Machining system

Abstract

A machining system comprising a replaceable holder 12 that functions as a tool holder and a holder mounting section 10 for receiving the holder 12. The holder mounting section 10 has a compensating device 24 and a fixing device 16 that can be moved by an actuator 18. The compensating device 24 functions as a spring at the end for axial support to the holder 12 and at the rear for elastic support of the fixing device 16.

Description

Technical Field

[0001] The present invention relates to a machining system, wherein the machining system comprises at least a drivable holder mounting portion and a holder provided for receiving a machining tool, the holder includes a holder shank and can be exchangeably fixed in the holder mounting portion by a fixing device, the fixing device is movable from a release position to a fixing position and movable from the fixing position to the release position by an actuator during a fixing or releasing operation, in which positions the holder can be guided such that it can be inserted into the holder mounting portion and removed again, respectively, or the holder can be guided such that it is retained in the holder mounting portion in the insertion position and pulled in by a predetermined pulling force, the holder has at least one clamping cam arranged on the holder shank, and the at least one clamping cam comes into contact or goes out of contact with an associated clamping surface of the fixing device during the fixing or releasing operation.

Background Art

[0002] Various types of machining systems are known by the level of the art. For example, Patent Document 1 (German Patent Application Publication No. 102018007084) discloses a machining system comprising a tool holder with a fixed insertion part and a drive unit with a feed part that is rotatable by a feed device that can engage with the insertion part. The tool holder and the drive unit each have toothed parts that can engage with each other on adjacent contact surfaces, and their axial distance can be reduced by rotating the feed parts by the feed device until they contact each other, thereby allowing the tool holder and the drive unit to be clamped axially to each other. Such a tool holder is also called a spindle head in technical terms, and when mounted on a tool turret (see Patent Document 2 (102018004677)), it drives the machining tool to rotate via its tool drive part, and the disc-shaped tool turret as a whole is rotatable, allowing the machining tools arranged on its outer circumference to rotate to a common machining position.

[0003] Patent Document 3 (French Patent No. 1007956) describes a tool holder shank comprising two fixing or clamping cams facing each other diametrically with respect to the longitudinal axis of the holder, the two fixing or clamping cams having an axial recess between them directed toward the collar of the holder. Each recess transitions into an undercut behind the clamping cam, and a fixing ring configured as a crown gear engages with this undercut, which can be rotated by an actuator via a bevel gear, so that when the tool holder is received in the adapter i.e., spindle insert, the tool holder can be further pulled into the adapter mounting portion by the rotatable fixing ring via inclined clamping surfaces on the two segment-shaped clamping cams. [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] German Patent Application Publication No. 102018007084 [Patent Document 2] German Patent Application Publication No. 102018004677 Specification [Patent Document 3] French Patent No. 1007956 Specification [Overview of the project] [Problems that the invention aims to solve]

[0005] Based on this level of technology, the present invention aims to further improve known machining systems. [Means for solving the problem]

[0006] Such problems are solved by a machining system having the features of claim 1 in its entirety. According to the feature portion described in claim 1, improved torque transmission between a drivable holder mounting portion and a holder having a machining tool is achieved by the fact that the holder mounting portion is equipped with an elastic flexibility compensation device that enables tolerance compensation between the holder mounting portion and the received holder, at least in the fixed position. In particular, this tolerance compensation ensures that the same elastic deformation is always achieved during the fixing operation for certain types of holders, resulting in the constant generation of a uniform and defined retraction force, which helps to improve torque transmission and contributes to reducing the burden on structural components that perform torque transmission.

[0007] Overall, a modular interface is created for clamping tool adapters (such as Weldons and milling arbors) and standard collets, thereby allowing tool holders to be integrally connected to metalworking tools as holders or carriers for machining tools. This modular interface is part of an automated guided tool (AGW), particularly for use in tool turrets, and the holder mounting section as a whole forms part of the spindle drive for the corresponding spindle head. The modular clamping or machining system can be operated manually, but automated operation is also possible, enabling automated tool changes.

[0008] To compensate for tolerances between the holder mounting portion and the received holder, the aforementioned machining system ensures that a functionally reliable connection using a fixing device is always achieved, even when using different machining tools with standardized holders.

[0009] In a preferred embodiment of the machining system according to the present invention, the compensation device comprises a mounting flange having at least one flat contact surface positioned on its end face to contact correspondingly configured flat contact surfaces of a holder, and an engaging portion engaging in the direction of the fixing device within the holder mounting portion and having its wall profile weakened by at least one groove. The corresponding mounting flanges can be manufactured in a precise fit using their respective flat contact surfaces and respective weakened engaging grooves, and can then be fixed in a predetermined manner to only one free end face of the holder mounting portion, for example, by screwing them in, thereby helping to facilitate the manufacture of the machining system as a whole. Thus, the modular system configuration allows for a greater degree of modularity, as there are more possibilities to combine different types of holder mounting portions with different types of mounting flanges.

[0010] In a more preferred embodiment of the machining system according to the present invention, the mounting flange is provided to be located on and fixed as part of the holder mounting portion, and to have an additional flat contact surface on its opposite end face for contact with an adjacent flat contact surface of the holder mounting portion. The interaction of the different flat contact surfaces and the mating diameter portion allows for a high degree of circular runout and unidirectional operation relative to the holder. The flat contact surface, configured to be as large as possible, creates an ideal support effect for the machining tool placed on the holder.

[0011] For consistent concentricity, it is also advantageous if the holder has at least one fitting diameter portion that interacts with the centering surface on the inner circumference side of the mounting flange.

[0012] In a preferred embodiment of the machining system according to the present invention, the holder is provided to be guided with play along the inner surface of the holder mounting portion toward the other free end face toward the inner side. In this way, "air" is generated between the holder mounting portion and adjacent components of the holder to avoid generating unnecessary force when clamped, otherwise this could lead to excessive restraint which would impair the specified fixing operation. In this regard, the adjacent surfaces in the holder mounting portion and the rear region of the holder serve as guide surfaces that help facilitate the insertion of the holder into the holder mounting portion.

[0013] In a further preferred embodiment of the machining system according to the present invention, the fixing device comprises a crown gear, the crown gear having a contact surface for contacting a further flat contact surface of the mounting flange and a flat contact surface for contacting the clamping surface of a clamping cam, each of which can be assigned to the holder, the clamping cam having an inclined portion for sliding up on the flat contact surface of the crown gear and a flat clamping surface for clamping on the flat contact surface of the crown gear. Thus, when the crown gear is rotated from its released position to its fixed position, the clamping process is initiated with minimal force, and the holders having their respective machining tools are pulled toward the conical mounting portion of the holder mounting portion.

[0014] In a more preferred embodiment of the machining system according to the present invention, during the fixing operation, as each clamping cam of the holder slides on the flat contact surface of the crown gear, the compensating device deforms, thereby facilitating the clamping operation between the holder and the holder mounting portion. As the clamping operation is facilitated, the compensating device on the mounting flange and, consequently, the holder mounting portion, deforms noticeably, providing a reaction force that generates an actual clamping force between the holder and the holder mounting portion.

[0015] In a more preferred embodiment of the machining system according to the present invention, the actuator for a crown gear surrounding a holder is provided to include at least one pinion drive unit that passes through the holder mounting unit when the holder is received within the holder mounting unit, while the holder is inserted into the holder mounting unit. In this way, the pinion drive unit for driving the crown gear is firmly integrated with the holder mounting unit and is easily accessible from the outside for operation. This eliminates the possibility of operational errors.

[0016] In a more preferred embodiment of the machining system according to the present invention, a pressing piece is fitted to the outer circumference toward the other free end face of the holder, the pressing piece engages with the corresponding annular groove of the holder mounting portion when the holder is in a fixed state, and it is provided that an annular seal is subsequently received in the holder. When the pressing piece is latched, this provides reliable positioning even in the rear region of each holder within the holder mounting portion, and at the same time provides reliable sealing in the region of the other free end face of the tool holder.

[0017] The present invention also relates particularly to a holder mounting portion for an actuator as described above, wherein the holder mounting portion has an elastically flexible compensation device on its free end face, and the elastically flexible compensation device enables tolerance compensation between the holder mounting portion and the received holder in at least one fixed position.

[0018] Here, the machining system according to the present invention will be described in more detail using an exemplary embodiment as shown in the drawings. The following description is schematic and not to scale. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] [Figure 1] Figure 1 shows the entire machining system in the form of an exploded view. [Figure 2] Figure 2 shows a longitudinal cross-section through the machining system according to Figure 1 in an assembled state. [Figure 3a] Figure 3a shows a perspective front view of a holder used in a machining system without a machining tool. [Figure 3b] Figure 3b shows a side view of a holder used in a machining system without a machining tool. [Figure 4] Figure 4 shows the detail marked X in Figure 3b in an enlarged representation. [Figure 5] Figure 5 shows components of a fixing device of the machining system. [Figure 6] Figure 6 shows components of a fixing device of the machining system. [Figure 7] Fig. 7 is an enlarged view of the circular portion indicated by reference sign Y in Fig. 2, together with a part of the actuating device. [Figure 8] Fig. 8 shows a perspective view of a pinion drive as used for the machining system according to Figs. 1, 2 and 7. [Figure 9] Fig. 9 shows a top view of a part of a holder mounting portion having the pinion drive inserted according to Fig. 8 in actuating position 1. [Figure 10] Fig. 10 shows, in a perspective top view, a flange-shaped compensation device for maintaining tolerance compensation between a holder mounting portion and a received holder. [Figure 11] Fig. 11 shows, in a longitudinal sectional view, a flange-shaped compensation device for maintaining tolerance compensation between a holder mounting portion and a received holder. MODE FOR CARRYING OUT THE INVENTION

[0020] The machining system shown in Figure 1 comprises a drivable holder mounting section 10 and a holder 12 provided for receiving a machining tool (not shown), the holder 12 having a holder shank 14 and being interchangeably fixed within the holder mounting section 10 by a fixing device 16. The fixing device 16 can be moved by an actuator 18 from a released position to a fixed position and from a fixed position to a released position as part of a locking or release operation, in which position the holder 12 can be inserted into and removed again from the holder mounting section 10, or, in its inserted position, held within the holder mounting section 10 and retracted with a predetermined retraction force. For this purpose, the holder 12 is provided with at least one, preferably a plurality of, clamping cams 96 located on the holder shank 14, each of which, in each case of a locking or release operation, comes into contact with or does not come into contact with an assignable flat contact surface 22 of the clamping device 16 (see Figure 6). For this purpose, the holder mounting portion 10 has an elastic flexibility compensation device 24 that enables tolerance compensation between the holder mounting portion 10 and the received holder 12, at least in the fixed position, as shown in more detail in Figures 10 and 11.

[0021] The holder mounting portion 10 represents the spindle or spindle insert of the automated guided tool (AGW), thereby, for clarity, the full expression of the AGW, also called the spindle head in technical terms, is omitted, although it is well known. The machining system shown in Figure 1 provides a modular interface for clamping the tool adapter as a holder 12, which, as shown, is a Weldon-type chuck system, comprising a cylindrical hole 26 for receiving the shank of the machining tool, which can be connected at the bottom to a coolant passage 28. Furthermore, the Weldon holder 12 comprises an engagement hole 30 with associated threads on its outer circumference, which serves to engage with a fixing screw 32 (Figure 1) for clamping the holder of the machining tool into the hole 26 of the holder 12. Since Weldon and many other holder systems are well known in the industry, they will not be discussed in further detail here.

[0022] As can be seen particularly in Figures 10 and 11, the compensation device 24 comprises a mounting flange 34 in the form of a disc-shaped body with a flat contact surface 36 on the free end face of the mounting flange 34. The corresponding flat contact surface 36 helps to ensure accurate mating with the correspondingly configured flat contact surface 38 of the holder 12. Through holes 40 are provided in the disc portion of the mounting flange 34, through which individual engaging screws 42 (Figure 1) pass to secure the mounting flange 34 to the free end face 44 of the holder mounting portion 10. Furthermore, as part of the fixing operation, individual dowels and stop pins 46 are provided, extending through holes 48 in the mounting flange 34 to ensure accurate mating and alignment of the mounting flange 34 on the holder mounting portion 10.

[0023] All holes 40, 48 are evenly distributed along the flange surface of the mounting flange 34, so that no imbalance can occur during rotational drive, even when inserting the engaging screws 42 and dowels and stop pins 46. One of these pins 26 ensures that the flange 34 is firmly aligned in the rotational direction, and the other pin 46 ensures that the pinion shaft of the pinion drive unit receives a stop. As can be seen further from Figures 10 and 11, the mounting flange 34 is provided with an annular engaging portion 50 integrally connected to the flange plate of the mounting flange 34. In the assembled state of the machined tool as shown in Figure 2, the engaging portion 50 engages with the free opening 79 of the holder mounting portion 10. Particularly as shown in the cross-sectional view according to Figure 11, the engaging portion 50 is weakened on its outer and inner circumference by grooves 52 and 54, so that these grooves are incorporated into the circumferential surrounding wall 56 of the engaging portion 50, thereby so that each groove path of the grooves can also be configured to be interrupted. The mounting flange 34 is fixed to the end face and part of the holder mounting portion 10 by engaging screws 42. Furthermore, the mounting flange 34 has an additional flat contact surface 58 on its opposite end face for associated contact with the flat contact surface 60 on the adjacent end face of the holder mounting portion 10.

[0024] As can be seen particularly in Figure 3b, the holder 12 has a predetermined diameter fitting diameter portion 64 beneath the disc-shaped support plate 62 having the previously described Weldon structure, and this fitting diameter portion can be configured to have a break, which interacts in a precise fit with the adjacent machined centering surface 66 on the inner circumference side of the mounting flange 34. In this way, the holder 12 is precisely positioned within the holder mounting portion 10 via flat, contacting and fitting surfaces. In contrast, as shown particularly in Figure 2, the holder 12 is guided circumferentially with play ("air") along the inner circumference surface 70 of the holder mounting portion 10 in the direction of the other free end surface 68. In particular, a predetermined axial distance is also formed between the other free end surface 68 and the bottom 72 of the holder mounting portion 10, and this axial distance extends transversely with respect to the longitudinal axis or drive axis 74 of the machined system.

[0025] The inner circumferential surface 70 of the holder mounting portion 10 has two cylindrical portions 76 and 78, the cylindrical portion 76 being smaller in free diameter than the cylindrical portion 78, and extending continuously and conically along the inner wall portion 80 in the direction of the opening 79 of the holder mounting portion 10 in terms of diameter. With respect to the outer circumference, the holder mounting portion 10 is stepped in the form of a standard spindle body for mounting within a housing having a corresponding contact point of a driven tool (AGW) in the form of a spindle head (not shown). In this regard, for machining of material by a machining tool in the holder 12, the coolant passage 28 extends in the direction of the holder mounting portion 10 via a corresponding bottom portion 72 by a partial portion 81 and merges with a laterally extending passage portion 82 within the holder mounting portion 10. For angled driven tools, the passage portion 84 is absent, in which case the partial portion 82 continues to the free rear end of the holder mounting portion 10.

[0026] When the cylindrical wall portion 84 on the holder shank 14 engages with the cylindrical portion 78 of the holder mounting portion 10 with play or air, individual spring-loaded pressure pieces 86 are provided on the outer circumference of the holder 12 in this region, preferably positioned opposite each other in the diametrical direction at equal radial distances from each other with respect to the longitudinal axis or drive axis 74, and engage with the corresponding annular groove 88 on the inner circumferential surface 70 of the holder mounting portion 10 in a force-and-form-locking manner, indirectly indicating the complete mounting of the Weldon adapter or holder 12 within the holder mounting portion 10. Preferably, in this process, each pressure piece 86 has a spherical end for latching or release engagement with the annular groove 88 on the inner circumferential surface 70 of the holder mounting portion 10. A circumferential O-seal ring, acting as an annular seal 92, is inserted into the receiving groove 94 of the holder shank 14, with a stepped portion that further follows the cylindrical wall portion 90 of the holder 12. The seal ring 92 provides a seal of the passage portions 28, 81, 82 to the periphery or interior of the driven tool housing in this region.

[0027] Here, the holder 12 having the holder shank 14 will be described in more detail with reference to Figures 3a, 3b, and 4. The four clamping cams 96 are arranged along the cylindrical outer surface of the holder shank 14, grouped in pairs at equal radial distances from each other, and diametrically positioned on opposite sides of the longitudinal axis or drive axis 74. One of the four clamping cams 96 is shown in an enlarged view in Figure 4, and the clamping cam 96 has an inclined portion 98 for sliding the fixing device 16 up and a flat contact surface 100 defined for fixing onto each clamp surface 22 of the fixing device 16, which will be described in more detail below.

[0028] The four clamping cams 96 protrude a predetermined distance above the outer circumferential surface of the holder shank 14 and are positioned between the support plate 62 having a fitting diameter portion 64 and the individual pressure pieces 86, and are therefore located in the central region between the aforementioned components. In addition to the four clamping cams 96, there are also two contact cams 102, only one of which is shown in Figure 3b. The two similarly configured contact cams 102 are positioned diametrically relative to each other at the same radial distance with respect to the longitudinal axis or drive axis 74 and protrude in a parallelepiped shape above the outer circumferential surface of the holder shank 14. Furthermore, the extensions of these contact cams have their central longitudinal axes aligned with a separation plane 104, which separates the inclined portion 98 from the flat clamping surface 100 of the adjacent clamping cam 96. In this regard, the two contact cams 102 are mounted, in axial view, between adjacent clamping cams 96 and the fitting diameter portion 64 on the holder shank 14, with overhangs that substantially correspond to the protrusions of each clamping cam 96.

[0029] Returning to Figure 10, four passage grooves 106 are provided on the inner circumference of the engagement portion 50. These grooves are grouped in pairs and are traversed by both the tightening cam 96 and the mounting cam 102, particularly during the fixing operation of the holder 12 in the mounting portion 10, until the tightening cam 96 disengages from the passage grooves 106. However, the two mounting cams 102 remain held with play within the associated rectangular passage grooves 106, and as a result, torque is transmitted to the holder 12 as soon as the mounting portion 10 is driven to rotate by the combination of the passage grooves 106 and the respective mounting cams 102 via the mounting flange 34 firmly connected to the holder mounting portion 10. Preferably, only one passage groove 106 needs to be configured in a precise fit so that the associated contact cam 102 performs torque transmission in the passage groove 106 of this precise fit.

[0030] The cams 96 and 102 are arranged rotationally symmetrically on the holder 12 to prevent imbalance. Furthermore, this symmetry allows the (Weldon) adapter or holder 12 to be inserted regardless of the spindle position (0° / 180°) or the position of the holder mounting portion 12. The number of cams 96 and 102 can be varied depending on the available space and the torque to be transmitted. The symmetrical arrangement of the four clamping cams 96 achieves a uniform angular distribution along the 60° and 120° periphery. Multiple gripping grooves 108, configured differently, can be provided along the outer circumference of the support plate 62, and in particular, an asymmetrical configuration can be used, one of which is shown as a recess in Figures 1, 3a and 3b. In this regard, these gripping grooves 108 are located on the flat end face of the support plate 62, facing each other diametrically with respect to the longitudinal axis or drive axis 74, and pointing toward the other free end face 68 of the holder 12. In this way, the two symmetrically opposed gripping grooves 108 and the position-oriented grip for the tool adapter 12 enable automated replacement for each holder 12. In the cam 96, the force is constant regardless of the number of cams 96. In the cam 102, only the precisely fitted cam 102 engages, and therefore the maximum transmitted torque is constant. In this respect, each cam 102 is configured as a feather key.

[0031] The fixing device 16 will be described in more detail below. The fixing device 16 includes a crown gear 110, as shown in more detail in Figures 5 and 6. The crown gear 110 has a contact surface 112 for planar contact with a further flat contact surface 113 of the mounting flange 34.

[0032] The flat contact surface 113 is formed from four partial surfaces 115, which are configured to be curved and extend along the inner circumference of the four individual webs 117. Each partial surface 115 is part of a clamp or arched guide, and its free end converges in pairs toward the cylindrical central opening 119 of the engagement portion 50. Multiple protruding ends of the guide as part of each partial surface 115 define an opening between them, the free width of which corresponds to the width of each passage groove 106, and further oriented so that its axis is parallel to each passage groove 106. All partial surfaces 115 extend to a common, interrupted contact surface that extends transversely to the longitudinal axis or drive axis 74. Furthermore, partial surfaces 115 extending along the virtual inner ring 121 form the free end faces of the engagement portion 50. Further partial surfaces extend outward, clamping an outer, virtual annular surface 123 that is axially recessed from the foremost partial surface 151.

[0033] Furthermore, in the initial state shown as reference no. 0 (Figure 9), the crown gear 110 has a groove-shaped through-opening 114 that overlaps with the aforementioned passage groove 106 of the mounting flange 34. Two tooth profiles 116 are arranged in a curved form between the paired and grouped through-openings 114, with the two tooth profiles 116 projecting axially across the contact surface 112. Four webs 118 are arranged in pairs on the opposite side of the crown gear 110, each having a different circumference. These webs have flat contact surfaces 22 along their free end faces that interact with the surfaces 98, 100 of the clamping cam 96, which will be described in more detail below. In addition, the crown gear 110 has an annular or support surface 120 on the opposite side of the tooth profiles 116, which is in contact with the stepped annular surface 122 (Figure 1) on the inside of the holder mounting portion 10 and is set back by a predetermined axial distance from the opening 79 of the holder mounting portion 10. The crown gear 110 can be rotated back and forth along the annular surface 122 of the holder mounting portion 10 about the longitudinal axis or drive axis 74. As can be seen further in Figure 6, each flat contact surface 22 is provided with a radius at the transition point to one of its free end faces to slide up each inclined portion 98 of the clamping cam 96, and this sliding motion continues until the flat contact surface 100 of each clamping cam 96 makes flat contact with the flat contact surface 22 of each web 118. For better explanation, the corresponding radii are enclosed by a circle indicated by reference numeral Z at one point.

[0034] Each tooth profile 116 of the crown gear 110 has a pinion tooth 146 that engages with the respective tooth profile 116 of the crown gear 110. Each tooth profile 116 of the crown gear 110 is assigned a pinion drive unit 144, so that the pinion teeth 146 only need to be positioned partially along the outer circumference of the pinion drive unit 144. Viewed from the direction of Figure 8, each pinion drive unit 144 has a groove-shaped recess 148 on its circumferential surface above it, which serves for the engagement of one of two stop pins 46, these stop pins holding each pinion drive unit 144 in its position within the mounting flange 34 and holding it within a hole 150 along the flange-widened outer circumference 151 of the holder mounting unit 10. In this way, when the holder mounting unit 10 with the holder 12 is rotationally driven, each pinion drive unit 144 cannot be disengaged from its associated mounting unit. The installed state is shown in a partially enlarged view in Figure 7. Figure 7 shows the circular portion indicated by reference numeral Y in Figure 2. In particular, the two stop pins 46 can be unscrewed to release each pinion drive unit 144 from the associated hole 48. As can be seen further from Figure 8, each pinion drive unit 144 has a handle 152 on its free end face, which serves to engage an operating tool not shown in detail, for example, in the form of a hexagonal socket wrench. Furthermore, the pinion drive unit 144 has a blocking tab 154 projecting outward, which is guided within a cam guide 156 in the outer peripheral flange 151 of the holder mounting portion 10, as shown in Figure 9. In this case, reference numeral 0 represents the non-operating position, and position 1 represents the operating position, in which the crown gear 110 rotates so that the flat clamping surface 100 of the clamping cam 96 contacts the contact surface 22 of the crown gear 110 in a planar manner. The pinion drive unit 144 shown in Figure 8 is inserted into the corresponding recess of the holder mounting portion 10, and in this process passes through two semi-shell-shaped recesses 158 of the mounting flange 34, thereby forming the actuator 18 as a whole to rotate the crown gear 110 from the non-operating position 0 to the operating position 1 and from the operating position 1 to the non-operating position 0 as desired.

[0035] Advantageously, two pinion drive units 144 are provided for the machining system so that the holder can be replaced from different, particularly opposite, positions. Thus, the ambiguity of the spindle position in the form of the holder mounting unit 10 is limited to two positions (0° / 180°). In this regard, the machining system is therefore constructed with two drive points offset by 180° in the form of the pinion drive units 144. The gear meshing between each pinion tooth 146 and the tooth profile 116 of the crown gear 110 is selected such that one gear pair is always the drive pair, while the second pinion shaft, which does not receive torque, is the driven component, i.e., driven at its respective position. In this way, as part of an automated operation, the Weldon adapter or holder 12 can be inserted regardless of its position (0° / 180°) and the clamping mechanism can be activated. The aforementioned division can be extended without being limited by any linear divider, so automation can be basically carried out with dividers 2, 4, 6, 8, ... However, for cost reasons, as in this example, selecting a single divider 2 is particularly economical, as it combines the lowest machining effort with the greatest advantage that the system can operate or be used at the desired position without being heavily dependent on its direction. Ultimately, holder 12 can be used regardless of position (0° / 180°), driven tool (AGW), or spindle position.

[0036] In the fixing operation, the holder 12 will be inserted into the holder mounting portion 10 as described. The holder 12 is inserted by a purely linear movement coaxial with the longitudinal axis or drive axis 74. The passage groove 106 of the mounting flange 34 and the grooved through-opening 114 of the crown gear 110 must be aligned with each other so that when the pinion drive unit 144 is in position 0, the clamping cam 96 is located on the side of the web 118 of the crown gear 110. As soon as the holder 12 is inserted into the holder mounting portion 10 in this manner, the crown gear 110 is rotated by the pinion drive unit 144 provided for this purpose. The pinion drive unit 144 shown in Figure 9 is rotated clockwise from position 0 to position 1, and as a result, the associated pinion teeth 146 are also moved clockwise, and the resulting rotational motion is equally transmitted to the crown gear 110 via the respective tooth profiles 116 that engage with the pinion teeth 146 of the actuated pinion drive unit 144. During the rotational motion of the crown gear 110, in order to secure the holder 12 within the holder mounting portion 10, the inclined portion 98 of each clamping cam 96 slides over the associated web 118 over a radius indicated by reference numeral Z until the next flat contact surface 100 of the clamping cam 96 contacts the flat contact surface 22 of the associated web 118. In the corresponding locking operation, each web 118 having its flat contact surface 22 is pressed over the adjacent clamping cam 96, first across the inclined portion 98, then across the flat clamping surface 100, during the rotational or rotatable motion of the crown gear 110.

[0037] The possible clamping path is restricted by a blocking tab 154 on the pinion drive unit 144, which then collides with a limiting portion in the cam guide 156 within the holder mounting portion 10. However, not only is the clamping path restricted, but excess torque is also dissipated through the clamping path during processing, and as a result, the torque-reactive support formed in this respect protects the tooth pairs 146, 116 from overloading. Thus, the crown gear 110 is rotated further until it reaches its stop portion, thereby pressing each clamping surface 22 of the crown gear 110 against the corresponding flat clamping surface 100 of the tool adapter or holder 12. The fact that the flat surfaces 22, 100 are in contact generates a specified clamping force, and the holder 12 is fixed within the holder mounting portion 10 with a predetermined retraction force. The torque-reactive support mentioned can be generated by an actuator 18 that works in conjunction with the blocking tab 154, and by a stop pin 46 that works in conjunction with the actuator 18.

[0038] The clamping operation and the generation of clamping force are made possible by the fact that the dimension A between the outer boundary of the mounting flange 34 and the crown gear 110 when the operating position 0 is released is greater than the dimension B between the flat contact surface 36 of the mounting flange 34 and the flat surface 100 of each cam 26 in the fixed operating position 1. As the two inclined portions slide upward toward each other in the form of web radii on the web 118 and the inclined portion 98 of each clamping cam 96, the mounting flange 34 elastically deforms, and the incorporated radial grooves 52, 54 assist in the deformation movement. This is because, at the end of the rotational operation of the crown gear 110, the clamping surface 22 of the crown gear 110 and the clamping surface 100 of the cam 26 are placed flat against each other with preloads applied, always producing the same elastic deformation, thereby always generating a specified retraction force. In the sense of "action-reaction," the retraction force acting on the bottom of the holder mounting portion simultaneously acts on the mounting flange 34, and in this process, the aforementioned deformation force increases the clamping or retraction force as part of the elastic clamping by the mounting flange 34.

[0039] Next, the release operation for the holder 12 is performed in the opposite direction to the clamping operation, that is, the pinion drive unit 144 is rotated in the opposite direction so that the two clamping surfaces 22, 100 of the crown gear 110 or each cam 26 slide away from each other, and the mounting flange 34 returns to its original shape due to its inherent elasticity by releasing the corresponding connection.

[0040] When the crown gear 110 is returned to its stop position 0 via its respective pinion drive unit 144, the recess 114 of the crown gear 110 and the passage groove 106 of the mounting flange 34 are re-aligned, and the holder 12 can be removed from the holder mounting portion 10 in the spindle head by purely linear movement along the axis 74. The aforementioned release and removal operations can be performed both manually and automatically. The machining system according to the present invention makes it possible to provide holders 12 for receiving machining tools or collets in various different spindle heads in order to perform machining within a desired range. This is not equivalent to the prior art.

Claims

1. In machining systems, The machining system comprises at least a drivable holder mounting portion (10) and a holder (12) provided for receiving a machining tool. The holder (12) is equipped with a holder shank (14) and can be replaced and fixed within the holder mounting portion (10) by a fixing device (16). The fixing device (16) is movable from the released position to the fixed position by the actuator (18) during fixing or release operations, and is also movable from the fixed position to the released position. At this position, each holder (12) can be guided so that it can be inserted into and removed again from the holder mounting portion (10), or, at the insertion position, the holder (12) can be guided so that it is held within the holder mounting portion (10) and pulled in with a predetermined pulling force. In a machining system, the holder (12) has at least one clamping cam (96) positioned on the holder shank (14), and the at least one clamping cam (96) is configured to come into contact with or not come into contact with the associated clamping surface of the fixing device (16) during fixing or releasing operations. The machining system is characterized in that the holder mounting portion (10) has an elastic flexibility compensation device (24), and the elastic flexibility compensation device (24) enables tolerance compensation between the holder mounting portion (10) and the received holder (12) at least in the fixed position.

2. The aforementioned elastic flexibility compensation device (24) is A mounting flange (34) having at least one flat contact surface (36) positioned on its end face to contact the correspondingly configured flat contact surface (38) of the holder (12), The machining system according to claim 1, further comprising: an engaging portion (50) that engages in the direction of the fixing device (16) within the holder mounting portion (10) and whose wall profile is weakened by at least one groove (52, 54).

3. The machining system according to claim 1 or 2, characterized in that the mounting flange (34) is located on the holder mounting portion (10) and fixed as part of the holder mounting portion (10), and has a further flat contact surface (58) on its opposite end face for connecting with an adjacent flat contact surface (60) of the holder mounting portion (10).

4. The machining system according to any one of claims 1 to 3, characterized in that the holder (12) has at least one fitting diameter portion (64) that interacts with the inner circumference centering surface (66) of the mounting flange (34).

5. The machining system according to any one of claims 1 to 4, characterized in that the holder (12) is guided with circumferential play along the inner circumferential surface (70) of the holder mounting portion (10) in the direction of the other free end face (68) on the inner circumferential side.

6. The aforementioned fixing device (16) is equipped with a crown gear (110), The crown gear (110) is A contact surface (112) for contacting a further flat contact surface (113) of the mounting flange (34), Each of the holders (12) is provided with a flat contact surface (22) for contacting the clamping surface (100) of a tightening cam (96) that can be assigned to it. The machining system according to any one of claims 1 to 5, characterized in that the clamping cam (96) comprises an inclined portion (98) for sliding up on the flat contact surface (22) of the crown gear (110) and a flat clamping surface (100) for clamping the flat contact surface (22) of the crown gear (110).

7. The machining system according to any one of claims 1 to 6, characterized in that, during the fixing operation, when each of the clamping cams (96) of the holder (12) slides on the flat contact surface (22) of the crown gear (110), the elastic flexibility compensation device deforms, and in this process, the clamping operation between the holder (12) and the holder mounting portion (10) is promoted.

8. The machining system according to any one of claims 1 to 7, wherein the actuator (18) for the crown gear (110) surrounding the holder (12) comprises at least one pinion drive unit (144) that passes through the holder mounting unit (10) when the holder (12) is received by the holder mounting unit (10) when the holder (12) is inserted into the holder mounting unit (10).

9. A machining system according to any one of claims 1 to 8, characterized in that a pressure piece (86) is incorporated on the outer circumference toward the other free end face (68) of the holder (12), and the pressure piece engages with the associated annular groove (88) of the holder mounting portion (10) when the holder (12) is in a fixed state, and subsequently the annular seal (92) is received within the holder (12).

10. The machining system according to any one of claims 1 to 9, characterized in that torque response support is achieved by interaction between the actuator (18) and the stop pin (46) on the mounting flange (34) and / or the blocking tab (154) of the pinion drive unit (144).

11. A holder mounting portion, in particular a holder mounting portion for an actuator according to any one of claims 1 to 10, The holder mounting portion is characterized in that it has an elastic flexibility compensation device (24) on one of its free end faces (68), and the elastic flexibility compensation device (24) enables tolerance compensation between the holder mounting portion (10) and the received holder (12) at at least one fixed position.

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