Machining system

Abstract

A machining system consisting of a holder receptacle (10) and a holder (12) for accommodating a machining tool, said holder having a holder shaft (14) and being exchangeably securable in the holder receptacle (10) by means of a securing device (16), wherein the securing device (16) can be moved by means of an actuating device (18) from a released position into a secured position and vice versa, wherein, when the securing device (16) is in the released position, the holder (12) can be inserted into or removed from the holder receptacle (10), and, when the securing device (16) is in the secured position and the holder (12) has been inserted, the holder (12) is held in the holder receptacle (10) and pulled in with a predeterminable pull-in force, wherein the holder (12) has a clamping cam (19) located on the holder shaft (14), said clamping cam (19) coming into or out of contact with an allocable clamping surface (20) of the securing device (16) for a securing or releasing operation, and wherein the holder receptacle (10) has a flexible compensation device (22) with spring-like elasticity which allows for tolerance compensation between the holder receptacle (10) and the accommodated holder (12) at least in the fixed position.

Description

[0001] 40ilk / 131945AVO

[0002] KOLIBRI BETEILIGUNGSGESELLSCHAFT MBH & CO. KGAA Albert-Einstein-Ring 22, 14532 Kleinmachnow, Germany

[0003] Processing system

[0004] The invention relates to a machining system, comprising at least a holder receptacle arranged in a stationary position during operation and a holder provided for receiving a machining tool, which has a holder shaft and which can be fixed in the holder receptacle in an interchangeable manner by means of a fixing device, wherein the fixing device can be moved from a release position to a fixing position and vice versa by means of an actuating device during a fixing or release process, wherein the holder can be inserted into and removed from the holder receptacle or is held in its inserted position in the holder receptacle and is drawn in with a predefinable pull-in force, and wherein the holder has at least one clamping cam arranged on the holder shaft, which comes into contact with or out of contact with an associated clamping surface of the fixing device for a fixing or release process.Machining systems of various types are known from the prior art. For example, DE 10 2018 007 084 A1 discloses a machining system comprising a tool holder with a stationary insertion element and a drive unit with a insertion element rotatable by means of a insertion device, which can be brought into engagement with the insertion element. The tool holder and the drive unit are each provided with mutually adjacent contact surfaces with a toothed section that can be brought into engagement with each other, the axial distance of which can be reduced by rotating the insertion element by means of the insertion device until they are in contact with each other, thereby allowing the tool holder and the drive unit to be axially clamped against each other. Such tool holders are also referred to in technical language as spindle heads and serve this purpose when mounted in a tool turret.

[0005] (DE 10 2018 004 677 A1 ) to drive a machining tool rotatingly via its tool drive during operation, wherein the disc-shaped tool turret as a whole is pivotable, allowing machining tools arranged on its outer circumference to pivot into a common machining position.

[0006] French patent no. 1 007 956 discloses a shaft of a driven tool holder with two locking or clamping cams diametrically opposed to each other with respect to the longitudinal axis of the holder, which have an axial recess between them directed towards a collar of the holder. Behind the clamping cams, each recess transitions into an undercut into which a locking ring, designed as a crown gear, engages. This locking ring can be pivoted via a bevel gear by means of an actuating device, so that when the tool holder is mounted in an adapter, i.e., a spindle insert, it can be drawn further into the adapter receptacle by means of the rotatable locking ring via inclined clamping surfaces on the two segment-shaped clamping cams.

[0007] Based on this prior art, the invention aims to further improve known machining systems by incorporating a stationary holder for a holder with a cutting tool. A machining system with the features of claim 1 as a whole achieves this objective. According to the characterizing part of claim 1, the holder has a spring-loaded compensating device that, at least in the fixed position, allows for tolerance compensation between the holder and the holder it accommodates, thus creating improved force transmission between the stationary holder and the stationary holder with the cutting tool it accommodates.In particular, tolerance compensation ensures that the same elastic deformation is always achieved during the clamping process for a given type of holder, thus generating a consistently defined clamping force. This improves power transmission with a stationary machining tool, such as a cutting insert, and contributes to relieving stress on components involved in power transmission. Specifically, the holder mount is stationary during operation of the device, for example, in a tool turret mount via a VDI interface, such as VDI40 according to DIN 69880. A rotating drive of the holder mount, holder, and machining tool is not intended in this configuration.

[0008] Overall, this creates a modular interface for clamping a tool holder, which, as a carrier for a machining tool, can also be integrally connected to the cutting tool. Preferably, however, the cutting tool is formed from a type of indexable insert, which is interchangeably fixed to the stationary tool holder via a tool adapter, for example, by a suitable screw connection on an adapter seat of the holder. Due to the aforementioned tolerance compensation between the holder mount and the mounted holder, a reliable connection is ensured in every case by means of the clamping device, even when using different cutting tools with a standardized holder, using the aforementioned machining system.

[0009] In a preferred embodiment of the machining system according to the invention, the compensating device is formed from at least one recess, preferably in the form of a circular arc-shaped annular groove segment, which preferably extends transversely to a longitudinal or insertion axis of the holder in the associated holder receptacle. In this way, the compensating device is integrated directly into the holder receptacle as an integral or one-piece component with minimal machining effort and in a space-saving manner.

[0010] In a further preferred embodiment of the machining system according to the invention, the holder shaft is received in the holder receptacle with a predefinable radial distance, at least in the area of ​​the respective annular groove segment, and is secured in the fixed position for stationary machining by means of at least one locking element that releasably engages in an adjacent annular groove segment, at least against falling out. In this way, one holder can be exchanged for another in the holder receptacle and securely fixed there with minimal effort.

[0011] In a further preferred embodiment of the machining system according to the invention, the holder shaft of the holder widens radially in steps towards a fixing point for the machining tool. A first step rests flush against a shoulder-like recess in the holder receptacle, and a second step rests flush against the free end face of the holder receptacle. This results in an interaction of various defined flat contact surfaces between the holder and the holder receptacle, which contributes to increasing the machining accuracy of the system as a whole. The geometrically stepped arrangement with individual flat contact surfaces between the holder and the holder receptacle generates ideal support for machining tools that can be mounted on a holder, such as indexable inserts in machining engagement as part of an associated adapter.

[0012] In a further preferred embodiment of the machining system according to the invention, the holder receptacle comprises a housing with at least two housing parts that are rigidly connected to one another and rotatably accommodate the locking device between them. Preferably, one housing part has an actuating device for rotating or pivoting the locking device from a release position to the locking position and vice versa, and the other housing part has an interface, in particular a standard interface, on its end face facing away from the locking device. This results in a structurally simple design with few components, thus enabling cost-effective manufacturing of the entire machining system.

[0013] In a preferred embodiment of the machining system according to the invention, it is further provided that, viewed from the axial insertion direction, groups of mounting cams and clamping cams are present on the holder shaft of the holder, separated from one another, which both engage through the associated through-grooves in one housing part, and that in the release position of the locking device, the through-grooves of one housing part are in alignment with further through-grooves in the locking device, which can be traversed by the clamping cams for a locking process of the holder in the holder receptacle, by engaging through them.The mounting cams of the holder shaft, which engage in the associated through-grooves of one housing part between adjacent support ribs of the same, enable secure support during stationary machining with the machining tool, and the clamping cams enable mutual clamping during the fixing process of the holder in the holder receptacle, which will be explained in more detail below.

[0014] For the realization of such a machining system, it is particularly preferred that the locking device comprises a crown gear which has further through-grooves on its inner circumference and which has teeth on at least one free end face that interact with corresponding teeth on the actuating device and which has a clamping surface on its side opposite the respective teeth, which is provided for contact with the respective clamping cam as soon as the crown gear is pivoted from its release position into the locking position by means of the actuating device. Preferably, it is further provided that the respective clamping cam has two different contact surfaces: a ramp for sliding up onto the clamping surface of the crown gear and a flat counter-clamping surface for clamping with the crown gear via its clamping surface.In this way, with minimal effort, the clamping process is initiated when the crown wheel is pivoted from its release to its locking position, and the holder with the respective machining tool is pulled in towards the cylindrical receptacle of the stationary holder receptacle using the aforementioned step.

[0015] Preferably during the fixing process, when the respective clamping cam of the holder slides onto the flat clamping surface of the crown wheel, the compensating device undergoes at least partial deformation, so that any tolerances between the holder and the holder receptacle can be reliably compensated for during the fixing process.

[0016] In a further preferred embodiment of the machining system according to the invention, the gearing of the actuating device comprises at least one, preferably two, pinion drives, which are arranged on two opposite sides (0° / 180°) in the holder receptacle and can be actuated from the outside. In this way, the respective pinion drive for driving the crown gear is securely integrated into the holder receptacle in the form of the first housing part and yet remains easily accessible from the outside for actuation, even when using an automated handling system. In this way, operating errors are effectively prevented. By using two pinion drives, actuating one pinion drive automatically engages the opposite pinion drive as part of the actuation, via the adjacent gearing of the crown gear.

[0017] In a further preferred embodiment of the machining system according to the invention, a cylindrically projecting connection part is formed at the free end face of the holder shaft, opposite the fixing point for the machining tool. This connection part carries a ring seal and is precisely fitted into a hollow cylindrical recess in the holder receptacle at an axial distance. This connection part serves to supply a coolant lubricant via a central coolant channel in the holder. This coolant lubricant exits the holder at a discharge port in the direction of the machining tool. Thanks to this connection part, the holder and the machining tool can be connected to a fluid supply circuit with coolant lubricant in the holder receptacle in a space-saving manner. Particularly in the axial direction, the fluid connection has a compact profile.The invention further relates to a stationary holder mount for a machining system, as described above, wherein the holder mount has a housing consisting of at least two housing parts, between which the pivotable locking device is accommodated. It is also preferably provided that one housing part has the actuating device and the other housing part has a standard interface at its free end for locking the holder mount in a corresponding interface of a tool turret of a machine tool, and that one housing part has the compensation device for the intended tolerance compensation between the holder and the holder mount.

[0018] The machining system according to the invention, including the holder mount, is explained in more detail below using an exemplary embodiment as shown in the drawing. The drawing is a simplified, non-scale representation of the following:

[0019] Figure 1, in the form of an exploded view, shows the essential features.

[0020] Components of the machining system;

[0021] Figure 2 shows a longitudinal section view through a composite machining system according to Figure 1;

[0022] Figure 3 in perspective top view the composite

[0023] Machining system according to Figure 2;

[0024] Figure 4 shows a perspective top view of an end face of a locking device in the form of a crown wheel; and

[0025] Figure 5 shows an enlarged detail, designated X in Figure 1, within a partial circular section depicted with dashed lines. The machining system shown in Figure 1, in the form of an exploded view, consists of a stationary holder receptacle 10 and a holder 12 designed to receive a machining tool (not shown), such as a conventional adapter with or without an indexable insert. The holder 12 has a shank 14 and can be interchangeably locked in the holder receptacle 10 by means of a locking device 16. The locking device 16 can be moved or pivoted from a release position to a locked position and vice versa by means of an actuating device 18 during a locking or release operation, whereby the holder 12 is guided into and out of the holder receptacle 10.The holder 12 is held in its inserted position in the holder receptacle 10 and is drawn in with a predefinable clamping force. For this purpose, the holder 12 in this case has a total of four clamping cams 19 arranged on the holder shaft 14, which are arranged in pairs adjacent to each other and form a common group, with each clamping cam 19 coming into contact with or out of contact with an associated clamping surface 20 of the clamping device 16 on its rear side for a clamping or release operation, as shown in particular in the longitudinal section view of Figure 2. For this purpose, the holder receptacle 10 has a spring-elastic compensating device 22, as shown in particular in Figures 1 and 2, which allows for tolerance compensation between the holder receptacle 10 and the received holder 12, at least in the clamping position.Furthermore, the holder 12 has a plate-shaped receptacle 24 on its front free end face for receiving an adapter (not shown) for a conventional indexable insert, the effective cutting edge of which, which can be engaged with a workpiece for machining (not shown), lies on a fictitious circumferential circle that is arranged outside a circumferential edge of the head geometry of the cylindrical holder 12. The holder receptacle 10 thus represents the tool insert for a stationary, non-driven interface in a tool turret (not shown). In this respect, the stationary machining system according to Figure 1 provides a modular interface for fixing a machining tool on the holder 12.A conventional locking screw of a threaded connection serves to hold the replaceable adapter (not shown) for an indexable insert; only the threaded bore 25 in the receptacle 24 is shown in Figures 1 and 3. A preferably flat guide 26 on the free end face of the otherwise essentially cylindrical head geometry of the holder 12 serves to remove chips from the indexable insert.

[0026] As can be seen from Figures 1 and 2, the compensating device 22 has at least one groove-shaped recess 28, which is V-shaped in cross-section and widens inwards towards the holder shaft 14. In the present embodiment, the groove- or channel-shaped recess 28 is interrupted at four points by through-grooves 30, which serve to allow at least the group of clamping cams 19 to pass through when the holder 12 is inserted into the receptacle 10. Accordingly, the recess 28 is composed of four arc-shaped annular groove segments 32, of which only two are shown in Figure 1. Furthermore, the recess 28, or rather the individual annular groove segments 32, extends transversely to a longitudinal or insertion axis 34 of the holder 12 in the associated holder receptacle 10.In any case, the annular groove segment 32 must be positioned such that a locking element 36 can actually engage with the segment 32 or with the compensating device 22, which will be explained in more detail below. In this respect, it would certainly be possible to provide several compensating devices 22 in groove form and in a concentric arrangement in a row. As can be seen in particular from Figure 2, at least in the area of ​​the respective annular groove segment 32, the holder shaft 14 is received in the holder receptacle 10 with a predefinable constant radial distance and is held there, at least against falling out, in the centered fixed position during stationary machining by means of individual locking elements 36, which engage in a releasable manner with an adjacent annular groove segment 32.The individual locking elements 36 consist of insertable pressure pieces, each with a spherical surface that is spring-loaded and pressed outwards. When the holder 12 is inserted into the holder receptacle 10, the locking element 36, which is received in the holder shaft 14, engages with its spherical surface in the corresponding annular groove segment 32 under a predefinable spring preload, forming a positive and force-fit connection. The engagement of the spherical surface of a locking element 36 in the corresponding annular groove segment 32 is illustrated by way of example in Figure 2. It is understood that when the holder 12 is axially pulled out of the holder receptacle 14 with a corresponding tensile force, the locking elements 36 also disengage from the recess 28 along with their individual annular groove segments 32.

[0027] As can be further seen from Figure 2, the holder shaft 14 of the holder 12 widens outwards in stages towards the plate-shaped receptacle 24 for the machining tool. A first stage 38 abuts a shoulder-like recess 40 in the holder receptacle 10, and a second stage 42, with a larger diameter, abuts the free front face 44 of the holder receptacle 10. The first stage 38, together with the recess 40, forms a fit with a predefinable fit diameter. The second stage 42, on the other hand, forms a flat contact with this free front face 44. Therefore, the pairing 42, 44 serves to improve the support and transfer of machining forces from the machining tool via the holder 12 into the holder receptacle 10 and thus into the receptacle of a tool turret or a tool disc.In contrast, the pairing 38, 40 is responsible for the centering and positioning of the components relative to each other.

[0028] Furthermore, the holder receptacle 10 has a housing 46 with two housing parts 48, 50, which are rotatably connected to each other and accommodate the locking device 16. A screw connection 52 with individual engagement screws serves to firmly connect the housing parts 48, 50 to each other. These screws are inserted from the rear of the second housing part 50 towards the first housing part 48, as seen from the perspective of Figure 1.

[0029] As shown in Figure 1, the first housing part 48 has the actuating device 18 for pivoting or rotating the locking device 16 from the release position to the locking position and vice versa. The second housing part 50, on the other hand, has an interface 54 on its end face facing away from the locking device 16, in particular in the form of a rod-shaped standard interface, as shown. The interface 54 is, for example, designed in the form of a cylindrical clamping pin 56 with individual transverse ribs 58, which can optionally extend on one side or the other of the clamping pin 56 or on both opposite sides of the same. In this way, a standard interface is created, for example VDI 40 (DIN 66890), for receiving in a corresponding interface of a tool disc or a tool turret.In this respect as well, the entire machining system can be fixed to the disc or the turret via interface 54.

[0030] As previously explained, on the holder shaft 14 of the holder 12, groups of clamping cams 19 and, additionally, of mounting cams 60 are provided, separated from one another in the axial insertion direction. Both of these cams engage the associated through-grooves 30 in one housing part 48. In the insertion direction, the clamping cams 19 come first, followed by the mounting cams 60, which, viewed longitudinally, are aligned with at least one clamping cam 19 of a corresponding pair. Furthermore, Figure 1 shows the locking device 16 in its release position, in which the individual through-grooves 30 of one housing part 48, arranged in pairs, are aligned with the further through-grooves 62 (see also Figure 4) in the locking device 16. For a locking operation of the holder 12 in the holder receptacle 10, only the clamping cams 19 pass through these grooves.

[0031] As shown in Figure 4, the locking device 16 has a crown gear 64 which is penetrated on its inner circumferential side by the further through-grooves 62, wherein, viewed in the direction of Figure 4, the annular crown gear 64 has along its front free end face a toothing 66 with two individual, arc-shaped toothed sections 68, each of which has between them a pair of further through-grooves 62, the position of which is such that, in the release position of the locking device 16 or of the crown gear 64, the clamping cams 19 can pass through the further through-grooves 62, wherein, when the crown gear 64 is rotated or pivoted into its locking or locking position, the respective clamping cam 19 comes into clamping contact with the rear clamping surface 20 of the crown gear 64. This rear grip is shown for a pair of opposing clamping cams 19 in Figure 2.The clamping process for the respective clamping cam 19 is reversible, i.e., when the crown wheel 64 is pivoted back to its initial or release position using the actuating device 18, the clamping cams 19 disengage from the clamping device 16 and the holder 12 with the tool can be withdrawn from the holder receptacle 10 along the through-grooves 30, 62, for example during a tool change by inserting a new holder 12 (not shown), which can also be done using a handling system (robot).

[0032] The actuating device 18, comprising two opposing pinion drives 72, serves to pivot the crown gear 64. The respective circumferential teeth of these pinions mesh with the teeth 66 in the form of a corresponding toothed section 68. Accordingly, the crown gear 64 can be actuated at two points in the first housing part 48 that are offset by 180° from each other. When one pinion drive 72 is actuated, the other pinion drive 72 is necessarily engaged via the crown gear 64.

[0033] As further shown in Figure 3, the respective pinion drive 72 can be moved between two end positions at its engagement point 73 by means of an associated actuating tool, such as an Allen key, whereby the symbolic representation of an open or closed lock 74 or 75 on the outside of the first housing part 48 represents the position in which the crown wheel 64 is currently located, i.e. whether it is in its release position (open lock 74) or its locking or fixing position (closed lock 75).

[0034] In Figure 3, the pinion drive 72, located at the front in the viewing direction, is in the open position, as represented by an open lock 74. Accordingly, the locking device 16, or rather the crown wheel 64, is in the release position, in which the holder 12 can be easily inserted into or removed from the holder receptacle 10. The actuation of the actuating device 18 with its two pinion drives 72, offset by 180° each time, can also be automated by means of a handling system (not shown). In this open lock position 74, the access grooves 30, 62 are in alignment with each other.

[0035] As can be seen in particular from Figure 5, each clamping cam 19 has two different contact surfaces which meet along a transverse central or separating plane 76, one contact surface having a slope 78 for sliding up along the clamping surface 20 of the fixing device 16 and a flat counter clamping surface 80 for defined fixing on the respective rear clamping surface 20 of the fixing device 16 with a predefinable clamping force.Viewed in the direction of Figure 1, when the foremost pinion drive 72 is pivoted clockwise from the open position 74 to the closed position 75, the crown gear 64, viewed in the direction of the front toothing 66 with its two sections 68 along the longitudinal axis 34, also rotates clockwise. The crown gear 64 moves from its release position to its locking position, in which the respective clamping cam 19 first slides with its inclined surface 78 onto the clamping surface 20 of the gear 64. Then, with further pivoting in the same direction, it comes into contact with the opposing clamping surface 80, so that the respective clamping cam 19 is in a clamping position against the clamping surface 20. Thus, taking into account any possible tolerance compensation via the compensating device 22, the holder 12 is clamped in the holder receptacle 10.In reverse order as above, the holder 12 can then also be removed from the receptacle 10.

[0036] The key-like cam 60 associated with a predefinable locking cam 19 of a pair allows force transmission in the radial direction when the respective cam 60 is received in the through-grooves 30 in edge contact with the respective intervening web-like support segments 82, such that the torques occurring during stationary machining can be reliably transmitted. Any axial forces and tilting moments during operation, on the other hand, are transmitted by the flat contact surfaces in conjunction with the pull-in force that arises when the respective clamping cam 19 moves onto the locking device 16.

[0037] As shown in particular in Figure 2, a cylindrically projecting connecting part 84 is formed at the free end face of the holder shaft 14, which is opposite the fixing point 24 for the machining tool. This connecting part carries a ring seal 86 and is inserted precisely into a hollow cylindrical recess 88 in the holder receptacle 10 with an axial distance. In this way, it is possible to supply a coolant lubricant via the holder receptacle 10 and a centrally arranged coolant channel 90 in the holder 12. The coolant exits the holder 12 to the outside at a discharge opening 92 in the direction of the machining tool.

[0038] The machining system according to the invention allows a variety of different holder receptacles 10 to be fitted with various types of holders 12, thus creating a kind of modular system for machining systems in stationary applications. In particular, in an alternative embodiment (not shown), it is also possible to fix the holder 12 in the holder receptacle 10 at a right angle to its longitudinal axis 34. In this case, only a pinion drive 72 is used, which is freely accessible from above for actuation. Otherwise, the basic design of the holder receptacle 10 with the holder 12 remains essentially unchanged.

Claims

P a t e n t a n s p r ü c h e 1. Machining system, comprising at least a holder receptacle (10) arranged stationary in operation and a holder (12) provided for receiving a machining tool, the holder having a holder shaft (14) and being interchangeably lockable in the holder receptacle (10) by means of a locking device (16), wherein the locking device (16) is movable from a release position to a locking position and vice versa by means of an actuating device (18) during a locking or release operation, in which the holder (12) is guided into the holder receptacle (10) in a manner that allows it to be inserted into and removed from it, or is held in its inserted position in the holder receptacle (10) and is drawn in with a predefinable clamping force, and wherein the holder (12) has at least one clamping cam (19) arranged on the holder shaft (14) which is engaged or disengaged for a locking or release operation.in addition to the system with an assignable clamping surface (20) of the fixing device (16), characterized in that the holder receptacle (10) has a spring-elastic compensating device (22) which enables, at least in the fixing position, a tolerance compensation between holder receptacle (10) and received holder (12).

2. Machining system according to claim 1, characterized in that the compensating device (22) is formed from at least one recess (28), preferably in the form of a circular arc-shaped ring groove segment (32), which preferably extends transversely to a longitudinal or insertion axis (34) of the holder (12) in the associated holder receptacle (10).

3. Machining system according to claim 1 or 2, characterized in that at least in the area of ​​the respective annular groove segment (32), the holder shaft (14) is received in the holder receptacle (10) with a predefinable radial distance and is secured at least against falling out in the fixed position for stationary machining by means of at least one locking element (36) which engages in a releasable manner in an adjacent annular groove segment (32).

4. Machining system according to one of the preceding claims, characterized in that the holder shaft (14) of the holder (12) widens in a radial direction towards a fixing point (24) for the machining tool, a first step (38) of which abuts a shoulder-like recess (40) in the holder receptacle (10) and a further second step (42) abuts the free end face (44) of the holder receptacle (10).

5. Machining system according to one of the preceding claims, characterized in that the holder (12) is positioned in the holder receptacle (10) by the predefinable fitting diameter between the first stage (38) and the shoulder-like recess (40).

6. Machining system according to one of the preceding claims, characterized in that the holder receptacle (10) has a housing (46) with at least two housing parts (48, 50) which are rotatably connected to one another and which receive the fixing device (16) between them.

7. Machining system according to one of the preceding claims, characterized in that one housing part (48) includes the actuating device (18) for pivoting or rotating the The locking device (16) has a locking position from the release position to the locking position and vice versa, and the other housing part (50) has an interface (54), in particular in the form of a standard interface, on its end face facing away from the locking device (16).

8. Machining system according to one of the preceding claims, characterized in that, viewed from the axial insertion direction on the holder shaft (14) of the holder (12), a group of mounting cams (60) and clamping cams (19) are provided, separated from one another, which both engage through the associated through-grooves (30) in one housing part (48) and that, in the release position of the locking device (16), the through-grooves (30) of one housing part (48) are in alignment with further through-grooves (62) in the locking device (16), which can be traversed by the clamping cams (19) for a locking operation of the holder (12) in the holder receptacle (10), by engaging through them.

9. Machining system according to one of the preceding claims, characterized in that the locking device (16) has a crown gear (64) which has further through-grooves (62) on its inner circumferential side and which has at least on one free end face a toothing (66) which interacts with a corresponding toothing (72) of the actuating device (18) and which has on its side opposite the respective toothing (66) the clamping surface (20) which is provided for a contact with the respective clamping cam (19) as soon as the crown gear (64) is pivoted from its release position into the locking position by means of the actuating device (18).

10. Machining system according to one of the preceding claims, characterized in that the respective clamping cam (19) has two has different contact surfaces in the form of an inclined surface (78) for sliding up onto the clamping surface (20) of the crown wheel (64) and a flat counter-clamping surface (80) for clamping with the crown wheel (64) via its clamping surface (20). 1 1. Machining system according to one of the preceding claims, characterized in that during the fixing process, when the respective clamping cam (19) of the holder (12) slides onto the flat clamping surface (20) of the crown wheel (64), the compensating device (22) is deformed, at least partially.

12. Machining system according to one of the preceding claims, characterized in that the toothing of the actuating device (18) has at least one, preferably two, pinion drives (72) which are arranged on two opposite sides (0° / 180°) in the holder receptacle (40) so as to be actuated from the outside.

13. Machining system according to one of the preceding claims, characterized in that a cylindrically projecting connecting part (84) is formed at the free end face of the holder shaft (14), which is opposite the fixing point (24) for the machining tool, which carries a ring seal (86) and which is inserted precisely into a hollow cylindrical recess (88) in the holder receptacle (10) with axial spacing, for the purpose of supplying a coolant lubricant via a central coolant channel (90) in the holder (12), which exits the holder (12) at a discharge opening (92) in the direction of the machining tool.

14. Holder receptacle in stationary configuration for a processing system according to one of the preceding claims, wherein characterized in that the holder receptacle (10) has a housing (46) consisting of at least two housing parts (48, 50) between which the pivotable locking device (16) is accommodated.

15. Holder receptacle according to claim 14, characterized in that one housing part (48) has the actuating device (48) and the other housing part (50) has a standard interface (54) for fixing the holder receptacle (10) in an associated fixing receptacle (16) of a tool turret of a machine tool and that one housing part (48) has the compensating device (22).

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