DE8203790U1 - Device for simultaneous decorative grinding of several hollow glasses - Google Patents

Description

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21 406/7 30 / Tues

J. Walter Co. Maschinen GmbH, Ziegelwinkel 12, D ... 8640 Kronach / Ofr.

Device for simultaneous decorative grinding of several hollow glasses

The invention relates to a device for simultaneous Decorative grinding of several hollow glasses, which has several grinding stations, each with a receptacle for a hollow glass to be processed and a grinding spindle that carries a grinding wheel and is adjustable with respect to the receptacle include.

As in most areas of technology, machine grinding of hollow glasses also strives to rationalize the work processes and, in particular, to create the possibility of creating several hollow glasses at the same time, for which there are already automatic grinding machines. The known automatic grinding machines for the simultaneous processing of several hollow glasses are designed in such a way that the glasses to be ground are placed next to one another in a row and the automatic grinding machine has a corresponding number of grinding stations arranged next to one another. This so-called "in-line construction" ¹ has a number of disadvantages.

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On the one hand, the grinding wheels used in the individual grinding stations must be the same, since the movement of the grinding wheels is the same with regard to the series construction. It must therefore be used for all grinding wheels Match size and profile. This leads to considerable costs, for example with an eight-station. Machine the grinding wheels have to be purchased 8 times. However, the grinding wheels are diamond wheels. From this The costs are very high, since you have a large number of different grinding wheels for one machine required for attaching different profiles. Another disadvantage is that as a result of the similar movement the grinding wheels on the grinding spindles only ever achieve the same grinding profile on all hollow glasses can be. When applying a more complicated cut, it is therefore necessary to remove the hollow glasses from a grinding, machine to another or after retrofitting the grinding machine, the hollow glasses a second or even to process several times in the same machine. Finally, it is disadvantageous that all glasses are always used to change the glasses Grinding spindles must be stopped until all glasses have been replaced. This period is comparatively long. No grinding can take place during this.

The invention is based on the object to provide a grinding apparatus and a grinding machine which offers the possibility _t the same time more hollow glasses in a grinding process to process, but necessary for a comparatively small for the purchase of the grinding wheels investment, on the other hand there is a very high degree of flexibility in the cut and

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Lich the possibility exists much faster than with the known automatons to work.

To solve this problem, it is proposed according to the invention to design the device of the type mentioned at the outset in such a way that that the recordings of all grinding stations on a common, cyclically driven turntable at the same angular distance attached to each other and arranged along the circumference of the turntable, the grinding spindles on stationary supports will.

So it is with the device according to the invention of the previous customary principle of simultaneous and similar processing of all hollow glasses, which are arranged in a row, departed and instead worked in such a way that the hollow glasses to be ground are successively passed through the various grinding stations of the machine go through or can go through. In this context, each of the grinding stations can be equipped with a different grinding wheel be equipped. In addition, it is understandably possible for the movement of the grinding station to be different in each case to be programmed so that when passing through the hollow glass through the machine according to the invention several different Grindings can be applied one after the other, for example a wedge grinding in the pre- and post-grinding, a spherical grinding in Pre- and post-sanding, special decorations, e.g. olive, in the pre- and Regrind and even a bottom grind. Understandably, this means a great deal of variability in terms of the possible uses the machine according to the invention with significantly reduced investment costs for the grinding wheels at the same time.

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A particularly favorable embodiment of the device according to the invention is that on the turntable a recording is provided more than there are carriers with grinding spindles. In this case it can be replaced of a processed hollow glass take place with the turntable at a standstill and processing of the remaining hollow glasses, so that there are no additional downtimes for replacing the hollow glasses. For example one would be Very cheap design, with eight holders on the turntable, but only seven grinding spindles. In the presence of an additional receptacle, it is of course advantageous if, according to the invention, not from a carrier occupied space in the circumferential area of the turntable, an input and output station for the hollow glasses is provided which can automatically supply and remove them.

In order to enable automatic processing of the hollow glasses over their entire circumference, it is provided that the Recording for the hollow glasses around their axis of symmetry, each step by step and / or continuously by means of its own drive is rotatable.

It is further provided according to the invention that a support column is arranged centrally to the turntable, which a the number and position of the supports for the grinding spindles Corresponding number of radially outwardly pointing, radially adjustable support members for the hollow glasses for compensation which bears the grinding force acting on it. These support members are before the grinding wheels are in contact with the Hollow glasses moved outwards against the hollow glasses and thus prevent the hollow glasses from moving during the grinding process move and thereby the quality of the cut is impaired.

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The required mobility or adjustability of the grinding wheels is expediently achieved in that the the grinding spindles carrying the grinding wheel are each arranged on a grinding head opposite a feed slide by 180 ° around a first horizontal axis extending radially to the turntable and by about 45 ° around a perpendicular axis second horizontal axis is pivotable. In this way, the grinding wheel can be compared to the Adjust hollow glass.

The approach of the grinding wheel to the hollow glass in the grinding process takes place favorably in such a way that the grinding spindles carrying the grinding wheels each by means of a Feed carriage are moved, which in turn with respect to the associated carrier by means of separate feed units radial to u ^ d in the direction of the axis of rotation of the turntable is adjustable. The radial feed unit serving for the radial adjustment of the feed slide expediently comprises a membrane cylinder and a hydraulic shock absorber. It is also advantageous if the radial feed unit has two feed speeds, namely a rapid traverse for coarse positioning and a creep speed for Fine positioning.

The axial feed unit used to adjust the feed slide in the direction of the axis of rotation of the turntable is conveniently formed by a hydraulic cylinder or a DC motor with a ball screw spindle.

It goes without saying that it is very important to have the receptacles for the hollow glasses opposite the turntable or the grinding heads with the grinding spindles opposite the associated

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To be able to adjust the delivery slide precisely. This is achieved according to a proposal of the invention in that the recordings for the hollow glasses opposite the turntable and / or the grinding heads with the grinding spindles in each case opposite the associated infeed slide can be adjusted by means of positioning drives, which have a DC motor with a tachometer generator and incremental encoders for index positioning. In this case, the accuracy of the adjustment possibly even further improved if between the positioning drive and the respective part to be moved (Grinding head, recording) a backlash-free reduction gear is installed.

In order to enable the turntable to rotate without the need at the same time, the drive devices also to be arranged rotating for the recordings, it is proposed that the positioning drives for the recordings are arranged stationary opposite the turntable and each have a switchable coupling, preferably a magnet, clutch, attack on the receptacle located in the corresponding position.

The turntable is in a simple manner according to the invention by means of a Malters step drive in the angular distance rotatable between the recordings.

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Further features, details and advantages of the invention emerge from the following description of a preferred one Embodiment based on the drawing. They show, 'in each case schematically:

Fig. 1 is a plan view of a device according to the invention;

FIG. 2 shows a plan view of a grinding station on an enlarged scale compared to FIG. 1, and FIG

3 shows a side view of a grinding station with the associated, hollow glass to be processed.

The device according to the invention comprises, as the drawings clearly show, a turntable 1 which is approximately horizontal arranged and stepwise by means of a Geneva drive accommodated in the housing 2, for example is rotatable.

In the exemplary embodiment shown, eight receptacles 3 a to 3 h for hollow glasses 4 are arranged on the turntable 1. the Fixing the hollow glasses 4 on the recordings 3, which, for example, as can be seen from Fig. 3, can be substantially plate-shaped, for example by means of Vacuum, for which a vacuum rotary leadthrough 5 can be provided to support the receptacle 3 that does not have The suction lines shown are connected to a pump, not shown, in the area of the housing 2.

The recordings 3ä to 3h are along the circumference of the turntable 1 arranged at an even angular distance, in the present exemplary embodiment e.g. at an angular distance of 45 °.

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The recordings 3a to Jh are each one against the Turntable 1 rotatable. A first positioning drive 6, which, as FIG. 3 shows, is stationary below the ' Turntable 1 is arranged. The positioning drive is in the embodiment shown, for example from a direct current motor with tachometer generator and incremental encoder formed in order in this way a positioning in certain To enable angular divisions, which is necessary to make a cut of the hollow glasses 4 at a uniform angular distance to enable.

Below the vacuum rotary feedthrough 5, a backlash-free reduction gear 7 is attached to the turntable 1, via which the rotary movement of the positioning drive 6 on the rotary feedthrough 5 and thus on the respective receptacle 3 (a to h) is transmitted.

In order to enable free rotation of the turntable 1 despite the stationary arrangement of the positioning drive 6, at the same time but a secure connection between the reduction gear 7 and the positioning drive 6 is to be established a magnetic coupling 8 is provided which, when the turntable 1 is at a standstill, i.e. when the receptacles 3 are in the Working or grinding position are located, a connection between the positioning drive 6 and the reduction gear 7 manufactures. On the other hand, if the turntable 1 is to be rotated, the magnetic coupling 8 is interrupted accordingly of the electricity switched off.

Along the circumference 9 of the turntable 1 are shown in the Embodiment seven grinding stations 10 arranged, in such a way that the mutual angular distance of these grinding stations from one another corresponds to the angular distance of the

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Recordings 3 correspond to each other. This means that there is one grinding station fewer than the number of recordings 3a to 3h would correspond. The result is a position shown below in FIG. 1 for the receptacles 3a to 3h (FIG. 1 with respect to the recording 3h), in which there is no grinding station 10. At this point you can add a Attach the input and output station for the hollow glasses 4, which is not shown in the drawing. Bringing in and Dispensing of the hollow glasses in the area of this station takes place when using the device according to the invention during the period of time in which the hollow glass is processed by the grinding logs of the grinding stations 10.

The grinding stations 10 are designed to be identical to one another.

They each rest on a carrier 11 (FIG. 3). Every grinding station includes a, in the shown embodiment, however, possibly differently designed, Grinding wheel 12a to 12g. The grinding wheels 12 are driven by a motor 13. The motor 13 with the grinding spindle 12 is in each case mounted on a grinding head 14, which is about a first horizontal axis extending radially to the turntable 1 15 can be swiveled through 180 ° manually or by motor. At the same time, the grinding head 14 can rotate around a second horizontal axis 16 can be pivoted by about ί 45 ° to change the axis position of the grinding wheel 12.

The movements of the grinding head 14 are opposite a feed slide 17 possible, but rather both radially relative to the axis of rotation 18 of the turntable 1 as well

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is vertically adjustable with respect to the carrier 11. For vertical guidance of the delivery slide are used on the carrier 11 fastened pillars 19, along which an intermediate piece 20 is displaceable, with respect to which the feed slide 17 is radially adjustable.

A radial feed unit 21, which in the exemplary embodiment shown a membrane cylinder and hydraulic shock absorbers for generating the grinding pressure detected. This radial feed unit 21 can be operated at two feed speeds, namely a rapid traverse for coarse positioning and a crawl for fine positioning of the grinding wheel 12 in relation to the cabbage glass 4.

The one used to adjust the feed slide 17 in the direction of the axis of symmetry or rotation axis 18 of the turntable 1 Axial feed unit 22 can either be from a hydraulic cylinder or from a DC motor with ball screw del be formed.

For adjusting the grinding head 14 relative to the feed slide 17, at least around one of the horizontal axes 15 or 16, a second positioning drive 23 is used, the corresponding the first positioning drive 6 for the receptacles 3a to 3h also from a direct current motor with tachometer generator and incremental encoder. The second positioning drive is especially for positioning the grinding head 14 is provided with respect to the axis adjustment of the grinding spindle 12, i.e. for an adjustment of the grinding head 14 about the axis 16. An adjustment of the grinding head 14 around the axis 15 can usually be done by hand, since the position of the grinding wheel only from

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the basic shape of the glass depends, while a movement of the grinding head 14 about the axis 16 also during the grinding process may even be required to produce special decors.

In the middle of the turntable 1, a stationary support column 24 is finally provided, which is level with the point of application the grinding wheel T2 on the hollow glass 4 radially has outwardly projecting support arms 25 which are radially adjustable at their end, for example by means of a pneumatic cylinder Support members 26 carry. In operation, the support members 26 are set in such a way that they meet the hollow glass 4 on the outside just rest (Fig. 3) and thus absorb the grinding pressure generated by the grinding spindle 12.

The number and arrangement of the radial support arms 25 with the support members 26 correspond to what can be clearly seen in FIG lets the number and arrangement of the grinding stations 10.

The device according to the invention is now used as follows:

As FIG. 1 clearly shows, there are different grinding wheels at the different grinding stations 10 12a to 12g attached. An assembly would be, for example, such that the grinding wheel 12a for the rough grinding a wedge grinding, the grinding wheel 12b for the corresponding regrinding, the grinding wheel 12c for the Pre-grinding wheel and the I2d grinding wheel for regrinding a spherical joint are provided. The grinding wheels I2e and 12f can then be used for any other decoration, e.g. olives, be designed in each case in pre-grinding and post-grinding. The grinding wheel 12g can finally be used to produce a floor ball or a bottom star for a glass.

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Corresponding to that by means of the grinding wheels 12a to 12g The various drives of the associated grinding stations 10 are programmed so that * the grinding wheel to the required extent and depending on the shape of the hollow glass 4 to be processed vertically or moved radially, possibly also the adjustment of the grinding wheel 12 changed by rotating it about the axis 15 or 16 will.

Has the machine been set up accordingly, i.e. the appropriate Attaching grinding wheels 12a to 12g and programming the grinding stations, this is how in the exemplary embodiment shown 1 in the area of the receptacle 3h by means of the input and output station, not shown, a first hollow glass 4 applied. As soon as this is applied, the turntable 1 advances one step clockwise, whereby the hollow glass located on the receptacle 3h reaches the area of the grinding wheel 12a. Now this leads Grinding wheel 12a or the associated station through the first grinding process. The other stations are during the start-up of the device, i.e. as long as hollow glasses are not present in all stations at the same time, switched off.

During the grinding of the hollow glass in the area of the grinding wheel 12a, by means of the input and output device, a new hollow glass is placed on the receptacle shown at the bottom in FIG. 1, now the recording 3g applied.

As soon as the grinding process is done with respect to the grinding wheel 12a, the grinding wheel 12a moves back and forth the turntable 1 advances one step so that the

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The receptacle 3h in the area of the grinding wheel 12b, the receptacle 3g in the area of the grinding wheel 12a and the receptacle 3f reaches the area of the input and output station. Now there is again a grinding curtain, with the grinding wheel 12a carries out the wedge pre-grinding on the new hollow glass, while the grinding wheel 12b on the one on the receptacle 3h located hollow glass produces the wedge regrinding.

In a corresponding manner, new hollow glasses are placed in the area of the input and output station in cycles and then after the end of the longest grinding process, the turntable 1 is advanced by one step. This is repeated until there is a hollow glass to be processed in the area of all grinding stations 10 is. In the next step, the hollow glass finally processed by the grinding wheel 12g arrives yes is on the receptacle 3h, back in the position according to Fig. 1, i.e. in "the area of the input and output station. While the seven grinding stations now the hollow glasses located on the associated receptacles 3a to 3g accordingly process, the fully ground hollow glass can be removed from the receptacle 3h in the input and output station without any problem and a new, unpolished hollow glass is placed on top of it.

From the above description it follows that the device according to the invention on the one hand the possibility offers a multitude of cuts to be made on hollow glasses, on the other hand the possibility of continuous work. After all, only one grinding wheel is actually required for each cut, which means that the costs for the equipment with grinding wheels compared to the prior art can be reduced considerably.

Claims (1)

Expectations 1. Device for simultaneous decorative grinding of several hollow glasses, which has several grinding stations, each with a receptacle for a hollow glass to be processed and one carrying a grinding wheel opposite the recording include adjustable grinding spindle, characterized in that the recordings (3a-3h) all Grinding stations (10) on a common, cyclically driven turntable (1) at the same angular distance attached to each other and along the circumference (9) of the turntable (1) the grinding spindles (13) stationary supports (11) are arranged. 2. Apparatus according to claim 1, characterized in that a receptacle (3) is provided more on the turntable (1) is available as a carrier (11) with grinding spindles (13). 3. Apparatus according to claim 1 and 2, characterized in that not occupied by a carrier (11) Space in the circumferential area of the turntable (1) and a dispensing station for the hollow glasses (4) is provided. -2- -2- 4. Device according to one of the preceding claims, characterized in that the receptacles (3a-3h) for Hollow glasses (4) each with its own anti-i ^ bs (6, 7) are gradually and / or continuously rotatable. 5. Device according to one of the preceding claims, characterized in that centrically to the turntable (1) a support column. (2A) is arranged, which one in its number and position dn supports (11) of the grinding spindles (12-14) corresponding number of radially outwardly pointing, radially adjustable support members (26) for the hollow glasses (4) to compensate for the grinding force acting on them. 6. Device according to one of the preceding claims, characterized in that the grinding wheel (12) carrying grinding spindles (13) are each arranged on a grinding head (14) which is opposite a feed slide (17) by 180 ° around a first horizontal axis (15) extending radially to the turntable (1) and by about 45 ° a second horizontal axis (16) perpendicular to this is pivotable. 1. Device according to one of the preceding claims, characterized in that the grinding spindles (13) carrying the grinding wheels (12) are each moved by means of a feed slide (17) which, in turn, opposite the associated carrier (11) by means of separate feed units (21 , 22) is adjustable radially to un «i in the direction of the axis of rotation (18) of the turntable. -3- 8. Apparatus according to claim 7, characterized in that the radial adjustment of the feed slide (17) serving radial feed unit (21) a membrane cylinder and a hydraulic shock absorber. 9. Apparatus according to claim 7 and 8, characterized in that the radial feed unit (21) has two feed speeds has, namely a rapid traverse for coarse positioning and a creep speed for fine positioning. 10. Device according to one of claims 7 to 9, characterized in that the for adjusting the feed slide (17) in the direction of the axis of rotation (18) of the turntable (1) serving axial feed unit (22) __ from a hydraulic cylinder or a DC motor with Ball screw is formed, 11. Device according to one of claims A to 10, characterized in that the slide receptacles (3a-3h) for the hollow glasses (4) opposite the turntable (1) and / or the grinding heads (1A) with the grinding spindles (13) in each case opposite the associated feed slide (17) can be _{adjusted by means of positioning drives (6 #} 23), which include a DC motor with tachogenerator ¹ and incremental encoder for indexing positioning. -4- 12. The device according to claim 11, characterized in that between the positioning drive (6, 23) and the each part to be moved (grinding head 14, receptacle 3a-3h) a backlash-free reduction gear (7) is installed. 13. Apparatus according to claim 11 or 12, characterized in that the positioning drives (6, 23) for the receptacles (3a-3h) are arranged stationary opposite the turntable (1) and each have a switchable Coupling, preferably a magnetic coupling (7), on the one in the corresponding position Attack recording (3a-3h). 14. Device according to one of the preceding claims, characterized in that the turntable (1) is angularly spaced by means of a Maltese step drive between the recordings (3a-3hJ corresponding steps can be rotated.