JP2009078276A - Corrugating apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem of generating variations in corrugation heights, which occurs in a conventional corrugating apparatus because a corrugation shape is formed with male projections and die grooves without constraining the upper part of the corrugation shape. <P>SOLUTION: A corrugating apparatus has a re-striking body 14, which is attached to the lower part of an outlet side presser plate 12B displacably along the sending direction X of a plane plate 30. When forming a corrugation shape, a corrugation shape that is formed in advance is vertically and simultaneously re-struck by the re-striking body 14 and a positioning part 26. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a corrugated apparatus for forming corrugated products used for heat exchangers by forming a plurality of corrugations on a flat plate, and in particular, a wrist-like body provided at the lower part of an exit side pressing plate, With the positioning part used for positioning the flat plate when forming the corrugation, the corrugated height of the corrugated shape is restrained at the same time by re-striking the corrugated shape that was previously formed. The present invention relates to a new improvement that avoids cost increase and productivity deterioration.

  As this type of corrugating apparatus conventionally used, an apparatus disclosed in the following Patent Document 1 is used, and this apparatus is configured as shown in FIGS. FIG. 10 is a block diagram showing a conventional corrugating apparatus, and FIG. 11 is a block diagram showing an enlarged main part when the male mold 10 of FIG. 10 is lowered. In the figure, on the lower surface of the male mold 10, a male projection 11, an entry side holding plate 12 </ b> A, and an exit side holding plate 12 </ b> B are attached. Each pressing plate 12A, 12B is connected to the male mold 10 via a compression spring 13. On the upper surface of the female mold 20 disposed facing the male mold 10, first and second mold members 21 and 22 that can be opened and closed in accordance with the vertical movement of the male mold 10, and the male mold 10 and A product lifter 25 for lifting the flat plate 30 supplied between the female molds 20 is provided. The first and second mold members 21 and 22 form the mold 23 when they come into contact with each other (see FIG. 11). The first and second mold members 21 and 22 have first and second notches that form a mold groove 24 when the first and second mold members 21 and 22 form the mold 23. Portions 24a and 24b are provided. Further, the first mold member 21 includes a first positioning protrusion 26a formed continuously with the first notch 24a, and a second positioning protrusion 26b formed adjacent to the first positioning protrusion 26a. In addition, a positioning portion 26 including a positioning groove 26c formed between the first and second positioning protrusions 26a and 26b is provided.

Next, the operation of the conventional corrugating apparatus will be described. When the male mold 10 is lowered, the flat plate 30 is pressed by the pressing plates 12A and 12B, and the flat plate 30 is positioned. Next, the male mold 10 is further lowered, and the first and second mold members 21 and 22 are approached while the male protrusion 11 and the first and second mold parts 11 are lowered with the male mold 10. The flat plate 30 is pushed and bent by the mold members 21 and 22. Finally, the corrugation is formed by inserting the male projection 11 into the mold groove 24 formed in the mold 23. Next, after forming the corrugations, the male mold 10 is raised, and the first and second mold members 21 and 22 are separated from each other while the male protrusion 11 is detached from the corrugated product. The Thereafter, the flat plate 30 is lifted by the product lifter 25, and the flat plate 30 is fed by one pitch by a flat plate feeder (not shown).
Next, the corrugated previously formed is inserted into the positioning groove 26c, the male mold 10 is lowered again, and the flat plate 30 is pressed again by the pressing plates 12A and 12B. Positioning is performed. Thereafter, the male mold 10 is further lowered, and the first and second mold members 21 and 22 are approached while the male projection 11 is lowered together with the male mold 10 and the first and second molds. The flat plate 30 is pushed and bent by the mold members 21 and 22, and the male projection 11 is positioned in the mold groove 24 formed in the mold 23, thereby forming the next corrugation. . By repeating this operation, corrugations are continuously formed, and corrugated products used for heat exchangers and the like are manufactured from the flat plate 30.

JP-A-9-155461

  In the conventional corrugating apparatus as described above, since the corrugation is formed by the male projection 11 and the mold groove 24, the upper corrugation can be obtained by bending only along the first positioning projection 26a. It does not become a shape. For this reason, variations occur in the top and bottom shapes of the corrugations, resulting in variations in the corrugated peak height. If the corrugated peak height varies, the gap between the corrugated product and the fixed base material becomes large, making it difficult to join the two by welding or brazing. Further, if the corrugated peak height is corrected in a separate process, the cost increases due to an increase in the number of processes, and the productivity also deteriorates.

  The present invention has been made in order to solve the above-described problems, and its purpose is to suppress the variation in the corrugated peak height, and to avoid the cost increase and productivity deterioration due to the increase in the number of processes. It is to provide a corrugated processing device.

  The corrugated processing apparatus according to the present invention is provided with a male mold having a male protrusion and inlet and outlet pressing plates disposed on both sides of the male protrusion, and according to the vertical movement of the male mold. First and second mold members that are openable and closable are provided on the female mold, and the first and second cutting members that form mold grooves when the first and second mold members are in contact with each other to form a mold. A first positioning protrusion formed on the first and second mold members and having a notch formed continuously with the first notch, and a second positioning protrusion formed next to the first positioning protrusion And a positioning portion comprising a positioning groove formed between the first and second positioning projections is provided in the first mold member, and the male projection portion lowered together with the male mold is the mold groove. A wave shape is formed on the flat plate supplied between the male projection and the mold by being inserted into the mold. In the wave forming, the flat plate is pressed by the pressing plates, and the corrugation is performed by positioning the flat plate by positioning the wave shape formed in advance in the positioning groove. In the apparatus, a wrist-like body composed of first and second wrist-like protrusions and a wrist-like groove formed between the first and second wrist-like protrusions is provided below the outlet side pressing plate in the feeding direction of the flat plate. When the male mold is lowered, the first wrist-like protrusion is inserted into the positioning groove and the second positioning protrusion is inserted into the wrist-like groove. The previously formed corrugation is re-striated simultaneously at the top and bottom.

  According to the corrugating apparatus of the present invention, the wrist-like body provided in the lower part of the outlet side pressing plate so as to be displaceable along the feeding direction of the flat plate, and the positioning used for positioning the flat plate during the molding of the corrugated Since the wave shape formed in advance is re-striated simultaneously at the top and bottom, variations in the crest height can be suppressed, and cost increase and productivity deterioration due to an increase in the number of processes can be avoided.

The best mode for carrying out the present invention will be described below with reference to the drawings.
Embodiment 1 FIG.
FIG. 1 is a block diagram showing a corrugated apparatus according to Embodiment 1 of the present invention, FIG. 2 is an enlarged perspective view showing the periphery of the wrist-like body 14 of FIG. 1, and FIG. It is a block diagram which expands and shows the wristlike body and the positioning part. In addition, the same code | symbol is attached | subjected about the same or equivalent part as the conventional corrugated processing apparatus, and the description is abbreviate | omitted. As shown in FIG. 2, a storage groove 120 extending along the feed direction X of the flat plate 30 is provided at the lower part of the outlet side pressing plate 12 </ b> B. A guide body 15 including a base 15a and a pair of springs 15b is stored in the storage groove 120. The guide body 15 is provided in the feed direction X by, for example, a key and a key groove (not shown). Is attached to the lower part of the outlet side pressing plate 12B so as to be slidable along the outer side.

  At the bottom of the base 15a, first and second wrist-like protrusions 14a and 14b having different lengths extending downward, and a wrist formed between the first and second wrist-like protrusions 14a and 14b. The wrist-like body 14 composed of the like groove 14c is fixed. The deepest position of the wrist-like groove 14c is aligned with the lower surface 121 of the outlet side pressing plate 12B.

  The base 15a and the wrist-like body 14 are disposed so as to face the positioning portion 26 (see FIG. 1). That is, when the male mold 10 is lowered, the first wrist projection 14a is inserted into the positioning groove 26c (see FIG. 3), and the second positioning protrusion 26b (see FIG. 3) is inserted into the wrist like groove 14c. It is configured to be inserted. When the projections 14a and 26b are inserted into the grooves 26c and 14c, the base 15a and the wrist-like body 14 are moved in conjunction with the first mold member 21. The other end of the spring 15b is fixed to the end 120a of the storage groove 120, and the base 15a is always urged in one direction by the spring 15b. That is, the origin return along the feed direction X of the wrist-like body 14 is performed by the spring 15b.

  Next, the operation of the corrugating apparatus according to this embodiment will be described with reference to FIGS. First, as shown in FIG. 4, the product lifter 25 is lowered to insert the wave shape formed in advance into the positioning groove 26 c. Next, as shown in FIG. 5, the flat plate 30 is pressed by the pressing plates 12A and 12B to position the flat plate 30, and the first wrist-like protrusion 14a is inserted into the positioning groove 26c. The second positioning protrusion 26b is inserted into the wrist-like groove 14c. That is, simultaneously with the positioning of the flat plate 30, the wave shape formed in advance is re-striated simultaneously at the top and bottom. Next, as shown in FIG. 6, the male mold 10 is further lowered, and the first and second mold members 21 and 22 are approaching, while the male mold protrusion 11 and the first and second molds are moved. The flat plate 30 is pushed and bent by the mold members 21 and 22. At this time, in conjunction with the movement of the first mold member 21, the base 15a (see FIG. 2) and the wrist-like body 14 move in the direction opposite to the feed direction X. Then, the next corrugation is formed by inserting the male projection 11 into the mold groove 24 finally formed in the mold 23. Then, as shown in FIG. 7, the male mold 10 is raised, and the first and second mold members 21 and 22 are separated from each other while the male mold protrusion 11 is detached from the corrugated product. The return of the origin along the feed direction X of the wrist-like body 14 is performed by the spring 15b (see FIG. 2).

  Next, the wrist-like action by the wrist-like body 14 and the positioning portion 26 will be described. FIG. 8 is an explanatory view showing the corrugation formed on the flat plate 30 of FIG. 1 before the re-striking is performed, and FIG. 9 is the corrugation formed on the flat plate 30 of FIG. 1 after the re-striking is performed. It is explanatory drawing which shows. When the wristwatch is not performed as in the conventional apparatus, the upper side of the corrugation is not restrained and only bends along the first positioning protrusion 26a. Compressive stress is generated inside the corrugated bend during processing, and tensile stress is generated outside, and after the mold is released from the plate, the tensile stress P1 remains inside the bend as shown in FIG. The compressive stress P2 remains outside. For this reason, springback occurs, and the bending R and the opening angle increase.

  On the other hand, when the wristwatch is performed as in the apparatus of this embodiment, the inner material is stretched in the circumferential direction by strongly pressing the inner side of the corrugated bent portion. For this reason, after processing, as shown in FIG. 9, spring go is induced by shrinkage in the circumferential direction due to recovery of elastic deformation inside the bent portion. As a result, the opening angle and the bending radius R of the bent portion are reduced.

  Next, more specific examples will be given. As a test material, a ferrite stainless steel flat plate 30 having mechanical characteristics as shown in Table 1 below in the L direction parallel to the rolling direction and having a width of 125 mm and a plate thickness of 0.4 mm is used. A corrugated product having the L direction as the longitudinal direction was produced. In addition, the tip radius R of the male projection 11 was 0.4 mm, the taper angle of the male projection 11 was 9 °, and the depth of the mold groove 24 was 38 mm. Rp1 and Rp2, which are tip radii R of the first wrist-like protrusion 14a and the second positioning protrusion 26b, were 0.4 mm, and the taper angles θ1 and θ2 were 9 °. The depth of the wrist-like groove 14c and the positioning groove 26c was 38 mm, and the R (Rd1, Rd2) of the groove was 0.8 mm.

  While forming the corrugation under these processing conditions, 20 like ridges were formed and the measured values were averaged. As a result, the upper and lower outer radii R of the corrugation were 0.65 mm. Further, the opening angle of the corrugation was in the range of 2 to 3 ° both above and below, and the variation was small. The variation in peak height was within the range of 0.03 to 0.1 mm.

  On the other hand, as a result of measuring and averaging the processed products when the re-striking was not performed as in the conventional apparatus, the outer radius R of the lower corrugation was 0.65 mm, whereas the outer radius R of the upper portion was Was 0.8-1.0 mm. Further, the opening angle of the corrugation at this time was in the range of 2 to 4 ° at the lower part, but was in the range of 2 to 9 ° at the upper part, and the variation was large. Further, the variation in peak height was in the range of 0.17 to 0.25 mm.

  In such a corrugated processing apparatus, the wrist-like body 14 provided in the lower part of the outlet side pressing plate 12B so as to be displaceable along the feed direction X of the flat plate 30, and the positioning of the flat plate 30 when the corrugation is formed. Since the wave shape formed in advance is re-striated simultaneously with the positioning portion 26 to be used, it is possible to suppress the fluctuation of the wave height of the wave shape, and to avoid the cost increase and productivity deterioration due to the increase in the number of processes. . In addition, the wrist-like can further reduce the interval between the corrugated vertical walls, thereby improving the efficiency of the heat exchanger.

It is a block diagram which shows the corrugated processing apparatus by Embodiment 1 of this invention. It is a perspective view which expands and shows the periphery of the wrist-like body of FIG. It is a block diagram which expands and shows the wrist-like body and positioning part of FIG. It is explanatory drawing which shows the state which the product lifter of FIG. 1 fell. It is explanatory drawing which shows the state by which the wave shape shape | molded prior to the flat plate of FIG. It is explanatory drawing which shows the state by which a new waveform is shape | molded by the flat plate of FIG. It is explanatory drawing which shows the state by which the wrist-like body of FIG. 6 was returned to the origin. It is explanatory drawing which shows the waveform provided in the flat plate of FIG. 1 before a restrak is performed. It is explanatory drawing which shows the waveform provided in the flat plate of FIG. It is a block diagram which shows the conventional waveform processing apparatus. It is a block diagram which expands and shows the principal part when the male type | mold of FIG. 10 is dropped.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 Male type | mold, 11 Male type | mold projection part, 12A Inlet side pressing plate, 12B Outlet side pressing plate, 13 Compression spring, 14 Wrist-like body, 14a, 14b First and second wrist-like protrusion, 14c Wrist-like groove, 15 Guide Body, 15a base, 15b spring, 20 female mold, 21, 22 first and second mold member, 23 mold, 24 mold groove, 24a, 24b first and second notch, 25 product lifter, 26 positioning part, 26a, 26b 1st and 2nd positioning protrusion, 26c positioning groove, 30 flat plate.

Claims (1)

A male protrusion (11) and inlet and outlet pressing plates (12A, 12B) disposed on both sides of the male protrusion (11) are provided on the male mold (10), and the male mold (10 The first and second mold members (21, 22) that can be opened and closed in accordance with the vertical movement of the female mold (20) are provided on the female mold (20), and the first and second mold members (21, 22) are in contact with each other. The first and second mold members (21, 22) are provided with first and second notches (24a, 24b) for forming a mold groove (24) when the metal mold (23) is formed. A first positioning protrusion (26a) formed continuously to the first notch (24a), and a second positioning protrusion (26b) formed next to the first positioning protrusion (26a), The positioning groove (26c) formed between the first and second positioning protrusions (26a, 26b). A positioning part (26) is provided on the first mold member (21), and the male protrusion (11) lowered together with the male mold (10) is inserted into the mold groove (24). Thus, a corrugation is formed on the flat plate (30) supplied between the male projection (11) and the mold (23), and the flat plate (30) is formed during the forming of the corrugation. ) Is pressed by the respective pressing plates (12A, 12B), and the corrugated processing device is used to position the flat plate (30) by positioning the corrugated previously formed in the positioning groove (26c). In
A wrist-like body (14) comprising first and second wrist-like protrusions (14a, 14b) and a wrist-like groove (14c) formed between the first and second wrist-like protrusions (14a, 14b). The lower side of the outlet side pressing plate (12B) is provided so as to be displaceable along the feeding direction (X) of the flat plate (30),
When the male mold (10) is lowered, the first wrist protrusion (14a) is inserted into the positioning groove (26c) and the second positioning protrusion (26b) is inserted into the wrist groove (14c). The corrugation processing apparatus is characterized in that the corrugation formed in advance is re-striated at the same time up and down by inserting.

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