DE10144734B4 - Disc milling cutters and disc milling inserts for such a disc milling cutter - Google Patents

Abstract

Disc milling cutter with one at least two disc milling inserts (9, 10) replaceable receiving holders (40), wherein the Scheibenfräsereinsätze (9, 10) on the holder (40) on its circumference on a circular path evenly, at partial overlap the cutting edges (31) of the same in the circumferential direction, are arranged and the holder has a substantially circular cross-section with a through this extending axis of rotation (R), which has a circular cross-section a substantially circular disk left (41) and right (42) Side defined, wherein the Scheibenfräsereinsätze (9, 10) alternately the left (41) and right (42) side are arranged, wherein the Disc milling inserts (9, 10) with at least one substantially in the rotation axis direction (R) extending cutting edge (31) formed between a cutting chip surface (311) and a free-flank surface (312) of the disc milling insert (9, 10) is defined, with substantially radially to the right (42) or left (41) side aligned mounting position on the holder (40), the disk milling inserts (9, 10) are divided into a first and a second group, wherein the first...

Description

The The invention relates to a disc milling cutter having at least two Disc milling inserts interchangeable receiving holder, wherein the Scheibenfräsereinsätze on the holder at its periphery evenly on a circular path, at partial overlap the cutting edges thereof in the circumferential direction, are arranged and the holder has a substantially circular cross-section with a through has this extending axis of rotation, which has a circular cross-section a substantially circular disk-shaped right and left side defined, wherein the Scheibenfräsereinsätze alternately are arranged on the right and left side, with the Scheibenfräsereinsätze with at least one substantially extending in the direction of rotation axis Cutting edge, between a cutting chip surface and a free flank surface of Routers disc insert is defined with substantially radially to the left or right Side aligned mounting position on the holder, the Scheibenfräsereinsätze in a first and are divided into a second group, the first Group only for mounting on the right side and the second intended only for attachment on the left side. Farther The invention relates to disc milling inserts for such a disc milling cutter.

Known are disc cutters with attached cutting inserts. These cutting inserts are to prevent jamming against the cutter holder and its milling plane tilted on the cutter holder arranged. These cutting inserts are but essentially plate-shaped or cuboid configured, so that a through the cuboidal design of the Scheibenfräsereinsätze slightly roof-shaped Nutgrund formed by the also tilted cutting edges. In particularly low-tolerance specifications for a groove is so roof-shaped trained Groove bottom often disturbing and requires time-consuming and costly post-processing.

From the DE 26 15 329 A1 is a slot cutter for milling keyways etc. have become known in which inserts are held by means of a locking wedge on a support disc. To prevent clamping of the insert on the workpiece, the insert has a recessed area, which provides an exemption in the circumferential direction of 4 ° and radial direction of 5 ° relative to the workpiece. Therefore, the inserts are formed as left and right inserts, for placement on the right or left side of the cutter plane. However, the holder and the insert itself is kept very complicated, in particular, the assembly and attachment of the insert to the support plate is expensive to manufacture and assembly.

From the DE 197 39 355 A1 is a disc milling cutter with suitable insert for the production of a crank pin with Ölbund cheeks and undercuts known, the installation position of the inserts is provided substantially axially on the cutter. The rhombohedral designed to avoid clamping on the workpiece two-way inserts are held in individually by means of several adjustment screws to be set cassettes.

task The invention is a disc milling and Scheibenfräsereinsätze this to disposal to provide that avoid the disadvantages mentioned above, thus saving operations.

The Task is by a side milling cutter according to claim 1 and Scheibenfräsereinsätze after Claim 9 solved.

According to the invention, it is provided that the disc milling inserts through essentially plate-shaped formed indexable inserts are formed, the four mounting positions possess, in each case a cutting edge to wear used (so-called four-point cutting inserts), where the right and left side milling inserts each to the circular cross section are arranged and formed mirror-symmetrically, wherein the left Routers disc use to the through the circular Cross-section spanned plane in all three spatial directions with his contact surface is tilted, so no clamping of the disc milling insert located on the holder with those in the workpiece by means of the disc milling cutter brought in groove walls with the side surfaces of the disc milling insert occurs, with the free-flank surface parallel to the axis of rotation is and includes a defined clearance angle to the tangent plane, wherein the tangential plane lies tangentially on the circumference of the disk milling cutter, is orthogonal to the radial and parallel to the axis of rotation, where the radial is orthogonal to the axis of rotation.

advantageously, is the radial angle α selected to 12 °.

Also Advantageously, the plane angle β is selected to be 1 °.

A no less advantageous embodiment of the invention provides that the axial angle δ to 3 ° selected.

Preferably, the clearance angle γ is 7 ° selected.

The Have Scheibenfräsereinsätze Advantageously, a centrally disposed bore, by means of which they are fastened to the holder with a clamping screw.

Around to allow a better chip flow is the chip discharge surface formed in the form of a groove.

To In another aspect of the invention, disc milling inserts are proposed for use on a side milling cutter according to one of claims 1 to 8 are provided, wherein the Scheibenfräsereinsätze in a first and in a second group are divided, the first group only for each Attachment on the right side of the side milling cutter and the second only for Attachment is determined on the left side of the side milling cutter, wherein the Disk milling inserts through a substantially plate-shaped trained indexable insert are formed, each four Mounting positions on the side milling cutter enable, where each one cutting edge to wear used arrives.

Further Advantages, special features and expedient developments of the invention emerge from the other dependent claims or their sub-combinations.

following the invention will be further explained with reference to the drawing. in the Individual shows the schematic representation in:

1 a set according to the invention of a right and a left side milling cutter insert,

2a a view of a disk milling cutter equipped with disk milling inserts,

2 B a side view of a one equipped with Scheibenfräsereinsätzen disk milling cutter,

3a a cross section through a groove produced by means of a conventional milling cutter,

3b a cross section through a groove produced by means of a milling cutter with Scheibenfräsereinsätzen invention,

4 a side view of a Scheibenfräsereinsatzes invention,

5 another side view of the disc milling insert 4 .

6 and 7 a schematic representation of the spatial position of a Scheibenfräsereinsatzes with respect to the holder,

8th a cross section in the cutting direction AB off 7 through the disc cutter holder and the disc milling insert,

9 a partial view of the disc milling cutter 7 in the direction CD, and

10 a detailed view 6 ,

The in the figures, the same reference numerals designate the same or the same acting elements.

1 shows an inventive, mutually different Scheibenfräsereinsatzpaar, with a left-hand Scheibenfräsereinsatz 9 and a right side milling cutter insert 10 shown in oblique supervision. It is a turning plate has four mounting positions, each with a cutting edge 31 . 32 . 33 . 34 used until wear. The inserts are with their contact surfaces 11 attached to a disc cutter holder (see next figure) without movement. There are also 2-fold (also cuboid) inserts possible.

2a and 2 B show left and right side milling cutter inserts 9 and 10 on a disc cutter holder 40 assembled. The disc milling inserts are thereby by means of a centrally arranged clamping screw 45 attached to the holder ( 2 B shows the disc cutter holder 40 out 2a in the direction X). The direction of rotation of the disc milling cutter about the rotation axis R is indicated by the arrow U. The two groups of disc milling inserts are each only from one side with their contact surface 11 to the disc cutter holder 40 assembled. All disc milling inserts of a group (right 10 or left 9 ) have in their mounting position on the same (mirror-symmetrical) slight tilting, which is further illustrated and explained in the following figures. The cutting edges of the disc milling inserts are arranged in the circumferential direction one behind the other, wherein the cutting edges 31 Overlay in the circumferential direction a little, so that a clean groove bottom is milled out by completely removing material. The side milling cutter rotates in this case about the rotation axis R in the direction of rotation U.

3a shows a cross section through a means of a conventional with Scheibenfräsereinsätzen 7 fitted milling cutter milled groove 5 into a workpiece 6 (shown are only the superimposed Scheibenfräsereinsätze without holder as they are driven one after the other through the groove). The conventional disc milling inserts 7 are in turn mounted with slight tilting on the disc cutter holder. The tilting of the Scheibenfräsereinsätze each by the angle β is necessary in this case to cause no clamping of the Scheibenfräsereinsätze on the groove walls. As a result, the slightly roof-shaped groove base is formed by the cuboidal design of the disc milling inserts 5a through the also tilted cutting edges. For particularly low-tolerance specifications for a groove so roof-shaped trained groove base is often disturbing and requires a time and cost consuming post. 3b shows a cross section through a workpiece 6 with inserted therein groove 5 by means of inventive left and right side milling cutter inserts 9 and 10 (shown are again only the superimposed Scheibenfräsereinsätze without holder as they are driven one after the other through the groove). The inventive design of the disc milling inserts in right and left versions and each shaped cutting edge and free-flank surface now creates the plane groove bottom 5b which no longer requires post-processing.

The exact edges and surface curves of the disc milling inserts will be explained in more detail with reference to the following figures. Here are the left and right Scheibenfräsereinsätze according to 1 mirror-symmetrical (with the contact surface as a mirror plane), so that the explanations are only made for a right-hand side milling cutter insert.

4 shows a side view of the contact surface 11 a right-hand disc milling insert according to the invention 10 again as a four-turn insert with a substantially square base and four end faces 21 . 22 . 23 . 24 , a contact surface 11 and an outer surface formed parallel thereto 12 (hidden) is formed. In this case, the disc milling insert is mounted in use so that each of the four possible one cutting edge per mounting position 31 to 34 is used alone. Since the cutting edges are constructed completely identical only the cutting edge 31 explained in more detail. The cutting edge 31 is due to the limiting chip drainage surface 211 and clearance angle area 312 Are defined. The chip removal surface 211 is in the form of a groove in the cuboid cutting insert 10 at the front 21 adjacent to the cutting edge 31 brought in. The other limitation of the groove here is a limitation 212 dar. The cutting edge 31 This is done by one each at an angle to the front page 22 , to the front 21 and to the contact surface 11 beveled free-flank surface 312 educated. 5 shows a side view of the cutting insert 10 out 4 in the direction Y.

6 shows a schematic representation of the spatial position of the left side milling cutter insert 10 with respect to the disc cutter holder 40 , This closes the front page 21 an angle α (radial angle) in the radial direction (radial R ₁ ) to the Scheibenfräserhalter a. Accordingly, the front side closes 22 enter the same angle with the tangents or the orthogonal radial R ₂ . This radial angle is equal to the amount and sign for right and left side milling cutters. In the example this angle is selected with 12 °. The detail K will be in 10 explained in more detail after the further tilting with respect to the side milling cutter 42 are explained in more detail.

7 again shows the presentation 6 ,

In 8th is a cut AB off 7 shown. The disc cutter holder 40 has a recess 43 with holder contact surface 44 for receiving the disc milling insert on the contact surface 11 the same on (on a representation of the clamping screw 45 receiving thread in the holder 40 in extension of the bore 13 was omitted for better visibility). Here, the contact surface - and thus the cutting insert - a tilt β (plane angle) from the disc plane 42 on. As a result, a clamping of the outside 12 or whose limiting edges on the workpiece or the groove walls avoided. In the example shown, this angle is determined to be 1 °.

9 shows a view in the direction CD 7 , In this view, finally, the third angle δ (axial angle) which includes the contact surface to the holder defined. In the example, this angle is set to 3 °.

10 shows the detail K 6 , The circular disc tangential plane T is in this case parallel to the radial R _2, not shown, and to the axis of rotation R and orthogonal to the radial R ₁ . The plane of the free-flank surface 313 includes with the tangential plane T the angle γ (clearance angle) and runs parallel to the rotation axis R. The angle γ (clearance angle) is selected in the example shown to 7 °.

Due to the triple tilting of the disc milling insert a clamping of the outer surface 12 (Plane angle β = 1 ° and axial angle δ = 3 °) as well as the cutting edge in use 31 outside lying on the circumference of the milling cutter end face 22 (Radial angle α = 12 °) avoided on the workpiece or the groove surfaces. With the choice of the clearance angle γ = 7 ° and the corresponding position of the free-flank surface for Scheibenfräserhalter thus a flat groove bottom is possible. Further, otherwise usual, finishing operations for the Versäuberung the groove bottom are no longer necessary.

5

groove

5a

roof-shaped groove base

5b

flat groove base

6

Workpiece, material

7

Routers disc use (Conventional)

9

Routers disc use (Left)

10

Routers disc use (right)

11

Contact surface of the S

12

outer surface

13

drilling

2i i = 1-4

front

2i1, i = 1-4

Chip removal surface (fillet)

2i2, i = 1-4

center Limiting the chip discharge surface

3i, i = 1-4

cutting edge

3i1, i = 1-4

clamping surface

3I2, i = 1-4

Relief flank surface

3i3, i = 1-4

outside Limiting the free-flank surface

3i4, i = 1-4

system-side Limiting the free-flank surface

3i5, i = 1-4

center Limiting the free-flank surface

40

holder

41

left page

42

right page

43

recess

44

Contact surface of the holder

45

clamping screw

R

axis of rotation of the owner

U

direction of rotation

α

radial angle

β

plane angle

δ

axial angle

γ

clearance angle

Claims (9)

Disc milling cutter with at least two disc milling inserts ( 9 . 10 ) exchangeable female holder ( 40 ), wherein the Scheibenfräsereinsätze ( 9 . 10 ) on the holder ( 40 ) on its circumference on a circular path evenly, with partial overlap of the cutting edges ( 31 ) of the same in the circumferential direction, are arranged and the holder has a substantially circular cross-section with a rotation axis (R) extending therethrough, which circular cross-section has a substantially circular disk-shaped left ( 41 ) and right ( 42 ) Side, wherein the disc milling inserts ( 9 . 10 ) alternately on the left ( 41 ) and right ( 42 ) Side, wherein the Scheibenfräsereinsätze ( 9 . 10 ) with at least one substantially in the direction of rotation axis (R) extending cutting edge ( 31 ) between a cutting chip surface ( 311 ) and a free-flank surface ( 312 ) of the disc milling insert ( 9 . 10 ) is defined with substantially radially to the right ( 42 ) or left ( 41 ) Side aligned mounting position on the holder ( 40 ), wherein the Scheibenfräsereinsätze ( 9 . 10 ) are divided into a first and a second group, wherein the first group in each case only for attachment to the left ( 41 ) Side and the second only for attachment to the right ( 42 ) Side, characterized in that the disc milling inserts ( 9 . 10 ) are formed by substantially plate-shaped indexable inserts, which have four mounting positions, in each case a cutting edge ( 31 . 32 . 33 . 34 ) to wear, with the right and left disc milling inserts ( 9 . 10 ) are each arranged and formed mirror-symmetrically to the circular cross-section, wherein the right-hand side milling cutter insert ( 10 ) to the plane defined by the circular cross-section plane ( 42 ) in all three spatial directions (R ₁ , R ₂ , R) with its contact surface ( 11 ) is tilted, so that no clamping of the holder located on the Scheibenfrä sereinsatzes with the introduced into the workpiece by means of the disc cutter groove walls with the side surfaces of the Scheibenfräsereinsatzes occurs, wherein the free-flank surface ( 312 ) parallel to the axis of rotation (R) and includes a defined clearance angle (γ) to the tangential plane (T), wherein the tangential plane (T) is tangent to the circumference of the disc cutter, orthogonal to the radial (R ₁ ) and parallel to the axis of rotation (R) , where the radial (R ₁ ) is orthogonal to the axis of rotation (R). Disc milling cutter according to claim 1, characterized in that a chip removal surface ( 211 ) is formed substantially in the form of a groove. Disc milling cutter according to claim 1 or 2, characterized in that the cutting chip surface ( 311 ) sliding, in particular without edge or kink, in the / a Spanablauffläche ( 211 ) passes over. Disc milling cutter according to one of claims 1 to 3, characterized in that the disc milling inserts ( 9 . 10 ) a centrally located bore ( 13 ) by means of which it can be used alone with a single clamping screw ( 45 ) on the holder ( 40 ) are attached by means of frictional connection. routers disc according to one of the claims 1 to 4, characterized in that a radial angle α is selected to 12 °. routers disc according to one of the claims 1 to 5, characterized in that a plane angle β is selected to be 1 °. routers disc according to one of the claims 1 to 6, characterized in that an axial angle δ is selected to be 3 °. Disc milling cutter according to one of claims 1 to 7, characterized in that the clearance angle γ is selected to 7 °. Disc milling inserts ( 9 . 10 ), characterized in that they are intended for use on a disc milling cutter according to one of claims 1 to 8, wherein the disc milling inserts ( 9 . 10 ) are divided into a first and a second group, wherein the first group in each case only for attachment to the left ( 41 ) Side of the disc milling cutter and the second only for attachment to the right ( 42 ) Side of the side milling cutter is determined, wherein the Scheibenfräsereinsätze ( 9 . 10 ) are formed by a substantially plate-shaped indexable insert, each allow four mounting positions on the side milling cutter, in each case a cutting edge ( 31 . 32 . 33 . 34 ) is used until worn.