CN214134449U - A chassis skeleton assembly welding frock for rail vehicle - Google Patents

Abstract

The utility model provides an underframe skeleton assembly welding tool for a rail vehicle, a row of first side beam propulsion mechanisms and a row of second side beam propulsion mechanisms are arranged in parallel, each first side beam propulsion mechanism and one second side beam propulsion mechanism correspond one to one, and a first end beam positioning and pressing mechanism, a first traction beam pressing mechanism, a first sleeper beam positioning and pressing mechanism, a supporting mechanism, a second sleeper beam positioning and pressing mechanism, a second traction beam pressing mechanism and a second end beam positioning and pressing mechanism are sequentially arranged above the ground between the first side beam propulsion mechanism and the second side beam propulsion mechanism from left to right, the underframe skeleton assembly welding tool for the rail vehicle realizes hydraulic jacking, adopts an electric control system to control, improves assembly precision, greatly increases production efficiency simultaneously, has excellent effect compared with the prior manual tensioning, the end bottom frame after assembly is prevented from moving back and forth to influence the overall size.

Description

A chassis skeleton assembly welding frock for rail vehicle

Technical Field

The utility model belongs to the rail vehicle field especially relates to an chassis skeleton assembly welding frock for rail vehicle.

Background

The underframe skeleton is an important component of a steel structure of a underframe of a railway passenger car body, the skeleton realizes the connection of an edge beam and cross beams through resistance spot welding, a middle beam is connected with the cross beams on two sides through welding, the skeleton is an important bearing structure of the underframe and is the basis of all equipment under the car, and the stainless steel car body underframe skeleton needs high precision and high strength size requirements and mainly comprises an end underframe, cross beams, a middle beam and edge beams, the welding deformation of the cross beams and the middle beam is large, a proper tool needs to be formulated to restrict welding stress, the subsequent adjustment and repair amount is reduced, and the standard of each size precision is guaranteed;

the disadvantages in the prior art are: the existing tool sleeper beam is positioned and compressed by using a chain pick to be manually compressed, and the looseness phenomenon exists along with the size adjustment, so that the overall size of a subsequent underframe is influenced; each type of vehicle is distributed differently by the cross beam, and spot welding of different types of vehicles requires to move the framework compensation points back and forth, so that the production efficiency is seriously influenced, the usability of equipment is reduced, and the occupied time of other tools is increased; the side beam device only plays a role in supporting and positioning the side beam, cannot tightly push the side beam, cannot meet the requirement of size control of the width size of the underframe in the whole production process, and greatly influences the structural precision; the center sill is a newly added structure, heat and welding deformation generated after the center sill and the cross beam are welded have large influence on the flatness of a follow-up framework, the position of a lifting hole of equipment under a vehicle and one side of a boundary beam in a spot welding mode, and the requirement of the newly added structure cannot be met by the existing tool.

Disclosure of Invention

In view of this, the utility model aims at providing an chassis skeleton assembly welding frock for rail vehicle to it is great with well roof beam welding deformation to solve the crossbeam, needs to formulate suitable frock and retrain welding stress, the unable tight boundary beam scheduling problem in top of curb girder device.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

an underframe framework assembling and welding tool for a railway vehicle comprises a first end beam positioning and pressing mechanism, a first traction beam pressing mechanism, a first sleeper beam positioning and pressing mechanism, a supporting mechanism, a second sleeper beam positioning and pressing mechanism, a second traction beam pressing mechanism, a second end beam positioning and pressing mechanism, a first side beam pushing mechanism and a second side beam pushing mechanism, a row of first side beam pushing mechanisms and a row of second side beam pushing mechanisms which are arranged in parallel, wherein each first side beam pushing mechanism corresponds to one second side beam pushing mechanism one by one, the first end beam positioning and pressing mechanism, the first traction beam pressing mechanism, the first sleeper beam positioning and pressing mechanism, the supporting mechanism, the second sleeper beam positioning and pressing mechanism, the second traction beam pressing mechanism and the second end beam positioning and pressing mechanism are sequentially arranged above the ground between the first side beam pushing mechanism and the second side beam pushing mechanism from left to right, the first sleeper beam positioning and compressing mechanism comprises a first workbench, a positioning and compressing unit and a first bolt, a first center hole for positioning the first bolt is formed in the top surface of the first workbench, the first center hole is of an elliptical hole structure, the first bolt is installed in the first center hole, the first sleeper beam positioning and compressing unit is installed at each of the left end and the right end of the top surface of the first workbench, the second sleeper beam positioning and compressing mechanism comprises a sixth workbench, a second sleeper beam positioning and compressing unit and a second bolt, a second center hole for positioning the second bolt is formed in the top surface of the sixth workbench, the second center hole is of a circular hole structure, the second bolt is installed in the second center hole, the second sleeper beam positioning and compressing unit is installed at each of the left end and the right end of the top surface of the sixth workbench, the first sleeper beam positioning and compressing unit, the first bolt structure, the second sleeper beam positioning and compressing unit and the second bolt structure are identical, the first sleeper beam positioning and compressing unit comprises a sleeper beam positioning and compressing assembly, The first vertical plate and the second vertical plate are sequentially arranged at the front end of the top surface of the first workbench, the first vertical plate is located in front of the second vertical plate, and a sleeper beam positioning and pressing assembly is respectively arranged at the left end and the right end between the first vertical plate and the second vertical plate.

Furthermore, the first side beam pushing mechanism and the second side beam pushing mechanism are identical in structure, the first side beam pushing mechanism comprises a second workbench, a side beam pressing unit and a side beam clamping unit, the side beam pressing units and the side beam clamping units are all parallelly and independently mounted on the top surface of the second workbench, the side beam pressing unit comprises a first bolt, a first connecting plate and a supporting rod, the first connecting plate is fixedly connected to the top surface of the second workbench through the supporting rod, and the first bolt is mounted at the front end of the first connecting plate.

Further, the side beam clamping unit comprises a second cylinder, a sliding block, a sliding rail and a first L-shaped plate, the second cylinder and the sliding rail are both mounted on the top surface of the second workbench, the second cylinder is located right behind the sliding rail, the bottom end of the first L-shaped plate is mounted above the sliding rail through the sliding block, the telescopic rod end of the second cylinder is fixedly connected to the back of the sliding block, each second cylinder is connected to a second electromagnetic valve, and the second electromagnetic valve is in signal connection with the controller.

Furthermore, the supporting mechanism comprises a third workbench, center sill supporting columns and center sill positioning units, wherein two rows of center sill supporting columns are respectively installed on two sides of the upper portion of the third workbench and at the rear end of the upper portion of the third workbench, the number of the center sill supporting columns in each row is a plurality, a plurality of center sill positioning units are installed between the two rows of center sill supporting columns, and the plurality of center sill positioning units are installed on the top surface of the third workbench.

Further, well roof beam positioning unit includes location support column, diaphragm, second L template, riser, second bolt and third bolt, and the diaphragm passes through location support column fixed connection to third workstation, and second L template, riser are installed respectively to diaphragm top surface both sides, and the second bolt is installed to the middle part of second L template, and the third bolt is installed to the top of second L template.

Furthermore, first end roof beam location hold-down mechanism and second end roof beam location hold-down mechanism structure are the same, first end roof beam location hold-down mechanism includes fourth workstation and end roof beam location compress tightly the unit, an end roof beam location compress tightly the unit is respectively installed at both ends around the fourth workstation top surface, the end roof beam location compresses tightly the unit and includes the fixed column, third L template and fourth bolt, the right-hand member of fixed column installation to fourth workstation top surface, the left end of third L template top surface is installed to the fourth bolt, and the fourth bolt bottom passes third L template top surface and is in directly over the fixed column.

Furthermore, the first traction beam pressing mechanism and the second traction beam pressing mechanism are the same in structure, the first traction beam pressing mechanism comprises a fifth workbench and a traction beam pressing unit, the front end and the rear end of the top surface of the fifth workbench are respectively provided with the traction beam pressing unit, the traction beam pressing unit comprises a second connecting plate and a lead screw, and the lead screw is fixedly connected to the top surface of the fifth workbench through the second connecting plate.

Further, the bolster location compresses tightly the subassembly and includes the rotor plate, the fixed axle, first cylinder and location hook, the preceding central point of rotor plate puts and is equipped with the through-hole that passes the fixed axle, the one end of fixed axle passes through-hole fixed connection to the back of first riser, other end fixed connection to the preceding of second riser, and the fixed axle is connected for rotating with the rotor plate, location hook is installed to rotor plate left end top, the flexible rod end of right-hand member below installation to first cylinder, first cylinder is in between first riser and the second riser and installs to first workstation top surface, first cylinder is connected to first solenoid valve, and first solenoid valve signal connection is to the controller.

Compared with the prior art, an chassis skeleton assembly welding frock for rail vehicle have following advantage:

(1) a chassis skeleton assembly welding frock for rail vehicle, realized the hydraulic pressure top tightly, adopt electrical system to control, improve the assembly precision, while greatly increased production efficiency, the sleeper beam location compresses tightly also for hydraulic control, it is taut to compare artifical before, the effect is splendid, avoid the end chassis of assembly completion to make a round trip to play, influence whole size, the end beam adopts first end roof beam location hold-down mechanism and second end roof beam location hold-down mechanism to fix a position and compress tightly, it is simple direct fixed with the whole length size of chassis skeleton, avoid personnel's maloperation production all kinds of problems, influence the holistic length cooperation of follow-up automobile body, satisfy the back process and use.

(2) A chassis skeleton assembly welding frock for rail vehicle, set up first side rail advancing mechanism and second side rail advancing mechanism location support in the great position of welding volume, make technology closing device can effectually exert the effort.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a top view of an underframe skeleton assembling and welding tool for a rail vehicle according to an embodiment of the present invention;

fig. 2 is a top view of a first bolster positioning and pressing mechanism according to an embodiment of the present invention;

fig. 3 is a top view of a second bolster positioning and pressing mechanism according to an embodiment of the present invention;

fig. 4 is a side view of a side beam pressing unit according to an embodiment of the present invention;

fig. 5 is a side view of a side beam clamping unit according to an embodiment of the present invention;

fig. 6 is a side view of a support mechanism according to an embodiment of the present invention;

fig. 7 is a top view of a first end beam positioning and pressing mechanism according to an embodiment of the present invention;

fig. 8 is a front view of a first end beam positioning and compressing mechanism according to an embodiment of the present invention;

fig. 9 is a top view of a first draft sill hold down according to an embodiment of the present invention;

fig. 10 is a schematic view of a sleeper beam positioning and pressing assembly according to an embodiment of the present invention;

fig. 11 is an enlarged top view of an underframe skeleton assembly welding fixture for a rail vehicle according to an embodiment of the present invention.

Description of reference numerals:

1-a first end beam positioning and pressing mechanism; 11-a fourth table; 12-end beam positioning and pressing unit; 121-fixed column; 122-a third L-shaped plate; 123-a fourth bolt; 2-a first draw beam hold down mechanism; 21-a fifth worktable; 22-a trailing beam compacting unit; 221-a second connecting plate; 222-a lead screw; 3-a first sleeper beam positioning and pressing mechanism; 31-a first stage; 32-a first sleeper beam positioning and pressing unit; 321-a sleeper beam positioning and compacting assembly; 3211-a rotating plate; 3212-fixed axis; 3213-a first cylinder; 3214-positioning hook; 4-a support mechanism; 41-a third working table; 42-centre sill support column; 43-a centre sill positioning unit; 431-positioning support columns; 432-a transverse plate; 433-a second L-shaped plate; 434-vertical plate; 435-a second bolt (435); 436-third bolt; 5-a second sleeper beam positioning and pressing mechanism; 51-a sixth stage; 52-a second bolster positioning and compacting unit; 6-a second draw beam hold-down mechanism; 7-a second end beam positioning and pressing mechanism; 8-a first side beam propulsion mechanism; 81-a second table; 82-side beam compression unit; 821-a first bolt; 822-a first connecting plate; 823-support bar; 83-side beam clamping unit; 831-second cylinder; 832-sliding block; 833-sliding rail; 834-a first L-shaped plate; 9-second side beam pushing mechanism.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used 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. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As shown in fig. 1 to 11, an underframe skeleton assembling and welding tool for a railway vehicle comprises: comprises a first end beam positioning and pressing mechanism 1, a first traction beam pressing mechanism 2, a first sleeper beam positioning and pressing mechanism 3, a supporting mechanism 4, a second sleeper beam positioning and pressing mechanism 5, a second traction beam pressing mechanism 6, a second end beam positioning and pressing mechanism 7, a first side beam pushing mechanism 8 and a second side beam pushing mechanism 9, a row of first side beam pushing mechanisms 8 and a row of second side beam pushing mechanisms 9 are arranged in parallel, each first side beam pushing mechanism 8 corresponds to one second side beam pushing mechanism 9 one by one, the first end beam positioning and pressing mechanism 1, the first traction beam pressing mechanism 2, the first sleeper beam positioning and pressing mechanism 3, the supporting mechanism 4, the second sleeper beam positioning and pressing mechanism 5, the second traction beam pressing mechanism 6 and the second end beam positioning and pressing mechanism 7 are sequentially arranged above the ground between the first side beam pushing mechanism 8 and the second side beam pushing mechanisms 9 from left to right, the first sleeper beam positioning and pressing mechanism 3 comprises a first workbench 31, a positioning and pressing unit 32 and a first bolt, a first center hole for positioning the first bolt is formed in the top surface of the first workbench 31, the first center hole is of an elliptical hole structure, the first bolt is installed in the first center hole, a first sleeper beam positioning and pressing unit 32 is installed at each of the left end and the right end of the top surface of the first workbench 31, the second sleeper beam positioning and pressing mechanism 5 comprises a sixth workbench 51, a second sleeper beam positioning and pressing unit 52 and a second bolt, a second center hole for positioning the second bolt is formed in the top surface of the sixth workbench 51, the second center hole is of a circular hole structure, the second bolt is installed in the second center hole, a second sleeper beam positioning and pressing unit 52 is installed at each of the left end and the right end of the top surface of the sixth workbench 51, the first sleeper beam positioning and pressing unit 32, the first bolt structure and the second sleeper beam positioning and pressing unit 52, The second bolts have the same structure (the working principle of the first sleeper beam positioning and compressing unit 32 is the same as that of the second sleeper beam positioning and compressing unit 52, and therefore only the first sleeper beam positioning and compressing unit 32 is described later, and the second sleeper beam positioning and compressing unit 52 will not be described any more), the first sleeper beam positioning and compressing unit 32 includes a sleeper beam positioning and compressing assembly 321, a first vertical plate and a second vertical plate, the first vertical plate and the second vertical plate are sequentially installed to the front end of the top surface of the first workbench 31, the first vertical plate is located in front of the second vertical plate, and one sleeper beam positioning and compressing assembly 321 is respectively installed at the left end and the right end between the first vertical plate and the second vertical plate;

the sleeper beam positioning and pressing assembly 321 comprises a rotating plate 3211, a fixed shaft 3212, a first cylinder 3213 and a positioning hook 3214, a through hole passing through the fixed shaft 3212 is formed in the center of the front of the rotating plate 3211, one end of the fixed shaft 3212 passes through the through hole and is fixedly connected to the rear of the first vertical plate, the other end is fixedly connected to the front of the second vertical plate, the fixed shaft 3212 is rotatably connected with the rotating plate 3211, a positioning hook 3214 is mounted above the left end of the rotating plate (the positioning hook 3214 ensures the firm assembly of the end chassis and prevents the assembled end chassis from moving back and forth, which affects the overall size), a telescopic rod end of a first cylinder 3213 is mounted below the right end, the first cylinder 3213 is located between the first vertical plate and the second vertical plate and mounted on the top surface of the first workbench 31, the first cylinder 3213 is connected to the first electromagnetic valve, and the first electromagnetic valve is in signal connection with a controller, the controller is a PLC, and the model of the controller is Siemens S7-200 smart.

As shown in fig. 4-5 and fig. 11, the first side beam pushing mechanism 8 and the second side beam pushing mechanism 9 have the same structure, the first side beam pushing mechanism 8 and the second side beam pushing mechanism 9 have the same working principle, only the first side beam propulsion mechanism 8 will be described later, and the second side beam propulsion mechanism 9 will not be described in detail, the mechanism 8 for pushing the first side beam comprises a second workbench 81, a side beam pressing unit 82 and a side beam clamping unit 83, wherein the side beam pressing units 82 and the side beam clamping units 83 are independently installed on the top surface of the second workbench 81 in parallel, the side beam pressing unit 82 comprises a first bolt 821, a first connecting plate 822 and a support rod 823, the first connecting plate 822 is fixedly connected to the top surface of the second workbench 81 through the support rod 823, a first bolt 821 is installed at the front end of the first connecting plate 822, and the first bolt 821 is used for pressing the side beam;

the side beam clamping unit 83 comprises a second air cylinder 831, a sliding block 832, a sliding rail 833 and a first L-shaped plate 834, wherein the second air cylinder 831 and the sliding rail 833 are mounted on the top surface of the second workbench 81, the second air cylinder 831 is located right behind the sliding rail 833, the bottom end of the first L-shaped plate 834 is mounted above the sliding rail 833 through the sliding block 832, the telescopic rod end of the second air cylinder 831 is fixedly connected to the rear face of the sliding block 832, each second air cylinder 831 is connected to a second electromagnetic valve, the second electromagnetic valves are in signal connection with a controller, the first electromagnetic valves and the second electromagnetic valves are ZC51-15HB, and the second air cylinder 831 is used for pushing the sliding block 832.

As shown in fig. 6, the supporting mechanism 4 includes a third workbench 41, center sill supporting columns 42 and center sill positioning units 43, two rows of center sill supporting columns 42 are respectively installed at two sides and the rear end above the third workbench 41, the number of the center sill supporting columns 42 in each row is several, a plurality of center sill positioning units 43 are installed between two rows of center sill supporting columns 42, the plurality of center sill positioning units 43 are installed on the top surface of the third workbench 41, and the center sill supporting columns 42 are used for supporting the center sill;

the center sill positioning unit 43 comprises a positioning support column 431, a transverse plate 432, a second L-shaped plate 433, a vertical plate 434, a second bolt 435 and a third bolt 436, the transverse plate 432 is fixedly connected to the third workbench 41 through the positioning support column 431, the second L-shaped plate 433 and the vertical plate 434 are respectively installed on two sides of the top surface of the transverse plate 432, the second bolt 435 is installed in the middle of the second L-shaped plate 433, the third bolt 436 is installed above the second L-shaped plate 433, the second bolt 435 is used for clamping the center sill, and the third bolt 436 is used for compressing the center sill.

As shown in fig. 7-8, the first end beam positioning and compressing mechanism 1 and the second end beam positioning and compressing mechanism 7 have the same structure, and the first end beam positioning and compressing mechanism 1 and the second end beam positioning and compressing mechanism 7 also have the same working principle, so only the first end beam positioning and compressing mechanism 1 is described later, and the second end beam positioning and compressing mechanism 7 will not be described again, the first end beam positioning and compressing mechanism 1 includes a fourth worktable 11 and an end beam positioning and compressing unit 12, an end beam positioning and compressing unit 12 is respectively installed at the front end and the rear end of the top surface of the fourth worktable 11, the end beam positioning and compressing unit 12 includes a fixed column 121, a third L-shaped plate 122 and a fourth bolt 123, the fixed column 121 is installed at the right end of the top surface of the fourth worktable 11, the third L-shaped plate 122 is installed at the left end of the top surface of the fourth worktable 11, the fourth bolt 123 is installed at the left end of the top surface of the third L-shaped plate 122, and the bottom end of the fourth bolt 123 passes through the top surface of the third L-shaped plate 122 and is positioned right above the fixing column 121, and the fourth bolt 123 is used for pressing the end beam.

As shown in fig. 9, the first traction beam pressing mechanism 2 and the second traction beam pressing mechanism 6 have the same structure and the same working principle, so only the first traction beam pressing mechanism 2 is described later, the second traction beam pressing mechanism 6 will not be described again, the first traction beam pressing mechanism 2 includes a fifth workbench 21 and a traction beam pressing unit 22, the front end and the rear end of the top surface of the fifth workbench 21 are respectively provided with one traction beam pressing unit 22, the traction beam pressing unit 22 includes a second connecting plate 221 and a lead screw 222, the lead screw 222 is fixedly connected to the top surface of the fifth workbench 21 through the second connecting plate 221, and the lead screw 222 is used for clamping the traction beam.

The utility model discloses the theory of operation: the operator operates the controller to make the controller respectively control the first electromagnetic valve and the second electromagnetic valve to work simultaneously, the controller makes the plurality of second cylinders 831 work simultaneously through the second electromagnetic valve, the telescopic rod end of the second cylinders 831 pushes the sliding block 833 to move towards the side beam direction, the sliding block 833 drives the first L-shaped plate 834 to move towards the side beam direction, so that the first L-shaped plate 834 clamps the side beam, because a side beam pushing mechanism 8 and a second side beam pushing mechanism 9 have the same structure, the working principle of the second side beam pushing mechanism 9 is not repeated here, the controller makes the first cylinder 3213 work through the first electromagnetic valve, the first cylinder 3213 drives one end of the rotating plate 3211 to move downwards, because the fixed shaft 3212 is rotatably connected with the rotating plate 3211, the other end of the rotating plate 3211 moves upwards, and drives the positioning hook 3214 to move upwards, so that the positioning hook 3214 clamps the sleeper beam to prevent the sleeper beam from moving, at this time, the electric operation is completed;

starting manual operation: and the worker screws the first bolt 821 to enable the first bolt 821 to press the side beam, screws the second bolt 435 and the third bolt 436, enables the second bolt 435 to clamp the middle beam, enables the third bolt 436 to press the middle beam, screws the fourth bolt 123, enables the fourth bolt 123 to press the end beam and adjusts the screw rod 222, enables the screw rod 222 to clamp the traction beam, enables the worker to install the second bolt in the second center hole, fixes and positions the sleeper beam at the second center hole site, enables the worker to install the first bolt in the first center hole site, movably positions the sleeper beam at the first center hole site, facilitates welding work, supports the middle beam through the middle beam support column 42, and achieves the purpose of fixing the underframe stably.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. The utility model provides an chassis skeleton assembly welding frock for rail vehicle which characterized in that: the device comprises a first end beam positioning and pressing mechanism (1), a first traction beam pressing mechanism (2), a first sleeper beam positioning and pressing mechanism (3), a supporting mechanism (4), a second sleeper beam positioning and pressing mechanism (5), a second traction beam pressing mechanism (6), a second end beam positioning and pressing mechanism (7), a first side beam pushing mechanism (8) and a second side beam pushing mechanism (9), a row of first side beam pushing mechanisms (8) and a row of second side beam pushing mechanisms (9) are arranged in parallel, each first side beam pushing mechanism (8) corresponds to one second side beam pushing mechanism (9) one by one, the first end beam positioning and pressing mechanism (1), the first traction beam pressing mechanism (2), the first sleeper beam positioning and pressing mechanism (3) are sequentially arranged above the ground between the first side beam pushing mechanism (8) and the second side beam pushing mechanism (9) from left to right, The supporting mechanism (4), the second sleeper beam positioning and compressing mechanism (5), the second traction beam compressing mechanism (6) and the second end beam positioning and compressing mechanism (7), the first sleeper beam positioning and compressing mechanism (3) comprises a first workbench (31), a positioning and compressing unit (32) and a first bolt, a first central hole for positioning the first bolt is formed in the top surface of the first workbench (31), the first central hole is of an elliptical hole structure, the first bolt is installed in the first central hole, the first sleeper beam positioning and compressing unit (32) is respectively installed at the left end and the right end of the top surface of the first workbench (31), the second sleeper beam positioning and compressing mechanism (5) comprises a sixth workbench (51), a second sleeper beam positioning and compressing unit (52) and a second bolt, a second central hole for positioning the second bolt is formed in the top surface of the sixth workbench (51), the second central hole is of a circular hole structure, the second bolt is installed in the second central hole, the second sleeper beam location compresses tightly unit (52) is respectively installed at both ends about sixth workstation (51) top surface, first sleeper beam location compresses tightly unit (32), first bolt structure and second sleeper beam location compress tightly unit (52), second bolt structure is all the same, first sleeper beam location compresses tightly unit (32) including sleeper beam location compress tightly subassembly (321), first riser and second riser, first riser, the front end to first workstation (31) top surface is installed in proper order to the second riser, and first riser is located the front of second riser, left end between first riser and the second riser, sleeper beam location compress tightly subassembly (321) is respectively installed to the right-hand member.

2. The assembly welding tool for the underframe frameworks of the railway vehicle as claimed in claim 1, wherein the assembly welding tool comprises: the structure of the first side beam pushing mechanism (8) is the same as that of the second side beam pushing mechanism (9), the first side beam pushing mechanism (8) comprises a second workbench (81), a side beam pressing unit (82) and a side beam clamping unit (83), a plurality of side beam pressing units (82) and a plurality of side beam clamping units (83) are parallelly and independently mounted on the top surface of the second workbench (81), each side beam pressing unit (82) comprises a first bolt (821), a first connecting plate (822) and a supporting rod (823), the first connecting plate (822) is fixedly connected to the top surface of the second workbench (81) through the supporting rod (823), and the first bolt (821) is mounted at the front end of the first connecting plate (822).

3. The assembly welding tool for the underframe frameworks of the railway vehicle as claimed in claim 2, wherein the assembly welding tool comprises: the side beam clamping unit (83) comprises a second air cylinder (831), a sliding block (832), a sliding rail (833) and a first L-shaped plate (834), the second air cylinder (831) and the sliding rail (833) are mounted on the top surface of the second workbench (81), the second air cylinder (831) is located right behind the sliding rail (833), the bottom end of the first L-shaped plate (834) is mounted above the sliding rail (833) through the sliding block (832), the telescopic rod end of the second air cylinder (831) is fixedly connected to the rear face of the sliding block (832), each second air cylinder (831) is connected to a second electromagnetic valve, and the second electromagnetic valve is in signal connection with the controller.

4. The assembly welding tool for the underframe frameworks of the railway vehicle as claimed in claim 1, wherein the assembly welding tool comprises: the supporting mechanism (4) comprises a third workbench (41), a middle beam supporting column (42) and a middle beam positioning unit (43), wherein a row of middle beam supporting columns (42) are respectively installed on two sides of the upper portion of the third workbench (41) and at the rear end of the upper portion of the third workbench, the number of the middle beam supporting columns (42) in each row is a plurality, a plurality of middle beam positioning units (43) are installed between two rows of middle beam supporting columns (42), and the top surfaces of the third workbench (41) are installed by the plurality of middle beam positioning units (43).

5. The assembly welding tool for the underframe frameworks of the railway vehicle as claimed in claim 4, wherein the assembly welding tool comprises: center sill positioning unit (43) are including location support column (431), diaphragm (432), second L template (433), riser (434), second bolt (435) and third bolt (436), diaphragm (432) pass through location support column (431) fixed connection to third workstation (41), second L template (433), riser (434) are installed respectively to diaphragm (432) top surface both sides, the middle part of second L template (433) is installed to second bolt (435), third bolt (436) are installed to the top of second L template (433).

6. The assembly welding tool for the underframe frameworks of the railway vehicle as claimed in claim 1, wherein the assembly welding tool comprises: the first end beam positioning and pressing mechanism (1) and the second end beam positioning and pressing mechanism (7) are identical in structure, the first end beam positioning and pressing mechanism (1) comprises a fourth workbench (11) and an end beam positioning and pressing unit (12), the front end and the rear end of the top surface of the fourth workbench (11) are respectively provided with the end beam positioning and pressing unit (12), the end beam positioning and pressing unit (12) comprises a fixing column (121), a third L-shaped plate (122) and a fourth bolt (123), the fixing column (121) is installed at the right end of the top surface of the fourth workbench (11), the third L-shaped plate (122) is installed at the left end of the top surface of the fourth workbench (11), the fourth bolt (123) is installed at the left end of the top surface of the third L-shaped plate (122), and the bottom end of the fourth bolt (123) penetrates through the top surface of the third L-shaped plate (122) and is located right above the fixing column (121).

7. The assembly welding tool for the underframe frameworks of the railway vehicle as claimed in claim 1, wherein the assembly welding tool comprises: the first traction beam pressing mechanism (2) and the second traction beam pressing mechanism (6) are identical in structure, the first traction beam pressing mechanism (2) comprises a fifth workbench (21) and a traction beam pressing unit (22), the front end and the rear end of the top surface of the fifth workbench (21) are respectively provided with the traction beam pressing unit (22), the traction beam pressing unit (22) comprises a second connecting plate (221) and a lead screw (222), and the lead screw (222) is fixedly connected to the top surface of the fifth workbench (21) through the second connecting plate (221).

8. The assembly welding tool for the underframe frameworks of the railway vehicle as claimed in claim 1, wherein the assembly welding tool comprises: the utility model discloses a sleeper beam location compresses tightly subassembly (321) includes rotor plate (3211), fixed axle (3212), first cylinder (3213) and location hook (3214), the preceding central point of rotor plate (3211) puts and is equipped with the through-hole that passes fixed axle (3212), the one end of fixed axle (3212) passes through the rear of through-hole fixed connection to first riser, other end fixed connection is to the preceding of second riser, and fixed axle (3212) and rotor plate (3211) are the rotation connection, rotor plate left end top installation location hook (3214), the flexible rod end of right-hand member below installation to first cylinder (3213), first cylinder (3213) are in between first riser and the second riser and install to first workstation (31) top surface, first cylinder (3213) are connected to first solenoid valve, and first solenoid valve signal connection is to the controller.

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