JPH09117672A - Winding of metal honeycomb form - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a wind from becoming tight in a small diameter zone and thereby obtain a qualitatively stable honeycomb form with high dimensional accuracy when manufacturing the metal honeycomb by winding a metal plain foil and a metal corrupted foil laminated together. SOLUTION: When manufacturing a metal honeycomb by winding a metal plain foil 1 and a metal corrugated foil 2 laminated over each other using a winding shaft 5 and a pair of side clamps, these foils are wound at a low tension of 0.1-0.5kgf/mm<2> in a small diameter zone of a winding diameter of 5-50mm in which an excess wind tightening phenomenon is most likely to occur. In addition, on the outer peripheral face of winding, the inside of the metal corrugated foil 2 and the outside of the metal plain foil 1, and the inside of the metal plain foil 1 and the outside of the metal corrupted foil 2 within the range of 360 deg. in the peripheral direction, spot-welded at least, at one spot to fix both metal corrugated foil 2 and metal plain foil 1. After fixing these foils, their both lateral faces are supported by the pair of side clamps under pressure and wound at a higher tension than that of the small diameter zone, i.e., 0.6-5kgf/mm<2> .

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention is particularly applicable to 20 to 40 μm.
TECHNICAL FIELD The present invention relates to a method of winding a flat foil and a corrugated foil made of a metal foil having a thickness of m level into a honeycomb shape, and more specifically, a metal honeycomb capable of preventing winding tightness in a winding core when the flat foil and the corrugated foil are wound. It relates to a method of winding a body.

[0002]

2. Description of the Related Art For example, in recent years, there has been known a catalyst device in which a purifying catalyst is arranged in an exhaust passage of an internal combustion engine such as an automobile to purify harmful components such as HC, CO and NOx in exhaust gas. In this type of catalyst device, a metal honeycomb body is used as a catalyst carrier.

This metal honeycomb body is formed, for example, as shown in FIG. 3, by laminating a flat foil 1 of metal foil and a corrugated foil 2 and winding them in a spiral shape to form a cylindrical shape as shown in FIG. Innumerable through holes 4o are formed in the axial direction, and are generally inserted into the casing 3 for use.

As a method of winding the flat foil 1 and the corrugated foil 2 made of a metal foil in the case of manufacturing the metal honeycomb body 4, there is an invention described in JP-A-4-371234. In this invention, a winding device for obtaining a metal honeycomb body 4 by superposing a flat foil 1 and a corrugated foil 2 of a metal foil and winding them up is generally configured as shown in FIG.

In FIG. 5, reference numeral 5 denotes a driving device (not shown).
A pair of side clamps 6a and 6b are mounted on the winding shaft so that the space between them can be adjusted.
Between the pair of side clamps 6a and 6b, both end faces of the metal flat foil 1 and the metal corrugated foil 2 which are wound on the winding shaft 5 in a stacked manner can be pressure-supported.

As shown in FIG. 6, the winding shaft 5 of this winding device has a slit groove 5o through which the tips of the flat metal foil 1 and the corrugated metal foil 2 are inserted and locked. 3 outside 5
Book pressure rolls 7a, 7b, 7c are arranged in parallel with the winding shaft 5 so as to be able to move forward and backward with respect to the winding shaft by a drive device 8, and form a winding core (formed by winding 2 to 3 times). When
The rigidity of the winding shaft 5 is assisted and the winding shape can be adjusted.

In this winding device, the tips of the metal flat foil 1 and the metal corrugated foil 2 carried in from the foil supply device (not shown) are overlapped and inserted into and locked in the slit groove 5o of the winding shaft 5, Three winding rolls 7a, 7b, and 7c cooperate with the rotation of the winding shaft to start winding, two to three windings to form a winding core portion, and then the three rolling rolls are retracted to make a pair. The end faces of the metal flat foil 1 and the metal corrugated foil 2 are pressure-supported by the pressure-supporting faces of the center portions of the side clamps 6a and 6b to align the ends, and then the side clamps are wound while being pressure-supported. Then, the metal honeycomb body 4 can be manufactured.

When such a winding device is used, when a flat metal foil 1 and a metal corrugated foil 2 having a conventional level of thickness (50 to 100 μm) are superposed and wound into a honeycomb shape, a predetermined winding is automatically performed. It is possible to obtain a metal honeycomb body having a stable outer peripheral length and stable quality, and to improve the efficiency of the winding operation.

However, in recent years, with respect to a metal honeycomb body used as a catalyst carrier of a catalyst device, in order to improve catalyst efficiency, the thickness of the metal flat foil forming the honeycomb body and the metal foil used as a metal corrugated foil are further reduced. There is an increasing demand for a reduction in thickness (30 to 40 μm), and the rigidity of flat foils and corrugated foils becomes even smaller.

When the flat metal foil and the corrugated metal foil are bonded by diffusion bonding, it is necessary to increase the contact surface pressure at the bonding portion. Therefore, when winding the honeycomb body, the winding tension is increased. Since it is necessary, in winding for forming a honeycomb body, there is a growing concern about occurrence of defective shape, breakage, and the like, and the present invention is a winding method that does not cause such an inconvenient phenomenon. , It's hard to say that it's completely safe.

That is, in the present invention, when the flat metal foil and the corrugated foil are superposed and wound, the winding diameter is 1 by the winding shaft.
After winding up to 0 to 30 mm, both ends are pressed and supported by the pressurizing pressure supporting surface formed in the center of the pair of side clamps and wound up. When the foil is thick and the rigidity is relatively large Can suppress the winding tightness by increasing the pressure supporting force, but when the foil is thin and the rigidity is small, the pressure supporting force cannot be increased, so that the winding resistance increases as the winding progresses, It is unavoidable that the winding tightness phenomenon occurs in the winding core portion and its vicinity. Therefore, the dimensions of the honeycomb body due to foil rupture or deformation of the foil shape,
There is a problem that it is difficult to stably manufacture a honeycomb body of good quality due to an inconvenient phenomenon such as a defective shape.

[0012]

The present invention is particularly applicable to
When a flat foil and a corrugated foil made of a metal foil with a thickness of 40 μm are stacked and a rolled-up metal honeycomb body is manufactured, winding tightness is prevented in a small diameter region, and a honeycomb body with high dimensional accuracy and stable quality can be obtained. A method of winding a metal honeycomb body is provided.

[0013]

According to the present invention, winding tightness is most likely to occur when a rolled-up metal shaft and a pair of side clamps are used to manufacture a rolled-up metal honeycomb body by laminating a flat metal foil and a corrugated metal foil. In the small diameter region of the winding diameter of 5 to 50 mm, it is wound with a low tension of 0.1 to 0.5 kgf / mm ² , and on the outer peripheral surface of the winding, the inside of the metal corrugated foil and the metal flat surface within a range of 360 degrees in the circumferential direction. The metal corrugated foil and the metal flat foil are fixed by spot welding one or more points each on the outside of the foil, the inside of the flat metal foil, and the outside of the corrugated metal foil.After this fixing, both end faces are pressure-supported by a pair of side clamps. It is a winding method for a metal honeycomb body, characterized in that the winding is carried out with a tension of 0.6 to 5 kgf / mm ² ) higher than the tension in the small diameter region.

The inventors of the present invention can not increase the pressure supporting force by the winding shaft and the pair of clamp bodies due to the winding tightness phenomenon when manufacturing a honeycomb body having a diameter of 50 to 150 mm.
We obtained the finding that it is most likely to occur in a small diameter area of 5 to 50 mm in the process of winding a flat metal foil and a metal corrugated foil with a thin foil of ~ 40 μm, and at least suppress the occurrence of winding tightening phenomenon in this small diameter area. The method of doing so was examined, and it was concluded that the present invention is effective.

In the present invention, when a thin metal flat foil and a metal corrugated foil are superposed on each other to manufacture a rolled-up metal honeycomb body, at least a winding diameter at which winding tightness is likely to occur is 5
Low tension 0.1 to 0.5 kgf / mm up to small diameter area up to 50 mm
Roll it up to ² , and fix the metal corrugated foil and the metal flat foil by spot welding the outer peripheral surface here, and then press and support the end surface of the honeycomb body with a pair of side clamps to maintain the tension of 0.6 to 5 kg.
Raise to f / mm ² and wind. Here, unless the tension is increased, a sufficient winding density cannot be obtained.

By so doing, the occurrence of winding tightness is suppressed while securing a sufficient pressure supporting force, and the flat metal foil and the corrugated metal foil are prevented from being broken and the shape of the metal foil is prevented from being defective. It is possible to stably secure dimensional accuracy, shape characteristics, and structural characteristics and stabilize quality.

The spot welding in the present invention may be carried out each time each layer is formed or when a predetermined number of turns is reached, but in consideration of its effect and efficiency, the take-up diameter at which winding tightening is likely to occur is 25. It suffices to carry out at the time when the winding of the small diameter region of ˜40 mm has passed.

However, when the diameter of the honeycomb body is 100 mm or more, there is a concern that a winding tightening phenomenon may occur in the intermediate region. Therefore, if there is such a concern, spot welding is similarly performed in the intermediate region. Then, it is considered that the metal corrugated foil and the metal flat foil are fixed also in this intermediate region, and the end face of the honeycomb body is pressure-supported by a pair of side clamps to raise the tension to wind it.

Since this spot welding is carried out to fix the diameter of the small diameter region, it suffices if the flat metal foil and the corrugated metal foil can be fixed, but one point cannot sufficiently prevent winding tightening. There is also a concern that the stress will be concentrated and the spot weld will be damaged. Further, if the number of points is too large, the work of spot welding and the cost burden increase.

In order to eliminate such a concern, the inner side of the metal corrugated foil and the flat metal foil are set at 2 to 4 points in the axial direction and 360 degrees in the circumferential direction (preferably 2 points at intervals of half a peak). It is desirable to arrange the outer side, the inner side of the flat metal foil, and the outer side of the metal corrugated foil at 1 point or more, preferably 2 to 4 points in a well-balanced manner.

In the present invention, after the metal corrugated foil and the flat metal foil are fixed by spot welding, the end faces are pressure-supported by a pair of clamp bodies, and the tension (0.6 to 6) is larger than the tension in the small diameter region. (5 kgf / mm ² ), which is wound up by a pair of side clamps to secure a sufficient pressure supporting force to both end faces of the honeycomb body, and at the same time to uniformly distribute the pressure supporting force distribution to increase the winding force. This is because the dimensional accuracy and shape characteristics of the honeycomb body are secured by ensuring the stability.

Since spot welding is carried out at the contact portion between the valley portion of the corrugated foil and the flat foil, and at the contact portion between the flat foil and the corrugated portion of the corrugated foil, the tip of the torch of the spot welding apparatus is attached to this contact portion. Since it is necessary to align the positions, in order to automate this spot welding, the winding number measuring means, the means for detecting the contact portion, and the torch are moved to the contact portion based on the information from the detecting means (advancing / retreating, turning). It is necessary to arrange an automatic spot welding device that combines the means for doing so. However, since there is no effect even if the spot welding position is slightly shifted, if the workability of the spot welding can be tolerated to some extent, even if the position is visually determined and the spot welding is manually performed, The purpose can be achieved.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described conceptually with reference to FIGS. In this example, the metal flat foil and the metal corrugated foil are overlapped and wound, and the present invention is applied to the case of manufacturing a metal honeycomb body. Here, the metal corrugated foil is one side of the winding device. From the opposite side of the metal corrugated foil to the lower side.

In FIG. 1, a flat metal foil and a metal corrugated foil are superposed and wound, and when a predetermined winding diameter is reached, a pair of upper and lower welding devices are arranged on the outer peripheral surface of the winding to perform spot welding. Then, the state in which the metal corrugated foil and the metal flat foil are fixed by spot welding the inside of the metal corrugated foil and the outside of the metal corrugated foil and the inside of the metal flat foil and the outside of the metal corrugated foil are shown.

In FIG. 1, a winding device 9a is a welding torch of a welding device which is arranged above the metal honeycomb body 4a in the winding process, and the tip position of the welding torch is wound by a driving device and an elevating device (not shown). The position can be adjusted by the winding device with respect to the outer peripheral surface of the metal honeycomb body 4a in the winding process.

Reference numeral 9b denotes a winding device, which is a welding torch of a welding device disposed below the metal honeycomb body 4a in the winding process, and the tip position of the welding torch is set by a driving device and a lifting device (not shown). The position can be adjusted with respect to the outer peripheral surface of the metal honeycomb body 4a in the winding process.

Welding torch 9 of the pair of upper and lower welding devices
Spot welding by a and 9b will be briefly described with reference to FIGS. 1 and 2. Here, the tip of the welding torch 9a is located in the valley of the corrugated foil 2 at the contact start portion between the outer surface of the flat foil 1 and the corrugated foil 2, and the tip of the welding torch 9b is located from the tip position of the welding torch 9a to the honeycomb. It is positioned at the contact point between the inner surface of the flat foil 1 and the corrugated foil 2 at the contact start portion between the outer surface (mountain) of the corrugated foil 2 and the inner surface of the flat foil 1 at a position approximately 180 degrees apart in the circumferential direction of the body.

In this example, the spot welding by the welding torches 9a and 9b is performed when the winding of the flat metal foil 1 and the corrugated metal foil 2 is started by the winding device and the winding diameter reaches D1. There is. That is, when the winding diameter reaches D1, the winding is stopped at the position shown in FIG. 1, and the tip of the welding torch is moved to a predetermined position (points A and B) by a driving device and a lifting device (not shown). Spot) and perform spot welding.

First, as shown in FIG. 2A, after the spot welding of the point A by the welding torch 9a, the welding torch 9a is formed.
To a position where it does not interfere with the metal honeycomb body 4a,
Flat metal foil 1 until the spot weld of the spot turns about half a turn
And the metal corrugated foil 2 are rewound, and the spot welding portion at the point A is at a position as shown in FIG. 2 (b) ((180-θ from the spot welding position by the welding torch 7a (θ is determined by the winding diameter r)). } Will be stopped again.

At this position, spot welding of point B is performed by the welding torch 9b. After spot welding, welding torch 9b
Is retracted to a position where it does not interfere with the metal honeycomb body 4a.

In this way, the tip ends of the welding torches 9a and 9b are arranged at predetermined positions, and spot welding is performed on the outer periphery of the metal honeycomb body 4o during the winding process, so that the inside of the metal corrugated foil 2 and the outside of the flat metal foil 1 are joined. The metal corrugated foil 2 and the metal flat foil 1 are fixed at the contact point A and the contact point B between the inner side of the metal flat foil 1 and the outer side of the metal corrugated foil 2.

After fixing, the welding torch is retracted to a position where it does not interfere with the metal honeycomb body 4a by a driving device and an elevating device (not shown), and the pair of side clamps 6a and 6b is moved by a hydraulic mechanism (not shown). The metal honeycomb body 4 is manufactured by moving the metal honeycomb body 4a to the end face side to support (press) it under pressure, wind it with a slightly increased tension.

As described above, when a flat metal foil and a flat metal foil are stacked to manufacture a roll-up metal honeycomb body, the flat metal foil and the flat metal foil are once spot-welded in a roll-up diameter region where winding tightness is likely to occur. After fixing, both ends are pressure-supported by the side clamps, and the tension is increased to wind up to suppress the occurrence of tightening while securing sufficient pressure holding force by the side clamps. It is possible to prevent breakage of the foil and occurrence of defective shape, to stably secure the dimensional accuracy, shape characteristics, and structural characteristics of the obtained metal honeycomb body and stabilize the quality.

The present invention is not limited to the above embodiment. For example, the structure and drive control mechanism of the winding device,
For the supply direction of flat metal foil and corrugated foil, tension control mechanism, structure and drive control mechanism of spot welding equipment, welding method, number of welding points, welding point arrangement, etc., thickness of metal foil, diameter of metal honeycomb body, etc. It is intended to be changed within the scope of satisfying the claims.

[0035]

EXAMPLES The present invention was applied to the winding method shown in FIGS. 1 and 2, and a flat foil and a corrugated foil made of a stainless steel foil having a thickness of 30 μm were wound up in an overlapping manner to manufacture a metal honeycomb body having a diameter of 90 mm. I went. The result will be described together with the result of the conventional example.

"Experimental conditions" Flat foil width: 100 mm Corrugated foil width: 100 mm, wave height: 1.25 mm, wave pitch: 2.5
mm Winding tension (1) Up to winding diameter of 30 mm: 0.2 kgf / mm ² (2) Winding diameter of 30 mm or later: 2 kgf / mm ² Spot welding Welding point arrangement 2 points in the axial direction (interval 50 mm) 2 in the circumferential direction Point (Point A, Point B θ = 4.8 degrees) Side clamp effective diameter: 200 mm Pressing force (1) Winding diameter after 300 mm: 300 kg

In the embodiment of the present invention, the winding diameter is 30 mm after the winding shaft is rotated and the winding is started to form the winding core.
Then, spot welding of two points in the axial direction and two points in the circumferential direction was performed by a pair of upper and lower welding machines on the outer peripheral surface of the honeycomb body in the winding process, and the outer surface of the metal flat foil and the metal corrugated foil were welded. After fixing the inner side and the inner surface of the flat metal foil to the outer side of the metal corrugated foil, both ends were pressed and supported by side clamps to increase tension and the side clamps were rotated to wind the metal honeycomb body.

When the dimensions (peripheral length) and the shape of the obtained metal honeycomb body were examined, the dimensions were within a permissible error (± 1 mm) with respect to the predetermined dimensions, and the foil at the end portions was measured. The occurrence of inconvenient phenomena such as buckling, uneven edge, wave height of corrugated foil in each layer, uneven distribution of pitch, foil breakage, and the like, which impair quality, was not observed.

On the other hand, after fixing the outer surface of the metal flat foil and the inner surface of the metal corrugated foil, and the inner surface of the metal flat foil and the outer surface of the metal corrugated foil, they are wound without increasing the tension to produce a metal honeycomb body. In the comparative example, satisfactory results were not obtained in dimensional accuracy and shape characteristics.

Further, in the metal honeycomb body obtained by the conventional example in which the metal flat foil and the metal corrugated foil are not fixed by spot welding in the winding process, the dimension is within an allowable error (± 1 mm) with respect to the predetermined dimension. In many cases, foil buckling at the edges, uneven edges, corrugated height of each layer, uneven distribution of pitch changes, foil breakage, and other inconvenient phenomena that impair quality Was also recognized.

[0041]

In the present invention, when the flat metal foil and the corrugated metal foil are superposed and wound to form a honeycomb body, the flat core and the corrugated foil are wound after the winding core portion is wound with low tension. Since winding tightness does not occur because it is fixed by spot welding and winding is continued, breakage of metal flat foil, metal corrugated foil, prevention of occurrence of shape defect, dimensional accuracy, shape characteristics of the obtained metal honeycomb body, It is possible to secure stable structural characteristics and stabilize quality.

[Brief description of the drawings]

FIG. 1 is a schematic front view showing an example of spot welding of a metal honeycomb body according to an embodiment of the present invention.

2A and 2B are front schematic explanatory views showing an example of spot welding point arrangement in an embodiment of the present invention, FIG. 2A is a partially enlarged explanatory view showing point A, and FIG. 2B is a positional relationship between points A and B. Partly enlarged explanatory diagram showing

FIG. 3 is a three-dimensional schematic explanatory view showing an example of a known method of winding a metal honeycomb body.

FIG. 4 is a schematic front view showing a known example of a metal honeycomb body.

FIG. 5 is a schematic front view showing an example of a conventional winding device for a metal honeycomb body.

FIG. 6 is a side cross-sectional partial schematic explanatory view showing a structural example for forming a winding core portion in a conventional winding device for a metal honeycomb body.

[Explanation of symbols]

 1 Metal Flat Foil 2 Metal Corrugated Foil 3 Casing 4 Metal Honeycomb Body 4a Metal Honeycomb Body (Wind Core) 4o Through Hole 5 Winding Shaft 6a, 6b Side Clamps 7a, 7b, 7c Crimping Roll 8 Driving Device 9a , 9b, 9c welding torch

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Toru Utsumi 5-3 Tokai-cho, Tokai-shi, Aichi Nippon Steel Co., Ltd. Nagoya Steel Works

Claims (1)

[Claims] 1. When manufacturing a rolled-up metal honeycomb body by laminating a metal flat foil and a metal corrugated foil using a winding shaft and a pair of side clamps, a winding diameter at which winding tightness is most likely to occur is 5 to 50 mm. Low tension 0.1-0.5kg in the small diameter area
Winding at f / mm ² , and at the outer circumferential surface of the winding, at least one point inside the metal corrugated foil and outside the metal flat foil, and inside the metal corrugated foil and outside the metal corrugated foil within 360 ° in the circumferential direction. Fix the metal corrugated foil and the flat metal foil by spot welding, and after fixing, support both ends by pressure with a pair of side clamps and wind with a tension of 0.6 to 5 kgf / mm ² which is higher than the tension of the small diameter area. A method for winding a metal honeycomb body, comprising: