EP0622134B1 - Device for greasing strip of plate-like workpieces - Google Patents

Abstract

The device has greasing rollers with bearings on bearing blocks. Each bearing (18) block is held on baseplates (16,17), via a bearing pin (24). The bearing block is loaded by a spring (23), which supports itself on block and baseplates. The bearing pin permits limited play in several deg. of freedom. Pressure medium cylinders (19,20) and guides (21) are located beside the bearing blocks, and are connected to the baseplates. Each block is held by two bearing pins, which are located symmetrical to the hollow axis (14,15), and at right angles on the baseplates.

Description

The invention relates to a device for controllable greasing of workpieces in strip or blank form with several with grease permeable material provided, hollow and coaxially aligned Greasing rollers, each on a hollow axle on both ends in connection with a base plate standing camp and arranged over at least two Pressure cylinder and two guides on the workpiece surface are applicable.

A known device of this type according to DE-C-41 05 364 can be done without previous conversion work flexible for the production of different surface divisions partial greasing of workpieces be used. The greasing rollers individually stored in a device rack and can for individual greasing at the same time or at different times to the facing workpiece surface or the Workpiece bottom surface can be attached. Every greasing roller is in a separate frame box at both ends whose side cheeks are mounted, with each side cheek with one leg of an L-shaped bracket over screwed a screw to the rack box and over the other leg with the through a through hole gripping knurled screw with a piston rod of a pressure medium cylinder detachably coupled is. The pressure medium cylinder in turn is spatially fixed attached to the base plate.

In this embodiment, the greasing roller via the pressure medium cylinder and the guide relative to the fixed base plate and thus also to Distance between workpieces guided.

Although the upper piston rod shaft with large side and with a great play of heights by a Extends through opening of the L-shaped bracket, is due to manufacturing-related differences in roll diameter, because of reaction forces emanating from the workpiece as well as because of the diagonal arrangement of the Pressure cylinder and the guides a tilt the piston rods of the pressure cylinder in this Through openings cannot be completely ruled out. This because both the leadership and the Pressure cylinder relatively rigid on the stationary Base plate are attached. In this regard, too which encompass the ball guides closely concentrically, cylindrical helical springs do not remedy the situation, since their job is only to shock and vibration-free greasing contact of the greasing rollers with the respective workpiece surface guarantee.

In a generic device of another type according to DE-C-35 07 846 are in an upper box and a lower box one hollow axis each for rotatable mounting stored by greasing rollers, in the side parts of these boxes. These boxes are vertical led against each other, for what on the end faces one pressure medium cylinder each offset diagonally to each other and a ball guide are arranged. This device is in need of improvement insofar than the greasing rollers relatively rigid over the base plate and the boxes can be attached to the workpiece surface are and between two different greasing processes the greasing rollers previously from their detents solved on the respective hollow axis, accordingly the desired lubrication to the workpiece again must be aligned and locked.

And finally there is one from DE-C-35 07 845 Device with an upper housing box and a lower housing box known in which the greasing rollers if possible, exactly opposite each other in one plane and these boxes each over four guide columns as well under the action of a concentric cylindrical Coil spring and a pressure cylinder are adjustable relative to a base plate. Here are the greasing rollers through the pressure cylinder Coil springs in the sense of a passage gap closure charged. Again, due to manufacturing reasons Roll diameter differences as well due to workpiece unevenness jamming within the Guides and uneven lubrication results on Workpiece occur.

Based on this state of the art, the Invention, the object of a device to create the genus mentioned above, the one hand uneven greasing results due to roller diameter differences or workpiece surface unevenness excludes and an elastic and tilt-free Attach the greasing rollers to the Guaranteed workpiece surface.

This task will solved by the combination of the features of claim 1.

This design creates a device their greasing rollers against the effect of supporting springs to compensate for roller diameter differences and limited by workpiece unevenness movable in the direction of all degrees of freedom as well as tilt-free and with all-round play are arranged on a base plate. The base plate will with at least two pressure medium cylinders and a guide hired to the workpiece surface, which also the possibility is opened of the base plate of one Robotic arm can be moved while maintaining the adjustment flexibility of the greasing rollers to each to allow the workpiece surface to be greased.

The above-described inventive solution does not include only one embodiment with only one both the bearing block as well as diametrically penetrating the hollow axis Bearing bolt, but also the further embodiment, where each bearing block is symmetrical by two to the hollow axis and perpendicular to the base plate Bearing pin is held.

According to an advantageous development of the invention consist of the bearing bolts with their head in the Base plate with countersunk Allen screws smooth shafts which are circular in cross section, which reach through the bearing blocks in circular bores with radial play and at their exit point via a threaded end are screwed with a nut. This can on the one hand the base plate not only at every stationary, but also on a movable base be attached to a robot arm, whereby by the radial play of the circular, smooth shaft the circular holes in the bearing block a mobility of Greasing roller in an infinite number of radial directions the circular bore of the pillow blocks is retained.

According to a first variant, the respective one exists Spring advantageous from a smooth shaft of the bearing pin with a radial distance encompassing cylindrical Coil spring with one end in the Base plate and with its other end in the bearing block embedded in a circular recess is. Through this training, the spring Mobility of the bearing pin within the circular hole the bearing block is not affected. Understands that the radial play of the cylindrical Coil spring with respect to the outer peripheral surface of the Shaft of the bearing pin is larger than this in relation to the inner surface of the circular bore in the bearing block.

According to a second embodiment, the spring one with one end on the base plate and with its other end hinged to the bearing block pneumatic spring educated.

Which of these two embodiments in each The need to be used depends essentially from the specific spring curve (spring force over Travel) with regard to the travel of the greasing roller in the direction of the workpiece surface to be greased from.

The bearing block advantageously consists of a split Clamping bracket, between the parts of which the end of the Hollow axis immovable by means of a screw connection is clamped. Because the greasing roller rotates is arranged on the hollow axis, this allows Arrangement of a stationary and easily sealable inflow of fat in the hollow axis.

In a further development of the invention is one of the base plates two the workpiece to be greased between them receiving greasing rollers or a row of greasing rollers arranged stationary, both Base plates are provided with side panels and on each Sidewall of a base plate the end of a pressure cylinder and a guide is attached that are advantageously arranged diagonally to one another. Thereby can on or on a single base plate several rows of coaxial or staggered Greasing rollers of only two pneumatic cylinders and two guides towards the Workpiece area are employed, which due to their limited movement in all degrees of freedom the existing diameter tolerances among them to avoid different greasing results due to their separately spring-loaded bearing articulation can compensate. It is advantageous on the outer edge of each side cheek the end of a pressure cylinder and in the geometric Middle of each side cheek the end a guided tour.

For total adjustment of one greasing roller or a number of them once on the workpiece surface and one more time on the lower surface of the workpiece are the pressure medium cylinders at one end, e.g. at the Sidewall of the base plate for the greasing rollers the workpiece surface, over an L-shaped angle and at the other end, e.g. on the side cheek of the base plate for the greasing rollers greasing the workpiece surface, over a U-shaped in cross section Brackets hinged to these side cheeks. This allows while maintaining their specific as well as elastic The mobility of the individual greasing rollers to be attached above and below the respective workpiece Rows aligned with each other with simple means become. For example, to align free end of the piston rod using a lock nut fixed at the L-shaped angle, whereas the Pressure cylinder in the U-shaped bracket of the side cheek the base plate above it is articulated is.

The guide advantageously consists of a rod with circular cross-section, at both ends in one Plain bearing of one side wall of two diametrically opposed ones Base plates is guided. This leadership can also from known ball guides and in the pressure cylinder consist of pneumatic cylinders.

Fig. 1 die Ansicht einer ersten Ausführungsform der erfindungsgemäßen Vorrichtung in Durchlaufrichtung eines zu befettenden Werkstückes mit je einer an einer unteren und einer oberen Grundplatte angeordneten Befettungswalze,

Fig. 2 die Ansicht in Richtung II-II von Fig. 1,

Fig. 3 die Ansicht in Richtung III-III von Fig. 1,

Fig. 4 die Ansicht einer zweiten Ausführungsform der Vorrichtung in Durchlaufrichtung eines zu befettenden Werkstückes mit mehreren koaxial sowie hintereinander angeordneten Befettungswalzen an einer unteren und einer oberen Grundplatte in Richtung IV-IV von Fig. 5,

Fig. 5 die Ansicht in Richtung V-V von Fig. 4,

Fig. 6 die Ansicht in Richtung des Pfeiles VI von Fig. 4,

Fig. 7 die Ansicht auf eine dritte Ausführungsform der erfindungsgemäßen Vorrichtung in Durchlaufrichtung des Werkstückes mit zwei gleichzeitig aufeinander zustellbaren Grundplatten an der Unter- und an der Oberseite des Werkstückes,

Fig. 8 die Ansicht in Richtung der Pfeile VIII-VIII von Fig. 7 und

Fig. 9 die Ansicht in Richtung des Pfeiles IX von Fig. 7.

Several embodiments of the invention are shown in the drawings. Show:

1 is a view of a first embodiment of the device according to the invention in the direction of passage of a workpiece to be greased, each with a greasing roller arranged on a lower and an upper base plate,

2 shows the view in the direction II-II of FIG. 1,

3 shows the view in the direction III-III of FIG. 1,

4 shows the view of a second embodiment of the device in the direction of passage of a workpiece to be greased with a plurality of greasing rollers arranged coaxially and one behind the other on a lower and an upper base plate in the direction IV-IV of FIG. 5,

5 shows the view in the direction VV of FIG. 4,

6 is the view in the direction of arrow VI of FIG. 4,

7 shows the view of a third embodiment of the device according to the invention in the direction of passage of the workpiece with two base plates which can be simultaneously moved towards one another on the bottom and on the top of the workpiece,

Fig. 8 is the view in the direction of arrows VIII-VIII of Fig. 7 and

9 is a view in the direction of arrow IX of FIG. 7.

1 to 3, there is the basic form of Device 10 according to the invention for controllable greasing of workpieces 11 from two greasing rollers 12, 13 coated with fat permeable material, e.g. with felt, encased and in each case on a hollow axis 14, 15 both ends 14a, 14b and 15a, 15b on one with one each Base plate 16, 17 related bearings 18th arranged and via at least two pressure medium cylinders (preferably pneumatically operated) 19, 20 and two Guides 21 on the workpiece lower surface 11a and Workpiece surface 11b are attachable.

According to the invention, each bearing 18 has at each end 14a, 14b and 15a, 15b of the hollow axes 14, 15 a bearing block 22 on who is acting against him 22 and the base plate 16, 17 supporting spring 23 about at least one limited game in several degrees of freedom allowable bearing pin 24 on the respective Base plate 16, 17 is held over the Pressure cylinder 19, 20 and the guides 21 in Direction adjustable on the workpiece surface 11a, 11b is. In the case shown, each bearing block 22 is from two symmetrical to the hollow axis 14, 15 and perpendicular bearing bolts arranged on the respective base plate 16, 17 24 supported. The device according to the invention however, also includes an embodiment in which each bearing block 22 and at the same time each end 14a, 14b; 15a 15b of the hollow axis 14, 15 diametrically from only one bearing pin 24 with a corresponding game is reached, as it is in the upper part of Fig.2 dash-dot line is indicated.

As from the lower part of Fig. 2, left half, emerges, the bearing bolts 24 are made with their Head 25 in the base plate 16, 17 countersunk Allen screws with smooth, circular in cross-section Shafts 26, which the bearing blocks 22 in circular holes 27 reach through with radial play and on hers Exit point via a threaded end 28 with a nut 29 are screwed. Each pillow block is covered 22 from a split clamp, between its parts 22a, 22b the respective end 14a, 14b; 15a, 15b the Hollow axis 14, 15 by means of one of two diametrically opposite Screws existing screw connection 30 is clamped immovable.

In all the figures, the respective spring 23 with the smooth shaft 26 of the bearing pin 24 radial distance encompassing cylindrical coil spring formed with one end 23a in the Base plate 16, 17 and with its other end 23b in the bearing block 22 in a circular recess is let in. Through the circular recesses in the base plates 16, 17 on the one hand and the bearing blocks 22 on the other hand becomes a relative shift the springs 23 to the bearing pin 24 prevented. A Relative shift between these two elements is only through the radial play of the circular through holes 27 within the bearing blocks 22 to the smooth shaft 26 of the bearing pin 24 allows. This Radial play is in an infinite number of radial directions of the bearing pin 24 possible. There is also a possible one Tilting movement perpendicular to the plane of the drawing in Fig. 2 as well as clockwise and counterclockwise of the same figure. Alternatively, the spring 23 can also by one with one end on the base plate 16, 17th and articulated at the other end to the bearing block 22, Pneumatic spring, not shown, to be replaced.

As can be seen from FIGS. 1 and 3, one of the Base plates, here e.g. the base plate 16, two between the workpiece 11 to be greased Greasing rollers 12, 13 or rows of these 12, 13 be arranged stationary. Both base plates 16, 17 are provided with side walls 31, each with a End of a pressure cylinder 19, 20 and a guide 21 is attached. Every pressure cylinder is there 19, 20 at one end over the free end 32a its piston rod 32 at an L-shaped angle 33 attached by means of a nut 34 and a lock nut 35, whereas at the other end 20a via an im Cross-section of U-shaped bracket 36 on the side cheeks 31 is articulated. About mother 34 and the lock nut 35 can the adjustment of the base plates 16, 17 to each other respectively.

The guide 21 consists of the representations a rod with a circular cross section, which at the end 21a the bracket 37 and at the end 21b in a plain bearing 38 on a side wall 21 of the two diametrically opposite base plates 16, 17 is guided. The Slide bearings 37, 38 can also consist of ball guides and the pressure medium cylinders 19, 20 from pneumatic cylinders consist.

In the second embodiment of the invention 4 to 6 are the same as Figs. 1 to 3 Parts with the same reference numerals. Each The embodiment differs from the embodiment 1 to 3 essentially by that the base plates 16, 17 with several greasing rollers 12, 13 with both coaxially next to each other as well parallel, the respective gaps of the previous one Row of greasing rollers 12, 13 overlapping greasing rollers or whose rows are populated.

As can be seen from Fig. 6, is on the outside Edge area 39 equidistant and symmetrical to Axis of symmetry 40 each the end of a pressure medium cylinder 19, 20 arranged. In the geometric middle range 41 of each side cheek 31, in the representation of the 6, therefore, exactly in the axis of symmetry 40, is the lower one End 21a, the guide 21 in a clamp 37 held while the upper end 21b of the guide 21 in a sliding bearing 38 slidably guided is. With this arrangement, an extremely stable as well as precise allocation of several greasing rollers 12, 13 ensured on only one base plate 16, 17.

Assume in the two execution examples 1 to 6 each have a fixed arrangement the base plate 16 and a relatively movable Base plate 17, only the upper base plate 17th with their greasing rollers 13 from the workpiece surface 11b are lifted off, whereas the workpiece 11 with its lower workpiece surface 11a always on the greasing rollers 12 rests and thus on this surface is continuously greased accordingly.

However, in certain cases, both the Workpiece surface 11b as well as the workpiece lower surface 11a not continuously, but only in partial areas to be able to grease with the greasing rollers 12, 13 both the greasing rollers 13 and the greasing rollers must 12 of the workpiece surfaces assigned to them 11b and 11a removable and re-attachable to it be.

A third embodiment of the invention, with which this is made possible in FIGS. 7 to 9 shown. Therein are in agreement with FIGS. 1 to 6 Parts with the same reference numerals. In the third embodiment according to FIGS. 7 to 9 are the base plates 16, 17 with their greasing rollers 12, 13 at the same time or at different times on the workpiece lower surface 11a or to the workpiece surface 11b applicable. To accomplish this relative shift each of these now needs to be moved Base plates 16, 17 a fixed plate 42, wherein between the base plates 16, 17 and the fixed plates 42 on each End four pneumatic cylinders 19, 20 are arranged. Thereby can over these pneumatic cylinders 19, 20 Base plates 16, 17 opposite the fixed plates 42 on the fixed guide 21 by means of the movable Slide bearing 38 moves relatively and thus the greasing rollers 12, 13 corresponding to the workpiece surface 11a or the workpiece surface 11b and be lifted off again.

The workpiece 11 is not shown Supported guide rollers. For loading on both sides of the workpiece surfaces 11a and 11b are the Pistons of the pneumatic cylinders 19, 20 can be loaded on both sides. The last described embodiment takes place especially used for large working gaps between the greasing rollers 12, 13, for example what is characteristic of differential travel presses.

Claims (12)

1. A device (10) for the controllable greasing of workpieces (11) in strip or plate form with a plurality of hollow greasing rollers (12, 13), which are provided with grease-permeable material, are aligned coaxial to one another and are respectively arranged on a hollow axle (14, 15) with both ends on a bearing (18) connected to a base plate (16, 17) and can be applied via at least two pressure medium cylinders (19, 20) and two guides (21) to the workpiece surface (11a, 11b), characterised in that the bearing (18) at each end (14a, 14b; 15a, 15b) of the hollow axle (14, 15) is formed by a bearing block (22), which is held on the respective base plate (16, 17) under the action of a spring (23) supported against the bearing block (22) and the base plate (16, 17) via at least one bearing bolt (24) allowing limited clearance in a plurality of degrees of freedom of movement, which bearing bolt comprises a smooth shaft (26), which is enclosed by the through bore (27) of the bearing block (22) with radial clearance in all radial directions and so as to be tiltable, and the base plate (16, 17) is adjustable via the pressure medium cylinders (19, 20) and the guides (21) in the direction of the workpiece surface (11a, 11b).
2. A device according to claim 1, characterised in that each bearing block (22) is held by two bearing bolts (24) arranged symmetrical to the hollow axle (14, 15) and perpendicular to the base plate (16, 17).
3. A device according to claim 1 or 2, characterised in that the bearing bolts (24) are formed by internal hexagonal screws recessed with their head (25) into the base plate (16, 17) and having smooth shafts (26), which are circular in cross section and penetrate the bearing blocks (22) in circular bores (27) with radial clearance and are screwed at their exit point via a threaded end (28) to a nut (29).
4. A device according to one of claims 1 to 3, characterised in that the respective spring (23) is formed by a cylindrical helical spring, which encloses the smooth shaft (26) of the bearing bolt (24) with radial clearance and is fitted with one end (23a) in the base plate (16, 17) and with its other end (23b) in the bearing block (22) in a circular recess in each case.
5. A device according to one of claims 1 to 3, characterised in that the spring (22) is formed by a pneumatic spring which is articulatedly connected at one end to the base plate (16, 17) and at its other end to the bearing block (22).
6. A device according to one of claims 1 to 5, characterised in that the bearing block (22) is formed by a divided clamping block, between whose parts (22a, 22b) the end (14a, 14b, 15a, 15b) of the hollow axle (14, 15) is non-rotatably clamped by means of a screw connection (30).
7. A device according to one of claims 1 to 6, characterised in that one of the base plates (16) of two greasing rollers (12, 13) receiving the workpiece (11) which is to be greased or rows of such rollers (12, 13) can be fixed in place, both base plates (16, 17) are provided with side walls (31) and the end of a pressure medium cylinder (19, 20) and a guide (21) is secured to each side wall (31) of a base plate (16, 17).
8. A device according to one of claims 1 to 7, characterised in that the end of a pressure medium cylinder (19, 20) is arranged in the outer peripheral region (39) of each side wall (31) and the slideably displaceable end (21a, 21b) of a guide (21) is arranged in the geometrical central region (41) of each side wall (31).
9. A device according to one of claims 1 to 8, characterised in that the pressure medium cylinders (19, 20) are articulatedly connected to the side walls (31) at one end via an L-shaped angle bracket (33) and at the other end via a bracket (36) having a U-shaped cross section.
10. A device according to one of claims 1 to 9, characterised in that the guide (21) is formed by a rod having a circular cross section, which is guided at both ends (21a, 21b) in a respective slide bearing (38) of a side wall (31) of two diametrally opposed base plates (16, 17).
11. A device according to one of claims 1 to 10, characterised in that the guides (21) are formed by known ball guides and the pressure medium cylinders (19, 20) by pneumatic cylinders.
12. A device according to one of claims 1 to 11, characterised in that the pistons of the pneumatic cylinders (19, 20) can be acted upon from both sides for application to and lifting from the workpiece surface (11a, 11b).

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