Flexible elastic drawing wire for brazing clamping of heat exchanger
By designing a flexible and elastic wire drawing W-shaped structure, the problem of uneven clamping force during the brazing of aluminum heat exchanger cores was solved, achieving a low-cost clamping effect that allows for repeated use at high temperatures, and preventing fin collapse and part misalignment.
Patent Information
- Application Number
- CN202423055974.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-10
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-12-10
AI Technical Summary
During the brazing process of aluminum heat exchanger cores in automotive thermal systems, the difference in thermal expansion coefficients between aluminum products and stainless steel clamps leads to uneven clamping force, which can easily cause defects such as fin collapse and deformation or part misalignment. Existing solutions are costly and complex to maintain.
It adopts flexible elastic wire drawing, and high temperature resistant stainless steel wire is bent into shape and designed into a W-shaped structure. The included angle between the two wire drawing bodies is 140°, and the claws are at a 90° angle to the wire drawing body. It can adapt to the thermal expansion and cooling contraction of the product during high temperature brazing and maintain an appropriate clamping force.
It effectively avoids defects such as fin collapse and part misalignment, reduces manufacturing and maintenance costs, has a simple structure, and is suitable for repeated use at high temperatures.
Smart Images
Figure CN223492273U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of brazing clamping fixtures for heat exchangers, specifically a flexible elastic wire for brazing clamping of heat exchangers. Background Technology
[0002] Currently, in the production process of aluminum heat exchanger cores for automotive thermal systems, such as radiator cores, the product needs to be heated to about 600℃ and then cooled to room temperature for brazing under a protective atmosphere or vacuum. Rigid stainless steel welding fixtures are generally used to clamp the product for brazing.
[0003] Due to the significant difference in thermal expansion coefficients between aluminum products and stainless steel clamps, problems such as excessive clamping force during heating and insufficient clamping force during cooling can occur. Brazed products are prone to defects such as fin collapse and deformation, stripping, and misalignment of parts. Some solutions use clamping fixtures made of multiple high-temperature resistant springs, but these fixtures are very expensive to manufacture, use, and maintain, and replacement costs are extremely high after a certain period of repeated use. Therefore, this application proposes a flexible elastic wire for brazing clamping of heat exchangers to solve the above problems. Utility Model Content
[0004] To address the shortcomings of existing technologies, this utility model provides a flexible elastic wire for brazing clamping of heat exchangers, which has the advantages of elastic tensile deformation and moderate clamping force, and solves the problems of excessive clamping force during heating and insufficient clamping force during cooling.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a flexible elastic wire for brazing clamping of a heat exchanger, comprising a core body, wherein claws are fitted together on both the front and rear sides of the core body, and a connecting component for connecting the two claws is provided on the top of the core body;
[0006] The connecting assembly includes a V-shaped intermediate flexible structure that fits onto the upper surface of the core body, with two wire drawing bodies welded to one end of the intermediate flexible structure facing the two claws.
[0007] Furthermore, the intermediate flexible structure is integrally formed by bending the two wire drawing bodies, and its cross-sectional shape is W-shaped.
[0008] Furthermore, the included angle between the two wire drawing bodies is 140°.
[0009] Furthermore, the two claws are respectively vertically disposed at opposite ends of the two wire drawing bodies.
[0010] Furthermore, both of the claws and the two wire drawing bodies are at a 90° angle.
[0011] Furthermore, both of the drawn wires are attached to the upper surface of the intermediate flexible structure.
[0012] Compared with the prior art, the technical solution of this application has the following beneficial effects:
[0013] This heat exchanger uses flexible elastic wire for brazing clamping. The high-temperature resistant stainless steel wire is bent to meet the requirements of repeated use at brazing temperatures up to 600℃ while maintaining its elasticity. The two sides of the wire form an angle of approximately 140° to facilitate greater tensile deformation. This, together with the central flexible structure, maintains a suitable clamping force on the product during brazing and adapts to thermal expansion and contraction. The opposite ends of the two wires form a 90° angle with the two jaws to hook and clamp the two ends of the product core, keeping the wires flat against the product core surface when clamped. This ensures the product remains in a suitable clamping state during brazing, eliminating defects such as fin collapse, strip loss, and misalignment of parts. Furthermore, it features a simple structure and low manufacturing and maintenance costs. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the intermediate flexible structure of this utility model being clamped.
[0015] Figure 2 This is a three-dimensional view of the intermediate flexible structure of this utility model;
[0016] Figure 3 This is a top view of the structure of this utility model;
[0017] Figure 4 This is a front view of the structure of this utility model.
[0018] In the diagram: 1. Intermediate flexible structure, 2. Wire drawing body, 3. Clamping claw, 4. Core body. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0020] Please see Figures 1 to 4The flexible elastic wire for brazing clamping of a heat exchanger in this embodiment includes a core body 4, with claws 3 attached to both the front and rear sides of the core body 4, and a connecting component for connecting the two claws 3 is provided on the top of the core body 4.
[0021] The connecting assembly includes a V-shaped intermediate flexible structure 1 that fits onto the upper surface of the core body 4. Two wire drawing bodies 2 are welded to one end of the intermediate flexible structure 1 facing the two claws 3 respectively. The heat exchanger is made of flexible elastic wire drawing high temperature resistant stainless steel wire by bending and forming to meet the requirements of repeated use at brazing temperatures up to 600°C and to maintain its elasticity.
[0022] The intermediate flexible structure 1 and the two wire drawing bodies 2 are bent into one piece, and its cross-sectional shape is W-shaped. The intermediate flexible structure 1 and the two wire drawing bodies 2 form a W-shaped flexible body, which allows the wire drawing bodies 2 to have elastic deformation and recovery in the tensile state. The included angle between the two wire drawing bodies 2 is 140°. The initial clamping force on the product is determined according to the length of the two wire drawing bodies 2 (based on the distance between the opposite ends of the two wire drawing bodies 2 when laid flat, and a moderate deformation of 10-25mm is applied during the initial clamping). The approximately 140° included angle between the two wire drawing bodies 2 facilitates a large tensile deformation, so that it, together with the intermediate flexible structure 1, can clamp the product and adapt to the thermal expansion and cooling of the product during brazing. During the shrinking process, a moderate clamping force is maintained on the product. Two claws 3 are respectively vertically set at the opposite ends of the two wire drawing bodies 2. The two claws 3 and the two wire drawing bodies 2 are at a 90° angle. The two wire drawing bodies 2 are attached to the upper surface of the middle flexible structure 1. The opposite ends of the two wire drawing bodies 2 are at a 90° angle to the two claws 3, which are used to hook and clamp the two ends of the product core. When clamping the product, the wire drawing bodies 2 are flat against the surface of the product core. In this way, during the product brazing process, the product can always be kept in a moderate clamping state, thereby eliminating defects such as fin collapse and deformation, strip falling off, and misalignment of parts that are easy to occur during product brazing. Moreover, it has the characteristics of simple structure and low manufacturing and maintenance costs.
[0023] It is understandable that the flexible, elastic, high-temperature resistant stainless steel wire used for brazing clamping in this heat exchanger is made by bending and forming to meet the requirements of repeated use at brazing temperatures up to 600℃ while maintaining its elasticity. The two wire-drawing bodies 2 form an angle of approximately 140° to facilitate a large tensile deformation, so that together with the central flexible structure 1, they maintain a moderate clamping force on the product during brazing and during the thermal expansion and contraction of the product. The opposite ends of the two wire-drawing bodies 2 form a 90° angle with the two claws 3 to hook and clamp the two ends of the product core, keeping the wire-drawing bodies 2 flat against the surface of the product core when clamping the product. This ensures that the product is always in a moderate clamping state during the brazing process, thereby eliminating defects such as fin collapse or strip falling off, and misalignment of parts that are prone to occur during product brazing. Moreover, it has the characteristics of simple structure and low manufacturing and maintenance costs.
[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, any aspects not detailed in this utility model are well-known technologies to those skilled in the art.
[0025] The working principle of the above embodiments is as follows:
[0026] The heat exchanger's brazing clamping mechanism is made of flexible, elastic, high-temperature resistant stainless steel wire through bending and forming. This allows it to withstand repeated use at brazing temperatures up to 600℃ while maintaining its elasticity. The central flexible structure 1 and the two drawn wire bodies 2 form a W-shaped flexible structure, enabling the drawn wire bodies 2 to elastically deform and recover under tension. The initial clamping force is determined by the length of the two drawn wire bodies 2 (based on the distance between the opposite ends of the two drawn wire bodies 2 when laid flat, with a suitable deformation of 10-25mm during initial clamping). The two drawn wire bodies 2 form an angle of approximately 140° to facilitate the generation of a relatively... The large tensile deformation allows it, together with the intermediate flexible structure 1, to maintain a moderate clamping force on the product during the product's clamping process and to adapt to the thermal expansion and contraction during brazing. The opposite ends of the two wire-drawing bodies 2 are bent at a 90° angle to the two claws 3, which are used to hook and clamp the two ends of the product core and keep the wire-drawing bodies 2 flat against the surface of the product core when clamping the product. This ensures that the product is always in a moderate clamping state during the product brazing process, thereby eliminating defects such as fin collapse or strip falling off, and misalignment of parts that are prone to occur during product brazing. Moreover, it has the characteristics of simple structure and low manufacturing and maintenance costs.
[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A flexible elastic wire for brazing clamping in a heat exchanger, comprising a core body (4), characterized in that: The core body (4) has claws (3) attached to both the front and rear sides, and a connecting component connecting the two claws (3) is provided on the top of the core body (4). The connecting assembly includes a V-shaped intermediate flexible structure (1) that is attached to the upper surface of the core body (4), and two wire drawing bodies (2) are welded to one end of the intermediate flexible structure (1) facing the two claws (3).
2. The flexible elastic wire for brazing and clamping a heat exchanger according to claim 1, characterized in that: The intermediate flexible structure (1) is bent and integrally formed with the two wire drawing bodies (2), and its cross-sectional shape is W-shaped.
3. The flexible elastic wire for brazing clamping of a heat exchanger according to claim 1, characterized in that: The included angle between the two wire drawing bodies (2) is 140°.
4. The flexible elastic wire for brazing clamping of a heat exchanger according to claim 1, characterized in that: The two claws (3) are respectively vertically set at opposite ends of the two wire drawing bodies (2).
5. The flexible elastic wire for brazing clamping of a heat exchanger according to claim 4, characterized in that: The two claws (3) and the two wire drawing bodies (2) are all at a 90° angle.
6. The flexible elastic wire for brazing clamping of a heat exchanger according to claim 1, characterized in that: Both of the wire drawing bodies (2) are attached to the upper surface of the intermediate flexible structure (1).