Note: Descriptions are shown in the official language in which they were submitted.
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Abrasive segment for an abrasive roll, grinding machine and use
The present invention concerns an abrasive segment for a grinding
roller including at least one carrier body for positively lockingly fixing the
abrasive segment to a peripheral surface of the grinding roller and at least
one substantially flat abrasive layer. The present invention further concerns
a grinding roller for machining a surface of a workpiece and/or a surface of
a negative form for the production of the workpiece, wherein the grinding
roller has a substantially cylindrical main body having a peripheral surface.
The present invention further concerns a grinding machine having at least
one grinding roller according to the invention including abrasive segments
according to the invention and at least one rotary drive. The present
invention moreover concerns a use of such an abrasive segment, such a
grinding roller or such a grinding machine.
Such an abrasive segment is already known from the specification of
DE 20 2005 016 671 Ul in which the abrasive is fixed on a support means
with a hook and loop fastener strip in such a way that the abrasive layer is
oriented in normal relationship with the peripheral surface of the grinding
roller and upon contact of the abrasive segment with a workpiece the
abrasive segment is elastically deformed in one direction.
A disadvantage with the state of the art in accordance with a first
aspect is that the orientation of the abrasive layer in normal relationship
with
the peripheral surface of the grinding roller means that during rotation in
the
grinding process the removal rate is only limitedly effective as the force on
the workpiece cannot be transmitted to the workpiece in the optimum fashion
by elastic deformation of the abrasive segment.
Furthermore during the removal process the abrasive segment follows
the contour and therefore does not substantially contribute to flattening of a
surface of the workpiece.
The abrasive segment described in DE 20 2005 016 671 Ul is provided
with an elastically deformable support means, in which respect this
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preferably involves an elastically bendable material like a brush, a foam or
some other suitable material.
A disadvantage with the state of the art in accordance with a second
aspect is that the elastically bendable materials are adapted to the
deformation during the grinding process but are not designed for a grinding
fluid feed and/or grinding fluid storage.
In addition by virtue of the described support means it is only very
limitedly possible to cater for relevant properties in the removal process
like
vibration damping, acoustic insulation, thermal protection, varying surface
geometries and so forth.
Such a grinding roller is known from the specification of DE 20 2005
016 671 Ul that has mounted abrasive segments that are provided with an
abrasive layer, being oriented in normal relationship to the peripheral
surface.
A disadvantage with the state of the art is that material can be
removed only in one direction of rotation without conversion of the fixed
abrasive segments.
A grinding machine having abrasive segments is known from the
specification of DE 20 2005 016 671 Ul, in which the abrasive segments are
.. arranged in the grinding roller in such a way that the abrasive layer is
oriented in normal relationship to the peripheral surface of the grinding
roller
and thereby after fitment of the grinding roller the direction of rotation of
the
grinding roller is determined by the function of the abrasive layer.
A disadvantage there is that the orientation of the abrasive layer in
normal relationship to the peripheral surface of the grinding roller means
that
during rotation in the grinding process, by virtue of the abrasive layer being
oriented in normal relationship to the peripheral surface of the grinding
roller,
it is also not possible to generate in the direction of rotation that is
solely
possible for the grinding process an automatic advance which is preferably
necessary for large workpieces with manual machining and in addition this
does not permit a high removal rate.
The technical object according to the first aspect of the present
invention is therefore to provide an abrasive segment which is improved over
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the state of the art and in which the disadvantages of the state of the art
are
at least partially overcome and which is distinguished in particular by an
abrasive layer which permits an increased material removal and the material
removal by the abrasive segment also contributes to significant flattening of
the workpiece surface.
The technical object of the second aspect is to provide an abrasive
segment which ensures an effective grinding fluid feed and grinding fluid
storage and which is matched to parameters relevant for the removal process
like vibration, sound, heat, surface shape and so forth, wherein it is not
necessary to dispense with convenient handling and/or a long service life and
the grinding result is improved.
A further object according to a third aspect of the present invention is
to provide a grinding roller which is improved over the state of the art and
in
which the disadvantages of the state of the art are at least partially
overcome
and which is distinguished in particular in that the grinding roller can be
used
in both directions of rotation that are relevant for the removal process.
A further object according to a fourth aspect of the present invention
is to provide a grinding machine which is improved over the state of the art
and in which the disadvantages of the state of the art are at least partially
overcome and which is distinguished both by user-friendly handling in
relation to large grinding rollers (from a roller length and/or a roller
diameter
of around 300 mm) and also by a high level of possible removal on the
workpiece.
A further object according to a fifth aspect of the present invention is
to provide a use of the abrasive segment, the grinding roller or the grinding
machine, that is improved over the state of the art.
The object according to the first aspect is attained by the features of
claim 1.
Accordingly it is provided according to the invention that the at least
one abrasive layer in a state of the abrasive segment of being fixed to the
grinding roller is oriented substantially parallel to the peripheral surface
of
the grinding roller and at least one elastic intermediate layer is arranged
between the at least one carrier body and the at least one abrasive layer.
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By virtue thereof it is possible for the first time for the contact and
thus also the transmission of force between the abrasive layer and the
workpiece surface to be effected substantially normal to the peripheral
surface of the grinding roller, wherein an increased removal rate on the
workpiece (for example a negative form and the form parts thereof) is
guaranteed as the abrasive segment can apply more pressure to the surface.
Furthermore the parallel orientation of the abrasive layer with respect
to the peripheral surface ensures efficient leveling of the surface to be
machined, wherein in particular residues are effectively dealt with and the
surface is locally corrected to the factors in the surrounding area and
flattened.
In particular after repair operations in negative forms by virtue of
compensating materials unevenness and residues remain to an increased
extent, and they can be effectively removed by that abrasive segment.
The term elastic (synonymous with compressible while retaining
shape) means that the intermediate layer is compressible under the influence
of a force and when a force is no longer applied the intermediate layer
returns
to its original shape again. That property achieves substantially two
advantages, namely that the layer has a pressure-compensating effect and
it deploys a damping action in the grinding process.
The object according to the second aspect is attained by the features
of claim 2.
It is accordingly provided that arranged between the at least one
carrier body and the at least one abrasive layer is at least one elastic
intermediate layer which substantially comprises felt.
That makes it possible for the first time that, by virtue of the sponge-
like nature, a structure in respect of the elastic intermediate layer can be
afforded, which is suitable both for receiving and storing fluid and also
delivering fluid in the optimum fashion for the removal process.
The elastic intermediate layer which substantially comprises felt
means that the abrasive segment can be operated both in a dry grinding
procedure and also using grinding fluid.
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In addition the elastic properties of felt have a high compression
elasticity and resilience whereby creases and wrinkles scarcely occur, which
would be detrimental for the grinding process.
In addition felt is sound-insulating and provides efficient insulation in
respect of heat, wherein those properties, in particular in use of the
abrasive
segment, provide both for more convenience in operation and also afford a
better grinding result. In addition the cushioning afforded ensures protection
from an excessively high mechanical loading on all the components involved
like the abrasive layer, carrier body and/or workpiece.
Adaptation of the properties of the felt to the individual requirement
of the surface to be machined can also be controlled by way of the density
of the basic felt layer.
Added to that there is the positive property that even regions which
are curved to differing degrees and/or regions of differing thickness can be
simultaneously machined by virtue of the material-specific properties of felt
without having in advance to influence the form of the curved regions and/or
regions of differing thickness in regard to the configuration of the abrasive
segment and without having to suffer a loss in removal rate. As a result the
removal procedure also acts in particular in producing leveling of the
surface.
Furthermore the abrasive segment with the elastic intermediate layer
comprising felt affords the option of additionally dealing with special and
challenging curved regions like for example convex or concave geometries
without major cost or resources involvement insofar as the elastic
intermediate layer of felt follows the curvature of the workpiece to be
machined. The thickness of the elastic intermediate layer of felt can
additionally vary in a thickness over at least a length of the abrasive
segment.
The use of felt as the supporting elastic intermediate layer therefore
affords the advantage that both the necessary pressure for effective removal
of material is transmitted from the carrier element to the workpiece by way
of the abrasive layer and also it is possible to pursue complex surfaces in
contour.
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The vibration-insulating property of felt which can be adapted to the
factors involved in the removal process by means of the specific composition
permits user-friendly and convenient operation of the abrasive segment
which due to the low specific density does not involve any substantial
additional weight in terms of handling.
Added to this there is the positive property that the abrasive segment
is exposed to less elastic deformation, and that results in an increase in
service life or minimization of the wear phenomena. It is thus possible to
dispense with frequently changing the felt layer and also the carrier body.
The object according to the third aspect is attained by the features of
claim 9.
It is accordingly provided according to the invention that at least one
such abrasive segment is positively lockingly fixed to the peripheral surface.
By virtue of that it is possible for the first time that the material-
specific properties, that are conducive to the grinding process, of the
elastic
intermediate layer which is formed in particular from felt and can therefore
ensure damping, sound insulation, pressure equalization, heat protection,
fluid reception/storage/delivery and deformability can be utilized to the
optimum extent in both directions of rotation.
The object according to the fourth aspect is attained by the features
of claim 14.
Accordingly it is provided in accordance with the invention that the at
least one grinding roller can be set in rotation with the at least one rotary
drive in order to cause a relative movement of the at least one abrasive layer
relative to the surface of the workpiece to be machined and/or the negative
form.
As a result it is possible for the first time that the abrasive layer is
oriented substantially parallel to the peripheral surface of the grinding
roller
and both directions of rotation are provided with an automatic advance
during the grinding process. That permits simple operation of grinding rollers
with a length extent of up to 800 mm.
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The abrasive segments moreover, due to the elastic intermediate
layer, ensure large-area contact and effective removal by the abrasive layer
over the entire longitudinal extent of the grinding roller.
Advantageous embodiments of the invention are defined in the
appendant claims.
According to an advantageous configuration of the invention it is
provided that the at least one elastic intermediate layer is such that a
grinding fluid, in particular water, can be stored and delivered therein,
and/or
is of an abrasive-free configuration.
That provides a particularly advantageous cooperation of the initially
abrasive-free workpiece surface and the abrasive layer in a wet grinding
process, more specifically such that a grinding fluid stored in the elastic
intermediate layer can issue during the removal process and grinding dust
which is formed when grinding on the abrasive layer can be efficiently flushed
away.
In addition the abrasive prevents increased heat generation and thus
carefully treats both the abrasive layer and also the surface of the workpiece
and/or the negative form.
In the case of workpieces and/or negative forms in which no grinding
fluid is required in the removal process it is possible to eliminate
additional
cleaning operations for the user of the abrasive segment by virtue of the
abrasive-free elastic intermediate layer.
Advantageously it is provided that the at least one carrier body is
substantially T-shaped in cross-section and/or is of such a configuration that
the carrier body can be positively lockingly fixed to the peripheral surface
of
the grinding roller by way of a dovetail connection.
That permits a positively locking connection of the segment to a
corresponding groove on a roller, in which the forces acting during the
removal process are transmitted to a high degree to the more massive main
body of the grinding roller by way of the carrier body.
The use of a dovetail connection affords the positively locking
connection to a higher degree as fixing is effected not only in a direction
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transversely to the dovetail connection but also in a perpendicular direction
relative to the groove.
It is preferably provided in the longitudinal direction of the groove that
the abrasive segment is fixed on the grinding roller by a constructive
termination.
It has proven to be advantageous if the at least one carrier body
includes at least one contact surface at which the at least one elastic
intermediate layer is at least region-wise supported, preferably wherein the
at least one contact surface is oriented substantially parallel to the at
least
one flat abrasive layer.
As the parallel orientation both of the abrasive layer and also the
carrier body on the peripheral surface of the grinding roller is guaranteed by
that arrangement the forces which are required for the removal process and
occur during the removal process act to a high degree in the radial direction
.. of the grinding roller. That is advantageous for an effective and careful
removal process.
According to an advantageous embodiment of the invention it is
provided that the at least one elastic intermediate layer is fixed with an
adhesive layer to the at least one carrier body and/or to the at least one
abrasive layer.
The adhesive layer as a bonding agent is on the one hand cost-
effective and is adequate in function for demanding removal processes.
After the end of the service life of the carrier body, the elastic
intermediate layer or the abrasive layer the worn parts can be quickly
changed by the adhesive layer without requiring a large amount of material.
It has proven to be advantageous if the at least one elastic
intermediate layer is of a thickness, the thickness being at least three times
as great as a layer thickness of the at least one abrasive layer.
Particularly preferably the abrasive layer is of a layer thickness in the
range of between 0.6 mm and 1.5 mm.
Preferably the elastic intermediate layer is of a thickness in the range
of between 5 mm and 12 mm, particularly preferably in the range between
8 mm and 10 mm.
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That prevents contact occurring between the carrier bodies and the
surface of the workpiece or the negative form when there are more severe
surface unevennesses of the workpiece or the negative form.
In addition the elastic intermediate layer deploys the full extent of its
positive material-specific aspects for the removal process, only as from a
certain thickness.
An advantageous variant for the machining of surfaces of a workpiece
or a negative form comprising composite material provides that the at least
one abrasive layer includes at least one abrasive, preferably diamond, cubic
boron nitride, sintered corundum and/or an abrasive with zirconium
corundum, aluminum oxide and/or silicon carbide, preferably wherein the at
least one abrasive is of an abrasive grain size between 50 1.1m and 745 1.1m
and/or is embedded in at least one bonding agent, preferably a resin bonding
agent, preferably wherein the abrasive layer is arranged on a carrier layer.
It is particularly preferred if the peripheral surface is provided with at
least one groove for receiving at least one abrasive segment, preferably
wherein the at least one groove is of a substantially dovetail-shaped
configuration and the at least one abrasive segment is positively lockingly
fixed therein.
In an embodiment it is provided that the at least one groove is
arranged inclinedly relative to a longitudinal direction of the grinding
roller,
preferably at an angle between 10 and 100, particularly preferably at an angle
between 2 and 3.5 .
That ensures a particularly harmonic grinding process as both upon a
first contact of the grinding roller with the workpiece and also during the
grinding process preferential transmission of force of the at least one
abrasive segment to the workpiece is effected and lower impact forces are
generated.
In addition the angle of the at least one groove makes it possible that
in a final phase of the grinding contact of a first abrasive segment a
subsequent abrasive segment already comes into contact with the workpiece
and that thereby affords a reduction in the times in which the workpiece is
not in contact with the at least one grinding segment.
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Therefore the grinding result is improved by an inclined positioning of
the at least one groove relative to the longitudinal direction of the grinding
roller and the abrasive segments therein.
As the carrier bodies of the abrasive segments are of a substantially
T-shaped configuration the at least one corresponding groove affords a force-
locking connection for the abrasive segments at the peripheral surface of the
grinding roller. A dovetail-shaped connection in that respect affords a secure
and force-locking connection of the abrasive segment to the grinding roller
in particular under high levels of stress in the removal process.
An embodiment of the invention provides that arranged at at least one
end of the substantially cylindrical main body is at least one preferably
substantially cylindrical opening for at least one tool receiving means,
preferably wherein precisely two openings are arranged at the at least one
end.
That achieves the effect that the grinding roller can be used as a tool
for the most widely varying grinding machines or grinding robots.
This further permits a rapid change of grinding roller, grinding machine
or grinding robot.
That is a relevant factor, in particular for reasons of time and cost, in
the machining of large surfaces of the workpieces and/or negative forms.
Arranging the openings at the end makes it possible for the abrasive
segments to be able to extend over the full lateral extent of the grinding
roller.
If precisely two openings are arranged at the end that takes account
of commercially usual tool receiving means.
In addition the force arm between the opening and the center point of
the end makes it possible for tangentially acting forces in the removal
process, caused by the rotation of the grinding roller and the relative
movement between the abrasive segment and the surface, to be transmitted
by way of the tool receiving means to the grinding machine or grinding robot
and compensated, to a higher degree.
According to a preferred embodiment of the invention it is provided
that at least one locking mechanism, at least one cover and at least one
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opening, wherein the opening is arranged in the at least one cover and the
at least one locking mechanism can be introduced into the at least one
opening, for arresting the at least one abrasive segment are arranged at at
least one of the ends of the substantially cylindrical main body.
That ensures a more effective positively locking and force-locking
relationship between the abrasive segment and the grinding roller.
In addition the arrangement at the end of the main body means that
the arresting effect can already be effected in a user-friendly fashion after
fitment has been effected to a grinding roller or a grinding robot.
Alternatively it is possible to provide at least one handle, preferably
having at least one grinding fluid feed means, for manual guidance of the
grinding machine.
The handle ensures convenient handling even for large heavy grinding
rollers.
The abrasive layer is supplied with grinding fluid by means of the
grinding fluid feed means, without a grinding fluid feed that has to be
externally operated. That saves on unnecessary working steps in the
removal process and also affords more convenient handling with the grinding
machine or the grinding robot.
It is further preferably provided that there is provided at least one
robot arm, arranged at the end of which is at least one tool receiving means
of at least one grinding roller, preferably wherein the tool receiving means
is
provided with at least one grinding fluid feed means.
That makes it possible for the grinding roller to be used even on
surfaces which are difficult to access of the workpiece or the negative form
while in addition the abrasive layer is supplied with grinding fluid.
The object according to the fifth aspect is attained by the features of
claim 16.
According to the invention there is provided the use of an above-
described abrasive segment and/or an above-described grinding roller for
machining a surface of a workpiece, that is preferably provided with a coating
for protection from environmental influences, wherein it is preferably
provided that at least one region of the workpiece, that adjoins the surface
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to be machined, comprises a carbon fiber and/or glass fiber composite
material or a surface that is preferably coated with wax of a negative form
for the production of a workpiece which preferably at least region-wise
comprises a carbon fiber and/or glass fiber composite material.
The uses referred to are effected in a particularly advantageous form
for application to the workpiece which is in the form of an airfoil or
fuselage
of an aircraft, parts of ship, parts of a train or in the form of a rotor
blade of
a wind turbine.
The uses referred to are effected in a further particularly advantageous
form with the feed of a grinding fluid, preferably water, particularly
preferably water mixed with soap.
Further details and advantages of the present invention are described
more fully hereinafter by means of the specific description with reference to
the embodiments by way of example illustrated in the drawings in which:
Figure la shows an exploded view of an abrasive segment in its
individual components according to a first preferred embodiment as a
perspective view with a detail view of an abrasive layer,
Figure lb shows an abrasive segment in its entirety according to a
second preferred embodiment as a perspective view with a detail view of an
elastic intermediate layer of felt,
Figure 2 shows a grinding roller in its entirety as a perspective view
according to a preferred embodiment with fitted abrasive segments in
accordance with the embodiment shown in Figure la or Figure lb,
Figure 3a shows a grinding machine according to a first preferred
embodiment in the form of a manually operable grinding machine with a
fitted grinding roller in accordance with the embodiment shown in Figure 2
and included abrasive segments according to the embodiment shown in
Figure la or Figure lb as a side view,
Figure 3b shows the grinding machine according to a second preferred
embodiment in the form of a robot-controlled grinding machine having a
fitted grinding roller according to the embodiment shown in Figure 2 and
included abrasive segments according to the embodiment shown in Figure
la or Figure lb as a side view,
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Figure 4a shows the use of a grinding roller according to the
embodiment shown in Figure 2 with fitted abrasive segments according to
the embodiment shown in Figure la or Figure lb during the removal process
on a workpiece as a side view,
Figure 4b shows the use of a grinding roller according to the
embodiment shown in Figure 2 with fitted abrasive segments according to
the embodiment shown in Figure la or Figure lb during the removal process
on a negative form as a side view, and
Figure 5 shows a grinding roller according to a further preferred
.. embodiment without abrasive segments as a view in a radial direction.
Figure la shows an abrasive segment 1 including a carrier body 3 and
a flat abrasive layer 6, an elastic intermediate layer 7 being arranged
between the abrasive layer 6 and the carrier body 3. For the sake of ease of
viewing the drawing those components are separate in the view, but the
components are connected together by the formation of the abrasive
segment.
The carrier body 3 is T-shaped, wherein the T-shape includes a
dovetail-shaped limb intended for a dovetail connection (see Figure 2) to
provide the positively locking connection. The carrier body 3 in itself can be
of any length. Lengths are preferred however which are suitable for the
removal process of extensive surface geometries.
The elastic intermediate layer 7 is of a cuboidal configuration. It can
however also differ from that shape and/or can be adapted to specific surface
geometries to be treated. By way of example the elastic intermediate layer
7 can be of a trapezoidal configuration.
The abrasive layer 6 is of a thickness 16, wherein the abrasive layer 6
includes an abrasive 17, preferably diamond 18, cubic boron nitride 19,
sintered corundum 52 and/or an abrasive 17 with zirconium corundum 20,
aluminum oxide 21 and/or silicon carbide 22.
The precise composition of the abrasive 17 and the abrasive grain size
18 however can be any desired composition. Particularly preferably the one
abrasive 17 is of an abrasive grain size 18 of between 50 1.1m and 745 lam.
The abrasive 17 is held together by a bonding agent 23. Particularly
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preferably the abrasive 17 is embedded in a resin bonding agent 24 but can
also be embedded in another material as the bonding agent 23.
The abrasive layer 6 is arranged on a carrier layer 49. The carrier
layer 49 can in itself be of any desired material and is also not absolutely
necessary. The abrasive layer 6 can also be applied directly to the elastic
intermediate layer 7. A carrier layer 49 of textile is however particularly
preferred.
The elastic intermediate layer 7 is fixed with an adhesive layer 14 to
the carrier body 3 and/or to the abrasive layer 6. The adhesive layer 14 in
that case can be applied over the entire surface area or only region-wise.
The elastic intermediate layer 7 is of a thickness 15, the thickness 15
being a multiple larger than a layer thickness 16 of the abrasive layer 6.
Particularly preferably the thickness 15 is at least three times the layer
thickness of the abrasive layer 6.
The abrasive layer 6 is applied to the carrier layer 49. The abrasive
layer 6 can be applied to the carrier layer 49 over the entire surface area or
only region-wise.
Figure lb shows an abrasive segment 1 with an elastic intermediate
layer 7 comprising felt 8.
The carrier body 3 includes a contact surface 13 at which the elastic
intermediate layer 7 is at least region-wise supported. The contact surface
13 is oriented parallel to the flat abrasive layer 6.
The elastic intermediate layer 7 is of such a configuration that a
grinding fluid, in particular water 10, can be stored therein and can be
delivered, and/or it is of an abrasive-free nature.
The elastic intermediate layer 7, the contact surface 13 and the
abrasive layer 6 are oriented substantially parallel and are at an angle of
substantially 900 relative to a radial direction of a grinding roller 2 (not
shown
for the sake of clarity).
The grinding fluid 9 can be of any desired composition. Particularly
preferably a water 10 mixed with soap 48 is present in the grinding fluid 9.
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The grinding fluid 9 is stored in the fibers 50 of the felt 8 and
penetrates between the fibers 50 of the felt 8 upon delivery of the grinding
fluid 9 to the abrasive layer 6.
In general the elastic intermediate layer 7 can also be in the form of
foams or plastics. In that case the thicknesses of the individual components
of the abrasive segment 1 can be different.
Figure 2 shows a grinding roller 2 with a cylindrical main body 28
having a peripheral surface 5. Abrasive segments 1 are fixed in positively
locking relationship on the peripheral surface 5.
The peripheral surface 5 is provided with grooves 29 for receiving
abrasive segments 1. In this design the grooves 29 are of a dovetail-shaped
configuration. The abrasive segments 1 are positively lockingly fixed in the
grooves 29.
A cover 53 is arranged at an end 30 of the cylindrical main body 28
and has two openings 54. Two locking mechanisms 33 engage into those
two openings in order to fix the plurality of abrasive segments 1 in an axial
direction.
Two cylindrical openings 31 for a tool receiving means 32 are arranged
at an end 30 of the cylindrcial main body 28. The cylindrical openings 31
can be arranged at one or at both ends 30 of the grinding roller 2.
The cylindrical openings 31 in themselves can be present in any
desired number. A particularly preferred embodiment is that in which the
end 30 includes two eccentric cylindrical openings 31.
A locking mechanism 33 is arranged at one of the ends 30 of the
cylindrical main body 28 for arresting the abrasive segments 1.
The abrasive segments 1 are arranged radially outwardly on the
peripheral surface 5. The abrasive segments can be spaced at any desired
spacing as indicated at 51. An equidistant arrangement of the abrasive
segments 1 is particularly preferred. The spacing 51 between the abrasive
segments 1 should not be selected to be so large that the result of the
removal process is adversely affected.
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The grinding roller 2 can be of a roller diameter in the range of
between 80 mm and 400 mm. The grinding roller 2 can be of a roller length
in the range of between 50 mm and 800 mm.
Figure 3a shows a grinding machine 34 having a grinding roller and a
rotary drive 35 with which the one grinding roller 2 can be set in rotation in
order to produce a relative movement 36 of the one abrasive layer 6 relative
to the surface 25 to be machined on the workpiece 26 and/or the negative
form 27.
There is a handle 35 for manual guidance of the grinding machine 34.
The handle 35 is provided with a grinding fluid feed means 36, wherein the
grinding fluid feed means 36 is fixed on and/or in the handle 35 in such a
way that the operator is not impeded in handling the grinding machine 34.
The handle 35 can be designed for one-arm or two-arm operation.
Figure 3b shows a robot arm 37, at the end 38 of which there is
provided a tool receiving means 32 of a grinding roller 2.
The tool receiving means 32 is provided with a grinding fluid feed
means 36. In a further embodiment however that can also be mounted to
the robot arm 37 or another component of the grinding machine 34. If no
grinding fluid feed means 36 is needed for the removal process it can also be
entirely eliminated.
The grinding fluid 9 is passed further to the grinding roller 2 by way of
the grinding fluid feed means 36.
Figure 4a shows the use of abrasive segments 1, a grinding roller 2 or
a grinding machine 34 for machining a surface 25 of a workpiece 26, that is
coated with a coating 39 to give protection from environmental influences.
The workpiece 26 can in itself be of any nature. Use of the abrasive
segments 1, grinding roller 2 or the grinding machine 3 for the abrasive
procedure on airfoils or fuselages 44 of an aircraft, rotor blades 45 of a
wind
turbine, parts of a ship or parts of a train is however particularly
preferred.
The workpiece 26 however can also be formed from other extensive
geometries 46 comprising composite materials 47.
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A region 40 of the workpiece 26, that adjoins the surface 25 to be
machined, at least partially comprises a carbon fiber composite material 41
and/or a glass fiber composite material 42.
Figure 4b shows a surface 25, coated with wax 43, of a negative form
27 for the production of a workpiece 26 (shown in Figure 4a).
The use is effected with the feed of a grinding fluid 9. It is optionally
also possible however to dispense with the feed of the grinding fluid 9.
Figure 5 shows a grinding roller 2 before being fitted with abrasive
segments 1.
The grooves 29 in which the abrasive segments 1 are fixed in positively
locking relationship are at an angle in the range of between 10 and 100,
particularly preferably between 2 and 3.5 , relative to a longitudinal
direction of the grinding roller 2, but can also be arranged parallel to the
longitudinal direction of the grinding roller 2.
The longitudinal direction of the grinding roller 2 is defined by the axial
direction (axis of rotation) of the grinding roller 2 and is thus normal to
the
direction of rotation or a radial direction of the grinding roller 2.
Two locking mechanisms 33 can be seen at the end 30 at the left. The
grooves 29 are continuous as far as that facing side and terminate before an
opposite side in order to permit a positively locking connection of the
abrasive segments 1 (not shown for the sake of clarity) in the grinding roller
2 by a termination of the grooves 29.
In order to fix the abrasive segments 1 to the grinding roller 2 the
cover 53 over the openings 54 is released by the locking mechanism 33 (for
example by rotation). That removal has already occurred in Figure 5.
Then the abrasive segments 1 are introduced into the grooves 29 as
far as the end thereof in order subsequently to again fix the cover 53 on the
grinding roller 2 and to secure the abrasive segments 1 in the longitudinal
direction.
It is however also possible in accordance with the invention to use two
covers 53 for fixing the abrasive segments 1 and to dispense with the
termination configuration of the grooves 29.
17
Date Recue/Date Received 2022-01-05
