JPS6317531B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for manufacturing corrugated fins used in heat exchangers such as car heaters and car coolers.

The conventional manufacturing method of this type of fin will be explained with reference to FIG.
When material 31 is fed into the meshing part of 2 and 33,
The material 31 is formed into a corrugated sheet band 31A. When the corrugated sheet band 31A reaches a predetermined length, it is cut with a cutting material 34, thereby making it possible to manufacture a desired corrugated fin 35.

The above method is applicable only when the ridge line of the waveform and its end face are at a right angle, but it is extremely difficult to obtain an inclined waveform with an arbitrary angle β other than the right angle. In order to obtain the inclined waveform, it is possible to feed the material diagonally to the tooth traces of the gear, or to make the gear a helical gear.

However, in the former method, the position where the material is bited gradually moves in the direction of the tooth trace, and the material eventually separates from the gear, making continuous molding impossible. In addition, in the latter method, due to the meshing characteristics of helical gears, the waveform of one peak gradually advances from one end, so there is a disadvantage that the material may be damaged due to large local stress changes. Furthermore, since it requires advanced technology such as implanting teeth for louver processing on all tooth surfaces of the gear, not only is the production cost high, but there is a risk that the production period will be extended.

The present invention solves the above-mentioned drawbacks; firstly, it simplifies the forming of inclined waveforms and louver processing, and secondly, it aims to make it possible to manufacture corrugated fins with high efficiency. The method is to first form the strip material so that the waveform apex angle is almost the same.
It is formed into a wavy band with an angle of 90° or 70° to 110°, and louver processing is performed at the same time or after the forming process, and then the corrugated band is formed so that the wave apex angle is a predetermined angle by a second forming process. This method is characterized in that it is formed into a corrugated sheet band having an inclined waveform, and then cut into a predetermined length.

Further, the manufacturing device of the present invention includes a movable base movably attached to the fixed base, a convex fixed upper mold fixed to the movable base, and a convex movable upper mold that moves up and down along the fixed upper mold. , a push-down mechanism that constantly urges the movable upper mold downward; a concave fixed lower mold fixed to the fixed base and opposed to the fixed upper mold; The movable lower mold has a concave shape and is disposed opposite to the fixed upper mold and the movable upper mold, and a push-up mechanism that constantly urges the movable lower mold upward. A recess and a half-split recess are provided on the upper surface of the fixed lower mold, respectively.

Embodiments of the present invention will be described below with reference to the drawings.

First, the principle of the embodiment of the manufacturing method of the present invention will be explained with reference to FIGS. 2 and 3. 1 is a material having a predetermined thickness and width, and 2 is an angle α (<90°) with respect to the side surface of the material 1. 3 and 5 are primary and secondary feeding mechanisms that transport the corrugated sheet bands 1A and 1B; 4 is a louvered surface of the corrugated sheet band 1A; A louver processing machine, 6 a secondary forming machine that shapes the corrugated apex angle of the corrugated sheet band 1B to a predetermined angle, 7 a cutting machine that cuts the corrugated sheet band 1C to a predetermined length, and 8 a desired corrugated fin. It is.

The material 1 is fed into the primary forming machine 2 and formed into a corrugated plate band 1A with a corrugated apex angle of 90°, and then transferred pitch by pitch by the primary feeding mechanism 3 and sent to the louver processing machine 4. The louver processing machine 4 processes a louver (not shown) on the corrugated belly surface of the corrugated sheet band 1A to form the corrugated sheet band 1B. This corrugated sheet band 1B
is transferred pitch by pitch by the secondary feeding mechanism 5 and sent to the secondary molding machine 6.
As a result, a corrugated plate band 1C having an inclined waveform having a wave apex angle formed at a predetermined angle is formed. Next, the number of ridges of the corrugated sheet band 1C is measured by an appropriate mechanism, and when a predetermined number of ridges is reached, the corrugated sheet band 1C is cut by the cutting machine 7, thereby manufacturing the desired corrugated fin 8. can.

Corrugated sheet band 1 formed by the above-mentioned secondary forming machine 6
For C, the angle between the ridgeline of the waveform and the side surface is β. This angle β is the inclination angle of the desired waveform,
The relationship between α and β can be determined from the peaks, heights, and pitches of the waveform. Further, the operations of the molding machines 2 and 6, the louver processing machine 4, the feeding mechanisms 3 and 5, and the cutting machine 7 are set to be mechanically or electrically synchronized. Furthermore, when changing the type of corrugated fins, it is only necessary to change the tip portions of each molding machine 2, 6.

FIG. 4 shows another embodiment, and the difference between this embodiment and the embodiment shown in FIG.
The primary forming and louver processing are performed by A, and the louver processing is performed immediately after the completion of the primary forming. This configuration has the advantage that the entire device can be simplified and positioning for louver processing can be performed easily and accurately.

Next, an embodiment of the manufacturing apparatus of the present invention is shown in Figures 5 to 7.
To explain the figures, 9 is a fixed base, 10 is a movable base movably attached to a guide shaft 11 fixed to the fixed base 9 via a reaction spring 12, and 13 is a tip fixed to the movable base 10. A fixed upper mold 14 having a convex portion (lower surface) (V-shaped in the figure) is provided so as to be freely movable along the fixed upper mold 13 via an upper guide pin 15 and a push-down spring 16. This is a movable upper mold with a convex tip (V-shaped in the figure).

Reference numeral 17 indicates a fixed lower mold which is fixed to the fixed base 9 and is opposite to the fixed upper mold 13, and has a concave upper surface (half V-shaped groove in the figure); 18 is a fixed upper mold 13 and a movable upper mold. 14, and is provided so as to be freely movable along the fixed lower die 17 via the lower guide pin 19 and the push-up spring 20, and has a concave upper surface (in the figure, it has one V-shaped groove and a half-shaped groove). This is a movable lower die formed in a shape (having a V-shaped groove). Reference numeral 21 denotes a material guide fixed to the fixed base 9, and the material guide 21 is set to feed the material 1 while regulating it at an arbitrary angle with respect to the mold. Further, the push-up spring 20 is the push-down spring 16.
It is set to have a larger spring force.

Next, the operation of this embodiment configured as described above will be explained.

As shown in FIG. 8a, when the already formed part of the material 1 is joined to the groove 18a of the movable lower mold 18 and the movable upper mold 14 is lowered, the movable upper mold 1
4 presses the already formed part. If the movable upper mold 14 is further lowered, the fixed upper mold 13 will be lowered as shown in FIG. 8b.
bends material 1. At this time, the force of the push-up spring 20 pushing up the movable lower die 18 is stronger than the force of the push-down spring 16 pushing down the movable upper die 14, so the movable lower die 14 does not descend. When the fixed upper mold 13 is further lowered, the movable lower mold 18 is also lowered as shown in FIG. 8c, and the material 1 is bent again to form one pitch of waveform.

When the upper mold 13 is then raised, the upper and lower movable molds 14 and 18 are returned to their original states as shown in FIG. 8a by the forces of the respective springs 16 and 20. Now move the newly formed part of material 1 to lower mold 1.
After moving it to the groove 18a of No. 8, the fixed upper mold 1 is moved again.
3 and repeat the operations shown in FIGS. 8b and 8c. By continuously repeating the above operations,
While being molded, the material 1 moves from left to right one pitch at a time, forming a waveform.

Next, to form an inclined waveform, as shown in Fig. 9, the material guide 21 is installed at an angle of α° relative to the movable base 10 of the molding machine, and the material 1 is also formed while maintaining the inclination angle α. installed on the machine. In this molding machine, the material 1 is molded and sent out as a corrugated sheet band 1A, and the ridgeline of the waveform of the corrugated sheet band 1A is inclined at an angle β with respect to both side surfaces. Molding by the molding machine is performed one pitch at a time, but the feeding mechanism 21 shown in FIG. 10 works to feed the work piece intermittently in conjunction with the vertical movement of the movable base 10.

If the louver processing blades 22a and 22b are respectively fixed to the inclined surfaces of the tips of the movable upper die 14 and the movable lower die 18 as shown in FIG.
There is an advantage that the louver can be processed simultaneously during the process shown in FIG. b.

As explained above, according to the first aspect of the present invention, it is possible to simplify the forming of a corrugated sheet band having an inclined waveform and the processing of a louver, and according to the second aspect of the present invention, an efficient inclined corrugated corrugated fin can be manufactured. Can be done.

[Brief explanation of the drawing]

FIG. 1 is a diagram illustrating a conventional method of manufacturing a corrugated fin, FIGS. 2 and 3 are plan views showing an embodiment of the method of manufacturing a corrugated fin of the present invention, and FIG. 4 is a diagram illustrating a method of manufacturing a corrugated fin of the present invention Figures 5 to 7 are front views, side views, and plan views showing one embodiment of the corrugated fin manufacturing apparatus of the present invention, and Figures 8 a to 8 c are diagrams showing other embodiments. An explanatory diagram showing the molding sequence, FIGS. 9 and 10 are a plan view and a front view showing how the corrugated fin manufacturing apparatus of the present invention is used, and FIG. 11 is a waveform having a louver processing function used in the present invention. It is a figure showing a mold for shaping. 1...Material, 2, 6...First and second molding machines, 4...Louver processing machine, 7...Cutting machine, 9...Fixed base, 10
...Moving base, 13...Fixed upper die, 14...Moving upper die, 16, 20...Spring, 17...Fixed lower die, 18...
Moving lower mold.

Claims (1)

[Claims] 1. Feed the strip-shaped material into a wave-forming means installed so as to form an angle α (<90°) with the side surface of the strip-shaped material,
The strip-shaped material is formed into a corrugated sheet band in which the apex angle of the corrugation is approximately 90° and the angle between the ridge line and the side surface of the corrugated sheet is inclined at 90° or less, and A louver is formed, and the corrugated sheet band after the louver formation is formed such that the waveform apex angle forms a predetermined angle, and the angle between the ridgeline of the waveform and the side surface is a predetermined angle β (α).
1. A method for manufacturing a corrugated fin, which comprises forming a corrugated sheet band having an inclination to a slope, and cutting the corrugated fin to a predetermined length to obtain an inclined corrugated fin. 2. A movable base movably attached to a fixed base, a convex fixed upper mold fixed to this movable base, a convex movable upper mold that moves up and down along this fixed upper mold, and this movable upper mold. a push-down mechanism that constantly urges downward; a concave fixed lower mold fixed to the fixed base and opposed to the fixed upper mold; and a fixed upper mold that moves up and down along the fixed lower mold; It consists of a concave movable lower mold that is opposed to the mold and the movable upper mold, and a push-up mechanism that constantly urges the movable lower mold upward, and the upper surface of the movable lower mold has one recess and a half-split recess. A corrugate fin manufacturing apparatus, wherein a half-split recess is provided on the upper surface of the fixed lower mold. 3. The corrugate fin manufacturing apparatus according to claim 2, wherein louver processing blades are attached to the slopes of the movable upper die and the movable lower die.