A double flanging structure

Abstract

The utility model relates to the field of fin production technology, concretely relates to a secondary flanging structure, including the gasket group of installation in the lower mould plate top surface, the gasket group top surface is equipped with the female die cover fixed plate, the female die cover fixed plate is equipped with the female die cover in the installation, the female die cover top is equipped with the flanging male die, the flanging male die is vertically movably installed in the flanging male die fixed plate, the flanging male die fixed plate bottom is equipped with the third unloading plate, the upper mould plate is equipped with the second height adjusting mechanism that controls the flanging male die up and down movement.

Description

Technical Field

[0001] This utility model relates to the field of fin manufacturing technology, specifically to a secondary flanging structure. Background Technology

[0002] Because stainless steel is hard and has a high springback coefficient, the traditional punching and one-time flanging forming structure results in significant clamping force between the material and the punching die during the first flanging forming. This causes plastic deformation of the forming end of the punching die, resulting in chipping when the punch enters the die, leading to cracks in the fin opening and subsequent secondary flanging cracking. After the product expands, copper leakage from the fins occurs, resulting in defective products and scrap. The long-term deformation of the forming end of the punching die also accelerates the wear of the punch and die. Furthermore, the high springback coefficient of stainless steel means that the clearance between the punching and flanging die sleeve and the forming die on one side is greater than the material thickness (because the punching die is hollow, the forming clearance is smaller than the material thickness, making the punching die easily damaged by pressure). This prevents material hardening during the first flanging of the fin opening. When the fin is unloaded and detached from the punching die, the fin diameter shrinks and springs back, making the actual diameter of the fin opening smaller than the theoretical design diameter, resulting in difficulty in pipe insertion. Utility Model Content

[0003] The purpose of this invention is to provide a secondary flanging structure to solve the above problems. By setting an independent flanging mechanism, the wear of the punching and flanging dies can be reduced.

[0004] To achieve the above objectives, this utility model provides the following solution: A secondary flanging structure includes a pad assembly installed on the top surface of a lower template. A die sleeve fixing plate is installed on the top surface of the pad assembly. A die sleeve is installed inside the die sleeve fixing plate. A flanging punch is correspondingly provided above the die sleeve. The flanging punch is vertically and movably installed inside the flanging punch fixing plate. A third unloading plate is installed on the bottom surface of the flanging punch fixing plate. A second height adjustment mechanism for controlling the up and down movement of the flanging punch is provided inside the upper template.

[0005] Preferably, the top surface of the flanging punch fixing plate is provided with a wedge fixing plate, the wedge fixing plate is fixedly connected to the bottom surface of the upper template, and the flanging punch passes through the wedge fixing plate, the flanging punch fixing plate, and the third unloading plate.

[0006] Preferably, the pad assembly includes a first pad and a second pad, which are stacked sequentially from top to bottom and fixedly connected to the lower template.

[0007] Preferably, the upper template is provided with a fourth spring, and the bottom surface of the fourth spring is fixedly contacted with a second unloading push rod, which passes through the inclined wedge fixing plate, the flange punch fixing plate, and the third unloading plate.

[0008] Preferably, the second height adjustment mechanism includes a second wedge, the flanging punch is mounted on the second wedge, and the second wedge is driven by a driving component.

[0009] Preferably, the second inclined wedge includes a second upper inclined wedge that is horizontally slidably disposed within the upper template, a second lower inclined wedge that is slidably disposed on the inclined surface of the second upper inclined wedge, and the second upper inclined wedge is connected to the driving component for transmission.

[0010] Preferably, the driving component includes a second wedge, a second adjusting screw threadedly connected to the second upper wedge, the second adjusting screw shaft being connected to the output shaft of a second digital display lead screw motor, and the second digital display lead screw motor being mounted on the upper template.

[0011] Preferably, the working end side of the flanging punch is provided with several unloading process clearance grooves.

[0012] This utility model has the following technical effects: This invention uses a two-step process: first, punching is performed, then straightening is performed, and then flanging is done. This separates the two processes and allows for independent flanging, which greatly reduces the wear and tear on the punch and die during the flanging process. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Fig. 1 This is a schematic diagram of the main structure of this utility model; Fig. 2 This is a side view of the structure of this utility model; Fig. 3 This is a schematic diagram of the flange punch structure of this utility model. Detailed Implementation

[0015] 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.

[0016] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] Reference Figs. 1-2 As shown, this embodiment provides a secondary flanging structure, including a pad assembly installed on the top surface of the lower template 8, a die sleeve fixing plate 30 installed on the top surface of the pad assembly, a die sleeve 31 installed inside the die sleeve fixing plate 30, a flanging punch 28 correspondingly provided above the die sleeve 31, the flanging punch 28 being vertically and movably installed inside the flanging punch fixing plate 29, a third unloading plate 21.1 installed on the bottom surface of the flanging punch fixing plate 29, and a second height adjustment mechanism for controlling the up and down movement of the flanging punch 28 provided inside the upper template 1.

[0018] To further optimize the design, several unloading process clearance grooves 28.1 are provided on the working end side of the flanging punch 28. The unloading process clearance grooves 28.1 can ensure that there is a certain amount of clearance space for the shrinkage of the hole after flanging, so that the punch can be demolded more easily.

[0019] The scheme is further optimized. The top surface of the flange punch fixing plate 29 is provided with a wedge fixing plate 35. The wedge fixing plate 35 is fixedly connected to the bottom surface of the upper template 1. The flange punch 28 passes through the wedge fixing plate 35, the flange punch fixing plate 29, and the third unloading plate 21.1.

[0020] The scheme is further optimized. The pad assembly includes a first pad 32 and a second pad 32.1. The first pad 32 and the second pad 32.1 are stacked from top to bottom and fixedly connected to the lower template 8.

[0021] The scheme is further optimized. A fourth spring 15.2 is provided inside the upper template 1. The bottom surface of the fourth spring 15.2 is fixedly contacted with a second unloading ejector rod 25.1. The second unloading ejector rod 25.1 passes through the inclined wedge fixing plate 35, the flange punch fixing plate 29, and is fixedly connected to the third unloading plate 21.1.

[0022] In a further optimized design, the second height adjustment mechanism includes a second inclined wedge 42, a flanging punch 28 mounted on the second inclined wedge 42, and a drive component connected to the second inclined wedge 42.

[0023] Further optimizing the design, the second inclined wedge 42 includes several second upper inclined wedges 33 horizontally sliding within the upper template 1. Second lower inclined wedges 34 are slidably fitted onto the inclined surfaces of the second upper inclined wedges 33. Adjacent second upper inclined wedges 33 are connected by hooks, and adjacent second lower inclined wedges 34 are interlocked by steps. The second upper inclined wedges 33 are connected to the driving component. This arrangement ensures longitudinal force interaction among the multiple second lower inclined wedges 34, guaranteeing their synchronous rising and falling. The hooks connecting adjacent second upper inclined wedges 33 ensure synchronous horizontal movement among the multiple first lower inclined wedges 14.

[0024] The scheme is further optimized. The driving component includes a second adjusting screw 18.1 that is threadedly connected to the second upper inclined wedge 33. The second adjusting screw 18.1 is shaft-connected to the output shaft of the second digital display lead screw motor 17.1, which is mounted on the upper template 1.

[0025] By controlling the rotation of the second digital display lead screw motor 17.1, the second adjusting screw 18.1 can be driven to control the horizontal movement of the second upper inclined wedge 33, thereby enabling the second lower inclined wedge 34 to drive the flanging punch 28 to achieve different height adjustments. This can adapt to the drawing height of the drawing process and achieve adjustments to the flanging amount at different heights, ensuring the quality of the finished hole in the fin production.

[0026] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A secondary flanging structure, characterized in that, The system includes a pad assembly installed on the top surface of the lower template (8), a die sleeve fixing plate (30) installed on the top surface of the pad assembly, a die sleeve (31) installed inside the die sleeve fixing plate (30), a flanging punch (28) correspondingly provided above the die sleeve (31), the flanging punch (28) being vertically and movably installed inside the flanging punch fixing plate (29), a third unloading plate (21.1) installed on the bottom surface of the flanging punch fixing plate (29), and a second height adjustment mechanism for controlling the up and down movement of the flanging punch (28) provided inside the upper template (1).

2. A double flanging structure according to claim 1, characterized in that The top surface of the flange punch fixing plate (29) is provided with a wedge fixing plate (35), the wedge fixing plate (35) is fixedly connected to the bottom surface of the upper template (1), and the flange punch (28) passes through the wedge fixing plate (35), the flange punch fixing plate (29), and the third unloading plate (21.1).

3. A double flanging structure according to claim 2, wherein The pad assembly includes a first pad (32) and a second pad (32.1), which are stacked from top to bottom and fixedly connected to the lower template (8).

4. A double flanging structure according to claim 3, wherein The upper template (1) is provided with a fourth spring (15.2), and the bottom surface of the fourth spring (15.2) is fixedly contacted with a second unloading ejector rod (25.1). The second unloading ejector rod (25.1) passes through the inclined wedge fixing plate (35), the flange punch fixing plate (29), and the third unloading plate (21.1).

5. A double flanging arrangement according to claim 4, wherein The second height adjustment mechanism includes a second wedge (42), the flange punch (28) is mounted on the second wedge (42), and the second wedge (42) is connected to a drive component.

6. A double flanging structure according to claim 5, wherein The second wedge (42) includes a second upper wedge (33) that is horizontally slidably disposed in the upper template (1), and a second lower wedge (34) that is slidably disposed on the inclined surface of the second upper wedge (33). The second upper wedge (33) is connected to the driving component for transmission.

7. A double flanging structure according to claim 6, wherein The driving component includes a second adjusting screw (18.1) threadedly connected to the second upper inclined wedge (33). The second adjusting screw (18.1) is axially connected to the output shaft of a second digital display lead screw motor (17.1), which is mounted on the upper template (1).

8. A double flange structure according to claim 1, wherein The working end side of the flange punch (28) is provided with several unloading process clearance grooves (28.1).

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