DE3604181A1 - Disc tool - Google Patents

Abstract

The aim of the invention is to create a highly productive disc tool for the metal-working industry, in particular for cutting off annular workpieces. In accordance with the object, the disc tool, with a novel shape of its outer contour, has a multiplicity of tool cutting edges specially treated against wear and having predetermined breaking points for resetting the cutting edges. Thus the tool already has when it is manufactured all the cutting edges necessary for subsequent use as a cut-off or recessing tool during turning and with the requisite cutting-edge geometry which have undergone appropriate surface treatment. <IMAGE>

Description

Slice measure 1

The invention relates to a disk bit with a novel Shape of its outer contour, for which purpose it is distributed a large number of anti-wear properties around the circumference specially treated chisel cutting edges with predetermined breaking points for repositioning the cutting edges owns. This means that the disc chisel already has everything for the later use as parting or grooving tool in the turning process Cutting with the required cutting geometry with appropriate surface treatment.

The disc chisel is primarily used in the metalworking industry, in particular for parting ring-shaped workpieces from hollow profiles, for example from pipe material. The processing of non-metallic materials is also possible.

Disc-shaped cutting tools as parting or grooving chisels are with regard to the cutout for the design of the cutting edge geometry in two basic ways Embodiments known.

For example, with chisels or grooving chisels, a defined Clearance angle is basically the circumference as a curved free surface and the I '; chisel cutout usually used as a straight rake face (DEP 304 702).

According to the second embodiment, it is centered on the workpiece arranged cutting or grooving chisel a cutout, the free surface on the circumference starting from the main cutting edge above the vertical center line of the chisel, one half of which is undercut and a sloping one, for example Free cut merges, the Spxlfläche formed by the circumferential surface will.

In addition to specific disadvantages, both embodiments have one thing in common Disadvantage that with wear and tear of the cutting edge that has been in use, the next one must first be made by regrinding, vras also through on the circumferential line Distributed bores for the purpose of regrinding the chisel cutting edges cannot be eliminated according to DRP 68 001.

Regrinding requires a relatively high organizational and manufacturing effort as well as conscientious professional work in order to realize the corresponding angles, surfaces and, if necessary, chip breakers for designing the cutting edge geometry In addition, the disk-shaped chisels of the known designs already close the possibility of extensive use of the technologies for special treatment of the surfaces with the aim of reducing wear and thus increasing the service life during their manufacture.

A special treatment after the first regrinding of the chisel edges is either only possible to a limited extent with considerable effort or is function-related does not make sense, as it is, for example, when the layer thickness is increased by coating The layer can flake off on remaining, already coated surfaces with considerable functional disadvantages.

The aim of the invention is to eliminate the disadvantages mentioned by creating a disc chisel with a long service life and consequently low Machine downtime or tool change times and reduction of regrinding effort, thus causing an overall increase in labor productivity.

The object of the invention is to create a disc bit, which already has all cutting edges that will be used later during its manufacture has, in order to meet the qualitative requirements for cutting edge advancement and, on the other hand, all wear and tear during the chisel production Subject edges and surfaces to a wear-reducing or wear-reducing treatment to be able to.

According to the invention, the object is achieved by an advantageously circular, narrow disc chisel with a central receiving bore, plane-parallel collar and a disc width that tapers evenly from the outside inwards on both sides. In both variants, the circumferential circle of the disc chisel is divided into a large number of chisel cutting edges of known cutting geometry, depending on the recessing or cutting depth to be implemented. Each dividing section ends with a V-shaped groove, which merges at the base into a free istich-like shape, designed as a groove. According to the first variant, one flank of the V-groove forms the rake face, according to the second variant the main cutting edge free surface for the next chisel edge, while the incline of the second flank of the V-groove allows access for grinding or other special treatment.

Depending on the selected cutting edge geometry, the cutting edge advancement is required elongated hole-like openings running in the radial or tangential direction intended for the determination of predetermined breaking points.

The invention is explained below using exemplary embodiments. The accompanying drawing shows: Figure 1 - a disc chisel with a curved open face on the circumference Figure 2 - a disc chisel with a curved rake face on the circumference Figure 1 is the disc chisel 1 according to the selected division with a plurality of chisel cutting edges with, for example, free surfaces 2 running on the circumference. The first flank 3 with a fillet 5 as a chip guide step of the V-groove of the first chisel cutting edge forms the rake face 8 for the next chisel edge, vtahrend the second flank 4 of the V-groove corresponding to the required accessibility to the rake face 8 is designed to be inclined to this. Between two fillets 5 is a variant in the tangential direction in each case a slot-like breakthrough 6 available, its remaining webs 7 to the adjacent fillets 5, the predetermined breaking points for moving up the chisel cutting form.

FIG. 2 shows, according to a variant, a disc chisel 1 with the same a plurality of chisel cutting edges, in which the peripheral surface is the rake face 3 forms with chip breaker for the individual chisel cutting edges.

The first flank 3 of the V-groove is the free area 2 of the respective next I; jißelschneide formed, while the second flank 4 of the V-groove accordingly the necessary accessibility to the open space 2 is also carried out inclined to this and, according to the variant, merges into a groove 5 running in the radial direction, with naohorderom web 7 and slot-like opening 6 for determining the Predetermined breaking points.

The described cutting geometries enable them to be produced not only access for grinding, but also special treatment to create a more wear-resistant surface, e.g. by irradiation, by vapor deposition or deposition of hard material layer systems from the vapor or Gas phase, through laser hardening or melting.

List of the reference symbols used 1 Sche disk chisel 2 - Flank 3 - Flank 4 - Flank 5 - Flute 6 - Opening 7 - Land 8 - Rake face

Claims (2)

Claimd 1. Disc chisels advantageously more circular, narrower Execution with centric mounting hole, plane-parallel collar and on both sides disc width tapering from the outside to the inside, characterized in that the Disk chisel (1), according to its division on the circumference, has a large number of chisel cutting edges known cutting edge geometry as well as predetermined breaking points by each division section merges from a V-groove into an undercut-like shape, designed as a hollow groove (5), where the first flank (3) of the V-groove is one element of the next chisel edge, designed as a flank (2) or rake face (8), while the other flank (4) for the machining of the first flank (3) is designed to be inclined to this. 2. Claim according to point 1, characterized in that for 3estimnung the predetermined breaking points between two fillets (5), each in a tangential L-direction a slot-like opening (6) with remaining webs (7) is present or the slot-like opening (6) with web (7) in the radial direction of the The fillet (5) runs out.