WO2007141958A1

WO2007141958A1 - Method of manufacturing honeycomb structure

Info

Publication number: WO2007141958A1
Application number: PCT/JP2007/058237
Authority: WO
Inventors: Shintaro Tabata
Original assignee: Calsonic Kansei Corporation
Priority date: 2006-06-06
Filing date: 2007-04-16
Publication date: 2007-12-13
Also published as: JP2007325990A

Abstract

A method of manufacturing a honeycomb structure, in which a honeycomb structure manufactured by superposing a corrugated sheet and a flat sheet over each other and rolling up the resultant is press fitted into a container and reliably held in position without deformation. In the method of manufacturing a honeycomb structure prepared by superposing a corrugated sheet and a flat sheet over each other and rolling up the resultant in a spiral form, a portion near the leading edge of the rolling, which leading edge is the edge on the outer peripheral side of both the corrugated plate and flat plate of the honeycomb structure, is pulled in the longitudinal direction corresponding to the direction of the rolling. As a result, the honeycomb structure is formed such that the closer to the leading edge of the rolling, the greater the pitch of the corrugations, and this in turn results that the closer to the leading edge of the rolling, the lower the height of the corrugations.

Description

Specification

Manufacturing method of honeycomb structure

Technical field

The present invention relates to a method for manufacturing a honeycomb structure in which corrugated plates and flat plates are overlapped and wound into a spiral shape.

Background art

[0002] For vehicles equipped with an internal combustion engine such as an automobile, as an exhaust purification device for removing harmful components contained in exhaust gas, for example, as disclosed in JP-A-2004-36398 A structure in which a honeycomb structure supporting a catalyst is accommodated in a container is known.

[0003] As a her cam structure, for example, a metal carrier manufactured by winding a metal corrugated plate and a flat plate on each other is known. Usually, press fitting is performed when housing the hard cam structure having the metal carrier force in the container.

Disclosure of the invention

[0004] By the way, when the corrugated plate and the flat plate described above are wound together, a step is formed in the circumferential direction by the wave height of the corrugated plate at the winding end on the outer peripheral side of the her cam structure. The For this reason, when the her cam structure is press-fitted into the container, the metal cam structure is locally deformed by the step, and this deformation propagates to the center.

[0005] The her cam structure deformed in this way is different from the original design shape, and when used as an exhaust purification device, the exhaust purification performance is reduced.

[0006] In contrast, the above-mentioned publication describes that a buffer member is interposed between the her cam structure and the container. This her cam structure is made of ceramic and has a substantially circular cross section, and does not have a step on the outer peripheral portion like the her cam structure having the metal carrier force described above. Therefore, the buffer member has a constant thickness over the entire circumference.

[0007] When such a constant thickness buffer member is applied to a metal carrier having a step on the outer periphery. In this case, the stepped portion cannot be absorbed by the buffer member, and the her cam structure which is a metal carrier force is not sufficiently held, resulting in a decrease in reliability as an exhaust purification device.

Here, it is conceivable to change the thickness of the buffer member in accordance with the step. However, in that case, extra work such as alignment of the buffer member and the hard cam structure is required, resulting in deterioration of workability, and the use of the buffer member increases the number of parts. Invite.

[0009] Accordingly, the present invention provides a two-cam structure manufactured by overlapping and winding a corrugated plate and a flat plate and press-fitting the container into a container to ensure sufficient holding, while deforming the her cam structure. The purpose is to prevent it.

[0010] According to an aspect of the present invention, there is provided a method of manufacturing a her cam structure in which corrugated plates and flat plates are overlapped and wound into a spiral shape. And by pulling the corrugated plate in the length direction corresponding to the winding direction of the vicinity of the winding end on the outer peripheral side of the flat plate, the wave pitch of the corrugated plate is increased toward the winding end to increase the wave height. The most important feature is that the lower end of the winding is lower.

Brief Description of Drawings

FIG. 1 is a simplified overall configuration diagram showing an apparatus for manufacturing a hard cam structure according to an embodiment of the present invention.

[FIG. 2] FIG. 2 is a front view showing details of the corrugated sheet forming machine in the apparatus for manufacturing the her cam structure of FIG.

FIG. 3 is a partial front view showing details of a forming roll portion in the corrugated sheet forming machine of FIG. 2.

FIG. 4 is a partial front view showing details of a pitch filling roll section in the corrugated sheet forming machine of FIG.

FIG. 5 is a partial front view showing details of a shaping roll section in the corrugated sheet forming machine of FIG. 2.

[Fig. 6] Fig. 6 is a front view showing the whole winding end portion forming machine of Fig. 2. [Fig.

[FIG. 7] FIG. 7 is an enlarged front view of a divider driving unit in the winding end portion forming machine of FIG.

[FIG. 8] FIG. 8 (a) is an explanatory view of the operation of the winding end portion forming machine of FIG. Fig. 8 (b) is a diagram illustrating the operation of the rolled-up end forming machine shown in Fig. 6, and the next divider enters the trough of the corrugated sheet. The state where the 1st pitch expansion part was formed is shown.

[Fig. 9] Fig. 9 (a) is an explanatory diagram of the operation of the rolled-up end forming machine of Fig. 6. The state force of Fig. 8 (b) and the next divider enters the trough of the corrugated plate and the second pitch enlarged portion is FIG. 9 (b) is an explanatory diagram of the operation of the rolled-up end forming machine shown in FIG. 6, and shows a state where the next divider enters the trough portion of the corrugated sheet to form the third pitch enlarged portion.

[Fig. 10] Fig. 10 (a) is an explanatory diagram of the operation of the hoisting end forming machine in Fig. 6 and shows the state in which the end of the corrugated plate is stretched almost flat by the last divider, and Fig. 10 (b ) Is an explanatory diagram of the operation of the rolled-up end forming machine in FIG. 6 and shows a state in which the corrugated plate is cut by the cutting tool in the state of FIG. 10 (a).

FIG. 11 (a) is a cross-sectional view of a honeycomb structure manufactured by the manufacturing apparatus of FIG. 1, and FIG. 11 (b) is a cross-sectional view of a conventional honeycomb structure.

[FIG. 12] FIG. 12 (a) shows a state before the corrugated sheet is stretched, FIG. 12 (b) shows a state in which the corrugated sheet is stretched to some extent, and FIG. 12 (c) shows the corrugated sheet stretched. It is a figure which shows a state.

[FIG. 13] FIG. 13 is an explanatory view showing a state in which the her cam structure of FIG. 11 (a) is press-fitted into a metal cylindrical container.

FIG. 14 is a cross-sectional view showing a state in which a two-cam structure body press-fitted into a cylindrical container is fitted and fixed between an inlet user and an outlet user on an exhaust passage in an automobile.

[Fig. 15] Fig. 15 (a) shows the relationship between the wave height and wave pitch of the corrugated plate and is larger than the wave pitch, and Fig. 15 (b) shows the relationship between the wave height and wave pitch of the corrugated plate. Is a figure smaller than the wave pitch.

FIG. 16 is a front view showing a part of a two-cam structure using the corrugated sheet of FIG. 15 (a).

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0013] FIG. 1 is a simplified diagram showing an apparatus for manufacturing a hard cam structure according to an embodiment of the present invention. FIG. This apparatus for manufacturing a hard cam structure supplies a flat plate 3 from a flat plate supply stand 1 to a winding stand 5 as a winding portion, and at the same time, corrugated plate material supply stand 7 installed on the opposite side of the flat plate supply stand 1. Then, the corrugated sheet material 9 is supplied to the winding stand 5 as the corrugated sheet 15 through the corrugated sheet forming machine 11 and the rolled-up end forming apparatus 13.

The flat plate supply stand 1 is formed by winding the flat plate 3 as a coil material around a core portion 19 that is rotatably installed at the upper end of the leg portion 17. Then, the flat plate supply stand 1 feeds the flat plate 3 with a pair of pinch rollers 21 having a drive mechanism (not shown), whereby the core portion 19 rotates in the direction of arrow A in the drawing, and the coil material is guided to the guide roller 23. Supplied to take-up stand 5 via.

[0015] The corrugated material supply stand 7 has a corrugated sheet material 9 having a flat plate force similar to that of the flat plate 3 wound around a core portion 27 rotatably installed at the upper end of the leg portion 25 as a coil material. . The corrugated sheet material supply stand 7 supplies the coil material to the corrugated sheet forming machine 11 by rotating the core portion 27 in the direction of arrow B in the figure by a drive mechanism (not shown).

[0016] The winding stand 5 for winding the flat plate 3 and the corrugated plate 15 described above is wound around the upper end of the leg 29 so as to be rotatable by a drive mechanism in the direction of arrow C in the drawing. It has a take-off section 31. Then, a metal carrier in which the corrugated plates 15 and the flat plates 3 are alternately overlapped with each other by winding the corrugated plate 15 into the core portion 31 from the lower side and the corrugated plate 15 from the upper side. A later-described her cam structure 71 (see FIG. 11 (a)) is manufactured.

[0017] The corrugated sheet forming machine 11 forms the corrugated sheet material 9 having flat plate force into the corrugated sheet 15 step by step from the upstream side in the feed direction of the corrugated sheet material 9 to the forming roll section 33, pitch packing. A roll part 35 and a shaping roll part 37 are sequentially installed.

The forming roll unit 33 includes a pair of upper and lower forming rolls 33a and 33b that rotate synchronously as shown in detail in FIG. As shown in FIG. 3, a plurality of forming teeth 330a and 330b are formed on the outer peripheral surfaces of these forming rolls 33a and 33b, respectively. The formed teeth 330a and 330b are fitted to each other at a predetermined interval, and the corrugated sheet material 9 is supplied by supplying the corrugated sheet material 9 between the rolls while being driven to rotate in the directions of arrows D and E in FIG. Is formed into a first corrugated sheet 9A as shown in FIG. The pitch filling roll unit 35 includes a pair of upper and lower pitch filling rolls 35a and 35b that rotate synchronously. As shown in FIG. 4, formed teeth 350a and 350b are formed on the outer peripheral surfaces of the pitch filling rolls 35a and 35b, respectively. The corrugated sheet 9A discharged from the upstream forming roll section 33 is temporarily dammed up at the inlet side of the pitch filling roll section 35 to become the second corrugated sheet 9B in which the corrugated sheet tops are pressed against each other. .

[0020] In the second wave shape, each corrugated plate top has a substantially semicircular shape. In this state, when the pitch filling rolls 35a and 35b are driven to rotate in the directions of arrows F and G in FIG. 2, the crests of the forming teeth 350a and 350b enter between the crests of the pressed plates, and the troughs are crests. Separate the tops of the corrugated plates while holding down the entire surface. As a result, the corrugated plate tops are separated on the exit side, resulting in a corrugated plate 9C having a corrugated pitch wider than the second corrugated shape and a third corrugated shape.

Here, if the top of the corrugated plate is moved while being partially pressed, the corrugated plate 9B may be deformed. However, in this embodiment, as shown in FIG. 4, the corrugated plate tops are separated from each other while holding the corrugated plate tops over the entire surface, so that deformation of the corrugated plate 9B can be prevented.

[0022] The shaping roll unit 37 includes a pair of upper and lower shaping rolls 37a and 37b that rotate synchronously in the directions of arrows H and I in FIG. Further, as shown in FIG. 5, formed teeth 370a and 370b are formed on the outer peripheral surfaces of the shaping rolls 37a and 37b, respectively. The crests of the formed teeth 37 Oa and 370b enter between the tops of the corrugated sheet 9C formed in the third corrugated shape and pull up the corrugated sheet 9C, so that the corrugated sheet pitch is widened.

[0023] Here, in consideration of the elastic region of the corrugated sheet 9C, the corrugated sheet pitch is pulled up to be wider than the target value. The corrugated plate 9D (corresponding to the corrugated plate 15 shown in Fig. 1) discharged from the shaping roll unit 37 has a final corrugated wave shape that is contracted by elastic force, that is, springback. To be molded.

[0024] Between the forming roll part 33 and the pitch filling roll part 35 and between the pitch filling roll part 35 and the shaping roll part 37, in the thickness direction and the width direction of the corrugated plates 9A, 9B, 9C. In addition to suppressing the skew of the sheet, a guide portion (not shown) for separating the formed tooth force corrugated plates 9A, 9B, 9C formed on the rolls of the respective portions is arranged.

[0025] Next, the wound-up end forming machine 13 will be described. Figure 6 shows the roll-up end forming machine 13 It is the front view which simplified and showed the whole. The winding-up end forming machine 13 includes a divider driving unit 39 and an end holding and cutting unit 41 installed on the upstream side thereof.

As shown in an enlarged view in FIG. 7, the divider drive unit 39 is a bell with a divider as a moving body that is wound around the drive roller 43 and the other four rollers 45, 47, 49, 51 to rotate. 53, and four dividers 55, 57, 59, 61 as locking members are attached to the outer periphery of the belt 53 with divider.

[0027] Dividers 55, 57, 59, 61 are plate-like members having a width dimension (width in a direction perpendicular to the paper surface in FIG. 7) substantially the same as the width dimension of corrugated sheet material 9 (corrugated sheet 15). The tip is tapered so that the tip can be easily inserted into the valley of the corrugated plate 15. Further, the dividers 55, 57, 59, 61 are attached at appropriate intervals in a region that is almost half of the entire length of the belt with divider 53.

[0028] As shown in Fig. 7, the belt 53 with a divider is wound around the drive roller 43 and the other four rollers 45, 47, 49, 51 so as to have a substantially rectangular shape that is long in the moving direction of the corrugated plate 15 in a front view. It has been turned. At this time, in FIG. 7 of the above rectangular shape, the driving roller 43 is installed on the upper right side, the other rollers 51, 45 are installed on the lower right side and the upper left side, and two other rollers 47, 45 are installed on the lower left side. 49 are installed.

[0029] Of the two rollers 47, 49 in the lower left portion, one roller 47 is located directly below the upper left roller 45, and is located on the upper side farther away from the corrugated plate 15 than the lower right roller 51. is doing. The other roller 49 out of the two rollers 47 and 49 is positioned in the vicinity of the roller 47 between the roller 47 and the lower right roller 51, and up and down in FIG. The direction is the same position.

[0030] The end holding and cutting part 41 installed on the upstream side of the divider driving part 39 is provided with an end holding tool 63 as a fixing part for holding the corrugated plate 9D, and on the downstream side of the end holding tool 63. And a cutting tool 65 arranged close to each other.

[0031] The end holder 63 includes an upper convex member 67 and a lower concave member 69 in FIG. 6 with the corrugated plate 9D interposed therebetween, and the convex member 67 and the concave member 69 approach each other. The corrugated plate 9D is fixedly held by moving and fitting. On the other hand, in the cutting tool 65, the cutting blade 70 moves closer to the corrugated plate 9D. Cut the corrugated sheet 9D.

Next, the operation will be described. As shown in Fig. 1, at the same time as supplying flat plate 3 from flat plate supply stand 1 to winding stand 5, corrugated sheet material 9 is supplied from corrugated material supply stand 7 to corrugated sheet forming machine 11, hoisting end forming machine 13 Then, the corrugated plate 15 and the flat plate 9 are alternately overlapped and wound in a spiral shape to produce a her cam structure 71.

[0033] At this time, a constant wave number from the position where the amount of winding of the flat plate 3 and the corrugated plate 15 (the corrugated plate 9D) at the winding stand 5 becomes a predetermined amount near the winding end to the end side. The part where is set is detected by a sensor (not shown), and when this detection is performed, the corrugated sheet forming work by the corrugated sheet forming machine 11 is stopped. At this point, force to stop the supply of corrugated sheet material 9 to corrugated sheet forming machine 11 Supply of flat plate 3 from flat plate supply stand 1 and winding work of flat plate 3 and corrugated sheet 15 at take-up stand 5 Will continue.

[0034] It should be noted that a constant wave number is set further to the end side from the position where the amount of winding of the flat plate 3 and the corrugated plate 15 (corrugated plate 9D) at the winding stand 5 becomes a specified amount near the winding end. For example, an encoder for measuring the number of rotations of a roll shaft (not shown) coaxial with the forming roll 33a can be used to detect the detected portion.

[0035] After the corrugated sheet forming operation by the corrugated sheet forming machine 11 is stopped, the corrugated sheet 9D is held by the end holder 63 and the divider driving unit 39 is driven as shown in FIG. 8 (a). The roller 43 is driven to rotate the divider-equipped belt 53 in the direction indicated by the arrow J so as to synchronize with the movement of the corrugated plate 9D. At this time, the divider-equipped belt 53 before the start of the rotational movement is in the position where all of the four dividers 55, 57, 59, 61 provided in almost half of the area are separated by the corrugated plate 9D force, and the rotational movement The stop position is set in advance so that the divider 55 located at the forefront of the direction first enters the trough of the corrugated plate 9D.

[0036] The timing of the operation of holding the corrugated plate 9D of the end holder 63 and the operation of the divider 55 entering the trough of the corrugated plate 9D is immediately after the end holder 63 holds the corrugated plate 9D. On the contrary, if the divider 55 enters the valley, the end holder 63 may hold the corrugated plate 9D immediately after the divider 55 enters the valley. You may go. [0037] When the divider 55 moves with the movement of the corrugated plate 9D in a state where it enters the trough of the corrugated plate 9D as shown in Fig. 8 (a), the wave between the divider 55 and the end holder 63 is removed. The plate 9D is stretched to increase the wave pitch of the corrugated plate. In this state where the wave pitch is expanded, as shown in Fig. 8 (b), when the next divider 57 enters the trough of the corrugated plate 9D, the first wave pitch between the dividers 55 and 57 is expanded. A pitch expansion portion P is formed.

[0038] From the state of FIG. 8 (b), the belt 53 with a divider further rotates with the movement of the corrugated plate 9D, and this time, the corrugated plate 9D between the divider 57 and the end holder 63 is stretched. The wave pitch of corrugated sheet 9D is further expanded. With this wave pitch further expanded, the next divider 59 enters the trough of the corrugated plate 9D as shown in Fig. 9 (a), and the wave pitch between dividers 57 and 59 is further expanded. 2 pitch expansion part Q is formed. At this time, the divider 55 that first enters the trough of the corrugated sheet 9D is moved to a position where the corrugated sheet 9D force is also away.

[0039] From the state of Fig. 9 (a), as the corrugated plate 9D further moves, the belt 53 with a divider rotates and this time, the corrugated plate 9D between the divider 59 and the end holder 63 is stretched. The wave pitch of corrugated sheet 9D is further expanded. With this wave pitch further expanded, the next divider 61 enters the valley of the corrugated plate 9D as shown in Fig. 9 (b), and the wave pitch between the dividers 59 and 61 is further expanded. A 3-pitch enlarged portion R is formed. At this time, the divider 57 has moved to a position away from the corrugated sheet 9D force.

[0040] Since each of the dividers 55, 57, 59, 61 has a tapered shape with a tapered tip, it smoothly enters the valley without crushing the peak of the corrugated plate 9D.

[0041] From the state shown in Fig. 9 (b), the belt 53 with a divider further rotates as the corrugated plate 9D moves, and the divider 61 reaches the vicinity of the roller 51 at the lower right side as shown in Fig. 10 (a). Then, the corrugated sheet 9D is stretched in a substantially flat plate shape, and in this state, as shown in FIG. 10 (b), the cutting blade 70 descends to cut the corrugated sheet 9D that is flat.

[0042] After the cutting, the holding of the corrugated plate 9D by the end holder 63 is released, and in this state, the corrugated plate 9D is wound around the winding stand 5 together with the flat plate 3. The flat plate 3 is cut with a cutting tool (not shown) so that it matches the end of the corrugated plate 9D. It will be in the state where it overlapped with. FIG. 11A is a cross-sectional view of the two-cam structure 71 manufactured by winding in this manner. In the vicinity of the winding end 73 where the ends of the corrugated sheet 15 (corrugated sheet 9D) and the flat plate 3 are overlapped, the corrugated sheet 15 (corrugated sheet 9D) has a flat plate shape. There will be almost no steps at the top. Since the height of the corrugated sheet 15 (corrugated sheet 9D) gradually decreases along the circumferential direction from the winding end 73, the outer shape of the her cam structure 71 as a whole is circumferential. A substantially circular shape with no step along the line.

[0044] On the other hand, as shown in FIG. 11 (b), the corrugated plate 150 is a her cam structure 710 having a corrugated shape having the same wave height over the entire length including the rolled-up end 730. In this case, a large step K corresponding to the wave height occurs at the winding end 730.

FIG. 12 shows the relationship between the wave pitch fp and the wave height fh at the same development length of the corrugated plate. By stretching the corrugated plate as described above, the wave pitch fp expands in the order of Fig. 12 (a), (b), (c), and the wave height fh is accordingly increased in Fig. 12 (a), (b). , (c) in the order of decreasing.

As shown in FIG. 13, the double cam structure 71 having no step at the winding end 73 as shown in FIG. 11 (a) and having a substantially circular outer shape is wound with a brazing foil material around the outer periphery. Then, the corrugated sheet 15 and the flat plate 3 are diffusion-bonded by press-fitting into a metal cylindrical container 75 and heated in a vacuum state, and the cylindrical container 75 is brazed and joined.

[0047] Since the above-mentioned nose-cam structure 71 has almost no step at the outer peripheral portion, it can be prevented from being locally deformed when it is press-fitted into the cylindrical container 75. Phenomena that propagate to the center also do not occur.

As shown in FIG. 14, the nozzle-cam structure 71 press-fitted and fixed to the cylindrical container 75 in this manner is provided between the inlet Dich user 77 and the outlet Dich user 79 on the exhaust passage in the automobile. It is used as an exhaust purification device by inserting and fixing together.

[0049] When used as an exhaust emission control device, since the her cam structure 71 that prevents deformation is used, it is possible to prevent the exhaust purification performance from being deteriorated. When the cylindrical container 75 is held, a buffer member for absorbing the step is not necessary, so that it is possible to prevent an increase in the number of parts and a deterioration in assembling workability.

[0050] As an example of the relationship between the wave height fh of the corrugated plate 9D and the wave pitch fp, before the wave pitch is expanded, fh = 2mm, fp = l.6mm, the first shown in FIG. 8 (b). Pitch expansion part P force fh = l. 5mm, fp = 3.1, second pitch expansion force shown in Fig. 9 (a) fh = l. Omm, fp = 3.8 mm, third pitch expansion portion R force fh = 0.5 mm shown in Fig. 9 (b) , fp = 4.2 mm.

[0051] By the way, in recent years, in order to improve the exhaust purification performance, a corrugated corrugated plate as shown in Fig. 15 (a) is being used. The wave shape in Fig. 15 (a) makes the wave height fh larger than the wave pitch fp. That is, fhZfp> l. On the other hand, the wave shape in Fig. 15 (b) is fhZfp <1 and the wave height fh is smaller than the wave pitch fp.

[0052] FIG. 16 shows a part of the Hercam structure in which the wave height fh is larger than the wave pitch fp as described above. According to this her cam structure, the exhaust gas is purified by the exhaust gas flowing in the cell 81 surrounded by the corrugated plate 15 and the flat plate 3.

[0053] At this time, useless catalyst that accumulates in the vicinity of the contact portion between the corrugated plate 15 and the flat plate 3 makes the wave height fh larger than the wave pitch fp, so that the rising portion of the corrugated plate 15 is almost the same as the flat plate 3. The vertical one is smaller than the one in which the wave height fh is smaller than the wave pitch fp and the rising portion of the corrugated plate 15 is more nearly parallel to the flat plate 3. For this reason, it is possible to improve the exhaust performance and effectively reduce the cost by effectively using the former Hercam structure body force catalyst.

[0054] In particular, when the relationship between the corrugated plate height fh and the corrugated plate pitch fp is fh / fp = 1.5, the representative length of the diameter that governs the heat transfer coefficient from the current corrugated plate ) Can be reduced, and the carrier can be easily warmed, and the time until the catalyst activity at the start of the engine can be shortened. Therefore, the purification performance in the cold region can be improved.

[0055] When the wave height fh is made larger than the wave pitch fp in order to improve the exhaust purification performance in this way, the outer peripheral end portion of the hard cam structure 710 in FIG. Since the step 730 becomes larger, it becomes more effective by eliminating the step so that the wave height of the corrugated plate 15 is lowered toward the winding end 73 as in this embodiment.

Industrial applicability

[0056] According to the present invention, about the vicinity of the winding end on the outer peripheral side of the corrugated plate and the flat plate of the her cam structure, by pulling the corrugated plate in the length direction corresponding to the winding direction, Since the wave pitch is increased toward the winding end and the wave height is decreased toward the winding end, the step at the winding end on the outer peripheral side of the her cam structure is reduced. The hard cam structure with a small step is press-fitted into the container to hold it sufficiently However, the deformation of the her cam structure can be prevented. In addition, when the honeycomb structure of the present invention is used as an exhaust purification device, performance degradation can be prevented, and a buffer member for housing the honeycomb structure in the container is also unnecessary. Therefore, it is possible to prevent an increase in the number of parts and a deterioration in assembly workability.

Claims

The scope of the claims

[1] In a method for manufacturing a honeycomb structure in which corrugated plates and flat plates are overlapped and wound into a spiral shape,

The wave pitch of the corrugated sheet is wound up by stretching the corrugated sheet in the length direction corresponding to the winding direction of the vicinity of the winding end of the honeycomb structure on the outer peripheral side of the corrugated sheet and the flat plate. A method for manufacturing a honeycomb structured body, characterized in that the end side is increased and the wave height is increased toward the end side.

[2] A method of manufacturing the her cam structure according to claim 1,

For the winding part that winds the corrugated sheet and the flat plate in a spiral shape, the supply of the corrugated sheet is stopped and the vicinity of the part that becomes the winding end is fixed by the fixing part, while the winding operation of the winding part is continued. In this case, a locking member provided on a moving body that moves along the moving direction of the corrugated sheet is inserted into the trough of the corrugated sheet, and the locking member moves along with the movement of the corrugated sheet. By doing so, the wave pitch of the corrugated plate between the locking member and the fixed part is increased to reduce the wave height.

A method for manufacturing a honeycomb structure, comprising:

[3] A method for manufacturing a honeycomb structured body according to claim 2,

A plurality of the locking members are provided at intervals along the moving direction of the moving body, and each locking member sequentially enters a trough of the corrugated plate, whereby each locking member and the fixed portion In between, the wave pitch of the corrugated plate is increased stepwise and the wave height is decreased stepwise.

A method for manufacturing a honeycomb structure, comprising: