EP3386679A1

EP3386679A1 - Machine tool

Info

Publication number: EP3386679A1
Application number: EP16804713.2A
Authority: EP
Inventors: Stefan Kempter
Original assignee: Roehm GmbH Darmstadt
Current assignee: Roehm GmbH Darmstadt
Priority date: 2015-12-09
Filing date: 2016-11-21
Publication date: 2018-10-17
Also published as: US20180369974A1; WO2017097566A1; DE102015121393A1; JP2019501784A; CN108472778A; KR20180088904A

Abstract

The invention relates to a machine tool comprising a work spindle (2), a base flange (4) for securing on the work spindle (2) as part of a chucking means quick-change system (1) which also comprises a changeover flange (5) that can be connected to the chucking means (3). Conductor sections (46) for data and/or energy transmission are arranged in the work spindle (2), base flange (4), changeover flange (5) and chucking means (6) and coupling members (47) are provided on neighbouring components in the transmission chain, in order to connect the conductor sections (46) to form a conductor.

Description

machine tool

The invention relates to a machine tool with a work spindle, with a provided for attachment to the work spindle base flange as part of a quick-change tooling quick-change system, which further comprises a connectable with the clamping device removable flange.

Such machine tools are known in practice, in which in a conventional manner at the free end of the work spindle

Screw the chuck body of a chuck is attached. The type of attachment requires that when set by the user change of the chuck high set-up times incurred, so that now in commercial use clamping device quick-change systems are used in which the base flange is connected to the work spindle. This base flange is designed such that a releasable connection can be made to one of a plurality of flanges, the alternating flanges each carrying different clamping means. With such a quick-change tooling system, as described, for example, in DE 10 2013 216 179 A1, the set-up times can be reduced and therefore relatively frequently replace the clamping means with another. After the replacement, however, adjustments must be made to the clamping device currently in use via the machine control in order, for example, to avoid exceeding the maximum actuating force or the maximum rotational speed.

The invention is therefore based on the object at a

Machine tool of the type mentioned to increase the reliability. This object is achieved in a machine tool of the type mentioned above in that in the work spindle, the base flange, the flange and the clamping means line sections for data and / or energy transmission are arranged, and that in the

Transmission chain adjacent components coupling members are provided for connecting the line sections to a line.

The advantage associated with a machine tool designed in this way is that data provided in the clamping device or acquired by the clamping device can be transmitted via the line sections combined to a line to the machine tool and there in particular to the machine control, so that when replacing the clamping device in terms of "Plug and play" automated detection of the

Clamping and appropriate adaptation can take place.

It should also be noted that the line sections combined to form a line are also suitable for energy transmission and thus there is the possibility of placing consumers arranged in the clamping device, such as e.g.

Supply sensors with electrical energy. It can therefore be done directly in the clamping means a log, in the characteristic

Operating data such as operating hours, maximum speed, average speeds and ambient temperature are detected and passed to the machine tool after replacement of the clamping device. In the context of the invention it is preferred if the base flange

at least two radially adjustable to the spindle axis clamping jaws having a radially formed groove and provided for adjusting the clamping jaws drive ring when the removable flange has a collar with a radially projecting collar and if the coming to rest walls of the groove of the federal government to produce a Niederzugeffektes are inclined. This constructive

Design ensures a high on the Niederzugeffekt

Repeat accuracy with clearly defined axial alignment between the base flange and the removable flange, so that this precise relative position can be utilized in the design and selection of the coupling elements. It is therefore particularly possible that at least two adjacent coupling members are designed as a plug-socket connection. Alternatively, it is possible that at least two adjacent coupling elements are designed as inductive couplers, wherein in particular the high

Repeat accuracy with respect to the axial arrangement in the

Inductive coupler to be maintained maximum and minimum distance guaranteed.

Furthermore, it is possible within the scope of the invention that of at least two adjacent coupling links, the one is designed by a plurality of contact points and the other by corresponding resilient pins.

A further existing within the scope of the invention alternative is characterized in that of at least two adjacent coupling links, the one is designed by a board with at least one contact loop and the other by at least one resilient pin.

It should be noted that between adjacent components more than one pair of coupling members can be used, wherein it is not necessary that always identical pairs of coupling members are used. Thus, it is conceivable that both inductive coupler and plug-socket connections are used between two adjacent components. A change between the type of coupling link pairs is also possible along the line formed from line sections, so that at a Component different coupling member pairs may be present on one side and the other.

For a simple construction, it is advantageous if the contact points of all adjacent components in the transmission chain are arranged linearly and coaxially with the spindle axis, but alternatively between adjacent components also an offset of the line sections is conceivable, ie in a component from one contact point to the other

Contact point a transverse line inclined or perpendicular to the component axis.

To increase the reliability is further provided that the contact points are sealed by seals or O-rings relative to the environment.

The invention furthermore relates to an exchangeable flange for a quick-change clamping system in which a line section for data and / or running continuously from the top to the bottom runs

Energy transmission is provided, which has terminal coupling elements for contacting coupling elements of the line sections in the base flange and the clamping means.

In the following the invention is shown in the drawing

Embodiments explained in more detail; 1 shows a perspective view of the quick-change clamping device with a plurality

Alternating flanges arranged alternative workpiece clamping devices. Fig. 1 a is a perspective view of the clamping means as

Base flange with the clamping jaws in the open position,

Fig. 2 is a of Figure 1 a corresponding representation with a

Sectoral Freischneidung of the clamping body, Fig. 3 is a of Figure 1 a corresponding representation with the

Clamping jaws in the clamping position,

4 shows a representation corresponding to FIG 2 of the clamping means of Figure 3,

5 is an isolated, perspective view of the drive ring with the clamping jaws in the clamping position,

6 is a perspective view of the drive ring from below,

Fig. 7 is a perspective view of the drive ring with

Indicator curve and indicator pin in one rotational position,

Fig. 8 is a representation corresponding to Figure 7 in the other

Rotational position,

9 is a perspective view of the isolated jaws,

10 is a cross section through the clamping jaws, a perspective view of the Spannmittel- quick change system with separate flange from the base flange, with sectoral cutout, the

Showing drawing sections and coupling elements, one of the Fig. 1 1 corresponding representation in

12, a representation corresponding to FIG. 1 1 with inductive couplers as alternative coupling members, a representation corresponding to FIG. 12 with the alternative coupling members, the detail XVI from FIG. 15, one of FIG. 1 1 corresponding representation with further alternative coupling links, one of Figure 12 with the other coupling links

corresponding representation, the detail XVIIb of Fig. 17 the detail XVIIc of Fig. 17a 17d is a plan view of the plantain,

Fig. 18 is a Fig. 1 1 corresponding representation of the other

alternatives

FIG. 18 a shows a representation corresponding to FIG. 12

alternatives

18b shows the detail XVIIIb from FIG. 18a, FIG.

19 is a perspective view of the clamping means, by a

Replaceable flange,

FIG. 20 is a representation corresponding to FIG 1 a with a

Tensioning means associated Zugrohradapter,

Fig. 21 is a representation corresponding to Fig. 19 with sectoral

cutout,

Fig. 22 is an isolated view of the drive ring with the

Clamping jaws and the drawbar adapter with carrier ring and coupling part, shown in the rotational position open position,

Fig. 23 is a representation corresponding to Figure 22 with a

another coupling part,

23a, the detail XXIII a of Figure 23, FIG. 24 shows a representation corresponding to FIG. 23 in the other clamping position, FIG.

24a, the detail XXIV a of Figure 24,

Fig. 25 is an exploded view of the removable flange with the

Coupling sleeve; the removable flange shown in section,

Fig. 26 is a representation corresponding to Figure 21 with sectoral

cutout,

26a shows the detail XXVI a of FIG. 26,

FIG. 27 shows the detail XXVII of FIG. 36 with the rotational position of the draw tube adapter corresponding to the locking position, and FIG

27a shows the detail XXVIIa from FIG. 27.

In the figure 1, a quick-change tooling system 1 is shown that in the embodiment shown consists of a fixed to the work spindle 2 of a machine tool not shown itself clamping means 3 as a base flange 4 and a plurality of removable flanges 5, on which different workpiece clamping means 6 are attached , This

Clamping quick-change system 1 allows quick replacement with the work spindle 2 connected chuck 6, wherein connected in the individual components according to the invention by coupling members 47

Line sections 45, 46 are arranged, in particular the Machine control of the machine tool in the chuck 6

data correctly adapted to the new chuck 6.

In the following, the structure of the clamping device change system 1 with the integration of the power sections 45, 46 and the coupling links 47 will be explained.

Figure 1 a shows the clamping means 3, which is provided for attachment to the work spindle 2 of a machine tool and has a receptacle 7 for the work spindle 2 having clamping means body 8. Furthermore, the clamping means 3 has at least two clamping jaws 9, which can be adjusted radially to the body axis, and a drive ring 10, for the rotation of which in the circumferential direction a drive 11 is provided. In the embodiments illustrated in the drawing, a total of 6 are arranged distributed uniformly over the circumference

Clamping jaws 9 provided and the drive 1 1 is basically formed by a rotatable about a radial axis drive wheel 12.

As can be seen in particular from FIG. 5, a structure serving for the adjustment of the clamping ring 9 is formed on the outer circumference of the drive ring 10, namely a control cam 14 formed on the outer circumference with control cam 15 serving radially outwardly for adjustment of the clamping jaws 15. For the sake of completeness It should be noted that in a radially inwardly provided adjustment of the clamping jaws 9, the structure can also be realized on the inner circumference of the drive ring 10.

On the drive ring 10 is on the work spindle 2 side facing a drive toothing 16 is formed, into which the drive wheel 12 engages, wherein on the drive toothing 16 having side of Drive ring 10 is a return curve 17 is formed in the

Clamping jaws 9 with a control member 18 engages (Figure 6).

FIGS. 7 and 8 show an embodiment in which an indicator curve 19 is formed on the outer circumference of the drive ring 10

Cooperation with an indicator pin 20 for indicating the rotational position of the drive ring 20 of the indicator pin is preferably arranged body 8 in a radial bore of the clamping means, so that its position is visually recognizable from the outside; a review of the radial position of the

Indicator pin 20 is also possible by means of a sensor for acting on the control of the machine tool.

FIGS. 9 to 10 show that the clamping jaws 9 are L-shaped

Basic shape, on the base leg 21, the control member 18 is arranged. In the second leg 22, an open to the drive ring 10 pin receptacle 23 is formed, in which a contact pin 24 is inserted, which has a plane surface 25 on the drive ring 10 associated side. The investment pin 24 further has a pin base 26 which has a

Circlip 27 is secured in the pin holder 23. In particular, Figure 10 shows that the clamping jaws 9 radially outwardly have a groove 28, the walls 29 are formed inclined, so that the groove 28 narrows towards the groove bottom.

In the work spindle 2, the base flange 4, the removable flange 5 and the clamping means 6 are line sections 45, 46 for data and / or

Energy transmission arranged, wherein at adjacent components in the transmission chain coupling members 47 for connecting the

Line sections 45, 46 are provided to a line (Fig. 1 1). The coupling members 47 may be used in various alternatives as plug-in connectors. Socket connection 48 (Fig. 1 1) or designed as an inductive coupler 49 (Fig. 14). It is also conceivable that of at least two adjacent coupling links 47, the one by a plurality of contact points 50 and the other by corresponding resilient pins 51 (FIG. 18) is designed or that of at least two adjacent coupling links 47, the one through a board 52 with at least one contact loop 53 and the other by at least one resilient pin 51 (Fig. 17) is designed.

Preferably, the contact points 50 of all adjacent components in the transmission chain are arranged linearly and coaxially to the spindle axis and sealed by sealing disks or O-rings relative to the environment.

The jaws of the workpiece clamping means 6 are adjusted in the usual way by the machine tool associated with the draw tube, so that when using the clamping means 3 as Basisflansch 4 the clamping means 3 is assigned to the spindle at least a limited rotatable Zugrohradapter 30 whose rotation by means of at least one Coupling 31 is derivable from the rotation of the drive ring 10. This is on

Zugrohradapter 30 at least one axially extending adapter groove 32 is formed (Figure 21), in which a arranged on a support ring 33 sliding block 34 engages. The coupling member 31 is for rotating the

Carrier ring 33 is provided, wherein the embodiment shown in Figures 23 and 24 shows a drive pinion 35 as a coupling part 31, which engages in an outer toothing formed on the support ring 33 and an inner toothing formed on the drive ring 10. The embodiment shown in FIGS. 23 to 24 shows as

Coupling member 31 a mounted on an axle two-armed lever 37, the free lever ends are coupled to the drive ring 10 and the support ring 33. In this case, the carrier ring 33 associated free end engages of the two-armed lever 37 with a pin in a radially oriented groove, while the drive ring 10 associated end is forked and a fork cam 38 of the drive ring 10 engages over. On Zugrohradapter 30 locking cams 39 are formed in the circumferential direction with mutual spacing, while at a the change flange 5 associated coupling sleeve 40 counter cam 41 are formed, which are also spaced in the circumferential direction. In this case, the distance is dimensioned such that when taking place in the axial direction approach movement of the removable flange 5 with the coupling sleeve 40, the locking cam 39 of the

Base flange 4 can pass between the counter cam 41, so that there is an overlap of the locking cam 39 with the counter cam 40 during the rotation of Zugrohradapters 30. FIG. 25 shows that the interchangeable flange 5 has a collar 42, from which a collar 43 protrudes radially inward, the walls of the groove 28 or clamping jaws 9 and of the collar 43 coming to rest being inclined in order to produce a pull-down effect. In the following, the operation of the invention will be explained.

It is thus possible, as a replacement for a conventional chuck, to uniquely connect the clamping means body 8 with the work spindle 2 of the machine tool via the screws provided for this purpose. The tensioning means 3 thus connected to the work spindle 2 is already suitable for tensioning workpieces or tools, it also being possible to tension an exchangeable flange 5. To carry out the voltage, the drive wheel 12 is first actuated and the drive ring 10 is rotated so that the

Clamping jaws 9 are in the open position, so the control cam 15 is not with the flat surface 25 of the contact pin 24 of the jaws. 9 interacts. About the coupling member 31 is at the same time ensures that the support ring 33 via the nut 34, the Zugrohradapter 30 in the

Open position twisted. In this position, it is possible to mount the removable flange 5 with its coupling sleeve 40 axially on the base flange 4, wherein the counter cam 41 of the coupling sleeve 40 to the locking cam 39 of the

Zugrohradapters 30 are passed. If this constellation is reached, the drive wheel 12 is rotated, so that the drive ring 10 is rotated from the open position to the clamping position while the control cam 15, the clamping jaws 9 adjusted radially outward, so that this with its groove 28 on the collar 42 of the removable flange. 5 embrace trained covenant 43. In this radial adjustment of the clamping jaws 9 is due to the inclination of the walls of the groove 28 and the collar 43 a

Low-pull effect generated, which has a defined axial position of the

Change flange 5 relative to the base flange 4 causes. In this position, there is a secure contact of the coupling members 47 for connecting the

Line sections 45, 46 of adjacent components before.

It should be noted that during the tension of the removable flange 5, the rotation of the carrier ring 33 is already effected via the coupling part 31, so that the locking cams 39 arranged staggered axially relative to the counter cams 41 are rotated with the draw tube adapter 30 and thus result in an overlap of Counter cam 41 and locking cam 39 in the manner of a bayonet closure comes. Thus, the connection of the base flange 4 and the removable flange 5 completed and by the operation of the draw tube of the machine tool can on the

Zugrohradapter 30, an axial displacement of the coupling sleeve 40 are effected, for example, the jaws of a on the

Change the flange 5 mounted chuck 6. To release the connection from the removable flange 5 and the

Base flange 4, only the drive wheel 12 is rotated in the opposite direction, so that the drive ring 10 is rotated from the clamping position to the open position. This causes on the one hand, the rotation of Zugrohradapters 30, so that the locking cam 39 and the counter cam 41 no longer overlap simultaneously while the jaws 9 are adjusted by the voltage applied to the return curve 17 control member 18 radially inward, so that the groove 28 of Clamping jaw 9 out of engagement with the collar 43 of the removable flange 5 comes with the result that the

Removable flange 5 can be removed axially from the base flange 4.

Then it is possible to another change flange 5 with a

Chuck 6 other properties on the base flange 4 and thus to attach the machine tool, which takes place as a result of doing so

Contacting of the coupling members 47 can be detected individually by forming a closed line of the machine tool.

LIST OF REFERENCE NUMBERS

1 quick change system

2 work spindle

3 clamping devices

4 base flange

5 removable flange

6 Workpiece clamping devices

7 recording

8 clamping body

9 clamping jaws

10 drive ring

1 1 shoot

12 drive wheel

13 spindle drive

14 control curve

15 control cams

16 drive toothing

17 return curve

18 control member

19 indicator curve

20 indicator pen

21 base legs

22 second leg

23 pin recording

24 investment pen

25 plane surface

26 pin base

27 circlip

28 groove 29 walls

30 long tube adapters

31 coupling part

32 adapters

33 carrier ring

34 slot nut

35 drive part

36 strut

37 levers

38 fork cams

39 locking cams

40 coupling sleeve

41 counter cams

42 collar

43 fret

44 eccentric

45 line section

46 line section

47 coupling links

48 male-female connection

49 inductive couplers

50 contact point

51 pin

52 board

53 contact loop

Claims

Patent claims:

Machine tool with a work spindle (2), with a for

Attachment to the work spindle

(2) provided base flange (4) as part of a clamping device quick-change system (1), which also has a clamping device

(3) connectable interchangeable flange (5), characterized in that in the work spindle (2), the base flange (4), the interchangeable flange (5) and the clamping means (6) line sections (46, 45, 54, 55) for data - and/or energy transmission are arranged, and that on components adjacent in the transmission chain

Coupling members (47) are provided for connecting the line sections (45, 46) to form a line.

Machine tool according to claim 1, characterized in that the base flange (4) has at least two clamping jaws (9) which can be adjusted radially to the spindle axis with a radially formed groove (28) and a drive ring (10) provided for adjusting the clamping jaws (9). Interchangeable flange (5) has a collar (42) with a radially projecting collar (43), and that the walls of the groove (28) and the collar (43) that come into contact create a

Pull-down effect are inclined.

Machine tool according to claim 2, characterized in that at least two adjacent coupling members (47) are designed as a plug-socket connection (48).

4. Machine tool according to one of claims 1 to 3, characterized in that at least two adjacent coupling members (47) are designed as inductive couplers (49).

5. Machine tool according to one of claims 1 to 4, characterized

characterized in that of at least two adjacent coupling members (47), one is designed by a plurality of contact points (50) and the other by corresponding resilient pins (51).

6. Machine tool according to one of claims 1 to 4, characterized

characterized in that of at least two adjacent coupling elements (50), one is designed by a circuit board with at least one contact loop (53) and the other by at least one resilient pin (51).

7. Machine tool according to one of claims 1 to 6, characterized

characterized in that the contact points (50) of all adjacent components in the transmission chain are arranged linearly and coaxially to the spindle axis.

8. Machine tool according to one of claims 1 to 7, characterized

characterized in that the contact points (50) are sealed from the environment by sealing disks or O-rings.

9. Interchangeable flange for a quick-change clamping system, thereby

characterized in that a line section (45) for data and/or data transmission runs continuously from the top to the bottom

Energy transmission is provided, which has coupling members (47) at the ends for contacting coupling members (47) of the line sections (46) in the base flange (4) and in the clamping means (6).