JPH08164432A - Short tube diameter reducing device - Google Patents

Abstract

(57) [Abstract] [Object] The present invention provides, for example, in the case of manufacturing a short tubular metal carrier in which a honeycomb body is inserted in a metal cylinder, the metal cylinder is maintained at low cost and high productivity. (EN) Provided is a short tube diameter reducing device which is easy to automate, in which a honeycomb body is inserted and firmly integrated to manufacture a short tube such as a metal carrier having good roundness and dimensional accuracy. According to the present invention, there is provided a push-up mechanism having a mounting table at an upper end thereof and a drive device for moving the table up and down, a guide body having an inverted conical guide hole disposed above the push-up mechanism, A plurality of tapered segments, which are continuously provided on the tapered surface of the guide hole of the guide body in the circumferential direction via a spring, whose inner diameter can be expanded and contracted, and which can insert and hold a short tube on the mounting table, It is characterized in that it is provided with a push-down mechanism which is provided above the tapered segment and has a push-down jig at the lower end portion and a drive device for moving the push-up jig up and down.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention, in a state in which a core is inserted in a short pipe, presses the outer peripheral surface of the short pipe from the outside to reduce the short pipe into a true cylinder, and The present invention relates to a short tube diameter reducing device that firmly integrates a core.

[0002]

2. Description of the Related Art For example, as a catalyst for purifying automobile exhaust gas in recent years, a metal flat foil and a corrugated foil are superposed and wound as shown in FIG. 4, and have a large number of through holes in the winding axial direction. A metal carrier c is used in which a short tubular honeycomb body a is manufactured, and the honeycomb body a is fitted and bonded into a metal tube b having substantially the same length as the honeycomb body a. Conventionally, as a method of fitting and integrating this honeycomb body in a metal cylinder, a metal cylinder b
There is a method in which the diameter of the honeycomb body a is made smaller than the outer shape of the honeycomb body a by 2 to 3% and the honeycomb body a is pushed into the metal cylinder b to be integrated.

In this method, only the honeycomb body a can be reduced in diameter and press-fitted into the metal cylinder b to be integrated. However, in this method, since the outer diameter of the honeycomb body is appropriately reduced and press-fitted, it causes a decrease in yield at present. Further, it is necessary to manufacture the outer cylinder with high accuracy (roundness), which results in high processing costs such as perfect circle processing and chamfering of the end face.

As a means for solving such a problem,
For example, Japanese Patent Laid-Open No. 14747/1990 proposes a method in which a roller die or a die is used to insert a honeycomb body into a metal cylinder, and the outer periphery of the metal cylinder is squeezed to be integrated. However, this method cannot be said to have high suitability when the diameter of a short tubular member such as a metal carrier in which a honeycomb body is inserted is to be reduced.

The reason is that it is difficult to hold the metal cylinder and the honeycomb body when the diameter is reduced. However, since the diameter reduction progresses with time from the front end to the rear end instead of the simultaneous diameter reduction, even if the diameter is reduced, the shape is likely to change due to the diameter reduction processing of the next portion. Therefore, the shape (roundness, dimensional accuracy) of the metal carrier after the completion of the diameter reduction tends to be unstable. Etc.

[0006]

DISCLOSURE OF THE INVENTION The present invention is, for example, for producing a short tubular metal carrier in which a honeycomb body is inserted in a metal cylinder, while maintaining low cost and high productivity while maintaining the metal cylinder. (EN) A short tube diameter reducing device for manufacturing a short tube such as a metal carrier having good roundness and dimensional accuracy by inserting and firmly integrating a honeycomb body therein.

[0007]

The first invention of the present invention is as follows:
A push-up mechanism having a mounting table at the upper end and a drive device for moving the table up and down, a guide body having an inverted conical guide hole disposed above the push-up mechanism, and a taper of the guide hole of the guide body. A plurality of tapered segments, which are connected to the surface in the circumferential direction via a spring, whose inner diameter is expandable and contractible, can insert and hold the short tubes on the mounting table, and are arranged above these tapered segments. A short tube diameter reducing device, characterized in that it is provided with a push-down mechanism having a push-down jig which is provided at a lower end thereof and moves the push-up jig up and down.

According to a second aspect of the present invention, a movable body in which a plurality of mounting bases are detachably fitted at intervals is movably arranged in an endless manner, and the movable body is moved at a constant speed so that a plurality of mounting stages can be mounted. Stop the mounting table at a plurality of work stations for a predetermined time, and use a transfer device at each station to set a short tube on the mounting table.
It is characterized in that the core insertion into the short pipe, the short pipe diameter reduction by the short pipe diameter reducing device according to claim 1, the removal of the diameter reduction short pipe from the mounting table, etc. are shared at the same time. It is a short tube diameter reducing device.

[0009]

In the present invention, the short tube in which the core to be reduced in diameter is inserted is fitted to the tapered surface of the guide hole of the guide body,
Grasp with a plurality of tapered segments whose back surface is a tapered surface, push down this tapered segment along the tapered surface of the guide hole of the guide body, and by the action of the tapered surface of the guide hole of this guide body, By reducing the inner diameter of the tapered segment, it is possible to simultaneously press the outer peripheral surface of the short tube whose outer peripheral surface is gripped by the segment to reduce the diameter of the short tube. As a result, it is possible to reduce the diameter of the short tube with the core inserted with high accuracy and firmly integrate it.

Further, even if the size of the core inserted into the short pipe is slightly small or the diameter of the short pipe is slightly large, the core is inserted into the short pipe and the diameter thereof is accurately reduced to a short pipe of a predetermined diameter. The short pipe and core can be firmly integrated, and the productivity of diameter reduction work can be improved. Further, it is easy to automate the diameter reduction of the short pipe and its related work, and it is possible to save labor and improve the productivity of the diameter reduction and its related work.

[0011]

EXAMPLES The present invention will be described below based on examples shown in FIGS. 1 (a) to 1 (d). This example is used to obtain a metal carrier used as a catalyst for purifying exhaust gas of an automobile, in which a honeycomb body (core) is inserted into an outer cylinder (short tube) and the outer cylinder is reduced in diameter and integrated with the honeycomb body. When applied to.

In FIG. 1, reference numeral 1 is a gantry, and a lower part thereof is provided with a pedestal 2 provided with a centering chuck (not shown), and a push-up mechanism 4 having a hydraulic mechanism 3 for vertically moving the pedestal. . The mounting table 2 includes the hydraulic mechanism 3 of the push-up mechanism 4.
Can be moved vertically and its position can be adjusted.

A guide body 6 having an inverted conical guide hole 6o through which the mounting table can be inserted is provided on the supporting body 5 above the mounting table. Guide hole 6o of this guide body
The tapered surface 6t is fitted with a plurality of tapered segments 7 that are continuously provided along the circumferential direction. Above the tapered segment 7, a push-down mechanism 12 is provided, which is provided with a push-down jig 10 which is attachable / detachable (replaceable) at its lower end and which has a hydraulic mechanism 11 for moving the push-up jig 10 up and down.

A gap 13 is formed between the plurality of tapered segments 7, and a spring 14 is interposed in the gap. The inner diameter D of the short pipe insertion hole 7o formed by the plurality of tapered segments 7 is formed. Can be scaled. That is,
When this tapered segment is pushed down by the pushing jig 10 of the pushing mechanism 12, the taper surface 7t of the back surface of this segment slides on the taper surface 6t of the guide hole 6o of the guide body. It is possible to reduce the diameter of the outer cylinder 9 in which the holes 7o are reduced and the honeycomb body 8 is inserted, together with the honeycomb body 8 in a gripped state. When this pressing down is completed and the pressing jig is pulled up, the inner diameter before pressing down is restored by the action of the spring 14 and the outer cylinder (metal carrier 9s) that has been reduced in diameter and integrated with the honeycomb body 8 can be released. .

In the figure, reference numeral 15 is a holder of the push-up mechanism 4, and 16 is a holder of the push-down mechanism 12, which are slidably engaged with the gantry 1. Reference numeral 17 is a mounting hole for the spring 14 to be interposed between the tapered segments 7.

A diameter reducing operation procedure by the short tube diameter reducing device of the present invention thus constructed will be described with reference to FIG. Prior to the diameter reduction of the outer cylinder 9 into which the honeycomb body 8 is inserted,
Depending on the shape, size, etc. of the outer cylinder and the honeycomb body to be inserted into the outer cylinder in advance, each predetermined element (mounting table 2,
The tapered segment 7, the pressing jig 10 and the like) are selected and mounted, and the operating conditions of the lifting mechanism 4 and the pressing mechanism 12 are set.

Then, the outer cylinder 9 is placed on the mounting table 2, and the outer cylinder 9 is set by aligning it with a centering chuck (not shown). {Fig. (A)} The honeycomb body 8 is inserted into the outer cylinder 9. {(B) figure,
(C) FIG.} The hydraulic mechanism 3 of the push-up mechanism 4 is driven to move the mounting table 2 on which the outer cylinder in which the honeycomb body is inserted is mounted, and to move the outer cylinder 9 on the mounting table to the guide body 6. The lower end of the tapered segment 7 is locked to the mounting table 2 by inserting it into the short tube insertion hole 7o formed in the plurality of tapered segment 7 fitted in the guide hole 6o. {Fig. (D)} The hydraulic segment mechanism 11 of the pressing mechanism is driven to move the pressing jig 10 downward, and the tapered segment 6o is fitted into the guide hole of the guide body through the pressing jig. 7 is pushed down by a distance corresponding to the diameter reduction amount of the outer cylinder 9. At this time, the mounting table 2 is pushed down by a distance (y) necessary for reducing the diameter. The pressing distance (y) is equal to the taper surface 6 of the guide hole 6o of the guide body.
It is determined by the relationship between the tilt angle θ of t and the diameter reduction amount (x × 2) of the outer cylinder 6. {Fig. (E)} The hydraulic mechanism 11 of the push-down mechanism is driven to retract the push-down jig 10 upward, and the hydraulic mechanism 4 of the push-up mechanism is driven to move the mounting table 2 upward so that the spring 14 acts. By expanding the short tube insertion hole 7o by the tapered segment,
The grip of the honeycomb body 8 is released. {Fig. (F)} The hydraulic mechanism 3 of the push-up mechanism is driven to lower the mounting table 2 to the mounting position of the outer cylinder, and the outer cylinder (metal carrier) 9s reduced in diameter and integrated with the inserted honeycomb body 8 is inserted. , Remove from the mounting table 2. {(G) figure} This embodiment shows an example of the main configuration of the diameter-reducing mechanism of the short tube diameter-reducing device of the present invention and an example of its operating procedure. These operations can be performed manually or automatically. Is. Therefore, the present invention is not limited to the above embodiment, but the structure, mechanism, operation procedure, etc. are modified within the scope of claim 1.

FIG. 3 conceptually shows an arrangement example of a device for automating the operation of the short tube diameter reducing device of the present invention. In this example, based on the short tube diameter reducing device of FIG. 1, a plurality of mounting bases 2 are removably disposed at intervals on the base, and a revolving table 18 revolving by a drive motor 19 is used.
(Moving bodies) are connected in series, and the swivel table is swung (moved endlessly) at a predetermined speed, and the four mounting tables 2 are simultaneously moved at the four work stations A, B, C, D for a predetermined time. Stop the robots M1 and M at each station during the stop.
2, M3 (transfer device) and the short tube diameter reducing device of FIG. 1 are used to simultaneously share the above-mentioned operations (1) to (3).

Here, the outer cylinder carrying-in device C1, the honeycomb body carrying-in device C2, and the carrying-out device C3 for reducing the diameter of the outer cylinder 9 and the honeycomb body 8 and integrating the metal carrier 9s are incorporated in the robot M1.
By interlocking with M3, the push-up mechanism 4, and the push-down mechanism 12, it is easy to automate the above work.

In FIG. 3 (a), the case where the diameter reduction work is completed and the work tasks are simultaneously carried out at each work station is explained. Station A is a case where the outer cylinder 9 is set on the mounting table 2 and the outer cylinder 9
The carrying-in device C1 of (1) is closely arranged, and the outer cylinder 9 carried in by the carrying-in device is grabbed by the robot and set on the mounting table 2 stopped at this station.

In the B station, the honeycomb body 8 is inserted into the outer cylinder 9 set on the mounting table 2, and the carry-in device C2 for the honeycomb body 8 is arranged in the vicinity thereof. Is picked up by the robot M2 and inserted into the outer cylinder 9 set on the mounting table 2 stopped at this station.

In the C station, the outer cylinder into which the honeycomb body 8 is inserted is reduced in diameter and integrated with the honeycomb body 8. The mounting table 2 corresponds to the mounting table 2 of the short tube diameter reducing device shown in FIG. (However, here, the mounting table 2 is fitted with the tip of the hydraulic mechanism 3 of the push-up mechanism 4 so that it can be moved up and down by this hydraulic mechanism.) Then, the guide hole 6o of the guide body 6 is tapered. It is located between the tapered segment 7 fitted to the surface 6t and the hydraulic mechanism 3 of the push-up mechanism 4. here,
The hydraulic mechanism 3 is driven to drive the push-up mechanism 4 and the hydraulic mechanism 11 is driven to move the push-down mechanism 12 up and down, respectively, and the outer cylinder 9 and the honeycomb body 8 are reduced in diameter and integrated.

In the station D, an outer cylinder (metal carrier) 9s having a reduced diameter and integrated with the honeycomb body 8 is removed from the mounting table 2 and transferred to the unloading device C3. In this station D, an unloading device C for transporting a reduced diameter outer cylinder (metal carrier) 9s integrated with the honeycomb body 8 to the next step.
3 are arranged close to each other, and the metal carrier 9s on the mounting table 2
Are picked up by the robot M3 and transferred to the carry-out device C3.

The present invention is not limited to the above embodiment, but its structure, mechanism, operating procedure, etc. are modified within the scope of claim 2. For example, in this example, the diameter reduction work is performed only at the station C, but by adding a station and a short pipe diameter reduction device,
The diameter reduction work may be performed in two stages of primary and secondary. In this case, an inspection work process may be provided.

Further, the work stations A, B, C,
Although the number of stations D is four, the station A may be omitted, for example, by loading and unloading the outer cylinder 9 and loading and unloading the metal carrier after the diameter reduction at the station A. Further, although the turning table is used as the moving body, for example, a belt conveyor type moving body may be used. Although the robot is used as the transfer device, a pusher type transfer device may be used, for example.

With such a configuration, the diameter reduction work of the outer cylinder having the honeycomb body inserted therein can be continuously performed by simultaneously sharing the diameter reduction work and its related work at each station.
Therefore, the drive control circuit and the drive condition calculation circuit of the drive mechanism such as the turning table (moving body), the outer cylinder, the honeycomb loading device, the robot (transfer device), the push-up mechanism, the pushing mechanism, and the metal carrier unloading device are provided. The diameter reduction of the outer cylinder and its related work can be easily automated by interlocking and interlockingly controlling each drive mechanism through the arithmetic circuit according to the outer cylinder, the honeycomb body condition, and the diameter reduction condition.

In the above, when purifying the exhaust gas of an automobile,
In order to obtain the metal carrier used as the catalyst, the case where the outer cylinder in which the honeycomb body is inserted is reduced and integrated is described as an example, but the present invention is not applied only to this case, and other It is also applicable to the case of reducing the diameter of the short tubular article.

[0028]

According to the present invention, a short tube having a core to be reduced in diameter is held by a plurality of tapered segments,
Since it is possible to reduce the diameter of the short tube by simultaneously pressing the entire outer circumference through this segment, it is possible to reduce the diameter of the short tube with the core inserted with high accuracy and firmly integrate the short tube and the honeycomb body. . Also, even if the outer diameter of the core that is inserted and integrated into the short pipe is slightly smaller or the inner diameter of the short pipe is slightly larger, the core is inserted into the short pipe and the diameter is reduced to a short pipe of a predetermined diameter. The pipe and core can be firmly integrated, and the productivity of diameter reduction work can be improved. Further, the diameter reduction of the short pipe and the related work can be easily automated, and the labor saving and the productivity of the diameter reduction work and the related work can be improved.

[Brief description of drawings]

1A and 1B are schematic explanatory views showing the structure of an example of a short tube diameter reducing device of the present invention, in which FIG. 1A is a partial front sectional explanatory view, and FIG.
(A) Drawing is a partial cross-sectional side view, (c) is a plan view taken along the line X-X of (a), and (d) is (a) to (c).
3D is a stereoscopic explanatory view of the tapered segment in the drawing. FIG.

FIG. 2 is a partial cross-sectional schematic explanatory view showing an example of a short tube diameter reducing work procedure in the example of the short tube diameter reducing device of the present invention.

FIG. 3 (a) is a plane conceptual explanatory view of the device arrangement in the case of automating the short tube diameter reducing device of the present invention together with the diameter reduction related work, and FIG. 3 (b) is a partial sectional side view conceptual illustration.

FIG. 4 is a three-dimensional schematic explanatory view showing a configuration example of a conventional metal carrier.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Platform 2 Mounting table 3 Hydraulic mechanism 4 Push-up mechanism 5 Support body 6 Guide body 6o Guide hole 6t Tapered surface 7 Tapered segment 7o Short tube insertion hole 7t Tapered surface 8 Honeycomb body 9 Outer cylinder 9s Metal carrier 10 Pressing jig 11 Hydraulic pressure Mechanism 12 Depressing mechanism 13 Gap 14 Spring 15 Holder 16 Holder 17 Spring mounting hole 18 Swivel table 19 Drive motor A, B, C, D Work station C1 Outer cylinder loading device C2 Honeycomb loading device C3 Metal carrier loading device M1, M2 and M3 robots

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Tomoji Munakata 20-1 Shintomi, Futtsu City, Chiba Prefecture Nippon Steel Co., Ltd. Technology Development Division (72) Inventor Hitoshi Ota 5-3 Shinkai, Tokai City, Aichi Prefecture Nippon Steel Co., Ltd. Nagoya Steel Works (72) Inventor Hiroshi Tamaki 2-1-2 Okura, Yawatahigashi-ku, Kitakyushu, Fukuoka Prefecture Yoshikawa Industry Co., Ltd.

Claims (2)

[Claims] 1. A push-up mechanism having a mounting table at an upper end and a drive device for moving the table up and down, and a guide body having an inverted conical guide hole disposed above the push-up mechanism.
A plurality of tapered segments that are continuously provided on the tapered surface of the guide hole of this guide body in the circumferential direction via a spring, have an expandable inner diameter, and can insert and hold a short tube on the mounting table, A short tube diameter-reducing device, which is provided above the tapered segment and has a pushing mechanism having a pushing jig at a lower end portion thereof and a driving device for moving the pushing jig up and down. 2. A movable body in which a plurality of mounting bases are detachably fitted at intervals is movably arranged in an endless manner, and the movable body is moved at a constant speed, and the plurality of mounting bases are moved. 2. Stopping at a working station for a predetermined time, and using a transfer device at each station, setting a short tube on a mounting table, inserting a core into this short tube, reducing the diameter of the short tube by the short tube reducing device of claim 1, A short tube diameter reducing device characterized in that tasks such as removal of a diameter reducing short tube from a mounting table are shared at the same time.