CN211543546U

CN211543546U - Railway vehicle bogie frame

Info

Publication number: CN211543546U
Application number: CN202020004937.7U
Authority: CN
Inventors: 田仁勇; 吴向阳; 李亚南; 张志毅; 马寅; 蔡卫星; 马征征; 李卓
Original assignee: CRRC Qingdao Sifang Co Ltd
Current assignee: CRRC Qingdao Sifang Co Ltd
Priority date: 2020-01-02
Filing date: 2020-01-02
Publication date: 2020-09-22
Anticipated expiration: 2030-01-02

Abstract

The utility model relates to a rail vehicle technical field provides a rail vehicle bogie framework, include a pair of box curb girder and connect in a pair of box crossbeam between the box curb girder, the box curb girder treat the welding point is treated to the box crossbeam, and the box curb girder with treat between the box crossbeam that the welding point all forms the welding seam through the high-frequency pulse MAG welding. The utility model discloses can make bogie frame welding seam of high quality, weld back structural strength height, welding efficiency greatly promotes moreover.

Description

Railway vehicle bogie frame

Technical Field

The utility model relates to a bogie frame welding technical field especially relates to rail vehicle bogie frame.

Background

The frame is one of the important parts of the bogie and is a mounting platform formed by all parts of the bogie, and the mounting platform is used for connecting all parts of the bogie and transmitting forces in all directions to keep the position of an axle on the bogie.

The existing bogie of the high-speed motor train unit has higher requirements on structural strength and equipment layout, and if the equipment layout and the structural strength are unreasonable, the running safety and the service life of a vehicle can be seriously influenced. Therefore, the bogie which is compact and reasonable in equipment arrangement and meets the running performance requirements of the motor train unit is very important.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a rail vehicle bogie framework, this bogie framework welding quality is good, and structural strength is high.

According to the utility model discloses rail vehicle bogie framework, include a pair of box curb girder and connect in a pair of box crossbeam between the box curb girder, the box curb girder treat the welding point of treating of box crossbeam, and the box curb girder with treat between the box crossbeam that the welding point all forms the welding seam through the high-frequency pulse MAG welding.

According to an embodiment of the invention, the weld comprises a backing weld layer and a filler, cap weld layer.

According to the utility model discloses an embodiment, the box curb girder with the box crossbeam all includes the polylith steel sheet, treats welded adjacent steel sheet butt joint groove angle is 30 degrees ~ 40 degrees.

According to the utility model discloses an embodiment, the box curb girder with the box crossbeam all includes the polylith steel sheet, treats welded adjacent clearance between the steel sheet is 0 ~ 1 mm.

According to an embodiment of the present invention, the arc of the high frequency pulse MAG welding is formed by the arc output by the IGBT inverter welder.

According to one embodiment of the present invention, the frequency of the high-frequency pulse MAG welding is 200 to 300 Hz.

According to the utility model discloses an embodiment, high-frequency pulse MAG welding forms the welding current of backing weld layer is 160 ~ 180A, high-frequency pulse MAG welding forms the welding current of filling, capping weld layer is 180 ~ 200A.

According to one embodiment of the utility model, the welding current of high-frequency pulse MAG welding formation backing weld layer is 17 ~ 19V, the welding current of high-frequency pulse MAG welding formation filling, capping weld layer is 18 ~ 20V; the welding speed of the high-frequency pulse MAG welding to form the backing weld layer is 30-35 cm/min, and the welding speed of the high-frequency pulse MAG welding to form the filling and capping weld layer is 30-35 cm/min.

According to an embodiment of the utility model, high-frequency pulse MAG welding forms the welding heat input of backing weld layer is 4.4 ~ 4.7kJ/cm, high-frequency pulse MAG welding forms the welding heat input of filling, facing weld layer is 5.2 ~ 5.5 kJ/cm.

According to the utility model discloses an embodiment, the both sides of box crossbeam be equipped with respectively one with the box crossbeam is parallel and the auxiliary beam who is connected respectively with a pair of box curb girder, the auxiliary beam with treat between the box curb girder that the welding department passes through high-frequency pulse MAG welds and forms the welding seam.

The embodiment of the utility model provides an in above-mentioned one or more technical scheme, one of following technological effect has at least:

the utility model discloses rail vehicle bogie framework adopts the department of treating welding, the department of treating welding of box crossbeam at the box curb girder to and treat that the welding between box curb girder and the box crossbeam all forms the welding seam through high-frequency pulse MAG welding, and the welding heat is little, warp for a short time, and welding speed is faster, and welding efficiency can improve about 30-40% compared with ordinary welding; the high-frequency pulse MAG welding arc column is narrowed, the compressed arc characteristic is achieved, the welding penetration and the electric arc penetrating power are increased, the welding seam quality is good, and the structural strength after welding is high.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic top view of a bogie frame for a railway vehicle according to an embodiment of the present invention;

fig. 2 is a schematic side view of a bogie frame for a railway vehicle according to an embodiment of the present invention.

Reference numerals:

100: a bogie frame; 10: a box-type side beam; 10-1: a side bearing seat; 20: a box-type beam; 30: an auxiliary cross beam; 30-1: a brake hanging seat; 40: and (7) welding seams.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the embodiments of the present invention can be understood in specific cases by those skilled in the art.

In embodiments of the invention, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

As shown in fig. 1 to 2, a railway vehicle bogie frame, abbreviated as bogie frame 100, according to an embodiment of the present invention includes a pair of box-type side beams 10 and a box-type cross beam 20 connected between the pair of box-type side beams 10, and is integrally formed in an "H" shape and designed with a device hanging position, the "box-type" in this embodiment is a structure with a cavity formed by welding a plurality of steel plates, and a welding seam 40 is formed by high-frequency pulse MAG welding (Metal Active Gas arc welding) at a welding site of the box-type side beam 10, a welding site of the box-type cross beam 20, and a welding site between the box-type side beam 10 and the box-type cross beam 20.

In the bogie frame 100 of the embodiment, the welding seam 40 is formed at each part to be welded by high-frequency pulse MAG welding, so that the welding heat input is small (namely the welding heat is small), the welding deformation is small, the welding quality is good, the welding strength is high, the integrity of the formed bogie frame 100 is good, the post-welding process is good, and the strength is high.

Compared with the common pulse MIG (metal inert-gas welding)/MAG welding, the arc transition pulse frequency under the common pulse MIG/MAG welding is in one pulse-one drop transition, while the arc transition pulse frequency of the high-frequency pulse MAG welding can be increased by 30-50%, and an uninterrupted pulse arc, namely, a transition form of one pulse and multiple drops, is formed. The high-frequency pulse MAG welding has faster welding speed which can be improved by about 30-40% compared with the common pulse MAG welding; the arc column is narrowed, so that the arc column has the characteristic of compressing the electric arc, and the welding penetration and the penetrating power of the electric arc are increased; only small current is needed during welding, so that the welding method is more stable and is more suitable for vertical backing welding; and basically has no welding spatter.

By utilizing the characteristics of high-frequency pulse MAG welding penetration and strong penetrating power of electric arc, the box-shaped side beam 10 adopts a single-side welding and double-side forming process, namely, only one side of a steel plate of the box-shaped side beam 10 can penetrate to the other side without welding the other side, so that the welding efficiency is greatly improved.

According to an embodiment of the present invention, the weld 40 comprises a backing weld layer and a fill, cap weld layer. The whole weld metal of the steel plate on the conventional bogie frame has three layers (three layers): the first layer is the backing weld bead, the second layer is the filling weld bead, and the third layer is the facing weld bead. The welding heat input is large, the welding deformation is large, the number of layers of welding seams is large, and the welding efficiency is low. The welding seam 40 of the bogie frame 100 of the embodiment only needs two layers, so that the welding heat input is reduced, the heat quantity is less, the thermal expansion and cold contraction deformation in the welding process is small, the welding deformation is small, and the tissue performance after welding is good. The present embodiment can reduce the number of welding passes to save welding time and production cost.

The bevel angle of the butt welding process adopting common welding is 60 degrees, the required welding wire filling amount is large, and therefore the heat required by welding is large, and the welding deformation is large.

According to the utility model discloses an embodiment, box curb girder 10 with box crossbeam 20 all includes the polylith steel sheet, 12mm steel sheet for example, treats welded adjacent steel sheet butt joint groove angle is 30 degrees ~ 40 degrees, utilizes high-frequency pulse MAG welding to have arc column narrowing and compression arc characteristic, can leave less butt joint groove just can satisfy the requirement when the butt joint groove is reserved to the steel sheet, and the butt joint groove angle of this embodiment is 30 degrees ~ 40 degrees, just can satisfy the requirement, and required welding wire filling volume is few, and welding deformation is little, and the metal texture performance is good.

According to the utility model discloses an embodiment, box curb girder 10 with box crossbeam 20 all includes the polylith steel sheet, treats welded adjacent clearance between the steel sheet is 0 ~ 1mm, utilizes high-frequency pulse MAG to weld the penetration power of weld penetration and electric arc strong, and the welding heat is little, and required welding wire is few, can set up small clearance or even zero clearance before the welding between to the steel sheet, to the steel sheet of thickness below 12 mm. The required welding wire filling amount of the existing welding mode is large, the required welding gap is 2-3mm, and therefore the framework steel plate of the embodiment has small requirement on the welding gap, even no gap is required, the setting is more convenient, and the welding is more convenient.

The utility model discloses an embodiment, the electric arc that high frequency pulse MAG welded is formed by the electric arc of IGBT (insulated gate bipolar transistor) contravariant welding machine output. The IGBT inverter welding machine is accurately controlled to output electric arcs, so that the welding machine outputs uninterrupted pulse electric arcs, namely high-frequency pulse electric arcs, the linear energy of the electric arcs is increased, the stiffness of the electric arcs is increased, and the welding of various metal materials is facilitated. The welding waveform is output through simulating chopping, so that the molten drop transition frequency is improved, and the frequency is improved more when the welding current is larger.

The utility model discloses an embodiment, the frequency of high frequency pulse MAG welding is 200 ~ 300 Hz.

According to the utility model discloses an embodiment, high-frequency pulse MAG welding forms the welding current of backing weld layer is 160 ~ 180A, high-frequency pulse MAG welding forms the welding current of filling, capping weld layer is 180 ~ 200A. The welding current of the backing welding channel layer formed by high-frequency pulse MAG welding is 17-19V, and the welding current of the filling and capping welding channel layer formed by high-frequency pulse MAG welding is 18-20V; the welding speed of the high-frequency pulse MAG welding to form the backing weld layer is 30-35 cm/min, and the welding speed of the high-frequency pulse MAG welding to form the filling and capping weld layer is 30-35 cm/min. In one embodiment, the welding heat input of the high-frequency pulse MAG welding for forming the backing weld layer is 4.4-4.7 kJ/cm, and the welding heat input of the high-frequency pulse MAG welding for forming the filling and capping weld layer is 5.2-5.5 kJ/cm. Table 1 shows a comparison table of parameters of the welding process of high-frequency pulse MAG welding and common pulse MAG welding, in the table, MAG-O (traditional pulse MAG welding); MAG-N (high frequency pulsed MAG welding), which has a weld heat input reduction of about 49% compared to MAG-O. See table 1:

in the embodiment, a joint welded by high-frequency pulse MAG welding (MAG-N) is selected, the metal of the welding seam 40 is well fused with the base metal, and the residual stress value of the welding toe of the welding joint is shown in a table 2 for comparing the residual stress values of the welding toe of the welding joint of the high-frequency pulse MAG welding and the common pulse MAG welding. Compared with the common pulse method which needs to select a 60-degree butt joint groove, the high-frequency pulse MAG welding method which needs to select a butt joint groove of about 30 degrees can obviously reduce the residual stress at the weld toe of the welding joint. For transverse residual stress (σ)_y) The reduction of the start end, the middle end and the end is about 30%; for longitudinal residual stress (σ)_x) The decrease from the beginning, middle, and end is about 8-10%. See table 2:

according to the utility model discloses an embodiment, the both sides of box crossbeam 20 be equipped with respectively one with the box crossbeam 20 is parallel and the auxiliary beam 30 of being connected respectively with a pair of box curb girder 10, auxiliary beam 30 with the department of treating welding between the box curb girder 10 passes through high-frequency pulse MAG welds formation welding seam 40. The bogie frame 100 is mainly made of Q345E steel plate as a whole material, and is designed with an axle box assembly interface, a traction device interface, a secondary suspension component and a basic brake device structure, and a suspensible equipment interface is reserved. Structural design is reasonable, and suspensible equipment layout is compact. Of course, high frequency pulse MAG welding may also be used to form the weld 40 between the hanger device provided on the frame and the frame. A plurality of longitudinal reinforcing rib plates are designed in a cavity inside the box-type cross beam 20, stress concentration is avoided, a traction device interface is designed in the center of the box-type cross beam 20, and two abrasion plates are welded; two auxiliary beams 30 are designed, and each auxiliary beam 30 is used for suspending 2 brake hanging seats 30-1; the center position of the box-type side beam 10 is provided with a side bearing seat 10-1 according to the diameter of a secondary spring; and is provided with a transverse shock absorber and a vertical shock absorber mounting seat which are divided into two groups.

In the embodiment, the bogie frame 100 is welded by adopting high-frequency pulse MAG welding, so that the bogie frame is small in deformation, high in welding speed and attractive in forming, and the effects of saving time, labor and materials are achieved, thereby bringing greater economic benefit; the high-frequency pulse MAG welding is concentrated and stable electric arc can be used for narrow gap welding; the high-frequency pulse MAG welding has deeper fusion depth compared with the common pulse MAG welding; the high-frequency pulse MAG welding is used for backing welding, can replace TIG welding backing, and the welding speed is 4-5 times of TIG; high frequency pulse MAG welding makes the vertical up welding process simpler. The welding process is decomposed into a combination of two different welding processes of a 'hot stage' and a 'cold stage' through double-pulse control, so that the input of welding energy is controlled, and a perfect welding seam 40 is formed. In addition, the main differences between high frequency pulsed MAG welding and normal MAG welding in terms of process performance and weld suitability are shown in comparative table 3.

The high-frequency pulse MAG welding can perfectly weld iron-based, nickel-based, cobalt-based, copper-based alloy, aluminum and alloy thereof.

The bogie frame 100 of the embodiment adopts the high-frequency pulse MAG to weld the welding seam 40, so that the residual stress is obviously reduced by 10-30%; the welding heat input is small, at least one layer of welding pass can be reduced for the butt welding seam 40 and the HV type welding seam 40, and the welding heat input can be reduced by 30-50%; the welding material and the welding time are saved, and the material and the welding time can be saved by nearly 40 percent; the root fusion of the backing weld is significantly improved.

The above embodiments are merely illustrative, and not restrictive, of the present invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalent substitutions may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and all of the technical solutions should be covered by the scope of the claims of the present invention.

Claims

1. A railway vehicle bogie frame comprises a pair of box-type side beams and a box-type cross beam connected between the pair of box-type side beams, and is characterized in that a welding seam is formed at a position to be welded of the box-type side beams, a position to be welded of the box-type cross beam and a position to be welded between the box-type side beams and the box-type cross beam through high-frequency pulse MAG welding.

2. The railway vehicle truck frame of claim 1, wherein the weld comprises a backing weld layer and a filler, cap weld layer.

3. The railway vehicle bogie frame of claim 1, wherein each of the box side beams and the box cross beam comprises a plurality of steel plates, and the angle of the butt joint groove of adjacent steel plates to be welded is 30-40 degrees.

4. The railway vehicle bogie frame according to claim 1, wherein the box side beams and the box cross beams each comprise a plurality of steel plates, and a gap between adjacent steel plates to be welded is 0-1 mm.

5. The railway vehicle truck frame of claim 1, wherein the arc of the high frequency pulse MAG weld is formed by an arc output by an IGBT inverter welder.

6. The railway vehicle bogie frame of claim 1, wherein the frequency of the high frequency pulse MAG welds is 200-300 Hz.

7. The railway vehicle truck frame of claim 2, wherein the high frequency pulse MAG welding forms the backing weld layer with a welding current of 160-180A and the high frequency pulse MAG welding forms the filler, cap weld layer with a welding current of 180-200A.

8. The railway vehicle truck frame of claim 2, wherein the high frequency pulse MAG weld forms the backing weld layer with a weld current of 17-19V, and the high frequency pulse MAG weld forms the filler, cap weld layer with a weld current of 18-20V; the welding speed of the high-frequency pulse MAG welding to form the backing weld layer is 30-35 cm/min, and the welding speed of the high-frequency pulse MAG welding to form the filling and capping weld layer is 30-35 cm/min.

9. The railway vehicle truck frame of claim 2, wherein the high frequency pulse MAG weld forms the backing weld layer with a weld heat input of 4.4-4.7 kJ/cm and the high frequency pulse MAG weld forms the filler, cap weld layer with a weld heat input of 5.2-5.5 kJ/cm.

10. The railway vehicle bogie frame according to claim 1, wherein an auxiliary beam is provided on each side of the box-type beam parallel to the box-type beam and connected to each of a pair of box-type side beams, and a weld is formed at a portion to be welded between the auxiliary beam and the box-type side beam by the high frequency pulse MAG welding.