EP2331289A1

EP2331289A1 - Tooling device and machine tool

Info

Publication number: EP2331289A1
Application number: EP09783048A
Authority: EP
Inventors: Martin Schmid
Original assignee: MAG IAS GmbH Eislingen
Current assignee: MAG IAS GmbH Eislingen
Priority date: 2008-09-18
Filing date: 2009-09-15
Publication date: 2011-06-15
Also published as: US20110214267A1; CN102164707A; WO2010031774A1; DE102008049520A1

Abstract

A tooling device for a machine tool is provided, comprising at least one interface for fluid, at least one piston device with a first piston surface that is in fluidic connection with the at least one interface for fluid, and with a second piston surface opposite to the first piston surface, a resetting device that acts on the second piston surface, and a workpiece machining device that is coupled to the at least one piston device, wherein the at least one piston device can be moved and positioned as a result of the force applied by the fluid.

Description

Tool device and machine tool

The invention relates to a tool device for a machine tool.

The invention further relates to a machine tool comprising at least one tool carrier.

From German patent application DE 10 2007 045 045 A1, a machine tool is known, which has a tool carrier with a carrier-side coolant lubricant interface for supplying a honing tool with a water-mixed cooling lubricant.

From WO 2006/136361 Al a valve seat and Ventilführungsbearbei- tool for fine machining of valve seat and valve guide in a cylinder head of an internal combustion engine is known. This tool comprises at least two sub-tools, of which a first has at least one geometrically determined cutting edge and is associated with the valve seat machining. A second part tool has at least one geometrically determined cutting edge and is assigned to the valve guide machining.

The prospectus "MAPAL / ISOTOOL, Steering Tools and Facing Heads, Model METAV 2006" describes a valve seat and valve guide, which allows the valve seats to be rotated and valve bushings to be produced by rubbing. A pinole movement takes place independently of the feed movement of the basic tool.

From DE 37 37 024 Al a drilling device in particular for core drilling, consisting of drill stand with foot and drive known. At one foot, designed as a pressure cylinder stand is arranged, the a guide shaft with centering tip, a drill shaft with drill bit, a feed device and a cooling device encloses, on the front side a plate with drive unit releasably secured and the opposite side is provided with a sealing device.

From DE 198 59 051 Al a tool for chip removal machining of a workpiece for producing a non-planar surface, in particular a valve seat, with a at least one of a holder-mounted blade plate having base body, a relative to the body displaceable part tool, one with the holder over a coupling device cooperating actuator known. The coupling device comprises an eccentric, which is rotatable by means of the actuating device about an offset relative to the central axis of the tool axis.

The invention has for its object to provide a tool device for a machine tool, by means of which can be carried out a workpiece machining, for example via a feed movement in a simple manner.

This object is achieved according to the invention in that the tool device comprises at least one interface for fluid, comprising at least one piston device with a first piston surface, which is in fluid communication with the at least one interface for fluid, and with a second piston surface, which is the first Piston surface is opposite, comprises a restoring device, which acts on the second piston surface, and a workpiece processing device, which is coupled to the at least one piston device, wherein the at least one piston device is movable and positionable by application of force via the fluid.

In the solution according to the invention, workpiece machining can be carried out in a fluid-controlled manner. The at least one piston device can be move fluid controlled. For example, an already existing interface for coolant, lubricant or compressed air can be used for a feed movement of a workpiece processing device.

By the restoring device, a restoring force is provided, through which a piston device can be reset after a feed movement in a simple manner. The basic position of the piston device (without fluid admission) is preferably defined by the restoring device.

The tool device can be formed in a simple and compact way. In particular, no additional electrical power connection must be provided. The movement of the piston device can take place independently of the movement of a tool carrier which holds the tool device. It is also possible to use a plurality of piston devices on a tool device in order, for example, to provide a combination tool.

It is then possible, for example, to machine a valve guide on a workpiece via a tool device and to machine a valve seat without re-tensioning of the workpiece. For example, it is also possible to perform a roughing and a fine machining on a workpiece in the same setting using a suitable combination tool.

For example, the workpiece processing device comprises a tool area for turning, reaming, drilling, stinging, foreheading or threading. This makes it possible to carry out extensive machining operations depending on the design of the tool device. A corresponding machine tool and in particular a machining center can thereby be used variably. Conveniently, the at least one piston device is linearly movable. As a result, the tool device can be formed in a simple manner.

Advantageously, a movement axis of a linear mobility of the at least one piston device is parallel or coaxial with an axis of rotation of the tool device as a whole. As a result, a tool device with an internal feed mobility can be realized in a simple manner, wherein the tool device as a whole is rotatable.

In particular, the first piston surface and / or the second piston surface are oriented transversely and in particular perpendicular to a movement axis of a linear mobility of the at least one piston device. This results in an optimized controllability and in particular fluid controllability of the movement and positioning of the piston device.

In the solution according to the invention, the movement and / or positioning of the at least one piston device is fluid-controlled. An existing interface for coolant or compressed air for moving and / or positioning the at least one piston device and thus a tool region, which carries out the actual workpiece machining, can be realized.

The at least one interface for fluid is in particular an interface for coolant or for compressed air.

Advantageously, fluid provided via the at least one interface for fluid exerts a pressure force for moving and positioning the at least one piston device and the restoring device provides a force counteracting this force. If, for example, the fluid supply is switched off or the pressure in the fluid is reduced, then the restoring device automatically ensures a return. Conveniently, the workpiece processing device is movable by the at least one piston device. This allows a defined workpiece machining operation to be performed. For example, a processing can be carried out by rubbing or stinging.

It can be provided that the workpiece processing device can be moved by the at least one piston device. As a result, for example, a turning operation can be performed. As a result, for example, a chamfer on a valve seat can be produced in a simple manner.

In one embodiment or within a tool device, the workpiece processing device can be held by the at least one piston device. A movement of the corresponding piston device manifests itself directly in a corresponding movement of the workpiece processing device.

It is also possible for the workpiece machining device to be movable in a linear movement direction by the action of the at least one piston device, which is at an acute angle to a linear movement direction of the at least one piston device. In this case, the piston device is a direct drive for the workpiece processing device. This makes it easy to implement a delivery movement of the workpiece processing device to an axis of the tool device, wherein the corresponding tool device can be formed with small diameter dimensions.

In particular, the workpiece processing device is then held or formed on a guide device whose movement and positioning is controlled by the at least one piston device. The piston device can be moved and positioned directly under fluid control. This movement and positioning directly causes movement and positioning of the guide device. The guide device expediently has a return device. This makes it possible, for example, that a sliding guide of the guide device and the piston device is provided to each other. If the piston device is moved back (which may in principle result in a loss of contact), then the return device can ensure that the guide device is pressed against the piston device and thereby the sliding contact is not lost.

In a structurally favorable embodiment, the at least one piston device has a first ramp surface and the guide device has a second ramp surface, wherein the first ramp surface acts on the second ramp surface and orients the first ramp surface and the second ramp surface at an acute angle to a linear movement direction of the at least one piston device are. Preferably, the first ramp surfaces and the second ramp surfaces slide against each other. About the ramp surface can change a direction of movement; the direction of movement of the piston device can be converted into a direction of movement of the guide device, which lies at an angle to the direction of movement of the piston device.

It is favorable if the restoring devices comprise one or more springs, in particular mechanical springs. This makes it easy to achieve a provision. It is thus also possible, if the spring force is selected accordingly, that the at least one piston device is automatically in a starting position and an active fluid loading is necessary in order to achieve a feed movement from this starting position out.

In one embodiment, a combination tool is formed by having a first piston means fluidly communicating with a first interface for fluid and to which a first workpiece processor is coupled, and second piston means fluidly operable with a second interface. point for fluid is in communication and to which a second workpiece processing device is coupled. As a result, different machining operations on the same workpiece can be carried out in particular successively via the first workpiece machining device and the second workpiece machining device. For example, a valve guide machining and a valve seat machining on the same workpiece is successively possible. It can then be carried out a workpiece machining in the same clamping. The position movements of the workpiece or a workpiece carrier can be minimized thereby. This can be done time-saving workpiece machining. It can also achieve a high accuracy.

It can be provided that the second piston device surrounds the first piston device. As a result, a tool device with small dimensions can be realized.

In one exemplary embodiment, the first workpiece machining device is designed for machining a valve guide and / or the second workpiece machining device is designed for machining a valve seat. For example, then the first workpiece processing device comprises a friction tool for fine machining of valve guides. The second workpiece processing device comprises one or more geometrically defined cutting edges for turning a valve seat and in particular for producing chamfers on the valve seat.

The invention is further based on the object to provide a machine tool of the type mentioned, which is universally applicable.

According to the invention, this object is achieved in the machine tool mentioned at the outset in that it comprises at least one tool carrier which comprises at least one interface for fluid and on which a tool device according to the invention is held, wherein the at least one interface for fluid of the at least one tool carrier is in fluidly effective connection with the at least one interface for fluid of the tool device.

In the solution according to the invention, a forward thrust movement of a tool via the tool device can be achieved in a simple manner, wherein the drive of the advancing movement is fluid-controlled. The feed motion can be done without relative movement of the tool carrier and the workpiece.

The machine tool according to the invention has the advantages mentioned in connection with the tool device according to the invention.

In particular, the at least one interface for fluid of the at least one tool carrier is an interface for coolant, lubricant or compressed air.

Preferably, the at least one tool carrier is designed as a tool spindle, on which a fixed tool device is rotatable about a rotation axis. The tool device can thereby be rotated as a whole. Within the tool device, a feed movement of a tool region can be realized via a fluid-controlled piston device.

Preferably, the at least one tool carrier is linearly movable relative to a workpiece carrier at least in one direction.

A tool device according to the invention and a machine tool according to the invention can be used in an advantageous manner for machining valve guides and valve seats.

The following description of preferred embodiments is used in conjunction with the drawings for further explanation of the invention. Show it : Figure 1 is a plan view of an embodiment of a machine tool according to the invention (without workspace trim);

Figure 2 is a schematic sectional view of an embodiment of a tool device according to the invention; and

Figure 3 is a schematic representation of a valve assembly on a

Combustion engine.

An embodiment of a machine tool according to the invention is a machining center. An embodiment of a machining center, which is shown schematically in FIG. 1 in a partial representation and designated therein by 10, comprises a machine bed 12, on which a machine frame 14 is arranged. The machine frame 14 is formed portal-like and protrudes in a vertical direction relative to the direction of gravity over the machine bed 12 addition. On the machine frame 14, a tool carrier device 16 is held, which comprises at least one tool carrier 18.

In the embodiment shown, the tool carrier device 16 comprises a first tool carrier 18a and a second tool carrier 18b. The tool carriers 18a and 18b are designed as tool spindles. A tool held on the respective tool carrier 18a, 18b is rotatable about a rotation axis 20a, 20b. In the

Representation of Figure 1 are the axes of rotation 20a, 20b parallel to each other. They are oriented parallel to a Z-direction, which is perpendicular to the plane of the drawing in the representation of Figure 1. The Z-direction is in relation to the direction of gravity in particular a horizontal direction.

The tool carrier device 16 is designed as a carriage, which is held on a slide guide 24 and via the slide guide 24 in a Y-direction (direction and opposite direction) is linearly movable. The Y-direction is transverse and in particular perpendicular to the Z-direction. With respect to the direction of gravity, the Y direction is particularly a vertical direction.

For driving the movement of the carriage 22 in the Y direction and for its positioning, the carriage 22 is associated with a drive device 26. This can for example comprise a ball screw or a linear motor.

The carriage 22 is itself held on a carriage 28, which in a X-direction (direction and opposite direction) on a carriage guide 30 is linearly displaceable. For displacement and positioning a corresponding drive is provided. The X-direction is transverse and in particular perpendicular to the Y-direction and the Z-direction. The X-direction is particularly a horizontal direction with respect to the direction of gravity.

The tool carrier 16 is thereby movable in the X-direction and the Y-direction relative to the machine frame 14.

On the machine bed 12 (at least) a workpiece carrier 32 is arranged. The first tool holder 18a and the second tool holder 18b and tools held thereon and the workpiece carrier 32 are movable relative to each other in the Z direction (direction and opposite direction). In one embodiment, the tool carriers 18a, 18b are not movable in the Z direction for machining a workpiece, and the workpiece carrier 32 is slidably supported on the machine bed 12 in the Z direction. The workpiece carrier 32 is assigned to a drive. In an alternative embodiment, the first tool carrier 18a and the second tool carrier 18b are slidably held on the tool carrier 16 to enable Z-displacement. It is also possible to combine a Z-displaceability of the tool carriers 18a, 18b on the tool carrier device 16 and a Z-displaceability of the workpiece carrier 32 on the machine bed 12.

It can also be provided, for example, that the workpiece carrier 32 is rotatable about an example vertical axis.

In the exemplary embodiment shown, the machining center 10 has a bearing device 34 for tools 36, which is arranged above a working chamber 38 in which workpieces are machined.

Furthermore, a tool changing device 40 is provided, via which tools can be used on the tool carriers 18a and 18b and can be removed therefrom.

The machining center 10 may also comprise only a single tool carrier or comprise more than two tool carriers.

A respective tool carrier 18 has an interface 42 for fixing a tool device 44. The interface 42 is designed, for example, as an HKS interface. The tool device 44 as a whole can be rotated about the corresponding tool carrier 18 about a rotation axis 46.

A tool carrier 18 also has (at least) an interface for fluid. Fluid is understood here to mean generally flowable substances. Examples of fluids are coolants, lubricants and compressed air. In one embodiment of a tool device 44 according to the invention (FIG. 2), a first interface 48 for fluid and a second interface 50 for fluid are provided. The first interface 48 is, for example, an interface for coolant (which may also have lubricant function), which can be provided via this first interface 48 of the tool device 44. The second interface 50 is for example an interface for compressed air, via which the tool device 44 compressed air can be provided. Accordingly, the tooling device 44 has a first interface 52 for fluid and a second interface 54 for fluid. The first interface 48 of the tool carrier 18 can be connected to the first interface 52 of the tool device 44 in a fluid-effective connection. Furthermore, the second interface 50 of the tool carrier 18 can be coupled to the second interface 54 of the tool device 44. The first interface 48 and the second interface 50 are preferably designed such that a fluid control of the tool device 44 is possible via them.

The tool device 44 has an axis 56 which is coaxial with the axis of rotation 46 when the tool device 44 is fixed to the tool carrier 18.

The tool device 44 comprises a first piston device 58 having a first piston surface 60 and a second piston surface 62 opposite the first piston surface. The first piston surface 60 is in fluid communication with the first interface 52 for fluid. The second piston surface 62 is fluid-effectively separated from this first interface 52.

Before the first piston surface 60, a fluid distribution chamber 64 is arranged, via which a pressurization of the first piston surface 60 with fluid, which is provided via the first interface 48 of the tool carrier 18, takes place. The first interface 52 for fluid has an opening which opens into the fluid distribution chamber 64.

In front of the first piston surface 60, a diaphragm 66 is arranged, which prevents fluid can directly act on the first piston surface 60.

The first piston device 58 is guided linearly displaceably on a guide device 68. A linear movement direction 70 (direction and counter direction) is parallel or coaxial with the axis 56 and thereby parallel or coaxial with the axis of rotation 46th

The guide device 68 is formed, for example, by a piston receptacle 72. The piston receptacle 72 in this case has an end wall 74, which faces away from the first piston surface 60 and faces the second piston surface 62. Between the end wall 74 and the second piston surface 62, a return device 76 is arranged, which exerts a force on the second piston surface 62, which is oriented in the direction of the second piston surface 62 to the first piston surface 60 and is oriented parallel to the axis 56. Fluid coupled via the first interface 52 exerts a force on the first piston surface 60 oriented in a direction parallel to the axis 56 from the first piston surface 60 to the second piston surface 62.

The restoring device 76 is designed in particular as an elastic device and comprises one or more mechanical springs, wherein, when a spring is provided, this is supported on the end wall 74 and the second piston surface 62.

For example, in principle it is also possible for the return device 76 to be designed as a gas spring.

A space 80, in which the restoring device 76 is arranged, is fluid-tightly separated from the fluid distribution space 64.

The first piston device 58 holds a first workpiece processing device 82, via which a workpiece machining takes place. The workpiece processing device 82 is the actual tool, which acts on a workpiece directly mechanically.

The workpiece processing device comprises a tool region 84. This tool region 84 is about the tool carrier 18 about the rotation Rotation axis 46 rotatable. About the linear mobility of the first piston means 58, it is displaceable in the linear movement direction 70.

The tool area 84, for example, a tool area for turning, rubbing, drilling, stinging, forehead or threads on a workpiece.

In the embodiment shown in Figure 2, the tool area is a Reibwerkzeugbereich. Valve guides 86 (FIG. 2, FIG. 3), for example, can be machined with such a reaming tool region.

The first interface 48 and also the first interface 52 are preferably designed so that the tool region 84 can be supplied with coolant.

In the case of the first piston device 58, the first workpiece machining device 82 is held firmly on the piston device and thereby aligned at least approximately coaxially with the axis 56. As a result of the fixation on the first piston device 58, the first workpiece processing device 82 directly follows each movement of the first piston device 58.

The tooling device 44 further comprises a second piston device 88. This surrounds the first piston device 58.

The second piston device 88 is displaceably guided on a guide device 90 in a linear movement direction 92 (direction and opposite direction). The linear movement direction 92 is parallel to the linear movement direction 70.

The guide device 90 is formed, for example, as an external guide; the first piston device 58 is disposed in a housing 94, and an outer side 96 of the housing or a device connected directly to the outer side 96 forms a sliding surface for the second piston device 88. The second piston device 88 has a first piston surface 98, which is in fluid-effective connection with the second interface 54 of the tool device 44. In front of the first piston surface 98, a fluid distribution chamber 100 is formed. For example, from the second interface 54, a fluid line 102 leads into the fluid distribution chamber 100 for coupling into this fluid and for causing pressurization of the first piston surface 98 to move and position the second piston device 88.

The second piston device has a second piston surface 104. Between the second piston surface 104 and the first piston surface 98, a stationary wall 106 is arranged. This wall has a first side 108 a, which faces the first piston surface 98, and a second side 108 b, which faces the second piston surface 104. The wall 106 is disposed on the housing 94, being oriented in a direction transverse and in particular perpendicular to the axis 56. The first side 108a of the wall 106 bounds (together with the first piston surface 98) the fluid distribution chamber 100. The fluid line 102 opens between the first piston surface 98 and wall 106 in the fluid distribution chamber 100 such that in each position of the second piston device 88 is a coupling of Fluid in the fluid distribution chamber 100 is possible.

Between the second side 108b and the second piston surface 104, a space 110 is formed, in which a restoring device 112 is arranged. The return device 112 provides a force having a direction of force from the first piston surface 98 away from the second piston surface 104. A compressive force of the fluid in the fluid distribution chamber 100 acts in a direction away from the second piston surface 104 toward the first piston surface 98.

The restoring device 112 is designed in particular as an elastic device and comprises, for example, one or more mechanical springs. If a spring is provided, then this is supported on the second side 108 b of the wall 106 and the second piston surface 104 from.

It is also possible in principle for the restoring device 112 to be designed, for example, as a gas spring.

The second piston device 88 has a first ramp surface 114 on a front side (which faces away from the tool carrier 18). This is oriented at an acute angle 116.

There is provided a guide device 118, which holds a second workpiece processing device 120. The guide device 118 is linearly displaceable in a linear movement direction 122. In this case, the linear movement direction 122 lies at an acute angle to the linear movement direction 92, this acute angle corresponding in magnitude to the angle 116.

The guide device 118 has a second ramp surface 124, which is oriented at the acute angle 116 to the linear movement direction 92 and is aligned parallel to the first ramp surface 114. During an advancing movement of the second piston device 88, the first ramp surface 114 acts on the second ramp surface 124 of the guide device 118. As a result, the guide device 118 with the second workpiece machining device 120 is displaced in the direction of the axis 56 in the linear displacement direction 122. As a result, the second workpiece processing device 120 can be provided with a corresponding tool region 126 to a workpiece. It is thereby possible, for example, a turning on a workpiece.

The second ramp surface 124 is slidably mounted on the first ramp surface 114, wherein lubrication occurs, for example, via coolant. Accordingly, a coolant supply of the sliding surfaces is provided. For example, a valve seat 128 (FIGS. 2, 3) can be machined.

The second piston device 88 is not rigidly connected to the guide device 118, but pushes it to some extent on the action of the first ramp surface 114 on the second ramp surface 124th

The guide device 118 comprises a restoring device 130. The restoring device 130 has, for example, one or more mechanical springs 132. A corresponding spring 132 is supported on the movable guide device 118 and furthermore has a support 134, which is fixed relative to the housing 94, that is to say immovable.

The return device 130 causes a movement of the guide device 118 (and thus the tool area 126) away from the axis 56 when the second piston device 88 has no more sliding force on the guide device 118.

The tooling device 44 according to the invention functions as follows:

The tool device 44 can be releasably fixed to the tool carrier 18 via the mechanical interface 42. During the fixation, a connection of the first interfaces 48 and 52 and the second interfaces 50 and 54 takes place. As a result, a fluid exchange between the machine tool via the tool carrier 18 and the tool device 44 is possible.

In one embodiment, for example, coolant is provided via the first interface 48 under a pressure of the order of, for example, 40 bar. Compressed air is provided via the second interface 50. The fluid loading of the first piston device 58 and the second piston device 88 is controllable.

When the tool device 44 is fixed, it can be rotated as a whole about the axis of rotation 46 in order to be able to carry out workpiece machining. at In this case, a relative mobility in the Z direction between the tool device 44 and a workpiece 136 is possible for the machining center 10.

Without applying fluid to the first piston surface 60 of the first piston device 58, the first piston device 58 is in a first position 138. The first position 138 is predetermined via the return device 76 and a stop on which the restoring device 76 presses the first piston device 58.

By fluidizing the first piston surface 60 via the first interface 52, a fluid-controlled movement and positioning of the first piston device 58 and thus the first workpiece processing device 82 can be achieved. The first piston device 58 can thereby be brought into one or more processing positions, wherein the movement of the first piston device 58 forward from the first position 138 itself can be a machining operation such as a lancing or rubbing process.

In FIG. 2, a second position 140 is schematically indicated, which has been created by displacement of the first piston device 58 from the first position 38.

The pressure force, which results from the application of fluid to the first piston surface 60, must overcome the restoring force of the restoring device 76 and any counterforces in the workpiece machining in order to achieve a feed. When the pressurizing force of the fluid pressurization is below the resultant of these forces, the first piston device 58 is shifted back to the first position 138.

The second piston device 88 can be moved independently of the first piston device 58. The second piston device 88 has a first position 142, which by a restoring force of the return device 112 and a corresponding stop of the second piston device 88 is defined.

The guide device is displaced via the restoring device 130 until the second ramp surface 124 abuts the first ramp surface 114 or, with a corresponding return movement of the second piston device 88, the guide device 118 follows this movement, wherein the first ramp surface 114 defines a contact surface.

If the fluid distribution chamber 100 in particular controlled by fluid such as compressed air is applied, then a corresponding force is exerted on the first piston surface 98, which pushes the second piston device 88 from the first position 142 also forward. Due to the oblique formation of the first ramp surface 114 and contact with the second ramp surface 124, the guide device 118 is displaced in the linear movement direction 122 and thereby a delivery of the tool region 126 to the axis 56 is effected. It can be done by a corresponding workpiece machining.

The pressure force, which is exerted on the first piston surface 98 via fluid, must be so great that the sum of restoring force of the restoring device 112 and any counterforces overcome by the workpiece machining.

If, after completion of the machining operation, the pressure force is reduced (via appropriate control of the fluid loading) and falls below the largest restoring force, then the second piston device 88 is moved back to the first position 142 and thus the tool region 126 is displaced away from the axis 56.

By means of a tool device 44 according to the invention, it is possible, for example, to machine valve guides 86 and valve seats 128 in one clamping through a machining center 10. Valves 144 of an internal combustion engine have a valve head 146, which sits in a valve seat 128 when the valve is closed.

At the valve head 146, a valve rod 148 is arranged. This is guided in a valve guide 86, wherein in the valve guide 86, a bush 150 may be arranged, in which the valve rod 148 is guided.

For example, a valve guide 86 for machining and, in particular, finishing can be used via the first workpiece machining device 82.

After completion of the processing of the valve guide 86, the valve seat 128 can be machined and, in particular, finely machined via the second workpiece processing device 120. This can be done in the same clamping, so that time-saving and accurate machining is possible.

In the embodiment shown, the tooling device 44 is a combination machining tooling device through which at least two machining operations can be performed on a workpiece.

In principle, a large number of different machining processes can be carried out, the machining taking place one after the other. For example, first a rough machining and then a fine machining. As mentioned above, for example, a valve guide can be machined via a reaming tool, for example, and subsequently a valve seat can be turned with a chamfer.

The machine tool provides, via the tool carrier 18, fluid for fluid control of the first workpiece processing device 82 and the second workpiece processing device 120 in their respective linear mobility. As a result, the anyway existing first interface 48 or second interface 50 of the tool carrier 18 can be used by a feed movement or feed movement of tool regions 84 and 126, respectively to reach. The tool device 44 can be designed accordingly simple, since no active drive must be provided on the tool device 44 with its own supply of electrical energy; Any existing interfaces can be used for example for coolant and / or compressed air.

The linear movement of the first piston device 58 and the second piston device 88 takes place independently of a possible Z movement of the tool carrier 18 relative to the workpiece.

In principle, it is also possible to realize an angle setting during processing via an interpolated method.

Claims

claims

A tool device for a machine tool (10), comprising at least one fluid interface (52; 54), at least one piston device (58; 88) having a first piston surface (60; 98) in fluid communication with the at least one interface (58; 52; 54) and a second piston face (62; 104) facing the first piston face (60; 98) has return means (76; 112) acting on the second piston face (60; 98) and a workpiece processing device (82; 120) coupled to the at least one piston device (58; 88), the at least one piston device (58; 88) being movable and positionable by application of force via the fluid.

2. Tool device according to claim 1, characterized in that the workpiece processing device (82; 120) comprises a tool area (84; 126) for turning, rubbing, drilling, piercing, forehead or threads.

3. Tool device according to claim 1 or 2, characterized in that the at least one piston device (58; 88) is linearly movable.

4. Tool device according to one of the preceding claims, characterized in that a movement axis of a linear movement of the at least one piston device (58, 88) is parallel or coaxial to a rotation axis (46) of the tool device as a whole.

5. Tool device according to one of the preceding claims, characterized in that the first piston surface (60; 98) and / or the second piston surface (62; 104) is oriented transversely to a movement axis of a linear mobility of the at least one piston device (58;

6. Tool device according to one of the preceding claims, characterized in that the movement and / or positioning of the at least one piston device (58, 88) is fluid-controlled.

7. Tool device according to one of the preceding claims, characterized in that the at least one interface (52; 54) for fluid is an interface for coolant, lubricant or compressed air.

8. A tool device according to one of the preceding claims, characterized in that fluid which is provided for the fluid via the at least one interface (52; 54) exerts a pressure force for moving and positioning the at least one piston device (58; 88) and the restoring device (76; 112) provides a force counteracting this force.

9. Tool device according to one of the preceding claims, characterized in that the workpiece processing device (82; 120) by the at least one piston device (58; 88) is movable.

10. Tool device according to one of the preceding claims, characterized in that the workpiece processing device (120) by the at least one piston device (88) is deliverable movable.

11. Tool device according to one of the preceding claims, characterized in that the workpiece processing device (82) by the at least one piston device (58) is held.

12. Tool device according to one of claims 1 to 10, characterized in that the workpiece processing device (120) by the action of the at least one piston device (88) in a linear movement direction (122) is movable, which at an acute angle (116) to a Linear movement direction (92) of the at least one piston device (88).

13. Tool device according to claim 12, characterized in that the workpiece processing device (120) is held or formed on a guide device (118) whose movement and positioning is controlled by the at least one piston device (88).

14. Tool device according to claim 13, characterized in that the guide device (118) has a restoring device (130).

15. Tool device according to claim 13 or 14, characterized in that the at least one piston device (58) has a first ramp surface (114) and the guide device (118) has a second ramp surface (124), wherein the first ramp surface (114) on the second Ramp surface (124) acts and the first ramp surface (114) and the second ramp surface (124) at an acute angle (116) to a linear movement direction (92) of the at least one piston device (88) are oriented.

Tooling according to one of the preceding claims, characterized in that the restoring device (76; 112; 130) comprises one or more springs (78; 132).

17. Tool device according to one of the preceding claims, characterized by a first piston device (58) which fluidly connected to a first interface (52) for fluid in communication and to which a first workpiece processing device (82) is coupled, and a second piston device (88) fluidly communicating with a second interface (54) for fluid and to which a second workpiece processing device (120) is coupled.

18. Tool device according to claim 17, characterized in that the second piston device (88) surrounds the first piston device (58).

19. Tool device according to claim 17 or 18, characterized in that the first workpiece machining device (82) for machining a valve guide (86) is formed.

20. Tool device according to one of claims 17 to 19, characterized in that the second workpiece machining device (120) for machining a valve seat (128) is formed.

21. A machine tool comprising at least one tool carrier (18) which comprises at least one interface (48; 50) for fluid and on which a tool device (44) according to one of the preceding claims is held, wherein the at least one interface (48; 50) for fluid of the at least one tool carrier (18) in fluid-effective connection with the at least one interface (52; 54) for fluid of the tool device (44).

22. Machine tool according to claim 21, characterized in that the at least one interface (48; 50) for fluid of the at least one tool carrier (18) is an interface for coolant, lubricant or compressed air.

23. Machine tool according to claim 21 or 22, characterized in that the at least one tool carrier (18) is designed as a tool spindle, on which a fixed tool device (44) about an axis of rotation (46) is rotatable.

24. Machine tool according to one of claims 21 to 23, characterized in that the at least one tool carrier (18) relative to a workpiece carrier (32) in at least one direction linearly movable (X; Y; Z).

25. Use of the tool device according to one of claims 1 to 20 or the machine tool according to one of claims 21 to 24 for machining valve guides and valve seats.