WO2021068498A1 - Poutre de traverse de véhicule de chemin de fer, sous-châssis et procédé de soudage de sous-châssis - Google Patents

Poutre de traverse de véhicule de chemin de fer, sous-châssis et procédé de soudage de sous-châssis Download PDF

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Publication number
WO2021068498A1
WO2021068498A1 PCT/CN2020/088909 CN2020088909W WO2021068498A1 WO 2021068498 A1 WO2021068498 A1 WO 2021068498A1 CN 2020088909 W CN2020088909 W CN 2020088909W WO 2021068498 A1 WO2021068498 A1 WO 2021068498A1
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WO
WIPO (PCT)
Prior art keywords
corbel
bolster
underframe
main body
mounting seat
Prior art date
Application number
PCT/CN2020/088909
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English (en)
Chinese (zh)
Inventor
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
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Application filed by 中车株洲电力机车有限公司 filed Critical 中车株洲电力机车有限公司
Publication of WO2021068498A1 publication Critical patent/WO2021068498A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
    • B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
    • B23K37/047—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work moving work to adjust its position between soldering, welding or cutting steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
    • B61F1/00—Underframes
    • B61F1/08—Details

Definitions

  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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 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.
  • the bottom surface of the corbel body is flush with the bottom surface of the side beam of the underframe.
  • 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.
  • 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.
  • the present invention provides the following solutions:
  • An underframe includes the rail vehicle bolster as described in any one of the above.
  • 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.
  • 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.
  • 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 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;
  • 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 ;
  • step J 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;
  • the step K is located between the step J and the step H.
  • 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.
  • 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.
  • 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.
  • 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 is provided.
  • 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 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.
  • 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.
  • 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 rail vehicle bolster further includes an anti-rolling structure 104
  • 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
  • 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.
  • 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.
  • 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.
  • 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.
  • the anti-rolling mounting seat 201 has a square box structure.
  • 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
  • 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.
  • the profile cross-sections of the first side bolster 101 and the second side bolster 102 are the same.
  • the first side bolster 101 is provided with installation notches on both sides along the longitudinal direction of the profile.
  • 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.
  • S1 is the upper plate plane of the first side bolster 101
  • S2 is the lower plate plane of the first side bolster 101
  • S3 is the track of the first side bolster 101
  • S4 is the vertical ribs on the outer side of the rail vehicle bolster of the first side bolster 101
  • the rib structure in the middle can be flexibly designed according to actual rigidity requirements.
  • Square notches q1 ie, installation notches
  • 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.
  • 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.
  • 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.
  • 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
  • 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.
  • 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.
  • 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:
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • the bolster is assembled and welded into the end structure, and then the welded end structure is assembled and welded into 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.
  • the underframe is turned over to weld the welding seam on the lower plane of the rail vehicle corbel.
  • weld the end structure rail vehicle bolster 304 outer vertical rib plate S4 and the underframe side beam weld W7 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.
  • 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.
  • 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.
  • the present invention provides an underframe including the rail vehicle corbel as in any one of the above embodiments.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • step S11 is provided between step S7 and step S8.

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  • Mechanical Engineering (AREA)
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  • Butt Welding And Welding Of Specific Article (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

La présente invention concerne une poutre de traverse de véhicule de chemin de fer, comprenant un corps principal de poutre de traverse, des plaques de recouvrement de partie d'extrémité (302) et des profils de liaison de plancher (307) soudés sur deux côtés longitudinaux du corps principal de poutre de traverse ; les côtés externes des profils de liaison de plancher au niveau des deux extrémités longitudinales du corps principal de poutre de traverse sont respectivement soudés à des planchers (305, 306) et la surface supérieure du corps principal de poutre de traverse est à fleur avec les surfaces supérieures des planchers ; des encoches de traitement (q2) sont ménagées sur deux côtés de la surface supérieure du corps principal de poutre de traverse ; une plaque de nervure sur le côté interne du corps principal de poutre de traverse et une sur le côté interne d'une poutre latérale d'un sous-châssis sont soudées au moyen d'une ligne de soudure verticale entre elles, les plaques de recouvrement de partie d'extrémité recouvrent les encoches de traitement, les périphéries des plaques de recouvrement de partie d'extrémité sont soudées au corps principal de poutre de traverse, la surface supérieure du corps principal de poutre de traverse et la poutre latérale du sous-châssis sont soudées au moyen d'une ligne de soudure longitudinale entre elles, une plaque de nervure sur le côté externe d'une poutre de traverse du corps principal de poutre de traverse et la poutre latérale du sous-châssis sont soudées au moyen d'une ligne soudure verticale entre celles-ci et la surface inférieure du corps principal de poutre de traverse et la poutre latérale du sous-châssis sont soudées au moyen d'une ligne de soudure longitudinale entre elles. La présente invention se rapporte en outre à un sous-châssis et à un procédé de soudage de sous-châssis.
PCT/CN2020/088909 2019-10-08 2020-05-07 Poutre de traverse de véhicule de chemin de fer, sous-châssis et procédé de soudage de sous-châssis WO2021068498A1 (fr)

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CN113442966B (zh) * 2020-03-27 2022-10-18 比亚迪股份有限公司 用于轨道车辆的转向架和具有其的轨道车辆
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CN113602308B (zh) * 2021-08-20 2023-07-07 中车株洲电力机车有限公司 一种轨道车辆底架
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