CN213645488U

CN213645488U - Fin hole flanging die

Info

Publication number: CN213645488U
Application number: CN202022080396.9U
Authority: CN
Inventors: 储杰; 尤永贵; 金铁军
Original assignee: Huangshan Sanjia Yihua Precision Machine Co ltd
Current assignee: Huangshan Sanjia Yihua Precision Machine Co ltd
Priority date: 2020-09-21
Filing date: 2020-09-21
Publication date: 2021-07-09
Anticipated expiration: 2030-09-21

Abstract

The utility model discloses a fin hole flanging die, which comprises an upper sub-die plate and a lower sub-die plate, wherein the upper sub-die plate is sequentially provided with an upper die base plate and an upper die fixing plate, and the lower sub-die plate is superposed with a lower die base plate and a lower die fixing plate; the material belt feeding device is characterized in that a group of flanging male dies are arranged on the upper die fixing plate side by side along the material belt advancing direction, each flanging male die comprises a fixed end, a long shaft section and a flanging convex cylinder located at the end of the long shaft section, the end of each flanging convex cylinder is of a cambered surface structure, the flanging convex cylinders and the long shaft section are coaxially arranged, the diameter of each flanging convex cylinder is smaller than that of the long shaft section, a transition R angle is arranged between each flanging convex cylinder and the long shaft section, the radius of the transition R angle on each flanging male die is gradually reduced along the material belt advancing direction, and the radius of the transition R angle of the last flanging male die in the. The utility model discloses can reduce fin hole turn-ups radian, increase the area of contact of fin hole and copper pipe to improve the tight power of expanding of fin and copper pipe, but wide application in fin spot facing work field.

Description

Fin hole flanging die

Technical Field

The utility model belongs to the technical field of air conditioner fin processing technique and specifically relates to a fin hole flanging mould is related to.

Background

The heat exchanger comprises fins arranged in an overlapping mode and a group of copper pipes inserted in the fins. The fin holes are distributed in the fins and used for mounting copper pipes, and then the copper pipes and the fin holes are expanded and fixed through the expansion pipes. In the prior art, a boss is formed by extending a fin hole, then the fin hole is formed by punching the fin hole through a punching die, in order to prevent the fin from cracking during extending and punching, outward turned flanges 14 are arranged at the positions of orifices of the fin hole, as shown in fig. 1, the larger the angle of the flange 14 is, the smaller the contact area between the fin hole 15 and a copper pipe 16 is, and the smaller the expansion force is. Therefore, customers propose a flanging structure which requires to reduce or cancel the fin holes so as to improve the expansion force of the fins and the copper pipe. Therefore, improvements in fin punching dies are needed to reduce the curvature of the turnup.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a fin hole flanging mould, it is big to solve current fin hole drill way position radian, with the little problem of the tight power of expander roll.

The utility model provides a technical scheme that its technical problem adopted is: a fin hole flanging die comprises an upper sub die plate and a lower sub die plate, wherein an upper die base plate and an upper die fixing plate are sequentially arranged on the upper sub die plate, and a lower die base plate and a lower die fixing plate are arranged on the lower sub die plate in an overlapped mode; the material belt feeding device is characterized in that a group of flanging male dies are arranged on the upper die fixing plate side by side along the material belt advancing direction, each flanging male die comprises a fixed end, a long shaft section and a flanging convex cylinder located at the end of the long shaft section, the end of each flanging convex cylinder is of a cambered surface structure, the flanging convex cylinders and the long shaft section are coaxially arranged, the diameter of each flanging convex cylinder is smaller than that of the long shaft section, a transition R angle is arranged between each flanging convex cylinder and the long shaft section, the radius of the transition R angle on each flanging male die is gradually reduced along the material belt advancing direction, and the radius of the transition R angle of the last flanging male die in the.

Furthermore, at least two flanging male dies are arranged, wherein the transition R angle of one flanging male die is of a smooth cambered surface structure, and the transition R angle of the other flanging male die is of a right-angle structure.

In order to facilitate quick separation of the punched material belt from the lower die, a lower discharging plate is arranged on the lower die fixing plate, a female die hole matched with the flanging convex column on the flanging convex die is formed in the lower discharging plate, an ejector pin is arranged below the female die hole, and an ejector spring is arranged below the ejector pin.

In order to prevent the material belt from moving upwards along with the flanging male die, an upper stripper plate is arranged below the upper die fixing plate, a limiting block for limiting the stroke of the upper stripper plate is arranged on the upper die fixing plate, and a pressing spring is arranged between the flanging male die and the upper sub die plate.

The utility model has the advantages that: the utility model discloses a set up the turn-ups terrace die at a set of gradual change transition R angle on last submodule, carry out a lot of hole flanging to same fin hole, and then make the turn-ups angle in fin hole diminish gradually, finally make fin hole and fin plane be close and be the right angle state to increase the area of contact in fin hole and copper pipe, improve the tight power of expanding of fin and copper pipe. Meanwhile, the transition R angle gradually changed can avoid the problems of direct punching of right angles and cracking of hole flanging parts. The upper discharging plate, the lower discharging plate and the matching structure of the upper discharging plate and the lower discharging plate can enable the fins to be rapidly separated from the upper die and the lower die after hole flanging is completed, and the material belt is enabled to be normally pushed forwards.

The present invention will be described in more detail with reference to the accompanying drawings and examples.

Drawings

Fig. 1 is the structural schematic diagram of the fit between the hole flanging and the copper tube of the middle fin.

Fig. 2 is a schematic structural diagram of the mold of the present invention in a closed state.

Fig. 3 is the structural schematic diagram of the middle flanging male die of the utility model.

Detailed Description

An embodiment is shown in fig. 2 and 3, and is a fin hole flanging die for machining a fin hole shown in fig. 1, and the die includes an upper sub-die plate 1 and a lower sub-die plate 2, wherein an upper die pad plate 3 and an upper die fixing plate 4 are sequentially and fixedly arranged on the upper sub-die plate 1, an upper stripper plate 11 is arranged below the upper die fixing plate 4, a limit block 12 for limiting the stroke of the upper stripper plate 11 is arranged on the upper die fixing plate 4, the limit block 12 is of a U-shaped structure, two ends of the limit block respectively act on the upper end surface of the upper die fixing plate 4 and the lower end surface of the upper stripper plate 11, the middle of the limit block is fixed on the upper die fixing plate 4 through bolts, and when the upper stripper plate 11 moves downward for a certain distance, the limit block 12 blocks the upper stripper plate 11 to prevent the upper.

A group of flanging male dies 7 are arranged on the upper die fixing plate 4 side by side along the advancing direction of the fin material belt, and a pressing spring 13 is arranged between the flanging male dies 7 and the upper sub die plate 1. As shown in fig. 3, the flanging male die 7 includes a fixed end 701, a long shaft section 702, and a flanging convex pillar 703 located at an end of the long shaft section 702, an end of the flanging convex pillar 703 is of an arc structure, the flanging convex pillar 703 and the long shaft section 702 are coaxially disposed, a diameter of the flanging convex pillar 703 is smaller than that of the long shaft section 702, a transition R angle 704 is disposed between the flanging convex pillar 703 and the long shaft section 702, a radius of the transition R angle 704 on the flanging male die 7 is gradually reduced along a forward direction of the strip, and a radius of the transition R angle 704 of the last flanging male die 7 along the forward direction of the strip is zero, so that a flanging 14 at an orifice position of a fin hole is gradually reduced, so as to increase a contact area between the fin hole 15 and a copper pipe 16 and increase an expansion force of the fin and the copper. Further, at least two flanging male dies 7 are arranged, wherein a transition R corner 704 of one flanging male die 7 is of a smooth cambered surface structure, and a transition R corner 704 of the other flanging male die 7 is of a right-angle structure, that is, the radius of the transition R corner 704 is zero.

And a lower die base plate 5 and a lower die fixing plate 6 are arranged on the lower sub-die plate 2 in an overlapped mode. A lower discharging plate 8 is arranged on the lower die fixing plate 6, a female die hole 801 matched with the flanging convex column 703 on the punching male die 7 is formed in the lower discharging plate 8, an ejector pin 9 is arranged below the female die hole 801, and an ejector spring 10 is arranged below the ejector pin 9, so that discharging after hole flanging is facilitated.

The invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above-described manner. Various insubstantial improvements are made by adopting the method conception and the technical proposal of the utility model; or without improvement, the above conception and technical solution of the present invention can be directly applied to other occasions, all within the protection scope of the present invention.

Claims

1. A fin hole flanging die comprises an upper sub-die plate (1) and a lower sub-die plate (2), wherein an upper die base plate (3) and an upper die fixing plate (4) are sequentially arranged on the upper sub-die plate (1), and a lower die base plate (5) and a lower die fixing plate (6) are arranged on the lower sub-die plate (2) in an overlapped mode; the method is characterized in that: the material belt feeding device is characterized in that a group of flanging male dies (7) are arranged on the upper die fixing plate (4) side by side along the material belt advancing direction, each flanging male die (7) comprises a fixed end (701), a long shaft section (702) and a flanging convex cylinder (703) located at the end of the long shaft section (702), the end of each flanging convex cylinder (703) is of an arc surface structure, the flanging convex cylinders (703) and the long shaft section (702) are coaxially arranged, the diameter of each flanging convex cylinder (703) is smaller than that of the long shaft section (702), a transition R angle (704) is arranged between each flanging convex cylinder (703) and the long shaft section (702), the radius of the transition R angle (704) on each flanging male die (7) is gradually reduced along the material belt advancing direction, and the radius of the transition R angle (704) of the last flanging male die (7) in.

2. The fin-flanging die of claim 1, wherein: the flanging male dies (7) are at least provided with two flanging male dies, wherein a transition R angle (704) of one flanging male die (7) is of a smooth cambered surface structure, and a transition R angle (704) of the other flanging male die (7) is of a right-angle structure.

3. The fin-flanging die of claim 1, wherein: the lower die fixing plate (6) is provided with a lower discharging plate (8), a female die hole (801) matched with the flanging convex column (703) on the flanging convex die (7) is formed in the lower discharging plate (8), an ejector pin (9) is arranged below the female die hole (801), and an ejection spring (10) is arranged below the ejector pin (9).

4. The fin-flanging die of claim 1, wherein: an upper stripper plate (11) is arranged below the upper die fixing plate (4), a limiting block (12) for limiting the stroke of the upper stripper plate (11) is arranged on the upper die fixing plate (4), and a pressing spring (13) is arranged between the flanging male die (7) and the upper sub-die plate (1).