DE8416577U1 - Tailstock for a grinding machine - Google Patents

Description

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Stw.ι SCHAUDT-tailstock-swiveling quill-I Schaudt File 23 - Stuttgart, May 23, 1984 ■ *; Tailstock for a grinding machine

The invention relates to a tailstock for a grinding machine, in particular a multi-purpose grinding machine with a with several grinding tools that can be optionally moved into a work area.

With so-called universal grinding machines, it is common to carry out different grinding work optionally with different grinding tools. This is how it is, for example common in cylindrical grinding machines of the type described above, various grinding wheels for external, internal and surface grinding on a common grinding headstock pivoting the respective grinding wheel into the work area to be provided. In order to avoid mutual hindrances between newly swiveled in and still in the work area To avoid standing machine elements, the latter must be removed by z. B. after the external grinding of a workpiece held between centers during a subsequent internal grinding process on a one-sided clamped r Workpiece the tailstock, which is no longer required, is either dismantled in a cumbersome manner or in a laborious manner:

designed, extra-long table guide from the work area | is moved backwards. \

f The invention is based on the object of creating a device J with the aid of which the above-mentioned conversion work | can be accomplished and automated with less structural effort and time. I.

This object is achieved according to the invention in that the I. Tailstock is formed from two parts movable relative to one another, of which the one forming the quill bearing Part can be moved out of the work area.

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Stw.s SCHAUDT-tailstock-swiveling quill-I Schaudt File 23 - Stuttgart, May 23, 1984

In the context of the invention, the sleeve bearing can for example can be moved transversely to the table guide or to the quill axis by means of a slide guide. A particularly space-saving one as well as drives and controls that are easy to control The embodiment, however, consists in the fact that the quill mounting by means of a Schwa-fcantriebes to a transverse to Quill axis extending pivot axis from the work area is herauaechwenkbar.

Defined locking positions of the sleeve bearing inside and outside the work area are according to another Proposal ensures that the sleeve bearing by means of a graduated disk and an index bolt in the respective swivel pitch can be locked. According to a further feature, the sleeve bearing has three at an angle of 120 ° to each other or pivotable in the plane of rotation on surfaces, two of which Form receiving areas and one serves as an open area. With this configuration, the open space guarantees accessibility of the work area through the inner loop direction, while an additional recording area, for example For mounting an additional tailstock unit for other grinding tasks or for a different center point equipment serves.

It is also useful if the swivel drive has a swivel shaft which is provided with a pinion, in which a rack operated by two actuating cylinders engages, with the purpose of compensating for any backlash the rack also engages a biasing element.

According to a further proposal, the index bolt also has an actuating cylinder drive, with an additional Safety device engages a prestressing element on the index bolt.

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Stw .: SCHAUDT-tailstock-swiveling quill-I Schaudt File 23 - Stuttgart, May 23, 1984

The advantage achieved by the invention is that dufdh Remaining of the non-disturbing tailstock lower part in the Work area not remove the table guide before converting Grinding chips, coolant and the like impurities must be freed, with the removal of the sleeve bearing the forming tailstock part, which can be easily encapsulated in the table level, can be fully automated from the work area, so that overall machine idle times for a shorter machine (Changeover times) can be reduced considerably.

1 hour: SCHAUDT tailstock swiveling quill I Schaudt File 23 - Stuttgart, May 23, 1984

5 The invention is explained in more detail below with reference to an exemplary embodiment shown in the drawing.

Here show:

10 Figure 1 is a partial plan view of a schematized Universa! -Cylindrical grinding machine,

Figure 2

a front view of the schematically provided tailstock in the direction of arrow II of the machine according to Figure 1,

Figure 3 structural details of the tailstock in Section along the line III-III according to Figure 2,

20 Figure 4 shows a section through the tailstock along the line IV-IV according to Figure 3 and

Figure 5

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a section through the tailstock along the line V-V according to Figure 3.

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Stm .; SCHAUDT tailstock swiveling quill I Schaudt File 23 - Stuttgart, May 23, 1984

In the cylindrical grinding machine shown in FIG

on a machine bed 1, a table 2 is guided displaceably in one direction. On table 2 there is again a Merkstück 4 slidably guided. A tailstock 6 that can be moved in the longitudinal direction is also provided on the table 2, if you want to grind between points. On the machine bed 1 there is also a one vertical £ kale axis 7 in 90 ° -steps pivotable grinding spindle 8 mounted, which three only with their central axis 5 Sen 9, 11 and 12 shown grinding spindle ·) carries, which j with a surface grinding wheel 13 for surface grinding for example; as an end ring surface 14 of the workpiece 4 or an external grinding wheel 16 for external grinding, for example f;

a circumferential surface 17 of the workpiece 4 or an inner | ' grinding wheel 18 for internal grinding of a hole in the ϊ

Workpiece 4 are equipped, of which the | ^% Internal grinding wheel 18 is currently in its working position in a working area 19.

In the working position of the internal grinding wheel shown in FIG 18, the tailstock 6 can be in part from the Werkatückspindeletock 3 protruding area of the table stop, which is possible because the tailstock 6 according to Figure 2 from a, tailstock lower part 21 and a quill bearing a quill 22 comprehensive tailstock upper part 23 is composed, the tailstock upper part 23 mittele a pivot shaft 24 can be pivoted out of the working area 19 about a pivot axis 27 running transversely to the quill axis 26 is. A free surface 28 thus comes in the vicinity of the work area 19, over which the internal grinding wheel 18 can pivot into the work area according to FIG. In addition, there are the quill bearings the upper part 23 of the tailstock receiving surface 29 and a further receiving surface 31 for possibly further receiving an alternative sleeve bearing or a different one

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Stw.i SCHAUDT-tailstock-swiveling quill-I Schaudt File 23 - Stuttgart, 23rd Shark 1984

Quill provided at an angle of 120 ° to the free surface 28, which optionally by swiveling 120 ° around the swivel axis 27 can be pivoted into the plane of the table 2. Here, the quill 22 comes, for example, during external grinding one workpiece to be clamped between two tips is used, while the other receiving surface 31 is used for others Is swiveled into the table level with the appropriate equipment.

In Figures 3 to 5 are further details of the

Pivoting of the tailstock upper part 23 triggering pivot drive shown. According to Figure 3, the pivot shaft 24 is in the housing of the tailstock lower part 21 by means of ball bearings 32, 33, 34, the pivot shaft 24 being supported on the end face with a through the free surface 28 or receiving surfaces 29 and 31 limited swivel head 36 of the tailstock upper part 23 is firmly pinned and screwed. On the pivot shaft 24 sits a pinion 37, in which a rack 38 engages, which is from a central position in the work area standing quill 22 by means of two hydraulically or pneumatically operated adjusting cylinders 39 that are flanged together and 41 can be moved upwards or downwards via a common piston rod 42, which is a rotary movement in each case the pivot shaft 24 causes 120 ° in one direction or the other. To keep the rack 38 backlash-free, it is acted upon at the rear by a biasing element 43 in the form of a pressure plate 46 loaded by springs 44 .

The exact determination or compliance with the respective swivel position the pivot shaft 24 is supported by a partial disk 47 that is firmly pinned and screwed to the pivot shaft 24 ensures that with three recesses that are flat in their circumference at an angle of 120 ° to each other 48, 49, 91 is provided, in the respective pivot

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lStw .: SCHAUDT-tailstock-swiveling quill-I Schaudt File 23 - Stuttgart, May 23, 1984

Position of the graduated disk 47 an index bolt 52 engages. The index bolt 52 is guided by means of balls 53 longitudinally axially in the housing of the tailstock lower part 21 and free of play into a latching position by means of a piston rod 54 of a hydraulically or pneumatically operated adjusting cylinder 56 can be moved in or out of this. To protect against any possible pressure drop in the actuating cylinder 56, the Index bolt 52 is also acted upon by a biasing element 58 designed as a spring and engaging on a collar 57. The index bolt 52 is also secured against rotation by a locking pin 59, which radially engages in a longitudinal groove 61 of the collar of the index bolt 52

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Claims (1)

,,, I _V «ft ·« · · t · I , 19 ■ ·· ti · χ Stm .: SC'iAUDT-tailstock-swiveling quill-I Schaudt File 23 - Stuttgart, May 23, 1984 Expectations 1. Tailstock for a grinding machine, in particular a multi-purpose grinding machine with a grinding headstock equipped with a plurality of grinding tools that can optionally be moved into a work area, characterized in that the tailstock (6) is formed from two parts (21, 23) which can be moved relative to one another, of which the part (23) forming the sleeve bearing can be moved out of the working area (19).
15th 2. Tailstock according to claim 1, characterized in that the pin bearing (23) by means of a Schtienkantriebes (38, 39) can be pivoted out of the working area (19) about a pivot axis (27) running transversely to the quill axis (26) is. 3. Tailstock according to claim 1 and / or 2, characterized in that that the sleeve bearing (23) by means of a part plate (47) and an index bolt (52) in the respective Swivel position is lockable. 4. Tailstock according to one of claims 1 to 3, characterized characterized in that the quill support (23) is three arranged at an angle of 120 ° to one another or in the plane of rotation Has pivotable surfaces, two of which form receiving surfaces (29, 31) and one serves as a free surface (28). 5. Tailstock according to one of claims 1 to 4, characterized in that the pivot drive has a pivot shaft (24), which is provided with a pinion: in which a toothed rack (38) actuated by two adjusting cylinders (39, 41) engages. suffered I t I * * * * (HI a «» I · ·· t ·· I • · II «I IM · ·· Il ·· it it ··· at > I Stw .: SCHAUDT tailstock swiveling quill I * Schaudt file 23 - Stuttgart, May 23, 1984 5 6. Tailstock according to claim 5, characterized in that a biasing element (43) engages on the rack (38). 7. Tailstock according to one of claims 1 to 6, characterized in that the index bolt (52) has an adjusting cylinder 10 has the drive (56). 8. Tailstock according to claim 7, characterized in that a biasing element (58) engages on the index bolt (52). 15 2C 25 30 36 «· * Mt it Hl I ·