A three-step pressing machine and method for automobile door covers

Abstract

The present invention discloses a three-step pressing machine and method for automobile door covers, comprising a base unit and a bottom mold unit connected thereto, a pressing unit, and a pressing unit; the pressing unit comprises a plurality of independently moving three-step pressing modules distributed around the base unit, the three-step pressing modules comprising a fixed frame, a vertical sliding group, a horizontal sliding group, and an insert assembly connected in sequence, the insert assembly comprising a final pressing insert and a pre-pressing insert, the bottom end of the pre-pressing insert being provided with a first pre-pressing working surface and a second pre-pressing working surface; the pressing unit comprises two pressing columns, a drive assembly, and a pressing plate; an auxiliary pressing assembly is mounted on the pressing plate, the auxiliary pressing assembly comprising an auxiliary pressing cylinder and a pressing sheet, the auxiliary pressing cylinder being fixedly connected to the pressing plate; the inclination of the outer surface of the pressing sheet is equal to the inclination of the first expected deformation of the location to be pressed, and the piston rod of the auxiliary pressing cylinder is fixedly connected to the pressing sheet. The present application can achieve three-step pressing at large-angle openings on parts.

Description

Technical Field

[0001] The present invention relates to the technical field of hemming of inner and outer panels of a vehicle body-in-white door cover, and in particular to a three-step pressing machine and method for automobile door covers. Background Art

[0002] Currently, dedicated press-fit technology is widely used in major automotive body-in-white (BIW) door hood production lines for the press-fit and hemming of inner and outer panels. This technology primarily targets left and right front doors, left and right rear doors, front and rear lids, and other components. It offers advantages such as stable processes and high production speeds. However, door hood press-fit technology and production equipment are subject to high costs and difficulties in technical improvement. Furthermore, the flange opening angles of certain locations on the outer panels of four doors and two lids are relatively large, requiring a three-step press-fit process to achieve a complete seal.

[0003] In order to reduce production costs, improve the use value of equipment, and avoid adding additional equipment for pre-pushing corners or pre-pushing edges, the present application invents a device that can achieve three-step pressing. Summary of the Invention

[0004] In order to solve at least one aspect of the above problems, the present invention provides a three-step pressing machine for automobile door covers that has high stability, high precision, high working efficiency and can achieve three-step pressing.

[0005] The present invention provides a three-step pressing machine for automobile door covers, comprising a base unit, a bottom die unit, a pressing unit and a pressing unit; the base unit is fixed on a foundation; the bottom die unit is fixedly mounted on the base unit; the pressing unit comprises a plurality of three-step pressing modules that act independently, and the plurality of three-step pressing modules are distributed around the base unit; the three-step pressing module comprises a fixed frame, a vertical sliding group, a horizontal sliding group and an insert assembly that are connected in sequence; the fixed frame is fixedly connected to the base unit; the insert assembly comprises a final pressing insert and a pre-pressing insert, and the pre-pressing insert The bottom end of the insert is provided with a first pre-pressing working surface and a second pre-pressing working surface; the horizontal sliding group drives the insert assembly to reciprocate horizontally between the first pressing start position and the pre-pressing preparation position, between the second pressing start position and the pre-pressing preparation position, and between the final pressing start position and the final pressing preparation position; the vertical sliding group drives the insert assembly to reciprocate horizontally between the first pressing start position and the first pressing end position, between the second pressing start position and the second pressing end position, between the final pressing start position and the final pressing end position, and between the pre-pressing preparation position and the final pressing start position. The pressing unit reciprocates vertically between the pressing preparation position and the final pressing preparation position; when the insert assembly moves from the first pressing start position to the first pressing end position, the part to be pressed contacts the first pre-pressing working surface; when the insert assembly moves from the second pressing start position to the second pressing end position, the part to be pressed contacts the second pre-pressing working surface; the pressing unit includes two pressing columns, a driving assembly and a pressing plate, the pressing column is fixed on the base unit, the driving assembly is installed on the pressing column, and the pressing plate is connected to the driving assembly for driving The dynamic pressing plate approaches or moves away from the bottom die unit. When the pressing plate approaches the bottom die unit, the pressing plate is located directly above the bottom die unit. An auxiliary pressing assembly is installed on the pressing plate. The auxiliary pressing assembly includes an auxiliary pressing cylinder and a pressing piece. The auxiliary pressing cylinder is fixedly connected to the pressing plate. The inclination of the outer side surface of the pressing piece is equal to the inclination of the first expected deformation of the place to be pressed. The piston rod of the auxiliary pressing cylinder is fixedly connected to the pressing piece. When the insert assembly moves from the starting position of the first step of pressing to the ending position of the first step of pressing, the pressing piece is connected to the place to be pressed.

[0006] Preferably, the base unit includes an integrated base frame and several leveling bottom plates; the integrated base frame includes a bottom mold mounting portion, several column portions, several top connecting piece portions, several bottom connecting piece portions and two pressing column mounting portions; the bottom mold mounting portion matches the part to be pressed; the column portion is vertically arranged, and the several column portions are fixedly distributed around the bottom mold mounting portion; the top connecting piece portion and the bottom connecting piece portion are horizontally arranged, and the several top connecting pieces and the several bottom connecting piece portions are distributed around the bottom mold mounting portion, and the several top connecting piece portions are respectively fixedly connected between the top ends of two adjacent column portions and are all connected to the bottom mold mounting portion. The side of the bottom mold mounting part is fixed, and several bottom connecting pieces are respectively fixedly connected between the bottom ends of two adjacent column parts and are all fixed to the side of the bottom mold mounting part; the two pressing column mounting parts are respectively fixedly connected to the top ends of two oppositely arranged column parts; several leveling base plates are respectively horizontally arranged below the several bottom connecting pieces, and adjusting bolts are connected between the upper and lower corresponding bottom connecting pieces and the leveling base plates; the fixed frames of multiple three-step pressing modules are respectively fixedly connected to multiple top connecting pieces, and the bottom ends of the two pressing columns are respectively fixedly connected to the top surfaces of the two pressing column mounting parts.

[0007] Preferably, the base unit further includes a plurality of hooks, which are respectively fixedly connected to the plurality of top connecting pieces.

[0008] Preferably, the bottom mold unit includes a bottom mold, a support block, a plurality of suction cups and a plurality of positioning spring pins; the bottom mold matches the part to be pressed, the bottom mold is fixedly mounted on the bottom mold mounting portion, the middle part of the bottom mold is a concave cavity, the support block is fixedly arranged in the concave cavity in the middle part of the bottom mold, a plurality of suction cups are evenly and fixedly arranged on the upper surface of the inner side of the bottom mold periphery, and a plurality of positioning spring pins are fixedly arranged on the outer surface of the bottom mold periphery.

[0009] Preferably, the bottom mold unit also includes a plurality of first limiting columns, which are distributed along the periphery of the bottom mold, and the bottom ends of the first limiting columns are fixedly connected to the outer side surfaces of the periphery of the bottom mold; a plurality of second limiting columns are arranged on the pressing plate, which are distributed along the periphery of the pressing plate, and the top ends of the second limiting columns are fixedly connected to the edge of the pressing plate; during operation, the first limiting columns correspond one to one with the second limiting columns, and the corresponding top ends of the first limiting columns are connected to the bottom ends of the second limiting columns.

[0010] Preferably, the horizontal sliding group includes a guide groove seat, a slide and a horizontal driving member; the guide groove seat is fixed to the top of the vertical movable frame, the slide is arranged in the guide groove seat, and is slidably connected to the guide groove seat along the horizontal direction; the horizontal driving member is connected to the slide, for driving the slide to slide in the guide groove seat along the horizontal direction; the three-step pressing module also includes a first limit assembly, the first limit assembly includes a first limit block and a second limit block, the first limit block is fixedly connected to the first end of the bottom surface of the slide, and the second limit block is fixedly connected to the outer side wall of the bottom mold; when the insert assembly moves from the first step pressing starting position to the first step pressing ending position and from the second step pressing starting position to the second step pressing ending position, the first limit block is located directly above the second limit block, and when the first limit block is connected to the second limit block, the insert assembly is at the first step pressing ending position or the second step pressing ending position.

[0011] Preferably, the driving assembly includes a flipping servo motor, a connecting rod mechanism, a rotating beam, two cantilevers, a pressing cylinder, a connecting plate and a guide column; the two ends of the rotating beam are respectively rotatably connected to the top ends of the two pressing columns, the flipping servo motor is fixed on one side of the pressing column, the output end of the flipping servo motor is connected to the connecting rod mechanism, and the connecting rod mechanism is connected to the rotating beam for driving the rotating beam to rotate; the first ends of the two cantilevers are fixedly connected to the middle area of ​​the rotating beam, the pressing cylinder is fixedly connected between the second ends of the two cantilevers, the piston rod of the pressing cylinder is fixedly connected to the connecting plate, and the connecting plate is arranged parallel to and fixedly connected to the pressing plate; the guide column is connected between the second end of the cantilever and the connecting plate, and the extension direction of the guide column is the same as the extension direction of the piston rod of the pressing cylinder.

[0012] Preferably, the second end of the cantilever is fixedly connected to a flip swing arm cylinder, and a pressure block is fixedly connected to the free end of the swing arm of the flip swing arm cylinder. During operation, the flip swing arm cylinder drives the pressure block to connect with the clamping surface of the pressure plate.

[0013] Preferably, a safety component is provided on the pressing column, which includes a manual lock pin, an indicator light and a conductive part; the lock pin part of the manual lock pin is made of conductive material, and the manual lock pin and the conductive part are installed on the pressing column; the indicator light is fixedly connected to the top of the pressing column, and the indicator light is electrically connected to the conductive part and the lock pin part. When the lock pin part is connected to the conductive part, the indicator light lights up.

[0014] The present application also provides a three-step pressing method for automobile door covers, using any of the above-mentioned three-step pressing machines for automobile door covers, comprising the following steps:

[0015] Step 1: Place the outer panel parts and the inner panel parts on the bottom mold, operate the drive assembly to move the pressing plate to contact the inner panel parts and apply pressing force. At this time, the insert assembly is in the pre-pressing preparation position;

[0016] Step 2: The auxiliary pressing cylinder drives the pressing piece downward until it connects with the outer panel part where it is to be pressed;

[0017] Step 3: driving the horizontal sliding group to move the insert assembly from the pre-pressing preparation position to the first pressing start position;

[0018] Step 4: Operate the vertical sliding group to move the insert assembly downward from the first pressing start position to the first pressing end position. During this process, the first pre-pressing working surface of the pre-pressing insert contacts the outer panel part and causes it to deform. When the insert assembly is at the first pressing end position, the outer panel part reaches the first expected deformation, and the vertical sliding group is stopped.

[0019] Step 5: operating the vertical sliding group to move the insert assembly upward from the first pressing end position to the first pressing start position;

[0020] Step 6: The auxiliary pressing cylinder drives the pressing piece upward to its original position;

[0021] Step 7: driving the horizontal sliding group to move the insert assembly to the second pressing start position;

[0022] Step 8: The vertical sliding group is operated to move the insert assembly downward from the second pressing start position to the second pressing end position. During this process, the second pre-pressing working surface of the pre-pressing insert contacts and deforms the outer panel part after the deformation in step 4. When the insert assembly is at the second pressing end position, the outer panel part reaches the second expected deformation, and the vertical sliding group is stopped.

[0023] Step 9: Operate the vertical sliding group to move the insert assembly upward from the second pressing end position to the second pressing start position; drive the horizontal sliding group to move the insert assembly from the second pressing start position to the pre-pressing preparation position;

[0024] Step 10: operating the vertical sliding group to move the insert assembly from the pre-pressing preparation position to the final pressing preparation position;

[0025] Step 11: driving the horizontal sliding group to move the insert assembly from the final pressing preparation position to the final pressing start position;

[0026] Step 12: The vertical sliding group is operated to move the insert assembly downward from the final pressing start position to the final pressing end position. During this process, the final pressing working surface of the final pressing insert contacts and deforms the outer panel part after being deformed in step 8. When the insert assembly is at the final pressing end position, the outer panel part reaches the final expected deformation, and the vertical sliding group is stopped.

[0027] Step 13: operating the vertical sliding group to move the insert assembly upward from the final pressing end position to the final pressing start position; driving the horizontal sliding group to move the insert assembly from the final pressing start position to the final pressing preparation position;

[0028] Step 14: Operate the vertical sliding group to move the insert assembly from the final pressing preparation position to the pre-pressing preparation position.

[0029] The three-step pressing machine and method for automobile door covers of the present invention have the following beneficial effects:

[0030] (1) By designing a vertical sliding group on a fixed frame, arranging a horizontal sliding group on the vertical sliding group, designing an insert assembly on the horizontal sliding group, designing final pressing inserts and pre-pressing inserts distributed up and down in the insert assembly, and designing a first pre-pressing working surface and a second pre-pressing working surface on the pre-pressing insert, it is realized that under the cooperative drive of the vertical sliding group and the horizontal sliding group, the first pre-pressing working surface of the pre-pressing insert, the second pre-pressing working surface of the pre-pressing insert and the final pressing working surface of the final pressing insert are pressed with the part to be pressed in sequence; and an auxiliary pressing assembly is designed on the pressing plate. In the first pressing step, the pressing sheet is driven to connect with the part to be pressed, and then the first pre-pressing working surface of the pre-pressing insert in the insert assembly is driven to press with the part to be pressed, so that the part is pressed into the first expected deformation state parallel to the pressing sheet, which helps to improve the pressing effect. The device of the present application can realize three-step pressing of parts without adding any additional equipment, and has high stability, high precision, high working efficiency and good pressing effect.

[0031] (2) By providing matching first and second stop blocks, matching third and fourth stop blocks, matching first and second limit blocks, and matching third and fourth limit blocks, the operation of the vertical sliding group and the horizontal sliding group is limited and positioned, thereby improving the stability and accuracy of the operation of the device of the present application, and helping to protect the insert assembly and extend the service life of the device of the present application.

[0032] (3) By designing the vertical sliding group as a motor driving the active wheel, the belt driving the driven wheel, and then the screw-nut pair transmission to realize the movement of the insert assembly in the vertical direction, it has the characteristics of simple structure, stable and reliable transmission, strong buffering performance, and strong vibration absorption performance, which can effectively alleviate the impact of the force generated by the pressing process on the equipment; the horizontal sliding group is designed as a driving cylinder to drive the insert assembly to move in the horizontal direction through the guide groove seat and the slide plate. The structure is simple and direct, and the speed is fast.

[0033] (4) By adopting an integrated base frame in the base unit, the structure has good stability and low processing cost.

[0034] (5) By designing a manual lock pin, an indicator light and a conductive part, during maintenance, the staff can operate the manual lock pin to light up the indicator light, which serves as a reminder and helps to improve the safety of the device of this application.

[0035] (6) By designing a pressing cylinder and a locking cylinder on the rotating beam, it helps to improve the stability of the pressing plate during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] To better understand the above and other objects, features, advantages, and functions of the present invention, reference may be made to the embodiments shown in the accompanying drawings. Like reference numerals in the accompanying drawings refer to like components. Those skilled in the art should understand that the accompanying drawings are intended to illustrate preferred embodiments of the present invention by way of illustration and are not intended to limit the scope of the present invention. The components in the drawings are not drawn to scale.

[0037] Figure 1 A schematic structural diagram of a three-step pressing machine for automobile door covers according to an embodiment of the present invention is shown;

[0038] Figure 2 A schematic structural diagram of a base unit of a three-step pressing machine for automobile door covers according to an embodiment of the present invention is shown;

[0039] Figure 3 A schematic structural diagram of a bottom die unit of a three-step pressing machine for automobile door covers according to an embodiment of the present invention is shown;

[0040] Figure 4 A schematic structural diagram of a press plate of a three-step pressing machine for automobile door covers according to an embodiment of the present invention is shown;

[0041] Figure 5 A schematic structural diagram of a pressing unit of a three-step pressing machine for automobile door covers according to an embodiment of the present invention is shown at a first angle;

[0042] Figure 6 A schematic structural diagram of a pressing unit of a three-step pressing machine for automobile door covers according to an embodiment of the present invention is shown at a second angle;

[0043] Figure 7 A schematic structural diagram of a three-step pressing module of a three-step pressing machine for automobile door covers according to an embodiment of the present invention is shown at a first angle;

[0044] Figure 8 A schematic structural diagram of a three-step pressing module of a three-step pressing machine for automobile door covers according to an embodiment of the present invention is shown at a second angle;

[0045] Figure 9A schematic structural diagram of a three-step pressing module of a three-step pressing machine for automobile door covers according to an embodiment of the present invention is shown at a third angle;

[0046] Figure 10 A cross-sectional view of a three-step pressing module of a three-step pressing machine for automobile door covers according to an embodiment of the present invention is shown;

[0047] Figure 11 A simplified structural diagram of a three-step pressing machine for automobile door covers according to an embodiment of the present invention is shown;

[0048] Figure 12 A simplified structural diagram of an insert assembly of a three-step pressing machine for automobile door covers according to an embodiment of the present invention is shown;

[0049] Figure 13 A schematic diagram of a process of a three-step pressing method for an automobile door cover according to an embodiment of the present invention is shown.

[0050] Description of reference numerals:

[0051] 1. Three-step pressing module; 11. Fixed frame; 111. Dust shield; 112. Travel scale; 121. Vertical movable frame; 1211. Pointer; 122. Motor; 123. Driving pulley; 124. Driven pulley; 125. Belt; 126. Screw; 127. Nut; 128. Guide rail; 129. Slider; 1210. Mounting box; 131. Guide slot seat; 132. Slide plate; 133. Driving cylinder; 134. Connecting seat; 135 , cover plate; 136, friction plate; 137, connecting plate; 141, mounting seat; 1411, mounting plate; 1412, mounting frame; 142, final pressing insert; 143, pre-pressing insert; 1431, first pre-pressing working surface; 1432, second pre-pressing working surface; 151, stop cylinder; 152, first stop block; 153, second stop block; 161, third stop block; 162, fourth stop block; 171, first limit block; 172 , second limit block; 181, third limit block; 182, fourth limit block; 19, position sensor; 2, pressing unit; 21, pressing column; 22, pressing plate; 221, auxiliary pressing assembly; 222, second limit column; 23, flip servo motor; 24, connecting rod mechanism; 25, rotating beam; 251, rotating shaft; 26, cantilever; 27, pressing cylinder; 28, connecting plate; 29, guide column; 210, flip swing arm cylinder; 211, manual Lock pin; 212, indicator light; 213, safety lock pin; 3, bottom mold unit; 31, bottom mold; 32, support block; 33, suction cup; 34, positioning spring pin; 35, first limiting column; 4, base unit; 41, integrated base frame; 411, bottom mold mounting part; 412, column part; 413, top connecting piece part; 414, bottom connecting piece part; 415, pressing column mounting part; 42, leveling base plate; 43, adjusting bolt; 44, hook. DETAILED DESCRIPTION

[0052] The following description of exemplary embodiments of the present disclosure is made in conjunction with the accompanying drawings, including various details of the embodiments of the present disclosure to facilitate understanding. These details should be considered as merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present disclosure. Similarly, for the sake of clarity and conciseness, descriptions of well-known functions and structures are omitted in the following description.

[0053] As used herein, the term "including" and its variations represent open inclusion, i.e., "including but not limited to." Unless otherwise stated, the term "or" means "and / or." The term "based on" means "based at least in part on." The terms "an example embodiment" and "an embodiment" mean "at least one example embodiment." The term "another embodiment" means "at least one additional embodiment." The terms "first," "second," etc. may refer to different or the same objects. Other explicit and implicit definitions may also be included below.

[0054] In order to at least partially solve one or more of the above problems and other potential problems, the embodiments of the present disclosure provide a three-step pressing machine for automobile door covers, such as Figures 1 to 12 As shown, it includes a base unit 4, a bottom mold unit 3, a pressing unit and a pressing unit 2; Figure 2 As shown, the base unit 4 is fixed on the foundation; specifically, the base unit 4 includes an integrated base frame 41 and several leveling base plates 42; the integrated base frame 41 includes a bottom mold mounting portion 411, several column portions 412, several top connecting piece portions 413, several bottom connecting piece portions 414 and two pressing column mounting portions 415; the bottom mold mounting portion 411 matches the parts to be pressed; the column portion 412 is vertically arranged, and the several column portions 412 are fixedly distributed around the bottom mold mounting portion 411; the top connecting piece portion 413 and the bottom connecting piece portion 414 are horizontally arranged, and the several top connecting pieces 137 and the several bottom connecting piece portions 414 are all around Along the bottom mold mounting portion 411, a plurality of top connecting pieces 413 are fixedly connected between the top ends of two adjacent pillars 412 and are fixedly connected to the side of the bottom mold mounting portion 411. A plurality of bottom connecting pieces 414 are fixedly connected between the bottom ends of two adjacent pillars 412 and are fixedly connected to the side of the bottom mold mounting portion 411. Two press column mounting portions 415 are fixedly connected to the top ends of two oppositely disposed pillars 412. A plurality of leveling base plates 42 are horizontally disposed below the plurality of bottom connecting pieces 414, with adjustment bolts 43 connected between the corresponding upper and lower bottom connecting pieces 414 and the leveling base plates 42. Preferably, the base unit 4 also includes a plurality of hooks 44, which are fixedly connected to the plurality of top connecting pieces 413.

[0055] like Figure 3As shown, the bottom mold unit 3 is fixedly mounted on the base unit 4; specifically, the bottom mold unit 3 includes a bottom mold 31, a support block 32, a plurality of suction cups 33 and a plurality of positioning spring pins 34; the bottom mold 31 matches the parts to be pressed, and the bottom mold 31 is fixedly mounted on the bottom mold mounting portion 411. The middle part of the bottom mold 31 is a concave cavity, and the support block 32 is fixedly arranged in the concave cavity in the middle part of the bottom mold 31. A plurality of suction cups 33 are evenly and fixedly arranged on the upper surface of the inner side of the periphery of the bottom mold 31, and a plurality of positioning spring pins 34 are fixedly arranged on the outer surface of the periphery of the bottom mold 31.

[0056] like Figure 1 、 Figures 7 to 11 As shown, the pressing unit includes a plurality of three-step pressing modules 1 that act independently, and the plurality of three-step pressing modules 1 are distributed around the base unit 4; the three-step pressing module 1 includes a fixed frame 11, a vertical sliding group, a horizontal sliding group and an insert assembly that are connected in sequence; the fixed frame 11 is fixedly connected to the base unit 4, specifically, the fixed frames 11 of the plurality of three-step pressing modules 1 are respectively fixedly connected to a plurality of top connecting pieces 413, and their positions are fixed during the pressing process.

[0057] The vertical sliding group includes a vertical movable frame 121 and a vertical driving assembly; the vertical movable frame 121 is slidably connected to the fixed frame 11 along the vertical direction; the vertical driving assembly is connected between the fixed frame 11 and the vertical movable frame 121, and is used to drive the vertical movable frame 121 to slide relative to the fixed frame 11 along the vertical direction; specifically, the vertical driving assembly includes a motor 122, a driving wheel 123, a driven wheel 124, a belt 125, a screw 126, and a nut 127; the motor 122 adopts a servo variable frequency motor 122 equipped with an absolute encoder, and the motor 122 is fixedly connected to the vertical movable frame 121; the driving wheel 123, the driven wheel 124 The wheel 124 and the belt 125 are both installed in the installation box 1210, the output shaft of the motor 122 passes through the top surface of the installation box 1210, and is coaxially fixedly connected to the driving wheel 123, the driven wheel 124 and the driving wheel 123 are on the same horizontal plane, and the belt 125 is simultaneously sleeved between the driving wheel 123 and the driven wheel 124; the screw 126 is vertically arranged, the bottom end of the screw 126 passes through the top surface of the installation box 1210, and is coaxially fixedly connected to the driven wheel 124, the screw 126 is rotatably connected to the vertical movable frame 121; the nut 127 is sleeved on the screw 126 and is threadedly connected to the screw 126, and the nut 127 is fixedly connected to the fixed frame 11.

[0058] In a preferred embodiment, a sliding assembly is provided between the vertical movable frame 121 and the fixed frame 11. Preferably, two sets of sliding assemblies are provided, each comprising a guide rail 128 and a slider 129. The guide rails 128 in each set of sliding assemblies are vertically arranged and fixedly connected to opposite sides of the vertical movable frame 121. The sliders 129 in each set of sliding assemblies are fixedly connected to opposite locations of the fixed frame 11. The sliders 129 and the guide rails 128 in the same set slide in a vertically sliding connection. Preferably, dust shields 111 are fixedly connected to opposite locations of the fixed frame 11. The two dust shields 111 respectively cover the guide rails 128 in each set of sliding assemblies and slide in a vertically sliding connection with the corresponding guide rails 128. Preferably, corresponding travel scales and pointers 1211 are provided on the vertical movable frame 121 and the fixed frame 11, respectively, for position correction during mechanism debugging.

[0059] The horizontal sliding group includes a guide groove seat 131, a slide plate 132 and a horizontal driving member; the guide groove seat 131 is horizontally arranged and fixedly connected to the top of the vertical movable frame 121; the slide plate 132 matches the guide groove seat 131, and the slide plate 132 is horizontally arranged in the guide groove seat 131 and is connected to the guide groove seat 131 along the horizontal direction. Preferably, a friction plate 136 is connected between the bottom surface of the guide groove seat 131 and the bottom surface of the slide plate 132, and the top of the two side walls of the guide groove seat 131 are respectively fixedly connected to the horizontally arranged cover plate 1 35, the extension direction of the cover plate 135 is the same as the extension direction of the guide groove seat 131; the horizontal driving member is connected to the slide plate 132, and is used to drive the slide plate 132 to slide horizontally in the guide groove seat 131. Specifically, the horizontal driving member adopts a driving cylinder 133, and the driving cylinder 133 is fixedly connected to the top of the vertical movable frame 121 through the connecting seat 134. A connecting piece 137 is fixedly connected to the bottom surface of the slide plate 132, and the end of the piston rod of the driving cylinder 133 is fixedly connected to the connecting piece 137.

[0060] The insert assembly includes a mounting seat 141, a final pressing insert 142 and a pre-pressing insert 143; the mounting seat 141 is fixedly connected to the first end of the top surface of the slide 132, specifically, the mounting seat 141 includes a mounting plate 1411 and a mounting frame 1412, the bottom surface of the mounting frame 1412 is fixedly connected to the top surface of the slide 132, the mounting plate 1411 is vertically arranged at the first end of the top surface of the slide 132, and the mounting plate 1411 is fixedly connected to the side of the mounting frame 1412; the final pressing insert 142 and the pre-pressing insert 143 are arranged up and down, and are both fixedly connected to the side of the mounting plate 1411 away from the mounting frame 1412; the bottom end of the pre-pressing insert 143 is provided with a first pre-pressing working surface 1431 (such as Figure 12 a) and the second pre-pressing working surface 1432 (as shown in FIG. Figure 12As shown in b), the inclination of the first pre-pressing working surface 1431 is greater than the inclination of the second pre-pressing working surface 1432; the bottom end of the final pressing insert 142 is provided with a final pressing working surface (as shown in Figure 12 (as shown in c).

[0061] The horizontal sliding group drives the insert assembly to reciprocate horizontally between the first pressing start position and the pre-pressing preparation position, between the second pressing start position and the pre-pressing and preparation position, and between the final pressing start position and the final pressing preparation position; the vertical sliding group drives the insert assembly to reciprocate vertically between the first pressing start position and the first pressing end position, between the second pressing start position and the second pressing end position, between the final pressing start position and the final pressing end position, and between the pre-pressing preparation position and the final pressing preparation position; when the insert assembly moves from the first pressing start position to the first pressing end position, the part to be pressed contacts the first pre-pressing working surface 1431; when the insert assembly moves from the second pressing start position to the second pressing end position, the part to be pressed contacts the second pre-pressing working surface 1432.

[0062] The module of this application can control the operation of the vertical sliding group and the horizontal sliding group through the control system of the three-step pressing machine, so that the insert assembly is respectively located at the pre-pressing preparation position, the first pressing start position, the first pressing end position, the second pressing start position, the second step pressing end position, the final pressing preparation position, the final pressing start position and the final pressing end position. In a preferred embodiment, the module of this application also includes a first stop assembly, a second stop assembly, a first limiting assembly and a second limiting assembly. The first stop assembly is used to mechanically protect the insert assembly at the first pressing start position and the first pressing end position and the positions therebetween. The second stop assembly is used to mechanically protect the insert assembly at the second pressing start position and the second pressing end position and the positions therebetween, and at the final pressing start position and the final pressing end position and the positions therebetween. The first limiting assembly is used to mechanically protect the insert assembly at the first pressing end position and the second pressing end position and the positions therebetween. The second limiting assembly is used to mechanically protect the insert assembly at the final pressing end position and the final pressing end position.

[0063] Specifically, the first stop assembly includes a stop cylinder 151, a first stop block 152 and a second stop block 153; a through hole is opened on the slide 132; the stop cylinder 151 is fixedly connected to the slide 132, and the piston rod of the stop cylinder 151 is passed through the through hole and moves along the vertical direction, and the first stop block 152 is fixedly connected to the free end of the piston rod of the stop cylinder 151; the second stop block 153 is fixedly connected to the top surface of the guide groove seat 131, and the direction from the first stop block 152 to the second stop block 153 is the same as the sliding direction of the slide 132; when the first stop block 152 is connected to the second stop block 153, the insert assembly is in the first step pressing start position or the first step pressing end position or a position between the first step pressing start position and the first step pressing end position. The second stop assembly includes a third stop block 161 and a fourth stop block 162, which are respectively fixedly connected to both sides of the first end of the guide groove seat 131, and both correspond to the first end of the slide 132, and the distance between the third stop block 161 and the fourth stop block 162 is smaller than the dimension of the slide 132 along a direction perpendicular to its sliding direction; when the two sides of the first end of the slide 132 are respectively connected to the third stop block 161 and the fourth stop block 162, the insert assembly is in the second step pressing start position, or the second step pressing end position, or a position between the second step pressing start position and the second step pressing end position, or the final pressing start position, or the final pressing end position, or a position between the final pressing start position and the final pressing end position.

[0064] The first limiting assembly includes a first limiting block 171 and a second limiting block 172. The first limiting block 171 is fixedly connected to the first end of the bottom surface of the slide 132, and the second limiting block 172 is fixedly connected to the top of the fixed frame 11 or the outer wall of the bottom mold 31 of the three-step pressing machine. In this embodiment, the second limiting block 172 is fixedly connected to the outer wall of the bottom mold 31. When the insert assembly moves from the first step pressing start position to the first step pressing end position and from the second step pressing start position to the second step pressing end position, the first limiting block 171 is located directly above the second limiting block 172, and when the first limiting block 171 is connected to the second limiting block 172, the insert assembly is at the first step pressing end position or the second step pressing end position. The second limit block includes a third limit block 181 and a fourth limit block 182. The third limit block 181 is fixedly connected to the top of the vertical movable frame 121, and the fourth limit block 182 is fixedly connected to the top of the fixed frame 11. When the insert assembly moves from the final pressing start position to the final pressing end position, the third limit block 181 is located directly above the fourth limit block 182, and when the third limit block 181 is connected to the fourth limit block 182, the insert assembly is in the final pressing end position.

[0065] Preferably, a plurality of position sensors 19 are installed on the guide groove seat 131 for detecting the position of the slide plate 132 relative to the guide groove seat 131 and transmitting signals to the control system of the three-step pressing machine.

[0066] like Figures 4 to 6 As shown, the pressing unit 2 includes two pressing columns 21, a driving assembly and a pressing plate 22. The pressing columns 21 are fixed on the base unit 4. Specifically, the bottom ends of the two pressing columns 21 are respectively fixedly connected to the top surfaces of the two pressing column mounting portions 415; the driving assembly is installed on the pressing columns 21, and the pressing plate 22 is connected to the driving assembly for driving the pressing plate 22 to approach or move away from the bottom die unit 3. When the pressing plate 22 approaches the bottom die unit 3, the pressing plate 22 is located directly above the bottom die unit 3; specifically, the driving assembly includes a flip servo motor 23, a connecting rod mechanism 24, a rotating beam 25, two cantilevers 26, a pressing cylinder 27, a connecting plate 28 and a guide column 29; the two ends of the rotating beam 25 are respectively rotatably connected to the top ends of the two pressing columns 21 through a rotating shaft 251, and the flip servo motor 23 is fixed to one side of the pressing column 21; the output end of the flip servo motor 23 is connected to the connecting rod mechanism 24 The connection, the connecting rod mechanism 24 is connected to the rotating cross beam 25, and is used to drive the rotating cross beam 25 to rotate, so as to realize the switching of the pressing plate 22 between the open position and the pressing position. When the pressing plate 22 swings to the pressing position, the connecting rod mechanism 24 is just in the mechanical dead point position. Preferably, safety lock pins 213 are connected to both ends of the rotating cross beam 25. When the pressing plate 22 swings to the pressing position, the safety lock pin 213 is inserted into the limit hole on the pressing column 21 for mechanical locking; the first ends of the two cantilevers 26 are fixedly connected to the middle area of ​​the rotating cross beam 25, and the pressing cylinder 27 is fixedly connected between the second ends of the two cantilevers 26, and the piston rod of the pressing cylinder 27 is fixedly connected to the connecting plate 28, and the connecting plate 28 is arranged parallel to and fixedly connected to the pressing plate 22; the guide column 29 is connected between the second end of the cantilever 26 and the connecting plate 28, and the extension direction of the guide column 29 is the same as the extension direction of the piston rod of the pressing cylinder 27. Preferably, the second end of the cantilever 26 is fixedly connected to a flip swing arm cylinder 210, and a pressure block is fixedly connected to the free end of the swing arm of the flip swing arm cylinder 210. During operation, the flip swing arm cylinder 210 drives the pressure block to connect with the clamping surface of the pressure plate 22.

[0067] An auxiliary pressing assembly 221 is installed on the pressing plate 22, and the auxiliary pressing assembly 221 includes an auxiliary pressing cylinder 27 and a pressing piece. The auxiliary pressing cylinder 27 is fixedly connected to the pressing plate 22; the inclination of the outer side surface of the pressing piece is equal to the inclination of the first expected deformation of the part to be pressed, and the piston rod of the auxiliary pressing cylinder 27 is fixedly connected to the pressing piece. When the insert assembly moves from the starting position of the first step of pressing to the ending position of the first step of pressing, the pressing piece is connected to the part to be pressed.

[0068] In a preferred embodiment, the bottom mold unit 3 also includes a plurality of first limiting columns 35, which are distributed along the periphery of the bottom mold 31, and the bottom ends of the first limiting columns 35 are fixedly connected to the outer side surfaces of the periphery of the bottom mold 31; a plurality of second limiting columns 222 are provided on the pressing plate 22, which are distributed along the periphery of the pressing plate 22, and the top ends of the second limiting columns 222 are fixedly connected to the edge of the pressing plate 22; during operation, the first limiting columns 35 correspond one-to-one with the second limiting columns 222, and the top ends of the corresponding first limiting columns 35 are connected to the bottom ends of the second limiting columns 222. Preferably, the top ends of the corresponding first limiting columns 35 are plugged or clamped with the bottom ends of the second limiting columns 222.

[0069] In a preferred embodiment, a safety component is provided on the pressing column 21, and the safety component includes a manual locking pin 211, an indicator light 212 and a conductive part; the locking pin portion of the manual locking pin 211 is made of conductive material, and the manual locking pin 211 and the conductive part are installed on the pressing column 21; the indicator light 212 is fixedly connected to the top of the pressing column 21, and the indicator light 212 is electrically connected to the conductive part and the locking pin portion. When the locking pin portion is connected to the conductive part, the indicator light 212 lights up, which is used as a prompt during maintenance.

[0070] The present application also provides a three-step pressing method for automobile door covers, such as Figure 13 As shown, a three-step pressing machine for automobile door covers as described above is used. Preferably, the three-step pressing module 1 includes a stop cylinder 151, a first stop block 152, a second stop block 153, a third stop block 161, a fourth stop block 162, a first limit block 171, a second limit block 172, a third limit block 181 and a fourth limit block 182, and includes the following steps:

[0071] Step 1: Place the outer panel part and the inner panel part on the bottom mold 31, operate the drive assembly to move the pressing plate 22 to contact the inner panel part and apply a pressing force. At this time, the insert assembly is in a pre-pressing preparation position;

[0072] Step 2: The auxiliary pressing cylinder 27 drives the pressing piece downward to connect with the outer panel part at the position to be pressed;

[0073] Preferably, step a is provided between step 2 and step 3, and step a is: operating the stop cylinder 151 so that the first stop block 152 extends out of the slide plate 132;

[0074] Step 3: Drive the horizontal sliding group to move the insert assembly from the pre-pressing preparation position to the first pressing start position (at this time, the first stop block 152 is connected to the second stop block 153, and the first limit block 171 is located directly above the second limit block 172);

[0075] Step 4: Operate the vertical sliding group to move the insert assembly downward from the first pressing start position to the first pressing end position (at this time, the first stop block 152 is connected to the second stop block 153, and the first limit block 171 is connected to the second limit block 172). During this process, the first pre-pressing working surface 1431 of the pre-pressing insert 143 contacts the outer panel part and causes it to deform. When the insert assembly is in the first pressing end position, the outer panel part reaches the first expected deformation (the part is parallel to the pressing sheet at the first expected deformation), and the vertical sliding group is stopped.

[0076] Step 5: operating the vertical sliding group to move the insert assembly upward from the first pressing end position to the first pressing start position;

[0077] Step 6: The auxiliary pressing cylinder 27 drives the pressing sheet upward to its original position;

[0078] Preferably, step b is provided between step 6 and step 7, and step b is: driving the horizontal sliding group to move the insert assembly from the first pressing start position to the pre-pressing preparation position; operating the stop cylinder 151 to retract the first stop block 152;

[0079] Step 7: Drive the horizontal sliding group to move the insert assembly to the second pressing start position (at this time, both sides of the first end of the slide plate 132 are connected to the third stop block 161 and the fourth stop block 162 respectively, and the first limit block 171 is located directly above the second limit block 172);

[0080] Step 8: Run the vertical sliding group to move the insert assembly downward from the second pressing start position to the second pressing end position (at this time, the two sides of the first end of the slide plate 132 are respectively connected to the third stop block 161 and the fourth stop block 162, and the first limit block 171 is connected to the second limit block 172). During this process, the second pre-pressing working surface 1432 of the pre-pressing insert 143 contacts the outer panel part deformed in step 4 and causes it to deform. When the insert assembly is in the second pressing end position, the outer panel part reaches the second expected deformation, and the vertical sliding group stops running;

[0081] Step 9: Operate the vertical sliding group to move the insert assembly upward from the second pressing end position to the second pressing start position; drive the horizontal sliding group to move the insert assembly from the second pressing start position to the pre-pressing preparation position;

[0082] Step 10: operating the vertical sliding group to move the insert assembly from the pre-pressing preparation position to the final pressing preparation position;

[0083] Step 11: Drive the horizontal sliding group to move the insert assembly from the final pressing preparation position to the final pressing start position (at this time, both sides of the first end of the slide plate 132 are connected to the third stop block 161 and the fourth stop block 162 respectively, and the third limit block 181 is located directly above the fourth limit block 182);

[0084] Step 12: Operate the vertical sliding group to move the insert assembly downward from the final pressing start position to the final pressing end position (at this time, the two sides of the first end of the slide plate 132 are respectively connected to the third stop block 161 and the fourth stop block 162, and the third limit block 181 is connected to the fourth limit block 182). During this process, the final pressing working surface of the final pressing insert 142 contacts and deforms the outer panel part after deformation in step 8. When the insert assembly is at the final pressing end position, the outer panel part reaches the final expected deformation, and the vertical sliding group stops operating;

[0085] Step 13: operating the vertical sliding group to move the insert assembly upward from the final pressing end position to the final pressing start position; driving the horizontal sliding group to move the insert assembly from the final pressing start position to the final pressing preparation position;

[0086] Step 14: Operate the vertical sliding group to move the insert assembly from the final pressing preparation position to the pre-pressing preparation position.

[0087] While various embodiments of the present disclosure have been described above, the foregoing description is intended to be illustrative, non-exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, their practical applications, or technological improvements in the marketplace, or to enable others skilled in the art to understand this document.

Claims

1. A three-step pressing machine for automobile door covers, characterized by: It comprises a base unit (4), a bottom mold unit (3), a pressing unit and a material pressing unit (2); The base unit (4) is fixed on the foundation; the bottom mold unit (3) is fixedly installed on the base unit (4); The pressing unit comprises a plurality of three-step pressing modules (1) that can act independently, and the plurality of three-step pressing modules (1) are distributed around a base unit (4); the three-step pressing module (1) comprises a fixed frame (11), a vertical sliding group, a horizontal sliding group and an insert assembly that are connected in sequence, the fixed frame (11) is fixedly connected to the base unit (4), the insert assembly comprises a final pressing insert (142) and a pre-pressing insert (143), and a first pre-pressing working surface (1431) and a second pre-pressing working surface (1432) are provided on the bottom end of the pre-pressing insert (143); the horizontal sliding group drives the insert assembly to reciprocate horizontally between a first pressing start position and a pre-pressing preparation position, between a second pressing start position and a pre-pressing preparation position, and between a final pressing start position and a final pressing preparation position; The vertical sliding group drives the insert assembly to reciprocate vertically between the first pressing start position and the first pressing end position, between the second pressing start position and the second pressing end position, between the final pressing start position and the final pressing end position, and between the pre-pressing preparation position and the final pressing preparation position; when the insert assembly moves from the first pressing start position to the first pressing end position, the part to be pressed contacts the first pre-pressing working surface (1431); when the insert assembly moves from the second pressing start position to the second pressing end position, the part to be pressed contacts the second pre-pressing working surface (1432); The pressing unit (2) includes two pressing columns (21), a driving assembly and a pressing plate (22). The pressing columns (21) are fixed on the base unit (4), the driving assembly is installed on the pressing columns (21), and the pressing plate (22) is connected to the driving assembly and is used to drive the pressing plate (22) to approach or move away from the bottom die unit (3). When the pressing plate (22) approaches the bottom die unit (3), the pressing plate (22) is located directly above the bottom die unit (3); a pressing plate (22) is installed on the pressing plate (22). An auxiliary pressing assembly (221) is provided, comprising an auxiliary pressing cylinder (27) and a pressing sheet. The auxiliary pressing cylinder (27) is fixedly connected to the pressing plate (22); the inclination of the outer side surface of the pressing sheet is equal to the inclination of the first expected deformation of the position to be pressed; the piston rod of the auxiliary pressing cylinder (27) is fixedly connected to the pressing sheet; when the insert assembly moves from the first pressing start position to the first pressing end position, the pressing sheet is connected to the position to be pressed.

2. The three-step pressing machine for automobile door covers according to claim 1, characterized in that: The base unit (4) includes an integrated base frame (41) and a plurality of leveling base plates (42); the integrated base frame (41) includes a bottom mold mounting portion (411), a plurality of column portions (412), a plurality of top connecting pieces (413), a plurality of bottom connecting pieces (414) and two pressing column mounting portions (415); the bottom mold mounting portion (411) matches the part to be pressed; the column portion (412) is vertically arranged, and the plurality of column portions (412) are fixedly distributed around the bottom mold mounting portion (411); the top connecting piece portion (413) and the bottom connecting piece portion (414) are horizontally arranged, and the plurality of top connecting pieces (137) and the plurality of bottom connecting pieces (414) are distributed around the bottom mold mounting portion (411), and the plurality of top connecting pieces (413) are respectively fixedly connected to two adjacent column portions (412). ) and are fixedly connected to the side of the bottom mold mounting portion (411); a plurality of bottom connecting pieces (414) are respectively fixedly connected between the bottom ends of two adjacent column portions (412) and are respectively fixedly connected to the side of the bottom mold mounting portion (411); two pressing column mounting portions (415) are respectively fixedly connected to the top ends of two oppositely arranged column portions (412); a plurality of leveling bottom plates (42) are respectively horizontally arranged below the plurality of bottom connecting pieces (414), and adjusting bolts (43) are connected between the upper and lower corresponding bottom connecting pieces (414) and the leveling bottom plates (42); the fixed frames (11) of the plurality of three-step pressing modules (1) are respectively fixedly connected to the plurality of top connecting pieces (413), and the bottom ends of the two pressing columns (21) are respectively fixedly connected to the top surfaces of the two pressing column mounting portions (415).

3. The three-step pressing machine for automobile door covers according to claim 2, characterized in that: The base unit (4) further comprises a plurality of hooks (44), and the plurality of hooks (44) are respectively fixedly connected to the plurality of top connecting pieces (413).

4. The three-step pressing machine for automobile door covers according to claim 2, characterized in that: The bottom mold unit (3) comprises a bottom mold (31), a support block (32), a plurality of suction cups (33) and a plurality of positioning spring pins (34); the bottom mold (31) matches the part to be pressed, the bottom mold (31) is fixedly mounted on the bottom mold mounting portion (411), the middle portion of the bottom mold (31) is a concave cavity, the support block (32) is fixedly arranged in the concave cavity in the middle portion of the bottom mold (31), the plurality of suction cups (33) are evenly and fixedly arranged on the upper surface of the inner side of the bottom mold (31), and the plurality of positioning spring pins (34) are fixedly arranged on the outer surface of the outer side of the bottom mold (31).

5. The three-step pressing machine for automobile door covers according to claim 4, characterized in that: The bottom mold unit (3) further comprises a plurality of first limiting columns (35), which are distributed along the periphery of the bottom mold (31), and the bottom ends of the plurality of first limiting columns (35) are fixedly connected to the outer side surface of the periphery of the bottom mold (31); a plurality of second limiting columns (222) are provided on the pressing plate (22), which are distributed along the periphery of the pressing plate (22), and the top ends of the plurality of second limiting columns (222) are fixedly connected to the edge of the pressing plate (22); during operation, the plurality of first limiting columns (35) correspond to the plurality of second limiting columns (222) one by one, and the top ends of the corresponding first limiting columns (35) are connected to the bottom ends of the second limiting columns (222).

6. The three-step pressing machine for automobile door covers according to claim 4, characterized in that: The horizontal sliding group includes a guide groove seat (131), a slide plate (132) and a horizontal driving member; the guide groove seat (131) is fixed to the top of the vertical movable frame (121), and the slide plate (132) is arranged in the guide groove seat (131) and is connected to the guide groove seat (131) in a sliding manner along the horizontal direction; the horizontal driving member is connected to the slide plate (132) and is used to drive the slide plate (132) to slide in the guide groove seat (131) in a horizontal direction; the three-step pressing module (1) also includes a first limiting component, and the first limiting component includes a first limiting block (171) and a second limiting block (172) The first limiting block (171) is fixedly connected to the first end of the bottom surface of the slide plate (132), and the second limiting block (172) is fixedly connected to the outer side wall of the bottom mold (31); when the insert assembly moves from the first step pressing start position to the first step pressing end position and from the second step pressing start position to the second step pressing end position, the first limiting block (171) is located directly above the second limiting block (172), and when the first limiting block (171) is connected to the second limiting block (172), the insert assembly is at the first step pressing end position or the second step pressing end position.

7. The three-step pressing machine for automobile door covers according to claim 1, characterized in that: The driving assembly comprises a tilting servo motor (23), a connecting rod mechanism (24), a rotating beam (25), two cantilevers (26), a pressing cylinder (27), a connecting plate (28) and a guide column (29); the two ends of the rotating beam (25) are respectively connected to the top ends of the two pressing columns (21) for rotation, the tilting servo motor (23) is fixed on one side of the pressing column (21), the output end of the tilting servo motor (23) is connected to the connecting rod mechanism (24), and the connecting rod mechanism (24) is connected to the rotating beam (25) for driving the rotating servo motor (23). The rotating crossbeam (25) rotates; the first ends of the two cantilevers (26) are fixedly connected to the middle area of ​​the rotating crossbeam (25); the pressing cylinder (27) is fixedly connected between the second ends of the two cantilevers (26); the piston rod of the pressing cylinder (27) is fixedly connected to the connecting plate (28); the connecting plate (28) is arranged parallel to and fixedly connected to the pressing plate (22); the guide column (29) is connected between the second end of the cantilever (26) and the connecting plate (28); the extension direction of the guide column (29) is the same as the extension direction of the piston rod of the pressing cylinder (27).

8. The three-step pressing machine for automobile door covers according to claim 7, characterized in that: The second end of the cantilever (26) is fixedly connected to a tilting swing arm cylinder (210), and a pressure block is fixedly connected to the free end of the swing arm of the tilting swing arm cylinder (210). During operation, the tilting swing arm cylinder (210) drives the pressure block to connect with the clamping surface of the pressure plate (22).

9. The three-step pressing machine for automobile door covers according to claim 1, characterized in that: The press column (21) is provided with a safety component, which includes a manual lock pin (211), an indicator light (212) and a conductive member; the lock pin portion of the manual lock pin (211) is made of conductive material, and the manual lock pin (211) and the conductive member are installed on the press column (21); the indicator light (212) is fixedly connected to the top of the press column (21), and the indicator light (212) is electrically connected to the conductive member and the lock pin portion. When the lock pin portion is connected to the conductive member, the indicator light (212) lights up.

10. A three-step pressing method for automobile door covers, using the three-step pressing machine for automobile door covers according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Place the outer panel part and the inner panel part on the bottom mold (31), operate the driving assembly to move the pressing plate (22) to contact the inner panel part and apply a pressing force, at which time the insert assembly is in a pre-pressing preparation position; Step 2: The auxiliary pressing cylinder (27) drives the pressing piece downward to connect with the outer panel part at the position to be pressed; Step 3: driving the horizontal sliding group to move the insert assembly from the pre-pressing preparation position to the first pressing start position; Step 4: operating the vertical sliding group so that the insert assembly moves downward from the first pressing start position to the first pressing end position. During this process, the first pre-pressing working surface (1431) of the pre-pressing insert (143) contacts the outer panel part and causes it to deform. When the insert assembly is at the first pressing end position, the outer panel part reaches the first expected deformation, and the operation of the vertical sliding group is stopped. Step 5: operating the vertical sliding group to move the insert assembly upward from the first pressing end position to the first pressing start position; Step 6: The auxiliary pressing cylinder (27) drives the pressing sheet upward to its original position; Step 7: driving the horizontal sliding group to move the insert assembly to the second pressing start position; Step 8: operating the vertical sliding group so that the insert assembly moves downward from the second pressing start position to the second pressing end position. During this process, the second pre-pressing working surface (1432) of the pre-pressing insert (143) contacts the outer panel part deformed in step 4 and causes it to deform. When the insert assembly is at the second pressing end position, the outer panel part reaches the second expected deformation, and the operation of the vertical sliding group is stopped. Step 9: Operate the vertical sliding group to move the insert assembly upward from the second pressing end position to the second pressing start position; drive the horizontal sliding group to move the insert assembly from the second pressing start position to the pre-pressing preparation position; Step 10: operating the vertical sliding group to move the insert assembly from the pre-pressing preparation position to the final pressing preparation position; Step 11: driving the horizontal sliding group to move the insert assembly from the final pressing preparation position to the final pressing start position; Step 12: operating the vertical sliding group so that the insert assembly moves downward from the final pressing start position to the final pressing end position. During this process, the final pressing working surface of the final pressing insert (142) contacts the outer panel part deformed in step 8 and causes it to deform. When the insert assembly is at the final pressing end position, the outer panel part reaches the final expected deformation, and the vertical sliding group is stopped. Step 13: operating the vertical sliding group to move the insert assembly upward from the final pressing end position to the final pressing start position; driving the horizontal sliding group to move the insert assembly from the final pressing start position to the final pressing preparation position; Step 14: Operate the vertical sliding group to move the insert assembly from the final pressing preparation position to the pre-pressing preparation position.

Images