U.S. patent application number 13/263183 was filed with the patent office on 2012-05-10 for guide roller for wires.
This patent application is currently assigned to XPERION GmbH. Invention is credited to Thomas Henss, Marcus Schwarz.
Application Number | 20120111913 13/263183 |
Document ID | / |
Family ID | 42646251 |
Filed Date | 2012-05-10 |
United States Patent
Application |
20120111913 |
Kind Code |
A1 |
Henss; Thomas ; et
al. |
May 10, 2012 |
GUIDE ROLLER FOR WIRES
Abstract
A guide roller for wires, comprising a coating support (1) in
the form of a hollow cylinder which is slidable parallel to the
longitudinal direction, on which a coating (4) is fixed permanently
by adhesion, and having guide grooves for the wires, and which is
supported on a hub part by a stabilising support (2) made from CFP
or metal, wherein the coating support (1) is made of CFP and is
secured on the stabilising support (2) only by a cylindrical or
conical press-fitting, avoiding the use of a screw connection
Inventors: |
Henss; Thomas; (Rimbach,
DE) ; Schwarz; Marcus; (Heppenberg/Oberlaudenbach,
DE) |
Assignee: |
XPERION GmbH
Herford
DE
|
Family ID: |
42646251 |
Appl. No.: |
13/263183 |
Filed: |
April 1, 2010 |
PCT Filed: |
April 1, 2010 |
PCT NO: |
PCT/DE2010/000382 |
371 Date: |
December 23, 2011 |
Current U.S.
Class: |
226/196.1 |
Current CPC
Class: |
D01H 5/74 20130101; B23D
57/0053 20130101; B28D 5/045 20130101 |
Class at
Publication: |
226/196.1 |
International
Class: |
B65H 57/06 20060101
B65H057/06 |
Foreign Application Data
Date |
Code |
Application Number |
Apr 6, 2009 |
DE |
102009016545.2 |
Claims
1. A guide roller for wires, comprising: a coating support in the
form of a hollow cylinder which is slidable parallel to the
longitudinal direction, on which a coating is fixed permanently by
adhesion, and having guide grooves for the wires, and which is
supported on a hub part by a stabilising support made from CFP or
metal, wherein the coating support is made of CFP and is secured on
the stabilising support only by one of a cylindrical and conical
press-fitting, avoiding the use of a screw connection.
2. The guide roller for wires as recited in claim 1, wherein the
coating support and the stabilising support consist of fibre
strands stuck together with synthetic resin, which are arranged in
multiple plies one on top of the other and are aligned at an angle
of +/-30 to 60.degree. relative to the longitudinal axis of the
hollow cylinder, wherein the successive fibre strands in the radial
direction intersect each other in the opposite direction.
3. The guide roller for wires as recited in claim 1, wherein the
coating support and the stabilising support consist of fibre
strands stuck together with synthetic resin, which are arranged in
multiple plies one on top of the other and are aligned at an angle
of +/-40 to 50.degree. relative to the longitudinal axis of the
hollow cylinder, wherein the successive fibre strands in the radial
direction intersect each other in the opposite direction.
4. The guide roller for wires as recited in claim 2, wherein the
coating support and/or the stabilising support comprise at least
one ply that consists of fibre strands stuck together with
synthetic resin and extends essentially in the circumferential
direction.
5. The guide roller for wires as recited in claim 1, wherein the
stabilising support and the coating support have constructions that
differ from one another, providing that the radial layer thickness
of the stabilising support is at least three times greater than
that of the coating support.
6. The guide roller for wires as recited in claim 1, wherein the
stabilising support and the coating support have constructions that
are the same as one another, providing that the radial layer
thickness of the stabilising support is at least five times greater
than that of the coating support.
7. The guide roller for wires as recited in claim 1, wherein the
coating support has a wall thickness equal to 0.5 to 8% of the
associated outer diameter.
8. The guide roller for wires as recited in claim 1, wherein the
coating support has a wall thickness equal to 1 to 3% of the
associated outer diameter.
9. The guide roller for wires as recited in claim 1, wherein the
hub part is in contact with the stabilising support at least
radially from the inside at least in the area of the frontal face
ends thereof via radial flanges.
10. The guide roller for wires as recited in claim 1, wherein each
of the frontal face flanges of the hub part is furnished with a
collar protruding radially outwards and that the collars cover the
frontal face of the stabilising support.
11. The guide roller for wires as recited in claim 10, wherein the
collars are delimited on the outside by circumferential surfaces
that progressively and continuously complete the circumferential
surface of the stabilising support in the manner of a notional
extension.
12. The guide roller for wires as recited in claim 1, wherein the
stabilising support is supported between the frontal face flanges
by at least one additional flange of the hub part.
13. The guide roller for wires as recited in claim 1, wherein the
flanges of the hub part and the stabilising support are stuck
together with synthetic resin or welded together.
14. The guide roller for wires as recited in claim 1, wherein the
stabilising support is delimited on the outside by a cylindrical
surface that is calibrated by a grinding process.
15. The guide roller for wires as recited in claim 1, wherein the
coating support is delimited on the outside by a cylindrical
surface that is calibrated by a grinding process.
16. The guide roller for wires as recited in claim 15, wherein the
cylindrical surface is provided with a relief-type profile by a
grinding process and/or by a peel ply.
17. The guide roller for wires as recited in claim 1, wherein the
coating support with the fixed coating securely attached thereto
and the guide grooves for wires incorporated therein is intended
for one-time use only.
Description
[0001] The invention relates to a guide roller for wires comprising
a coating support in the form of a hollow cylinder which is
slidable in the longitudinal direction and is supported on a hub
part by a cylindrical stabilising support made from carbon
fibre-reinforced plastic (CFP) or metal.
BACKGROUND OF THE INVENTION
[0002] A guide roller for wires of such kind is known from DE 197
17 379 A1. In this case the coating support is made from invar
steel and is fixed by shrink fitting on a stabilising support made
from a material with a substantial coefficient of linear expansion.
In order to slide the coating support on to or off of the
stabilising support, at least the stabilising support must
therefore be cooled to a correspondingly substantial degree,
necessitating significant technical effort. Furthermore, the
document describes a construction in which the coating support and
the stabilising support are screwed together. Here too, mounting
and removing the coating support is associated with relatively
intensive effort. Moreover, it is difficult to obtain good radial
run-out with this device.
BRIEF DESCRIPTION OF THE INVENTION
[0003] The object of the invention is to suggest a guide roller for
wires that is easy to manufacture, in which the coating support is
easy to mount and remove, and which has good radial run-out.
Subsequently, it must also be easy to mount and remove while
retaining good tolerances in terms of shape and position.
[0004] This object is solved according to the invention with the
characterizing features recited in claim 1. The subordinate claims
refer to advantageous embodiments thereof.
[0005] In the guide roll for wires according to the invention, it
is provided that the coating support is made from CFP and is
attached to the stabilising support via a press fitting, without
the use of a threaded connection. Since the stabilising support is
functionally decoupled from the coating support, coating may be
carried out without the need to approach the coating site with the
stabilising support. The coating support is mounted on the
stabilising support in directly usable condition in the manner of a
module and may then be put into operation immediately.
[0006] The stabilising support may be of very rigid construction
and may be made from either CFP or metal. Together with the hub
part, it has excellent strength and dimensional stability.
[0007] The coating support may be mounted axially onto the
stabilising support and removed therefrom very easily using a press
at normal temperature. It is not necessary to create a temperature
difference between the parts that are to be connected. Even so, the
requisite turning moments can be transferred from the stabilising
support to the coating support without difficulty, and excellent
radial run-out is assured from the outset and under all operating
conditions.
[0008] Since the coating support is made from CFP, it is possible
to create extremely precise fits, definable in advance, in the area
of the cylindrically shaped mutual contact surfaces of the two
parts. This not only makes storage easier, it also provides the
additional capability to produce pre-coated and pre-assembled
coating supports as parts for one-time use and transport them to
the site where they are to be used.
[0009] The coating supports and the stabilising supports are in
contact with one another via cylindrical surfaces. In such a
construction, the coating support may be mounted on and removed
from the stabilising support in either of the two possible
directions.
[0010] The coating support and the stabilising support may be in
contact with one another via conical surfaces. In the case of a
construction of this kind, mounting and removal can only take place
in one, predefined direction. However, the advantage of this
arrangement is that the inner surface of the coating support is
subject to less wear during mounting and removal. The conical
surfaces should be at an angle between 0.001 and 5.degree.,
preferably an angle between 0.002 and 0.05.degree., relative to the
longitudinal axis.
[0011] The coating may consist of a polymer or ceramic material.
The material used for preference is elastomeric polyurethane that
has been applied to the coating support in a casting process and is
furnished with the necessary channels for guiding the wires
according to its intended application. The materials used must
always demonstrate the necessary chemical, thermal and mechanical
resistance during its intended use, and in particular good
resistance to the effects of glycol.
[0012] In the embodiment according to claim 2, it is provided that
the coating support is made from fibre stands stuck together with
synthetic resin and arranged one on top of the other in multiple
plies, and aligned at an angle of +/-30 to 60.degree. relative to
the longitudinal axis of the hollow cylinder, the fibre strands in
the consecutive layers in the radial direction intersecting with
one another in the opposite direction. In this way, the stiffness
and stability necessary for mounting and removal is assured in both
the circumferential and the longitudinal directions, and the coated
coating support may be used equally well regardless of its mounting
direction. The Poisson's ratio resulting from this also makes it
easier to mount the coating support.
[0013] The coating support is preferably made from fibre strands
that are stuck together with synthetic resin, arranged one on top
of the other in multiple plies and aligned at an angle of +/-40 to
50.degree. relative to the longitudinal axis of the hollow
cylinder, the fibre strands in the consecutive layers in the radial
direction intersecting with one another in the opposite
direction.
[0014] In addition, the coating support may also contain at least
one layer in which the fibre strands are arranged at an angle of 80
to 90.degree. relative to the longitudinal axis of the hollow
cylinder. The peripheral layer formed thereby lends the coating
support particularly good stiffness and stability in the
circumferential direction, which is beneficial for enabling the
transfer of high turning moments from the stabilising support to
the coating support. In addition, dimensional stability is
supported, which helps substantially to ensure good positional
precision of the grooving arrangement.
[0015] If both the stabilising support and the coating support are
made from CFP, they may have constructions differing from each
other reflecting their different technical functions. In this
context, the overall radial thickness of the stabilising support is
at least three times greater than that of the coating support. The
overall thickness of the stabilising support is preferably at least
five times greater than that of the coating support. The differing
overall thicknesses reflect the fact that the stabilising support
is dimensioned primarily from the point of view of the bending load
it has to withstand, and the coating support is primarily
dimensioned to satisfy the requirements of the press-fit seating.
The stabilising support and the coating support are able to
complement one another particularly well after mounting through the
properties these constructions lend to them.
[0016] If the stabilising support is made from metal, particularly
steel, the wall thickness is also considerably greater than that of
the coating support.
[0017] Without the coating, the coating support advantageously has
a wall thickness that is between 0.5 and 8% of its outer diameter,
preferably between 1 and 3% of its outer diameter. Within the
indicated ranges, a lightweight coating support may be produced,
coated and treated easily and with low production costs. Thus it is
also possible to convert existing guide rollers of conventional
construction for the purposes of the invention and to equip them
with a coating support that is intended for single use only, and is
furnished with the pre-grooved coating for wires that is specified
therefor and affixed by adhesion. In this case, used coating
supports that have become worn no longer need to be returned for
re-application of a coating and grooving.
[0018] The flanges on the frontal surface may either be in flush
contact only with the radial inner side of the stabilising support
or they may be provided with a circumferential collar that covers
the frontal surfaces of the stabilising support. The collars should
have the same outer diameter as the stabilising support. This makes
it easier to mount the tubular coating support on the stabilising
support repeatedly without causing mechanical damage to the frontal
ends of the stabilising support. In particular, this prevents the
fibre or plastic components from becoming detached from the CFP
material and being carried into a gap that is formed between the
coating support and the stabilising support.
[0019] The stabilising support may be braced radially between the
flanges on the frontal surfaces by at least one further flange.
This prevents oval deformations from occurring under one-sided
loads.
[0020] The flanges and the stabilising support are advantageously
also affixed by adhesion with synthetic resin, and are thus
attached to each other immovably. If the stabilising support is
made from metal, it is practical to weld the parts together
similarly.
[0021] The stabilising support is advantageously delimited by a
surface that has been calibrated with rotational symmetry on the
outside in a grinding process and has a slightly conical or
cylindrical shape. This helps to achieve a press fitting that is
sufficiently tight but still detachable.
[0022] The inner cylindrical surface of the coating support is
calibrated extremely precisely anyway, due to the manufacturing
process. Production is effected in a winding process, in which the
fibre strands, soaked in synthetic resin are wound onto a conical
or cylindrical mould core and are fixed permanently by the
subsequent solidification and curing of the synthetic resin.
[0023] The coating support may be delimited on the outside by a
cylindrical surface that has advantageously been calibrated with a
"peel ply" in the winding process, and has been also been roughened
in the same process. Such a cylinder surface is produced in a final
process step by winding a polyamide tissue without synthetic resin
or a similar material onto the as yet non-rigid, final winding ply
of resin-soaked CFP and forcing it into the last winding ply by
prestressing. This also forces the excess synthetic resin radially
outwards through the mesh of the fabric, so that a fabric-like
surface structure is obtained on the outside of the coating
support, which remains as the CFP mantle cures, and when the fabric
is removed by peeling leaves a good adhesion base for the coating
that is applied, subsequently.
[0024] The outermost ply of the coating support may be calibrated
and roughed as well or additionally thereto in a grinding process
after curing. This makes is possible to apply an extremely
precisely dimensioned coating of elastomeric polyurethane to the
coating support and to embed the coating in the roughened surface
of the coating support particularly firmly. The coating may be
applied in a casting process.
DESCRIPTION OF PREFERRED EMBODIMENTS OF THE INVENTION
[0025] In the following, the invention will be explained in greater
detail on the basis of exemplary embodiments and with reference to
a drawing. In the drawing:
[0026] FIG. 1 shows a longitudinal section through a guide roller
for wires
[0027] FIG. 2 shows a longitudinal section through a corner area of
the guide roller for wires shown in FIG. 1.
[0028] The guide roller for wires of which a longitudinal section
view is represented in FIG. 1 is intended for separating thin
slices of a hard material, for example a silicon crystal, with the
aid of wires. In this context, a wire, possibly coated with diamond
dust or a wetted with a cutting emulsion is looped together in
several windings round two or more parallel-axle rollers and the
hard material is cut and separated into thin slices at several
adjacent and parallel points simultaneously by the wire. For this
purpose, the rollers are equipped with a coating support, the
outside of which has a polyurethane coating 4 adhering permanently
thereto. Coating 4 is provided with grooves extending
circumferentially for guiding the wire.
[0029] Coating support 1 is in the shape of a hollow cylinder and
is supported on a hub part by a stabilising support 2 made from CFP
or steel, which also has the form of a hollow cylinder. It is
provided that coating support 1 is made from CFP and is secured on
stabilising support 2 only by press-fitting, without the use of
screws or shrink fitting, and that the hub part is in contact with
the inside of the stabilising support via radial flanges at least
in the area of the frontal surfaces. Coating support 1 consists of
fibre strands that are stuck together with synthetic resin and
arranged one on top of the other in multiple plies and are aligned
at an angle of +/-30 to 60.degree. relative to the longitudinal
axis of the respective hollow cylinder, the fibre strands arranged
in the consecutive layers in the radial direction intersecting with
one another in the opposite direction. The preferred angle is +/-40
to 50.degree.. Additionally, one layer of fibres extending
essentially circumferentially is contained in coating support 1
particularly to increase stiffness and stability in the
circumferential direction. Accordingly, there is no likelihood of
relative shift of the coating support even during prolonged
use.
[0030] The coating support may be used irrespectively of its
direction of rotation, which simplifies mounting considerably.
Mounting and removal may be carried out at a normal temperature by
mounting the pre-coated, ready-to-use coating support on the
stabilising support and removing it therefrom with the aid of a
press. In order to fix the coating support, it is not necessary to
screw the coating support nor does a special material pairing have
to be used with respect to the coating support and the stabilising
support, and temperature ranges that may possibly cause the parts
to become separated due to the different coefficients of thermal
expansion of the coating support and the stabilising support do not
have to be avoided in normal use. This significantly simplifies the
production, mounting and removal of the tubular coating support as
well as the use of the ready-to-use guide roller for wires. At the
same time, the roller demonstrates excellent radial run-out.
[0031] Because of their differing functions, stabilising support 2
and coating support 1 are also constructed differently, provided
that the radial layer thickness of stabilising support 2 is at
least three, preferably at least five times greater than that of
coating support 1. The radial layer thickness of the stabilising
support may be 20 to 60 mm depending on the length of the guide
roller for wires.
[0032] Without the coating, the coating support has a wall
thickness equal to 1 to 3% of its outer diameter. As a result, it
may be manufactured, coated and mounted without difficulty.
[0033] The flanges on the frontal faces of hub part 3 are joined
flush with the inner circumference of stabilising support 2 by
adhesion or welding. The stabilising support may thus be made from
CFP or steel.
[0034] If the flanges and stabilising support 2 are stuck together
using synthetic resin, it is practical to use a resin that is
chemically compatible with the resin used to stick the fibre
strands of the coating support and the stabilising support
together.
[0035] The stabilising support may be braced between the metal
flanges on the frontal surfaces by at least one further metal
flange to prevent oval deformations from occurring under the
pressure of prolonged one-sided loads. The number of additional
flanges may be altered according to needs.
[0036] Stabilising support 2 is delimited on the outside by a
cylindrical surface 2.1, which is calibrated by a grinding process.
In this context, it would not be difficult for one skilled in the
art to fix the diameter set in the grinding process such that a
secure press fitting is obtained, ensuring that the coating support
does not twist or shift undesirably on the stabilising support
during normal use, yet still allows the coating support to be slid
off of the stabilising support in the longitudinal direction with
the aid of a press when necessary.
[0037] If an existing guide roller for wires is to be converted in
a manner envisaged by the invention, any coating that is already
present thereon is removed and the outer diameter is calibrated in
accordance with the explanations given in the preceding.
[0038] Coating support 1 is delimited on the outside by a
cylindrical surface 1.1, which has been given a fabric structure by
a peel ply that has been removed previously and/or has been
calibrated and roughed in a grinding process to ensure that the
polyurethane coating is particularly securely embedded and to
enable the profile of the coating to be formed extremely
precisely.
[0039] The features of the invention disclosed in the preceding
description, the claims and the drawing may be pertinent either
individually or in any combination for the realisation of the
invention in its various embodiments.
* * * * *