WO2014183742A2

WO2014183742A2 - System tool and tool for machining

Info

Publication number: WO2014183742A2
Application number: PCT/DE2014/000248
Authority: WO
Inventors: Florian KNORR
Original assignee: Gühring KG
Priority date: 2013-05-15
Filing date: 2014-05-14
Publication date: 2014-11-20
Also published as: DE102013105015A1; WO2014183742A3; EP2996829A2

Abstract

The invention relates to a system tool (50) and a tool (50) for the rotational machining of a workpiece and for connecting to a cooling lubricant supply, comprising a plurality of cutting elements, which are arranged at an offset from each other in an axial and/or radial direction of the tool or tool system and which can be divided into at least two cutting groups depending on the function of the cutting elements, a feed-in point (34) for feeding in a cooling lubricant, and an inner cooling lubricant channel system for distributing the cooling lubricant from the feed-in point to each cutting element. The first and second cutting groups (64, 74) are assigned first and second lead-off or branching points (68, 78), respectively, for leading off cooling lubricant from the cooling lubricant channel system. A connection channel of a first or second type (70a, 70b, 80a, 80b) is associated with each cutting element of the first and second cutting groups, respectively, which connection channel establishes fluid communication from the first and second lead-off or branching points (68, 78), respectively, to the respective cutting element. Thus, a supply path of a first or second type is formed for each cutting element of the first and second cutting groups (64, 74), respectively, which supply path establishes fluid communication from the feed-in point (34) via the first or second lead-off or branching point (68, 78), through the connection channel of the first or second type (70a, 70b) associated with the respective cutting element. The designs of the supply paths of the first type and the designs of the supply paths of the second type are selected in such a way that the response time of the supply of the cutting elements of the first cutting group (64) and the response time of the supply of the cutting elements of the second cutting group (74) with cooling lubricant are matched as closely to each other as possible. The designs of the supply paths of the first and second types can be selected in such a way that, of the supply rate of the cooling lubricant provided from the cooling lubricant supply via the feed-in point (34), a predetermined first partial supply rate and a predetermined second partial supply rate of the cooling lubricant are conducted to the first and second cutting groups (64, 74), respectively.

Description

description

System tool and tool for machining

The invention relates to a system tool and a tool, such as e.g. a multi-stage tool, for machining a workpiece, with a plurality of cutting groups, which have different functions and each having at least one cutting element and which are arranged offset to each other in the axial and / or radial direction, and with an internal cooling and lubricant channel system, which is used to supply Cutting elements with coolant and lubricant is used, which is supplied to the cutting elements during operation of a cooling and lubricant preparation.

In conventional machining of materials, the coolant and lubricants perform three important tasks, namely, cooling, lubricating, and removing chips generated from the cutting zone. For some time, processing with so-called minimum quantity lubrication (MQL) has become established as an alternative to conventional material processing. In the process, fine oil droplets are atomized in air, so that an oil-air mixture in the form of an aerosol is produced. The quasi-dry processing with MQL increases the energy and resource efficiency by eliminating the disposal costs for the cooling lubricant and the elimination of the chip drying. However, in order to ensure that material removal with MQL is sufficiently efficient in removing chips and achieving a good cooling effect, a sufficiently high supply pressure of the lubricating medium must be provided.

It has been shown that, in particular when the cutters or cutting groups to be supplied are spaced radially and / or axially relatively far apart, there is often a cutting or tool breakage, in particular when the cutters simultaneously come into operation, like that eg in a step-drilling tool is the case.

| Confirmation copy | WO 2009/059576 A2 discloses an above-outlined shank tool having a first shank part on which a first cutting head equipped with a first cutting head is formed, and a substantially cylindrical recess in the first shank part, in which in the axis of rotation of the first shank part, a second shank part is arranged, on which in turn is provided with a second cutting group equipped second cutting head. The diameter of the first cutting part is adjustable by means of an adjusting screw arranged on the front face. The second shaft part is completely penetrated in its length by a cooling channel with a cooling channel section running along the shaft and a cooling channel section arranged obliquely outwards from the axis of the second shaft part and having an outlet in the region of the cutting edges of the second cutting head. At the level of an annular recess formed around the cylindrical recess in the wall of the cylindrical recess, a cross-connection to the recess is provided, from which connection channels are formed to outlets in the region of the cutting edges of the first cutting head. The screwed in the front end screw adjusting screw has a central bore, with cross-connections to a franking on the second shaft portion, lead from the oblique stub lines to each blade of the second cutting group.

In such a tool, the above-mentioned spontaneous fractures can not be excluded.

Disclosure of the invention

The invention has for its object to provide a system tool and a tool having a plurality of (at least two) axially and / or radially staggered cutting edges or cutting groups, by a in (system) tool internal cooling and lubricant channel system be supplied with coolant and lubricant, in which the risk of the occurrence of cutting and / or tool breakages is substantially reduced. This object is achieved according to a first aspect of the invention by a system tool having the features of independent patent claim 1, and according to a second aspect of the invention by a tool having the features of independent claim 13.

In the name of the Applicant carried out studies on rotating tools with several axially and / or radially staggered arranged cutting groups, especially on multi-stage tools arranged on the stages Senkschneiden- and reaming blade groups and arranged at the front end of the tool drilling or Zentrierschneiden, have shown that unforeseen cutting and / or Werkzeug.brüche are due to the fact that the supply sub-rates of arranged at different positions in the system tool cutting groups distributed unevenly and not due to a function or a Abtragsrate or cutting edge size of cutting a cutting group required supply requirements. Accordingly, cutting edges are different and, above all, supplied at different times with full cooling / lubrication, which may already be sufficient in particular during the starting process of the tool to lead to a (local) overuse of the tool and / or certain cutting, and that the response times of different Cutting groups are different from each other.

Accordingly, according to the first aspect of the invention, there is provided, for example, a rotationally driven system tool designed as a shank tool, for machining a workpiece, for coupling to a machine tool, with a stationary or rotating tool holder, and for connection to a coolant and lubricant supply. The system tool comprises a first cutting group having at least one cutting element of the first type and a second cutting group having at least one cutting element of the second type, wherein each cutting element of the second type is offset relative to each cutting element of the first type in an axial and / or radial direction of the system tool Feed point for feeding a feedable coolant and lubricant, a coolant and lubricant channel system formed within the system tool for distributing the coolant and lubricant from the feed point to each cutting element The channel system comprises a first branching or branching point assigned to the first cutting group for branching off coolant and lubricant from the cooling and lubricant channel system, and for each cutting element of the first type, a connecting channel of the first type associated therewith produces fluid communication from the first branch point to this cutting element. Thus, for each cutting element of the first kind, a supply path of the first type is formed which produces fluid communication from the feed point via the first branch or branch point through the connecting channel of the first type (70a, 70b) assigned to this cutting element. The channel system further comprises a second branching or branching point associated with the second cutting group and, for each cutting element of the second type, a connecting channel of the second type associated therewith, which establishes fluid communication from the second branching point to this cutting element. Thus, for each cutting element of the second type, a supply path of the second type is formed, which produces fluid communication from the feed point via the second branch or branch point through the connecting channel of the second type assigned to this cutting element.

According to the invention, the constructive configurations of the supply paths of the first kind and the constructive configurations of the supply paths of the second type are selected or configured such that the response time of the supply of the cutting elements of the first type and the response time of the supply of the cutting elements of the second type with coolant and lubricant, ie Response times of the first and the second cutting group are substantially equal to each other. Here, parameters of the structural design of a supply path, for example, the length and the flow cross-section of flow channels or Vorlaufkanalabschnit- th, the length and the flow cross-section of a respective cutting element associated connection channel, and a branch share of a respective connection channel at a branch or branch point comprise. The branching parts referred to herein may be provided by providing or not providing fluidically advantageous baffles and / or by fluidly advantageous embodiments of the coalescing channel inner wall surfaces and / or flow slowing elements such as corners or edges, and / or in particular by selecting the branch angles referred to herein the respective connection Channel first or second type of a respective main channel in which the respective branch or branch point is arranged, influenced or adjusted, ie, depending on the need (adjustment of response times) and / or supply needs of the cutting, be increased or decreased. A basic idea of the present invention is, through targeted structural design of the different supply paths, in particular by a targeted selection of the aforementioned parameters, the duration of the coolant and lubricant, such as the aerosol, especially in the minimum quantity lubrication, along the different supply paths of the a feed point on the different and geometrically different supply paths to the different cutting edges or cutting groups, and thus also the response times, if possible, in particular, in essence, to match each other. This can be achieved that the cooling and

When the coolant and lubricant supply for the system tool is switched on, lubricant almost or substantially simultaneously arrives at the beginning of a machining process at the various cutting edges or cutting groups.

According to the second aspect of the invention, there is provided, for example, a rotationally driven shaft tool for machining a workpiece and for connection to a coolant and lubricant supply via a transfer section which forms a supply point of coolant and lubricant in this tool. The tool comprises a first cutting group having at least one cutting element of the first kind and a second cutting group having at least one cutting element of the second type, wherein each cutting element of the second kind is offset with respect to each cutting element of the first kind in an axial and / or radial direction of the tool. The tool further includes a coolant and lubricant channel system formed within the tool for distributing the coolant and lubricant from the feed point to each first and second cutting element. The coolant and lubricant channel system includes a first branch point associated with the first cutting group Branching coolant and lubricant from the cooling and lubricating channel system, and for each cutting element of the first kind, a first associated therewith connecting channel, which produces a fluid communication from the first branch or branch point to this cutting element, so that for each cutting element of the first kind a supplier is formed path of the first type, which produces a fluid communication from the feed point via the first branch or branch point by this cutting element associated connection channel of the first kind. The coolant and lubricant channel system further comprises a second branch or branch point associated with the second cutting group, and for each cutting element of the second type, a second type of connection channel associated therewith, which establishes fluid communication from the second branching point to this cutting element. so that a supply path of the second type is formed for each cutting element of the second type, which produces fluid communication from the feed point via the second branch or branch point through the connecting channel of the second type assigned to this cutting element.

According to the invention, the constructive configurations of the supply paths of the first type and the constructive configurations of the supply paths of the second type are selected or configured such that the response times of the supply of the cutting elements of the first type and of the cutting elements of the second type with coolant and lubricant are substantially equal to one another. Analogous to the system tool according to the first aspect and according to the same basic idea of the invention, also in the tool according to the second aspect of the invention, the parameters of the structural design of a supply path, for example, a length and a flow cross-section, in particular a diameter, a flow channel or flow channel section , a length and a flow cross-section, in particular a diameter, of a respective connecting element associated with a cutting element, and a branch portion of a respective connection channel at a branch or branch point (and analogous parameters for a second or even further supply paths). As a result, when the coolant and lubricant supply for the tool is switched on, the coolant and lubricant at the beginning of a machining operation reaches the various cutting edges or cutting groups almost or substantially simultaneously.

The invention is equally applicable for the single-channel and for the two-channel technology of minimal quantity lubrication, wherein in the latter technology, the mixing process for the aerosol is performed directly in the spindle Further advantages of the invention

In the system tool according to the first aspect of the invention, the supply of the coolant and lubricant can be made from a central coolant and lubricant supply, and it can be guided through the mechanical coupling.

The system tool according to the first aspect of the invention can comprise a tool holder rotatably connected to a rotatable drive coupling of the machine tool and a tool rotatably connectable to the tool holder. In this case, the tool may comprise a shank portion, which is at least partially receivable in the tool holder, and a working portion. The feed point may be arranged in a provided for coupling with the drive coupling of the machine tool coupling portion of the tool holder. The coolant and lubricant channel system may include a transfer section for transferring coolant and lubricant from the tool holder to the tool and a central channel that establishes fluid communication from the feed point to the transfer section. In this case, the first cutting group and each connecting channel of the first kind can now be arranged in the tool, and the second cutting group, the second branching point and each connecting channel of the second type can be arranged in the tool holder, and furthermore the second branching point or branching point or in fluid communication with the central channel.

In a first embodiment of this system tool, the first branch point may be located downstream of the transfer section and in the tool, a first flow channel may establish fluid communication from the transfer section to the first branch point. In this case, the constructive embodiments of the central channel in its section from the second branch or branch point to the transfer section, the transfer section, the first flow channel, the first branch or branch point and the connection channels of the first type in relation to the constructive embodiments of the second Branch or branch point and the Connection channels of the second type to be coordinated so that the response times of the supply of the cutting elements of the first kind and the supply of the cutting elements of the second kind with the coolant and lubricant as far as possible, in particular substantially, are aligned with each other. An advantage of this embodiment is that in the tool of the rear end, at the transfer point, initially only one channel, the first flow channel is formed, which affects the strength of the tool in the traversed by the flow channel section only insignificantly. Only downstream, ie further in front of the tool, approximately in the vicinity of the cutting elements, the branching or branching point is arranged, run from the plurality of connection channels, so that only in this section can affect the strength of the tool.

In an alternative, second embodiment of this system tool, the first branch or branch point can be arranged at a rear end portion of the tool and be coupled to the transfer section. In this case, the constructive configurations of the central channel in its section from the second branch or branch point to the transfer section, the first branch or branch point and the connection channels of the first type with respect to the constructive embodiments of the second branch or branch point and the Connection channels of the second type to be coordinated so that the response times of the supply of the cutting elements of the first kind and the supply of the cutting elements of the second kind with the coolant and lubricant as far as possible, in particular substantially, are aligned with each other. In this embodiment, the cutting edges of the first cutting group can be supplied individually with coolant and lubricant via connection channels already beginning at the rear end of the tool at the transfer section.

In the first and second embodiments, the said adjustments in the constructive configurations of the supply paths can cause the coolant and lubricant when switching on the coolant and lubricant supply in the tool, for example, within the tool system further forward cutting edges of the first cutting group, which eg geometrically longer supply paths are assigned, arrives essentially at the same time as in the factory tool holder, eg within the tool system further back arranged cutting edges of the second cutting group, which, for example, geometrically shorter supply paths are assigned.

In the first and the second embodiment of this system tool consisting of the tool holder and the tool, the parameters of the constructional configuration of the first supply paths may include the length and the flow cross section, in particular diameter, of the section of the central channel from the second branch point up to the transfer section, the length and the flow cross-section, in particular diameter, of a respective connection channel of the first kind, a branch portion, in particular a branch angle, of a respective connection channel of the first kind at the first branch. Branching point, and the length and the flow cross-section, in particular diameter, the first flow channel, if any. The parameters of the design configuration of the second supply paths may include the following: the length and the flow cross section, in particular diameter, of a respective connection channel of the second type, and a branch portion, in particular a branch angle, of a respective connection channel of the second type at the second branch or branch point. As already mentioned, the branching parts can be provided by providing or not providing flow-mechanically advantageous guide surfaces and / or by flow-mechanically advantageous embodiments of the coming channel inner wall surfaces and / or slowing down by the flow elements, such as corners or edges, and / or in particular by choosing the so-called Branch angle of the respective connection channel first and second type of a respective main channel in which the respective branch or branch point is arranged, influenced or adjusted (increased or decreased).

As an alternative to the first and second embodiments, the system tool may comprise a tool holder rotatably connected to a rotatable drive coupling of the machine tool and a tool that can be connected to the tool holder in a rotationally fixed manner. In particular, the tool may comprise a shank portion, which is at least partially receivable in the tool holder, and a working portion. The feed-in point can be connected in one for coupling with the be arranged drive clutch of the machine tool provided coupling portion of the tool holder. The coolant and lubricant passage system may include an overflow section for passing coolant and lubricant from the tool holder to the tool and a center channel that establishes fluid communication from the feed point to the transfer section. Here can now the first

Cutting group, the first branch and Verweigungsstelle and each connection channel of the first kind arranged in the tool, and the second cutting group, the second branch point and each connection channel of the second kind can also be arranged in the tool.

In a third embodiment of this system tool, the second branch point may now be located downstream with respect to the transfer section, and a second flow channel may establish fluid communication from the transfer section to the second branch point. Further, the first branch point may be located downstream relative to the second branch point, and a first flow channel may establish fluid communication from the second branch point to the first branch point. Here, the structural configurations of the first flow channel, the first branch or branch point and the connection channels of the first type in relation to the structural configurations of the second branch or branch point and the connection channels of the second type are coordinated so that the response times of the supply the cutting elements of the first type and the cutting elements of the second kind, ie the first and the second cutting group, with the coolant and lubricant as far as possible, in particular substantially, are aligned with each other. An advantage of this embodiment is that in the tool of the rear end, at the transfer point, initially only one channel, the second flow channel is formed, which affects the strength of the tool in the traversed by the second flow channel section only insignificantly. Also downstream of the second branch or branch point, passes through only one channel, the first flow channel, the tool. Only further forward, downstream of the first branch or branch point go from this, the connection channels to the cutting edges of the first cutting group, so that only in this section can affect the strength of the tool. In an alternative fourth embodiment of this system tool, the second branch point may be located downstream relative to the overflow section, and a second flow channel may provide fluid communication from the transfer section to the second branch point. Further, the first branch point may be located downstream of and spaced farther from the transfer section (or feed point) than the second branch point and a first flow channel may be in fluid communication from the transfer section to the first Establish branch or branch point. In this case, the design configurations of the first flow channel, the first branch or branch point and the connection channels of the first type can be coordinated with one another in relation to the structural configurations of the second flow channel, the second branch or branch point and the connection channels of the second type the response times of the supply of the cutting elements of the first kind and the cutting elements of the second kind, ie the first and the second cutting group, with the coolant and lubricant as far as possible, in particular substantially aligned with each other. In this embodiment, the first and the second cutting group can be individually supplied with coolant and lubricant via already beginning at the rear end of the Werkzeügs at the transfer section first and second flow channels.

In the third and fourth embodiments, the said adjustments in the structural configurations of the supply paths guided within the tool can cause the coolant and lubricant to be switched on when the coolant and lubricant supply is switched on in the cutting edges of the first cutting group, which are located further in front of the tool. are geometrically associated with longer supply paths, if possible largely, in particular essentially, arrives simultaneously as in the later in the tool arranged cutting the second cutting group, which are e.g. geometrically shorter supply paths are assigned.

In the third and the fourth embodiment of this system tool consisting of the tool holder and the tool, the parameters of the consequent structural design of the first supply paths, the following include: the length and the flow cross-section, in particular the diameter of the first flow channel, the length and the flow cross-section, in particular the diameter of a respective connection channel of the first kind, and a branch portion, in particular a branch angle of a respective connection channel first type at the first branch or branch point. The parameters of the design configuration of the second supply paths may include the following: the length and the flow cross section, in particular the diameter, the second flow channel, the length and the flow cross section, in particular the diameter, of a respective connection channel of the second type, and a branch portion, in particular a branch angle , a respective connection channel of the second kind at the second branch. Branching point. Again, the branch portions of a respective branch or branch point can be influenced or adjusted (enlarged or reduced) as already proposed above.

Alternatively, or in addition to the aforementioned embodiments, the system tool may further comprise a third group of blades having at least one third type of cutting element disposed on the tool, each third type of cutting element with respect to each first type of cutting element and with respect to each second type of cutting element is offset in an axial and / or radial direction of the system tool. In this case, the cooling and lubricant channel system may further comprise: a third branching or branching point assigned to the third cutting group for branching off coolant and lubricant from the cooling and lubricant channel system, and for each cutting element of the third type, a third connecting channel associated therewith which produces fluid communication from the third branching point to this cutting element so that a third type of supply path is formed for each cutting element of the third type, providing fluid communication from the feed point via the third branching point through the cutting element associated therewith Connecting channel third type manufactures. Here, the structural configurations of the supply paths of the first and second type and the structural configurations of the supply paths of the third type can now be selected such that the response times of the supply of the cutting elements of the first kind, the cutting elements of the second kind and the cutting elements third type, ie the response times of the first, second and third cutting group, with coolant and lubricant as far as possible, in particular substantially, are aligned with each other.

In a fifth embodiment of this system tool, the third branch point may be located downstream with respect to the transfer section, and a third flow channel may establish fluid communication from the transfer section to the third branch point. The first branch point may be downstream with respect to the third branch. Branching point can be arranged and a first flow channel can establish a fluid communication from the third branch or branch point to the first branch point or branch point. In this case, the constructive configurations of the first flow channel, the first branch or branch point and the connection channels of the first type can be coordinated with one another in relation to the structural configurations of the third branch or branch point and the connection channels of the third type such that the response times of the supply the cutting elements of the first kind and the cutting elements of the third type with the coolant and lubricant as far as possible, in particular substantially, are aligned with each other.

In a sixth embodiment of this system tool, the third branch point may be located downstream relative to the transfer section, and a third flow channel may provide fluid communication from the transfer section to the third branch point. The first branch point may be located downstream of the transfer section and spaced therefrom further than the third branch point and a first flow channel may establish fluid communication from the feed point to the first branch point. Here, the structural design of the first flow channel, the first branch or branch point and the connection channels of the first type in relation to the structural design of the third flow channel, the third branch or branch point and the connection channels of the third type can be coordinated so that the response times of the supply of the cutting elements of the first kind and the Cutting elements of the third kind with the coolant and lubricant as far as possible, in particular substantially, are aligned with each other.

In the fifth and sixth embodiments, the proposed adjustments in the structural configurations of the supply paths can cause the coolant and lubricant to be switched on when switching on the coolant and lubricant supply to the cutting edges of the first cutting group, which are arranged further in front of the tool. geometrically longer supply paths are assigned, if possible, in particular substantially, arrives simultaneously as in the later arranged in the tool cutting the third cutting group, which, for example. geometrically shorter supply paths are assigned.

The tool according to the second aspect of the invention may in particular be provided for coupling to a tool holder driving the rotation of the tool in a system tool according to the first aspect of the invention. However, it can also be coupled with another tool holder and operated, as long as it is ensured that the intended coolant and lubricant is passed through the tool holder in the coupling region properly in the tool or handed over.

In a seventh embodiment of the invention, in the tool according to the second aspect of the invention, the second branch point may be located downstream with respect to the feed point, and a second flow channel may provide fluid communication from the feed point to the second branch. Establish branching point. The first branch point or branch point can be arranged downstream with respect to the feed point and further away from the latter as the second branch point and branch point and a first flow channel can be a fluid communication from the feed point to the first branch. Establish branching point. In this case, the design configurations of the first flow channel, the first branch or branch point and the connection channels of the first type can be coordinated with one another in relation to the structural configurations of the second flow channel, the second branch or branch point and the connection channels of the second type the response times of the supply the cutting elements of the first type and the cutting elements of the second type with the coolant and lubricant are, if possible, in particular, substantially matched to one another.

In an eighth embodiment of the invention, in the tool according to the second aspect of the invention, the second branch point may be located downstream with respect to the feed point, and a second flow channel may establish fluid communication from the feed point to the second branch point , The first branch point may be located downstream relative to the second branch point, and a first flow channel may establish fluid communication from the second branch point to the first branch point. In this case, the design configurations of the first flow channel, the first branch or branch point and the connection channels of the first type can be coordinated with one another in relation to the structural configurations of the second branch or branch point and the connection channels of the second type such that the response times of the supply the cutting elements of the first type and the cutting elements of the second type with the coolant and lubricant are, if possible, in particular, substantially matched to one another.

In the seventh and eighth embodiments, the said adjustments in the constructive configurations of the supply paths can cause the coolant and lubricant to be switched on when switching on the coolant and lubricant supply to the cutting edges of the first cutting group, which are arranged further in front of the tool. geometrically longer supply paths are assigned as far as possible, in particular essentially, arrives at the same time as in the later arranged in the tool cutting the second cutting group, which, for example. geometrically shorter supply paths are assigned.

In the seventh and eighth embodiments of the invention, the parameters of the design of the first supply paths in the tool may include the following: the length and the flow cross section, in particular the diameter, of the first flow channel, the length and the flow cross section, in particular special diameter, a respective connection channel of the first kind, and a branch portion, in particular a branch angle, of a respective connection channel of the first kind at the first branch or branch point. The parameters of the design configuration of the second supply paths may include the following: the length and the flow cross section, in particular the diameter, the second flow channel, the length and the flow cross section, in particular the diameter, of a respective connection channel of the second type, and a branch portion, in particular a branch angle , a respective connection channel of the second kind at the second branch or branch point. Here as well, the branch portions of a respective branch or branch point can be influenced or adjusted (enlarged or reduced) as already proposed above.

With respect to the tool as such, in the tool system according to the third and fifth embodiments and in the tool according to the seventh embodiment of the invention in the tool, the flow cross sections of the connection channels of the first kind may be larger than the flow cross sections of the connection channels of the second kind. Also, in the tool, the lengths of the connection channels of the first kind may be smaller than the lengths of the connection channels of the second type. Furthermore, the flow cross section of the first flow channel may be larger than the flow cross section of the second flow channel. Furthermore, in the tool, the branch angles of the connection channels of the first type may be smaller than the branch angles of the connection channels of the second type. These specific embodiments of the tool in the third, fifth and seventh embodiments can cause the coolant and lubricant to be switched on when switching on the coolant and lubricant supply to the cutting edges of the first cutting group arranged further forward in the tool, via e.g. geometrically longer supply paths, if possible, in particular substantially, arrives at the same time as in the cutting edges of the second cutting group arranged further back in the tool, although the latter are e.g. geometrically shorter supply paths are assigned.

With regard to the tool as such, in the tool system according to the fourth and sixth embodiments and in the tool according to the eighth embodiment of the invention, the flow cross sections of the tool can be varied in the tool. Closing channels of the first kind to be larger than the flow cross sections of the connection channels of the second kind. Alternatively or additionally, in the tool, the flow cross section of the first flow channel may be larger than the flow cross section of the second flow channel. Furthermore, in the tool, the lengths of the connection channels of the first type may be shorter than the lengths of the connection channels of the second type. Still further, the branch angles of the connection channels of the first kind may be smaller than the branch angles of the connection channels of the second kind. These concrete of the tool in the fourth, sixth and eighth embodiments may cause the cooling and cooling

Lubricant when switching on the supply of coolant and lubricant in the cutting of the first group of cutting edges located further in front of the tool, via e.g. geometrically longer supply paths, if possible, in particular substantially, arrives at the same time as in the cutting edges of the second cutting group arranged further back in the tool, although the latter are e.g. geometrically shorter supply paths are assigned.

It should be noted that (i) the configuration of the tool with the first and second cutting groups in the system tool according to the third embodiment, in particular the configuration of the supply paths guided within the tool to the cutting edges of the first and second cutting groups, (ii) the embodiment of FIG Tool with the first and third cutting group in the system tool according to the fifth embodiment, in particular the said configuration of the guided in the tool supply paths to the cutting edges of the first and third cutting group, and (iii) the configuration of the tool according to the seventh embodiment with the first and second cutting group, in particular the said embodiment of the guided in the tool supply paths to the cutting edges of the first and second cutting group, each other. The correspondence here is in particular that in the third, fifth and seventh embodiment in the tool two different groups of blades are supplied via a starting from the feed point, common flow channel with coolant and lubricant.

It should also be noted that (iv) the configuration of the tool with the first and second cutting group in the system tool according to the fourth embodiment. (v) the configuration of the tool with the first and third cutting group in the system tool according to the sixth embodiment, in particular the said configuration of the supply paths to the cutting the first and third cutting groups, and (vi) the configuration of the tool with the first and second cutting group according to the eighth embodiment, in particular the said configuration of the supply paths to the cutting edges of the first and second cutting group correspond to each other. The correspondence here is in particular that in the fourth, sixth and seventh embodiment in the tool two different cutting groups are supplied via two different outgoing from the common feed point, a respective cutting group assignable flow channels with coolant and lubricant. In other words, the two different cutting groups are each supplied with its own, this associated flow channel with coolant and lubricant.

In an advantageous embodiment of the tool in the third, fifth and seventh embodiments, the tool may be composed of a first tool part, which can be arranged in a front portion of the tool in an axial direction and on which each cutting element of the first cutting group is arranged, and a second tool part, which can be arranged in a rear portion of the tool in an axial direction and with which the first tool part in particular detachably, connectable and on which each cutting element of the second cutting group is arranged. In this embodiment, a first portion of the first flow channel may extend within the first tool portion and be in fluid communication with the cutting elements of the first blade set, and a second portion of the first flow channel may extend within the second tool portion and first with the first portion through the connection channels Be kind in fluid communication. Further, the second flow channel may extend within the second tool part and be in fluid communication with the cutting elements of the second blade group through the second type port channels. The division of the tool into the assemblable first and second tool parts allows a modular use and, if necessary, a replacement of only the first o- the second tool part, for example, in the case of wear of one of the tool parts, or an exchange of one (the first or second) tool part by another (first or second) tool part with a different geometrical arrangement of the cutting edges group, for example, the tool for another Retool application.

In a special embodiment of the tool according to the third, fifth and seventh embodiments, the first and the second cutting group are arranged substantially only radially, and not axially, offset from one another, in particular at the front end portion and the front end of the tool. In this embodiment, in the tool, the cutting elements of the first cutting group can be arranged radially offset from the cutting elements of the second cutting group and viewed in the axial direction in the vicinity of the cutting elements of the second cutting group, in particular at or in the vicinity of a front end of the tool. In this embodiment, the radially inner cutting group can be used for centering the tool in the cutting operation.

In this embodiment, an axial receiving bore may be formed in an end face at the front end of the tool. In this case, the cutting elements of the second cutting group can be arranged at the front end of the tool, in particular on the end face of the tool. The cutting elements of the first cutting group can be arranged on a separate insert part, in particular on the end face thereof, wherein this insert part can be detachably inserted, in particular screwed, into the receiving bore. By arranging the first cutting group on the detachably insertable in the receiving hole insert part this is modular exchangeable or replaceable.

For the system tool according to the first aspect of the invention and for the tool according to the second aspect of the invention, and for all the above-mentioned (first to eighth) embodiments, the following further configurations are provided.

When the first cutting group has a plurality of cutting elements of the first kind, they can be substantially equal from the feeding point in the axial direction spaced and arranged to be distributed substantially uniformly in a circumferential direction. Accordingly, when the second cutting group has a plurality of cutting elements of the second kind, they may be substantially equally spaced from the feed point in the axial direction of the tool and may be substantially uniformly distributed in a circumferential direction of the tool.

The structural design of the supply paths of the first type can be selected such that a predetermined first supply rate of the coolant and lubricant is passed from the provided by the coolant and lubricant supply via the supply point supply rate of the coolant and lubricant to the first cutting group. Accordingly, the structural design of the supply paths of the second type can be selected such that a predetermined second supply rate of the coolant and lubricant is conducted from the supply rate provided via the feed point to the second cutting group. As long as no further (third, fourth, or further) cutting groups are provided, the amount of coolant and lubricant supplied per unit time (ie, the supply rate) from the coolant and lubricant supply is divided into a first supply rate for the first group of cutting edges and one second supply rate for the second cutting group.

In this case, the ratio between the first supply rate and the second supply rate to the functions, and in particular, e.g. adapted to the removal rates and / or the size and / or the machined dimensions or surfaces of the respective processing region of the cutting elements, the first cutting group and the second cutting group. For example, a cutting group disposed at the front end of the tool, which serves to center the tool, requires less coolant and lubricant per unit time, i. a lower supply rate, as a radially outwardly disposed cutting group, which may have about the function of a lowering angle or a reamer.

For example, if the first and second cutting groups have a similar function and / or a comparable removal rate, it may be provided that the ratio between the first supply sub-rate and the second supply sub-rate be in a range of (1/2 -Δ ) to (1/2 + Δ) to deliver. Here, 0 <Δ <0.20, more preferably 0 <Δ <0.10 and even more preferably 0 <Δ <0.05. Here, the total per unit time supplied amount of coolant and lubricant in the ratio (1/2 -Δ) to (1/2 + Δ), essentially evenly, divided into the first and the second cutting group.

If, for example, the first and second cutting groups have different functions and / or different removal rates, it is possible to provide the ratio between the first supply sub-rate and the second supply sub-rate in a range of (1/3-δ)% to ( 1/3 + δ)% or in a range of (2/3-δ)% to (2/3 + 6)%. In this case, (-1/6) <δ <(+1/6), more preferably (-1/12) <δ <(+1/12) and even more preferably (-0.05) <δ <(+ 0.05). In other words, in this case, the amount of coolant and lubricant supplied per unit time with a specified by the size δ tolerance in the ratio of 1/3 to 2/3 (33.3% to 66.6%) on the first and the second cutting group divided up.

A system tool according to the first aspect of the invention and analogously also a tool according to the second aspect of the invention can form a trade unit together with a certificate created for this system tool, the certificate containing at least information about the first and the second supply sub-rate.

Embodiments of the invention are explained in more detail below with reference to schematic drawings. Show it:

Figure 1 A is a block diagram of a tooling system of a system tool according to a first embodiment, wherein the system tool is driven by a machine tool and connected to a coolant and lubricant supply;

Figure 1B is a block diagram of a system tool according to a second embodiment in the vicinity of the tool processing system of Figure 1; Figure 1C is a block diagram of a system tool according to a third embodiment in the vicinity of the tool processing system of Figure 1;

Figure 1 D is a block diagram of a system tool according to a fourth embodiment in the vicinity of the tool processing system of Figure 1;

FIG. 1E is a block diagram of a system tool according to a fifth embodiment in the vicinity of the tool processing system of FIG. 1;

Figure 1F is a block diagram of a system tool according to a sixth embodiment in the vicinity of the tool processing system of Figure 1;

Figure 2A is a block diagram of a system tool according to an eighth embodiment;

FIG. 2B is a block diagram of a system tool according to a seventh embodiment;

3A shows a cross section through a tool of the system tool according to the fourth embodiment from FIG. 1D, FIG.

FIG. 3B shows in detail from FIG. 3A a cross-section through a first variant of the front end section of the tool from FIG. 3A with one

Cutting element of a first cutting group,

FIG. 3C shows in detail from FIG. 3A a cross-section through a second variant of the front end section of the tool from FIG. 3A with one

Cutting element of a first cutting group,

FIG. 3D, as a detail from FIG. 3A, shows a cross section through a section of the FIG

Tool of the figure 3A with a cutting element of a second

Cutting group

Figure 4A shows a cross section through the front end portion of a tool of

System tool according to the eighth embodiment of Figure 2A,

4B shows a cross section through the front end portion of a tool of the

System tool in an advantageous embodiment of the eighth embodiment of Figure 2A,

5 shows a cross section through the front section of a tool of the system tool in an advantageous embodiment of the fourth embodiment of FIG. 1 D, FIG. 6A shows a cross section through the front portion of a tool of the system tool according to the third embodiment of FIG. 1C, FIG.

6B shows in detail from FIG. 6A a cross section through the front end section of the tool from FIG. 6A with a cutting element of a first cutting group, FIG.

FIG. 6C shows a detail of FIG. 6A as a detail through a section of the FIG

Tool from FIG. 6A with a cutting element of a second cutting group,

Figure 6D is a front view of the front end portion of the tool of the figure

6A,

7 shows a cross section through a system tool according to an advantageous

Embodiment of the first embodiment of Figure 1A;

Figure 8 is a schematic perspective view of a stepped drilling tool according to another embodiment of the invention;

Figure 9 is a sectional view of the front portion of the tool of Figure 8 according to a first variant; and

Figure 10 is a sectional view corresponding to Figure 9 of the front portion of

Tool according to Figure 8 according to a second variant.

The system tool 50 and the tool 58 according to the invention are used in a tool machining system 10 for the rotational machining of a workpiece (not shown), as shown schematically in FIG. 1A. It should already be emphasized at this point that the tool or system tool can be designed or used both as a rotating tool and as a stationary tool.

The tool machining system 10 comprises a coolant and lubricant preparation 20, a machine tool 40, with a drive coupling 42, a system tool 50 which is composed of a tool holder 52 and a tool 58 that can be connected to it in a rotationally fixed manner. The coolant and lubricant preparation 20 comprises a coolant and lubricant supply 32 with an oil-air mixer 30. This air 22 are supplied through an air supply line 24 and a suitable coolant and lubricant (oil) from an oil reservoir 26 through an oil supply line 28 and therein mixed into a coolant and lubricant in the form of an aerosol consisting of fine fine oil droplets dispersed in the air and entrained in flowing air. The coolant and lubricant (aerosol) is supplied from the coolant and lubricant supply 32 through a coolant and lubricant supply line 33 to the machine tool 40 at a pressure on the order of about 50 bar, through the machine tool 40 and drive coupling 42 to the system tool 50 fed.

The form of cooling and lubricant supply shown in FIG. 1 is known by the term single-channel supply, because the machine tool 40 is supplied with the coolant and lubricant (aerosol) via a single line (channel) 33. However, the system tool 50 or the tool 58 according to the invention can also be operated with a so-called two-channel supply or supplied with coolant and lubricant, in which the air 22 and the oil 26 by their own lines 24 and 28 respectively supplied to the machine tool 40 and only shortly before the transfer into the system tool 50, but still within the machine tool 40, are mixed. In principle, the present invention is also applicable to a conventional coolant and lubricant supply in which a liquid coolant and lubricant is supplied to the system tool 50.

The system tool 50 essentially comprises two parts, firstly a tool holder 52 and secondly a tool 58 connected to it in a rotationally fixed manner. The tool holder 52 comprises a coupling section 54 arranged at its rear end (ie facing the machine tool 40), via which the tool holder 53 rests the rotatable drive coupling 42 which can be driven by the machine tool 40 can be connected (coupled) in a rotationally fixed manner and has a substantially sleeve-shaped receiving section 56 in which a rear end section (of the machine tool 40 facing) of the tool 58 can be detachably and non-rotatably received in a connectable manner. The tool 58 typically comprises a shaft portion 60 standardized in its geometrical dimensions, which is largely or completely receivable in the receiving portion 56 of a tool holder 52, and a front working portion 62 which carries the groups of blades. Embodiments of the coupling between the coupling portion 54 of Tool holder 42 and the drive coupling 42 of the machine tool 40 are known in the art and an embodiment of such a coupling is shown in Fig. 7 and described in this regard below. The non-rotatable and detachable connection between the tool 58 and the tool holder 52 can likewise be realized in a manner known to the person skilled in the art, for example in the form of a heat-shrinkable coupling or in the form of a chuck arranged in the receiving section 56 of the tool holder 52. Because of this detachable connection, different types of tools 58, which can have, for example, different diameters, working depths and different arrangements or distributions of cutting groups, can be connected to different tool holders 52, whereby different configurations of the coupling portion 54 make it possible to attach the tool holder 52 to different coupling systems Coupling sections 42 different machine tools 40 to couple.

As already mentioned, in the invention described herein, two (or more) groups of cutters are as far as possible, in particular substantially simultaneously, i. with as far as possible adapted, in particular substantially the same, response times when switching on the coolant and lubricant supply to supply with coolant and lubricant. With regard to the distribution of two (or more) groups of cutters to be supplied, a plurality of configurations are now conceivable, as indicated in FIGS. 1A to 1F. In the embodiments shown in FIGS. 1A and 1B, a first cutting group 64 is arranged on the tool 58 and a second cutting group 74 on the tool holder 52. In the embodiments shown in Figures 1C and 1D, the first and second blade sets 64, 74 are formed on the tool 58, as well as those in Figures 2A, 2B, 3A through 3D, 4A, 4B, 5, 6A through 6D and 7 shown embodiments.

Of course, three or more cutting groups can be provided. In the embodiments shown in FIGS. 1E and 1F, two blade groups (the so-called first 64 blade group and the third blade group 84 referred to herein) are formed on the tool 58 and a blade group (the so-called second blade group 74) on the tool holder 52 , In the embodiments shown in FIGS. 1A, 1B, 1E and 1F, in which one (the second) cutting group 74 on the tool holder 52 and at least one (the first) cutting group 64, or also further (such as the third) cutting group 84, formed on the tool 58, it is inventively about the response times of the supply (the cutting) arranged on the tool holder 52 cutting group 74 and the response times of the supply (the cutting) formed on the tool 58 first cutting group 64, and possibly also the the third cutting group 84, with the supply and lubricant in the considered system tool 50, consisting of tool holder 52 and tool 58, via a common feed point 34, which in these embodiments in one of the machine tool 40 facing coupling portion 54 of the tool holder 52nd is arranged.

If no groups of blades are arranged on the tool holder 52 and only at least two groups of cutters arranged on the tool 58 are to be supplied with coolant and lubricant, then the common infeed point 34 is located for the system then to be considered according to the invention, namely the tool 58 the machine tool 40 facing the end of the tool 58 and is designed in the form of a usually standardized transfer section 94.

In all embodiments of the system tool 50 shown in FIGS. 1A to 1 F or in all embodiments of the tool 58 shown in FIGS. 2 to 7, the system tool 50 or the tool 58 comprises a first cutting group 64 with at least one cutting element 64 a, 64b and a second cutting group 74 with at least one cutting element of the second kind 74a, 74b. In this case, each cutting element of the second type 74a, 74b and thus the second cutting group 74 with respect to each cutting element of the first kind 64a, 64b and thus the first cutting group 64 in an axial direction (ie in the direction of the axis of rotation 44 of the tool 58 and the system tool 50th and / or in its radial direction) arranged offset. The first cutting group 64 is assigned a first branch or branch point 68. Each cutting element of the first type 64a, 64b has associated therewith a first-type connecting channel 70a, 70b which produces fluid communication from the first branching point or branching point 68 to this cutting element 64a, 64b. provides. Correspondingly, a second branching or branching point 78 is associated with the second cutting set 74, and a second type of connecting channel 80a, 80b is associated with each second cutting element 74a, 74b, which provides fluid communication from the second branching point 78 to this cutting element 74a , 74b. The first and second branching points 68, 78 are disposed in a generally axial passage of a coolant and lubricant passage system. The coolant and lubricant channel system is formed entirely within the system tool 50 and the tool 58, respectively, and serves to distribute the coolant and lubricant from the common feed point 34 to each cutting element of each cutter group, through or via the branch associated with each cutter group. or branching points.

In this way, for each cutting element of the first kind 64a, 64b an outgoing from the feed point 34 supply path of the first type is formed, the fluid communication from this feed point 34 via the first branch or branch point 78 through this cutting element 64a, 64b associated connection channel of the first kind 70a, 70b produces. Correspondingly, each cutting element of the second type 74a, 74b has a supply path of the second type emanating from the feed point 34, which forms a fluid communication from the feed point 34 via or via the second branch or branch point 78 through the connection channel of the second type arranged for this cutting element 74a, 74b 80a, 80b produces.

The designation of the first and second cutting group as first and second cutting group is chosen herein such that the corresponding supply paths of the first kind from the feed point 34 to the cutting elements of the first type 64a, 64b are geometrically longer than the supply paths of the second type from the feed point 34 to the Cutting elements of the second kind 74a, 74b. With axial displacement of the first and second cutting groups 64, 74, respectively, the first cutting group 64 is closer to the front, i. the machine tool 40 facing away, the end of the tool 58 arranged as the second cutting group 74th

According to the invention, the constructive embodiments of the supply paths of the first kind and the constructive configurations of the supply paths second type designed or selected so that the response time of the supply of the cutting elements of the first type 64a, 64b and the response time of the supply

Cutting elements of the second kind 74a, 74b with coolant and lubricant are substantially aligned with each other, and this despite the different geometric lengths of the supply paths first and second type.

In the embodiments of the system tool 50 shown in FIGS. 1A, 1B, 1E and 1F, the feed point 34 is arranged in the coupling section 54 of the tool holder 52 provided for coupling to the drive coupling 42 of the machine tool 40. The coolant and lubricant channel system includes a transfer section 94 for passing coolant and lubricant from the tool holder 52 to the tool 58 and a center channel 92 extending in the tool holder 52 and establishing fluid communication from the feed point 34 to the transfer section 94. The first cutting group 64 and each connecting channel of the first kind 70a, 70b are arranged in the tool 58, whereas the second cutting group 74, the second branching point 78 and each connecting channel of the second kind 80a, 80b are arranged in the tool holder 52 and the second Branching point 78 in fluid communication with the central channel 92 is.

The embodiments shown in FIGS. 1A and 1B differ from each other in the position of the first branch point 68. In the first embodiment shown in FIG. 1A, the first branch point 68 is located downstream from the transfer section 94 that is, disposed within the tool 58 between the rear and front ends thereof, and in the tool 58, there is provided a first flow channel 66 that communicates (communally) with fluid from the transfer section 94 to the first branch. Branching point 68 produces. According to the invention here are the structural configurations of the supply paths of the second kind, ie the structural design of the central channel 92 of the section from the second branch or branch point 78 to the transfer section 94, the transfer section 94, the first flow channel 66, the first branch or branch point 68 and the connection channels of the first type 64a, 64b with respect to the constructional configurations of the supply paths of the second kind, ie the second branch point or branch point 78 and the connection branch. Channels of the second type 68a, 68b, coordinated so that the response times of the supply of the cutting elements of the first type 64a, 64b and the supply of the cutting elements of the second type 74a, 74b with the coolant and lubricant as far as possible, in particular substantially, are aligned.

Selectable or configurable parameters of the structural configuration of the first supply paths include the following: the length and the flow cross section of the portion of the central channel 92 from the second branching point 68 to the transfer section 94, the length and the flow cross section of a respective connection channel 70a, 70b first type, a branch portion of a respective connection channel 70a, 70b first type at the first branch or branch point 68 and the length and the flow cross-section of the first flow channel 66. Selectable or configurable parameters of the structural design of the second supply paths include the following: the Length and the flow cross-section of a respective connection channel of the second kind 80a, 80b and a branch portion of a respective connection channel of the second type 80a, 80b to or from the second branch or branch point 78. According to the invention, the response times of the supply the cutting elements of the first type 64a, 64b and the cutting elements of the second kind 74a, 74b the structurally longer supply paths of the first kind constructively designed so that their total flow resistance is as low as possible, so that the coolant and lubricant can flow relatively fast dahindurch, and the geometrically shorter Supply paths of the second kind are structurally designed so that their flow resistance is higher or relatively high overall, so that the coolant and lubricant of a relatively longer time, which compensates for the Weglängenunterschied needed to reach the cutting elements of the second kind. In this sense, the first flow channel 66 has a comparatively large flow cross section, in particular a large diameter, and the connection channels of the first type 70a, 70b receive the shortest possible length and the largest possible flow cross section in comparison to the second type connection channels 80a, 80b. Furthermore, the branch portion for the respective second-type connection channels 80a, 80b at the second branch point or branch point 78 can be made small. The branch share can be determined, for example, via the branch angles, ie the angles between the axes of the respective Secondary ducts with respect to the longitudinal channel containing the second branching or branching point 78.

In the second embodiment of the system tool 50 shown in FIG. 1B, the first branching point 68 associated with the first cutting group 64 is located at the rear end portion of the tool 58 near and coupled to the transfer portion 94 and the first type of cutting elements 64a, 64b are supplied with coolant and lubricant through respective first type port channels 70a, 70b that extend substantially through the entire tool 58 from the first branch point 68. As shown in FIG. According to the invention here are the structural configurations of the central channel 92 in its portion from the second branch or branch point 68 to the transfer section 94, the first branch or branch point 78 and the connection channels of the first type 70a, 70b with respect to the structural embodiments of the second Branching or branching point 78 and the connection channels of the second type 80a, 80b coordinated so that the response times of the supply of the cutting elements of the first type 64a, 64b and the supply of cutting elements of the second type 74a, 74b with the coolant and lubricant if possible, in particular in essence, are aligned with each other. According to this principle, in this case the connection channels of the first type 70a, 70b receive a relatively large flow cross section (diameter), so that the flow of the coolant and lubricant therethrough relatively quickly and with the lowest possible flow resistance, whereas the second type of connection channels 80a, 80b a relatively smaller Flow cross-section (diameter) obtained. Optionally, in addition, the branch portion at the second branch point or branch point 78 is made small, so that the flow resistance of the supply paths of the second kind is increased relative to the flow resistance of the supply paths of the first kind.

In the embodiments of the system tool 50 shown in FIGS. 1C and 1D, the first and second cutting groups 64, 74 are arranged in the tool 58, corresponding to the first branching and branching point 68 and each connecting channel of the first type 70a, 70b and second branch or branching point 78 and each connecting channel of the second type 80a, 80b in the tool 58 orderly. The coolant and lubricant channel system includes a transfer section 94 for passing coolant and lubricant out of the central channel 92 of the tool holder 52 into the tool 58. The embodiments of FIGS. 1C and 1D differ from each other in the position of the second branch point 78 ,

In the embodiment shown in FIG. 1C, the second branch point 78 is located downstream with respect to the transfer section 94, and a second flow channel 76 establishes fluid communication from the transfer section 94 to the second branching branch 78. The first branch point 68 is downstream with respect to the second branch. Branching point 78 arranged and a first flow channel 66 provides a fluid communication from the second branching point or branch point 78 to the first branch point or branch point 68 ago. Herein are now the constructive embodiments of the supply paths of the first kind, ie the first flow channel 66, the first branch or branch point 68 and the connection channels of the first kind 70a, 70b with respect to the constructive embodiments of the supply paths of the second kind, the second branch or Branching point 78 and the connection channels of the second type 80a, 80b coordinated so that the response times of the supply of the cutting elements of the first type 64a, 64b and the cutting elements of the second type 74a, 74b with coolant and lubricant are substantially equal to each other. In particular, the connection channels of the first type 70a, 70b here each have a relatively large flow cross-section and their length is chosen as short as possible, and the first flow channel 66 obtains the largest possible flow cross section and the shortest possible length, whereas the second type connection channels 80a, 80b each have a relative small flow cross-section and optionally obtained a greater length. In addition, the branch portion of the connection channels second at the second branch or. Branching point 78 may also be kept relatively small, to compensate for the shorter geometric path length of the supply paths of the second type and to increase the transit time through the supply paths of the second kind in relation to the geometric path length and to match the duration by the supply paths of the first kind as far as possible. In the fourth embodiment of the system tool 50 shown in FIG. 1D, the second branch point 78 is located downstream with respect to the transfer section 94, and a second flow channel 76 provides fluid communication from the transfer section 94 to the second branch line Branch point 78 ago. Also, the first branch point 68 is located downstream with respect to the transfer section 94, farther from the transfer section 94 than the second branch point 78, and a first flow channel 66 longer than the second flow channel 76 is, establishes fluid communication from the transfer section 94 to the first branch point 68. In this embodiment, the cutting elements of the first type 64a, 64b via the first flow channel 66 and the cutting elements of the second type 74a, 74b via the second flow channel 76 individually or substantially independently supplied with the coolant and lubricant. According to the invention, the constructive configurations of the supply paths of the first kind, ie of the first flow channel 68, of the first branch or branch point 68 and of the connection channels of the first type 70a, 70b in relation to the structural configurations of the supply paths of the second type, ie the second flow channel 78, the second branch. Branching point 78 and the connection channels second 80a, 80b, so coordinated that the response times of the supplies of the cutting elements of the first type 64a, 64b and the cutting elements of the second type 74a, 74b with the cooling and

If possible, lubricants are aligned with each other.

In the fifth and sixth embodiments shown in FIGS. 1E and 1F, in addition to the first cutting group 64 arranged on the tool 58 and the second cutting group 74 arranged on the tool holder 52, a third cutting group 84 is arranged on the tool 58. The third cutting group 84 comprises at least one cutting element of the third kind, here two cutting elements 84a, 84b. Each third type of cutting element 84a, 84b is offset with respect to each first type of cutting element 64a, 64b and with respect to each second type of cutting element 74a, 74b in an axial and / or radial direction of the system tool 50. The cooling and lubricant channel system further comprises a third branch or branch point 68 assigned to the third cutting group 84, and a connecting channel assigned thereto for each cutting element of the third type 84a, 84b third type 90a, 90b, which establishes fluid communication from the third branching point 68 to the respective cutting element 84a, 84b. In this way, also for each cutting element of the third type 84a, 84b, a supply path (supply path of the third type) is formed, the fluid communication from the feed point 34 via the third branch or branch point 68 by this

Cutting element 84a, 84b associated with connecting channel third type 90a, 90b produces. According to the inventive concept, the constructive configurations of the supply paths of the third type are selected in relation to the constructional configurations of the supply paths of the first and second type such that the response times of the supply of the cutting elements of the third type 64a, 64b are adapted as far as possible to the response times of the supplies of the cutting elements first type 64a, 64b and the second type of cutting elements 74a, 74b. The embodiments shown in FIGS. 1E and 1F differ essentially in the position of the third branch point or branch point 88.

In the fifth embodiment shown in FIG. 1 E, the third branch or. Branching point 78 downstream with respect to the transfer section 94 arranged and a third flow channel 86 provides a fluid communication before the transfer section 94 to the third branch point or branch point 88 ago. The first branch point 68 is downstream with respect to the third branch. Branching point 88 arranged and a first flow channel 66 provides a fluid communication from the third branch point 88 to the first branch point or branch point 68 ago. Herein, according to the invention, the constructive configurations of the supply paths of the first kind, ie the first flow channel 68, the first branch or branch point 68 and the connection channels of the first type 70a, 70b are described in relation to the structural configurations of the supply paths of the third type, ie the third branch. or branch point 88 and the third type of connection channels 90a, 90b coordinated so that the response times of the supply of the cutting elements of the first type 64a, 64b and the cutting elements of the third type 84a, 84b with the coolant and lubricant are adapted to each other if possible. The proposals made with regard to the supply of the first and second cutting groups 64, 74 in the third and fourth embodiments of FIGS. 1C and 1D can be applied mutatis mutandis to the supply of coolant and lubricant of the first and third th e cutting group 64, 84 are transmitted in the fifth and sixth embodiments of Figures 1 E and 1 F, and are therefore not carried out or repeated here in detail, in particular with regard to adjusting the response times.

In the sixth embodiment shown in Fig. 1 F, the third branch or. Branching point 88 downstream with respect to the transfer section 94 arranged and a third flow channel 86 provides a fluid communication from the transfer section 94 to the third branch point or branch point 88 ago. The first branch point 68 is also located downstream with respect to the downcomer section 94, but spaced therefrom farther than the third branch point 88, and a first flow channel 66 that is longer than the third flow channel 86, provides fluid communication from the transfer section 94 to the first branch point 68. Here are the structural configurations of the supply paths of the first kind, i. of the first flow channel 66, the first branch point 86 and the first type connection channels 70a, 70b with respect to the structural configurations of the third type supply paths, i. of the third flow channel 86, the third branch or branch point 88 and the third type of connection channels 90a, 90b coordinated that the response times of the supply of the cutting elements of the first type 64a, 64b and the third type of cutting elements 84a, 84b with the cooling and If possible, lubricants are aligned with each other. The proposals described with regard to matching the response times of the supply of the first and second cutting groups 64, 74 in the fourth embodiment shown in FIG. 1B can be applied analogously to the configurations of the supply paths to the first and third cutting groups 64, 84 in the The sixth embodiment shown in FIG. 1F is transmitted, and will therefore not be further elaborated or repeated here.

With regard to the embodiments shown in FIGS. 1 C, 1 D, 1 E and 1 F, in which two blade groups arranged offset axially and / or radially relative to one another are arranged on the tool, they can also be connected to the tool independently of the coupling of the tool 58 Tool holder 52 in the system tool 50 also apply to the tool 58 alone. Accordingly, the inventive Basic idea can also be applied in a tool 58 with at least two axially and / or radially staggered arranged blade groups.

In the seventh and eighth embodiments shown in Figs. 2A and 2B, a tool 58 for rotating, machining a workpiece is shown. The tool 58 can also be connected directly to a coolant and lubricant supply via a transfer section 94, wherein the transfer section 94 forms a feed point 34 of coolant and lubricant in or for this tool 58. With reference to FIGS. 1A to 1F, the tool 58 can be detachably coupled for coupling to a tool holder 52 driving the rotation of the tool 58, this in turn being coupled to a drive coupling 43 of a driving machine tool 40. The tool 58 includes a first cutting group 64 having at least one first type cutting element 64a, 64b and a second cutting group 64 having at least one second type cutting element 74a, 74b, each second type cutting element 74a, 74b and therefore the second cutting group, with respect to each Cutting element of the first kind 64a, 64b, and thus the first cutting group, is arranged offset in an axial and / or radial direction of the tool. Within the tool 58, a coolant and lubricant passage system for distributing the coolant and lubricant from the feed point 34 to each of the first and second cutting elements is formed. This coolant and lubricant channel system comprises a first branch or branch point 68 assigned to the first cutting groups 64 for branching off coolant and lubricant from the coolant and lubricant channel system, and for each cutting element of the first type 64a, 64b a connecting channel of the first type 70a associated therewith , 70b, which establishes fluid communication from the first branch point 68 to this cutting element 64a, 64b. In this way, a supply path of the first type is formed for each cutting element of the first type, which produces fluid communication from the feed point 34 via the first branch or branch point 68 through the connecting channel of the first type 70a, 70b assigned to this cutting element 64a, 64b. Furthermore, the coolant and lubricant channel system comprises a second branch or branching point 78 assigned to the second cutting group 74, and for each second-type cutting element 74a, 74b, a second-type connecting channel 80a, 80b that communicates fluid communication from the second Branch or branching point 78 produces this cutting element. Thus, for each cutting element of the second type 74a, 74b, a supply path of the second type 80a, 80b is formed which establishes fluid communication from the feed point 34 via the second branch or branch point 78 through the connection channel of the second type 80a, 80b assigned to this cutting element 74a, 74b , According to the invention herein, the structural configurations of the supply paths of the first kind 70a, 70b and the constructive configurations of the supply paths of the second type 80a, 80b are selected such that the response times of the supply of the cutting elements of the first type 64a, 64b and those of the cutting elements of the second type 74a, 74b with cooling - And lubricants are adapted to each other if possible. The seventh and eighth embodiments shown in FIGS. 2A and 2B are different from each other in the arrangement of the second branch point 78.

In the seventh embodiment shown in Fig. 2A, the second branch is. Verzeigungsstelle 78 downstream with respect to the feed point 34 and the transfer section 94 arranged and a second flow channel 76, which is within, for. B. in the axial direction, the tool 58, provides a fluid communication from the feed point 34 and the transfer portion 94 to the second branch. Branch point 78 ago. The first branch point 78 is located downstream with respect to the feed point 34 and transfer portion 94 and farther from the transfer portion 94 than the second branch point 78, and a lead channel 66 longer than the second flow channel 76, provides fluid communication from the feed point 34 to the first branch point 68. In this embodiment, therefore, the first cutting group 64 is supplied with coolant and lubricant through the first flow channel 66 independently of or individually with respect to the second blade group 74 supplied by the second flow channel 76. According to the invention, the structural design of the supply paths of the first kind, ie the first flow channel 66, the first branch or branch point 68 and the connection channels of the first kind 70a, 70b with respect to the constructive configurations of the supply paths of the second kind, ie the second flow channel 76, the second branch -bzw. Branching point 78 and the connection channels of the second type 80a, 80b, so matched to one another that the response times of the supply of the cutting elements of the first type 64a, 64b and the cutting elements of the second type 74a, 74b with the coolant lubricant are adapted as far as possible to each other.

Concretely selectable parameters of the structural configuration of the first supply paths include the following: The length and the flow cross section, in particular the diameter of the first flow channel, the length and the flow cross section, in particular the diameter of a respective connection channel of the first kind 70a, 70b and a branch portion of a respective Conveniently selectable parameters of the design of the second supply paths include the following: the length and the flow cross section, in particular the diameter of the second flow channel 76, the length and the flow cross section , in particular the diameter, of a respective second-port connection channel 80a, 80b and a branch-off component of a respective second-port connection channel 80a, 80b at the second branching point or branching point 78. The branching portions may be provided by providing or not Vo see of flow-mechanically advantageous guide surfaces and / or by fluid mechanical advantageous embodiments of the merging channel inner wall surfaces, and in particular by selecting a branch angle of each connection channel of the second type of the main channel (second flow channel 76) selected, i. as required, increased or decreased.

Investigations Tools with differently designed cooling and

Lubricant channel system and each having a plurality of blade groups have shown that the flow cross sections of the first and second type of connection channels primarily influencing parameters, and further that the flow cross sections of the first and second flow channel and to a lesser extent also their lengths still a significant influence in terms of equalization the response times have effective parameters. The differences in the geometric path lengths of the supply paths of the first and second type, wherein the supply paths of the first kind with respect to the supply paths of the second type are to be regarded as the geometric longer and the resulting differences in the response times of the supplies with cooling and

Lubricants of the first and second cutting group can thereby be reduced and the response times are largely matched to one another, in particular by the following measures: The flow cross sections of the connection channels of the first type 70a, 70b are selected to be larger than the flow cross sections of the connection channels of the second type 80a, 80b. Furthermore, the flow cross section of the first flow channel 66 is selected larger than the flow cross section of the second flow channel 76. Also, the lengths of the connection channels of the first type 70a, 70b may be shorter if possible than the lengths of the connection channels of the second type 80a, 80b. The choice of the branch angle of the connection channels first or second type affects the branch shares of the respective connection channels first and second type at the first and second branch or branch point 68, 78. To adjust the response times, for example, the branch angle of the connection channels of the first kind 70a, 70b smaller than the branch angle of the second-port connection channels 80a, 80b are selected.

The principal considerations presented hereinabove with respect to the eighth embodiment as shown in FIG. 2A can be applied to the embodiments shown in FIGS. 3A to 3D, FIGS. 4A and 4B, FIG. 5 and FIG the first and second branch and supply points 68 and 78 downstream with respect to the feed point 34 and the transfer portion 94 and arranged via individual first and second flow channels 66 and 76 with cooling and

Lubricant be supplied.

In the seventh embodiment shown in Fig. 2B, the second branch. Branching point 78 disposed downstream with respect to the feed point 34 and a second flow channel provides a fluid communication from the feed point 34 to the second branch point or branch point 78 ago. The first branching point 68 is located downstream relative to the second branching point and a first flow channel 66 establishes fluid communication from the second branching point 78 to the first branching point 68. Herein, the constructive configurations of the supply paths of the first kind, ie the first flow channel 68, the first branch or branch point 68 and the connection channels of the first type 70a, 70b in relation to the constructive configurations of the supply paths of the second kind, ie the second variant. Branching point or branch point 78 and the second-port connection channels 80a, 80b coordinated so that the response times of the supply of the cutting elements of the first type 64a, 64b and the cutting elements of the second type 74a, 74b with the coolant and lubricant are adapted to each other as far as possible ,

In the embodiment of a tool 100 shown in FIGS. 3A to 3D, the configuration of the coolant and lubricant channel system formed therein corresponds in principle to the embodiments of the embodiments shown in FIGS. 1D, 1F and 2A in the following respect. A first cutting group 1 14 is supplied with coolant and lubricant via a first flow channel 115, a first branch point or branch point 117 and connection channels of the first type 116a, 116b individually or independently of a second cutting group 118. The second cutting group 1 18 is supplied by its own associated second flow channel 1 19, a second branch or branch point 121 assigned to it and connecting channels 120 a, 120 b of the second type. The first cutting group 114 is further spaced from the feed point 34 at the rear (ie, the machine tool 40 facing) end of the tool 100 as the second cutting group 18, so that the supply paths of the first type geometrically longer than the supply paths of the second type and the first flow channel 1 15 longer than the second flow channel 1 9 are. The first cutting group 114 is arranged at the front end 122 of the tool 00, and the second cutting group 118 thereto axially towards the end of the machine tool 40 end facing a shoulder 140 of the tool 100. For matching the response times of the supply of the cutting elements of the first kind 14a, 1 14b and the cutting elements of the second type 18a, 118b and for compensating the different geometric path lengths of the supply paths of the first and second type are in the tool 100 primarily the flow cross-sections, ie the diameter, D1. 6 the connection channels of the first type 106a, 106b (see FIGS. 3B and 3C) are larger than the flow cross sections, ie the diameters D120 of the second connection channels 120a, 120b are configured (see FIG. 3D). Furthermore, the flow cross section, in particular the diameter D115, of the first flow channel 115 (see FIGS. 3B and 3C) is greater than the flow cross section, in particular the diameter D1 19, of the second flow channel 119. The branch angle A1 6 of the first connection channel 119 can also be greater. Channels 116a, 116b at the first branch or branch point 117 smaller than the branch angle A120 of the connection channels of the second type 120a, 120b be configured.

In the embodiments shown in FIGS. 3A and 3B, an extension of the first flow channel 115 beyond the first branch point or branch point 117 is closed by a closure 134, which may be formed, for example, by soldering. The closure 134 serves to avoid or minimize a dead volume in which lubricant could accumulate. In the embodiment shown in Figure 3c, such a closure 134 is not provided and the first flow channel 1 15 is in the axial direction to the front end 122 out, i. beyond the first branch point or branch point 117, extends and opens through a constriction 132 in a constricted end-side outlet 128 in the end face 124 of the tool 100.

In this way, through the first flow channel 1 15 or its extending through the first branch or branch point 117 extension one, in particular in the middle, arranged on the end face 124 centering 126 (as shown in Fig. 3C) with coolant lubricant be supplied by the configuration of the constriction 132, which is variable in terms of their Durchlaßöffnungsgröße and their length, with a selectably highly throttled supply rate.

In the embodiments of tools 200, 300, 400, 500, 600 shown in FIGS. 4A, 4B, 5, 6A to 6D and 7, functionally comparable elements are denoted by reference numerals, which differ by 100 and which correspond to the Hundreds of the reference number have the same number as the reference number of the tool.

The tools 200 and 300 shown in FIGS. 4a and 4b correspond to the basic design of the coolant and lubricant channel system formed in the tool in the embodiments shown in FIGS. 1D, 1F and 2A and 3A to 3D in that the tool 200 , 300 each comprise a first cutting group 214, 314 and a second cutting group 218, 318, the first cutting group 214 having its own first flow channel 215, 315 and its own first branch and. Branching point 217, 317 and independently of the second cutting group 218, 318 a separate second flow channel 219, 319 and a separate second branch and branch point 221, 321 is assigned.

The first cutting group 214 and the second cutting group 218 are substantially radially offset from one another and only slightly offset axially relative to one another, both at the front end 222, 322 of the tool 200, 300. The first cutting group 214 is at a centering tip 226, 326 in FIG the center of the end face 224, 324 and serves to center and center the tool 200, 300 during its operation in a machined material processing. The second cutting group 218, 318 is arranged radially further apart from the axis of rotation 212, 312 of the tool 200, 300. As can be seen in particular from FIG. 4A, the first and second flow channels 215, 219 are guided substantially parallel to one another, and the distance of the first branch point 217 from the rear end of the tool 200 is slightly greater than the distance of the second Branch or branch point 221. Correspondingly, the geometric lengths of the connection channels of the second type 220a, 220b to the radially outer cutting elements 218a, 218b greater than the lengths of the connecting channels of the first type 216a, 216b to the radially inner cutting elements of the first kind 214a, 214b ,

For equalizing the response times and for equalizing the different geometric path lengths of the supply paths for the coolant and lubricant to the cutting elements 214a, 214b of the first cutting group 214 with respect to the lengths of the supply paths to the cutting elements of the second type 218a of the second cutting group 218, the flow cross sections, in particular the diameters of the connecting channels of the second type 220a, 220b designed to be larger than the flow cross sections of the connecting channels of the first type 216a, 216b to the respective cutting elements of the first type 214a, 214b of the first cutting group 214. As a further measure for compensating the different geometric path lengths and for matching the Response times, the flow cross-section of the second flow channel 219 is selected to be greater than the flow cross-section or diameter of the first flow channel 215th These inventive principles of the structural design of the supply paths of the first and second type of Figure 4A can be transferred to the coolant and lubricant channel system of the tool shown in Figure 4B. However, the tool 300 shown in FIG. 4B differs from the tool 200 shown in FIG. 4A in that the first cutting group 314 is formed on a separate insertion part 344 that can be inserted detachably with the tool 300. The insert part 344 is received in an axial receiving bore 338 formed in the end face 324. The insert part 344 has on its outer shell surface an external thread 346 which engages in an internal thread 342 of the receiving bore 338, so that the insert part 344 can be screwed into the receiving bore 338 and out. The one, in the proper installed state front end of the insert 344 is equipped with a centering tip 326 and carries the first cutting group 314. The opposite, in the installed state of the insert 344 rear end 348 is substantially conical and ends at one of the rear end forming seat tip 350 formed. The first flow channel 315 is coaxial with the axis of rotation 312 of the tool 300 and the axis of symmetry or screw axis of the insert 344 and merges with the seat tip 350 in the insert 344 and further extends in the direction of the front end close to cutting elements 314a, 314b first kind.

In a portion adjacent the conical formation, the insert 344 is tapered with respect to the adjacent portion extending to the forward end and carrying the male thread 346, such that when the insert 344 is installed in the receiving bore 338, there is an annular clearance (annulus 339) is formed. From this annular space branch the connection channels 320a, 320b to the cutting elements 318a, 318b of the second cutting group 318 in an oblique direction. A cone-shaped sealing seat 340 is formed around the mouth of the first flow channel 315 into the receiving bore 338, against which a portion of the rear end 348 strikes, thereby sealing the annular space 339 with respect to the first flow channel 315. The annulus 339 is in fluid communication with the second flow channel 319 and forms the second branch point 321 associated with the second blade group 318. This embodiment with the insert 344 and the annular space 339, the second branch or Branching point 321 forms, allows a symmetrical or similar design of the connection channels of the second type 320a, 320b with respect to their length, their flow cross-section and their branch angle and allows the response times of the cutting elements of the second type 318a, 318b are largely equal to each other, although the second Flow channel 319 is not centered or coaxial in the tool 300 runs.

The tool 400 shown in Figure 5 has two groups of blades 414, 418, which can be supplied by two individual flow channels 415, 419, and two individual branch and branch points 417, 421 independently or individually with coolant and lubricant, and accordingly the embodiments of the tool shown in Figures 1 D, 1 F and 2A. The tool 400 includes a first tool part 404 releasably disposable in an axial direction of the front portion of the tool 400 and supporting the first-type cutting elements 414a, 414b of the first cutting group 414, and a second tool part 406 formed in one axial direction rear portion of the tool 400 can be arranged and that carries the cutting elements of the second type 418a, 418b of the second cutting group 418.

The first tool part 404 is connectable to the second tool part 406. For this purpose, the first tool part 404 has a tapered, in the assembled state towards the rear end of the tool 400 extending axial extension 462, which carries an external thread 464 and the rear end face is formed as an end seat 466. The axial extension 462 is received in a receiving bore 454 which is formed in the end face 424 of the second tool part 406. In the receiving bore 454, an internal thread 456 is formed, in which the external thread 464 of the axial extension 462 can engage, so that the first tool part 404 thereby releasably connected to the second tool part 406 is connected, that the axial extension 462 can be screwed into the receiving bore 454.

The first flow channel 415 extends from the feed point 402 at the rear (in the figure 5 right and not shown) end portion 402 of the tool part 406 (the tool 400) to the front (in Figure 5 left) end portion of the work Part 406 passes through the axial extension 462 and extends further through the first tool part 404 to the vicinity of the cutting elements of the first type 414a, 414b of the first cutting group 414 at the front end of the first tool part 404. On passing from the second tool part 406 in the first tool part 404th is the first flow channel 415 by means of a seal (O-ring), which is inserted between the end seat of the axial extension 462 and a bottom surface of the receiving bore 454.

In the case of the tool 500 shown in FIGS. 6A to 6B, the basic configuration of the coolant and lubricant channel system formed therein corresponds to the configuration of the channel system in the tools 58 of the embodiments shown in FIGS. 1C, 1E and 2B. The correspondence is that the tool 500 carries two axially staggered blade groups 414, 418, with the first blade group 514 located farther from the rear end of the tool 500 than the second blade group 518, the second blade group 518 having a second branch and branching point 521 which is in fluid communication via a second flow channel 519 with the feed point 502 (transfer section) located at the rear end of the tool 500, and wherein a first branch point 517 associated with the first cutting group 514 is downstream of the second branch or branch point 521 is arranged and a first flow channel 515 fluid communication between the first and the second branch point or branch 517 and 521 is formed.

To match the response times of the first type cutting elements 514a, 514b to the response times of the second type cutting elements 518a, 518b and to compensate for the different geometric path lengths of the first and second supply paths to the first type cutting edges 514a, 514b and second type 518a, 518b Supply paths of the first and second type designed as follows constructively: The flow cross-sections (diameter) of the connection channels of the first type 516a, 516b are greater than the flow cross-sections (diameter) of the connection channels of the second type 520a, 520b. Furthermore, the lengths of the first-type connection channels 516a, 516b are shorter than the lengths of the connection channels 520a, 520b. Finally, the flow cross section of the first flow channel 515 is chosen as large as possible. Also, the branch portions of the first-type connection channels 516a, 516b may be disconnected from the first branch line 516a, 516b. Branch point 517 thereby larger than the branch portions of the second type connection channels 520a, 520b from the second branch point 521, when the branch angles A516 of the first type connection channels 516a, 516b are set smaller than the branch angles A520 of the second type connection channels 520a, 520b ,

The system tool 600 shown in FIG. 7 includes a tool holder 606 and a tool 604. The tool holder 606 comprises in substantial one-piece construction a coupling portion 670 configured in a manner known to those skilled in the art and for coupling to a powered drive coupling of a machine tool (not shown) serves a chuck body 660 having an enlarged outer diameter adjoining the coupling portion 670 and a tool receiving portion 662 adjoining the chuck body 660 which is penetrated by a receiving opening 666 for receiving a shank portion 638 of the tool 604 and in which a system of FIG In the circumferential direction around the receiving opening 666 arranged system of clamping jaws 656 serves for releasably clamping the shaft portion 638 and is formed in a manner known to those skilled. The tool holder 606 is penetrated in its entire longitudinal extent along the axis of rotation 612 by openings, namely from the already mentioned receiving opening 666 for receiving the shank portion 638, which extends from an end face 664 of the tool receiving portion 662 in the direction of the coupling portion 670, a through An opening 668 which has a larger diameter than the receiving opening 666 and immediately adjacent to the coupling end of the receiving opening 666 and extends into the chuck body 660, an extension opening 672, which has an even larger diameter than the through hole 668 and directly to the Through opening 668 connects, and a coupling opening 673, which adjoins directly to the expansion opening 672 and extending from the tool holder body 660 to the machine tool side (in the figure 7 right) end of the tool holder 606. The coupling opening 673 has a standardized cross-sectional profile, which is designed for coupling with the drivable coupling portion of the machine tool in a manner known to those skilled in the art. In the through hole 668, the extension opening 672 and a part of the coupling hole 673, a kit of insertable parts is arranged. This kit comprises a stop sleeve 690, which is insertable in the passage opening 668 and a in the inserted state the front (left in Figure 7) end portion of the tool holder 606 facing head 694 and a tapered outer diameter and extending in the direction of the coupling portion 670 tubular extension 692 has, a connecting part 684, which is also disposed in the through hole 668 and a pipe socket 692 of the stop sleeve 690 insertable pipe socket 686 and an adjoining this in the axial direction of the flute 688 with extended outer diameter, a coupling sleeve 676, with a strikes frontal abutment surface on the flange 688 of the connecting part 684 and extends from there, starting through the expansion opening 672 into the coupling opening 673. The coupling sleeve 676 includes an enlarged outer diameter annular collar 678 disposed in the expansion opening 672 and an otherwise substantially cylindrical end portion 682. The coupling sleeve 676 is penetrated in its entire axial length by a coaxial sleeve channel 677 located at the coupling end of the coupling sleeve 676 has a cone-shaped extension (not designated), which is designed for connection to a complementary coupling portion of a coolant and lubricant supply line 33 guided through the drive coupling of the machine tool (not shown). At this conical enlargement, the transfer of the coolant and lubricant from the coolant and lubricant supply line 33 (see FIG. 1A) into the coupling sleeve 676 of the tool holder 606 takes place.

The kit further comprises a compression spring 658, which is slid over the tube extension 692 of the stop sleeve 690 and which at its one (left in Fig. 7) end of the head 694 of the stop sleeve 690 and at the other (in Fig. 7 right) End supported on the flute 688 of the connecting part 684. The compression spring 658 causes the stop sleeve 690 is pushed with its head 694 against the rear (in Fig. 7 right) end of the tool 604 and the shaft portion 638 and abuts there and seals the central channel of the cooling and lubricant supply. The compression spring 658 also causes the coupling sleeve 676 with its end portion 682 in the direction of the drive coupling of the machine tool (not shown) (ie in 7) to the right), so that the conical extension of the axial coolant and lubricant channel at the coupling end of the end portion 682 is pressed against a complementarily shaped end portion (not shown) of the coolant and lubricant supply line 33 (see FIG. 1A) and there, ie at the feed point 34, 602 seals.

The tool 604 includes a first tool portion 604a extending from its forward end portion 622, which is formed as a drill, and an axially adjacent second tool portion 604b formed as a shaft portion 638 having standard geometric dimensions and for receiving in the Receiving opening 666 of the tool receiving portion 662 of the tool holder 606 is used.

In the system tool 600 shown in FIG. 7, a cooling and lubricant passage system having a basic structure corresponding to that of the cooling and lubricating passage system of the system tool 50 shown in FIG. 1B according to the second embodiment is formed to supply the system tool serves on the system tool 600 arranged groups of blades. A first cutting group 614 having two first-type cutting elements 614a, 614b is formed at the front end portion 622 of the first tool-part portion 604a. A second cutting group 618 with two (or more) cutting elements of the second type 618 a, 618 b is formed on the end face 664 of the tool receiving section 662 of the tool holder 606. Associated with the first cutting group 614 is a first branching point 617 which is formed at the rear end (in the right-hand end of FIG. 7) of the tool-part section 604b or the shaft section 638. From the first branching or branching point 617, connecting channels of the first type 616a, 616b assigned to the respective cutting elements of the first type 614a, 614b extend through the second and the first tool part sections 604b, 604a. In the second tool part section 604b, the first-type connection channels 616a, 616b are formed as linear sub-channels 615b (first linear sub-channel 615b 'and second linear sub-channel 615b ") and helical sub-channels 615a (first helical sub-channel 615a' and second helical in the first tool subsection 604a Partial channel 615a ") formed. The second cutting group 618 is a second branch point 621, which is arranged in the passage opening 668, more precisely within the axially displaceably mounted therein stop sleeve 690. From the second branching or branching point 621, connecting channels of the second type 620a, 620b, which are assigned to the respective cutting elements of the second type 618a, 618b, extend obliquely through the tool receiving section 662. In the head 694 of the stop sleeve 690 branch bores 696a, 696b are formed, which can extend in an oblique or radial direction and the second-port connecting channels 620a, 620b are assigned or this continue into the stop sleeve 690 passing through axial bore, and a fluid communication of the second branch or branch point 621 in the connection channels of the second type 620a, 620b produce. A second flow channel 619 extends from the feed end 34, 602 at the coupling end of the coupling sleeve 676, through the coupling sleeve 676, connector 684 and stop sleeve 690, and provides fluid communication from the feed point 34, 602 to the second branch point 621 in the head 694 of the stop sleeve 690 and to the first branch or branch point 617 at the rear (in Fig. 7 right) end of the shaft portion 628 ago. A first flow channel 615 extends from the second branch point 621 in the stop sleeve 690 to the first branch point 615 and establishes fluid communication between these points 621, 615. The first type connecting channels 616a, 616b associated with the cutting elements of the first type 614a, 614b are in the form of the subchannels 615a (first and second linear subchannels 615a ', 615a ") and the subchannels 615b (first and second helical subchannels 615b', 615b") educated.

For matching the response times of the cutting elements of the second type 614a, 614b and the cutting elements of the second kind 618a, 618b, the constructional configurations of the supply paths of the first type, ie in particular the structural configurations of the first branch point 617, of the first-type connection channels 616a, 616b (FIG. ie, the linear sub-channels 615b and the helical sub-channels 615a), in relation to the structural configurations of the second-type supply paths, ie here the structural configurations of the second branch point 621, the branch bores 696a, 696b and the second-type port channels 620a, 620b coordinated. Specifically, the flow cross sections, ie the diameters of the linear sub-channels 615b and the helical sub-channels 615a designed to be significantly larger than the flow cross sections (diameter) of the connecting channels of the second type 620a, 620b and the flow cross sections (diameter) of the branch bores 696a, 696b. Furthermore, it is provided that the through-holes 696a, 696b open into a ring cavity 698, this annular cavity 698 making fluid communication with the second-type connecting channels 620a, 620b, but the spreading of the coolant and lubricant when switching on the cooling and

Lubricant supply through the annular cavity 698 retarded into the second type connection channels 620a, 620b delayed.

With reference to Figs. 8 to 10 further embodiments of the shank tool according to the invention are described, which come close to the variant of FIG. 3.

The tool according to FIG. 8 is equipped as a stepped drilling tool with a front cutting group 714 and an offset rear cutting group 718, the latter being formed by four cutting inserts which are axially relatively close to each other. In order that the cutting inserts 714 and 718, which at the same time act as cutting tools during use of the tool, can be supplied in time with sufficient lubricating coolant, the blade groups 714 and 718 are supplied individually. The internal flow channels 715 and 719 extend parallel to the axis, wherein a same inner diameter is provided. Both flow channels are closed at the front.

The connecting channel 716 for the axially forward cutting 714 has a larger diameter than the connecting channel 720 for the cutting 718th

In the event that each cutting group 714, 718 has only one cutting insert, a single connection channel 716 or 720 suffices, with each connection channel being connected to its own flow channel 715 or 719.

In the case of diametrically opposed cutting edges 714 and 718, different variants are conceivable for uniform supply of cooling / lubricant to the cutting groups. According to a first variant, which is shown in Fig. 9, in addition to the connecting channel 716, which is directed to the cutting insert 714A, another connecting channel 716 * is provided, which is angularly guided in such a way (for example by appropriate attachment of holes, which closed externally) that the coolant is dressed in the same direction on the cutting insert 714B. In order to even out the response times of the coolant supply for the cutting inserts 714A and 714B, the diameter D716 ^{* is kept} larger than the diameter of the connection channel 716.

Notwithstanding this variant, the embodiment according to FIG. 10 is equally suitable for supplying the blade groups 714 and 718 with the same response with MQL fluid. According to this variant, the flow channels 715 and 719 are guided parallel to one another up to the end face of the stepped drilling tool and closed there. For the forward cutting inserts 714A and 714B, branched-out connection channels 716A and 716B branch off point symmetrically in diameter. Axially offset branches from the flow channels 715 and 719 connecting channels 720A and 720B, whose diameter is smaller than the diameter of the connecting channels 716A and 716B.

Of course, the flow channels 715 and 719 are closed at the front.

LIST OF REFERENCES:

10 tool machining system

20 Coolant and lubricant preparation

22 air

24 air line

26 oil supply

28 oil supply line

30 oil-air mixers

2 Coolant and lubricant supply 3 Coolant and lubricant supply line 4 Infeed point

0 machine tool

2 drive coupling

4 rotation axis

0 system tool

2 tool holders

4 coupling section

6 receiving section

8 tool

0 shaft section

2 working section

4 first cutting group

4a cutting element of the first kind

4b cutting element of the first kind

6 first flow channel

8 first branch or branch point 0a connection channel of the first kind

0b connection channel of the first kind

4 second cutting group

4a cutting element of the second kind

4b cutting element of the second kind

6 second flow channel second branch or Branweigungsstellea connection channel of the second kind

b Connection channel of the second type

third cutting group

a cutting element third type

b cutting element third type

third flow channel

third branch or branch point of connection channel third type

b Third-party connection channel

Central channel

Transfer section

0 tool

2 feed-in point

2 rotation axis

4 first cutting group

4a cutting element of the first kind

4b cutting element of the first kind

5 first flow channel

6a connection channel of the first kind

6b connection channel of the first kind

7 first branch point or branch point 8 second cutting group

8a cutting element of the second kind

8b cutting element of the second kind

9 second flow channel

0a connection channel of the second kind

0b connection channel of the second kind

1 second branch point 2 front end

4 face

6 center point

8 frontal outlet 132 narrowing

134 closure

136 rear end area

138 endface

140 shoulder

142 open space

144 shoulder

146 chip clearance

D115 Diameter of the first flow channel

D1 19 diameter of the second flow channel

D1 16 Diameter of the connection channel of the first type

A1 16 Branch angle of the connection duct of the first kind

D120 Diameter of the connection channel of the second type

A120 Branch angle of the connection channel of the second type

200 tools

202 feed-in point

212 axis of rotation

214 first cutting group

214a cutting element of the first kind

214b cutting element of the first kind

215 first flow channel

216a connection channel of the first kind

216b connecting channel of the first kind

217 first branch or branch point

218 second cutting group

218a cutting element of the second kind

218b cutting element of the second kind

219 second flow channel

220a connection channel of the second kind

220b connection channel of the second kind

221 second branch or branch point

222 front end

224 face centering

frontal exit

shutter

rear end area

Tool

infeed

axis of rotation

first cutting group

a cutting element of the first kind

b cutting element of the first kind

first flow channel

a connection duct of the first type

b Connection channel of the first type

first branch or branch point second cutting group

a cutting element of the second kind

b cutting element of the second kind

second flow channel

a connection channel of the second kind

b Connection channel of the second type

second branch point or branch point front end

face

centering

frontal exit

rear end area

location hole

annulus

sealing seat

inner thread

insert external thread

rear end

seat tip

Tooling system

infeed

first tool part

second tool part

axis of rotation

first cutting group

a cutting element of the first kind

b cutting element of the first kind

first flow channel

' first section

" second part

a connection duct of the first type

b Connection channel of the first type

first branch or branch point second cutting group

a cutting element of the second kind

b cutting element of the second kind

second flow channel

a connection channel of the second kind

b Connection channel of the second type

second branch point or branch point front end

face

rear end area

shoulder

face

location hole

inner thread

seat

poetry 462 Axial process

464 external thread

466 End seat

500 tool

502 feed-in point

512 axis of rotation

514 first cutting group

514a cutting element of the first kind

514b cutting element of the first kind

515 first flow channel

516a connection channel of the first kind

516b connection channel of the first type

517 first branch or branch point

518 second cutting group

518a cutting element of the second kind

518b cutting element of the second kind

519 second flow channel

520a connection channel of the second kind

520b connection channel of the second kind

521 second branch or branch point

522 front end

524 face

526 centering point

528 front-side outlet

536 rear end area

538 endface

540 shoulder

544 shoulder

546 chip clearing area

D515 Diameter of the first flow channel

D529 Diameter of the second flow channel

D516 Diameter of the connection duct of the first type

A520 Branch angle of the connection duct of the first kind D520 Diameter of the connection channel of the second type

A520 Branch angle of the connection channel of the second kind

600 system tool

602 feed-in point

604 tool

604a tool section

604b tool section

606 tool holder

612 axis of rotation

614 first cutting group

614a cutting element of the first kind

14b cutting element of the first kind

15 first flow channel

15a subchannel

15a 'first subchannel

15a "second subchannel

15b subchannel

15b 'first subchannel

15b "second subchannel

16a connection channel of the first kind

16b connection channel of the first kind

17 first branch or branch point 18 second cutting group

18a cutting element of the second kind

18b cutting element of the second kind

19 second flow channel

20a connection channel of the second kind

20b connection channel of the second kind

21 second branch or branch point 22 front end portion

36 rear end portion

38 shaft section

56 jaws compression spring

Toolholder body

Tool receiving portion

face

receiving opening

Through opening

coupling section

extension opening

coupling opening

annular recess

coupling sleeve

sleeve collar

collar

seal

end

connecting part

pipe extension

flange

stop sleeve

pipe extension

head

a branch hole

b branch hole

ring cavity

first cutting group A cutting insert

B cutting insert

first flow channel

connecting channel

* Connection channel

second cutting group A cutting inserts

B cutting inserts second flow channel, A, B connection channel

Claims

claims

A system tool (50), in particular a shaft tool, for rotating, machining a workpiece, for coupling to a machine tool (40) driving the rotation of the system tool, and for connection to a coolant and lubricant supply (32), comprising:

a first cutting group (64) having at least one first type cutting element (64a, 64b) and a second cutting group (74) having at least one second type cutting element (74a, 74b), each second type cutting element (74a, 74b) relative to each Cutting element of the first type (64a, 64b) is arranged offset in an axial and / or radial direction of the system tool (50),

a feed point (34) for feeding a, in particular from the coolant and lubricant supply (32), supplied coolant and lubricant,

a coolant and lubricant passage system formed within the system tool (50) for distributing the coolant and lubricant from the feed point (34) to each of the first and second cutting elements (64a, 64b, 74a, 74b), comprising:

one of the first cutting group (64) associated, first branch or branch point (68) for branching coolant and lubricant from the cooling and lubricant channel system, and for each cutting element of the first kind (64a, 64b), a first associated with this connection channel (70a, 70b) providing fluid communication from said first branching point (68) to said cutting element (64a, 64b), such that for each cutting element of first type (64a, 64b) a supply path of the first type is formed which establishes fluid communication from the feed point (34) via the first branch or branch point (68) through the first type connection channel (70a, 70b) associated with this cutting element (64a, 64b),

one of the second cutting group (74) associated second branch. Branching point (78), and for each cutting element of the second kind (74a, 74b), a second type associated connection channel (80a, 80b), which fluid communication from the second branch point (78) to this cutting element (74a, 74b ), so that for each cutting element of the second type (74a, 74b), a supply path of the second type is formed, which is a fluid communication of the Feed point (34) via the second branch or branch point (78) by the this cutting element (74a, 74b) associated connection channel of the second type (80a, 80b),

wherein the constructive configurations of the supply paths of the first kind and the structural configurations of the supply paths of the second type are chosen or designed such that the response time of the supply of the cutting elements of the first type (64a, 64b) and the response time of the supply of the cutting elements of the second type (74a, 74b ) are substantially matched to each other with coolant and lubricant.

2. System tool (50, 600) according to claim 1,

this tool having a tool holder (52, 606) which can be connected in a rotationally fixed manner to a rotatable drive coupling (42) of the machine tool (40) and a tool (58, 604) which can be connected in a rotationally fixed manner to the tool holder (52, 606),

wherein the feed point (34) is arranged in a coupling section (54) of the tool holder (52) provided for coupling with the drive coupling (42) of the machine tool (40),

wherein the coolant and lubricant channel system includes a transfer section (94) for passing coolant and lubricant from the tool holder (52) to the tool (58) and a center channel (92) providing fluid communication from the feed point (34) to the transfer section (94) , comprises,

wherein the first cutting group (64, 614) and each connecting channel of the first type (70a, 70b, 616a, 616b) are arranged in the tool (58, 604),

wherein the second cutting group (74, 618), the second branching point (78) and each connecting channel of the second type (80a, 80b, 620a, 620b) are arranged in the tool holder (52, 604), and the second branching Branching point (78) on or in fluid communication with the central channel (92, 616 ').

The system tool of claim 2, wherein the first branch point (68) is located downstream of the transfer section (94) and in the tool (58), a first flow channel (66) provides fluid communication from the transfer section (94) the first branch or branch point (68) produces, and wherein the structural configurations of the central channel (92) in its portion from the second branch point (78) to the transfer section (94), the transfer section (94), the first flow channel (66), the first branch or branch point (68) and the connection channels of the first type (64a, 64b) in relation to the structural configurations of the second branch or branch point (78) and the connection channels of the second type (80a, 80b) are matched to one another such that the response times of the supply Cutting elements of the first type (64a, 64b) and the supply of cutting elements of the second type (74a, 74b) with the coolant and lubricant are substantially equal to each other.

4. System tool (50, 600) according to claim 2, wherein the first branch point or branch point (68) at a rear end portion of the tool (58, 604) is arranged and coupled to the transfer section (94), and

wherein the constructional configurations of the central channel (92) in its section from the second branch point (78) to the transfer section (94), the first branch point (68) and the connection channels of the first type (70a, 70b, 616a, 616b) in relation to the structural configurations of the second branch point or branch point (78) and the connection channels of the second type (80a, 80b, 620a, 620b) are matched to one another such that the response times of the supply of the cutting elements of the first type (64 , 64b, 618a, 618b) and the supply of the cutting elements of the second type (74a, 74b, 620a, 620b) are substantially equalized with the coolant and lubricant.

5. System tool according to one of claims 2 to 4,

wherein configurable parameters of the constructive configuration of the first supply paths comprise at least one of the following:

the length and the flow cross-section, in particular the diameter, of the section of the central channel (92) from the second branch point (78) to the transfer section (94),

the length and the flow cross-section, in particular the diameter, of a respective connection channel (70a, 70b) of the first kind, and a branch share, in particular a branch angle, of a respective connection channel (70a, 70b) of the first kind at the first branch or branch point (68), and as well

in particular in the configuration of the tool according to (58) according to claim 3, the length and the flow cross-section, in particular diameter, of the first flow channel (66), and

wherein configurable parameters of the structural design of the second supply paths comprise at least one of the following:

the length and the flow cross-section, in particular the diameter, of a respective connection channel of the second kind (80a, 80b), and

a branch portion, in particular a branch angle, of a respective connection channel of the second type (80a, 80b) at the second branch or branch point (78).

6. System tool according to claim 1,

the latter comprising a tool holder (52) which can be connected in a rotationally fixed manner to a rotatable drive coupling (42) of the machine tool (40) and a tool (58, 100-500) which can be connected in a rotationally fixed manner to the tool holder (52),

wherein the first cutting group (64, 1 14-514), the first branching and branching point (68, 117-517) and each connecting duct of the first kind (70a, 70b, 16a-516a, 16b-516b) are arranged in the tool are and

wherein the second cutting group (74, 1 8-518), the second branching point (78, 121-521) and each connecting channel of the second kind (80a, 80b, 120a-520a, 120b-520b) are arranged in the tool ,

7. System tool according to claim 6, wherein the second branching point (78, 121-421) is located downstream of the transfer section (94) and a second flow channel (76, 119-419) provides fluid communication from the transfer section (94) to the second branch or branching point (78, 121-421),

wherein the first branching point (68, 117-417) is located downstream relative to the second branching point (78, 121-421), and a first flow channel (66, 15-415) provides fluid communication of the second branching point (78, 121-421) to the first branching point (68, 117-417), and

wherein the structural configurations of the first flow channel (66, 1 15- 415), the first branch point (68, 1 17-417) and the connection channels of the first kind (70a, 70b, 116a-416a, 116b-416b) in Reference is made to the structural design of the second branch or branch point (78, 121-421) and the connection channels of the second type (80a, 80b, 120a-420a, 120b-420b) to one another such that the response times of the supply of the cutting elements first cutting group (64, 1 14-414) and the cutting elements of the second cutting group (74, 118-418) with the coolant and lubricant are substantially equal to each other.

8. System tool according to claim 6,

wherein the second branching point (78, 521) is located downstream relative to the transfer section (94) and a second flow channel (76, 519) provides fluid communication from the transfer section (94) to the second branching point (32). 78, 517),

wherein the first branching point (68, 517) is located downstream with respect to the transfer section (94) and farther therefrom

spaced apart as the second branching point (78, 521), and wherein a first flow channel (66, 515) provides fluid communication from the transfer section (94) to the first branching point (68, 517),

wherein the constructive configurations of the first flow channel (68, 515), the first branch point (68, 517) and the connection channels of the first type (70a, 70b, 520a, 520b) with respect to the structural configurations of the second flow channel (78 , 519), the second branch point (78, 521) and the connection channels of the second type (80a, 80b, 520a, 520b) are coordinated so that the response times of the supply of the cutting elements of the first

Cutting group type (64, 514) and the supply of the cutting elements of the second cutting group type (74, 518) with the coolant and lubricant are substantially equal to each other.

9. System tool according to one of claims 6 to 8,

wherein parameters of the design of the first supply paths include the following:

the length and the flow cross-section, in particular the diameter, of the first flow channel (68),

the length and the flow cross-section, in particular the diameter, of a respective connection channel (70a, 70b) of the first kind, and

a branch portion, in particular a branch angle, of a respective connection channel (70a, 70b) of the first type at the first branch or branch point (68), and

wherein parameters of the design of the second supply paths include the following:

the length and the flow cross-section, in particular the diameter, of the second flow channel (78),

10. System tool according to one of claims 1 to 9, comprising:

a third cutting group (84) disposed on the tool (58) and having at least one third-type cutting element (84a, 84b), each third cutting element (74a, 74b) relative to each first-type cutting element (64a, 64b) ) and offset relative to each second type cutting element (74a, 74b) in an axial and / or radial direction of the system tool (50),

the coolant and lubricant channel system further comprising: a third branch or branching point (88) associated with the third cutting group (84) for branching off coolant and lubricant from the cooling and lubricant channel system, and for each third-type cutting element (84a, 84b), a third connecting channel associated therewith (90a, 90b) providing fluid communication from said third branching point (88) to said cutting element (84a, 84b) such that for each third type cutting element (84a, 84b) a third type supply path is formed establishing fluid communication from the feed point (34) via the third branch or branch point (88) through the third type connection channel (90a, 90b) associated with this cutting element (84a, 84b),

wherein the constructive configurations of the supply paths of the first and second type and the constructive configurations of the supply paths of the third type are chosen so that the response times of the supply of the cutting elements of the first kind (64a, 64b), the cutting elements of the second type (74a, 74b) and the cutting elements third Art (84a, 84b) with coolant and lubricant are substantially aligned with each other.

The system tool of claim 10, wherein the third branch point (78) is located downstream relative to the transfer section (94), and a third flow channel (86) provides fluid communication from the transfer section (94) to the third branch line (94) Branching point (88) produces,

wherein the first branching point (68) is located downstream of the third branching point (88) and a first flow channel (66) is in fluid communication from the third branching point (88) to the first branching point (88) Branching or branching point (68) manufactures, and wherein the structural configurations of the first flow channel (68), the first branch or branch point (68) and the connection channels of the first kind (70a, 70b) with respect to the structural embodiments of the third Branching or branching point (88) and the connection channels of the third type (90a, 90b) are coordinated so that the response times of the supply of the cutting elements of the first kind (64, 64b) and the cutting elements of the third type (84a, 84b) with the cooling - and

Lubricants are substantially aligned with each other.

The system tool of claim 10, wherein the third branch point (88) is located downstream relative to the transfer section (94) and a third flow channel (86) provides fluid communication from the transfer section (94) to the third branch line (94) Branching point (88) produces,

wherein the first branching point (68) is located downstream of and spaced farther from the transfer section (94) than the third branching point (88), and wherein a first flow channel (66) provides fluid communication from the first branch passage (68) Transfer point (94) to the first branch. Branching point (68),

wherein the structural configurations of the first flow channel (66), the first branch or branch point (68) and the connecting channels of the first kind (70a, 70b) with respect to the structural design of the third flow channel (86), the third branch or Branching point (88) and the connection channels of the third type (90a, 90b) are coordinated so that the response times of the supply of the cutting elements of the first type (64, 64b) and the cutting elements of the third type (84a, 874b) with the coolant and lubricant in Are substantially aligned with each other.

13. Tool (58, 100-500), in particular shank tool, for rotating, machining a workpiece and for connection to a coolant and lubricant supply (32) via a transfer section (94) having a feed point (34) of cooling and Lubricating forms in this tool, and in particular for coupling to a tool holder (52) driving the rotation of the tool in a system tool according to claim 1, comprising:

a first cutting group (64, 1 14-514) having at least one cutting element of the first type (64a, 64b, 1 14a-514a, 114b-514b) and a second cutting group (74, 1 18-518) having at least one cutting element of the second type ( 74a, 74b, 118a-518a, 118b-518b), wherein each second type of cutting element is offset with respect to each first type of cutting element in an axial and / or radial direction of the tool,

a coolant and lubricant channel system formed within the tool for distributing the coolant and lubricant from the feed point (34) to each of the first and second type cutting elements, comprising: one of the first cutting group (64, 114-514) associated first branch point (68, 17-517) for branching coolant and lubricant from the cooling and lubricant channel system, and for each cutting element of the first kind (64a, 64b , 114a-514a, 514b-514b), a first type of connection channel (70a, 70b, 116a-516a, 116b-516b) associated therewith which establishes fluid communication from the first branch point to that cutting element, such that for each Cutting element of the first kind a supply path of the first type is formed, which establishes a fluid communication from the feed point (34) via the first branch or branch point by the said connecting element associated connection channel of the first kind,

one of the second cutting group (74, 118-518) associated, second branch or branch point (78, 121-521), and for each cutting element of the second kind (74a, 74b, 118a-518a, 118b-518b), an associated with this Secondary port (80a, 80b, 120a-520a, 120b-520b) providing fluid communication from the second branch point to this cutting element such that for each second type of cutting element there is formed a second type of supply path providing fluid communication from the feed point (34) via the second Abzweigbzw. Branching point produced by this cutting element associated connection channel of the second kind,

wherein the structural configurations of the supply paths of the first kind and the constructive configurations of the supply paths of the second type are selected such that the response times of the supply of the cutting elements of the first type and the cutting elements of the second type are substantially equalized with coolant and lubricant.

14. Tool (58, 100-400) according to claim 13,

wherein the second branch point (78, 121-421) is located downstream of the feed point (34) and a second flow channel (76, 119-419) provides fluid communication from the feed point (34) to the second branch point. or branch point (78, 121-421),

wherein the first branch point (68, 117-417) is downstream with respect to the feed point (34) and further apart therefrom than the second branch point (78, 121-421) and a first flow channel (66, 115-415) establishes fluid communication from the feed point (34) to the first branch point (68, 117-417),

wherein the structural configurations of the first flow channel (66, 1 15-415), the first branch point (68, 117-417) and the first type of connection channels (70a, 70b, 116a-416a, 116b-416b) with respect to the constructive embodiments of the second flow channel (76, 119-419), the second branch or branch point (78, 121-421) and the connection channels of the second type (80a, 80b, 120a-420a, 120b-420b) so matched in that the response times of the supply of the cutting elements of the first type and of the cutting elements of the second type are substantially equalized with the coolant and lubricant.

15. Tool (58, 500) according to claim 13,

wherein the second branch point (78, 521) is located downstream of the feed point (34) and a second flow channel (76, 520) provides fluid communication from the feed point (34) to the second branch. Branching point (78, 521),

wherein the first branching point (68, 517) is located downstream relative to the second branching point (78, 521), and a first flow channel (66, 516) provides fluid communication from the second branching point. Branching point (78, 521) to the first branch or branch point (68, 517) produces, and

wherein the structural configurations of the first flow channel (68, 515), the first branch or branch point (68, 517) and the connection channels of the first type (70a, 70b, 516a, 516b) in relation to the structural configurations of the second branch or 6. Branching point (78, 521) and the connecting channels of the second type (80a, 80b, 520a, 520b) are matched to one another in such a way that the response times of the supply of the cutting elements of the first type and of the cutting elements of the second type are substantially equalized with the coolant and lubricant are.

16. Tool according to one of claims 13 to 15,

wherein parameters of the structural design of the first supply paths comprise at least one of the following: the length and the flow cross-section, in particular the diameter (D115) of the first flow channel (115),

the length and the flow cross-section, in particular the diameter (D 6), of a respective connection channel of the first type (116 a, 116 b), and

a branch portion, in particular a branch angle (A1 16), of a respective connection channel (116a, 16b) of the first kind at the first branch or branch point (17), and

the length and the flow cross section, in particular diameter (D119), of the second flow channel (1 19),

the length and the flow cross-section, in particular diameter (D120), of a respective connection channel of the second type (120a, 120b), and

a branch portion, in particular a branch angle (A120), of a respective connection channel of the second type (120a, 120b) at the second branch or branch point (121).

17. System tool (50) according to claim 8 or tool (58, 100-400) according to claim 14, wherein in the tool (58, 100-400) the flow cross sections of the connecting channels of the first type (70a, 70b, 116a-416a, 16b -416b) are larger than the flow cross sections of the connecting channels of the second type (80a, 80b, 120a-420a, 120b-420b).

18. System tool or tool according to claim 17, wherein in the tool (58, 100-400) the flow cross section of the first flow channel (66, 115-415) is greater than the flow cross section of the second flow channel (76, 119-4 9).

19. System tool or tool according to claim 17 or 18, wherein in the tool (58, 100-400) the lengths of the connection channels of the first kind (70a, 70b, 116a-416a, 16b-1616b16) shorter than the lengths of the connection channels of the second kind (80a, 80b, 120a-420a, 120b-420b).

20. System tool or tool according to one of claims 17 to 19, wherein in the tool (58, 100-400), the branch angle of the connection channels of the first kind (70a, 70b, 116a-416a, 116b-416b) smaller than the branch angle of the connection channels second Art (80a, 80b, 120a-420a, 120b-420b) are.

21. System tool (50) according to claim 7 or tool (58, 500) according to claim 15,

wherein in the tool (58, 500) the flow cross sections of the connecting channels of the first type (70a, 70b, 516a, 516b) are larger than the flow cross sections of the connecting channels of the second type (80a, 80b, 520a, 520b).

The system tool or tool of claim 21, wherein in the tool (58, 500) the lengths of the first type of connection channels (70a, 70b, 516a, 516b) are smaller than the lengths of the second type of connection channels (80a, 80b, 520a, 520b). are.

23. System tool or tool according to claim 21 or 22, wherein in the tool (58, 500), the flow cross section of the first flow channel (68, 515) is greater than the flow cross section of the second flow channel (78, 519).

24. System tool or tool according to one of claims 21 to 23, wherein in the tool (58, 500), the branch angle of the connection channels of the first kind (70a, 70b, 116a-416a, 1 16b-416b) smaller than the branch angle of the connection channels of the second kind (80a, 80b, 120a-420a, 120b-420b).

25. Tool (400) according to any one of claims 14, 16 in the back reference to claim 14, and 17 to 20, wherein the tool is composed of

a first tool part (404) locatable in an axial direction front portion of the tool (400) and on which each cutting element (414a, 414b) of the first cutting group (414) is arranged, and

a second tool part (406), which can be arranged in a rear portion of the tool (400) in an axial direction and with which the first tool part (404), in particular detachably connectable, and to which each cutting element (418a, 418b) of the second cutting group (418) is arranged, and wherein a first portion (415 ') of the first flow channel (415) extends within the first tool portion (404) and is in fluid communication with the cutting elements (414a, 414b) of the first blade set (414), and a second portion (415 "). the first flow channel (415) extends within the second tool part (406) and is in fluid communication with the first section (415 ') through the first type connection channels (416a, 416b), and.

wherein the second flow channel (419) extends within the second tool part (406) and is in fluid communication with the cutting elements (418a, 418b) of the second blade group (418) through the second type connection channels (420a, 420b).

26. Tool (58; 200, 300) according to any one of claims 14, 16 when referred to claim 14, and 17 to 20, wherein the cutting elements (64a, 64b, 214a, 214b, 314a, 314b) of the first cutting group (64, 214, 314) offset radially to the

Cutting elements (74a, 74b, 218a, 218b, 218a, 218b) of the second cutting group (74, 218; 318) and viewed in the axial direction in the vicinity of the cutting elements of the second cutting group, in particular at or in the vicinity of a front end (222, 322) of the tool are arranged.

27. Tool (300) according to claim 26, wherein in an end face (324) at the front end (322) of the tool an axial receiving bore (338) is formed, wherein the cutting elements (318a, 318b) of the second cutting group (318) at the front End (322) of the tool, in particular on the end face (324) of the tool (300), are arranged, wherein the cutting elements (314a, 314b) of the first cutting group (314) on an insert part (344), in particular at its end face, arranged are, and wherein the insert part (344) in the receiving bore (238) detachably insertable, in particular screwed, is.

A system tool according to any one of claims 1 to 12 or a tool as claimed in any one of claims 13 to 27, wherein when the first cutting group (64, 1 14-514) comprises a plurality of first-type cutting elements (64a, 64b; 114a-514a, 114b-514b). has them substantially equally spaced from the feed point (34) in the axial direction and arranged substantially uniformly distributed in a circumferential direction, and wherein when the second cutting group (64, 1 14-514) has a plurality of cutting elements of the second kind (74a, 74b; 1 18a-518a, 1 18b-518b), this substantially from the feed point (34) in the axial direction of the tool are equally spaced and arranged distributed substantially uniformly in a circumferential direction of the tool.

29. System tool or tool according to claim 28,

wherein the structural design of the supply paths of the first kind is selected such that from the cooling and lubricant supply (32) via the feed point (34) provided supply rate of the coolant and lubricant, a predetermined first supply rate of the coolant and lubricant to the first cutting group (64, 114-514), and

wherein the structural design of the supply paths of the second type is selected such that a predetermined second supply part rate of the coolant and lubricant to the second cutting group (74, 1 18-518) is passed from the feed rate provided via the feed point (34).

A system tool or tool according to claim 29, wherein the ratio between the first supply rate and the second supply rate to the functions, in particular e.g. on the removal rates and / or the size and / or the machined dimensions or surfaces of the respective processing region of the cutting elements, the first cutting group (64, 114-514) and the second cutting group (74, 118-518), in particular approximately to the Areas of the respective processing area of the first and second cutting group, is adjusted.

The system tool or tool of claim 29 or 30, wherein the ratio between the first supply sub-rate and the second supply sub-rate is in a range of (1/2 -Δ) to (1/2 + Δ), and

where 0 <A <0.20, more preferably 0 Δ 0.10 and even more preferably 0 <Δ <0.05.

32. System tool or tool according to claim 29 or 30, wherein the ratio between the first supply ungsteilrate and the second supply sub-rate in is a range of (1/3-δ)% to (1/3 + δ)% or in a range of (2/3-δ)% to (2/3 + δ)%, and

where (-1/6) <δ <(+1/6), more preferably (-1/12) <δ <(+1/12) and even more preferably (-0.05) <δ <(+0 , 05).

33. The system tool or tool of claim 28, wherein the tool, together with a certificate created for this system tool or tool, forms a trade item, wherein the certificate contains at least information about the first and the second supply sub-rate.