DE2005089A1 - Cutting element and process for its manufacture - Google Patents

Description

Dr. Müller-Bor6 Dr. Manitz _: D--.
Dipl.-Ing. Finsterwald ■ Dipl.-Ing. Qrämkov

Patent attorney

^ h. Feb 1970

Lw / gä - J 1026

Intercontinental Machinery Corporation New York, USA

Cutting element and method of its manufacture

The invention relates to a cutting element for use in cutting patterns in materials in web or film form, preferably in a plurality of superimposed layers, by means of shearing machines of the band saw type, which work with an endless Säineidelement, or in the form of fretsaws and similar shearing machines or cutting tools Cutting elements for this purpose are known in the form of band saws or band knives, but they are only able to cut essentially in the direction of the plane of the band and therefore have certain limitations with regard to the curvature of the z * ocfineidetiden contours are also known in all directions, which are essentially wire-shaped and have a cutting edge in the form of a steep spiral, but such tendon elements work satisfactorily only with a limited selection of materials j iu.i3.ii imü. are difficult

009832/1825 _ßAD original

Keep in order.

These disadvantages are avoided by the cutting element according to the invention, which is characterized by a wire carrier with a firmly anchored Uterzug made of particles of one or more carbides. Tests have shown that a wire-shaped cutting element cuts properly in all materials that can be selected for this kind of cough using machines or tools of the type mentioned above; the cutting is performed essentially as grinding operation and can any desired shape and curvature to be made with very high speed and precision along contours, as h, the cutting element operates equally well in all directions.

According to the invention, the carrier can consist of a steel wire exist, the diameter of which: according to the type of the material to be machined and the desired cut is selected; this diameter can be between 0.2 and 10 mm.

Experiments have shown that, after a certain period of time, an unexpected breakage of such a sonic element occurred, which consists of a wire carrier with a coating of hard carbide particles. This "disadvantage erf can indung £ ge <sur fa £ be remedied, in which a 'is used rager» one in an outer tubular housing umachlcsBenei: comprises core, sin lubricant or release agent Iiierr "wisehen pre rather!"' Ure, for example MoIyoäänäiaulpaid. This often prevents them from doing so. len working pressure to the individual particles or grains basket effect produced deivaii, over the ^entire: rahtquerschnitt spread). The local stresses or stresses emanating from the individual particles and grains only act on the outer casing, whereas the core cross-section is evenly distributed through άί? voltage applied to the cutting element

^009832/1826 BADO «G.NAL

is burdened «without accumulating tension of notch effects (notch sensitivities).

Particles of any “febid” which are suitable for use as the active substance can be used for the active substance Sole adhesive is free and has the necessary hardness, resistance to wear and tear, to the surface of the carrier wire to be tied.

According to the invention , it is particularly advantageous to use carbides of silicon, boron and / or tungsten. The grain sizes depend on the type of material to be cut and the desired fineness of the cut made . According to the invention, the grain sizes can be between 50 and 500 ρ m. The invention also relates to methods aur manufacture of cutting elements dec type mentioned above "

Such a method aeichnet check erfincrungsgerr.äß by the fact that particles of silicon carbide and / or boron carbide and silvered chemically nickel-plated by an electrolytic process and afterwards were soldered to a Stahldrabtträger with tin. On dieae V / ei.ijc wl.vö. get a safe and reliable anchoring of the fast and abrasive hard particles.

According to another method, tungsten carbide particles are used according to the invention on a steel wire rope by means of a silver alloy soldered on.

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009832/1825

BATH ORIGINAL

element of the desired outer diameter and then drawn is coated with cartridge particles.

A cutting element according to the invention can be in the form of a Piece of wire of suitable finite length provided and

be used in this form; also can Ends of one or a plurality of these lengths can be joined together by welding, soldering, brazing, or in any other suitable manner to form an endless cutting element. The connections can be made in this way be that the coating becomes practically continuous; or it can be a coating after which the connections are made are over which connections are applied; This is Incidentally, not necessary, since the cutting effect is obtained even if the coating is provided on sections of the cutting element provided at a distance with larger or smaller gaps is provided.

Claims

ORIGINAL INSPECTED

009832/1826

Claims (6)

Claims Cutting element for shearing machines or cutting tools for cutting foil or sheet materials in the desired contour, characterized by a wire carrier with a firmly anchored coating of particles of one or more carbides, 2. Cutting element according to claim 1, characterized in that the wire carrier is a steel wire with a diameter comprised between 0.2 and 10 mm. 3. Cutting element according to claim 1 or 2, characterized gekennzeioh- j net that the wire carrier has a core enclosed in a tubular housing with a core therebetween Has separating or sliding medium, preferably Molypdänsulphid. 4 »Cutting element according to claim 1, 2, 3, characterized in that the coating consists of particles of silicon carbide, boron carbide and / or tungsten carbide. 5, cutting element according to claim 4, characterized in that that the grain sizes of the carbides are between 50 and 500 μm. 6. A method for producing a cutting element according to one of the preceding claims, characterized in that »that Particles of silicon carbide and / or boron carbide are chemically silver-plated and nickel-plated using a galvanic process and then soldered to a steel wire carrier using tin. 7 · Method of making a cutting element according to a of claims 1 to 5, characterized in that particles of tungsten carbide are attached to a steel wire carrier by means of a Silver alloy to be soldered. ; 009832/1826 _ "_. _iMe _ θ. Method «for the production of a neon Inepruch 3 cutting area» characterized in that a core wire is encapsulated in an outer tubular housing with an interposed layer of molybdenum disulphide , the arrangement then being sucked onto the desired external diameter and coated with carbide particles. ORIGINAL INSPECTED 009832/1826