CN114012309B

CN114012309B - Assembling method of transportation frame

Info

Publication number: CN114012309B
Application number: CN202111181527.5A
Authority: CN
Inventors: 张文胜; 冯进; 邱涛; 程政; 林飞; 管洪严; 刘华学; 易飞; 唐博谦; 熊伟; 冯琰; 刘晓萌; 龙梅; 李斌; 杨新启; 程琪
Original assignee: CRRC Yangtze Co Ltd
Current assignee: CRRC Yangtze Co Ltd
Priority date: 2021-10-11
Filing date: 2021-10-11
Publication date: 2024-02-13
Anticipated expiration: 2041-10-11
Also published as: CN114012309A

Abstract

The invention belongs to the technical field of mechanical manufacturing, and discloses an assembly method of a transportation frame, which comprises the following steps: the method comprises the steps of splicing plates of a lower cover plate and an upper cover plate of a middle beam of a transport vehicle, wherein the straightness of the lower cover plate and the upper cover plate is smaller than or equal to a straightness set threshold, and the interval of welding seams of the lower cover plate and the upper cover plate in the length direction is larger than or equal to a welding seam interval threshold; splicing webs of the middle beam of the transport vehicle, and assembling and welding reinforcing rings on the webs; positioning and supporting a lower cover plate, and taking the lower cover plate as a benchmark for assembling a middle beam; positioning and spot welding the web plate on the lower cover plate; positioning and spot-welding the upper cover plate on the web plate to obtain a middle beam main body; symmetrically arranging welding areas on the center of the middle beam main body in the length direction of the lower cover plate, and synchronously welding seams; in the same welding area, the welding seam between the lower cover plate and the web plate is welded in equal length, and the welding seam between the upper cover plate and the web plate is welded. The assembling method provided by the invention can solve the problems of high assembling quality control difficulty and high manufacturing cost of the transportation frame.

Description

Assembling method of transportation frame

Technical Field

The invention relates to the technical field of mechanical manufacturing, in particular to an assembly method of a transportation frame.

Background

The transportation frame of railway vehicles and empty rail vehicles is a steel structural member and has the characteristics of high strength, large bearing capacity, small dead weight, complex structure and the like. Therefore, the product has the problems of high processing difficulty, high process requirement and long construction period in production and manufacture; if the frame structure is long, the upper cover plate, the lower cover plate and the web plate of the middle beam are spliced after being subjected to sectional blanking, and then the upper cover plate, the lower cover plate and the web plate are assembled into the box-shaped structural beam.

Disclosure of Invention

The invention provides an assembly method of a transportation frame, which aims to solve the technical problems of high strength, large bearing capacity, small dead weight, large assembly quality control difficulty of the transportation frame with a complex structure and high manufacturing cost to a certain extent.

In order to solve the technical problems, the invention provides an assembly method of a transportation frame, comprising the following steps:

splicing plates of a lower cover plate and an upper cover plate of a middle beam of a transport vehicle, wherein the straightness of the lower cover plate and the straightness of the upper cover plate are smaller than or equal to a straightness set threshold, and the interval of welding seams of the lower cover plate and the upper cover plate in the length direction is larger than or equal to a welding seam interval threshold;

splicing webs of the middle beam of the transport vehicle, and assembling and welding reinforcing rings on the webs;

positioning and supporting the lower cover plate, and taking the lower cover plate as a benchmark for assembling the middle beam;

positioning and spot welding the web to the lower cover plate;

positioning and spot-welding the upper cover plate on the web plate to obtain a middle beam main body;

symmetrically arranging welding areas on the center of the middle beam main body in the length direction of the lower cover plate, and synchronously welding seams;

and in the same welding area, welding seams between the lower cover plate and the web plate and welding seams between the upper cover plate and the web plate are welded in equal length.

Further, the plate material of the lower cover plate of the middle beam of the spliced transport vehicle comprises:

setting a plurality of positioning blocks along the length direction of a set lower cover plate as a first positioning reference, and adaptively adjusting the distance size of a control frame of the plate to be welded to be positioned in a distance setting interval of the frame based on the first positioning reference;

arranging arc striking plates at two ends of a welding seam of two adjacent plates to be welded, and spot-welding the welding seam of the two adjacent plates to be welded at intervals of 50mm under the condition that the plane of the welding seam is not misplaced;

prefabricating a first reverse deformation amount in the plane direction of the area of the welding seam, and compacting plates at two sides of the welding seam by using a spiral compacting device;

the welding seam is welded from two ends of the welding seam to the middle part in a segmented mode;

wherein the straightness setting threshold is 3mm, and the weld interval threshold is 500mm.

Further, the first amount of reverse deformation is 8mm.

Further, the width of the area of the welding seam is within 1500mm on two sides of the welding seam.

Further, the distance setting interval of the frame is 9500+/-3 mm.

Further, the web of the beam in the spliced transport vehicle comprises:

drawing web position curves on a splicing platform through lofting, and respectively arranging a plurality of positioning blocks along the length direction of each web plate at the lower edges of two ends of each web plate according to the length of each plate to serve as second positioning references;

splicing web plates according to the second positioning reference, compacting and fixing the web plates, ensuring consistent splicing gaps and reserving welding seam shrinkage allowance;

performing joint spot welding on two ends of a welding seam, and then sequentially completing spot welding of the whole welding seam at intervals of 50mm under the condition that the integral curves of all web plates spliced meet the position curve;

arc striking plates are additionally arranged at two ends of a welding seam, and the reverse deformation is prefabricated in the plane direction of the welding seam part between two adjacent web plate materials, and each web plate material is pressed and fixed;

and welding a welding seam between two adjacent web plates.

Further, the positioning and spot welding the web to the lower cover plate includes:

positioning the mounting position of the middle beam inner partition plate on the lower cover plate;

sequentially welding the middle beam inner partition plates from the middle area of the lower cover plate to two sides corresponding to the installation positions;

and respectively taking the longitudinal center line of the lower cover plate and the middle beam inner partition plate as references, and respectively spot-welding webs on the lower cover plate from the middle part of the lower cover plate to two ends.

Further, the positioning and spot welding the upper cover plate to the web includes:

and respectively spot-welding the upper cover plate on the web plate from the middle part to two ends of the upper cover plate by taking the longitudinal center line of the lower cover plate and the inner partition plate of the middle beam as references.

Further, the center sill main body is fixed to the turnover welding device through a clamping device.

Further, in the same welding area, the welding seam between the lower cover plate and the web and the welding seam between the upper cover plate and the web, which are welded in equal length, comprise:

welding a first length of a weld of the lower cover plate and the web in the same welding area;

turning over the middle beam main body, and welding the first length of the welding seam between the upper cover plate and the web plate;

and repeatedly overturning the middle beam main body, and alternately welding the welding seams of the lower cover plate and the web plate and the welding seams of the upper cover plate and the web plate until all welding seams are welded.

One or more technical solutions provided in the embodiments of the present application at least have the following technical effects or advantages:

according to the assembly method of the transportation frame, when the upper cover plate, the lower cover plate and the web plate of the middle beam are spliced, the welding seams are controlled to be arranged in a staggered mode when the spliced plates are welded, the straightness control load is controlled to be less than 3mm, the splicing deflection parameters are controlled, and the welding deformation is limited. After the middle beam is assembled, an integral welding procedure is carried out, and before welding, all clamping devices are used for rigidly fixing the whole middle beam, and then welding operation is carried out. In order to cope with the conditions of large length and low rigidity of the middle beam, the web plates, the upper cover plate and the lower cover plate are all bevel angle welding seams, the welding quantity is large, the whole middle beam is easy to generate transverse bending deformation along the length direction and deflection deformation along the vertical direction, the transverse bending deformation of the middle beam and the deflection deformation of the middle beam in the vertical direction are strictly controlled to be strictly welding deformation by controlling the welding process, and the assembly quality is ensured. Specifically, in order to control the transverse bending deformation of the middle beam, a welding mode of transversely symmetrical and simultaneous welding is adopted during welding, so that the welding stress on two sides is counteracted, and the purpose of controlling the transverse bending deformation of the middle beam is achieved. In order to control deflection deformation of the middle beam in the vertical direction, after a lower cover plate is welded with a web plate for a certain length, the middle beam is turned over, and the upper cover plate and the web plate are welded for the same length, so that the welding stress generated by welding the upper cover plate, the lower cover plate and the web plate is offset, and the purpose of controlling deformation in the vertical direction is achieved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a flow chart of a method of assembling a transportation frame according to an embodiment of the present invention;

fig. 2 is a schematic diagram of splicing a plate material of a lower cover plate according to an embodiment of the present invention;

fig. 3 is a schematic diagram of splicing plates of an upper cover plate according to an embodiment of the present invention;

fig. 4 is a schematic diagram of plate splicing of a lower cover plate according to an embodiment of the present invention;

fig. 5 is a schematic layout view of a lower cover plate weld arc striking plate according to an embodiment of the present invention;

FIG. 6 is a schematic view of a welding arrangement of webs provided by an embodiment of the present invention;

FIG. 7 is a schematic diagram of a plate splicing arrangement of a web plate according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of a position curve provided by an embodiment of the present invention;

fig. 9 is a front view of a center sill turnover welding fixation provided by an embodiment of the present invention;

fig. 10 is a top view of a center sill turnover welding fixture according to an embodiment of the present invention;

fig. 11 is a left side view of the center sill turnover welding fixation according to the embodiment of the present invention.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

It should be noted that all the directional indicators in the embodiments of the present application are only used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture, and if the specific posture is changed, the directional indicators are correspondingly changed.

The following disclosure provides many different embodiments, or examples, for implementing different structures of the application. In order to simplify the disclosure of the present application, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. Furthermore, the present application may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not in themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize the application of other processes and/or the use of other materials.

The present application is described below with reference to specific embodiments in conjunction with the accompanying drawings.

The embodiment of the application aims to solve the technical problems of high strength, large bearing capacity, small dead weight, large assembly quality control difficulty of the transportation frame with a complex structure and high manufacturing cost to a certain extent at least by providing the assembly method of the transportation frame.

In order to better understand the above technical solutions, the following detailed description will be made with reference to the accompanying drawings and specific embodiments, and it should be understood that specific features in the embodiments and examples of the present invention are detailed descriptions of the technical solutions of the present application, and not limit the technical solutions of the present application, and the technical features in the embodiments and examples of the present application may be combined with each other without conflict.

Referring to fig. 1, the embodiment provides an assembling method of a transportation frame, which is used in the fields of railway vehicles, empty rail manufacturing and the like, and aims at the assembling of an empty rail container transportation frame, so as to achieve the effects of improving the assembling quality, reducing the cost and optimizing the operation flow.

The method for assembling the transportation frame provided by the embodiment comprises the following steps:

the method comprises the steps of splicing plates of a lower cover plate and an upper cover plate of a middle beam of a transport vehicle, wherein the straightness of the lower cover plate and the upper cover plate is less than or equal to 3mm, and the interval between welding seams of the lower cover plate and the upper cover plate in the length direction is more than or equal to 500mm;

positioning and spot welding the web to the lower cover plate;

The assembly operation method and steps will be specifically described below, respectively.

The transportation frame is large in size and complex in structure, and therefore the transportation frame is realized in a mode of splicing plates and integrally welding. The middle beam is usually molded firstly, then related parts such as a fixed sleeper, a cross beam, a middle lifting winch cross beam, a storage battery mounting seat, a parallel beam, a small cross beam and the like are assembled on the middle beam, and finally, the frame is comprehensively turned and welded by means of turning tools of other vehicle types. The assembly quality of the middle beam plays a decisive role in the quality of the frame, and the quality control difficulty is the greatest.

Referring to fig. 2, 3, 7 and 8, the center sill is mainly assembled from a lower deck 100, an upper deck 200 and a web 500 therebetween. Meanwhile, the lower cover plate 100, the upper cover plate 200 and the web 500 may be formed by splicing and welding a plurality of plates.

For ease of illustration, a product up to 14464.7mm is illustrated. The whole blanking has higher requirements on materials and equipment, and is not beneficial to reducing the manufacturing cost. Meanwhile, in order to reduce the dead weight of the frame, according to the analysis of the bearing force of the product, all sections of the web plate can be spliced by adopting plates with different thicknesses, a certain deflection is formed, and the aim of reducing the dead weight is fulfilled while the process requirement is met.

Referring to fig. 2 and 3, the lower cover plate 100 and the upper cover plate 200 have a plate thickness of 12mm, and are formed by splicing two plates.

The lower cover splicing area 110 of the lower cover 100 may be other values from the center line to 1500mm on each side. Similarly, the upper deck splice area 210 of the upper deck 200 terminates 1500mm from the midline to each side. In order to ensure the safety of the middle beam, the joint interface of the upper cover plate 200 and the lower cover plate 100 is staggered by not less than 500mm. After splicing, the distance (stress point) of the frame is 9500+/-3 mm, and the full length straightness is not more than 3mm. It is worth noting that the flatness after welding is required to be strictly controlled, the spliced part cannot be obviously bent and deformed, and the welding seam is subjected to magnetic powder and ultrasonic flaw detection after 24 hours of welding according to the authentication grade of the part.

Referring to fig. 2, 7 and 8, when the lower cover plate 100 is spliced, a plurality of positioning blocks 300 are set along the length direction of the set lower cover plate 100 as first positioning references, and the distance size of the to-be-welded plate control frame is adjusted to be 9500 + -3 mm in the frame distance setting interval based on the first positioning references.

Arc striking plates 120 are arranged at two ends of a welding line 130 of two adjacent plates to be welded, and welding lines 140 are arranged on the arc striking plates 120, and under the condition that the welding line planes are not misplaced, the welding lines of the two adjacent plates to be welded are spot-welded at intervals of 50 mm.

Prefabricating a first reverse deformation amount in the plane direction of the area of the welding seam, wherein the first reverse deformation amount can be set to be 8mm; and the screw pressing device 410 is used for pressing plates on two sides of the welding line, so that the alignment stability of the welding line is ensured. Then, the weld 130 is welded from both ends of the weld 130 toward the middle section.

In this embodiment, the positioning blocks 300 may be block-shaped structural members with a specification of 20×50×50mm, and may be set along the length direction of the lower cover plate 100 to be four-point positioning references, that is, two corresponding lower cover plate materials are respectively positioned by two positioning blocks 300, and the four positioning blocks 300 are set by uniform labels, so as to ensure that the positioning references are consistent; and the straightness of the spliced components is guaranteed. The frame spacing size is 9504mm when the splicing part is corrected to ensure that the frame spacing size is 9500+/-3 mm after the welding seam shrinkage of 1 mm is reserved after the upper limit size is generally required to be taken.

When in splicing, the two ends of the welding seam are subjected to connection spot welding firstly, after the fact that the straightness of the part is not influenced by the spot welding is checked and confirmed, the interval is 50mm, after the fact that the planes are free of dislocation is guaranteed, the spot welding of the whole welding seam is sequentially completed, and arc striking plates are additionally arranged at the two ends of the welding seam.

After the welding is completed, the reverse deformation of 8mm is prefabricated in the plane direction of the welding seam, and the welding operation is performed after the two sides of the welding seam are pressed by using a spiral pressing device, so that the flatness of the welding seam after the welding is completed can meet the technological requirements.

During welding, a welding sequence from two ends to the middle section is adopted, so that the influence of welding shrinkage on the straightness of the component is reduced. Before the back surface welding, the back chipping treatment is carried out on the welding line by utilizing a carbon arc gouging machine, and the welding is carried out after the back chipping treatment is polished cleanly, so that the welding quality is ensured to meet the technological requirements.

In preparation for welding, a support pad 610 or the like is required to ensure alignment of the lower cover plate blank and the striking plate to be welded.

The upper cover plate 200 is integrally in an arc-like structure, and the upper cover plate is in a ladder shape, so that the support at two ends of a plate material needs to be improved by 200mm during splicing, and other operation procedures are the same as those of the lower cover plate 100.

In this embodiment, the middle beam web 500 is formed by splicing five plates, and the whole shape is a pattern with raised middle part and sunk two sides. The thickness of the plates at the two ends is 12mm, and the thickness of the three plates in the middle is 16mm.

Referring to fig. 6, the bottom and top edges of the center sill web 500 are provided with grooves, and the grooves of the two center sill webs 500 are oppositely oriented so that they are welded outwardly during assembly. During splicing, the inner side surface of the middle beam is used as a web datum plane, and the two grooves on the two sides of the web can be distinguished during splicing.

The splicing operation method specifically comprises the following steps:

the web position curve 520 is drawn on the splicing platform through lofting, and a plurality of positioning blocks 300 are respectively arranged at the lower edges of the two ends of each web plate according to the length of each plate along the length direction of the plate to serve as second positioning references.

And splicing web plates according to the second positioning reference, compacting and fixing, ensuring consistent splicing gaps and reserving welding seam shrinkage allowance.

And (3) performing connection spot welding on two ends of the welding seam, and then sequentially completing spot welding of the whole welding seam at intervals of 50mm under the condition that the integral curves of the spliced web plates conform to the position curves.

Arc striking plates are additionally arranged at two ends of a welding line, the reverse deformation is prefabricated in the plane direction of the welding line part between two adjacent web plate materials, each web plate material is pressed and fixed, and then the welding line between the two adjacent web plate materials is welded.

Referring to fig. 7 and 8, specifically, a curve of 15mm deflection between distances and 4mm positions where the two ends sink is drawn on the splicing platform through lofting.

According to the length of each process piece, two-point positioning references are respectively arranged in the directions close to the lower edges of the two ends of each web plate material along the length direction of the piece by utilizing the positioning blocks 300, so that the integral curvilinearity of the spliced piece is ensured to meet the process requirement; by adjusting the splicing gaps among the plates, the splicing gaps are consistent after the length dimension of the web plate is ensured.

Because the web is composed of five plates, the number of welding seams is large, the influence of welding seam shrinkage on the overall length dimension of the part should be considered during splicing, a certain shrinkage allowance should be reserved, the overall length dimension during splicing is set to 14470mm according to practical experience, and the web molding dimension is 14464.7mm.

Because the thickness of each web is different, before splicing, a process cushion block is placed at the corresponding position of each welding seam, when in splicing, the process cushion block is used as a reference, and the adjacent two plates are tightly pressed by using a spiral pressing device, so that the lower plane of the splicing is ensured to have no dislocation.

During splicing, the two ends of the welding seam are subjected to joint spot welding, after the integral curve of the web is checked to correspond to the position curve after spot welding, the interval is 50mm, the spot welding of the whole welding seam is sequentially completed, and the arc striking plates are additionally arranged at the two ends of the welding seam.

After splicing, prefabricating 8mm reverse deformation in the plane direction of a welding seam part between the plates at two ends and the adjacent plates, prefabricating 10mm reverse deformation in the plane direction of a welding seam part between the plates at the middle part, compacting two sides of each welding seam by using a spiral compacting device, and then welding, so that the flatness of the spliced part after welding is finished is ensured to meet the technological requirement.

Referring to fig. 6, after the splicing of the center sill web is completed, since the welding of the lower side weld of the reinforcing ring 510 on the inner side of the center sill web is inconvenient after the assembly of the center sill, the reinforcing ring 520 should be assembled and welded at the place, and then the whole assembly of the center sill in the next process is performed.

In order to control the welding deformation of the reinforcing ring 520, the outer side surface of the middle beam web plate can be rigidly fixed by utilizing channel steel before the welding of the reinforcing ring 520, and the integral rigidity of the web plate is also reinforced, so that the lifting is convenient during assembly.

A plane on the tooling is respectively provided with five-point high supports of the center, the distance and the two ends according to deflection parameters of the middle beam by using a level gauge, so that the deflection requirement of the assembled middle beam is ensured; the longitudinal side of each height support is used for positioning the five-point middle beam lower cover plate transversely along the length direction by using a 20X 50mm positioning block and taking the edge of the middle beam lower cover plate as a reference, meanwhile, one end part of the positioning block is provided with the end part of the middle beam lower cover plate for positioning, and the corresponding positioning parts are respectively provided with a spiral clamping device, and when the positioning block is assembled, the middle beam lower cover plate is firstly positioned by using the supporting, positioning and clamping devices, so that the positioning block is used as a main body

It is worth to say that, in order to strengthen the structure, be provided with the baffle in the center sill, realize upper and lower apron and center sill web's stable fixed and support.

For this, the installation position of the middle beam inner bulkhead is positioned on the lower deck plate 100 at the time of spot welding the middle beam web 500; and corresponding to the installation position, sequentially welding the middle beam inner partition plates from the middle area of the lower cover plate 100 to two sides, and controlling the deformation generated by the fillet weld by using an auxiliary support.

The webs 500 are spot-welded to the lower deck 100 from the middle to both ends thereof, respectively, with reference to the longitudinal center line of the lower deck 100 and the inner partition of the center sill, respectively.

Referring to fig. 9, 10 and 11, when in assembly, the center, the distance and the two ends are respectively provided with five-point high supports according to the deflection parameters of the middle beam by using a level gauge, so as to ensure the deflection requirement of the assembled middle beam; the longitudinal side of each height support is provided with a positioning block by taking the edge of the middle beam lower cover plate 100 as a reference, five-point middle beam lower cover plates are transversely positioned along the length direction, meanwhile, one end part of each positioning block is provided with the middle beam lower cover plate end part for positioning, and the corresponding positioning parts are respectively provided with a spiral clamping device.

After the middle beam lower cover plate 100 is positioned, the installation position line of each inner partition plate in the middle beam is firstly drawn, or a sample bar can be used for positioning or turnover positioning devices are installed on two sides of the tool, and the inner partition plates of the middle beam are firstly installed and respectively provided with left and right webs. Because the middle of the web plate is wider, the partition plate and the lower cover plate are inconvenient to weld after assembly, the position welding can be performed first, and the deformation generated by the fillet weld is controlled by using the auxiliary support.

After the assembly of the webs on the two sides is completed, the webs 500 are welded with the fillet welds in the lower cover plate 100, after the assembly is completed, the assembly and turning welding of parts such as the wire slots in the middle beam are performed, and then the upper cover plate of the middle beam is assembled. And welding after the assembly of the middle beam upper cover plate with the external welding seam and the like is finished, so that the whole welding deformation of the middle beam is controlled.

Middle beam upper cover plate assembly

When the middle beam upper cover plate 200 is assembled, the transverse direction and the longitudinal direction are all based on the middle beam lower cover plate. Because the upper cover plate 200 is in a ladder shape, two sides are bent twice, and in order to ensure the matching of the bending part and the web corner, the spot welding sequence from the middle to the two ends in sequence should be strictly controlled.

When the web 500 is assembled, a clamping force is applied to the upper side and the both sides of the web by the longitudinal center line thereof overlapping with the longitudinal center line of the lower deck 100 and the transverse direction by the center sill inner panel. The upper part is tightly pressed by using a balancing weight or a door-shaped framework and a small jack, and the left side and the right side of the upper part clamp the web by adopting two spiral clamping devices which can be transversely adjusted along the web. The assembly is performed by assembling spot welding from the middle to the two ends in sequence.

The middle beam main body is fixed on the turnover welding device through the clamping device. Welding a first length of a weld of the lower cover plate and the web in the same welding area; turning over the middle beam main body, and welding the first length of the welding seam between the upper cover plate and the web plate; and repeatedly overturning the middle beam main body, and alternately welding the welding seams of the lower cover plate and the web plate and the welding seams of the upper cover plate and the web plate until all welding seams are welded.

The welding and deformation control of the middle beam are realized by the following processes:

after the middle beam is assembled, an integral welding procedure is carried out, and before welding, the middle beam main body is rigidly fixed by utilizing a clamping device, and then welding operation is carried out. Because the length of the middle beam is longer, the rigidity is relatively poor, the web plates, the upper cover plate and the lower cover plate are all bevel angle welding seams, the welding quantity is large, and the whole middle beam is easy to generate transverse bending deformation along the length direction and deflection deformation along the vertical direction. In order to strictly weld deformation, a welding process is set in a targeted manner.

In order to control the transverse bending deformation of the middle beam, a welding mode of transverse symmetry and simultaneous welding is adopted during welding, and parameters such as welding current, welding speed and the like at two sides are strictly controlled, so that the welding stress at two sides is counteracted, and the purpose of controlling the transverse bending deformation of the middle beam is achieved.

In order to control the deflection deformation of the middle beam in the vertical direction, after the lower cover plate is welded with the web plate for a certain length, the middle beam is turned over, and the upper cover plate is welded with the web plate for the same length, so that the welding stress generated by the welding of the upper cover plate and the lower cover plate with the web plate is counteracted, and the purpose of controlling the deformation in the vertical direction is achieved. And after repeated overturning for several times, the whole welding of the middle beam is finished, and after the middle beam is cooled, the clamping device can be dismantled to assemble other accessories.

In order to reduce the manufacturing cost, the frame assembling device is manufactured by taking the main body of the middle beam assembling device as the basis and adding related positioning, supporting and clamping devices of the pillow and the cross beam.

A horizontal support is arranged below the end parts of the pillow and the cross beam, and a spiral clamping device is arranged at the end head; screw clamping devices are arranged on the left side and the right side for position adjustment and clamping during assembly; when in assembly, the level gauge is used for ensuring that the plane is required to be assembled with the pillow, the cross beam and the like. After the sleeper and the cross beam are assembled, the middle lifting hoisting cross beam, the storage battery mounting seat, the parallel beam, the small cross beam and other related parts are assembled, and finally, the frame is comprehensively welded by means of other vehicle type overturning tools.

In the present application, unless explicitly specified and limited otherwise, the terms "coupled," "secured," and the like are to be construed broadly, and for example, "secured" may be either permanently attached or removably attached, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," etc. indicate or are based on the orientation or positional relationship shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.

In addition, descriptions such as those related to "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated in this application. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be regarded as not exist and not within the protection scope of the present application.

In the description of the present invention, unless explicitly stated and limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, or may include both the first and second features not being in direct contact but being in contact by another feature therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, one skilled in the art can combine and combine the different embodiments or examples described in this specification

While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the application.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.

Claims

1. A method of assembling a transportation frame, comprising:

positioning and supporting the lower cover plate, positioning and spot-welding the web plate on the lower cover plate by taking the lower cover plate as a standard for assembling a middle beam, positioning and spot-welding the upper cover plate on the web plate, and obtaining a middle beam main body;

a welding area is symmetrically arranged on the center of the middle beam main body in the length direction of the lower cover plate, and welding seams are synchronously welded, wherein in the same welding area, the welding seams between the lower cover plate and the web plate and the welding seams between the upper cover plate and the web plate are welded in equal length;

the sheet material of the lower cover plate of the middle beam of the spliced transport vehicle comprises:

and the welding seam is welded from two ends of the welding seam to the middle part in a segmented way.

2. A method of assembling a transportation vehicle frame as defined in claim 1, wherein the first amount of counter deformation is 8mm.

3. The method of assembling a transportation vehicle frame of claim 1, wherein the width of the region of the weld is within 1500mm of each side of the weld.

4. The method of assembling a transportation vehicle frame of claim 1, wherein the vehicle frame spacing setting interval is 9500±3mm.

5. The method of assembling a transportation vehicle frame of claim 1, wherein the web of the spliced transportation vehicle center sill comprises:

and welding a welding seam between two adjacent web plates.

6. The method of assembling a transportation vehicle frame of claim 1, wherein said positioning and spot welding said web to said lower deck comprises:

7. The method of assembling a transportation vehicle frame of claim 6, wherein said positioning and spot welding said upper cover plate to said web comprises:

8. The method of assembling a transportation vehicle frame of claim 1, wherein the center sill body is secured to the rollover device by a clamping device.

9. The method of assembling a transportation vehicle frame of claim 8, wherein said equally welding the weld between the lower cover plate and the web and the weld between the upper cover plate and the web in the same welding area comprises: