JPS602975B2 - Continuous manufacturing method and device for cylinder head gaskets - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for continuously and efficiently manufacturing cylinder head gaskets for automobile engines and the like.

The conventional method for producing this type of cylinder head gasket is '11. First, the outer periphery of the gasket sheet is punched out into the shape of the gasket product, and at this time, the necessary holes are also punched out at the same time.

{2} Attach metal fittings such as grommets and eyelets to predetermined positions on the lower mold placed in the press.

(Of the metal fittings, the grommet is for the cylinder hole, and the eyelet is for the oil hole.) '3' Insert the cylindrical part of the metal fitting into the gasket hole, and remount the gasket on the lower mold.

[4- Lower the upper mold toward the lower mold, and caulk and expand the entire upper end of the cylindrical part of the metal fitting that protrudes from the upper surface of the gasket, as shown in Figure 1.

This operation requires the strictest processing precision in this manufacturing method. The key point is the accuracy of dimension 1 in FIG. (
5} Next, the metal fittings caulked as shown in FIG. 1 are press-formed as shown in FIG. 2, and crimped onto the gasket.

This work was performed in sequence.

Among the above operations, the operations for leg ~'3'' are a series of operations performed by the same equipment section. The gasket sheet used is, for example, a core material of wire gauze with an asbestos rubber mixture coated on both sides by pressure bonding. When attempting to complete such a conventional manufacturing method as a continuous manufacturing method by mechanization, various devices that previously relied on manual labor (periphery punch press, main swaging press,
Operations such as transporting the semi-finished product between the metal fittings crimping presses and positioning the semi-finished product relative to each device must be carried out by machines, and therefore there is a problem in that complicated handling machines have to be used.

The present invention provides a highly efficient continuous manufacturing method and apparatus for cylinder head gaskets that do not require complicated handling machines.

The present invention will be explained below with reference to the illustrated embodiments.

First, an overview of the entire device will be explained with reference to Figures 3 and 4.
Reference numeral 1 denotes a coil of a long gasket sheet having a width corresponding to the length of the cylinder head gasket 10 shown in FIG. The sheet la is sequentially sent to the counterfeiting machine in each process. This long sheet la is made of, for example, the above-mentioned wire mesh core with asbestos rubber mixture pressure-coated on both sides. The long sheet la is fed by a sheet feeding device (not shown) placed at an appropriate location, and is first passed through a punching press 3.
It passes through and is drilled into cylinder holes, oil holes, pilot holes, etc., and then sent to a device (temporary fitting device) 4 for temporarily attaching metal fittings such as chromets and eyelets to the long sheet. Next, the long sheet is sent to a metal crimping press 5 and crimped as shown in FIG.

Next, the longest sheet enters the metal fitting press 6, and the metal fittings are pressed onto the long sheet as shown in FIG. Next, this long sheet enters an outer periphery punching press 7 to punch out gaskets 10 one by one, and the waste material lb enters a cutting machine 8 where it is cut into pieces and placed in a storage box 9. When passing through each process in this way, some stopping time is required for each process, so the long sheet la is provided with an appropriate amount of slack between each device.

Further, during pressing in each step, pins provided in the mold are inserted into pilot holes to maintain accurate relative positions between the mold and the scale sheet. Note that, depending on the case, the hole punching process may be performed in a separate production line, and the hole punched long sheet may be supplied to the metal fitting temporary attachment device 4. Next, details will be explained focusing on the metal fitting temporary attachment device 4. FIG. 5 shows the long sheet la when it comes out of the punching press 3, where 11 is the shunder hole of a 4-cylinder engine, 12
13 is an oil hole, 13 is a pilot hole, and the others are bolt holes and water holes. (However, the bolt holes may be punched out in the outer periphery punching process.) Figure 6 is a plan view of the temporary fitting device 4;
FIG. 7 shows a longitudinal sectional view of the same part. Reference numeral 41 designates a turntable as a movable table that is installed under the long sheet and whose rotation center is placed in the center of the width of the long sheet, and on its upper surface, four lower molds 42 are mounted at equal distances from the rotation center. They are placed at equal intervals.

Each mold is moved to a predetermined position A directly below the temporary staking press 44 as the turntable rotates 1/4 turn by a drive device 43. Each of the lower molds 42 is mounted on the turntable by loosely inserting the protrusion 42a on the lower surface into the hole 41a of the turntable 41, and can be slightly moved back and forth and left and right. Reference numeral 45 denotes an elevating device located below the A position, which includes a platform 453 that is raised and lowered by a cam 452 driven by a motor 451, and has a platform 453 that is raised and lowered by a cam 452 driven by a motor 451.
When the second part comes over the corresponding protrusion 42b of the lower die 42 (generally refers to the protrusion corresponding to the cylinder hole, oil hole, etc.), push up the lower die 42 at position A and move it into the long form. It is designed to be held at a predetermined height directly below m.

Position B of the turntable is the working position for attaching a metal fitting 46 such as a grommet to the protrusion 4:2b of the lower mold, and a worker beside the table takes the metal fitting on the pupil stand and attaches it to the protrusion 42 of the lower mold.
Perform the work of attaching it to b. If the installation work is complicated due to a large number of metal fittings due to gaskets, two people should use work positions on both sides of the table to attach the metal fittings to one lower mold. Use only one working position. Position C is a position that is not used for work. 47 is a sheet holding device, which holds a holding plate 472 with a spring 4.
It is attached to the upper mold 48 via 71.

Above, the mold 48 is attached to the temporary staking press 44.
The sheet holding device 47 descends together with the upper mold 48 attached to the temporary crimping press 44, presses down the long sheet, and inserts the tube of the metal fitting 46 already attached to the lower mold 42 into the hole of the long sheet. In addition to inserting the parts, the long sheet is pressed between it and the lower mold.

next,. The descending upper die 48 pushes out a part of the cylindrical portion of the metal fitting 46 that protrudes above the longest sheet (this is called temporary caulking, which will be described later), and temporarily attaches the metal fitting 46 to the long sheet. Since the metal fittings 46 are attached in this manner, the metal fittings 46 will not fall off from the long sheet while the longest sheet is being moved to the next process of metal fitting staking and press 5. Generally, long sheets for gaskets use a metal material such as wire mesh as the core material, so the sheet may not necessarily be damaged due to the core material itself or due to curling when coiled. Although the sheet is not flat and has undulations, in the present invention, a sheet holding device 47 is provided to correct the curl of the sheet, making it easy to insert metal fittings and temporarily swage the sheet. .

In the actual caulking process, the metal fittings work to correct the curl of the long sheet, so such a sheet holding device is not necessarily required, but it is essential during the metal fitting temporary attachment process.

On the lower surface of the upper mold 48 corresponding to the cylinder hole 11,
As shown in FIG. 9, a cross-shaped projection 48a is formed, and correspondingly, a cross-shaped groove 42c is formed in the lower mold projection 42b as shown in FIGS. 10-11.

Therefore, by lowering the above-mentioned 48 by an appropriate amount, the protrusion 48a is inserted into the groove 42c.
When the cylinder hole 11 is inserted into the saddle to an appropriate depth, the metal fitting 46 (grommet) fitted in the cylinder hole 11 is slightly expanded outward at four locations as shown in the caulked portions 46a in FIGS. 12-13. Therefore, the upper mold 48 is raised and the lower mold 42 is moved by the cam 452.
Even after lowering the molds with
does not separate from the long sheet la. The small gold eyelet inserted into the oil hole 12 is temporarily caulked in about two places or around the entire circumference. As the movable table, in addition to the turntable as in the above embodiment, various methods can be considered, such as using a table that moves in a direction perpendicular to the longitudinal direction of the longest sheet. The main crimping press 5 is used to uniformly and strongly swage the metal fittings 46, which have been temporarily swaged by lightly pushing apart the four locations as described above, as shown in Figs. 14 and 15.
As a result, the four temporary caulking portions 46a are replaced by the permanent caulking portions 46.
It ends up being the same as b.

Next, the long sheet is transferred to the metal fitting press 6, and the 16th to
As shown in Fig. 17, the metal fittings are pressed so that the thickness L becomes a predetermined size, and are crimped onto a long sheet.

Next, from the long sheet la to which the metal fittings 46 are attached, the outer periphery punching press 7 is used to remove the gaskets 10 one by one (the 18th
(Fig.) is punched out to become a product.

The steps after the outer periphery punching press 7 are the same as those in normal pressing operations. In the present invention, the metal fittings are temporarily attached to the long sheet by temporarily caulking the metal fittings in the pre-process of the metal fitting final crimping process. If the caulking process involves simultaneously inserting the gold odor, the following extremely serious inconveniences will occur in a continuous production line.

That is, '1' First, if you try to use one upper die for real crimping while exchanging a number of lower dies for real crimping, it will be extremely difficult to match the upper and lower dies, and it will be difficult to match the upper and lower dies. It is not possible to guarantee the strict processing accuracy required.

■ If multiple pairs of upper and lower molds are used while being exchanged in order to improve machining accuracy, the equipment will become complicated and the cost of the molds will increase, making it unsuitable for industrial use.

{3' If it is attempted to perform final crimping using only one pair of upper and lower molds, the production line speed will decrease.

That is, since severe machining precision is required, the work time for inserting the gold odor into the long sheet is directly added to the time for the final caulking process, which is a bottleneck in the speed of the production line. Further, since the lower mold is placed under a wide long sheet, it is extremely difficult to attach the metal fittings to the lower mold, and the fitting of the metal fittings to the lower mold tends to be incomplete. Furthermore, due to malfunction, the upper mold may come down while the metal fittings are being attached to the lower mold, which is also a problem from the viewpoint of safety work. Since the present invention is a manufacturing method and apparatus as described above, it has the following effects and has extremely large industrial effects.

'1 - Since the entire process up to punching out the outer circumference of the gasket is performed using a long sheet, it requires less manpower to transport the semi-finished product between each process, compared to a continuous manufacturing method that follows the conventional method of punching out the outer circumference of the gasket. Further, no special handling mechanism is required, and the positioning of semi-finished products in each process becomes easy, and the continuous production of cylinder head gaskets can be carried out extremely efficiently and economically.

'21 Since the metal fittings are temporarily attached to the long sheet by temporarily caulking the metal fittings in the pre-process of the metal fitting final crimping process, the above-mentioned inconvenience that would occur if this was not performed does not occur. In the process of temporarily attaching metal fittings, since a sheet holding device is provided, it is possible to correct the undulations that generally exist in the long sheet for gaskets, and it is possible to easily insert and temporarily swage the metal fittings into the long sheet.

[4'In the metal fittings temporary installation process, a lifting device is installed,
Since the lower die is supported from below, press force for temporary crimping is not applied to the movable table.

Therefore, there is no need to increase the mechanical strength of the movable table so much, and the device itself can be made 4-inch lightweight.Therefore, the drive device can also be made smaller, and the movable table can be started and stopped quickly. '51 Since the lower mold for temporary caulking is simply placed on a movable table, it can be moved slightly horizontally, making it easy to align it with the upper mold during temporary caulking.

'6) If the movable table is a turntable,
It is possible to easily arrange the work of attaching the metal fittings to the lower die at multiple locations, and for example, it is possible to divide the metal fitting bag counterfeiting work into two or more processes to increase the speed of the entire production line.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of a metal fitting that has been crimped, and FIG. 2 is a longitudinal cross-sectional view of a metal fitting that has been crimped and pressed. 3 to 18 show examples of the present invention, FIG. 3 is a schematic side view showing the entire layering, FIG. 4 is a plan view of the same, and FIG. 5 is a long sheet with perforated holes. A partial plan view, FIG. 6 is a plan view showing the turntable in the metal fittings attaching device, FIG. 7 is a side view, FIG. 8 is a side view of the temporary caulking protrusion of the upper die of the temporary caulking press, and FIG. 9 is a side view of the temporary caulking projection of the upper die of the temporary caulking press. The same bottom view, FIG. 10 is a plan view of the temporary caulking protrusion of the lower die in the temporary caulking press,
Fig. 11 is a side view of the same, Fig. 12 is a partial plan view of a long sheet with metal fittings temporarily swaged, Fig. 13 is a sectional view taken along A-A in Fig. 12, and Fig. 14 is a long sheet with metal fittings permanently swaged. A partial plan view of the shaku sheet, FIG. 15 is a sectional view taken along the line B-B in FIG. 14, and FIG.
The figure is a partial plan view of a long sheet with metal fittings crimped, No. 17
The figure is a sectional view taken along the line CC in FIG. 16, and FIG. 18 is a plan view of the completed cylinder gasket. la: long sheet,
3: Hole punching press, 4: Metal fitting temporary installation device, 5: Metal fitting crimping press, 6: Metal fitting crimping press, 7: Perimeter punching press, 10: Silling head gasket, 41: Turntaffle, 42: Lower die, 44: Temporary caulking press, 45: Lifting device, 46: Metal fittings, 47: Sheet pressing device, 471:
Spring, 472: Pressing plate, 48: Upper mold. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Figure 14 Figure 15 Figure 16 Figure 17 Figure 18 Z Division (current) Published Patent Number et al. Kokai 60-297
No. 5, published on January 25, 1986, Takeno Umamu No. 5 [366]) has been amended pursuant to the provisions of Article 64 of the Patent Law, so it is published as follows. Patent No. 1386073 lnt. C.I. 4 Identification code Internal office reference number B29C 65/00
2114-4F〆F16J 15/02
6673-3JB29K 21:00
4FI05:22
4FB29L 31:26
Section 4F 1 “Claims” section changed to “1
Temporary metal fitting process in which metal fittings such as gromments and eyelets are temporarily attached to the holes of the long sheet for gaskets with the necessary holes drilled to prevent the metal fittings from falling, and final clinching of the metal fittings in which the temporarily installed metal fittings are swaged as a whole. A method for continuously manufacturing a cylinder gasket, comprising: a metal fitting crimping process for crimping a caulked metal fitting onto a long sheet; and a peripheral punching process for punching out a product-shaped gasket from the long sheet with the metal fitting crimped thereon. 2. Move the lower mold, which has been fitted with metal fittings at a separate location, to the bottom of the long gasket sheet with the necessary holes punched, then hold it in the specified position directly under the long sheet, and then press it with the sheet holding device. After pushing down the long sheet and inserting the cylindrical part of the metal fitting into the hole of the long sheet and pressing the long sheet with the lower mold, the upper mold descends onto the lower mold. The metal fittings are temporarily attached to the long sheet by pushing out a part of the cylindrical part of the metal fittings protruding from the top surface of the long sheet, and then the long sheet with the above metal fittings temporarily attached is subjected to the next metal crimping process. 2. A method for continuously manufacturing a cylinder head gasket according to claim 1, wherein the cylinder head gasket is sent to a cylinder head gasket. 3 Temporary fitting device for temporarily attaching fittings such as grommets and eyelets to the holes of a long sheet for gaskets with the necessary holes punched, a press for caulking the temporarily attached fittings, a press for caulking the entire fittings A metal fitting crimping press that presses the metal fittings onto the long sheet, and a peripheral punching press that punches out a product-shaped gasket from the long sheet with the metal fittings crimped are installed. - A lower die transport device that moves the long sheet to the bottom and holds it in a predetermined position directly under the long sheet, and presses down the long sheet and inserts the cylindrical part of the metal fitting into the hole of the long sheet, and also connects the long sheet with the lower die. A sheet holding device that presses the long sheet with The lower mold conveying device in the metal fitting temporary attachment device is located under the long sheet, and is configured to rotate the plurality of lower molds placed on the upper surface of the long sheet to the outside of the inner wall of the long sheet. The turntable is placed under the turntable, and the lower mold with the metal fittings attached, which is moved to a predetermined position under the long sheet by the rotation of the turntable, is pushed up from below to a predetermined position directly under the long sheet. 1. A continuous manufacturing apparatus for cylinder head gaskets, comprising a lifting device for holding the cylinder head gasket at a certain height.

Claims (1)

[Scope of Claims] 1. A temporary fitting process for temporarily attaching fittings such as grommets and eyelets to holes in a long sheet for gaskets that have been punched with necessary holes; A final crimping process for completely caulking the temporarily attached fittings; A continuous manufacturing method for cylinder head gaskets, comprising: a metal fitting crimping step for crimping a caulked metal fitting onto a long sheet; and a peripheral punching step for punching out a product-shaped gasket from the long sheet with the metal fitting crimped thereon. 2. Move the lower mold, which has been fitted with metal fittings at a separate location, to the bottom of the long gasket sheet with the necessary holes punched, then hold it in the specified position directly under the long sheet, and then press it with the sheet holding device. After pushing down the long sheet and inserting the cylindrical part of the metal fitting into the hole of the long sheet and pressing the long sheet between the lower mold, the upper mold lowers onto the lower mold to cut the long sheet. The feature is that the metal fittings are temporarily attached to the long sheet by pushing out a part of the cylindrical part of the metal fittings protruding from the top surface of the sheet, and then the long sheet with the metal fittings temporarily attached is sent to the next metal fitting crimping process. A method for continuously manufacturing a cylinder head gasket according to claim 1. 3. Temporary fitting device for temporarily attaching fittings such as grommets and eyelets to the holes of a long sheet for gaskets with the necessary holes punched; A press for caulking the entire temporarily attached fitting; A press for caulking the entire fitting. A metal fitting crimping press that presses the metal fittings onto the long sheet, and a peripheral punching press that punches out a product-shaped gasket from the long sheet with the metal fittings crimped are installed. A lower mold conveying device that moves the sheet to the bottom of the long sheet and holds it in a predetermined position directly under the long sheet.
A sheet holding device that presses down a long sheet and inserts a cylindrical part of a metal fitting into a hole in the long sheet, and also presses the long sheet between a lower die and lowers an upper die onto the lower die to hold the long sheet. It has a temporary crimping press that stretches out a part of the cylindrical part of the metal fittings that protrudes from the top surface of the sheet, and the lower die carrying device in the temporary metal fitting device is located under the long sheet and places it on the top surface. a turntable configured to allow a plurality of lower molds formed to be rotated to move them out of the width area of a long sheet; 1. A continuous manufacturing apparatus for cylinder head gaskets, comprising an elevating device that lifts up a lower mold equipped with metal fittings from below and holds it at a predetermined height directly below a long sheet.