EP2866964A1

EP2866964A1 - Tool for machining

Info

Publication number: EP2866964A1
Application number: EP13732479.4A
Authority: EP
Inventors: Nadine HERBERTH; Jose AGUSTIN-PAYA
Original assignee: Ceramtec GmbH
Current assignee: Ceramtec GmbH
Priority date: 2012-06-28
Filing date: 2013-06-27
Publication date: 2015-05-06
Also published as: US20150290716A1; KR20150036237A; CN104379281A; DE102013212459A1; WO2014001447A1; CA2875474A1; BR112014032564A2; JP2015521549A

Abstract

The invention relates to a tool (1) for machining, having a parent holder (11), an insert seat (5), a clamping shoe (4) having a clamping shoe arm (7) and an end-side clamping shoe head (8), and a cutting insert (10). In order both to increase the service life of the cutting inserts and to break the long chips that arise during cutting or to keep said chips short, it is proposed that the clamping shoe (4) is connected to the parent holder (11) and in the tool at least one coolant line (6) is passed through the parent holder (11) and the clamping shoe (4) as far as the clamping shoe head (8), said coolant line(s) leading into at least one discharge nozzle (3) on the clamping shoe head (8).

Description

Tool for machining

The invention relates to a tool for machining with a

Basic holder, a plate seat, a clamping claw and an insert.

The tool or the tool system is particularly suitable for the machining of metallic materials, preferably ductile, heavy

machinable materials.

There are known tools in which the cutting plate with separate

Components, also called Spannpratzen or clamping fingers are fixed. Furthermore, tools are known which have an internal coolant supply. However, in these tools, the spout nozzles are far away from the cutting edge of the insert and made relatively large from the nozzle cross-section, so that they are not suitable for high pressure.

Furthermore, tools are known in which the base holder and the insert seat consist of one part.

The invention has for its object to improve a tool according to the preamble of claim 1 so that on the one hand increases the service life and life of the cutting plates and on the other hand, the costs incurred during machining long chips are broken or kept short.

This is achieved by the features of claim 1 according to the invention.

The fact that the clamping claw is connected to the basic holder and in the tool through the basic holder and the clamping claw to the clamping head At least one coolant line is guided, which opens / lead into at least one spout nozzle on the clamping head, on the one hand by the cooling liquid, which is guided by the clamping claw, increases the service life and life of the cutting plates and on the other hand can / can the spout nozzle / spout nozzles are aligned in that the escaping coolant breaks or briefly holds the long shavings that occur during machining.

Preferably, the clamping claw is integrally formed with the base holder. However, the clamping claws, also called clamping fingers, can also be designed as an exchangeable element (ie not in one piece). In this case, the clamping claw must be attached to the base holder so that the coolant lines are connected to each other.

Preferably, the clamping head has at least one end face, wherein the pouring nozzle / pouring nozzles is arranged on the at least one end face / are. In the case of several end faces, these are preferably angled away from one another.

In an advantageous embodiment, the spout nozzle / spout nozzles is / are arranged on an upper and / or a lower spout nozzle row, with "top" and "bottom" the position is designated to the insert surface. The cooling liquid is thereby directed from the spout nozzle / spout nozzles on the lower spout nozzle row directly onto the cutting edge of the cutting plate and out of the spout nozzle / spout nozzles on the upper spout nozzle row onto the resulting chips. In one embodiment, two spout nozzles are disposed on the upper spout nozzle row and four spout nozzles on the lower spout nozzle row. Depending on the available space, any number of spout nozzles can be arranged. The spout nozzles can be arranged arbitrarily. In a preferred embodiment, the spout nozzle / spout nozzles on the lower spout nozzle row are / are directed onto the cutting edge of the cutting plate and / or are / are the

Discharge nozzle / nozzle nozzles on the upper spout nozzle row directed to the workpiece to be machined, in particular to the resulting chips during machining. The chips are kept so small.

The two spout nozzle rows can be adjusted according to the requirements

align. Preferably, the two spout nozzle rows include an angle β greater than 80 ° and less than 160 °. Particularly preferably, the angle β is between 120 ° and 160 °. As a result, the spout nozzles can be targeted.

The distance a from the spout nozzle / spout nozzles to the cutting edge of the

Cutting plate is preferably in the range 1, 5 - 10 mm, preferably 3 - 5 mm. Thus, the coolant hits the cutting edge and shavings immediately after exiting the spout nozzle (s) immediately.

The diameter of the coolant line is preferably 0.5-3.0 mm, preferably 1, 0-1.5 mm. This allows a high pressure

Maintain and promote a sufficient amount of cooling liquid to the / the spout nozzle / spout nozzles.

The clamping claw is preferably made of steel and the clamping head made of hard material, preferably ceramic or hard metal and is preferred as an attachment replaceable attached to Spannpratzenarm. The clamping head can also have a face protection of hard material, preferably ceramic or hard metal. This extends the service life.

Preferably, the Spannpratzenarm, in particular the clamping head, with not clamped cutting plate, resiliently formed to the base holder, preferably by a material recess at the transition to the base holder. This facilitates the clamping of the cutting plate. In one embodiment of the invention, the insert seat is integrally formed U-shaped with a insert seat middle portion and two each arranged at the ends of the insert seat center section insert seat legs, wherein a

Insert seat leg is designed as an L-shaped insert seat leg with a hook arranged at the end and the hook is formed substantially perpendicular to the insert seat leg. This embodiment allows the

Interchangeability of the insert seat on the basic holder.

The hook-shaped design can also be square, or be defined as a curved line.

In one embodiment of the invention, the undercut has a slope or a curved line and the hook has a counter bevel or

Counter curve line and is in the installed state of the insert seat, the counter slope on the slope or the curved line on the counter-curve line. Even if the insert seat were not fastened by screws to the basic holder, it could not thereby slip forward, towards the workpiece. This promotes the hold and precise positioning of the insert seat. To further anchor the plate seat on the base holder in each case a mutually aligned first bore are introduced in Spannpratzenarm and in the L-shaped insert seat leg and is arranged in the base holder a first aligned threaded hole. As a result, the insert seat can be anchored at its upper, facing the clamping claw end by a screw.

In addition, or only alone, can be arranged in the non-L-shaped insert seat leg, a second bore which is provided with a second threaded hole in the

Base holder is formed aligned. As a result, the plate seat can be anchored at its lower, the clamping claw end facing away by a screw.

This lower end can also be designed wedge-shaped.

In the following, the invention will be explained further with reference to FIGS. Show it:

1 shows a section through a variant of a tool 1 according to the invention

2 shows the end-side part of a Spannpratzenarms 7,

3 shows a section through an inventive tool 1 with an am

Basic holder fixed clamping claw,

4 shows a section through an inventive tool 1 with a

Spannpratzenkopf as attachment,

5 shows a section through an inventive tool 1 with a

FIG. 6 shows a section through an alternative tool 1 according to the invention and FIG. 7 enlarges the region X of the clamping head of FIG. 6 from the curve line and a counter-curve line on the hook or undercut.

FIG. 1 shows a section of a part of a tool 1 according to the invention. This tool 1 consists of a base holder 1 1, on which a

Clamp 4 an insert 10 is mounted on a plate seat 5. The clamping claw 4 is formed integrally with the base holder 1 1 and consists of a Spannpratzenarm 7, which merges on the one hand in the basic holder 1 1 and on the other hand at its end a clamping head 8 has. Of the

Spannpratzenarm 7 is so long that it springs easily. The clamping head 8 rests with inserted and fixed cutting plate 10 on the cutting plate 10 and presses it on a replaceable insert seat 5, which will be described in more detail later. In Spannpratzenarm 7, a first bore 22 for clamping the cutting plate 10 by means of a clamping screw 27 is arranged. Later this will be discussed in detail.

The clamping head 8 has a support surface 28 which rests on inserted cutting plate 10 on this. In addition, the clamping head 8 has a substantially perpendicular to the longitudinal axis 26 (see Figure 2) of the

Spannpratzenarms 7 arranged end face 9. Figure 2 shows this enlarged.

On this end face 9 pouring nozzles 3 are arranged, which communicates with at least one coolant line 6 in the clamping claw 4 in connection. By means of this coolant line 6, cooling fluid is passed directly to the cutting plate. The coolant line 6 extends through the base holder 1 1 and the Spannpratzenarm 7 to the spout nozzles 3 on the end face 9 of the clamping head 8.

The individual spout nozzles 3 have a cross-sectional / diameter range of 0.5 to 3.0 mm, preferably 1, 0 to 1, 5 mm. As a result, they are suitable for high pressure.

The tool 1 is designed such that coolant through the

Coolant line 6 under high pressure (30-400 bar) flows through the tool 1 to the immediate vicinity of the cutting edge 2 of the cutting plate 10. Of the Distance a (see Figure 1) of the spout nozzles 3 to the cutting edge 2 is in the range 1, 5-10 mm, preferably 3-5 mm.

At least three of these spout nozzles 3 are preferably provided on the end face 9 of the clamping head 8, whereby a lower 13 and an upper spout nozzle row 12 are always formed. By "top" and "bottom" is meant the position to the cutting surface. In the case of the minimum number of three

Spout nozzles 3, two spout nozzles 3 are arranged below and a spout nozzle 3 above. Are more than three spout nozzles 3 on the end face 9 of the clamping head 8, so can any variant

Possible combinations, depending on the application, are defined with a number of lower and a number of upper spout nozzles 3.

The special feature of the invention is that the cooling liquid is passed through the base holder 1 1 and through the clamping claw 4. The base holder 1 1 and the clamping claw 4 preferably form a single unit, but may also consist of two or more components, such as a base holder 1 1 and a separate clamping claw. When attaching the clamping claw, it must be ensured that the coolant lines 6 of both parts merge into one another.

The spout nozzle / spout nozzles 3 on the lower spout nozzle row 13 are preferably aligned with the cutting edge 2 of the cutting plate 10 and the

Spout nozzle / spout nozzles 3 on the upper spout nozzle row 12 are preferably directed to the workpiece to be machined, in particular to the resulting chips during machining.

Another special feature of the invention is that preferably the insert seat 5, also called insert seat, can be exchanged. The cutting plates 10 are preferably indexable inserts. So that the insert seat 5 is interchangeable, the Base holder 1 1 below the clamping claw 4, an L-shaped recess 18 with an undercut 19. On this undercut 19, a slope 20 is arranged. The insert seat 5 is U-shaped with a insert seat midsection 14 and formed at the two ends of the insert seat midsection 14 with insert seat legs 15 extending substantially perpendicularly from the insert seat midsection 14. On the plate seat central portion 14, a recess for direct or via an intermediate piece indirect recording of a cutting plate 10 is provided. The

Cutting plate has on its underside preferably a prism, which is arranged in a recess adapted thereto in the insert seat 5 or a plate seat receptacle 33. Through this prism, the insert is when occurring

Side forces securely anchored. This prismatic education is for everyone

presented embodiments of advantage. But also other types of inserts of various shapes and sizes can be used here.

So that the insert seat 5 can be anchored on the base holder even without the fastening by a clamping screw, a insert seat leg 15 is designed as an L-shaped insert seat leg 16. L-shaped means that a substantially right-angled hook 17 is arranged at the end of the insert seat leg 15. The insert seat leg 15 together with the hook 17 form the L-shaped insert seat leg 16. The hook 17 has at its to

Base holder 1 1 side facing a counter-slope 21, which is adapted to the slope 20 at the undercut 19.

The insert seat 5 is laterally, perpendicular to the longitudinal axis 26 of the clamping claw 4 in the L-shaped recess 18 on the base holder 5 inserted, the hook 17 hooked to the L-shaped insert seat leg 16 with the undercut 19. Because of this The plate seat 5 can not snag towards the front, ie slip out in the direction of the workpiece to be machined.

For further attachment, but primarily for clamping the cutting plate 10 on the insert seat 5 is in Spannpratzenarm 7 and the L-shaped insert seat leg 16 a mutually aligned first bore 22 is present, wherein the base holder 1 1 arranged an aligned first threaded hole 23. With a clamping screw 27, which is screwed through the first bore 22 in the first threaded hole 23, the clamping claw 4, and the Spannpratzenarm 7 in

Press the direction of the cutting plate 10, so that the cutting plate 10 is pressed and clamped on the plate seat 5 or the plate seat receptacle 33 on the insert seat.

In addition, a second bore 24 may preferably be introduced in the non-L-shaped insert seat leg, which merges into a second threaded bore 25 in alignment. With another tightening screw 29, the insert seat 5 can be additionally anchored.

Figure 2 shows in cross section an enlarged section of Spannpratzenarms 7. In order to ensure clarity, in FIG

Coolant lines 6 not shown. Shown is, however, the clamping head 8 with the spout nozzles 3 on the end face 9. Good to see that the

Spout nozzles 3 on two spout nozzle rows 12, 13 are arranged. In the illustrated embodiment, two are located on the upper spout nozzle row 12 and a spout nozzle 3 is disposed on the lower spout nozzle row 13. The two spout nozzle rows 12, 13 can be aligned depending on the requirements. In the embodiment shown in Figure 1, the two spout nozzle rows 12, 13 enclose an angle of β = 150 °. Preferably, an angle ß greater than 80 ° and less than 160 °. Particularly preferred is an angle ß - in

between 120 ° and 160 °. As a result, the spout nozzles 3 can be targeted.

FIG. 3 shows a section through a tool 1 according to the invention with a clamping claw 4 fastened to the basic holder 11. In this embodiment, FIG

Clamp 4 a separate part and not formed in one piece with the base holder 1 1, as in the embodiment of Figure 1. It is in the attachment of the clamping claw 4 on the base holder 1 1 make sure that the

Coolant lines 6 are connected to each other. Another difference from the embodiment according to FIG. 1 is that the bevel 20 is here replaced by a curved line 30 and the counter bevel 21 by a counter-curve line 31. Otherwise there is no difference to the embodiment according to FIG. 1. Like reference numerals show like parts. FIG. 4 shows a section through a tool 1 according to the invention with a clamping claw 4 fastened to the basic holder 11, which is formed integrally with the basic holder 11, as in the embodiment according to FIG. So that the clamping claw springs is at the transition from Spannpratzenarm 7 to the basic holder 1 1 a

Material recess 32 is arranged. In this embodiment, the

Material recess 32 formed hemispherical. Otherwise, this embodiment differs in that the clamping head 8 is connected as a separate component of, for example, ceramic with the Spannpratzenarm 7. Another difference from the embodiment of Figure 1 is that the slope 20 here by a curved line 30 and the counter bevel 21 by a

Counter-curve line 31 are replaced. Otherwise there is no difference to

Embodiment according to FIG. 1 Like reference numerals show like parts.

FIG. 5 shows a section through a tool 1 according to the invention with a clamping claw 4 fastened to the basic holder 1 1. shaped insert seat leg 34, as well as the abutting portion 35 of the

Base holder 1 1 wedge-shaped.

In all embodiments shown, the cutting plate 10 sits on one

In all embodiments shown, the cutting plate 10 on its underside a wedge 36 (see Figure 6) and the plate seat receptacle 33 has a recess adapted thereto. To this wedge 36 one also says prism. FIG. 6 shows a section through a tool 1 according to the invention with a special clamping head 8. FIG. 7 shows the area X from FIG. 6 with the clamping head 8 from FIG. 6 enlarged.

The clamping head 8 according to the figures 6 and 7 has a plurality of end faces 9, which are angled to each other. From one front end face 9a, one side end face 9b and 9c respectively descends. On this end face 9a and side end faces 9b, 9c four spout nozzles 3a, 3b, 3c are arranged, which are arranged on a lower spout nozzle row 13. This lower spout nozzle row 13 runs parallel to the top 38 of the cutting plate 10. Above the lower spout nozzle row 13, an upper spout nozzle row 12 is arranged, on which two spout nozzles 3 are arranged. These upper spout nozzle row 12 runs parallel to the top 38 of the cutting plate 10. As can be clearly seen in Figure 7, the 4 spout nozzles 3a, 3b, 3c, 3d are directed to the cutting plate 10, preferably on the cutting edge of the cutting plate 10. The two

Discharge nozzles 3 on the upper spout nozzle row 12 are directed to the resulting chips 37. The chips are kept so small.

The invention is characterized in that machining operations are optimized such that A) the life of the cutting plates 10 is increased,

B) that the long chips are kept short and

C) that the insert seat 5 can be replaced individually, if necessary, partially.

With cutting plate is generally understood a cutting insert and vice versa.

Claims

claims

1 . Tool (1) for machining with a base holder (1 1), a plate seat (5), a clamping claw (4) with a Spannpratzenarm (7) and an end-side clamping head (8), and a cutting plate (10), characterized in that the clamping claw (4) is connected to the basic holder (11) and at least one cooling liquid line (6) is guided in the tool through the basic holder (11) and the clamping claw (4) up to the clamping head (8) a spout nozzle (3) on the clamping head (8) opens / open.

2. Tool according to claim 1, characterized in that the clamping claw (4) is formed integrally with the base holder.

3. Tool according to claim 1 or 2, characterized in that the clamping head (8) has at least one end face (9), wherein the spout nozzle / spout nozzles (3) on the at least one end face (9) is arranged / are.

4. Tool according to claim 3, characterized in that at a plurality of end faces (9) they are angled to each other.

5. Tool according to one of claims 1 to 4, characterized in that the spout nozzle / spout nozzles (3) on an upper (12) and / or a lower

Spout nozzle row (13) are arranged, wherein with "top" and "bottom" the position is designated to the insert surface.

6. Tool according to claim 5, characterized in that two spout nozzles (3) on the upper spout nozzle row (12) and four spout nozzles (3) on the lower spout nozzle row (13) are arranged.

7. Tool according to claim 5 or 6, characterized in that the

Spout nozzle / spout nozzles (3) on the lower spout nozzle row (13) on the cutting edge (2) of the cutting plate (10) are directed and the

Spout nozzle / spout nozzles (3) are directed on the upper spout nozzle row (12) on the workpiece to be machined, in particular on the chips produced during machining.

8. Tool according to one of the preceding claims, characterized

in that the distance a from the pouring nozzle / pouring nozzle (3) to the cutting edge (2) of the cutting plate (10) is in the range 1, 5 - 10 mm,

preferably 3 - 5 mm.

9. Tool according to one of the preceding claims, characterized

in that the diameter of the coolant line (6) is 0.5 to 3.0 mm, preferably 1, 0 to 1, 5 mm.

10. Tool according to one of the preceding claims, characterized

characterized in that the clamping claw (4) consists of steel and the

Clamping head (8) made of hard material, preferably ceramic or hard metal and is attached as an attachment to Spannpratzenarm (7).

1 1. Tool according to one of the preceding claims, characterized

characterized in that the Spannpratzenarm (7), in particular the

Spannpratzenkopf (8), in non-clamped cutting plate (10), resilient to the base holder (1 1) is formed, preferably by a material recess (32) at the transition to the base holder (1 1).

12. Tool according to one of the preceding claims, characterized

in that the insert seat (5) is integrally U-shaped with a

Insert seat middle portion (14) and two respectively at the ends of the insert seat center portion (14) arranged insert seat legs (15) is formed, wherein a insert seat leg (15) as an L-shaped insert seat leg (16) with an am End arranged hook (17) is formed and the hook (17) is formed substantially perpendicular to the insert seat leg (15).

13. Tool according to claim 12, characterized in that the base holder (1 1) below the clamping claw (4) has an L-shaped recess (18) with an undercut (19) and the insert seat (5) laterally, perpendicular to

Longitudinal axis of the clamping claw in the L-shaped recess (18) can be inserted and the hook (17) on the L-shaped insert seat leg (16) with the

Undercut (19) hooked.

14. Tool according to claim 13, characterized in that the undercut (19) has a bevel (20) or a curved line (30) and the hook (17) adapted thereto a counter bevel (21) or counter-curve line (31) and in the installed state of the insert seat (5) the counter bevel (21) on the

Bevel (20) or the curved line (30) on the counter-cam line (31).

15. Tool according to one of claims 12 to 14, characterized in that in the Spannpratzenarm (7) and in the L-shaped insert seat leg (16) each have a mutually aligned first bore (22) are introduced and in

Base holder (1 1) a first aligned threaded bore (23) is arranged.

16. Tool according to one of claims 12 to 15, characterized in that in the non-L-shaped insert seat leg (34) has a second bore (24). is arranged, which is formed with a second threaded bore (25) in the base holder (1 1) in alignment.

17. Tool according to one of claims 12 to 16, characterized in that the non-L-shaped insert seat leg (34) is wedge-shaped.