Special three-step pressing machine and method for automobile door cover

Abstract

The invention discloses a special three-step press-fit machine and method for an automobile door cover. The special three-step press-fit machine comprises a base unit, a bottom die unit, a press-fit unit and a pressing unit, wherein the bottom die unit, the press-fit unit and the pressing unit are connected to the base unit; the press-fit unit comprises a plurality of three-step press-fit modules which are distributed around the base unit and act independently, each three-step press-fit module comprises a fixed rack, a vertical sliding set, a horizontal sliding set and an insert assembly which are sequentially connected, and each insert assembly comprises a final press-fit insert and a pre-press-fit insert. A first pre-pressing working surface and a second pre-pressing working surface are arranged at the bottom end of the pre-pressing insert; the material pressing unit comprises two material pressing stand columns, a driving assembly and a material pressing plate. An auxiliary material pressing assembly is installed on the material pressing plate and comprises an auxiliary material pressing air cylinder and a material pressing piece, and the auxiliary material pressing air cylinder is fixedly connected to the material pressing plate. The inclination of the outer side face of the material pressing piece is equal to that of first expected deformation of the position to be pressed, and a piston rod of the auxiliary material pressing air cylinder is fixedly connected with the material pressing piece. According to the invention, three-step pressing of a large-angle opening on a part can be realized.

Description

Technical Field

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

[0002] At present, in major automobile body-in-white door cover production lines, special machine pressing technology has been widely used in the pressing and hemming connection of the inner and outer panels of the body-in-white door cover. The main application parts are left and right front doors, left and right rear doors, front cover and rear cover, etc., with the advantages of stable process and fast production speed. However, the pressing technology and production equipment of the door cover have problems such as high equipment prices and difficulties in technical improvement. In addition, the flange opening angles at some positions of the four-door and two-cover outer panels are large, and the large-angle openings must be pressed in three steps to achieve complete pressing.

[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 which has high stability, high precision, high working efficiency and can realize three-step pressing.

[0005] The present invention provides a three-step pressing machine for automobile door covers, comprising a base unit, a bottom mold unit, a pressing unit and a pressing unit; the base unit is fixed on a foundation; the bottom mold unit is fixedly mounted on the base unit; the pressing unit comprises a plurality of three-step pressing modules which 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 which 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 A first pre-pressing working surface and a second pre-pressing working surface are arranged on the bottom end of the insert block; the horizontal sliding group drives the insert block 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 block 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 start position and the pre-pressing preparation 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 component and a pressing plate, the pressing columns are fixed on the base unit, the driving component is installed on the pressing columns, and the pressing plate is connected to the driving component 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 sheet. The auxiliary pressing cylinder is fixedly connected to the pressing plate. The inclination of the outer side surface of the pressing sheet 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 sheet. 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 sheet is connected to the place to be pressed.

[0006] Preferably, the base unit includes an integrated base frame and a plurality of leveling bottom plates; the integrated base frame includes a bottom mold mounting portion, a plurality of column portions, a plurality of top connecting sheet portions, a plurality of bottom connecting sheet 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 a plurality of column portions are fixedly distributed around the bottom mold mounting portion; the top connecting sheet portion and the bottom connecting sheet portion are horizontally arranged, and a plurality of top connecting sheets and a plurality of bottom connecting sheet portions are distributed around the bottom mold mounting portion, and a plurality of top connecting sheet 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 fixedly connected, and a plurality of bottom connecting pieces are respectively fixedly connected between the bottom ends of two adjacent column parts and are all fixedly connected to the side of the bottom mold mounting part; two pressing column mounting parts are respectively fixedly connected to the top ends of two oppositely arranged column parts; a plurality of leveling bottom plates are respectively horizontally arranged below the plurality of bottom connecting pieces, and adjusting bolts are connected between the upper and lower corresponding bottom connecting pieces and the leveling bottom plates; the fixed frames of a plurality of three-step pressing modules are respectively fixedly connected to a plurality of 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 comprises a plurality of hooks, and the plurality of hooks are respectively fixedly connected to a 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 parts 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 on the inner side of the bottom mold periphery, and a plurality of positioning spring pins are fixedly arranged on the outer surface on the periphery of the bottom mold.

[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 edges 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 plate and a horizontal driving member; the guide groove seat is fixed at the top of the vertical movable frame, the slide plate is arranged in the guide groove seat and is slidably connected with the guide groove seat along the horizontal direction; the horizontal driving member is connected to the slide plate, and is used to drive the slide plate 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 plate, 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 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 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 end position or the second step pressing end 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, the connecting rod mechanism is connected to the rotating beam, and is used to drive 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 the pressing plate and fixedly connected; 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, and the safety component 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, and 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 a car door cover, using any of the three-step pressing machines for a car door cover described above, comprising the following steps:

[0015] Step 1: Place the outer panel parts and the inner panel parts on the bottom mold, operate the driving assembly to move the pressing plate to contact the inner panel parts and apply a 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 to connect with the outer panel part at the position 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 make the insert assembly move 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 deforms it. 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 sheet 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: operate the vertical sliding group to make the insert assembly move 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: operate the vertical sliding group to make the insert assembly move 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 the 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 is stopped;

[0027] Step 13: operate the vertical sliding group to move the insert assembly upward from the final pressing end position to the final pressing start position; drive 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) A vertical sliding group is designed on a fixed frame, a horizontal sliding group is arranged on the vertical sliding group, an insert assembly is designed on the horizontal sliding group, a final pressing insert and a pre-pressing insert are designed in the insert assembly and are distributed up and down, and a first pre-pressing working surface and a second pre-pressing working surface are designed on the pre-pressing insert, so 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 of the part in sequence; and an auxiliary pressing assembly is designed on the pressing plate, and 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 a 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 other 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 vertical sliding group and the horizontal sliding group are 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) The vertical sliding group is designed as a motor driving the driving wheel, the belt driving the driven wheel, and the screw nut pair is used to drive the insert assembly along the vertical direction. It has the characteristics of simple structure, stable and reliable transmission, strong buffering performance, and strong vibration absorption performance. It can effectively alleviate the impact of the force generated during the pressing process on the equipment; the horizontal sliding group is designed as a driving cylinder driving 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 structural stability is good and the processing cost is low.

[0034] (5) By designing the manual lock pin, indicator light and conductive parts, 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 the present application.

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

[0036] In order to better understand the above and other purposes, features, advantages and functions of the present invention, reference may be made to the embodiments shown in the accompanying drawings. The same reference numerals in the accompanying drawings refer to the same components. It should be understood by those skilled in the art that the accompanying drawings are intended to schematically illustrate the preferred embodiments of the present invention and have no limiting effect on the scope of the present invention, and the components in the drawings are not drawn to scale.

[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 pressing 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 material pressing unit at a first angle of a three-step pressing machine for automobile door covers according to an embodiment of the present invention is shown;

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

[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 at a first angle is shown;

[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 at a second angle is shown;

[0045] Fig. 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] Fig.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] Fig.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] Fig.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] Fig.13 A process schematic diagram of a three-step pressing method for a car 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 baffle; 112. Travel scale; 121. Vertical movable frame; 1211. Pointer; 122. Motor; 123. Driving wheel; 124. Driven wheel; 125. Belt; 126. Lead screw; 127. Nut; 128. Guide rail; 129. Slider; 1210. Installation box; 131. Guide groove 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 is a description of exemplary embodiments of the present disclosure in conjunction with the accompanying drawings, including various details of the embodiments of the present disclosure to facilitate understanding, which should be considered as merely exemplary. Therefore, it should be recognized by those of ordinary skill in the art that various changes and modifications 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 mean 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 the above problems and one or more of 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 a plurality of leveling bottom 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 a 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 a plurality of top connecting pieces 137 and a plurality of bottom connecting pieces 414 are arranged around The bottom mold mounting part 411 is distributed, and a plurality of top connecting pieces 413 are respectively fixedly connected between the top ends of two adjacent column parts 412 and are all fixedly connected to the side of the bottom mold mounting part 411; a plurality of bottom connecting pieces 414 are respectively fixedly connected between the bottom ends of two adjacent column parts 412 and are all fixedly connected to the side of the bottom mold mounting part 411; two pressing column mounting parts 415 are respectively fixedly connected to the top ends of two oppositely arranged column parts 412; a plurality of leveling bottom plates 42 are respectively horizontally arranged below a plurality of bottom connecting pieces 414, and an adjusting bolt 43 is connected between the corresponding bottom connecting pieces 414 and the leveling bottom plates 42. Preferably, the base unit 4 further includes a plurality of hooks 44, and the plurality of hooks 44 are respectively 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, 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 independently acting three-step pressing modules 1, 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 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 the 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 lead 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 belt 125, the lead screw 126, and the nut 127 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 lead screw 126 is vertically arranged, the bottom end of the lead screw 126 passes through the top surface of the installation box 1210, and is coaxially fixedly connected to the driven wheel 124, the lead screw 126 is rotatably connected to the vertical movable frame 121; the nut 127 is sleeved on the lead screw 126 and is threadedly connected to the lead 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, the sliding assembly is provided with two groups, and the sliding assembly includes a guide rail 128 and a slider 129; the guide rails 128 in the two groups of sliding assemblies are both vertically arranged and fixedly connected to the opposite two sides of the vertical movable frame 121, respectively, and the sliders 129 in the two groups of sliding assemblies are respectively fixedly connected to the opposite positions of the fixed frame 11, and the sliders 129 are slidably connected with the guide rails 128 in the same group along the vertical direction; preferably, dust baffles 111 are fixedly connected to the opposite positions of the fixed frame 11, and the two dust baffles 111 respectively cover the guide rails 128 in the two groups of sliding assemblies, and are slidably connected with the corresponding guide rails 128 along the vertical direction. Preferably, corresponding travel scales and pointers 1211 are respectively provided on the vertical movable frame 121 and the fixed frame 11 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 slidably 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 tops of the two side walls of the guide groove seat 131 are respectively fixedly connected with horizontally arranged cover plates 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 in the guide groove seat 131 along the horizontal direction. 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 a 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 Fig.12 a) and the second pre-pressing working surface 1432 (as shown in Fig.12As shown in FIG. 14b, the inclination of the first pre-pressing working surface 1431 is greater than the inclination of the second pre-pressing working surface 1432; a final pressing working surface (as shown in FIG. 143) is provided on the bottom end of the final pressing insert 142. Fig.12 (as shown in c).

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

[0062] The module of the present 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 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 the present 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 for mechanical protection and limiting 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 for mechanical protection and limiting the insert assembly at the second pressing start position and the second pressing end position and the positions therebetween, the final pressing start position and the final pressing end position and the positions therebetween; the first limiting assembly is used for mechanical protection and limiting the insert assembly at the first pressing end position and the second pressing end position; the second limiting assembly is used for mechanical protection and limiting the insert assembly at 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 plate 132; the stop cylinder 151 is fixedly connected to the slide plate 132, and the piston rod of the stop cylinder 151 is inserted in the through hole and moves in 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 plate 132; when the first stop block 152 is connected to the second stop block 153, the insert assembly is at the starting position of the first step pressing or the ending position of the first step pressing or a position between the starting position of the first step pressing and the ending position of the first step pressing. 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 plate 132, and the distance between the third stop block 161 and the fourth stop block 162 is smaller than the dimension of the slide plate 132 along a direction perpendicular to its sliding direction; when 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, the insert assembly is at the starting position of the second step pressing, or the ending position of the second step pressing, or a position between the starting position of the second step pressing and the ending position of the second step pressing, or the starting position of the final pressing, or the ending position of the final pressing, or a position between the starting position of the final pressing and the ending position of the final pressing.

[0064] The first limit block 171 and the second limit block 172, the first limit block 171 is fixedly connected to the first end of the bottom surface of the slide plate 132, and the second limit 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 limit 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 limit block 171 is located directly above the second limit block 172, and when the first limit block 171 is connected to the second limit 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 to detect the position of the slide plate 132 relative to the guide groove seat 131 and transmit 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, which is used to drive the pressing plate 22 to approach or move away from the bottom mold unit 3. When the pressing plate 22 approaches the bottom mold unit 3, the pressing plate 22 is located directly above the bottom mold 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 connecting rod mechanism 24 is connected with the rotating crossbeam 25 and is used to drive the rotating crossbeam 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 at both ends of the rotating crossbeam 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 crossbeam 25, and 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, and the connecting plate 28 is arranged parallel to the pressing plate 22 and fixedly connected; 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 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 place to be pressed, and the piston rod of the auxiliary pressing cylinder 27 is fixedly connected to the pressing sheet. 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 sheet is connected to the place 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 plurality of 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 arranged 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 one-to-one with the plurality of second limiting columns 222, and the corresponding top ends of the first limiting columns 35 are connected to the bottom ends of the second limiting columns 222. Preferably, the corresponding top ends of the first limiting columns 35 are plugged or clamped to 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 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 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 member and the lock pin portion. When the lock pin portion is connected to the conductive member, the indicator light 212 lights up for prompting during maintenance.

[0070] The present application also provides a three-step pressing method for automobile door covers, such as Fig.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, including the following steps:

[0071] 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;

[0072] Step 2: The auxiliary pressing cylinder 27 drives the pressing sheet 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: driving 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: Run the vertical sliding group to make the insert assembly move 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 deforms it. When the insert assembly is at 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 respectively connected to the third stop block 161 and the fourth stop block 162, and the first limit block 171 is located directly above the second limit block 172);

[0080] Step 8: Run the vertical sliding group to make the insert assembly move 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 deforms it. 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 is stopped;

[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: driving 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 respectively connected to the third stop block 161 and the fourth stop block 162, and the third limit block 181 is located directly above the fourth limit block 182);

[0084] Step 12: Run the vertical sliding group to make the insert assembly move 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 the outer panel part deformed in step 8 and deforms it. 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;

[0085] Step 13: operate the vertical sliding group to move the insert assembly upward from the final pressing end position to the final pressing start position; drive 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] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the present invention.

Claims

1. A three-step pressing machine for automobile door covers, characterized in that: 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 mounted 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 arranged 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 step pressing start position and the first step pressing end position, between the second step pressing start position and the second step 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 step pressing start position to the first step pressing end position, the part to be pressed contacts the first pre-pressing working surface (1431); when the insert assembly moves from the second step pressing start position to the second step pressing end position, the part to be pressed contacts the second pre-pressing working surface (1432); The pressing unit (2) comprises 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 driving assembly is installed on the pressing plate (22). An auxiliary pressing assembly (221) is provided, the auxiliary pressing assembly (221) comprising an auxiliary pressing cylinder (27) and a pressing sheet, the auxiliary pressing cylinder (27) being 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, and when the insert assembly moves from the first step pressing start position to the first step pressing end position, the pressing sheet is connected to the position to be pressed.

2. A three-step pressing machine for automobile door covers according to claim 1, characterized in that: The base unit (4) comprises an integrated base frame (41) and a plurality of leveling base plates (42); the integrated base frame (41) comprises 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. A 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), wherein the plurality of hooks (44) are respectively fixedly connected to a plurality of top connecting sheet portions (413).

4. A 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 side of the bottom mold (31).

5. A 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), the plurality of first limiting columns (35) 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 arranged on the pressing plate (22), the plurality of second limiting columns (222) 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 one to one with the plurality of 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).

6. A three-step pressing machine for automobile door covers according to claim 4, characterized in that: The horizontal sliding group comprises a guide groove seat (131), a slide plate (132) and a horizontal driving member; the guide groove seat (131) is fixed at the top end of the vertical movable frame (121); 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 comprises a first limiting assembly, and the first limiting assembly comprises a first limiting block (171) and a second limiting block (172) The first limit block (171) is fixedly connected to the first end of the bottom surface of the slide plate (132), and the second limit 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 limit block (171) is located directly above the second limit block (172), and when the first limit block (171) is connected to the second limit 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 crossbeam (25), two cantilevers (26), a pressing cylinder (27), a connecting plate (28) and a guide column (29); the two ends of the rotating crossbeam (25) are respectively rotatably connected to the top ends of the two pressing columns (21); 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); the connecting rod mechanism (24) is connected to the rotating crossbeam (25), and is used to drive the rotating crossbeam (25). 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. A 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 comprises 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 mounted 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 a three-step pressing machine for automobile door covers as claimed in 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 so that the pressing plate (22) moves to contact the inner panel part and applies a pressing force, and the insert assembly is in a pre-pressing preparation position; Step 2: The auxiliary pressing cylinder (27) drives the pressing piece downward to move 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: operate 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: operate 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 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 is stopped; Step 13: operate the vertical sliding group to move the insert assembly upward from the final pressing end position to the final pressing start position; drive 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