EP1195457B1 - Grinding of working elements of a carding machine - Google Patents

Description

The present invention relates to a method and a device according to Generic term of the independent claims.

It is known grinding devices for periodic regrinding of Use flat covers on cards. Regrinding or sharpening The flat clothings are required as soon as a certain amount of fibers was carded. The blunted by carding the fibers Trimmings worsen the carding result considerably. It is therefore in regular intervals required to sharpen the trimmings again. This is usually done by means of a grinding device, which in the Carding, preferably only during the grinding process, is arranged. If necessary, the grinding device is delivered to the flat clothings and the tips of the flat clothings are ground. The grinding takes place, for example, in the high performance model C 50 of the machine factory Rieter AG characterized in that a grinding roller slowly with a micrometer screw is delivered until a slight grinding noise is heard. ever According to the type of clothing wires Schleiffunken occur. Once the grinding noise or the Schleiffunken over the entire length of the flat bar and the trimmings of the flat bar occur evenly, this is the Indicator that all the pickling wires are loaded by the grinding device were and were sharpened.

Grinding rollers are leveled by means of a dressing device, such as in CH 281 392 has been disclosed. These devices use a dressing element, which is arranged above the sanding roller.

The flat bars are arranged circumferentially above the drum. they seem only temporarily in a working area with the clothing of the drum together. The grinding device can in a second section be arranged, in which the flat bars not with the drum interact. The clothing wires are not in this second section directed downwards towards the drum but upwards. Thereby it follows that the flat bars in the section in which the Trimmings are ground, a deflection due to their own weights have that in the opposite direction, compared to theirs Position during the interaction with the drum set, is. These "wrong" deflection during grinding causes in the working position of the Flat bars a wrong distance of the flat set from the drum set at least in the middle of the flat bars.

A second possibility 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 grinder is for example from a full sanding roll with arranged above it, movable Carriage for holding 1 to 4 lids. When grinding leads the Slide the lids over the roller constantly back and forth until they are on one exactly set height are ground down.

Both grinding options have disadvantages. When grinding the flat bars in the card is the space available for the grinder strongly limited. In addition, when grinding the lid in the card the production of the card is set for a long time, so that the productivity the card decreases. When grinding the lid is outside the card the disadvantage that the accuracy of the ground flat bars only difficult to control, especially with respect to other honed Flat bars, which find their use in the card.

Grinding rollers for grinding sets of fiber treatment rollers are known per se and when grinding depending on whether tambour or takers in the upper or upper region of the roll to be ground stated.

A disadvantage arises when grinding, for example, more than one Meter long fiber treatment rolls, if the sanding roller accordingly their weight and their construction has a slack, due of which a defect in the clothing height, over the length of the fiber treatment roller seen, arises. That in the middle of the fiber treatment roller The set is different due to the slack of the sanding roller ground back as 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. In fiber treatment rollers, however, which are longer than one meter, the condition on the strength of the grinding roller, so as to avoid bending, so great that the Grinding roller production and operation with the grinding roller cumbersome and expensive.

It therefore had to be found a solution to even with fiber treatment rollers larger lengths, to be able to use sanding rollers which are not the above conditions regarding strength and operation had to be asked.

Object of the present invention is thus a method and a To provide device with which above-mentioned disadvantages avoided be and with which fiber treatment rollers and in particular the Flat bars also give each other the correct height and uniformity of Have trimmings.

The object is achieved by methods and devices having the features the independent claims.

In the new method for measuring ground flat fittings a flat bar for a card is the first flat bar to be measured clamped on the side. This clamping can be done in a separate measuring device done or in an advantageous manner in the grinding device itself, so that the flat bar ground in a clamping and then is measured. The flat bar is clamped so that he is bent according to its own weight in itself. advantageously, show the cover sets of the first flat bar after above. The flat rod is loaded with a compensation device, which compensates for the "wrong" deflection of the flat bar to that a deflection as in the installed and carded state is simulated in the card. On the treads of this first flat bar a counterpart is launched. It is preferably a similar Flat bar used as a counterpart, already a ground Set has. With this second flat bar as a counterpart is the same deflection achieved as in the card installed state. By stacking the flat bar and counterpart on the treads of the flat bar, a reference surface is selected, which also is decisive in the later installation of the flat bar in the card. It Therefore, it can be assumed that when the clothing with respect On the tread is sanded properly, the flat bar also in the installed state in the card has a proper condition. When first flat bar and counterpart or second flat bar on top of each other, there is a gap between the ground set the first flat bar and the counterpart or the polished set of the second flat bar. Ideally, the distance of this gap consistent over the entire length of the flat bar. It will therefore the thickness of this gap at least at some points of the length of the Dekkelstabes measured to see if the grinding process performed correctly has been. If the gap has different thicknesses, it is assumed that an error occurred during the grinding of the flat bar is, whereby the grinding process with changed settings too is repeated or the grinding system has to be corrected.

To achieve a certain distance between clothing and counterpart, which has a measurable gap is advantageously provided that the gap with a spacer of a defined size between the running surfaces of the first flat bar and the counterpart or the running surfaces of the second flat bar is generated. The spacer causes, in particular, when stacking two flat bars the polished trimmings have a distance from each other, which checked for its uniformity over the entire length of the flat bar can be. The distance between the flat bar and counterpart is to choose so that a gap is formed, which then measured can be. The gap should not be too large, so tolerances in the subsequent measurement are to be kept low.

As has proven particularly advantageous if the distance between measured the first flat bar and the counterpart by means of a Blässlehre which is along the gap between the first flat bar and counterpart is moved. If the distance between the wind gauge and the gap changes, so it can be assumed that a faulty grinding process took place Has.

Instead of a Blattlehre is in a more automated embodiment of the invention the use of one or more sensors advantageous, which the Measure the distance between the first flat bar and the counterpart. The sensor can be moved across the length of the flat bar and can register the differences in gap thickness, or it can a plurality of sensors to be arranged stationary, which in typical places of the flat bar measure the distance and compare with each other. One Comparison should not be significant differences between the individual Give intervals.

A device according to the invention for grinding flat clothings a card is with a jig for a first to be ground Flat bar and a grinding device equipped. The clamping device or the grinding device is with a carriage of a linear guide connected, so that the clamping device and the grinding device are movable substantially at right angles to each other. The distance of Clamping device with respect to the surface of the grinding device is adjustable. The lid is preferably in the clamping device arranged so that the cover set points upwards. The lid hangs with it by its own weight, that in the jig on the lid works, through. The grinding process takes place in that the grinding device and the jig with the flat bar substantially at right angles to each other are movable and thereby the flat set of the Grinding device is ground. To get the correct grinding depth and be able to compensate for any deflections, is the distance of the Clamping device with respect to the surface of the grinding device adjustable. Due to the adjustability of the clamping device and the linear guide the movement of the clamping device with respect to the Schfeifvorrichtung a precise grinding of the flat fittings is achieved.

It when the grinding device is a compensation device is particularly advantageous assigned. A compensation device can by means of Applying a torque to the flat bar done. Especially It is advantageous if the compensation device on the back of the To be ground flat bar and against the deflection of the flat bar suppressed. Thus, the deflection of the flat bar, which on The reason for its own weight is compensated. In addition, the Flat bar by the compensation device advantageously still further deflected, so that the actual deflection during the Insert is shown in the card. The surface to be ground the Lid set is thus substantially flat or is after the grinding process just be.

In particular, when the clamping device with the carriage 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 chuck. This ensures that the compensation device the flat bar always keeps in the intended opposite bend and thus a precise and uniform grinding process allows. In particular, in the arrangement on the carriage of the linear guide for the clamping device is so ensures that the compensation device together with the Carriage and the clamped flat bar is moved and thus no Relative movement between compensating device and flat bar takes place. An exact adjustment of the compensation device with respect to the flat rod to be ground is thus guaranteed.

In most cases, it is sufficient if the compensation device with respect to the Length of the flat bar is arranged substantially centrally. This is one sufficient counterbending of the flat bar against its own weight and a uniform grinding of the flat fitting allows.

Particularly simple is the construction of the compensation device, if the compensation device is rotatably mounted about an axis. The Force application to the back of the flat bar is thus very easy to design.

Is at the end remote from the flat rod end of the compensation device arranged a counterweight, so will by a corresponding Lever arm causes the compensation device designed very simple can be. By means of the counterweight becomes a predictable Force against the deflection of the flat bar causes. The counterweight can also by means of a pneumatically adjustable piston or a corresponding analog component done. By a corresponding Lever arm causes the counterweight pressing the compensation device against the back of the flat bar by making a twist causes the compensation device about the axis. To a predetermined Achieving deflection of the flat bar is preferably provided that the distance of a pressure piece and / or the counterweight is adjustable from the axis. This changes the leverage, whereby a different force is applied to the flat bar becomes.

Advantageously, on the carriage of the linear guide a second, in Longitudinal direction of the grinding device or in the axial direction of the grinding roller aligned linear guide with a carriage for a dressing device arranged. Due to 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 mounted a common machine belt, so that the assignment always is set exactly. To a corresponding wear of the grinding device To be able to compensate, the dressing element is preferably in relation adjustable to the surface of the grinding device.

In a particularly advantageous manner, the clamping device has a stop for defined recording of the flat bar, in particular with respect the tread of the flat bar. After the tread of the flat bar a significant area for the exact assignment of the flat clothings a drum set in the card is, it has to be particularly advantageous exposed when the jig the lid on the tread defined detected. Thus, the distance between tread and tips of Cover set exactly determinable and the clamping device with respect to Grinding device accordingly adjustable.

Is in the region of the chuck a receptacle for the counterpart or the second flat bar arranged so is without a removal of the first flat bar the measurement of the flat cover of the first flat bar possible. It is here only the counterpart or the second Flat bar arranged in the receptacle of the clamping device, thereby a defined gap between counterpart and flat set arises. This Gap is then evaluated using the inventive method, whereby the accuracy of the grinding process is verifiable. Will be a second Flat bar used for this measurement, it also ensures that the flat bars, which are subsequently inserted into the card, all the same, are ground. To get a second flat rod for the measurement To be able to use 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 bar is arranged. Thereby, that the two sets facing each other, is a nonuniformity in the grinding of trimmings very fast and easy ascertainable. It can also be determined if the compensation device causes the deflection of the flat bar in a sufficient manner Has.

The measurement is carried out such that the first flat bar in its middle Area is pushed up by the compensation device, whereby a straight line of the clothing over the length of the flat bar arises. The second flat bar, which above the first flat bar arranged in the receptacle of the clamping device hangs with the corresponding Bend through, since this is a similar Flat bar with equal bending ratios is; i.e. it also arises in In this case, a straight line of clothing. If both flat bars are the same have been ground, is the gap, which between the flat clothings arises, evenly over the entire length of the flat bar. If an error has occurred during the grinding process, the Thickness of the gap differ from the other locations. This is a Sign that the flat bar must be sharpened again, until a uniform gap over the entire length of the flat bar originated.

To a defined bearing surface for the flat bars or the flat bar and to obtain the counterpart is preferably the tread of the lidstick consulted. For two flat bars, which compared with each other Advantageously, both treads serve directly or indirectly for connecting the flat bars. Depending on the design of the treads of Flat bars, can already create a gap when the treads directly placed on top of each other and connected together. In most cases it will be necessary that the treads only indirectly as junctions serve by, for example, a spacer between the Tread 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 reliably measured.

Is the dressing device together with the grinding device on one Machine bed arranged so is advantageously an exact assignment caused by dressing device and grinding device and a very accurate Allows grinding. It is particularly advantageous if in addition also arranged the linear guide for the flat bar on this machine bed is, since this also the setting of flat bar to grinder Or dressing can be done very accurately.

In an advantageous embodiment of the invention, the grinding roller in the Removable bracket arranged. This makes it possible, the grinding roller easy to remove from the dressing device and with a new Replace the grinding roller. But it is also possible the dressed up Grinding roller for grinding fiber treatment rollers in the carding machine use. The grinding and dressing device thus operates as a maintenance device for the grinding roller and as a grinding device for the flat bars (double function or "combination device").

If the dressing element is arranged below the grinding roller, so that the Grinding roller dressed from below directed against the sanding roller is, then creates a defined grinding process, the grinding roller after the dressing has a defined shape, in which the sag of the Sanding roller is very easy to determine.

To solve the problem is 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 region of Fiber treatment roller before or after the uppermost surface line in one of a parallel position to the fiber treatment roller deviating position against brought the fiber treatment roll to thereby grind the trimmings. It is the contact line of the sanding roller over the entire length and thereby forms a corresponding arc line on the surface of the fiber treatment roller. The contact line is such that it a causes uniform grinding of trimmings. It is here in inventive Make the sag when dressing the sanding roll through a corresponding position of the grinding roller when grinding the trimmings compensated. The resulting actual contact line is included so that the trimmings are sanded properly.

By the above-mentioned touch line can advantageously a Abrasive roll are used, which during dressing a Rotationshyperboloid-shaped Has received form. It is therefore when dressing the sanding roller to make any special arrangements to such a rotational hyperboloid-shaped Avoid form. The dressing can therefore be up very simple way to happen. The sag of the sanding roller is compensated by the method according to the invention.

To compensate for different sags of the trained sanding roller, is advantageously the position of the sanding roll adaptable until the mentioned contact line is created.

Alternatively, the sanding roll becomes at the uppermost surface line of the fiber treatment roll arranged, with the deepest generatrix of the grinding roller touches this uppermost surface line of the fiber treatment roller. Also by this The sag of the sanding roller when grinding the trimmings compensated because the clothing at the same point of the sanding roller for Grinding rests, where previously also the dressing element for dressing the Abrasive roller was arranged.

In a device according to the invention for grinding the clothing of a Fiber treatment rollers are in the field of fiber treatment rollers means provided, which indicates the appropriate position of the axis of rotation of the grinding roller ensure the fiber treatment roller: The sanding roller is in this To bring funds to the clothing of the fiber treatment roller grind. The funds can be provided so that the expected Slack of the grinding roller already compensated and thus the aforementioned Contact line between grinding roller and fiber treatment roller is obtained.

To compensate for different sags of the sanding roller, it is Particularly advantageous if the means are adjustable pivot bearing, which in their location to the different forms, in particular hyperboloidal Forms of the grinding roller are adaptable. The adjustment takes place in such a way that a uniform contact line between the grinding roller and fiber treatment roll 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

FIG. 1

a schematic diagram of a card with lids, which were ground without compensation device,

FIG. 2

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

FIG. 3

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

FIG. 4

two flat bars arranged on top of each other,

FIG. 5

an embodiment of a compensation device,

FIG. 6

an embodiment of a grinding device in side view,

FIG. 7

an embodiment of a grinding device in front view.

FIG. 8

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

FIG. 9

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

FIG. 10

an abrasive roller dressed according to the invention, in the viewing direction C of FIG. 8

FIG. 11

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

FIG. 12

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

FIG. 13

the application of the inventive grinding roller on a fiber treatment roller, with two types of application, shown semi-schematically

FIG. 14

a side view of FIG. 13, viewed in the direction B in Fig. 13th

FIG. 15

a dressing device for the inventive grinding roller, shown semi-schematically

FIG. 16

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

Figure 1 shows a schematic diagram of a card without compensation device. The card drum 1 is spirally wound with a drum garment wire 5. The present illustration of FIG. 1 shows a flat bar 2 ', which is in working position with the drum 1. Because of its length of over one meter and its own weight of the flat bar 2 'after bent down. The deflection is essential for clarity represented stronger than it actually occurs. The deflection is in operation only a few hundredths of a millimeter. But already this deflection can cause the flat set 4 with the drum set in contact comes when the flat set 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 compensation device is shown in the upper part of Figure 1.

Due to the weight of the flat bar 2, the flat bar 2 in the Bending position bent downwards. The grinding roller 8, which usually has a much larger moment of resistance and thereby has almost no deflection compared to the flat bar 2, causes that the centrally arranged flat set 4 longer than the laterally arranged Set of 4 will. Upon entry of the flat bar 2 in the working position, is the flat bar 2, now as a flat bar 2 ', against the deflection bent during the grinding process. This causes that Too few ground and thus too long teeth of the flat cover 4th now even closer compared to the lateral teeth of the flat set 4 come close to the drum set 5. This will change 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 lid 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 work process simulated and which with respect to the axial length of the flat bar 2 in essentially centrally against the flat bar 2 presses (see Fig. 2). This will be achieved that the flat bar 2 against its deflection due to the Dead weight is deflected. Due to the deflection of the flat bar 2 closer in its center to the sanding roller 8, whereby the Dekkelgarnitur 4 is ground more in the middle than at the lateral areas, which results in shorter teeth in the middle areas. in the Work area, that is in the area in which the flat bar 2 'with the drum 1 cooperates, the flat bar 2 'bends by its own weight through in the middle. Because the flat cover 4 in the middle is shorter than on the sides of the flat bar, the deflection is of the flat bar compensated by means of the shorter flat set. The distance between the flat cover 4 and the drum set 5 is thus constant over the entire length or at least in a predetermined Distance from each other. The distance can also be set in this way be that the distance between the flat cover 4 and the drum set 5 in the middle of the drum is slightly larger than at the side areas. This causes the fiber flow more on the center of the drum is concentrated and a lateral deflection of the fibers from the drum is avoided. Such a distance ratio can be effected thereby be that the deflection of the flat bar 2 'during grinding something greater than the deflection by the weight of the Dekkelstabes 2 is in the workspace. This will make the middle lid yarn teeth even more ground and lead to a slightly larger distance to the drum set 5.

The required deflection of the flat bar 2 during the grinding process is most easily achieved by the fact that the compensation device in the middle presses against the lid bridge bridges. This is based on that shown in FIG Arrows symbolize. Such a force introduction causes a Deflection of the flat bar 2, as shown by its own weight in the Working position takes place.

In Figure 3 is a schematic diagram of a flat bar 2 with a ground Cover set 4 shown, above which a reference cover rod 30 with an already ground reference set 31 is arranged. On the lid 2 acts a compensation device 10 in the direction of the illustrated Arrow. Thus, the flat bar 2, as well as during the grinding process, bent upward against the gravitational force, whereby a deflection is simulated as the flat bar 2 during the normal operation, namely when turned 180 °, with flat fitting 4 would be located down in the card. The reference cover 30 is arranged above the flat bar 2, that he, as in the installed state in the card, sags. The sag becomes the reference garnish 31, which is arranged downward, in a substantially straight Line suspended.

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 each other, so that the sets 4 and 31 at a predetermined distance d from each other are removed. The distance d must be over the entire length of the Dekkelstäbe 2 and 30 be constant when the compensation device 10 and the grinding roller 8 were properly adjusted or trained. This constant Distance d is a measure of the correct grinding process, which in the later Use in the carding machine ensures that an excellent carding result can be achieved.

The storage of the flat bar 2 is such that the compensation device 10 is provided on the treads 25 a resistance, which about the described later clamping the flat bar. 2 he follows. The clamping must be such that the bending of the flat rod 2 essentially its natural curvature in use in the card equivalent. Likewise, the storage of the reference cover rod 30 on the Provide spacers 35 so that the natural bending of the reference cover rod 30 and the bending of the reference cover rod 30 during its storage in the card during operation opposes nothing. A correct measurement result can only be achieved if the storage is configured in each case as they on the respective flat bar. 2 or 30 takes place during its use in the card.

Figure 4 shows a cross-sectional view through the flat bar 2 and the Reference cover rod 30. The two cover rods are rotated 180 ° to each other arranged. As a result, the flat covers 4 and the reference sets 31 directed against each other. By the previously described predetermined distance of the two flat bars 2 and 30, on the basis of Spacers 35, formed between the flat clothings 4 and 31 a predetermined Distance d. This distance d can, for example, by means of a Blattle gauge 40 can be measured by the Blindenhre in several places of the distance d is introduced and the remaining distance between Blattle gauge and set 4 or 31 is judged. The Blafflehre can for the Measuring also from one end of the flat bar to the other end of the flat bar, whereby differences in the Distances become noticeable. A more accurate measurement of the distance d can be done by means of sensors which at several or all locations the length of the flat bars 2 and 30 measures the distance d. It can do this an even more accurate assessment of the correct grinding process done.

Should be determined during the measurement that the distance d over the length the flat bars differs in an impermissible way, so has the grinding process be done again, the compensation device with a changed Pressing the cover back has to act. Possibly. can also the grinding device must be re-dressed to a useful grinding result to obtain. After re-setting or dressing the Grinding device is the measuring process by means of the Blattlehre or the sensor make again.

FIG. 5 shows a concrete exemplary embodiment of a compensation device 10 is shown. The compensation device 10 is on the clamping axis 15 stored. Due to the weight and the design of the compensation device 10, it is usually sufficient if the compensation device 10 rests only on the clamping axis 15. Another Attachment of the compensation device 10 is usually not required. The compensation device 10 is on the clamping axis 15 in their Position only by centering rings 18, held axially. Alternatively, too a recess 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 are pressure arm 11 and weight lever 12 two separate components. Pressure arm 11 lies on the Clamping axis 15 on. 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 a relative to the clamping axis 15 axial position of pressure arm eleventh and weight lever 12 connected to a tab 19. Furthermore, on this End of the pressure arm 11 a spacer screw 14 is arranged. 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 12th secures the weight lever 12 on the clamping axis 15 and the centering ring 18. The counterweight 13 is as well as the slider 17 by means of screws 21 attached to the weight lever 12 and the pressure arm 11.

Instead of the counterweight 13 or instead of the entire illustrated Compensation device 10 may, for example, a pneumatic compensation device be provided with which in predeterminable Way and with a sufficient repeatability against the back of the flat rod during the grinding process and the measurement of Cover sets can be pressed. The counterweight 13 could but 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 of the flat bar 2 is arranged. It is stationary with respect to a linear guide 44 arranged. On the linear guide 44, a carriage 45 by means two sleeves 46 movably arranged. The carriage 45 is thereafter along the linear guide 44 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 clamping device 43 has stops 47, which with the tread 25th of the flat bar 2 cooperate. Against the attacks 47 is the Flat bar 2 is pressed by means of the compensation device 10. The Compensation device 10 is pivotable about the axis 15 and acts on the back of the flat bar 2, so that as described above, a bias of the flat bar 2 can be done. The axis 15 is at the Carriage 45 attached and with this carriage 45 along the linear guide 44 reciprocable. This ensures that the bias of the flat bar 2 by means of the compensation device 10 during the complete grinding process remains constant.

After completion of the grinding, the carriage 45 is stopped in a position in which the flat bar 2 outside the range of Grinding roller 8 is located. In this position may correspond to those described above Proceed with a reference cover rod 30 on the flat rod 2 are arranged and take the measurement directly in the carriage 45. It can for this purpose in the jigs 43 a receptacle 38th be provided, in which the reference cover rod 30 is stored, so that he according to his bending line, as in the installed state in the card will be hung.

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, the sleeve 51 and the dressing 52 form a dressing device 49, which 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 achieved in an advantageous manner that the dressing of the grinding roller 8 and the grinding of the set 4 can be done very accurately. The dressing element 52 is adjustable in the direction of the grinding roller 8, whereby the size of the dressing amount is adjustable. In dependence of this Position and the position of the clamping device 43, in particular of the stop 47, the degree of grinding of a set 4 is intended. The linear guide could be provided on the carriage 45, but is preferred stationary with respect to the stationary support for the grinding roller 8 arranged.

FIG. 7 shows a front view of a grinding device according to the invention. Above the flat bar 2, the grinding roller 8 is arranged. Laterally next 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. At the carriage 45 is in each case a clamping device 43 is arranged, in which the flat bar 2 is clamped. The compensation device 10 is rotatably mounted on the axis 15. The axis 15 in turn is in the carriage 45 attached and will be together with the carriage during the grinding process moved back and forth. The compensation device 10 is substantially arranged in the middle of the flat bar 2, whereby a sufficient exact deflection of the flat bar 2 is achieved.

During the grinding process, the dressing device 49 is laterally adjacent the grinding roller 8 is arranged. The dressing device 49 is on the linear guide 50 movably guided in a sleeve 51. Due to the lateral arrangement the dressing device during the grinding process is ensured that the grinding roller 8 during the grinding of the flat bar. 2 is not acted upon by the dressing element 52. Only then, if another Dressing the sanding roller 8 is required, the carriage 45th positioned so that the flat bar 2 outside the position of Grinding roller 8 is located and the dressing element 52 on the sanding roller. 8 for dressing the grinding roller 8 can act.

The device can now be designed as a machine tool, the Dressing a full grinding roll is designed, which on the card (for example at the Drum or on the customer) can be used. Because the dressing element guided exactly on the stiff or fixed bed of the machine tool At the dressing station, it produces a correspondingly accurate straight-line guideline - although because of its deflection, the long sanding roller too after dressing has no cylindrical surface, but a Rotational hyperboloid forms (see Dubbel, "Paperback for Mechanical Engineering", 17th edition, page A32). The following is a method or devices for using such an abrasive roll (in the form of a Rotationshyperboloiden) described on the roller set of a card.

The dressing device therefore comprises a holder for receiving a full grinding roller for a carding machine. A drive can work with the sanding roller be coupled to rotate about its 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 she has been trained, the abrasive roller on a dressing element opposite direction on a straight line. At this point should now be sent to a grinding flat rod trim the grinding roller. The linear guide for the flat bar must be arranged accordingly become. The linear guide for the flat bar must therefore exactly, both opposite the linear guide of the dressing element, as well as opposite the holder for the grinding roller to be aligned, thereby simplifying is that the guides and the bracket on a common Machine bed are mounted.

Although the grinding roller has no cylindrical surface, the effect Deflection of the trained roller does not affect the trim of the ground Cover off, because the sanding roller has a straight spot where the flat rod set is ground.

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

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

With 105 a whetstone is marked, which in the uppermost area and in the middle of the length of the roller 101 is shown. Fig. 9 shows that with a in the oscillating directions of movement 107 reciprocating Abziehstein 105, due to the aforementioned bending of the grinding roller 101, a cambered shape of the 101.1 marked abrasive roller arises what is shown with the roll shell 103.2. Here is the here Crowning represented with straight lines for the sake of simplicity. FIG. 9 is a plan view in the direction C of Fig. 8, after dressing of the grinding roller with the whetstone 105.

With a Abziehstein 106 (Fig. 8), by means of which in the lowermost region of Grinding roller 101, this in the oscillating directions 107, on the whole Length is subtracted, due to the aforementioned deflection the grinding roller 101 has a rotational hyperboloidal shape shown in FIG Grinding roller 101.2, which is shown in Fig. 10 with the roll shell 103.3 is. Here, as mentioned for Fig. 9 for the sake of simplicity, the Rotationshyperboloide Shape shown with straight lines. Other, not mentioned Features or characteristics correspond to the features mentioned earlier or characteristics and are therefore not repeated. Fig. 10 is a Top view in the direction of C of Fig. 8, after dressing the grinding roller with the whetstone 106.

FIG. 11 now shows an abrasive roller according to FIG. 10, but as a view in FIG Arrow direction D of Fig. 10. The generatrix of the bent abrasive roller 101.3, in the lowest part of the grinding roller is a straight line, which 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 at a fiber treatment roller 108, for example a Tambour of a card or a customer (takes over the fleece of the spool) a card which is rotatably mounted about the axis of rotation 109 (not shown) are mounted for grinding.

One is the application at the top of the list Fiber treatment roller provided for example for a customer of the card, because with a customer in this area for grinding no for the operation necessary elements must be removed.

In the other case, a grinding roller according to FIG. 11 for that area a drum of a card provided, for example, between feed roller, also called Briseur and Cardendeckel. Here, however, must Grinding roller, as shown, provided in the inventive inclined position be in which the deflected sanding roller 101.3 such on the Surface of the fiber treatment roller 108 is applied, that the grinding roller 101.3 rests against the roll surface over its entire length, so that the Contact line a corresponding arc line on the surface of the roller forms.

The correct skew of the abrasive roll 103.3 can be either empirical fixed or calculated.

For the empirical determination bearing body 110 are provided, which in the directions of movement 112 are movable. These are the Directions of movement in the circumferential direction of the spool.

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

The per se long known and used abrasive rollers, which but have not yet been processed after the removal according to the invention, because they are for short cards, for example, up to max. 1 m drum length were used, have in their roll design own adjustable Bearing means for receiving the roll body, by means of which the directions of movement 112 and 112.1 can be performed.

Also, the known grinding rollers have internal drive motors on, so that for the grinding of a fiber treatment roller no external Drive devices must be provided but only the axes of the grinding rollers are received in accordance with carriers have to.

Figs. 15 and 16 show an apparatus for dressing (also peeling called) a grinding roller 101, which rotatable in rotary bearings 122 and driven is stored, said pivot bearing is made of a lower half bearing 123 and an upper bearing half 124 together to remotely upper bearing half 124 to be able to remove the roller 101 in direction A. It It should be understood that one previously 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 are used for rotatably receiving a threaded spindle 119, soft a movable in a base plate 114 sliding member 115 reciprocates along the grinding roller 101, which is a double-headed arrow P is shown on a dressing tool 117.

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

The spindle 119 is driven by a drive motor 127, which by means of a Clutch 125 is connected to the spindle 119, driven. A controller, about the direction of rotation of the drive motor 127 at the end of the Movement path of the Abziehsteines 118 to change is not shown here and described and not essential to the invention. The drive motor 127 is provided on a motor base plate 129, which associated with the base plate 114 is. Also, the drive motor 128 rests on a motor base plate 130, which is supported accordingly (not shown).

The present invention is not limited to the illustrated embodiments limited. Thus, instead of the reference cover rod 30 is also a counterpart selectable, which has the predetermined ideal line. The resulting The gap between the ideal line and the flat bar can then be used for Measurement of the grinding result can be used. Likewise is one different compensation device than that shown here, can be used, to use the procedure for measuring the ground flat fittings to be able to. As a grinding device is in addition to the illustrated grinding roller Also a traversing grinding wheel or a sanding block possible.

Claims (10)

1. A method for the grinding of what are referred to as clothing of fibre treatment rollers (108), for example on a carding machine, by means of a grinding roller (101), characterised in that the grinding roller (101) is moved against the fibre handling roller (108), in a peripheral area of the fibre treatment roller (108) in front of or after the uppermost casing line, into a position which differs from a position parallel to the fibre treatment roller (108), in order thereby to grind the clothing, in such a way that the contact line of the grinding roller (101) is in contact over its entire length, and in this situation forms a corresponding curved line on the surface of the fibre treatment roller.
2. The method according to Claim 1, characterised in that the rotating grinding roller (101), mounted on bearings at both ends, when dressed is provided with a rotation hyperboloid shape.
3. The method according to one or more of the foregoing Claims, characterised in that the position of the grinding roller (101) can be adjusted until the contact line referred to is established.
4. A grinding roller for the performance of the method according to one of Claims 1 to 3, characterised in that the dressed grinding roller exhibits a casing surface in a rotation hyperboloid shape.
5. A device with fibre handling rollers (108), in particular a carding machine, characterised in that means are provided at the device containing the fibre handling rollers (108) in order to bring the grinding roller into position in such a way that the appropriate position is guaranteed of the axis of rotation of the grinding roller (101) at the fibre handling roller (108) for the performance of the method according to Claims 1, 2, or 3.
6. The device according to Claim 5, characterised in that the means are adjustable rotating bearings (122), which can be adjusted in their position.
7. The device according to Claim 5 or 6 with a grinding roller according to Claim 4.
8. A dressing device for a grinding roller according to Claim 4, whereby a holding device for the grinding roller (101) is arranged on a machine bed, with a drive unit for rotating the grinding roller (101) about its own longitudinal axis, and with a linear guide for a dressing element (e.g. a diamond) (177), which can be moved by a straight movement parallel to the axis of rotation of the grinding roller (101), characterised in that the dressing element (117) is arranged beneath the grinding roller (101) so that the grinding roller (101) is dressed from below, directed against the grinding roller (101).
9. The device according to Claim 8, characterised in that a further linear guide is provided on the bed, in order to present a casing bar of the grinding roller (101) at a point aligned by the element.
10. The device according to Claim 8 or 9, characterised in that the grinding roller (101) is accommodated in the holding device in a manner such that it can be removed.

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