GB1559968A - Grinding head - Google Patents
Grinding head Download PDFInfo
- Publication number
- GB1559968A GB1559968A GB19110/78A GB1911078A GB1559968A GB 1559968 A GB1559968 A GB 1559968A GB 19110/78 A GB19110/78 A GB 19110/78A GB 1911078 A GB1911078 A GB 1911078A GB 1559968 A GB1559968 A GB 1559968A
- Authority
- GB
- United Kingdom
- Prior art keywords
- support member
- shank
- cutting disc
- face
- grinding head
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 239000003082 abrasive agent Substances 0.000 description 2
- 239000002657 fibrous material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D5/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
- B24D5/16—Bushings; Mountings
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Description
(54) GRINDING HEAD (71) We, REINHOLD REILING and KARL REVILING both citizens of the Federal Republic of Germany, and both of D-7531 Kampfelbach-Ersingen, Grundeltorstrasse 9, Federal
Republic bf Germany, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement:
This invention relates two an abrading, buffing, or grinding head, hereinafter referred to as a grinding head, of the kind adapted to carry. replaceably a sheet of abrasive material and to be detachably and drivingly connected to a portable rotary power unit, and is an improvement in or modification of the invention set forth in our
Patent Number 1475979.
According to the present invention there is provided a grinding head of the kind adapted to carry replaceably an abrasive sheet and to be detachably and drivingly connected to a portable rotary power unit, said head comprising a circular dished support member having a convex outer face and a concave inner face; a shank having an inner end secured to and projecting centrally from the inner face of said support member, and having a screw-threaded inner end portion, and an outer end portion adapted to be detachably and drivingly connected to a portable rotary power unit; on said shank, a circular dished clamping member of smaller diameter than that of the support member and having an inner concave face facing the inner face of said support member, an outer convex face and a central hole through which said shank passes; a clamping nut on said screw-threaded portion of the shank and a cutting disc clamped between peripheral edge faces of the support member and the clamping member, the cutting disc being of greater diameter than the support member, and having a central hole through which the shank passes.
Preferably, the cutting disc is flexible, and the clamping action of said member is such as to cause the disc to flex and increase its stability.
An embodiment of the invention will now be described, by way of example, with refer ence to the accompanying diagrammatic
drawings, in which: Fig. 1 is an exploded sectional view of a
grinding head and a cutting disc according to
the present invention1 and
Fig. 2 is an assembled view corresponding
to Fig. 1.
Referring to the drawings, the grinding
.head shown corresponds to that shown and
described in. Patent Number 1475979, except
that the hard-paffding member and the sheet of abrasive material.are omitted, as these, and
especially the latter are not required when the
cutter blade is fitted. A detailed description of
the grinding head is therefore unnecessary,
and the various parts will simply be indicated
by reference numerals.
2 indicates the support member, 3 its
peripheral edge, 4 the spindle or shank, 5 the
screw-threaded inner portion of the shank,
and 6 the outer portion of the shank adapted
to be detachably and drivingly connected to a
portable rotary power unit. 7 indicates a
cutting disc, 8 the clamping member, 9 the
peripheral edge of the latter, and 10 the
clamping nut.
The cutting disc 7 has a central hole
through which the shank 4 passes, as shown
in Fig. 2. Also as shown in Fig. 2, the cutting
blade 7 is clamped between the peripheral
edge 3 of the support member 2 and the
peripheral edge 9 of the clamping member 8.
The cutting disc 7 is, of course, of greater
diameter than the support member 2, and, as
the latter is of greater diameter than the
clamping member 8, the respective peripheral
edges 3 and 9 of the members 2 and 8 abut
the cutting disc 7 in radially spaced zones, as
shown in Fig. 2.
Thus, when the blade 7 is flexible, and
especially a known blade incorporating fib
rous material, the nut 10 can be tightened
sufficiently to cause the cutting disc 7 to flex
slightly out of its plane or become slightly
dished due to the radial spacing between the
peripheral clamping edges 3 and 9. This
results in the cutting disc 7 being surprisingly
firmly gripped by the members 2 and 8, and
also results in the cutting disc becoming
stabilised or rigidified sufficiently to eliminate or reduce the tendency for such blades to flutter in use.
WHAT WE CLAIM IS:
1. A grinding head of the kind adapted to carry replaceably an abrasive sheet and to be detachably and drivingly connected to a portable rotary power unit, said head comprising a circular dished support member having a convex outer face and a concave inner face: a shank having an inner end secured to and projecting centrallyfrom the inner face of said support member, and having a screw-threaded inner end portion, and an outer end portion adapted to be detachably and drivingly connected to a portable rotary power unit; on said shank, a circular dished clamping member of smaller diameter than that of the support member and having an inner concave face facing the inner face of said support member, an outer convex face and a central hole through which said shank passes; a clamping nut on said screw-threaded portion of the shank; and a cutting disc clamped between peripheral edge faces of the support member and the clamping member, the cutting disc being of greater diameter than the support member, and having a central hole through which the shank passes.
2. A grinding head as claimed in Claim 1, in which the cutting disc is flexible, and the clamping action of the said members is such as to cause the disc to flex and increase its stability, so that, in use, any tendency for the disc to flutter is eliminated or reduced.
3. A grinding head and a cutting disc as claimed.in Claim 1 substantially as hereinbefore described with reference to the accompanying drawings.
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (3)
1. A grinding head of the kind adapted to carry replaceably an abrasive sheet and to be detachably and drivingly connected to a portable rotary power unit, said head comprising a circular dished support member having a convex outer face and a concave inner face: a shank having an inner end secured to and projecting centrallyfrom the inner face of said support member, and having a screw-threaded inner end portion, and an outer end portion adapted to be detachably and drivingly connected to a portable rotary power unit; on said shank, a circular dished clamping member of smaller diameter than that of the support member and having an inner concave face facing the inner face of said support member, an outer convex face and a central hole through which said shank passes; a clamping nut on said screw-threaded portion of the shank; and a cutting disc clamped between peripheral edge faces of the support member and the clamping member, the cutting disc being of greater diameter than the support member, and having a central hole through which the shank passes.
2. A grinding head as claimed in Claim 1, in which the cutting disc is flexible, and the clamping action of the said members is such as to cause the disc to flex and increase its stability, so that, in use, any tendency for the disc to flutter is eliminated or reduced.
3. A grinding head and a cutting disc as claimed.in Claim 1 substantially as hereinbefore described with reference to the accompanying drawings.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2727576A DE2727576C2 (en) | 1977-06-18 | 1977-06-18 | Clamping flange for clamping fiber-reinforced, flexible cutting discs |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1559968A true GB1559968A (en) | 1980-01-30 |
Family
ID=6011854
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB19110/78A Expired GB1559968A (en) | 1977-06-18 | 1978-05-12 | Grinding head |
Country Status (4)
Country | Link |
---|---|
DE (1) | DE2727576C2 (en) |
FR (1) | FR2394366A2 (en) |
GB (1) | GB1559968A (en) |
IT (1) | IT1159660B (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2445025B (en) * | 2006-12-21 | 2011-10-26 | Cinetic Landis Grinding Ltd | Grinding surfaces of workpieces |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2562327A (en) * | 1951-01-05 | 1951-07-31 | Moore Jay Clair | Mandrel |
US2846826A (en) * | 1957-02-26 | 1958-08-12 | Super Cut | Mounting and truing device for peripheral type circular grinding or cutting wheels |
DE1925017A1 (en) * | 1969-05-16 | 1970-11-26 | Reinhard Heil | Attachment of cutting disks on angle grinders |
CH514403A (en) * | 1970-12-02 | 1971-10-31 | Studer Ag Fritz | Damping device on a grinding wheel |
-
1977
- 1977-06-18 DE DE2727576A patent/DE2727576C2/en not_active Expired
-
1978
- 1978-05-08 IT IT68037/78A patent/IT1159660B/en active
- 1978-05-12 GB GB19110/78A patent/GB1559968A/en not_active Expired
- 1978-06-15 FR FR7818336A patent/FR2394366A2/en active Granted
Also Published As
Publication number | Publication date |
---|---|
FR2394366A2 (en) | 1979-01-12 |
FR2394366B2 (en) | 1982-04-16 |
IT1159660B (en) | 1987-03-04 |
DE2727576B1 (en) | 1978-07-06 |
IT7868037A0 (en) | 1978-05-08 |
DE2727576C2 (en) | 1979-02-22 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |