CN113427216B - Machining method for car body door frame structure of railway vehicle - Google Patents
Machining method for car body door frame structure of railway vehicle Download PDFInfo
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- CN113427216B CN113427216B CN202110769531.7A CN202110769531A CN113427216B CN 113427216 B CN113427216 B CN 113427216B CN 202110769531 A CN202110769531 A CN 202110769531A CN 113427216 B CN113427216 B CN 113427216B
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- door frame
- door
- main body
- frame structure
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- 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
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T30/00—Transportation of goods or passengers via railways, e.g. energy recovery or reducing air resistance
Abstract
The invention provides a machining method of a car body door frame structure of a railway vehicle. The processing method of the vehicle body door frame structure of the railway vehicle comprises the following steps: blanking: blanking stainless steel raw materials to obtain a door frame main body and a door corner; a molding step: when the inner diameter of the door corner is larger than or equal to a preset value, bending and forming the door frame main body and punching and forming the door corner, and when the inner diameter of the door corner is smaller than the preset value, rolling, stretching and bending the door frame main body; a welding step: and welding the door corner with the door frame main body to finish the preparation of the car body door frame structure. The invention solves the problem of lower structural strength of the car body door frame of the railway vehicle in the prior art.
Description
Technical Field
The invention relates to the technical field of railway vehicles, in particular to a machining method of a vehicle body door frame structure of a railway vehicle.
Background
At present, rail vehicle's automobile body door frame structure generally is the aluminum alloy material, and current stainless steel automobile body generally adopts screw fastening mode installation aluminum alloy material door frame, and its intensity is less strong, can't participate in the structure and bear, for solving stress concentration problem, welds cast steel door corner reinforcement at door four corners usually, causes the regional wallboard of door corner to warp etc. secondary problem easily. In addition, the aluminum alloy door frame and the stainless steel car body have color difference in appearance, and the appearance quality of the whole car is affected. Moreover, because there is the electrode potential difference between aluminum alloy door frame and the automobile body steel construction, in order to avoid electrochemical corrosion, need coat zinc phosphate priming paint in the overlap joint face of the two in order to corrode the protection.
From the above, the problem that the structural strength of the car body door frame of the railway car is low exists in the prior art.
Disclosure of Invention
The invention mainly aims to provide a processing method of a vehicle body door frame structure of a railway vehicle, and aims to solve the problem that the strength of the vehicle body door frame structure of the railway vehicle is low in the prior art.
In order to achieve the above object, the present invention provides a method of processing a vehicle body door frame structure of a railway vehicle, the vehicle body door frame structure including a door frame main body and a door corner, the method of processing the vehicle body door frame structure of the railway vehicle including: blanking: blanking stainless steel raw materials to obtain a door frame main body and a door corner; a molding step: when the inner diameter of the door corner is larger than or equal to a preset value, bending and forming the door frame main body and punching and forming the door corner, and when the inner diameter of the door corner is smaller than the preset value, rolling, stretching and bending the door frame main body; a welding step: and welding the door corner with the door frame main body to finish the preparation of the car body door frame structure.
Further, in the blanking step, when the inner diameter of the door corner is larger than or equal to a preset value, the door frame main body is split into independent multiple sections and respectively blanked, so that the multiple sections of the door frame main body are respectively welded with the door corner in the welding step.
Further, in the blanking step, when the inner diameter of the door corner is smaller than a preset value, the door frame main body is blanked integrally.
Further, the molding step further comprises: when the inner diameter of the door corner is larger than or equal to a preset value, the door frame main body is bent and molded, and then the door frame main body is subjected to arc pressing treatment.
Further, in the blanking step, the roll bending forming of the door frame main body includes: and rolling the door frame main body, then forming a notch part for accommodating a door corner at the corner of the door frame main body, and bending and forming the corner of the door frame main body.
Further, in the welding step, welding the door corner to the door frame body includes: and placing the door corner and the door frame main body in a welding tool, and carrying out arc welding or laser welding on the door corner and the door frame main body.
Further, the preset value is 90mm to 110 mm.
Further, the machining method of the door frame structure of the vehicle body of the railway vehicle further comprises a polishing step, and the polishing step comprises the following steps: and (4) grinding the welding seam of the car body door frame structure to be flat, and then polishing the car body door frame structure.
Further, after the polishing step, the method for processing the door frame structure of the vehicle body of the railway vehicle further comprises a wire drawing step, wherein the wire drawing step comprises the following steps of: and performing wire drawing treatment on the car body door frame structure along the width direction of the door frame main body.
Further, after the wire drawing step, the method for processing the door frame structure of the car body of the railway car further comprises a passivating step, wherein the passivating step comprises the following steps: and carrying out oxidation treatment on the car body door frame structure by using an electrochemical method so as to passivate the surface of the car body door frame structure.
By applying the technical scheme of the invention, the car body door frame structure comprises a door frame main body and a door corner, and the processing method of the car body door frame structure of the railway vehicle comprises the following steps: blanking: blanking stainless steel raw materials to obtain a door frame main body and a door corner; a forming step: when the inner diameter of the door corner is larger than or equal to a preset value, bending and forming the door corner, and when the inner diameter of the door corner is smaller than the preset value, rolling, stretching and bending the door frame main body; a welding step: with door angle and door frame main part welding, accomplish preparation automobile body door frame structure, select the material of stainless steel as automobile body door frame structure like this, make automobile body door frame structure can directly participate in the structure and bear, and need not the reinforcement of door frame corner, avoid secondary problems such as welding deformation, and select different shaping methods according to the size of the internal diameter of door angle, make the internal diameter of door angle also can make the smooth shaping of door frame main part when being less than the default, the structural strength of the door frame main part of unidimensional has not been guaranteed, and then the overall structure intensity of automobile body door frame structure has been guaranteed, the lower problem of rail vehicle's automobile body door frame structural strength among the prior art has been solved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 shows a flow chart of a method of machining a door frame structure of a body of a rail vehicle in an embodiment of the invention;
FIG. 2 is a schematic structural view of a stamped and bent formed vehicle body door frame structure in an exemplary embodiment of the invention;
fig. 3 shows a partial enlarged view at a in fig. 2;
figure 4 shows a schematic view of a roll stretch-formed door frame structure of a vehicle body in an embodiment of the invention.
Wherein the figures include the following reference numerals:
10. a doorframe main body; 20. a door corner.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
In the present invention, unless specified to the contrary, use of the terms of orientation such as "upper, lower, top, bottom" or the like, generally refer to the orientation as shown in the drawings, or to the component itself in a vertical, perpendicular, or gravitational orientation; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the invention.
The invention provides a machining method of a car body door frame structure of a railway vehicle, aiming at solving the problem that the car body door frame structure of the railway vehicle in the prior art is low in strength.
As shown in fig. 2 and 4, the door frame structure of the vehicle body includes a door frame main body 10 and a door corner 20.
As shown in fig. 1, the method for processing a door frame structure of a vehicle body of a railway vehicle includes: blanking: blanking stainless steel raw materials to obtain a door frame main body 10 and a door corner 20; a forming step: when the inner diameter of the door corner 20 is larger than or equal to a preset value, bending and forming the door frame main body 10 and punching and forming the door corner 20, and when the inner diameter of the door corner 20 is smaller than the preset value, rolling, stretching and bending the door frame main body 10; a welding step: and welding the door corner 20 with the door frame main body 10 to finish the preparation of the car body door frame structure.
Through the processing method of the car body door frame structure of the railway vehicle, stainless steel raw materials are blanked in a blanking step to obtain the door frame main body 10 and the door corner 20, when the inner diameter of the door corner 20 is larger than or equal to a preset value in a forming step, the door frame main body 10 is bent and formed, the door corner 20 is punched and formed, when the inner diameter of the door corner 20 is smaller than the preset value, the door frame main body 10 is rolled, pulled and bent and formed, the door corner 20 is welded with the door frame main body 10 in a welding step, and the car body door frame structure is prepared, so that the stainless steel is selected as the material of the car body door frame structure, the car body door frame structure can directly participate in structural bearing, the reinforcement of door frame corners is not needed, secondary problems such as welding deformation are avoided, different forming methods are selected according to the inner diameter of the door corner 20, and the door frame main body 10 can be smoothly formed when the inner diameter of the door corner 20 is smaller than the preset value, the structural strength of the door frame main body 10 of different sizes is ensured, and the overall structural strength of the door frame structure of the vehicle body is further ensured.
It should be noted that the inner diameter of the door corner is determined when the door frame structure for a vehicle body in the present embodiment is prepared. The comparison of the inner diameter of the door angle with the preset value is carried out on the premise that the inner diameter of the door angle is determined. That is, the door frame structure of the vehicle body required by different vehicle models is different, and the size of the door corner of the corresponding door frame structure of the vehicle body is also different. Therefore, different forming modes are selected according to the inner diameter of the door corner, so that the vehicle body door frame structure under each size can be formed smoothly, and the structural strength is guaranteed.
In the door frame structure of the vehicle body according to the present embodiment, the door frame body 10 and the door corner 20 are made of stainless steel. Like this automobile body door frame structure and rail vehicle's automobile body the material is the same, can with the automobile body permanent connection, can not produce electrochemical corrosion between and the automobile body, increased rail vehicle's life, reduced the operation maintenance cost.
As shown in fig. 3, the inside diameter of the door corner is R. That is, the inside diameter of the door corner is the radius of the circle on which the arc inside the door corner lies. In the present embodiment, the preset value is 90mm to 110 mm. When the inner diameter R of the door corner is smaller than the preset value, the door frame main body cannot be formed through punching.
In this embodiment, in the blanking step, when the inner diameter of the door corner 20 is greater than or equal to the preset value, the door frame main body 10 is separated into independent multiple sections and respectively blanked, so that in the welding step, the multiple sections of the door frame main body 10 are respectively welded with the door corner 20. Specifically, a plurality of sections of the door frame body 10 are blanked by laser cutting. As shown in fig. 2, the doorframe main body 10 includes four independent sections, four door corners 20 are provided, and the four door corners 20 are respectively provided at four corners of the doorframe main body 10. Each independent section of the doorframe main body 10 is welded to one end of two adjacent door corners 20.
In the present embodiment, in the blanking step, when the inner diameter of the door corner 20 is less than a preset value, the doorframe main body 10 is blanked integrally. That is, when the inner diameter of the door corner 20 is smaller than the predetermined value, the door frame body 10 after being blanked is still a whole and is not separated into a plurality of parts. In addition, when the inner diameter of the door angle 20 is smaller than the preset value, the door angle 20 is still blanked by means of laser cutting.
In this embodiment, the molding step further includes: when the inner diameter of the door corner 20 is greater than or equal to a preset value, the door frame main body 10 is bent and molded, and then the door frame main body 10 is subjected to arc pressing treatment. Specifically, after the multi-section blanking of the door frame main body 10 is completed, a press machine is used for matching with the bending prop to complete the multi-section bending forming of the door frame main body 10, finally, the specific profile degree of the door frame main body 10 is prepared through an arc pressing process, and finally, the press machine is used for matching with a die to complete the punch forming of the door corner 20.
In this embodiment, in the blanking step, the roll stretch-bending forming of the door frame body 10 includes: the door frame body 10 is rolled, and then a notch portion for accommodating the door corner 20 is formed at a corner of the door frame body 10, and the corner of the door frame body 10 is formed by stretch bending. Specifically, the door frame body 10 is manufactured into an L-shaped profile by rolling, and then the notch portion at the corner is processed according to the size of the door of the rail vehicle. The four corners of the door frame main body 10 are subjected to stretch bending forming through stretch bending equipment and a die, and finally the regional shapes of the four corners are trimmed through the modes of wire cutting, milling, three-dimensional laser cutting and the like, so that the rolling stretch bending forming of the door frame main body 10 is completed. That is, when the inner diameter of the door corner 20 is smaller than the preset value, as shown in fig. 4, the door frame main body 10 is a whole after being formed by rolling, bending and bending, and has notch portions at four corners, the four door corners 20 are respectively accommodated at the notch portions of the four corners, and then the four door corners 20 are welded to the door frame main body 10.
In the present embodiment, the welding the door corner 20 and the doorframe main body 10 in the welding step includes: the door corner 20 and the door frame body 10 are placed in a welding tool, and arc welding or laser welding is performed on the door corner 20 and the door frame body 10. Through using the welding frock, can be spacing with door angle 20 and door frame main part 10, guarantee the welded accuracy, also prevent among the welding process door angle 20 or door frame main part 10 to take place to remove and cause the threat to staff's personal safety. In addition, after the welding is completed, the excess wing edges of the welding portion need to be removed by the three-dimensional laser.
In this embodiment, the method for processing a door frame structure of a vehicle body of a railway vehicle further comprises a polishing step, the polishing step comprising: and (4) grinding the welding seam of the car body door frame structure to be flat, and then polishing the car body door frame structure.
In this embodiment, after the polishing step, the method for processing a door frame structure of a vehicle body of a railway vehicle further includes a wire drawing step including: the vehicle body door frame structure is subjected to a wire drawing process in the width direction of the door frame main body 10. By carrying out wire drawing treatment on the car body door frame structure, the appearance of the car body door frame structure is consistent with that of a car body of a railway vehicle, and the car body door frame structure has good overall appearance consistency.
In this embodiment, after the wire drawing step, the method for processing a door frame structure of a vehicle body of a railway vehicle further comprises a passivating step, wherein the passivating step comprises: and carrying out oxidation treatment on the car body door frame structure by using an electrochemical method so as to passivate the surface of the car body door frame structure. Through carrying out passivation treatment to automobile body door frame structure, prevent that rail vehicle from suffering electrochemical corrosion, improve corrosion resisting property, and then guarantee life.
In this embodiment, after the welding step, the method for processing a door frame structure of a vehicle body of a railway vehicle further includes a boring step, the boring step including: the bottom of the door frame body 10 is provided with a plug welding hole. This can provide convenience for the next welding installation.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects: through the processing method of the car body door frame structure of the railway vehicle, stainless steel raw materials are blanked in a blanking step to obtain the door frame main body 10 and the door corner 20, when the inner diameter of the door corner 20 is larger than or equal to a preset value in a forming step, the door frame main body 10 is bent and formed, the door corner 20 is punched and formed, when the inner diameter of the door corner 20 is smaller than the preset value, the door frame main body 10 is rolled, pulled and bent and formed, the door corner 20 is welded with the door frame main body 10 in a welding step, and the car body door frame structure is prepared, so that the stainless steel is selected as the material of the car body door frame structure, the car body door frame structure can directly participate in structural bearing, the reinforcement of door frame corners is not needed, secondary problems such as welding deformation are avoided, different forming methods are selected according to the inner diameter of the door corner 20, and the door frame main body 10 can be smoothly formed when the inner diameter of the door corner 20 is smaller than the preset value, the structural strength of the door frame main body 10 of different sizes is ensured, and the overall structural strength of the door frame structure of the vehicle body is further ensured.
It is to be understood that the above-described embodiments are only a few, but not all, embodiments of the present invention. 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.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the accompanying drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A method for processing a vehicle body door frame structure of a railway vehicle, which is characterized by comprising a door frame main body (10) and a door corner (20), the method comprising:
blanking: blanking stainless steel raw materials to obtain the door frame main body (10) and the door corner (20);
a molding step: when the inner diameter of the door corner (20) is larger than or equal to a preset value, bending and forming the door frame main body (10) and punching and forming the door corner (20), and when the inner diameter of the door corner (20) is smaller than the preset value, rolling, bending and forming the door frame main body (10);
a welding step: and welding the door corner (20) with the door frame main body (10) to finish the preparation of the vehicle body door frame structure.
2. The method for processing a door frame structure of a vehicle body of a railway vehicle as claimed in claim 1, wherein in the blanking step, when the inner diameter of the door corner (20) is equal to or greater than the predetermined value, the door frame main body (10) is divided into independent multiple sections and blanked, so that in the welding step, the multiple sections of the door frame main body (10) are welded to the door corner (20), respectively.
3. The processing method of a vehicle body door frame structure of a railway vehicle according to claim 1, wherein in the blanking step, when the inner diameter of the door corner (20) is smaller than the preset value, the door frame main body (10) is blanked integrally.
4. The method of machining a vehicle body door frame structure of a railway vehicle as claimed in claim 1, wherein the forming step further comprises:
when the inner diameter of the door corner (20) is larger than or equal to the preset value, the door frame main body (10) is bent and formed, and then arc pressing treatment is carried out on the door frame main body (10).
5. The machining method of a vehicle body door frame structure of a railway vehicle according to claim 1, wherein in the molding step, the roll-stretch-bending molding the door frame body (10) includes:
and rolling the door frame main body (10), then forming a notch part for accommodating the door corner (20) at the corner of the door frame main body (10), and bending and molding the corner of the door frame main body (10).
6. The machining method of a vehicle body door frame structure of a railway vehicle according to claim 1, wherein in the welding step, the welding the door angle (20) with the door frame main body (10) includes:
and placing the door corner (20) and the door frame main body (10) in a welding tool, and carrying out arc welding or laser welding on the door corner (20) and the door frame main body (10).
7. The processing method of a vehicle body door frame structure of a railway vehicle according to any one of claims 1 to 6, wherein the preset value is 90mm to 110 mm.
8. The method for processing a vehicle body door frame structure of a railway vehicle as claimed in any one of claims 1 to 6, further comprising a polishing step, the polishing step comprising:
and grinding the welding seam of the car body door frame structure to be flat, and then polishing the car body door frame structure.
9. The method of machining a vehicle body door frame structure of a railway vehicle of claim 8, wherein after the polishing step, the method of machining a vehicle body door frame structure of a railway vehicle further comprises a wire drawing step, the wire drawing step comprising:
and performing wire drawing treatment on the car body door frame structure along the width direction of the door frame main body (10).
10. The method of machining a vehicle body door frame structure of a railway vehicle of claim 9, wherein after the wire drawing step, the method of machining a vehicle body door frame structure of a railway vehicle further comprises a passivating step, the passivating step comprising:
and carrying out oxidation treatment on the car body door frame structure by using an electrochemical method so as to passivate the surface of the car body door frame structure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110769531.7A CN113427216B (en) | 2021-07-07 | 2021-07-07 | Machining method for car body door frame structure of railway vehicle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110769531.7A CN113427216B (en) | 2021-07-07 | 2021-07-07 | Machining method for car body door frame structure of railway vehicle |
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| CN113427216B true CN113427216B (en) | 2022-09-06 |
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| CN102099236A (en) * | 2009-03-30 | 2011-06-15 | 川崎重工业株式会社 | Railroad vehicle body structure and method of manufacturing same |
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| CN113427216A (en) | 2021-09-24 |
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