JPS59525A - Silencer manufacturing method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention 8A relates to a method VC for manufacturing a muffler for internal combustion engines, etc.

In the Koyao silencer, as shown in Fig. 1@2, a substantially box-shaped main body 1 and a lid-shaped member 2 are formed, and the inside of the main body 1 is partitioned, and a plate 3 is used to partition the top and bottom of each other. It is known to form an expansion chamber 4'5 that passes through the air, one of which is connected to an O chamber 4t-engine VO exhaust pipe E, etc., and the other is discharged from the chamber 5.

6 ore above exhaust pipe E,! : O connection 0.7 is the exhaust port, 8 is a part of the partition plate 3
It is a passage hole.

Conventionally, the main body 1, lid-like body 2, partition plate 3v, and the like are separately formed by press molding, etc., and then assembled and fixed together, which results in poor productivity due to the large number of parts and manufacturing man-hours.

The present invention has been proposed in view of the above points, and is unique in that this type of muffler is mass-produced at low cost by automatically forming and assembling J-nills sequentially on a progressive press molding of a single metal band plate. The purpose is to

That is, the main body 1, lid-shaped body 2, partition plate 3, and parts 03 are successively connected at the connecting parts 9 and 10 and press-molded into one body, and the molded parts 1 to 6 of the molded product 03 are connected at the connecting parts 9 and 10. The gist is a method for manufacturing a silencer O, which has the following seven characteristics: folding, overlapping the peripheral edge parts 1m-3a of these 1 to 6, and tightening the overlapping parts 1) and assembling them integrally.

A detailed explanation will be given below based on an illustrated example. In manufacturing a silencer consisting of a main body 1, a lid-shaped body 2, and a partition plate 3 shown in Figs. 1 and 2, the following o! Do it in P order.

In other words, there is no need to press-form metal strips.

At 15 shown in FIG. 3, the main body 1, the lid-like body 2, and the partition plate 303, which are integrally connected to each other by connecting portions 9-10, are simultaneously molded into substantially dish shapes. At the 70th anniversary, the exhaust pipe E, the υ connection port 6, the exhaust lower, the through hole 8, etc. are also formed at the same time. 11 is formed on the overlapping edge 1a of the main body 10 at a substantially right angle thereto, and is 7tX.
)' It is formed at the connecting part 9 between the main body 1 and the lid-like body 2 at substantially the entire periphery of the above-mentioned edge 1&, and the upper and lower parts 9Fi are formed to have a narrow width.

Then, fold the molded product 03 part 1 to 6t at the connecting part 9φ10, overlap the peripheral edge parts 1 and 3at of 1 to 6, bend the caulking allowance 11' into a substantially U-shaped cross section, and tighten the overlapped part. It is assembled in one piece by caulking. For example, thin crease lines 9 & 1 oav may be formed at the bending portions of the upper slow contact portions 9 and 10 during the press forming described above.

In the figure, reference numeral 12 indicates a mounting hole for an engine or the like.

Note that ``C'' is applied to a muffler having one partition plate 57 for partitioning the inside of the main body 1, and ``9'' represents proportionality, and can also be applied to a muffler having a plurality of partition plates 3.

The present invention is based on the above-described process, in which the main body 1, the lid-shaped body 2, the partition plate 5, and the 5 parts, which are constructed on the muffler, are assembled in order and then connected by s9 and 10, and press-molded into one piece. It is extremely easy to mold compared to molding separately, and the six parts 1 to 3 of the above molded product can be folded at the connecting parts 9 and 10 to form the peripheral parts 1 to 60 of the parts 1a to 3akj! Since it can be assembled in one piece by just screwing together and caulking, a series of operations from molding to assembly of the parts that make up the silencer can be done in one piece.
It is an extremely effective manufacturing method for this type of silencer because it can be mass-produced at low cost and can be fully automated by sequentially molding and assembling W plate T press molding O sequentially.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a muffler manufactured by the method of the present invention, Fig. 2 is a vertical sectional front view thereof, and Fig. 45 is a perspective view of the next state after forming the parts. 1 is the main body, 2 is the lid, 6μ partition plate, 4 and 5 are the expansion chambers,
9 and 10 are connecting parts. Special fraud applicant Honda Motor Co., Ltd. agent Fuku 1) Recommendation 1: “P1S

Claims (1)

[Claims] (13) Consisting of a substantially box-shaped main body and a lid-like body, the main body is divided into upper and lower parts by a partition plate to form expansion chambers that retard each other. The muffler is connected to the O exhaust pipe and discharged from the other O storm.The three parts, the main body, the lid, and the partition plate, are successively connected at the connecting part and pressed and molded as one body, and the molded product is produced. 03 Section A method for producing a silencer, in which the above-mentioned delayed connection parts are joined together, their peripheral parts are joined together, and then the overlapping parts are crimped and assembled into one piece.