DE102014111637A1 - Cassette for a router - Google Patents

Abstract

The invention relates to a cassette for a milling cutter, with a cutter support and a clamping member, which together form a generally cuboidal cassette, wherein the cutter support and the clamping member are loosely placed together and define a mounting opening for a fastening screw, with which the cassette in a receptacle of a Milling cutter can be attached, wherein the cutter support has a seat for a cutting insert. The invention further relates to a milling cutter with at least one receptacle for a cassette and at least one such cassette. A gap S between the blade carrier and the clamping member is positioned under the cutting tip of the cutting insert to prevent chips from getting stuck in the gap S.

Description

CLAIM OF PRIORITY

The present application is a continuation-in-part of the application filed on May 15, 2013, with serial no. 13 / 894,497, which is a filing for national filing filed on May 16, 2012 German Application No. 10 2012 009 739.5 the entire contents of these two applications are hereby incorporated by reference

FIELD OF THE INVENTION

The invention relates to a cassette for a milling cutter, by means of which a cutting insert can be adjustably mounted on the milling cutter. The invention further relates to a milling cutter with such a cassette.

BACKGROUND OF THE INVENTION

Such a cutter with a cartridge is basically from the EP 1 753 577 B1 known. The cassette can be adjusted by means of a fixing screw and an adjusting screw adjustable in a receptacle on the cutter. If the cutting insert of the cassette is worn, the cutting insert can be reworked or the entire cassette must be replaced.

SUMMARY OF THE INVENTION

The object of the invention is to develop the known cassette to the effect that the efficiency of the milling system used is increased.

To achieve this object, a cartridge for a router is provided according to the invention, with a cutter support and a clamping member, which together form a generally rectangular cassette, the blade carrier and the clamping member are loosely placed together and together delimit a mounting hole for a mounting screw, with the cassette can be mounted in a receptacle of a milling cutter, wherein the blade carrier has a seat for a cutting insert. The invention is based on the idea of dividing the previously known cassette into two loose juxtaposed parts, one of which carries the cutting insert and the other serves for clamping and support. Together, the two parts together form the cassette, which corresponds in terms of their dimensions to the previously known cassette. In this way, the previously used cartridges can be replaced by the new cartridges. The particular advantage of the new, split cassettes is that in case of wear, only a part of the cassette must be replaced, namely the blade carrier, while the other part, so the clamping part, can be used. This reduces the operating costs.

According to one embodiment, it is provided that the cutting insert is fixedly mounted on the blade carrier, in particular soldered or glued into the seat. This is particularly advantageous when cutting inserts of PCD (polycrystalline diamond) are used.

According to an alternative embodiment it is provided that the cutting insert is inserted into the seat on the blade carrier. This makes it possible to reduce the operating costs again, as in the case of wear only the cutting insert and not the blade carrier must be replaced.

It is preferably provided that the cutting insert is locked against displacement in at least one direction positively in the seat. In this way, the cutting insert is already reliably fixed in the seat when the cassette is only temporarily pre-mounted on the cutter and not yet firmly clamped.

According to one embodiment of the invention, it is provided that the clamping part has a supporting portion which defines an end face of the cassette facing away from the seat for the cutting insert. This ensures that a continuous, non-split surface is available for positioning the cartridge.

Preferably, it is provided that the support section ends just above the bottom surface of the cutter support. This prevents that it can come in the assembled state of the cassette for a mechanical overdetermination.

According to a preferred embodiment of the invention it is provided that the dividing line between the blade carrier and the clamping part, relative to a center line of the fastening opening, extends closer to the clamping part than to the blade carrier. This offset, which may be in particular of the order of 20% of the smallest diameter of the attachment opening, has proved to be particularly advantageous in mechanical terms.

It is preferably provided that the clamping part has a clamping surface which is located at the end remote from the support portion of the clamping part and is supported on the blade carrier in the region of the seat or in the vicinity thereof. The clamping surface can be used on the one hand to transmit the applied clamping force on the cutter support. If a separate insert inserted in the seat is used, the On the other hand clamping surface can be used to clamp the cutting insert firmly in the seat.

According to a preferred embodiment of the invention, there is a slot between the cutting part and the clamping part, which extends from the clamping section over the region of the fastening opening to the supporting section. The slot is also used to avoid over-determination, so that it is reliably ensured that the desired clamping force is applied over the clamping surface.

According to one embodiment of the invention, at least one coolant channel is provided in the clamping part. This makes it possible to supply coolant to a cutting edge on the cutting insert.

The coolant channel may extend from a side surface of the clamping member to an outer surface of the clamping member disposed above the seat for the cutting insert. It can also be provided that the coolant channel extends from an upper side of the clamping part to this outer surface. The course of the coolant channel can be flexibly adapted to the cutter and the arrangement of coolant supply openings on the cutter.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will be described below with reference to various embodiments, which are illustrated in the accompanying drawings. In these show:

1 a schematic bottom view of a cutter according to the invention with cassettes according to the invention;

2 the router of 1 in a side view;

3 the router of 1 in a perspective view;

4 a side view of a cassette according to the invention;

5 a top view of the cassette of 4 ;

6 a front view of the cassette of 4 ;

7 a first perspective view of a cassette according to a first embodiment of the invention;

8th a second perspective view of the cassette according to the first embodiment;

9 the blade carrier of the cassette according to the first embodiment in a perspective view;

10 the clamping part of the cassette according to the first embodiment in a perspective view;

11 a perspective view of a cassette according to a second embodiment;

12 a perspective view of a cassette according to a third embodiment;

13 in a broken plan view of a cutting support with cutting insert for a cassette according to a fourth embodiment;

14 a side view of a cassette according to a fourth embodiment;

15 a top view of the cassette of 14 ; and

16 a front view of the cassette of 14 ,

DETAILED DESCRIPTION OF THE INVENTION

In the 1 to 3 is a router 1 shown a tool body 2 having generally cylindrical or hollow cylindrical shape. The tool body may be made of aluminum, titanium, steel or other suitable material. The tool body 2 carries on its lateral lateral surface 3 a variety of cassettes 4 on the outer circumference of the tool body 2 are arranged evenly distributed. Alternatively it is possible that the cassettes 4 with irregular pitch on the outer circumference of the tool body 2 are arranged. Between the cassettes 4 are in the tool body 2 in the area of the lateral surface 3 each Spanleitnuten 6 intended. These border directly on chip guiding surfaces 7 in each cassette 4 are integrated.

Every cassette 4 is on the tool body 2 in a recording 21 attached, which the respective cassette 4 tightly encloses. For attachment to the tool body is a fixing screw 23 provided through the cassette 4 extends through. For precision adjustment of the position of the cassette, each cassette is an adjusting screw 32 assigned.

For further details of attaching the cassettes 4 and their adjustment at the router 1 will be on the EP 1 753 577 directed.

In the 4 to 10 is a first embodiment of the cassettes 4 shown. Each cassette consists of a cutter carrier 40 and a clamping part 70 , which are designed as separate, separate components and assembled to give the generally cuboidal cassette (see 4 ), through which a mounting hole 72 extends.

The blade carrier 40 itself again is generally cuboid (see 9 ) and has a cutting insert at one corner 42 up, stuck here with the cutter carrier 40 connected is. The cutting insert 42 may for example consist of PCD and in a suitably shaped seat 44 on the cutter carrier 40 be soldered or glued.

The blade carrier 40 is further provided with a recess, which is part of the mounting hole 72 is. As in 4 can be seen, is the center axis M of the mounting hole 72 below the parting line between the cutter carrier 40 and the clamping part 70 , so that the distance between the two edges of the recess for the attachment opening, measured on the basis of the figures upper edge of the blade carrier 40 , smaller than the diameter of the mounting hole. The mounting hole itself has a constant diameter portion A defining the smallest diameter of the mounting hole, a portion B widening conically, and a portion C of again constant diameter.

As far as terms such as "top", "bottom", "front" etc. are used, these only refer to the representation in the drawings. In practice, the cassette can be used in any orientation, and in use, the orientation in space changes depending on the orientation and rotation of the miller.

The clamping part 70 is generally L-shaped in a side view and has a clamping surface on one side 74 on, which is intended to rest on the cutter carrier 40 support, and at the opposite end a support section 76 That's the one from the cutting insert 42 opposite outer side of the cutter carrier 40 embraces.

The clamping part 70 is at its front, from the support section 76 opposite end with the Spanleitfläche 7 Mistake. This ends at a small distance from the seat 44 for the cutting insert 42 ,

Furthermore, in the clamping part 70 the "rest" of the mounting hole 72 provided in the form of a recess.

If the clamping part 70 on the cutter carrier 40 is attached (see in particular 4 ), the supporting section ends 76 at a small distance a above the plane passing through the bottom surface B of the cutter carrier 40 is defined. In this way, the outer contour of the cassette 4 , based on 4 , on the top and the back of the cassette alone by the outer surfaces of the clamping part 70 and on the bottom only by the bottom surface B of the cutter carrier 40 Are defined. In particular, this results in the area of the adjusting screw 32 a continuous, uniform contact surface 78 , The dimensions of the cutter carrier 40 and the clamping part 70 are chosen so that the clamping part 70 only in the area of the clamping surface 74 , ie at its front end, on the cutter carrier 40 supports and otherwise a gap S between cutter carrier 40 and clamping part 70 is present, extending from the clamping surface 74 over the area of the mounting hole 72 extends into the area in which the support section 76 located.

The cassette 4 will be in the appropriate recording 21 of the milling cutter 1 so used that the cutting insert 42 lies on the outside. By means of the fixing screw 23 the cassette is fixed in the receptacle with the fixing screw 23 as such strives, the two parts cutter carrier 40 and clamping part 70 force apart. Due to the dimensions and the shape of the picture 21 However, the two parts are firmly held together as a unit and can be adjusted properly in the recording.

If the cutting insert 42 worn, this can either be reworked or together with the cutter carrier 40 be replaced. The clamping part 70 however, it can be used in any case.

In 11 a cassette according to a second embodiment is shown. The difference from the first embodiment is that in the clamping part 70 a coolant channel 80 is provided, which is located between the Spanleitfläche 7 and, based on 11 , the top of the clamp 70 extends. This way, if the cassette 4 in the router 1 is mounted, via a coolant supply opening, in one of the side surfaces of the receptacle 21 the cutter is arranged, coolant targeted towards the cutting insert 42 be directed.

In 12 a third embodiment is shown, which differs from the second embodiment by the arrangement of the coolant channel 80 different. In the third embodiment, the coolant passage ends 80 on a side surface of the cassette 4 allowing coolant to flow through a coolant supply port located at the bottom of the intake 21 in the router 1 is provided, to the cutting insert 42 or more precisely, can be passed to the cutting edge.

In 13 a fourth embodiment is shown which differs from the first three embodiments in terms of the cutting insert 42 different. In the fourth embodiment, the cutting insert is 42 not firmly soldered, but is designed as an indexable insert, which in the seat 44 is inserted. There it is fixed by means of the clamping action, that of the clamping part 70 and in particular of its clamping surface 74 is exercised.

In addition, the cutting insert 42 positive fit in the seat 44 locked. For this purpose, holding projections 50 provided at the seat, in suitable recesses 52 on the cutting insert 42 intervention.

Also in the fourth embodiment can coolant channels in the clamping part 70 be provided.

The 14 to 16 show a fifth embodiment, relating to the relative position of the gap S between the cutter carrier 40 and the clamping part 70 and the cutting tip 82 of the cutting insert 42 different from the first four embodiments. In particular, the gap S is under the cutting tip 82 of the cutting insert 42 positioned as in the 14 and 16 shown. As a result, chips formed during a cutting operation are prevented from getting stuck in the gap S.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102012009739 [0001]
• EP 1753577 B1 [0003]
• EP 1753577 [0035]

Claims (13)

Cassette for a milling cutter, comprising a cutter support and a clamping member, which together form a generally parallelepiped-shaped cassette, wherein the cutter support and the clamping member are loosely stacked and together define a mounting opening for a fastening screw, with which the cassette can be mounted in a receptacle of a milling cutter wherein the blade carrier has a seat for a cutting insert with a cutting tip, wherein a gap S between the blade carrier and the clamping member is positioned below a cutting tip of the cutting insert. The cartridge of claim 1, wherein the cutting insert is fixedly mounted on the blade carrier. A cartridge according to claim 1, wherein the cutting insert is inserted in the seat on the blade carrier. Cassette according to claim 3, wherein the cutting insert is locked against displacement in at least one direction positively in the seat. A cartridge as claimed in claim 1, wherein the clamping member has a support portion defining a face of the cartridge remote from the seat for the cutting insert. A cartridge according to claim 5, wherein the support portion terminates short above the bottom surface of the cutter support. A cartridge according to claim 1, wherein the dividing line between the blade carrier and the clamping member, with respect to a centerline of the mounting aperture, is closer to the clamping member than to the blade carrier. Cassette according to claim 1, wherein the clamping part has a clamping surface which is located at the end remote from the support portion of the clamping part and is supported on the blade carrier in the region of the seat or in the vicinity thereof. A cartridge according to claim 1, wherein there is a slot between the blade carrier and the clamping member extending from the clamping surface across the region of the mounting aperture to the support portion. Cassette according to claim 1, wherein at least one coolant channel is provided in the clamping part. The cartridge of claim 10, wherein the coolant channel extends from a side surface of the clamping member to an outer surface of the clamping member disposed above the seat for the cutting insert. A cartridge according to claim 10, wherein the coolant channel extends from an upper surface of the clamping member to an outer surface of the clamping member disposed above the seat for the cutting insert. Milling cutter with at least one receptacle for a cassette and at least one cassette according to claim 1.

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