JPH04261720A - Squash/press fitting device - Google Patents

Abstract

PURPOSE:To provide a squash/press fitting device of a honeycomb structure in place of the device where it is difficult to press-fit the honeycomb structure into an outer cylinder only by its press-fitting with a press-fitting head and the popping out of the outermost peripheral foil can not be prevented, in a device for manufacturing a metal carrier for an automobile exhaust gas purifying catalyst of a race track type. CONSTITUTION:The feature is composed of the combination of the squash heads 2, 3, 4 composed by the multistep which squashes a honey comb structure 1 in a race track shape and a clamp 6 restraining the upper end of the squashed honeycomb structure 1. The outermost peripheral foil of the squashed honeycomb structure 1 is restrained by clamping, and is press-fitted by a press fitting head 5 from the upper part, then the press fitting can be executed just as the upper part of the honeycomb structure 1 being aligned, and the carrier having no popping out of the outermost peripheral foil can be manufactured.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crushing and press-fitting device for crushing and press-fitting a cylindrical honeycomb structure in an apparatus for manufacturing a racetrack type metal carrier for an automobile exhaust gas purifying catalyst.

0002

2. Description of the Related Art A metal carrier for an automobile exhaust gas purification catalyst is composed of a honeycomb structure formed into a honeycomb shape with layers of alternating flat foils and corrugated foils, and a metal outer cylinder. As a manufacturing device, in order to create a joint with as little gap as possible between the honeycomb structure and the outer cylinder that holds it, a honeycomb structure larger than the finished product size is stored in the outer cylinder in advance.
There is also a device that integrally draws a part of the storage body with a drawing tool, and a device that press-forms the honeycomb structure together with the divided outer cylinder and welds the honeycomb structure together. In the former, the surface of the outer cylinder is directly rubbed by the drawing tool, which may leave scratches or burn marks that may damage the product value.In the latter, the welding speed is the rule, which not only makes it unsuitable for mass production, but also damages the equipment itself. There were problems such as the increase in size. In order to improve this, a device has been devised that crushes the honeycomb structure into a racetrack shape and press-fits the honeycomb structure into a racetrack-shaped outer cylinder from above.

0003

[Problems to be Solved by the Invention] The above-described device crushes the honeycomb structure into a racetrack shape and press-fits it into the outer cylinder from the upper part in this state. When press-fitting into the cylinder, it is necessary to maintain a predetermined shape during press-fitting, so the crushing head must hold down the honeycomb structure until it enters the outer cylinder. In this case, the press-fitting head press-fits the honeycomb structure into the outer cylinder between the crushing heads, that is, the press-fitting head is narrower than between the crushing heads, or wider than the gap between the crushing heads, and the crushing heads are made in multiple stages, A method is used in which the press-fitting head is used to open the head by squeezing it by the amount to be press-fitted.

However, in any of these devices, when pressing the honeycomb structure into the outer cylinder, it is difficult to insert the honeycomb structure into the outer cylinder because the flat foil on the outermost periphery is thin and due to frictional resistance of the crushing head or the inner surface of the outer cylinder. In this case, the outermost flat foil will pop out even when press-fitting is complete. In order to solve this problem, methods have been adopted such as tapering the end of the outer cylinder or applying lubricating oil to the inner surface of the outer cylinder, but these methods have not been sufficiently effective. The present invention is an alternative crushing and press-fitting device for honeycomb structures, since it is difficult to press-fit a honeycomb structure into an outer cylinder by simply press-fitting a honeycomb structure with a press-fitting head, and it is not possible to prevent the flat foil on the outermost periphery from popping out. It provides:

[0005]

[Means for Solving the Problems] In order to achieve the above object, when a crushed honeycomb structure is press-fitted into an outer cylinder, the upper part of the honeycomb structure is press-fitted while being clamped. The outermost foil of the crushed honeycomb structure is restrained by clamping, and the upper surface of the crushed honeycomb structure is press-fitted from above with a large head, thereby keeping the upper surface of the honeycomb structure aligned. Can be done. By continuing the press-fitting process in this state until the press-fit is completed, it is possible to manufacture a carrier in which the outermost foil does not protrude. If the clamp or crushing head is opened midway through, the outermost foil will loosen, causing waving of the outermost foil, and ultimately leading to the outermost foil popping out. Therefore, it is more effective to restrain the clamp until it is just about to hit the outer cylinder. There is.

[0006] The present invention is an apparatus for manufacturing a racetrack type metal carrier for an automobile exhaust gas purification catalyst, in which a honeycomb structure is press-fitted into an outer cylinder while the upper part of the honeycomb structure is clamped. Initially, the honeycomb structure is crushed into a predetermined shape by a crushing head. The crushing head is composed of a pair of multistage heads that can be opened and closed independently. Then, the uppermost head is opened and the upper part of the honeycomb structure is restrained instead with clamps having a predetermined spacing. The clamp must have a restraining force to overcome the springback of the crushed honeycomb structure. The vertical length of this clamp must be short and long enough to hold the upper part. The honeycomb structure is press-fitted into the outer cylinder while the upper part of the honeycomb structure is restrained, but when the clamp part finally reaches the outer cylinder, the clamp is released and the honeycomb structure is press-fitted. In this way, it is important that the outermost periphery of the honeycomb structure is restrained to the end. Moreover, since the clamp is eventually opened and the outermost periphery is left in a free state, it is better that the length of the clamp in the vertical direction is short. However, since the purpose of the clamp is to prevent the outermost foil from popping out, it is necessary to have a length sufficient to prevent the outermost foil from popping out due to the waving phenomenon of the outermost foil. In order to prevent the outermost foil from popping out, the press-fitting head must be larger than the end face shape of the honeycomb structure so that it can press the entire surface of the honeycomb structure.

[0007]

[Embodiments] Examples of the present invention will be described below. The figure shows the configuration based on an example. FIG. 1 shows a state in which the upper part of the honeycomb structure is restrained with a clamp after crushing. Moreover, FIG. 2 is a plan view of the same as viewed from above.

The cylindrical honeycomb structure 1 is crushed into a predetermined shape by crushing heads 2, 3, and 4. After being crushed into a predetermined shape, the crushing head 2 is opened. Next, the press-fitting head 5 is lowered to push down the honeycomb structure 1 slightly, and then the upper part of the honeycomb structure 1 is clamped by the clamp 6.
restrain from both sides. In this state, the press-fitting head 5 is lowered and stopped just before the clamp 6 hits the crushing head 3. By this length of descent, the honeycomb structure 1 is press-fitted into the outer cylinder 8 fixed by the outer cylinder guide 7. The upper and lower ends of the honeycomb structure 1 are now held. Next, the crushing head 3 is opened and stopped just before the clamp 6 hits the crushing head 4. The crushing head 4 and the outer cylinder guide 7 are also subjected to the same process, and the clamp 6 is finally stopped before it hits the outer cylinder 8. FIG. 3 shows this state. lastly,
The clamp 6 is opened, the press-fitting head 5 is lowered, and the honeycomb structure 1 is pushed into the outer cylinder 8 to complete the press-fitting.

The clamp 6 is opened and closed by inserting and removing a cylinder rod 10 installed on the press-fitting head 5. By integrating the clamp 6 and cylinder 9 with the press-fitting head 5 in this way, the apparatus can be simplified and the upper part of the honeycomb structure 1 can be easily restrained. As shown in FIGS. 1 and 2, the structure of the clamp is that the clamp 6 is connected to pins 11 and 12 at two locations: the cylinder rod 10 and the press-fit head 5.
They are joined together and restrained according to the lever principle. Furthermore, the clamp interval can be kept constant by using the lower surface of the press-fitting head 5 as a stopper. In other examples, although not explicitly shown here, the honeycomb structure can also be restrained by moving the clamps in the horizontal direction.

[0010] As an example of this device, the thickness is 50μ,
A flat foil with a width of 100 mm and a corrugated foil of the same size were rolled up to create a honeycomb structure with an outer circumference of 80 mm, and the honeycomb structure was press-fitted into a metal outer cylinder with an inner diameter of 79.5 mm. When the upper part of the honeycomb structure was clamped and press-fitted using the apparatus of the present invention, it was possible to press-fit the outermost peripheral foil without causing it to protrude from the end surface of the outer cylinder.

[0011]

[Effects of the Invention] As described above, according to the crushing/press-fitting device of the present invention, a metal carrier of stable quality can be obtained without causing the outermost foil to protrude from the end face of the outer cylinder, and the effect is extremely large. It is.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a state in which the upper part of a honeycomb structure is restrained by a clamp after crushing.

FIG. 2 is a top plan view of what is shown in FIG. 1;

FIG. 3 is a front view showing a state in which the clamp is stopped before it hits the outer cylinder.

[Explanation of symbols] 1 Honeycomb structure 2,3,4　Crushing head 5 Press-fit head 6 Clamp 7 Outer cylinder guide 8 Outer cylinder 9 Cylinder 10 Cylinder rod 11,12 pin.

Claims (1)

[Claims] 1. An apparatus for manufacturing a racetrack-type metal carrier for an automobile exhaust gas purification catalyst, comprising: a crushing head composed of multiple stages for crushing a cylindrical honeycomb structure into a racetrack shape; A crushing/press-fitting device consisting of a clamp that holds the upper end.