CN111015036A - Method for manufacturing metro vehicle underframe - Google Patents
Method for manufacturing metro vehicle underframe Download PDFInfo
- Publication number
- CN111015036A CN111015036A CN201911381439.2A CN201911381439A CN111015036A CN 111015036 A CN111015036 A CN 111015036A CN 201911381439 A CN201911381439 A CN 201911381439A CN 111015036 A CN111015036 A CN 111015036A
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- Prior art keywords
- underframe
- welding
- floor
- boundary beam
- manufacturing
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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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
-
- 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
Abstract
The invention discloses a method for manufacturing a metro vehicle underframe, which mainly comprises the following steps: the method comprises the following steps: assembling and welding the underframe edge beam I, the plurality of floor profiles and the underframe edge beam II to obtain a prefabricated underframe; step two: taking the prefabricated underframe out of the tire and adjusting and repairing; step three: the adjusted and repaired prefabricated underframe is in a reverse installation state, and tie-down alleviating underframe end beams are assembled and welded to obtain a middle-made underframe; step four: transferring and transporting the welded middle-made underframe out of the tire, and performing flame repair; step five: processing the adjusted and repaired middle-made underframe, and mounting accessories to obtain the underframe of the subway vehicle; the invention assembles the underframe boundary beam and the floor section before assembling and welding the components such as the traction bolster, the end beam and the like, so that the assembly of the underframe boundary beam and the floor section can meet two different assembling modes of splicing and lapping, simultaneously solves the problem that the connection mode of the underframe boundary beam and the floor of the splicing structure can not place the floor into a tire and assemble after the boundary beam is positioned, and effectively shortens the manufacturing period of the underframe.
Description
Technical Field
The invention belongs to the technical field of vehicle manufacturing, and particularly relates to a manufacturing process method of a metro vehicle chassis.
Background
The existing subway vehicle body underframe is generally formed by assembling and welding parts such as a traction bolster, an end part and seven long large-scale materials; wherein, the five floor sectional materials are generally connected in a butt joint mode, and the floor sectional materials at two sides and the edge beam of the underframe are connected in a lap joint mode (the structure is shown in figure 1 and figure 3); according to the conventional lap joint connection mode of the side beam of the underframe and the floor, the manufacturing process of the underframe parts comprises the steps of putting a sleeper beam into a forward mounting tire for positioning, pulling and slowly putting the forward mounting tire for positioning, putting the side beam of the underframe into the forward mounting tire for positioning, pulling and slowly fixing the sleeper, point-fixing the side beam, welding the floor into the forward mounting tire, point-fixing, welding a main beam of the forward mounting side beam, assembling an end beam, welding, overturning, welding a main beam of the reverse mounting tire, installing an accessory of the reverse mounting underframe, adjusting and repairing the underframe, processing the underframe, installing accessories of the forward mounting underframe, gluing the underframe, preparing and handing over. Through analyzing the structure of the floor profile, when the lap weld of the side beam of the bottom frame and the floor profile is welded by a manual welding gun or an automatic welding gun, the height sizes of the side beam of the bottom frame and the floor surface are different due to the difference of different product structures, so that the welding space of the lap weld at the position is limited.
In order to improve the welding operability of the position, the connection welding seams of the edge beam and the floor of the underframe of the subsequent subway vehicle are changed into the insertion structure form, so that the weldability of the lap welding seams at the position is greatly improved; aiming at an underframe boundary beam and floor splicing structure (the structure is shown in fig. 2 and 4) for improving welding manufacturability, the existing manufacturing process method of the underframe boundary beam is as follows: putting a sleeper beam into a forward mounting tire for positioning, pulling and slowly putting the forward mounting tire for positioning, putting a floor into a forward mounting tire for positioning, putting the center of the floor and the sleeper beam, pulling and slowly centering, putting left and right boundary beams into a tire for assembling, adjusting the width of an underframe, point-fixing the boundary beam and the floor and pulling and slowly, welding the boundary beam on the front side on a large line, assembling an end beam, welding, overturning, welding the boundary beam on the back side on a large line, installing an underframe reverse mounting accessory, adjusting and repairing the underframe, processing the underframe, installing the underframe forward mounting accessory, gluing the underframe, preparing and handing over (as shown in figures 5 to 9). However, the manufacturing process of the chassis component is affected by the improvement of the welding structure:
(1) after the floor is put into the tire, the left and right boundary beams are spliced and assembled with the floor, compared with a lap joint structure (the floor directly falls into the tire for positioning), the through long boundary beam needs to be spliced and assembled with a floor section bar, the assembly difficulty is higher (as shown in figure 7), and a device for positioning the boundary beam on the width of the underframe needs to be movably arranged and can be moved and adjusted towards the outer side, so that the left and right boundary beams can be put into the tire and then moved towards the inner side, the assembly operation is complex, the adjustment time is long, and the integral manufacturing period of the underframe part is prolonged;
(2) compared with the underframe assembling process of the lap joint structure, the edge beam positioning device needs to be moved and adjusted every time one underframe is assembled, so that the repeated adjustment easily causes the deviation of the positioning reference of each underframe edge beam before welding to influence the width dimension of the underframe, and the width dimension of the underframe is the key dimension of a vehicle, so the assembling method can influence the manufacturing precision of underframe parts.
Disclosure of Invention
The invention aims to overcome the defects of the existing scheme, and provides an underframe manufacturing process method which is suitable for an underframe boundary beam and a floor and adopts an inserting structure, so as to overcome the defects of long manufacturing period and low product quality in the existing car body manufacturing process.
In order to achieve the purpose, the invention adopts the technical scheme that: provided is a manufacturing process method of a metro vehicle underframe, wherein parts to be assembled comprise: the traction and bolster buffer, the end beam of the underframe, the edge beam of the underframe and a plurality of floor profiles; firstly, assembling and welding an underframe boundary beam I, a plurality of floor profiles and an underframe boundary beam II to obtain a prefabricated underframe; then, the prefabricated underframe after the middle welding is taken out of the tire to be adjusted and repaired; then, the adjusted and repaired prefabricated underframe is in a reverse installation state, and tie-down alleviating underframe end beams are assembled and welded to obtain a middle-made underframe; then, transferring and transporting the welded middle-made underframe out of the tire, and performing flame repair; and finally, processing the adjusted and repaired middle-made underframe, and installing accessories to obtain the underframe of the subway vehicle.
Preferably, the welding in the step one is carried out on an automatic floor welding tool, and the automatic welding of normal and reverse installation is carried out after the assembling and positioning are finished.
Preferably, adjacent floor sections are assembled in a butt joint manner.
Preferably, the floor section bars and the side beams of the underframe are assembled in an inserting or overlapping mode.
Preferably, the assembly sequence in step one is: the method comprises the steps of firstly positioning an underframe boundary beam I, sequentially assembling a plurality of floor sectional materials by taking the underframe boundary beam I as a reference, and then assembling an underframe boundary beam II and the last floor sectional material located on the outermost side.
Preferably, the welding sequence in the first step is as follows: welding the welding seams at the two sides of the floor sectional material in the middle position, and then welding the other welding seams outwards by taking the two welding seams as the reference.
The manufacturing method of the metro vehicle underframe provided by the invention has the beneficial effects that compared with the prior art:
(1) two side frame side beams are adjusted to the automatic welding tire position of the floor section bar for integral assembly, and the side frame side beams of the side frame and the adjacent single floor section bar are spliced and assembled, so that the difficulty is greatly reduced compared with the assembly of the side frame side beams of the side frame and the integral floor part.
(2) Four welding seams on the front side and the back side of the edge beam of the bottom frame are adjusted to be integrally assembled and automatically welded on a floor welding tool by adopting a manual welding mode on the original bottom frame assembling and welding tool, and the welding operation efficiency is improved by more than 20% at least.
(3) The operation content on the chassis assembly welding tool is adjusted by the original chassis assembly welding and the reversed assembly welding, the chassis is only required to be adjusted into the chassis reversed assembly welding tool, the traction, bolster and end beam are welded, the one-time tire positioning and one-time assembly and welding forming are realized, the turning operation of the front and reversed assembly is not required, the operation time is saved, and the size precision of the whole assembly and the welded bottom frame is improved.
(4) The underframe boundary beam and the floor sectional material are assembled before components such as traction and bolster buffering components, end beams and the like are assembled and welded, so that the assembly of the underframe boundary beam and the floor sectional material can meet two different assembling modes of splicing and lapping.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic view of a prior art underframe edge beam and floor section bar lap joint assembly;
FIG. 2 is a schematic view of a prior art underframe edge beam and floor profile being assembled by splicing;
FIG. 3 is an enlarged view of a portion A of FIG. 1;
FIG. 4 is an enlarged view of portion B of FIG. 2;
FIGS. 5-9 are schematic diagrams of a prior art assembly and welding process;
wherein, fig. 5 is prior art sleeper beam, slow-in tire positioning;
FIG. 6 is a prior art floor entry positioning;
FIG. 7 illustrates the assembly and welding of prior art edge beams during the assembly of the tire;
FIG. 8 illustrates prior art end beam assembly and welding;
FIG. 9 is a prior art reverse welded tie-down buffer and end beam reverse weld;
FIGS. 10-13 are schematic views illustrating an assembly and welding process according to an embodiment of the present invention;
the floor comprises 1-a floor section I, 2-a floor section II, 3-a floor section III, 4-a floor section IV, 5-a floor section V, 6-an underframe boundary beam I, 7-an underframe boundary beam II, 8-a welding gun, 9-a traction and bolster buffer, 10-a prefabricated underframe, 11-an underframe end beam and 12-a middle-made underframe.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a manufacturing process method of a metro vehicle underframe, which aims to solve the problems in the prior art, effectively shorten the manufacturing period of the underframe, improve the manufacturing precision of underframe parts and finally realize the purpose of obtaining the optimal and fastest output with the least investment.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The first embodiment is as follows:
as shown in fig. 10 to 13, the manufacturing process method of the metro vehicle underframe in the present embodiment, wherein the parts to be assembled include: floor section bar 1, floor section bar two 2, floor section bar three 3, floor section bar four 4, floor section bar five 5, chassis boundary beam I6, chassis boundary beam II 7, lead and tie down and delay 9 and chassis end beam 11 mainly include following step:
as shown in fig. 10, step one: firstly, positioning an underframe boundary beam I6, sequentially assembling a floor profile I1, a floor profile II 2, a floor profile III 3, a floor profile IV 4 and a floor profile V5 by taking the underframe boundary beam I6 as a reference, assembling an underframe boundary beam II 7 and the floor profile V5 positioned on the outermost side, welding the welding seams at two sides of the floor profile III 3 positioned in the middle, and finally welding the rest welding seams outwards by taking the two welding seams as the reference to obtain a prefabricated underframe 10;
step two: taking the prefabricated underframe 10 out of the tire for adjustment and repair;
as shown in fig. 11 and 12, step three: the adjusted and repaired prefabricated underframe 10 is in a reverse installation state, and a traction and bolster cushion 9 and an underframe end beam 11 are assembled and welded to obtain a middle-made underframe 12;
step four: transferring the welded middle-made underframe 12 out of the tire, and performing flame repair;
step five: and (4) processing the adjusted and repaired middle-made underframe 12, installing accessories, finally obtaining a complete subway vehicle underframe, and gluing for inspection.
In the embodiment, the underframe edge beam I6 and the underframe edge beam II 7 are the same in structure and can be interchanged.
In this embodiment, the adjacent floor sections in step one are assembled by butt-joint.
In the embodiment, the floor section bar and the underframe boundary beam in the first step are assembled in a splicing manner.
In the embodiment, the welding in the step one is carried out on the automatic floor welding tool through the automatic welding gun 8, and the automatic welding of the forward installation and the backward installation is carried out after the assembling and positioning are finished.
Example two:
compared with the first embodiment, the manufacturing process method of the metro vehicle underframe in the embodiment is only different in that: and the floor sectional material and the side beam of the bottom frame in the step one are assembled in a lap joint mode.
The manufacturing method of the metro vehicle underframe of the embodiment of the invention adjusts the two side underframe side beams to the automatic welding positioner of the floor section bar for integral assembly, and the side beams of the underframe are spliced and assembled with the adjacent single floor section bar, so that the difficulty is greatly reduced compared with the assembly of the side beams of the underframe and the integral floor part; the front side and the back side of the edge beam of the bottom frame are totally four welding seams, and the whole assembly and the automatic welding are carried out on the floor welding tool by adjusting the original manual welding mode on the bottom frame assembly welding tool, so that the welding operation efficiency is obviously improved; the operation content on the underframe assembly welding tool is adjusted by the original underframe forward assembly welding and reverse assembly welding, namely the underframe is only required to be adjusted into the underframe reverse assembly welding tool to weld the components of the traction bolster and the end beam, so that the one-time tyre positioning, one-time assembly and welding forming are realized, the forward and reverse assembly overturning operation is not required, the operation time is saved, and the overall assembly and welded size precision of the underframe is improved; the problem of the connected mode on chassis boundary beam and floor of grafting structure can't go into child, assembly with the floor after the boundary beam location is effectively solved, make its manufacturing cycle who effectively shortens the chassis, the preparation precision of chassis part has been improved, the final realization obtains the optimality with minimum input, fastest output, assemble chassis boundary beam and floor section bar before parts such as assembly, welding traction and bolster are slowed down, end beam, make the assembly of its chassis boundary beam and floor section bar can satisfy the assembly mode of pegging graft and overlap joint two kinds of differences, and then improved the adaptability of whole production line.
The adaptation according to the actual needs is within the scope of the invention.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (6)
1. A method of manufacturing a metro vehicle underframe, wherein the parts to be assembled comprise: lead and tie down slow, chassis end beam, chassis boundary beam I, chassis boundary beam II and a plurality of floor section bar, its characterized in that:
the method comprises the following steps: assembling and welding the underframe boundary beam I, the plurality of floor profiles and the underframe boundary beam II to obtain a prefabricated underframe;
step two: taking the prefabricated underframe out of the tire and adjusting and repairing;
step three: the prefabricated underframe after adjustment and repair is in a reverse installation state, and the traction bolster and the bottom frame end beam are assembled and welded to obtain a middle-made underframe;
step four: transferring and transporting the welded middle-made underframe out of the tire, and performing flame repair;
step five: and processing the adjusted and repaired middle-made underframe, and installing accessories to obtain the subway vehicle underframe.
2. The method for manufacturing the underframe of a metro vehicle as claimed in claim 1, wherein: and welding in the step one is carried out on an automatic floor welding tool, and automatic welding of normal and reverse installation is carried out after assembling and positioning are finished.
3. The method for manufacturing the underframe of a metro vehicle as claimed in claim 2, wherein: and in the step one, the floor sectional material is assembled with the underframe boundary beam I and the underframe boundary beam II in an inserting or overlapping mode.
4. The method for manufacturing the underframe of a metro vehicle as claimed in claim 3, wherein: and in the step one, the adjacent floor profiles are assembled in a butt joint mode.
5. The manufacturing method of the underframe of a metro vehicle as claimed in any one of claims 1 to 4, wherein: the assembly sequence in the first step is as follows: the method comprises the steps of firstly positioning the underframe boundary beam I, sequentially assembling a plurality of floor sectional materials by taking the underframe boundary beam I as a reference, and then assembling the underframe boundary beam II and the last floor sectional material on the outermost side.
6. The method for manufacturing the underframe of a metro vehicle as claimed in claim 5, wherein: the underframe boundary beam I, a plurality of floor section bar with underframe boundary beam II forms a plurality of welding seams each other after accomplishing the assembly again, the welding order in step one is: welding the welding seams at the two sides of the floor sectional material in the middle position, and then welding the other welding seams outwards by taking the two welding seams as the reference.
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| CN201911381439.2A CN111015036B (en) | 2019-12-27 | 2019-12-27 | Method for manufacturing metro vehicle underframe |
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| CN201911381439.2A CN111015036B (en) | 2019-12-27 | 2019-12-27 | Method for manufacturing metro vehicle underframe |
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Cited By (3)
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| CN112171095A (en) * | 2020-09-24 | 2021-01-05 | 中车长春轨道客车股份有限公司 | Shape and position deformation control welding method for underframe floor of motor train unit |
| CN114194240A (en) * | 2022-01-20 | 2022-03-18 | 河北京车轨道交通车辆装备有限公司 | Modular subway underframe and manufacturing method thereof |
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| CN111015036B (en) | 2020-11-13 |
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