JPH07106502B2 - Fin manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Use) A fin manufacturing method according to the present invention is applied to a radiator, a heater core, a corrugated fin incorporated in a core part of a heat exchanger such as an evaporator, or a heat transfer tube inside. It is used when making inner fins to be used by inserting it, so that various fins with different widths and plate thicknesses can be manufactured without making troublesome setup changes.

(Prior Art) For example, as a heat exchanger used as a radiator or a heater core, a corrugated fin type heat exchanger using a large number of corrugated fins in the core part is known from Japanese Utility Model Publication No. 59-65286. ing. This corrugated fin type heat exchanger has a large number of flat tubes 1, as shown in FIG.
1 and a large number of corrugated fins 2 and 2 in which a bent metal plate is formed in a zigzag manner and curved portions and flat portions are alternately continuous, and the curved portions of the corrugated fins 2 and 2 are flat tubes 1,
An upper tank 6 and an outlet pipe each having an inlet pipe 5 via a seat plate 4 at both upper and lower (or left and right) end portions of a core portion 3 which is alternately stacked in a state of being in contact with a flat side surface of And a lower tank 8 having

For example, when heat is dissipated from the cooling water by such a corrugated fin type heat exchanger, when the cooling water whose temperature has risen due to the heat of the engine is fed from the inlet pipe 5, the cooling water flows from the upper tank 6 to the lower tank 8. Many flat tubes 1, 1 towards
While flowing down the inside, heat is exchanged between a large number of corrugated fins 2 forming the core part 3 and the air flowing in the front-back direction of the drawing to lower the temperature, and then it is sent out from the outlet pipe 7. Be done.

A method for manufacturing such a corrugated fin is disclosed in JP-A-61
As disclosed in Japanese Laid-Open Patent Publication No. -20627, etc.
A coil 10 in which a long strip-shaped metal plate 9 is wound as shown in the figure.
Is set on the uncoiler 11 of the manufacturing apparatus as shown in FIG. 9, and the strip-shaped metal plate 9 unwound from the coil 10 is meshed with each other through the guide rollers 12, 13 and the tension roller 14 in a gear shape. The corrugated fins 2 are fed between the pair of forming rollers 15 and 15 and are formed in a zigzag shape to match the outer peripheral shape of the forming rollers 15 and 15.

(Problems to be Solved by the Invention) However, in the conventional method of manufacturing a corrugated fin as described above, the following inconvenience occurs.

That is, the thickness and width of the strip-shaped metal plate 9 forming the corrugated fins are often different depending on the type of heat exchanger to be manufactured, but in the case of the conventional corrugated fin manufacturing method, different types of strip-shaped metal plates are used. When making the corrugated fin 2 used, the coil 10 set in the uncoiler 11 must be replaced with the coil 10 around which another strip-shaped metal plate 9 is wound.

In this way, the work of replacing the coil 10 set in the uncoiler 11 is troublesome, and particularly when the corrugated fins are used for small-lot production of a wide variety of products, this is a cause of poor production efficiency.

The inner fins, which are inserted inside the heat transfer tubes to disturb the flow of the liquid flowing in the heat transfer tubes and promote heat exchange between the liquid and the heat transfer tubes, also have the same length as the corrugated fins. Although it is manufactured using a strip-shaped metal plate, it has the same inconvenience as in the case of corrugated fins in the case of production.

The fin manufacturing method of the present invention eliminates the inconveniences described above.

(Means for Solving the Problem) The fin manufacturing method of the present invention is manufactured by shaving a strip-shaped metal plate forming the fin from a short cylindrical base material, and this strip-shaped metal plate is different from the conventional manufacturing method. The feature is that the fins are formed in the same manner.

That is, as shown in FIGS. 1 and 2, a short cylindrical base material 16 made of a metal material that constitutes a fin such as aluminum or copper is used as the base material.
The base material 16 is rotated about a shaft 17 penetrating the center of the base material 16 and a base material 16 is provided by a cutting tool 18 arranged near the outer peripheral surface of the base material 16.
The outer peripheral surface of is cut to a constant thickness to form a long thin metal strip 9.

The belt-shaped metal plate 9 manufactured in this manner is used for the guide roller 1
A pair of molding rollers 15 and 15 meshing with each other via the rollers 2 and 13 and the tension rollers 14 and 14 (since it is completely the same as the conventional case shown in FIG. 9, it is omitted in FIGS. (In case of corrugated fins) or by forming protrusions for disturbance (in case of inner fins) to form fins.

The strip-shaped metal plate 9 scraped off from the short cylindrical base material 16 is
Since it will be rolled up as it is, straightening rollers 19, 19 are provided between the cutting tool 18 and the guide roller 12, and the straightening metal plates 9 immediately after being scraped off are strongly sandwiched by the straightening rollers 19, 19. The band-shaped metal plate 9 is not curved.

Further, the position where the strip-shaped metal plate 9 is scraped from one base material 16 is
The tool is not limited to one as shown in FIG. 1, but as shown in FIGS. 3 to 4, the cutting tools 18a and 18b are provided at two or more locations which are offset in the width direction and the vertical direction of the base material 16. The scraping work may be performed by. Of the two cutting tools 18a and 18b, the cutting tool 18a provided on the upper side has a rake angle α as shown in FIG. 5, and the cutting tool 18b provided on the lower side has a land angle β.

In this case, both cutting tools 18a and 18b are simultaneously scraped off to form different molding rollers 15 and 15 (9th
The strip-shaped metal plate 9 may be supplied to the drawing), but if one bite 18a starts scraping to the core of the base material 16 immediately after the other bite 18b starts scraping work, it will take a long time. It is possible to continuously supply the strip-shaped metal plate.

(Effect of the Invention) Since the fin manufacturing method of the present invention is configured as described above, the width and thickness of the strip-shaped metal plate to be supplied can be easily changed by changing the width and feed amount of the cutting tool. This makes it possible to simplify the setup work when manufacturing different types of fins, and plays a large role in reducing the manufacturing cost in the case of high-mix low-volume production.

[Brief description of drawings]

FIG. 1 is a schematic side view showing a manufacturing apparatus for carrying out the fin manufacturing method of the present invention, FIG. 2 is a plan view of the same, and FIG. 3 is a schematic side view showing a state in which two cutting tools are used. 4 is the same plan view, FIGS. 5-6 are side views showing the cutting edges of two types of cutting tools,
FIG. 7 is a front view showing an example of a heat exchanger using corrugated fins, FIG. 8 is a perspective view of a coil in which a strip-shaped metal plate is wound, and FIG. 9 is a conventional corrugated fin manufacturing method. FIG. 3 is a schematic side view showing a manufacturing apparatus for the purpose. 1: Flat tube, 2: Corrugated fin, 3: Core part, 4: Seat plate, 5:
Inlet pipe, 6: upper tank, 7: outlet pipe, 8: lower tank, 9: strip metal plate, 10: coil, 11: uncoiler, 12: guide roller, 1
3: Guide roller, 14: Tension roller, 15: Forming roller, 16: Base material, 17: Shaft, 18: Bit, 19: Straightening roller.

Claims (1)

[Claims] 1. A short cylindrical base material made of a metal material that constitutes a fin is rotated about an axis passing through the central portion of the base material, and a tool is provided near the outer peripheral surface of the base material. By cutting the outer peripheral surface of the base material to a constant thickness, a long thin metal strip is made, and these strips are meshed with each other 1
A method for manufacturing a fin that is fed between a pair of forming rollers.