Core body welding tool for exhaust gas recirculation cooler and using method of core body welding tool
By designing the core welding tool for the exhaust gas recirculation cooler of the double-layer gas circuit protection pipe, the problem of inability to be separated after the shell and the core is integrated, and the lossless disassembly and reusable welding tool is achieved, avoiding the problem of failure. Necessary losses.
Patent Information
- Application Number
- CN202411543402.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2025-01-07
AI Technical Summary
During the manufacturing of waste gas recirculation coolers with cast aluminum shells and laser welded core assembled structures, the shell and the core cannot be disassembled, resulting in the shell being destroyed every time the model is replaced and the first piece is tested. To remove the core, unnecessary losses are caused.
Design a core welding tool for exhaust gas recirculation cooler of double-layer gas circuit protection pipe, including two tooling components, forming a shell on the core, and filling the welding protective gas through the air inlet and outlet port and recycling, the tooling components can be detached after welding, for lossless disassembly and reusable.
It effectively avoids the waste of the shell, realizes the lossless disassembly and reuse of the welding tool, and reduces losses in the production process.
Smart Images
Figure CN119260169A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of exhaust gas recirculation coolers for commercial vehicles, and in particular to a core welding tool for an exhaust gas recirculation cooler and a use method thereof. Background Art
[0002] With the implementation of the National VI Standard, exhaust gas recirculation coolers are gradually being promoted and applied. However, the manufacturing process of exhaust gas recirculation coolers with cast aluminum shells and laser-welded core assembly structures is extremely complicated. The core must be assembled to the shell before laser welding. After laser welding, the shell and the core are integrated and cannot be separated. During production debugging and first-piece destructive testing after each model change, the core must be taken out by destroying the shell, which will result in the scrapping of multiple shells, resulting in unnecessary losses. Summary of the invention
[0003] The purpose of the present invention is to address the deficiencies of the above-mentioned technology and provide a core welding tool for an exhaust gas recirculation cooler and a method of using the same, which can replace the shell and complete the function of the shell during laser welding. After welding is completed, the tool can be removed and recycled to avoid unnecessary waste.
[0004] To achieve the above-mentioned purpose, the core welding tool for the double-layer gas path protection tube exhaust gas recirculation cooler designed by the present invention includes two tooling components, and the two tooling components are enclosed to form a shell that is sleeved on the core. The top and bottom of the tooling component are provided with two end surfaces connected to the main piece of the core. An air inlet and an air outlet are arranged on the tooling component, and the air inlet and the air outlet are respectively located at the lower end and the upper end of the shell.
[0005] Preferably, the contact surface between the two tooling components is sealed after enclosure.
[0006] Preferably, both end faces of the tooling assembly are sealed with the main piece of the core body.
[0007] Preferably, corresponding mounting rings are provided on the outer sides of the two tooling components at positions close to the contact surfaces, and the two tooling components are inserted into the mounting rings by mounting bolts and fixed using mounting nuts.
[0008] Preferably, a distance is left between the contact surface of the mounting ring and the tooling assembly to avoid wear of the contact surface resulting in failure to tighten.
[0009] Preferably, the two tooling components are provided with corresponding positioning pins and positioning grooves on the contact surfaces for limiting the positions and preventing the tooling components from being misplaced when being combined.
[0010] Preferably, a plurality of fixing holes corresponding to the mounting holes on the main sheet are provided on the end surface of the tooling assembly, and the tooling assembly is fixed by positioning bolts passing through the fixing holes and the mounting holes on the main sheet.
[0011] Preferably, each end surface of the two tooling components is provided with at least one fixing hole.
[0012] Preferably, the air inlet and the air outlet are respectively located on the two tooling components, or on one tooling component.
[0013] A method for using a core welding tool for an exhaust gas recirculation cooler comprises: enclosing two tooling components to form a shell, sleeved on the core, connecting both end faces of the tooling component to a main plate of the core; during welding, charging welding shielding gas from the air inlet, recovering the welding shielding gas from the air outlet, charging nitrogen from the lower end of the core, and discharging nitrogen from the upper end of the core; after welding is completed, releasing the connection between the two end faces of the tooling component and the main plate of the core, dividing the shell into the two tooling components, thereby realizing non-destructive disassembly and reuse of the welding tool.
[0014] Compared with the prior art, the present invention has the following advantages:
[0015] 1. It can replace the shell and complete the role of the shell during laser welding. After welding, the tooling can be removed and recycled to avoid unnecessary waste;
[0016] 2. By setting up the flow channel of welding shielding gas, it is convenient to collect and recycle welding and gas after use. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a structural schematic diagram of a core welding tool for an exhaust gas recirculation cooler of the present invention;
[0018] Figure 2 It is a schematic diagram of the use of the core welding tool for the exhaust gas recirculation cooler of the present invention.
[0019] The components in the figure are numbered as follows:
[0020] Tooling assembly 1, core 2, shell 3, main piece 4, end face 5, air inlet 6, air outlet 7, contact surface 8, mounting ring 9, mounting bolt 10, mounting nut 11, locating pin 12, mounting hole 13, fixing hole 14, locating bolt 15. DETAILED DESCRIPTION
[0021] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0022] Example 1
[0023] like Figure 1 As shown, a core welding tool for an exhaust gas recirculation cooler includes two tooling components 1, which enclose a shell 3 that is sleeved on a core 2. The top and bottom of the tooling component 1 are provided with two end surfaces 5 connected to a main piece 4 of the core 2. An air inlet 6 and an air outlet 7 are arranged on the tooling component 1, and the air inlet 6 and the air outlet 7 are respectively located at the lower end and the upper end of the shell 3.
[0024] When using, Figure 2 As shown, two tooling components 1 are enclosed to form a shell 3, and the shell 3 is placed on the core body 2. The two end faces 5 of the tooling component 1 are connected to the main piece 4 of the core body 2. During welding, welding shielding gas is filled from the air inlet 6, and the welding shielding gas is recovered from the air outlet 7. Nitrogen is filled from the lower end of the core body 2 and discharged from the upper end of the core body 2. After welding is completed, the connection between the two end faces 5 of the tooling component 1 and the main piece 4 of the core body 2 is released, and the shell 3 is divided into two tooling components 1, so that the non-destructive disassembly and reuse of the welding tool can be realized.
[0025] Example 2
[0026] like Figure 1 As shown, a core welding tool for an exhaust gas recirculation cooler includes two tooling components 1, which enclose a shell 3 that is sleeved on a core 2. The top and bottom of the tooling component 1 are provided with two end surfaces 5 connected to a main piece 4 of the core 2. An air inlet 6 and an air outlet 7 are arranged on the tooling component 1, and the air inlet 6 and the air outlet 7 are respectively located at the lower end and the upper end of the shell 3.
[0027] In this embodiment, the contact surface 8 between the two tooling components 1 is sealed after enclosure, and the two end faces 5 of the tooling components 1 are sealed with the main piece 4 of the core body 2. The above sealing can be achieved with a sealing gasket. Through sealing, the dissipation of welding shielding gas is avoided and waste is reduced.
[0028] When this embodiment is used, Figure 2 As shown, two tooling components 1 are enclosed to form a shell 3, and the shell 3 is placed on the core body 2. The two end faces 5 of the tooling component 1 are connected to the main piece 4 of the core body 2. During welding, welding shielding gas is filled from the air inlet 6, and the welding shielding gas is recovered from the air outlet 7. Nitrogen is filled from the lower end of the core body 2 and discharged from the upper end of the core body 2. After welding is completed, the connection between the two end faces 5 of the tooling component 1 and the main piece 4 of the core body 2 is released, and the shell 3 is divided into two tooling components 1, so that the non-destructive disassembly and reuse of the welding tool can be realized.
[0029] Example 3
[0030] like Figure 1As shown, a core welding tool for an exhaust gas recirculation cooler includes two tooling components 1, which enclose a shell 3 that is sleeved on a core 2. The top and bottom of the tooling component 1 are provided with two end surfaces 5 connected to a main piece 4 of the core 2. An air inlet 6 and an air outlet 7 are arranged on the tooling component 1, and the air inlet 6 and the air outlet 7 are respectively located at the lower end and the upper end of the shell 3.
[0031] In this embodiment, the contact surface 8 between the two tooling components 1 is sealed after enclosure, and the two end faces 5 of the tooling components 1 are sealed with the main piece 4 of the core body 2. The above sealing can be achieved with a sealing gasket. Through sealing, the dissipation of welding shielding gas is avoided and waste is reduced.
[0032] In this embodiment, corresponding mounting rings 9 are provided on the outer sides of the two tooling components 1 near the contact surface 8. The two tooling components 1 are inserted into the mounting rings 9 by mounting bolts 10 and fixed using mounting nuts 11, so that the tooling components 1 are easy to assemble or disassemble.
[0033] In this embodiment, when used, Figure 2 As shown, two tooling components 1 are enclosed to form a shell 3, and the shell 3 is placed on the core body 2. The two end faces 5 of the tooling component 1 are connected to the main piece 4 of the core body 2. During welding, welding shielding gas is filled from the air inlet 6, and the welding shielding gas is recovered from the air outlet 7. Nitrogen is filled from the lower end of the core body 2 and discharged from the upper end of the core body 2. After welding is completed, the connection between the two end faces 5 of the tooling component 1 and the main piece 4 of the core body 2 is released, and the shell 3 is divided into two tooling components 1, so that the non-destructive disassembly and reuse of the welding tool can be realized.
[0034] Example 4
[0035] like Figure 1 As shown, a core welding tool for an exhaust gas recirculation cooler includes two tooling components 1, which enclose a shell 3 that is sleeved on a core 2. The top and bottom of the tooling component 1 are provided with two end surfaces 5 connected to a main piece 4 of the core 2. An air inlet 6 and an air outlet 7 are arranged on the tooling component 1, and the air inlet 6 and the air outlet 7 are respectively located at the lower end and the upper end of the shell 3.
[0036] In this embodiment, the contact surface 8 between the two tooling components 1 is sealed after enclosure, and the two end faces 5 of the tooling components 1 are sealed with the main piece 4 of the core body 2. The above sealing can be achieved with a sealing gasket. Through sealing, the dissipation of welding shielding gas is avoided and waste is reduced.
[0037] In this embodiment, corresponding mounting rings 9 are provided on the outer sides of the two tooling components 1 near the contact surface 8. The two tooling components 1 are inserted into the mounting rings 9 by mounting bolts 10 and fixed using mounting nuts 11. The tooling components 1 are easy to assemble or disassemble. A distance is left between the mounting rings 9 and the contact surface 8 of the tooling components 1, which is 1 mm in this embodiment, to avoid wear of the contact surface 8 resulting in failure to tighten.
[0038] In this embodiment, the two tooling components 1 are provided with corresponding positioning pins 12 and positioning grooves on the contact surface 8. In this embodiment, there are 6 Φ3 positioning pins 12 for limiting and preventing the tooling components 1 from being misaligned in combination.
[0039] In this embodiment, when used, Figure 2 As shown, two tooling components 1 are enclosed to form a shell 3, and the shell 3 is placed on the core body 2. The two end faces 5 of the tooling component 1 are connected to the main piece 4 of the core body 2. During welding, welding shielding gas is filled from the air inlet 6, and the welding shielding gas is recovered from the air outlet 7. Nitrogen is filled from the lower end of the core body 2 and discharged from the upper end of the core body 2. After welding is completed, the connection between the two end faces 5 of the tooling component 1 and the main piece 4 of the core body 2 is released, and the shell 3 is divided into two tooling components 1, so that the non-destructive disassembly and reuse of the welding tool can be realized.
[0040] Example 5
[0041] like Figure 1 As shown, a core welding tool for an exhaust gas recirculation cooler includes two tooling components 1, which enclose a shell 3 that is sleeved on a core 2. The top and bottom of the tooling component 1 are provided with two end surfaces 5 connected to a main piece 4 of the core 2. An air inlet 6 and an air outlet 7 are arranged on the tooling component 1, and the air inlet 6 and the air outlet 7 are respectively located at the lower end and the upper end of the shell 3.
[0042] In this embodiment, the contact surface 8 between the two tooling components 1 is sealed after enclosure, and the two end faces 5 of the tooling components 1 are sealed with the main piece 4 of the core body 2. The above sealing can be achieved with a sealing gasket. Through sealing, the dissipation of welding shielding gas is avoided and waste is reduced.
[0043] In this embodiment, corresponding mounting rings 9 are provided on the outer sides of the two tooling components 1 near the contact surface 8. The two tooling components 1 are inserted into the mounting rings 9 by mounting bolts 10 and fixed using mounting nuts 11. The tooling components 1 are easy to assemble or disassemble. A distance is left between the mounting rings 9 and the contact surface 8 of the tooling components 1, which is 1 mm in this embodiment, to avoid wear of the contact surface 8 resulting in failure to tighten.
[0044] In this embodiment, the two tooling components 1 are provided with corresponding positioning pins 12 and positioning grooves on the contact surface 8. In this embodiment, there are 6 Φ3 positioning pins 12 for limiting and preventing the tooling components 1 from being misaligned in combination.
[0045] In this embodiment, a plurality of fixing holes 14 corresponding to the mounting holes 13 on the main piece 4 are provided on the end face 5 of the tooling assembly 1, and the tooling assembly 1 is fixed by positioning bolts 15 passing through the fixing holes 14 and the mounting holes 13 on the main piece 4, wherein the end faces 5 of the two tooling assemblies 1 are each provided with at least one fixing hole 14.
[0046] In this embodiment, when used, Figure 2 As shown, two tooling components 1 are enclosed to form a shell 3, and the shell 3 is placed on the core body 2. The two end faces 5 of the tooling component 1 are connected to the main piece 4 of the core body 2. During welding, welding shielding gas is filled from the air inlet 6, and the welding shielding gas is recovered from the air outlet 7. Nitrogen is filled from the lower end of the core body 2 and discharged from the upper end of the core body 2. After welding is completed, the connection between the two end faces 5 of the tooling component 1 and the main piece 4 of the core body 2 is released, and the shell 3 is divided into two tooling components 1, so that the non-destructive disassembly and reuse of the welding tool can be realized.
[0047] In the above embodiment, the air inlet 6 and the air outlet 7 may be located on two tooling components 1 respectively, or may be located on one tooling component 1 .
[0048] In addition, in the above embodiment, in order to ensure that the core welding tool can be interchangeable with the product shell and used on the same equipment, the functional surface and installation point of the tool assembly 1 are consistent with the product shell. Among them, the wall thickness of the tool assembly 1 is 6mm, and because the welding equipment will clamp the core 2, the wall thickness of the end face 5 is 10mm to ensure sufficient strength.
Claims
1. A core welding tool for an exhaust gas recirculation cooler, comprising two tooling components (1), characterized in that: The two tooling components (1) are combined to form a shell (3) which is sleeved on the core (2); the top and bottom of the tooling component (1) are provided with two end surfaces (5) connected to the main plate (4) of the core (2); an air inlet (6) and an air outlet (7) are arranged on the tooling component (1); the air inlet (6) and the air outlet (7) are respectively located at the lower end and the upper end of the shell (3).
2. The core welding tool for the exhaust gas recirculation cooler according to claim 1, characterized in that: The contact surface (8) between the two tooling components (1) is sealed after being enclosed.
3. The core welding tool for the exhaust gas recirculation cooler according to claim 1, characterized in that: Both end surfaces (5) of the tooling assembly (1) are sealed with the main piece (4) of the core body (2).
4. The core welding tool for the exhaust gas recirculation cooler according to claim 1, characterized in that: The two tooling components (1) are each provided with a corresponding mounting ring (9) at a position close to the contact surface (8) on the outside. The two tooling components (1) are inserted into the mounting ring (9) via mounting bolts (10) and fixed using mounting nuts (11).
5. The core welding tool for the exhaust gas recirculation cooler according to claim 4, characterized in that: A distance is left between the mounting ring (9) and the contact surface (8) of the tooling assembly (1).
6. The core welding tool for the exhaust gas recirculation cooler according to claim 1, characterized in that: The two tooling components (1) are provided with corresponding positioning pins (12) and positioning grooves on the contact surface (8).
7. The core welding tool for the exhaust gas recirculation cooler according to claim 1, characterized in that: A plurality of fixing holes (14) corresponding to the mounting holes (13) on the main plate (4) are provided on the end surface (5) of the tooling assembly (1), and the tooling assembly (1) is fixed by positioning bolts (15) passing through the fixing holes (14) and the mounting holes (13) on the main plate (4).
8. The core welding tool for the exhaust gas recirculation cooler according to claim 7, characterized in that: The end faces (5) of the two tooling components (1) are each provided with at least one fixing hole (14).
9. The core welding tool for the exhaust gas recirculation cooler according to claim 1, characterized in that: The air inlet (6) and the air outlet (7) are respectively located on the two tooling components (1), or on one tooling component (1).
10. A method for using the core welding tool for an exhaust gas recirculation cooler as claimed in claim 1, characterized in that: The two tooling assemblies (1) are enclosed to form a shell (3), the shell (3) is sleeved on the core (2), and the two end faces (5) of the tooling assembly (1) are connected to the main piece (4) of the core (2). During welding, welding shielding gas is charged from the air inlet (6), the welding shielding gas is recovered from the air outlet (7), nitrogen is charged from the lower end of the core (2), and the nitrogen is discharged from the upper end of the core (2); after welding is completed, the connection between the two end faces (5) of the tooling assembly (1) and the main piece (4) of the core (2) is released, and the shell (3) is separated into the two tooling assemblies (1), thereby realizing non-destructive disassembly and reuse of the welding tool.