JP5108160B2 - Cutting tool with multi-layered fine-structured cutting edge and manufacturing method thereof - Google Patents

Description

  The present invention relates to a cutting tool with a multi-layer microstructure blade tip formed by processing and processing a multi-layer multi-blade structure blade element mold and a method for manufacturing the same.

  In general, blades such as knives, knives, and scissors are used to form a blade-shaped die by metallizing a mild steel material called a clad layer on at least one surface of a thick hard material that serves as a core, and then cutting the blade according to the shape. Is formed with a blade.

  In general kitchen knives for home use and business use, the sharpness does not last semipermanently, and it is necessary to revive the sharpness by maintaining the grinding. However, even with skilled techniques, it is extremely difficult to stabilize the angle of the blade with respect to the grindstone and to maintain the curve of the blade in polishing from both the front and back surfaces of the blade.

  Patent Document 1 discloses a pure titanium-titanium alloy clad blade in which a core layer is composed of an α + β type titanium layer and a clad layer is composed of an α type pure titanium layer. The core layer and the clad layer are made of a steel material or stainless steel. Etc. may be configured. Alternatively, Patent Document 2 discloses a blade for coating a hard surface layer such as ceramic or diamond on a base material via an interface layer.

  However, all of these blades have a core layer (base material) that is much thicker than the cladding layer or surface coating layer, so it is extremely difficult to maintain the blade edge sharply and maintain good sharpness. It was difficult. Also, it is almost impossible to polish to a blade edge thinner than the core layer unless a skilled craftsman is used.

  In addition, blades that display various layered patterns such as speckled patterns and damascus patterns on the surface are useful as high-grade blade materials. However, with such blades having a core layer, the decorative pattern at the corners is exposed to the core layer. There was dissatisfaction that it became a halfway appearance because it cut off at the cutting edge portion.

  In order to solve such a problem of designability, the invention of Patent Document 3 states that “stainless steel materials 1 (1a, 1b...) Are alternately stacked and rolled while being heated by a hot rolling mill. The clad substrate A having a predetermined thickness is formed by metallurgical integration, while the clad substrate A is forged to form a concavo-convex portion U on the surface, and then the entire clad substrate A is heated to cut the blade substrate B. Forming a temporary blade portion S ′ on one edge portion E by grinding the uneven surface, and then etching the entire surface of the blade substrate B with an acidic liquid agent, By corroding the relatively base stainless steel part exposed on the surface and changing the color for each region defined by the layer boundary line L, a hue difference is created and a spotted pattern and a damascus pattern are created on the surface. , The temporary blade S ' Forming a sharp edge portion S to raise grinding, the layers boundary L allowed to form to the Surudoha portion S ", discloses a process for producing coreless cladding decorative knives.

  Since this coreless clad decorative blade has a multilayer laminated structure of stainless steel base materials without the core layer, it is possible to solve the difficulty that the sharp cutting edge generated in the blade including the core layer cannot be polished. However, as can be seen from Table 3 described in Patent Document 3, it is difficult to say that sharpness has been dramatically improved over the conventional product.

  Further, in claim 1 of Patent Document 3, “... after forging the clad base material A to form the uneven portion U on the surface, the entire clad base material A is heated to cut the blade substrate B. To form a temporary blade S 'on one edge E ", and thereafter" etch the entire surface of the blade substrate B with an acidic liquid agent " By corroding the relatively base stainless steel portion exposed on the surface and changing the color for each region defined by the layer boundary line L, thereby creating a speckled pattern and a damascus pattern on the surface. "Creates these layer boundary lines L up to the sharp blade portion S" only by creating and sharpening the temporary blade portion S 'to form the sharp blade portion S ". However, referring to FIG. 8 (Patent Document 3), the layer boundary Mottled and Damascus surface pattern which is determined by L is, the cutting edge (Surudoha section S) to unlikely to be formed is extended. Further, referring to FIG. 10 (Patent Document 3), it cannot be confirmed that the spotted pattern and the damascus pattern are formed in the blade edge (sharp blade portion S) portion, and is determined by the layer boundary line L. It is considered that the method described in Patent Document 3 is insufficient to form a speckled pattern and a damascus pattern on the surface clearly on the blade edge (sharp blade portion S).

JP 2002-971 A JP-A-6-304820 JP 2011-161064 A

  Therefore, the present invention provides a cutting tool that can be easily re-ground and permanently cut by processing and processing a multi-layered structure metal plate that does not require a core layer, without requiring maintenance or skill. An object of the present invention is to provide a cutting tool with a multi-layered fine-structured cutting edge that clearly shows a ripple pattern consisting of a speckled pattern and a damascus pattern up to the cutting edge.

The cutting tool with a multi-layer fine structure cutting edge according to the present invention is composed of two or more types of material layers, and the same type of material layers are laminated so as not to be continuous with each other, and an uneven mold is provided. A cutting tool having a cutting blade, a core, a front surface, a back surface, a blade edge, and a ridge, which are processed and processed a multi-layered metal plate that has been pressed with a high pressure by a press die and transferred to the surface thereof. said front and back of the portion corresponding to the cutting edge side of the multilayer structure the metal plate is locally cold forging to form ripples push plate having a ripple pattern superimposed random hole in the uneven pattern, press the ripples At least the surface of the multi-layered multi-pattern structure blade body type in which the ripple pattern is expressed to the cutting edge obtained by molding a plate is sharply finished from the ridge toward the cutting edge to form a margin, the surface side said cutting edge of said surpasses formed in Polished to a form a cutter blade which is mirror-finished, after immersing the cutter blades corrosive liquids, further polishing the cutting edge side of the small blades, multi-layer cross-sectional structure of exposed the back surface ripples pattern Appeared on the blade, a multi-layered fine cutting edge with different kinds of material layers laminated and exposed was attached.
The ripple pressing plate is formed by providing an uneven mold on a press die when the multilayer structure metal plate is entirely pressed at a high pressure, and transferring the uneven pattern onto the surface of the multilayer structure metal plate for processing and processing. A ripple pattern consisting of a speckled pattern and a damascus pattern can be roughly expressed on the entire surface of the ripple pressing plate. Furthermore, by locally cold forging a portion corresponding to the blade edge side of the multilayer metal plate, the cutting tool according to the present invention with the multilayer microstructure blade edge can be completed.

  The edged tool with a multilayer microstructure edge according to the present invention was formed by immersing the edge in a corrosive solution and further polishing the edge side of the edge.

  In the cutting tool with a multi-layered microstructure cutting edge according to the present invention, at least the small blade on the surface can be exposed by laminating different types of material layers from the cutting edge toward the ridge.

  The cutting tool with a multilayer microstructured blade edge according to the present invention sharpens from the ridge toward the blade edge on the back surface in addition to the front surface of the multilayer multi-blade structure blade type to form a margin. May be.

Method of manufacturing a blade out that with a multilayer microstructure blade according to the present invention is constituted by two or more layers of material, laminated on substantially the same thickness so as not to continuously of the same type of material layers to each other, the type of irregularities A multi-layer structure metal plate in which the uneven pattern is transferred to the surface by pressing the entire surface with a press die having a high pressure, and portions corresponding to the blade edge side on the front and back surfaces of the multi-layer structure metal sheet are locally provided Forming a ripple pressing plate having a ripple pattern in which random holes are superimposed on the uneven pattern by cold forging, and forming the ripple pressing plate to produce a cutting blade, a core, a front surface, a back surface, and a cutting edge Forming a multi-layered multi-blade structure blade element in which the ripple pattern is expressed to the blade edge having a ridge, and at least the surface of the multi-layer multi-blade structure blade body type from the ridge toward the blade edge Sharpen and finish Forming, and forming a small blade and mirror-polishing the cutting edge side of the surpasses formed on the surface side, a step of immersing at least the cutter blades corrosive liquids, further wherein the cutter blades of A step of polishing the blade edge side to reveal a ripple pattern on the back surface, appearing on the small blade, and forming a fine structure in which different kinds of material layers are laminated and exposed; , Including.

  It is desirable that the step of forming the small blade includes at least the step of immersing the small blade in a corrosive liquid and the step of polishing the blade edge side of the small blade to form a fine structure.

  The cutting tool with a multilayer microstructure blade edge according to the present invention is formed by processing and processing a multilayer metal plate in which two or more kinds of material layers are laminated in substantially the same thickness so as not to be continuous with each other. The cutting edge with no layer can be easily sharpened and the grinding is easily repaired.

  The multi-layered multi-blade blade type is obtained by locally forging the edge of both sides of the multi-layered metal plate to form a rippled push plate and molding it. The design (ripple pattern consisting of a speckled pattern and a damascus pattern) is formed to induce the user and the viewer to be aesthetically pleasing. By polishing the blade edge, the rippled multi-layered cross-section that appears by laminating different types of material layers from the blade edge to the ridge emerges each time polishing, and the pattern changes You can have fun and observe changes in structure.

  If the blade edge side of the multi-layered multi-blade structure blade type surface is sharply polished, a multi-layer microstructure blade edge in which the ripple pattern on the back side (multi-layer structure cross section) appears directly on the blade edge is obtained. Micro and sharp structures that could not be obtained can be realized. In addition, since the rippled pressing plate is formed by locally cold forging the cutting edge sides on both sides of the multilayer metal plate, unlike the etching process of the concavo-convex surface disclosed in Patent Document 3, a fine and delicate spot pattern A ripple pattern (multi-layer structure cross section) composed of a damascus pattern can be expressed up to the blade tip.

  Furthermore, since the blade of the present invention has immersed a multi-layered multi-blade structure blade type blade with two or more types of material layers having different erosion degrees in the corrosive liquid, the boundary between the early and late layers of corrosion, That is, the cross section of the multilayer structure rises more steeply, the stepped structure of the multilayer fine structure cutting edge can be made clearer and sharper, and the long-lasting property and sharpness can be further enhanced.

  The cutting tool with a multi-layer microstructure edge according to the present invention has a staircase structure with a thin multi-layer structure blade edge, so that the sharpness is sharpened by sharpening the edge especially in single-sided grinding where only the surface is ground. It is extremely easy to maintain so as to keep it good, and it has high functionality because it can be easily reground without the need for skilled techniques.

(A) The side view of the cutting tool (a ripple pattern is abbreviate | omitted) which attached the multilayer fine-structure blade edge | tip which concerns on this invention. (B) The top view of the cutting tool which attached the multilayer fine-structure cutting edge which concerns on this invention. (A) The perspective view of the multilayer structure metal plate which concerns on this invention. (B) The perspective view of the ripple pressing board which concerns on this invention. (C) Perspective view of a multi-layered multi-pattern structure blade type according to the present invention. FIG. 3 is an enlarged side view of a multilayer microstructure cutting edge according to the present invention. (A) The side view of the cutting tool which attached the multilayer fine-structure cutting edge which concerns on this invention. (B) The side view of the margin part of the cutting tool which attached the multilayer microstructured blade edge | tip which concerns on this invention. (C) The cross-sectional schematic diagram of the multi-layered multi-pattern structure blade type | mold which concerns on this invention.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a cutting tool with a multi-layered microstructure cutting edge according to the present invention will be described with reference to the drawings. Hereinafter, the same reference numerals are used for the same components throughout the drawings.

  As shown in FIGS. 2 (a) to 2 (c), the cutting tool 1 with a multilayer microstructured cutting edge according to the present invention is composed of two or more kinds of material layers so that the same kind of material layers do not continue to each other. A multilayered metal plate 500 (FIG. 2 (a)), which is laminated to substantially the same thickness and pressed at a high pressure, is processed and processed, as shown in FIG. 2 (c). This is a cutting tool 1 (FIG. 4A) having a back surface 60, a blade edge 10 and a ridge 20.

  When the multi-layered metal plate 500 (FIG. 2A) is formed by pressing the laminated material layers at a high pressure, an uneven mold is provided in the press die, and the uneven pattern is formed on the multi-layered metal plate 500. By transferring to the surface and processing / processing, a ripple pattern composed of a spotted pattern and a damascus pattern can be roughly expressed on the entire surface of the ripple pressing plate 510 (FIG. 2B).

  Further, at least portions corresponding to at least the blade edge 10 side of the front surface 50 and the rear surface 60 of the multilayer structure metal plate 500 are locally cold forged to form a ripple pressing plate 510 (FIG. 2B), and the ripple pressing plate 510. Is molded to obtain a multi-layered multi-blade structure blade type 520 as shown in FIG. As described above, a rough ripple pattern appears even when an uneven mold is provided in the press mold when the multilayer structure metal plate 500 is entirely pressed and the uneven pattern is transferred to the multilayer structure metal plate 500. As described above, a multilayer multi-pattern structure in which a more delicate and individual ripple pattern (spotted pattern and damascus pattern) is expressed on the cutting edge 10 by locally cold forging a portion corresponding to the cutting edge 10 side as described above. A blade type 520 can be obtained.

  Subsequently, as shown in FIG. 1 (a), at least the surface 50 is sharply finished from the ridge 20 toward the blade edge 10 to form a margin 14, and the edge 14 side of the edge 14 is polished and mirror-finished. To form a multilayer microstructure edge 100 (FIG. 3). Although the ripple pattern is omitted in FIG. 1 (a), FIG. 4 (a) shows a cutting tool 1 (side view) with a multi-layer microstructure edge of the present invention expressing a ripple pattern including a spotted pattern and a damascus pattern. It was.

  As described above, by locally cold forging a portion corresponding to the blade edge 10 side, the small blade 12 (multilayer microstructure blade edge 100) having a multilayer microstructure as shown in FIG. 3 can be obtained. In addition to the front surface 50, the back surface 60 (FIG. 1B) may be sharply finished from the ridge 20 toward the cutting edge 10 to form the shikino 14 ′ (FIG. 4C).

  In the blade 1 with the multi-layer microstructure cutting edge 100 of the present invention, at least the small blade 12 on the surface 50 has different material layers 101 from the cutting edge 10 toward the ridge 20 as shown in FIG. ˜108 and the like are laminated and displayed in a ripple pattern. Each time polishing, the surface of the blade 12 is shaved, and new rippled multi-layer cross-sections appear one after another, so that the change in the pattern can be enjoyed and the change in the structure can be observed.

  That is, in the cutting tool 1 with the multilayer microstructure blade edge according to the present invention, the ripple edge plate 510 is formed by locally cold forging the blade edge 10 sides of both surfaces of the multilayer metal plate 500. Unlike the uneven surface etching process disclosed in 1), a ripple pattern (multi-layer structure cross section) composed of a fine and delicate spot pattern and damascus pattern can be expressed up to the end of the blade edge 10.

  Further, it is more desirable to immerse the small blade 12 in a corrosive liquid such as hydrochloric acid and further polish the blade edge 10 side of the blade 12 to obtain the punched blade 1 with the multilayer microstructure blade edge 100 attached thereto. Since the blade 12 of the multi-layered multi-blade structure blade type 520 in which two or more material layers having different erosion levels are laminated is immersed in the corrosive liquid, the boundary between the early corrosion layer and the slower layer, that is, the multilayer structure cross section is more It is possible to stand up steeply and to make the stepped structure of the multi-layered fine-structured cutting edge 100 sharper and sharper, and to further improve the long-lasting property and sharpness. At the same time, the ripple pattern (spot pattern and damascus pattern) exposed to the edge of the blade edge 10 can be more clearly revealed.

  When the blade 12 is formed only on the surface 50 of the multi-layered multi-blade structure blade 520 and the blade edge 10 side is immersed in a corrosive solution and then sharpened, the ripple pattern on the back side (multi-layer cross section) appears as it is on the blade edge. A microstructure edge 100 is obtained. The multi-layered fine-structured cutting edge 100 has a structure in which a very thin material layer is expressed in a step-like manner as compared with a conventional core layer, so that the structure including the core layer is not microscopically sharp. A structure can be realized.

  Next, the manufacturing method of the blade 1 with the multilayer microstructure edge 100 will be described.

The manufacturing method of the cutting tool 1 with the multi-layer microstructure edge 100 according to the present invention includes:
(A) Step of preparing a multi-layered metal plate 500 that is composed of two or more types of material layers, laminated with substantially the same thickness so that the same types of material layers do not continue to each other, and pressed entirely at high pressure (b) (C) forming the ripple pressing plate 510 by locally cold forging at least the surface 50 of the structural metal plate 500 on the cutting edge 10 side; and forming the ripple pressing plate 510 to form the cutting blade 30, the core 40 and the surface. A step of forming a multi-layered multi-blade structure blade element mold 520 having 50, a back surface 60, a blade edge 10, and a ridge 20. (D) At least the surface 50 of the multi-layer multi-blade structure blade element mold 520 is directed from the ridge 20 toward the blade edge 10. (E) A step of polishing the blade edge 10 side of the margin 14 to form a mirror-finished small blade 12 is included.

Furthermore, the manufacturing method of the blade 1 with the multi-layer microstructure blade edge 100 is as follows:
(F) At least the step of immersing the blade 12 in a corrosive solution (g) It is desirable to further add a step of polishing the blade edge 10 side of the blade 12 to form a fine structure.

  The manufacturing process will be described in more detail below.

Step (a)
(1) A multi-layer structure metal plate 500 that is entirely pressed at 100 to 800 t is prepared. At this time, an uneven mold may be provided in the press die, and the uneven pattern may be transferred to the multilayer structure metal plate 500.
Step (b)
(2) At least the surface 50 of the multilayer structure metal plate 500 is locally cold forged at room temperature using a belt hammer or the like to obtain a rippled pressing plate 510. Cold forging may be performed over the entire surfaces 50 and 60 of the multilayer structure metal plate 500.
Step (c)
(3) The ripple pressing plate 510 is molded to form a multi-layered multi-pattern sword body mold 520 having the cutting blade 30, the core 40, the front surface 50, the back surface 60, the cutting edge 10 and the ridge 20.
Step (d)
(4) The multi-layer multi-blade structure blade element mold 520 is heated to approximately 900 ° C. to 1200 ° C. and then air-cooled at room temperature to be hardened (quenching of stainless steel).
(5) The multi-layered multi-blade structure blade element mold 520 is heated to about 180 ° C. for about 30 minutes or more, and is gradually cooled (tempering).
(6) The surface 50 or both surfaces 50, 60 of the obtained multilayer multi-pattern structure blade element mold 520 are sharply finished toward the cutting edge 10 to form the sword 14 (14 ′) (rough grinding / medium grinding).
Step (e)
(7) The edge of the blade tip 10 is carefully ground on the surface 50 of the multi-layered multi-blade structure blade type 520 (Shinogi 14), and the small blade 12 is formed. At this point, the blade edge 10 side of the blade 12 may be further finely polished to form the multilayer microstructure blade edge 100 (FIG. 3).
Step (f)
(8) It is preferable to accelerate the corrosion by immersing both sides of the multi-layered multi-blade structure blade 520 (Shinogi 14 (14 ')) in a corrosive liquid (for example, hydrochloric acid) for 30 minutes or more.
Step (g)
(9) The blade edge 10 side of the blade 12 is further finely polished to form the multilayer microstructure blade edge 100 as shown in FIG.

  In the step (b), it is preferable that the forging edge 10 side of the back surface 60 of the multilayer structure metal plate 500 is also locally cold forged. In the step (b), the back surface 60 of the multilayer multi-pattern structure blade element mold 520 is used. In this case, sharpness 14 '(FIG. 4C) may be formed by sharpening from the ridge toward the cutting edge. The step (d) (4) is a quenching process in the case where the multilayer structure metal plate 500 is made of stainless steel. If the multilayer structure metal plate 500 is made of iron or steel, “(4) ' Apply mud on both sides of the structural blade mold 520, heat to approximately 800 ° C to 850 ° C, and then quench with water to harden (hardening of iron and steel), or room temperature for other materials In some cases, a quenching method can be appropriately selected according to the material and the situation.

  Next, the concavo-convex pattern transferred in step (a) and the ripple pattern by local cold forging in step (b) will be described with reference to FIGS. 4 (a) is a side view of the cutting tool 1 with a multilayer microstructure edge according to the present invention, and FIG. 4 (b) is a side surface of a margin 14 portion of the knife 1 with a multilayer microstructure edge according to the present invention. FIG. 4 and FIG. 4C are schematic views of the AA cross section of FIG.

  More specifically, FIG. 4A shows a multi-layered material layer in which a rippled pattern (multi-layer structure cross section) composed of a spot mold pattern and a damascus pattern formed by a press die and local cold forging is formed on the entire surface 50. A multi-layer microstructure blade edge formed by forging and polishing a multi-layer multi-blade structure blade element mold 520 by sharpening, sharpening the ridge 20 from the ridge 20 toward the blade edge 10, and further polishing the blade edge 10 side. 1 shows a cutting tool 1 of the present invention with 100. The surface 50 is exposed by laminating different types of material layers from the blade edge 10 toward the ridge 20 in a ripple pattern (damascus pattern), and fused with a multi-circular pattern (spot pattern) of depression holes. A design is formed (a ripple pattern consisting of a speckled pattern and a damascus pattern). That is, the wavy pattern gradually changes from sparse to dense toward the cutting edge 10 from the ridge 20, while the multiple circular pattern (spotted pattern) changes from large to small and from dense to sparse. As a whole, the gradation of the multi-circular pattern, the multiplicity and the sparse density, and the sparse density of the wavy pattern express a gradation that gradually changes from the ridge 20 toward the blade edge 10. The cutting edge 10 also represents a multilayer microstructure that weaves the spotted pattern and damascus pattern.

  Moreover, FIG.4 (b) is the side view which extracted only the pattern of the part of the margin 14 of the cutting tool 1 which attached the multilayer fine-structured blade edge | tip of Fig.4 (a). Since local cold forging was performed in addition to the uneven press die, a large number of multiple circular recessed holes were formed on the entire surface 50. And even if it grinds toward the blade edge 10 from the ridge 20 and finishes sharply to form the shimashi 14, different kinds of material layers are laminated in a ripple shape on the edge 14 from the blade edge 10 toward the ridge 20. A multi-layered microstructure that is interwoven with multiple circular patterns of depressions and interspersed with speckled and damascus patterns is revealed. That is, also in the portion of Shinogi 14, the wavy pattern gradually changes from sparse to dense from the ridge 20 toward the cutting edge 10, while the multiple circular pattern (spotted pattern) changes from large to small and from dense to sparse. As a result, a gradation in which the size of the multiple circular pattern (spotted pattern), the multiplicity and the sparse density, and the sparse density of the wavy pattern gradually change from the ridge 20 toward the blade edge 10 is expressed. Therefore, even in the portion of the blade edge 10 that forms the tip of the Shinogi 14 portion, there is a multilayer microstructure in which the spot pattern that remains thinly and a damascus pattern that appears substantially parallel to the blade edge so as to surround the same Expressed.

  As described above, the back surface 60 (see FIG. 1B) in addition to the front surface 50 is also sharpened from the ridge 20 toward the cutting edge 10 to form the front surface 50 and the back surface 60 as shown in FIG. Shinogi 14 and 14 'may be formed respectively. 4 (c) is a schematic diagram of the AA cross section of FIG. 4 (b). Shallow holes a, a, a,... Depressed in the front surface 50 and the back surface 60 at regular intervals are press dies. The deeper holes b, b, b,... That are depressed at random intervals are drawn assuming holes by local cold forging. In FIG. 4 (c), margins 14, 14 'are formed in an oblique direction toward the cutting edge 10. At this time, shallow irregularities due to the press mold are scraped and disappear, but local cooling is caused. It can be seen that a certain number of deep holes b, b, b,. For this reason, in the cutting tool 1 provided with the multi-layer fine structure cutting edge of the present invention, it is considered that a ripple pattern composed of a spotted pattern and a damascus pattern is expressed up to the cutting edge 10.

Hereinafter, test results obtained by performing a sharpness test on four kinds of blades from a conventional blade to a blade having a multi-layer microstructure edge according to the present invention will be shown and compared. The test method is common and is as follows.
[sample]
Cutlery A to D: Commercially available stainless steel core-clad structure metal plates (cutlery A to C) and multilayer structure metal plate 500 (cutlery D) were produced in the same polishing environment / process according to the following conditions.
[Test method]
The blade (sample) was fixed, and a paper equivalent to 7.5 mm newspaper was piled up, and a reciprocating motion of 20 mm was performed while applying a load of about 750 g. The cutting operation was performed 200 times, with one reciprocation being the number of times of cutting, and the number of sheets that were completely cut was counted at the following number of times of cutting.
[Number of cuts measured for sharpness]
1, 2, 4, 8, 16, 32, 64, 100, 128, 150, 200

刃物Ｂ

・刃物Ａ、Ｂは共に同様の素材、構成で、同様の工程を経て製造されている。刃物Ａ、Ｂは共に初期の切断枚数は１００枚程度で、永切れ性の目安となる切断回数１００回目辺りで切断枚数は半分程度に低下している。
・刃物Ａ、Ｂは共に同様の素材、構成であるが、切れ味や永切れ性に差が出たのは、主に試験の方法による誤差に刃物Ａ、Ｂの品質自体のバラつきなどが加味されたものと考えられる。 The blade A shown in Table 1 and the blade B shown in Table 2 are both configured with a three-layer structure including a conventional core layer, and the material of the layers is an alloy of stainless steel for both the core layer and the cladding layer.
The blades A and B are both double-edged abrasives that form and polish the small blades 12 on both sides 50 and 60, and perform the cold forging in the above step (b) and immerse in the corrosive liquid in the step (f). Has not passed.
Cutlery A

Blade B

-The blades A and B are both made of the same material and structure through the same process. In both the blades A and B, the initial number of cuts is about 100, and the number of cuts is reduced to about half when the number of cuts is about 100, which is a measure of permanent cutting.
・ Both cutters A and B have the same material and configuration, but the difference in sharpness and long-lasting properties is mainly due to the error due to the test method and the variations in the quality of the cutters A and B. It is thought that.

・刃物Ｃは、刃物Ａ、Ｂと略同じ構成であるが、片刃砥ぎであるところが異なっている。
・片刃砥ぎとすることにより、各切断回数において切断枚数が刃物Ａ、Ｂの２倍程度に増加し、永切れ性の目安となる切断回数１００回においても刃物Ａ、Ｂの初期の切断枚数である１００枚以上を切ることができた。 The blade C shown in Table 3 is also composed of a three-layer structure including a conventional core layer, and the material of the layers is an alloy of stainless steel for both the core layer and the clad layer.
The blade C is a single-blade grind that forms and polishes the small blade 12 only on the surface 50, and has not undergone the process of performing the cold forging in the above step (b) and immersing in the corrosive liquid in the step (f).
Cutlery C

The blade C has substantially the same configuration as the blades A and B, but differs in that it is a single-blade grind.
・ By using single-edged grinding, the number of cuts increases by about twice the number of blades A and B at each number of cuts, and the initial number of cuts of blades A and B even when the number of cuts is 100, which is a measure for permanent cutting. I was able to cut more than 100 sheets.

・刃物Ｄは、刃物Ｃと同様片刃砥ぎであるが、コア層を持たない多層構造であること、および、ステップ（ｆ）の腐食液に浸漬する工程を経ていることが刃物Ｃと異なる。
・初期の切断回数において、刃物Ｃの更に１．４倍程度の切断枚数が得られ、その後も常に刃物Ｃの切断枚数を上回り、切断回数２００回に至っても、刃物Ａ、Ｂの初期の切断枚数である１００枚程度切断することができた。 The blade D shown in Table 4 is a punched blade with a multi-layer microstructure edge according to the present invention, and the material of each layer is a stainless steel alloy.
The blade D is a single-blade grind that forms and polishes the small blade 12 only on the surface 50, and performs both the cold forging in the step (b) and the step of immersing in the corrosive liquid in the step (f). Yes.
Cutlery D

The blade D is single-edged like the blade C, but differs from the blade C in that it has a multilayer structure without a core layer and has undergone a step of immersing in the corrosive liquid in step (f).
・ In the initial number of cuts, the number of cuts is about 1.4 times that of the blade C, and after that, the number of cuts of the blade C is always higher than the number of cuts of the blade C. About 100 sheets, which is the number of sheets, could be cut.

  As mentioned above, although the cutting tool provided with the multilayer fine-structure cutting edge which concerns on this invention, and its manufacturing method were demonstrated using embodiment and an Example, this invention is not limited to the said embodiment etc. The material for forming the multilayer structure metal plate is not limited to stainless steel, and the multilayer microstructure blade may be formed by forging and polishing a multilayer structure metal plate made of another material. Moreover, the corrosive solution for immersing the multi-layered multi-blade structure blade type margin part is not limited to hydrochloric acid, the type and concentration thereof can be appropriately selected, and the immersion time can be appropriately adjusted.

  In addition, the present invention can be carried out in a mode in which various improvements, modifications, and changes are added based on the knowledge of those skilled in the art without departing from the gist thereof.

  The cutting tool with a multi-layered fine-structured cutting edge according to the present invention can be used for general instruments with blades such as knives, knives, and scissors.

1: Cutting tool 10 with multi-layer fine structure cutting edge 10: Cutting edge 12: Small blade 14, 14 ': Shino 20: Wing 30: Cutting blade 40: Core 50: Front surface 60: Back surface 100: Multi-layer fine structure cutting edge 101-108 : Material layer 500: Multi-layer structure metal plate 510: Rippled plate 520: Multi-layer multi-pattern structure blade type

Claims (2)

2 is composed of more than one material layer, the same kind of material layers stacked on substantially the same thickness so as not to continuously mutually the entire press to the surface the uneven pattern at high pressure by a press die having a mold of irregularities A multi-layer structure metal plate transferred to a cutting blade and core, having a cutting edge and a core, and a front and back surface, a cutting edge and a ridge,
Forming a ripple pressing plate having a ripple pattern in which random holes are superimposed on the uneven pattern by locally cold forging portions corresponding to the blade edge side of the front and back surfaces of the multilayer metal plate;
At least the surface of the multi-layered multi-blade structure blade element type in which the ripple pattern is expressed up to the cutting edge obtained by molding the ripple pressing plate, sharply finishes from the ridge toward the cutting edge, and forms a margin.
Forming a cutter blade which is mirror-polishing the cutting edge side of the surpasses formed on the surface side,
After dipping the blade in a corrosive solution, the blade edge side of the blade is further polished, and a multi-layered cross-sectional structure that reveals the ripple pattern on the back surface appears on the blade. A cutting tool with a multi-layered fine-structured edge that is expressed by laminating layers in a ripple pattern . 2 is composed of more than one material layer, the same kind of material layers stacked on substantially the same thickness so as not to continuously mutually the entire press to the surface the uneven pattern at high pressure by a press die having a mold of irregularities Preparing a multilayer structure metal plate transferred to
Forming a rippled pressing plate having a ripple pattern in which random holes are superimposed on the uneven pattern by locally cold forging portions corresponding to the blade edge side of the front and back surfaces of the multilayer metal plate;
Forming the ripple pressing plate to form a multi-layered multi-pattern structure blade element in which the ripple pattern is represented up to the cutting edge, the core, the front surface, the back surface, the blade edge, and the ridge;
Forming at least the surface of the multi-layered multi-blade structure blade type sharply from the ridge toward the cutting edge to form a margin;
Polishing the blade edge side of the margin formed on the surface side to form a mirror-finished small blade;
Immersing at least the blade in a caustic solution;
Further, a multi-layer cross-sectional structure that polishes the blade edge side of the small blade and exposes the ripple pattern on the back surface appears on the small blade, and different types of material layers are displayed in a ripple pattern. Structuring steps;
A manufacturing method of a cutting tool with a multi-layer fine structure cutting edge including

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