JPS62286633A - Manufacture of dish-shaped seal washer - Google Patents

Abstract

PURPOSE:To form a prescribed dish-shape, and also, to prevent an elastic plate from being peeled off from a metallic plate, and to easily move an original material by sticking the elastic plate to one face of the metallic plate, punching a through-hole, and thereafter, forming a punched part to a dish-shape, and also, punching an external form CONSTITUTION:A metallic plate 11 and an elastic plate 12 are stuck by an adhesive agent 13, and a through-hole 21 is punched in a part of an original material 10 by the first punching male die 30 and the first punching female die 31. Subsequently, by the second punching male die 40 of the elastic plate 12 side and the second punching female die 41 of the metallic plate 11 side, the punched part of the original material 10 is formed to a dish-shape and an external form is punched. After the external form has been punched by the second punching male die 40 and the second punching female die 41, a metallic plate piece 22 is curved to a dish-shape, and also, an elastic plate piece 23 which has been stuck to this piece is also curved and deformed along the metallic plate piece 22, and a dish-shaped seal washer 20 is formed.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a dish-shaped seal washer that is used, for example, when attaching corrugated boards with fasteners such as nails, wood screws, or bolts. Particularly, the manufacturing method is such that a metal plate piece and an elastic plate piece are pasted together, so that one side of the metal plate protrudes outward, so that the whole has a dish shape, and in the center, one side of the elastic plate has a shape with respect to the inner diameter of one side of the metal plate. The present invention relates to an improvement in a method for manufacturing a dish-shaped seal washer having a through hole with a reduced inner diameter.

(Prior Art) Conventionally, as a method for manufacturing this type of dish-shaped seal washer, the method described in Japanese Patent Publication No. 60-8124 is known, for example.

This publication describes a method for manufacturing seal washers including dish-shaped seal washers.

Therefore, the best method for manufacturing a dish-shaped seal washer described in the publication will be summarized.

This process involves pasting an elastic plate onto one side of a metal plate to create a raw material, and a male die for forming and punching the elastic plate and a female die for forming and punching the metal plate. The molding and punching process involves forming the part into a dish shape and punching a through hole in the center, and a male punching die on the elastic plate side and a female punching die on the metal plate side. It consists of a punching process that punches out the outer shape.

By the way, in such a method, a part of the raw material is pressed from both sides by a male mold and a female mold in the molding and punching process, so-called pinching, and molded into a dish shape. .

However, although it is possible to form a plate into a predetermined dish shape using this type of pressing, the elastic plate used as the raw material is compressed more than necessary, so there is a high risk that the elastic plate will separate from the metal plate. there were.

In addition, in the conventional method, the raw material was formed into a dish shape in the forming and punching process, so an external protrusion was formed on the raw material after the same process, and this external protrusion interfered with the next process of punching. Another problem was that it was difficult to move to the punching process.

(Problems to be Solved by the Invention) The present invention was devised in view of the problem of sloping tops and to solve this problem. To provide a method for manufacturing a dish-shaped seal washer in which an elastic plate does not peel off from a metal plate during molding, and the raw material can be easily moved between each process.

(Means for Solving the Problems) The method for manufacturing a dish-shaped seal washer of the present invention includes a pasting process of pasting an elastic plate on one side of a metal plate to use it as a raw material, and a first stamping on the side of the elastic plate. a punching step of punching a through hole in a part of the raw material using a male punching die and a first female punching die on the metal plate side; a second male punching die on the elastic plate side and a second punching die on the metal plate side; It is characterized in that it consists of a forming and punching process in which the punched portion of the raw material is formed into a dish shape using a female punching die, and the outer shape is punched out.

(Function) In the pasting process, an elastic plate is pasted on one side of the metal plate to form the raw material.

In the punching process, a through hole is punched in a part of the raw material using the first male punching die on the elastic plate side and the first female punching die on the metal plate side.

At this time, the raw material elastic plate is expanded outward and punched by the first male punching die, and is then elastically restored.

Therefore, the inner diameter of the through-hole on the elastic plate side is smaller than the inner diameter on the metal plate side.

In the forming and punching process, the punched portion of the raw material is formed into a dish shape by the second male punching die on the elastic plate side and the second female punching die on the metal plate side, and the outer shape is punched out.

At this time, the punched part of the raw material is formed into a dish shape so that the metal plate side protrudes outward, so the elastic plate side is deformed in the direction of diameter reduction. Therefore, the inner diameter of the through hole on the elastic plate side is , is further reduced in diameter.

After the punching process, the raw material has only through holes punched out, so there is no external protrusion, and it can be smoothly transferred to the next process, the forming and punching process, without any hindrance.

In the forming and punching process, the punched portion of the raw material is not compressed from both sides but only pressed from one side, so the elastic plate is not compressed more than necessary.

(Example) Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a process diagram showing an outline of the manufacturing method of the present invention.

The method for manufacturing the dish-shaped seal Watsunya consists of a pasting process 1, a punching process 2, and a forming and punching process 3.

In the pasting process 1, an elastic plate 12 is pasted on one side of a metal plate 11 to form an original plate 10.

In this example, the metal plate 11 is a steel plate with a thickness of approximately 1, and the elastic plate 12 is a synthetic rubber plate with a thickness of approximately 1.5 mm.

The metal plate 11 and the elastic plate 12 are adhered to each other with an adhesive 13, and the adhesive 13 is made of rubber.

In the punching step 2, a through hole 21 is punched in a part of the raw material 10 using a first male punching die 30 on the elastic plate 12 side and a first female punching die 31 on the metal plate 11 side.

In this example, the first male punching die 30 is located above and can move up and down, and has a rod shape with an outer diameter D1.

On the other hand, the first female punching die 31 is located below and fixed, and has a corresponding hole 32 in the center into which the first male punching die 30 is inserted.

As shown in FIG. 2, the raw material 10 that has undergone the pasting process 1 is placed between the first male punching die 30 and the first punching die 30 with the elastic plate 12 facing upward, that is, facing the first male punching die 30. It is sent between the female mold 31 and the female mold 31.

Then, as shown in FIG.
1 is punched out.

At this time, since the elastic plate 12 of the raw material 10 has elasticity,
It is punched out while being pushed outward.

Thereafter, as shown in FIG. 4, when the first male punching die 30 is raised and pulled out from the raw material 10, the elastic plate 12 is elastically restored by the amount that has been pushed outward.

On the other hand, since the metal plate 11 of the raw material 10 has rigidity, it is directly punched by the first male punching die 30.

Therefore, among the through holes 21 punched in the raw material 10, the inner diameter φ1 of the metal plate 11 is approximately the same as the outer diameter D1 of the first male punching die 30, but the inner diameter φ2 of the elastic plate 12 is the same as the outer diameter D1 of the first male punching die 30. One punch male type 3
It is slightly smaller than the outer diameter DI of 0 and the inner diameter φ1 of the metal plate 11, and is so-called reduced in diameter.

In the forming and punching step 3, the punched portion of the raw material 10 is formed into a dish shape using the second male punching die 40 on the elastic plate 12 side and the second female punching die 41 on the metal plate 11 side, and the outer shape is It is punched out.

In this example, the second male punching die 40 is located above and can move up and down, and has a stepped rod shape with a large diameter portion 42 having an outer diameter D2 and a small diameter portion 43 having an outer diameter D3. At the bottom of 42,
A recess 45 in which a blade 44 is to be formed is provided on the outer periphery.

On the other hand, the second female punching die 41 is located below and fixed, and a hole 46 corresponding to the large diameter portion 42 of the second male punching die 40 is provided in the center thereof. ing.

The raw material 10 that has undergone the punching process 2 is placed between the second male punching die 40 and the second female punching die with the elastic plate 12 facing upward, that is, facing the second male punching die 40, as shown in FIG. It is sent between the mold 41 and the mold 41.

In this case, since the raw material 10 has no external protrusion, it can be moved smoothly without any trouble.

Then, as shown in FIG. 6, when the second male punching die 40 is lowered, the small diameter portion 43 is inserted into the through hole 21 of the raw material 10, and the blade 44 is inserted into the elastic plate 12 of the raw material 10. Eat it.

Further, when the second male punching die 40 is lowered, the elastic plate 12 of the raw material 10 is cut to form elastic plate pieces 23 as shown in FIG.
The blade 44 cuts into the metal plate 11.

At this time, the elastic plate piece 23 in the recess 45 of the second male punching die 40
is compressed by the large diameter portion 42 of the second male punching die 40.

On the other hand, the metal plate 11 of the raw material 10 is opened by the hole 46 of the second female punching die 41, and a through hole 21 with an inner diameter φ1 is punched in the center in the punching process 2. , it is in a state where it is easily deformed.

Therefore, the metal plate 11 of the raw material 10 is gradually bent into a dish shape due to the cut made by the blade 44 of the second male punching die 40 and the repulsive force of the compressed elastic plate piece 23. In other words, it is pressed from one side and becomes dish-shaped.

After the outer shape is punched out using the second male punching die 40 and the second female punching die 41, the metal plate piece 22 is punched out as shown in FIG.
is bent into a dish shape, and the elastic plate piece 23 attached thereto is also curved and deformed along the metal plate piece 22 to become a dish-shaped seal washer 20.

At this time, the elastic plate piece 23 is deformed in the diameter reduction direction together with the metal plate piece 22, so that the through hole 21 of the elastic plate piece 23 has an inner diameter of φ
The diameter is further reduced from 2 to an inner diameter of φ3.

The dish-shaped seal washer 20 obtained in this way is the ninth
As shown in the figure, the metal plate piece 22 and the elastic plate piece 23 are pasted together, and the whole has a dish shape so that the metal plate piece 22 side protrudes outward, and the center has an inner diameter φl on the metal plate piece 22 side. On the other hand, the elastic plate piece 23 side has a through hole 21 having a reduced inner diameter φ3.

The dish-shaped seal washer 20 shown in FIG. 9 has an outer diameter φ4 of approximately 20++ m, a total thickness T of approximately 4 mm, a curvature angle of 0 approximately 20 degrees, a metal plate piece 22 having a thickness of approximately 1 m, and an elastic plate piece. The thickness of the through hole 23 is approximately 1.5 g, the inner diameter φl of the through hole 21 is approximately 9 fl, and the through hole 21
The inner diameter φ3 is approximately 7 mm.

Therefore, in order to obtain such a dish-shaped seal washer 20, it is particularly necessary to form a substantially annular recess 4 of the second male punching die 40.
5 and the volume of the annular elastic plate piece 23, that is, the volume ratio is approximately 0.4 (approximately 40%), and the blade 44 of the second male punching die 40 is The angle α is approximately 40 degrees, so that in the forming and punching process 3, the elastic plate 12 is compressed and deformed by the second male punching die 40, and the metal plate 11 is curved into a dish shape.

Although the metal plate 11 has a thickness of approximately 1 fin in the previous embodiment, the thickness is not limited to this, and may be, for example, approximately 0.5 to 3 fins.

Although the metal plate 11 is a steel plate in the previous embodiment, it is not limited to this, and may be an aluminum plate or a stainless steel plate, for example.

Although the elastic plate 12 has a thickness of about 1.5 mm in the previous embodiment, the thickness is not limited to this, and may be, for example, about 1 to 3 m.

Although the elastic plate 12 is a synthetic rubber plate in the previous embodiment, it is not limited to this, and may be, for example, a natural rubber plate or a synthetic resin plate.

Although the adhesive 13 was rubber-based in the previous embodiment, it is not limited to this, and may be, for example, a hot-melt type or an emulsion-based adhesive.

The outer diameter φ4 of the dish-shaped seal washer 20 was approximately 20 mm in the previous embodiment, but is not limited to this, and is, for example, approximately 8 to 5 mm.
It can be set to 0m.

In the previous embodiment, the inner diameter φ3 of the dish-shaped seal washer 20 was approximately 7 fins, but is not limited to this, and is, for example, approximately 3 to 20 fins.
It can be set to ++rm.

Although the curved angle θ of the dish-shaped seal washer 20 was approximately 20 degrees in the previous embodiment, it is not limited to this, and may be approximately 5 to 50 degrees, for example.
It can be set to 30 degrees.

In this case, the recess 45 of the second male punching die 40 and the elastic plate piece 23
All you have to do is change the volume ratio. However, if the volume ratio is 1 or more and the elastic plate piece 23 is not compressively deformed by the second male punching die 40, it will not be curved into a dish shape but will become flat.

In the previous embodiment, the first male punching die 30 and the first female punching die 31 were arranged one above the other, but the present invention is not limited to this, and for example, these may be reversed.

In the previous embodiment, the second male punching die 40 and the second female punching die 41 were arranged one above the other, respectively, but the present invention is not limited to this, and for example, these may be reversed.

First punching male die 30, first punching female die 31, second punching male die 4
0 and the second female punching die 41 were operated individually in the previous embodiment, but the present invention is not limited thereto. The mold 30 and the second male punching mold 40 may be raised and lowered in synchronization.

In the previous embodiment, the second male punching die 40 has an angle α of the blade 44.
is approximately 40 degrees, but it is not limited to this and can be changed as appropriate.

Although the second male punching die 40 is provided with the blade 44 and the recess 45 at the lower part of the large diameter portion 42 in the previous embodiment, the invention is not limited to this, and for example, the lower surface of the large diameter portion 42 may be made flat, Alternatively, it may be made into a dish-shaped protruding surface so that it can be shaped accordingly. In this way, the large dish-shaped seal washer 20 with a curvature angle of 0
can be obtained.

(Effects of the Invention) As described above, according to the present invention, the following excellent effects can be achieved.

(1) In the forming and punching process, the punched portion of the raw material is pressed from one side by the second male punching die and the second female punching die, so that it can be formed into a predetermined dish shape.

However, since the raw elastic plate is not compressed more than necessary, the elastic plate does not peel off from the metal plate.

(2) After the through holes are punched in the punching process, the molding process is performed to form a dish shape and punch out the outer shape, so there is no material that protrudes from the outside after the punching process. Therefore, the raw material can be moved extremely easily to the forming and punching process, and the raw material will not be partially damaged.

(3) After the through-holes are punched out in the punching process, they are formed into a dish shape in the forming punching process, so that the molding can be done with a smaller force corresponding to the amount of punching out the through-holes.

(4) Since a male die and a female die for punching are used in both the punching process and the forming punching process, the structure is simple.

(5) While reducing the inner diameter of the elastic plate side in the punching process,
Since the inner diameter on the elastic plate side is further reduced in the forming and punching process, it is possible to further increase the reduction ratio of the inner diameter on the elastic plate side to the inner diameter on the metal plate side in the through-hole.

[Brief explanation of drawings]

FIG. 1 is a process diagram showing an outline of the manufacturing method of the present invention. FIG. 2 to FIG. 8 are longitudinal sectional views of main parts showing the state of each process. FIG. 9 is a longitudinal sectional view of a dish-shaped seal washer obtained by the manufacturing method of the present invention. 1...Passing process 2...Punching process 3...Molding and punching process

Claims (1)

[Claims] A part of the raw material is pasted on one side of a metal plate to make a raw material, and a first male punching die on the elastic plate side and a first female punching die on the metal plate side are used to make a part of the raw material. A punching process of punching through holes in the material, and a second male punching die on the elastic plate side and a second female punching die on the metal plate side to form the punched part of the raw material into a dish shape and to change the outer shape. A method for manufacturing a dish-shaped seal washer, characterized by comprising a forming and punching process.