An automobile radiator water chamber structure formed by bending and welding

Abstract

This utility model relates to the field of automotive cooling equipment technology, specifically a water chamber structure for an automotive radiator formed by bending and welding. It includes a radiator body with upper and lower clamping plates installed at both the top and bottom. An integral water chamber structure is installed on both sides of the radiator body. By decomposing the water chamber into multiple rectangular extension sections and bending them step-by-step, instead of traditional one-piece stamping, it avoids forming defects caused by stress concentration in the depth direction, thus improving the product yield. Each extension section is precisely matched with bending angles and dimensions, combined with a self-locking lap joint and brazing structure, enhancing welding strength and reducing brazing leakage rate. The inlet / outlet and mounting holes are formed in one piece, reducing processing time and improving assembly adaptability. The single-piece sheet bending and welding design reduces scrap material, improves material utilization, and lowers overall production costs, effectively solving the problems of numerous forming defects, poor sealing, difficult assembly, and high cost associated with traditional water chambers.

Description

Technical Field

[0001] This utility model relates to the field of automotive cooling equipment technology, and in particular to a water chamber structure for an automotive radiator formed by bending and welding. Background Technology

[0002] In automotive cooling systems, the radiator water chamber is a key component for coolant storage and circulation, and its structural strength and sealing performance directly affect the reliability of the cooling system. Currently, automotive radiator water chambers are often formed by a single piece of aluminum sheet through a stamping process, which directly forms the three-dimensional structure of the water chamber in a single stamping operation.

[0003] However, for cuboid water chambers with specific depths and complex structures, one-piece stamping has obvious drawbacks. On the one hand, during the stamping process, the deformation of the sheet metal in the depth direction is large, which can easily lead to local stress concentration, resulting in forming defects such as cracking and wrinkling, and reducing the product qualification rate. On the other hand, one-piece molding makes it difficult to accurately control the positional accuracy of the water chamber inlet and outlet openings and the mounting hole openings, which affects the subsequent assembly compatibility with other components of the radiator.

[0004] While some existing technologies attempt to improve the water chamber forming effect through step-by-step processing, most of them do not systematically consider the bending fit between components, the design of welding interfaces, and the dimensional matching relationship, making it difficult to effectively solve core issues such as forming defects, assembly accuracy, and sealing performance. Therefore, there is an urgent need for a new automotive radiator water chamber structure and forming process to overcome the shortcomings of existing technologies. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides a water chamber structure for automotive radiators formed by bending and welding, which effectively solves the problems of numerous forming defects, poor sealing, difficult assembly, and high cost of traditional water chambers.

[0006] The technical solution of this utility model is:

[0007] A water chamber structure for an automotive radiator formed by bending and welding includes a radiator body, with upper and lower clamping plates installed at the top and bottom of the radiator body. An integral water chamber structure is installed on both sides of the radiator body. A water inlet pipe is installed on the front surface of one integral water chamber structure, and a water outlet pipe is installed on the front surface of the other integral water chamber structure. The two ends of the upper and lower clamping plates are respectively fixed to the inner top and bottom of the two integral water chamber structures.

[0008] In a further technical solution, the overall water chamber structure includes a planar unfolded body of a given shape obtained by blanking a single aluminum plate. Specifically, it is divided into inlet and outlet openings, mounting holes, the bottom of the water chamber, and multiple rectangular extensions around it. The multiple rectangular extensions are respectively a middle rectangular extension forming the side wall in the length direction of the water chamber, two end rectangular extensions forming the side wall in the width direction of the water chamber, and a welded rectangular extension connecting adjacent side walls of the water chamber. The middle rectangular extension is bent to form the side wall in the length direction of the water chamber and forms the U-shaped main structure of the water chamber. The welded rectangular extension is connected to the two end rectangular extensions and is bent to be perpendicular to the two end rectangular extensions. The two end rectangular extensions are bent last, with the direction facing the side opening of the U-shaped main structure of the water chamber. After all extensions are bent, the two end rectangular extensions are perpendicularly attached to the middle rectangular extension, and the welded rectangular extension is parallel to the inner wall of the middle rectangular extension, and is welded to form the overall water chamber structure.

[0009] In a further technical solution, the middle rectangular extension is bent along the bending line of the middle rectangular extension, the two end rectangular extensions are bent along the bending lines of the two end rectangular extensions, and the welded rectangular extension is bent along the bending line of the welded rectangular extension, with the same bending angle of 90 degrees.

[0010] In a further technical solution, the length L of the two end rectangular extensions is matched with the width W of the middle rectangular extension, which serves as the depth of the radiator water chamber.

[0011] In a further technical solution, the relationship between the length L3 of the rectangular extension of the welding section and the length L2 of the rectangular extensions at both ends is L3 = (0.8~0.9)*L2, and the relationship between the width W3 of the rectangular extension of the welding section and the width W1 of the rectangular extension of the middle section is W3 = (0.2~0.3)*W1.

[0012] In a further technical solution, the rectangular extensions at both ends are bent and folded into the water chamber, where they fit tightly against the inner wall of the U-shaped main structure to form a self-locking overlapping interface.

[0013] In a further technical solution, the aluminum sheet is a 3-series aluminum alloy with a thickness of 1.5mm.

[0014] The beneficial effects of this utility model are:

[0015] By decomposing the water chamber into multiple rectangular extension sections and bending them step by step, instead of the traditional one-piece stamping, forming defects caused by stress concentration in the depth direction are avoided, thus improving the product yield. Each extension section is precisely matched with bending angle and size, and combined with self-locking lap joints and brazing structures, the welding strength is enhanced and the brazing leakage rate is reduced. The inlet, outlet and mounting hole are formed in one piece, reducing processing time and improving assembly adaptability. The single-piece sheet bending and welding design reduces scrap material, improves material utilization, and reduces overall production costs, effectively solving the problems of many forming defects, poor sealing, difficult assembly, and high cost of traditional water chambers. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0017] Figure 2 This is a schematic diagram of the overall planar unfolded structure of an embodiment of this utility model;

[0018] Figure 3 This is a schematic diagram of the overall assembly structure of an embodiment of this utility model.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Overall water chamber structure; 101. Bottom of water chamber; 102. Middle section rectangular extension; 103. Both end sections rectangular extension; 104. Welded section rectangular extension; 105. Inlet and outlet openings and mounting holes; 106. Bending line of welded section rectangular extension; 107. Bending line of both end sections rectangular extension; 108. Bending line of middle section rectangular extension; 109. U-shaped main structure; 2. Inlet pipe; 3. Flat pipe mounting plate; 4. Upper and lower clamping plates; 5. Outlet pipe. Detailed Implementation

[0021] The embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0022] Example:

[0023] like Figures 1-3As shown, a water chamber structure for an automotive radiator formed by bending and welding includes a radiator body. Upper and lower clamping plates 4 are installed at the top and bottom of the radiator body. Integral water chamber structures 1 are installed on both sides of the radiator body. A water inlet pipe 2 is installed on the front surface of one integral water chamber structure 1, and a water outlet pipe 5 is installed on the front surface of the other integral water chamber structure 1. The two ends of the upper and lower clamping plates 4 are respectively fixed to the inner top and bottom of the two integral water chamber structures 1. A flat tube mounting plate 3 is provided inside the integral water chamber structure 1. The integral water chamber structure 1 includes a planar unfolded body of a given shape obtained by blanking a single piece of aluminum sheet. Specifically, it is divided into water chamber inlet / outlet openings and mounting holes 105, a water chamber bottom 101, and multiple rectangular extensions around it. These multiple rectangular extensions are: a middle rectangular extension 102 forming the sidewall in the length direction of the water chamber; two end rectangular extensions 103 forming the sidewall in the width direction of the water chamber; and a welded rectangular extension 104 connecting adjacent sidewalls of the water chamber.

[0024] In another embodiment, such as Figure 1 As shown, 1.5mm thick 3-series aluminum alloy sheet was selected as the raw material for water chamber processing. This material has good formability and corrosion resistance.

[0025] In another embodiment, such as Figure 1 As shown, a 3-series aluminum alloy sheet is placed on a CNC punching machine and punched to obtain a planar unfolded body according to the pre-designed water chamber structure dimensions. In this process, the water chamber inlet and outlet openings and the installation hole opening 105 are completed simultaneously. The shape, size and position of the openings are strictly positioned according to the design drawings to ensure that the opening accuracy error is controlled within ±0.05mm.

[0026] In another embodiment, such as Figure 2 As shown, the planar unfolded body forms multiple rectangular extensions around the bottom 101 of the water chamber, including a middle rectangular extension 102 forming the sidewall in the length direction of the water chamber, two rectangular extensions 103 forming the sidewall in the width direction of the water chamber, and a welded rectangular extension 104 connecting adjacent sidewalls. The dimensions of each extension are precisely designed according to the overall structure of the water chamber. The length L2 of the two rectangular extensions matches the width W1 of the middle rectangular extension. The length L3 of the welded rectangular extension satisfies a specific proportional relationship with the length L2 of the two rectangular extensions and the width W3 of the middle rectangular extension. The relationship between the length L3 of the welded rectangular extension 104 and the length L2 of the two rectangular extensions is L3 = (0.8~0.9)*L2, and the relationship between the width W3 of the welded rectangular extension 104 and the width W1 of the middle rectangular extension 102 is W3 = (0.2~0.3)*W1 to ensure the accuracy of subsequent bending and welding.

[0027] In another embodiment, such as Figure 2 As shown, the rectangular extension 102 of the middle section of the planar unfolded body is placed on a bending machine, and the bending operation is performed on it by the mold of the bending machine. The bending angle is set to 90° to form the side wall in the length direction of the water chamber, thereby forming the U-shaped main structure of the water chamber. During the bending process, the positioning fixture is used to ensure the accuracy of the bending position and avoid deviation.

[0028] In another embodiment, such as Figure 2 As shown, the rectangular extension of the welded section is connected to the rectangular extensions at both ends. The rectangular extension of the welded section is first bent on the bending machine to make it perpendicular to the rectangular extensions at both ends. Similarly, the bending angle is controlled at 90°. After bending, the position of the rectangular extension of the welded section must be consistent with the design drawings to ensure the subsequent bonding effect with the inner wall of the water chamber.

[0029] In another embodiment, such as Figure 2 As shown, the rectangular extensions at both ends are bent, with the bending direction facing the side opening of the U-shaped main structure of the water chamber, and the bending angle is still 90°. After the above three bending operations, all extensions are bent. At this time, the rectangular extensions at both ends are perpendicularly attached to the rectangular extension in the middle section, and the rectangular extension of the welded section is parallel to the inner wall of the rectangular extension in the middle section, forming a complete preliminary structure of the water chamber.

[0030] The bent preliminary water chamber structure is placed on a specialized welding fixture, ensuring accurate positioning of all components. Using flame brazing, aluminum-silicon alloy brazing filler metal is placed at the interface between the rectangular extensions of the welding section and the middle rectangular extension. The flame brazing equipment is turned on, raising the temperature to fully melt the filler metal and fill the weld gap. During welding, the flame is moved evenly to ensure uniform heating of the weld, forming a continuous and dense brazed layer with a thickness of not less than 0.2 mm. After welding, the water chamber is allowed to cool naturally to room temperature, resulting in the complete automotive radiator water chamber structure.

[0031] The above embodiments merely illustrate specific implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. A water chamber structure of an automobile radiator formed by bending and welding, comprising a radiator main body, characterized in that: The top and bottom of the radiator body are equipped with upper and lower clamping plates (4), and both sides of the radiator body are equipped with an integral water chamber structure (1). One of the integral water chamber structures (1) has an inlet pipe (2) installed on its front surface, and the other integral water chamber structure (1) has an outlet pipe (5) installed on its front surface. The two ends of the two upper and lower clamping plates (4) are respectively fixed to the top and bottom of the inner side of the two integral water chamber structures (1). The interior of the integral water chamber structure (1) is provided with a flat tube mounting plate (3).

2. The automobile radiator water chamber structure formed by bending and welding according to claim 1, characterized in that: The overall water chamber structure (1) includes a planar unfolded body of a given shape obtained by blanking a single aluminum plate. Specifically, it is divided into an inlet / outlet opening and a mounting hole opening (105), a water chamber bottom (101), and multiple rectangular extensions around it. The multiple rectangular extensions are respectively a middle rectangular extension (102) forming the side wall in the length direction of the water chamber, two end rectangular extensions (103) forming the side wall in the width direction of the water chamber, and a welded rectangular extension (104) connecting adjacent side walls of the water chamber. The middle rectangular extension (102) is bent to form the side wall in the length direction of the water chamber and forms the water chamber. U-shaped main structure (109); the welded section rectangular extension (104) is connected to the two end rectangular extensions (103), and after being bent, it is perpendicular to the two end rectangular extensions (103). The two end rectangular extensions (103) are bent last, with the direction facing the side opening of the U-shaped main structure (109) of the water chamber. After all extensions are bent, the two end rectangular extensions (103) are perpendicularly attached to the middle rectangular extension (102), and the welded section rectangular extension (104) is parallel to the inner wall of the middle rectangular extension (102), and the integral water chamber structure (1) is formed by welding.

3. A water chamber structure of an automobile radiator formed by bending and welding according to claim 2, characterized in that: The middle rectangular extension (102) is bent along the bending line (108) of the middle rectangular extension, the two end rectangular extensions (103) are bent along the bending lines (107) of the two end rectangular extensions, and the welded rectangular extension (104) is bent along the bending line (106) of the welded rectangular extension. The bending angles are the same, all being ninety degrees.

4. The automobile radiator water chamber structure formed by bending and welding according to claim 2, characterized in that: The length L2 of the two end rectangular extensions (103) matches the width W1 of the middle rectangular extension (102), which serves as the depth of the radiator water chamber.

5. The automobile radiator water chamber structure formed by bending and welding according to claim 2, characterized in that: The relationship between the length L3 of the rectangular extension (104) of the welding section and the length L2 of the rectangular extensions (103) at both ends is L3 = (0.8~0.9)*L2, and the relationship between the width W3 of the rectangular extension (104) of the welding section and the width W1 of the rectangular extension (102) in the middle section is W3 = (0.2~0.3)*W1.

6. A bent and welded formed automotive radiator water chamber structure according to claim 2, wherein: The rectangular extensions (103) at both ends are bent and folded into the water chamber, and then closely fit with the inner wall of the U-shaped main structure (109) to form a self-locking overlapping interface.

7. The automobile radiator water chamber structure formed by bending and welding according to claim 1, characterized in that: The aluminum sheet is made of 3-series aluminum alloy and has a thickness of 1.5 mm.

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