bottom die system and press bonding unit are all installed on base frame structure, positioning reference is same, dimensional accuracy is high, and respectively connected with electrical control system and controlled.In the whole process, the position of bottom die is fixed, and the process design of pre-press bonding and final press bonding is realized by press bonding unit.Press bonding unit adopts modular design, reduces spare parts type, and each module in press bonding unit can be adjusted installation angle to adapt complex part modeling, each press bonding module acts independently, and stability is high.Pressing system adopts variable frequency motor to drive integral pressing plate to overturn through connecting rod structure, to realize the switching between opening position and pressing position.

Description

Technical Field

[0001] This invention relates to the field of edge banding technology for the inner and outer panels of a car body-in-white door cover, and specifically to a special machine for pressing automotive door covers and its pressing method. Background Technology

[0002] Currently, in major automotive body-in-white door and hood production lines, specialized lamination technology is widely used in the edge-sealing connection of inner and outer panels of body-in-white doors and hoods. It offers advantages such as stable process and high production speed, and is mainly applied to components such as left and right front doors, left and right rear doors, front hoods, and rear hoods. However, existing specialized lamination machines for doors and hoods are expensive, creating an urgent need for a low-cost, highly stable, high-precision lamination machine that produces high-quality molding. Summary of the Invention

[0003] To solve the above-mentioned technical problems, the present invention provides a special pressing machine with high stability, high precision, high working efficiency and good product molding quality.

[0004] The technical solution adopted in this invention is as follows:

[0005] On the one hand, a special machine for pressing automotive door covers is provided, including a base frame structure, a bottom mold system, a pressing system, and a pressing unit;

[0006] The base frame structure is fixed on the foundation, and the bottom mold system, the pressing system, and the pressing unit are all installed on the base frame structure; during operation, the positions of the bottom mold system and the base frame structure are fixed.

[0007] The pressing unit consists of multiple individually operating pressing modules, each arranged around the bottom mold system. Each pressing module includes a fixed frame, a vertical sliding group, a horizontal sliding group, and an insert assembly connected in sequence. The fixed frame is fixed to the base frame structure. The vertical sliding group and the horizontal sliding group can respectively drive the insert assembly to move in the vertical and horizontal directions. The insert assembly includes a final pressing insert and a pre-pressing insert located below it.

[0008] The pressing system includes a pressing column, a flipping unit, a vertical lifting unit, and a pressing plate. The pressing column is fixed on the base frame structure. The flipping unit is installed on the pressing column. The vertical lifting unit is installed on the flipping unit. The pressing plate is connected to the vertical lifting unit and is located above the bottom mold system.

[0009] Furthermore, the base frame structure includes an integral base plate, multiple base columns, a Base plate, and a bottom mold mounting seat. The integral base plate is fixed on the foundation, the lower end of the base columns is fixed on the integral base plate, the upper end of the base columns is fixedly connected to the Base plate, and the bottom mold mounting seat is fixedly installed on the upper surface of the middle part of the Base plate.

[0010] The bottom mold system is installed on the bottom mold mounting base, the fixing frame of the pressing module is fixed on the Base plate, and the multiple base columns are located on the outer periphery of the bottom mold system.

[0011] Furthermore, a pressure plate support column is fixed on the upper surface of the Base plate, and a support column is fixed on the pressure plate. The pressure plate support column is used to cooperate with the support column to precisely position the pressure plate in the horizontal direction and to coarsely position and limit the pressure plate in the vertical direction.

[0012] Furthermore, the bottom mold system includes a bottom mold, a support block, suction cups, and positioning spring pins. The bottom mold is mounted on a bottom mold mounting base. The bottom mold has a concave cavity in the middle. The support block is disposed in the concave cavity in the middle of the bottom mold. The suction cups are evenly distributed on the upper surface of the four peripheries of the bottom mold. The positioning spring pins are disposed on the outer side of the four peripheries of the bottom mold.

[0013] Furthermore, the pressing system includes two parallel and spaced pressing columns, the lower ends of which are fixed to the base plate, and each pressing column is located directly above a base column.

[0014] The flipping unit includes a flipping servo motor, a linkage mechanism, and a rotating beam. The flipping servo motor is fixed to one side of the pressing column. The output end of the flipping servo motor is connected to the rotating beam through the linkage mechanism. The two ends of the rotating beam are respectively rotatably connected to the upper ends of the two pressing columns.

[0015] The vertical lifting unit includes a fixed frame and a pressing cylinder. The fixed frame is fixed to the middle of the rotating crossbeam, and the pressing cylinder is fixed on the fixed frame. The output end of the pressing cylinder is fixedly connected to the pressing plate.

[0016] The rotating beam is driven to rotate in both directions by the flipping servo motor, so that the pressure plate switches between the pressure position and the open position. In the pressure position, the pressure plate covers the bottom mold system in a horizontal position. In the open position, the pressure plate stops above the rotating beam in an upright position.

[0017] Furthermore, safety locking pins are provided on both sides of the rotating beam. In the pressing position and the open position, the safety locking pins can lock the relative position between the rotating beam and the pressing column.

[0018] Furthermore, the base frame structure also includes a motor support, which is fixedly connected to the base column and is used to support the flipping servo motor of the flipping unit.

[0019] Furthermore, when the pressure plate is in the pressure position and the open position, the linkage mechanism is in the mechanical dead point position.

[0020] Furthermore, the vertical sliding assembly includes a vertical movable frame, a motor, a belt drive mechanism, and a lead screw and nut pair. The vertical movable frame is slidably connected to the fixed frame. The motor is fixed on the vertical movable frame. The output end of the motor is connected to the lead screw and nut pair through the belt drive mechanism. The relative movement of the vertical movable frame with respect to the fixed frame in the vertical direction is achieved by driving the lead screw and nut pair.

[0021] The horizontal sliding assembly includes a block assembly mounting base, a guide groove base, a sliding plate, and a drive cylinder. The drive cylinder is fixed on the vertical movable frame, and its output end is connected to the sliding plate. The guide groove base is fixed at the top of the vertical sliding assembly. The sliding plate is horizontally slidably disposed within the guide groove base, and the block assembly mounting base is fixed on the sliding plate. The drive cylinder drives the block assembly mounting base to move horizontally. The block assembly is fixed on the block assembly mounting base.

[0022] Furthermore, the horizontal sliding group drives the insert assembly to reciprocate horizontally between the working position and the retracted position; the vertical sliding group drives the insert assembly to move up and down, sequentially passing through the pre-pressing preparation position, the pre-pressing position, the final pressing preparation position, and the final pressing position from top to bottom; the horizontal sliding group also includes a working position stop block group and a retracted position stop block group, which are used to mechanically protect and limit the insert assembly in the working position and the retracted position, respectively; the vertical sliding group also includes a pre-pressing stop block group and a final pressing stop block group, which are used to mechanically protect and limit the insert assembly in the pre-pressing position and the final pressing position, respectively.

[0023] Furthermore, the pre-compression stop block group includes a first pre-compression stop block and a second pre-compression stop block, and the final compression stop block group includes a first final compression stop block and a second final compression stop block. The first pre-compression stop block and the second pre-compression stop block are respectively provided with a stop end and a clearance part.

[0024] In the pre-pressing position, the stopping ends of the first pre-pressing stop block and the second pre-pressing stop block contact each other to form a protective limit, and there is a gap between the first final pressing stop block and the second final pressing stop block in the vertical direction.

[0025] After pre-pressing is completed, the insert assembly first moves horizontally to the exit position. At this time, the stop end of the first pre-pressing stop block and the stop end of the second pre-pressing stop block have a gap in the horizontal direction. Then, the insert assembly moves downward to the final pressing preparation position, and then moves horizontally to the working position. At this time, the stop ends of the first pre-pressing stop block and the stop ends of the second pre-pressing stop block are respectively embedded in each other's clearance parts, so that the insert assembly can move downward to the final pressing position. When moving to the final pressing position, the first final pressing stop block and the second final pressing stop block contact each other to form a protective limit.

[0026] Furthermore, a transmission box is provided at the lower part of the vertical movable frame, and the belt drive mechanism is located inside the transmission box. The belt drive mechanism includes a driving pulley, a belt, and a driven pulley. The driving pulley is fixed on the output end of the motor, and the driven pulley is fixed on the lower end of the lead screw of the lead screw and nut pair. The driving pulley and the driven pulley are connected by the belt drive. The lead screw of the lead screw and nut pair is rotatably connected to the vertical movable frame and its axial position is fixed. The nut is fixed on the fixed frame. The motor of the vertical sliding group is a servo frequency converter motor equipped with an absolute encoder.

[0027] Furthermore, a vertically extending guide rail is fixed on the vertical movable frame, and a slider is fixed on the fixed frame. The slider cooperates with the guide rail so that the vertical movable frame can slide vertically relative to the fixed frame. The slide plate cooperates with the guide groove in the guide groove seat and can slide horizontally. A self-lubricating friction plate is installed in the guide groove.

[0028] On the other hand, a special-purpose machine pressing method is provided, which uses the aforementioned special-purpose machine for pressing automotive door covers and includes the following steps:

[0029] S1: The part to be pressed is placed on the bottom mold system, and the pressure plate rotates to the pressure position;

[0030] S2: The pressure plate 306 falls to contact and press against the parts to be pressed;

[0031] S3: The insert assembly moves upward from its initial position to its highest point, which is the pre-pressing preparation position and the exit position;

[0032] S4: The drive cylinder moves, the insert assembly moves horizontally to the working position, the motor moves, the insert assembly moves downward to the pre-pressing position, and the pre-pressing insert pre-presses the outer plate of the part.

[0033] S5: After pre-pressing is completed, the motor actuates, and the insert assembly moves upward to the pre-pressing preparation position, disengaging from the part; the drive cylinder performs a return motion, and the insert assembly moves horizontally to the exit position; the motor actuates, and the insert assembly moves downward to the final pressing preparation position; the drive cylinder actuates, and the insert assembly moves horizontally to the working position; the motor actuates, and the insert assembly moves downward to the final pressing position, where the final pressing insert performs final pressing on the outer plate of the part;

[0034] S6: After final pressing is completed, the motor is activated, the insert assembly moves upward to the final pressing preparation position and disengages from the part; the drive cylinder makes a return motion, the insert assembly moves away from the part to the initial position, the pressure plate is lifted upward, the pressure plate rotates to the open position, the part is removed, and one work cycle ends.

[0035] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0036] 1. The pressing machine of the present invention has a compact overall structure and occupies a small area;

[0037] 2. The bottom mold system, pressing system and pressing unit of the pressing machine of the present invention are all installed on the overall frame, with the same positioning reference and high dimensional accuracy;

[0038] 3. During the operation of the pressing machine of the present invention, each pressing module of the pressing unit operates independently without affecting each other, resulting in high stability. The pressing modules are independent of each other, which facilitates local adjustments to the process.

[0039] 4. The pressing unit of the pressing machine of the present invention adopts a modular design, reducing the types of spare parts;

[0040] 5. The pressing units of the pressing machine of the present invention are distributed around the periphery of the equipment, within easy reach, which facilitates daily maintenance and repair, and saves maintenance and repair time;

[0041] 6. The pressing unit of the pressing machine of the present invention can be adapted to complex part shapes by adjusting the installation angle;

[0042] 7. The driving components of the pressing machine of the present invention adopt conventional non-customized standard parts, which have strong versatility. Attached Figure Description

[0043] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0044] Figure 1A schematic diagram of the overall structure of a car door cover pressing machine according to an embodiment of the present invention is shown;

[0045] Figure 2 A schematic diagram of the base frame structure according to an embodiment of the present invention is shown;

[0046] Figure 3 A schematic diagram of a base frame structure without a bottom mold mounting base according to an embodiment of the present invention is shown;

[0047] Figure 4 A schematic diagram of the bottom mold system according to an embodiment of the present invention is shown;

[0048] Figure 5 A structural schematic diagram of the pressing system according to an embodiment of the present invention is shown from a forward view.

[0049] Figure 6 A schematic diagram of the pressing system according to an embodiment of the present invention is shown from a rear view.

[0050] Figure 7 A schematic diagram showing the pressure plate of the pressure system according to an embodiment of the present invention in the open position is illustrated.

[0051] Figure 8 A side view of the pressing module according to an embodiment of the present invention is shown;

[0052] Figure 9 An isometric view of the pressing module according to an embodiment of the present invention is shown in one direction;

[0053] Figure 10 An isometric view of the pressing module according to an embodiment of the present invention is shown from another direction;

[0054] Figure 11 A cross-sectional view of the pressing module according to an embodiment of the present invention is shown;

[0055] Figure 12 A schematic diagram of the overall structure of the pressing unit according to an embodiment of the present invention is shown;

[0056] Figure 13 A schematic diagram of the pressing process of a special machine for pressing automobile door covers according to an embodiment of the present invention is shown. Detailed Implementation

[0057] The above-mentioned and other technical features and advantages of the present invention will be described in more detail below with reference to the accompanying drawings.

[0058] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0059] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, unless otherwise explicitly specified.

[0060] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0061] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0062] like Figure 1As shown, this invention provides a special machine for pressing automotive door covers, comprising a base frame structure 100, a bottom mold system 200, a pressing system 300, a pressing unit 400, and an electrical control system (not shown in the figure). The pressing system 300, the bottom mold system 200, and the pressing unit 400 are all mounted on the base frame structure 100 and are respectively connected to and controlled by the electrical control system. Throughout the pressing process, the bottom mold system 200 remains fixed to the base frame structure 100 and in a static state, relying on the pressing unit to achieve the pre-pressing and final pressing process design.

[0063] like Figure 2 , 3 As shown, the base frame structure 100 provides effective support for the overall equipment and maintains its operational stability, while also providing an installation reference surface. The base frame system adopts a column-supported structure, achieving lightweight design while maintaining overall structural stability. An integral base plate 101 increases the contact area with the ground, ensuring operational stability and ensuring that the load borne by the ground during long-term use remains within the C30 concrete strength grade range, avoiding the need for special ground surfaces. Four base columns 102 are installed on the base plate 101 and equipped with a leveling device. The base plate 103 is fixed to the base columns 102, with its outer contour designed to match the shape of the parts and the arrangement of the pressing units. While ensuring strength, the inner side features a weight-reducing hollow design. The bottom mold mounting base 105 is fixed to the base plate 103 for mounting the bottom mold. The base columns 102 are located on the outer periphery of the bottom mold mounting base 105. The pressure plate support columns 104 are mounted on the base plate 103 and serve to position the pressure plate. Two of the pressure plate support columns 104 are equipped with positioning surfaces and positioning pins for precise horizontal positioning and coarse vertical positioning and limiting of the pressure plate. The other two pressure plate support columns 104 are equipped with positioning surfaces to achieve coarse vertical positioning and limiting of the pressure plate. The base frame structure 100 also includes a motor support part 106, which is fixedly connected to the base column 102 and is used to support the flipping servo motor of the flipping unit.

[0064] like Figure 4As shown, the bottom mold system 200 provides a support surface for the part during the pressing process and positions the part in space. Simultaneously, it effectively fixes the part using suction cups 203 to prevent movement during pressing. The bottom mold system consists of a bottom mold 201, a support block 202, suction cups 203, and positioning spring pins 204 for precise part positioning. The bottom mold 201 is mounted on the bottom mold mounting base 105. A part support block 202 is located in the center of the bottom mold 201 to support the part and prevent deformation in the middle. Suction cups 203 are evenly distributed around the working surface of the bottom mold 201 to firmly hold and fix the part, ensuring close contact between the part and the working surface of the bottom mold. Positioning spring pins 204 are arranged around the outer perimeter of the bottom mold 201 to ensure the accuracy of the relative position between the part and the bottom mold, providing consistent positioning of the part during the pressing process without affecting it.

[0065] like Figures 5-7 As shown, the basic function of the pressing system 300 is to fix the inner plate and the outer plate together throughout the pressing process, so that the pressing surface is placed flat on the bottom mold and will not move due to the force generated during the pressing process. At the same time, the pressing system should also position the inner plate parts to ensure the accuracy of the relative position of the inner plate and the outer plate. Figure 5 This is an isometric view from the front when the pressing system is in the pressing position. Figure 6 This is an isometric view from the rear when the material clamping system is in the clamping position. Figure 7 This is an axonometric view of the pressure system in the open position, from a frontal perspective. The pressure system 300 includes pressure columns 301, a tilting unit, a vertical lifting unit 305, and a pressure plate. The pressure columns 301 are fixed to the base frame structure 100. The tilting unit is mounted on the pressure columns, and the vertical lifting unit is mounted on the tilting unit. The pressure plate 306 is connected to the vertical lifting unit and is located above the bottom mold system 200. The lower end of the pressure columns 301 is fixed to the base plate 103, and each pressure column 301 is located directly above a corresponding base column 102. The tilting unit includes a tilting servo motor 302, a linkage mechanism 303, and a rotating beam 304. The tilting servo motor 302 is fixed to one side of the pressing column 301. The output end of the tilting servo motor 302 is connected to the rotating beam 304 through the linkage mechanism 303. The two ends of the rotating beam 304 are rotatably connected to the upper ends of the two pressing columns 301, respectively. The vertical lifting unit 305 includes a fixed frame and a pressing cylinder. The fixed frame is fixed to the middle of the rotating beam 304, and the pressing cylinder is fixed to the fixed frame. The output end of the pressing cylinder is fixedly connected to the pressing plate 306.

[0066] The flipping servo motor 302 is the power source for the flipping unit of the pressing system. The speed and acceleration are controlled by the frequency converter to reduce the impact of the large rotational inertia of the rotating part on the overall equipment during the flipping process. The flipping servo motor 302 drives the rotation of the rotating beam 304 through the linkage mechanism 303 to realize the switching of the pressing plate 306 between the open position and the pressing position. When the pressing plate swings to the pressing position, the linkage mechanism 303 is exactly at the mechanical dead point position, which can prevent the rotation of the shaft structure caused by the reverse force and maintain the uniqueness of the position. The detection switch 310 is used to detect the rotation position of the pressing system. At the same time, the safety locking pins 307 installed on both sides of the rotating beam 304 are opened to prevent the pressing system from moving due to the reverse force during the pressing process. Subsequently, the pressing plate 306 moves downward under the drive of the pressing cylinder to press the parts. At the same time, the support column 308 matches the pressing plate support column 104 in the base frame to realize the positioning of the pressing plate in space. When the pressing plate is in the open position, the linkage mechanism 303 is in the mechanical dead point position. The detection switch 310 detects the position of the pressing system, and the safety locking pins 307 are inserted into the limit hole 309 for mechanical locking.

[0067] like Figure 8 As shown, the pressing module consists of a fixed frame 1, a vertical sliding assembly 2, a horizontal sliding assembly 3, and an insert assembly 4. The fixed frame 1 is fixed to the Base plate 103 of the base frame system and its position is fixed during the pressing process.

[0068] like Figures 9-11 As shown, the vertical sliding assembly 2 includes a vertical movable frame 26, a motor 28, a belt drive mechanism, and a lead screw and nut pair. The vertical movable frame 26 is slidably connected to the fixed frame 1. The motor 28 is fixed to the vertical movable frame 26, and the output end of the motor 28 is connected to the lead screw and nut pair through the belt drive mechanism. The relative movement of the vertical movable frame 26 with respect to the fixed frame 1 in the vertical direction is achieved by driving the lead screw and nut pair.

[0069] In one specific embodiment, a transmission box 24 is provided at the lower part of the vertical movable frame 26. A belt drive mechanism is located inside the transmission box 24. The belt drive mechanism includes a driving pulley 241, a belt 242, and a driven pulley 243. The driving pulley 241 is fixed to the output end of the motor 28, and the driven pulley 243 is fixed to the lower end of the lead screw 23 of the lead screw and nut pair. The driving pulley 241 and the driven pulley 243 are connected by the belt 242. The lead screw 23 of the lead screw and nut pair is rotatably connected to the vertical movable frame 26 and its axial position is fixed. The nut 11 is fixed to the fixed frame 1. The belt drive mechanism can effectively buffer the impact during operation, providing stable and reliable transmission, strong buffering performance, and strong vibration absorption performance, making the operation more gentle. Combined with the structural form of the lead screw and nut pair, the size of the mechanism is reduced, making the mechanism more compact.

[0070] Motor 28 is a servo frequency converter motor equipped with an absolute encoder, which can accurately control the running position to ensure repeatability and ensure that the motor position zero point is not lost after power failure and restart. It is simple to program and easy to adjust. The vertical sliding group 2 includes a pre-pressing stop block group and a final pressing stop block group, which are used for mechanical protection limit at the pre-pressing position and the final pressing position, respectively, so that the vertical sliding group 2 has an overtravel protection function. The vertical movable frame 26 and the fixed frame 1 are respectively equipped with corresponding travel rulers 29 and pointers 14 for position correction during mechanism debugging. The vertical movable frame 26 is fixed with a vertically extending guide rail 27, and the fixed frame 1 is fixed with sliders 12 and 13. The sliders 12 and 13 cooperate with the guide rail 27 to allow the vertical movable frame 26 to slide vertically relative to the fixed frame 1.

[0071] Driven by the motor 28, the driving wheel 241 connected to it transmits torque to the driven wheel 243 via the belt 242. The lead screw 23, directly connected to the driven wheel 243, then rotates. Through its interaction with the nut 11, the circular motion is converted into linear motion, allowing the vertical sliding assembly 2 to reciprocate up and down along the fixed frame 1 via the guide rail 27 and the sliders 12 and 13. When the mechanism moves downwards for pre-pressing, the pre-pressing stop block assembly provides mechanical limit protection; when the mechanism moves downwards for final pressing, the final pressing stop block assembly provides mechanical limit protection.

[0072] A horizontal sliding assembly mounting base 21 is fixed to the top of the vertical movable frame 26. The horizontal sliding assembly 3 includes an insert component mounting base 32, a guide slot seat 33, a slide plate 35, a drive cylinder 31, and a guide slot mounting plate 37. The guide slot mounting plate 37 is fixed to the horizontal sliding assembly mounting base 21, the drive cylinder 31 is fixed to the vertical movable frame 26, the output end 39 of the drive cylinder 31 is connected to the slide plate 35, the guide slot seat is fixed to the guide slot mounting plate 37, the slide plate 35 is horizontally slidably disposed within the guide slot seat 33, and the insert component mounting base 32 is fixed to the slide plate 35. The drive cylinder 31 drives the insert component mounting base 32 to move horizontally. The horizontal sliding assembly also includes working position stop block groups 36, 36' and exit position stop block groups 38, 38', which are used to mechanically limit the horizontal sliding assembly 3 in the working position and exit position, respectively. The slide plate 35 engages with the guide groove in the guide slot seat 33, allowing for horizontal sliding. A self-lubricating friction plate 34 is installed within the guide groove, effectively reducing maintenance workload. The horizontal sliding of the insert assembly mounting base 32 is directly driven by a cylinder, resulting in a simple, direct, and fast structure.

[0073] The insert assembly 4 is fixed on the insert assembly mounting base 32. The insert assembly 4 includes an insert mounting plate 43, a final pressing insert 41, and a pre-pressing insert 42 located below it.

[0074] The horizontal sliding assembly 3 drives the insert assembly 4 to reciprocate horizontally between the working position and the exit position. The vertical sliding assembly 2 drives the insert assembly 4 to move up and down, sequentially passing through the pre-pressing preparation position, the pre-pressing position, the final pressing preparation position, and the final pressing position from top to bottom. The pre-pressing stop block assembly includes a first pre-pressing stop block 22 and a second pre-pressing stop block 22', and the final pressing stop block assembly includes a first final pressing stop block 25 and a second final pressing stop block 25'. The first pre-pressing stop block 22 is provided with a stop end 221 and a clearance part 222, and the second pre-pressing stop block 22' is provided with a stop end 221' and a clearance part 222'. In the pre-pressing position, the stop ends of the first pre-pressing stop block 22 and the second pre-pressing stop block 22' contact each other to form a protective limit, and there is a gap between the first final pressing stop block 25 and the second final pressing stop block 25' in the vertical direction. After pre-pressing is completed, the insert assembly 4 first moves horizontally to the exit position. At this time, the stop end 221 of the first pre-pressing stop block 22 and the stop end 221' of the second pre-pressing stop block 22' have a gap in the horizontal direction. Then, the insert assembly 4 moves downward to the final pressing preparation position, and then moves horizontally to the working position. At this time, the stop end 221 of the first pre-pressing stop block 22 and the stop end 221' of the second pre-pressing stop block 22' respectively embed into the avoidance parts 222' and 222, so that the insert assembly 4 can move downward to the final pressing position. When moving to the final pressing position, the first final pressing stop block 25 and the second final pressing stop block 25' contact each other to form a protective limit.

[0075] like Figure 12 As shown, multiple automotive door cover pressing modules of the present invention are combined to form the pressing unit of the pressing machine. The pressing unit adopts a modular design to reduce the types of spare parts. The automotive door cover pressing modules can be adapted to complex part shapes by adjusting the installation angle.

[0076] The pressing process of the pressing module is as follows: The insert assembly is in the initial position. When the motor receives the working signal, it drives the vertical movable frame and the connected horizontal sliding assembly and insert assembly to rise to the highest point, i.e., the pre-pressing preparation position and the exit position. After detecting the arrival signal, the drive cylinder of the horizontal sliding assembly is fed back, and the cylinder starts to move. It drives the insert assembly horizontally to a position above the part to be pressed, i.e., the pre-pressing preparation position and the working position. After detecting the cylinder arrival signal, a feedback signal is sent to the motor. The motor operates under the control of the frequency converter, driving the insert assembly downward until it reaches the pre-pressing position and the working position. The pre-pressing insert 42 pre-presses the outer plate of the part. After the pre-pressing is completed, the motor drives the insert assembly upward to disengage from the part, to the pre-pressing preparation position and the working position. Subsequently, the drive cylinder performs a return motion, driving the insert assembly away from the part to a safe position, i.e., the pre-pressing preparation position and the exit position. The arrival signal is sent to the motor, and the motor drives the insert assembly downward to the final pressing preparation position and the exit position. Subsequently, the drive cylinder actuates, moving the insert assembly horizontally to a position above the area to be pressed on the part, i.e., the final pressing preparation position and working position. Upon detecting the cylinder's arrival signal, a feedback signal is sent to the motor, which, under the control of the frequency converter, drives the insert assembly downwards. Until the final pressing position and working position, the final pressing insert 41 performs final pressing on the outer plate of the part. After final pressing is completed, the motor rotates, moving the insert assembly upwards to disengage from the part, i.e., the final pressing preparation position and working position. Then, the horizontal drive cylinder performs a return stroke, moving the insert assembly away from the part back to its initial position. This completes one work cycle.

[0077] like Figure 13 As shown, the pressing method of the above-mentioned pressing machine is as follows:

[0078] Step 1: The part to be pressed is placed on the bottom mold 201, and the pressure plate 306 is rotated to the pressing preparation position;

[0079] Step 2: The pressure plate 306 descends to contact and press against the parts to be pressed;

[0080] Step 3: The pre-pressing insert 42 and the final pressing insert 41 slide horizontally to the pre-pressing preparation position and the working position under the drive of the drive cylinder 31.

[0081] Step 4: The pre-pressing insert 42 moves downward in the vertical direction under the drive of the motor 28, and the pre-pressing insert 42 contacts the part to be pressed and causes the part to deform.

[0082] Step 5: After the pre-pressing is completed, motor 28 stops running, and the parts are pre-pressed.

[0083] Step 6: The pre-pressed insert 42 and the final pressed insert 41 slide horizontally to the exit position under the drive of the drive cylinder 31;

[0084] Step 7: The pre-pressing insert 42 and the final pressing insert 41 move vertically downwards under the drive of the motor 28 to the final pressing preparation position and the exit position;

[0085] Step 8: The pre-pressing insert 42 and the final pressing insert 41 slide horizontally to the final pressing preparation position and the working position under the drive of the drive cylinder 31.

[0086] Step 9: The final pressing insert 42 moves downward in the vertical direction under the drive of the motor 28, and the final pressing insert 41 contacts the part to be pressed and deforms the part until the final pressing is completed.

[0087] Step 10: The pre-pressed insert 42 and the final pressed insert 41 slide horizontally to the exit position under the drive of the drive cylinder 31;

[0088] Step 11: The pressure plate 306 is lifted upwards to open;

[0089] Step 12: The pressure plate 306 is rotated to the open position, and the pressed part is removed, completing one work cycle.

[0090] The above are merely preferred embodiments of the present invention and are illustrative rather than restrictive. The structure and connection methods of the components in the present invention can be varied, and any equivalent transformations and improvements made based on the technical solution of the present invention should not be excluded from the protection scope of the present invention.

Claims

1. A press machine for automobile door cover, characterized in that, The base frame structure, the bottom die system, the pressing system and the pressing unit are all installed on the base frame structure; The base frame structure is fixed on the foundation, and the bottom die system, the pressing system and the pressing unit are all installed on the base frame structure; During the operation, the position of the bottom die system and the base frame structure is fixed; The pressing unit is composed of multiple independently-acting pressing modules, each of which is arranged around the bottom die system, and each pressing module comprises a fixed rack, a vertical sliding group, a horizontal sliding group and an inlay block assembly connected in sequence, the fixed rack is fixed on the base frame structure, the vertical sliding group and the horizontal sliding group can respectively drive the inlay block assembly to displace in the vertical direction and the horizontal direction, the inlay block assembly comprises a final pressing inlay block and a pre-pressing inlay block located below the final pressing inlay block, the horizontal sliding group drives the inlay block assembly to reciprocate horizontally between a working position and an exit position, and the vertical sliding group drives the inlay block assembly to displace up and down, sequentially passing through a pre-pressing preparation position, a pre-pressing position, a final pressing preparation position and a final pressing position from top to bottom; The vertical sliding group comprises a pre-pressing stop block group and a final pressing stop block group, which are respectively used for mechanically protecting and limiting the inlay block assembly at the pre-pressing position and the final pressing position, the pre-pressing stop block group comprises a first pre-pressing stop block and a second pre-pressing stop block, the final pressing stop block group comprises a first final pressing stop block and a second final pressing stop block, the first pre-pressing stop block and the second pre-pressing stop block are respectively provided with a stop end and an avoiding part, at the pre-pressing position, the stop ends of the first pre-pressing stop block and the second pre-pressing stop block are in contact with each other to form a protection limit, and the first final pressing stop block and the second final pressing stop block have a gap in the vertical direction, after the pre-pressing is completed, the inlay block assembly is first moved horizontally to the exit position, at this time, the stop end of the first pre-pressing stop block and the stop end of the second pre-pressing stop block have a gap in the horizontal direction, then the inlay block assembly is moved downward to the final pressing preparation position, and then moved horizontally to the working position, at this time, the stop end of the first pre-pressing stop block and the stop end of the second pre-pressing stop block are embedded into the avoiding part of the other one, so that the inlay block assembly can be moved downward to the final pressing position, and when the inlay block assembly is moved to the final pressing position, the first final pressing stop block and the second final pressing stop block are in contact with each other to form a protection limit; The pressing system comprises a pressing column, a turnover unit, a vertical lifting unit and a pressing plate, the pressing column is fixed on the base frame structure, the turnover unit is installed on the pressing column, the vertical lifting unit is installed on the turnover unit, and the pressing plate is connected with the vertical lifting unit and located above the bottom die system.

2. The automobile door cover press-fit special machine according to claim 1, wherein, The base frame structure comprises a monolithic base plate, multiple base columns, a Base plate and a bottom die mounting seat, the monolithic base plate is fixed on the foundation, the lower end of the base column is fixed on the monolithic base plate, the upper end of the base column is fixedly connected with the Base plate, and the middle upper surface of the Base plate is fixedly installed with the bottom die mounting seat. The bottom die system is installed on the bottom die mounting seat, the fixed frame of the pressing module is fixed on the Base plate, and the plurality of base columns are located on the outer circumferential side of the bottom die system.

3. The automobile door cover press-fit special machine according to claim 2, wherein The upper surface of the Base plate is fixed with a pressing plate support column, the pressing plate is fixed with a support column, and the pressing plate support column is used to cooperate with the support column to finely position the position of the pressing plate in the horizontal direction, and coarsely position and limit the position of the pressing plate in the vertical direction.

4. The automobile door cover press-fit special machine according to claim 2, wherein, The bottom die system comprises a bottom die, a support block, a suction cup and a positioning spring pin, the bottom die is installed on the bottom die mounting seat, the middle part of the bottom die is a cavity, the support block is arranged in the cavity in the middle part of the bottom die, the suction cups are uniformly arranged on the upper surface of the four circumferential edges of the bottom die, and the positioning spring pin is arranged on the outer side of the four circumferential edges of the bottom die.

5. The automobile door cover press-fit special machine according to claim 2, wherein, The pressing system comprises two parallel and spaced pressing columns, the lower ends of the pressing columns are fixed on the Base plate, and each pressing column is located directly above one base column; The turnover unit comprises a turnover servo motor, a connecting rod mechanism and a rotating cross beam, the turnover servo motor is fixed on one side of the pressing column, the output end of the turnover servo motor is connected with the rotating cross beam through the connecting rod mechanism, and the two ends of the rotating cross beam are respectively rotationally connected to the upper ends of the two pressing columns; The vertical lifting unit comprises a fixed frame and a pressing cylinder, the fixed frame is fixed in the middle part of the rotating cross beam, the pressing cylinder is fixed on the fixed frame, and the output end of the pressing cylinder is fixedly connected with the pressing plate. The rotating cross beam is driven by the turnover servo motor to rotate forward and reverse, so that the pressing plate is switched between the pressing position and the opening position, in the pressing position, the pressing plate covers the bottom die system in a horizontal posture, and in the opening position, the pressing plate stops above the rotating cross beam in an upright posture.

6. The automobile door cover press-fit special machine according to claim 5, wherein, The two sides of the rotating cross beam are respectively provided with safety lock pins, and the safety lock pins can lock the relative position between the rotating cross beam and the pressing column in the pressing position and the opening position.

7. The automobile door cover press-fit special machine according to claim 5, wherein, The base frame structure further comprises a motor support part fixedly connected with the base column and used for bearing the turnover servo motor of the turnover unit.

8. The automobile door cover press-fit special machine according to claim 5, wherein, When the pressing plate is located at the pressing position and the opening position, the connecting rod mechanism is located at a mechanical dead point position.

9. The automobile door cover pressing machine of claim 2, wherein, The vertical sliding group further comprises a vertical movable frame, a motor, a belt transmission mechanism and a screw nut pair, the vertical movable frame is slidably connected with the fixed frame, the motor is fixed on the vertical movable frame, the output end of the motor is transmissionally connected with the screw nut pair through the belt transmission mechanism, and relative movement of the vertical movable frame relative to the fixed frame in the vertical direction is realized by driving the screw nut pair. The horizontal sliding group comprises a panel assembly mounting seat, a guide groove seat, a sliding plate and a driving cylinder, the driving cylinder is fixed on the vertical movable frame, the output end of the driving cylinder is connected with the sliding plate, the guide groove seat is fixed on the top end of the vertical sliding group, the sliding plate is horizontally slidably arranged in the guide groove seat, and the panel assembly mounting seat is fixed on the sliding plate; the panel assembly mounting seat is driven by the driving cylinder to move horizontally; and the panel assembly is fixed on the panel assembly mounting seat.

10. The automobile door cover press-fit special machine according to claim 9, wherein, The horizontal sliding group further comprises a working position stopper group and a withdrawal position stopper group, which are respectively used for mechanically protecting and limiting the panel assembly in the working position and the withdrawal position.

11. The automobile door cover press-fit special machine according to claim 9, wherein, The lower part of the vertical movable frame is provided with a transmission box, the belt transmission mechanism is located in the transmission box, the belt transmission mechanism comprises a driving wheel, a belt and a driven wheel, the driving wheel is fixed on the output end of the motor, the driven wheel is fixed on the lower end of the screw rod of the screw nut pair, and the driving wheel and the driven wheel are connected in transmission through the belt; the screw rod of the screw nut pair is rotationally connected with the vertical movable frame and is fixed in axial position, and the nut is fixed on the fixed frame; the motor of the vertical sliding group is a servo variable frequency motor provided with an absolute value encoder.

12. The automobile door cover press-fit special machine according to claim 9, wherein, A vertical guide rail is fixed on the vertical movable frame, a sliding block is fixed on the fixed frame, the sliding block cooperates with the guide rail to enable the vertical movable frame to slide relative to the fixed frame in the vertical direction; the sliding plate cooperates with a guide groove in the guide groove seat to horizontally slide, and a self-lubricating friction plate is arranged in the guide groove.

13. A method of pressing a door cover of an automobile using the door cover pressing machine according to any one of claims 9 to 12, wherein The method comprises the following steps: S1: the parts to be pressed are placed on the bottom die system, and the pressing plate is rotated to the pressing position; S2: the pressing plate falls to contact and press the parts to be pressed; S3: the panel assembly moves upward from the initial position to the highest point, i.e. the pre-pressing preparation position and the withdrawal position; S4: the driving cylinder moves the panel assembly horizontally to the working position, the motor moves the panel assembly downward to the pre-pressing position, and the pre-pressing panel pre-presses the outer plate of the part; S5: after the pre-pressing is completed, the motor moves the panel assembly upward to the pre-pressing preparation position, and the panel assembly is separated from the part; the driving cylinder moves back, the panel assembly moves horizontally to the withdrawal position, the motor moves the panel assembly downward to the final pressing preparation position, the driving cylinder moves the panel assembly horizontally to the working position, the motor moves the panel assembly downward to the final pressing position, and the final pressing panel finally presses the outer plate of the part; S6: after the final pressing is completed, the motor moves the panel assembly upward to the final pressing preparation position, and the panel assembly is separated from the part; the driving cylinder moves back, the panel assembly is separated from the part to the initial position, the pressing plate is lifted upward, the pressing plate is rotated to the open position, the part is taken away, and one working cycle is completed.

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