U.S. patent application number 14/442914 was filed with the patent office on 2015-11-19 for processing disk for processing a substrate.
The applicant listed for this patent is HILTI AKTIENGESELLSCHAFT. Invention is credited to Elham Khatibi, John Russell, Brijesh Rasiklal Shah, Martin Spycher.
Application Number | 20150328746 14/442914 |
Document ID | / |
Family ID | 49578301 |
Filed Date | 2015-11-19 |
United States Patent
Application |
20150328746 |
Kind Code |
A1 |
Spycher; Martin ; et
al. |
November 19, 2015 |
PROCESSING DISK FOR PROCESSING A SUBSTRATE
Abstract
A processing disk (10) for processing a substrate (22),
including a carrying body (11) having an accommodation region (13)
and a processing region (14) and including a processing section
(17) having one or more segments (12) that are connected to a
connection region (24) of the carrying body (11), wherein a cooling
opening (25) is provided in at least one segment (12) and/or in at
least one connection region (24) of the carrying body (11) for a
segment (12).
Inventors: |
Spycher; Martin;
(Richterswil, CH) ; Khatibi; Elham; (Buchs,
CH) ; Russell; John; (Hassocks, GB) ; Shah;
Brijesh Rasiklal; (Gujarat, IN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
HILTI AKTIENGESELLSCHAFT |
Schaan |
|
LI |
|
|
Family ID: |
49578301 |
Appl. No.: |
14/442914 |
Filed: |
November 12, 2013 |
PCT Filed: |
November 12, 2013 |
PCT NO: |
PCT/EP2013/073577 |
371 Date: |
May 14, 2015 |
Current U.S.
Class: |
451/488 |
Current CPC
Class: |
B24D 7/10 20130101; B24D
7/06 20130101 |
International
Class: |
B24D 7/10 20060101
B24D007/10; B24D 7/06 20060101 B24D007/06 |
Foreign Application Data
Date |
Code |
Application Number |
Nov 16, 2012 |
DE |
10 2012 220 944.1 |
Claims
1-11. (canceled)
12. A processing disk for processing a substrate comprising: a
support body including a reception region and a processing region;
and a processing section including one or multiple segments, the
segments being connected to a connection region of the support
body, a cooling opening being provided at least partially in at
least one segment or in at least one connection region of the
support body to a segment.
13. The processing disk as recited in claim 12 wherein the cooling
opening is provided completely in the at least one segmentor or in
the at least one connection region of the support body.
14. The processing disk as recited in claim 12 wherein the cooling
opening is formed in the support body.
15. The processing disk as recited in claim 14 wherein the cooling
opening in the support body is designed as a through opening.
16. The processing disk as recited in claim 14 wherein the cooling
opening in the support body is designed as a blind opening.
17. The processing disk as recited in claim 14 wherein the cooling
opening is formed in the support body and in the segment.
18. The processing disk as recited in claim 17 wherein the cooling
opening is designed as a through opening in the support body and as
a through opening in the segment.
19. The processing disk as recited in claim 17 wherein the cooling
opening is designed as a through opening in the support body and as
a blind opening in the segment.
20. The processing disk as recited in claim 12 wherein the cooling
opening is designed as a through opening in the segment.
21. The processing disk as recited in claim 12 wherein the cooling
opening amounts to up to 80% of the cross-sectional area of the
segments.
22. The processing disk as recited in claim 12 wherein the cooling
opening is filled with a heat conducting material, the heat
conductivity of the material being higher than the heat
conductivity of the support body.
Description
[0001] The present invention relates to a processing disk for
processing a substrate.
[0002] The term "processing disk" subsumes all processing disks for
processing a substrate using grinding, cutting, and similar
processing methods. The processing disks may be designed as flat or
pot-shaped processing disks, and include a support body and a
processing section made of one or multiple segments which are
connected to the support body. The processing disks may have
multiple segments or a single, annular segment. Depending on the
respective processing method of a processing disk, the segments are
designated as grinding segments or cutting segments.
BACKGROUND
[0003] A processing disk designed as a grinding disk for surface
processing of a mineral, coated, or other substrate is known from
EP 0 865 878 A1. The grinding disk is designed as pot-shaped and
includes a support body having a reception region and a grinding
region as well as a processing section including multiple grinding
segments. The grinding segments are connected to a connection
region of the support body on a backside facing away from the
substrate to be processed. Soldering and welding, among others, are
used as processing methods for connecting the grinding segments. In
order to exhaust removed material, the grinding disk has exhaust
openings in the support body, via which removed material is
exhausted by an exhaust system.
[0004] During the surface processing using the grinding disk, the
grinding segments heat up due to friction with the substrate to be
processed. In order to increase the lifespan of the grinding
segments and to support the machining process, the grinding disk is
cooled during processing. The coolant flows via the intermediate
spaces between the grinding segments and the exhaust openings in
the support body into the inner region of the grinding disk. The
grinding segments are cooled on the one hand by the coolant and on
the other hand emit heat to the cooled support body.
[0005] The known processing disk has the disadvantage that the
lifespan of the segments is limited, despite addition of a coolant
via the intermediate spaces between the cutting segments. In
addition, cooling is impeded due to small intermediate spaces
between the segments.
SUMMARY OF THE INVENTION
[0006] It is an object of the present invention to provide a
processing disk for processing a substrate having an increased
lifespan of the segments. In addition, the processing speed during
the processing should be increased.
[0007] According to the present invention, a cooling opening is
provided at least partially in at least one segment and/or in at
least one connection region of the support body to a segment.
Cooling openings, which are provided in the connection region of
the support body, in the segment, or in the support body and in the
segment, improve the heat dissipation from the segments during the
processing of a substrate. Due to the improved heat dissipation,
the lifespan of the segments and the processing speed during
processing are increased.
[0008] The at least one cooling opening is preferably provided
completely in at least one segment and/or in at least one
connection region of the support body. If the cooling opening is
situated completely in the segment or in the segment and in the
connection region, then the contact surface for the coolant with
the segment is enlarged and the cooling effect is increased. The
coolant is liquid or gaseous, air being primarily used as the
coolant.
[0009] In a first variant, the cooling opening is formed in the
support body, the cooling opening being designed as a through
opening or as a blind opening. The formation of the cooling opening
in the support body has the advantage of easy producibility. The
support body is, for example, formed as a steel body and the
cooling opening is created in the support body by drilling,
milling, stamping, or comparable manufacturing methods.
[0010] A cooling opening passing through the support body, which is
designated as a through opening, has the advantage that the coolant
contacts the backside of the segments and the heat is released from
the segment directly to the coolant. The size and geometry of the
cooling opening are selected in such a way that a secure fastening
of the segment to the connection region of the support body is
ensured and the shear forces necessary for approving the processing
disk are maintained. The through opening has a further advantage;
it reduces the connection surface between the segment and the
support body and thereby increases the contact pressure during
welding. The higher contact pressure results in a better connection
between the segment and the support body.
[0011] A cooling opening that does not pass completely through the
support body, which is designated as a blind opening, has the
advantage that the connection surface between the support body and
the segments is not reduced by the cooling opening. The blind
opening in the support body is suitable for processing disks in
which the fastening of the segments on the support body is
critical.
[0012] In a second variant, the cooling opening is formed in the
support body and in the segment. The formation of the cooling
opening in the support body and in the segment enlarges the contact
surface between the segment and the coolant and thereby increases
the heat transmission from the segment to the coolant. The larger
the contact surface between the segment and the coolant, the better
the cooling effect for the segment and the higher the lifespan of
the segments.
[0013] The cooling opening is preferably formed as a through
opening in the support body and as a through opening in the
segment. A cooling opening passing completely through the support
body and the segment enlarges the contact surface between the
segment and the coolant and improves the cooling effect. The
coolant flows through the entire segment and transports the heat
away from the segment. In addition, removed material may be
evacuated via the cooling openings.
[0014] The cooling opening is alternatively formed as a through
opening in the support body and as a blind opening in the segment.
A cooling opening not passing completely through the segment has
the advantage that the entire cross-sectional area of the segment
is available for the processing.
[0015] In a third variant, the cooling opening is formed as a
through opening in the segment. The through opening in the segment
reduces the connection surface between the segment and the support
body and thereby increases the contact pressure during welding. The
higher contact pressure results in a better connection between the
segment and the support body.
[0016] The cooling opening amounts to up to 80% of the
cross-sectional area of the segment in a preferred embodiment. The
larger the contact surface between the segment and the coolant, the
better the cooling effect for the segment and the longer the
lifespan of the segments. In order to ensure a secure fastening of
the segments to the support body and to achieve the prescribed
shear forces, the connection surface between the segment and the
support body amounts to at least 20% of the cross-sectional area of
the segments.
[0017] In a further preferred embodiment, the cooling opening is
filled with a heat conducting material, the heat conductivity of
the material being higher than the heat conductivity of the support
body. Copper, resin, and aluminum are suitable as materials for
support bodies made of steel. Filling the cooling opening with a
heat conducting material is suitable for processing disks, whose
stability is to be increased. In order to improve the cooling
effect with regard to processing disks without cooling openings, a
material is selected whose heat conductivity is higher than the
heat conductivity of the support body.
[0018] Exemplary embodiments of the present invention will be
subsequently described based on the drawings. These do not
necessarily represent the exemplary embodiments to scale; rather,
the drawings are carried out in schematic and/or slightly distorted
form where this is useful to the explanation. Reference is made to
the relevant prior art in view of additions from the teachings
directly recognizable from the drawing. It is thereby taken into
consideration that multiple modifications and changes affecting the
shape and detail of a specific embodiment may be carried out
without deviating from the general concept of the present
invention. The features of the present invention disclosed in the
description, the drawings, and also in the claims may be essential
for the refinement of the present invention, individually as well
as in any arbitrary combination. In addition, the scope of the
present invention includes all combinations of at least two of the
features disclosed in the description, the drawings, and/or the
claims. The general concept of the present invention is not limited
to the exact form or detail of the preferred specific embodiment
described and shown in the following, or limited to a subject
matter which would be limited in comparison to the subject matter
claimed in the claims. With regard to the dimensional ranges cited,
values lying within the listed limits are disclosed as limiting
values and should be arbitrarily applicable and claimable.
BRIEF DESCRIPTION OF THE DRAWINGS
[0019] For the sake of simplicity, the same reference numerals are
subsequently used for identical or similar parts, or for parts
having identical or similar functions.
[0020] FIGS. 1A through C show a first specific embodiment of a
processing disk according to the present invention designed as a
grinding disk including a support body and multiple grinding
segments in a view from below onto the grinding segments (FIG. 1A),
in a section through the grinding disk along line I-I in FIG. 1A
(FIG. 1B), and in a top view onto the support body (FIG. 1C);
and
[0021] FIGS. 2A, B show a second specific embodiment of a
processing disk according to the present invention including a
support body and multiple grinding segments in a view from below
onto the grinding segments (FIG. 2A) and in a section through the
grinding disk along line II-II in FIG. 2A (FIG. 2B).
DETAILED DESCRIPTION
[0022] FIGS. 1A through C show a first specific embodiment of a
processing disk 10 according to the present invention for
processing a mineral or coated substrate. The processing disk is
designed as a pot-shaped grinding disk 10. Grinding disk 10
includes a support body 11 and multiple grinding segments 12 which
are connected to support body 11. Grinding segments 12 are, for
example, soldered or welded to support body 11 or fastened on
support body 11 with the aid of similar processing methods.
[0023] FIG. 1A shows grinding disk 10 in a view from below onto
grinding segments 12. Support body 11 of grinding disk 10 includes
a reception region 13, a processing region 14 designed as a
grinding region, and a transition region 15 connecting the
reception and grinding regions 13, 14 formed by the pot shape of
grinding disk 10; in the case of flat processing disks, the
transition region is eliminated. Reception region 13 of support
body 11 is used to fix grinding disk 10 on a drive shaft of a tool.
A central opening 16 for the drive shaft is provided in reception
region 13.
[0024] Grinding segments 12 are connected to support body 11 in
grinding region 14. Cutting segments 12 are designated collectively
as processing section 17 (see FIG. 1B). Grinding disk 10 has a
processing section 17 including seven triangular-shaped grinding
segments 12, the sides of grinding segments 12 being curved
outward. To distinguish the grinding segments and further elements
in the figures, an indicator ".i" is used. The number of grinding
segments 12 and the geometry of grinding segments 12 are adapted to
the diameter of grinding disk 10 and to the substrate to be
processed. In addition to triangular-shaped grinding segments 12,
L-shaped grinding segments, U-shaped grinding segments, and
rectangular grinding segments having curved lateral surfaces are
known. Grinding segments 12 have in each case two grooves 19 on a
front side 18 facing away from grinding region 14 of support body
11. Grooves 19 are used to facilitate exhaustion of removed
material.
[0025] Grinding region 14 has multiple exhaust openings 21, which
are situated in the circumferential direction of grinding disk 10
and have essentially the same distance to each other. During
grinding with grinding disk 10, material removed from the substrate
being processed is exhausted via exhaust openings 21. Exhaust
openings 21 are shaped as ovals for grinding disk 10 and are
displaced relative to transition region 15 of support body 11. In
order to ensure a good exhaustion, exhaust openings 21 should be
preferably large. On the other hand, support body 11 must have a
sufficient stability in grinding region 14.
[0026] FIG. 1B shows a section through grinding disk 10 and first
grinding segment 12.1 along line I-I in FIG. 1A during processing
of a substrate 22. The connection between support body 11 and
grinding segments 12 is described using the example of first
grinding segment 12.1 and applies analogously for the six further
grinding segments 12.2 through 12.7 of processing section 17, which
are constructed identically to first grinding segment 12.1.
[0027] First grinding segment 12.1 is connected to support body 11
on a back side 23 facing away from front side 18. Support body 11
has a connection region 24.1 at which grinding segment 12.1 is
fastened to support body 11. The entire region of support body 11,
to which first grinding segment 12.1 abuts, is designated as a
connection region; the connection region does not only include the
connection surface.
[0028] An opening 25.1, which is designated as a cooling opening,
is provided in connection region 24.1 of support body 11. Cooling
opening 25.1 is designed in support body 11 as a through opening
which passes completely through support body 11. A coolant flows
via through opening 25.1 through support body 11 to grinding
segment 12.1 and cools grinding segment 12.1 on back side 22. The
coolant is liquid or gaseous, air being primarily used as the
coolant.
[0029] FIG. 1C shows grinding disk 10 in a top view onto support
body 11. Seven oval-shaped exhaust openings 21.1 through 21.7 and
seven circular cooling openings 25.1 through 25.7 are provided in
grinding region 14 of support body 11. Circular cooling openings
25.1 through 25.7 are situated in connection regions 24.1 through
24.7 of support body 11 and exhaust openings 21.1 through 21.7 are
situated in grinding region 14 between connection regions 24.1
through 24.7.
[0030] The coolant flows into cooling openings 25 and cools
grinding segments 12 on backside 22. The heat from grinding
segments 12 is released directly to the coolant. The cooling of
grinding segments 12 improves with the increasing size of cooling
opening 25. The size of cooling openings 25 is thereby limited in
that grinding segments 12 are connected to support body 11 on
backside 22. Therefore, the size of cooling openings 25 is selected
in such a way that, in addition to a good cooling, a secure
fastening of grinding segments 12 on support body 11 is ensured and
the prescribed shear forces are achieved for the approval of
processing disk 10.
[0031] Alternatively to cooling openings 25 shown in FIGS. 1A
through C, which as through openings pass through connection region
24 of support body 11, the cooling openings may be designed in
support body 11 as blind openings. Blind openings do not reduce the
connection surface between support body 11 and grinding segments
12; however, the cooling effect is lower for blind openings than
for through openings.
[0032] Grinding disk 10 has seven triangular grinding segments 12.1
through 12.7 and seven circular cooling openings 25.1 through 25.7
in connection regions 24.1 through 24.7 of support body 11.
Alternatively, the grinding disk may have different grinding
segments with differently shaped cooling openings, the cooling
openings may be situated at different positions in the connection
region with identically constructed grinding segments, or the
geometry of the cooling openings may differ with identically
constructed grinding segments. The geometry of cooling openings 25
is adapted to the geometry of grinding segments 12, to the
substrate to be processed, etc. A circle, a triangle, a rectangle,
an octagon, a star shape, or an ellipse, among others, are suitable
as the geometry for cooling openings 25.
[0033] FIGS. 2A, B show a second specific embodiment of a
processing disk 30 according to the present invention for surface
processing of a mineral or coated substrate. Processing disk 30 is
designed like processing disk 10 as a pot-shaped grinding disk.
[0034] Grinding disk 30 includes a support body 31 and multiple
grinding segments 32, which are connected to support body 31.
Grinding disk 30 differs from grinding disk 10 from FIGS. 1A
through C in the cooling openings, which are provided in support
body 31 and grinding segments 32.
[0035] FIG. 2A shows grinding disk 30 in a view from below onto
grinding segments 32. Support body 31 of grinding disk 30 includes,
like support body 11 of grinding disk 10, grinding region 14,
transition region 15, and reception region 13 including central
opening 16. Grinding segments 32 are designed as triangular, and
grinding segments 32 each have two grooves 19 on the front side 18
facing away from grinding region 14.
[0036] One cooling opening 33 is assigned to each grinding segment
32. Cooling openings 33 are designed as circular through openings,
which pass completely through support body 31 and grinding segments
32. The coolant flows on the upper side of support body 31 into
cooling openings 33, flows through support body 31 and grinding
segments 32, and is exhausted by the exhaust system together with
the removed material.
[0037] FIG. 2B shows grinding disk 30 in a section through grinding
disk 30 and first grinding segment 32.1 along line II-II in FIG. 2A
during the processing of substrate 22. The connection between
support body 31 and grinding segments 32 and the arrangement of
cooling openings 33 in support body 31 and grinding segments 32 is
described by way of first grinding segment 32.1 as an example, and
applies analogously for all further grinding segments 32.2 through
32.7.
[0038] Support body 31 has a connection region 34.1, at which
grinding segment 32.1 is connected to support body 31. Cooling
opening 33.1 is in two parts formed from one through opening 35.1
in support body 31 and one through opening 36.1 in grinding segment
32.1. Cooling opening 33 passing completely through support body 31
and grinding segment 32.1 has the advantage that the cooling effect
is improved by the large contact surface between the coolant and
grinding segment 32.1.
[0039] The cross-sectional area of cooling openings 33 is limited
in that the connection surface for fastening grinding segment 32 is
reduced by the cross section of cooling opening 33. Prescribed
shear forces must be achieved for approval of the grinding disk.
For this purpose, a certain connection surface between support body
31 and grinding segment 32 is necessary. The size of the
cross-sectional area of cooling openings 33 is selected in such a
way that in addition to a good cooling, a secure fastening of
grinding segment 32 on support body 31 is ensured and the
prescribed shear forces are achieved.
[0040] Alternatively to the through openings 35, 36 in support body
31 and in grinding segment 32 shown in FIG. 2A, B, the cooling
openings may be designed in support body 31 as through openings and
in grinding segment 32 as blind openings.
* * * * *