Abstract

The invention relates to a punching tool (1), in particular a cutting line (1), for dividing or perforating planar materials and to the production of the tool. In order to create a punching tool (1) having improved characteristics, in particular for automatic finishing in a flatbed punching machine and/or rotary punching machine, the punching tool (1) is formed from a heat treated and/or quenched and tempered steel strip, on the narrow sides of which a back part (2) is formed on one side, the back part having a contour that is convex in the cross-section or a contour comprising several projecting convex areas (21, 2'), said contour having recesses (4) in some places, said recesses being formed transversely to the longitudinal extension and perpendicularly to the side surfaces by cold forming or stamping with no chip formation and with free expansion of the material, wherein the extent of the expansion (B) is less than the thickness (D) of the steel strip, and the undeformed areas between the recesses can be plastically deformed during the commissioning of the tool.

IPC Classes  ?

• B23P 15/40 - Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools shearing tools
• C21D 9/22 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for drillsHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for milling cuttersHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for machine cutting tools
• B21D 37/20 - Making tools by operations not covered a single other subclass

Abstract

The invention relates to a saw blade, in particular for reciprocating saws, for cutting stone. The problems of economical saw cut generation in a stone block, composed preferably of hard stone, for raw board production are primarily those of minimizing the cut width at high cutting power, and ensuring low loading of the saw device, such as reciprocating saws. The solution according to the invention to the problems is characterized in that, in a clamped, operationally ready state of the saw blade, its cut-producing narrow side of the cross section of the basic body has in longitudinal extent a curved form deviating from the movement path of the saw in the saw frame, or the connecting line of the working surfaces of the cutting means or cutting elements on the curved narrow side of the basic body is formed so as to deviate from the movement path of the saw.

IPC Classes  ?

• B23D 61/12 - Straight saw bladesStrap saw blades
• B28D 1/12 - Saw blades specially adapted for working stone

Abstract

The invention relates to a rod part (1) having a large longitudinal extension and a closed band part or blade part, in particular a saw blade or a saw band, having increased stiffness and/or dimensional stability and/or strength, which properties are created by recesses (2) introduced in the surface area (11) of the part (1) by means of a stamping tool in the longitudinal direction by pressing in order to form different, local material stresses in the rod or blade (1), described by a person skilled in the art as a part having roller burnishing or stress. In order to keep the properties stable during long-term operation and at high loads of a rod part or blade part, in particular of a saw, according to the invention at least one of the recesses (2) on the rod surface is formed in the longitudinal direction from two spaced impressions (3, 3') extending parallel to each other to form a web (4) between the impression edges (31, 31') with the stipulation that the web surface (41) or the intermediate area between the impressions (3, 3') of the recess is substantially at or above the level of the undeformed rod surface (12) of the part.

IPC Classes  ?

• B23D 61/02 - Circular saw blades
• B23D 61/12 - Straight saw bladesStrap saw blades
• B23D 65/00 - Making tools for sawing machines or sawing devices for use in cutting any kind of material
• B21H 7/00 - Making articles not provided for in groups , e.g. agricultural tools, dinner forks, knives, spoons

Abstract

The present invention relates to a cutting line (1) comprising a steel band (10) having a cutting edge (20), a back of the steel band (10) opposite the cutting edge (20), wherein the back (30) comprises protrusions (32) that can be plastically deformed upon first use of the cutting line (1), and the protrusions (32) substantially comprise a height h of 30% - 70% of the thickness D of the steel band (10). The present invention further relates to a cutting line (1) comprising a steel band (10) having a cutting edge (20), a back (30) of the steel band (10) opposite the cutting edge (20), wherein the back (30) comprises protrusions (32) that can be plastically deformed upon first use of the cutting line (1), and the protrusions (32) are generated in the back (30) by milling or grinding recesses (36) in the transverse direction Q of the steel band (10); and a cutting line (1), the back (30) of which is edge decarburized, in order to be able to deform plastically upon first use of the cutting line (1).

IPC Classes  ?

• B26F 1/44 - Cutters thereforDies therefor

Abstract

A bimetallic strip 1 having a portion comprising a supporting strip material 10 and a portion comprising a cutting material 8 is produced by a process comprising the following steps: inserting intermediate sheets 5 comprising the cutting material 8 into a casting mould 3, pouring a molten metal 6 comprising the supporting strip material 10 into the casting mould 3, wherein the intermediate sheets 5 only partially melt and, during solidification, enter into a metallurgical bond with the poured-in supporting strip material 10 and form a cast ingot, removing the cast ingot 12 from the casting mould 3, rolling the cast ingot 12 to form a composite strip 14, wherein the composite strip 14 alternately has portions comprising supporting strip material 10 and portions comprising cutting material 8, and dividing the composite strip 14 through the portions comprising cutting material 8 to form a plurality of bimetallic strips 1. The invention also relates to the use of a bimetallic strip of this kind for producing saw blades, saw bands or coating blades.

IPC Classes  ?

• B23D 61/12 - Straight saw bladesStrap saw blades
• B23D 65/00 - Making tools for sawing machines or sawing devices for use in cutting any kind of material
• B32B 15/01 - Layered products essentially comprising metal all layers being exclusively metallic
• B23P 15/28 - Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools
• B22D 19/06 - Casting in, on, or around, objects which form part of the product for manufacturing or repairing tools

Abstract

The present invention relates to a method for the production of saw blades or saw bands (1, 2) made of a base component (30), wherein the method comprises the following steps: (a) providing a band-shaped base component (30) having two carrier band section (32, 34) that are connected to a cutting material section (36) disposed therebetween, (b) separating the base component (30) into two partial bands (1, 2) by means of a separating cut (42, 44) through the cutting material section (36), (c) chipping the partial bands (1, 2) such that the desired cutting contour (4) is obtained directly, wherein the separating and the chipping are carried out as a continuous process on the same system. In one variant, the method comprises the following steps: (a) providing a first carrier band (32) and a second carrier band (34), (b) disposing cutting segments (38) between the carrier bands (32, 34), (c) welding successive cutting segments (38) to the first carrier band (32) and the second carrier band (34) in an alternating manner such that two partial bands (1, 2) are created, (d) chipping the partial bands (1, 2) such that the desired cutting contour (4) is obtained directly, wherein the welding and the chipping are carried out as a continuous process on the same system.

IPC Classes  ?

• B23D 65/02 - Making saw teeth by punching, cutting, or planing
• B23D 65/04 - Making saw teeth by milling

Abstract

The present invention relates to a rotational cutting line (1) for use of a rotational punching machine, having a steel band (10) with a cutting edge (20) and two side faces (12), wherein the cutting edge (20) has a secondary facet (30) and cutting teeth (40) and the transition (32) between the secondary facet (30) or the side face (12) and flanks (44) of the cutting teeth (40) is rounded off by polishing.

IPC Classes  ?

• B26D 1/00 - Cutting through work characterised by the nature or movement of the cutting memberApparatus or machines thereforCutting members therefor

Abstract

The present invention relates to a method of producing initial components (15, 25) for saw blades or saw bands, comprising the following steps: (a) arranging a strip (30) made of a cutting material for a cutting edge of saw blades or saw bands free of play between the edges (12, 22) of a first (10) and a second carrier band (20); (b) directing a laser or electron beam (40) along a first edge (32) of the strip (30) for gradually welding the first carrier band (10) to the strip (30), wherein regions (36) along the first edge (32) of the strip (30) remain unwelded; (c) directing a laser or electron beam (40) along a second edge (34) of the strip (30) for gradually welding the second carrier band (20) to the strip (30), wherein regions (36) along the second edge (34) of the strip (30) remain unwelded; and (d) directing a laser beam, water jet or electron beam (50) between the first edge (32) and the second edge (34) of the strip (30) or between the second edge (34) and the first edge (32) of the strip (30) for separating the strip (30) into segments (31).

IPC Classes  ?

• B23D 65/00 - Making tools for sawing machines or sawing devices for use in cutting any kind of material
• B23D 65/02 - Making saw teeth by punching, cutting, or planing

Abstract

A bimetallic doctor blade (1) has a support strip (20) made of conventionally produced steel and a working edge (10) made of a steel produced by a powder metallurgical process. Also disclosed is a method for producing this type of bimetallic doctor blade (1), wherein a flat wire is produced from metal powder by a powder metallurgical process, and the flat wire is then welded to a conventionally produced support strip (20) made of steel in order to form a bimetallic doctor blade with a support strip (20) and a working edge (10).

IPC Classes  ?

• D21G 3/00 - Doctors
• B23K 31/02 - Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by any single one of main groups relating to soldering or welding
• C22C 33/02 - Making ferrous alloys by powder metallurgy

Abstract

The invention relates to a preliminary material (1) for a stone gang saw (2), in particular for processing bright types of stone, comprising a steel strip support (10) having a plurality of slots (20) in the centre stip of the steel strip support (10), wherein the steel strip support (10) is produced essentially from an austenitic steel.

IPC Classes  ?

• B23D 61/12 - Straight saw bladesStrap saw blades
• B28D 1/12 - Saw blades specially adapted for working stone
• B23D 65/00 - Making tools for sawing machines or sawing devices for use in cutting any kind of material
• B23D 61/14 - Straight saw bladesStrap saw blades with inserted saw teeth