CN102390014A - Assembling method for centre sill and body bolster of underframe of railway wagon - Google Patents
Assembling method for centre sill and body bolster of underframe of railway wagon Download PDFInfo
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- CN102390014A CN102390014A CN2011102295776A CN201110229577A CN102390014A CN 102390014 A CN102390014 A CN 102390014A CN 2011102295776 A CN2011102295776 A CN 2011102295776A CN 201110229577 A CN201110229577 A CN 201110229577A CN 102390014 A CN102390014 A CN 102390014A
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Abstract
The invention provides an assembling method for a centre sill and a body bolster of an underframe of a railway wagon. The centre sill comprises an assembling area and a non-assembling area, wherein the assembling area is assembled with the body bolster, and the non-assembling area is arranged outside the assembling area. The assembling method comprises the following steps: pressing to bend the centre sill lower cover plate of the assembling area of the centre sill so as to enable the centre sill lower cover plate to have a bottom face and a bent face with preset bending height; pairing centre sill parts and welding into the centre sill; pairing body bolster parts and welding into the body bolster; in the non-assembling area of the centre sill, from the side edge of the centre sill, inserting the body bolster web plate of the body bolster between the centre sill upper cover plate and the centre sill lower cover plate of the centre sill into an assembly state; along the centre sill, moving the body bolster to the assembling area from the non-assembling area; and connecting and fixing the body bolster with the centre sill. The assembling method for the centre sill and the body bolster of the underframe of the railway wagon is capable of improving the assembling efficiency and quality of the centre sill and the body bolster.
Description
Technical field
The present invention relates to mechanical technique, particularly the assemble method of a kind of central sill of body frame and sleeper beam.
Background technology
In the underframe of heavy axle load wagon, comprise sleeper beam, crossbeam and central sill etc., Fig. 1 is the structural representation of the central sill in the prior art railway freight-car underframe, and Fig. 2 is the structural representation of the sleeper beam in the prior art railway freight-car underframe.Wherein, Central sill comprises central sill upper cover plate 11, central sill lower cover 12 and middle web 13; This central sill lower cover 12 has bottom surface 121 and folding surface 122, forms first spacing 14 between bottom surface 121 and the central sill upper cover plate 11, forms second spacing 15 between folding surface 122 and the central sill upper cover plate 11.Sleeper beam comprises sleeper beam upper cover plate 21, sleeper beam lower cover 22 and body bolster diaphragm 23, wherein, forms the 3rd spacing 24 between the upper and lower surfaces of body bolster diaphragm 23.
Fig. 3 is central sill and the package assembly sketch map one of sleeper beam in the prior art railway freight-car underframe, and Fig. 4 is central sill and the package assembly sketch map two of sleeper beam in the prior art railway freight-car underframe, and Fig. 4 is the cutaway view of Fig. 3 in the A-A position.As shown in Figure 3, can this central sill 31 be divided into assembling area B and non-assembling zone C, central sill 31 is to connect two sleeper beams 32 respectively in the assembling area B, and does not assemble with sleeper beam in non-assembling zone C; Central sill 31 makes that with respect to the central sill lower cover at non-assembling zone C place is protruding a little width b1 is bigger at the central sill lower cover at assembling area B place; And the central sill lower cover at assembling area B place is bending; Have bottom surface and folding surface, but the central sill lower cover width c1 at non-assembling zone C place is narrower and only have the bottom surface and do not carry out bending.
Wherein, The central sill at assembling area B place and the package assembly of sleeper beam can be referring to shown in Figure 4; Central sill 31 with the assembling mode of sleeper beam 32 does; At assembling area B place, an end of formation the 3rd spacing 24 of body bolster diaphragm 23 is inserted along the direction of arrow shown in Fig. 4, make first spacing, 14 corresponding matching of the 3rd spacing 24 and central sill.In the practical implementation; The reservation amount, the upper and lower cover plate single-piece of central sill is set usually, to increase the insertion space of sleeper beam and central sill, promptly when making; Do not carry out bending in the mill during the beam lower cover; Make the central sill lower cover only have bottom surface 121 and folding surface 122 is not set, the perhaps very little angle of a bending, body bolster diaphragm 23 is directly inserted by middle beam sides along the direction of arrow then; After sleeper beam and central sill assembling completion, carry out the flame beating again and simmer system, make the central sill lower cover be bent into folding surface shown in Figure 1 122.
The technological deficiency that above-mentioned prior art exists is: the mode that flame is simmered system not only increases extra work amount and cost, and packaging efficiency is very low; And the subregion stress of central sill lower cover increases after flame heat, and quality seriously reduces, and influences the performance of whole central sill and even body frame.
Summary of the invention
The purpose of this invention is to provide a kind of central sill of railway freight-car underframe and the assemble method of sleeper beam, simmer the assembling that the mode of making realizes central sill and sleeper beam, improve packaging efficiency and quality not adopt flame.
The present invention provides a kind of central sill of railway freight-car underframe and the assemble method of sleeper beam, and said central sill comprises and being used for and the assembling zone of said sleeper beam assembling and the non-assembling zone outside the said assembling zone; Said assemble method comprises:
Make central sill parts and sleeper beam parts, said central sill parts comprise said central sill upper cover plate, central sill lower cover, and said sleeper beam parts comprise said sleeper beam upper cover plate, sleeper beam lower cover and body bolster diaphragm; Wherein, the central sill lower cover that the assembling of said central sill is regional is suppressed bending, make said central sill lower cover have the bottom surface and press folding surface highly with preset folding;
Said central sill parts are connected and welded is central sill, and said sleeper beam parts are connected and welded is sleeper beam;
In the non-assembling zone of said central sill,, the body bolster diaphragm of said sleeper beam is inserted between central sill upper cover plate and the central sill lower cover of said central sill to assembled state by the side of said central sill;
Along said central sill, said sleeper beam is moved to said assembling zone by said non-assembling zone; And said sleeper beam is connected fixing with central sill.
The central sill of railway freight-car underframe of the present invention and the assemble method of sleeper beam; Through sleeper beam is inserted by the non-assembling zone of central sill; Move to the assembling zone again; Can an assembled formation, solve flame and simmered the low and ropy problem of system mode efficient, improved the packaging efficiency and the quality of central sill and sleeper beam.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do one to the accompanying drawing of required use in embodiment or the description of the Prior Art below introduces simply; Obviously, the accompanying drawing in describing below is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of the central sill in the prior art railway freight-car underframe;
Fig. 2 is the structural representation of the sleeper beam in the prior art railway freight-car underframe;
Fig. 3 is central sill and the package assembly sketch map one of sleeper beam in the prior art railway freight-car underframe;
Fig. 4 is central sill and the package assembly sketch map two of sleeper beam in the prior art railway freight-car underframe;
Fig. 5 is the schematic flow sheet of the assemble method embodiment of the central sill of railway freight-car underframe of the present invention and sleeper beam;
Fig. 6 is the assembling sequence sketch map of the assemble method embodiment of the central sill of railway freight-car underframe of the present invention and sleeper beam.
Description of reference numerals:
The specific embodiment
For making the object of the invention, technical scheme and advantage clearer; To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention carried out clear, intactly description, obviously; Described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, the every other embodiment that those of ordinary skills are obtained under the prerequisite of not making creative work belongs to the scope that the present invention protects.
Main technical schemes of the present invention is when making the central sill parts, the central sill lower cover that the assembling of said central sill is regional to be suppressed bending; Said central sill parts are connected and welded is central sill, and said sleeper beam parts are connected and welded is sleeper beam; With the body bolster diaphragm of sleeper beam, the position in the non-assembling zone of central sill is inserted between central sill upper cover plate and the central sill lower cover to assembled state by the side of central sill; Then, sleeper beam is moved to the assembling zone along central sill by non-assembling zone; Again sleeper beam is connected fixing with central sill.Above-mentioned assembling mode makes the central sill lower cover before assembling, just be made into preset bending-like, does not need follow-up flame to simmer the system step, has improved packaging efficiency and assembling quality.
Through accompanying drawing and specific embodiment, technical scheme of the present invention is done further detailed description below.
Fig. 5 is the central sill of railway freight-car underframe of the present invention schematic flow sheet with the assemble method embodiment of sleeper beam, and this method for example can be applied to the railway freight-car underframe of 40T axle weight; For making present embodiment clearer, can combine Fig. 1～Fig. 4 referring to the front to the explanation of assemble method.As shown in Figure 5, this method can may further comprise the steps:
Wherein, the central sill parts comprise central sill upper cover plate 11, central sill lower cover 12 and middle web 13, and middle web 13 is connected with central sill upper cover plate 11, central sill lower cover 12 respectively, and web 13 all exists in assembling zone and non-assembling zone in this.The sleeper beam parts comprise sleeper beam upper cover plate 21, sleeper beam lower cover 22 and body bolster diaphragm 23, and this body bolster diaphragm 23 is arranged between sleeper beam upper cover plate 21, the sleeper beam lower cover 22.
In the present embodiment,, adopt numerical control device to make described parts in order to improve the accuracy of manufacture of parts.For example, adopt the numerical control device cutting stock, make central sill upper cover plate, central sill lower cover, middle web etc.Through improving the accuracy of manufacture of parts, guarantee the reasonable technology dimensional tolerance of its each key position, can basic guarantee be provided for follow-up assembling, also be the key of overall package quality.
In the present embodiment, central sill comprises assembling area B and non-assembling zone C, and this assembling area B refers to the zone that is used for the sleeper beam assembling, the zone outside the assembling area B that non-assembling zone C is meant.During the beam lower cover, for the central sill lower cover at assembling area B place, can utilize the side of large tonnage pressing machine compacting central sill lower cover in the mill, make its bending form folding surface 122, this folding surface 122 has preset folding and presses height; This folding is pressed and highly is the L1 shown in Fig. 1.When compacting, also to guarantee the flatness of the bottom surface 121 of central sill lower cover.
That is, present embodiment is when the central sill lower cover is made, and directly it is manufactured preset bending-like, rather than as described in the prior art, temporarily during the beam lower cover in the mill do not carry out earlier bending, but after waiting the assembling sleeper beam to accomplish again flame simmer the system bending.Identical in the central sill lower cover at non-assembling zone C place and prior art, owing to need not assemble sleeper beam, there is not folding surface so have only the bottom surface.Through directly suppressing bending during fabrication, simmer the system wrap direction with respect to flame of the prior art, can the quality of central sill lower cover not impacted, significantly improve the quality of central sill lower cover, and then improved the quality of central sill and whole assembling.
Further, in the present embodiment, during the beam upper cover plate, can be formed for the deformation of balance welding deformation amount in the mill at the connecting portion of central sill upper cover plate.Concrete, this connecting portion refers to the outside with middle web junction, the folding surface side of the corresponding central sill lower cover in the said outside, and this connecting portion can be referring to the zone of the S shown in Fig. 1; The above-mentioned deformation that is used for the balance welding deformation amount refers to; Central sill upper cover plate subsequent step will produce welding deformation in above-mentioned S zone when welding with middle web, be generally reclinate shape; Be similar to " eight " font, rather than plane shown in Fig. 1; For the balance welding deformation amount; Can when this step is made the central sill upper cover plate, the S zone in the upper cover plate be provided with deformation, for example can upper cover plate be projected upwards; So that in when welding, the upper cover plate that projects upwards takes place to become just after the downward deformation plane.Through above-mentioned welding anti-distortion setting, can effectively control and reduce the welding deformation of central sill upper cover plate, guarantee its dimensional accuracy.
Further, central sill has a centre porose central sill lower cover is set, in the mill during beam; Eight rivets are set on the bottom surface 121 of this central sill lower cover 12 usually; The rivet at edge can be called fastening rivet 34, referring to shown in Figure 3, add up to four fastening rivet 34 and all is arranged on the outside; Other four rivets 33 are arranged on the inboard of central sill, are used for connecting central sill lower cover and body center plate.In the present embodiment; Because sleeper beam need pass through fastening rivet 34 and move to the assembling zone in the subsequent step when assembling; In order to guarantee moving smoothly of sleeper beam, make fastening rivet 34 can in the central sill manufacture process, can not rivet four rivets in centre of the above in this step earlier to the mobile obstacle that causes of sleeper beam; And four fastening rivet 34 temporary transient riveted joints earlier in the outside; It is fastening to use fastening bolt to carry out earlier, so that when sleeper beam is assembled, can easily fastening bolt be taken off, treats to rivet through fastening rivet 34 after the sleeper beam assembling again; Perhaps, can select from the right side or assemble in the left side according to actual conditions, only confirm that promptly 2 rivets of a side utilize bolt to substitute, all the other 6 rivets can be riveted earlier.
In addition, compared with prior art, lower cover mode of heating used in the prior art; Because the position that rivet pitch is simmered system from flame is very near, also with the heat transferred rivet, heating can cause rivet fragility to increase in to heating; Rivet force reduces, and influences riveting quality; And present embodiment no longer adopts mode of heating, thereby can avoid the quality influence to rivet, improves rivet force and assembling quality.
Wherein, in step 501, after the manufacturing of completion parts, need the parts assembling be welded as central sill or sleeper beam; The quality of this sleeper beam and central sill is directly determining the quality of follow-up assembling, and therefore welding also needs strict control accuracy in this step.
For example, for guaranteeing group in sleeper beam, the central sill welding process to the gap, it is right to adopt special-purpose group that anchor clamps are organized, to guarantee the critical size and the characteristic of central sill or sleeper beam; Wherein, welding refers to, and for example, it is right that central sill upper cover plate, central sill lower cover and middle web are organized, and be welded as central sill; Group refers to the gap, for example, and the gap of connection between central sill upper cover plate and middle web when welding is accomplished.
In the practical implementation; Be provided with two body bolster diaphragms 23 paralleling (can referring to two body bolster diaphragms 23 shown in the black dotted lines among Fig. 3) between the sleeper beam upper cover plate of sleeper beam, the sleeper beam lower cover; Need two body bolster diaphragms of adjustment; Make the front end alignment (this front end refers to the end with the 3rd spacing 24 of web, and this front end is used to insert central sill) of these two body bolster diaphragms, promptly the distance L 2 with respect to sleeper beam upper cover plate front end equates (L2 can referring to Fig. 2); And; The upper and lower surfaces of the front end of these two body bolster diaphragms 23 also need concordant respectively (referring to upper surface a1 among Fig. 2 and lower surface a2); To guarantee to insert in the central sill; Because the 3rd spacing 24 that this front end has is first spacing, 14 corresponding matching with central sill; If the upper and lower surfaces of the front end of two body bolster diaphragms 23 is not concordant but staggered, then the spacing of the highest upper surface of these two body bolster diaphragm 23 front ends and minimum lower surface is inevitable greater than the 3rd spacing 24, will make these two webs not insert in the central sill.In addition, the entire length of sleeper beam also will meet preset value; The middle web of central sill also need be vertical respectively with the central sill lower cover with the central sill upper cover plate.
Further; The central sill parts are organized to after; Before the welding, can the central sill upper cover plate and the central sill lower cover between support member (this support member is not shown, roughly is arranged in the position of first spacing 14 of Fig. 1) is set; This support member can be controlled the deflection of central sill upper cover plate when welding, reduce its welding deformation.
Further, for the package size that guarantees sleeper beam is to be complementary with central sill, improve the quality of central sill when welding; In this step, can with sleeper beam parts group to after, before the welding; Sleeper beam inserted in the beam model be used for testing assemble in advance, to detect the package size of sleeper beam.Wherein, middle beam model is the model that has same size with real central sill.
Wherein, referring to Fig. 1 and Fig. 2, clearly, therefore the 3rd spacing 24 of body bolster diaphragm, is can not be such according to the method for prior art greater than second spacing 15 in the central sill, direct-insert by the side in assembling zone.
In the present embodiment; Referring to Fig. 6; Fig. 6 is the assembling sequence sketch map of the assemble method embodiment of the central sill of body frame of the present invention and sleeper beam; Non-assembling in that corresponding " position 1 " located is regional, by the side of central sill sleeper beam is inserted, and this side refers to the side along its length of central sill; Sleeper beam specifically is that the front end with body bolster diaphragm 23 is inserted into up and down between the cover plate of central sill when inserting central sill, makes the assembled state of the applying promptly formation of two opposite edges edge sleeper beam and central sill of sleeper beam upper cover plate and central sill upper cover plate up and down between the cover plate through body bolster diaphragm 23 being inserted central sills.Because the central sill lower cover in non-assembling zone is only to have the bottom surface, does not have bending, so body bolster diaphragm can insert entering easily; And, being inserted into assembled state, this assembled state refers to state as shown in Figure 4, and difference is that just the central sill lower cover in non-assembling zone does not have bending in this step; For example, when assembled state, the right-hand member of the central sill upper cover plate shown in Fig. 1 can be fitted with the left end of the sleeper beam upper cover plate shown in Fig. 2 and contacted, and body bolster diaphragm is inserted into up and down between the cover plate of central sill.
Then, along central sill, sleeper beam is moved to the assembling zone by non-assembling zone.Wherein, when moving sleeper beam, up and down between the cover plate of central sill can be got into smoothly in the assembling zone, parallel moving can be carried out, to keep the assembled state in the step 503 constant in order to guarantee sleeper beam.In the practical implementation; Can below sleeper beam, fixedly install a carriage 35; This carriage 35 can be fixed on the special equipment that is used to assemble central sill and sleeper beam, as long as sleeper beam is placed on this carriage 35, and it is regional to move to assembling along carriage 35 by non-assembling zone; The angle that just can keep parallel the moving of sleeper beam and make it be in assembled state is constant, between the entering central sill upper cover plate that just can be more or less freely when the assembling of sleeper beam arrival central sill is regional like this and the central sill lower cover of bending.
In the present embodiment, can be before moving sleeper beam, the fastening bolt of central sill being assembled location takes off, and stops moving of sleeper beam to avoid fastening bolt; After treating that sleeper beam moves to this assembling zone and puts in place; Utilize bolt will insert a side two bolted earlier, carry out size detection subsequently, can assemble adjustment according to the size of sleeper beam and central sill; After the gap of sleeper beam and central sill, the bulk of sleeper beam are all qualified; Sleeper beam and central sill are welded, again the position of fastening bolt is replaced with rivet after welding is accomplished, sleeper beam and central sill are carried out riveted and fixed.
Further, sleeper beam is connected with central sill fixing after, can also be with the curb girder in the body frame, is connected fixingly with the side of sleeper beam, an end of this side and sleeper beam insertion central sill is relative, this side can be referring to the F shown in Fig. 6.Can retrain the relative position of sleeper beam and central sill through curb girder, sleeper beam is further reinforced, make that the assembling of central sill and sleeper beam is more firm.
The central sill of present embodiment and the assemble method of sleeper beam; Through sleeper beam is inserted by the non-assembling zone of central sill, move to the assembling zone again, can an assembled formation; Solve flame and simmered the low and ropy problem of system mode efficient, improved the packaging efficiency and the quality of central sill and sleeper beam.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be accomplished through the relevant hardware of programmed instruction; Aforesaid program can be stored in the computer read/write memory medium; This program the step that comprises said method embodiment when carrying out; And aforementioned storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
What should explain at last is: above embodiment is only in order to explaining technical scheme of the present invention, but not to its restriction; Although with reference to previous embodiment the present invention has been carried out detailed explanation, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these are revised or replacement, do not make the spirit and the scope of the essence disengaging various embodiments of the present invention technical scheme of relevant art scheme.
Claims (9)
1. the assemble method of the central sill of a railway freight-car underframe and sleeper beam, said central sill comprise be used for and the assembling zone and the non-assembling outside the said assembling zone of the assembling of said sleeper beam regional, it is characterized in that said assemble method comprises:
Make central sill parts and sleeper beam parts, said central sill parts comprise said central sill upper cover plate, central sill lower cover, and said sleeper beam parts comprise said sleeper beam upper cover plate, sleeper beam lower cover and body bolster diaphragm; Wherein, the central sill lower cover that the assembling of said central sill is regional is suppressed bending, make said central sill lower cover have the bottom surface and press folding surface highly with preset folding;
Said central sill parts are connected and welded is central sill, and said sleeper beam parts are connected and welded is sleeper beam;
In the non-assembling zone of said central sill,, the body bolster diaphragm of said sleeper beam is inserted between central sill upper cover plate and the central sill lower cover of said central sill to assembled state by the side of said central sill;
Along said central sill, said sleeper beam is moved to said assembling zone by said non-assembling zone; And said sleeper beam is connected fixing with central sill.
2. the assemble method of the central sill of body frame according to claim 1 and sleeper beam is characterized in that, said manufacturing central sill parts and sleeper beam parts comprise:
Adopt numerical control device to make said central sill parts and sleeper beam parts.
3. the assemble method of the central sill of body frame according to claim 1 and sleeper beam is characterized in that, said manufacturing central sill parts also comprise:
Be formed for the deformation of balance welding deformation amount at the connecting portion of said central sill upper cover plate, said connecting portion be said central sill upper cover plate and said in the outside of web junction, the folding surface side of the corresponding said central sill lower cover in the said outside.
4. the assemble method of the central sill of body frame according to claim 1 and sleeper beam is characterized in that, with said sleeper beam parts group to after, be welded as before the sleeper beam, also comprise:
Said sleeper beam inserted in the beam model that is used for testing assembles in advance, the package size that detects said sleeper beam whether with said in beam model be complementary; Beam model and said central sill have same size in said.
5. the assemble method of the central sill of body frame according to claim 1 and sleeper beam is characterized in that, said central sill parts are organized to after, be welded as before the central sill, also comprise:
Between said central sill upper cover plate and central sill lower cover, support member is set.
6. the assemble method of the central sill of body frame according to claim 1 and sleeper beam is characterized in that, is provided with two body bolster diaphragms that parallel between the sleeper beam upper cover plate of said sleeper beam, the sleeper beam lower cover; Said that said sleeper beam parts group is right, comprising:
Adjust said two body bolster diaphragms, make that the front end of said two body bolster diaphragms is equal with respect to the distance of said sleeper beam upper cover plate front end, and the upper and lower surfaces of the front end of said two body bolster diaphragms is concordant respectively; The front end of said body bolster diaphragm is used to insert said central sill.
7. the assemble method of the central sill of body frame according to claim 1 and sleeper beam is characterized in that, saidly along central sill said sleeper beam is moved to said assembling zone by said non-assembling zone, comprising:
Take off the fastening bolt of the assembling location of said central sill;
Along said central sill, said sleeper beam is moved to said assembling zone by said non-assembling zone;
Said sleeper beam and central sill are carried out riveted and fixed.
8. the assemble method of the central sill of body frame according to claim 1 and sleeper beam is characterized in that, said sleeper beam is connected with central sill fixing after, also comprise:
With the curb girder in the said body frame, be connected fixingly with the side of said sleeper beam, the end that said side and said sleeper beam insert said central sill is relative.
9. the assemble method of the central sill of body frame according to claim 1 and sleeper beam is characterized in that, said sleeper beam is moved to said assembling zone by said non-assembling zone, comprising:
Sleeper beam along carriage, is moved to said assembling zone by said non-assembling zone, and said carriage is arranged on the below of said sleeper beam.
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| CN201110229577.6A CN102390014B (en) | 2011-08-11 | 2011-08-11 | Assembling method for centre sill and body bolster of underframe of railway wagon |
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| CN201110229577.6A CN102390014B (en) | 2011-08-11 | 2011-08-11 | Assembling method for centre sill and body bolster of underframe of railway wagon |
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| CN106514028A (en) * | 2016-12-15 | 2017-03-22 | 中车北京二七车辆有限公司 | Welding method for five-axis bogie welding framework side frame of bridge girder erection machine |
| CN110899901A (en) * | 2019-11-22 | 2020-03-24 | 中车长江车辆有限公司 | Assembly welding method for truck chassis |
| CN114012309A (en) * | 2021-10-11 | 2022-02-08 | 中车长江车辆有限公司 | Assembling method of transport vehicle frame |
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| CN104097652A (en) * | 2013-04-12 | 2014-10-15 | 齐齐哈尔轨道交通装备有限责任公司 | Rail wagon middle beam, rail wagon and rail wagon beam frame assembling method |
| CN104097652B (en) * | 2013-04-12 | 2016-05-11 | 齐齐哈尔轨道交通装备有限责任公司 | Railway freight-car central sill, railway freight-car and roof beam structure assemble method thereof |
| CN103639696A (en) * | 2013-11-29 | 2014-03-19 | 南车长江车辆有限公司 | Assembling equipment and assembling method for railway truck four-connecting-rod bottom door hopper opening mechanism |
| CN103639696B (en) * | 2013-11-29 | 2016-02-03 | 南车长江车辆有限公司 | Rail freight double leval jib bottom door bell mouth mechanism's mounting equipment and assemble method |
| CN104227257A (en) * | 2014-07-29 | 2014-12-24 | 南车长江车辆有限公司 | Assembling and welding method for controlling distortion of center sill of thick plate assembled and welded box type structure of rail wagon |
| CN106514028A (en) * | 2016-12-15 | 2017-03-22 | 中车北京二七车辆有限公司 | Welding method for five-axis bogie welding framework side frame of bridge girder erection machine |
| CN106514028B (en) * | 2016-12-15 | 2019-02-12 | 中车北京二七车辆有限公司 | A kind of welding method of Bridge Erector five-axle steering frame welded frame side frame |
| CN110899901A (en) * | 2019-11-22 | 2020-03-24 | 中车长江车辆有限公司 | Assembly welding method for truck chassis |
| CN114012309A (en) * | 2021-10-11 | 2022-02-08 | 中车长江车辆有限公司 | Assembling method of transport vehicle frame |
| CN114012309B (en) * | 2021-10-11 | 2024-02-13 | 中车长江车辆有限公司 | Assembling method of transportation frame |
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| CN102390014B (en) | 2014-10-29 |
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