Machine Tool For The Machining Of A Workpiece By Means Of A Tool

Abstract

The invention relates to a machine tool for the machining of a workpiece by means of a tool, wherein the machine tool is designed to clamp the tool for the machine-controlled machining within a machining program on the work spindle and to clamp the tool on the machine bench of the machine tool, characterized by a tool magazine which can be secured on the machine bench, on which a tool or a plurality of tools may be clamped individually in a replaceable manner.

Claims

1. Machine tool for the machining of a workpiece by means of a tool, wherein the machine tool is designed to clamp the workpiece for the machine-controlled machining within a machining program on the work spindle and to clamp the tool on the machine bench of the machine tool, characterized by a tool magazine which can be secured on the machine bench, on or at which a tool or a plurality of tools may be clamped individually in a replaceable manner.

2. Machine tool according to patent claim 1, characterized in that the tool magazine is designed so that different tools can be clamped in different directions on the tool magazine.

3. Machine tool according to patent claim 2, characterized in that the tool magazine has a substantially rectangular or cuboidal base body, on whose outer surfaces clamping means are provided for the clamping of the tool or tools.

4. Machine tool according to patent claim 1, characterized in that the tool magazine comprises at least one driving means by which individual or multiple tools can be driven independently of the movement of the machine bench.

5. Machine tool according to patent claim 1, characterized in that the tool magazine comprises a clampable pallet.

6. Machine tool according to patent claim 5, characterized in that the machine tool moreover comprises a pallet changer and a pallet magazine, especially a round or linear magazine, so that the pallet changer in combination with the round or linear magazine can bring about an automated interchanging of a plurality of tools which are clamped on the pallet.

7. Machine tool according to patent claim 1, characterized in that the machine bench is a swivel rotary table.

8. Machine tool according to patent claim 1, characterized in that the machine tool moreover comprises a wheel magazine, which is designed to store a plurality of workpieces and a changing mechanism by means of which the workpieces can be swapped in and out from the wheel magazine to the work spindle.

9. Machine tool according to patent claim 8, characterized in that the wheel magazine is moreover designed to hold tools and the changing mechanism is moreover configured to swap tools in and out from the wheel magazine to the work spindle.

10. Machine tool according to patent claim 1, characterized in that the machine tool is designed to fasten the workpiece to the work spindle by a tool interface, especially a HSK interface.

11. Method for machining a workpiece on a machine tool with the steps: Providing of a plurality of workpieces in a magazine, Swapping of one of the workpieces in the work spindle of the machine tool, Providing of a tool magazine with a tool or a plurality of tools, mounted on a machine bench of the machine tool And machining of the workpiece clamped in the work spindle with one tool or a succession of several tools kept in the tool magazine.

12. Method for machining a workpiece on a machine tool according to patent claim 11, characterized in that, for the replacing of the tools, the tool magazine with the tools stored therein is replaced by means of a pallet changer for another tool magazine with tools stored therein.

13. Method for machining a workpiece on a machine tool according to patent claim 11, characterized in that tools are also stored in the magazine besides the workpieces and a handling device is used to swap in workpieces and tools in the work spindle in alternating succession and workpieces are also stored in the tool magazine besides tools and the method involves the step of machining a workpiece clamped in the tool magazine by a tool provided in the work spindle.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Further details of the present invention will be described below with the aid of specific exemplary embodiments making reference to the figures, where

[0029] FIG. 1a shows a first exemplary embodiment of a machine tool according to the invention with tool magazine according to the invention and wheel magazine in spatial representation,

[0030] FIG. 1b illustrates an enlarged feature of FIG. 1a, showing a workpiece fastened to the work spindle and a turning tool fastened to the tool magazine,

[0031] FIG. 1c shows a side view of a feature of the machine tool according to the invention as shown in FIG. 1a,

[0032] FIG. 2a shows another configuration of a machine tool according to the invention, in which a workpiece secured to the work spindle is subjected to a drilling in the vertical direction,

[0033] FIG. 2b shows another configuration of a machine tool according to the invention, in which a workpiece secured to the work spindle is subjected to a turning in the horizontal direction,

[0034] FIG. 2c shows another configuration of a machine tool according to the invention, in which a workpiece secured to the work spindle is subjected to a drilling in the horizontal direction,

[0035] FIG. 3a shows an exemplary embodiment of a machine tool according to the invention wherein a tool magazine according to the invention is arranged on a pallet which is carried by a NC circular table,

[0036] FIG. 3b shows another exemplary embodiment of a machine tool according to the invention wherein the machine bench is designed as a swivel rotary table, the swivel rotary table being shown in a recumbent position A=0,

[0037] FIG. 3c shows another exemplary embodiment of a machine tool according to the invention wherein the machine bench is designed as a swivel rotary table, the swivel rotary table being shown in a recumbent position A=90,

[0038] FIG. 4a shows another exemplary embodiment of the machine tool according to the invention wherein the tool magazine is mounted on a pallet and a pallet changer is provided for it,

[0039] FIG. 4b shows a round magazine for holding a plurality of pallets for swapping in a machine tool according to the invention, and

[0040] FIG. 5 shows a flow chart of an exemplary embodiment of a method according to the invention for the machining of a workpiece on a machine tool.

DETAILED DESCRIPTION

[0041] FIG. 1a shows the exemplary embodiment of a machine tool according to the invention in perspective representation. The machine tool 1 comprises a machine bed 2, on which a machine bench 4 is mounted in guideways 3. The machine frame of the machine tool 1 according to the invention furthermore comprises a vertical pillar 5, on which guides 6 are arranged, by which a work spindle 7 can be moved in the vertical direction. The work spindle 7 comprises a spindle head 8, in which a HSK interface 9 (see FIG. 1b) is supported, by means of which a workpiece 10 is clamped in the work spindle 7.

[0042] On the machine bench 4 there is arranged a pallet 11 with a tool magazine 12, being mounted firm against rotation on the pallet 11. The tool magazine 12 has a rectangular base body 13, on whose sides, or surfaces 13a, 13b and 13c (FIG. 1a), are provided clamping means 14a, 14b, 14c, 14d, 14e and 14f, in which tools 15a are clamped in various directions.

[0043] The tools 15b and 15d here are turning tools, while the tools 15a, 15c, 15e and 15f are designed as drilling tools. However, the invention is not limited to this and milling tools or grinding tools could also be held in the tool magazine 2.

[0044] The machine tool 1 according to the invention furthermore comprises a wheel magazine 17 with two cascaded wheels 17a and 17b, which provide along their circumference a plurality of workpieces 10 in corresponding workpiece stations 19. A handling device in the form of a changer 22 is provided in order to swap out the individual workpieces 10 from the workpiece stations 19 of the wheel magazine 17 and replace them in the spindle head 8.

[0045] FIGS. 2a to 2c illustrate various machining processes of the workpiece 10 clamped in the spindle head 8 by means of the HSK interface 9. The representations show that different kinds of machining can be done for the tool magazine 12 according to the invention with the tools 15a to 15e oriented in different directions. Thus, for example, FIG. 2a illustrates a drilling of the workpiece in the vertical direction and FIG. 2b a turning of the workpiece with a horizontally clamped tool in the horizontal direction, and FIG. 2c a drilling of the workpiece 10 by means of the tool 15.

[0046] FIG. 3a shows an example in which a tool magazine 13 according to the invention is arranged on a NC circular table 25. By contrast with this, FIGS. 3b and 3c show a configuration of the machine tool according to the invention in which the tool magazine 13 according to the invention is arranged on a swivel rotary table 30, FIG. 3b showing the swivel rotary table in an angle position of 0, i.e., parallel to the machine bed, while in the representation of FIG. 3c it is tilted by 90. The representations in FIGS. 3a, b and c show that a machining of the workpiece 10 or 11 clamped in the work spindle 7 is possible by means of different tools 15d (in FIG. 3b) or 15b (in FIG. 1c) with the same relative positioning of the work spindle 7 simply by a 90 swiveling of the swivel rotary table 30.

[0047] FIG. 4a shows an exemplary embodiment of a machine tool according to the invention in which a pallet changer 31 is provided, by which a change pallet 32 can be swapped. On the change pallet 32 there is provided a clamping means 33 by which either a further tool magazine can be mounted (similar to the tool magazine 13 shown in the representation) or a further corresponding tool can be mounted by a corresponding clamping means such as a tool interface (not shown) for the direct clamping of a tool on this pallet 32. With the round magazine 40 shown in FIG. 4b it is possible to swap other pallets 41 in short succession into the machine tool according to the invention so as to accomplish an automated feeding of pallets preloaded with tools (not shown) via the pallet changer 32.

[0048] Of course, the invention is not reduced to pallets as interchangeable tool carriers, and traditional tool carriers may be used just as well, having clamping means for securing a tool magazine according to the invention on them.

[0049] FIG. 5 shows an exemplary embodiment of a method according to the invention with the steps S1 of providing a plurality of workpieces in a magazine and swapping one of the workpieces into the work spindle of the machine tool in step S2. In step S3 there is the providing of a tool magazine with a plurality of tools, mounted on a machine bench of the machine tool, and in step S4 there occurs the machining of the tool clamped in the work spindle with one of the tools stored in the tool magazine.

[0050] The above description of the invention in its general form and with the aid of the exemplary embodiments clearly shows how the concept of five-axis machining of workpieces on the machine tool is significantly broadened by the invention, as regards the possibilities of the positioning of tool and workpiece with reduced traversing at the same time. This is accomplished by the combination of the so-called reverse clamping of workpiece in work spindle and tool on the machine bench with the tool magazine according to the invention, which consequently uses the available space in the area of the machine bench to make possible the design prerequisites for a providing of different tools in different orientation. With the addition of the further options according to the invention of including a pallet changer with tool magazine clamped on the pallet or a wheel magazine, the possibility of machining in time-efficient manner with shortened feed paths is further increased, so that a substantial reduction in the machining time can be realized in industrial fabrication on the machine tool according to the invention.