DD293300A5 - GRINDING CORNER SEQUENCE, PREFERABLY FOR SUPERHERAL CUTTING MATERIALS - Google Patents

Abstract

The invention relates to the design of Schleifkoerpersegmenten, preferably for superhard cutting materials. The purpose and task is to make the geometric shape of the Schleifkoerpersegmente so that, coupled with a saving of super hard cutting material, by analogous application of the guidelines of geometrically determined cutting edge stabilization and improved effect of the cooling, lubricating and Spülmittels the increase in life the entire Schleifkoerpers result. This is achieved by the pyramidal or frustoconical arrangement of the back, side and Nebenschneidenflaeche under defined angles of inclination, wherein the inclination angle of Nebenschneidenflaeche has negative values, thus resulting in an undercut, free-cutting surface. The main cutting surface carrying the cutting material layer can be adapted to the intended use of the abrasive body segment on a base body. The base area is designed for a suitable fastening and for a favorable flow of the coolant, lubricant and rinsing agent {cutting material; cutting; Saving; Cutting stabilization; Life; Durchflusz}

Description

For this 2 pages drawings

Field of application of the invention

The invention relates to the design of the geometric shape of individual, often combinable abrasive segments with attention to separation knowledge, especially using superhard cutting materials, the segments are fixed in a known manner on the surface of a process specific base body that a multiple openwork surface of a cutting body arises, whereby the effect of the cooling, lubricating and scavenger is significantly enhanced.

Characteristic of the known state of the art Segmented abrasive articles have hitherto only become known as random or regular arrangements of segments,

whose geometric shape corresponded to the surface profile to be produced (negative nominal shape).

The reason for the segmentation was an elastic deformability of the main body. Through the slots, grooves o.a. were

larger segments separated into smaller pieces.

The targeted use of segments, analogous to separation technical principles of the geometrically determined cutting edge

were designed, was missing.

There are known segments of regular geometric shape, analogous to the known so-called Igelschaftfräser on

a base body are arranged. Above it, segments with a negative profile of the finished workpiece surface are arranged on a ribbon so that there is a certain gap between them, as described in DE-OS 331514. The disadvantage here is the lack of attention to the findings of the geometrically determined cutting edge.

Similarly, vertical grooves were introduced in DE-OS 3219 567 in a surface carrying abrasive grain, which

disadvantageous.

All known solutions have the disadvantage that in their design analogies to the guidelines of geometric

certain cutting edge and thus substantial service life reserves were ignored at relatively high cutting material use.

Object of the invention

It is an object of the invention to design the geometric shape of abrasive segments so that analogous guidelines of the geometrically determined cutting edge are advantageously used. Special attention is given to the use of SHS and its most economical use with good accessibility for the cooling, lubricating and rinsing agent.

Explanation of the essence of the invention

The invention has for its object to make abrasive body segments geometrically so that the known guidelines of the geometrically determined cutting advantageous effect on the life of the grinding wheel in total, in addition to the edge stabilization and the improved effect of the cooling, lubricating and rinsing a Saving on cutting materials, preferably superhard cutting materials is achieved.

According to the invention, this is achieved in that abrasive body segments, the three cutting surfaces limiting the lateral surfaces pyramidally sloping at a defined angle and thus represent a static support and the minor cutting surface with the aim of reducing friction at a defined angle of inclination is an undercut, free-cutting surface.

In a known manner, the cutting material is concentrated on the main cutting surface. The non-cutting segment foot is used for attachment to the base body and can be designed as a pyramid-like continuation of the segment head for a positive connection (eg for combined wedge-shaped and dovetailed insertion) or as a cuboid ^ termination of the segment, provided with form elements for non-positive connection types.

Depending on the objective function, the former shape of the segment foot permits a substantially denser packing on the base body. These segments can be combined in a variety of ways and are suitable in size and arrangement in conjunction with suitable methods for attachment to a body with general or procedural surface profile for all peripheral grinding and grinding, with one-sided, mutual or circumferential loads may occur.

Ausführungsbelsplel The invention will be explained below with reference to an exemplary embodiment. Fig. 1: shows the embodiment of an abrasive segment with cuboid foot in three views.

The abrasive body segment has a Segmentfuß 1, which can accommodate known, not shown here connection and form elements for its attachment due to its regular shape. On the Segmentfuß 1 sits the segment head 2, which serves as a top surface, the cutting material layer 3 supporting the main cutting surface 4, an inclined at the angle A ₁ back surface 5, two inclined at the angle X ₂ side surfaces 6 and the negative angle at the side X ₃ minor side surface. 7 has.

The non-cutting base 8 of the Segmentfußes 1 is preferably completely or at least partially flat designed to form a defined contact surface when mounting on the body. The main cutting surface 4, however, depending on the grinding process and the nature of the body in a known manner manufacturing technology already be provided with a radius, with tips or other form elements.

Fig. 2: shows the embodiment of an abrasive body segment such that Segmentfuß and segment head seamlessly merge into each other and so a Segmentpyramidenstumpf 9 with the already mentioned in Fig. 1 surface designations, under the same inclination angles λ ,, A ₂ and A ₃ and with the same design guidelines for main cutting surface 4 and base 8, forms.

FIG. 3: shows the embodiment of an abrasive body head (analogous to FIG. 1) or an entire abrasive body segment (analogous to FIG. 2) in the form of a truncated cone, in which the surfaces 5, 6 and 7 already mentioned in FIG. 1 are seamless merge. This shape is suitable with a positive value for inclination angle X _3, especially for grinding processes with circulating load around the segments.

Claims (5)

1. abrasive body segment, preferably for super hard cutting materials, with a subsequent surface to a preferably schneidstofffreien layer forming the Segmentfuß, and an adjoining layer with introduced grain of a cutting material, which is bounded by a base surface opposite the main cutting surface, characterized in that the Main cutting surface (4) of a rear surface (5) and two side surfaces (6) which are opposite to the Lot on the base (8) drop at a positive angle of inclination, and is bounded by a minor cutting surface (7) opposite to the Lot on the Base (8) drops at a negative angle of inclination. 2. abrasive segment according to claim 1, characterized in that this is in the form of a Truncated cone, wherein the rear surface (5), the two side surfaces (6) and the N'jbenschneidenfläche (7) represent parts of the lateral surface of the truncated cone and merge seamlessly into each other. 3. abrasive segment according to claim 1, characterized in that the rear surface (5), the side surfaces (6), the minor cutting surface (7) and the base (8) all or also single single or more openings or notches for the flow or the targeted line carry a rinsing, lubricating and coolant. 4. abrasive segment according to claim 1, characterized in that the cutting material layer (3) carrying the main cutting surface (4) already carries negative mold elements of the workpiece surface to be manufactured. 5. abrasive segment according to claim 1, characterized in that the geometric configuration is arranged a mirror image of the base surface (8) a second time.