DE202018106069U1 - Tool holders, in particular holders for taps - Google Patents

Abstract

Tool holder (20), in particular holder for taps, comprising at least one base body (1), which
a front body region (1a), a rear body region (1c) and a middle body region (1b) arranged between these two body regions (1a and 1c), wherein
the front body region (1a) and the rear body region (1c) each have a free end face (6 or 7), and wherein
the front body region (1a), the middle body region (1b) and the rear body region (1c) have a common body longitudinal axis (8) which respectively passes through the two end faces (6, 7) centrally, and wherein
at least a portion of the rear body portion (1c) is a substantially cylindrical clamping shaft (2) of the tool holder (20), which, at least partially, as a polygonal shaft (2a) is formed and
the front body portion (1a) has a tamper-releasable holding unit (9) disposed inwardly of the front surface (6) of the front body portion (1a) and concentric with the body longitudinal axis (8).

Description

The invention relates to a tool holder, in particular a holder for taps. This tool holder, ie the holder for taps finds particular application when positioning and holding a tap on machine tools.

Holders for taps, which colloquially are also called taps holder, are known in a variety.

For example, the US 3,553,753 A. a tap holder having a base body which can be held and supported at one end by a rotary drive member for rotating the base body about an axis concentric with the rotation axis of the rotary drive member, the other end of the base body forming a blind cylindrical one outwardly opening, outwardly directed ring terminating at its inner end in a non-circular bore which is concentric with the central axis of the counterbore. The counterbore and bore of the base body are adapted to receive the cylindrical shank portion or non-circular fitting end of a conventional tap, and the counterbore loosely receives the shank portion of the tap and includes axially spaced radially inwardly projecting sealing and centering rings can be brought into engagement with the shank portion of an associated tap. Further, the base body includes a vent passage connecting the exterior of the body with the bore and the countersunk hole inwardly of the innermost seal and centering means, and the inner end of the bore has an elastic body therein for engagement by the mating end of an associated tap wherein the vent means include one-way check valve means for preventing movement of air through said bore and counterbore.

The much younger US 2009 0209356 A1 also discloses a tap holder designed for automatic tool changing on machine tools, in particular on machining centers. This tap holder has a tap body and a tap sleeve which can be inserted into a portion of the tap body such that the tap body and the tap sleeve partially overlap. With a locking element arranged transversely to the system axis, the tap sleeve is releasably secured to the tap body. In this case, in the axial direction on both sides of the locking element, an elastic element, which is in operative connection with the tapping sleeve and the tap body. With this type, a possibly occurring error in the synchronization of the spindle feed and rotation of a tap body and a tap chuck of a tap to be eliminated in accordance with a machine tool spindle or reduced in size at least.

These known types of tap holders are expensive to manufacture, so costly, and only partially variable usable.

Therefore, the object of the invention is to provide a tool holder, in particular a holder for taps, whose production is cheaper and which is much more variable usable. A secondary task is that the new tap holder can be used to form a modular tool holder kit.

The object is achieved with a tool holder of the first type with the features of claim 1 and / or with a tool holder of the second type with the features of claim 12.

The dependent claims 2 to 11 and 13 to 16 show further embodiments of the invention.

With the present invention, a tool holder, in particular a holder for taps, ie a tap holder is provided with which the mentioned disadvantages of known solutions are at least minimized. For this purpose, with the tool holder of the second type, which has at least the features of claim 12, a basic recording with machine-side interface, such as SK-DIN 69871 or HSK-DIN 69873 or similar standardized interfaces created, which tool side now also has a quick coupler coupling.

When using the tool holder of the first kind and the tool holder of the second type in a tool holder kit, the user receives a modular design tool holder in the form of a holder for taps, which either either machine side or tool side or both sides, ie machine and tool side, a quick change unit (quick coupler Clutch).

According to a further aspect of the invention, a basic receptacle is created for each common receiving bore of machine spindles of machine tools, the Machine-side body region is designed accordingly, for example in execution of the DIN 69873 , or after the ISO 6339 , or after the DIN 69880 , or after the DIN 69893 or similar standards.

The tool holder of the first type according to the invention has at least one main body which has a front body region, a rear body region and a middle body region arranged between these two body regions. The front body region and the rear body region each have a free end face. In addition, the front body region, the middle body region and the rear body region have a common body longitudinal axis, which in each case passes through the two end faces centrally, that is, passes through.

Furthermore, at least a portion of the rear body portion is a substantially cylindrical clamping shaft of the tool holder of the first kind, which, at least partially non-circular, is preferably formed as a polygonal shaft.

The front body portion of the main body has a receiving unit for releasably holding a tap, which is directed inwardly from the face of the front body portion of the body and arranged concentrically to the body longitudinal axis.

This receiving unit is according to a preferred embodiment, a quick change unit. The receiving unit also includes an anti-rotation device with which a recorded and held tap is secured against rotation during tapping.

The rotation can be part of the quick-change unit according to the invention or a separate element of the receiving unit.

According to a further embodiment, the receiving unit itself is interchangeable arranged in the front body region of the body.

With the tool holder of the first type according to the invention quasi a tap holder is provided which on one side, so machine side has a receiving shaft such as a tap according to standard, which is often called also clamping shank, and on the opposite side, so tool has a tap recording in execution of a quick coupler coupling in which taps are exchangeable within seconds.

According to another aspect of the invention, the new tap holder, the tool holder of the first kind, is manufactured in several "nominal sizes" and made available to the user as a modular tool holder kit. Here, the grading of the "nominal size" on the clamping shaft done and the tap record has always the same "nominal size" or the "nominal size" on the clamping shaft remains constant and the "nominal size" of the tap record, so the inclusion in the quick change unit is stepped.

Thus, e.g. for the transmission of relatively large amounts of torque, the "nominal size" on the clamping shaft are chosen to be large, while the "nominal size" of the tap receiver in the quick-change unit is smaller in magnitude; e.g. because the dimensions of the inner contours of the workpiece in which a threaded bore is to be made, a use of a tap holder with the same nominal size as on the clamping shaft and as in the tap recording not possible.

• - die Aufnahmeeinheit für das lösbare Halten eines Vielkantschafts eines Gewindebohrers ausgebildet ist, welcher einen n-Kantschaft mit einem ungeraden Vielfachen hat, vorzugsweise einen 3-Kantschaft; oder
• - die Aufnahmeeinheit für das lösbare Halten eines Vielkantschafts eines Gewindebohrers ausgebildet ist, welcher einen 4-Kantschaft oder einen 6-Kantschaft hat; oder
• - die Mantelfläche oder ein Abschnitt der Mantelfläche des mittleren Körperbereichs des Grundkörpers eine Grifffläche ist, welche bevorzugt ein Rändel- oder ein Kordelmuster aufweist.

According to further embodiments of the invention, it is provided that

• - The receiving unit is designed for releasably holding a polygonal shaft of a tap, which has an n-cantilever shaft with an odd multiple, preferably a 3-edge shaft; or
• - The receiving unit is designed for releasably holding a polygonal shaft of a tap, which has a 4-edge shank or a 6-Kantschaft; or
• - The lateral surface or a portion of the lateral surface of the central body portion of the base body is a gripping surface, which preferably has a knurled or a cord pattern.

The present invention also relates to a variant of a tool holder of the first type, in which the receiving unit is designed for releasably holding a tap and / or a cutting iron.

The present invention further relates to a variant of a tool holder, which consists of at least two tool holders of the first type, which, stuck together, so to speak partially inserted into each other, are detachably connected to each other, that optionally an extension adapter is formed, which here as Tool holder third type is designated.

Furthermore, the present invention also relates to a variant of a tool holder which has already been referred to earlier in the application as a tool holder of the second type. This tool holder is, based on his Intended use refers to a basic recording in the form of a tool interface.

This basic receptacle has a main body, which likewise has a front body region, a rear body region and a middle body region arranged between these two body regions. The front body region, which is provided on the tool side, and the rear body region, which is provided on the machine side, each have a free end face. The front body region, the middle body region and the rear body region also have a common body longitudinal axis, which in each case runs through the two end faces centrically.

In addition, a substantially conical clamping shaft is arranged at least at a portion of the rear body portion.

It is further provided that the front body portion of the body for releasably holding a tap has a receiving unit, which is directed inwardly from the end face of the body front body and arranged concentrically to the body longitudinal axis.

According to embodiments of the invention, this tool holder of the second kind, ie this basic receptacle in the form of a steep taper interface (SK) or in the form of a hollow shaft taper interface (HSK) or in the form of a capto-interface (capto) or as a Morse taper interface (MK) is formed.

The receiving unit of this tool holder of the second type according to the invention also has a quick-change unit together with an anti-rotation device.

Also in this embodiment, the receiving unit may be designed for releasably holding a cutting iron, and preferably have a quick-change unit.

• - die Verdrehsicherung Bestandteil der Schnellwechseleinheit oder ein separates Element der Aufnahmeeinheit; oder
• - die Aufnahmeeinheit ist selbst auswechselbar im vorderen Körperbereich des Grundkörpers angeordnet.

According to further embodiments of the tool holder of the second kind is:

• - The anti-rotation part of the quick-change unit or a separate element of the receiving unit; or
• - The receiving unit is itself interchangeable arranged in the front body region of the body.

• - für das lösbare Halten eines Vielkantschafts eines Gewindebohrers oder eines Vielkantschafts eines Werkzeughalters erster Art ausgebildet ist, welcher einen n-Kantschaft mit einem ungeraden Vielfachen hat, vorzugsweise einen 3-Kantschaft; oder
• - für das lösbare Halten eines Vielkantschafts eines Gewindebohrers oder eines Vielkantschafts eines Werkzeughalters erster Art ausgebildet ist, welcher einen 4-Kantschaft oder einen 6-Kantschaft hat;

According to further embodiments, it is provided that the receiving unit of the tool holder of the second type:

• - Is designed for the releasable holding a polygonal shaft of a tap or a polygonal shaft of a tool holder of the first kind, which has an n-cantilever shaft with an odd multiple, preferably a 3-edge shaft; or
• - Is designed for releasably holding a polygonal shaft of a tap or a polygonal shaft of a tool holder of the first kind, which has a 4-edge shank or a 6-edge shank;

Advantages of the invention include, inter alia, that taps can be clamped directly in seconds. In addition, a tap holder, if necessary, be extended without complicated handling quickly to the required length.

The novel tool holder of the second type also allows a reduction of the usual length of a tap holder. The "nominal size" of the receptacle of the quick-change unit is designed according to the size of the tap shank. Since on the opposite side of the tap holder, so the machine side, a clamping shaft is mounted as in a tap, the invention allows a very slim design. Through this new design of a tap holder thread cutting in deeper areas of the workpiece or close to the edge of the workpiece can be carried out process-reliable. The supply of coolants and lubricants is easy to implement.

For economical production of the new tap holder, so the tool holder of the first kind and second type, the size of the receiving shaft, so the clamping shaft, reduced to a few sizes. The tool-side arranged, preferably interchangeable quick-change unit is designed according to the size of the tap shank of the respective tap.

The shank, so the clamping shaft of the tap holder is the Standard DIN 352-7374 , the norm DIN 376 or the norm DIN 5157 customized.

With the invention, as already mentioned above, it is possible to provide a modular tool holder kit of tap holders, so that tap holders can be loaded into all receptacles of each manufacturer of tap holders.

• 1 einen Werkzeughalter erster Art, in Form eines relativ schlanken Gewindebohrerhalters;
• 2 einen Werkzeughalter zweiter Art, in Ausbildung einer Grundaufnahme in Form einer Werkzeugschnittstelle und
• 3 einen Werkzeughalter dritter Art, in Form eines Verlängerungs-Adapters.

The invention will be described in greater detail below with reference to exemplary embodiments shown schematically in the drawings and in further details explained, however, which do not limit the invention. Show it:

• 1 a tool holder of the first kind, in the form of a relatively slim tap holder;
• 2 a tool holder of the second kind, in training a basic recording in the form of a tool interface and
• 3 a tool holder of the third kind, in the form of an extension adapter.

First of all, it is anticipated that terms such as "left," "right," "top," or "bottom," front and back refer only to the representation in the figures, but may differ from the actual arrangement in practice. It should also be noted that the figures are not purely technical drawings, which is why partial hatching and demolition lines are missing. In addition, the relative dimensions may differ from reality. In the description, not mentioned reference numerals result from the list of reference numerals with the associated technical feature. The reference numbers have the same meaning in all figures.

In the 1 is a tool holder of the first kind 20 shown, which has the form of a relatively slim holder for taps. This tool holder 20 has a basic body 1 , In the axial direction of this body is 1 along its body longitudinal axis 8th in a front body area 1a , a rear body area 1c and one between these two parts of the body 1a and 1c arranged middle body area 1b divided, these three body areas 1a . 1b . 1c are integrally connected to each other in the embodiment shown here.

The front body area 1a and the back body area 1c each have a free end face 6 respectively. 7 , which are arranged so that the common body longitudinal axis 8th the two end faces 6 and 7 runs through each centric.

A section of the back of the body 1c , which is usually used arranged on the machine side, is a substantially cylindrical clamping shaft 2 of the tool holder 20 , This span shaft 2 is, at least in part, as Vielenkantschaft 2a educated; in the embodiment shown as 4-Kantschaft.

The front part of the body, which is usually used on the tool side 1a has a receiving unit 9 for releasably holding a tap, which from the end face 6 of the front body area 1a out of the body inwards and concentric with the body's longitudinal axis 8th is arranged.

The recording unit 9 has a quick-change unit for releasably holding a polygonal shaft of a tap 3 together with an anti-twist device 5 , With the reference number 4 is a movable inner part of the quick-change unit 3 marked.

According to this embodiment 1 is the recording unit 9 also replaceable in the front body area 1a arranged; wherein the means for this purpose are known guide and locking elements. The anti-twist device 5 is here preferably an element of the receiving unit 9 and essentially structurally independent of the quick change unit 3 ,

The 2 shows a tool holder of the second kind, in training a basic recording 30 in the form of a tool interface, namely a steep taper interface SK.

This tool holder of the second type has a base body 10 , which in the axial direction along its body longitudinal axis 18 arranged a front body area 10a , a rear body area 10c and one between these two parts of the body 10a and 10c arranged middle body area 10b having. These body areas 10a . 10b and 10c are preferably integrally connected to each other. The front body area 10a , which is provided on the tool side, and the rear body portion 10c , which is provided on the machine side, each have a free end face 16 respectively. 17 on, which are arranged so that the common body longitudinal axis 18 in each case centrally through these end faces 16 . 17 passes.

In this basic recording 30 is at least a portion of the posterior body area 10c a substantially cone-shaped clamping shank 13 , which is designed as a steep cone.

The front body area 10a this basic shot 30 has a receiving unit 11 for releasably holding a tap, which from the end face 16 of the front body area 10a out of the body inwards and concentric with the body's longitudinal axis 18 is arranged.

The middle part of the body 10b is here as a cylindrical collar 14 formed, which has a circumferential groove into which, for example, a gripper of an automatic tool change unit can intervene temporarily.

The recording unit 11 This tool holder of the second kind has a quick-change unit for detachably holding a polygonal shaft of a tap or detachably holding a polygonal shaft of a tool holder of the first type 12 together with an anti-twist device 11a ,

According to this embodiment 2 is the recording unit 11 also replaceable in the front body area 10a arranged; wherein the means for this purpose are known guide and locking elements. The anti-twist device 11a is also here preferably an element of the receiving unit 11 and essentially structurally independent of the quick change unit 12 ,

In the 3 is an inventive tool holder third type, an extension adapter 40 shown which of two tool holders of the first kind 20 is formed. The span shaft 2 the second, the right tool holder 20 is for this purpose in the receiving unit 9 the first, the left tool holder 20 introduced and with its quick change unit 3 in his position to the body length 8th positioned. The polyvalent shaft 2a of the right tool holder is in the anti-twist device 5 of the left tool holder.

When using one or more other tool holder of the first kind 20 can the extension adapter 40 be further extended as required.

The content of the invention also includes that an extension adapter with a tool holder of the first kind 20 and a tool holder of the second kind 30 can be formed. When using one or more other tool holder of the first kind 20 Such an extension adapter can also be further extended.

All mentioned in the foregoing description as well as the only removable from the drawing features are further components of the invention, even if they are not particularly highlighted and in particular not mentioned in the claims.

LIST OF REFERENCE NUMBERS

1

body

1a

front body area (from pos.1)

1b

middle body area (from pos.1)

1c

rear body area (from pos.1)

2

clamping shaft

2a

Polygonal shaft

3

Quick change unit (quick change coupler)

4

movable inner part

5

Anti-rotation lock (for Pos.2a)

6

End face (from pos. 1a)

7

End face (from pos. 1c)

8th

Body longitudinal axis (from pos.1)

9

Recording unit (in pos. 1a)

10

body

10a

front body area (from pos.10)

10b

middle body area (from pos. 10)

10c

rear body area (from pos. 10)

11

recording unit

11a

twist

12

Quick-change unit

13

cone-shaped clamping shaft

14

Collar / cylinder / gripping cylinder

15

-free -

16

End face (from pos. 10a)

17

End face (from pos. 10c)

18

Body longitudinal axis (from Pos.10)

19

- free -

20

Tool holder of the first kind

30

Tool holder of the second kind (basic fixture)

40

Tool holder third type (extension adapter)

50

Taps, with polygonal shaft

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

• US 3553753 A [0003]
• US 20090209356 A1 [0004]

Cited non-patent literature

• SK-DIN 69871 [0009]
• HSK-DIN 69873 [0009]
• DIN 69873 [0011]
• ISO 6339 [0011]
• DIN 69880 [0011]
• DIN 69893 [0011]
• Standard DIN 352-7374 [0036]
• DIN 376 [0036]
• DIN 5157 [0036]

Claims (16)

Tool holder (20), in particular holder for taps, comprising at least one base body (1), which a front body region (1a), a rear body region (1c) and a middle body region (1b) arranged between these two body regions (1a and 1c), wherein the front body region (1a) and the rear body region (1c) each have a free end face (6 or 7), and wherein the front body region (1a), the middle body region (1b) and the rear body region (1c) have a common body longitudinal axis (8) which respectively passes through the two end faces (6, 7) centrally, and wherein at least a portion of the rear body portion (1c) is a substantially cylindrical clamping shaft (2) of the tool holder (20), which, at least partially, as a polygonal shaft (2a) is formed and the front body portion (1a) has a tamper-releasable holding unit (9) disposed inwardly of the front surface (6) of the front body portion (1a) and concentric with the body longitudinal axis (8). Tool holder (20) after Claim 1 , characterized in that the receiving unit (9) for releasably holding a polygonal shaft of a tap has a quick-change unit (3) together with an anti-rotation device (5). Tool holder (20) after Claim 1 or 2 , characterized in that the receiving unit (9) interchangeable in the front body portion (1a) is arranged. Tool holder (20) after Claim 1 , characterized in that the receiving unit (9) is designed for releasably holding a tap and / or a cutting iron. Tool holder (20) after Claim 1 . 2 . 3 , or 4, characterized in that the receiving unit (9) is designed for releasably holding a polygonal shaft of a tap, which has an n-edge shaft with an odd multiple. Tool holder (20) after Claim 5 , characterized in that the receiving unit (9) is designed for releasably holding a polygonal shaft of a tap, which has a 3-Kantschaft. Tool holder (20) after Claim 1 . 2 . 3 , or 4, characterized in that the receiving unit (9) is designed for releasably holding a polygonal shaft of a tap, which has a 4-edge shaft. Tool holder (20) after Claim 1 . 2 . 3 , or 4, characterized in that the receiving unit (9) is designed for releasably holding a polygonal shaft of the tap, which has a hexagonal shank. Tool holder (20) after Claim 1 . 2 . 3 . 4 . 5 . 6 . 7 or 8th , characterized in that the lateral surface or a portion of the lateral surface of the central body region (1b) of the base body (1) is a gripping surface. Tool holder (20) after Claim 9 , characterized in that the gripping surface has a knurled or a cord pattern. Tool holder consisting of at least two tool holders (20) according to at least one of Claims 1 to 10 , which, connected to each other (3, 2, 2a) are detachably connected to each other so that optionally an extension adapter (40) is formed. Tool holder (30), in particular holder for taps, comprising a main body (10) which has a front body region (10a), a rear body region (10c) and a middle body region (10b) arranged between these two body regions (10a and 10c), wherein the front body portion (10a) provided on the tool side and the rear body portion (10c) provided on the machine side each have a free end surface (16 or 17), and wherein the front body portion (10a) is the middle body portion (10b) and the rear body region (10c) have a common body longitudinal axis (18), which in each case passes centrally through the two end faces (16, 17), and wherein at least a portion of the rear body region (10c) has a substantially conical clamping shank (13). and wherein the front body portion (10a) has a receiving unit (11) for releasably holding a tap welc is directed inwardly from the end face (16) of the front body region (10a) and concentric with the body longitudinal axis (18). Tool holder after Claim 12 , characterized by its construction as a basic receptacle (30) in the form of a tool interface. Tool holder after Claim 13 , characterized in that the basic receptacle (30) is a steep taper interface (SK), a hollow shaft taper interface (HSK), a Capto interface (Capto) or a Morse taper interface (MK). Tool holder after Claim 12 . 13 or 14 , characterized in that the receiving unit (11) for releasably holding the polygonal shaft of a tap has a quick-change unit (12) together with an anti-rotation device (11a). Tool holder after Claim 12 . 13 or 14 , characterized in that the receiving unit (11) is designed for releasably holding a cutting iron, and preferably has a quick-change unit.

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