WO2010083541A1

WO2010083541A1 - Side milling cutter tool and cutting element

Info

Publication number: WO2010083541A1
Application number: PCT/AT2009/000022
Authority: WO
Inventors: Hans Knoll
Original assignee: Linsinger Maschinenbau Gmbh
Priority date: 2009-01-22
Filing date: 2009-01-22
Publication date: 2010-07-29
Also published as: CN102292182A; EP2401106A1; KR20110135857A; RU2011134444A

Abstract

The invention relates to a side milling cutter tool for milling and/or sawing metal blanks, comprising a disk-shaped main body (2), at or on the edge region of which a plurality of exchangeable cutting elements (3), such as in particular hard metal blades, are arranged, wherein seats (10) are designed at the edge region of the main body (2) for at least sectionally receiving or for at least having contact with the cutting elements (3), and the cutting elements (3) are non-positively or positively in mutual contact with the seats (10), or rest against or on the seats (10) or are received by the same, such at least those cutting forces acting tranversely to the cutting plane on the cutting elements (3) are absorbed by the respective seats (10), wherein the seat (10) has a seat support surface (11) which is delimited by a boundary elevation (9) such that the boundary elevation (9), together with the seat (10), forms a receiving pocket that is open on one side for positively receiving the cutting element (3).

Description

Side milling cutter tool and cutting element

The invention relates to a side milling cutter tool for milling or sawing metal blanks, in particular metal pipes or metal billets, with a disk-shaped base body and with several arranged on the edge region of the disk-shaped base body, interchangeable cutting elements, and with fastening means for releasably securing these cutting elements at the edge region of the disc-shaped Grundkör - pers, and further relates to a cutting element for use in a Scheibenfräserwerkzeug.

Such a tool is known from DE 34 25 699 PS the same patent applicant. This tool for machining, in particular for milling methods with high feed rates, has a disk-shaped base body and a plurality of interchangeable cutting elements arranged on the edge region of the disk-shaped base body, such as carbide blades or reversible cutting plates, and fastening means for releasably securing these cutting elements on the edge region of the disc-shaped base body , In order not to reduce the effective number of blades with regard to the feed rate and to exclude the great risk of breakage of long carbide cutters, the previously known tool, especially for space milling, has been attached to the base body of the

Tool or on a cutting element holder at least two cutting elements formed in a specific shape, in particular turning cutting plates made of hard metal, which are arranged with / without gap side by side as a combination of blades on the main body or in this holder. The reversible cutting plates have a square or triangular base surface, wherein in the base body correspondingly designed seats are provided for receiving the cutting forces. The reversible cutting plates are clamped to the base body by means of a clamping wedge.

From the AT 004 597 Ul of the same patent applicant, a cutting tool is known in which the cutting inserts the body can be fixed by clamping. In this "self-clamping principle", the cutting inserts are clamped in a recess of the tool body by a part of the base body, which is designed as a resilient clamping arm.This is mainly used for long, narrow cutting inserts, as with tools for cutting or parting or The clamping force that clamps the cutting insert in the receptacle corresponds to the spring force of the clamping arm, either under clamping contact when inserting the cutting insert into the clamping insert

Recording is automatically spread open, or is spread apart before insertion of the cutting insert by a suitable tool beyond the clamping position, whereby the positioning of the cutting insert is facilitated in the recording. The maximum attachable clamping force is limited for structural or material-technical reasons, so that it can come to a retraction of the cutting insert from the recording especially in disc cutters in which high centrifugal forces occur in use. In addition, with such tools, adequate measures must be taken to prevent unintentional removal of the cutting inserts from the receptacle.

From GM 78 36 282 Ul a saw blade-like milling disc with distributed over the circumference of a body, arranged in receiving pockets cutting bodies, preferably indexable inserts or Wendenachschleifplatten known, in which the cutting body in cross-section U-shaped, wherein a cutting edge having a leg a rest provided on the circumference of the base rest, and engages the second leg of the U-shaped cutting body arranged by a plane of the body axially parallel Durchgriffsoffnung. By this known milling disc much narrower sheets should be used, and it should be avoided vibrating or fluttering of the saw blade. Based on the prior art according to DE 34 25 699 PS, the invention has for its object to provide a tool for machining of the generic type, in particular for milling method with high feed rates available, which compared to the previously known

Tools allows a much wider range of applications, and for example, the sawing of stainless steels, thereby enabling the use of arbitrary cutting geometries with maximum service life, with a change of a cutting plate, as in a premature outbreak of a cutting edge, as simple and fast as possible can, and in which on the other hand, the tendency generally occurring for disc cutters to harmful vibrations can be largely reduced or avoided.

This object is achieved by the blade milling tool specified in claim 1 and the cutting element specified in claim 12.

According to the invention, a side milling cutter tool for milling or sawing metal blanks, in particular metal pipes or metal billets, having the following features is provided:

the tool has a disk-shaped basic body, on or on the edge region of which several interchangeable cutting elements, in particular hard metal knives, are arranged,

- At the edge region of the disc-shaped base body seats are formed for at least partially recording or at least for conditioning the cutting elements, the cutting elements such form positively or positively with the seats in mutual contact or at least rest with or on the seats or are recorded that at least such acting on the cutting elements transverse to the slice plane cutting forces are absorbed by the respective seats, wherein the seat has a seat support surface, which is bounded by a boundary elevation such that the edge elevation with the seat one to one side forms an open receiving pocket for positive reception of the cutting element,

the cutting elements have a substantially prismatic or cuboid basic shape with at least one cutting edge whose width projects beyond the thickness of the disk-shaped base body,

- The cutting elements have at least one passage bore for receiving a fastening means, wherein the fastening means is formed by a fastening screw, which engages in a substantially arranged in the radial direction at the edge region of the disc-shaped base body threaded bore.

It is particularly advantageous in milling or sawing tools or cutter heads for Raumfräs- or sawing to z. B. to use the full trajectory of a Kegelfräskopfes or saw head as close as possible over the workpiece surface, the cutting element, for example, with the aid of a countersunk screw in the aforementioned seats, which have corresponding bearing or contact surfaces for receiving the cutting forces to attach.

The tool according to the invention has considerable advantages over the previously known embodiments. A detachable connection of the cutting elements by means of screws, in particular countersunk screws on the peripheral region of the body in a substantially radial direction in place of the previously known solder or clamp connections allows the use of any cutting geometries (without loops), and thus a significantly larger area of application, such as sawing of stainless steels. Higher service life is possible because, for example, if a cutting edge prematurely breaks out, only one cutting element needs to be changed. In addition, the hitherto recognizable tendency of disc cutters to harmful vibrations effectively reduced or attenuated by these special design measures on the tools according to the invention. The screw fastening according to the invention is basically more robust such. As the self-clamping of inserts used so far or the attachment by means transverse to the disk plane fastening screws.

According to the principle of the invention, it is furthermore advantageously provided that the fastening of the cutting elements at the edge region of the disc-shaped base body takes place by means of the fastening screws in the tangential direction with respect to the circumferential direction of the main body disk, i. the cutting edge or the cutting edge associated upper cutting surface is arranged substantially in the tangential direction at the edge region of the disk-shaped base body. This tangential cutting element arrangement results in the highest possible stability against vibrations, even at higher chip strengths of the workpieces to be machined.

In a preferred embodiment of the invention, in which a particularly good lateral stabilization of the cutting element in the recess or the cutting element seat is achieved, it is provided that at the edge region of the disc-shaped base body a substantially L-shaped recessed seat in the main body of the tool with a the one seat leg of the L-shaped seat forming seat support surface and formed with the other leg of the L-shaped seat forming seating surface for receiving the acting on a substantially prismatic or cuboidal basic shape having cutting elements cutting forces. In this case, the cutting element in a preferred structural embodiment may have a lower and / or an end abutment surface, which are in mutual contact with the seat support surface and / or with the seat bearing surface of the L-shaped seat, wherein the cutting element and the L-shaped seat Their mutual contact surfaces are executed positively. In a further preferred embodiment, the lower and / or the frontal contact surface of the

Cutting element seen in cross-section U-shaped. Another essential advantage of the invention is that different types of cutting elements are formed, which can be used or fastened on the same base body, and of which at least one cutting element type has a plurality, at least two successively usable cutting edges. Thus, at least one type of cutting element may have a pre-cutter. In another type of cutting element, a trimmer may be provided.

In a particularly preferred type of cutting element according to the invention, both a pre-cutter and a trimmer can be provided, whereby an important advantage in this variant, a dual use of the cutting element results from the fact that in a first use the Nachschneiderkante is used, and then after a Consumption of the same and after turning by 180 ° during subsequent second use the Vorschneiderkante is reused.

In addition, at least one type of cutting element can have one

Have chip divider, the z. B. is formed by a running in the circumferential direction of the body Spanteilernut. Preferably, the chip breaker groove formed in or on the cutting surface plane is offset off-center, in two different directions of displacement, with the cutting elements sequentially secured to the main body alternately having chipbreaker grooves arranged in one and in the other displacement direction, thereby reducing the still calmer die run Vibration can be achieved.

In a particularly preferred embodiment of the invention, the tool is designed as a side milling cutter, and in particular designed as a side milling cutter for sawing with different cutting forms of the cutting elements. Further advantages, expediencies and developments of the invention will become apparent from the other dependent claims.

Further details emerge from the following description of an embodiment with reference to the drawing. It shows:

1 is an exploded perspective view of a section of the tool according to an embodiment of the invention;

Fig. 2 is a perspective view of the cutout of Figure 1 in the assembled state. and

Fig. 3 is a front view of a section of the tool according to the embodiment of the invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT The preferred embodiment of the invention shown in detail in FIGS. 1 to 3 comprises a tool 1 for machining, in particular for milling and / or sawing methods with high feed rates, with a disc-shaped base body 2 and with several arranged on the edge region of the disk-shaped base body 2 The cutting elements 3 have a substantially prismatic or cuboid basic shape with at least one cutting edge 5, the largest width b the Thickness d of the disc-shaped base body 2 surmounted. In the illustrated embodiment, the cutting width b is about 10 mm, and the slice thickness is about 8 mm. The cutting elements 3 have at least one passage hole 6 for receiving the fastening means 4, wherein the fastening means is formed in all embodiments by a fastening screw, which in a substantially in the radial direction at the edge region of the disk-shaped base body 2 arranged threaded bore 8 engages. Here, the attachment of the cutting elements 3 takes place at the edge region of the disc-shaped base body 2 by means of the fastening screws 4 in a tangential direction with respect to the circumferential direction or direction of rotation t of the base body disk 2, ie the cutting edge 5 or the cutting edge associated upper cutting surface 7 is substantially in tangential direction at the edge region of the disk-shaped base body 2 is arranged.

As can be seen in particular from Fig. 1, at the edge region of the disk-shaped main body 2 is a substantially L-shaped recessed seat 10 in the base body 2 of the tool 1 with a one leg of the L-shaped seat 10 forming seat support surface 11 and one with the other leg the L-shaped seat 10 forming seat abutment surface 12 for receiving the cutting elements acting on the one substantially prismatic or cuboidal basic shape 3 cutting forces acting formed. In the edge region of the disc-shaped basic body 2, chip spaces in the direction of rotation t are respectively formed after the cutting elements 3 in the form of round recesses which adjoin the L-shaped seats 10. As can further be seen in particular in FIG. 1, the cutting element 3 has a lower abutment surface 15 and an end abutment surface 16, which are in mutual contact with the seat abutment surface 11 and with the seat abutment surface 12 of the L-shaped seat 10, respectively 3 and the L-shaped seat 10 are designed positively on their gegensei- term contact surfaces 11 and 15, for example, according to the illustrated in the figures, particularly preferred embodiment, in which the lower contact surface 15 of the cutting element 4 is seen in cross-section U-shaped , As a result, a particularly good lateral stabilization of the cutting element 3 in the recess or the seat 10 is achieved. Alternatively or additionally, the front-side contact surface 12 can also be cut in cross-section. be U-shaped design (not shown). The seat support surface 11 is delimited by an L-shaped edge elevation 9, and thus forms a receiving pocket open to one side for the positive reception of the cutting element 3. The edge elevation 9 ensures secure lateral support of the cutting element 3 received in the seat 10.

For all embodiments shown in the figures, the cutting width b is approx. 4 mm, with a tool diameter of approx. 500 to 800 mm, the cutting width b approx. 6 mm, with a tool diameter of approx. 800 to 1000 mm, the cutting width b approx. 8 mm, and with a tool diameter of about 1000 to about 2200 mm, the cutting width b is about 10 to 16 mm.

In the illustrated in FIGS. 1 to 3 preferred embodiment of the invention, different types of cutting elements can be provided, all of which can be used or fastened on the same disk-shaped base body 2. The cutting element type shown in the figures has two simultaneously or successively usable cutting edges 13 and 14, and indeed as the cutting edge 13 as a pre-cutter with a slightly emerging from the upper cutting element level 7 Vorschneiderflächenabschnitt to which a surface portion with a larger inclination angle connects and extends to the passage opening 6, and the cutting edge 14 may be formed as a trimmer with the thickness d of the main body 2 superior Nachschneiderbreite b. The advantage of this embodiment of the cutting element 3 is in a dual use of this cutting element in that at a first use with aligned in the direction of rotation t trim edge 14 this is worn faster because of the protruding width and then after turning by 180 ° in the subsequent second use the Pre-cutting edge 13 can be used can. To use this advantage, it is expedient if the cutting elements are mounted in an alternating arrangement on the circumference of the base body 2, that is, a cutting element 3 with oriented in the direction of rotation t cutting 13 follows with such a counter-rotating direction oriented cutting edge 14.

Furthermore, in the case of a cutting element type (not illustrated in more detail in the figures), a chip divider can be provided, which is formed by a chip breaker groove extending in the circumferential direction t of the main body 2. Preferably, the formed in or on the cutting surface plane 7 chip breaker is arranged eccentrically offset, in two different displacement directions, particularly ^'the cutting elements successively fixed to the main body 2 alternately have a in the one and in the other Verset- wetting device disposed chip breaker, whereby a still quieter tool run with reduced vibration can be achieved.

Claims

claims

1. Disk milling cutter tool for milling or sawing metal blanks, in particular metal pipes or metal billets, having the following features:

the tool has a disc-shaped base body (2), on or on the edge region of which a plurality of interchangeable cutting elements (3), in particular carbide knives, are arranged,

- At the edge region of the disc-shaped base body (2) for seats at least partially or at least to the cutting elements (3) seats (10) are formed, wherein the cutting elements (3) kraftschlüs- ss or form-fitting with the seats (10) in standing against each other or at least with or on the seats (10) abut or are received, that at least such acting transversely to the disc plane on the cutting elements (3) cutting forces of the respective seats (10) are received, wherein the seat (10 ) has a seat support surface (11) which is bounded by an edge relief (9) such that the edge elevation (9) forms with the seat (10) a receiving pocket open to one side for the positive reception of the cutting element (3), - the cutting elements (3) have a substantially prismatic or cuboidal basic shape with at least one cutting edge whose width (b) the thickness (d) of the disc-shaped G Round body (2) towers over,

- The cutting elements (3) have at least one passage bore (6) for receiving a fastening means, wherein the fastening means is formed by a fastening screw (5), which in a in. essentially in the radial direction (9) at the edge region of the disc-shaped base body (2) arranged threaded bore (8) engages.

2. Tool according to claim 1, characterized in that the attachment of the cutting elements (3) takes place at the edge region of the disc-shaped base body (2) by means of the fastening screws (5) in the tangential direction (t) with respect to the circumferential direction of the main body disc (2), ie the cutting edge (7) or the cutting edge associated with the upper cutting surface (21) is arranged substantially in the tangential direction at the edge region of the disk-shaped base body (2).

3. Tool according to claim 1 or 2, characterized in that at the edge region of the disk-shaped base body (2) has a substantially L-shaped recessed seat (10) in the main body of the tool with the one leg of the L-shaped seat forming seat support surface (11) and formed with a the other leg of the L-shaped seat forming seat bearing surface (12) for receiving the acting on the one substantially prismatic or cuboidal basic shape having cutting elements (3) cutting forces.

4. Tool according to claim 3, characterized in that the cutting element (3) has a lower and / or an end-side contact surface (15, 16) with the seat support surface (11) and / or with the seat bearing surface (12) of the L- shaped seat (10) are in mutual contact, wherein the cutting element (3) and the L-shaped seat (10) are designed positively on their mutual contact surfaces.

5. Tool according to claim 3 or 4, characterized in that the lower and / or the end-side abutment surface of the cutting element (3) is designed in cross-section U-shaped.

β. Tool according to one of the preceding claims, characterized in that different types of cutting elements are formed, which can be used or fastened on the same basic body (2), and of which at least one Cutting element type (3) has a plurality, at least two successively usable cutting edges (13, 14).

7. Tool according to claim 6, characterized in that the cutting element (3) has two simultaneously or successively usable cutting edges (13, 14), namely a first cutting edge (13) and a second cutting edge (14), which on opposite sides of Cutting surface are arranged, wherein the first cutting edge (13) as a pre-cutter, and the second cutting edge (14) is formed as a trimmer.

8. Tool according to claim 7, characterized in that the first cutting edge (13) is formed as a preliminary cutter with a slightly emerging from the upper cutting element plane (7) Vorschneiderflächenabschnitt, which adjoins a surface portion with a larger inclination angle and up to the passage opening ( 6), and the second cutting edge (14) as a trimmer with the thickness (d) of the base body (2) superior Nachschneiderbreite (b) is formed.

9. Tool according to claim 6, I ₁ or 8, characterized in that at least one cutting element type (3) has a Spantei- ler, which is formed by a running in the circumferential direction of the body Spanteilernut.

10. Tool according to one of the preceding claims, characterized in that it is designed as a disc cutter for sawing with different cutting element shapes of the cutting elements (3).

11. Tool according to one of the preceding claims, characterized in that at a tool diameter of about 300 to 500 mm, the cutting width about 4 mm, with a tool diameter of about 500 to 800 mm, the cutting width 6 mm, with a tool diameter of about 800 to 1000 mm, the cutting width is about 8 mm, and with a tool diameter of about 1000 to about 2200 mm, the cutting width is about 10 to 16 mm.

12. Cutting element for use in a cutting tool (1) according to one of claims 1 to 11.