JP4672838B2 - Manufacturing method of gasket - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for manufacturing an annular gasket used for sealing between a bolt and its mounting member.
[0002]
[Prior art]
(Conventional example 1)
Figure 15 is a plan view showing a gasket G ₃ in the conventional example 1, FIG. 16 is a sectional view of FIG. 15.
[0003]
The gasket G ₃ are, as shown in both figures, the annular holding plate 51 of stainless steel, a rubber ring 52 of U-shaped cross section on the periphery of the profiled bore is of a structure deposited together.
[0004]
For example, as shown in FIG. 17, the gasket G <b> ₃ is used for sealing between the head 53 a of the bolt 56 attached to the hole 54 of the member 53 with a nut 55 and the member 53.
[0005]
(Conventional example 2)
FIG. 18 is a plan view showing a gasket of Conventional Example 2, and FIG. 19 is a cross-sectional view of FIG.
[0006]
The gasket G ₄ are a conventional three provided gaskets tongue 59 of triangular cross-section at 120 degree intervals to form a hole 58 of the triangle on the inner peripheral surface of the hole 52a of the rubber ring 52 of the gasket G ₃ of. The three tongue pieces 59 are provided in parallel with the annular holding plate 51 at an intermediate portion in the thickness direction of the rubber ring 52.
[0007]
For example, as shown in FIG. 20, this type of gasket G ₄ is interposed between the member 60 and the nut 61 when the bolt 62 is passed through the hole 60 a of the member 60 and tightened with the nut 61. It is used for sealing the threaded portion 62a of the bolt 62 and the nut 61 portion.
[0008]
[Problems to be solved by the invention]
However, when the gasket G ₃ of the conventional example 1 is fitted into the bolt 56 and inserted into the hole 54 of the member 53, the fitted gasket G ₃ often falls off the bolt 56 depending on the direction of the bolt 56. . This is because the diameter of the hole 52a of the rubber ring 52 is larger than the diameter of the bolt 56 (the diameter of the shaft portion 56b and the outer diameter of the screw portion 56c).
[0009]
Gasket G ₄ of one of the second conventional example, when screwed into the threaded portion 62a of the bolt 62 fits into the valley of the tongue piece 59 threaded portion 62a, as shown in FIG. 21, mounted in an inclined state the bolt 62 It is done. That can not be attached coaxially to the bolt 62 of the gasket G _4.
[0010]
Therefore, as shown in FIG. 22, when the nut 61 is tightened, the inclined gasket G ₄ is sandwiched between the member 60 and the nut 61 and is held perpendicular to the axis of the bolt 62. Then, the rubber ring 52 is compressed by the pressure at the time of tightening the nut 61, and is in close contact with the thread and the valley bottom of the bolt 62.
[0011]
However, at this time, since the force tending to correct its attitude to the gasket G ₄ by tightening the nut 61 acts, uneven force acts on the rubber ring 52, distortion rubber ring 52, threaded portion 62a of the bolt 62 And there is a possibility that the nut 61 is not completely sealed.
[0012]
The present invention has been made to solve the problems of the conventional gaskets G ₃ and G ₄ , and when the bolt is fitted to the bolt during the bolt mounting operation, it can be temporarily fixed so as not to drop. can together, and an object thereof is to provide a gasket manufacturing method of the seal between the bolt and the other member can be completely performed.
[0013]
[Means for Solving the Problems]
The present invention can solve the above problems by providing the following configuration.
[0014]
[1] A method for producing a gasket used for sealing between a bolt and its mounting member, comprising the following steps (1) to (4).
(1) The diameter of the inner circumferential circle in contact with the tips of the adjacent convex portions of the gear-shaped deformed hole , which has irregularities on the inner circumferential surface, is made larger than the diameter of the bolt on the metal plate. A process that can be formed in large numbers at regular intervals.
(2) A step of integrally forming rubber on both surfaces of a metal plate in which a deformed hole is formed to obtain a laminate of the metal plate and rubber in which the deformed hole is filled with rubber.
(3) Using a cylindrical first cutting blade and a cylindrical second cutting blade larger than the first cutting blade, the laminated body is cut coaxially and annularly around the axis of the deformed hole of the metal plate. A small cylindrical blade having a diameter smaller than the diameter of a bolt formed by a plurality of convex wall bodies provided in the length direction at regular intervals on the wall body as the first cutting blade; The process of using what has the large cylindrical blade of the same diameter as the diameter of the volt | bolt formed with the concave wall body between the said protruding item | line wall bodies provided in.
(4) A step of capturing an annular gasket obtained by cutting the laminate in an annular shape at the same time as the cutting and pulling it up from the laminate, and then releasing the capture.
[0015]
[2] A method for producing a gasket used for sealing between a bolt and its mounting member, comprising the following steps (1) to (5).
(1) The diameter of the inner circumference circle that touches the tips of adjacent convex portions of the gear-shaped deformed holes with irregularities on the inner circumferential surface is made larger than the diameter of the bolt on the steel plate, and the deformed holes are made constant. A process that can be formed many times at intervals.
(2) A step of imparting spring performance by performing quenching and tempering after forming the periphery of the irregular hole of the steel sheet having the irregular hole into a corrugated shape hot or cold.
(3) A step of integrally forming rubber on both sides of a spring steel plate having a modified hole imparted with spring performance to obtain a spring steel plate and rubber laminate in which the modified hole is filled with rubber.
(4) A step of coaxially cutting the laminated body around the axis of the deformed hole of the steel sheet coaxially with a cylindrical first cutting blade and a cylindrical second cutting blade larger than the first cutting blade. The first cutting blade is a small cylindrical blade having a diameter smaller than the diameter of the bolt formed by a plurality of protruding wall bodies provided in the length direction at regular intervals on the wall body, The process of using what has the large cylindrical blade of the same diameter as the diameter of the volt | bolt formed with the concave wall body between the provided protruding wall bodies.
(5) A step of capturing an annular gasket obtained by cutting the laminated body into an annular shape at the same time as cutting and pulling it up from the laminated body, and then releasing the capture.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described by way of examples.
[0017]
Example 1
1 and 2 show an example of the first gasket (hereinafter referred to as Example 1). Figure 1 is a plan view of the gasket G ₁ of Example 1, FIG. 2 is an A-A sectional view of FIG.
[0018]
As shown in both figures, the gasket G ₁ includes an annular holding plate 1 made by punching a steel plate, and an annular rubber plate 2 having a U-shaped cross section integrally attached to the surface excluding the outer peripheral surface of the holding plate 1. It is made up of.
[0019]
The hole 1a of the holding plate 1 is a deformed hole, that is, a gear-shaped hole, although not shown, in order to prevent displacement due to relative rotation between the holding plate 1 and the annular rubber plate 2.
[0020]
The annular rubber plate 2 includes a virtual small cylindrical hole that contacts the top of the eight ridges 3 and a virtual large cylindrical hole that contacts the bottom of the eight concave grooves 4.
[0021]
The eight ridges 3 here are provided in the thickness direction of the rubber plate 2 on the inner peripheral surface of the cylindrical hole 2a of the annular rubber plate 2 at intervals of 45 degrees about the axis of the rubber plate 2. It is a thing.
[0022]
The eight concave grooves 4 are grooves formed between the ridges 3 provided in the cylindrical hole 2a. In this embodiment, the cylindrical hole 2a is the large cylindrical hole.
[0023]
Diameter of the small cylindrical hole, Yes slightly smaller than the diameter of the bolt fitting the gasket G _1, the large cylinder bore, are then substantially the same as the diameter of the bolt.
[0024]
3 to 8 are diagrams for explaining the manufacturing method of the gasket G _1. Hereinafter, this will be described in the order of steps.
[0025]
(1) Steel grain injection (shot blasting) was performed on the steel plate 11 shown in FIG. 3 to finish the surface of the surface, and then the finished surface was degreased.
[0026]
(2) As shown in FIG. 4A, the steel plate 11 after degreasing was punched to form 15 deformed holes 12. Spacing between the profiled bore 12, the gasket G ₁ as a final product Uchinukeru a size.
[0027]
In order to increase production efficiency, it is desirable to provide as many irregular holes 12 as possible on a large steel plate, but about 30 to 50 holes are within the practical range. In the embodiment, the case where 15 deformed holes 12 are provided will be described for convenience. The shape of the deformed hole 12 is a gear shape as shown in FIG.
[0028]
(3) The steel plate 11 and the rubber 13 shown in FIG. 6 in which the rubber 13 is heated and pressed with a roller on both surfaces of the steel plate 11 on which the modified hole 12 is formed, and the rubber 13 is filled in the modified hole 12. A laminate S was obtained.
[0029]
(4) the laminate S, and coaxially to obtain a gasket G ₁ to obtain cut annularly about the axis of the profiled bore 12 of the steel plate 11.
[0030]
In the cutting, the first cutting blade 14 shown in FIG. 8, a second cutting blade 15 having a cylindrical shape larger than the first cutting blade 14, and an electromagnet 16 installed between the two blades 14, 15 are used. A punching blade K was used.
[0031]
As shown in FIG. 8 (b), the cylindrical first cutting blade 14 has a diameter slightly smaller than the diameter of the bolt formed by the convex wall body a in the length direction provided on the wall body at intervals of 45 degrees. And a large cylindrical blade having a diameter substantially the same as the diameter of the bolt formed by the concave wall body b between the convex wall bodies a.
[0032]
Simultaneously cutting the laminate S adsorbed fixed by an electromagnet 18 on the lower mold 17 in this punching blade K, an electromagnet 16, adsorbs the gasket G ₁ cut, which lifting intact machining blade K, the adsorption Canceled and collected.
[0033]
Figure 9 is a gasket G ₁ as a final product was collected in this way.
[0034]
In Example 1, was as absorb and catch the gasket G ₁ after cutting by the electromagnet 16, it may be captured by vacuum suction. Moreover, although the laminated body S is attracted and fixed to the lower mold 17 by the electromagnet 18, it may be mechanically fixed to the lower mold 17.
[0035]
Figure 10 shows an example of a usage state of the gasket G ₁ of the above configuration. As shown in the figure, the gasket G ₁ is interposed between the head portion 7a member 5 of the bolt 7 mounted tightened by a nut 6 into the hole 5a of the member 5, between the two 7a, 5 Used to seal.
[0036]
The gasket G ₁ is in the sealing function is not different from the conventional gasket G ₃ above.
[0037]
However, in the case of the gasket G ₁ of the embodiment, the diameter of the small cylindrical hole is slightly smaller than the diameter of the bolt 7, so that the gasket G ₁ can be fitted to the bolt 7 by applying a little force. ing.
[0038]
Therefore, when mounting the bolt 7 to the member 5, when the work in a state fitted in advance the bolt 7 a gasket G _1, on its way, there is no risk of the gasket G ₁ is falling off the bolts 7. Thus, mounting workability of the bolt 7, better than using conventional gasket G _3.
[0039]
Further, when tightening the bolt 7 by a nut 6, the gasket G ₁ is compressed its annular rubber plate 2 in close contact with the shaft portion 7b of the bolt 7, between the head 7a and the member 5 of the bolt 7 is fully Sealed.
[0040]
Figure 11 shows another example of a usage state of the gasket G ₁ of the above configuration. As shown in the figure, the gasket G _1, when through the bolt 7 into the hole 5a of the member 5 attached to tighten the nut 6, and interposed between the members 5 and the nut 6, the screw portion of the bolt 7 Used for sealing 7c and nut 6 part.
[0041]
The gasket G _1, as described above, the diameter of the small cylindrical hole, slightly smaller than the diameter of the bolt 7, be added a little force, become a size that can be fitted a gasket G ₁ on the bolt 7 Yes.
[0042]
Accordingly, the gasket G ₁ of the first embodiment, only fitting added a little force to the bolt 7, as shown in FIG. 12, it is easily attached so as not to fall.
[0043]
Therefore, even if the work in a state fitted in advance the bolt 7 a gasket G _1, on its way, there is no risk of the gasket G ₁ is falling off the bolts 7. Therefore, the workability of attaching the bolt 7 is improved.
[0044]
Further, the gasket G ₁ of the first embodiment, simply by adding a slight pressure, as shown in FIG. 12, because it can be fitted to the threaded portion 7c of the bolt 7, also the inclination easily modify the gasket G ₁ after it has fitted Then, it can be positioned so as to be coaxial with the bolt 7.
[0045]
If the gasket G ₁ is, even if attached in an inclined state on the bolt 7, as shown in FIG. 13, when tightening the bolt 7 by a nut 6, inclined and the gasket G ₁ is member 5 and the nut 6 And is held perpendicular to the axis of the bolt 7.
[0046]
The compressive force on the gasket G ₁ by tightening at this time, because they act uniformly thereto, as shown in FIG. 13, the annular rubber plate 2 is uniformly compressed, the screw portion 7c and the nut 6 portion of the bolt 7 The seal is perfect.
[0047]
On the other hand, according to the manufacturing method of the gasket G ₁ of Example 1, at the same time punching the gasket G ₁ by punching blade K, since the collected pulled up from the laminate S adsorbs this, the punching step collecting The process can be performed efficiently, and the cost can be reduced by improving the work efficiency.
[0048]
(Example 2)
FIG. 14 shows an example of the second gasket (hereinafter referred to as Example 2). The figure a sectional view of the gasket G ₂ of Example 2, is a view corresponding to FIG.
[0049]
The gasket G ₂ is, instead of the holding plate 1 annular in gasket G _1, is obtained by using a steel plate 21 with a spring performance of the sectional waveform. The rest of the configuration is the same as the gasket G _1.
[0050]
Manufacturing method of the gasket G ₂ is, applying a spring performance is applied to the steel sheet 11 forming the profiled hole in a manufacturing method of the gasket G _1. Other configurations are the same as the process of manufacturing the gasket G _1.
[0051]
The spring performance was imparted as follows.
[0052]
That is, first, the periphery of the deformed hole 12 of the steel plate 11 in which the deformed hole 12 was formed was hot or cold and formed into a cross-sectional waveform shown in FIG. Next, this was quenched and tempered to give spring performance.
[0053]
Since the gasket G2 of the _second embodiment uses the steel plate 21 formed as described above and imparted with spring properties, the steel plate 21 functions as a spring washer when used as shown in FIG. 10 or FIG. The bolt tightening effect can be improved, and the compression effect of the annular rubber plate 2 due to the spring performance of the steel plate 21 is improved, so that the sealing is more complete.
[0054]
The steel plate 21 having spring performance can also be obtained by stamping and forming a spring steel plate.
[0055]
【The invention's effect】
As described above, according to the gasket obtained by the present invention , since it is configured as described above, it can be temporarily fixed to the extent that it does not fall when fitted to a bolt, and the seal between the bolt and another member can be sealed. Can be complete.
[0056]
In addition, according to the gasket manufacturing method of the present invention, since a large number of gaskets obtained by cutting are captured at the same time as cutting the laminate, the manufacturing efficiency is improved, and the gasket is improved. The manufacturing cost can be reduced.
[Brief description of the drawings]
FIG. 1 is a plan view of a gasket of Example 1. FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1. FIG. 3 is a diagram for explaining a manufacturing process of the gasket of Example 1. The figure for demonstrating the manufacturing process of a gasket. [FIG. 5] The figure for demonstrating the manufacturing process of the gasket of Example 1. [FIG. 6] The figure for demonstrating the manufacturing process of the gasket of Example 1. [FIG. The figure for demonstrating the manufacturing process of the gasket of Example 1. [FIG. 8] The figure for demonstrating the manufacturing process of the gasket of Example 1. [FIG. 9] The figure for demonstrating the manufacturing process of the gasket of Example 1. 10 is a cross-sectional view of the main part showing the usage state of the gasket of Example 1. FIG. 11 is a cross-sectional view of the main part showing the use state of the gasket of Example 1. FIG. 12 is an enlarged view of the main part of FIG. 11 is an enlarged view of the main part of FIG. 11. FIG. FIG. 15 is a plan view of the gasket of Conventional Example 1. FIG. 16 is a cross-sectional view taken along the line BB of FIG. 15. FIG. FIG. 19 is a cross-sectional view taken along the line C-C in FIG. 18. FIG. 20 is a cross-sectional view of the main part showing the usage state of the gasket of the conventional example 2. FIG. [FIG. 22] An enlarged view of the main part of FIG. 20 [Explanation of symbols]
G ₁ , G ₂ gasket 1 annular holding plate 2 annular rubber plate 2a cylindrical hole 3 ridge 4 concave groove 5 member 5a hole 6 nut 7 bolt 7a head 7b shaft 7c screw 11 steel plate 12 deformed hole 13 rubber S laminate 14 1st cutting blade 15 2nd cutting blade K Punching blade a Convex wall body b Concave wall bodies 16, 18 Electromagnet 17 Lower mold 21 Steel plate with spring performance

Claims (2)

The manufacturing method of the gasket used for the sealing between a volt | bolt and its attachment member characterized by providing the process of following (1)-(4).
(1) to a metal plate, is the inner uneven peripheral surface, the inner circumference of a circle in contact with the tip of the convex portion between the adjacent profiled bore of the gear type, and larger than the diameter of the bolt, the profile holes A process that can be formed in large numbers at regular intervals.
(2) A step of integrally forming rubber on both surfaces of a metal plate in which a deformed hole is formed to obtain a laminate of the metal plate and rubber in which the deformed hole is filled with rubber.
(3) Using a cylindrical first cutting blade and a cylindrical second cutting blade larger than the first cutting blade, the laminated body is cut coaxially and annularly around the axis of the deformed hole of the metal plate. A small cylindrical blade having a diameter smaller than the diameter of a bolt formed by a plurality of convex wall bodies provided in the length direction at regular intervals on the wall body as the first cutting blade; The process of using what has the large cylindrical blade of the same diameter as the diameter of the volt | bolt formed with the concave wall body between the said protruding item | line wall bodies provided in.
(4) A step of capturing an annular gasket obtained by cutting the laminate in an annular shape at the same time as the cutting and pulling it up from the laminate, and then releasing the capture. The manufacturing method of the gasket used for the sealing between a volt | bolt and its attachment member characterized by providing the process of following (1)-(5).
(1) The diameter of the inner circumference circle that touches the tips of adjacent convex portions of the gear-shaped deformed holes with irregularities on the inner circumferential surface is made larger than the diameter of the bolt on the steel plate, and the deformed holes are made constant. Processes that can be formed at many intervals
(2) A step of imparting spring performance by performing quenching and tempering after forming the periphery of the irregular hole of the steel sheet having the irregular hole into a corrugated shape hot or cold.
(3) A step of integrally forming rubber on both sides of a spring steel plate having a modified hole imparted with spring performance to obtain a spring steel plate and rubber laminate in which the modified hole is filled with rubber.
(4) A step of coaxially cutting the laminated body around the axis of the deformed hole of the steel sheet coaxially with a cylindrical first cutting blade and a cylindrical second cutting blade larger than the first cutting blade. The first cutting blade is a small cylindrical blade having a diameter smaller than the diameter of the bolt formed by a plurality of protruding wall bodies provided in the length direction at regular intervals on the wall body, The process of using what has the large cylindrical blade of the same diameter as the diameter of the volt | bolt formed with the concave wall body between the provided protruding wall bodies.
(5) A step of capturing an annular gasket obtained by cutting the laminated body into an annular shape at the same time as cutting and pulling it up from the laminated body, and then releasing the capture.

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