Integrated high-speed train bogie casting framework design method and framework

Abstract

The invention discloses an integrated high-speed train bogie casting framework design method and a framework, and the method integrates different parts or elements in a framework main body into a whole to form a complete structure, adopts a casting process to enable the complete structure to be formed by casting at one time, and then performs machining to form the integrated high-speed train bogie casting framework. The framework body is made of the metal-based composite material, the tensile strength of the framework body under the casting condition is larger than 250 MPa, the framework body is integrated, all parts are formed through one-time casting, the framework body is made of the metal-based composite material, and the framework body has the advantages of being stable in structure, short in working procedure, high in production efficiency, low in cost and high in practicability. And the weight is light.

Description

Technical Field

[0001] The invention relates to the technical field of rail transit vehicle bogies, and in particular to a design method and a frame of an integrated high-speed train bogie casting frame. Background Art

[0002] The bogie is a running device that supports the train body and can rotate relative to the train body. It usually includes a frame, axle box device, a spring damping device, and a basic brake device. The EMU bogie also includes a drive device. The frame is the basic load-bearing structure located between the primary and secondary suspension devices of the bogie;

[0003] The main structure of the frame is generally composed of side beams, cross beams and other components. At present, the main structure of the existing rail train bogie frame is generally made of welded steel plates, the side beams are made of steel plate welded box-type structures, and the cross beams are made of steel plate welded box-type structures or seamless steel pipes. The frame cross beams and side beams are connected by welding. At the same time, various mounting seats such as brake hangers, shock absorber seats, traction motor mounting seats, gear box hangers, and transverse stoppers are welded on the frame (see attached Figure 1 ), there are problems such as long welding process cycle, many processes, and large welding deformation;

[0004] In addition, the bogie is an important component of rail transit transportation equipment. Its technical development direction and trend include high-speed passenger transportation and lightweight structure. Weight reduction is an important part of high-speed train bogies. The current frame structure has also been optimized, and there is limited room for further weight reduction. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the prior art and provide a design method and a frame for an integrated high-speed train bogie casting frame, which is used to solve the problems of long welding process cycle, multiple processes and large welding deformation when using steel plate welding frames.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] The integrated high-speed train bogie casting frame design method disclosed in the present invention comprises:

[0008] The different parts or elements in the frame body are integrated into a whole to form a complete structure, and the casting process is used to cast the complete structure in one step. After machining, the overall preparation of the frame body is completed. The material of the frame body is a metal-based composite material. The metal-based composite material has a tensile strength of more than 250MPa under casting conditions.

[0009] Furthermore, the material of the main body of the frame is selected to be an aluminum-based composite material, with a yield strength of 300 MPa under casting conditions, a tensile strength greater than 350 MPa, and an elastic modulus of 75-80 GPa.

[0010] Furthermore, the main structure of the frame is an H-shaped box-type closed structure, and the frame is manufactured in an integrated manner using a casting near-net-shape forming process.

[0011] The invention implements the above-mentioned integrated high-speed train bogie casting frame design method, comprising: a frame body, which includes side beams and cross beams, the side beams are arranged at both ends of the cross beams arranged at intervals, and a concave structure is formed in the middle of the side beams;

[0012] The side beam and the cross beam are integrally formed with a swivel arm positioning seat, a brake hanger, an anti-snaking shock absorber seat, a first-series vertical shock absorber seat, a second-series lateral shock absorber seat, a second-series vertical shock absorber seat, a traction motor shock absorber seat, a traction motor mounting seat, a gear box hanger, a lateral stop seat, a traction rod seat, an anti-roll and torsion bar connecting rod mounting seat, and a lifting stop seat.

[0013] Preferably, the swing arm positioning seats are integrally formed at the lower parts of both sides of the side beams. The swing arm positioning seats are formed as one piece with the side beams and have a nest-shaped structure for installing the bogie swing arm.

[0014] Preferably, the secondary vertical shock absorber is seated at the connection position between the side beam and the cross beam, and is integrally formed with the cross beam.

[0015] Preferably, the anti-roll torsion bar connecting rod mounting seat on the side beam is connected to the anti-snaking shock absorber seat and the swing arm positioning seat to form an integrated structure.

[0016] In the above technical solution, the integrated high-speed train bogie casting frame design method and frame provided by the present invention have the following beneficial effects:

[0017] 1) The frame integrates each mounting seat into a whole, and uses a casting process to cast the parts in one step. After a small amount of machining, the overall preparation of the frame is completed, which has the advantages of stable structure, short process, high production efficiency and low cost;

[0018] 2) Aluminum-based composite materials are used in high-speed train bogie frames, breaking through the traditional steel plate welded structure that has been used for many years and achieving weight reduction of the bogie frame;

[0019] 3) The frame arm positioning seat is integrated with the side beam and presents a nest-shaped structure, which realizes the installation of the bogie arm and improves the strength of the arm positioning seat;

[0020] 4) The secondary vertical shock absorber seat is integrated with the transverse side beam of the frame, which helps to improve the strength of the connection part of the transverse side beam;

[0021] 5) The anti-roll and torsion bar connecting rod mounting seat on the side beam is integrated with the anti-snaking shock absorber seat and the swing arm positioning seat to form a three-in-one structure, which improves the structural strength of this part. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a schematic diagram of a welded frame structure in the prior art;

[0024] Figure 2 It is a schematic diagram of the overall structure of the integrated high-speed train bogie casting frame disclosed in the present invention;

[0025] Figure 3 This is a front view of the integrated high-speed train bogie casting frame disclosed in the present invention;

[0026] Figure 4 It is a top view of the integrated high-speed train bogie casting frame disclosed in the present invention;

[0027] Figure 5 It is a left view of the integrated high-speed train bogie casting frame disclosed in the present invention;

[0028] Figure 6 It is a partial view of the swing arm positioning seat of the integrated high-speed train bogie casting frame disclosed in the present invention;

[0029] Figure 7 It is a partial view of the secondary vertical shock absorber seat of the integrated high-speed train bogie casting frame disclosed by the present invention;

[0030] Figure 8 It is a partial view of the anti-snaking damper seat, the anti-rolling torsion bar connecting rod mounting seat and the swing arm positioning seat of the integrated high-speed train bogie casting frame disclosed by the present invention.

[0031] Description of reference numerals:

[0032] 1. Side beam; 2. Side beam; 3. Cross beam; 4. Cross beam; 5. Swing arm positioning seat; 6. Brake hanger; 7. Anti-snaking shock absorber seat; 8. First series vertical shock absorber seat; 9. Second series lateral shock absorber seat; 10. Second series vertical shock absorber seat; 11. Traction motor shock absorber seat; 12. Traction motor mounting seat; 13. Gear box hanger; 14. Cross stop seat; 15. Traction tie rod seat; 16. Anti-roll and torsion bar connecting mounting seat; 16. Rod mounting seat; 17. Lifting stop seat. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0034] See also Figure 2-5 As shown;

[0035] A method for designing an integrated high-speed train bogie casting frame is invented, in which different parts or elements in the frame body are integrated into a whole to form a complete structure, and a casting process is used to cast the complete structure in one step, and then after machining, the overall preparation of the frame body is completed. The material of the frame body is a metal-based composite material, and the metal-based composite material has a tensile strength of more than 250MPa under casting conditions.

[0036] Preferably, the material of the frame body is selected as an aluminum-based composite material, the yield strength under casting conditions is 300MPa, the tensile strength is greater than 350MPa, and the elastic modulus is 75-80GPa. The aluminum-based composite material frame realizes the transformation of the frame from carbon steel and weathering steel to high-strength alloy. In the selection of lightweight materials for the bogie, the frame material needs to meet the following conditions: first, the yield strength and tensile strength of the material, second, the material must have sufficient rigidity, third, a suitable molding process, and fourth, appropriate material cost. Through the analysis and research of metal-based composite materials, the aluminum-based composite material has a smaller density, the yield strength under casting conditions can reach about 300MPa, the tensile strength is greater than 350MPa, and the elastic modulus is 75-80GPa. The material cost is increased by about 25% compared with aluminum alloy. The bogie frame adopts aluminum-based composite materials to achieve the purpose of weight reduction. Moreover, the aluminum-based composite material is mainly to add particle reinforcement, such as SiC, TiB2 or fiber, to the aluminum alloy to achieve the purpose of improving the mechanical properties and fatigue resistance of conventional cast aluminum alloys.

[0037] Preferably, the main structure of the frame is an H-shaped box-type closed structure, and the frame is integrally prepared by a casting near-net-shape forming process.

[0038] The design method integrates the casting molding process, so that the parts are cast and molded in one time. The overall structure of the frame is a box-type closed structure, and the casting near-net molding process is used to prepare the frame in an integrated manner. The casting near-net molding process sets a processing surface at the interface position and leaves a small amount of processing allowance. The low-pressure casting process is used to cast and mold the parts in one time (the low-pressure casting process belongs to the near-net casting molding process). After a small amount of machining, the overall preparation of the frame is completed. It has the advantages of stable structure, short process, high production efficiency, low cost, etc. The integral casting frame processes the component installation parts as a whole, and the installation parts meet the matching requirements.

[0039] See also Figure 2-5 As shown:

[0040] The invention implements the above-mentioned integrated high-speed train bogie casting frame design method, comprising:

[0041] The main frame includes side beams 1, side beams 2, cross beams 3, and cross beams 4. The cross beams 3 and cross beams 4 are arranged at intervals. The side beams 1 and side beams 2 are arranged at both ends of the cross beams 3 and 4 respectively. The side beams 1 and side beams 2 are concave structures in the middle. The side beams 1, side beams 2 and cross beams 3 and cross beams 4 are H-shaped box-type closed structures (see Figure 2-4 shown);

[0042] The side beams 1 and 2 are integrally formed with a swing arm positioning seat 5, a brake hanger 6, an anti-snaking shock absorber seat 7, a first-order vertical shock absorber seat 8, and an anti-roll torsion bar connecting rod mounting seat 16. The cross beams 3 and 4 are integrally formed with a second-order lateral shock absorber seat 9, a second-order vertical shock absorber seat 10, a traction motor shock absorber seat 11, a traction motor mounting seat 12, a gear box hanger 13, a lateral stop seat 14, a traction rod seat 15, a lifting stop seat 17 and other mounting seats (see Figure 3-5 shown).

[0043] The lower parts of the two sides of the side beams 1 and 2 are provided with a swing arm positioning seat 5, which is integrated with the side beams 1 and 2 to form a nest-shaped structure, so as to realize the installation of the bogie swing arm (see Figure 6 shown).

[0044] The secondary vertical shock absorber seat 10 is placed at the connection between the side beams 1, 2 and the cross beams 3, 4, and is integrated with the cross beams 3, 4, which helps to improve the strength of the cross beam connection (see Figure 7 shown).

[0045] The anti-roll torsion bar connecting rod mounting seat 16 on the side beam 1 and the side beam 2 is connected with the anti-snaking damper seat 7 and the swing arm positioning seat 5 to form a three-seat integrated structure, thereby improving the structural strength of this part (see Figure 8 shown).

[0046] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. The integrated high-speed train bogie casting frame design method is characterized by ； The different parts or elements in the frame body are integrated into a whole to form a complete structure, and the casting process is used to cast the complete structure in one step. After machining, the overall preparation of the frame body is completed. The material of the frame body is a metal-based composite material. The metal-based composite material has a tensile strength of more than 250MPa under casting conditions.

2. The integrated high-speed train bogie casting frame design method according to claim 1 is characterized in that ； The material of the main body of the frame is an aluminum-based composite material with a yield strength of 300MPa under casting conditions, a tensile strength greater than 350MPa, and an elastic modulus of 75-80GPa.

3. The integrated high-speed train bogie casting frame design method according to claim 1 is characterized in that ； The main structure of the frame is an H-shaped box-type closed structure, and the frame is manufactured in an integrated manner using a casting near-net-shape forming process.

4. A framework for implementing the integrated high-speed train bogie casting frame design method as described in claim 1, characterized in that: include; A frame body comprises side beams (1, 2) and cross beams (3, 4), the side beams (1, 2) being arranged at both ends of the cross beams (3, 4) arranged at intervals, and a concave structure being formed in the middle of the side beams (1, 2); The side beams (1, 2) and the cross beams (3, 4) are integrally formed with a swing arm positioning seat (5), a brake suspension seat (6), an anti-snaking shock absorber seat (7), a first-order vertical shock absorber seat (8), a second-order lateral shock absorber seat (9), a second-order vertical shock absorber seat (10), a traction motor shock absorber seat (11), a traction motor mounting seat (12), a gear box suspension seat (13), a lateral stop seat (14), a traction rod seat (15), an anti-rolling and torsion bar connecting rod mounting seat (16), and a lifting stop seat (17).

5. The framework of the integrated high-speed train bogie casting framework design method according to claim 4, It is characterized by: The swing arm positioning seat (5) is integrally formed at the lower part of both sides of the side beams (1, 2); the swing arm positioning seat (5) is integrally formed with the side beams (1, 2) and has a nest-shaped structure, and is used for installing the bogie swing arm.

6. The structure of the integrated high-speed train bogie casting frame design method according to claim 4 is characterized in that ； The secondary vertical shock absorber seat (10) is placed at the location where the side beams (1, 2) and the cross beams (3, 4) are connected, and is integrally formed with the cross beams (1, 2).

7. The framework of the integrated high-speed train bogie casting framework design method according to claim 4, It is characterized by: The anti-roll torsion bar connecting rod mounting seat (16) on the side beams (1, 2) is connected to the anti-snaking damper seat (7) and the swing arm positioning seat (5) to form an integrated structure.

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