WO2021068498A1

WO2021068498A1 - Railway vehicle sleeper beam, underframe and underframe welding method

Info

Publication number: WO2021068498A1
Application number: PCT/CN2020/088909
Authority: WO
Inventors: 李丽; 苏柯; 刘永强; 钟磊; 王国军; 张长庚
Original assignee: 中车株洲电力机车有限公司
Priority date: 2019-10-08
Filing date: 2020-05-07
Publication date: 2021-04-15
Also published as: CN110588693B; CN110588693A

Abstract

A railway vehicle sleeper beam, comprising a sleeper beam main body, end portion cover plates (302), and floor connecting profiles (307) welded on two longitudinal sides of the sleeper beam main body; the outer sides of the floor connecting profiles at the two longitudinal ends of the sleeper beam main body are respectively welded to floors (305, 306), and the top surface of the sleeper beam main body is flush with the top surfaces of the floors; process notches (q2) are provided at two sides of the top surface of the sleeper beam main body; a rib plate at the inner side of the sleeper beam main body and the inner side of a side beam of an underframe are welded by means of a vertical welding seam therebetween, the end portion cover plates cover the process notches, the peripheries of the end portion cover plates are welded to the sleeper beam main body, the top surface of the sleeper beam main body and the side beam of the underframe are welded by means of a longitudinal welding seam therebetween, a rib plate at the outer side of a sleeper beam of the sleeper beam main body and the side beam of the underframe are welded by means of a vertical welding seam therebetween, and the bottom surface of the sleeper beam main body and the side beam of the underframe are welded by means of a longitudinal welding seam therebetween. Further disclosed are an underframe and an underframe welding method.

Description

Method for welding rail vehicle bolster, underframe and underframe

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on October 08, 2019, the application number is 201910949278.6, and the invention title is "A method for welding rail vehicle bolsters, underframes and underframes", and its entire contents Incorporated in this application by reference.

Technical field

The invention relates to the technical field of rail vehicle underframes, in particular to a welding method for rail vehicle bolsters, underframes and underframes made of aluminum composite materials.

Background technique

The bolster is the main force-bearing component of the underframe structure of the car body. It connects the bogie and transmits the longitudinal compression force and traction force. It is a key structure for power transmission to realize the safe driving of the vehicle.

At present, when the bolster is connected to the floor of the underframe, the upper plane of the bolster is directly contacted and installed with the lower surface of the full-length floor. The connection between the corbel and the side beam of the underframe is realized through the vertical welds on the inner plane of the corbel and the side beam of the underframe, and the welds along the longitudinal connection of the car body are connected by the longitudinal welding seam of the lower plane of the corbel and the side beam of the underframe. , The lower plane of the corbel and the longitudinal weld of the side beam of the underframe can only be partially connected. With a long floor structure, the welds between the corbel and the underframe floor are concentrated on one side, which is easy to cause welding deformation. In addition, the process gap is usually set on the lower plane of the bolster. After the cover plate and the bolster are welded, the welds on the lower plane need to be flattened and the flatness requirements of the plane need to be improved. The frame is machined as a whole, which takes up a long time for a large platform of the underframe and consumes more manpower.

Therefore, how to improve the connection strength between the corbel and the underframe, reduce the welding deformation of the key structure of the corbel, and avoid the overall processing of the corbel lower plane on a large platform, which takes up a lot of man-hours is an urgent problem for those skilled in the art. technical problem.

Summary of the invention

In view of this, the first object of the present invention is to provide a rail car bolster, the process gap is set on the top surface of the rail car bolster, which can avoid the welding of the cover plate and the rail car bolster, due to the need to weld the seam The processing of flatness requires the overall machining of the car body underframe to take up a large work station; at the same time, it helps to control the flatness of the bottom surface of the rail vehicle corbel.

The second object of the present invention is to provide a chassis.

The third object of the present invention is to provide a method for welding the underframe.

In order to achieve the above-mentioned first objective, the present invention provides the following solutions:

A rail vehicle bolster, comprising a bolster body, an end cover, and floor connecting profiles welded on both longitudinal sides of the bolster body;

The longitudinal welds at both ends of the top surface of the corbel body and the longitudinal welds at both ends of the bottom surface of the corbel body are respectively longitudinally welded to the side beams of the underframe;

The main body of the corbel and the side beam of the underframe are welded to the inner side of the side beam of the underframe through the vertical ribs on the main body of the corbel in the vertical direction;

The inner side of the floor connecting profile is welded to the corbel main body, the outer side of the floor connecting profile is welded to the underframe floor, and the top surface of the corbel main body is flush with the top surface of the underframe floor;

The two ends of the top surface of the corbel main body are provided with process gaps, and the end cover plates are sealed on the process gaps.

In a specific embodiment, the corbel body includes a first side corbel, a second side corbel and a middle corbel;

The first side bolster and the second side bolster are respectively welded on both longitudinal sides of the middle bolster.

In another specific embodiment, the rail vehicle bolster further includes an anti-rolling structure;

The anti-rolling structure includes an anti-rolling mounting seat and a positioning threaded block;

An installation notch is provided on the bottom surface of the first side bolster, the anti-rolling mounting seat is welded in the mounting notch, and the top surface of the anti-rolling mounting seat is flat with the bottom surface of the bolster body Qi

The positioning threaded block can be slidably inserted into the anti-rolling mounting seat, the positioning threaded block is provided with a threaded hole, and the anti-rolling mounting seat is provided with a thread coaxial with the threaded hole. Through holes, bolts can pass through the through holes to connect with the threaded holes, and the anti-side-rolling torsion rod mounting seat is installed on the anti-side-rolling mounting seat.

In another specific embodiment, the positioning threaded block is a T-shaped block, and the head of the T-shaped block is clamped on the top surface of the anti-rolling mounting seat.

In another specific embodiment, the anti-rolling mounting seat is a square box-shaped hollow structure, and the circumferential direction of the anti-rolling mounting seat is provided with a first welding groove inclined inward, and the first Welding grooves are welded to the installation notches and the outer vertical ribs of the main body of the corbel;

A second welding groove is provided in the circumferential direction of the process gap at both ends of the corbel main body for welding with the end cover plate. In another specific embodiment, the bottom surface of the corbel body is flush with the bottom surface of the side beam of the underframe.

The various embodiments according to the present invention can be combined arbitrarily as required, and the embodiments obtained after these combinations are also within the scope of the present invention and are part of the specific embodiments of the present invention.

Without being limited to any theory, it can be seen from the above disclosure that the process gap is provided on the top surface of the main body of the bolster, which prevents the process gap from being set on the bottom surface of the bolster of the rail vehicle to block the bolster. Concentration of welds caused by gaps and poor flatness of the plane. In addition, the underframe floor is welded on both sides of the main body of the bolster by floor connecting profiles, and the top surface of the main body of the bolster is flush with the top surface of the underframe floor. The welding seam of the rail vehicle bolster and the underframe floor is concentrated on one side, which reduces the welding deformation and at the same time improves the connection strength of the rail vehicle bolster. The invention can avoid the traditional process gap being set on the bottom surface of the rail car bolster. After the cover plate and the rail car bolster are welded, the car body underframe needs to be machined as a whole, which takes up a large platform due to the need to flatten the welding seam. Bit work hours consume more manpower.

In order to achieve the above-mentioned second objective, the present invention provides the following solutions:

An underframe includes the rail vehicle bolster as described in any one of the above.

Since the underframe disclosed in the present invention includes any one of the above-mentioned rail vehicle bolsters, the beneficial effects of the above-mentioned rail vehicle bolsters are all included in the underframe disclosed in the present invention.

In order to achieve the above-mentioned third objective, the present invention provides the following solutions:

A method for welding an underframe includes the following steps:

Step A: Fabricate the corbel main body, and open process gaps at both ends of the top surface of the corbel main body;

Step B: The corbel main body, the traction beam and the buffer beam are welded together to form an end structure, that is, the end structure corbel;

Step C: Weld the vertical weld between the inner side rib of the end structure bolster and the inner side of the side beam of the underframe through the process gap;

Step D: Cover the end cover plate on the process gap, and weld the periphery of the end cover plate and the weld seam of the end structural bolster;

Step E: Weld the longitudinal weld between the top surface of the end structure corbel and the side beam of the underframe;

Step F: Turn the bottom frame over, and weld the vertical weld between the corbel outer plate of the end structure corbel and the side beam of the bottom frame;

Step G: Weld the longitudinal weld between the bottom surface of the end structure corbel and the side beam of the underframe;

Step H: Place the floor connecting profile and the floor profile in sequence on both sides of the end structure bolster, and weld the floor connecting profile to both sides of the main body of the bolster, and then weld it with the floor profile, and the The top surface of the end structure corbel is flush with the top surface of the floor.

In a specific embodiment, the step A specifically includes the following steps:

Step A1: The first side bolster and the second side bolster are respectively placed on both longitudinal sides of the middle bolster, and the welds and the welds between the first side bolster and the middle bolster are respectively welded through butt joints. The weld between the second side bolster and the middle bolster;

Step A2: A process notch matching with the end cover is machined at the middle position of the top surface of the corbel body along the longitudinal direction of the corbel body.

In another specific embodiment, the bottom surface of the first side bolster in the step A1 is provided with installation notches along the two lateral ends of the vehicle body;

The step A1 and the step A2 further include a step I: the top surface of the anti-side-rolling mounting seat and the bottom surface of the corbel body are installed flush in the installation notch, and welded to the installation notch Inside;

Between the step A2 and the step B or between the step G and the step H, further includes a step J: installing and fixing the bottom surface of the corbel body or the bottom surface of the end structure corbel upwards, Machining the bottom surface of the bolster body to remove the reserved thickness, and partially adjust it to ensure that the bottom surface of the bolster body meets the flatness requirements required for installing the bogie air spring;

The bottom frame welding method further includes step K: inserting the positioning threaded block into the anti-rolling mounting seat, and the threaded hole on the positioning threaded block is tapped and matched with the threaded hole on the anti-rolling mounting seat ；

When the step J is located between the step A2 and the step B, the step K is located between the step J and the step C;

When the step J is located between the step G and the step H, the step K is located between the step J and the step H.

Description of the drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

Figure 1 is a schematic diagram of the structure of the first side bolster provided by the present invention;

Figure 2 is a schematic diagram of the structure of the corbel body provided by the present invention;

Figure 3 is a schematic diagram of the external structure of the anti-rolling mounting seat provided by the present invention;

Figure 4 is a schematic diagram of the internal structure of the anti-rolling mounting seat provided by the present invention;

Figure 5 is an exploded schematic diagram of the anti-rolling structure provided by the present invention;

Figure 6 is a schematic structural diagram of the anti-rolling mounting structure provided by the present invention;

Figure 7 is a schematic diagram of the top surface structure of the rail vehicle corbel provided by the present invention;

FIG. 8 is a schematic diagram of the bottom surface structure of the rail vehicle bolster provided by the present invention;

FIG. 9 is a schematic diagram of the structure of the front side of the rail vehicle bolster installed on the bottom frame provided by the present invention;

Figure 10 is a structural schematic diagram of the rail vehicle bolster installed on the bottom surface of the bottom frame provided by the present invention;

FIG. 11 is a schematic sectional view of the structure of FIG. 10;

Figure 12 is a schematic diagram of the installation structure of the anti-rolling structure provided by the present invention;

FIG. 13 is a schematic diagram of a partial enlarged structure of the underframe provided by the present invention.

Among them, in Figure 1-13:

The first side bolster 101, the second side bolster 102, the middle bolster 103, the anti-rolling structure 104, the anti-rolling mounting seat 201, the positioning thread block 202, the first mounting side 2011, the second mounting side 2012, the first Three installation sides 2013, fourth installation side 2014, left underframe side beam 301, end cover 302, right underframe side beam 303, end structural corbel 304, short floor 305, long floor 306, floor connection Profile 307, anti-side-rolling torsion rod mounting seat 401, and bolts 402.

Detailed ways

In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with accompanying drawings 1-13 and specific embodiments.

Example one

The present invention discloses a rail vehicle bolster, wherein the rail vehicle bolster includes a bolster body, an end cover 302 and a floor connecting profile 307.

The floor connecting profile 307 is welded to the longitudinal sides of the main body of the corbel, and the outer side of the floor connecting profile 307 is welded to the short floor 305 and the long floor 306 of the underframe respectively. The top surface of the main body of the bolster is flush with the top surface of the underframe floor. The raised floor adopts a non-full-length floor structure, that is, the floor is disconnected at the bolster of the rail vehicle.

That is, the floor connecting profile is welded to the main body of the bolster inward, and welded to the floor of the underframe outward. They are connected in sequence in the order of the underframe floor, the floor connecting profile, and the main body of the bolster.

The top surface of the main body of the corbel is provided with a process gap at both lateral ends, and the end cover is sealed on the process gap. Specifically, the process gap is opened in the middle part of the lateral ends of the top surface of the corbel main body.

The process gap is used to weld the inner vertical ribs of the main body of the corbel with the vertical welds on the inner side of the side beam of the underframe, and then the end cover is used to seal the process gap.

The longitudinal welding seam at the end of the top surface of the bolster body and the longitudinal welding seam at the end of the bottom surface of the bolster body are respectively longitudinally welded to the side beam of the underframe. The main body of the corbel and the side beam of the underframe are welded to the inner side of the side beam of the underframe through the vertical ribs on the main body of the corbel in the vertical direction.

In the present invention, the entire underframe floor is disconnected at the corbel of the rail vehicle, and is arranged in blocks. The longitudinal and vertical welds between the main body of the corbel and the side beam of the underframe can be welded to, which greatly enhances the corbel of the rail vehicle. The connection strength of this critical load-bearing structure.

In the rail vehicle bolster disclosed in the present invention, the process gap is provided on the top surface of the main body of the bolster, which avoids the process gap being arranged on the lower plane of the rail vehicle bolster, and blocking the gap leads to poor flatness of the lower plane and difficult to control deformation. The problem. In addition, the underframe floor is welded on both sides of the main body of the bolster, and the top surface of the main body of the bolster is flush with the top surface of the underframe floor, that is, the underframe floor is arranged in blocks instead of a full-length structure, which avoids rail vehicle sleepers. The welding seams between the beam and the underframe floor are concentrated on one side, reducing welding distortion. The invention can avoid the traditional process gap being set on the bottom surface of the rail car bolster. After the cover plate and the rail car bolster are welded, the car body underframe needs to be machined as a whole, which takes up a large platform due to the need to flatten the welding seam. Bit work hours consume more manpower.

Example two

In the second embodiment provided by the present invention, the structure of the rail vehicle bolster in this embodiment is similar to that of the rail vehicle bolster in Embodiment 1. The similarities are not repeated here, and only the differences are introduced.

In this embodiment, the present invention discloses that the main body of the bolster includes a first side bolster 101, a second side bolster 102, and a middle bolster 103. The first side bolster 101 and the second side bolster 102 are welded in the middle, respectively. The longitudinal sides of the corbel 103.

Furthermore, the present invention discloses that the rail vehicle bolster further includes an anti-rolling structure 104, and the anti-rolling structure 104 includes an anti-rolling mounting seat 201 and a positioning thread block 202.

An installation notch is formed on the bottom surface of the first side bolster 101, the anti-rolling mounting seat 201 is welded in the mounting notch, and the top surface of the anti-rolling mounting seat 201 is flush with the bottom surface of the body of the bolster.

The positioning threaded block 202 can be slidably inserted into the anti-rolling mounting seat 201. The positioning threaded block 202 is provided with a threaded hole, and the anti-rolling mounting seat 201 is provided with a through hole coaxial with the threaded hole. The bolt can pass through Through the through hole and the threaded hole on the positioning threaded block 202, the bolt and the threaded hole are connected, and then the anti-rolling torsion rod mounting seat 401 is installed on the anti-rolling mounting seat 201.

Further, the present invention discloses that the positioning screw block 202 is a T-shaped block, and the head of the T-shaped block is clamped on the top surface of the anti-rolling mounting seat 201.

Further, the present invention discloses that the anti-rolling mounting seat 201 is a hollow structure, and the anti-rolling mounting seat 201 is provided with a first welding groove inclined inward in the circumferential direction, and the first welding groove is welded to the mounting notch and the pillow The outer vertical ribs of the beam main body are provided with second welding grooves in the circumferential direction of the process gaps at both ends of the top surface of the corbel main body for welding with the end cover 302. The anti-rolling mounting seat 201 is first welded to the outside of the main structure of the corbel. When the bottom surface of the rail vehicle bolster is machined with the reserved amount of machining, the top surface of the anti-rolling mounting seat 201 is processed to a certain thickness at the same time. After the processing is completed, the positioning thread block 202 is installed on the anti-rolling mounting seat 201 . The positioning screw block 202 is installed in the anti-rolling mounting seat 201 through a waist-shaped hole provided on the upper surface of the anti-rolling mounting seat 201. The threaded hole on the positioning thread block 202 is processed after the positioning thread block 202 is installed inside the anti-rolling mounting seat 201. When the vehicle is running, if the positioning screw block 202 is damaged, it can be easily disassembled and replaced.

As shown in Figure 3, the anti-rolling mounting seat 201 has a square box structure. Among them, m1 is the front surface of the anti-rolling mounting seat 201. The plane is preliminarily set with a certain number of circular through holes according to the installation requirements for connecting with the anti-rolling torsion rod mounting seat 401; m2 is the anti-rolling mounting seat 201 There are a number of waist-shaped holes on the top surface. The mounting edges of the anti-rolling mounting seat 201 are respectively named: the first mounting edge 2011, the second mounting edge 2012, the third mounting edge 2013 and the fourth mounting edge 2014, all of which are processed with welding grooves. The upper part of the positioning screw block 202 is provided with a step m3, which is larger than the width of the lower bolt mounting surface m4. A threaded hole is designed on the lower bolt mounting surface m4, and the hole is arranged coaxially with the hole on the front surface m1 of the anti-rolling mounting seat 201 when the positioning threaded block 202 is mounted to the anti-rolling mounting seat 201. The length H1 of the lower bolt mounting surface m4 of the positioning screw block 202 is adapted to the length H2 of the inner height H2 of the anti-rolling mounting seat 201.

Specifically, the profile cross-sections of the first side bolster 101 and the second side bolster 102 are the same. The difference is that the first side bolster 101 is provided with installation notches on both sides along the longitudinal direction of the profile. Specifically, the installation notches are square Notch, the installation notch is matched with the external dimension of the anti-rolling mounting seat 201. The first side bolster 101, the second side bolster 102 and the middle bolster 103 are all an integrated aluminum alloy extruded profile structure composed of an upper plate, a lower plate and a plurality of reinforcing rib plates located between the upper and lower plates. The first side bolster 101 and the second side bolster 102 are provided with welding backing plates, which are simple to weld and the quality of the weld seam is easy to control. The lower plates of the first side bolster 101, the second side bolster 102 and the middle bolster 103 are all thicker than the upper plate. The structure of the first side bolster 101 is shown in FIG. 1, S1 is the upper plate plane of the first side bolster 101, S2 is the lower plate plane of the first side bolster 101, and S3 is the track of the first side bolster 101 The vertical ribs on the inner side of the vehicle bolster, S4 is the vertical ribs on the outer side of the rail vehicle bolster of the first side bolster 101, and the rib structure in the middle can be flexibly designed according to actual rigidity requirements. Square notches q1 (ie, installation notches) are processed on both ends of S2, and the thickness of the S2 plate is thicker than that of the S1 plate.

The first side bolster 101, the middle bolster 103, and the second side bolster 102 are assembled in the manner shown in FIG. 2. The three profiles are respectively butt welded by the butt joint W1 on the upper surface and the butt joint W2 on the lower surface. Form the main body of the corbel. The first side bolster 101 near the outer side of the car body is pre-processed along its lengthwise ends with square notches q1 matching the anti-rolling mounting seat 201; the profile is in accordance with the first side bolster 101, the middle bolster 103, The arrangement sequence of the second side bolster 102 is fixedly welded together to form the main structure of the bolster.

Further, the present invention discloses that the bottom surface of the main body of the corbel is flush with the bottom surface of the side beam of the underframe after machining a certain reserved thickness.

When welding the rail vehicle bolster according to the present invention, the aluminum alloy rail vehicle bolster profile is first processed according to their respective usage requirements, and then the profile is tailor-welded into the corbel body, and then the anti-rolling mounting seat 201 is welded to the outer side rail On the side of the vehicle bolster, the top surface of the assembled rail vehicle bolster is processed into a U-shaped process gap; the rail vehicle bolster is fixed on the platform, and the thickness reserved for the bottom surface of the rail vehicle bolster is processed as required. Then, the positioning screw block 202 is assembled into the anti-rolling mounting seat 201 and fixed, and finally constitutes the rail vehicle corbel in this article. It should be noted that the reserved thickness of the bottom surface of the rail vehicle bolster can also be adjusted to the end structure after the welding is completed. The corbel main body, the traction beam and the buffer beam are assembled and welded into the end structure, and finally the end structure, the underframe side beam, the underframe floor, and the floor connecting profile 307 are assembled together to form the car body underframe. The specific implementation process is as follows:

1) Aluminum alloy rail vehicle corbel beam profiles are mainly extruded from the upper plate, lower plate and stiffener plate. The thickness of the lower plate of the profile is thicker than the upper plate, and the upper surface of the upper plate is flush with the upper surface of the underframe floor. The plane of the board should be processed to the reserved thickness, and finally flush with the lower surface of the side beam of the underframe.

2) The main structure of the aluminum alloy bolster is welded by the middle bolster 103, the first side bolster 101 and the second side bolster 102, among which the first side bolster 101, the middle bolster 103 and the second side bolster 102 are sequentially distributed along the longitudinal direction of the vehicle body; the middle bolster 103 is an integrated structure, and the first side bolster 101 and the second side bolster 102 are an integrated structure. When welding, the main welding seam of the main body of the bolster along the transverse direction of the car body is welded through the butt joint W1 and the butt joint W2.

3) Install the top surface m2 of the anti-rolling mounting seat 201 flush with the bottom surface of the main body of the corbel, and install it in matching with the square notch opened on the first side corbel 101; the first mounting side 2011 and the horizontal of the square notch The second installation side 2012 and the third installation side 2013 are respectively installed perpendicularly to the outer rib S4 of the first side bolster 101, and then the anti-rolling mounting seats 201 at both ends are welded to the first side bolster through the welding seam W3. The outside of beam 101.

4) Process the welded rail car bolster assembly structure: along the longitudinal direction of the rail car bolster, a U-shaped process is processed at the middle position of the top surface of the rail car bolster assembly and the two ends of the underframe side beam connected to the bottom frame. The gap q2 is used for welding the internal vertical ribs of the rail vehicle bolster assembly and the side beam of the underframe. During processing, the opening size of the U-shaped process gap q2 does not exceed the position of the vertical ribs inside the rail vehicle bolster.

5) Machining the reserved thickness S32 on the bottom surface of the main body of the corbel, and partially adjust it to ensure that the plane meets the required flatness requirements.

6) Assemble the positioning threaded block 202 into the welded anti-rolling mounting seat 201. The positioning threaded block 202 passes through the top surface m2 of the anti-rolling mounting seat 201, while ensuring that the upper structure m3 bottom surface of the positioning threaded block 202 and The top surface m2 of the anti-rolling mounting seat 201 is in contact with the side m4 of the positioning threaded block 202 and the inner surface of the front m1 of the anti-rolling mounting seat 201 is in contact with each other. After the installation is completed, the threaded hole on the side m4 of the threaded block 202 will be positioned Tap it out and match the threaded hole on the front face m1 of the anti-rolling mounting seat 201.

7) The bolster is assembled and welded into the end structure, and then the welded end structure is assembled and welded into the underframe. Fix the upper cover plate of the end structural corbel 304 to the left side frame side beam 301 and the right side frame side beam 303 by spot welding with the plane facing upwards, and first weld the rail vehicle corbel to assemble the vertical rib plate S3 on the inner side and the underframe The welding seam W4 on the vertical plane inside the side beam is spot-welded and fixed to the end cover 302 of the rail vehicle bolster, and the welding seam W5 connecting the end cover 302 and the rail vehicle bolster is welded, and finally the rail vehicle bolster and the underframe are welded The longitudinal welding seam W6 of the side beam, the upper surface of the rail vehicle corbel 304 of the end structure and the side beam of the underframe are welded.

8) After the main welding seam on the top surface of the underframe assembly is completed, the underframe is turned over to weld the welding seam on the lower plane of the rail vehicle corbel. First, weld the end structure rail vehicle bolster 304 outer vertical rib plate S4 and the underframe side beam weld W7, then weld the end structure rail vehicle bolster 304 and the underframe side beam longitudinal weld W8, after the welding is completed, the rail vehicle The flatness of the bottom surface of the corbel is measured and locally adjusted to ensure that the flatness of the plane reaches within 0.5. At the same time, it is ensured that the plane of the lower cover of the corbel of the rail vehicle is flush with the lower plane of the side beam of the underframe.

9) Arrange the underframe short floor 305, the floor connection profile 307, the end structure rail car bolster 304, the floor connection profile 307, and the underframe long floor 306 in the longitudinal direction of the car body, and weld them together to form the non-standard structure described in this article. The underframe structure of the long underframe floor.

10) After the bottom frame is assembled, the connection between the anti-rolling torsion rod mounting seat 401 and the anti-rolling mounting seat 201 is further explained. A bogie anti-rolling torsion rod seat is installed on the anti-rolling mounting seat 201 so as to connect the bogie anti-rolling torsion rod. Install and fix the bolts 402 from the outside through the anti-side-rolling torsion rod seat installation surface, the plane of the anti-side-rolling torsion rod installation seat 401, and the bolt holes on the lower part m4 of the positioning thread block 202 for subsequent anti-rolling of the bogie Torsion bar connection. Specifically, the length H1 of the positioning screw block 202 is adapted to the length H2 of the inner height H2 of the anti-rolling mounting seat 401.

Example three

The present invention provides an underframe including the rail vehicle corbel as in any one of the above embodiments.

Since the underframe disclosed in the present invention includes the rail vehicle bolster in any one of the above embodiments, the beneficial effects of the above-mentioned rail vehicle bolster are included in the underframe disclosed in the present invention.

Example four

The present invention provides a method for welding a chassis, including the following steps:

Step S1: Fabricate the corbel main body, and open process gaps at both ends of the top surface of the corbel main body.

Specifically, the process gap is a U-shaped gap.

Step S2: welding the main body of the corbel with the traction beam and the buffer beam together to form the end structure, that is, the end structure corbel;

Step S3: Weld the vertical weld between the inner side rib of the end structure bolster and the inner side of the side beam of the underframe through the process notch.

Step S4: Cover the end cover 302 on the process gap, and weld the periphery of the end cover 302 and the weld of the end structural bolster.

Step S5: Weld the longitudinal welding seam between the top surface of the end structural corbel and the side beam of the underframe.

Step S6: Turn the bottom frame over, and weld the vertical welds between the outer plates of the end structure bolsters and the side beams of the bottom frame.

Step S7: Weld the longitudinal welds between the bottom surface of the end structural corbel and the side beam of the underframe.

Step S8: Place the underframe floor and the floor connecting profile 307 in sequence on both sides of the corbel of the end structure, and weld the floor connecting profile 307 to both sides of the corbel body, and then weld it with the floor profile, and the corbel body The top surface is flush with the top surface of the underframe floor.

In the present invention, since the process gap is provided on the top surface of the main body of the corbel, it is avoided that the process gap is arranged on the lower plane of the rail vehicle bolster, and the problem of poor flatness of the lower plane caused by blocking the gap is avoided. In addition, the underframe floor and the floor connecting profile 307 are welded on both sides of the main body of the bolster, and the top surface of the main body of the bolster is flush with the top surface of the underframe, that is, the underframe is arranged in blocks instead of a full-length structure. It avoids that the welding seam between the rail vehicle bolster and the underframe floor is concentrated on one side, reducing the welding deformation. The invention can avoid the traditional process gap being set on the bottom surface of the rail car bolster. After the cover plate and the rail car bolster are welded, the car body underframe needs to be machined as a whole, which takes up a large platform due to the need to flatten the welding seam. Bit work hours consume more manpower.

Example five

In the fifth embodiment provided by the present invention, the rail vehicle bolster welding method in this embodiment is similar to the rail vehicle bolster welding method in the fourth embodiment. The similarities are not repeated here, and only the differences are introduced. Place.

In this embodiment, the present invention discloses that step S1 specifically includes the following steps:

Step S1-1: The first side bolster 101 and the second side bolster 102 are respectively placed on both longitudinal sides of the middle bolster 103, and the joints between the first side bolster 101 and the middle bolster 103 are respectively welded through butt joints. The weld and the weld between the second side bolster 102 and the middle bolster 103.

Step S1-2: A process notch matching the end cover plate is processed at the middle position of the top surface of the corbel body along the longitudinal direction of the corbel body.

Further, the present invention discloses that the bottom surface of the first side bolster 101 in step S1-1 is provided with installation notches along the two lateral ends of the vehicle body.

Step S1-1 and step S1-2 also include step S9: install the top surface of the anti-rolling mounting seat 201 flush with the bottom surface of the main body of the corbel in the installation notch, and weld it in the installation notch.

Step S1-2 and step S2 also include step S10: install and fix the bottom surface of the corbel body upwards, machine the bottom surface of the corbel body to remove the reserved thickness, and partially adjust it to ensure the bottom surface of the corbel body Meet the flatness requirements for installing the bogie air spring.

Step S9 and step S2 also include step S11: insert the positioning threaded block into the anti-rolling mounting seat 201, and tap the threaded hole on the positioning threaded block to match the threaded hole on the anti-rolling mounting seat 201.

It should be noted that processing the reserved thickness of the bottom surface of the rail vehicle bolster can also be adjusted to the end structure after the body of the bolster is welded. That is, step S10 is set between steps S2 and S3: install and fix the bottom surface of the end structure corbel upwards, machine the bottom surface of the corbel body to remove the reserved thickness, and partially adjust it to ensure that the bottom surface of the corbel body reaches The flatness required for the installation of the bogie air spring. Correspondingly, step S11 is provided between step S7 and step S8.

In the description of the present invention, the direction of the term definition is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood. To limit the present invention.

The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown in this document, but should conform to the widest scope consistent with the principles and creative features disclosed in this document.

Claims

A rail vehicle corbel, which is characterized by comprising a corbel body, an end cover, and floor connecting profiles welded on both longitudinal sides of the corbel body;

The longitudinal welds at both ends of the top surface of the corbel body and the longitudinal welds at both ends of the bottom surface of the corbel body are respectively longitudinally welded to the side beams of the underframe;

The main body of the corbel and the side beam of the underframe are welded to the inner side of the side beam of the underframe through the vertical ribs on the main body of the corbel in the vertical direction;

The inner side of the floor connecting profile is welded to the corbel main body, the outer side of the floor connecting profile is welded to the underframe floor, and the top surface of the corbel main body is flush with the top surface of the underframe floor;

The two ends of the top surface of the corbel main body are provided with process gaps, and the end cover plates are sealed on the process gaps.
The rail vehicle bolster according to claim 1, wherein the bolster body includes a first side bolster, a second side bolster, and a middle bolster;

The first side bolster and the second side bolster are respectively welded on both longitudinal sides of the middle bolster.
The rail vehicle bolster according to claim 2, further comprising an anti-rolling structure;

The anti-rolling structure includes an anti-rolling mounting seat and a positioning threaded block;

An installation notch is provided on the bottom surface of the first side bolster, the anti-rolling mounting seat is welded in the mounting notch, and the top surface of the anti-rolling mounting seat is flat with the bottom surface of the bolster body Qi

The positioning threaded block can be slidably inserted into the anti-rolling mounting seat, the positioning threaded block is provided with a threaded hole, and the anti-rolling mounting seat is provided with a thread coaxial with the threaded hole. Through holes, bolts can pass through the through holes to be connected with the threaded holes, and the anti-rolling torsion rod mounting seat is installed on the anti-rolling mounting seat.
The rail vehicle bolster according to claim 3, wherein the positioning threaded block is a T-shaped block, and the head of the T-shaped block is clamped on the top surface of the anti-rolling mounting seat.
The rail vehicle bolster according to claim 3, wherein the anti-rolling mounting seat is a square box-shaped hollow structure, and the circumference of the anti-rolling mounting seat is provided with an inwardly inclined first Welding groove, the first welding groove is welded to the installation notch and the outer vertical rib plate of the corbel body;

The circumferential direction of the process gaps at both ends of the top surface of the main body of the corbel is provided with a second welding groove for welding with the end cover plate.
The rail vehicle corbel according to any one of claims 1 to 5, wherein the bottom surface of the corbel body is flush with the bottom surface of the side beam of the underframe after machining.
An underframe, characterized by comprising the rail vehicle corbel according to any one of claims 1-6.
A method for welding an underframe is characterized in that it comprises the following steps:

Step A: Fabricate the corbel main body, and open process gaps at both ends of the top surface of the corbel main body;

Step B: welding the main body of the corbel with the traction beam and the buffer beam together to form an end structure, that is, the end structure corbel;

Step C: Weld the vertical weld between the inner side rib of the end structure bolster body and the inner side of the side beam of the underframe through the process gap;

Step D: Set the end cover plate on the process gap, and weld the periphery of the end cover plate and the weld seam of the end structure bolster;

Step E: Weld the longitudinal weld between the top surface of the end structure corbel and the side beam of the underframe;

Step F: Turn the bottom frame over, and weld the vertical welds between the outer plate of the end structure corbel and the side beam of the bottom frame;

Step G: Weld the longitudinal weld between the bottom surface of the end structure corbel and the side beam of the underframe;

Step H: Place floor connection profiles and floor profiles in sequence on both sides of the end structure corbel, and weld the floor connection profiles on both sides of the corbel body, and then weld them with the floor profiles, And the top surface of the main body of the corbel is flush with the top surface of the floor.
The underframe welding method according to claim 8, wherein the step A specifically includes the following steps:

Step A1: The first side bolster and the second side bolster are respectively placed on both longitudinal sides of the middle bolster, and the welds and the welds between the first side bolster and the middle bolster are respectively welded through butt joints. The weld between the second side bolster and the middle bolster;

Step A2: A process notch matching with the end cover is machined at the middle position of the top surface of the corbel body along the longitudinal direction of the corbel body.
The underframe welding method according to claim 9, wherein the bottom surface of the first side bolster in the step A1 is provided with installation notches along the lateral ends of the vehicle body;

The step A1 and the step A2 further include a step I: the top surface of the anti-side-rolling mounting seat and the bottom surface of the corbel body are installed flush in the installation notch, and welded to the installation notch Inside;

Between the step A2 and the step B or between the step G and the step H, the method further includes a step J: installing and fixing the bottom surface of the corbel body upward, and fixing the bottom surface of the corbel body Process the reserved thickness and partially adjust it to ensure that the bottom surface of the main body of the bolster meets the flatness requirements required for the installation of the bogie air spring;

The bottom frame welding method further includes step K: inserting the positioning threaded block into the anti-rolling mounting seat, and the threaded hole on the positioning threaded block is tapped and matched with the threaded hole on the anti-rolling mounting seat ；

When the step J is located between the step A2 and the step B, the step K is located between the step J and the step B;

When the step J is located between the step G and the step H, the step K is located between the step J and the step H.