EP0957188B1 - Grinding of working elements of a carding machine - Google Patents

Description

The present invention relates to a device according to General term of the independent claim.

It is known grinding devices for periodic regrinding of the Use card clothing for cards. Regrinding or sharpening The cover sets are required once a certain amount of fibers was carded. The blunted by carding the fibers Sets deteriorate the carding result considerably. It is therefore in regular intervals required to sharpen the sets again. This is usually done by means of a grinding device, which in the Card, preferably only during the grinding process. If necessary, the grinding device is delivered to the cover sets and the tips of the lid sets are ground. The grinding takes place, for example, in the high-performance card C 50 of the machine factory Rieter AG in that a grinding roller slowly with a micrometer screw is fed until a slight grinding noise can be heard. ever Depending on the type of clothing wires, grinding sparks occur. As soon as the grinding noise or the grinding sparks along the entire length of the flat bar and the trimmings of the flat bar occur evenly, this is it Signs that all clothing wires are affected by the grinding device were and were sharpened.

The flat bars are arranged all around the drum. they seem only occasionally in a work area with the drum set together. The grinding device can be in a second section be arranged in which the flat bars are not with the drum interact. The clothing wires are not in this second section down towards the drum, but up. Thereby it follows that the flat bars in the section in which the Sets are ground, a deflection due to their own weight have those in the opposite direction compared to theirs Position during interaction with the drum set, is. This "Incorrect" deflection during grinding causes the Flat bars an incorrect distance of the flat set from the drum set at least in the middle of the flat bars.

A second way of grinding the flat bars is that the flat bars are removed from the card and on a special Grinding machine to be ground. This grinding machine exists, for example from a full grinding roller with a movable one arranged above it Carriage for 1 to 4 lids. When grinding, the Slide the lids over the roller constantly back and forth until they fit exactly set height are ground. A similar device shows CH-A-281 392.

Both grinding options have disadvantages. When grinding the flat bars in the card is the space available for the grinding device severely limited. In addition, when grinding the lid in the card the carding production ceased for a long time, so that productivity the card decreases. When grinding the cover outside the card the disadvantage that the accuracy of the ground flat bars only is difficult to control, especially with regard to other ground ones Flat bars, which are used in the card.

Grinding rollers for grinding sets of fiber treatment rollers are known per se and, depending on whether they are reel or drum, are used or pickup in the upper or uppermost area of the roller to be ground stated.

A disadvantage arises when grinding more than one, for example Meter long fiber treatment rollers if the sanding roller suitably has a sag due to its weight and construction its an error in the clothing height, over the length of the fiber treatment roller seen, arises. That in the middle of the fiber treatment roller the clothing is different due to the sag of the grinding roller grinded back than at the ends of the roller.

For cards with a roll length of one meter or less, could this error depending on the grinding roller design as within an error tolerance be accepted. For fiber treatment rollers, however are longer than a meter, the condition for the strength of the grinding roller, in order to practically avoid bending, so large that the Sanding roller production and operation with the sanding roller cumbersome and becomes expensive.

A solution therefore had to be found in order to also apply to fiber treatment rollers longer lengths to be able to use grinding rollers which are not the aforementioned conditions regarding strength and operation had to be asked.

The object of the present invention is therefore a method and a To create device with which the disadvantages described above avoided and with which fiber treatment rollers and in particular the Flat bars also the correct height and uniformity of each other Have sets.

The object is achieved by devices with the features of claims.

In a process for measuring ground cover sets The first flat rod to be measured becomes a flat rod for a card clamped laterally. This clamping can be done in a separate measuring device take place or in an advantageous manner in the grinding device itself, so that the flat rod is ground in one clamping and then is measured. The flat bar is clamped so that it is itself bent according to its own weight. advantageously, show the flat trimmings of the first flat bar above. The flat rod is loaded with a compensation device, which compensates for the "wrong" deflection of the flat rod, that a deflection as in the installed and carding state is simulated in the card. On the treads of this first flat bar a counterpart is placed. It will preferably be a similar one Flat rod used as a counterpart, which is already a ground Has set. With this second flat rod as a counterpart, the the same deflection as achieved when installed in the card. By stacking the flat bar and counterpart on the running surfaces a reference surface is selected for the flat bar, which also is decisive when the flat rod is later installed in the card. It it can therefore be assumed that if the set is related is properly ground on the tread, the flat rod also in the installed condition in the card has a proper condition. If the first flat bar and counterpart or second flat bar lying on top of each other, there is a gap between the ground set the first flat bar and the counterpart or the ground set of the second flat bar. Ideally, the distance is this gap constant over the entire length of the flat bar. It will therefore the thickness of this gap at least in some places along the length of the cover rod measured to determine whether the grinding process was carried out correctly has been. If the gap has different thicknesses, it is assume that an error occurred while grinding the flat bar is what causes the grinding process with changed settings repeat or the grinding system needs to be corrected.

To achieve a certain distance between the set and its counterpart, which has a measurable gap is advantageously provided that the gap between each with a spacer of a defined size the treads of the first flat bar and the counterpart or the running surfaces of the second flat rod is generated. The spacer causes especially when laying two flat bars the ground sets are at a distance from each other, which checked for uniformity over the entire length of the flat rod can be. The distance between the flat bar and the counterpart is choose so that a gap is created, which is then measured can be. The gap should not be too large, so that tolerances in the subsequent measurements are to be kept low.

It has proven to be particularly advantageous if the distance between the first flat bar and the counterpart measured using a leaf gauge is that along the gap between the first flat rod and counterpart is moved. If the distance between the blade gauge and the gap changes, see above it can be assumed that an incorrect grinding process has occurred Has.

Instead of a leaf gauge is in a more automated embodiment of the invention the use of one or more sensors, which the Measure the distance between the first flat rod and the counterpart. The sensor can be moved over the length of the flat bar and register the differences in the gap thickness, or it can several sensors can be arranged stationary, which in typical places Measure the distance between the flat bar and compare them. On Comparison may not make any significant differences between the individual Distances result.

An inventive device for grinding cover sets a card is with a jig for a first to be ground Flat bar and a grinding device equipped. The jig or the grinding device is with a slide of a linear guide connected so that the jig and the grinder are essentially movable at right angles to each other. The distance of the Clamping device with respect to the surface of the grinding device is adjustable. The cover is preferably such in the jig arranged that the cover set points upwards. The lid hangs with it due to its own weight, which is in the clamping device on the lid acts through. The grinding process takes place in that the grinding device and the jig with the flat bar is substantially rectangular are movable towards each other and thereby the lid set from the Grinding device is ground. To get the right grinding depth and to be able to compensate for any deflections is the distance of the Clamping device adjustable in relation to the surface of the grinding device. Due to the adjustability of the clamping device and the linear guide the movement of the jig with respect to the grinder exact grinding of the cover sets is achieved.

It is particularly advantageous if the grinding device has a compensation device assigned. A compensation device can by means of Torque is applied to the flat rod. Especially It is advantageous if the compensation device on the back of the flat rod to be ground and counter to the deflection of the flat rod suppressed. So that the deflection of the flat bar, which on Because of its own weight, it is compensated. In addition, the Flat bar by the compensation device advantageously still deflected further so that the actual deflection during the Insert is shown in the card. The surface to be sanded Lid set is therefore essentially flat or becomes after the grinding process to be level.

Especially when the jig with the slide of the linear guide is moved, it is advantageous if the compensation device is arranged on the carriage. Otherwise, it is advantageous if the Compensation device is attached directly to the clamping device. This ensures that the compensation device the flat rod always holds in the intended counterbend and thus an exact and enables uniform grinding. Especially with the arrangement on the slide of the linear guide for the jig ensured that the compensation device together with the Carriage and the clamped flat rod is moved and therefore none Relative movement between the compensation device and flat rod takes place. An exact adjustment of the compensation device in relation to the flat rod to be ground is thus guaranteed.

It is usually sufficient if the compensation device with respect to the Length of the flat bar is arranged substantially in the middle. So that's one sufficient counter-bending of the flat rod against its own weight and enables the lid set to be sanded evenly.

The construction of the compensation device is particularly simple if the compensation device is rotatably mounted about an axis. The Applying force to the back of the flat bar is very easy to design.

Is at the end of the compensation device facing away from the flat rod a counterweight is arranged by a corresponding one Lever arm causes the compensation device to be designed very simply can be. By means of the counterweight a predeterminable one becomes Force against the deflection of the flat rod. The counterweight can also by means of a pneumatically adjustable piston or a corresponding analog component. By a corresponding one Lever arm causes the counterweight to press the compensation device against the back of the flat bar by turning it the compensation device about the axis. To a predetermined one To achieve deflection of the flat bar is preferably provided that the distance between a pressure piece and / or the counterweight is adjustable from the axis. This changes the leverage ratio, which applied a different force to the flat bar becomes.

A second, in. Is advantageously on the slide of the linear guide Longitudinal direction of the grinding device or in the axial direction of the grinding roller aligned linear guide with a slide for a dressing device arranged. Through the constructive connection of the dressing device with the linear guide for the clamping device or the grinding device becomes an exact assignment and adjustability of the elements to each other guaranteed. The two linear guides are advantageously on a common machine belt mounted so that the assignment always is set exactly. To ensure appropriate wear of the grinding device To be able to compensate, the dressing element is preferably in relation adjustable to the surface of the grinder.

In a particularly advantageous manner, the clamping device has a stop for the defined reception of the flat bar, in particular with regard the running surface of the flat bar. After the tread of the flat bar a significant area for the exact assignment of the cover sets a drum set in the card, it has proven to be particularly advantageous exposed when the jig the lid on the tread defined. The distance between the tread and the tips is the Lid set can be precisely determined and the clamping device in relation to Grinding device adjustable accordingly.

Is a receptacle for the counterpart in the area of the clamping device or the second flat bar is arranged without removing the first flat bar the measurement of the flat clothing of the first flat bar possible. It is only the counterpart or the second Flat rod arranged in the holder of the jig, whereby a defined gap is created between the counterpart and the cover set. This Gap is then to be evaluated using the inventive method, whereby the exactness of the grinding process can be checked. Will be a second Flat rod used for this measurement, it also ensures that the flat bars, which are then used in the card, all are ground the same. To a second flat rod for the measurement of the grinding process, it is advantageous if the second flat bar with its set against the set of the first in the clamping device arranged flat rod is arranged. Thereby, that the two sets face each other is an unevenness in grinding the sets very quickly and easily ascertainable. It can also be determined whether the compensation device causes the deflection of the flat rod in a sufficient manner Has.

The measurement is carried out in such a way that the first flat rod in its middle Area is pushed up by the compensation device, creating a straight line of clothing along the length of the flat bar arises. The second flat bar, which is above the first flat bar is arranged in the holder of the jig, depends on the corresponding Deflection due to the fact that this is a similar Flat rod with the same bending ratios; i.e. it also arises in in this case a straight line of clothing. If both flat bars are the same have been sanded is the gap between the cover sets arises evenly over the entire length of the flat bar. If an error occurred during the grinding process, the Differ thickness of the gap compared to the other places. This is a Signs that the flat rod has to be reground, until a uniform gap over the entire length of the flat bar arose.

Around a defined contact surface for the flat bars or the flat bar and to get the counterpart is preferably the tread of the top bar consulted. With two flat bars, which compared with each other both treads are used directly or indirectly for connecting the flat bars. Depending on the design of the treads Flat bars, a gap can already arise if the treads are direct placed on top of each other and connected to each other. In most cases it will be necessary that the treads only indirectly as connection points serve by, for example, a spacer between the Treads is clamped. The spacers, which are manufactured very precisely are caused by their arrangement on the running surfaces of the flat bars, that a defined distance of the flat bars, according to their use in the card, arises. The resulting gap should be even and can be measured reliably.

Is the dressing device together with the grinding device on one Machine bed arranged, so an exact assignment is advantageously of dressing device and grinding device and a very precise Allows grinding. It is particularly advantageous if, in addition the linear guide for the flat bar is also arranged on this machine bed is because here also the setting of the flat bar to the grinding device or dressing device can be done very precisely.

In an advantageous embodiment of the invention, the grinding roller is in the Bracket removably arranged. This makes it possible to use the grinding roller easily removed from the dressing device and with a new one Replace grinding roller. But it is also possible to dress the Grinding roller for grinding fiber treatment rollers in the card use. The grinding and dressing device thus works as a maintenance device for the grinding roller and as a grinding device for the flat bars (double function or "combination device").

The dressing element is arranged below the grinding roller, so that the Grinding roller directed from below against the grinding roller a defined grinding process occurs, whereby the grinding roller follows the dressing has a defined shape in which the sag of the Grinding roller is very easy to determine.

Another method for grinding so-called. Sets of fiber treatment rollers, for example on a card, by means of a grinding roller. The grinding roller is a peripheral area of the Fiber treatment roller before or after the top surface line in one of a parallel position to the fiber treatment roller opposite position brought the fiber treatment roller to grind the clothing. The line of contact of the grinding roller lies along the entire length and forms a corresponding arc line on the surface of the fiber treatment roller. The line of contact is such that it is a uniform grinding of the sets causes. It is in this case according to the invention Show the sag when dressing the grinding roller a corresponding position of the grinding roller when grinding the sets compensated. The actual line of contact that arises is included so that the trimmings are ground properly.

By means of the abovementioned line of contact, a Grinding roller are used, which is a rotational hyperboloid-shaped during dressing Has taken shape. It is therefore when dressing the grinding roller no special precautions to be taken to such a rotational hyperboloid Avoid form. The dressing can therefore be done on very easy way to happen. The sag of the grinding roller is compensated for by the method according to the invention.

In order to compensate for different sagging of the dressed grinding roller, the position of the grinding roller is advantageously adjustable until the line of contact mentioned arises.

Alternatively, the grinding roller is on the top surface line of the fiber treatment roller arranged, the deepest surface line of the grinding roller touches this uppermost surface line of the fiber treatment roller. This too becomes the sag of the grinding roller when grinding the sets compensated, since the set at the same point on the grinding roller for Grinding is present, where previously the dressing element for dressing the Grinding roller was arranged.

In a device according to the invention for grinding the clothing of a Fiber treatment rollers are a medium in the field of fiber treatment rollers provided the appropriate position of the axis of rotation of the grinding roller ensure the fiber treatment roller. The grinding roller is in this Introduce means to the clothing of the fiber treatment roller grind. The means can be provided so that the expected Sag of the grinding roller has already been compensated and thus the previously mentioned Line of contact between grinding roller and fiber treatment roller is obtained.

It is to compensate for different sags of the grinding roller particularly advantageous if the means are adjustable pivot bearings, which in their location to the different shapes, especially hyperboloid Shapes of the grinding roller are customizable. The adjustment is made doing so such that a uniform line of contact between the grinding roller and fiber treatment roller arises.

Figur 1

eine Prinzipskizze einer Karde mit Deckeln, welche ohne Kompensationsvorrichtung geschliffen wurden,

Figur 2

eine Prinzipskizze einer Karde mit Deckeln, welche mit Kompensationsvorrichtung geschliffen wurden,

Figur 3

eine Prinzipskizze zum Messen des Spaltes zwischen zwei Deckelstäben,

Figur 4

zwei aufeinander angeordnete Deckelstäbe,

Figur 5

ein Ausführungsbeispiel einer Kompensationsvorrichtung,

Figur 6

ein Ausführungsbeispiel einer Schleifvorrichtung in Seitenansicht,

Figur 7

ein Ausführungsbeispiel einer Schleifvorrichtung in Vorderansicht.

Figur 8

eine halbschematisch dargestellte Schleifwalze mit einer Abrichtart gemäß des Standes der Technik sowie einer erfindungsgemässen Abrichtart.

Figur 9

eine Schleifwalze, abgerichtet gemäß Stand der Technik, in Blickrichtung C von Fig. 8

Figur 10

eine erfindungsgemäss abgerichtete Schleifwalze, in Blickrichtung C von Fig. 8

Figur 11

eine erfindungsgemässe Schleifwalze, drehbar gelagert, in Blickrichtung D von Fig. 10

Figur 12

einen Querschnitt durch die Fig. 11 entlang der Schnittlinien I-I

Figur 13

die Anwendung der erfindungsgemässen Schleifwalze an einer Faserbehandlungswalze, mit zwei Arten der Anwendung, halbschematisch dargestellt

Figur 14

eine Seitenansicht der Fig. 13, in Blickrichtung B in Fig. 13

Figur 15

eine Abrichtvorrichtung für die erfindungsgemässe Schleifwalze, halbschematisch dargestellt

Figur 16

ein Schnitt durch die Fig. 15 entlang den Schnittlinien II - II

Further advantages of the invention are described in the following exemplary embodiments. Show it

Figure 1

a basic sketch of a card with lids which have been ground without a compensation device,

Figure 2

a schematic diagram of a card with lids which have been ground with a compensation device,

Figure 3

a schematic diagram for measuring the gap between two flat bars,

Figure 4

two stacked flat bars,

Figure 5

an embodiment of a compensation device,

Figure 6

an embodiment of a grinding device in side view,

Figure 7

an embodiment of a grinding device in front view.

Figure 8

a semi-schematically illustrated grinding roller with a dressing type according to the prior art and an inventive dressing type.

Figure 9

a grinding roller, dressed according to the prior art, in viewing direction C of FIG. 8

Figure 10

a grinding roller dressed according to the invention, in viewing direction C of FIG. 8

Figure 11

an inventive grinding roller, rotatably mounted, in viewing direction D of FIG. 10

Figure 12

a cross section through FIG. 11 along the section lines II

Figure 13

the use of the grinding roller according to the invention on a fiber treatment roller, with two types of application, shown semi-schematically

Figure 14

13, in the viewing direction B in FIG. 13

Figure 15

a dressing device for the grinding roller according to the invention, shown semi-schematically

Figure 16

a section through FIG. 15 along the section lines II - II

Figure 1 shows a schematic diagram of a card without a compensation device. The card drum 1 is wound spirally with a drum clothing wire 5. The present representation of FIG. 1 shows a flat bar 2 ', which is in the working position with the drum 1. Because of its length the flat bar 2 'is over one meter and its own weight bent at the bottom. The deflection is essential for clarification represented more than it actually occurs. The deflection is in operation only a few hundredths of a millimeter. But this deflection already can lead to the cover 4 with the drum set in contact comes when the cover assembly 4 is not adapted to this deflection is as shown in this figure 1.

The grinding of the flat bar 2 by means of a grinding roller 8 without a compensation device is shown in the upper area of Figure 1.

Due to the weight of the flat bar 2, the flat bar 2 is in the Bending position bent down. The grinding roller 8, which is usually has a much larger section modulus and thereby has almost no deflection compared to flat bar 2, that the centrally arranged lid set 4 longer than the one laterally arranged Set of 4. When the flat bar 2 enters the working position, the flat bar 2, now as flat bar 2 ', against the deflection bent during the grinding process. This will cause the teeth of the cover set 4 that are too little ground and therefore too long now in comparison to the side teeth of the lid set 4 even closer reach the drum set 5. This will make the distance between Lid set 4 and drum set 5 in the middle of the drum very low compared to the outer area of the drum. This creates the risk that the cover and the drum set touch each other and to be damaged.

To reduce the risk of damage is a compensation device provided which the deflection during the operation simulated and which in relation to the axial length of the flat rod 2 presses essentially centrally against the flat rod 2 (see FIG. 2). So that will achieved that the flat rod 2 against its deflection due to the Dead weight is deflected. The flat rod becomes due to the deflection 2 brought closer to the grinding roller 8 in its center, whereby the cover set 4 more sanding in the middle than on the side areas, which results in shorter teeth in the middle areas. in the Working area, that is, in the area in which the flat bar 2 ' the drum 1 cooperates, the flat rod 2 'bends due to its own weight through in the middle. Because the lid set 4 in the middle is shorter than on the sides of the flat bar, the deflection of the flat bar by means of the shorter flat set. The distance between the cover set 4 and the drum set 5 is thus constant over the entire length or at least in a predetermined one Distance from each other. The distance can also be set in this way be that the distance between the cover set 4 and the drum set 5 is slightly larger in the middle of the drum than on the side areas. This causes the fiber flow to focus more on the center of the drum is concentrated and a lateral escape of the fibers from the drum is avoided. Such a distance ratio can thereby be brought about be that the deflection of the flat rod 2 'something during grinding is chosen larger than the deflection due to the weight of the cover rod 2 is in the work area. This will make the middle flat top teeth sanded even more and lead to a slightly larger distance to the drum set 5.

The required deflection of the flat rod 2 during the grinding process is most easily achieved in that the compensation device in the middle presses against the flat bar. This is shown in the figure 2 Arrow symbolizes. Such a force application causes Deflection of the flat rod 2, as caused by its own weight in the Working position is done.

In Figure 3 is a schematic diagram of a flat bar 2 with a ground Lid set 4 shown, over which a reference flat bar 30 with an already ground reference set 31 is arranged. On the top bar 2 acts a compensation device 10 in the direction shown Arrow. With this, the flat rod 2, as well as during the grinding process, bent upwards against the force of gravity, whereby a deflection is simulated as the flat rod 2 during the normal operation, namely when it rotates 180 °, with a lid set 4 would be located down in the card. The reference flat bar 30 is so arranged above the flat rod 2 that it, as in the installed state in the card, sagging. The slack becomes the reference set 31, which is arranged downward in a substantially straight Suspended line.

The two flat bars 2 and 30 are on running surfaces 25 and 26, respectively connected to each other by means of a spacer 35. The spacer 35 causes the flat bars 2 and 30 to be at a distance from one another, so that the sets 4 and 31 at a predetermined distance d from each other are removed. The distance d must be along the entire length of the cover bars 2 and 30 must be constant if the compensation device 10 and the grinding roller 8 were correctly adjusted or dressed. This constant Distance d is a measure of the correct grinding process, which in later Use in the card ensures that an excellent carding result can be achieved.

The storage of the flat rod 2 is such that the compensation device 10 a resistance is opposed via the treads 25, which about the clamping of the flat rod 2 described later he follows. The clamping must be such that the bending of the flat bar 2 essentially its natural bend when used in the card equivalent. Likewise, the storage of the reference flat bar 30 on the To provide spacers 35 so that the natural bending of the reference flat bar 30 or the bend of the reference flat bar 30 during there is nothing to prevent its storage in the card during operation. A correct measurement result can only be achieved if the storage is designed in each case as it applies to the respective flat bar 2 or 30 during its use in the card.

Figure 4 shows a cross-sectional view through the flat bar 2 and Reference flat bar 30. The two flat bars are rotated by 180 ° to each other arranged. As a result, the cover sets 4 and the reference sets are 31 directed against each other. By the previously described predetermined distance between the two flat bars 2 and 30, due to the Spacers 35, a predetermined one arises between the cover fittings 4 and 31 Distance d. This distance d can, for example, by means of a Leaf gauge 40 can be measured by placing the leaf gauge in several places of the distance d is introduced and the remaining distance between Leaf gauge and set 4 and 31 is assessed. The leaf gauge can be used for Measuring process from one end of the flat bar to the other end of the flat bar are passed, causing differences in the Intervals become noticeable. A more accurate measurement of the distance d can be done by means of sensors which are located at several or all points the length of the flat bars 2 and 30 measures the distance d. It can do this an even more precise assessment of the correct grinding process.

Should it be determined during the measurement that the distance d over the length the flat bars differ in an impermissible way, so the grinding process to be carried out again, the compensation device having a modified one Pressure on the back of the lid. Possibly. can also the grinder must be dressed again for a useful grinding result to obtain. After resetting or dressing the Grinding device is the measuring process by means of the blade gauge or the sensor again.

FIG. 5 shows a specific embodiment of a compensation device 10 shown. The compensation device 10 is on the clamping axis 15 stored. Due to the weight and design of the compensation device 10, it is usually sufficient if the compensation device 10 rests only on the clamping axis 15. Another Fastening of the compensation device 10 is usually not necessary. The compensation device 10 is on the clamping axis 15 in its Position held axially only by centering rings 18. Alternatively, too a turn in the clamping axis cause the axial centering.

The compensation device 10 has the pressure arm 11 and the weight lever 12 on. In the present embodiment, pressure arms 11 and weight lever 12 two separate components. Pressure arm 11 is on the Clamping axis 15. At one end of the pressure arm 11 is the slider 17th attached. The other end of the pressure arm 11 is in the weight lever 12 for an axial position of pressure arm 11 with respect to the clamping axis 15 and weight lever 12 connected to a tab 19. Furthermore is on this A spacer screw 14 is arranged at the end of the pressure arm 11. through the spacer screw 14 is the distance of the pressure arm 11 from the work area the flat bars changeable. A hook 20 of the weight lever 12 secures the weight lever 12 on the clamping axis 15 or the centering ring 18. The counterweight 13 is like the slider 17 by means of screws 21 attached to the weight lever 12 or the pressure arm 11.

Instead of the counterweight 13 or instead of the whole shown Compensation device 10 can be, for example, a pneumatic compensation device be provided with which in predeterminable Wisely and with sufficient repeatability against the back of the flat bar during the grinding process and the measurement of Lid sets can be pressed. The counterweight 13 could be replaced by a force generator (e.g. a spring).

FIG. 6 shows a section through a grinding and dressing device according to the invention. The grinding device, here the grinding roller 8, is above the flat bar 2 arranged. It is stationary with respect to a linear guide 44 arranged. A carriage 45 is attached to the linear guide 44 two sleeves 46 movably arranged. The carriage 45 is then along the linear guide 44 can be moved back and forth under the stationary grinding roller 8 by means of a drive, not shown. On the carriage 45 is a clamping device 43 for the flat bar 2 is arranged. The jig 43 has stops 47 which are in contact with the tread 25 of the flat rod 2 interact. Against the stops 47 Flat bar 2 pressed by means of the compensation device 10. The Compensation device 10 is pivotable about the axis 15 and acts the back of the flat bar 2, so that a bias as described above of the flat bar 2 can be done. The axis 15 is on the Carriage 45 attached and with this carriage 45 along the linear guide 44 reciprocable. This ensures that the preload the flat rod 2 by means of the compensation device 10 during the complete grinding process remains constant.

After grinding is finished, the carriage 45 is stopped in a position in which the flat rod 2 is outside the range of Grinding roller 8 is located. This position can correspond to that described above Procedure a reference flat bar 30 on the flat bar 2 are arranged and the measurement takes place directly in the carriage 45. For this purpose, there can be a receptacle 38 in the clamping devices 43 be provided in which the reference flat rod 30 is mounted, so that it corresponds to its bending line as it is installed in the card will be slack.

The grinding and dressing device also includes a stationary linear guide 50, which is arranged below the grinding roller 8. On the linear guide 50, a sleeve 51 is arranged, on which a dressing element 52 is arranged. Together they form the sleeve 51 and the dressing element 52 a dressing device 49 which is used for dressing the grinding device, here the grinding roller 8 is provided. The carriage 45 and the linear guide 50 are carried by a common machine bed. Through this is advantageously achieved that the dressing of the grinding roller 8 and the grinding of the set 4 can be done extremely accurately. The dressing element 52 is adjustable in the direction of the grinding roller 8, whereby the size of the dressing amount is adjustable. Depending on this Position and the position of the clamping device 43, in particular the stop 47, the degree of grinding of the clothing 4 is predetermined. The linear guide could be provided on the sled 45, but is preferred stationary compared to the stationary holder for the grinding roller 8 arranged.

FIG. 7 shows a front view of a grinding device according to the invention. The grinding roller 8 is arranged above the flat bar 2. Laterally in addition to the flat bar 2 and the grinding roller 8 are linear guides 44 arranged in which the sleeves 46 of the carriage 45 are guided. On a carriage 43 is arranged in each case in the carriage 45 the flat bar 2 is clamped. The compensation device 10 is rotatably mounted on the axis 15. The axis 15 is in turn in the carriage 45 attached and is together with the slide during the grinding process moved back and forth. The compensation device 10 is essentially arranged in the middle of the flat rod 2, making a sufficient exact deflection of the flat rod 2 is achieved.

During the grinding process, the dressing device 49 is on the side the grinding roller 8 arranged. The dressing device 49 is on the linear guide 50 movably guided in a sleeve 51. Due to the side arrangement the dressing device during the grinding process is guaranteed that the grinding roller 8 during the grinding of the flat bar 2nd is not acted upon by the dressing element 52. Only when a new one Dressing the grinding roller 8 is required, the carriage 45 positioned such that the flat bar 2 is outside the position of the Grinding roller 8 is located and the dressing element 52 on the grinding roller 8 can act for dressing the grinding roller 8.

The device can now be designed as a machine tool Dressing a full grinding roller is designed, which on the card (e.g. on the Drum or on the customer) can be used. Because the dressing element precisely on the rigid or fixed bed of the machine tool it creates a correspondingly precise straight dressing line at the dressing point - although also because of its deflection the long grinding roller after dressing has no cylindrical surface, but a Rotational hyperboloid forms (see Dubbel, "paperback for mechanical engineering", 17th edition, page A32). Below is a procedure or facilities for using such a grinding roller (in the form of a Rotational hyperboloids) on the roller set of a card.

The dressing device therefore comprises a holder for receiving a full grinding roller for a carding roller. A drive can be done with the grinding roller be coupled to rotate them around their own longitudinal axis. A linear guide The type used for machine tools is for the dressing element provided and is mounted on the machine bed. After this it has been dressed, the grinding roller has on the dressing element opposite line on a straight line. At this point now a flat rod set to be ground is fed to the grinding roller. The linear guide for the flat bar must be arranged accordingly become. The linear guide for the flat bar must therefore be accurate, both compared to the linear guide of the dressing element, as well as opposite the holder for the grinding roller, are aligned, which thereby simplifies is that the guides and the bracket on a common Machine bed are mounted.

Although the grinding roller has no cylindrical surface, the Deflection of the dressed roller does not affect the set of the ground Lid out because the grinding roller has a straight point where the flat bar set is ground.

8 shows a grinding roller 101 with a cylindrical roller shell 103 and a rotation axis 104, which is rotatably mounted on pivot bearings 102 is.

Due to the dead weight of the grinding roller 101, it bends, what on the one hand with a cylindrical roller shell 103.1 and an axis of rotation 104.1 is shown, this deflection for the sake of simplicity is not represented by means of curves, but by means of straight lines.

105 is a whetstone, which is in the top area and is shown in the middle of the length of the roller 101. Fig. 9 shows that with a in the oscillating directions 107 reciprocating whetstone 105, due to the aforementioned deflection of the grinding roller 101, a curved shape of the grinding roller marked 101.1 is created, what is shown with the roller shell 103.2. Here is also the Bombing is shown with straight lines for the sake of simplicity. 9 is a plan view in the direction C of Fig. 8, after the grinding roller has been dressed with sharpening stone 105.

With a whetstone 106 (Fig. 8), by means of which in the lowest area of the Grinding roller 101, this in the oscillating directions 107, all over Length is subtracted due to the aforementioned deflection the grinding roller 101 has a rotational hyperboloid shape shown in FIG Grinding roller 101.2, which is shown in FIG. 10 with the roller jacket 103.3 is. For the sake of simplicity, as mentioned for FIG. 9, the rotational hyperboloid Shape shown with straight lines. Further, not mentioned Features or characteristics correspond to the features mentioned earlier or marks and are therefore not repeated. 10 is one Top view in direction C of Fig. 8, after dressing the grinding roller with whetstone 106.

FIG. 11 now shows a grinding roller according to FIG. 10, but as a view in FIG Arrow direction D of Fig. 10. The surface line of the bent grinding roller 101.3, in the lowest area of the grinding roller is a straight line, which is shown in Fig. 12 is shown in cross section.

The figures. 13 and 14 show the application of the grinding roller 101.3 Fig. 11 by on a fiber treatment roller 108, for example Reel of a card or a customer (takes over the fleece of the reel) a card, which is rotatably supported about the axis of rotation 109 (not shown) are attached for grinding.

In one case it is the application in the top area of the Fiber treatment roller provided, for example, for a customer of the card, since there is no customer for grinding in this area elements necessary for operation must be removed.

In the other case, a grinding roller according to FIG. 11 is for that area a reel of a card is provided, for example between the feed roller, also called breeze and card cover. Here, however, the Grinding roller, as shown, provided in the inclined position according to the invention be, in which the bent grinding roller 101.3 so on the Surface of the fiber treatment roller 108 abuts the grinding roller 101.3 abuts the entire length of the roller surface, so that the Line of contact a corresponding arc line on the surface of the roller forms.

The correct inclined position of the grinding roller 103.3 can either be empirical be determined or calculated.

Bearing bodies 110 are provided for the empirical determination the directions of movement 112 are movable. This is the Direction of movement in the circumferential direction of the drum.

With the directions of movement 112.1 of the bearing body 110, in the radial direction of the drum there is the possibility to change the grinding depth. The latter also applies to the bearing body 111 and in directions of movement 112.1 for those in the uppermost area of a fiber treatment roller 108 used grinding roller 103.3, the bearing body 111 not in the circumferential direction 112 must be adjusted.

The long-known and used grinding rollers, which but have not yet been processed after the removal according to the invention, for short cards, for example, up to max. 1 m drum length used, have their own adjustable in their roller construction Bearing means for receiving the roller body, by means of which the directions of movement 112 and 112.1 can be performed.

The known grinding rollers also have internal drive motors on, so that no external for the grinding of a fiber treatment roller Drive devices only have to be provided the axes of the grinding rollers are correspondingly recorded on supports have to.

15 and 16 show a device for dressing (also pulling called) a grinding roller 101, which can be rotated and driven in pivot bearings 122 is mounted, with this pivot bearing coming from a lower half of the bearing Assemble 123 and an upper half of the bearing 124 to when removed upper half of the bearing 124 to be able to remove the roller 101 in direction A. It it is understood that previously one between the axis of rotation 104 of the grinding roller 101 and a motor 128 provided clutch 126 must be opened.

The pivot bearings 122 are supported on bearing supports 121, which in turn are provided on spindle bearings 120.

The spindle bearings 120 serve to rotatably accommodate a threaded spindle 119, give way to a sliding element movable in a base plate 114 115 back and forth along the grinding roller 101, what with a double arrow P is shown on a dressing tool 117.

The dressing tool 117 is connected to the sliding element via a carrier 116 115 connected and has an adjustable whetstone 118, softer predetermined against the grinding roller 101 can be advanced. The Mechanism around whetstone 118 within the dressing tool 117 is not shown here and is not essential to the invention.

The spindle 119 is driven by a drive motor 127, which by means of a Coupling 125 is connected to the spindle 119, driven. A control, around the direction of rotation of the drive motor 127 at the end of each Changing the path of the honing stone 118 is not shown here and described and not essential to the invention. The drive motor is 127 provided on a motor base plate 129 which is assigned to the base plate 114 is. The drive motor 128 also rests on a motor base plate 130, which is supported accordingly (not shown).

The present invention is not limited to the illustrated embodiments limited. So instead of the reference flat bar 30 is also a counterpart selectable, which has the given ideal line. The resulting one The gap between the ideal line and the flat rod can then be used Measurement of the grinding result can be used. Likewise is one compensation device of a different type than the one shown here can be used, to apply the procedure for measuring the ground lid fittings to be able to. As a grinding device is next to the grinding roller shown a traversing grinding wheel or a grinding block are also possible.

Claims (13)

1. Device for sharpening flat clothings of a card with a clamping device for a first flat rod to be sharpened and a sharpening device, in particular a grinding roll, characterized in that the clamping device (43) or the grinding fixture (8) is connected with a carriage (45) of a linear guide (44), so that the clamping device (43) and the grinding fixture (8) are movable essentially at a right angle to each other and whereby the space of the clamping device (43) is adjustable in relation to the surface of the grinding fixture (8).
2. Device according to claim 1, characterized in that a compensation device (10) is arranged to the grinding fixture (8) which is effective on the rear side of the flat rod (2) and which presses against the bending of the flat rod (2) to be sharpened.
3. Device according to one or several of the preceding claims, characterized in that the compensation device (10) is arranged on the clamping device (43) or on the carriage (45) of the linear guide (44) of the clamping device (43).
4. Device according to one or several of the preceding claims, characterized in that the compensation device (10) with respect to the length of the flat rod (2) is essentially centrically arranged.
5. Device according to one or several of the preceding claims, characterized in that the compensation device (10) is mounted rotatably around an axis (15).
6. Device according to one or several of the preceding claims, characterized in that at the end of the compensation device (10) which faces in opposite direction of the flat rod (2), a force generator (13) is arranged.
7. Device according to one or several of the preceding claims characterized in that the space between a pressure piece (17) of the compensation device (10) and/or the force generator (13) of the axis (15) is adjustable.
8. Device according to one or several of the preceding claims, characterized in that in longitudinal direction of the grinding fixture (8), in particular in axial direction of the grinding roller (8), a second linear guide (44) with a carriage (45) is being provided for a dressing device (49).
9. Device according to one or several of the preceding claims, characterized in that a dressing element (52) of the dressing device (49) is adjustable in relation to the surface of the grinding fixture (8).
10. Device according to one or several of the preceding claims, characterized in that the clamping device (43) comprises a stopper (47) for the defined mounting of the flat rod (2), in particular in relation to the bearing surface (25, 26) of the flat rod (2).
11. Device according to one or several of the preceding claims, characterized in that within the range of the clamping device (43) a mounting means (38) is arranged for the counterpart and/or the second flat rod (30).
12. Device according to one or several of the preceding claims, characterized in that the second flat rod (30) with its clothing (31) is arranged opposite the clothing (4) of the first flat rod (2) being arranged in the clamping device (43).
13. Device according to one or several of the preceding claims, characterized in that the second flat rod (30) with its running surfaces (26) is directly or indirectly connected with the running surfaces (25) of the first flat rod (2).

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