DE10232394B4

DE10232394B4 - Method and device for grinding a rotating roller

Info

Publication number: DE10232394B4
Application number: DE2002132394
Authority: DE
Inventors: Erwin Junker
Original assignee: Erwin Junker Maschinenfabrik GmbH
Current assignee: Erwin Junker Maschinenfabrik GmbH
Priority date: 2002-07-17
Filing date: 2002-07-17
Publication date: 2004-07-22
Anticipated expiration: 2022-07-18
Also published as: CN1668421A; JP4030998B2; KR101026324B1; EP1521663A1; CN100379520C; CA2491800A1; JP2005537140A; AT343453T; ES2276116T3; EP1521663B1; DE10232394A1; KR20050019813A; AU2003254370A1; CA2491800C; RU2005104233A; WO2004007145A1; DE50305509D1; BR0312660A

Abstract

Method for grinding the outer periphery of a rotating roller (6) held at its ends, with a rotating grinding wheel (13), the length of the roller (6) being a multiple of the grinding wheel width, characterized in that at least one cushion body (15, 23, 26, 34, 39, 40, 41) made of a solid elastic material or an elastic outer skin filled with an elastic pressure medium in the circumferential area opposite the grinding wheel (13) is placed against the roller (6) to be ground.

Description

The invention relates to a method for grinding the outer circumference a rotating roller held at its ends, with a rotating grinding wheel, being the length the roller is a multiple of the grinding wheel width as well two escaping devices.
In many large-scale and process engineering Lean, elongated rolls are required for the processes rotate during operation, partly driven and often from the inside heated or cooled Need to become. Such rollers can For example, a length of around 1000 mm and a diameter of 85 mm. The rollers are also often tubular with a thin wall down to 1 mm. The surface quality of these rollers and theirs dimensional stability high demands are made. The grinding of such rolls to the finished size and the required surface quality therefore high demands on professional skills.
A well-known adverse phenomenon when grinding outside of rollers is that they bend sideways when the grinding wheel acts on its peripheral surface. That can do that to lead, that the finished roller deviates from the cylindrical shape. In addition, the roller comes thereby in self-excited transverse vibrations, the so-called regenerative chatter. The consequence of this regenerative chatter are chatter marks on the peripheral surface the roller, which means a reduced surface quality and thereby emerged roller for render many applications unusable.
To the bending of rollers when Grinding the outer circumference To prevent it is known to use one or more rollers Set sticks or steadies on its outer circumference to support. The set sticks or bezels consist of steel supports, which cause the blank to rest. Above all, it leads Rest of the rotating roller on the steel setting sticks or steadies to tracks that also mean reduced surface quality and cannot be accepted. Known operational measures to eliminate the regenerative chatter have a slowdown the grinding process.

From the DE 1 627 998 A1 In this context, a device for grinding the outer periphery of a rotating roller held at its ends has become known, in which a rotating stick is provided opposite the rotating grinding wheel in the longitudinal direction of the roller. This setting stick is designed as a hydrostatic half bearing. The rotating roller is thus pressed into a liquid film during grinding, which tends to return the roller that dodges in front of the grinding wheel to its original position. In this way, contact between metal and metal is to be avoided and thus also an undesirable frictional load and wear on the roller or on the setting stick. This from the DE 1 627 998 A1 known device is very expensive in terms of equipment. In addition to the discharge of the cooling medium, a constant circulation of hydraulic fluid must be maintained so that the hydrostatic half bearing works properly. This means that there is a considerable additional need for hydraulic or cooling fluid, especially since in the case of such a partially open circuit, fluid continuously evaporates and in any case also contaminates. The known device must also be constantly monitored. If the liquid film in the hydraulic half bearing collapses only briefly, metal rubs against metal against the intended objective, which quickly renders the workpiece unusable. A further disadvantage of the known device is that the hydraulic half bearing can only be adapted to the diameter of the rollers, which changes as a result of the grinding process, in a complicated manner. This requires a laborious pliers design or a series of individually mounted and individually biased pressure pieces against the workpiece.

One from operational practice In contrast, known method of the type mentioned at the outset consists in that the roller is first pierced with a corundum existing grinding wheel is pre-ground. For this, the Roll to a pre-grinding dimension in the type that worked with the grinding wheel several times side by side is pierced until the entire length of the roller is rough-ground to this dimension is. Subsequently the same grinding wheel is dressed and then finely or finish-ground. Finishing is done by longitudinal grinding, with the rotating one Grinding wheel and the rotating roller in the longitudinal direction of the roller on the outer periphery be moved relative to each other. With a length of the roller of, for example For this purpose, 1000 mm are grinding wheels with a width of, for example 100 mm used. The disadvantage of the known method is firstly, that the grinding wheels made of corundum are often dressed Need to become. That can also happen during of a single finish grinding process. All in all the known grinding process is very lengthy.

The invention is therefore based on the object of providing a method and a device of the type mentioned at the outset which are structurally simple, work economically and do not require any special monitoring, and moreover easily adapted to the changing diameter of the rollers during grinding.

Regarding the procedure this task according to the characteristic Part of claim 1 solved by that when sanding at least one cushion body made of an elastic solid material or an elastic outer skin filled with an elastic pressure medium in the opposite of the grinding wheel Circumferential area is adjusted to the roller to be ground.

By according to the invention a cushion body an elastic solid material or an elastic, with a elastic pressure medium filled outer skin in the opposite of the grinding wheel Circumferential area is placed against the roller to be ground the transverse vibrations of the roller and also from the grinding wheel stemming Vibrations successfully damped. The regenerative chatter does not occur, and so are those dreaded Chatter marks no longer recorded. Unlike the ones from Steel existing stakes or bezels namely leads the compliant Upholstery with no traces that indicate reduced surface quality and for the specialist can be recognized immediately.

In contrast to a moving one Set stick, which is a hydrostatic half bearing as a support for the has a grinding roller, a cushion body fits out an elastic solid material or from an elastic filled with a pressure medium shell automatic to every diameter of the workpiece on, indifferent how this is reduced in the course of the grinding process. Compared to the construction of the hydrostatic half bearing is low; in principle is also not an additional circulation of liquid required and difficult monitoring processes are eliminated, because sliding from metal to metal is impossible. With the available today standing materials, especially plastics, is the execution of a such a cushion body easily possible being a tolerable one too There is a compromise between the acquisition costs and the service life.

The regulation of the grinding wheel opposite Circumferential area means that the flexible cushion is approximately the same Radially opposite grinding wheel to be attached to the opposite side of the roller. It still is not to understand this regulation in a strictly geometrical sense, because. a successful fight of the vibrations is also possible then is when the point where the resilient pad is placed against the roller is opposite the grinding wheel radially and axially in a certain area is varied. With the method according to the invention, a significant shortening of the grinding process, which are up to 50% compared to the known method can. Adjusting the flexible pad leads to plunge grinding just as successful as with longitudinal grinding.

With the method according to the invention the adverse vibrations become so successful suppressed that processing using CBN grinding wheels is possible. A special one There is therefore an advantageous embodiment of the method according to the invention in that the roller is used in a single clamping A ceramic bonded CBN grinding wheel is pre-ground and finished and the adjustment of the flexible cushion at least when regrinding he follows.

The following advantageous embodiments of the inventive method relate to how the cushion body is attached to the roller and if necessary towards her is moved.

Wide range of applications arise when the contact force with which the cushion body is applied the roller is turned on, is adjustable and before the start of the grinding process can also be zero. The employment of at least a cushioned body takes place because the roller is under the influence of the machining forces of the grinding wheel bends in the direction of the cushion body.

An operationally special one Control of the positioning force is easy to control a pneumatic adjustment of the flexible cushion body the roller.

The method according to the invention is simplest according to one further embodiment carried out in that the employment of at least one cushion body while grinding at a constant point in the longitudinal extension the roller takes place. For example, if the roller is between tips is stored and the grinding wheel on the outer circumference of the roller in the longitudinal direction past becomes the upholstered body preferably arranged essentially in the axial center of the roller, because the strongest transverse vibrations there occur.

Because of the friction occurring between the cushion body and the roller during grinding, it is advantageous if a liquid or gaseous lubricant is supplied to the contact point of the cushion body on the roller. The associated method can be designed particularly simply in such a way that the lubricant is formed by the pressure medium of the cushion body and the contact point by outlet openings 35 is supplied, which are located in the outer skin of the cushion body facing the roller.

Get further refinements on how the grinding method according to the invention in detail is controlled.

A certain longitudinal contour of the roller during grinding can be achieved in that the cushion body is adjusted transversely to the roller in such a way that the roller bends during the grinding process and in the end due to the grinding there was a longitudinal contour of the roller with a slightly concave or convex curvature. The roller takes on a desired deflection during grinding without transverse vibrations occurring. If the cushion body is at a certain small distance from the outer circumference when the roller is at rest, the roller will bend under the influence of the grinding wheel until it touches the cushion body. However, it is also possible to set a preload, in which case the roller is bulged in the direction of the grinding wheel. With correct control of the corresponding grinding processes, rollers with an axial longitudinal contour result which are concave or convex in the desired manner.

If the grinding wheel is in axial Direction moves relative to the roller to be changed, change also the resulting transverse vibrations, depending on the axial area the grinding wheel is straight. Therefore, it is advantageous for fine-tuning the grinding process when the contact force of the at least one cushion body while the grinding process is changed and / or for several upholstery bodies is set to different values. The change the contact force is determined in accordance with the respective axial range the roller take place in which the grinding wheel and / or the cushion body just on act on the roller. The required values can be calculated or practical tests can be determined quickly.

The invention also relates to a External grinding device of rollers, in particular for carrying out the method according to the invention the claims cited above.

So the task mentioned at the beginning according to claim 10 solved by a device for external grinding of rollers, in particular to carry out the method according to the Claims 1 to 9, with tensioning and drive links for clamping the roller at their front ends and for rotating the roller at least one grinding spindle driving at least one grinding wheel, which in a transverse to the longitudinal axis of the Roll extending direction is movable, which makes the grinding wheel is adjustable against the roller, with drives for mutual longitudinal displacement of roller and grinding wheel and with at least one in which the Grinding wheel located opposite the circumferential area of the roller Device through which an upholstered body made of an elastic Solid material also against the longitudinal direction of the roller whose scope is adjustable.

Particular attention is paid to the Design of the upholstery body to be judged according to claim 10 consists of an elastic solid material. A high quality, Foam plastic formed with closed cells, the one abrasion-resistant surface has or is provided with, can perform this task well. He will adapt to a certain extent to the outer contour of the roller and successfully dampen the vibrations in this way.

A second solution to the problem mentioned at the beginning is specified according to the invention in claim 11 with respect to the device. The device according to claim 11 differs from that according to claim 10 in that the upholstered body from an elastic outer skin filled with an elastic pressure medium consists.

An upholstered body made up of a hollow body an elastic outer skin formed and filled with a pressure medium, will be even better the outer contour adjust the roller as a cushion body made of an elastic Solid material. The print medium that the elastic outer skin fills, can a gas, preferably compressed air. A pressurized hollow body is to adapt to the outer contour also particularly suitable because the internal pressure depends on the grinding process to be carried out can be optimally adjusted. The dampening effect can be control particularly well in this way.

The device for starting the cushion body can, for example, on the machine bed or on a grinding table be present, which also carries the roller to be ground. The It can be done mechanically, electrically, or through a pressure medium.

The following configurations relate on how the hiring force is constructively advantageous and in its Targeted height can be applied. So it is for controlling a high quality one Grinding process essential that a control arrangement for adjustment the contact force is present with which the cushion body against the circumference of the roller to be ground is adjusted.

Are several along the roller to be ground arranged upholstery body present, it is advantageous that the pitch force of everyone cushion body individually and independently from the other upholstery bodies is adjustable.

Particularly good tax opportunities arise when the device for adjusting the cushion body one includes double-acting pneumatic thrust cylinder, on the Piston rod of the cushion body is attached. There are several along the roller to be ground arranged upholstery body available, each pneumatic thrust cylinder becomes its own Pressure control valve assigned. This is a perfect pneumatic one Control ensures with which the vibrations at several points of the axial extent successfully dampened the roller become.

Precisely because such cushion bodies adapt well to the outer contour of the roller, there will also be considerable friction between the cushion body and the roller. To reduce this, it is necessary that a lubricant and coolant be supplied to the installation point. For this are According to an advantageous embodiment, supply lines are provided which open in the region of the contact point of the flexible cushion on the roller and through which a lubricant is supplied to the contact point.

They come as lubricants usual in grinding technology Grinding emulsions, synthetic coolants and grinding oils. As well compressed air can also be considered. Be the lubricant leading Feed lines through the cushion body directly to Position of the upholstery body guided on the roller, This means that the lubricant is right where it works the most can. With a liquid Lubricant forms between the roller and the cushion body Film that corresponds to the aquaplaning of the car tire and special is effective.

To carry out the process claim 2 listed two-stage sanding process with starting the upholstery body the roller, at least during regrinding, is regarding the device constructively provided in an advantageous manner that a grinding headstock is provided with two grinding spindles, optionally in the operative position and the first of which is a ceramic bonded CBN grinding wheel for pre-grinding and the second a ceramic-bonded CBN grinding wheel for finish grinding, being an automatic Coupling is provided by the at least one device for Starting the upholstery body to the roller to be ground is activated when the second grinding spindle is brought into operative position. The device according to the invention is based on this Way for automation prepared in modern mass production on production lines often requested becomes.

If the cushion body of the device according to the invention according to claim 11 made of an elastic outer skin filled with an elastic pressure medium exists, a gas, in particular, is advantageously used as the pressure medium Compressed air, used.

If there is also lubrication should, so are those led through the cushion body, the Leading lubricant Supply lines as hoses formed with the elastic outer skin of the cushion body one piece exist, the lubricant and pressure medium separated from each other are.

However, comes the print medium of the Upholstery itself as a coolant in question, it is structurally particularly simple that the elastic Outer skin of the compliant pad on their facing the roller to be ground contact surface with a large number of outlet openings is provided, through which the pressure medium for training the cooling and lubricating film passes to the attachment point. With this training must therefore constantly printing medium step out of the resilient pad to the attachment point. It is constant Supply of the pressure medium required, however, through pressure control valves can be easily mastered. The solution can be perfected even further that the pneumatic control of the thrust cylinder, on the piston rod there is the flexible cushion, in the process is included.

If lubricated with compressed air, see above an air cushion can also be formed, as is the case with hovercraft is known. It must be emphasized that the film of lubricant or the air cushion effectively reduces the friction losses during grinding reduce without reducing the effect of vibration damping becomes.

The invention is then based on of embodiments, which are shown in the figures, explained in more detail. In the figures that is The following are shown:
1 shows a device by performing the method according to the invention, wherein the phase of pre-grinding is shown.
2 sets the device according to 1 in the final grinding phase.
3 is an enlarged view according to the viewing direction AA according to 2 and shows details of the cushion body in cooperation with the roller to be ground.
4 has a different design of the upholstered body to the object.
5 shows the supply of a lubricant in the area of the cushion body.
6 illustrates a cushion body, the pressure medium also serves as a lubricant.
7 contains a diagram that illustrates the control of several devices for positioning elastic cushion bodies at different axially spaced locations on the roller.
1 first illustrates in a schematic representation a conventional cylindrical grinding machine for external grinding of cylindrical parts. In a top view is a machine bed 1 to recognize on which there is a workpiece headstock 2 and a tailstock 3 are located. Workhead 2 and tailstock 3 are mutually adjustable in the axial direction, so that by means of the tips located on them 4 and 5 the roller to be ground 6 clamped and driven to rotate. However, the roller can also be driven by drivers which are customary in the field and are therefore not shown separately here. The workpiece headstock 2 and the tailstock 3 are on a grinding table 7 which can be moved as a whole in the Z direction.
On the machine bed 1 there is also a grinding headstock 8th that is around a vertical swivel axis 9 is adjustable. The grinding headstock carries a first grinding spindle 10 and a second grinding spindle 11 , The first grinding spindle carries these 10 a first grinding wheel 12 which is used for pre-grinding or roughing while the second grinding spindle 11 a second grinding wheel intended for finish grinding or finishing 13 wearing.
By swiveling around the vertical swivel axis 9 the grinding headstock moves 8th in the direction of arrow B, so that either the grinding wheel 12 ( 1 ) or the second grinding wheel 13 ( 2 ) can be brought into active position. In addition, the entire grinding headstock 8th Can be moved numerically controlled in the X direction, which means that the grinding wheel, which is in the active position, is controlled to rest against the roller to be ground 6 comes.
The axial length of the roller to be ground is evident 6 a multiple of the grinding wheel width, so that for grinding during so-called longitudinal grinding, the grinding wheel and the roller to be ground have to be moved past one another in the axial direction. For this purpose, the roller on the grinding slide 6 be moved past the grinding wheel. However, the reverse arrangement is also possible for the roller to be ground to be stationary in the axial direction while the grinding headstock is being moved past it.
With 14 is a device for vibration damping designated by a cushion body 15 can be controlled controlled on the roller. 1 shows the facility 14 in their ineffective position; the cushion body is located here 15 at a distance from the surface of the roller to be ground. On the other hand, according to the presentation 2 the upholstered body 15 hired to the roller. It is located opposite the grinding wheel in the radial direction 13 , If the grinding wheel on the roller 6 acts, this will bend sideways and tend to transverse vibrations, especially if the length / diameter ratio is larger than shown in the drawing. Tubular rolls with a low material thickness are also particularly susceptible to such vibrations. By now the upholstered body 15 If moderate, adjustable pressure is applied to the roller, the transverse vibrations are damped and suppressed, so that the "regenerative chatter" feared by the experts does not occur.
In the representation according to the 1 and 2 is the facility 14 exactly opposite the grinding wheels 12 respectively. 13 , But if the roller to be ground 6 by means of the grinding table 7 is moved past the grinding wheel in the axial direction, the position of the device also changes 14 in relation to that of the grinding wheel. It is therefore advantageous if the axial extension of the roller to be ground 6 several devices with different cushion bodies are provided, such as the one to be explained in more detail later 7 illustrated.
But it is also conceivable to set up 14 To be arranged on the machine bed so that it always remains exactly opposite the grinding wheel in the active position. Finally, a solution is also conceivable in which only one device 14 provided, but this is moved axially together with the grinding spindle relative to the roller to be ground, so that the mutual association of grinding wheel and device 14 is preserved in any case.
The 1 and 2 at the same time illustrate a method which is particularly preferred according to the invention, in which the pre-grinding is carried out by means of a ceramic-bonded CBN grinding wheel and the device 14 for damping the vibrations remains out of operation. However, the grinding wheel 13 brought into the active position for finish grinding, this also automatically couples the device 14 activated like that in 2 is shown. During final grinding or finishing, transverse vibrations are effectively suppressed, so that optimal surface qualities are achieved despite the short machining time.
The 3 shows the view according to AA 2 in an enlarged view. It explains a device for vibration damping, which is actuated pneumatically. There is a base for this 16 provided that directly on the machine bed 1 or at the grinding table 7 can be attached. The base 16 carries a pneumatic double-acting thrust cylinder 17 in which a piston 18 can be applied from two sides. The piston 18 carries a piston rod 19 on which there is a mounting plate 20 located. On the mounting plate 20 is the upholstered body 15 glued or vulcanized. The cushion body can consist of a rubber-like material or a plastic with closed hollow cells, which is thereby particularly flexible and adaptable. It is crucial that the outer surface of the upholstery body 15 Although elastic, it is nevertheless resistant and abrasion-resistant. 21 and 22 are compressed air lines through which the push cylinder is controlled. He can therefore the cushion body 15 with precisely adjustable contact force against the roller 6 press down. As can be seen, the roller 6 , which in this case is a hollow roller, between the grinding wheel 13 and the compliant cushion 15 acted on both sides. The roller is thus under the contact force of the grinding wheel 13 dodge slightly, but occurring transverse vibrations due to the damping effect of the cushion body 15 be suppressed.
Also the basic position of the upholstered body 15 is adjustable before the start of the grinding process. For example, the initial force may be zero at the beginning, so that only under the action of the grinding wheel 13 pushing the roller in 6 in the poles terkörper 15 he follows.
In 4 is a facility 14 shown for vibration damping, in which the cushion body 23 is designed as a hollow body with an elastic outer skin, comparable to the pneumatic tire of vehicles. With a supply line 24 can, for example, compressed air into the interior of the cushion body 23 are introduced, whereby different elastic properties can be achieved. However, it is also conceivable to fill the cushion body with a liquid if an elastic retraction of the liquid is ensured. Filling with a gel is also an option.
The rest of the training of the facility 14 corresponds to that according to 4 , In particular, the upholstery body must also be positioned here 23 to the roller 6 with a special device such as a push cylinder.
The 5 also explains a cushion body filled with a pressure medium 26 , which is also here on a mounting plate 25 located and connected to it. The mounting plate 25 is to a supply line 27 connected for the pressure medium for which compressed air is primarily suitable. Via an internal one, in the mounting plate 25 located channel 28 the pressure medium is in the cavity of the cushion body 26 introduced therein. Through the upholstered body 26 are hoses 30 passed through with the outer skin of the cushion 26 consist of one piece, but no connection to the interior of the upholstery 26 to have. The hoses 30 are connected to a duct system 29 connected, which is in the mounting plate 25 and through which a cooling and lubricating medium by means of the hoses 30 directly on the contact surface of the upholstered body 26 on the roller 6 is applied. For this the hoses end 30 in outlet openings 31 that go straight to the roller 6 are directed. As can be seen, the outlet openings open 31 on the surface of the roller 6 , so that the coolant and lubricant gets exactly where it is most needed.
Designated with P11 and P12 pressure regulator, those for setting the optimal operating pressure of the media serve.
If the pressure medium located in the hollow cushion body can also serve as a coolant and lubricant, separate supply lines for the pressure medium of the cushion body on the one hand and the coolant and lubricant on the other hand are no longer required. The advantageous constructive realization shows the 6 ,
After that is on a mounting plate 32 another upholstered body 34 glued or vulcanized, using a feed line 33 via a pressure regulator P21 into the interior of the cushion body 34 leads. In this case the resilient pad is on the roller 6 facing end face with a number of outlet openings 35 Mistake. The pressure medium of the cushion body thus continuously passes through the outlet openings 35 towards the surface of the roller 6 out. In this case, the upholstery body 34 Continuously feed the pressure medium so that the required contact pressure is maintained.
The 4 to 6 show how well the inflatable cushion bodies adapt to the contour of the roller. In case of 5 and 6 It is achieved in a particularly secure manner that the cooling and lubricating medium forms a film between the cushion body and the roller, comparable to the water film in so-called aquaplaning or an air cushion in vehicles of the hoovercraft type. The training according to 6 is particularly advantageous if you want to work with an air cushion.
7 shows schematically how the control of the devices for vibration damping should take place if several of these devices along the axial extension of the roller to be ground 6 are provided. In the case shown there are three facilities 36 . 37 . 38 provided, each of which is a cushion body 39 . 40 . 41 to the roller to be ground 6 hires. The starting is done pneumatically, for which each of the facilities 36 . 37 . 38 a thrust cylinder according to the 3 can have. The vibration amplitudes can be seen in the middle of that between the tips 4 and 5 clamped roller 6 be larger than in the area of their outer ends, which are closer to the clamping points. Therefore, it is appropriate to adjust the facility 37 to choose higher than that of the facilities 36 and 38 , Correspondingly there is P in the compressed air supply line for each of the devices 36 . 37 . 38 its own pressure control valve 44 . 45 . 46 provided so that the thrust cylinder of each device can receive the optimal pneumatic pressure for vibration damping. In addition, the compressed air supply lines P and return line L are common for all devices.

1: machine bed
2: Workhead
3: tailstock
4: top
5: top
6: roller
7: grinding table
8th: Wheelhead
9: swivel axis
10: first grinding spindle
11: second grinding spindle
12: first grinding wheel
13: second grinding wheel
14: Facility for vibration damping
15: cushion body
16: base
17: push cylinder
18: piston
19: piston rod
20: mounting plate
21: Compressed air line
22: Compressed air line
23: cushion body
24: supply line
25: mounting plate
26: cushion body
27: supply line
28: internal channel
29: channel system
30: tube
31: outlet openings
32: mounting plate
33: supply line
34: cushion body
35: outlet openings
36 37, 38,: Facility for vibration damping
39, 40, 41: cushion body
42 43: control line
44 45, 46: Pressure control valve

Claims

Method of grinding the outer periphery of a rotating roller held at its ends ( 6 ), with a rotating grinding wheel ( 13 ), the length of the roller ( 6 ) is a multiple of the grinding wheel width, characterized in that at least one cushion body ( 15 . 23 . 26 . 34 . 39 . 40 . 41 ) made of an elastic solid material or an elastic outer skin filled with an elastic pressure medium in that of the grinding wheel ( 13 ) opposite circumferential area to the roller to be ground ( 6 ) is employed.
A method according to claim 1, characterized in that the roller ( 6 ) in a single setup, one after the other, each with a ceramic bonded CBN grinding wheel ( 12 . 13 ) is pre-ground and finished and the adjustment of the upholstery body ( 15 ) at least during regrinding.
Method according to claim 1 or 2, characterized in that the contact force with which the cushion body ( 15 ) to the roller ( 6 ) is set, is adjustable and can also be zero before the start of the grinding process.
Method according to one of the preceding claims, characterized by pneumatic adjustment of the cushion body ( 15 ) to the roller ( 6 ).
Method according to one of the preceding claims, characterized characterized in that the employment of the at least one cushion body during the Grinding at a constant point in the longitudinal extension the roller is done.
Method according to one of the preceding claims, characterized in that the contact point of the cushion body ( 26 . 34 ) on the roller ( 6 ) a liquid or gaseous lubricant is supplied, which through the pressure medium of the cushion body ( 34 ) and the attachment point through outlet openings ( 35 ) is fed, which is in the of the roller ( 6 ) facing outer skin of the cushion body ( 34 ) are located.
Method according to one of the preceding claims, characterized characterized in that the cushion body transverse to the roller in such a way is set that the roller bends during the grinding process and by grinding in the final state a longitudinal contour of the roller with light concave or convex curvature comes about.
Method according to one of claims 3 to 7, characterized in that the contact force of the at least one cushion body is changed during the grinding process and / or for several cushion bodies ( 39 . 40 . 41 ) is set to different values.
A method according to claim 8, characterized in that the change the hiring force in accordance with of the respective axial area of the roller in which the grinding wheel and / or the cushion body act on the roller.
External grinding device for rollers ( 6 ), in particular for carrying out the method according to claims 1 to 9, with tensioning and drive members for clamping the roller ( 6 ) at their front ends and for rotating the roller ( 6 ), with at least one at least one grinding wheel ( 13 ) driving grinding spindle ( 11 ) which in a transverse to the longitudinal axis of the roller ( 6 ) running direction, whereby the grinding wheel ( 13 ) against the roller ( 6 ) can be adjusted, with drives for mutual longitudinal displacement of the roller ( 6 ) and grinding wheel ( 13 ) and with at least one in that of the grinding wheel ( 13 ) opposite circumferential area of the roller ( 6 ) located facility ( 14 ) through which a cushion body ( 15 . 39 . 40 . 41 ) made of an elastic solid material also transversely to the longitudinal direction of the roller ( 6 ) is adjustable against their scope.
External grinding device for rollers ( 6 ), in particular for carrying out the method according to claims 1 to 9, with tensioning and drive members for clamping the roller ( 6 ) at their front ends and for rotating the roller ( 6 ), with at least one at least one grinding wheel ( 13 ) driving grinding spindle ( 11 ), which is in a transverse to the longitudinal axis of the roller ( 6 ) running direction, whereby the grinding wheel ( 13 ) against the roller ( 6 ) can be adjusted, with drives for mutual longitudinal displacement of the roller ( 6 ) and grinding wheel ( 13 ) and with at least one in that of the grinding wheel ( 13 ) opposite circumferential area of the roller ( 6 ) located facility ( 14 ) through which a cushion body ( 15 . 23 . 26 . 34 . 39 . 40 . 41 ) made of an elastic outer skin filled with an elastic pressure medium also transversely to the longitudinal direction of the roller ( 6 ) is adjustable against their scope.
Device according to claim 10 or 11, characterized by a control arrangement for adjusting the positioning force with which the cushion body ( 15 ) against the circumference of the roller to be ground ( 6 ) is employed.
Apparatus according to claim 12 with several along the roller to be ground ( 6 ) arranged upholstery bodies ( 39 . 40 . 41 ), characterized in that the contact force of each cushion body ( 39 . 40 . 41 ), individually and independently of the other upholstery bodies.
Device according to claim 12 or 13, characterized in that the device for positioning the cushion body ( 15 ) a double-acting pneumatic push cylinder ( 17 ) on the piston rod ( 19 ) the upholstered body ( 15 ) is attached.
Device according to claim 14 with several along the roller to be ground ( 6 ) arranged flexible cushion bodies ( 39 . 40 . 41 ), characterized in that each pneumatic thrust cylinder has its own pressure control valve ( 44 . 45 . 46 ) assigned.
Device according to one of claims 10 to 15, characterized in that that supply lines are provided in the area of the investment site of the upholstered body lead to the roller and through which a lubricant is supplied to the attachment point.
Apparatus according to claim 16, characterized in that as a lubricant, grinding emulsions, synthetic cooling lubricants, grinding oils or gas, in particular compressed air, are provided.
Device according to claim 16 or 17, characterized in that that the leading lubricant Feed lines through the cushion body directly to The pad's contact point on the roller are guided.
Device according to one of claims 10 to 18, characterized in that a grinding headstock ( 8th ) with two grinding spindles ( 10 . 11 ) is provided, which can optionally be brought into the active position and of which the first ( 10 ) a ceramic bonded CBN grinding wheel ( 12 ) for pre-grinding and the second a ceramic-bonded CBN grinding wheel ( 13 ) for finish grinding, and that an automatic coupling is provided through which the at least one device for positioning the upholstery body ( 15 ) to the roller to be ground ( 6 ) is activated when the second grinding spindle ( 11 ) is brought into operative position.
Device according to claim 11, characterized in that the pressure medium is a gas, preferably compressed air.
Device according to claim 18, which refers back to claim 11, characterized in that the through the cushion body ( 26 ) led through, the lubricant supply lines as hoses ( 30 ) are formed, which with the elastic outer skin of the cushion body ( 26 ) consist of one piece, whereby the lubricant and the pressure medium are separated from each other.
Device according to claim 21, characterized in that the elastic outer skin of the cushion body ( 34 ) on the roller to be ground ( 6 ) facing contact surface is provided with a plurality of outlet openings through which the pressure medium passes to the contact point to form a cooling and lubricating film.