Perforated linear slit forming machine

Abstract

The present invention provides a perforated linear slit forming machine capable of forming a perforated linear slit that does not completely divide a plurality of molded articles. A perforated linear slit forming machine (40) is provided with: an upper rotating blade unit (41) having an upper rotating shaft (43) and an upper rotating blade (44) attached to the upper rotating shaft; a lower rotating blade part (42) having a lower rotating shaft (46) and a lower rotating blade (47) attached to the lower rotating shaft; a servomotor (45 (48)); and an operation control unit (200) in which at least one recess (44D (47D)) is disposed on the outer peripheral edge of at least one of the upper rotating blade and the lower rotating blade, and the servo motor is connected to the upper rotating shaft and the lower rotating shaft in which the recesses are disposed. The machine for forming a perforated linear slit forms a perforated linear slit (90) in a metal strip-shaped body by passing the metal strip-shaped body while sandwiching the metal strip-shaped body (81) in the plate thickness direction by means of an upper rotary blade and a lower rotary blade.

Description

Technical Field

[0001] The present invention relates to a perforated linear slit forming machine. Background Art

[0002] It is known that there is a slit device for forming a slit, and the slit is used to divide a continuous body formed by a plurality of products arranged in a horizontal manner into individual products, etc. As an example of such a slit device, there are structures disclosed in Patent Document 1 (Japanese Patent Publication No. 5-77195) and Patent Document 2 (Japanese Patent Publication No. 6811579).

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 5-77195 (Paragraphs 0002-0004, Figure 4 wait)

[0006] Patent Document 2: Japanese Patent No. 6811579 (Paragraphs 0083-0088, Figure 2 , Figure 3 , Figure 7 , Figure 8 wait) Summary of the invention

[0007] Problem that the invention aims to solve

[0008] The slit forming machines disclosed in Patent Documents 1 and 2 are both used to form continuous slits in the length and width directions of a molded product. Therefore, there are the following problems: after the molded product passes through the slit forming machine, the molded product that is singulated in the width direction, etc. needs to be processed, and the manufacturing equipment of the molded product becomes complicated.

[0009] Solutions for solving problems

[0010] Therefore, the present invention is made to solve the above-mentioned problems, and its object is as follows: That is, it is an object to provide a perforated linear slit forming machine that can form perforated linear slits without completely dividing a plurality of molded products.

[0011] In order to solve the above-mentioned problems, the inventors conducted in-depth research and came up with the following structure. That is, the present invention is a perforated linear slit forming machine, which is arranged on the conveying path of the metal strip to form perforated linear slits on the metal strip for easily dividing the metal strip formed into a predetermined shape by a stamping forming part into product widths, characterized in that the perforated linear slit forming machine comprises: an upper rotating knife section, which comprises: an upper rotating shaft, which extends along the width direction of the metal strip on the upper surface side of the metal strip; and an upper rotating knife, which is mounted on the upper rotating shaft and rotates together with the upper rotating shaft; a lower rotating knife section, which comprises: a lower rotating shaft, which extends along the width direction of the metal strip on the lower surface side of the metal strip; and a lower rotating knife, which is mounted on the lower rotating shaft and rotates together with the lower rotating shaft; a fixed The cam is connected to the upper and lower rotating shafts by the upper and lower rotating shafts, and the cam is connected to the lower and upper rotating shafts by the upper and lower rotating shafts by the lower rotating shafts, so that the cam is moved along the upper and lower rotating shafts and rotated in a direction opposite to the upper and lower rotating shafts respectively.

[0012] Thus, it is possible to form perforated linear slits that facilitate the division of the metal strip formed into a predetermined shape by the press forming unit into the product width without completely dividing a plurality of formed products.

[0013] In addition, it is preferred that the upper rotating shaft and the lower rotating shaft are arranged between a buffer section and a cutting machine, the buffer section is a buffer section of the metal strip arranged on the delivery side of the stamping forming section, and the cutting machine cuts the metal strip into a predetermined product length, and the motion control section controls the motion of the conveying device and the positioning control motor respectively so that the delivery length of the metal strip by the conveying device of the metal strip of the cutting machine is consistent with at least one of the rotation circumference of the upper rotating knife performed by the positioning control motor and the rotation circumference of the lower rotating knife performed by the positioning control motor.

[0014] Thereby, the metal strip of the length to be cut by the cutter can be supplied to the cutter in synchronization with the cutting operation of the cutter.

[0015] In addition, it is preferred that the recess is provided on the upper rotating knife as an upper recess, and the recess is provided on the lower rotating knife as a lower recess, and the motion control unit controls the motion of each of the positioning control motors connected to the upper rotating shaft and the lower rotating shaft according to the circumferential arrangement angle interval of the upper recess relative to the center point of the upper rotating knife and the circumferential arrangement angle interval of the lower recess relative to the center point of the lower rotating knife, so that the upper recess and the lower recess clamp the metal strip in the plate thickness direction in a formation order along the circumferential direction.

[0016] Thereby, the degree of freedom in the arrangement layout of the upper concave portion with respect to the upper rotating blade and the arrangement layout of the lower concave portion with respect to the lower rotating blade is improved.

[0017] In addition, it is preferred that a driving force transmission mechanism is respectively installed on the upper rotating shaft and the lower rotating shaft, the positioning control motor is connected to either the upper rotating shaft or the lower rotating shaft, the lower rotating shaft is driven by the upper rotating shaft with the aid of the driving force transmission mechanism, or the upper rotating shaft is driven by the lower rotating shaft with the aid of the driving force transmission mechanism.

[0018] This can improve the efficiency of forming the perforated linear slits and reduce the frequency of replacement of the upper rotary blade and the lower rotary blade due to wear.

[0019] In addition, it is preferable that the upper recessed portion and the lower recessed portion are positioned so that the upper rotary blade and the lower rotary blade sandwich the metal strip in a state where the upper recessed portion and the lower recessed portion face each other.

[0020] Thus, even a metal strip with a thicker plate thickness can reliably form a perforated linear slit. In addition, by making the upper concave portion relative to the lower concave portion, the influence of the meshing depth change between the upper rotary blade and the lower rotary blade can be reduced, and a stable perforated linear slit can be formed.

[0021] In addition, it is preferable that the upper recessed portion and the lower recessed portion are in a state where a part of the opening of the upper recessed portion faces a part of the opening of the lower recessed portion while being phase-shifted by a desired length in the circumferential direction.

[0022] Thereby, the length of the connection part of the perforated linear slits can be changed without changing the length dimension of the opening part.

[0023] In addition, it is preferred that the upper rotating shaft and the lower rotating shaft are arranged between a buffer portion of the metal strip arranged on the delivery side of the stamping forming portion and a cutting machine that cuts the metal strip into a predetermined product length, and the action control portion operates the positioning control motor to return the position of the recess relative to the metal strip to an initial position during the process of stopping the delivery of the metal strip by the conveying device of the cutting machine corresponding to the moment when the metal strip is cut into the product length by the cutting machine.

[0024] Thus, the position of the perforated line can be returned to the initial position for each cutting process without stopping the press forming section, so that the position of the perforated line can be always aligned.

[0025] Effects of the Invention

[0026] According to the configuration of the present invention, it is possible to form perforated linear slits that facilitate the division of a metal strip formed into a predetermined shape by a press die operated by a press forming unit into product widths without completely dividing a plurality of formed products. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic structural diagram of a heat exchange fin manufacturing apparatus having a perforated linear slit forming machine according to the present invention.

[0028] Figure 2 It is a top view of the heat exchange fins.

[0029] Figure 3 It is a top view showing a partial range of the metal strip.

[0030] Figure 4 It is a top view showing a partial range of a metal strip with perforated lines.

[0031] Figure 5 It is a top view of a partial range in the width direction of the product length metal strip.

[0032] Figure 6 This is a perspective view of the perforated linear slit forming machine according to the present embodiment, as viewed from the press forming portion side.

[0033] Figure 7 This is a perspective view of the perforated linear slit forming machine according to the present embodiment, as viewed from the cutting machine side.

[0034] Figure 8 It is a schematic structural diagram of the perforated linear slit forming machine of this embodiment.

[0035] Fig. 9 It is a side view of the upper rotating blade and the lower rotating blade in this embodiment.

[0036] Fig.10 This is an explanatory diagram showing a state in which the phase of the concave groove of the upper rotating blade and the phase of the concave groove of the lower rotating blade are deviated.

[0037] Fig.11 It is a side view of the upper rotating blade and the lower rotating blade in the first modified embodiment.

[0038] Fig.12 It is a schematic structural diagram of a perforated linear slit forming machine according to a first modified embodiment.

[0039] Fig.13 It is a side view of the upper rotating blade and the lower rotating blade in the second modified embodiment.

[0040] Fig.14 It is a side view of the upper rotating blade and the lower rotating blade in the third modified embodiment.

[0041] Fig.15 It is a side view of the upper rotating blade and the lower rotating blade in the fourth modified embodiment.

[0042] Fig.16 It is a side view of the upper rotating blade and the lower rotating blade in the fifth modified embodiment. DETAILED DESCRIPTION

[0043] In this embodiment, a heat exchange fin manufacturing apparatus 100 to which the present invention is applied will be described. Figure 1 As shown, the heat exchange fin manufacturing device 100 in this embodiment includes an uncoiler 10, a stamping unit 20, a buffer unit 30, a perforated linear slit forming machine 40, a cutter 50, a suction unit 60, a stacking unit 70, and an action control unit 200. In addition, the action control unit 200 is used to control the actions of the uncoiler 10, the stamping unit 20, the perforated linear slit forming machine 40, the cutter 50, and the suction unit 60, and can adopt a known structure having an action control program stored in a storage unit not shown and a computing unit represented by a CPU that operates based on the action control program.

[0044] The uncoiler 10 is used to unwind the aluminum plate 80, which is the material of the heat exchange fin 88, from the coil 11 wound on a reel not shown in the figure, and a known structure can be adopted. The stamping forming section 20 has an oil supply section 21, a stamping die 22, a stamping mechanism 23, and an intermittent feeding mechanism 24. The aluminum plate 80 coated with processing oil by the oil supply section 21 is processed into a metal strip 81 of a predetermined shape by the stamping die 22, and the stamping die 22 is abutted and separated by the stamping mechanism 23. The metal strip 81 is intermittently sent out from the stamping forming section 20 by the intermittent feeding mechanism 24 in synchronization with the action of the stamping mechanism 23. The buffer section 30 in this embodiment is a space that makes the metal strip 81 sent out from the stamping forming section 20 become a state of relaxation downward, and buffers the difference between the forming length and the cutting length each time based on the stamping forming section 20 and the cutting machine 50 described later. The buffer portion 30 may be constituted by a guide member or the like that causes the metal strip 81 to have a predetermined slack shape.

[0045] The perforated linear slit forming machine 40 forms a perforated linear slit 90 for easily dividing the metal strip 81 into product widths. The metal strip 81 is formed to have a plurality of rows of perforated linear slits in the width direction (a direction orthogonal to the feeding direction in the same plane). Figure 2 The final product shown is a long strip of fins 88 for heat exchange. Figure 3 1 is a top view showing a portion of the metal strip 81 in the longitudinal direction. At least one perforated linear slit 90 is formed in the metal strip 81 in the product width direction, and the cutting line 91 as the cutting part and the connecting part 92 as the non-cutting part are formed at a desired interval in the product length direction. The metal strip 82 with perforated linear slits 90 formed by the perforated linear slit forming machine 40 (see FIG. 1 ) Figure 4 ) is intermittently conveyed by the conveying device 51 provided in the cutting machine 50 in accordance with the length of the product, and is held by the adsorption surface 61 of the suction unit 60 provided on the downstream side of the cutting machine 50. At this time, the length of the metal strip 82 with perforated lines extending from the cutting blade 52 of the cutting machine 50 is equal to the length of the product.

[0046] In this way, the metal strip 82 with perforated lines is cut into product length by the cutting blade 52 in a state where the product length portion on the front end side is adsorbed by the adsorption surface 61. Figure 5As shown, the product length metal strip 83 cut into product length by the cutting machine 50 is in a state where a plurality of heat exchange fins 88 are connected by the connecting portion 92 in the product width direction. The stacking section 70 having the stacking table 72 is arranged at the lower side position of the adsorption surface 61 of the suction section 60. The stacking pin 71 is erected on the stacking table 72 so as to be aligned with the position of the through hole 89 for inserting the tube formed in the product length metal strip 83 in the state of being adsorbed and held by the adsorption surface 61. When the operation control section 200 temporarily stops the suction device (not shown) of the suction section 60, the product length metal strip 83 falls from the adsorption surface 61 and is stacked on the stacking table 72 in the plate thickness direction with the stacking pin 71 passing through the through hole 89. When the preset number of product length metal strips 83 are stacked in the stacking section 70, the stacking section 70 is conveyed to the next process by the operator or the like. In addition, the stacking section 70 in the empty state is arranged in a state of being aligned with the suction section 60, and the above operation is repeated.

[0047] Next, the perforated linear slit forming machine 40 of the present invention will be described in detail. Figure 1 , Figure 6 to Figure 8 As shown, the perforated linear slit forming machine 40 of the present embodiment is arranged on the conveying path of the metal strip 81 along the width direction of the metal strip 81. The perforated linear slit forming machine 40 includes an upper rotating blade 41 arranged on the upper side of the metal strip 81 and a lower rotating blade 42 arranged on the lower side of the metal strip 81. The boundary portion between the upper rotating blade 41 and the lower rotating blade 42 is aligned with the height position of the conveying path of the metal strip 81. The operation of the upper rotating blade 41 and the lower rotating blade 42 is controlled by the operation control unit 200.

[0048] The upper rotating blade portion 41 includes: an upper rotating shaft 43, which is extended in the width direction of the metal strip 81; an upper rotating blade 44, which is arranged at predetermined intervals in the length direction of the upper rotating shaft 43; and an upper servo motor 45 as a positioning control motor, which rotates the upper rotating shaft 43. In addition, a servo motor is used as the positioning control motor here, but the positioning control motor is not limited to a servo motor, and a stepping motor can also be used. The upper rotating blade 44 in this embodiment has an upper circular plate blade 44B formed into a large diameter larger than the outer diameter of the upper retaining body 44A fixed to a short cylindrical upper retaining body 44A. A first through hole 44C is formed in the radial center portion of the upper circular plate blade 44B. As shown Fig. 9 As shown, a plurality of upper recesses 44D are formed on the outer peripheral edge of the upper disk blade 44B along the circumferential direction and recessed radially inward. The number of upper recesses 44D is set to be the same as the spacing of the connection portions 92 in the perforated linear slits 90.

[0049] In addition, the length dimension W1 of the opening of the upper concave portion 44D (equivalent to the required circumferential length range at the outer peripheral edge of the upper circular blade 44B) corresponds to the length dimension of the connecting portion 92 of the perforated linear slit 90, and is therefore set according to the shape of the perforated linear slit 90 (the length of the connecting portion 92). The upper rotating blade 44 is made to pass the upper rotating shaft 43 through the first through hole 44C, so that a plurality of upper rotating blades 44 are maintained in a continuous state along the length direction of the upper rotating shaft 43, and the upper fixing portion 44E is fixed to the upper rotating shaft 43 at both ends in the continuous direction of the plurality of upper rotating blades 44. At this time, each upper rotating blade 44 is fixed in a state in which the circumferential arrangement position of each upper concave portion 44D is completely aligned in the length direction of the upper rotating shaft 43.

[0050] The lower rotating blade portion 42 includes: a lower rotating shaft 46 extending in the width direction of the metal strip 81; a lower rotating blade 47 arranged at predetermined intervals in the length direction of the lower rotating shaft 46; and a lower servo motor 48 as a positioning control motor that rotates the lower rotating shaft 46. The lower rotating blade 47 in this embodiment has a lower circular plate blade 47B having a large diameter larger than the outer diameter of the lower retaining body 47A fixed to a short cylindrical lower retaining body 47A. A second through hole 47C is formed in the radial center portion of the lower circular plate blade 47B. As shown in FIG. Fig. 9 As shown, the lower disk blade 47B is formed with a plurality of lower recesses 47D that are recessed inward in the radial direction along the circumferential direction at the outer peripheral edge position. The number of lower recesses 47D is set in a manner that the spacing between the connecting portions 92 in the perforated linear slits 90 is the same as that of the lower recesses 47D. That is, the lower recesses 47D are arranged at the same circumferential intervals as the upper recesses 44D.

[0051] In addition, the length dimension W1 of the opening of the lower concave portion 47D (equivalent to the required circumferential length range at the outer peripheral edge of the lower circular blade 47B) corresponds to the length dimension of the connecting portion 92 of the perforated linear slit 90, and is therefore set according to the shape of the perforated linear slit 90. The lower rotating blade 47 is made to pass the lower rotating shaft 46 through the second through hole 47C, so that a plurality of lower rotating blades 47 are held in a continuous state along the length direction of the lower rotating shaft 46, and the lower fixing portion 47E is fixed to the lower rotating shaft 46 at both ends in the continuous direction of the plurality of lower rotating blades 47. At this time, the lower rotating blades 47 are fixed in a state in which the circumferential arrangement positions of the respective lower concave portions 47D are all aligned in the length direction of the lower rotating shaft 46.

[0052] like Fig. 9As shown, the upper rotating blade portion 41 and the lower rotating blade portion 42 are formed in a manner that is symmetrical in the upper and lower directions with the metal strip 81 as a symmetry line. The upper rotating blade portion 41 and the lower rotating blade portion 42 make the phase of the upper concave portion 44D of the upper rotating blade 44 coincide with the phase of the lower concave portion 47D of the lower rotating blade 47. Thus, if the upper rotating blade portion 41 and the lower rotating blade portion 42 rotate with the same rotation circumference, the upper concave portion 44D and the lower concave portion 47D are opposite to each other at the same position in the length direction of the metal strip 81, thereby forming a connecting portion 92 composed of non-cutting portions at a predetermined interval in the length direction of the metal strip 81.

[0053] In the perforated linear slit forming machine 40 of the present embodiment, an oil supply line 49 is provided on the upper side portion of the upper rotating blade 41 in parallel with the upper rotating blade 41 (see Figure 6 ). An oil supply nozzle 49A is provided on the oil supply line 49 in a state aligned with the plane position of each upper circular plate blade 44B. The supply side end of the oil supply line 49 is connected to a processing oil tank (not shown), and the processing oil stored in the processing oil tank is supplied to the oil supply line 49 by an oil supply pump (not shown). The processing oil supplied from the oil supply nozzle 49A is recovered to a recovery tank (not shown) through a discharge path. The operation of the oil supply pump is controlled by the operation control unit 200 to adjust the oil supply amount from the oil supply nozzle 49A.

[0054] Next, the processing of the metal strip 81 by the perforated line slit forming machine 40 will be described in more detail. The metal strip 81 formed into a predetermined shape by the press forming unit 20 is fed to the perforated line slit forming machine 40 via the buffer unit 30 (a space for relaxing the metal strip 81 in a downwardly convex shape) through the intermittent feeding mechanism 24 of the press forming unit 20 and the conveying device 51 of the cutting machine 50. In addition, the feeding amount of the metal strip 81 by the intermittent feeding mechanism 24 is different from the conveying length of the metal strip 82 with perforated lines by the conveying device 51, but the difference between the feeding amount of the intermittent feeding mechanism 24 and the conveying length of the conveying device 51 can be absorbed by the change in the relaxed shape of the metal strip 81 in the buffer unit 30.

[0055] The metal strip 81 supplied to the perforated linear slit forming machine 40 as described above is fed out in a state of being clamped in the plate thickness direction by the upper rotating blade 41 and the lower rotating blade 42, thereby forming the perforated linear slit 90 by the upper rotating blade 44 and the lower rotating blade 47. Processing oil is supplied from the oil supply nozzle 49A from the upper position of the upper rotating blade 44, so that the stress applied to the metal strip 81 during processing can be reduced, and the wear of the upper rotating blade 44 and the lower rotating blade 47 can be prevented. The upper rotating blade 41 and the lower rotating blade 42 of this embodiment are rotationally driven by the upper servo motor 45 and the lower servo motor 48 in a mutually independent state.

[0056] In the present embodiment, the motion control unit 200 controls the respective motions in such a manner that the length of the metal strip 82 with perforations that is delivered by the conveyor 51 of the cutter 50 is consistent with the rotation circumference of the upper rotating blade 44 by the upper servo motor 45 and the rotation circumference of the lower rotating blade 47 by the lower servo motor 48. By adopting such a manner, the stress generated when the metal strip 81 and the metal strip 82 with perforations are conveyed is reduced, and further, the heat exchange fin 88 with high dimensional accuracy can be provided.

[0057] In this way, the metal strip 81 is formed into a perforated metal strip 82 having at least one perforated linear slit 90 formed in the width direction of the metal strip 81 by the perforated linear slit forming machine 40 and is fed to the cutting machine 50 .

[0058] In addition, in the present embodiment, the upper rotating blade portion 41 and the lower rotating blade portion 42 are set so that the phases of the upper concave portion 44D of the upper rotating blade 44 and the lower concave portion 47D of the lower rotating blade 47 are completely consistent (the ends of the openings of each other are consistent with each other), but this method is not limited. Fig.10 As shown, it is also possible to adopt a method of shifting the phases in the circumferential direction within the length range of the openings of the upper recess 44D and the lower recess 47D in the circumferential direction. As a result, the circumferential length of the overlapping portion of the upper recess 44D and the lower recess 47D in the circumferential direction becomes W2, forming a connecting portion 92 that is shorter than the length W1 of the connecting portion 92 formed when the upper recess 44D and the lower recess 47D rotate in the same phase. According to this method, the length of the connecting portion 92 in the perforated linear slit 90 can be adjusted without changing the circumferential length dimension W1 of the upper recess 44D and the lower recess 47D.

[0059] However, during the period when the cutting machine 50 is cutting the metal strip 82 with perforated lines, at least the conveying of the metal strip 81 in the conveyor 51 of the cutting machine 50 is stopped. During this period, the metal strip 81 sent out from the press forming unit 20 is bent at the buffer unit 30, so that the supply of the metal strip 81 to the perforated line slit forming machine 40 is temporarily stopped. The operation control unit 200 can also execute the process of driving the upper servo motor 45 and the lower servo motor 48 during the period when the conveying of the metal strip 81 in the conveyor 51 of the cutting machine 50 is stopped (in the process of stopping the introduction of the metal strip 81 by the conveyor 51 of the cutting machine 50 according to the timing of cutting the metal strip 82 with perforated lines into the product length). Thus, the relative position of the upper recess 44D and the lower recess 47D can be restored to the initial position, and the positions of the cutting line 91 and the connecting part 92 of the perforated linear slit 90 formed in the metal strip 82 with perforated lines and the product length metal strip 83 are always aligned in the product length direction.

[0060] As described above, according to the structure of the perforated linear slit forming machine 40 of the present embodiment, it is possible to form uniform perforated linear slits 90 along the product length direction of the metal strip 81. In addition, the number of connecting portions 92 arranged per unit length of the perforated linear slits 90 can be easily changed by changing the number of upper recesses 44D of the upper rotating blade 44 and the number of lower recesses 47D of the lower rotating blade 47. Furthermore, the length of the connecting portion 92 can be changed by simply changing the overlapping length of the upper recesses 44D and the lower recesses 47D in the circumferential direction. In addition, each time the perforated metal strip 82 is cut into product lengths, the upper recesses 44D and the lower recesses 47D are reset to the initial setting state, so that the positions of the cutting line 91 and the connecting portion 92 in each perforated linear slit 90 formed in the product length metal strip 83 can be set to always be aligned.

[0061] In the above embodiment, an example is given of a method in which the oil supply line 49 and the oil supply nozzle 49A are arranged on the upper side of the upper rotating blade 41 in parallel with the upper rotating blade 41. The arrangement positions of the oil supply line 49 and the oil supply nozzle 49A are not limited to the positions shown in the present embodiment, and they can also be arranged at positions around the abutment portions of the metal strip 81, the upper rotating blade 41, and the lower rotating blade 42. In addition, a method in which the oil supply line 49 and the oil supply nozzle 49A are omitted can also be selected.

[0062] In the above embodiment, the upper circular blade 44B of the upper rotating blade 44 is provided with the upper concave portion 44D, and the lower circular blade 47B of the lower rotating blade 47 is provided with the lower concave portion 47D, but the present invention is not limited to this embodiment. Fig.11 As shown, the following first variant embodiment can also be adopted: a simple circular blade is adopted in which the upper circular blade 44B of the upper rotating blade 44 is provided with the upper concave portion 44D, but the lower circular blade 47B of the lower rotating blade 47 is not provided with the lower concave portion 47D. Hereinafter, only the characteristic structures in each variant embodiment will be described, and other structures not described are the same as the above described embodiments.

[0063] In the perforated linear slit forming machine 40 of the first variant embodiment, only the upper servo motor 45 is provided as a positioning control motor on the upper rotating blade 41. A structure can be adopted in which the lower rotating blade 42 having a simple circular blade applied to the lower circular blade 47B is driven by the rotation of the upper rotating shaft 43 of the upper rotating blade 41. Specifically, the following method is adopted: Fig.12 As shown, the upper gear G1 and the lower gear G2 as the driving force transmission mechanism are mounted on the upper rotating shaft 43 and the lower rotating shaft 46 so that the lower gear G2 meshes with the upper gear G1. Fig.12 The perforated linear slit forming machine 40 shown in the figure has the upper gear G1 and the lower gear G2 directly meshed with each other, but it is also possible to adopt a configuration in which the upper gear G1 and the lower gear G2 are indirectly meshed with each other via a belt, a chain, or the like.

[0064] In addition, in the first modified embodiment, the following method is illustrated: the lower rotating blade 42 is driven by the upper rotating blade 41 as the drive shaft by meshing the upper gear G1 and the lower gear G2 as the driving force transmission mechanism, but it is not limited to this method. It is also possible to adopt a method in which the lower rotating blade 42 is rotated relative to the upper rotating blade 41 as the drive shaft by friction between the lower rotating blade 42 and the metal strip 81.

[0065] In addition, if Fig.13As shown, the following second variant embodiment can also be adopted: the diameter size R1 of the upper rotating blade 44 is different from the diameter size R2 of the lower rotating blade 47, and the upper side recessed portion 44D formed on the upper side circular plate blade 44B of the upper rotating blade 44 is arranged at an angle interval α degrees relative to the center point O1 of the upper rotating blade 44 and the lower side recessed portion 47D formed on the lower side circular plate blade 47B of the lower rotating blade 47 is arranged at an angle interval β degrees relative to the center point O2 of the lower rotating blade 47. Among them, only the characteristic structure in the second variant embodiment is described, and other structures that are not described are the same as the above-described embodiment. The action control unit 200 in the second variant embodiment controls the actions of the upper servo motor 45 and the lower servo motor 48 respectively, so that the rotation angle of the upper rotating shaft 43 of the upper rotating blade portion 41 and the rotation angle of the lower rotating shaft 46 of the lower rotating blade portion 42 become α degrees.

[0066] In addition, in the second modified embodiment, the diameter size R1 of the upper rotating blade 44 and the diameter size R2 of the lower rotating blade 47 are different from the beginning, but it is not limited to this mode. When the wear of the upper circular blade 44B of the upper rotating blade 44 and the lower circular blade 47B of the lower rotating blade 47 is different due to use and grinding, the second modified embodiment can also be appropriately applied.

[0067] In addition, if Fig.14 As shown, the following third variant embodiment can also be adopted: the diameter size R1 of the upper rotating blade 44 is equal to the diameter size R2 of the lower rotating blade 47, and the upper side recessed portion 44D formed on the upper side circular plate blade 44B of the upper rotating blade 44 is arranged at an angle interval α degrees relative to the center point O1 of the upper rotating blade 44, and the lower side recessed portion 47D formed on the lower side circular plate blade 47B of the lower rotating blade 47 is arranged at an angle interval β degrees relative to the center point O2 of the lower rotating blade 47. Among them, only the characteristic structure in the third variant embodiment is described, and other structures that are not described are the same as the above-described embodiment. The action control unit 200 in the third variant embodiment controls the actions of the upper servo motor 45 and the lower servo motor 48 respectively, so that the ratio of the rotation angle of the upper rotating shaft 43 of the upper rotating blade portion 41 and the rotation angle of the lower rotating shaft 46 of the lower rotating blade portion 42 becomes β:α.

[0068] In addition, if Fig.15As shown, the following fourth variant embodiment can also be adopted: the diameter size R1 of the upper rotating blade 44 is different from the diameter size R2 of the lower rotating blade 47, and the upper side recess 44D formed on the upper side circular plate blade 44B of the upper rotating blade 44 is arranged at an angle interval α degrees relative to the center point O1 of the upper rotating blade 44 and the lower side recess 47D formed on the lower side circular plate blade 47B of the lower rotating blade 47 is arranged at an angle interval β degrees relative to the center point O2 of the lower rotating blade 47. Among them, only the characteristic structure in the fourth variant embodiment is described, and other structures that are not described are the same as the above-described embodiments. The action control unit 200 in the fourth variant embodiment controls the actions of the upper servo motor 45 and the lower servo motor 48 respectively, so that the ratio of the rotation angle of the upper rotating shaft 43 of the upper rotating blade part 41 and the rotation angle of the lower rotating shaft 46 of the lower rotating blade part 42 becomes β:α.

[0069] In addition, if Fig.16 As shown, the following fifth modified embodiment can also be adopted: the diameter size R1 of the upper rotating blade 44 is different from the diameter size R2 of the lower rotating blade 47, and the arrangement angle interval α degrees of the upper concave portion 44D formed on the upper circular plate blade 44B of the upper rotating blade 44 relative to the center point O1 of the upper rotating blade 44 is different from the arrangement angle interval β degrees of the lower concave portion 47D formed on the lower circular plate blade 47B of the lower rotating blade 47 relative to the center point O2 of the lower rotating blade 47, but the arrangement circumference interval L1 of the upper concave portion 44D formed on the upper rotating blade 44 is equal to the arrangement circumference interval L2 of the lower concave portion 47D formed on the lower rotating blade 47. Among them, only the characteristic structure of the fifth modified embodiment is described, and other structures not described are the same as the above-described embodiment. The operation control unit 200 in the fifth modified embodiment controls the operations of the upper servomotor 45 and the lower servomotor 48 so that the rotation circumference of the upper rotary blade 44 and the rotation circumference of the lower rotary blade 47 become equal.

[0070] Specifically, the following method can be illustrated: the motion control unit 200 controls the action of the upper servo motor 45 and the lower servo motor 48 based on the diameter size R1 of the upper rotating knife 44 and the circumferential arrangement angle interval α degrees of the upper recess 44D relative to the center point O1 of the upper rotating knife 44, and the diameter size R2 of the lower rotating knife 47 and the circumferential arrangement angle interval β degrees of the lower recess 47D relative to the center point O2 of the lower rotating knife 47, so that the rotation circumference of the upper rotating knife 44 per unit time (here is the length of the arrangement circumference interval L1) is equal to the rotation circumference of the lower rotating knife 47 (here is the length of the arrangement circumference interval L2).

[0071] In addition, in the above-described embodiment and modified embodiment, a method can also be adopted in which a circular plate blade diameter dimension measuring component (not shown) is additionally provided to measure the diameter dimension R1 of the upper circular plate blade 44B and the diameter dimension R2 of the lower circular plate blade 47B at a preset predetermined operation time interval. In this method, the operation control unit 200 can also control the operation of the upper servo motor 45 and the lower servo motor 48 based on the measurement value measured by the circular plate blade diameter dimension measuring component, the preset (pre-input by the input component) arrangement angle interval α of the upper concave portion 44D, and the arrangement angle interval β of the lower concave portion 47D. According to this embodiment, the upper concave portion 44D and the lower concave portion 47D can be used to clamp the metal strip 81 in the plate thickness direction in the order of formation of the upper concave portion 44D and the lower concave portion 47D along the circumferential direction of the upper rotating blade 44 (upper circular blade 44B) and the lower rotating blade 47 (lower circular blade 47B) so that the upper concave portion 44D and the lower concave portion 47D face each other. When the motion control unit 200 controls the motion of the upper servo motor 45 and the lower servo motor 48, it can be based on the rotation angle of the upper rotating shaft 43 and the lower rotating shaft 46 or the rotation circumference of the upper rotating blade 44 (upper circular blade 44B) and the lower rotating blade 47 (lower circular blade 47B).

[0072] Furthermore, the perforated linear slit forming machine 40 of the above embodiment is exemplified as being disposed between the buffer section 30 and the cutter 50 in the conveying direction of the metal strip 81 of the heat exchange fin manufacturing apparatus 100, but the present invention is not limited to this embodiment. The perforated linear slit forming machine 40 may be disposed upstream of the cutter 50 in the conveying direction of the metal strip 81.

[0073] Furthermore, in addition to the modification examples described above, a mode in which the modification examples described in the embodiment are appropriately combined may be adopted.

Claims

1. A perforated linear slit forming machine, which is arranged on a conveying path of a metal strip, to form perforated linear slits on the metal strip for easily dividing the metal strip formed into a predetermined shape by a stamping forming unit into product widths, characterized in that: The perforated linear slit forming machine comprises: The upper rotating blade part comprises: an upper rotating shaft extending along the width direction of the metal strip on the upper surface side of the metal strip; and an upper rotating blade mounted on the upper rotating shaft and rotating together with the upper rotating shaft; The lower rotating blade part comprises: a lower rotating shaft extending along the width direction of the metal strip at the lower surface side of the metal strip; and a lower rotating blade mounted on the lower rotating shaft and rotating together with the lower rotating shaft; a positioning control motor connected to at least one of the upper rotating shaft and the lower rotating shaft; and an action control unit, which controls the action of the positioning control motor, At least one of the upper rotating blade and the lower rotating blade is provided with at least one recessed portion recessed radially inward within a required circumferential length range of the outer peripheral edge. The positioning control motor is connected to the upper rotating shaft on which the upper rotating blade having the recessed portion is mounted and the lower rotating shaft on which the lower rotating blade having the recessed portion is mounted. The perforated linear slit forming machine forms the perforated linear slits on the metal strip by passing the metal strip between the upper rotary blade and the lower rotary blade while clamping the metal strip in the plate thickness direction.

2. The perforated linear slit forming machine according to claim 1, characterized in that: The upper rotating shaft and the lower rotating shaft are arranged between a buffer portion, which is a buffer portion of the metal strip arranged on the delivery side of the stamping forming portion, and a cutter, which cuts the metal strip into a predetermined product length. The motion control unit controls the motion of the conveying device and the positioning control motor respectively so that the length of the metal strip sent out by the conveying device of the metal strip of the cutting machine is consistent with at least one of the rotation circumference of the upper rotating knife performed by the positioning control motor and the rotation circumference of the lower rotating knife performed by the positioning control motor.

3. The perforated linear slit forming machine according to claim 1, characterized in that: The upper rotating blade is provided with the recessed portion as an upper recessed portion, and the lower rotating blade is provided with the recessed portion as a lower recessed portion. The motion control unit controls the motion of each positioning control motor connected to the upper rotating shaft and the lower rotating shaft according to the circumferential arrangement angle interval of the upper recess relative to the center point of the upper rotating knife and the circumferential arrangement angle interval of the lower recess relative to the center point of the lower rotating knife, so that the upper recess and the lower recess clamp the metal strip in the plate thickness direction in the formation order along the circumferential direction.

4. The perforated linear slit forming machine according to claim 1 or 2, characterized in that: A driving force transmission mechanism is installed on the upper rotating shaft and the lower rotating shaft respectively. The positioning control motor is connected to any one of the upper rotating shaft and the lower rotating shaft. The lower rotating shaft is driven by the upper rotating shaft via the driving force transmission mechanism, or the upper rotating shaft is driven by the lower rotating shaft via the driving force transmission mechanism.

5. The perforated linear slit forming machine according to claim 3, characterized in that: The upper concave portion and the lower concave portion are positioned so that the upper rotary blade and the lower rotary blade sandwich the metal strip in a state where the upper concave portion faces the lower concave portion.

6. The perforated linear slit forming machine according to claim 3, characterized in that: The upper recessed portion and the lower recessed portion are in a state where a part of an opening of the upper recessed portion faces a part of an opening of the lower recessed portion while being phase-shifted by a desired length in the circumferential direction.

7. The perforated linear slit forming machine according to claim 3, characterized in that: The upper rotating shaft and the lower rotating shaft are arranged between a buffer portion, which is a buffer portion of the metal strip arranged on the delivery side of the stamping forming portion, and a cutter, which cuts the metal strip into a predetermined product length. The motion control unit operates the positioning control motor to return the position of the recess relative to the metal strip to an initial position during the process in which the conveying device of the cutting machine stops feeding the metal strip corresponding to the moment when the metal strip is cut into the product length by the cutting machine.

8. The perforated linear slit forming machine according to claim 4, characterized in that: The upper rotating shaft and the lower rotating shaft are arranged between a buffer portion, which is a buffer portion of the metal strip arranged on the delivery side of the stamping forming portion, and a cutter, which cuts the metal strip into a predetermined product length. The motion control unit operates the positioning control motor to return the position of the recess relative to the metal strip to an initial position during the process in which the conveying device of the cutting machine stops feeding the metal strip corresponding to the moment when the metal strip is cut into the product length by the cutting machine.

9. The perforated linear slit forming machine according to claim 5, characterized in that: The upper rotating shaft and the lower rotating shaft are arranged between a buffer portion, which is a buffer portion of the metal strip arranged on the delivery side of the stamping forming portion, and a cutter, which cuts the metal strip into a predetermined product length. The motion control unit operates the positioning control motor to return the position of the recess relative to the metal strip to an initial position during the process in which the conveying device of the cutting machine stops feeding the metal strip corresponding to the moment when the metal strip is cut into the product length by the cutting machine.

10. The perforated linear slit forming machine according to claim 6, characterized in that: The upper rotating shaft and the lower rotating shaft are arranged between a buffer portion, which is a buffer portion of the metal strip arranged on the delivery side of the stamping forming portion, and a cutter, which cuts the metal strip into a predetermined product length. The motion control unit operates the positioning control motor to return the position of the recess relative to the metal strip to an initial position during the process in which the conveying device of the cutting machine stops feeding the metal strip corresponding to the moment when the metal strip is cut into the product length by the cutting machine.

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