JPH03128083A - Manufacture of pointed knife of cloudy mosaic pattern - Google Patents

Abstract

PURPOSE:To increase the efficiency of manufacture by stratifiedly laminating butting plate materials of colored metal and noncolored metal every one layer as nonquenchable metal plate material on the upper and lower surfaces of a blade steel plate material, and joining them by the clad method, and after punching, forging, grinding, quenching, and tempering, by performing finish working. CONSTITUTION:When several kind of nonquenchable metal plates are alternately stacked for integrating on the upper and lower surfaces of a blade steel plate material 1, butting plate materials of colored metal and noncolored metal are stratifiedly laminated every one layer as nonquenchable metal plate material, and the laminated blade steel plate material 1 and the nonquenchable metal plates are joined by the clad method for obtaining a laminated metal plate C containing the blade steel plate 1. Then, knife original patterns are punched from this laminated metal plate, and after having been forged, ground, and corrected in a knife shape having a handle part H and a blade part B, they are quenched, tempered, and further are subjected to blade working and polishing working. Thus, pointed knives of a cloudy mosaic having different color tones in the handle part and in the blade part can be efficiently mass- produced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a method for manufacturing a cutting knife, and more particularly, to a cutting knife in which both a handle portion and a blade portion are integrally made of metal materials. This invention relates to a method of manufacturing a decorative knife that can form a beautiful cloud pattern on the surface of the knife.

[Prior Art and Technical Issues to be Solved] As is well known, conventionally commonly used knives include "folding knives" in which the blade is folded into the sheath like a jackknife. J and a sheath knife, in which the blade part and the handle part are made of a metal material.
ted knife) J. However, in the case of "folding knives" such as the Tsuyatsuku Knife, the outer surface of the sheath, which also serves as the handle, can be decorated, and this type of product form is approved on the market, so there are only minor complaints. is not asked.

However, since the latter knife is made entirely of metal, the handle is made of natural wood,
It is necessary to attach a decorative handle part that can be gripped by processing deer antler, ivory, etc., but this increases the production cost and also makes it unsightly as dirt adheres to the attachment part of the decorative handle. This shortcoming was pointed out. However, the ancient Japanese traditional "Gassan-ryu"
If you apply this technique, you can create a ``disturbed pattern'' on the blade, and you can also use Damascus steel.
), you can create a Damascus pattern like a Damascus sword (dα
However, in both cases, the pattern formed is achromatic because it is created by combining ferrous metals such as hard steel and mild steel. In addition, the handle and blade tended to have the same color and pattern, resulting in a lack of variability.

The present invention has been made in view of the current state of the conventional cutting knife decoration technology as described above. The technical challenge is to provide a new method for mass production.

[Means adopted to solve the problem]

The means adopted by the present inventor to solve the above technical problem will be described below with reference to the accompanying drawings.

That is, in the present invention, in laminating and integrating a plurality of types of non-hardenable metal plates that do not harden even after being subjected to quenching temperatures, on the upper and lower surfaces of the blade steel plate l', As the non-hardenable metal plate material to be used, a butted plywood plate material made by butting colored metal and achromatic metal is arranged hierarchically in every other layer, and these laminated blade steel plate materials 1' and non-hardenable metal are used. The plates are joined and integrated by the cladding method to obtain a laminated metal plate C having a blade steel layer 1, and then a knife prototype is cut out from this laminated metal plate, and the cut knife prototype is subjected to forging and grinding. After shaping into a knife shape having a handle part H and a blade part B, it is hardened and tempered, and then final finishing processes such as cutting edge processing and polishing are performed. A series of steps in which a chromatic cloud pattern appears on the surface of either the handle portion H or the blade portion B, and an achromatic cloud pattern appears on the remaining surface by the turbostratic effect caused by plastic deformation and the exposure effect caused by grinding. By adopting this metal processing method, it became possible to efficiently manufacture a cutting knife with a cloud-shaped pattern in which the handle and blade parts were different in color.

〔Example〕

Hereinafter, the present invention will be described in more detail according to embodiments shown in the accompanying drawings. In addition, Figure 1 is a perspective view of a state in which multiple types of non-hardenable metal plates are stacked above and below the blade steel plate, and Figure 2 is a laminate obtained by joining and integrating the various metal plates shown in Figure 1. A perspective view of a metal plate, FIG. 3 is an exaggerated perspective view of a knife prototype obtained by cutting out the laminated metal plate of FIG. 2, and FIG. FIG. 2 is a perspective view schematically showing a cutting knife having a cloud-shaped pattern obtained by quenching and tempering.

In the drawing, what is designated by the code 1' is a blade steel plate material, and in this example, V special No. 2 (Takefu special steel material = Luo product name: chemical composition C = 1.0 to 1.1%, Cr = 0 .2~0.5%
, W = 1.0 to 1.5 X, balance Fe and other unavoidable impurities) Hard steel material is adopted. This blade steel plate material 1' is subjected to a rolling process as described below, and forms a blade steel layer 1 when it is joined and integrated with a non-hardenable metal plate material to form a laminated metal plate.

Next, what is indicated by the code 2 is the chromatic metal plate 21.
2 and an achromatic metal plate 23. In this embodiment, the chromatic metal plate 21 is made of red copper (JIS C1220), and the chromatic metal plate 22 is made of golden brass (JIS C1220). JIS C4622) has been adopted.

Further, as the achromatic metal plate 23, light gray stainless steel (JIS SUS 430) is used.

Those indicated by the reference numeral 3 are non-hardenable metal plates, and unlike the butted plates, each is a single metal plate. In this embodiment, the non-hardenable metal plate 3 is made of extremely soft steel (SAE
1008) is adopted.

In the method of this embodiment, the metal plates 1', 2, and 3 described above are stacked in the order shown in Figure 1, the ends are sealed and welded, and then placed in a heating furnace and heated to 850-870'C. When the laminated metal plate C (thickness 1
0 mm, width 200 mm) was obtained. In FIG. 2, the part designated by the symbol C+ is a chromatic cloud-shaped pattern forming region where the bonding layer of the chromatic metals 21 and 22 exists, and the part indicated by the symbol C
The area designated by 8 is an achromatic cloud-shaped pattern forming area in which a bonding layer of the achromatic metal 23 is present.

Next, as shown in FIG. 2, the laminated metal plate C is cut out using a press into a knife shape (represented by a two-dot chain line in the drawing) so that the tip is located in the achromatic cloud pattern forming area C3. A knife prototype M as shown in FIG. 3 is obtained.

The knife prototype M obtained in this way was subjected to forging, grinding, cutting, quenching, and tempering.As shown in Fig. A very beautiful cutting knife was produced, which exhibited a chromatic cloud-shaped pattern ranging from red (bronze red), and the blade part B exhibited an achromatic cloud-shaped pattern woven with shades of silver and gray. By the way,
In this example, quenching was performed at approximately 830°C, and tempering was performed at approximately 22°C.
The test was carried out at 0°C.

Although the method of this embodiment is generally as described above, the present invention is by no means limited to the above-mentioned embodiment, and various changes can be made within the scope of the claims.
In particular, the combination of chromatic metals adopted in the method of the present invention can be selected in various ways according to the user's preferences such as color tone and contrast. Of course, it is possible to partially limit the parts (such as the head, pommel, and end of the pommel), and it is also possible to easily change the coloring by bringing it into contact with chemicals. , it goes without saying that all of them belong to the technical scope of the present invention.

[Effects of the present invention]

As explained above using the examples, according to the method of the present invention, it is possible to extremely efficiently create a cloud-shaped pattern of different colors on the handle portion and the blade portion of the cutting knife. This makes it possible to efficiently and inexpensively mass-produce a cutting knife having a cloud-shaped pattern with high design value.

Furthermore, the cutting knife produced by the method of the present invention is
Both the handle and blade parts are completely integrated and have no seams, so there is no weld bead formed as in the case where colored Damascus steel and achromatic Damascus steel are joined together by welding. The finished product is beautiful, and unlike traditional sheath knives with decorative handles carved with deer antler, there is no dirt or dust attached to the attachment part, so it can be kept beautiful forever, and it is also hygienic. It can be said to be ideal.

As described above, according to the present invention, it is possible to freely distinguish between a chromatic cloud pattern and an achromatic cloud pattern, which was completely impossible with conventional methods, and to display them on the handle and blade of the cutting knife. Therefore, it will greatly contribute to the improvement of cutlery cosmetic technology.

4,

[Brief explanation of the drawing]

Figure 1 is a perspective view of a blade steel plate with multiple types of non-hardenable metal plates stacked above and below it, and Figure 2 is a laminated metal plate obtained by joining and integrating the various metal plates shown in Figure 1. A perspective view of
Fig. 3 is an exaggerated perspective view of a knife prototype obtained by punching the laminated metal plate of Fig. 2, and Fig. 4 shows the knife prototype subjected to forging, grinding, and blade processing, and then quenching and tempering. FIG. 2 is a perspective view showing an outline of a cutting knife having a cloud-shaped pattern obtained by the above-mentioned method. l...Blade steel layer, 1'...Blade steel plate material, 2...
Butt metal plate material, 21, 22... Colored metal, 23...
...Achromatic metal, 3...Single non-hardenable metal plate. B: Blade portion, C: Laminated metal plate, C+: Handle forming area, C1: Blade forming area, H: Handle portion.

Claims (2)

[Claims] (1) When stacking and integrating multiple types of non-hardenable metal plates that do not harden even when subjected to quenching temperatures on the upper and lower surfaces of the blade steel plate 1', the laminated non-hardenable metal plates are As hardenable metal sheets, butted plywood sheets made of colored metal and achromatic metal are interposed in a hierarchical manner in every other layer, and these laminated blade steel sheets 1' and non-hardenable metal sheets are rolled. A laminated metal plate C having a blade steel layer 1 is obtained by joining and integrating the laminated metal plate C by a method, and then, from this laminated metal plate, a chromatic cloud pattern forming area C_1 including a chromatic metal layer is formed in the area where the handle portion is to be formed. Position them so that they match, cut out the knife prototype,
After performing forging and grinding on the cut knife prototype to form a knife shape having a handle part H and a blade part B, it is then quenched and tempered, and then subjected to blade processing and polishing. By applying final finishing processes such as, a chromatic cloud pattern is created on the surface of the handle portion H and an achromatic cloud pattern is created on the blade portion B due to the turbostratic effect caused by plastic deformation and the exposure effect caused by grinding. A method for manufacturing a cutting knife having a cloud-shaped pattern, characterized by the fact that it can be cut out. (2) When stacking and integrating multiple types of non-hardenable metal plates, which do not harden even when subjected to quenching temperatures, on the upper and lower surfaces of the blade steel plate material 1', the laminated non-hardenable metal plates are As hardenable metal sheets, butted plywood sheets made of colored metal and achromatic metal are interposed in a hierarchical manner in every other layer, and these laminated blade steel sheets 1' and non-hardenable metal sheets are rolled. A laminated metal plate C having a blade steel layer 1 is obtained by joining and integrating the laminated metal plate C by a method, and then, from this laminated metal plate, an achromatic cloud pattern forming area C_2 including an achromatic metal layer is formed in the area where the handle portion is to be formed. After positioning and cutting out the knife pattern so that they match, forging and grinding the cut knife pattern into a knife shape having a handle part H and a blade part B, quenching and baking are performed. By performing back treatment and final finishing such as cutting and polishing, an achromatic cloud-shaped pattern is formed on the surface of the handle H due to the turbostratic action caused by plastic deformation and the exposure action caused by grinding. , and blade part B
1. A method for manufacturing a cutting knife having a cloud-shaped pattern, characterized in that a chromatic cloud-shaped pattern is produced.