AT8436U1 - DISC MILLING TOOL AND CUTTING ELEMENT - Google Patents

Abstract

The invention relates to a tool for machining, in particular for milling or sawing method with high feed speeds, with a disk-shaped base body (2) and with a plurality of interchangeable cutting elements (4A, 4B, 4C) arranged on the edge region (3) of the disc-shaped base body (2). , as hard metal knives, and with fastening means (5) for releasably securing these cutting elements at the edge region (3) of the disk-shaped base body (2). The cutting elements (4A, 4B, 4C) have a substantially prismatic basic shape with at least one cutting edge whose width (b) substantially corresponds to the thickness (d) of the disc-shaped base body (2) and / or at least partially projects beyond this thickness (d) , The cutting elements (4A, 4B, 4C) have at least one passage bore (6) for receiving the fastening means, wherein the fastening means is formed by a fastening screw (5), which in a substantially radial direction (9) at the edge region (3) Disk-shaped base body (2) arranged threaded bore (8) engages.

Description

2 AT 008 436 U1

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 disc-shaped base body, interchangeable cutting elements, and with fastening means for releasably securing these 5 cutting elements at the edge region of the disk-shaped Main body, 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, especially for milling processes with high pre-io shear rates, has a disc-shaped base body and a plurality of arranged on the edge region of the disc-shaped body, interchangeable cutting elements, such as carbide or Wendeschneideplatten, and fastening means for releasably securing these cutting elements at the edge region of the disc-shaped body. In order not to reduce the effective number of blades with respect to the feed rate and 15 exclude the great risk of fracture long carbide knife, created in particular for space milling prior art tool on the main body of the tool or on a cutting element holder at least two formed in a specific form cutting elements in particular turning cutting plates made of hard metal, which are arranged side by side with / without gap as a combination of blades on the main body or in this holder. The Wen-20 deschneideplatten have a square or triangular base, wherein 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 U1 of the same patent applicant is a cutting tool be-25 known, in which the cutting inserts are clamped to the body. In this "self-clamping principle" the cutting inserts are clamped in a recess of the tool body by a part of the body, which is designed as a resilient clamping arm clamped. This is mainly used for long, narrow cutting inserts, as they are used in tools for cutting or parting off or even with disc cutters. 30 The clamping force that clamps the cutting insert in the receptacle, corresponds to the spring force of the clamping arm, which is automatically spread under clamping contact when inserting the cutting insert into the receptacle, or is spread by a suitable tool beyond the clamping position before inserting the cutting insert whereby the positioning of the cutting insert in the receptacle is facilitated. The maximum 35 attachable clamping force is limited for design or material reasons, so that it can come to a retraction of the cutting insert from the recording especially in disc cutters, where high centrifugal forces occur in use. In addition, such tools must be taken to prevent inadvertent removal of the cutting inserts from the recording sufficient measures. 40

On the GM 78 36 282 U1 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 bodies are formed in cross-section U-shaped, with a cutting edge exhibiting leg 45 rests on the circumference of the body provided support, and engages the second leg of the U-shaped cutting body arranged by a plane of the base body axis-parallel passage opening. By this known milling disc much narrower sheets should be used, and it should be avoided vibrating or fluttering of the saw blade. 50

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, which compared to the known tools a much larger area of application 55th allows, 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 eruption of a cutting edge, as simple and fast as possible and in which, on the other hand, the inclination to damaging vibrations generally occurring in disk cutters can be largely reduced or avoided.

This object is solved by the disc milling tool specified in claim 1 and specified in claim 12 cutting element. According to the invention, a side-milling cutter tool for milling or sawing metal blanks, in particular metal pipes or metal billets, is provided with the following features: the tool has a disc-shaped base body, on or on the edge region of which several interchangeable cutting elements, in particular carbide cutters, are attached In each case seats are formed on the edge region of the disc-shaped main body for at least partially receiving or at least abutting the cutting elements, wherein the cutting elements are frictionally or positively in contact with the seats or at least abut or received with or on the seats are at least such that acting at right angles to the disc plane cutting forces on the cutting elements are absorbed by the respective seats, - adjoin the seats formed in the edge region of the disc-shaped base body chip spaces, - the S tipping 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 through-hole for receiving a fastening means, wherein the fastening means is formed by a fastening screw which engages in a substantially in the radial direction at the edge region of the disk-shaped body 30 arranged threaded bore.

Here, it is particularly advantageous in milling or sawing tools or cutter heads for Raumfräsoder Sägeverfahren to e.g. the full trajectory of a Kegelfräskopfes or saw head as close as possible to exploit the workpiece surface, the cutting element 35, for example, with the aid of a countersunk screw in the aforementioned seats, the corresponding support or contact surfaces for receiving the cutting forces to attach.

The tool according to the invention has over the previously known embodiments erhebli-40 che advantages. 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 much wider range of applications, e.g. Sawing of stainless steels. It is possible higher life, because about 45 in case of premature eruption of a cutting edge only one cutting element must 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, e.g. the previously used self-clamping of inserts so 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 attachment of the cutting elements to 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 base body, ie. the cutting edge or the cutting edge associated upper cutting surface 4 AT 008 436 U1 is arranged substantially in the tangential direction at the edge region of the disc-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. 5

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 Schen-io Kel 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, a lower and / or a front-side abutment surface which gefläche with the Sitzaufla-15 and / or are in contact with the seat bearing surface of the L-shaped seat, wherein the cutting element and the L-shaped seat are designed positively on their mutual contact surfaces. In a further preferred embodiment, the lower and / or the front-side contact surface of the cutting element in cross-section U-shaped design. 20

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, resulting in an important advantage 30 in this variant, a dual use of the cutting element results in that in a first use the Nachschneiderkante is used, and then after a consumption of the same and after turning by 180 ° during the subsequent second use the Vorschneiderkante is reused. Moreover, at least one type of cutting element may comprise a chip divider, e.g. is formed by an extending in the circumferential direction of the body chipbreaker. Preferably, the chip divider groove formed in or on the cutting surface plane is arranged offset out of center, in two different directions of displacement, wherein the cutting elements successively mounted on the main body alternately have a chip divider grooves arranged in the one and in the other direction of dislocation, whereby a still calmer Tool run with reduced vibration can be achieved.

In a particularly preferred embodiment of the invention, the tool is designed as a disc cutter, and in particular designed as a disc cutter for sawing with different 45 cutting shapes of the cutting elements.

Further advantages, expediencies and developments of the invention will become apparent from the other dependent claims. More details will become apparent from the following description of an embodiment with reference to the drawings. It shows:

Fig. 1 is a schematic front view of a section of the disc-shaped base body of the tool according to an embodiment of the invention: Fig. 2 is a schematic plan view of the detail according to Fig. 1; 5 5 5 AT 008 436 U1

Fig. 3 is a perspective view of a cutting element with pre-cutter and trimmer according to an embodiment of the invention;

FIG. 4 shows the cutting element shown in FIG. 3 in front, on and two side views; FIG.

5 shows a schematic top view of a section of the disk-shaped main body with two cutting elements according to a further exemplary embodiment of the invention;

6 is a perspective view of a cutting element with chip breaker groove according to a further embodiment of the invention. 10 15

FIG. 7 shows the cutting element shown in FIG. 6 in front view, side view and side view; FIG.

8 shows a perspective view of a cutting element with a chip breaker groove according to a further exemplary embodiment of the invention;

FIG. 9 shows the cutting element shown in FIG. 8 in front view, side view and side view; FIG. and

10 is a schematic side view of a section of the disk-shaped main body of the tool according to the embodiment of the invention according to FIG. 1

The preferred exemplary embodiments of the invention illustrated in FIGS. 1 to 10 comprise a tool 1 for machining, in particular for milling and / or sawing methods with high feed speeds, with a disk-shaped base body 20 and with a plurality of edges 3 of the disk-shaped base body 2 arranged, interchangeable cutting elements 4A, 4B, 4C, such as carbide blades, and with fastening means 5 for the detachable attachment of these cutting elements 4A, 4B, 4C at the edge region 3 of the disc-shaped base body 2. The cutting elements 4A, 4B, 4C have a substantially prismatic or cuboidal basic shape with at least one cutting edge 7, whose greatest width b projects beyond the thickness d of the disc-shaped main body 2. In the illustrated embodiments, the cutting width b is about 10 mm, and the slice thickness is about 8 mm. The cutting elements 4A, 4B, 4C have at least one passage hole 6 for receiving the fastening means 5, wherein the fastening means is formed in all embodiments by a fastening screw which in a substantially radial direction according to arrows 9 at the edge portion 3 of the disc-shaped base body. 2 arranged threaded bore 8 engages. Here, the attachment of the cutting elements 4A, 4B, 4C at the edge region 3 of the disc-shaped base body 2 by means of fastening screws 5 in the tangential direction with respect to the circumferential direction or direction of rotation t of the base body disk 2, i. the cutting edge 7 or the cutting edge associated with the upper cutting surface 21 is arranged essentially in the tangential direction on the edge region 3 of the disc-shaped base body 2.

As can be seen in particular from FIGS. 1 and 10, a substantially L-shaped recessed seat 10 in the base body 2 of the work tool 40 is provided with a leg of the L-shaped seat 10 forming seat support surface 11 at the edge region 3 of the disc-shaped base body and formed with a the other leg of the L-shaped seat 10 forming seat bearing surface 12 for receiving the acting on the one substantially prismatic or cuboidal basic shape having cutting elements 4A, 4B, 4C cutting forces. 45 In the edge region 3 of the disc-shaped base body 2, in the form of round recesses which adjoin the L-shaped seats 10, chip spaces 14 are seen in the direction of rotation t, respectively, after the cutting elements 4A, 4B, 4C.

As can further be seen in particular in FIGS. 1 and 10, the cutting element 4A, 4B, 50C has a lower abutment surface 15 and an end abutment surface 16 which engages with the seat abutment surface 11 and the seat abutment surface 12 of the L-shaped seat 10, respectively standing contact with each other, wherein the cutting element 4 and the L-shaped seat 10 are formed positively on their mutual contact surfaces 11 and 15, for example according to the particularly preferred embodiments in the figures, in which the lower contact surface 15 of the cutting element 4 seen in cross-section U -shaped. This will result in a

Claims (12)

6 AT 008 436 U1 particularly good lateral stabilization of the cutting element 4A, 4B, 4C achieved in the recess or the seat 10. Alternatively or additionally, the frontal contact surface 12 seen in cross section may be U-shaped (not shown in detail). In all embodiments shown in the figures, with a tool diameter of about 300 to 500 mm, the cutting width b is about 4 mm, with a tool diameter of about 500 to 800 mm, the cutting width b is about 6 mm, with a tool diameter of about 800 to 1000 mm, the cutting width b is about 8 mm, and with a tool diameter of about 1000 to about 2200 mm, the cutting width b is about 10 to 16 mm. FIGS. 2 to 9 show preferred embodiments of the invention with different types of cutting elements, all of which can be used or fastened on the same disk-shaped base body 2. The embodiment shown in Figs. 2 to 4 shows a cutting element type 4A with two simultaneously or successively usable cutting edges 7 and 7A, namely the cutting edge 7 as a precutter 7 with a slightly emerging from the upper cutting element plane 21 Vorschneiderflächenabschnitt 17 a, to which a Surface portion 17b connects with a larger angle of inclination and extends to the passage opening 6, and formed the 20 cutting edge 7A as a trimmer with the thickness d of the main body 2 superior rebate width b. The advantage of this embodiment of the cutting element 4A is a double use of this cutting element characterized in that at a first use with aligned in the direction of rotation t trim edge 7A this is worn faster because of the protruding width and then after turning by 25 180 ° in the subsequent second use the precutting edge 7 can be used. To use this advantage, it is expedient if, according to Figures 1 and 2, the cutting elements are mounted in an alternating arrangement on the circumference of the base body 2, that is, a cutting element 4A follows in the direction of rotation t oriented cutting edge 7 with such a counter-rotating directionally oriented cutting edge 7. The embodiment shown in FIGS. 5 to 9 shows a cutting element type 4B, 4C with a chip divider 19, which is formed by a chip divider groove 20, 20a extending in the circumferential direction t of the main body 2. Preferably, the chip breaker groove formed in or on the cutting surface plane 21 is offset off-center, in two different directions of displacement, with the cutting elements 4B and 4C attached sequentially to the main body 2, as shown in FIG. 5, alternately one in and one in the Have another displacement direction arranged chip breaker groove 20, 20a, whereby a still quieter tool run with reduced vibration can be achieved. 40 claims: 1. Disc milling tool for milling or sawing metal blanks, in particular metal tubes or metal billets, having the following features: 45 - the tool has a disk-shaped base body (2), on or on its edge region (3) a plurality of interchangeable cutting elements ( 4A, 4B, 4C), in particular hard metal knives, are arranged, - at the edge region of the disc-shaped main body (2), seats (10) are formed for at least partially receiving or at least abutting the cutting elements (4A, 4B, 4C). wherein the cutting elements (4A, 4B, 4C) are in frictional or positive contact with the seats (10) in mutual contact or at least with or on the seats (10) abut or are received, that at least transverse to the disc plane on the cutting elements ( 4A, 4B, 4C) acting cutting forces of the respective seats (10), 55 - to the edge region (3) of the disc-shaped Base body (2) formed seats close to chip spaces (14), - the cutting elements (4A, 4B, 4C) have a substantially prismatic or cuboidal basic shape with at least one cutting edge whose width (b 5) the cutting elements (4A, 4B, 4C) have at least one passage bore (6) for receiving a fastening means, the fastening means being formed by a fastening screw (5), which engages in a substantially in the radial direction (9) at the edge region (3) of the disk-shaped base body (2) arranged threaded bore (8). 10 2. Tool according to claim 1, characterized in that the attachment of the cutting elements (4A, 4B, 4C) at the edge region (3) 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 disk (2), ie the cutting edge (7) or the upper cutting surface (21) arranged in the cutting edge is arranged substantially in the tangential direction on the edge region (3) of the disc-shaped base body (2). 3. Tool according to claim 1 or 2, characterized in that at the edge region of the disc-shaped base body (2) a substantially L-shaped recessed seat (10) in the base body 20 of the tool with a leg of the L-shaped seat form the 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 (4A, 4B, 4C) cutting forces. 25 4. Tool according to claim 3, characterized in that the cutting element (4 A, 4 B, 4 C) 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 (4A, 4B, 4C) and the L-shaped seat 30 (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 contact surface of the cutting element (4A, 4B, 4C) is designed in cross-section U-shaped. 35 6. Tool according to one of the preceding claims, characterized in that different cutting element types are formed, which on the same base body (2) can be used or fastened, and of which at least one cutting element type (4A, 4B, 4C) more, at least two consecutively usable Cutting edges (7, 7A) 40 has. 7. Tool according to claim 6, characterized in that the cutting element (4A) has two simultaneously or successively usable cutting edges (7, 7A), namely a first cutting edge (7) and a second cutting edge (7A), which on gegenüberliegen- 45th the sides of the cutting surface are arranged, wherein the first cutting edge (7) as a pre-cutter, and the second cutting edge (7A) is formed as a trimmer. 8. Tool according to claim 7, characterized in that the first cutting edge (7) is formed as a preliminary cutter (7) with a slightly out of the upper cutting element plane (21) out 50 passing Vorschneiderflächenabschnitt (17 a), to which a surface portion (17 b) connects with a larger angle of inclination and extends up to the passage opening (6), and the second cutting edge (7A) is formed as a trimmer with a the thickness (d) of the base body (2) superior Nachschneiderbreite (b). 9. Tool according to claim 6, 7, or 8, characterized in that at least one 8 AT 008 436 U1 cutting element type (4A, 4B, 4C) has a chip divider (19) which by a running in the circumferential direction of the body Spanteilemut (20, 20a) is formed. 10. Tool according to one of the preceding claims, characterized in that it is 5 as a disc cutter for sawing with different cutting element shapes of the cutting elements (4A, 4B, 4C) is formed. 11. Tool according to one of the preceding claims, characterized in that with a tool diameter of about 300 to 500 mm, the cutting width about 4 mm, io a tool diameter of about 500 to 800 mm, the cutting width about 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. Therefor 3 sheet drawings 20 25 30 35 40 45 50 55