JPS58151923A - Forming method of die for forming bead of metallic gasket and its die - Google Patents

Abstract

PURPOSE:To form easily a die used for forming a bead by accurately making base plates to coincide with each other, by unifying two metallic base plates to cut a slit, and inlaying a metallic band plate projectingly in the slit of one base plate, and reforming the slit in the other plate to be large and the same in width in the direction of the plate thickness. CONSTITUTION:When a male die 10 and a female die 18 are placed oppositely, the center line C of a projecting part 16 of metallic band plate 12 inlaid in the male die 10 and the center line C of a large slit 18S of the female die 18, are accurately aligned facing each other, and the die is obtained which is capable of forming a bead 24 having the same inclined angles at its both sides of an original sheet 22g between the base surfaces 14 and 14 of the male and female dies 10 and 18.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for forming a mold for forming a bead of a metal gasket, and a method for manufacturing the metal.
The present invention relates to a method for forming a bead made of gold for a friend metal gasket by forming it wider than a male O-slit and between the top and bottom, and to the metal.

9 for internal combustion engine! The metal gasket used is press-molded with a pair of metal molds consisting of a fan shape and a shank.

This application discloses a method in which slits of approximately the same shape are separately drilled in the am and # of the gold beads for bead formation, and a metal strip is drilled in the 5tJi slit to form the protrusion S. The invention was completed by ILK and has not yet been published. However, in this invention, the protrusion of the bulge and the @-shaped slit are aligned and opposite to each other at a high degree of n! It has to be cold, and the molding method for female kinoboro is complicated.
This is a disadvantage because it requires a lot of labor and time to form the mold, and it is made of extremely expensive metal.

Therefore, the purpose of this invention is to drill a slit up to the point where a gold male mold and #1 black substrate are combined, and to install a gold Jl+141 plate as a protrusion in the slit of the male mold. From K, the female slit is reshaped to have a larger groove than the male slit and the same width on the top and bottom.

2. The mold can be molded easily and correctly. The object of the present invention is to provide a method for forming a metal gasket bead forming mold that can save a great deal of labor, time, and time, and to make the mold made of metal.

Embodiments of the present invention will be described in detail and specifically below with reference to the drawings.

1 to 3 show a first embodiment of the present invention, in which 2 is a mold for forming a bead for a metal gasket, and 4 is a stand! , 6 are metal substrates. These two metal substrates 6.6 are combined (using a crank or the like), and then a slit 8 is cut into a desired bead shape using a cutting device such as a wire cutter (not shown). Then, this combination is released, one of the substrates 6 is made into a male type, and a metal strip plate 12 is attached to the substrate surface 14 on this holder 8.
The protruding portion 16 is formed by making the moat protrude by a predetermined height h. Make the other base @ 6 into a female mold, and use a cutting device such as a wire cutter to re-form a large groove 18 a K^ that is wider than the slit 8 and has the same width above and below, but the m-type lO and the female mold 1
This large part 1118g is reshaped so that the protruding part 16 of the metal band plate 12 is located at the center mc of the large part 18a of the female mold 18, in the pupil facing the part 8. And Jl type lO and m m
is and fixing fittings 20 such as bolts to the respective pedestals 4, 4.
．． 20 to complete the metal mold consisting of the male mold 10 and the female mold 8. In addition, the code|symbol n is the main plate of a metal gasket, and 24 is a bead.

next#! The effects of the dormitory example will be explained.

As shown in w
position. Then # fil as shown by I@儂-
18 is pushed forward by hydraulic pressure or the like, and the respective substrates il+ 1
4.

22g of the original plate was strongly pressed for 14 minutes. As a result, a bead is formed on the main plate 22 with equal inclination on both sides as shown by the imaginary line.

FIG. 4 shows a second example of the present invention.

The characteristics of this second example are that 1s type lO and #
When disposed facing the S type 18, the protruding portion 1 of the metal strip 12
The large groove 18g is formed such that the large groove 18g is offset either inwardly or outwardly from the center alc of the large groove 18g. If formed in this way, it will look like the imaginary line shown in FIG.

The cross-sectional shape of the door 24 is 11i! It is possible to form a special bead with an unequal inclination on both sides, which is not a difathom triangular shape as in the example, and this allows the spring constant to be changed for each bead, resulting in performance in different areas with different contact surface pressures. Gold with -
You can get a gasket.

It should be noted that this invention is not limited to the above-mentioned embodiments 1 and 2, and it goes without saying that the tanks may be modified without departing from the spirit of the invention.For example, in molding a mold, In order to create a step on the substrate surface, an intermediate plate can be interposed between the two pedestals and the substrate, and this allows a step to be formed in the bead shape as well. Bead formation becomes possible.

As is clear from the above description, the present invention provides the following effects.

(1) A molding method of a mold for forming a bead of a metal gasket according to the present invention, and the mold, are provided by cutting a slit into a desired bead shape using a cutting machine such as a wire cutter while keeping two metal substrates combined. Set up.

A metal band plate is drilled in the female-shaped slit of one board so as to protrude from the base gun surface, and the slit of the other female-shaped board is re-formed into a large groove with the same width on the top and bottom, so it is different from the 1s type. The metal gasket can be accurately opposed to the female mold, and molding of the mold can be facilitated, and the bead of the metal gasket can be formed accurately.

(2), t. Because molding can be done easily.

Compared to conventional methods, metal molding does not require much labor and time, and the cost of manufacturing metal is low.

[Brief explanation of the drawing]

Figures 1 to 3 show the first actual JI example of the present invention.
! The second reason is a cross-sectional view at 111 of the mold, and FIG. 3 is an enlarged cross-sectional view of the layer portion in the direction of the arrow in FIG. Figure llN4 is an enlarged view of the mold placement part lrT#J showing the second embodiment of the present invention. In the figure, 2 is a metal gasket bead forming mold;
6 is gold xs*, 8 is slit, 10 is male type. 12 is a metal strip, and 18 is a female mold. Applicant: Nippon Metal Gasket Co., Ltd. Agent Patent Attorney Yoshimi Saigo Figure 1 Figure 2

Claims (1)

[Claims] (1), Drill a slit in the shape of a bead up to the point where the two metal substrates are combined, and release this combination. As one substrate t-am, the slit of this factory 1 is made of gold I.
A 14g IJ#L is made to protrude from the side of the substrate and is firmly dug.
), - Make a slit in the required bead shape on the metal substrate, and attach the metal strip plate 11 to the substrate surface and firmly drill it to form a tm + metal lid, and attach it to the other metal substrate. is the same shape as the slit, but is larger than the slit and has the same width on the top and bottom, and is made of metal for forming a bead for a metal gasket.