DE1230288B - Bezel - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. CL:

Number:
File number:
Registration date:
Display day:

B23b

German class: 49 a - 32

1230288
W 276701 b / 49 a
April 16, 1960
December 8, 1966

The invention relates to a bezel for storing workpieces in need of support, in particular on lathes and solves the task of using the well-known steady rests for intercepting beating turned parts in to make particularly suitable. This task results z. B. when machining crankshafts, long threaded spindles od. Like. In which it is important to these parts only from to relieve their own weight and therefore intercept them from below. Such workpieces often have ίο fig a form that differs relatively strongly from the intended one, as this is the result of tensions and in the case of crankshafts assembled from individual parts result from dimensional deviations of the individual parts.

If you support these workpieces in the previously known manner during the first machining on the The lathe rigidly, the subsequent machining shows all the greater dimensional deviations, which require multiple revisions.

The invention is therefore based on the knowledge 'that it is necessary to shorten working hours Finishing is useful to ensure that the workpiece is only from relieved of its own weight, d. H. is therefore only supported from below, but in the rest Directions are given as much freedom of movement as possible.

Accordingly, the invention proceeds from a bezel for supporting striking turned parts close to them Processing point from the one on the bed between the tailstock and faceplate od. The like. Out Slide, an adjustable bezel lower part and a bezel upper part movably mounted opposite it consists. Here is to solve the above task and to eliminate the previous disadvantages proposed according to the invention, the bezel upper part against the lower part to be stored freely movable horizontally and perpendicular to the workpiece axis.

However, it is already known to carry out such a 'orizontal and perpendicular to the workpiece axis freely movable mounting of the Lünettenoberteiles relative to the lower part, but this arrangement is used to solve another object, and shows other effects. The well-known steady rest should also absorb the weight of the workpiece, but it is arranged at the free end of the workpiece protruding far from the lathe end to prevent it from sagging too freely and thereby bending on the one hand and beating through the rotary movement on the other and represents a risk of accident. The horizontal and bezel

Applicant:

H. A. Waldrich G. m. B. H., Siegen (Westphalia)

Named as inventor:

Cornell's Marius van der Linden,

Rijsoord (Netherlands)

An arrangement that is movably mounted perpendicular to the workpiece axis has the further purpose of a to avoid precise setting of this end in the spindle axis of the lathe and in this respect the end of the workpiece to be left to its self-centering.

The proposed according to the invention displacement of such a bezel from the free end of a long workpiece directly to the processing point is a risk to the extent that it was previously appeared necessary, especially at the processing point, for precise centering and a rigid one Storage of the workpiece must be taken care of. By departing from this view and applying However, the teaching of the invention achieves the opposite of what would initially have been expected must be: An exact, impact-free processing is carried out by the inventive, movable Storage of the upper part of the steady rest in a shorter time and with less effort.

The upper part of the steady rest can be connected to the lower part of the steady rest in various ways. So is it is possible in a particularly simple implementation of the invention, the upper part around a below the workpiece axis and to pivot the bearing axis lying between the lower part and the upper part. Here leaves the radius of the swing circle against the practically occurring flapping movements of the Design the workpiece so large that the workpiece movement actually performed is essentially in horizontal direction and more to the workpiece axis takes place, as the invention prescribes. One can but also - albeit with a little more effort - make the arrangement so that the bezel top is movably mounted on a slide or roller track, which is arranged between the lower part and the upper part is. Here, in turn, the upper part of the bezel can be used as a bearing half-shell with a horizontal, Form a flat lower surface and also insert a roller bearing between the half-shell and the lower part, z. B. a flat cylindrical roller cage, wherein

609 730/143

a height adjustment of the half-shell can be provided by a double wedge device. Finally, it is advisable to include the upper part of the steady rest to secure against axial movement to engage a groove in a tongue on the lower part of the steady rest. For machining workpieces, at which it is not necessary to provide the mobility, in which the reverse is more appropriate with fixed Bezel top is to be worked, it is not necessary to use the bezel according to the invention replace with a usual, if you the upper part against the lower part z. B. by Screws.

Exemplary embodiments of the subject matter of the invention are shown in the drawing. Here shows

Fig. 1 is a view in the axial direction of the workpiece against a bezel with a swiveling upper part,

A b b. 2 the same bezel in front view,

Fig. 3 is a view according to Fig. 1 of a bezel with horizontally movable upper part.

The steady rest according to the A b b. 1 and 2 consists of a carriage 5 with guides 6, 7, 8 provided on its lower surface for guiding on the lathe bed, not shown, and with an upper dovetail guide 9 on which the lower part of the steady rest 10 can be displaced horizontally and transversely to the workpiece axis 12 via a spindle 11 and can be fixed using screws 13. The lunette upper part 14 has three support bolts, namely a lower 15, which lies vertically below the workpiece axis 12 and acts upwards and serves to hold the weight, another rear support bolt 16, which acts horizontally at the height of the workpiece axis 12 from the rear to the front, and a front support bolt 17 which rests against the workpiece from below at an angle of 30 ° with respect to the horizontal through the workpiece axis 12. All bolts can be adjusted by means of spindles 18 and can be fixed using clamping devices 19.

According to this known arrangement of the support bolts on steady rests, the upper part of the steady rest has 14 essentially symmetrical V-shape. It is via a pivot pin 20 on his Vertex mounted opposite the correspondingly designed lower part 10 of the steady rest, so that the Workpiece 21 can perform circular movements in accordance with the arrow 22. However, since the impact of such impacting workpieces is only very small, is practically an essentially horizontal movement of the workpiece axis 12 before, so that the angle of the tool, not shown can not be changed significantly compared to the workpiece circumference. To prevent axial movements are at 23 and 24 grooves 25 and corresponding tongues 26 on the lower and upper part of the steady rest provided, so that the upper part of the steady rest intended for heavy lathes only can be inserted into the lower part under the effect of its own weight.

The front support bolt 17 is arranged in a special support part 27, which has a Hook strip 28 can be hooked into a corresponding hook groove 29, which is close to the lower Support bolt 15 is located. In front of the hook groove 29 there is a vertically extending one on the lower part of the steady rest Stop surface 30 is provided, which corresponds to a similar surface on the support part 27, on its lower end screws 31 are provided for attaching the support part to the bezel upper part.

After the execution according to A b b. 3, in which the same parts are provided with the same reference numerals are, the workpiece 21 is to be stored in a lunette upper part designed as a half-shell 32. this has a horizontal, flat lower surface 33 and can be adjusted in height via wedges 34, 35, the wedge 35 lying below being longitudinally displaceable via a spindle 36. Between the upper wedge 34 and the lower surface 33 of the half-shell 32, a cylinder roller cage 36 is inserted, which the movements facilitated in the direction of double arrow 37 between the two parts. The lower part of the steady rest 38 surrounds at a distance the half-shell 32 is U-shaped at the front and rear, with the rear U-leg 39 attached to the Bezel lower part 38 is cast, while the front U-leg 40 has a joint 41 with removable Bolt 42 is combined with the lower part 38 of the steady rest. The front leg 40 can therefore removed and the workpiece inserted horizontally into the steady rest with the half-shell 32 will. To fix the upper part of the bezel, namely the half-shell 32, are used in the legs of the lower part 39, 40 and clamping screws 43 which pass through their upper ends horizontally.

Even with the execution according to A b b. 1 and 2 can be known means for setting the movable Provide steady rest, z. B. by appropriately enlarged training of the tongue and groove parts 25, 26 at 23 and 24 and od by driving in wedges. The like. On these parts.

Claims (8)

Patent claims: 1. Bezel to support striking turned parts near their processing point with a the bed between the tailstock and faceplate od. The like. Guided slide, an adjustable Bezel lower part and a bezel upper part movably mounted opposite it, thereby characterized in that the lunette upper part (14, 32) against the lower part (10, 38) in on is mounted in a known manner freely movable horizontally. 2. Bezel according to claim 1, characterized in that the bezel upper part (14) around a bearing axis located below the workpiece axis (12) and between the lower part (10) and upper part (14) (20) is pivotably mounted. 3. Bezel according to claim 1 or 2, characterized in that the bezel upper part (32) on a slide or roller track (36) between the lower part (38) and the upper part (32) in a horizontal position Direction is movably mounted. 4. steady rest according to claim 3, characterized in that the lunette upper part as a bearing half-shell (32) with a horizontal flat lower surface (33) is formed. 5. Bezel according to claim 4, characterized by one between the half-shell (32) and the lower part (38) inserted roller bearing, in particular a flat cylindrical roller cage (36). 6. steady rest according to claim 4 or 5, characterized by a double wedge device (34, 35) with spindle adjustment (36) for height adjustment of the half-shell (32). 7. Bezel according to one of claims 1 to 6, characterized in that to secure against axial movement of the upper part of the steady rest (14) with a groove (25) in a tongue (26) on the lower part of the steady rest (10) intervenes. 8. Bezel according to one of claims 1 to 7, characterized in that the bezel upper part (32) can be fixed relative to the lower part (38) by screws (43). Documents considered: German Patent No. 305443;
German utility model No. 1716163. 1 sheet of drawings 609 730/143 11.66 © Bundesdruckerei Berlin