Gear cutting – milling – or planing – Milling – Machine frame
Patent
1998-09-04
2000-09-05
Briggs, William
Gear cutting, milling, or planing
Milling
Machine frame
29DIG101, 82149, 408234, B23Q 101, B23B 1700
Patent
active
061133248
DESCRIPTION:
BRIEF SUMMARY
The invention relates to an apparatus for the machining of workpieces in accordance with the preamble of claim 1.
An apparatus is described in EP-A-O 652 075 which has a frame, a working table and a tool support which is formed as a portal. The portal in the working table comprises a non-metal. The portal is mounted on the working table.
The invention, as characterised in the claims, is based on the object of improving the named apparatus.
Through the use of the plate as a connection element between the lower part and the working table and also the tool support, a design concept is obtained which enables the manufacture of the apparatus in the form of modular series. Associated with this is a simple construction and a cost-favourable manufacture. Furthermore, so-called low-cost apparatuses and high-tech apparatuses can be realised with this concept. With the design of the lower part, the plate, the working table and the machine tool of non-metal, in particular of natural stone, the influence of thermal expansion and of the oscillations during the machining of a workpiece are largely overcome.
In the following the invention will be explained with respect to the accompanying drawing.
There are shown:
FIG. 1 a side view of a first embodiment of an apparatus in accordance with the invention;
FIG. 2 a plan view of an embodiment of a lower part;
FIG. 3 a section of an embodiment of a lower part;
FIG. 4 a view of a first embodiment of a bearing arrangement for the tool support;
FIG. 5 a side view of a second embodiment of an apparatus in accordance with the invention; and
FIG. 6 a view of a second embodiment of a bearing arrangement for the tool support.
Reference is made to the FIGS. 1 to 4. In the apparatus under discussion here, a plate 1 is arranged between a lower part 2 and also a working table 3 and a tool support 4. The plate 1, the lower part 2, the working table 3 and the tool support 4 consist of natural stone, in particular of granite. A carriage 5 is arranged on the tool suppport 4, the Z-axis is displaceable and provided with a machining device 6 which is displaceable in the Y-axis.
The lower part 2 comprises a base plate 15 and a plurality of wall parts 16 which are fixedly connected to the base plate, for example adhesively bonded thereto. The geometrical arrangement of the wall parts is, on the one hand, determined by the space requirement of control and service devices and, on the other hand, by the requirement for a rigid construction, i.e. the lower part 2 connected to the plate 1 behaves essentially as a granite block (FIG. 2).
The plate 1 is mounted on the lower part 2. For this purpose, use is made of a threaded sleeve 18 which is anchored in the part consisting of granite and of a screw 19 which is screwed into the threaded sleeve (FIG. 3).
The working table 3 is installed at a fixed location on the plate, and indeed screwed or adhesively bonded. The tool support 4 is formed as a freestanding column. The column is provided with a bearing arrangement 21 and is in engagement with a feed device 22, in order to displace the tool support 4 in the X-axis. The bearing arrangement is a gas bearing which includes three bearing elements 23, 24, 25, which are secured to the column. In the plate 1 there is formed a recess 26 in which the gas bearing is displaceably arranged. The gas bearing is held by means of holding members 27 in the recess 26 in such a way that the tool support is arranged for compulsory guidance on the plate 1. The feed device 22 is arranged in a fixed location in the recess 26. The feed device is a spindle drive (FIG. 4).
FIG. 5 shows a second embodiment of the apparatus which is a further development of the concept of the invention. The apparatus includes the plate 1, the lower part 2, the working table 3, the tool support 4 and an upper part 31. The upper part 31 extends over the length, or over a part of the length of the plate 1 and has a plate-like extension arm 32. The upper part 31 is screwed or adhesively bonded to the plate. A recess 33 which is made the same as or simil
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Briggs William
Huber Engineering AG
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