DE102019111843A1 - Cutting tool - Google Patents

Abstract

In the case of a cutting tool with a basic tool holder (1), an insertion rod (2) of an interchangeable head (3) being insertable into an insertion opening (10) of the basic tool holder (1), the insertion rod (2) being inserted in the basic tool holder (1) by a screw element (4) can be fixed, which can be effectively connected to a screw opening (5), the interchangeable head (3) consists of the insertion rod (2) and a tool holder (6), the insertion rod (2) having a recess (7) with an inclined stop ( 8), wherein in the fixing position the screw element (4) can be screwed with a cylinder tip through the screw opening (5) to the inclined stop (8) in a fixing manner.

Description

Technical area

The invention relates to a cutting tool according to the preamble of claim 1 and of the independent claim 2.

State of the art

Such cutting tools are already known and used in a wide variety of forms and designs. For example, in the DE 20 2010 009 471 U1 discloses a cutting tool which is held and adjusted by means of two wedge-shaped holder parts which can be moved relative to one another.

A large number of quick-change clamping systems for cutting tools are now available. The systems on the market, however, have the disadvantage that they can often only be used for certain types of machine and cannot be used independently of the machine. Or the systems are suitable for different types of machines, but only partially cannot be used on all types of machines due to a tightening screw with 90 ° lateral attachment. This in turn leads to increased costs and represents a barrier to market entry, since the costs for the end customer and the limited applicability cannot be shown as a convincing overall picture and therefore no clear benefit for the end customer. The quick-release change systems for cutting tools described in the prior art also require at least some of the use of specialist personnel. This in turn can lead to increased machine downtimes.

Object of the invention

The object of the present invention is to overcome the disadvantages of the prior art. In particular, a cutting tool is to be provided which can be quickly and easily released and fixed. In particular, a universal, machine-type-independent clamping system in combination with a quick-change holder is to be made available in order to be able to change tool sets without great effort and without specialist personnel.

Solution of the task

The features according to claims 1 and 2 lead to the solution of the object.

Advantageous embodiments are described in the subclaims.

A cutting tool according to the invention consists primarily of a basic tool holder and an interchangeable head. The basic tool holder comprises an insertion opening and a screw opening. The interchangeable head in turn comprises an insertion rod and a tool holder.

The insertion rod of the replaceable head can be inserted into the insertion opening of the basic tool holder. The shape and dimensions of the insertion opening are essentially matched to the shape and dimensions of the insertion rod. This means that the insertion rod can be inserted into the insertion opening in a defined shape and length. The interchangeable head can also be fixed or fixed to the basic tool holder by means of a screw element. For this purpose, a screw element is connected to the screw opening. This means in detail that the screw element has an external thread through which the screw element can be screwed into an internal thread of the screw opening.

In the exemplary embodiment according to the invention, the insertion rod has a recess. In a side view, it is a U-recess or a V-recess. This recess in turn forms an oblique stop.

In the context of this invention, the fixing position is present when the interchangeable head is introduced into the basic tool holder and is fixed in the basic tool holder by the screw element.

In the fixing position, the screw element is screwed into the screw opening until a cylinder tip of the screw element is screwed against the inclined stop and the replaceable head is pressed against the inner walls of the insertion opening of the basic tool holder.

The oblique stop is designed to be inclined away from the tool holder. A bevel of the bevel stop is designed to extend away from the replaceable head. In detail, this means that the incline is arranged closest to the interchangeable head in the area of a base of the recess and the distance to the interchangeable head increases further and further over the incline away from the base.

In a secondary exemplary embodiment, the insertion rod has a plane stop instead of the inclined stop. This in turn means that the plane stop runs essentially at right angles away from the bottom of the recess and thus the same distance from the interchangeable head or the tool holder is given over the entire extent of the plane stop. In In this secondary exemplary embodiment, the screw element has a cone tip. In the fixing position, the screw element with the cone tip is screwed into the screw opening until the cone tip hits the plane stop and fixes the insertion rod of the replaceable head in the insertion opening of the basic tool holder.

In a further secondary embodiment, the insertion rod also has the abovementioned oblique stop. In this subsidiary embodiment, the screw element has the cone tip. In the fixing position, the screw element with the cone tip is screwed into the screw opening until the cone tip hits the bevel stop and fixes the insertion rod of the replaceable head in the insertion opening of the basic tool holder.

The recess in the insertion rod forms a set-down edge, the bottom and the plane stop or the bevel stop, the plane stop or the bevel stop running away from the bottom at a right angle or an angle of over 90 °.

The tool holder includes a cutting tool. This can in particular be a chipper. The cutting tool or the chipper is a tool for the machining of workpieces. These can be metal workpieces, but non-metal materials such as e.g. Plastics, wood, ceramics or the like can be included.

The screw opening is arranged at an angle to the introduction opening. The angle is preferably less than 90 °, but can also be exactly 90 ° or even greater than 90 °. If the angle were 90 °, the screw opening would run perpendicular to the insertion opening. If the angle were greater than 90 °, the screw opening would be inclined away from an inlet opening of the insertion opening. In practice, an angle of less than 90 ° has proven to be the most effective. However, the other possibilities are intended to be encompassed by the present invention.

In a preferred exemplary embodiment, the screw opening is formed at a right angle to the inclined stop in the fixing position. This advantageously means that the insertion rod can be fixed in the recess quickly and easily.

The insertion opening can have different hollow profiles. In detail, it can be a circular profile, a corner profile or an oval profile, the insertion rod being designed with a positive fit to the insertion opening. In this context, positively locking means that the insertion rod can be pushed into the insertion opening without tilting.

The chipper can be placed in a tool recess, the chipper being received in the tool recess in such a way that there is sufficient support during the machining process. The chipper protrudes from the tool recess in a defined form in order to be able to machine the workpiece with appropriately predetermined cutting edges. The chipper is reversibly connected to the replaceable head by means of a fixation. The fixation is usually a tool screw.

The basic tool holder has a stop bevel in the area of the screw opening. In the fixing position, the screw opening has a stop bevel on the side facing away from the insertion rod. In detail, this means that in the fixation position the oblique stop is designed parallel to the stop bevel. Executed in parallel means that in the fixing position from the side view of the cutting tool, that is to say on the elongate extent of the cutting tool, the bevel stop and the bevel form two surfaces formed parallel to one another.

Figure list

• 1 eine teilweise Schnittansicht durch eines Zerspanungswerkzeug gemäss der vorliegenden Erfindung;
• 2 eine Seitenansicht eines Wechselkopfes für ein Zerspanungswerkzeug nach 1; und
• 3 ein Längsschnitt durch einen Werkzeuggrundhalter des Zerspanungswerkzeuges nach 1.

Further advantages, features and details of the invention emerge from the following description of preferred exemplary embodiments and with reference to the drawings; these show in:

• 1 a partial sectional view through a cutting tool according to the present invention;
• 2 a side view of an interchangeable head for a cutting tool according to 1 ; and
• 3 a longitudinal section through a basic tool holder of the cutting tool 1 .

Embodiment

In 1 is a cutting tool Z shown. The cutting tool Z includes a basic tool holder 1 and an interchangeable head 3 , which in turn has an insertion rod 2 and a tool holder 6th includes.

The basic tool holder 1 of the cutting tool Z has an insertion opening 10 as well as a screw opening 5 on which prefers an angle α have to each other. The angle α in the present case preferably has less than 90 °.

In the insertion opening 10 is an insertion rod 2 of the interchangeable head 3 can be introduced, the insertion opening 10 for this purpose, a circular profile, a corner profile or an oval profile can be formed, wherein the insertion rod 2 is carried out positively to the 10.

The insertion rod 2 is in the basic tool holder 1 or in the screw opening 5 by a screw element 4th fixable.

The insertion rod 2 has a recess for this purpose 7th with an oblique stop 8th on, the screw element in the fixing position 4th with a cylinder point through the screw opening 5 to the bevel stop 8th is screwed to fix it. Thus the interchangeable head 3 firmly in the basic tool holder 1 held.

The screw hole 5 is in the fixation position at a right angle β to the bevel stop 8th educated.

It is also conceivable here, however, that the screw element 4th has a cone tip, so that the recess 7th then with a plan stop 17th which in 2 is shown in dashed lines, is provided, so that it is ensured that the interchangeable head 3 safe and secure in the slot 10 is held. The screw element must be in the fixation position 4th with the cone tip through the screw opening 5 to the plan fence 17th can be screwed to fix the interchangeable head 3 firmly in the basic tool holder 1 to keep.

Of course, the inclined surface is conceivable 8th also for the cone tip of the screw element 4th to be brought into operative connection. There are no limits to the invention here.

The insertion rod 2 points next to the recess 7th a landing edge 15th and a floor 16 on. In the case of the sloping fence 8th is this from the tool holder 6th running inclined. In the case of the plan posting 17th this runs in contrast to the oblique stop 8th at a right angle γ from the ground 16 path.

The tool holder 6th has a cutting tool 9 , in particular a chipper. the chipper 9 in a tool recess 12 can be positively placed and with the interchangeable head 3 by means of a fixation 13 is reversibly connected.

The screw hole 5 points in the fixation position on the insertion rod 2 facing away a stop bevel 14th on. This stop surface 14th is in the fixation position parallel to the diagonal stop 8th educated.

• Der Werkzeuggrundhalter 1 wird mit einem Klemmschaft 18 in einer nicht näher gezeigten Spannvorrichtung einer Maschine befestigt und gegebenenfalls mit ebenfalls nicht näher gezeigten maschinenseitigen Kühlmittelleitungen verbunden. Der Wechselkopf 3 ist über den Einbringstab 2 in der Einschuböffnung 10 mit dem Werkzeuggrundhalter 1 verbunden.

Referring to the 1 to 3 explains the mode of operation of the cutting tool according to the invention Z as follows:

• The basic tool holder 1 comes with a clamp shaft 18th fastened in a clamping device, not shown in detail, of a machine and optionally connected to the machine-side coolant lines, also not shown in detail. The interchangeable head 3 is about the insertion rod 2 in the slot 10 with the basic tool holder 1 connected.

Should now another cutting tool 9 are used, the interchangeable head must 9 be replaced. In detail, this means that initially an external thread of the screw element, which is not visible in detail 4th from an internal thread 19th the screw opening 5 is unscrewed. This removes the cylinder tip or the cone tip of the screw element 4th from the bevel stop 8th or accordingly the cone tip of the screw element 4th from the plan 17th and the fixation of the interchangeable head 3 in the slot 10 dissolves.

Is the screw element 4th far enough out of the screw opening 5 unscrewed, the replaceable head can 3 or its insertion rod 2 from the slot 10 be pulled out.

A new interchangeable head 3 with another cutting tool 9 can now go back into the basic tool holder 1 can be used. The interchangeable head 3 by means of its insertion rod 2 into the slot 10 inserted. As soon as the insertion rod 2 completely in the slot 10 is added, the screw element 4th by means of its external thread into the internal thread 19th the screw opening 5 be screwed in.

As soon as the cylinder tip of the screw element 4th at the bevel stop 8th or accordingly the cone tip of the screw element 4th on the plan fence 17th or the bevel stop 8th strikes or the screw element 4th no further into the screw opening of the basic tool holder 1 can be screwed in is the interchangeable head 3 firmly in the tool holder 1 fixed. The cutting tool Z can be started up again.

Although only a preferred exemplary embodiment of the invention has been described and illustrated, it is obvious that numerous modifications can be added by those skilled in the art without departing from the spirit and scope of the invention.

List of reference symbols

1

Basic tool holder

2

Insertion rod

3

Interchangeable head

4th

Screw element

5

Screw opening

6th

Tool holder

7th

Recess

8th

Bevel stop

9

Machiners

10

Insertion opening

11

12

Tool recess

13

Fixation

14th

Stop bevel

15th

Drop edge

16

ground

17th

Plan stop

18th

Clamp shaft

19th

inner thread

Z

Cutting tool

α

angle

β

right angle

γ

right angle

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was 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.

Patent literature cited

• DE 202010009471 U1 [0002]

Claims (12)

Cutting tool with a basic tool holder (1), wherein an insertion rod (2) of an interchangeable head (3) can be inserted into an insertion opening (10) of the basic tool holder (1), the insertion rod (2) being inserted into the basic tool holder (1) by a screw element (4 ) is fixable, which can be effectively connected to a screw opening (5), characterized in that the interchangeable head (3) consists of the insertion rod (2) and a tool holder (6), the insertion rod (2) having a recess (7) with a Inclined stop (8), wherein in the fixing position the screw element (4) can be screwed with a cylinder tip through the screw opening (5) to the inclined stop (8) in a fixing manner. Cutting tool with a tool holder (1), wherein an insertion rod (2) of an interchangeable head (3) can be inserted into an insertion opening (10) of the basic tool holder (1), the insertion rod (2) being inserted into the basic tool holder (1) by a screw element (4 ) is fixable, which can be effectively connected to a screw opening (5), characterized in that the interchangeable head (3) consists of the insertion rod (2) and a tool holder (6), the insertion rod (2) having a recess (7) with a Has planar stop (17), wherein in the fixing position the screw element (4) can be screwed with a conical tip through the screw opening (5) to the planar stop (17) in a fixed manner. Cutting tool with a basic tool holder (1), wherein an insertion rod (2) of an interchangeable head (3) can be inserted into an insertion opening (10) of the basic tool holder (1), the insertion rod (2) being inserted into the basic tool holder (1) by a screw element (4 ) is fixable, which can be effectively connected to a screw opening (5), characterized in that the interchangeable head (3) consists of the insertion rod (2) and a tool holder (6), the insertion rod (2) having a recess (7) with a Inclined stop (8), wherein in the fixing position the screw element (4) can be screwed with a conical tip through the screw opening (5) to the inclined stop (8) in a fixing manner. Cutting tool according to one of the preceding claims, characterized in that the inclined stop (8) is designed to be inclined away from the tool holder (6). Cutting tool according to one of the preceding claims, characterized in that the recess (7) forms a set-off edge (15), a base (16) and the plane stop (17), the plane stop (17) being at a right angle (γ) from the Floor (16) runs away. Cutting tool according to one of the preceding claims, characterized in that the tool holder (6) has a cutting tool, in particular a chipper (9). Cutting tool according to one of the preceding claims, characterized in that the screw opening (5) is arranged at an angle (α) to the insertion opening (10). Cutting tool according to one of the preceding claims, characterized in that the screw opening (5) in the fixing position is formed at a right angle (β) to the inclined stop (8). Cutting tool according to one of the preceding claims, characterized in that the insertion opening (10) is a circular profile, a corner profile or an oval profile, the insertion rod (2) being designed with a positive fit to the insertion opening (10). Cutting tool according to one of the preceding claims, characterized in that the chipper (9) can be positively placed in a tool recess (12) and is reversibly connected to the interchangeable head (3) by means of a fixation (13). Cutting tool according to one of the preceding claims, characterized in that the screw opening (5) has a stop slope (14) in the fixing position on the side facing away from the insertion rod (2). Cutting tool after Claim 11 , characterized in that, in the fixing position, the inclined stop (8) is designed parallel to the stop bevel (14).

Images