CN214558407U - Passenger car side wall framework welding assembly line - Google Patents

Abstract

The utility model discloses a passenger train side wall skeleton welds dress assembly line. The utility model provides a passenger train side wall skeleton welds dress assembly line, including the first side that sets gradually enclose openly welding station, second side and enclose openly welding station, third side and enclose openly welding station, openly repair welding and reverse side welding station, reverse side repair welding and the reverse side station of polishing, openly polish station, sequencing storage device and transport the station. The utility model discloses a passenger train side wall skeleton welds dress assembly line maneuverability is strong, and the technology is more succinct to be practiced thrift, and the outward appearance is compacter pleasing to the eye, and the security is high, and the operation is convenient, and the energy consumption is low, and the fault rate is low, and the maintenance of being convenient for is changed.

Description

Passenger car side wall framework welding assembly line

Technical Field

The invention relates to the technical field of passenger car manufacturing, in particular to a passenger car side wall framework welding assembly line.

Background

The passenger car is a commercial car which is used for carrying passengers and carry-on luggage of the passengers, wherein the passenger car is a square carriage and is mainly used for public transportation and group transportation, the passenger car can be divided into a single car and a train according to the overall structure, the single car is a basic car type, and the single car is usually divided into a large car, a medium car and a small car according to the total weight of the passenger car or the number of seats. The side wall framework of the passenger car is used as the main part of the whole framework of the passenger car, and the welding quality of the side wall framework directly influences the assembly precision of the whole car.

The existing passenger car side wall framework welding assembly line has defects in the aspects of worker operability for the welding of the following two types of products: product 1: the system comprises a medium-sized rear hoisting road, a school bus, a 6-8 m front hoisting road, a front hoisting bus and a large-sized rear hoisting road. Product 2: the system comprises large and medium-sized pure electric buses, plug-in buses, traditional fuel full-load buses, light pure electric buses and fuel cell buses. The structure of the existing production line does not consider the convenience of an operator, so that the structural design has unreasonable parts, and the operations of welding, polishing and the like of the operator are inconvenient. Therefore, it is necessary to provide a welding assembly line for a side wall frame of a passenger car to solve the above problems.

Disclosure of Invention

The invention aims to overcome the defects and provides a passenger car side wall framework welding assembly line to solve the problem that the existing passenger car side wall framework welding assembly line is often insufficient in the aspect of operability of workers.

The invention provides a welding assembly line for a side wall framework of a passenger car, which comprises a first side wall front welding station, a second side wall front welding station, a third side wall front welding station, a front repair welding and reverse welding station, a reverse repair welding and reverse polishing station, a front polishing station, a sequencing storage device and a transfer station which are sequentially arranged;

the front repair welding station and the back welding station comprise three sections of first narrow plate chain conveyors which are sequentially arranged at intervals, a lifting machine is arranged below the middle section of the first narrow plate chain conveyor in the three sections of first narrow plate chain conveyors, a turnover mechanism is arranged between the three sections of first narrow plate chain conveyors, and two sets of first steel structure and double-track traveling hoist systems which are arranged in parallel are arranged above the front repair welding station and the back welding station; the reverse side repair welding and reverse side polishing station is provided with a section of second narrow plate chain conveyor, and two ends of the second narrow plate chain conveyor are provided with workpiece clamping and positioning devices; two sets of second steel structure and double-track traveling hoist systems which are arranged in parallel are arranged above the front polishing station; the sorting storage device is provided with a storage frame, a plurality of side wall frameworks are arranged on the storage frame side by side, and two sets of third steel structures and double-track traveling hoist systems which are arranged in parallel are arranged above the sorting storage device; and two sets of fourth steel structures and double-track traveling hoist systems which are arranged in parallel are arranged above the transfer station.

Further, a welding fixture placing vehicle is arranged in the second side wall front welding station or the third side wall front welding station, the welding fixture placing vehicle is provided with a lithium battery, a direct current motor, a transmission assembly and wheels, the lithium battery is electrically connected with the direct current motor, and the direct current motor is in transmission connection with the wheels through the transmission assembly.

Further, first steel constructs and double track walking calabash system includes that relative first steel that sets up constructs, transversely movably sets up the running gear on first steel constructs and vertically movably sets up in the first endless chain calabash of running gear below.

Further, the second steel constructs and double track walking hoist system includes that the second steel constructs, two parallel arrangement's first vertical rail, two parallel arrangement's first horizontal rail and movably sets up in two second endless chain hoists of two first horizontal rail belows respectively, first vertical rail and second steel construct perpendicular connection, first horizontal rail with first vertical rail is perpendicular and sliding connection. The third steel constructs and double track walking hoist system includes that the third steel constructs, two parallel arrangement's second indulges the rail and two parallel arrangement's horizontal rail of second, the second is indulged the rail and is constructed perpendicular connection with the third steel, the second horizontal rail with the second is indulged the rail perpendicular connection. The fourth steel structure and double-track walking hoist system comprises a fourth steel structure, two third longitudinal rails arranged in parallel, a third transverse rail and two third chain hoists movably arranged below the third transverse rail, wherein the third longitudinal rail is vertically connected with the fourth steel structure, and the third transverse rail is vertically and slidably connected with the third longitudinal rail; the second steel structure, the third steel structure and the fourth steel structure are connected into a whole.

Further, the machine of lifting including the machine of lifting chassis, parallel arrangement in the platform that lifts above the machine of lifting chassis, and connect in the machine of lifting chassis with lift folding elevating system between the platform.

Furthermore, the turnover mechanism comprises a turnover arm, a turnover motor and a turnover shaft, wherein a gear is arranged on the turnover shaft, the turnover motor is in transmission connection with the gear through a turnover shaft transmission mechanism, and the two ends of the turnover shaft are vertically connected with the turnover arm; the turnover mechanism is characterized in that a walking motor is arranged below the turnover motor, the walking motor is connected with a walking transmission shaft, gear belts are arranged at two ends of the walking transmission shaft, a conveying belt is meshed outside the gear belts, the conveying belt is arranged inside the frame body, a turnover seat is movably arranged on the frame body, the turnover shaft is rotatably connected to the turnover seat, the bottom of the turnover seat is connected with the conveying belt, and the turnover motor is provided with a cycloidal speed reducer and a worm and gear speed reducer.

Furthermore, waist rail anti-deformation tools are respectively arranged in areas, corresponding to two ends of the turnover mechanism, on the first steel structure, and two positioning rods are arranged on each waist rail anti-deformation tool.

Furthermore, the upper surfaces of two sections of first narrow plate chain conveyors positioned at two ends of the three sections of first narrow plate chain conveyors are 450mm higher than the upper surface of the frame body of the turnover mechanism, the lengths of the three sections of first narrow plate chain conveyors are 3.8m, 4.5m and 3.8m respectively, the total length of the three sections of first narrow plate chain conveyors is 12.5m, and the upper surface of the second narrow plate chain conveyor is 450mm higher than the ground and 12.5 m.

Further, the first narrow plate chain conveyor and the second narrow plate chain conveyor are both provided with plate chains and rollers, the pitch of the plate chains is 80mm, and the diameter of the rollers is 60 mm.

The invention has the following beneficial effects: the welding assembly line for the side wall framework of the passenger car comprises a first side wall front welding station, a second side wall front welding station, a third side wall front welding station, a front repair welding and reverse welding station, a reverse repair welding and reverse polishing station, a front polishing station, a sequencing storage device and a transfer station which are sequentially arranged, and has the advantages of strong operability, simpler and more economical process, more compact and more attractive appearance, high safety, convenience in operation, low energy consumption, low failure rate and convenience in maintenance and replacement.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is an overall schematic view of a welding assembly line for a side wall frame of a passenger car provided by the invention;

FIG. 2 is a partial perspective view of a welding assembly line for a side wall frame of a passenger car according to the present invention;

FIG. 3 is a front repair welding and back welding station structure diagram of the passenger car side wall frame welding assembly line provided by the invention;

FIG. 4 is a front repair welding and reverse welding station and a reverse repair welding and reverse polishing station structure diagram of the passenger car side wall frame welding assembly line provided by the invention;

FIG. 5 is a front side grinding station, a sequencing storage device and a transfer station structure diagram of the welding assembly line of the side wall frame of the passenger car provided by the invention;

FIG. 6 is a structural view of a welding fixture placing vehicle of the welding assembly line of the side wall framework of the passenger car provided by the invention;

FIG. 7 is a first steel structure and double-track walking hoist system structure diagram of the passenger car side wall framework welding assembly line provided by the invention;

FIG. 8 is a structural diagram of a second steel structure, a third steel structure, a fourth steel structure and a double-track walking hoist system of the welding assembly line of the side wall framework of the passenger car provided by the invention;

FIG. 9 is a structural view of a lifting machine of a welding assembly line of a side wall framework of a passenger car provided by the invention;

FIG. 10 is a structural view of a turnover mechanism of a welding assembly line of a side wall framework of a passenger car provided by the invention;

FIG. 11 is a partial structure view of a turning motor of the welding assembly line for the side wall frame of the passenger car provided by the invention;

FIG. 12 is a partial structure view of a walking motor of the welding assembly line for the side wall frame of the passenger car provided by the invention;

FIG. 13 is a schematic diagram showing the turnover mechanism of the welding assembly line for the side wall frame of the passenger car according to the present invention;

FIG. 14 is a schematic view of a second narrow plate chain conveyor of the welding assembly line for the side wall frame of the passenger car provided by the invention;

FIG. 15 is a schematic view of a laser detection system of a passenger car side wall frame welding assembly line provided by the invention;

FIG. 16 is a working state diagram of a turnover mechanism of the welding assembly line of the side wall frame of the passenger car provided by the invention;

FIG. 17 is a front view of a turnover mechanism of a welding assembly line for a side wall frame of a passenger car provided by the invention;

FIG. 18 is a working state diagram of a back repair welding and back polishing station of the passenger car side wall frame welding assembly line provided by the invention;

FIG. 19 is an enlarged partial view of area A of FIG. 18;

FIG. 20 is an enlarged partial view of area B of FIG. 18;

FIG. 21 is a working state diagram of another angle of the reverse side repair welding and reverse side polishing station of the passenger car side wall frame welding assembly line provided by the invention;

FIG. 22 is a working state diagram of a back repair welding and back grinding station of the passenger car side wall frame welding assembly line at another angle;

FIG. 23 is a front view of a sorting and storing device of a welding assembly line for a side wall frame of a passenger car according to the present invention;

FIG. 24 is a perspective view of a sorting and storing device of a welding assembly line for a side wall frame of a passenger car according to the present invention;

FIG. 25 is a schematic view of a waist rail anti-deformation tool of the passenger car side wall framework welding assembly line provided by the invention.

Illustration of the drawings: 1-a first side wall front welding station; 2-welding a second side wall front side; 3-a third side-wall front welding station; 4-front repair welding and back welding stations; 5-back surface repair welding and back surface polishing station; 6-front side polishing station; 7-sequencing storage means; 8-a transfer station; 44-a first narrow plate chain conveyor; 42-a lifter; 43-a turnover mechanism; 41-a first steel structure and double-track walking hoist system; 50-a second narrow plate chain conveyor; 51-workpiece clamping and positioning means; 52-laser detection system; 61-a second steel structure and double-track walking hoist system; 72-a storage rack; 73-side wall frame; 71-a third steel structure and double-track walking hoist system; 81-fourth steel structure and double-track walking hoist system; 21-placing a welding fixture; 22-a lithium battery; 23-a direct current motor; 24-a transmission assembly; 25-a wheel; 411-first steel structure; 412-a running gear; 413-first endless chain hoist; 611-a second steel structure; 612-a first longitudinal rail; 613-first transverse rail; 614-second ring chain hoist; 711-third steel structure; 712-a second longitudinal rail; 713-second cross rail; 811-fourth steel structure; 812-a third longitudinal rail; 813-third cross rail; 814-third chain hoist; 421-lifter chassis; 423-lifting the platform; 422-a folding lifting mechanism; 431-a flipping arm; 432-a flipping motor; 433-a turning shaft; 436-gear wheel; 435-overturning shaft transmission mechanism; 434-a walking motor; 437-a walking transmission shaft; 438-toothed belt wheel; 439-a conveyor belt; 440-a roll-over stand; 414-waist rail reversible deformation tooling; 415-positioning a rod; 100-passenger car side wall frame.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art, in the drawings, the thicknesses of layers and regions are exaggerated for clarity, and the same devices are denoted by the same reference numerals, and thus the description thereof will be omitted.

The invention relates to a passenger car side wall framework welding production line, which firstly carries out front welding (namely convex surface) of a passenger car side wall framework on a tool clamp which is already made in the first square, welds all small pipe groups into a complete side wall framework, has three stations for storing the tool clamp, one of which is a standby station, and the other two of which are used in normal production. During production, the corresponding clamp needs to be prepared one day in advance. After the front side welding of the side wall framework on the tool fixture is finished, the workpiece is hoisted to the next station in parallel by using a double-rail hoist system to carry out the back side welding, the station is provided with an in-situ 180-degree turnover mechanism, the workpiece is turned over by 90 degrees firstly, a worker is allowed to stand to weld the middle part and the lower part of the back side (provided with a waist beam anti-deformation tool), and finally the workpiece is turned over to 180 degrees to weld the upper part of the back side. And then, conveying the workpiece to the next station by using a single-plate chain conveying system, and performing back surface repair welding and back surface polishing, wherein the station is provided with a waist beam straightness laser detection system and is positioned below the workpiece. After the detection is finished, the workpiece is conveyed to a front polishing station through a plate chain, the station is also provided with a 180-degree turnover mechanism, the workpiece is directly turned over by 180 degrees and faces upwards to be polished, and after the polishing work is finished, the workpiece needs to be conveyed away in a centralized mode, so that a storage rack is arranged at the next station, and 6 side wall frameworks can be stored simultaneously. The process adopts a double-track hoist for hoisting. And after the workpieces on the storage rack are fully loaded, the workpieces are also hoisted to the transfer trolley by the hoist system and are transported away.

Referring to fig. 1 to 25, the above processes can be implemented by a passenger car side wall framework welding assembly line provided by an embodiment of the present invention, and the passenger car side wall framework welding assembly line includes a first side wall front welding station 1, a second side wall front welding station 2, a third side wall front welding station 3, a front repair welding and back welding station 4, a back repair welding and back polishing station 5, a front polishing station 6, a sorting storage device 7, and a transfer station 8, which are sequentially arranged.

Specifically, the first side wall front welding station 1 is provided with a standby fixture, and the second side wall front welding station 2 and the third side wall front welding station 3 are respectively provided with a welding fixture. And transporting all the fixtures required by the next shift to a workshop after the next shift every day, placing 2 sets of fixtures to be used firstly on the second side-wall front welding station 2 and the third side-wall front welding station 3 by using a travelling crane according to the order production sequence of the next shift, and transporting and storing the fixtures required by the assembly line every day by a first party. The traveling crane switched and used by the clamp is responsible for the first party (3 tons or 5 tons of traveling cranes exist in the existing workshop). Meanwhile, a welding fixture placing vehicle can be arranged, and after the fixture is placed on the welding fixture placing vehicle, the fixture can move between the second side wall front welding station 2 and the third side wall front welding station 3 through the welding fixture placing vehicle. For example, the existing welding fixture placing vehicle is placed at the second side wall front welding station 2, after the fixture is placed on the welding fixture placing vehicle, the welding fixture placing vehicle is controlled to move the fixture to the third side wall front welding station 3, the welding fixture placing vehicle can move back to the second side wall front welding station 2, and the second side wall front welding station 2 and the third side wall front welding station 3 achieve front welding of the left side wall framework and the right side wall framework.

In this embodiment, a welding fixture placing vehicle 21 is arranged in the second side wall front welding station 2 or the third side wall front welding station 3, the welding fixture placing vehicle 21 is provided with a lithium battery 22, a direct current motor 23, a transmission assembly 24 and a wheel 25, the lithium battery 22 is electrically connected with the direct current motor 23, the direct current motor 23 is in transmission connection with the wheel 25 through the transmission assembly 24, the direct current motor 23 is powered through the lithium battery 22, and the welding fixture placing vehicle 21 is driven to move through the direct current motor 23. The size of the welding clamp placing vehicle 21 is 6000mm x 2000mm x 280mm, the load is 6T, the electric welding clamp placing vehicle is controlled to travel by remote control, and the welding clamp placing vehicle has the advantages of being stable in operation, convenient to operate, long in service life and the like. Guard plates can be arranged on the outer sides of the lithium battery 22 and the direct current motor 23.

The front repair welding station and the back welding station 4 comprise three sections of first narrow plate chain conveyors 44 which are sequentially arranged at intervals, a lifting machine 42 is arranged below a section of the first narrow plate chain conveyor 44 which is positioned in the middle of the three sections of the first narrow plate chain conveyors 44, a turnover mechanism 43 is arranged between the three sections of the first narrow plate chain conveyors 44, two sets of first steel structure and double-rail walking hoist systems 41 which are arranged in parallel are arranged above the first side wall front welding station 1, the second side wall front welding station 2, the third side wall front welding station 3 and the front repair welding station and the back welding station 4, and the left side wall framework and the right side wall framework can be transported respectively.

Specifically, the first steel structure and double-rail traveling hoist system 41 includes a first steel structure 411 disposed opposite to each other, a traveling mechanism 412 disposed on the first steel structure 411 in a laterally movable manner, and a first endless chain hoist 413 disposed below the traveling mechanism 412 in a longitudinally movable manner. The lifting machine 42 includes a lifting machine base frame 421, a lifting platform 423 disposed in parallel above the lifting machine base frame 421, and a folding lifting mechanism 422 connected between the lifting machine base frame 421 and the lifting platform 423. The turnover mechanism 43 comprises a turnover arm 431, a turnover motor 432 and a turnover shaft 433, a gear 436 is arranged on the turnover shaft 433, the turnover motor 432 is in transmission connection with the gear 436 through a turnover shaft transmission mechanism 435, and the two ends of the turnover shaft 433 are vertically connected with the turnover arm 431; a walking motor 434 is arranged below the overturning motor 432, the walking motor 434 is connected with a walking transmission shaft 437, two ends of the walking transmission shaft 437 are provided with gear pulleys 438, a transmission belt 439 is meshed outside the gear pulleys 438, the transmission belt 439 is arranged inside the frame body 441, an overturning seat 440 is movably arranged on the frame body 441, an overturning shaft 433 is rotatably connected on the overturning seat 440, and the bottom of the overturning seat 440 is connected with the transmission belt 439.

Specifically, upset motor 432 can be provided with two speed reducers, cycloid speed reducer and worm gear speed reducer promptly, and worm gear speed reducer can be used to realize power-off protection locking, even the outage, also can utilize worm gear mechanical mechanism's reverse lock function, realizes the free rotation under the control trip shaft 433 electroless state to this drops under taking precautions against upset arm 431 electroless state.

Further, the first steel structure 411 is provided with waist rail anti-deformation tools 414 corresponding to the areas of the two ends of the turnover mechanism 43, and each waist rail anti-deformation tool 414 is provided with two positioning rods 415. And a waist rail anti-deformation tool 414 is arranged at the front surface repair welding station 4 and the back surface welding station 4, when the workpiece is turned over by 90 degrees, the back surface welding is carried out, and at the moment, the workpiece needs to be fixed by the anti-deformation waist rail anti-deformation tool 414, so that the deformation of the waist rail due to welding is prevented. The waist beam is leaned on the positioning arc-shaped rod, then the clamping device is folded through the air cylinder and the electric control system, so that the waist beam can be fixed, and the positioning clamping tool and the turnover mechanism have an interlocking function. The whole tool is located on one side of the steel structure, has a position adjusting function and does not interfere with other equipment.

The upper surfaces of the two first narrow plate chain conveyors 44 positioned at the two ends of the three first narrow plate chain conveyors 44 are 450mm higher than the upper surface of the frame body 441 of the turnover mechanism 43, the lengths of the three first narrow plate chain conveyors 44 are respectively 3.8m, 4.5m and 3.8m, and the total length of the three first narrow plate chain conveyors 44 is 12.5 m.

The middle one of the three first narrow plate chain conveyors 44 can move up and down with the lift 42, and the front and rear first narrow plate chain conveyors 44 are fixed in the up-down direction. The middle of the side wall framework 100 of the passenger car is provided with the turnover mechanism 43, the side wall framework 100 of the passenger car can be turned over by 0-180 degrees in situ, and the turnover mechanism 43 is inserted in the middle of the three first narrow plate chain conveyors 44, so that the three first narrow plate chain conveyors 44 are required to be made into 3 sections. The second side enclosure front welding station 2, the third side enclosure front welding station 3, the front repair welding and back welding station 4 are provided with a first steel structure and double-track walking hoist system 41, and the first ring chain hoists 413 of the two sets of the first steel structure and double-track walking hoist systems 41 can be lifted simultaneously. The working process is as follows: the passenger car side wall framework 100 is horizontally hung from the second side wall front welding station 2 or the third side wall front welding station 3 to the front repair welding and reverse welding station 4 by using a first ring chain hoist 413, placed on the turning arm 431 of the turning mechanism 43, and locked by using a locking device pre-equipped with the turning arm 431. After the side wall framework 100 of the passenger car is dismounted, the first steel structure and double-track traveling hoist system 41 returns to the front welding station.

The front repair welding (if needed) is firstly carried out on the left and right side wall frames at a front repair welding station 4 and a back welding station 4, then an in-situ 180-degree turnover mechanism 43 on the stations is used for turning over the side wall frame 100 of the passenger car to 90 degrees, taking the left side wall frame as an example, the left side wall frame is perpendicular to the ground, an operator stands to weld the middle and lower parts of the back, and a waist beam anti-deformation tool 414 is arranged at the position to position and clamp the waist beam of the left side wall frame to prevent the waist beam from deforming during welding. At last with work piece upset 180, tilting mechanism 43 needs the walking when the upset, and the upset arm 431 will walk the limit upset simultaneously promptly, just can realize the upset of 180 on the spot, then need descend 450mm with the first narrow plate chain conveyer 44 of interlude this moment, prevent to interfere with tilting mechanism 43, the action process is: 0-3 s, walking is not moved, and the workpiece is firstly turned for 12 degrees; 4-31 s, turning while walking, finally walking in place (stroke 3140mm), and turning for 168 degrees; and (4) turning the workpiece for 32-35 s for 12 degrees to be in a horizontal state. After the turning is finished, the workpiece (namely the side wall framework 100 of the passenger car) falls on the back surface repair welding and back surface polishing station 5, the workpiece is fixed by the workpiece clamping and positioning device 51, and then the upper part of the back surface of the side wall is welded. The use of an in-situ 180 degree turnover mechanism 43 improves squatting operations, is more convenient and quicker when turning over workpieces, and minimizes the required space. The driving part of the plate chain, the lifting machine 42 and the running gear of the turnover mechanism 43 are all positioned under the ground, and the space is effectively saved.

The reverse side repair welding and reverse side polishing station 5 is provided with a section of second narrow plate chain conveyor 50, two ends of the second narrow plate chain conveyor 50 are provided with workpiece clamping and positioning devices 51, the upper surface of the second narrow plate chain conveyor 50 is 450mm higher than the ground, the length of the second narrow plate chain conveyor is 12.5m, the first narrow plate chain conveyor 44 and the second narrow plate chain conveyor 50 are both provided with plate chains and rollers, the pitch of the plate chains is 80mm, and the diameter of the rollers is 60 mm. Be provided with laser detection system 52 in the pit below second narrow plate chain conveyer 50, use laser range finder to realize the automated inspection of work piece waist rail straightness accuracy, the course of work is: after the front surface repair welding and the back surface welding of the back surface welding station 4 are completed, the positioning and clamping device is opened, the workpiece is conveyed to the back surface repair welding and back surface polishing station 5 plate chains through plate chain conveying (the distance between the front surface repair welding and the back surface welding station 4 and the distance between the back surface repair welding and the back surface polishing station 5 plate chains is smaller), then the workpiece is fixed by the pneumatic positioning and clamping device, and the back surface repair welding and the back surface polishing work are carried out. The laser range finder (be located the work piece under) automated inspection waist rail outside after polishing can X, Y axle directions free movement, and detection device possesses the storage of data, the record function. The laser detection system 52 is integrally positioned in the pit below without interfering with other equipment, and a cover plate capable of being turned is arranged on the pit and turned over by using an oil cylinder. When laser ranging is needed, the turning plate is opened. Can be suitable for the positions of waist rails of different vehicle types. Two servo motor speed reducers are utilized to realize the random walking of the laser range finder on an X/Y plane. The walking track is a linear slide rail, so that the operation is accurate and the error is small. Meanwhile, a computer is equipped to process the relevant conditions of straightness accuracy.

The structure of the front grinding station 6 is similar to that of the front repair welding station and the back welding station 4, but the upper clamping and turning actions can be different according to actual requirements. The front surface repair welding and back surface welding station 4 and the front surface polishing station 6 are provided with turnover mechanisms 43 which are used for turning over the side wall frameworks with the front surfaces or the back surfaces upward in situ by 180 degrees so as to facilitate opposite welding or polishing, and the turnover process is stable and reliable and does not interfere with other equipment. Comprises a walking device and a turning device which are respectively provided with a motor reducer, the speed of the walking motor is 3.14m/31s, and the turning speed is 180 DEG/35 s. The distance between the two rotating arms is 5000mm, and when the turnover mechanism moves, the ground conveying equipment is automatically locked. The walking system has the advantages that the walking system is located underground, the space is effectively saved, and the action of turning 180 degrees in situ can be realized. This mechanism minimizes the space required for the flipping process. Two sets of second steel structure and double-track traveling hoist systems 61 which are arranged in parallel are arranged above the front polishing station 6. The sequencing storage device 7 is provided with a storage frame 72, a plurality of side wall frameworks 73 are arranged on the storage frame 72 side by side, and two sets of third steel structure and double-rail traveling hoist systems 71 which are arranged in parallel are arranged above the sequencing storage device 7; two sets of fourth steel structure and double-track traveling hoist systems 81 arranged in parallel are arranged above the transfer station 8.

Specifically, the second steel structure and double-rail walking hoist system 61 includes a second steel structure 611, two parallel first longitudinal rails 612, two parallel first transverse rails 613, and two second endless chain hoists 614 movably disposed below the two first transverse rails 613 respectively, wherein the first longitudinal rail 612 is vertically connected to the second steel structure 611, and the first transverse rail 613 is vertically and slidably connected to the first longitudinal rail 612. The third steel structure and double-rail walking hoist system 71 comprises a third steel structure 711, two second longitudinal rails 712 arranged in parallel and two second transverse rails 713 arranged in parallel, wherein the second longitudinal rails 712 are vertically connected with the third steel structure 711, and the second transverse rails 713 are vertically connected with the second longitudinal rails 712. The fourth steel structure and double-track walking hoist system 81 comprises a fourth steel structure 811, two third longitudinal rails 812 and two third transverse rails 813 which are arranged in parallel, and two third endless chain hoists 814 movably arranged below the third transverse rails 813, wherein the third longitudinal rails 812 are vertically connected with the fourth steel structure 811, and the third transverse rails 813 are vertically and slidably connected with the third longitudinal rails 812; the second steel structure 611, the third steel structure 711 and the fourth steel structure 811 are integrally connected. According to the welding assembly line for the side wall frameworks of the passenger car, a plurality of side wall frameworks, for example 6, can be placed under the action of the side wall framework 73 on the storage frame 72, and the distance between every two adjacent side wall frameworks can be 350 mm. The working process is as follows: and after the back surface repair welding and the back surface polishing of the skeleton at the back surface polishing station 5 are finished, conveying the workpiece to the front surface polishing station 6 through a plate chain. Then the workpiece is directly turned over by 180 degrees by using a turnover mechanism of the front polishing station 6, the front side of the workpiece faces upwards, and the front polishing is carried out after the workpiece is fixed by a pneumatic positioning and clamping device. And after the polishing work is finished, the workpiece is turned over by 90 degrees to prepare for hoisting and transporting to a next station.

The plate chain of the front polishing station 6, the front repair welding station and the back welding station 4 is formed by folding edges of a 4mm thick steel plate, and the upper supporting plate is made into a semicircular arc shape to ensure that the contact surface with the side wall framework is a smooth curved surface. The layer board material is cast iron, prevents the welding slag, and layer board thickness 25mm connects with the flat link chain bolt, convenient dismantlement. The roller travels on the quenching steel belt and travels on the roller in the return stroke, thereby prolonging the service life of the plate chain. The guard shield device has all been done to the plate link chain side, can effectively avoid welding slag dust debris to fall into the inside wearing and tearing machinery card that causes of plate link chain and hinder, the clean maintenance of being convenient for. The top of the guard plate is designed into a slope structure, so that dust and welding slag are not easy to accumulate. The driving part is positioned below the ground, so that the space can be saved, the protection is more favorable, and convenience is increased for workers to walk and operate. The front grinding station 6 and the front repair welding and back welding station 4 are respectively provided with a lifting machine for lifting a 4.5m narrow plate chain. The stroke is 450mm, and scissors formula lifting structure has that occupation of land space is little, operates steadily, and this platform machine of lifting bearing is 5T. Two hydraulic oil cylinders are used as power sources, so that the lifting machine cannot shake up and down when in a lifting state. When the turnover equipment works, the walking motor acts. The lifter together with the plate link should be brought to a falling state to prevent the plate link from interfering with the turnover device. The workpiece needs to be welded, polished and the like at the front repair welding and back welding station 4, the back repair welding and back polishing station 5 and the front polishing station 6, so that the workpiece needs to be limited and clamped by the workpiece clamping and positioning device 51, the workpiece clamping and positioning device 51 is an automatic clamping device with power, a cylinder is adopted as a power source, the position is adjustable, and the front and the back can be correspondingly adjusted according to different vehicle types, so that the requirements of all vehicle types can be met. The structure is compact, the occupied area is small, and the disassembly and the adjustment are convenient for manual work.

The sorting and storing device 7 is provided with an operation box, and the storage rack can be moved at a fixed distance by pressing a button on the operation box. The working process of the sequencing storage device 7 is as follows: the workpiece is lifted from the front grinding station 6 by the second steel and double-rail traveling hoist system 61, and then the first cross rail 613 is moved so that the first cross rail 613 and the second cross rail 713 are in rail joint, and the second chain hoist 614 can be moved to the sorting storage device 7. The 6 storage units of the storage rack are sequentially numbered as C1, C2, C3, C4, C5 and C6. The initial position C1 is directly below the rail, the workpiece will first fall above C1. Then the operation button is pressed, the whole storage rack moves 350mm vertical to the wire body, at the moment, the C2 is positioned under the track, the next workpiece falls onto the C2, and so on, and after the 6 storage units are all loaded into the workpieces. And then sequentially taking out C6, preferentially taking out C6, pressing an operation button similarly, moving C5 to the lower part of the track, and taking out C5.. Furthermore, the following functions can also be added electrically according to the prior art: after pressing the corresponding button, the storage unit with any vacant position can be controlled to move to the lowest part of the track.

The 8 working processes of transfer station do: when the storage racks of the sorting and storing device 7 are full of 6 side wall frameworks, the third transverse rail 813 is operated to be connected with the second transverse rail 713 in an abutting mode, the third chain hoist 814 enters the second transverse rail 713, is sequentially taken out according to the storage rack numbers C6, C5, C4, C3, C2 and C1 or taken out according to any sequence, and is hoisted to the transfer trolley of the transfer station 8, and the transfer trolley can be used for containing 6 left side walls and 6 right side walls at one time.

The welding side wall framework assembly line designed by the invention mainly follows the following points: on the basis of ensuring the primary safety, the whole equipment has stronger operability, simpler and more economical process and more compact and beautiful appearance.

Safety: all design bases should be developed on the basis of safety, wherein the design bases comprise equipment safety and personal safety, the personal safety is the main position, dangerous items possibly generated during operation of workers can be fully considered, and optimization is achieved during design, and the design is most reasonable. All dangerous operations are avoided. On the basis of ensuring the absolute safety of equipment, potential safety hazards can be eliminated (such as cover plates at pits and gaps and rounding of sharp corners and edges of the equipment). The welding side wall framework assembly line provided by the invention sets the sizes of corresponding parts according to the proximity height of an operator, so that the operation of the operator is better met, for example, the height of the turnover arm is 410mm and the height of the plate chain is 450mm, and the operation of the operator is facilitated to the maximum extent. For another example, the 450mm size is below the knee in order to allow better passage for the operator.

And (3) operability of workers: the assembly line is mainly for workman's welding, the usefulness of polishing, therefore the plate link chain design height, and the upset form of upset machine all is for operator's convenience consideration.

The device structure is as follows: on the basis of meeting the requirements of the owners, the equipment is simpler, lower in energy consumption and more convenient to operate.

Cost performance: and making an optimal scheme under the comprehensive evaluation of equipment structure, material selection, outsourcing part manufacturers and the like.

Maintenance and repair: the failure rate of the whole equipment is low, and the selected materials have universality and are convenient to maintain and replace.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. A welding assembly line for side wall frameworks of passenger cars is characterized by comprising a first side wall front welding station (1), a second side wall front welding station (2), a third side wall front welding station (3), a front repair welding and reverse welding station (4), a reverse repair welding and reverse polishing station (5), a front polishing station (6), a sequencing storage device (7) and a transfer station (8) which are sequentially arranged;

the front repair welding and back welding station (4) comprises three sections of first narrow plate chain conveyors (44) which are sequentially arranged at intervals, a lifter (42) is arranged below one section of the first narrow plate chain conveyor (44) in the middle of the three sections of the first narrow plate chain conveyors (44), a turnover mechanism (43) is arranged between the three sections of the first narrow plate chain conveyors (44), and two sets of first steel-structure and double-track traveling hoist systems (41) which are arranged in parallel are arranged above the first side-enclosure front welding station (1), the second side-enclosure front welding station (2), the third side-enclosure front welding station (3) and the front repair welding and back welding station (4); the back surface repair welding and back surface polishing station (5) is provided with a section of second narrow plate chain conveyor (50), two ends of the second narrow plate chain conveyor (50) are provided with workpiece clamping and positioning devices (51), and two sets of second steel structure and double-track traveling hoist systems (61) which are arranged in parallel are arranged above the front surface polishing station (6); the sorting storage device (7) is provided with a storage frame (72), a plurality of side wall frameworks (73) are arranged on the storage frame (72) side by side, and two sets of third steel structure and double-rail traveling hoist systems (71) which are arranged in parallel are arranged above the sorting storage device (7); and two sets of fourth steel structures arranged in parallel and a double-track walking hoist system (81) are arranged above the transfer station (8).

2. The welding assembly line for the side wall frameworks of the passenger car according to claim 1, wherein a welding fixture placing vehicle (21) is arranged in the second side wall front welding station (2) or the third side wall front welding station (3), the welding fixture placing vehicle (21) is provided with a lithium battery (22), a direct current motor (23), a transmission assembly (24) and a wheel (25), the lithium battery (22) is electrically connected with the direct current motor (23), and the direct current motor (23) is in transmission connection with the wheel (25) through the transmission assembly (24).

3. The welding assembly line for the side wall frameworks of the passenger cars according to claim 1, wherein the first steel structure and double-rail walking hoist system (41) comprises a first steel structure (411) arranged oppositely, a walking mechanism (412) transversely movably arranged on the first steel structure (411), and a first endless chain hoist (413) longitudinally movably arranged below the walking mechanism (412).

4. The welding assembly line for the side wall frameworks of the passenger car according to claim 1, wherein the second steel structure and double-rail walking hoist system (61) comprises a second steel structure (611), two first parallel longitudinal rails (612), two first parallel transverse rails (613) and two second chain hoists (614) movably arranged below the two first transverse rails (613), the first longitudinal rails (612) are vertically connected with the second steel structure (611), and the first transverse rails (613) are vertically and slidably connected with the first longitudinal rails (612);

the third steel structure and double-rail walking hoist system (71) comprises a third steel structure (711), two second longitudinal rails (712) arranged in parallel and two second transverse rails (713) arranged in parallel, wherein the second longitudinal rails (712) are vertically connected with the third steel structure (711), and the second transverse rails (713) are vertically connected with the second longitudinal rails (712);

the fourth steel structure and double-track walking hoist system (81) comprises a fourth steel structure (811), two third longitudinal rails (812) arranged in parallel, a third transverse rail (813) and two third ring chain hoists (814) movably arranged below the third transverse rail (813), wherein the third longitudinal rail (812) is vertically connected with the fourth steel structure (811), and the third transverse rail (813) is vertically and slidably connected with the third longitudinal rail (812); the second steel structure (611), the third steel structure (711) and the fourth steel structure (811) are connected into a whole.

5. The welding assembly line for the side wall frameworks of the passenger cars according to claim 1, wherein the lifting machine (42) comprises a lifting machine underframe (421), a lifting platform (423) arranged above the lifting machine underframe (421) in parallel, and a folding lifting mechanism (422) connected between the lifting machine underframe (421) and the lifting platform (423).

6. The passenger car side wall framework welding assembly line of claim 1, wherein the turnover mechanism (43) comprises a turnover arm (431), a turnover motor (432) and a turnover shaft (433), a gear (436) is arranged on the turnover shaft (433), the turnover motor (432) is in transmission connection with the gear (436) through a turnover shaft transmission mechanism (435), and the turnover arm (431) is vertically connected to two ends of the turnover shaft (433); the utility model discloses a rack, including upset motor (432), walking motor (434) are connected with walking transmission shaft (437), walking transmission shaft (437) both ends are provided with toothed belt wheel (438), toothed belt wheel (438) external toothing has conveyer belt (439), conveyer belt (439) set up inside support body (441), movably on support body (441) be provided with upset seat (440), upset axle (433) rotate connect in on upset seat (440), upset seat (440) bottom is connected with conveyer belt (439), upset motor (432) are provided with cycloid speed reducer and worm gear speed reducer.

7. The passenger car side wall framework welding assembly line of claim 1, wherein two waist rail anti-deformation tools (414) are respectively arranged on the first steel structure (411) corresponding to the areas of the two ends of the turnover mechanism (43), and each waist rail anti-deformation tool (414) is provided with two positioning rods (415).

8. The welding assembly line for the side wall frameworks of the passenger cars according to claim 1, wherein the upper surfaces of two sections of the first narrow plate chain conveyors (44) at two ends of the three sections of the first narrow plate chain conveyors (44) are 450mm higher than the upper surface of the frame body (441) of the turnover mechanism (43), the lengths of the three sections of the first narrow plate chain conveyors (44) are respectively 3.8m, 4.5m and 3.8m, the total length of the three sections of the first narrow plate chain conveyors (44) is 12.5m, and the upper surface of the second narrow plate chain conveyor (50) is 450mm higher than the ground and 12.5 m.

9. The passenger car side wall frame welding assembly line of claim 1, wherein the first narrow plate chain conveyor (44) and the second narrow plate chain conveyor (50) are provided with plate chains and rollers, the plate chains are 80mm in pitch, and the rollers are 60mm in diameter.

Images