JP2008100294A - Cutting method and device for corrugated fin - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide cutting method and device for a corrugated fin preventing generation of buckling by interference of a guiding guide with a crest part of a fin material without equipping positioning equipment of the fin material in the vicinity of a cutting part to simplify equipment in the cutting part, to attain high product accuracy of the corrugated fin and to improve yield. <P>SOLUTION: In this cutting method, the fin material 1 machined in a corrugated form is continuously transferred, a movable blade 43 for cutting is inserted into a trough part 12 along the guide 41 in an inserted and positioned state of the guide 41 in the trough part 12 of the fin material 1 during the transfer, and a bottom part of the trough part 12 is cut between the movable blade 43 and a fixed blade 42. A roller 41b provided at a distal end of the guide 41 is rotated, and thereby the guide 41 is smoothly inserted into the trough part 12 of the fin material 1. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a corrugated fin cutting method and a corrugated fin cutting device.

Conventionally, as a corrugated fin cutting device, a pair of counting worms that respectively engage with both shoulder portions of a corrugated fin material and continuously transfer the fin material in the transfer direction, and a fin material engaged with the both counting worms Guide guide that moves in the transfer direction in synchronization with the fin material, and moves in the transfer direction of the fin material together with the guide guide, and when the guide guide passes both counting worms, the guide guide guides The thing of the structure provided with the up-and-down movable blade and fixed blade which cut | disconnect the trough part of the made fin material is known (for example, refer patent document 1).
Japanese Patent Laid-Open No. 2004-223585

  However, since the corrugated fin cutting device of the conventional example inserts the guide guide into the valley portion of the fin material positioned by the pair of counting worms, the cutting portion is cut by the upper and lower movable blades and the fixed blade. There is a problem that the equipment becomes complicated.

  Therefore, if the guide guide is inserted into the valley of the fin material without positioning the fin material in the vicinity of the cut portion, the equipment of the cut portion can be simplified, but if this is done, the guide guide contacts the peak portion of the fin material. Since there is a risk of buckling due to contact, there is a problem of deteriorating product accuracy and yield.

  The problem to be solved by the present invention can prevent the guide guide from interfering with the peak portion of the fin material and causing buckling without providing the fin material positioning equipment in the vicinity of the cutting portion, Thereby, while being able to simplify the installation in a cutting part, it is providing the corrugated fin cutting method and corrugated fin cutting device which can aim at the improvement of the high product precision and yield of a corrugated fin.

  In order to solve the above-mentioned problem, the corrugated fin cutting method according to claim 1, wherein the corrugated fin material is transferred continuously or intermittently and guided into the valley of the fin material during the transfer or intermittent stop. With the corrugated fin cutting method in which the movable blade for cutting is inserted into the valley portion along the guide guide and the bottom portion of the valley portion is cut between the guide blade and the fixed blade in the state where the guide is inserted and positioned. The roller provided at the tip of the guide guide is rotated so as to spread the valley of the fin material while rotating, so that the guide guide is smoothly inserted into the valley of the fin material. It was a means to do.

  The corrugated fin cutting device according to claim 2, wherein the corrugated fin cutting device continuously transfers the corrugated fin material, and inserts and positions the guide guide into the valley portion of the fin material being transferred. A corrugated fin cutting device in which a movable cutting blade is inserted into the valley along the bottom and the bottom of the valley is cut between the fixed blade and the corrugated fin cutting device. A rotating roller that rotates while expanding the valley is provided.

  According to the corrugated fin cutting method and corrugated fin cutting device of the present invention, when the guide guide is inserted into the valley portion of the fin material, even if the roller provided at the tip of the guide guide contacts the peak portion of the fin material, The guides are smoothly inserted into the valleys of the fin material by expanding the valleys of the fin material while the roller rotates.

  Therefore, it is possible to prevent the guide guide from interfering with the ridges of the fin material and causing buckling without providing the fin material positioning equipment in the vicinity of the cut part. In addition to being able to simplify, it is possible to obtain an effect that the high product accuracy and yield of the corrugated fin can be improved.

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

  The corrugated fin cutting device according to the first embodiment corresponds to the invention described in claims 1 to 6.

  First, the corrugated fin cutting device according to the first embodiment will be described with reference to the drawings.

  1 is an overall plan view showing a corrugated fin cutting device of the first embodiment, FIG. 2 is a side view thereof, FIG. 3 is an enlarged front view seen from the direction of arrow A in FIG. 1, and FIG. FIGS. 5 and 5 are perspective views showing the fin material, FIG. 6A is the cam shape of the guide guide drive cam, FIG. 5B is the cam curve of the guide guide drive cam, and FIG. 5C is the movable blade drive cam. 7 is a front view showing a movable blade, FIG. 8 is a bottom view thereof, FIG. 9 is a longitudinal sectional view taken along line BB in FIG. 9, and FIG. 10 is a transverse sectional view taken along line CC in FIG. 11 is a process diagram showing the operation of the corrugated fin cutting device of Example 1. FIG.

  The corrugated fin cutting device includes a corrugated fin material 1, a transfer table 2, a transfer device 3, and a cutting device 4.

  The corrugated fin material 1 has a large number of peaks 11 and valleys 12 as shown in FIG. 5 by feeding the fin material between a pair of gear-shaped forming rollers from a roll wound with a thin fin material. Are processed into a continuous wave. And this fin material 1 is correct | amended by the mountain shape which the center part of each ridgeline part 11a protrudes in the direction opposite to the sending-out direction of the fin material 1. FIG. A large number of louvers 13 for promoting heat exchange efficiency are formed on the side walls other than the peaks 11 and valleys 12 except for the central portion and both ends in the width direction.

  As shown in FIGS. 1 and 2, the moving device 3 continuously transfers the corrugated fin material 1 along the transfer table 2 in the transfer direction (in the direction of arrow P in the figure) at a constant speed. It plays a role, and is composed of a right-handed twist worm 3a and a left-handed twist worm 3b that rotate by engaging with both shoulders 11b, 11b on the peak 11 side of the corrugated fin material 1, respectively.

  Both worms 3a and 3b are connected by a gear (not shown) and rotated by a servo motor in the direction of arrow S. The trough portion 12 of the corrugated fin material 1 transferred from this rotational speed. Can be counted. That is, it also serves as a counting worm.

  Further, the transfer table 2 between the transfer device 3 and the cutting device 4 is provided with a fin guide 21 that guides the transfer in a state of covering the left and right sides and the upper surface of the corrugated fin material 1.

  The cutting device 4 serves to cut the corrugated fin material 1 at a predetermined length at the valley 12 and is inserted into the valley 12 to increase the pitch as shown in FIGS. The guide guide 41 positioned together with the fixed blade 42 provided on the lower surface of the corrugated fin member 1 inserted into the valley portion 12 whose pitch is increased along the guide guide 41 inserted into the valley portion 12. The movable blade 43 is configured to shear the bottom of the valley portion 12 between the guide guide 41 and the movable blade 43.

  The guide guide 41 is driven up and down by a guide guide drive cam 44a in the drive device 44, and is provided so as to be movable up and down with respect to the lift guide 41a. The guide guide 41 is urged in the upward direction by the coil spring 41d so that the roller 41e provided at the upper end of the guide guide 41 always abuts against the cam surface of the guide guide drive cam 44a.

  In addition, the guide guide 41 is formed with a narrow width at the center of the tip (lower end) of the guide material 41 so as to be partially inserted only in the center in the width direction of the valley 12 in the fin material 1. A roller 41b having a slightly larger diameter than the width of the portion 12 is rotatably provided. The roller 41b serves to smoothly insert the guide guide 41 into the central portion in the width direction of the valley portion 12 by rotating.

  Further, the guide guide 41 is provided with a pressure air injection nozzle 41c that pushes the valley of the fin material 1 by injecting the pressure air before the guide guide 41 is inserted.

  The movable blade 43 is driven up and down by a movable blade driving cam 44b in the drive device 44, and is provided so as to be movable up and down with respect to the lift guide 41f. Has been.

  As shown in FIGS. 7 to 10, the movable blade 43 includes a base portion 43b that is detachably attached to and fixed to a movable blade attachment portion 43a that is supported to be movable up and down with respect to the elevation guide 41a, and gradually from the base portion 43b. The blade surface 43c converges and sharpens, and a wide guide 43d is formed on the blade surface 43c.

  The wide guide 43d has a central portion of the blade surface 43c slightly thicker than the inclination of the blade, and the wide guide 43d extends along a mountain-shaped protrusion at the center in the width direction of the corrugated fin material 1. The louver 13 is formed so as to enter and pass through the side wall portion where the louver 13 is not formed, and is formed in an upper and lower belt shape at the central portion of the blade surface 43c.

  Further, both end sides of the blade surface 43c are formed to have the same thickness as the base portion 43b, the blade tip gradually converges toward the tip (lower end), and the tip (lower end) is a sharp blade.

  When the movable blade 43 enters the trough 12 of the corrugated fin material 1, the wide guide 43 d comes into contact with the mountain-shaped protrusion and pushes the trough 12 of the corrugated fin material 1.

  The guide guide driving cam 44a has a cam shape as shown in FIGS. 3 and 6A and is rotatably provided on the rotating shaft 44d of the drive motor 44c. By rotating in contact with the upper surface, the guide guide 41 is moved up and down by a cam curve as shown in FIG.

  The movable blade driving cam 44b is interlocked with the operation of the guide guide driving cam 44a. As shown in FIG. 3, the lower end of the movable blade driving cam 44b slides in contact with the horizontal upper end surface of the movable blade mounting portion 43a. It is formed in a square shape having a horizontal sliding surface. Then, as shown in FIG. 4, the movable blade driving cam 44b has an eccentric shaft 44f that is eccentric from the upper rotating shaft 44d of the rotating arm 44e whose lower end is fixed to the tip of the rotating shaft 44d of the driving motor 44c. On the other hand, by connecting via the bearing 44g, the arc of the eccentric shaft 44f that rotates about the rotation shaft 44d moves up and down and left and right as a cam curve (see FIG. 6C), thereby making it movable. The blade mounting portion 43 a is moved up and down together with the movable blade 43 to cut the bottom portion of the valley portion 12 in the fin material 1 between the blade mounting portion 43 a and the fixed blade 42.

  Next, operations and effects of the first embodiment will be described.

  First, the operation of the first embodiment will be described with reference to FIGS.

  Since the first embodiment is configured as described above, as shown in FIG. 1, the right twist worm 3a and the left twist worm 3b constituting the moving device 3 are each processed in a wave shape by rotating in the direction of arrow S. The fin material 1 is continuously transferred along the transfer table 2 while measuring the number of the valley portions 12 of the fin material 1, and at the bottom of the valley portion 12 every predetermined length in the cutting device 4 during this transfer. Disconnect.

  In this cutting device 4, when the drive motor 44c is rotated in the direction of arrow M from the top dead center of the guide guide 41 shown in FIGS. 3, 4, and 6 (the 0 ° rotation position of the guide guide drive cam 44a), As shown in FIGS. 6 and 11 (a) to 11 (b), the lower end of the guide guide 41 is transferred until the guide guide drive cam 44a, which is the bottom dead center of the guide guide 41, reaches the 90 ° rotation position. It is inserted into the valley portion 12 of the fin material 1 inside, and at that time, the roller 41b provided at the lower end of the guide guide 41 is rotated so that it is smoothly inserted into the central portion in the width direction in the valley portion 12. The Then, by inserting the guide guide 41 into the trough 12, the trough 12 at the position to be cut is positioned, and the pitch of the trough 12 is expanded, whereby the movable blade 43 is inserted. Easy state.

  On the other hand, the movable blade 43 is lowered from the position of the top dead center to a position that is half the full stroke.

  Next, as shown in FIG. 6 and FIG. 11C, the guide guide 41 is maintained at the bottom dead center position from the 90 ° rotation position to the 180 ° rotation position of the guide guide driving cam 44a. Then, the movable blade 43 descends along the guide guide 41 to the bottom dead center, and shears the fin material 1 with the fixed blade 42 at the bottom of the valley portion 12.

  When inserting the cutting edge into the trough 12 of the fin material 1, the width direction in which the wide guide 43 d formed thicker than the blade surface 43 c of the movable blade 43 becomes a mountain-shaped protrusion downstream of the fin material 1 in the transfer direction. Since the valley portion 12 is inserted while being gradually expanded by abutting against the central side wall portion, the contact of the blade edge with the side wall portion of the valley portion 12 is prevented, and the cutting edge of the movable blade 43 moves to the bottom portion of the valley portion 12. You will be surely guided.

  Next, as shown in FIGS. 6 and 11 (d), the guide guide 41 and the movable blade 43 are located in the valleys of the fin material 1 between the 180 ° rotation position and the 270 ° rotation position of the guide guide driving cam 44a. As shown in FIGS. 6 and 11 (a), the top dead center is reached between the 270 ° rotation position and the 0 ° (360 °) rotation position of the guide guide drive cam 44a. Return to position.

  By repeating the above operations, the fin material 1 can be continuously cut for each predetermined length (predetermined number of valleys) while the fin material 1 is continuously transferred.

  As described in detail above, in the corrugated fin cutting device of the first embodiment, the guide 41 is provided in the valley 12 of the fin material 1 by providing the roller 41b at the tip of the guide guide 41. When inserting, even if the roller 41b provided at the tip of the guide guide 41 abuts against the peak portion 12 of the fin material 1, the roller guide 41 pushes and spreads the valley 12 of the fin material 1 while the roller 41b rotates. Is smoothly inserted into the valley 12 of the fin material 1.

  Accordingly, it is possible to prevent the guide guide 41 from interfering with the peak portion 12 of the fin material 1 and causing buckling without providing the fin material 1 positioning equipment, thereby simplifying the equipment at the cutting portion. In addition, it is possible to obtain an effect that the high product accuracy and yield of the corrugated fin can be improved.

  In addition, the guide guide 41 is provided with a pressure air injection nozzle 41c that expands the valley portion of the fin material 1 by injecting the pressure air before the guide guide 41 is inserted. The trough 12 of the fin material 1 can be expanded without being complicated, and the guide guide 41 can be inserted into the trough 12 of the fin material 1 more smoothly.

  Further, by providing a wide guide 43d formed thicker than the blade surface 43c in the movable blade 43, the wide guide 43 comes into contact with the mountain-shaped protrusion on the downstream side of the fin material 1 in the transfer direction, thereby Since the ridgeline portion 11a is inserted while gradually expanding the ridgeline 12, the corrugated fin material 1 in which each ridgeline portion 11a is corrected into a mountain shape can be easily cut by enlarging the trough portion 12.

  Moreover, since the fin material 1 can be continuously cut without stopping the transfer of the fin material 1, the productivity can be improved.

  Next, another embodiment will be described. In the description of the other embodiments, the same components as those of the first embodiment are not shown, or the same reference numerals are given and the description thereof is omitted, and only the differences are described.

  The second embodiment shows a modification of the apparatus in the first embodiment. As shown in FIGS. 12 and 13, as a means for driving the movable blade 42 up and down, the movable blade driving cam 44b of the first embodiment. Instead of the above, the point that the link 44h is used is different from the first embodiment.

That is, the upper end portion of the link 44h is pivotally supported a with respect to the eccentric shaft 44f while the lower end portion is pivotally supported b with respect to the base portion 43b, whereby the rotation of the drive motor 44c is performed via the link 44h. The base 43b can be driven up and down.
Therefore, also in the second embodiment, the same effect as in the first embodiment can be obtained.

  Although the present embodiment has been described above, the present invention is not limited to the above-described first embodiment, and design changes and the like within a scope not departing from the gist of the present invention are included in the present invention.

  For example, in the embodiment, the case where the fin material 1 is corrected in a mountain shape in which the center portion of each ridge line portion 11a protrudes in a direction opposite to the feeding direction of the fin material 1 is taken as an example. The present invention can also be applied to the case of cutting a fin material that has been corrected to a chevron shape in which the central portion of 11a protrudes in the feed-out direction of the fin material 1 or a fin material that has not been corrected to a chevron shape. At that time, the shape of the movable blade may be exchanged according to the type of the fin material. That is, the shape of the movable blade is arbitrary.

  In the embodiment, the cutting device is fixedly arranged. However, by providing synchronous movement means for reciprocating in synchronization with the transfer speed of the fin material 1, it is possible to cope with high speed cutting.

  In the first embodiment, the guide guide 41 and the movable blade 43 are moved up and down by the guide guide drive cam 44a and the movable blade drive cam 44b driven by the drive motor 44c. In the second embodiment, the guide guide drive cam 44b is driven. The cam 44a and the link 44h are used, but the configuration is arbitrary.

  Further, by providing an air blow nozzle for rotating the rotation roller 41b, the guide guide 41 can be inserted into the valley portion 12 of the fin material 1 more smoothly without complicating the tip of the guide guide 41. become.

It is a whole top view which shows the corrugated fin cutting device of Example 1. It is a side view which shows the corrugated fin cutting device of Example 1. It is an enlarged front view seen from the A arrow direction of FIG. It is a center longitudinal cross-sectional view of FIG. It is a perspective view which shows a fin material. (A) is the cam shape of the guide guide driving cam, (B) is the cam curve of the guide guide driving cam, and (C) is the cam curve of the movable blade driving cam. It is a front view which shows a movable blade. It is a bottom view which shows a movable blade. It is a longitudinal cross-sectional view in the BB line of FIG. It is a cross-sectional view in the CC line of FIG. It is process drawing which shows the action | operation of the corrugated fin cutting device of Example 1. It is an enlarged front view which shows the corrugated fin cutting device of Example 2. It is a center longitudinal cross-sectional view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fin material 11 Mountain part 11a Ridge part 11b Shoulder part 12 Valley part 13 Louver 2 Transfer stand 21 Fin guide 3 Transfer means 3a Right twist worm 3b Left twist worm 4 Cutting device 41 Guide guide 41a Lifting guide 41b Roller 41c Air blow nozzle 41d Coil Spring 42 Fixed blade 43 Movable blade 43a Movable blade mounting portion 43b Base portion 43c Blade surface 43d Wide guide 44 Drive device 44a Guide guide drive cam 44b Movable blade drive cam 44c Drive motor 44d Rotating shaft 44e Rotating arm 44f Eccentric shaft 44g Bearing 44h link

Claims (6)

The fin material processed into a wave shape is transferred continuously or intermittently, and is cut along the guide guide in a state where the guide guide is inserted and positioned in the valley portion of the fin material during transfer or intermittent stop. A corrugated fin cutting method in which a movable blade is inserted into the valley and the bottom of the valley is cut between the fixed blade,
A corrugated fin characterized in that the guide guide is smoothly inserted into the valley of the fin material by expanding a valley of the fin material while a roller provided at the tip of the guide guide rotates. Cutting method. The fin material processed into a wave shape is transferred continuously or intermittently, and is cut along the guide guide in a state where the guide guide is inserted and positioned in the valley portion of the fin material during transfer or intermittent stop. A corrugated fin cutting device that inserts a movable blade into the valley and cuts the bottom of the valley between the fixed blade,
A corrugated fin cutting device characterized in that a rotating roller is provided at the tip of the guide guide to rotate while expanding the valley of the fin material.   The corrugated fin cutting device according to claim 2, wherein the guide is smoothly inserted into the valley of the fin member by rotating the rotating roller.   The corrugated fin cutting device according to claim 2 or 3, further comprising a pressure air injection nozzle that expands a trough portion of the fin material by injecting pressure air before the guide guide is inserted. apparatus.   The width | variety of the said rotating roller is narrowly formed so that it may be inserted only in the width direction center part or both ends of the trough part in the said fin material, The any one of Claims 2-4 characterized by the above-mentioned. The corrugated fin cutting device according to Item. The corrugated fin material is continuously transferred,
The corrugate according to any one of claims 2 to 5, further comprising a synchronous moving means for moving the guide guide and the movable blade and the fixed blade in synchronization with a transfer speed of the fin material. Fin cutting device.

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