JP2008087033A - Method and device for forming corrugated sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and a device for forming a corrugated sheet, by which working capacity is improved when forming a sheet into a continuous corrugated shape by a press. <P>SOLUTION: A method for forming a corrugated sheet continuously directs to form a strip material 10, which is progressively fed from a material feeding part 101, into a corrugated shape by a press 102. One pressing process performed by the press 102 includes a constraining step of constraining the side of the corrugated shape, which is already formed on the strip 10, and a corrugated shape forming step of forming a plurality of ridges of the corrugated shape by progressively forming a ridge of the corrugated shape one by one from the side constrained by the constraining step toward the side of the material feeding part 101. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a method for forming a corrugated plate material suitable for use in forming corrugated fins for heat exchangers, for example, and a molding apparatus therefor.

As a forming apparatus (forming method) for a corrugated plate material using a conventional press machine, for example, one disclosed in Patent Document 1 is known. That is, this forming apparatus has a rectangular corrugated forming portion provided with a convex punch and a concave die, and the rectangular corrugated forming portion allows a single wave to be applied to the band plate material by one press. In addition to forming the shape, it is possible to form a continuous wave shape on the strip material by repeating the feeding and pressing of the strip material.
JP 2004-230452 A

  However, in the above molding apparatus, only one wave shape is formed in one press, so the processing capability of the press is determined only by the processing speed of the press machine, and the upper limit of the processing speed is the upper limit of the processing capability. It had been.

  Therefore, if a plurality of undulations can be formed with a single press, the machining capability can be improved accordingly. However, as shown in FIG. Since the material is stretched on both wave sides at the portion between the corrugations in the strip 10 and breaks, the processing capability cannot be easily improved.

  In view of the above problems, an object of the present invention is to provide a method for forming a corrugated plate material and a forming apparatus thereof that can improve the processing capability in forming a continuous corrugated shape on a plate material using a press. is there.

  In order to achieve the above object, the present invention employs the following technical means.

  The invention according to claim 1 is a method for forming a corrugated plate material in which a corrugated shape is continuously formed on a strip material (10) fed forward from a material feed section (101) using a press machine (102). Then, during one press of the press machine (102), a constraining step of constraining the corrugated side already formed on the strip plate material (10), and a material feeding unit (101) from the side constrained in the constraining step And a wave shape forming step of forming a plurality of wave shapes one by one toward the side.

  This restrains the wave-shaped side of the band plate material (10), and forms the wave shape one by one in the direction of the material feed part (101), thereby forming the material feed part (101) side. Since it becomes possible to form a wave shape one by one while pulling the material from, it is possible to form a plurality of wave shapes with a single press without causing breakage of the strip material (10), thereby improving the processing capability. .

  The invention described in claim 2 relates to a corrugated plate material forming apparatus for continuously forming corrugated shapes on a strip material (10) fed forward from a material feed section (101) using a press machine (102). And a restraint portion (110) restraining the corrugated side already formed on the band plate material (10) and a side restrained by the restraint portion (110) during one press of the press machine (102) A wave shape forming portion (120) for forming a plurality of wave shapes one by one in order from the material toward the material feeding portion (101) side.

  Thereby, it can be set as the apparatus which implement | achieves the shaping | molding method of the corrugated board | plate material of Claim 1.

  In the invention according to claim 2, as in the invention according to claim 3, the restraint portion (110) is disposed on the upper die (103) of the press machine (102) and restrains the corrugated side. And the corrugated part (120) is arranged in order in the upper mold (103) so as to line up toward the material feed part (101) side of the restraining punch (111), A plurality of corrugated punches (121, 122) for forming corrugations one by one are provided, and the lower end positions of the plural corrugated punches (121, 122) and the restraining punch (111) From the portion (101) side toward the restraining punch (111) side in order by the corrugated depth, and the most material feeding portion (among the plurality of corrugated punches (121, 122)) 101) Reference side punch (close to the side) The other punches (111, 121) except 22) are fitted into the lower die (104) of the press machine (102), and the difference between the lower end position and the reference side punch (122) is the upper die (103). It may be formed so as to be absorbed on the side.

  Furthermore, the absorption to the upper mold | type (103) side of the difference with said lower end position can be comprised by the spring member (114,125) like invention of Claim 4. FIG.

  The invention according to claim 5 includes load detection means (150) for detecting the spring load of the spring member (125) in the corrugated punch (121) excluding the reference side punch (122), and the load detection means (150). ) Is provided with an underload stop means for stopping the operation of the press machine (102) when the spring load detected by (2) falls below a predetermined load.

  As a result, the press machine (102) is stopped even if the spring load of the spring member (125) is insufficient due to the change over time of continuous use of the press machine (102), so the spring load remains insufficient. Waveforms can be prevented from being formed, and defective products can be prevented from being continuously formed.

  The invention according to claim 6 further comprises position detecting means (160) for detecting a position where the corrugated punch (121) excluding the reference side punch (122) fits into the lower mold (104), and the position detecting means ( 160) is provided with improper position stopping means for stopping the operation of the press machine (102) when the position to be fitted detected by (160) does not reach the predetermined position.

  As a result, the press machine (102) is stopped even if an improper state of the position where the corrugated punch (121) fits due to a change with time in continuous use of the press machine (102), so A wave shape can be prevented from being formed in an inappropriate position, and defective products can be prevented from being continuously formed.

  In addition, the code | symbol in the bracket | parenthesis of each said means shows a corresponding relationship with the specific means of embodiment description mentioned later.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. A corrugated plate material forming apparatus (hereinafter referred to as a forming apparatus) 100 according to the first embodiment is, for example, an inner fin 11 (FIG. 2) disposed in a tube that serves as an oil flow path of an oil cooler for cooling oil of a vehicle engine. (B)) is an apparatus for molding.

  The molding apparatus 100 includes a material feeding unit 101 and a press machine 102. The material feeding unit 101 supplies the strip plate material 10 wound in a coil shape to the press machine 102. The material feeding portion 101 is the number of wave shapes formed on the strip plate material 10 for each press of the press machine 102 so that the longitudinal direction of the strip plate material 10 (arrow direction in FIG. 1) is directed to the press machine 102. The material is fed in the amount corresponding to (here, two mountains). The material feeding unit 101 is in a free state during the pressing of the press machine 102, and allows the material feeding by allowing the strip 10 to be pulled to the press machine 102 by the press.

  The press machine 102 includes an upper mold 103 that is movable in the vertical direction with respect to the lower mold 104, and is continuously rectangular (V-shaped) in the longitudinal direction of the strip 10 as shown in FIG. The V-bending part 102A for forming the wave shape (the state of the V-bending product 11a), and the offset part at predetermined intervals in the width direction of each wave-shaped band plate member 10 as shown in FIG. And a cut-and-bent forming portion 102 </ b> B that forms the inner fin 11 by cutting and bending 11 b.

  The V bend forming part 102 </ b> A includes a restraining part 110 and a wave shape forming part 120. The restraining portion 110 is a mechanism portion that restrains (fixes) the band plate material 10 (in the state of the V-bending molded product 11a) by pressing the corrugated shape formed by the corrugated forming portion 120, and is a pilot as a restraining punch. It has a punch 111 and a die 115 on the receiving side. The die 115 is a block-like member fixed to the lower die 115, and is disposed in two regions of the restraining portion 110 and the corrugated forming portion 120. The upper end side corresponds to the corrugated shape. A plurality of (in this case, four) concave portions are formed so as to be arranged in the longitudinal direction of the strip plate material 10.

  The pilot punch 111 is a block-shaped member, and a plurality of (two in this case) protrusions 111 a corresponding to the wave shape are formed on the lower end side thereof so as to be arranged in the longitudinal direction of the band plate material 10. The protrusions 111 a are formed so as to fit into the recesses of the die 115 by forming a gap corresponding to the thickness of the strip plate 10. An elongated cylindrical shaft portion 112 and a cylindrical receiving portion 113 having a diameter larger than that of the shaft portion 112 are sequentially connected to the upper end side of the pilot punch 111. The upper mold 103 is formed such that a two-stage hole portion 103a corresponding to the outer diameter of the shaft portion 112 in the lower region and corresponding to the outer diameter of the receiving portion 113 in the upper region passes therethrough. The shaft portion 112 and the receiving portion 113 are accommodated in the hole portion 103 a so that the pilot punch 111 can slide up and down with respect to the upper mold 103.

  A spring (corresponding to a spring member in the present invention) 114 is provided above the receiving portion 113. The upper end side of the spring 114 is fixed to the upper mold 103, the lower end side of the spring 114 is in contact with the upper surface of the receiving portion 113, and the spring 114 biases the receiving portion 113 downward. More specifically, as shown in FIG. 3A, the spring 114 hits the stepped portion where the upper portion 103 is open and the receiving portion 113 is the middle portion of the hole portion 103a, and the pilot punch 111 is lowered most. Energized to be in position. Then, when the upper die 103 is lowered and the pilot punch 111 is fitted into the die 115 (when the V-bending molded product 11a is sandwiched), the pilot punch 111 is stopped. Further, when the upper mold 103 is lowered, the spring 114 is pressed and contracted by the reaction force from the receiving portion 113 ((c) and (d) in FIG. 3).

  The wave shape forming portion 120 is a mechanism portion for forming a wave shape on the band plate material 10, and is disposed on the material feeding portion 101 side of the restraining portion 110. The wave shape forming unit 120 includes a plurality of punches as wave shape forming punches, here, a first punch 121 and a second punch 122. The first punch 121 and the second punch 122 are arranged in order with respect to the pilot punch 111 on the material feeding unit 101 side. Of the punches 121 and 122, the second punch 122 closest to the material feeding unit 101 corresponds to the reference side punch of the present invention.

  Each of the punches 121 and 122 is a block-like member, and one (a total of two) protrusions 121a and 122a corresponding to the wave shape are formed on the lower end side thereof. Therefore, the protrusions 121 a and 122 a of the punches 121 and 122 are arranged so as to be continuously arranged with the protrusion 111 a of the pilot punch 111.

  The protrusion 121a of the first punch 121 is formed so as to be fitted into the recess of the die 115 by forming a gap corresponding to the plate thickness of the strip plate material 10 in the same manner as the protrusion 111a of the pilot punch 111. Yes. An elongated cylindrical shaft portion 123 and a cylindrical receiving portion 124 having a diameter larger than that of the shaft portion 123 are sequentially connected to the upper end side of the first punch 121. The upper mold 103 is formed such that a two-stage hole 103b corresponding to the outer diameter of the shaft portion 123 in the lower region and corresponding to the outer diameter of the receiving portion 124 in the upper region passes therethrough. The shaft portion 123 and the receiving portion 124 are accommodated in the hole portion 103b so that the first punch 121 can slide up and down with respect to the upper mold 103.

  A spring (corresponding to a spring member in the present invention) 125 is provided above the receiving portion 124. The upper end side of the spring 125 is fixed to the upper mold 103, the lower end side of the spring 125 is in contact with the upper surface of the receiving portion 124, and the spring 125 biases the receiving portion 124 downward. More specifically, as shown in FIG. 3A, the spring 125 hits a step portion where the receiving portion 124 is an intermediate portion of the hole portion 103b with the upper mold 103 opened, and the first punch 121 is lowered most. It is energized to be in the position. Then, when the upper die 103 is lowered and the first punch 121 fits into the die 115 (when V-bending is performed), the first punch 121 is stopped. Further, when the upper mold 103 is lowered, the spring 125 is pressed and contracted by the reaction force from the receiving portion 124 ((d) in FIG. 3).

  The spring 125 is provided with a spring load detection sensor 150. The spring load detection sensor 150 is a load detection unit that detects the spring load of the spring 125, and outputs the detected spring load signal to a control unit (not shown) of the molding apparatus 100. The controller stops the operation of the press machine 102 (forming apparatus 100) when the detected spring load falls below a predetermined spring load (corresponding to the load shortage stop means in the present invention).

  A fixed position detection sensor 160 is provided at a portion corresponding to the first punch 121 of the die 115. The fixed position detection sensor 160 is a position detection unit that detects a position where the protrusion 121a fits into the recess, and outputs a detected position signal to a control unit (not shown) of the molding apparatus 100. The control unit is configured to stop the operation of the press machine 102 (forming apparatus 100) when the detected position signal does not reach the predetermined position (corresponding to the position shortage stop means in the present invention). ).

  The protrusion 122 a of the second punch 122 is formed so as to fit in the recess of the die 115 by forming a gap corresponding to the plate thickness of the strip plate material 10, similar to the protrusion 111 a of the pilot punch 111. Yes. The second punch 122 is directly fixed to the lower end side of the upper mold 103.

  And the lower end position of the 2nd punch 122, the 1st punch 121, and the pilot punch 111 is in the state (top dead center position) where the upper mold 103 is opened to the maximum, as shown in FIG. From the 101 side toward the restraining portion 110 side, the wave shape is sequentially positioned on the lower side by the depth of the wave shape (the length of each of the protrusions 111a, 121a, 122a). This is dealt with by adjusting the lengths of the shaft portions 123 and 112 with reference to the position of the second punch 122 fixed directly to the upper mold 103.

  The cut-bending portion 102B includes a cut-bending portion 130 and a forming portion 140, and is disposed on the side where the band plate material 10 is fed with respect to the V-bending portion 102A. The cutting and bending portion 130 is a mechanism portion that forms a cut portion for the offset portion 11b on the V-bending molded product 11a formed by the V-bending forming portion 102A, and a cutting and bending punch 131 fixed to the upper mold 103. And a die 132 fixed to the lower mold 104.

  The forming unit 140 is a mechanism unit that forms the final offset portion 11b by adjusting the shape of the cut portion formed by the cut and bent portion 130, and includes a forming punch 141 fixed to the upper mold 103, And a die 142 fixed to the mold 104.

  The molding apparatus 100 of this embodiment is configured as described above. Next, the operation of the molding apparatus 100 (the method for molding the inner fin 11) will be described with reference to FIG.

  The upper die 103 of the press machine 102 has a bottom dead center position that is closed with respect to the lower die 104 from a top dead center position (FIG. 3A) that is maximized with respect to the lower die 104. (Fig. 3 (d)). Accordingly, the punches 122, 121, 111, 131, 141 slide up and down.

  The material feeding unit 101 feeds the material corresponding to two wavy peaks of the inner fin 11 toward the press machine 102 while the upper mold 103 moves from the bottom dead center to the top dead center. Hereinafter, the material feeding portion 101 side of the strip plate material 10 is referred to as “material upstream side”, and the side to which the strip plate material 10 is fed is referred to as “material downstream side”.

  First, as shown in FIG. 3A, when the upper mold 103 is at the top dead center position, the lower end positions of the second punch 122, the first punch 121, and the pilot punch 111 are the urging forces of the springs 125 and 114, respectively. Thus, the wave-shaped depth (the length of each of the protrusions 111a, 121a, 122a) is positioned on the lower side in order from the second punch 122 side to the pilot punch 111 side.

  Subsequently, as shown in FIG. 3B, when the upper mold 103 is lowered from the top dead center position, the pilot punch 111 first fits into the concave portion of the die 115 and the wave formed on the band plate material 10 is obtained. The band plate 10 is fixed by sandwiching the shape between the upper mold 103 and the lower mold 104.

  Subsequently, as shown in FIG. 3C, when the upper die 103 is further lowered, the first punch 121 is fitted into the concave portion of the die 115. At this time, since the material feeding portion 101 is in a free state, as the first punch 121 is lowered, the strip plate material 10 is drawn from the material upstream side (arrow in FIG. 3C), and the strip plate material. A wave shape for one mountain is formed in 10.

  The spring 114 of the pilot punch 111 is pressed and contracted by the reaction force from the receiving portion 113 while the first punch 121 fits into the recess of the die 115, so that the pilot punch 111 is lower than the first punch 121. The difference in the dimension located on the side is absorbed in the upper mold 103, and the pilot punch 111 and the first punch 121 are both positioned in the recesses of the die 115.

  Subsequently, as shown in FIG. 3D, when the upper mold 103 is further lowered, the second punch 122 is fitted into the concave portion of the die 115. At this time, since the material feeding portion 101 is in a free state, as the second punch 122 is lowered, the band plate material 10 is drawn from the material upstream side (arrow in FIG. 3D), and the band plate material. Further, a wave shape corresponding to one mountain is formed in 10.

  Incidentally, while the second punch 122 fits into the recess of the die 115, the spring 114 of the pilot punch 111 and the spring 125 of the first punch 121 are pressed and contracted by the reaction force from the receiving portions 113 and 124. Differences in dimensions in which the punch 111 and the first punch 121 are located below the second punch 122 are absorbed in the upper mold 103, and the pilot punch 111, the first punch 121, and the second punch 122 are both It becomes a position where it fits into the recess of the die 115.

  During the lowering from the top dead center position to the bottom dead center position of the upper mold 103, the cutting and bending portion 102B on the downstream side of the material cuts into a wave shape by the lowering of the cutting and bending punch 131 and 141. Part and offset part 11b are formed.

  Then, by repeating the above, a wave shape is continuously formed in the longitudinal direction of the strip 10 in the V-bending portion 102A, and the inner fin 11 having the offset portion 11b is formed in the cut-bending portion 102B. .

  During the molding, when the spring load of the spring 125 obtained by the spring load detection sensor 150 falls below a predetermined spring load, the operation of the press machine 102 (molding apparatus 100) is stopped by a control unit (not shown). The Alternatively, the operation of the press machine 102 (forming apparatus 100) is stopped when the position where the protrusion 121a obtained by the fixed position detection sensor 160 has not reached the predetermined position.

  As described above, in the molding apparatus 100 according to the present embodiment, the band plate material 10 is restrained by the pilot punch 111 of the restraining portion 110 during one press of the press machine 102, and the first of the wave shape shaping portion 120. The punch 121 and the second punch 122 are fitted into the die 115 one by one in order toward the upstream side of the material, and the difference between the lower end positions of the punches 111 and 121 is absorbed by the springs 114 and 125. Therefore, it becomes possible to form a wave shape one by one while pulling material from the material feeding part 101 side, and it is possible to form a plurality of wave shapes with a single press without causing breakage of the strip plate material 10, thereby improving the processing capability. Can be made.

  Further, a spring load detection sensor 150 is provided on the spring 125, and a fixed position detection sensor 160 is provided on the die 115 corresponding to the first punch 121, so that the spring load of the spring 125 or the first punch 121 fits into the die 115. Since the operation of the press machine 102 is stopped according to the position, the spring 125 is insufficiently loaded due to a change over time in continuous use of the press machine 102, or the position where the first punch 121 is stuck is inappropriate. Even if this occurs, it is possible to prevent the wave shape from being formed while the spring load is insufficient or the fitting position is inappropriate, and it is possible to prevent the defective product from being formed continuously.

(Other embodiments)
In the first embodiment, it has been described that the corrugated part 120 is provided with two punches, that is, the first punch 121 and the second punch 122. However, a combination of three or more punches may be used. Furthermore, the processing capability of the inner fin 11 can be improved.

  Further, when the offset portion 11b is not provided in the inner fin 11, the press machine 102 can be configured to include only the V-bending portion 102A (the restraining portion 110 and the corrugated portion 120) (cut-bending portion 102B). Unnecessary).

  In addition, if the reliability of the spring 125 with respect to the number of presses is grasped in advance and maintenance of the spring 125 is performed in advance, the control using the spring load detection sensor 150 and the fixed position detection sensor 160 can be abolished. good.

It is a front view which shows the whole shaping apparatus of the corrugated board material in 1st Embodiment. (A) shows the state of a V-bending molded product, (b) is an external perspective view showing a completed inner fin. It is a front view which shows the action | operation state of a V bending molding part. It is the schematic which shows the mode of a fracture | rupture of the strip | belt board material in a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Strip | plate board material 100 Corrugated board | plate shaping | molding apparatus 101 Material feeding part 102 Press machine 103 Upper mold | type 104 Lower mold | type 110 Restraint part 111 Pilot punch (restraint punch)
114 Spring (spring member)
120 Waveform forming part 121 First punch (Waveform forming punch)
122 2nd punch (waveform forming punch, reference punch)
125 Spring (spring member)
150 Spring load detection sensor (load detection means)
160 Fixed position detection sensor (position detection means)

Claims (6)

Using a press machine (102), a method of forming a corrugated plate material that continuously forms a corrugated shape on a strip plate material (10) fed forward from a material feeding section (101),
During one press of the press machine (102),
A constraining step of constraining the corrugated side already formed on the strip material (10);
A corrugated plate material forming method comprising: a corrugated forming step of forming a plurality of corrugated shapes one by one from the side constrained in the constraining step toward the material feeding portion (101). An apparatus for forming a corrugated plate material that continuously forms a corrugated shape on a strip material (10) fed from a material feeding section (101) using a press machine (102),
During one press of the press machine (102),
A constraining portion (110) for constraining the corrugated side already formed on the strip material (10);
And a wave shape forming portion (120) for forming a plurality of the wave shapes one by one from the side restricted by the restriction portion (110) toward the material feeding portion (101) side. Corrugated plate forming equipment. The restraining portion (110) includes a restraining punch (111) disposed on the upper die (103) of the press machine (102) to restrain the corrugated side,
The corrugated part (120) is arranged in the upper mold (103) so as to be arranged in order toward the material feeding part (101) side of the restraining punch (111), and the corrugated part A plurality of corrugated punches (121, 122) for forming one mountain at a time,
The lower end position of each of the plurality of corrugated punches (121, 122) and the restraining punch (111) is in order from the material feeding part (101) side toward the restraining punch (111) side. It is located on the lower side by the depth of the shape,
Among the plurality of corrugated punches (121, 122), the other punches (111, 121) except the reference side punch (122) closest to the material feeding part (101) side are the same as those of the press machine (102). A difference from the lower end position of the reference side punch (122) after being fitted into the lower mold (104) is formed so as to be absorbed by the upper mold (103) side. 2. The apparatus for forming a corrugated plate material according to 2.   The corrugated plate forming apparatus according to claim 3, wherein the difference between the lower end position and the upper mold (103) is absorbed by a spring member (114, 125). Load detecting means (150) for detecting a spring load of the spring member (125) in the corrugated punch (121) excluding the reference side punch (122);
5. The load shortage stop means for stopping the operation of the press machine (102) when the spring load detected by the load detection means (150) falls below a predetermined load. Corrugated plate forming equipment. Position detecting means (160) for detecting a position where the corrugated punch (121) except the reference side punch (122) fits in the lower mold (104),
The position improper stop means for stopping the operation of the press machine (102) when the position to be fitted detected by the position detection means (160) does not reach a predetermined position is provided. The apparatus for forming a corrugated plate material according to claim 5.

Images