Egr cooler diffuser and bellows full weld clamping fixture

Abstract

The utility model discloses a kind of EGR cooler diffuser and corrugated pipe full welding clamping fixing device, including positioner, motor and fixed frame, motor and the power input shaft transmission connection of positioner, fixed frame is set on the turntable of positioner;Fixed frame includes base, gas supply mechanism and cooler fixing mechanism, base is set on the turntable of positioner, gas supply mechanism and cooler fixing mechanism are all set on base. Reached technical effect is as follows: EGR cooler can be clamped and fixed by using fixed frame, using positioner can drive whole fixed frame to rotate continuously and adjust angle, to facilitate full welding operation;Gas supply mechanism is equipped with, first quick clamp can be used to block head and be pressed in the end of EGR cooler air inlet connector, and air inlet is blocked, then air inlet nozzle is connected with gas supply pipe, inert gas can be introduced into EGR cooler using gas outlet, to maintain inert gas atmosphere of welding position, guarantee welding quality.

Description

Technical Field

[0001] This utility model relates to the field of cooler welding and processing technology, specifically to an EGR cooler diffuser and bellows full welding clamping and fixing device. Background Technology

[0002] In engine exhaust gas recirculation (EGR) systems, the welding quality between the EGR cooler and the bellows directly affects the system's sealing performance and durability. Currently, the traditional welding method typically employs a combination of spot welding and brazing: first, the bellows and EGR cooler are positioned on a welding fixture and spot welded together; then, brazing filler metal is applied around the weld area; and finally, the system is placed in a continuous brazing furnace or vacuum furnace to complete the welding. However, this welding method has the following problems:

[0003] 1. Insufficient strength of brazed joints: The strength of brazed welds is low. When subjected to large tensile, compressive or impact loads (such as engine vibration, high temperature and high pressure exhaust gas impact, etc.), the welds are prone to cracking, leading to media leakage and failing to meet the sealing requirements under harsh working conditions.

[0004] 2. Poor weld continuity: Brazing process makes it difficult to form a complete and dense weld, with microscopic pores or unwelded areas. After long-term use, the seal may fail due to fatigue or corrosion.

[0005] To improve weld strength, full welding (continuous welding, such as TIG welding, laser welding, etc.) can be used instead of brazing. Full welding can form a continuous and uniform weld, significantly improving the mechanical strength and sealing performance of the joint. However, in actual welding processes, full welding faces the following challenges:

[0006] 1. Insufficient adaptability of welding fixtures: Full welding requires welding fixtures that can rotate continuously so that the welding gun or laser head can weld evenly, but traditional fixed fixtures cannot meet this requirement.

[0007] 2. Inert gas protection requirements: In order to prevent oxidation of the welded parts, full welding usually needs to be carried out in an inert gas (such as argon) atmosphere. However, existing tooling is difficult to effectively maintain a local gas protection environment, resulting in unstable weld quality.

[0008] Therefore, there is an urgent need to design a new type of welding clamping and fixing device that can meet the requirements of full welding process. Utility Model Content

[0009] To address this issue, the present invention provides a fully welded clamping and fixing device for the diffuser and bellows of an EGR cooler, thereby solving the aforementioned problems in the prior art.

[0010] To achieve the above objectives, this utility model provides the following technical solution:

[0011] According to a first aspect of the present invention, an EGR cooler diffuser and bellows fully welded clamping and fixing device includes a positioner, a motor and a fixing frame, wherein the motor is drivenly connected to the power input shaft of the positioner and the fixing frame is disposed on the turntable of the positioner.

[0012] The mounting bracket includes a base, an air supply mechanism, and a cooler fixing mechanism. The base is mounted on the turntable of the positioner. The air supply mechanism and the cooler fixing mechanism are both mounted on the base. The cooler fixing mechanism is used to clamp and fix the EGR cooler body.

[0013] The air supply mechanism includes a plug, a slide rail, and a first quick clamp. The slide rail is mounted on the base, and the plug is slidably connected to the slide rail. The plug is matched with the air inlet connector of the EGR cooler body. The plug is provided with an air inlet and an air outlet. The air outlet is located on the side of the plug facing the air inlet connector of the EGR cooler body, and the air inlet and the air outlet are interconnected. The first quick clamp is located at one end of the slide rail and is used to press the plug against the end of the air inlet connector of the EGR cooler body.

[0014] Furthermore, a buffer sealing gasket is provided on the side of the plug facing the air intake end connector of the EGR cooler body.

[0015] Furthermore, the gas supply mechanism also includes a slide table, which is slidably connected to the slide rail, and the plug is disposed on the slide table.

[0016] Furthermore, the cooler fixing mechanism includes a second quick clamp and a plurality of support seats. The second quick clamp and the support seats are both disposed on the base, and the second quick clamp and the support seats are matched with each other.

[0017] Furthermore, the support base includes a first support base, a second support base, and a third support base. The top ends of the first support base, the second support base, and the third support base are respectively provided with a first support surface, a second support surface, and a third support surface. The first support surface, the second support surface, and the third support surface are respectively used to support the shell, the first bracket, and the second bracket of the EGR cooler body.

[0018] Furthermore, the first support surface, the second support surface, and the third support surface are all inclined surfaces.

[0019] Furthermore, the side of the first support surface is L-shaped.

[0020] Furthermore, the second support surface and the third support surface are respectively provided with a first positioning pin and a second positioning pin, and the first positioning pin and the second positioning pin are respectively matched with the mounting holes on the first bracket and the second bracket.

[0021] Furthermore, the cooler fixing mechanism also includes a mounting base disposed on the base, and the second quick clamp is mounted on the mounting base.

[0022] Furthermore, the base is plate-shaped and has multiple mounting holes.

[0023] This invention has the following advantages: the EGR cooler can be clamped and fixed using a fixing frame, and the angle can be continuously adjusted by rotating the entire fixing frame using a positioner, thus facilitating full welding operations; it is equipped with a gas supply mechanism, which can use the first quick clamp to press the plug against the end of the EGR cooler's gas inlet connector to seal the gas inlet, and then connect the gas supply pipe to the gas inlet nozzle, so that inert gas can be introduced into the EGR cooler through the gas outlet, thereby maintaining an inert gas atmosphere at the welding site and ensuring welding quality; the entire device has a simple structure, is easy to use and operate, can quickly complete the clamping and fixing of the EGR cooler, and can meet the processing conditions required for full welding processes. Attached Figure Description

[0024] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0025] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0026] Figure 1 This is a first-view perspective view of an EGR cooler diffuser and bellows fully welded clamping and fixing device after it has been installed on an EGR cooler diffuser, according to some embodiments of this utility model.

[0027] Figure 2 This is a second-view perspective view of an EGR cooler diffuser and bellows fully welded clamping and fixing device after the EGR cooler diffuser has been installed, according to some embodiments of this utility model.

[0028] Figure 3 The first-view view of the mounting bracket of the EGR cooler diffuser and bellows full-welded clamping and fixing device provided for some embodiments of this utility model after the EGR cooler diffuser is installed.

[0029] Figure 4 This is a second-view perspective view of the mounting bracket of an EGR cooler diffuser and bellows full-welded clamping and fixing device provided for some embodiments of the present invention, after the EGR cooler diffuser has been installed.

[0030] Figure 5 A first-view view of a mounting bracket for a fully welded clamping and fixing device for an EGR cooler diffuser and bellows, provided for some embodiments of this utility model.

[0031] Figure 6 A second-view view of the mounting bracket of an EGR cooler diffuser and bellows fully welded clamping and fixing device provided for some embodiments of this utility model.

[0032] In the diagram: 1. Positioner, 2. Motor, 3. Mounting bracket, 4. EGR cooler body, 5. Base, 6. Plug, 7. Slide rail, 8. First quick clamp, 9. Mounting seat, 10. Second quick clamp, 11. First support seat, 12. Second support seat, 13. Slide table, 14. Third support seat, 15. Air inlet, 16. Air outlet, 17. First support surface, 18. First positioning pin, 19. Second positioning pin, 20. Mounting hole. Detailed Implementation

[0033] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0034] Example 1

[0035] like Figures 1 to 6 As shown, an EGR cooler diffuser and bellows full-weld clamping and fixing device according to the first aspect embodiment of the present invention includes a positioner 1, a motor 2 and a fixing frame 3. The positioner 1 can be a welding positioner in the prior art. The motor 2 is connected to the power input shaft of the positioner 1 through a drive. The motor 2 is used to provide driving force for the positioner 1. The fixing frame 3 is set on the turntable of the positioner 1.

[0036] The mounting bracket 3 includes a base 5, an air supply mechanism, and a cooler fixing mechanism. The base 5 is mounted on the turntable of the positioner 1. Both the air supply mechanism and the cooler fixing mechanism are mounted on the base 5. The cooler fixing mechanism is used to clamp and fix the EGR cooler body 4.

[0037] like Figures 3 to 6 As shown, the gas supply mechanism includes a plug 6, a slide rail 7, and a first quick clamp 8. The slide rail 7 is mounted on the base 5. The plug 6 is wedge-shaped and slidably connected to the slide rail 7. The plug 6 is matched with the air inlet connector of the EGR cooler body 4. The plug 6 is provided with an air inlet 15 and an air outlet 16. The air outlet 16 is located on the side of the plug 6 facing the air inlet connector of the EGR cooler body 4. The air inlet 15 is located on the side of the plug 6 and is connected to the air outlet 16. The air inlet 15 adopts a quick connector structure, which facilitates quick connection to the inert gas supply pipe. The inert gas can be argon. The first quick clamp 8 is located at one end of the slide rail 7. The first quick clamp 8 is used to press the plug 6 against the end of the air inlet connector of the EGR cooler body 4. When the first quick clamp 8 presses against the plug 6, its clamping rod is parallel to the slide rail 7 and is located in the same plane as the slide rail 7.

[0038] In this embodiment, it should be noted that the base 5 is plate-shaped and has multiple mounting holes 20. The mounting holes 20 penetrate the base 5 and are used with bolts to quickly install and fix the base 5 on the turntable of the positioner 1. The plug 6 has a buffer sealing gasket on the side facing the air inlet connector of the EGR cooler body 4.

[0039] Furthermore, the gas supply mechanism also includes a slide table 13, which is slidably connected to the slide rail 7. A plug 6 is installed on the slide table 13. Specifically, the plug 6 is fixed to the slide table 13 by bolts.

[0040] The technical effects achieved by this embodiment are as follows: the EGR cooler 4 can be clamped and fixed using the fixing frame 3, and the angle can be continuously adjusted by the positioner 1, thereby facilitating full welding operations; a gas supply mechanism is provided, and the first quick clamp 8 can be used to press the plug 6 against the end of the air inlet connector of the EGR cooler 4 to seal the air inlet, and then the air supply pipe is connected to the air inlet 15, so that inert gas can be introduced into the EGR cooler 4 through the air outlet 16, thereby maintaining an inert gas atmosphere at the welding part and ensuring welding quality; the whole device has a simple structure, is easy to use and operate, can quickly complete the clamping and fixing of the EGR cooler, and can meet the processing conditions required for full welding processes;

[0041] Full welding creates a continuous and complete weld between the bellows and the connectors. This weld has a strong load-bearing capacity and is less prone to breakage under high tensile, compressive, or vibration conditions, ensuring stable operation of the bellows under high-load and high-vibration conditions. Full welding better meets the requirements for structural stability; the continuous weld effectively prevents media leakage, and the surface of the fully welded workpiece is smooth and free of obvious welding marks, resulting in a more aesthetically pleasing appearance.

[0042] Example 2

[0043] like Figures 1 to 6 As shown in the figure, another EGR cooler diffuser and bellows full-welded clamping and fixing device provided in this embodiment has the same structure as in embodiment 1. Only the different parts are described below.

[0044] In this embodiment, the cooler fixing mechanism includes a second quick clamp 10 and a plurality of support seats. The second quick clamp 10 and the support seats are both disposed on the base 5, and the second quick clamp 10 and the support seats are matched with each other.

[0045] In this embodiment, it should be noted that the support base includes a first support base 11, a second support base 12, and a third support base 14. The first support base 11, the second support base 12, and the third support base 14 are all columnar structures. The height of the second support base 12 is greater than the height of the third support base 14. The second support base 12 is located at the end of the base 5 away from the first quick clamp 8. The third support base 14 is located between the first quick clamp 8 and the second support base 12. The top ends of the first support base 11, the second support base 12, and the third support base 14 are respectively provided with a first support surface 17, a second support surface, and a third support surface. The first support surface 17, the second support surface, and the third support surface are respectively used to support the shell, the first bracket, and the second bracket of the EGR cooler body 4.

[0046] The cooler fixing mechanism also includes a mounting base 9, which is disposed on the base 5. The second quick clamp 10 is mounted on the mounting base 9, such as... Figures 1 to 4 As shown, when clamping and fixing, the second quick clamp 10 acts on the shell of the EGR cooler 4. The second quick clamp 10, together with the first support 11, the second support 12 and the third support 14, can quickly clamp and fix the EGR cooler 4.

[0047] The technical effect achieved by this embodiment is that the cooler fixing mechanism has a simple structure, and the second quick clamp 10 can quickly clamp and fix the EGR cooler, making the operation simple, convenient and fast.

[0048] Example 3

[0049] like Figures 1 to 6As shown in the figure, another EGR cooler diffuser and bellows full-welded clamping and fixing device provided in this embodiment has the same structure as that in embodiment 2. Only the different parts are described below.

[0050] In this embodiment, as Figures 3 to 6 As shown, the first support surface 17, the second support surface, and the third support surface are all inclined surfaces, so that the welding parts can be fully exposed after clamping and fixing.

[0051] In this embodiment, it should be noted that the side of the first support surface 17 is L-shaped. The first support surface 17 is used to support the two sides of the shell of the EGR cooler 4. The second support surface and the third support surface are respectively provided with a first positioning pin 18 and a second positioning pin 19. The first positioning pin 18 and the second positioning pin 19 are respectively matched with the mounting holes 20 on the first bracket and the second bracket.

[0052] The technical effect achieved by this embodiment is that by setting the first positioning pin 18 and the second positioning pin 19, and using them in conjunction with the first support surface 17, the EGR cooler 4 can be quickly positioned and installed.

[0053] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

[0054] The terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Any changes or adjustments to their relative relationships, without substantially altering the technical content, shall also be considered within the scope of implementation of this utility model.

Claims

1. An EGR cooler diffuser to bellows full weld clamping fixture, characterized by, It includes a positioner (1), a motor (2) and a mounting bracket (3), wherein the motor (2) is connected to the power input shaft of the positioner (1) and the mounting bracket (3) is mounted on the turntable of the positioner (1); The fixing frame (3) includes a base (5), an air supply mechanism and a cooler fixing mechanism. The base (5) is set on the turntable of the positioner (1). The air supply mechanism and the cooler fixing mechanism are both set on the base (5). The cooler fixing mechanism is used to clamp and fix the EGR cooler body (4). The air supply mechanism includes a plug (6), a slide rail (7), and a first quick clamp (8). The slide rail (7) is mounted on the base (5). The plug (6) is slidably connected to the slide rail (7). The plug (6) is matched with the air inlet connector of the EGR cooler body (4). The plug (6) is provided with an air inlet (15) and an air outlet (16). The air outlet (16) is located on the side of the plug (6) facing the air inlet connector of the EGR cooler body (4). The air inlet (15) and the air outlet (16) are interconnected. The first quick clamp (8) is located at one end of the slide rail (7). The first quick clamp (8) is used to press the plug (6) against the end of the air inlet connector of the EGR cooler body (4).

2. An EGR cooler diffuser to bellows full weld clamping fixture as described in claim 1, wherein, The plug (6) has a buffer sealing gasket on the side facing the air inlet connector of the EGR cooler body (4).

3. The EGR cooler diffuser and bellows full-welded clamping and fixing device according to claim 1, characterized in that, The gas supply mechanism also includes a slide (13), which is slidably connected to the slide rail (7), and the plug (6) is disposed on the slide (13).

4. An EGR cooler diffuser to bellows full weld clamping fixture as described in claim 1, wherein, The cooler fixing mechanism includes a second quick clamp (10) and a plurality of support seats. The second quick clamp (10) and the support seats are both disposed on the base (5), and the second quick clamp (10) and the support seats are matched with each other.

5. An EGR cooler diffuser to bellows full weld clamping fixture as described in claim 4, wherein, The support base includes a first support base (11), a second support base (12), and a third support base (14). The top ends of the first support base (11), the second support base (12), and the third support base (14) are respectively provided with a first support surface (17), a second support surface, and a third support surface. The first support surface (17), the second support surface, and the third support surface are respectively used to support the shell, the first bracket, and the second bracket of the EGR cooler body (4).

6. The EGR cooler diffuser and bellows full-welded clamping and fixing device according to claim 5, characterized in that, The first support surface (17), the second support surface and the third support surface are all inclined surfaces.

7. An EGR cooler diffuser to bellows full weld clamping fixture as described in claim 6, wherein, The side of the first support surface (17) is L-shaped.

8. The EGR cooler diffuser and bellows full-welded clamping and fixing device according to claim 6, characterized in that, The second support surface and the third support surface are respectively provided with a first positioning pin (18) and a second positioning pin (19), and the first positioning pin (18) and the second positioning pin (19) are respectively matched with the mounting holes (20) on the first bracket and the second bracket.

9. An EGR cooler diffuser to bellows full weld clamping fixture as described in claim 4, wherein, The cooler fixing mechanism also includes a mounting base (9), which is disposed on the base (5), and the second quick clamp (10) is mounted on the mounting base (9).

10. An EGR cooler diffuser and bellows full weld clamping fixture as described in claim 1, wherein, The base (5) is plate-shaped and has multiple mounting holes (20).

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