DE8135511U1 - Collet-like guide structure for lathes for guiding post material - Google Patents

Description

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Applicant:

Hans Jens, Sylter Bogen 21, 2300 Kiel 1

Collet-like guide structure
for lathes for guiding
Bar stock

The innovation relates to a collet chuck-like, co-rotating guide structure for lathes for guiding bar material during its machining, consisting of several, circularly arranged, axially extending and completely separated guide segments, which are held at a distance from one another by means of elastic elements
are, the structure on the outer circumference of its two end regions each having a tapering truncated cone surface for the radial compression of the segments.

A guide structure of the type mentioned above is known with which it is possible to incorporate bar material to be machined in lathes, preferably round material, essentially independently of its surface quality
and to work on the same leadership structure in an exciting way.
This is due to the parallel installation of the individual guide segments over their entire length on the one to be machined
Due to rod material, being due to their

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elastic mounting in a receiving sleeve the possibly round | _{inaccuracies, such as are given / can} yield in rolled material according to DIN 1013. It has been shown in practice that the assembly of the guide segments would have to be simpler and their radial adjustability more sensitive and that a larger setting range of the structure would have to be

would be part of it.

The task of the innovation is thus to improve the guide structure mentioned in the introduction to the effect that it is more precisely adjustable and easier to assemble and

has a larger setting range.

The solution to this problem is that the apex angle of the two truncated cone surfaces is 30 ° to 60 °, that each conical dab area of the structure is attached to its to the column between the guide segments adjoining partial surface areas in the axial direction smaller in diameter is than in the rest of the conical surface area and that the inner surfaces of the guide segments delimiting the gaps are recessed for receiving the elastic elements are.

With this solution, the leadership structure can be more sensitive and can be adjusted more easily radially, so that depending

I of the bar material to be processed in each case the exact I correct radial position of the guide segments for machining yes can be set precisely. Furthermore, larger round {

running inaccuracies of the material to be processed during the machining of which can be compensated without this having a negative effect on the surface quality of the workpiece, since the guide segments can yield radially to a greater extent. The establishment of contact can also be faster and cheaper to assemble because the elastic elements that keep the guide segments at a distance from one another are not to be assembled by a relatively complex vulcanization process.

A preferred further development consists in the partial surface areas the cone truncated surfaces consist of flat surfaces. This is very easy to do.

The innovation is explained in more detail below with the aid of an exemplary embodiment shown in the accompanying drawing j explained. Show it:

Figure 1 is a partially sectioned side view according to

\ of the line I - I in Figure 2,

Figure 2 is an end view,

FIG. 3 shows a partial view according to arrow A in FIG. 1, FIG. 4 shows a bearing structure in axial section for the guide structure according to FIG. 1.

As can best be seen from Figures 1 and 2,

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the collet-like guide structure consists of several, circularly arranged, axially extending and complete separate guide segments 1, 2 and 3, which are arranged around a central and common axis of rotation 4 are. In their area facing the axis of rotation, the segments form a material passage 5 through which

to

the bar material 6 to be processed extends. In the illustrated In this case, the passage 5 is circular in cross section in order to be able to accommodate round material. Alternatively, however, it is also possible that the passage can have a different cross-sectional profile, namely for the case when e.g. a bar material with a hexagonal cross-section is to be machined.

The management structure comprising management segments 1, 2 and 3 has a conical dab surface 7 and 8 at each of its ends, which abut against corresponding mating conical surfaces come when the guide segments are to be adjusted in the radial direction, as will be clear. The truncated cone surfaces 7 and 8 taper towards the end of the build. the

The tapering is carried out in such a way that the apex angle o * - of each truncated cone surface is in a range from 30 to 60. This results in a very fine radial adjustment of the guide segments.

The guide segments 1, 2 and 3 are held at a distance from one another by elastic elements, for example made of rubber, such as

is still explained, whereby gap 9 is formed between the individual guide segments. The partial areas each truncated cone surface 7/8, which is attached to the column 9 between the Adjacent guide segments are formed by removing material along the entire axial length of the truncated cone surfaces, so that each truncated cone surface in this area is designed to be smaller in diameter than in the rest of the area. In a simple manner, the mentioned partial surface areas 1o by flat surfaces educated. Through this design of the conical truncated surfaces there is the possibility that the radial adjustment range of one and the same guide structure is relatively large and allows an adjustment range of about 0.5mm to 2.0mm.

In a further embodiment of the guide structure, the inner surfaces 11 delimiting the gaps 9 are the guide segments 1, 2 and 3 cut out in order to give the elastic elements 13 already mentioned a good hold, as shown in FIG 3 can be clearly seen. From Figure 1 it can be seen that each inner surface 11 is two axially spaced apart Has recesses 3 4 which are formed by a bore extending radially from the outside to the axis of rotation 4 of the structure are, through this hole on the one hand material from the one guide segment and on the other hand material from the other Guide segment is recessed, as FIG. 3 shows. As a result, the cutouts of one guide segment are located exactly opposite the recesses of the other guide segment, so that these recesses can each receive an elastic element together.

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Alternatively, however, other configurations of the recesses mentioned are also possible, which is readily apparent to the person skilled in the art is clear and therefore does not need to be explained further.

On its cylindrical outer surface, for example in the area of its axial center, the guide structure is marked with | a circumferential groove 15, which all three guide segments | 1, 2 and 3 recorded. In this circumferential groove 15 is a elastic ring element 16, which can for example consist of rubber, and holds the three guide segments together. Through this it is possible that the elastic elements 13, which keep the guide segments at a distance, loosely in the recesses 14 can be inserted. Overall, this results in a simple assembly of the guide structure.

The guide structure itself is held in a circumferential bushing 17 according to FIG. 4, which in turn is secured by means of two roller bearings 18 and 19 is rotatably mounted in a housing 2o. The housing 2o is stationary on the lathe 21 in the usual way attached. According to a further preferred feature, the roller bearings 19.2o consist of high-precision tapered roller bearings to one to bring about exact concentricity of the guide structure.

The radial adjustment of the guide structure is known per se, and for this purpose a clamping cone part 22 is used which, with its Clamping cone 23 against a cone truncated surface 8 of the guide structure comes to rest, while the other truncated cone surface 7 of the guide structure against an axially stationary counter-conical surface the circumferential bush 17 rests, as shown in FIG.

On the other hand, the cone clamping part 22 lies against an axial one Rolling bearing 24, which can also consist of a tapered roller bearing. A sentence presses against the axial roller bearing Disk springs 25, .. on which an adjusting sleeve 26 engages, which in turn engages with the fixed housing 2o via a threaded connection.

Claims (6)

1. Collet chuck-like, co-rotating guide structure for lathes for guiding bar material during its machining, consisting of several, circularly arranged, axially extending and completely separate guide segments, which are kept at a distance from one another by means of elastic elements,
the structure on the outer circumference of its two end regions each having a tapering conical truncated surface for the radial compression of the segments, characterized in that the apex angle (^ f) of the two
Truncated cone surfaces (7,8) 3o ° to 60 ° is that each
Cone truncated surface of the structure in their to the column
(9) between the guide segments (1, 2, 3) adjoining partial surface areas (1o) is designed to be smaller in diameter in the axial direction than in the rest of the conical surface area and that the areas delimiting the gaps
Inner surfaces (11) of the guide segments (1,2,3) are recessed. 2. Guide structure according to claim 1, characterized in that the partial surface areas (1o) of the truncated cone surfaces * * · ■ ml • · S ■ ■ S ■ I •> 1 I. (7,8) consist of flat surfaces. 3. Guide structure according to claim 1 or 2 _5, characterized in that said inner surfaces (11) of the guide segments are each provided with two axially spaced recesses (14), the recesses of one segment opposite the recesses of the other segment. 4. Guide structure according to claim 3, characterized in that two opposite each other lying recesses (14) through a common, radially of outside to the axis of rotation (4) of the structure extending bore are formed. 5. Guide structure according to claims 1, 2, 3 or 4, characterized in that that it is provided on its cylindrical outer surface with a central circumferential groove (15) in which a elastic ring element (16) is located. 6. Guide structure according to claim 1, 2, 3, 4 or 5, wherein this is held in a circumferential bush, which by means of roller bearings is rotatably mounted in a housing, characterized in that the roller bearings (18, 19) consist of tapered roller bearings.