Overall deflection welding tool for vehicle bottom door frame

Abstract

The utility model is suitable for the technical field of welding tools, and provides a vehicle bottom door frame integral displacement welding tool which comprises an outer frame and a clamp tool assembly installed on the outer frame, and a plurality of frame supporting beams are arranged in the outer frame in the transverse direction and the longitudinal direction of the outer frame. The clamp tool assembly comprises a plurality of spiral pressing arms arranged on the outer frame, a spiral pushing arm, a bottom frame stopping block and a plurality of supporting positioning seats arranged on the frame supporting beam, and positioning end seats are installed on the two sides, in the transverse direction, of the outer frame. Therefore, the tool can meet the requirement for overall welding of bottom door frames of different left and right vehicle types, the welding angle can be switched through the positioner, the positioning datum can be adjusted and set at will through the positioning base, various size requirements are met, and a crown block does not need to be overturned, hoisted and replaced any more. Meanwhile, the tool has universality and can be used in production projects of a plurality of aluminum alloy grain hopper car bottom door frames of the same type.

Description

Technical Field

[0001] This utility model applies to the field of welding tooling technology and provides a welding tooling for the overall displacement of a vehicle underbody door frame. Background Technology

[0002] The aluminum alloy bottom door frame is one of the most important components of freight rail transit vehicles, providing load-bearing capacity and facilitating rapid unloading of freight goods such as grain. A typical aluminum alloy freight car body mainly consists of major components such as the underframe, aluminum sidewalls, aluminum roof, aluminum end walls, and aluminum bottom door frame. The bottom door frame, as the main load-bearing structure, bears the majority of the weight of the load and is connected to the bottom door panel via a cylinder device. The bottom door panel transmits traction force through the cylinder, enabling rapid unloading of goods.

[0003] Conventional freight rail transit bottom door frames are made of steel structures. The alternative is an aluminum alloy structure, which offers the advantage of being lighter than carbon steel, increasing the overall cargo load capacity. The aluminum alloy bottom door frame is a double-layer frame structure. After assembly and welding, the gap between the bottom door panels and the frame is required to be 0-0.7mm. Because aluminum alloy materials deform significantly after welding, controlling the deformation is difficult. The current standard practice for welding bottom door frames is as follows: two separate single-layer structural fixtures are fabricated, and the crossbeams and roller supports are welded together. After welding, the flatness is adjusted. Then, the welded crossbeams and roller supports are placed into the second assembly fixture, and the entire frame is welded.

[0004] Current aluminum alloy bottom door frame fixtures are costly, occupy a large area, and require overhead cranes for hoisting and tilting, which is time-consuming and labor-intensive. Furthermore, manual adjustments are prone to errors. Considering the costs, efficiency, and quality risks, these methods are all inadequate. Therefore, considering the ease of maintenance, safety, structural stability, and compatibility with left and right vehicle models, a solution for an overall displacement welding fixture for the bottom door frame of an aluminum alloy grain hopper car is needed. Utility Model Content

[0005] To address the aforementioned deficiencies, the present invention aims to provide a welding fixture for the overall displacement of a vehicle bottom door frame, in order to solve the problems mentioned in the background art. The device includes an outer frame and a fixture assembly mounted on the outer frame. The outer frame has several frame support beams arranged along both the horizontal and vertical directions. The fixture assembly includes several helical pressure arms, helical push arms, bottom frame stops, and several support positioning seats arranged on the frame support beams, all mounted on the outer frame. Positioning end seats are installed on both sides of the outer frame in the horizontal direction.

[0006] Furthermore, the outer frame has two bottom frame stops at one end along its length, and several spiral push arms corresponding to the bottom frame stops are provided at the other two ends along its length.

[0007] Furthermore, the outer frame has several helical pressure arms on one end along the width direction, and several helical push arms and several helical pressure arms on the other two ends along the width direction.

[0008] Furthermore, the spiral pressure arm includes a hinged seat mounted on the outer frame via a support portion, and a U-shaped curved arm is hingedly connected to the hinged seat. The U-shaped curved arm is provided with two pressing mechanisms with their output ends pointing downwards and towards the support portion, respectively.

[0009] Furthermore, the hinge seat is provided with a hinge hole and a plug hole, and one end of the U-shaped bend arm is provided with a first through hole and a second through hole corresponding to the hinge hole and the plug hole respectively. The first through hole is hinged to the hinge hole through a connecting bolt, and the second through hole is plugged into the plug hole through a plug bolt.

[0010] Furthermore, a stop block is fixedly connected to the support portion at the bottom of the spiral pressure arm.

[0011] Furthermore, the spiral push arm includes a support portion and a clamping mechanism mounted on the outer frame via the support portion.

[0012] Furthermore, the clamping mechanism includes a threaded sleeve and a threaded rod threaded inside the threaded sleeve; a rotating part and a second pad are fixedly connected to both ends of the threaded rod, and the rotating part is provided with a through hole.

[0013] Furthermore, the bottom frame stop includes a support portion mounted on the outer frame, a stop portion mounted on the top of the support portion, and a first pad block mounted on the stop portion.

[0014] Therefore, this tooling can meet the overall welding requirements of the bottom door frame of different car models. The welding angle can be switched by a positioner, and the positioning reference can be adjusted arbitrarily by a positioning seat to meet various size requirements. It saves time and labor, and eliminates the need for overhead crane tilting and hoisting for replacement, freeing up overhead crane resources. At the same time, this tooling is versatile and can be used in multiple similar aluminum alloy grain hopper car bottom door frame production projects. Attached Figure Description

[0015] Figure 1 A three-dimensional schematic diagram of the fixing structure of the tooling and the door frame;

[0016] Figure 2 This is a top view of the tooling;

[0017] Figure 3 This is a schematic diagram of the spiral pressure arm structure;

[0018] Figure 4 This is a schematic diagram of a U-shaped curved arm structure;

[0019] Figure 5 This is a schematic diagram of the bottom frame stop structure;

[0020] Figure 6 A schematic diagram of the supporting positioning seat structure;

[0021] Figure 7 This is a schematic diagram of the spiral pusher structure;

[0022] Figure 8 This is a schematic diagram of the clamping mechanism.

[0023] In the diagram: 01-Door frame edge; 1-Outer frame; 11-Support part; 12-Clamping mechanism; 121-Threaded sleeve; 122-Threaded rod; 123-Rotating part; 124-Through hole; 125-Second pad; 13-Stop part; 131-First pad; 2-Frame support beam; 3-Positioning end seat; 4-Screw pressure arm; 41-Hinge seat; 411-Hinge hole; 412-Plug hole; 42-U-shaped bent arm; 421-First through hole; 422-Second through hole; 43-Stop block; 5-Screw push arm; 6-Bottom frame stop; 7-Support positioning seat. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] It should be noted that, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] Furthermore, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0028] See Figure 1-8 The purpose of this utility model is to provide a welding fixture for the overall displacement of the door frame under a vehicle.

[0029] The undercarriage door frame mainly consists of attached Figure 1 The end frame, door frame side 01, crossbeam, and other components shown in the diagram need to be assembled one by one onto the welding fixture during the actual assembly and welding process. The fixture's clamping components are used to position, fasten, and tighten each component, thereby minimizing deformation errors during welding. Furthermore, the fixture is designed to be mountable to a positioner, allowing the positioner to rotate and reposition the entire fixture, thus resolving angle issues during the welding of the vehicle's undercarriage door frame.

[0030] Therefore, this technical solution mainly adopts the design concept of double-layer structure integral displacement welding, while satisfying the compatibility of the left and right door frames.

[0031] The main structure of this technical solution includes an outer frame 1, a spiral pressure arm 4, a spiral push arm 5, a bottom frame stop 6, and a support positioning seat 7. After manufacturing these components, they are then welded and bolted together onto the outer frame 1. Specifically, the overall displacement welding fixture for the vehicle bottom door frame provided by this utility model includes a rectangular outer frame 1 composed of four square tubes. Frame support beams 2 are fixedly connected to the inner side of the outer frame 1 in both the transverse and longitudinal directions; see attached... Figure 2 The tooling top view shown has 9 frame support beams 2 in the horizontal direction (the length direction of the overall rectangle of the outer frame 1) and 2 frame support beams 2 in the vertical direction (the width direction of the overall rectangle of the outer frame 1).

[0032] The frame support beam 2 is used to reinforce the overall structure of the tooling, and various clamping tooling components for fixing the bottom door frame can be installed on top of it.

[0033] The outer frame 1 and the frame support beam 2 together form the frame support, while the spiral pressure arm 4 and spiral push arm 5 serve as fixture components (clamping devices). Both the frame support and the clamping device are made of carbon steel and mainly fix the external dimensions of the door frame end frame, door frame side frame 01, crossbeam, and other components. The frame support adopts an integrated welded structure to improve its overall rigidity and strength.

[0034] In addition, see appendix Figure 2 and appendix Figure 6Several support positioning seats 7 are arranged on the frame support beam 2. The support positioning seats 7 are made of aluminum alloy blocks and have slots corresponding to the bottom door frame. They are used to position and support the end frame, door frame edge 01, and various points of the crossbeam on the bottom door frame. They are used in conjunction with the spiral pressure arm 4 and spiral push arm 5 to fix the horizontal spine and other position dimensions of the bottom door frame, which facilitates the operator's assembly and improves the assembly dimensional quality.

[0035] This technical solution includes the following key technical points:

[0036] 1. The outer frame 1 has positioning end seats 3 fixedly connected to both sides in the horizontal direction; the positioning end seats 3 can be fixedly connected to the output end of the positioner by bolts. The output end of the positioner can drive the entire fixture to rotate by fixing it to the positioning end seats 3.

[0037] 2. The outer frame 1 has two bottom frame stops 6 on one side (first position end) in the horizontal direction, and several spiral push arms 5 corresponding to the bottom frame stops 6 on the other side (second position end) of the outer frame 1 in the horizontal direction. The entire bottom door frame is positioned by the bottom frame stops 6 at the first position end. After positioning, the spiral push arms 5 are used to adjust the second position end to require the diagonal error value to be ≤2mm.

[0038] 3. Several spiral pressure arms 4 are provided on one end of the outer frame 1 in the width direction, and several spiral push arms 5 and several spiral pressure arms 4 are provided on the two ends in the width direction; the bottom door frame is positioned by spiral pressure arms 4 on one end in the width direction, and is adjusted by spiral push arms 5 on the two ends in the width direction. The dimensional error requirement is ±2mm.

[0039] 4. The outer frame 1 and the frame support beam 2 form an integral carbon steel thick plate structure with a total length of 3760mm and material of Q235, which improves the bending and deformation resistance of the bottom door frame. The positioning end seats 3 on both sides of the overall tooling are made of square ultra-thick plates with reserved holes for easy installation on the positioner.

[0040] 5. The flatness of the mounting base of the bottom door frame is ensured by integral machining to ensure consistent height. This structural design ensures that it does not interfere with other components while also guaranteeing the stability of the structure.

[0041] 6. The support positioning seat 7 can also use a high-strength support and a high-wear-resistant aluminum block with a specification of 100*100*40mm. The bottom slot is processed to the width required by the drawing, and the depth is reserved to facilitate the removal of the die after welding. The upper part is made of a contoured aluminum block and bolts are used to fasten it to prevent movement.

[0042] Preferably, the bottom frame stop 6 includes a support part 11 installed on the outer frame 1, a stop part 13 is fixedly connected to the top of the support part 11, the stop part 13 abuts against the bottom door frame when used for positioning, and a first pad block 131 is fixedly connected to one end of the stop part 13 near the bottom door frame.

[0043] Preferably, the spiral pressure arm 4 includes a hinge seat 41 mounted on the outer frame 1 via a support part 11. A U-shaped curved arm 42 is hinged to the hinge seat 41. The U-shaped curved arm 42 is provided with a pressing mechanism 12 with the output end facing downward and a pressing mechanism 12 with the output end facing the support part 11.

[0044] Preferably, the hinge seat 41 is provided with a hinge hole 411 and a insertion hole 412, and one end of the U-shaped arm 42 is provided with a first through hole 421 and a second through hole 422 corresponding to the hinge hole 411 and the insertion hole 412, respectively. The first through hole 421 is hinged to the hinge hole 411 through a hinge bolt, so that the U-shaped arm 42 can rotate around the hinge hole 411 to engage or disengage. The second through hole 422 is inserted into the insertion hole 412 through a insertion bolt to restrict the rotation of the U-shaped arm 42. When the rotation of the U-shaped arm 42 is restricted, the door frame edge 01 can be laterally pressed and positioned by the pressing mechanism 12 with its output end facing the support part 11, and then vertically pressed and positioned by the pressing mechanism 12 with its output end facing downward.

[0045] Preferably, a stop block 43 is fixedly connected to the support portion 11 at the bottom of the spiral pressure arm 4. The stop block 43 on the spiral pressure arm 4 is used to position one end of the vehicle bottom door frame in the width direction.

[0046] Preferably, the spiral push arm 5 includes a support portion 11 and a clamping mechanism 12 mounted on the outer frame 1 via the support portion 11. The clamping mechanism 12 is parallel to the plane of the outer frame 1.

[0047] Preferably, the clamping mechanism 12 includes a threaded sleeve 121 and a threaded rod 122 threadedly connected inside the threaded sleeve 121. A rotating part 123 and a second pad 125 are fixedly connected to both ends of the threaded rod 122, respectively. The rotating part 123 has a through hole 124. The second pad 125 is the output end of the clamping mechanism 12. The operator can insert a pin into the through hole 124 to rotate the threaded rod 122, thereby causing the second pad 125 to press against the door frame edge 01 of the vehicle's undercarriage door frame, thus achieving a clamping effect.

[0048] Therefore, this tooling can meet the overall welding requirements of the bottom door frame of different car models. The welding angle can be switched by a positioner, and the positioning reference can be adjusted arbitrarily by a positioning seat to meet various size requirements. It saves time and labor, and eliminates the need for overhead crane tilting and hoisting for replacement, freeing up overhead crane resources. At the same time, this tooling is versatile and can be used in multiple similar aluminum alloy grain hopper car bottom door frame production projects.

[0049] Of course, there may be other embodiments of this utility model. Without departing from the spirit and essence of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, but these corresponding changes and modifications should all fall within the protection scope of the appended claims of this utility model.

Claims

1. A welding fixture for integral displacement of a vehicle underbody door frame, characterized in that, The device includes an outer frame (1) and a fixture assembly mounted on the outer frame (1). The outer frame (1) has several frame support beams (2) arranged in both the horizontal and vertical directions. The fixture assembly includes several spiral pressure arms (4), spiral push arms (5), bottom frame stops (6) and several support positioning seats (7) arranged on the frame support beams (2). Positioning end seats (3) are installed on both sides of the outer frame (1) in the horizontal direction.

2. The integral displacement welding fixture for the vehicle underbody door frame according to claim 1, characterized in that, The outer frame (1) has two bottom frame stops (6) at one end along the length direction, and the outer frame (1) has several spiral push arms (5) corresponding to the bottom frame stops (6) at the other two ends along the length direction.

3. The integral displacement welding fixture for the vehicle underbody door frame according to claim 1, characterized in that, The outer frame (1) has several spiral pressure arms (4) on one end along the width direction, and several spiral push arms (5) and several spiral pressure arms (4) on the other two ends along the width direction.

4. The integral displacement welding fixture for the vehicle underbody door frame according to claim 1, characterized in that, The spiral pressure arm (4) includes a hinge seat (41) mounted on the outer frame (1) via a support (11). A U-shaped curved arm (42) is hinged to the hinge seat (41). The U-shaped curved arm (42) is provided with two pressing mechanisms (12) with their output ends pointing downwards and towards the support (11), respectively.

5. The integral displacement welding fixture for the vehicle underbody door frame according to claim 4, characterized in that, The hinge seat (41) is provided with a hinge hole (411) and a plug hole (412). One end of the U-shaped arm (42) is provided with a first through hole (421) and a second through hole (422) corresponding to the hinge hole (411) and the plug hole (412) respectively. The first through hole (421) is hinged to the hinge hole (411) through a hinge bolt, and the second through hole (422) is plugged into the plug hole (412) through a plug bolt.

6. The integral displacement welding fixture for the vehicle underbody door frame according to claim 4, characterized in that, A stop block (43) is fixedly connected to the support part (11) at the bottom of the spiral pressure arm (4).

7. The integral displacement welding fixture for the vehicle underbody door frame according to claim 1, characterized in that, The spiral pusher (5) includes a support (11) and a clamping mechanism (12) mounted on the outer frame (1) via the support (11).

8. The integral displacement welding fixture for the vehicle underbody door frame according to any one of claims 5-7, characterized in that, The clamping mechanism (12) includes a threaded sleeve (121) and a threaded rod (122) threaded inside the threaded sleeve (121); the two ends of the threaded rod (122) are respectively fixedly connected to a rotating part (123) and a second pad (125), and the rotating part (123) is provided with a through hole (124).

9. The integral displacement welding fixture for the vehicle underbody door frame according to claim 1, characterized in that, The bottom frame stop (6) includes a support part (11) installed on the outer frame (1), a stop part (13) is installed on the top of the support part (11), and a first pad (131) is installed on the stop part (13).

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