Fin cutting mechanism for fin processing mold

Abstract

To provide a fin cutting mechanism for a fin processing die that effectively suppresses defects such as blade jamming, burrs on the cut surface, and poor cutting. [Solution] The fin cutting mechanism for a fin processing mold includes a base to which a lower cutting blade is fixed and an upper cutting blade positioned opposite it. A rotating shaft is provided above the upper cutting blade, and multiple striking blocks with an eccentric wheel structure are attached to the rotating shaft. A striking rod that aligns with the striking block is connected to the upper cutting blade, and a return spring is provided between the upper cutting blade and the base. The spring holds the upper cutting blade in a floating structure above the base, and when the striking block is not in contact with the striking rod, a gap for fin transport is secured between the upper and lower blades. The striking block rotates on the rotating shaft and intermittently strikes the striking rod to cut the fin, separating the rotating shaft from the upper cutting blade. This prevents lateral forces from the rotating shaft from being directly applied to the upper cutting blade, preventing misalignment of the upper cutting blade due to lateral forces.

Description

[Technical Field]

[0001] This utility model relates to a mold used in processing fins, and in particular to a fin cutting mechanism for cutting fins to a predetermined length. [Background technology]

[0002] In the fin manufacturing process, a continuously conveyed strip of fin material must be cut to a predetermined length. A "fin cutting mechanism" is typically used for this purpose. Conventional techniques involve connecting a rotating cam and an upper blade slide plate via a link mechanism, with the upper blade slide plate moving up and down as the cam rotates. Examples include the "Fin Cutting Mechanism for Fin Processing Dies" in Chinese Patent Application No. "202310760196.3," the "Cutting Mechanism for Automated Fin Processing Dies for Air Conditioners" in Chinese Patent Application No. "202223392982.2," and the "Cutting Structure for High-Speed Fin Processing Dies" in Chinese Patent Application No. "202120130498.9." However, these structures apply lateral forces to the upper blade slide plate as the link operates, making the upper and lower blades prone to misalignment. This results in issues such as blade jamming, burrs on the fin cut surface, and poor cutting. Summary of the Invention

[0003] The purpose of this utility model is to provide a new fin cutting mechanism that reduces lateral forces in order to solve the problems of the conventional technology, in which the gap between the upper and lower blades fluctuates due to lateral forces generated when the upper blade holder (upper blade slide plate) is lowered by the link mechanism, resulting in blade jamming, burrs on the cutting surface, and poor cutting.

[0004] The technical means of this utility model are as follows. The fin cutting mechanism for this fin processing mold comprises a base to which a lower cutting blade is fixed and an upper cutting blade arranged opposite it. A rotating shaft is provided above the upper cutting blade, and multiple striking blocks with an eccentric wheel structure are attached to this rotating shaft. A striking rod that mates with the striking blocks is connected to the upper cutting blade, and a return spring is arranged between the upper cutting blade and the base. This spring holds the upper cutting blade in a floating structure above the base, and when the striking block is not in contact with the striking rod, a gap for fin transport is secured between the upper and lower blades. As a means for reducing side force, a rotary bearing is provided at the upper end of the striking rod to cooperate with the striking block, and the rotary bearing is rotatably attached to the striking rod. As a means for ensuring the consistency of the operation of the upper cutting blade, the upper cutting blade is fixed to an upper blade slide plate, and a pushing spring is installed between the upper blade slide plate and the base. The specific structure of the rotating shaft is as follows: A plurality of support seats are provided at intervals on the base, and the rotating shaft is rotatably attached to these support seats. One end of the rotating shaft is connected to a drive source, which drives the rotating shaft. To control the up and down stroke of the upper cutting blade, an oval hole is provided in the upper blade slide plate along the direction of its movement, and a positioning bolt that cooperates with this oval hole is fixedly installed in the base.

[0005] The beneficial effects of the present invention are as follows. With this structure, the striking block strikes the striking rod, driving the upper cutting blade downward and cutting the fin in cooperation with the lower cutting blade. By separating the rotating shaft from the upper cutting blade, it is possible to prevent lateral forces from the rotating shaft from being directly applied to the upper cutting blade, preventing the upper cutting blade from shifting position due to lateral forces. As a result, problems such as blade jamming, burrs on the cut surface, and poor cutting can be effectively prevented. The present utility model will be described in detail below with reference to the accompanying drawings. [Brief explanation of the drawings]

[0006] [Figure 1] FIG. 1 is a front view of the present utility model. [Figure 2] FIG. 2 is a side view of the present utility model. [Figure 3] FIG. 3 is a cross-sectional view of the present utility model. DETAILED DESCRIPTION OF THE INVENTION

[0007] As an embodiment, as shown in FIGS. 1 to 3, the fin cutting mechanism for the fin processing die includes the following components. Pedestal 1 fixed to the lower base of the mold Lower cutting blade 2 fixed to base 1 and an upper cutting blade 3 that cooperates with the lower cutting blade 2 to cut the fin. The upper cutting blade 3 is fixed to an upper blade slide plate 9, which has an oval hole 91 formed in the slide plate 9 along its movement direction. A positioning bolt 101 that cooperates with this oval hole 91 is provided in the base 1, limiting the stroke of the upper cutting blade 3. A spring seat member 12 is fixed to the base 1, and an extrusion spring 7 is installed between this and the upper blade slide plate 9. The reaction force of this spring holds the upper blade slide plate 9 on the base 1 in a floating structure, and when no external force is applied, a gap for fin transport is secured between the upper and lower cutting blades. To cut the fin, multiple support seats 10 are installed at intervals on the base 1, and a rotating shaft 4 is attached to these support seats. A drive source 11 (preferably a servo motor) is connected to one end of the rotating shaft 4. A first synchronous pulley 13 is attached to the output shaft of the drive motor. A second synchronous pulley 14 is attached to the end of the rotating shaft 4, and the two are connected by a synchronous belt (not shown). A striking block 5 with an eccentric wheel structure is mounted on the rotating shaft 4. A striking rod 6 that cooperates with the striking block 5 is connected to the upper cutting blade 3. As the rotating shaft 4 rotates, the striking block 5 strikes the striking rod 6, causing the upper cutting blade slide plate 9 to move downward against the reaction force of the extrusion spring 7. Cutting is performed by the cooperation of the upper cutting blade 3 and the lower cutting blade 2. After cutting is complete, the upper cutting blade slide plate 9 returns to its original position due to the spring force. To reduce wear, a rotary bearing 8 that cooperates with the striking block 5 is provided at the upper end of the striking rod 6, and the rotary bearing 8 is rotatably attached to the striking rod 6 via a bearing connecting pin 15. The striking force of the striking block 5 acts on this rotary bearing 8, applying a downward force and promoting rotation at the same time, thereby reducing lateral forces.

[0008] Although one embodiment of the present utility model has been described above with reference to the drawings, the present utility model is not limited to these configurations. Various non-essential changes and improvements based on the technical idea and configuration of the present utility model, as well as applications of the technical idea and configuration of the present utility model to other uses without any changes, are all within the technical scope of protection of the present utility model.

Claims

1. This fin cutting mechanism for a fin processing mold includes a base (1) to which a lower cutting blade (2) is fixed and an upper cutting blade (3) arranged opposite the base, a rotating shaft (4) is provided above the upper cutting blade (3), multiple impact blocks (5) with an eccentric wheel structure are attached to the rotating shaft (4), a striking rod (6) that cooperates with the impact block (5) is connected to the upper cutting blade (3), a return spring (7) is arranged between the upper cutting blade (3) and the base (1), the spring (7) holds the upper cutting blade (3) in a floating structure on the base (1), and when the impact block (5) is not in contact with the striking rod (6), a gap for fin transport is secured between the upper and lower blades. This fin cutting mechanism for a fin processing mold is characterized in that

2. The fin cutting mechanism for a fin processing die according to claim 1 is characterized in that a rotary bearing (8) that cooperates with the striking block (5) is provided at the upper end of the striking rod (6), and the rotary bearing (8) is rotatably attached to the striking rod (6).

3. The fin cutting mechanism for a fin processing mold according to claim 1 is characterized in that the upper cutting blade (3) is fixed to an upper blade slide plate (9), and an extrusion spring (7) is installed between the upper blade slide plate (9) and the base (1).

4. The fin cutting mechanism for a fin processing mold according to claim 1 is characterized in that a plurality of support seats (10) are provided at intervals on the base (1), the rotating shaft (4) is rotatably attached to these support seats (10), and a drive source (11) for driving the rotating shaft (4) is connected to one end of the rotating shaft (4).

5. The fin cutting mechanism for a fin processing die according to claim 3 is characterized in that the upper blade slide plate (9) is provided with an oval hole (91) along its operating direction, and a positioning bolt (101) that cooperates with this oval hole (91) is fixedly installed on the base (1).

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