JPH0592328A - Fin part working method for plate fin heat-exchanger - Google Patents

Abstract

PURPOSE:To enhance the accuracy and workability in cutting wavelike fins, concerning the working method of the fin parts of a plate fin heat-exchanger. CONSTITUTION:A cement material 12 is filled into the recessed parts of wavelike fin materials 4 to form a platelike material 13 as a whole, and after the platelike material 13 has been cut, the cement material 12 is removed. By forming the fin materials in a platelike material 13, the thickness can be made uniform, so that the dispersion in the cutting condition can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for processing a fin portion of a plate fin heat exchanger.

[0002]

2. Description of the Related Art FIG. 5 and FIG.
1 shows an example of the structure of the plate fin heat exchanger disclosed in Japanese Patent No. 172. In the figure, reference numeral 1 is a casing, 2 is a side block, 3 is a separator, 4 is a corrugated fin, 5 is a heat exchange passage, 6 is a high temperature passage, 7 is a low temperature passage,
6a and 7a are small flow paths, 8 is both front plates, 9 is a connection flow path, 10
A and 10B are headers for high temperature fluid merging, and 11A and 11B are headers for low temperature fluid merging.

In the plate fin heat exchanger having such a structure, between the high temperature fluid merging headers 10A and 10B,
A high temperature fluid is inserted as shown by a solid arrow in FIG. 5, and both low temperature fluid merging headers 11A and 11 are inserted.
Heat exchange is performed by inserting a low temperature fluid between B as shown by the broken line arrow in FIG. 5, and at that time, in the heat exchange flow path 5 and the connection flow path 9, By increasing the contact area between the shaped fins 4 and the fluid, the heat exchange efficiency is improved, and the heat exchange efficiency is higher than other general heat exchangers. It is considered that the exchange fluid is suitable for heat exchange between gas and gas such as high-temperature gas and low-temperature air, and can be downsized based on high heat exchange efficiency.

[0004]

However, the corrugated fins 4 in such a plate fin heat exchanger have a problem in the cutting processing technique. That is, the wavy fins 4
As shown in FIG. 6, the horizontal cross-sectional shape of the horizontal section 4a includes a horizontal section 4a extending in the width direction and a vertical section 4b standing upright.
Since the rigidity in the thickness direction is remarkably different, the horizontal portion 4a is more easily deformed than the vertical portion 4b when cutting is performed, and the cutting conditions such as the rigidity and the cutting thickness vary depending on the location. In addition, when a cutting operation is performed by a general cutting machine, processing distortion occurs on the cut surface or "burrs" are generated, and the cutting accuracy is reduced. Further, in the case of laser cutting, the amount of heat required for cutting the horizontal portion 4a and the vertical portion 4b is significantly different, so that the cutting accuracy is likely to decrease. Further, as in the example shown in FIG.
The corrugated fins 4 need to be cut obliquely at the portion connecting the connection flow path 9 and the connection flow path 9, and when the connection flow path is arranged around the fluid merging header, the corrugated fins 4 are also formed. Since it becomes necessary to cut and process the arc into a complicated shape such as an arc shape, it becomes difficult to maintain the accuracy of the cut and processed portion.

The present invention effectively solves the problems of the prior art. That is, the purpose is to reduce the change in the cutting thickness, impart uniform cutting conditions to the corrugated fins to improve workability, and improve the cutting accuracy.

[0006]

In order to achieve the above object, in the method for processing a fin portion of a plate fin heat exchanger according to the present invention, separator plates arranged at parallel intervals and arranged between the separator plates. When cutting corrugated fins of a heat exchanger having corrugated fins that form a plurality of stacked heat exchange channels in parallel, the concave portions on both sides of the corrugated fin material are filled with cement material and solidified. Structure comprising a step of forming a plate-shaped material in a state of being cut, a step of cutting and processing the plate-shaped material to set the shape of the corrugated fins, and a step of removing the solidified cement material adhering to the corrugated fins Has been adopted.

[0007]

[Function] By filling the concave portion of the corrugated fin with the cement material, a plate-like material having a small change in thickness is formed. When this plate-like material is cut and processed, the difference in rigidity between the parts is less likely to occur, and therefore the cutting load is increased. Be uniform. Further, by integrating the solidified cement material and the corrugated fins, the deformation of the corrugated fins is suppressed, and it becomes possible to apply uniform cutting conditions to the corrugated fins.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for processing a fin portion of a plate fin heat exchanger according to the present invention will be described below in order of steps with reference to FIGS.

<State of corrugated fins before cutting> FIG.
Shows the state of the corrugated fins 4 before cutting.
The corrugated fin 4 has a plurality of recesses 4c surrounded by a horizontal portion 4a and a pair of left and right vertical portions 4b on both sides thereof.

<Forming of plate-like material by filling with cement material>
As shown in FIG. 2, in both concave portions 4c of the corrugated fin material 4,
The cement material 12 is filled into a solidified state. As the cement material 12, for example, a mixture of mortar type cement with about 50% of iron powder is applied, and the corrugated fin material 4 and the cement material 12 are integrated by solidification after filling,
The plate-shaped material 13 has a constant thickness.

<Cutting of plate-shaped material> As shown in FIG.
A desired cutting line L such as a slant is set on the plate-like material 13,
The plate-shaped material 13 is cut along the cutting line L by operating an appropriate cutting machine 14 such as a grinding wheel. The shape of the corrugated fins 4 is set by this cutting process.
When the plate-shaped material 13 is cut and processed, the horizontal portions 4a and the vertical portions 4b of the corrugated fins 4 are integrated with the solidified cement material 12 and are hardly deformed. Since the thickness is made uniform and the rigidity in each part is substantially equal, there is little variation in the cutting load, and it is possible to obtain a smooth cut C with almost no change in the cutting conditions.

<Removal of Cement Material> After the cutting of the plate-shaped material 13 is completed, the cement material 12 in a solidified state adhered to the concave portions 4c of the corrugated fins 4 is removed. Wavy fin 4
Is stainless steel, the wettability with the cement material 12 is poor, so the cement material 12 can be relatively easily peeled from each recess 4c. It should be noted that a release material such as silicone may be used in the recess 4c in order to facilitate peeling. FIG. 4 shows the corrugated fins 4 having a desired shape by removing the cement material 12.

<Other Embodiments> In the present invention, the following technique can be adopted instead of the above-mentioned one embodiment. The cutting line L must be something other than an oblique straight line, a curved line, an arc, a circle, or the like. Simultaneously cutting a plurality of corrugated fins 4 into the same shape with the plate-shaped members 13 stacked. Use the cement material 12 made of an optional material. At that time, the cement material 12 should be removed by an arbitrary method such as peeling, crushing, or heat melting.

[0014]

As described above, according to the plate fin heat exchanger fin portion processing method of the present invention, after the concave portions on both sides of the corrugated fin material are filled with the cement material to form the plate-shaped material. Since the plate-shaped material is cut and processed to set the shape of the corrugated fins and then the solidified cement material adhering to the corrugated fins is removed, the following effects are achieved. (1) Since the corrugated fins and the solidified cement material are in an integrated state, each part of the corrugated fins is hardly deformed during the cutting work, and highly accurate cutting can be performed. (2) Since the thickness of the whole is uniform and the rigidity of each part is almost the same, the fluctuation of the cutting load is small,
The workability can be improved by stabilizing the cutting process with almost no change in the cutting conditions. (3) By cutting as a plate-shaped material, the cutting line can be set in accordance with a desired shape. (4) It is possible to cut a plurality of corrugated fins into the same shape at the same time with the plate-shaped materials stacked, and to improve work efficiency.

[Brief description of drawings]

FIG. 1 is a front view showing a state of a corrugated fin before cutting in an example of an implementation step of a method for processing a fin portion of a plate fin heat exchanger according to the present invention.

FIG. 2 is a front view showing a plate-like body formed by filling all recesses of the corrugated fin material of FIG. 1 with a cement material.

FIG. 3 is a perspective view showing a cutting state of the plate-shaped body of FIG.

4 is a perspective view showing a corrugated fin in a completed state after the step of FIG.

FIG. 5 is a plan view showing a conventional example of a plate fin heat exchanger.

6 is a view taken along the line FF of FIG.

[Explanation of symbols]

 3 Separator 4 Wave-shaped fin (wave-shaped fin material) 4a Horizontal part 4b Vertical part 4c Recess 5 Heat exchange flow path 9 Connection flow path 10A High temperature fluid merging header 10B High temperature fluid merging header 11A Low temperature fluid merging header 11B Low temperature Fluid confluence header 12 Cement material 13 Plate material 14 Cutting machine L Cutting line C Cutting edge

Claims (1)

[Claims] 1. A corrugated fin of a heat exchanger, comprising: separators arranged at parallel intervals; and corrugated fins arranged in parallel to form a plurality of stacked heat exchange passages in parallel. And a method of cutting the corrugated fin material into a plate-like material in a state where the concave parts on both sides of the corrugated fin material are filled with cement material and solidified, and the plate-shaped material is cut and processed to form the corrugated fin shape. And a step of removing the solidified cement material adhering to the corrugated fins, the plate fin heat exchanger fin portion processing method.