A plate-fin heat exchanger head forming device

Abstract

This utility model discloses a plate-fin heat exchanger head forming device, belonging to the field of head pressing and forming technology. The device provided by this utility model is installed on a hydraulic press and includes an upper mold, a lower mold, and a base. The upper mold includes a connecting plate, a connecting rod, and a pressure ball. The connecting plate is fixedly connected to the bottom of the upper end of the hydraulic press by a first fastener. Under the action of the hydraulic press, the upper mold transmits pressure to the plate to be pressed. The top of the connecting rod is vertically fixedly connected to the side of the connecting plate facing away from the upper end of the hydraulic press, and the pressure ball is fixedly set at the bottom of the connecting rod. The lower mold is installed on the base by a second fastener to support the plate to be pressed. The base is fixedly connected to the top of the lower end of the hydraulic press by a third fastener. The upper surface of the lower mold has a groove. The plate to be pressed is placed in the groove, and the pressure ball cooperates with the groove to gradually bend and form the plate. Cost optimization is achieved while meeting production requirements and structural strength.

Description

Technical Field

[0001] This utility model belongs to the field of head pressing and forming technology, specifically relating to a plate-fin heat exchanger head forming device. Background Technology

[0002] Plate-fin heat exchangers are highly efficient heat exchange devices widely used in cryogenic technology, aerospace, chemical industry, refrigeration, and many other fields. They are renowned for their compact structure, high heat exchange capacity, and wide applicability. The end caps are a crucial component of a plate-fin heat exchanger, connecting the various parts of the exchanger and ensuring uniform fluid flow into each heat exchange unit, guiding the fluid in and out of the heat exchanger. The shape of the end caps can be semi-circular, semi-elliptical, or other designs, depending on the size of the heat exchanger and the application requirements.

[0003] Enclosures formed from rolled sheet metal are typically processed using plate rolling machines. The thickness of these enclosures varies widely depending on the channel design pressure, with commonly used sheet metal thicknesses ranging from 6mm to 45mm or even higher. Within this thickness range, the required inner diameter of the enclosure also differs, placing high demands on the capacity of the plate rolling machines. To fully meet the requirements for enclosure rolling, multiple plate rolling machines are needed, resulting in significant costs. Furthermore, the varying number of enclosures within each thickness range can lead to lower utilization rates for some of the rolling machines. Utility Model Content

[0004] The purpose of this invention is to design a tooling that reduces the use of plate rolling machines with different capacity ranges, control the manufacturing cost of end caps, and provide a plate-fin heat exchanger end cap forming device.

[0005] The specific technical solution adopted in this utility model is as follows: This utility model provides a plate-fin heat exchanger head forming device, which is installed on a hydraulic press and includes an upper mold, a lower mold, and a base. The upper mold includes a connecting plate, a connecting rod, and a pressure ball. The connecting plate is fixedly connected to the bottom of the upper end of the hydraulic press by a first fastener. Under the action of the hydraulic press, the upper mold transmits pressure to the plate to be pressed. The top of the connecting rod is vertically fixedly connected to the side of the connecting plate facing away from the upper end of the hydraulic press, and the pressure ball is fixedly set at the bottom of the connecting rod. The lower mold is mounted on the base by a second fastener to support the plate to be pressed. The base and the top of the lower end of the hydraulic press are fixedly connected by a third fastener. The upper surface of the lower mold is provided with a groove. The plate to be pressed is placed on the groove, and the plate to be pressed is gradually bent and shaped by the cooperation of the pressure ball and the groove.

[0006] Preferably, the upper mold includes multiple sets of connecting rods and pressure balls.

[0007] Preferably, the connecting rods are evenly spaced apart, and each connecting rod is vertically fixed to the connecting plate.

[0008] Preferably, the upper surface of the lower mold is provided with one or more grooves with different inner diameters.

[0009] Preferably, the curvature of the groove is the same as the curvature of the inner diameter of the end cap to be press-formed.

[0010] Preferably, the first fastener is a bolt.

[0011] Preferably, the second fastener is a bolt.

[0012] Preferably, the third fastener is a bolt.

[0013] Compared with the prior art, this utility model has the following advantages: This invention replaces the traditional plate rolling method with a hydraulic press for producing plate-fin heat exchanger heads. Combined with a lower die featuring grooves of various sizes, it optimizes costs while meeting production requirements and structural strength. This optimization effectively avoids the need for multiple machines due to the large range of thickness and inner diameter of the head plates, solving the problem of low utilization of head pressing equipment. Switching to hydraulic pressing effectively reduces reliance on multiple types of plate rolling machines, and process integration improves equipment versatility and production scheduling flexibility, thereby reducing equipment investment costs and playing a positive role in manufacturing cost control. Attached Figure Description

[0014] Figure 1 This is an overall schematic diagram of the plate-fin heat exchanger head forming device provided in this embodiment. Figure 2 This is a front view of the upper mold provided in this embodiment; Figure 3 This is a side view of the upper mold provided in this embodiment; Figure 4 for Figure 1 Enlarged perspective view of section A; Figure 5 This is a schematic diagram of the lower mold structure provided in this embodiment; Figure 6 This is a schematic diagram showing the connection between the lower mold and the hydraulic press provided in this embodiment; Upper mold 1, connecting plate 1-1, connecting rod 1-2, pressure ball 1-3, lower mold 2, first groove 2-1, second groove 2-2, third groove 2-3, base 3, plate to be pressed 4, hydraulic press 5, first fastener 6, second fastener 7, third fastener 8. Detailed Implementation

[0015] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below. Technical features in various embodiments of this utility model can be combined appropriately without conflict.

[0016] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection" and "installation" should be interpreted broadly. For example, they can refer to a fixed connection or installation, a detachable connection or installation, or an integral connection or installation. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Terms such as "having," "comprising," and "including" as used herein do not exclude the presence or addition of one or more other elements or combinations thereof, and therefore should not be construed as limiting this utility model.

[0017] like Figure 1 As shown, in a preferred embodiment of this utility model, this embodiment provides a plate-fin heat exchanger head forming device. This head forming device is mounted on a hydraulic press 5 and is used to press a sheet material 4 (such as aluminum alloy) into a head with a specific curvature. The plate-fin heat exchanger head forming device provided in this embodiment includes an upper mold 1, a lower mold 2, and a base 3. (See diagram below.) Figure 2 and Figure 3 As shown, the upper mold 1 is composed of a connecting plate 1-1, a connecting rod 1-2, and a pressure ball 1-3. In this embodiment, as... Figure 4As shown, the connecting plate 1-1 is a square plate, which is fixedly connected to the bottom of the upper end of the hydraulic press 5 by the first fastener 6. When the hydraulic press 5 presses down, the pressure is transmitted to the plate 4 to be pressed through the upper mold 1. In this embodiment, the first fastener 6 is a bolt, and there are several of them. This ensures a tight connection between the connecting plate 1-1 and the hydraulic press 5, while also facilitating the replacement of connecting plates 1-1 of other sizes or shapes. When the hydraulic press 5 is used for other purposes, the upper mold 1 can also be directly removed, improving the utilization rate of the hydraulic press 5. In other embodiments, other suitable methods can also be used for fixing. One or more sets of connecting rods 1-2 and pressure balls 1-3 can be set on the connecting plate 1-1. In this embodiment, multiple sets of connecting rods 1-2 and pressure balls 1-3 are set. These connecting rods 1-2 are evenly spaced. The top of each connecting rod 1-2 is vertically fixedly connected to the side of the connecting plate 1-1 facing away from the hydraulic press 5, and the bottom of each connecting rod 1-2 is fixedly connected to the pressure ball 1-3. Through this structural design, the concentrated pressure applied by the hydraulic press is transformed into multiple uniform and vertical force points, thereby realizing the progressive, multi-pass bending and forming of the platen 4 to be pressed from thick-walled aluminum alloy materials, preventing the platen 4 from becoming too thin or cracking in some areas.

[0018] like Figure 1 and Figure 5 As shown, in a preferred embodiment of this utility model, the lower mold 2 is mounted on the base 3 to support the plate 4 to be pressed. To adapt to the production needs of end caps of different specifications, the upper surface of the lower mold 2 is provided with one or more grooves with different inner diameters. In this embodiment, the upper surface of the lower mold 2 is provided with a first groove 2-1, a second groove 2-2, and a third groove 2-3. The inner diameters of the first groove 2-1, the second groove 2-2, and the third groove 2-3 are different, together forming a standardized forming module covering commonly used specifications. During the production process, the operator can select a groove with a suitable inner diameter according to the target inner diameter curvature of the end cap to be pressed, ensuring that the curvature of the selected groove is the same as the inner diameter curvature of the end cap to be pressed, and then place the plate 4 to be pressed on the selected groove for pressing. In this configuration, when the upper end of the hydraulic press 5 drives the upper mold 1 to press down, the pressure balls 1-3 force the plate 4 to be pressed into the groove of the lower mold 2, causing plastic deformation. The inner diameter curvature of the plate 4 is precisely pressed into the target curvature consistent with the selected groove. This design achieves rapid and precise pressing and forming of various specifications of end caps with a single lower mold 2, enhancing the process flexibility of the equipment, while avoiding production interruptions and cost increases caused by mold changes.

[0019] like Figure 1 and Figure 6As shown, the lower mold 2 is disposed on the upper surface of the base 3 and is fixed to the base 3 by the second fastener 7. The base 3 is fixedly connected to the top of the lower end of the hydraulic press 5 by the third fastener 8. In this embodiment, both the second fastener 7 and the third fastener 8 are bolts, so that the lower mold 2 and the base 3, and the base 3 and the hydraulic press 5 are detachably connected. When the inner diameter curvature of the groove on one of the lower molds 2 does not meet the production requirements, this design facilitates the replacement of other lower molds 2 with different grooves according to the production requirements of different end cap specifications, thereby meeting the production requirements and improving the equipment utilization rate of the hydraulic press 5.

[0020] In this embodiment, the head forming device operates by using a hydraulic press 5 to drive the upper mold 1 downwards. The pressure is transmitted to the pressure ball 1-3 through the connecting plate 1-1 and the connecting rod 1-2. The pressure ball 1-3 contacts the plate 4 to be pressed and presses it into the corresponding groove of the lower mold 2. Through repeated, progressive pressing by the hydraulic press 5, the plate 4 gradually bends under the combined action of the pressure ball 1-3 and the groove, ultimately forming a head with the required inner diameter curvature. In this embodiment, the secure fixing of the upper mold 1 to the hydraulic press 5 is the core guarantee for the efficient and precise processing of the entire head forming device. This connection ensures that the pressure of the hydraulic press 5 can be transmitted vertically and without loss to the plate 4 to be pressed, thereby effectively preventing the eccentric torque generated during the head pressing process and avoiding head twisting or uneven wall thickness. Meanwhile, the upper mold 1 is fixedly connected to the hydraulic press 5, the lower mold 2 to the base 3, and the base 3 to the hydraulic press 5 with bolts, eliminating the safety hazards of displacement or detachment of the upper mold 1, lower mold 2, or base 3 during the pressing of the end cap. At the same time, it enables the rapid replacement of upper mold 1 and lower mold 2 of different specifications. Ultimately, while ensuring operational safety, it improves the flexibility of production, the equipment utilization rate of the hydraulic press 5, and the product forming accuracy.

[0021] The embodiments described above are merely preferred solutions of this utility model, and are not intended to limit the scope of this utility model. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this utility model. Therefore, all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of this utility model.

Claims

1. A plate-fin heat exchanger head forming device, the device being installed on a hydraulic press (5), characterized in that, The device includes an upper mold (1), a lower mold (2), and a base (3). The upper mold (1) includes a connecting plate (1-1), a connecting rod (1-2), and a pressure ball (1-3). The connecting plate (1-1) is fixedly connected to the bottom of the upper end of the hydraulic press (5) by a first fastener (6). The upper mold (1) transmits pressure to the plate to be pressed (4) under the action of the hydraulic press (5). The top of the connecting rod (1-2) is vertically fixedly connected to the side of the connecting plate (1-1) facing away from the upper end of the hydraulic press (5). The pressure ball (1-3) is fixedly set at the bottom of the connecting rod (1-2). The lower mold (2) is installed on the base (3) by the second fastener (7) to support the plate to be pressed (4). The base (3) and the top of the lower end of the hydraulic press (5) are fixedly connected by the third fastener (8). The upper surface of the lower mold (2) is provided with a groove. The plate to be pressed (4) is placed on the groove. The plate to be pressed (4) is gradually bent and shaped by the cooperation of the pressure ball (1-3) with the groove.

2. The plate-fin heat exchanger head forming device according to claim 1, characterized in that, The upper mold (1) includes multiple sets of connecting rods (1-2) and pressure balls (1-3).

3. The plate-fin heat exchanger head forming device according to claim 2, characterized in that, Several connecting rods (1-2) are evenly spaced apart, and each connecting rod (1-2) is vertically fixed to the connecting plate (1-1).

4. The plate-fin heat exchanger head forming device according to claim 1, characterized in that, The upper surface of the lower mold (2) is provided with one or more grooves with different inner diameters.

5. The plate-fin heat exchanger head forming device according to claim 1, characterized in that, The curvature of the groove is the same as the curvature of the inner diameter of the end cap to be pressed.

6. The plate-fin heat exchanger head forming device according to claim 1, characterized in that, The first fastener (6) is a bolt.

7. The plate-fin heat exchanger head forming device according to claim 1, characterized in that, The second fastener (7) is a bolt.

8. The plate-fin heat exchanger head forming device according to claim 1, characterized in that, The third fastener (8) is a bolt.

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