Intelligent flexible wire for welding

Abstract

The utility model discloses an intelligent flexible welding line which comprises a double-layer conveying platform (100) and two lifting devices (200), the double-layer conveying platform (100) is matched with each other to circularly convey a workpiece mounting base (300), the two lifting devices (200) are arranged at the two ends of the double-layer conveying platform (100), and the double-layer conveying platform (100) comprises a plurality of conveying units (400) which are connected end to end and are of the same structure. The conveying unit (400) comprises an upper-layer platform (41) and a lower-layer platform (42), the upper-layer platform (41) and the lower-layer platform (42) are each provided with a first transmission device (43) in the conveying direction so as to be used for conveying a workpiece mounting base (300), and a workpiece taking and placing station and a plurality of robot welding stations are sequentially distributed on an upper-layer conveying line in the conveying direction; a cache station is arranged or not arranged in the middle according to needs. According to the utility model, the length of the conveying platform can be flexibly adjusted according to production requirements, the workpiece mounting seat can be quickly taken or placed conveniently, and the tire film can be conveniently replaced.

Description

Technical Field

[0001] The utility model belongs to the field of automobile parts production, and in particular relates to a welding intelligent flexible wire. Background Art

[0002] With the advancement of technology, cars are used more and more widely in people's lives, and the functional requirements for cars are also increasing. As a result, various automobile OEMs launch a large number of new models every year, and each of them usually needs to install various required parts on the door panels of cars and buses through welding. At present, these welding tasks need to be completed by a large number of independent equipment. The more equipment there is, the larger the site area occupied, and the frequent replacement of processing stations will also affect the production accuracy.

[0003] At present, the existing flexible automated production lines in the domestic automobile manufacturing field mainly include modules such as body storage, interior assembly, chassis assembly, tire storage and transportation, seat storage and transportation, door assembly, powertrain assembly, vehicle assembly, off-line inspection, and robots that transfer between lines. However, in the face of the welding processing of automobile door panels, the industry has not yet developed flexible automated production line products.

[0004] In addition, in the welding process of automobile door panels, before welding the automobile door panels as workpieces, the workpieces usually need to be installed on the workpiece mounting seat first. After welding is completed, the workpiece needs to be removed from the workpiece mounting seat, and then a new workpiece needs to be installed. In the prior art, this process of taking and placing parts is all completed by manual operation, or by a combination of machine and manual operation. Specifically: first, the workpiece is manually installed on a device that can achieve lifting and pressing, and then the device is pressed down on the workpiece mounting seat to transfer the workpiece and install it on the workpiece mounting seat. After the processing is completed, the workpiece is lifted up by the device to complete the removal of the workpiece from the workpiece mounting seat, and then the processed workpiece is manually removed from the device. The method of completing it entirely by manual operation has a large workload, and the accuracy and tightness of the installation are not easy to guarantee, which is easy to cause unstable production quality or safety accidents. The existing machine combined with manual method can ensure the accuracy and tightness of the workpiece when it is installed on the workpiece mounting seat, but when installing the workpiece on the equipment that can achieve lifting and pressing, people need to bend down and drill under the equipment to install it, which is very inconvenient, time-consuming and labor-intensive. Therefore, people also hope to obtain a pick-and-place device that can ensure the installation accuracy and tightness of the workpiece and is easy to operate when picking and placing the workpiece. Utility Model Content

[0005] The purpose of the utility model is to provide a welding intelligent flexible line with fast production speed, high processing precision and flexible use. Compared with traditional processing equipment, it can greatly improve production efficiency, reduce direct labor costs and the amount of work-in-progress in the process, and at the same time improve equipment utilization to meet the mixed production requirements of different models of products.

[0006] The utility model is realized by the following technical solutions:

[0007] The welding intelligent flexible line comprises a double-layer conveying platform which cooperates with each other to cyclically convey a workpiece mounting seat and two lifting devices arranged at both ends of the double-layer conveying platform, wherein the double-layer conveying platform comprises a plurality of conveying units which are connected end to end and have the same structure, wherein the conveying unit comprises an upper platform and a lower platform, wherein the upper platform and the lower platform are both provided with a first transmission device in the conveying direction for conveying the workpiece mounting seat, wherein the upper platforms of the conveying units on the double-layer conveying platform cooperate to form an upper conveying line, and the lower platforms of the conveying units on the double-layer conveying platform cooperate to form a lower conveying line, wherein the upper conveying line and the conveying direction are sequentially provided with pick-up and place stations and A plurality of robot welding stations, a pick-and-place station and a robot welding station and adjacent robot welding stations are provided with or without a buffer station as required, wherein one station corresponds to one upper platform; a pick-and-place device is provided above the pick-and-place station, and a welding robot and a welding gun warehouse provided above or beside the robot welding station are provided; the lifting device comprises a fixed frame and a lifting tray provided on the fixed frame through a lifting mechanism, and a second transmission device for receiving and transporting a workpiece mounting seat is provided on the lifting tray, so as to realize the circulation of the workpiece mounting seat between the upper conveyor line and the lower conveyor line;

[0008] The pick-and-place device comprises a frame and a pick-and-place plate group which is arranged on the frame through a linear drive structure and can move up and down along the frame. The pick-and-place plate group comprises a fixed plate frame located on the upper side and a flip plate frame located on the lower side which can flip relative to the fixed plate frame. The fixed plate frame and the flip plate frame are connected on one side through a pin shaft, and the other side of the flip plate frame is connected to a movable end of a flip plate frame flipping driving device fixedly arranged on the frame, so that the flip plate frame can be flipped relative to the fixed plate frame by the driving of the flip plate frame flipping driving device, that is, the flipping is realized by rotating around the pin shaft; a plurality of workpiece suction cups are arranged on the flip plate frame;

[0009] The lifting device close to the pick-up and place-down station is the first lifting device, and the lifting device far from the pick-up and place-down station is the second lifting device. Next to the first lifting device, a tire mold changing work area is also provided in coordination;

[0010] The workpiece mounting seat comprises a tire mold base and a tire mold arranged on the tire mold base through a pneumatic quick-plug connector, and the workpiece is adsorbed on the tire mold through a pneumatic suction cup.

[0011] Preferably, the mold changing work area includes a mold changing device with a third transmission device that can cooperate with the first lifting device, and a mold changing trolley is also provided in cooperation with the mold changing device. When the mold needs to be replaced, the workpiece mounting seat that needs to be replaced is sent to the pick-up and placement station to complete the picking up, but the new workpiece is not re-placed, and then it is transferred from the upper conveyor line to the lower conveyor line in sequence, and then raised to the upper conveyor line by the first lifting device, and then the workpiece mounting seat is transferred to the mold changing trolley through the conveying device on the lifting device via the mold changing device, and then the unused workpiece mounting seat is replaced by the mold changing trolley, and then the required workpiece mounting seat is brought back, and then the workpiece mounting seat is sent to the first lifting device via the mold changing device to enter a new working cycle.

[0012] More preferably, a locking device and a positioning device are provided between the mold changing device and the mold changing trolley, so as to facilitate connection, positioning or disconnection of the mold changing device and the mold changing trolley when necessary.

[0013] Furthermore, the locking device includes two locking ports respectively located on the left and right sides of the mold changing device and two locking tongues located on the mold changing trolley and capable of cooperating with the locking ports. Each locking tongue is respectively arranged at one end of a rocker arm. Both rockers are driven to rotate through a synchronous shaft by a manually pulled control rod. An extension arm is also extended from the two rockers. The other ends of the extension arms are fixed to the mold changing trolley through a reset spring, so that the two rockers can be driven to rotate at the same time by manually pulling the control rod so that the two locking tongues are respectively hung in the two locking ports. The pulling force of the reset spring ensures that the locking tongues are always located in the locking ports.

[0014] Furthermore, the positioning device includes two groups of positioning components located on both sides of the mold changing device, each including two cylindrical tubes, one above and one below, and two groups of arc-shaped positioning components located on the mold changing trolley and capable of cooperating with the cylindrical tubes, each including two arc-shaped grooves, one above and one below. In the middle of the two arc-shaped grooves of each group of arc-shaped positioning components, there is also a positioning circular tube that can be connected to the cylindrical tube on the positioning component by a pin.

[0015] Preferably, the linear drive structure on the picking and placing device is a two-screw nut sleeve drive structure, which includes a screw and a nut sleeve that is sleeved on the screw and driven to rotate by a motor. The motor is fixedly arranged on the frame, and the two nut sleeves are driven to rotate simultaneously by the motor through a through shaft. The fixed plate frame in the picking and placing plate group is fixedly connected to the lower ends of the two screws, and a vertical guide rod is provided on the frame and passes through the four corners of the fixed plate frame. The motor drives the nut sleeve to rotate, so that the screw can move up and down relative to the frame, thereby moving the picking and placing plate group up and down. Because of the guiding effect of the guide rods passing through the four corners of the fixed plate frame, the stability of the movement of the picking and placing plate group can be guaranteed.

[0016] More preferably, a plurality of limit posts are provided on the frame and below the pick-and-place component plate assembly to prevent the pick-and-place component plate assembly from descending too much.

[0017] More preferably, the flip plate frame flipping drive device is an electric cylinder.

[0018] Preferably, the upper conveyor line is divided into a pick-up and place station, a buffer station one, a robot welding station one, a buffer station two, a robot welding station two, and a robot welding station three along the conveying direction, and the workpiece mounting seat passes through these stations in sequence.

[0019] Preferably, the lifting mechanism on the lifting device includes a guide rail, a screw and a screw driving motor. The guide rail is installed on the inner side of the fixed frame. The lifting tray is provided with a nut seat for the screw to pass through in the vertical direction and a slider cooperating with the guide rail. The screw driving motor drives the screw to rotate, and the lifting tray moves in the vertical direction with the cooperation of the screw and the nut seat.

[0020] Preferably, the welding robot comprises a supporting base and a welding manipulator which is arranged on the supporting base and can rotate 360°.

[0021] Preferably, the first, second and third transmission devices each include a conveying chain and a tire mold blocking cylinder cooperating with the conveying chain to facilitate accurate transmission and locking of the workpiece mounting seat.

[0022] The beneficial effects of the utility model are:

[0023] The welding intelligent flexible line of the utility model has an ingenious structure. By using a double-layer conveying platform, the length of the conveying platform can be flexibly adjusted according to production needs, such as flexibly adjusting the number of robot welding stations and the number of cache stations, which is suitable for the smooth transmission of workpieces and their tire molds and the on-demand processing of workpieces. The welding robot and the welding gun library matched therewith are arranged above or beside the conveying platform, which can save space. The use of the double-layer conveying platform can also reduce the space occupied by the equipment and improve the space utilization rate; by taking and placing the parts by the picking and placing device, it is possible to quickly take or place the parts on the workpiece mounting seat, and the flipping plate frame can be flipped relative to the fixed plate frame, which can be very convenient for personnel to remove the workpiece from the flipping plate frame or install the workpiece to be processed on the flipping plate frame; by setting the mold changing work area, it is very convenient to replace the tire mold according to the needs, improve the equipment utilization rate, and meet the mixed production requirements of products of different models; the utility model decomposes the entire automobile door panel welding production process into multiple stations to complete, and the stations are connected. It moves through the assembly line for transmission, and the overall production line process flow is: the workpiece mounting seat with the tire mold enters the pick-and-place station to place the workpiece to be processed - the robot welding station welds - the workpiece mounting seat flows back to the pick-and-place station to pick up and place new workpieces to be processed. If the tire mold needs to be replaced, the new workpiece will not be placed after picking up the workpiece. After the workpiece mounting seat circulates a circle and returns to the upper conveyor line, it flows to the mold changing work area through the first lifting device for mold changing. Among them, except for picking up and placing parts and replacing tire molds for the pick-and-place device, the actions of other stations are realized by automated control, and the three-dimensional whole of the automobile door panel welding production line is established. Moreover, the process of manually loading and removing parts from the pick-and-place device is very time-saving and labor-saving, and easy to operate. Therefore, compared with traditional processing equipment, the utility model as a whole can greatly improve production efficiency, reduce direct labor costs and the amount of work-in-progress in the process, and at the same time improve equipment utilization rate, meet the mixed production requirements of different models of products, have broad promotion and application prospects, strong practicality, and are worthy of promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be described by way of examples with reference to the accompanying drawings, in which:

[0025] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the utility model;

[0026] Figure 2 for Figure 1 Main view and transmission line diagram

[0027] Figure 3 It is a schematic diagram of the three-dimensional structure of the cache station;

[0028] Figure 4 for Figure 3 A side view structural schematic diagram of;

[0029] Figure 5for Figure 3 Schematic diagram of the main structure;

[0030] Figure 6 It is a three-dimensional structural schematic diagram of the lifting device;

[0031] Figure 7 for Figure 6 Schematic diagram of the main structure;

[0032] Figure 8 for Figure 6 A side view structural schematic diagram of;

[0033] Fig. 9 It is a schematic diagram of the three-dimensional structure of the pick-and-place station;

[0034] Fig.10 for Fig. 9 Enlarged view of point A in the middle;

[0035] Fig.11 for Fig. 9 A side view structural schematic diagram of;

[0036] Fig.12 This is a schematic diagram of the three-dimensional structure of the robot welding station;

[0037] Fig.13 for Fig.12 Schematic diagram of the main structure;

[0038] Fig.14 It is a schematic diagram of the three-dimensional structure of the mold changing device;

[0039] Fig.15 for Fig.14 A side view structural schematic diagram of;

[0040] Fig.16 It is a three-dimensional structural diagram of the mold changing trolley;

[0041] Fig.17 for Fig.16 Enlarged view of point A in the middle;

[0042] Fig.18 for Fig.16 Schematic diagram of the side structure. DETAILED DESCRIPTION

[0043] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0044] Any feature disclosed in this specification (including any additional claims, abstract and drawings), unless otherwise stated, may be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0045] like Figure 1-18 As shown, the welding intelligent flexible line includes a double-layer conveying platform 100 that cooperates with each other to cyclically convey the workpiece mounting seat 300 and two lifting devices 200 arranged at both ends of the double-layer conveying platform 100, the double-layer conveying platform 100 includes a plurality of conveying units 400 connected end to end and having the same structure, the conveying unit 400 includes an upper platform 41 and a lower platform 42, the upper platform 41 and the lower platform 42 are both provided with a first transmission device 43 in the conveying direction for conveying the workpiece mounting seat 300, the upper platforms 41 of each conveying unit 400 on the double-layer conveying platform 100 cooperate to form an upper conveying line, the lower platforms 42 of each conveying unit 400 on the double-layer conveying platform 100 cooperate to form a lower conveying line, the upper conveying line and the lower conveying line along the conveying direction , there are pick-up and place stations and several robot welding stations distributed in sequence, and cache stations may or may not be provided between the pick-up and place stations and the robot welding stations and between adjacent robot welding stations as needed, wherein one station corresponds to an upper platform 41; above the pick-up and place stations, a pick-up and place device 500 is provided in coordination, and above or beside the robot welding stations, a welding robot 600 and a welding gun library 601 coordinated therewith are provided in coordination; the lifting device 200 includes a fixed frame 21 and a lifting tray 23 arranged on the fixed frame 21 through a lifting mechanism, and a second transmission device 24 for receiving and transporting a workpiece mounting seat 300 is provided on the lifting tray 23, so as to realize the circulation of the workpiece mounting seat 300 between the upper conveyor line and the lower conveyor line;

[0046] The pick-and-place device 500 includes a frame 51 and a pick-and-place plate group 52 which is arranged on the frame 51 through a linear drive structure and can move up and down along the frame 51. The pick-and-place plate group 52 includes a fixed plate frame 53 located on the upper side and a flip plate frame 54 located on the lower side which can flip relative to the fixed plate frame 53. The fixed plate frame 53 and the flip plate frame 54 are connected on one side through a pin shaft, and the other side of the flip plate frame 54 is connected to a movable end of a flip plate frame flip driving device 55 fixedly arranged on the frame 51, so that the flip plate frame 54 can be flipped relative to the fixed plate frame 53 by the drive of the flip plate frame flip driving device 55, that is, the flipping is realized by rotating around the pin shaft; a plurality of workpiece suction cups are arranged on the flip plate frame 54;

[0047] The lifting device 200 close to the pick-up and place workstation is the first lifting device 201, and the lifting device 200 far from the pick-up and place workstation is the second lifting device 202. Next to the first lifting device 201, a tire mold changing work area 700 is also provided.

[0048] The workpiece mounting seat 300 includes a mold base 31 and a mold 32 disposed on the mold base 31 via a pneumatic quick-connect connector, and a workpiece 33 is adsorbed on the mold 32 via a pneumatic suction cup.

[0049] The tire mold changing work area 700 includes a mold changing device 71 with a third transmission device that can cooperate with the first lifting device 201, and a mold changing trolley 72 is also provided in cooperation with the mold changing device 71. When the tire mold 32 needs to be replaced, the workpiece mounting seat 300 that needs to be replaced is sent to the pick-up and placement station to complete the picking up of the workpiece, but the new workpiece is not re-placed, and then it is transferred from the upper conveyor line to the lower conveyor line in sequence, and then raised to the upper conveyor line through the first lifting device 201, and then the workpiece mounting seat is transferred to the mold changing trolley 72 through the conveying device on the lifting device via the mold changing device 71, and then the unused workpiece mounting seat 300 is replaced by the mold changing trolley 72, and then the required workpiece mounting seat 300 is brought back, and then the workpiece mounting seat is sent to the first lifting device 201 through the mold changing device to enter a new working cycle.

[0050] A locking device and a positioning device are also provided between the mold changing device 71 and the mold changing trolley 72, so as to connect, position or disconnect the mold changing device 71 and the mold changing trolley 72 when necessary.

[0051] The locking device includes two locking ports 73 respectively located on the left and right sides of the mold changing device 71 and two locking tongues 74 located on the mold changing trolley 72 and capable of cooperating with the locking ports 73. Each locking tongue 74 is respectively arranged at one end of a rocker arm. The two rockers are driven to rotate through a synchronous shaft by a manually pulled control rod 75. An extension arm is also extended from the two rockers. The other ends of the extension arms are fixed to the mold changing trolley 72 through a reset spring 79, so that the two rockers can be driven to rotate at the same time by manually pulling the control rod 75 so that the two locking tongues 74 are respectively hung in the two locking ports 73. The pulling force of the reset spring 79 ensures that the locking tongue 74 is always located in the locking port 73.

[0052] The positioning device includes two groups of positioning components located on both sides of the mold changing device 71, each including two cylindrical tubes 76, one above and one below, and two groups of arc-shaped positioning components located on the mold changing trolley 72, each including two arc-shaped grooves 77, one above and one below, which can cooperate with the cylindrical tube 76. In the middle of the two arc-shaped grooves 77 of each group of arc-shaped positioning components, there is also a positioning circular tube 78 that can be matched and connected with the cylindrical tube 76 on the positioning component through a pin 80.

[0053] The linear driving structure on the pick-and-place device 500 is a two-screw nut sleeve driving structure, which includes a screw 56 and a nut sleeve 57 sleeved on the screw 56 and driven to rotate by a motor. The motor is fixedly arranged on the frame 51, and the two nut sleeves 57 are driven to rotate simultaneously by the motor through the through shaft. The fixed plate frame 53 in the pick-and-place plate group 52 is fixedly connected to the lower ends of the two screws 56, and a vertical guide rod 58 is also provided on the frame 51 and through the four corners of the fixed plate frame 53. The motor drives the nut sleeve 57 to rotate, so that the screw 56 can move up and down relative to the frame 51, thereby driving the pick-and-place plate group 52 to move up and down. Because of the guiding effect of the guide rods 58 passing through the four corners of the fixed plate frame 53, the stability of the movement of the pick-and-place plate group 52 can be guaranteed.

[0054] A plurality of limit posts 59 are further provided on the frame 51 and below the pick-and-place component plate set 52 to prevent the pick-and-place component plate set 52 from descending too much.

[0055] The turning plate frame turning drive device 55 is an electric cylinder.

[0056] In the embodiment of the utility model, the upper conveyor line is divided into a pick-up and place station A, a cache station C1, a robot welding station B1, a cache station C2, a robot welding station B2, and a robot welding station B3 along the conveying direction, and the workpiece mounting seat 300 passes through these stations in sequence.

[0057] The lifting mechanism on the lifting device 200 includes a guide rail 25, a screw 22 and a screw drive motor. The guide rail 25 is installed on the inner side of the fixed frame 21. The lifting tray 23 is provided with a nut seat for the screw 22 to pass through in the vertical direction and a slider that cooperates with the guide rail. The screw drive motor drives the screw 22 to rotate, and the lifting tray 23 moves in the vertical direction with the cooperation of the screw 22 and the nut seat.

[0058] The lifting tray 23 is provided with a plurality of positioning blocks, each of which is driven by a cylinder, and the workpiece mounting seat 300 is provided with a slot adapted to the positioning block.

[0059] The welding robot 600 includes a supporting base and a welding manipulator which is arranged on the supporting base and can rotate 360 ​​degrees.

[0060] The first, second, and third transmission devices all include a conveying chain 81 and a tire mold blocking cylinder 82 that cooperates with the conveying chain 81 to facilitate accurate transmission and locking of the workpiece mounting seat 300.

[0061] The double-layer conveying platform 100, the lifting device 200, the pick-and-place device 500 and the welding robot 600 are provided with electrical circuits for ensuring that the workpieces are always adsorbed and fixed during transportation and processing. The setting of the electrical circuits is in accordance with the commonly used setting method in the prior art.

[0062] The production method of the above-mentioned welding intelligent flexible wire comprises the following steps in sequence:

[0063] (1) The workpiece mounting seat with the tire mold is driven by the upper conveyor line to enter the pick-and-place station, where the workpiece to be processed is placed by the pick-and-place device. Specifically, the pick-and-place plate group with the workpiece to be processed is pressed down to place the workpiece on the workpiece mounting seat; before that, the flip plate frame on the pick-and-place plate group is driven to flip relative to the fixed plate frame to an angle that is convenient for the operator to install the workpiece to be processed on the flip plate frame, and then the workpiece to be processed is manually installed on the flip plate frame, and the flip plate frame sucks the workpiece through its workpiece suction cup, and then the flip plate frame on the pick-and-place plate group is driven to return to a position parallel to the fixed plate frame, so as to prepare for placing the workpiece on the workpiece mounting seat;

[0064] (2) The workpiece mounting base on which the workpiece to be processed is placed is transported to the robot welding station in sequence, and the workpiece is welded as required by the welding robot at the robot welding station;

[0065] (3) The workpiece mounting seat with the welded workpiece is forwarded to the lower conveyor line through the second lifting device for transportation, and then is transferred back to the upper conveyor line through the first lifting device, and then is transferred back to the pick-up and placement station through the upper conveyor line. At this station, the workpiece mounting seat is taken out and a new workpiece to be processed is placed on it by the pick-up and placement device, and then the previous processing action is repeated; if the mold needs to be replaced, the workpiece mounting seat is transferred back to the upper conveyor line by the first lifting device, and the workpiece mounting seat is taken out by the pick-up and placement device at the pick-up and placement station. No new workpiece is placed, but it is directly transferred again until the workpiece mounting seat is lifted to the upper conveyor line by the first lifting device, and then the workpiece mounting seat is transferred to the mold changing work area by the first lifting device for mold changing;

[0066] When it is necessary to pick up a workpiece from the workpiece mounting seat, the pick-up and placement plate group is pressed down to pick up the workpiece from the workpiece mounting seat. Specifically, the workpiece is picked up by the workpiece suction cup on the flip plate frame. After the pick-up and placement device picks up the workpiece mounting seat, the pick-up and placement plate group is driven to return to its original position, and then the flip plate frame on the pick-up and placement plate group is driven to flip relative to the fixed plate frame to an angle that is convenient for the operator to remove the processed workpiece, and then the processed workpiece is manually removed from the flip plate frame, and then a new workpiece to be processed is installed, and then the flip plate frame on the pick-up and placement plate group is driven to return to a position parallel to the fixed plate frame, so as to prepare for placing the new workpiece to be processed on the workpiece mounting seat.

[0067] The welding intelligent flexible line of the utility model has an ingenious structure. By using a double-layer conveying platform, the length of the conveying platform can be flexibly adjusted according to production needs, such as flexibly adjusting the number of robot welding stations and the number of cache stations, which is suitable for the smooth transmission of workpieces and their tire molds and the on-demand processing of workpieces. A welding robot and a welding gun library matched therewith are arranged above or beside the conveying platform, which can save space. The use of a double-layer conveying platform can also reduce the space occupied by the equipment and improve the space utilization rate. By taking and placing parts by a picking and placing device, it is possible to quickly take or place parts on the workpiece mounting seat, and the flipping plate frame can be flipped relative to the fixed plate frame, which can be very convenient for personnel to remove the workpiece from the flipping plate frame or install the workpiece to be processed on the flipping plate frame. By setting up a mold changing work area, it is very convenient to replace the tire mold according to needs, improve equipment utilization, and meet the mixed production requirements of different models of products. The utility model decomposes the entire automobile door panel welding production process into multiple stations to complete, and the movement between the stations is transmitted by an assembly line. The overall production line process is: the workpiece with the tire mold The mounting seat enters the pick-and-place station to place the workpiece to be processed - the robot welding station welds - the workpiece mounting seat flows back to the pick-and-place station to pick up and place new workpieces to be processed. If the tire mold needs to be replaced, the new workpiece will not be placed after picking up the workpiece. After the workpiece mounting seat circulates a circle and returns to the upper conveyor line, it flows to the mold changing work area through the first lifting device to change the mold. Among them, except for picking up and placing parts and replacing tire molds for the pick-and-place device, the actions of each other station are realized by automatic control, and the three-dimensional whole of the automobile door panel welding production line is established. Moreover, the process of manually loading and removing parts from the pick-and-place device is very time-saving and labor-saving, and easy to operate. Therefore, compared with traditional processing equipment, the utility model as a whole can greatly improve production efficiency, reduce direct labor costs and the amount of work-in-progress in the process, and at the same time improve equipment utilization to meet the mixed production requirements of different models of products; with the rapid growth of domestic demand for industrial robots, it can be foreseen that the successful development and industrialization of the project products will surely achieve significant economic, social and environmental benefits, have broad prospects for promotion and application, are highly practical, and are worthy of promotion.

[0068] The present invention is not limited to the above-mentioned specific implementation modes, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims

1. Welding intelligent flexible wire, characterized in that, The invention comprises a double-layer conveying platform (100) which cooperates with each other to cyclically convey a workpiece mounting seat (300) and two lifting devices (200) arranged at both ends of the double-layer conveying platform (100), wherein the double-layer conveying platform (100) comprises a plurality of conveying units (400) which are connected end to end and have the same structure, wherein the conveying units (400) comprise an upper platform (41) and a lower platform (42), wherein the upper platform (41) and the lower platform (42) are both provided with a first transmission device (43) in the conveying direction for conveying the workpiece mounting seat (300), wherein the upper platforms (41) of the conveying units (400) on the double-layer conveying platform (100) cooperate with each other to form an upper conveying line, and the lower platforms (42) of the conveying units (400) on the double-layer conveying platform (100) cooperate with each other to form a lower conveying line, wherein the upper conveying line and the lower conveying line along the conveying direction are provided with a first transmission device (43) for conveying the workpiece mounting seat (300). In the direction, there are pick-up and place stations and a plurality of robot welding stations, and buffer stations are provided or not provided between the pick-up and place stations and the robot welding stations and between adjacent robot welding stations as required, wherein one station corresponds to one upper platform (41); a pick-up and place device (500) is provided above the pick-up and place stations, and a welding robot (600) and a welding gun magazine (601) coordinated therewith are provided above or beside the robot welding stations; the lifting device (200) comprises a fixed frame (21) and a lifting tray (23) arranged on the fixed frame (21) by a lifting mechanism, and a second transmission device (24) for receiving and transporting a workpiece mounting seat (300) is provided on the lifting tray (23), so as to realize the circulation of the workpiece mounting seat (300) between the upper conveyor line and the lower conveyor line; The pick-and-place device (500) comprises a frame (51) and a pick-and-place plate group (52) which is arranged on the frame (51) via a linear drive structure and can move up and down along the frame (51); the pick-and-place plate group (52) comprises a fixed plate frame (53) located on the upper side and a flip plate frame (54) located on the lower side and can flip relative to the fixed plate frame (53); the fixed plate frame (53) and the flip plate frame (54) are connected on one side via a pin shaft, and the other side of the flip plate frame (54) is connected to a movable end of a flip plate frame flipping drive device (55) fixedly arranged on the frame (51); a plurality of workpiece suction cups are arranged on the flip plate frame (54); The lifting device (200) close to the pick-up and place-down station is a first lifting device (201), and the lifting device (200) far from the pick-up and place-down station is a second lifting device (202). A tire mold changing work area (700) is also provided next to the first lifting device (201); The workpiece mounting seat (300) comprises a tire mold base (31) and a tire mold (32) arranged on the tire mold base (31) via a pneumatic quick-connect connector, and the workpiece (33) is sucked onto the tire mold (32) via a pneumatic suction cup.

2. The welding intelligent flexible wire according to claim 1, characterized in that: The tire mold changing work area (700) comprises a mold changing device (71) with a third transmission device capable of cooperating with the first lifting device (201), and a mold changing trolley is also provided in cooperation with the mold changing device (71).

3. The welding intelligent flexible wire according to claim 2 is characterized in that: A locking device and a positioning device are also provided between the mold changing device (71) and the mold changing trolley (72), so as to facilitate connection, positioning or disconnection of the mold changing device (71) and the mold changing trolley (72) when necessary.

4. The welding intelligent flexible wire according to claim 3 is characterized in that: The locking device comprises two locking ports (73) respectively located on the left and right sides of the mold changing device (71) and two locking tongues (74) located on the mold changing trolley (72) and capable of cooperating with the locking ports (73). Each locking tongue (74) is respectively arranged at one end of a rocker arm. The two rockers are driven to rotate via a synchronous shaft by a manually pulled control rod (75). An extension arm is also extended from the two rockers. The other ends of the extension arms are fixed to the mold changing trolley (72) via a return spring (79), so that the two rockers are driven to rotate simultaneously by manually pulling the control rod (75) so that the two locking tongues (74) are respectively hung in the two locking ports (73). The pulling force of the return spring (79) keeps the locking tongue (74) in the locking port (73) all the time.

5. The welding intelligent flexible wire according to claim 3 is characterized in that: The positioning device comprises two groups of positioning components including two cylindrical tubes (76) one above and one below located on both sides of the mold changing device (71) and two groups of arc-shaped positioning components including two arc-shaped grooves (77) one above and one below located on the mold changing trolley (72) and capable of cooperating with the cylindrical tubes (76). In the middle of the two arc-shaped grooves (77) of each group of arc-shaped positioning components, there is also a positioning circular tube (78) that can be connected to the cylindrical tube (76) on the positioning component by means of a latch (80).

6. The welding intelligent flexible wire according to claim 1, characterized in that: The linear drive structure on the pick-and-place device (500) is a two-screw nut sleeve drive structure, the screw nut sleeve drive structure comprises a screw (56) and a nut sleeve (57) sleeved on the screw (56) and driven to rotate by a motor, the motor is fixedly arranged on the frame (51), and the two nut sleeves (57) are driven to rotate simultaneously by the motor through a through shaft, the fixed plate frame (53) in the pick-and-place plate group (52) is fixedly connected to the lower ends of the two screws (56), and a vertical guide rod (58) is also provided on the frame (51) and at four corners passing through the fixed plate frame (53).

7. The welding intelligent flexible wire according to claim 1, characterized in that: The lifting mechanism on the lifting device (200) comprises a guide rail (25), a lead screw (22) and a lead screw drive motor; the guide rail (25) is mounted on the inner side of the fixing frame (21); and the lifting tray (23) is provided with a nut seat for the lead screw (22) to pass through in the vertical direction and a sliding block cooperating with the guide rail.

8. The welding intelligent flexible wire according to claim 1, characterized in that: The first, second, and third transmission devices all include a conveying chain (81) and a tire mold blocking cylinder (82) that cooperates with the conveying chain (81) to facilitate accurate transmission and locking of the workpiece mounting seat (300).

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