DE6906755U - CUTTING TOOL - Google Patents

Description

Son's oath tool

The innovation relates to cutting tools working by means of friction and in particular diamond-studded tools of the Embodiment in which the from a thin and flexible sheet metal disk existing tool body is occupied on its circumference with diamond particles, which one the Form the cutting edge completely covering the edge of the tool.

The innovation relates in particular to diamond cutting tools known embodiment, in which the cutting edge working with friction on the inner diameter a disc provided with a central bore is arranged. The one formed by the annular rim The cutting edge represents the working edge of the tool. The outer circumference of the tool can be clamped in a head part, to make the disc rotate while

6900755

Patent attorneys Dipl.-Ing. Martin Licht, Dipl.-Wirttch.-lng. Axel Hansmann, Dipl.-Phys. Sebastian Herrmann

MÖNCHEN 2, THERESIENSTRASSE 33 · Telephone 281202 · Telegremm-Adressei llpetll / Munich Bayer. Vereinsbank MOnchen, branch Oikar-von-Mlller-Ring, account no. 882495 · Postahedc-Konh »Munich Nf. 1 (3397

Oppenauer BOroi PATENT ADVOCATE DR. REINHOLD SCHMIDT

it is moved radially outward with respect to the workpiece introduced into the central bore. Discs these types are used to make fine cuts for various materials.

With the present innovation, an improved cutting tool is to be created, which is faster than so far common and at the same time less susceptible to tension or displacement, if a tension force occurring on the circumference on the Inside the cutting disc is effective «In particular, the innovation relates to the new arrangement the abrasion coating on the circumference of a cutting disk. The covering has the usual thickness of the abrasion material on the working edge, while relatively narrow flanges of the abrasive material overlap the sides of the disc and are glued to this. Radially extending segments held at an angle to one another form notches which extend radially towards the narrow flanges to better introduce coolant can, in order to be able to better lead out abraded material of the workpiece, to make the distribution of the tension forces more uniform and to reduce frictional resistance and to reduce heat generation during the cutting process.

The innovation is explained on the basis of the attached drawings.

Fig. 1 is a plan view of a diamond-studded cutting disc or a son's oath sheet naoh of the present innovation.

FIG. 2 is an enlarged partial view of the area of FIG. 1 within the arch 2.

190675

Pig. 3 is an enlarged fragmentary sectional view taken along line 3-3 in FIG. 2.

As shown in the drawings, the innovation is implemented in a cutting tool IO which is effective under grinding action and which has a disk-shaped body 11 made of thin and flexible sheet metal. The disc is delimited by inner and outer circumferential edges 12 and 13. The inner edge is covered with a lining made of friction material, which consists of diamond dust and a suitable binding agent. With the aid of this cutting edge, a workpiece (not shown) can be cut through when the tool body is set in rotation. If, as in the present case, the inner edge 12 is used as a working edge, the outer area, which is preferably equipped with spaced holes Ik , is gripped and clamped by a head construction (not shown) of a conventional type. The head and the tool are rotated while the workpiece is pivoted radially outwards from inside the hole in the center, so that the friction material cuts through the workpiece with a thin notch.

Tools of the type mentioned can be used for cutting any material and are in particular suitable for very hard materials on which very fine cuts can be made. A special form of application consists of cutting through rods of semiconductor material in the form of thin slices or plates. for Mass production becomes an increased speed more and more important; Tools of the type mentioned are therefore in some cases over their intended speed offset in rotation to achieve a higher cutting performance. Overheating often occurs

ti · «·· · t

III · < I.

I Il III "I"

m, / j mm

of the workpiece and the tool. Premature breaking of the friction material or deformation of the tool body are the consequence. The accumulation of Sonittteilchen the workpiece affects at the same time Effectiveness of the friction material and interferes with the rapid cutting process.

According to the present innovation, the sonic technique carried out by means of friction material will be performed in a new way carried out in order to increase the effective working speed of the tool 10 without excessive heating, an accumulation of cut particles or other disadvantages of a previously known type have to be accepted. For this Basically, the covering is designed as a collar, which consists of a covering 15 of abrasive material of normal thickness on the Working edge 12 of the body il and consists of narrow flanges 17 which overlap the sides of the body. Out the abrasive material existing segments 18 are arranged at a distance from one another on the Buna and extend radially from this along the tool body. They form notches 19 which extend radially into the covering. In other In words, the usually narrow bands of abrasive material that line the sides of the tool body overlap, are jagged or subdivided along the edges of the bands in the direction facing away from the working edge 12, so that uncoated areas of the tool body extend very close to the edge of the collar and are divided by interrupted, radial extensions of the lining.

The extensions or segments 18 each have a curved outer edge which forms the radial side edges connects with each other. The notches 19 are provided with almost straight inner ends which pass through the outer edges the flanges 17 are formed. So they work

ι iitt t t t

I Il t · ■ t · t

III 1 I · «· II t

1 ι t I (ι ι

«1) 1 Il Il

separated segments and the notches with each other and form a jagged edge pattern, which is in each case located on both sides of the tool body.

The body 11 of the tool IO can be designed in various sizes and compositions. Stainless steel and phosphor bronze are usually used. The diameter of the body and the size of the hole in the middle are selected for the respective purpose. For example, a tool with an outside diameter of 254 mm is used with an inside diameter of 101.6 mm · The thickness dimension is 0.05 mm and more. Usually the peck size is 0 _} 101 mm.

With reference to the particular embodiment of the In the curved, jagged pattern, it can be seen that the angular width or opening of the notches 17 is smaller than occupy the width of the segments 18 and the length of the latter a multiple of the width of the flange © = The flanges and segments are of uniform axial thickness and are flat with each other, but more often flattened outwards. Flanges and segments of typical C embodiment are in the thickness range from 0.05 to 0.101 mm. The radial overlap of the flanges in a tool of the type shown is very narrow, for example between 0.076 mm to 0.177 mm. The length of the segments is much greater, for example 1.27 mm or more. Of course, curved, serrated patterns of other dimensions and shapes can be used, to get similar results.

With a tool 10 of the type mentioned, considerably higher cutting speeds are possible; this out of two Establish. First of all, coolant can be removed more easily.

·· ι · e ι r »fi« ■ »

II * · · · rri «t

ι I ··· · · at ι rri

iiii ·· tt iff · r * ft

long of the body 10 penetrate the notched pattern and come into contact with the cutting * edge 15 arrive. In this way a more even distribution of the heat is achieved and prevents it from settling the temperature at the cutting edge has increased too much. It should be noted that the side surface area of the Lining is weakened and that this should reduce the amount of friction. Also the second essential one The factor for achieving an improved cutting speed is the result of the interruption of the ♦ Part of the surface near the son's envy with those in between Notch areas. The arrangement mentioned allows cutting particles and dust to be removed more easily so that an impairment of the work area due to sonic particles arising from the workpiece is avoided.

Another essential feature is the improved possibility of tensioning the body 11 with the aid of the openwork side parts of the covering. It is obvious that the diamond-coated parts are less are elastic than the unoccupied areas, so that tension forces occurring on the circumference are more uniform the cutting edge 15 are distributed if uncoated areas (the notches 19) closer to the edge or to the Edge lying. More uniform distribution of tension forces means improved usability and tool life. The notches also reduce the risk of the covering splintering if there is a stress load or is deducted.

Claims (1)

(xebrauohsmuateranmeldung t son oath tool Eye protection requirements t 1 · Vision cutting tool with a tool body made of thin and flexible lead material, on its circular edge an abrasive material is glued on in the form of a covering of certain radial dioke, characterized in that see the! flanges (17) the lining (15) radially along the Streoken edge and onto the Seiton of the tool body (11) are glued on that arranged on the circumference, separated segments (18) made of abrasive material close to one another are provided along at least one side at certain intervals along the edge and look from the flanges extend radially in the direction of the body and on this on · « are glued that the segments (18) represent an interrupted radial extension of the flanges and Areas of the tool body (11) are left uncoated in order to introduce coolant and cut particles during a To be able to discharge the oath of son. Hi · »··» Ow. * mmmrt * m 9 *** MeMNdWfI inta · »« ******* • eooftv »W der OWteh *» ft * ·· 690675i> Patent attorneys Dipl.-Ing. Martin Licht, Dipl.-Wirttch.-Ing. Axel Hansmann, Dipl.-Phys. Sebastian Herrmann III ti t ti • I · II I tilt I 1 1 I I I t It 1 Oil Il Il III · Il ti 2. Cutting tool according to claim 1, characterized in that that the friction edge runs continuously, and that the puddle of the surface is radially at a certain distance extend over the edge. 3. Cutting tool according to claim 1, characterized in that the tool body (11) is a thin and flexible sheet metal disc, the outer edge of which can be braced around the To rotate the disc so that a centrally located hole is formed through the inner peripheral edge, and that the Λ A friction edge made of the friction material on the disc is glued along the inner edge, the segments (18) being angularly separated from one another. k. Cutting tool according to claim 1, characterized in that the segments form inwardly extending notches (19) in the abrasive material on the disc. Cutting tool according to claim 4, characterized in that that the angular width of the notches is less than the angular width of the segments. 6. Cutting tool according to claim 4, characterized in that that each of the segments has radial sides connected to one another by a curved end, and that the notches have arcuate ends formed by the flanges, whereby the covering has an arcuate interrupted configuration on each side of the disc. 7. Cutting tool according to claim 4, characterized in that that the radial length of the segments is several times greater than the radial width of the pool. 8. Cutting tool according to claim k, characterized in that the tool body has a thickness in the range from 0.05 to 0.203, that the plansche have a thickness in the range of 0.05 to 0.1 mm and the body around 0.076 to 0.178 overlap mm and that the segments extend at least 1.27 mm above the flanges.