CN103003005A - Method for producing a knife with a bolster - Google Patents

Abstract

The present invention relates to a method for manufacturing a knife (1) having a blade (2), a finger support (3) and a handle, particularly a handle (4), forged from a single piece of flat steel material (5), wherein, prior to forging, the flat material (5) is upset into a protrusion (6) in the area between the blade (2) and the handle or handle (4), the longitudinal axis (LW) of the protrusion being arranged transversely to the longitudinal axis (LM) of the knife and subsequently formed by forging into a finger support (3), the finger support having at least one side edge (K2) inclined to the longitudinal axis (LM) of the knife, wherein the longitudinal axis (LW) of the protrusion (6) to which the finger support will be formed is inclined to the longitudinal axis (LM) of the knife (1).

Description

Method for making a knife with a finger rest

technical field

The invention relates to a method for the manufacture of a knife with a blade, a finger rest and a handle, in particular a hilt, forged from a single piece of flat steel material, wherein the flat material is forged between the blade and In the region between the handle or handle, a raised portion is formed by forging, the longitudinal axis of which is arranged transversely to the longitudinal axis of the knife, and thereafter formed by forging into a finger rest, which has at least one Axis placement of side edges.

Background technique

For the manufacture of knives with finger rests/knobs (Kropf), it is known to forge the knife from a single piece of flat material, which is first forged into a raised portion in the region, which is then subsequently The forging is formed into a finger support. If the fingers are to be inclined to the longitudinal axis of the knife, or to the longitudinal direction of the knife, high deformations must be provided during forging, since large quantities of material have to be driven into the body of the knife. Forging can therefore lead to insufficient shape filling and thus to an unstable process, resulting in high quantities of rejects.

Contents of the invention

The object of the invention is to improve a method of the type mentioned at the outset in such a way that the volume of the bead is predistributed so well that an optimum material quantity distribution and shape filling is achieved during forging.

This object is solved according to the invention in that the longitudinal axis of the projection which will form the finger rest is oriented obliquely to the longitudinal axis of the knife.

The method according to the invention achieves that the material for the finger braces is optimally provided prior to forging, so that less deformation processing is required during forging. Therefore, lower forces are necessary in order to push the material especially towards the cutting edge during forging. The material is less stressed and more styling possibilities arise with regard to the design of the finger rest and blade geometry. Additionally, cost savings are achieved through less manufacturing time and less scrap.

It is preferably provided for this that the longitudinal axis of the projection forms an angle of 5 to 60 degrees with the longitudinal axis of the knife. It is particularly advantageous if the longitudinal axis of the projection forms an angle of 15 to 35 degrees with the longitudinal axis of the knife.

In one embodiment, the two side edges of the projection transverse to the longitudinal axis of the knife are parallel to one another. Alternatively, it is provided that the two side edges of the projection transverse to the longitudinal axis of the knife are arranged so as to extend close to one another. In this case, the two side edges of the bead have a greater or smaller distance from one another in the region of the back of the blade than at the opposite end of the bead.

It is preferably provided that the side edge of the first raised portion facing the knife handle forms a greater acute angle with the longitudinal axis of the knife than the side edge of the second raised portion facing the knife edge. The side edge of the first raised portion facing the handle of the knife forms an acute angle of 50 to 90° with the longitudinal axis of the knife, and the side edge of the second raised portion facing the blade forms an acute angle of 30 to 80° with the longitudinal axis of the knife.

It is also advantageous during production if the region of the flat material adjoining the inclined protrusion side edge ( R1 or R2 ) is arranged obliquely relative to the remaining region of the flat material by means of the upset of the protrusion.

Description of drawings

Embodiments of the present invention are described in more detail below. In the picture:

Figure 1 shows a flat material made of steel for the manufacture of knives;

FIG. 2 shows a flat material with upset projections oblique to the longitudinal direction;

FIG. 3 shows a upset flat material with forged knives drawn therein.

Detailed ways

In order to manufacture the knife 1 with the blade 2, the finger rest 3 and the handle 4 (on which the handle shell will be fixed in the future), a piece of flat material 5 made of steel is upset in a known manner in the middle region Forged into a raised portion 6. In the known method here, the longitudinal axis LW of the projection 6 which will form the finger support 3 and the two side edges R1 and R2 of the projection 6 are arranged at right angles to the longitudinal axis LF of the flat material 5 . If a finger support 3 is to be produced which is arranged obliquely with respect to the longitudinal axis LM of the knife, the material of the projection 6 is significantly stressed during the subsequent forging of the flat material 5 into the knife 1 . In such an inclined finger rest, at least the finger rest side edge K1 facing the cutting edge 2 is inclined to the knife longitudinal axis LM or to the knife longitudinal direction and the finger rest extends with a region 3 a into the cutting edge 2 .

In the method according to the invention, the projection 6 is arranged obliquely to the longitudinal axis LF, so that the longitudinal axis LW of the projection 6 and the projection side edges R1 and R2 form an angle of less than 90° with the longitudinal axis LF of the flat material alpha. Here, LW, R1 and R2 are parallel to each other and the angle is 5 to 60 degrees, preferably 15 to 35 degrees.

Alternatively, in a non-illustrated embodiment, the two side edges R1 , R2 of the projection 6 transverse to the longitudinal axis of the knife are arranged so as to extend close to one another. In this case, the two side edges R1 , R2 of the bead 6 are at a greater or smaller distance from one another in the region of the back of the blade than at the opposite bead end. In this case, the first raised side edge R1 facing the knife handle forms a greater acute angle with the knife longitudinal axis LM than the second raised side edge R2 facing the knife edge 2 has. Here too, the first raised side edge R1 facing the knife handle and the knife longitudinal axis LM can form an acute angle of 50 to 90 degrees, and the second raised side edge R2 facing the knife edge 2 can also form an acute angle with the knife longitudinal axis LM. Acute angles of 30 to 80 degrees.

It can be seen in FIG. 3 how the side edges of the finger rests are arranged in an inclined finger rest 3 . The first finger support side edge K1 facing the knife handle 4 is substantially at right angles to the knife longitudinal axis LM and the second finger support side edge K2 is inclined to the knife longitudinal axis, the angle α1 being approximately equal to the angle α in the flat material 5 . Thus, the side edges K1 and K2 run close to each other, and the side edges R1 and R2 can also be formed in a similar manner to run close to each other in the projection 6 , corresponding to the above-mentioned, not shown embodiment.

Oblique upsetting is achieved by pressing the flat material together unevenly during the upsetting process or by pressing the flat material together as before in parallel and producing an oblique upsetting here by using special electrodes . The electrodes are designed in such a way that no precise “parallel” heating takes place in the blank, but rather the electrodes heat the blank in different defined regions, so that the desired oblique upset is achieved.

Claims (9)

1. for the manufacture of the method for cutter (1), this cutter is with blade (2), refer to support (3) and handle, handle of a knife (4) particularly, formed by a unique flat steel material (5) forging, wherein, before forging with the zone of described flat material between blade and handle or handle of a knife in upsetting become lug boss (6), the longitudinal axis of this lug boss (LW) arranges transverse to cutter longitudinal axis (LM) and is finger support (3) by forging molding after this, this refers to that support has at least one and favours the lateral edges (K2) that cutter longitudinal axis (LM) is settled, it is characterized in that, form in the future the longitudinal axis (LW) that refers to support 3 lug boss (6) and favour cutter (1) longitudinal axis (LM) orientation.

2. in accordance with the method for claim 1, it is characterized in that the longitudinal axis (LW) of lug boss (6) forms 5 to 60 angles (α) of spending with cutter longitudinal axis (LM).

3. in accordance with the method for claim 1, it is characterized in that the longitudinal axis of lug boss (LW) forms 15 to 35 angles (α) of spending with cutter longitudinal axis (LM).

4. according to the described method of one of the claims, it is characterized in that two lateral edges (R1, R2) transverse to cutter longitudinal axis (LM) of lug boss (6) are parallel to each other.

5. according to the described method of one of claims 1 to 3, it is characterized in that two lateral edges (R1, R2) transverse to the cutter longitudinal axis of lug boss (6) are mutually drawn close and extended the ground setting.

6. in accordance with the method for claim 5, it is characterized in that, described two lateral edges (R1, R2) of lug boss (6) in the zone of the knife back than on opposed lug boss end, having each other larger or less spacing.

7. in accordance with the method for claim 6, it is characterized in that, compare larger acute angle with the second lug boss lateral edges (R2) towards blade (2) with its angle with cutter longitudinal axis (LM) formation towards the first lug boss lateral edges (R1) of cutter handle.

8. in accordance with the method for claim 7, it is characterized in that, the first lug boss lateral edges (R1) towards the cutter handle forms 50 to 90 acute angles of spending with cutter longitudinal axis (LM), and towards the second lug boss lateral edges (R2) of blade (2) and the acute angle of cutter longitudinal axis formation 30 to 80 degree.

9. according to the described method of one of claim 5 to 8, it is characterized in that, utilize the upsetting to lug boss (6), settle with respect to all the other regional dip ground of flat material in the zone of the lug boss lateral edges that is adjacent to inclination (R1 or R2) of flat material.

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