Processing system

Abstract

2. Machining system, comprising at least a stationary holder receptacle (10) 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 inserted into and removed from the holder receptacle (10) or held in its inserted position in the holder receptacle (10) and is drawn in with a predefinable clamping force, wherein the holder (12) has at least one clamping cam (96) 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 of the fixing device (16), characterized in that the holder receptacle (10) has a spring-elastic compensating device (24) which enables, at least in the fixing position, a tolerance compensation between holder receptacle (10) and received holder (12).

Description

[0001] 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 clamping force, 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.

[0002] Machining systems of various types are known from the prior art. For example, DE 10 2018 007 084 A1 discloses a machining system that has a tool holder with a stationary insertion part and a drive unit with an insertion part that can be rotated by means of a insertion device and brought into engagement with the insertion part.

[0003] The tool holder and the drive unit are each provided with a toothed section on adjacent, opposing contact surfaces, the axial distance of which can be engaged with each other by rotating the feeder section using the feeder device until they are in contact, thus allowing the tool holder and the drive unit to be axially clamped against each other. Such tool holders are also referred to as spindle heads and, when mounted in a tool turret (DE 10 2018 004 677 A1), serve to drive a machining tool in rotation via the tool drive during operation. The disc-shaped tool turret as a whole is pivotable, allowing machining tools arranged on its outer circumference to be swiveled into a common machining position.

[0004] 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.

[0005] Based on this state of the art, the invention aims to further improve the processing systems known in this respect.

[0006] A machining system with the features of claim 1 in its entirety solves such a problem. According to the characterizing part of claim 1, the holder receptacle has a spring-elastic compensating device that, at least in the fixed position, allows for tolerance compensation between the holder receptacle and the holder it accommodates. This improves force transmission between the stationary holder receptacle and the holder with the machining tool. In particular, the tolerance compensation ensures that the same elastic deformation is always achieved during the fixing process for a given type of holder, thus generating a consistent, defined clamping force. This improves force transmission and contributes to relieving stress on the components responsible for force transmission.In particular, the holder mounting is fixed in a stationary position during operation of the device, for example in a holder of a tool turret, via a VDI interface, such as VDI 40 according to DIN 69880.

[0007] Overall, a modular interface is created 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 an indexable insert that is interchangeably fixed to the stationary tool holder, for example, via a suitable screw connection to an insert seat of the holder.

[0008] Due to the aforementioned tolerance compensation between the holder receptacle and the holder being held, a functionally reliable connection is always achieved using the locking device, even when using different machining tools with a standardized holder, using the machining system mentioned above.

[0009] In a preferred embodiment of the machining system according to the invention, the compensating device has a receiving flange with at least one front flat contact surface arranged at the end face for contact with a correspondingly shaped flat contact surface of the holder, and with an engagement element that engages in the holder receptacle in the direction of the fixing device and which is weakened by at least one groove along its wall profile. The receiving flange as a whole can be manufactured with a precise fit and then fixed in a defined manner to one free end face of the holder receptacle, for example by screwing it on, which facilitates the manufacture of the machining system as a whole. Furthermore, a higher degree of modularity can be achieved in this way, similar to a modular system, because there are more possibilities to combine different types of holder receptacles with different types of receiving flanges.

[0010] In a further preferred embodiment of the machining system according to the invention, the receiving flange, which is fixed to the holder receptacle and as part thereof, has a further flat contact surface on its opposite end face for contact with an adjacent flat contact surface of the holder receptacle. Due to the interaction of the various flat contact surfaces and mating diameters, a high degree of machining accuracy can be achieved with the stationary holder and holder receptacle. The flat contact surfaces, designed to be as large as possible, generate ideal support for machining tools, such as indexable inserts, arranged on a holder.

[0011] The holder has at least one fitting diameter that interacts with a centering surface on the inner circumference of the receiving flange. This fitting diameter serves to position the holder within the corresponding fitting diameter in the receiving flange, in the form of the hollow cylindrical centering surface.

[0012] In a preferred embodiment of the machining system according to the invention, the holder is guided circumferentially with play along inner circumferential surfaces in the holder receptacle, which is stationary and interchangeably mounted in the tool disc, towards its other free end face. This creates clearance between adjacent components of the holder receptacle and the holder, thus preventing unnecessary stress in the clamped state, which could otherwise lead to over-constraints and consequently impair the defined clamping process. In this respect, the adjacent surfaces in this rear region of the holder receptacle and the holder serve as guide surfaces, facilitating the insertion of the holder into the holder receptacle.

[0013] In a further preferred embodiment of the machining system according to the invention, the clamping device comprises a crown gear with a contact surface for contact with the further flat contact surface of the receiving flange and with flat contact surfaces for contact with a clamping cam of the holder, each of which has an associated clamping surface. This clamping cam has a ramp for sliding up the flat contact surface of the crown gear and a flat clamping surface for clamping against the flat contact surface of the crown gear. In this way, the clamping process is initiated with minimal force when the crown gear is pivoted from its release to the clamping position, and the holder with the respective machining tool is pulled towards the conical recess of the stationary holder mount.

[0014] In a further preferred embodiment of the machining system according to the invention, it is provided that during the clamping process, as the respective clamping cam of the holder slides onto the flat contact surface of the crown gear, the compensating device is deformed, thereby initiating a clamping process between the holder and the holder receptacle. As the clamping process progresses, the compensating device on the receiving flange, and thus on the holder receptacle, is progressively deformed and provides a counterforce that generates the actual clamping force between the holder and the holder receptacle.

[0015] In a further preferred embodiment of the machining system according to the invention, the actuating device for the crown gear, which, when the holder is inserted into the holder receptacle, encompasses the holder, has at least one pinion drive that extends through the holder receptacle. In this way, the pinion drive for driving the crown gear is securely integrated into the holder receptacle and yet easily accessible from the outside for actuation. This prevents incorrect operation.

[0016] In a further preferred embodiment of the machining system according to the invention, pressure pieces are recessed on the outer circumference towards the other free end face of the holder. In the fixed position of the holder, these pressure pieces engage in a corresponding annular groove in the holder receptacle, and a ring seal is subsequently accommodated in the holder. When the pressure pieces are engaged, this results in secure positioning, even in the area of ​​the rear part of the respective holder in the stationary holder receptacle, while simultaneously providing a reliable seal in the area of ​​the other free end face of the tool holder.

[0017] The invention also relates to a holder receptacle in a stationary configuration for a machining system, as described above, wherein the holder receptacle has a spring-elastic compensating device on one of its free end faces, which enables tolerance compensation between a holder receptacle and a holder it accommodates, at least in one fixed position. Furthermore, it is preferably provided that the holder receptacle accommodates a standardized interface, such as VDI 40 according to DIN 69880, at one of its free ends, particularly for mounting in an associated tool or disc turret.

[0018] The machining system according to the invention is explained in more detail below with reference to an exemplary embodiment shown in the drawing. The drawing shows, in a general and not to scale, the following: Fig. 1. The machining system as a whole in the form of an exploded view; Fig. 2. A longitudinal section through the machining system along line II-II according to the Fig. 3a in the compound state; Fig. 3. In the extended state, the processing system according to the Fig. 2; Fig. 3a a front view of the holder after the Fig. 1, Fig. 2 to Fig. 3, without machining tool; Fig. 4 a detail marked with X in the Fig. 1 in enlarged reproduction; Fig. 5 and Fig. 6 components of the fixing device of the machining system; Fig. 7 an enlarged view of a detail labeled Y in the Fig. 2 with parts of an actuating device; Fig. Figure 8 shows a pinion drive in perspective view, as used for the machining system according to the Fig. 1, Fig. 2 and Fig. 7 is used; Fig. 9 An exemplary top view of part of a holder mount with inserted pinion drive according to the Fig. 8 in the activated operating position 1; Fig. 10 and Fig. 11 once in perspective top view and once in longitudinal section a flange-like compensation device for maintaining a tolerance compensation between holder receptacle and received holder.

[0019] The one in Fig. The machining system shown in Figure 1 consists of a stationary holder receptacle 10 and a holder 12 designed to receive a machining tool (not shown), such as a conventional 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 from a release position to a locked position and vice versa by means of an actuating device 18 during a locking or release operation. In the locked position, the holder 12 is guided into and out of the holder receptacle 10, or held in its inserted position and retracted with a predefinable clamping force. For this purpose, the holder 12 has at least one, preferably several, clamping cams 96 arranged on the shank 14, each of which is engaged or disengaged for a locking or release operation.except for the system with an assignable flat system area 22 of the fixing device 16 (see . Fig. 6) For this purpose, the holder receptacle 10 has a spring-elastic compensating device 24, as described in more detail in the Fig. 10 and Fig. Figure 11 shows a tolerance compensation between the holder mount 10 and the mounted holder 12, at least in the fixed position. The holder 12 has a plate-shaped receptacle 20 on its front free end face for receiving an indexable insert, the effective cutting edge of which, which can be brought into engagement with a workpiece for machining (not shown), lies on a fictitious circumferential circle that lies outside a circumferential edge 21 of the head geometry 23 (see Figure 11). Fig. 3a) is arranged.

[0020] The tool holder 10 represents the insert for a stationary, non-driven tool, whereby a complete representation of the associated tool turret has been omitted for the sake of clarity. With the stationary machining system according to the Fig. 1 A modular interface is provided for fixing a cutting tool to the holder 12. A conventional locking screw of a threaded connection serves to hold the replaceable indexable insert, of which in the Fig. 1 only the threaded bore is shown in Annex 20. A preferably flat guide 25 on the free end face of the otherwise essentially cylindrical head geometry for the holder 12 serves for chip removal.

[0021] As can be seen in particular from the Fig. 10 and Fig. As shown in Figure 11, the compensating device 24 has a receiving flange 34 in the form of a disc-shaped body with a flat contact surface 36 on the free end face of the receiving flange 34. This flat contact surface 36 serves for precise alignment with a correspondingly shaped flat contact surface 38 of the holder 12. The disc portion of the receiving flange 34 is provided with through-holes 40, which are penetrated by individual engagement screws 42 and serve to secure the receiving flange 34 to the free end face 44 of the holder receptacle 10. Furthermore, individual locating and stop pins (not shown) are provided, which also penetrate through holes 48 of the receiving flange 34 and serve for the precise alignment of the receiving flange 34 on the holder receptacle 10 during fastening.

[0022] All bores 40, 48 are evenly distributed along the flange surface of the receiving flange 34, as are the engagement screws 42 and the dowel and stop pins. One of the pins ensures that the flange 34 is securely aligned in the machining direction, and another pin ensures that a pinion shaft of a pinion drive is stopped. As can be seen further from the Fig. 10 and Fig. As shown in Figure 11, the receiving flange 34 has an annular engagement part 50 which is integrally connected to the flange plate of the receiving flange 34. In the assembled state of the machining tool as shown in Figure 11, the mounting flange 34 has an annular engagement part 50 which is integrally connected to the flange plate of the receiving flange 34. Fig. 2 The engagement part 50 engages in the free opening 79 of the holder receptacle 10. As shown in particular in the cross-sectional view after the Fig. As shown in Figure 11, the engagement part 50 is weakened on its outer and inner circumferences by a groove 52 and 54, respectively, which are incorporated into the circumferential wall 56 of the engagement part 50. The groove profile of each groove may also be interrupted. The receiving flange 34 is fixed to the end face of the holder receptacle 10 by means of the engagement screws 42. Furthermore, the receiving flange 34 has another flat contact surface 58 on its opposite end face for mating with an adjacent, end-face flat contact surface 60 of the holder receptacle 10.

[0023] As can be seen in particular from the Fig. As shown in Figure 2, the holder 12 has a fitting diameter 64 below a disc-shaped mounting plate 62, with a predefinable diameter that can be interrupted and otherwise interacts precisely with a machined, adjacent centering surface 66 on the inner circumferential side of the receiving flange 34. In this way, precise alignment and positioning of the holder 12 in the holder receptacle 10 is achieved via the flat contact and fitting surfaces. In contrast, as is particularly evident from the Fig. Figure 2 shows that the holder 12 is guided circumferentially with clearance ("play") along at least one inner circumferential surface 70 in the holder receptacle 10 in the direction of its other free end face 68. In particular, a predefinable axial distance is also formed between the other free end face 68 and a bottom part 72 of the holder receptacle 10, which extends transversely to the longitudinal axis 74 of the machining system.

[0024] The inner circumferential surface 70 of the holder part 10 has two cylindrical sections 76, 78, wherein the cylindrical section 76 has a smaller free diameter than the cylindrical section 78, which widens continuously and conically in diameter along an inner wall section 80 towards the opening 79 of the holder receptacle 10. From the outer circumference, the holder receptacle 10 is constructed in the manner of a conventional stationary system for mounting in the housing of a tool turret (not shown) by means of a cylindrical clamping pin 81 with individual transverse ribs 82, forming a standard interface, for example VDI 40 (DIN 66890). For machining with a cutting tool in the holder 12, a coolant channel 83' can exit towards the head of the holder 12 via a central bore 83 on the end face.

[0025] If a cylindrical wall section 84 on the holder shaft 14 engages with clearance into the cylindrical section 78 of the holder receptacle 10, individual spring-loaded pressure pieces 86 are provided on the outer circumference of the holder 12 in this area. These pressure pieces are arranged at equal radial intervals relative to the longitudinal or machining axis 74, preferably diametrically opposed to each other, and engage in a corresponding annular groove 88 on the inner circumferential surface 70 of the holder receptacle 10 in a force-fit and form-fit manner, thus indirectly indicating the complete insertion of the holder 12 into the holder receptacle 10. Preferably, each pressure piece 86 is provided at its end with a spherical surface for releasable engagement in a circumferential detent or annular groove 88 on the inner circumferential surface 70 of the holder receptacle 10.On the subsequent cylindrical wall section 90 of the holder 12, which follows in a stepped manner, a circumferential O-ring is inserted as a ring seal 92 in a receiving groove 94 in the holder shaft 14. The sealing ring 92 seals the internally running, not shown, channel sections intended for coolant flow from the surrounding environment.

[0026] The following section will now describe the owner 12 and his ownership 14 based on the Fig. 1, Fig. 2, Fig. 3 and Fig. 4 will be explained in more detail. Four clamping cams 96 are arranged along the cylindrical outer circumferential surface of the holder shaft 14. These are grouped in pairs and arranged diametrically opposite each other at equal radial distances to the longitudinal or machining axis 74. One of the four clamping cams 96 is located in the Fig. 4 shown in enlarged representation, wherein a clamping cam 96 has a slope 98 for sliding up on the fixing device 16 and a flat clamping surface 100 for defined fixing on the respective clamping surface 22 of the fixing device 16, which will be explained in more detail below.

[0027] The four clamping cams 96 project at a predetermined distance above the outer circumferential surface of the holder shaft 14 and are arranged between the support plate 62 with the fitting diameter 64 and the individual pressure pieces 86, and thus in a central area between the aforementioned components. In addition to the four clamping cams 96, there are also two system cams 102, of which in the Fig. 1. Both are only partially represented. The two identically designed clamping cams 102 are arranged diametrically opposite each other at the same radial distance to the longitudinal axis 74 and project cuboidally beyond the outer circumference of the holder shaft 14. Furthermore, their central longitudinal axis is aligned with the parting line 104, which separates the inclined surface 98 from the flat clamping surface 100 of an adjacent clamping cam 96. In this respect, viewed axially, the two clamping cams 102 are positioned between adjacent clamping cams 96 and the fitting diameter 64 on the holder shaft 14 with a projection that approximately corresponds to the projection of the respective clamping cam 96.

[0028] Back to Fig. Four through-grooves 106 are provided on the inner circumferential side of the engagement part 50. These grooves are grouped in pairs and are traversed by both the clamping cams 96 and the machine cams 102 during an insertion and fixing process of the holder 12 in the receptacle 10 until the clamping cams 96 disengage from the through-grooves 106. However, the two machine cams 102 remain in a corresponding rectangular through-groove 106 with clearance, so that static moments during machining with the holder 12 can be transmitted via the combination of the through-groove 106 and the respective machine cam 102 in engagement via the receiving flange 34, which is rigidly coupled to the holder receptacle 10. Before such an insertion and fixing process, the through-grooves 106 of the receiving flange 34 and the groove-like through-openings 114 within the fixing device 16 must be disengaged from each other.Preferably, only one through-groove 106 needs to be precisely formed so that an associated cam 102 with this precisely fitting through-groove 106 transmits the force, taking into account that the indexable insert, during machining, causes the force to be introduced into the holder 12 and holder receptacle 10 off-center to the longitudinal axis 74, but that a reliable force transmission into the holder receptacle 12 nevertheless occurs. The force is transmitted, firstly, in the direction of rotation, via the keys or cam 102 upon contact with the through-grooves 106; and secondly, the axial forces and tilting moments are absorbed by the resulting force between the webs 118 at the clamping device 16.

[0029] The cams 96 and 102 are arranged rotationally symmetrically on the holder 12, so that no oblique force is introduced into the holder receptacle 10. Thanks to the symmetrical arrangement of the four clamping cams 96, a uniform degree distribution of 60° and 120° is achieved along the circumference. Differently shaped gripper grooves 108 can be provided along the outer circumference of the carrier plate 62, including those with an asymmetrical design, with one of these gripper grooves 108 forming a recess in the Fig. 1 and Fig. Figure 3 shows that the gripper grooves 108, which are diametrically opposed to each other with respect to the longitudinal axis 74, are arranged on a cylindrical circumferential surface of the support plate 62, which points towards the other free end face 68 of the holder 12. This enables automated tool change operation for the respective holder 12 by means of the two preferably symmetrical, opposing gripper grooves 108 and bearing-oriented gripping for the tool adapter 12. The force on the cams 96 is constant regardless of the number of cams 96. To avoid mismatches, only one precisely fitting cam 102 needs to be engaged on the cams 102. In this respect, the individual cams 102 are designed as keys. For use as a tool adapter, the holder 12 is preferably equipped with various types of cutting tools (not shown).

[0030] The locking device 16 is explained in more detail below. It features a crown wheel 110, as described in more detail in the Fig. 5 and Fig. Figure 6 shows the crown wheel 110 having a contact surface 112 for a flat contact surface with a further flat contact surface 113 of the receiving flange 34.

[0031] The planar contact surface 113 is formed from four arc-shaped sub-surfaces 115, which extend along the inner circumferential side of four individual webs 117. Each sub-surface 115 forms part of a clamp- or bracket-like guide, the free ends of which open in pairs towards a cylindrical central opening 119 of the engagement part 50. The projecting ends of the guide, as part of each sub-surface 115, define an opening between them, the free width of which corresponds to the width of each through-groove 106 and is otherwise aligned parallel to the axis of the groove. All sub-surfaces 115 span a common, interrupted contact surface that runs transversely to the longitudinal axis 74. Furthermore, the sub-surfaces 115 extending along an imaginary inner ring 121 form the free end face of the engagement part 50.Further sub-surfaces extend along the outer circumference, forming an outer fictitious ring surface 123, which is axially offset from the foremost sub-surfaces 115. In the assembled state of the machining system, the sub-surfaces 115 extending along the fictitious inner ring 121 have clearance or play with the adjacent contact surfaces 112 of the crown wheel 110.

[0032] The crown wheel 110 also has groove-like through-openings 114 which in an initial state designated 0 ( Fig. 9) are in alignment with the preceding through-grooves 106 of the receiving flange 34. Between the through-grooves 114, which are grouped in pairs, two arc-shaped toothed sections 116 are arranged, projecting axially beyond the contact surface 112. On the opposite side of the crown gear 110, four webs 118 are arranged with different circumferences in pairs, which have flat contact surfaces 22 along their free end faces. These surfaces interact with the surfaces 98, 100 of the clamping cams 96, as will be explained in more detail below. Furthermore, the crown gear 110 has an annular or support surface 120 on its side opposite the toothing 116, which is in contact with a shoulder-like annular surface 122 ( Fig. 1) on the inside of the holder receptacle 10, which is set back by a predefinable axial distance from the opening 79 of the holder receptacle 10. Along this annular surface 122 of the holder receptacle 10, the crown wheel 110 can be pivoted back and forth about the longitudinal axis 74. As can be seen further from the Fig. As 6 results, each flat contact surface 22 is provided at the transition point to one of its free end faces with a radius for sliding up the respective inclined surface 98 of a clamping cam 96, the sliding process continuing until the flat clamping surface 100 of the respective clamping cam 96 comes into planar contact with the flat contact surface 22 of each web 118. For better identification, the corresponding radius is marked at one point with a circle labeled Z in Fig. 6 outlined.

[0033] Each toothed section 116 of the crown gear 110 is assigned a pinion drive 144 with a pinion toothing 146 that engages with the respective toothing 116 of the crown gear 110, for which purpose the pinion toothing 146 only needs to be partially arranged along the outer circumference of the pinion drive 144. Looking towards the Fig. As seen in Figure 8, the respective pinion drive 144 has a groove-shaped recess 148 in a further circumferential surface above it, which serves for the engagement of one of the two stop pins (not shown), which secure the respective pinion drive 144 in its position in the receiving flange 34 and in bores 150 along a flange-like widened outer circumference 151 ( Fig. 1) the holder receptacle 10. In this way, when the holder receptacle 10 is rotating with holder 12, the respective pinion drive 144 cannot fall out of its corresponding recess. The corresponding installation conditions are partially shown in the Fig. 7. The image is shown enlarged in principle and not to scale, and contains a detail marked Y. Fig. 2. In particular, the two stop pins for releasing the respective pinion drive 144 can be unscrewed from the threaded parts of the associated bores 48. As can be seen further from the Fig. As shown in Figure 8, each pinion drive 144 has a handle 152 on its free end face, which serves for the engagement of an actuating tool (not shown in detail), for example, in the form of an Allen key. Furthermore, the pinion drive 144 has a locking lug 154 projecting on its outer circumference, which, according to the illustration, Fig. 9 is guided in a cam guide 156 in the outer circumferential flange 151 of the holder receptacle 10. Position 0 represents an unactuated position and position 1 an actuated position, in which the crown wheel 110 is pivoted such that the flat clamping surfaces 100 of the clamping cams 96 are in planar contact with the contact surfaces 22 of the crown wheel 110. The in Fig. The pinion drive 144 shown in Figure 8, provided it is inserted into the associated recess in the holder receptacle 10 and also extends through two half-shell-shaped recesses 158 in the receiving flange 34, forms the actuating device 18 as a whole for the desired pivoting of the crown wheel 110 from an unactuated position 0 to an actuated position 1 and vice versa.

[0034] Advantageously, two pinion drives 144 are provided for the machining system, allowing for holder changes from different, particularly opposing, positions. Accordingly, any positional ambiguity regarding the holder mount 10 is limited to two positions (0° / 180°). Thus, the machining system is designed with two points of engagement in the form of the pinion drives 144, offset by 180° from each other. The gear mesh between the respective pinion teeth 146 and the toothed sections 116 of the crown gear 110 is selected such that one gear pair is always the driving pair, while the second pinion shaft, which is not subjected to torque, is the driven pair, i.e., driven in its respective position. In this way, the holder 12 can be used in any position (0° / 180°) and the clamping mechanism activated within the framework of automation.

[0035] For a fixing operation, the holder 12 is inserted into the holder receptacle 10 as described. The holder 12 is inserted by means of a purely linear movement coaxial to the longitudinal axis 74. The through-grooves 106 in the mounting flange 34 and the groove-like through-openings 114 in the crown gear 10 must be aligned with each other when the pinion drive 144 is in position 0, so that the clamping cams 96 lie on the side of the webs 118 of the crown gear 110. As soon as the holder 12 is inserted in the holder receptacle 10 in this manner, the crown gear 110 is pivoted by means of a pinion drive 144 provided for this purpose. The Fig.The pinion drive 144 shown in Figure 9 is pivoted clockwise from position 0 to position 1, with the result that the associated pinion teeth 146 are also moved clockwise and the resulting rotational movement is transmitted equally to the crown gear 110 via the respective toothed section 116, which is in engagement with the pinion teeth 146 of the actuated pinion drive 144. During this pivoting movement of the crown gear 110, the inclined surface 98 of each clamping cam 96 then slides over the radius designated Z onto the corresponding web 118 until the subsequent flat clamping surface 100 of the clamping cam 96 comes into contact with the flat contact surface 22 of the corresponding web 118, thus locking the holder 12 into the holder receptacle 10.For the corresponding fixing process, the respective bridge 118 with its flat contact surface 22 is pushed over the clamping cam 96 adjacent during the rotary or pivoting movement of the crown wheel 110, first over the inclined surface 98 and then over the flat clamping surface 100.

[0036] The possible clamping travel is limited by the locking lug 154 on the pinion drive 144, which then abuts a stop within the cam guide 156 in the holder receptacle 10. In addition to limiting the clamping travel, excess torque during handling is also dissipated, so that the resulting torque support protects the gear pair 146, 116 from overload. The crown gear 110 is thus rotated until it reaches the stop, causing the respective clamping surface 22 of the crown gear 110 to slide over the corresponding flat clamping surface 100 of the holder 12. The contact between the flat surfaces 22, 100 generates a defined clamping force, securing the holder 12 in the holder receptacle 10 with a predefinable clamping force.The torque support mentioned can be provided either by the actuating device 18 in conjunction with the locking nose 154 or by means of a stop pin (not shown) in conjunction with the actuating device 18.

[0037] The clamping process and the generation of the clamping force are made possible by the fact that the dimension between the outer boundary of the receiving flange 34 and the crown gear 110 in the released actuation position 0 is greater than the dimension between the flat contact surface 36 of the receiving flange 34 and the flat surface 100 of each cam 96 in the fixed actuation position 1. When the two chamfers in the form of the web radius on the web 118 and the chamfer 98 of the respective clamping cam 96 slide upwards against each other, the receiving flange 34 is elastically deformed, with the incorporated radial grooves 52, 54 supporting this deformation process.Because, at the end of the rotation process for the crown gear 110, the clamping surfaces 22 of the crown gear 110 and the clamping surfaces 100 of the cam 96 lie flat against each other with preload, the same elastic deformation is always achieved, which always generates a defined pull-in force, whereby, in the sense of "action" = "reaction", the pull-in force acting on the holder mounting base also simultaneously acts as a deformation force on the mounting flange 34 and, due to the aforementioned spring effect, the clamping or pull-in force is increased within the framework of an elastic clamping by means of the mounting flange 34.

[0038] The release process for the holder 12 then runs in the opposite direction to the clamping process, i.e. by turning the pinion drive 144 in the opposite direction of rotation the two clamping surfaces 22, 100 of crown wheel 110 or of respective cam 96 slide away from each other and the release of the connection in this respect causes the receiving flange 34 to return to its original shape due to its inherent elasticity.

[0039] When the crown gear 110 is returned to its open position via the respective pinion drive 144, i.e., at stop 0, the recesses 114 of the crown gear 110 and the through-grooves 106 of the mounting flange 34 are again aligned, and the holder 12 can be removed from the holder receptacle 10 by a purely linear movement along the axis 74. This release and removal process can be performed both manually and automatically. With the machining system according to the invention, a large number of different holder receptacles 10 can be equipped with holders 12 for receiving a machining tool in order to perform machining within the desired parameters. This has no equivalent in the prior art. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] DE 10 2018 007 084 A1

[0002] DE 10 2018 004 677 A1

[0003] FR 1 007 956

[0004]

Claims

[1] Machining system, comprising at least a stationary holder receptacle (10) and a holder (12) 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 inserted into and removed from the holder receptacle (10) or held in its inserted position in the holder receptacle (10) and is drawn in with a predefinable clamping force, wherein the holder (12) has at least one clamping cam (96) arranged on the holder shaft (14) which, for a locking or release operation, comes into contact or out of contact with an attributable clamping surface of the locking device (16), characterized by, that the holder receptacle (10) has a spring-elastic compensating device (24) which, at least in the fixed position, enables a tolerance compensation between holder receptacle (10) and the received holder (12). [2] Machining system according to claim 1, characterized by , that the compensating device (24) has a receiving flange (34) with at least one end-face arranged flat contact surface (36) for the system with a correspondingly designed flat contact surface (38) of the holder (12), and with an engagement part (50) that engages in the holder receptacle (10) in the direction of the fixing device (16) and that is weakened in its wall course by at least one groove (52, 54). [3] Machining system according to claim 1 or 2, characterized by, that the receiving flange (34) is fixed to the holder receptacle (10) and as part of the same, and has on its opposite end face a further flat mounting surface (58) for a system with an adjacent flat mounting surface (60) of the holder receptacle (10). [4] Processing system according to one of the preceding claims, characterized by , that the holder (12) has at least one pass diameter (64) which interacts with a centering surface (66) on the inner circumferential side of the receiving flange (34). [5] Processing system according to any of the preceding claims, characterized by , that the holder (12) is guided circumferentially with play along inner circumferential surfaces (70) in the holder receptacle (10) in the direction of its other free end face (68). [6] Processing system according to one of the preceding claims, characterized by, that the fixing device (16) has a crown wheel (110) with a contact surface (112) for the attachment with a further flat contact surface (113) of the receiving flange (34) and with flat contact surfaces (22) for the attachment with a clamping surface (100) of a clamping cam (96) of the holder (12) which has a slope (98) for sliding up on the flat contact surface (22) of the crown wheel (110) and a flat clamping surface (100) for clamping on the flat contact surface (22) of the crown wheel (110). [7] Processing system according to one of the preceding claims, characterized by , that during the fixing process, when the respective clamping cam (96) of the holder (12) slides onto the flat contact surface (22) of the crown wheel (110), the compensating device is deformed and a clamping process is initiated between holder (12) and holder receptacle (10). [8] Processing system according to any of the preceding claims, characterized by, that the actuating device (18) for the crown wheel (110), which in the inserted state of the holder (12) in the holder receptacle (10) comprises the holder (12) has at least one pinion drive (144) which is received in the holder receptacle (10) and passes through it, preferably that two pinion drives (144) are arranged on two opposite sides (0° / 180°) in the holder receptacle (10). [9] Processing system according to any of the preceding claims, characterized by , that pressure pieces (86) are recessed on the outer circumference towards the other free end face (68) of the holder (12), which engage in an associated annular groove (88) in the holder receptacle (10) in the fixed state of the holder (12) and that a ring seal (92) is subsequently received in the holder (12). [10] Processing system according to any of the preceding claims, characterized by, that a torque support is achieved by the interaction of the actuating device (18) with a stop pin (46) on the receiving flange (34) and / or with a locking lug (154) of the pinion drive (144). [11] Holder receptacle, in particular in stationary configuration, for a processing system according to one of the preceding claims, characterized by , that this has on its one free end face (68) a spring-elastic compensating device (24) which enables at least in one fixed position a tolerance compensation between the holder receptacle (10) and a received holder (12). [12] Holder receptacle according to claim 11, characterized by that it has a standardized interface at one free end for insertion into a tool turret.

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