KR100188225B1 - Corrugated metallic carriers for purifying exhaust gases - Google Patents

Abstract

In the present invention, the corrugated plate used as a part for manufacturing a catalytic metal carrier for purification of exhaust gas is formed into a trapezoid shape, so that it can be easily formed into a metal carrier and the residual stress is removed and the catalyst chart area for the metal carrier is maximized To a corrugated plate forming method capable of forming a corrugated plate.

Further, the present invention can freely adjust the tension of the flat plate and the corrugated plate when the flat plate and the corrugated plate are rolled and formed into a metal carrier, so that the metal support can have excellent bonding properties in a subsequent brazing step And more particularly, to a catalyst metal carrier forming apparatus for gas purification. A metal carrier forming apparatus according to the present invention is an apparatus for forming a flat carrier and a corrugated carbon carrier into a metal carrier for exhaust gas purifying catalyst by superimposing and winding flat and corrugated carbon. The apparatus includes a clip shaft (18) A plurality of guide grooves 14a and 14d are radially formed in the peripheral portion of the shaft and spring support rods 24a to 24d of the same number as the guide grooves are fixedly installed in the vicinity of the distal end And a spring 26a-26d fixed to the cylinder support 25a, 25d and fixed to the spring support base at a rear portion of the cylinder guide 25a, And a plurality of pneumatic cylinders (12a-12d) rotatably connected to rollers (28a-28d) in contact with the flat plate at a front portion thereof.

Description

METHOD FOR FORMING WAVEFORM PLATE AND METHOD FOR FORMING SUBSTRATE FOR PRODUCING CATALYST METAL SUPPORT FOR EXHAUST GAS PURIFICATION

More particularly, the present invention relates to a corrugated plate forming method for manufacturing a metal carrier capable of securing a large catalyst area, and a method of forming a corrugated plate by forming a flat plate and a corrugated plate on each other, To an apparatus for forming the same.

Conventionally, ceramics are mainly used as a catalyst carrier for purification of exhaust gas of automobiles. However, recent application of a catalyst has a larger application area and faster heating rate than a ceramic carrier, and the back pressure of the exhaust gas is small, so that the engine efficiency is high, And Fe-Cr-Al-based metal supports, which have various advantages such as high mechanical strength and excellent properties.

In order to produce such a metal carrier, a thin plate of an Fe-Cr-Al-based alloy having a thickness of 50 占 퐉 or less is first prepared, the thin plate is bent and formed to form a corrugated plate, And then housed in a metal outer tube, and the outer tube is integrally joined to the flat plate, corrugated plate and metal by brazing.

On the surface of the passage of the metal carrier thus produced, a catalytic attack layer made of alumina or the like is laminated by coating, and a noble metal catalyst is carried on the catalyst supporting layer, thereby forming an exhaust gas purifying catalyst.

The exhaust gas purifying catalyst thus formed is used as a three-way catalyst for purifying HC, CO, NOx and the like in the exhaust gas to the exhaust passage.

Further, in manufacturing such a metal carrier, it is desirable to secure as much honeycomb passageway as possible within a predetermined volume, so that the thickness of the flat plate and the corrugated plate must be as small as possible within a range in which the strength can be maintained. In order to form the corrugated plate used as a part for manufacturing such a metal carrier, conventionally, as shown in Fig. 1 (a), which schematically shows a cross section of the corrugated plate forming roll, Shaped roll 10 having a rounded end portion was used.

However, in the case of forming the flat thin plate into the corrugated plate by using the triangular forming roll shown in FIG. 1, since the thin plate is very thin as about 50 탆, the corrugated plate The plate is distorted and the productivity is lowered.

On the other hand, in order to manufacture a honeycomb-shaped metal carrier by winding a flat plate and a corrugated plate over one another, conventionally, by adjusting the torque in a motor wound on a corrugated roll, A method of superimposing a flat plate and a corrugated plate by tension was used. However, such a conventional method has a problem that it is difficult to wind the flat plate and the corrugated plate at a desired tension, resulting in defective joining in a subsequent brazing process.

Further, there is a problem that the shape of the metal carrier wound in the honeycomb shape may be disturbed when taken out.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above problems, and it is an object of the present invention to provide a method of forming a corrugated plate for manufacturing a metal carrier, in which the corrugation phenomenon is prevented in the process of winding the corrugated sheet.

It is another object of the present invention to provide a method of manufacturing a metal plate, which is capable of winding a flat plate and a corrugated plate at a desired tension so as to obtain excellent bonding characteristics in a subsequent brazing process, And a metal carrier forming apparatus for a gas purifying catalyst.

Fig. 1 (a) is a schematic cross-sectional view of a triangular section forming roll used for forming a conventional corrugated plate.

(b) is a schematic cross-sectional view of a corrugated plate forming roll for explaining a corrugated plate forming method according to an embodiment of the present invention.

Fig. 2 (a) is a plan view of a catalyst metal carrier forming apparatus for purifying exhaust gases according to an embodiment of the present invention. Fig.

(b) is a side view of the device according to (a).

DESCRIPTION OF THE REFERENCE NUMERALS

1: Metal carrier forming apparatus 10: Triangular shaped forming roll

10a: Trapezoidal shaping roll 11: Base

12a-12d: pneumatic cylinder 13: motor

14a-14d: cylinder guide groove 15: through hole

16: corrugated sheet take-up roll 17: flat plate take-

18: clip type shaft 19: groove for mounting the guider

21: flat plate 22; Wave plate

23: metal carrier guider 24a-24d: spring support

25a-25d: pneumatic cylinder 26a-26d: spring

27a-27d: roller support 28a-28d: roller

29: Touch bar 31: Limiter switch

32: metal carrier 33: tension roller

34: Metal extruder

According to a first aspect of the present invention, there is provided a method of forming a corrugated plate used as a component for manufacturing an exhaust gas purifying catalyst metal carrier, comprising the steps of: forming a trapezoid Wherein the ultrathin plate is formed by the wave shape of the wave plate. Further, the present invention provides, as a second aspect, an apparatus for forming a flat plate and a corrugated plate in a rolled-up manner to form a catalytic metal carrier for exhaust gas purification, characterized in that the flat plate and the corrugated plate are fixed to the central portion of the upper surface, A base having a plurality of guide grooves radially formed at the periphery of the shaft and having a number of spring supports fixed to the distal end close to the guide grooves and capable of moving back and forth along the guide grooves; And a plurality of pneumatic cylinders which are fixedly mounted on a cylinder guide to be installed and to which a spring fixed to the spring support is connected to the rear portion and a roller which is in contact with the flat plate is rotatably connected to the front portion, Wherein the exhaust gas purifying catalyst metal carrier forming apparatus comprises:

Preferably, the apparatus for shaping a catalytic metal carrier for purification of exhaust gas according to the present invention further comprises a metal carrier guider inserted in the shafts and detachably mounted on the upper surface of the base between the shaft and the guide grooves.

The catalytic metal carrier forming apparatus for purifying exhaust gases according to the present invention further comprises metal carrier diameter adjusting means comprising a touch bar mounted on the pneumatic cylinder and a limiter switch movable back and forth at a linear position coinciding with the touch bar .

Hereinafter, a waveform shaping method for producing a metal carrier of the present invention will be described.

1 (b) is a schematic cross-sectional view of a corrugated plate forming roll for explaining a corrugated plate forming method according to an embodiment of the present invention. Referring to Fig. 1 (b), the corrugate plate forming roll 10a is processed into a trapezoidal cross-sectional shape. The contact portion where the sides and sides meet in the trapezoidal shaped machining portion is rounded.

When a thin plate is formed by using such a trapezoidal forming roll, a corrugated plate having the same sectional shape as the forming roll is obtained.

Such a trapezoidal corrugated plate has a trapezoidal shape, so that the plate and the corrugated plate are not collapsed during the process of winding the corrugated plate into a bail-like shape. When the plate and the corrugated plate are joined by brazing, It is bonded to the plate in semicircular form.

Therefore, since the contact area between the flat plate and the corrugated plate decreases again after brazing, the surface area of the metal support which can be in contact with the exhaust gas as a whole increases and becomes strong against thermal stress, .

The present invention also relates to an apparatus for superimposing a flat plate and a corrugated plate in a rolled metal carrier. Therefore, a catalyst metal carrier forming apparatus for purifying exhaust gas according to an embodiment of the present invention will be described in detail with reference to FIGS. 2 (a) and 2 (b).

Fig. 2 (a) is a plan view of the catalyst metal carrier forming apparatus for purifying exhaust gases, and Fig. 2 (b) is a side view of the apparatus according to Fig.

Referring to FIGS. 2 (a) and 2 (b), there is shown a catalytic metal carrier molding apparatus for purifying exhaust gases according to an embodiment of the present invention, A pneumatic cylinder 12a-12d movably mounted on the upper portion of the base 11, and a pneumatic cylinder 12a-12d attached to a lower portion of the base 11, And a motor 13 for winding the flat plate 21 and the corrugated plate 22 therebetween.

A through hole 15 is formed in a central portion of the base 11 and a plate 21 and a corrugated plate 22 from the corrugated plate take-up roll 16 and the flat plate take- And a clip shaft 18 for winding in a metal carrier shape is inserted and connected to a motor 13 attached to the lower surface of the base 11. [

Although not shown, the clip-type shaft 18 fixes the initial end portions of the flat plate 21 and the corrugated plate 22 so as to be wound in the form of a metal carrier according to the rotation of the motor 13, And a groove 19 is formed in the peripheral portion of the through hole 15 in the upper surface of the base 11 so that a through hole is formed in the groove 19, The guider 23 is detachably attached while being inserted into the clip-type shaft 18 and fastened by fastening means (not shown) such as a bolt or the like.

Guide grooves 14a and 14b for guiding the pneumatic cylinders 12a to 12d are formed on the upper surface of the base 11 at the peripheral portion of the groove 19.

Although four guide grooves are formed in the base 11 in accordance with the four pneumatic cylinders 12a-12d in the metal carrier molding apparatus of the present embodiment, only two guide grooves 14a and 14b Respectively. Spring supports 24a-24d are vertically fixed to the upper surface of the proximal end of the base 11.

On the other hand, pneumatic cylinders 12a to 12d are disposed on the upper portion of the base 11, and these pneumatic cylinders 12a to 12d are inserted into the guide grooves 14a and 14b described in the upper part of the figure, Respectively, to the pneumatic cylinder guiders 25a and 25b. Here, although the metal carrier forming apparatus 1 has four pneumatic cylinder guiders in correspondence with the four pneumatic cylinders 12a to 12d, only two pneumatic cylinder guiders 25a and 25b are shown in the drawing, have.

Springs 26a-26d are attached to the rear of the pneumatic cylinders 12a-12d, respectively, and the springs 26a-26d are fixed to the spring supports 24a-24d, respectively. Roller supports 27a to 27d each having a substantially L-shaped cross section are attached to the rod ends of the front portions of the pneumatic cylinders 12a to 12d. (28a-28d) which is in contact with the outer surface of the roller (21) is rotatably fixed.

On the other hand, in order to adjust the diameter of the metal carrier 34 formed by overlapping the flat plate 21 and the corrugated plate 22, a touch bar 28 is attached to a side portion of the pneumatic cylinder 12a And a limiter switch 31 is provided so as to be movable back and forth at a position immediately before the touch bar 29 coincides with the touch bar 29.

The limiter switch 31 is electrically connected to the motor 13 so as to stop the driving of the motor 13 by generating a signal when the touch bar 29 is in contact with the limiter switch 31 have.

Reference numeral 34 denotes a metal outer tube for accommodating the metal carrier 32 wound and formed. The operation of the metal carrier molding apparatus 1 having the above-described structure will be described below.

When the metal carrier 32 is to be formed by using the metal carrier forming apparatus 1, the flat plate 21 and the corrugated plate 22 are first loosened from the flat plate take-up roll 17 and the corrugated plate take- And the first end portion is fixed to the clip-type shaft 18 after passing through the tension roller 33. [ Then, the limiter switch 31 is moved corresponding to the diameter of the metal carrier to be formed and fixed at a desired position, and then the rod portion of the pneumatic cylinders 12a to 12d is advanced to move the rollers 28a to 28d to the fixed plate 21 and the portion of the corrugated plate 22.

Then, the motor 13 is driven at a controlled speed, and the plate 21 and the corrugated plate 22 are wound on the clip-type shaft 18 by the rotation of the clip-type shaft 18. [

At this time, since the wound flat plate 21 and the corrugated plate 22 are wound with constant tension by the rollers 28a-28d at the front part of the pneumatic cylinders 12a-12d and the springs 26a-26d at the rear part, The bonding properties are improved in the brazing process, which is a manufacturing process.

The pneumatic cylinders 12a to 12d are retracted toward the spring supports 24a to 24d as the flat plate 21 and the corrugated plate 22 are continuously wound as the clip type shaft 18 is rotated by the driving of the motor 13 When the touch bar 29 attached to the pneumatic cylinder 12a contacts the limiter switch 31, the motor 13 automatically stops driving by the electrical signal of the limiter switch 31.

The pneumatic cylinders 12a to 12d are then contracted to separate the rollers 28a to 28d from the surface of the molded metal carrier 32 and then the plate 21 and the corrugated plate 22 are cut with a knife And the outer cylinder 34 is sandwiched between the formed metal carrier 32.

The metal carrier guider 23 is then disassembled from the base 11 and separated from the metal carrier molding apparatus 1 together with the outer cylinder 34 in which the metal carrier 32 is housed.

At this time, since the metal carrier 32 is taken out together with the guider 23, the metal carrier 32 is not disturbed.

The metal carrier 32 thus separated is carried to the brazing process while being accommodated in the outer cylinder 34.

While the present invention has been particularly shown and described with reference to preferred embodiments thereof, it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention.

INDUSTRIAL APPLICABILITY As described above, the corrugated sheet formed by the corrugated sheet forming method according to the present invention can prevent the occurrence of a distorted shape in the subsequent step of winding the corrugated sheet into a carrier shape, thereby improving the productivity.

On the other hand, in the catalyst metal carrier forming apparatus for the purification of exhaust gas according to the present invention, it is possible to freely adjust the tension of the flat plate and the corrugated plate by means of a pneumatic cylinder, In addition, when the metal carrier is taken out by the metal carrier guider, the metal carrier can be accurately housed in the outer tube without disturbance.

Claims (4)

A method of forming a corrugated plate for use as a component for manufacturing a catalytic metal carrier for purification of exhaust gas, characterized in that the corrugated sheet is formed by a corrugated cross section in which the contact portion of the corrugated sheet is rounded. An apparatus for forming a flat plate and a corrugated plate by winding them over and forming them into a catalytic metal carrier for purification of exhaust gas, characterized in that a clip type shaft (18) for winding the flat plate and the corrugated plate A base 11 in which a plurality of guide grooves 14a and 14d are radially formed at the peripheral portion of the guide groove 24a and 24d and the same number of spring supports 24a to 24d as the guide grooves are fixed to the distal end portion, 25d fixed to the cylinder guides 25a, 25d so as to be able to move forward and backward along the guide rails 26a-26d, Characterized in that the rollers (28a-28d) are rotatably connected and provided with a plurality of pneumatic cylinders (12a-12d) . 3. The apparatus of claim 2, further comprising a metal carrier guider (23) inserted into the shaft and detachably mounted on the upper surface of the base between the shaft and the guide groove. 3. The apparatus according to claim 2, further comprising metal carrier diameter adjusting means comprising a touch bar (29) attached to the pneumatic cylinder and a limiter switch (31) movable back and forth at a straight line position coinciding with the touch bar Characterized in that.