JP2001300671A - Manufacturing method of h shaped member and manufacturing method of h shaped key - Google Patents

Abstract

PROBLEM TO BE SOLVED: To manufacture a member of a cross section of a H shape and a key of a cross section of a H shape having key mountains to respective end peripheral parts of the H shape in a high yield, in high productivity and in an easy way. SOLUTION: A cross section shape is extruded from a metal stock 31a by forging, next, the crisscross worked part (key fourth worked part 31g) is pressed in the direction crossing obliquely to the crisscross shape to be bent to a cross section of a H shape, the H shaped key as the H shaped member is manufactured. Further, concerning the H shape key, in a stage when the crisscross shape is extruded, key mountains 33, 34 are formed to respective end edge parts of the crisscross shape of the crisscross worked part (key fourth worked part 31e, key fifth worked part 31f) by press-shearing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing an H-shaped member for manufacturing a member having an H-shaped cross section, and an H-shaped member for manufacturing a key having a key mountain at each end of the H-shaped cross section. The present invention relates to a method for manufacturing a key.

[0002]

2. Description of the Related Art In recent years, for example, in a vehicle key,
The use of the H type is being considered. FIG. 4 shows this H-shaped key 1, which has an H-shaped cross section of an insertion portion 1a inserted into a cylinder lock (not shown) shown in FIG.
By having key ridges 2 and 3 of different shapes (rotationally symmetrical) at the top and bottom and left and right at each edge of the H shape,
Compared to the conventional I-shaped cross-section, which has key ridges only on both side edges, it is superior in terms of security, and
Since the key ridges 2 and 3 are divided into four places, the length of the key can be reduced, and the length of the corresponding cylinder lock can be reduced.

FIG. 6 shows one of the conventional methods of manufacturing the H-shaped key 1. In this case, first,
The key prototype 11a is obtained by punching from a thick metal plate. Next, the insertion portion 1a of the key prototype 11a is cut into an H-shaped cross section (in the figure, turned sideways) to obtain a key primary processed product 11b. After that, the key ridges 2 and 3 are cut and formed at both upper end edges of the H shape of the key primary processed product 11b to obtain the key secondary processed product 11c.

[0004] Then, after that, the key secondary processed product 11
The key crests 2 and 3 are formed by cutting the upper and lower edges of both sides, which are the upper side by inverting the top and bottom of c, to obtain a key final processed product, that is, the key 1 described above. As shown in FIG. 4, a knob 5 is mounted on the head 4 of the key 1 thus manufactured by, for example, insert molding of a synthetic resin.

FIG. 7 shows another conventional method of manufacturing the H-shaped key 1. In this case, first,
Most of the cylindrical metal material except for one end is extruded into a H-shaped cross section by forging, and a key primary processed product 2
Obtain 1a. Next, the remaining one end of the key primary processed product 21a is crushed by forging to form the head 4 to obtain a key secondary processed product 21b.

Thereafter, the tip of the key secondary processed product 21b is cut into a tapered shape by press working to obtain a key tertiary processed product 21c. Thereafter, the key ridges 2 and 3 are cut and formed at both upper end edges of the H shape of the key tertiary product 21c to obtain the key tertiary product 21d.

Then, further, the key quaternary product 21
The key ridges 2 and 3 are formed by cutting the upper and lower end edges, which have been turned upside down, to obtain the key final product, that is, the key 1 described above. As described above, the knob 5 is mounted on the head 4 of the key 1 thus manufactured by, for example, insert molding of a synthetic resin.

[0008]

According to the former method of manufacturing a conventional H-shaped key, according to the former method, the key original form 11a is punched out of a metal plate, and the thickness of the metal plate is large. If the distance between the punching portions is small, the deformation due to the punching is likely to spread to the respective punching portions. In order to avoid this, as shown in FIG. 8, the width (beam width) W of the remaining portion between the punched portion 7 of the metal plate 6 and the punched portion 7 is used.
And the yield of the material was poor.

Further, since the key primary processed product 11b having the H-shaped cross section is formed by cutting, there is not a small amount of wasted material, and the material yield is also poor. Furthermore, the formation of the key primary processed product 11b by cutting and the formation of the key ridges 2 and 3 by the same cutting also took time, resulting in poor productivity.

On the other hand, according to the latter, a key primary processed product 21a having an H-shaped cross section is formed by forging a cylindrical metal material into a H-shaped section.
The portion of the mold corresponding to the narrow portion 22 between the folds extruded into the H shape and the H shape becomes narrow, and it is difficult to maintain the strength of this portion. 21a
Was difficult to process.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an H-shaped member which can manufacture a member having an H-shaped cross section with a good yield of material, and which can be easily manufactured with good productivity. And a key having a cross section H-shaped and having key ridges at each edge of the H-shape can also be manufactured with good material yield, and with good productivity.
Another object of the present invention is to provide a method of manufacturing an H-shaped key which can be easily manufactured.

[0012]

In order to achieve the above object, a method of manufacturing an H-shaped member according to the present invention comprises extruding a metal material into a cross-shaped cross section by forging, and then forming the cross-processed product into a cross-shaped and oblique shape. And presses in a direction intersecting to bend into a H-shaped cross section.

According to this method of manufacturing an H-shaped member, the H-shaped member can be manufactured by extrusion and bending by forging.
There is no poor material yield, such as from punching or cutting. In addition, there is no inefficiency caused by cutting. Furthermore,
The cross shape of the cross-processed product is different from the H shape in that the portion between them is not narrow, and the corresponding mold portion is wide, and it is easy to maintain the strength of this portion.
Can be easily processed.

In the method of manufacturing an H-shaped key according to the present invention, a metal material is extruded into a cross-shaped cross section by forging, and a key mountain is formed at each cross-shaped edge of the cross-processed product by pressing. It is characterized in that the cross-processed product is pressed in a direction obliquely intersecting the cross shape and is bent into an H-shaped cross section. According to the method of manufacturing the H-shaped key, in addition to having the same advantages as the above-described method of manufacturing the H-shaped member, the key ridge can be formed by the shearing of the press, and therefore, the manufacturing can be performed more efficiently.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the method of the present invention will be described below with reference to FIGS. In this embodiment, H
Although the present invention relates to the method of manufacturing the H-shaped key, the H-shaped key is also an H-shaped member. Therefore, the present embodiment also relates to the method of manufacturing the H-shaped member.

FIG. 1 shows a material 31a of an H-shaped key (H-shaped member), which is made of a metal such as a copper alloy or iron, has a cylindrical shape, and divides a long bar into a large number. You have gained by: From this material 31a, first, most parts except one end thereof are extruded by forging into a cross-shaped cross section (X-shaped in the figure) to form a key 1 which is a cross-processed product.
The next processed product 31b is obtained (first step).

Next, the remaining one end of the key primary processed product 31b is set up by forging to form a head prototype 32, and a key secondary processed product 31c is obtained (second step). Thereafter, the key secondary processing product 31c is positioned so that the cross-shaped portion is correctly cross-shaped, and the left and right ends thereof are cut into a tapered shape by press shearing (trimming) to perform key tertiary processing. An article 31d is obtained (third step).

After that, the tertiary key product 31d is moved to 9
The original upper and lower end portions, which have been rotated right and left by 0 degree, are cut into a tapered shape by the same press shearing (trimming) to obtain a key quaternary product 31e (fourth step). After this, the key quaternary processed product 31e which is a cross processed product
The key ridges 33, 33 are formed on the left and right end edges by press shearing (trimming) to obtain a fifth key processed product 31f (fifth step).

After that, the key fifth-order processed product 31f, which is a cross-processed product, is rotated by 90 degrees to form left and right ends.
Key ridges 34, 34 are formed on the upper and lower end edges by press shearing (trimming).
The next processed product 31g is obtained (sixth step). After that, the key sixth processed product 31g is repositioned so that the cross-shaped portion becomes X-shaped (seventh step).

Then, in this state, the cross-shaped portion of the key sixth processed product 31g, which is a cross-processed product, is crossed obliquely with the cross shape (in this case, the cross-shaped portion of the key sixth processed product 31g is X The direction crossing the cross shape obliquely is the up-down direction or the left-right direction.
The next processed product 31h is obtained (eighth step).

FIG. 2 shows the key sixth processed product 31 at this time.
The state of the change from g to the seventh processed key 31h is shown together with the bending dies 35 and 36. Among them, the bending die 35 fixes the central part 31g1 of the sixth processed key 31g from the left and right. Toward the receiving portion 35a of the mold 35, the whole wing portion 31g of the sixth processed key product 31g is formed by the bending mold 36.
2 is pressed up and down at the base. At this time, the head part 32 of the sixth processed key product 31g is simultaneously crushed to form the head 37.

Thereafter, the H-shaped part of the seventh key processed product 31h is further vertically pressed to correct the H-shaped part so as to have a more authentic H-shape. At the same time, the head 37 is further pressed. The genuine head 38 is formed to obtain a key final product, that is, the key 31 (ninth step).

FIG. 3 shows a key processed part 31 at this time.
The state of change from h to the key 31 is shown together with the bending dies 39 and 40.
The central portion 31h1 of the next processed product 31h is fixed from the left and right, and the whole wing portion 31h2 of the key seventh processed product 31h is vertically moved from the root to the tip by the bending die 40 toward the receiving portion 39a of the bending die 39. Press The key 31 manufactured in this manner is then provided with a knob 41 on the head 38.
For example, by insert molding of a synthetic resin.

As described above, in the case of the present structure, in order to manufacture the H-shaped member, extrusion of a cross-shaped cross section by forging from the metal material 31a and subsequent bending in a direction obliquely intersecting the cross shape are performed. As a result, there is no waste of material such as that obtained by conventional punching or cutting, and the yield of material can be improved. or,
In this case, productivity can be improved without inefficiency as caused by cutting. Further, unlike the H shape, the cross shape of the cross processed product is not narrow in the portion 40 (see FIG. 1) between them,
The corresponding mold portion becomes wider, and it is easy to maintain the strength of this portion, so that it can be processed easily.

In addition to producing the H-shaped key, in addition to the above-mentioned advantages, the key ridges 33 and 34 can be formed by shearing the press, so that the production can be performed more efficiently.

In this case, in both of the conventional manufacturing methods, the key ridges 2 and 3 are formed at each edge of the H-shape, and the H-shape is formed as shown in FIGS. Since the upper side and the lower side of ()) are close to each other, if the key ridges 2 and 3 are formed on the upper side by shearing of the press, the key ridges 2 and 3 reach the lower side. In order to avoid this, it is extremely difficult to form the key peaks 2 and 3 only on the upper side by press shearing. Therefore, in both conventional manufacturing methods, each of the H-shaped edges is cut by cutting. Mountain 2,
3 are formed.

In this respect, according to the manufacturing method of the present configuration, the formation of the key peaks 33 and 34 is performed on the key processed product at the stage where the cross section is processed into a cross shape.
The key ridges 33, 33 are formed at both ends of the left and right wings by shearing of a press, and there is no other wing below the ridge, and the other wings are sheared. There is no. Therefore, the key peaks 33 and 34 can be formed as desired by press shearing, and thus can be manufactured more efficiently as compared with the conventional manufacturing method which can only be formed by cutting, thereby improving productivity. Can be further improved.

It goes without saying that the H-shaped member is not limited to the H-shaped key. In addition, the present invention is not limited to the embodiments described above and shown in the drawings, and can be implemented with appropriate modifications without departing from the scope of the invention.

[0029]

As is apparent from the above description, according to the method for manufacturing an H-shaped member of the present invention, a member having an H-shaped cross section can be manufactured with a good yield of material, and with good productivity and easily manufactured. it can. Further, according to the method of manufacturing an H-shaped key of the present invention, a key having a cross section H-shaped and having key ridges at each edge of the H-shape can be similarly manufactured with high material yield,
It can be easily manufactured with good productivity.

[Brief description of the drawings]

FIG. 1 is a view showing an embodiment of the method of the present invention by a change in a planar shape of a key processed product for each process (A) and a change in a cross-sectional shape thereof along a line VV (B).

FIG. 2 is a diagram showing a state of bending of a key processed product;

FIG. 3 is a view showing a state of straightening and bending of a key processed product;

FIG. 4 is a plan view of a key.

FIG. 5 is a sectional view taken along line XX of FIG. 4;

FIG. 6 is a diagram showing a conventional method by a change in a planar shape of a key processed product for each process (A) and a change in a cross-sectional shape thereof along a line YY (B).

FIG. 7 is a diagram showing a different conventional method by a change in a planar shape of a key processed product in each process (A) and a change in a cross-sectional shape thereof along a ZZ line (B).

FIG. 8 is a partial plan view of a metal plate material obtained by punching a conventional key prototype.

[Explanation of symbols]

31a is a metal material, 31e to 31g are keys 4th to 6th
Next processed product (cross-processed product), 33, 34 are key piles, 35,
Reference numerals 36, 39, and 40 indicate bending dies.

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Kazutaka Ukai 3-260 Toyota, Oguchi-cho, Niwa-gun, Aichi Prefecture Inside Tokai Rika Electric Works (72) Inventor Tomohiro Tano 3-260 Toyota, Oguchi-cho, Niwa-gun, Aichi Prefecture (72) Yoshinobu Oyabu 3-260 Toyota, Oguchi-machi, Niwa-gun, Aichi Prefecture F-term (reference) 4E087 AA10 CA11 CA22 DB05 HA80

Claims (2)

[Claims] 1. A cross section extruded from a metal material by forging by means of forging, and thereafter, the cross-processed product is pressed in a direction obliquely intersecting with the cross shape to bend into a H-shaped cross section. Manufacturing method of shaped member. 2. A cross section is extruded from a metal material by forging, and key ridges are formed at each cross-shaped edge of the cross-shaped product by press working. A method of manufacturing an H-shaped key, wherein the cross-section is pressed to bend into an H-shaped cross section.