| (19) |
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(11) |
EP 1 375 101 A1 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (43) |
Date of publication: |
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02.01.2004 Bulletin 2004/01 |
| (22) |
Date of filing: 29.05.2003 |
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International Patent Classification (IPC)7: B28D 1/12 |
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| (84) |
Designated Contracting States: |
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AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR |
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Designated Extension States: |
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AL LT LV MK |
| (30) |
Priority: |
30.05.2002 IT MS20020004 U
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Applicant: Quarry Service Srl |
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54033 Carrara (IT) |
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| (72) |
Inventor: |
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- Calzolari, Giancarlo
54033 Carrara (MS) (IT)
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| (54) |
Tooth with diamond insert with mechanical fixing |
(57) The mechanical fastening of the fitted diamond plates, which are employed on chain
saw devices for solid rock cutting, protects the cutting tool from thermal shocks
due to detachment and respective re-soldering; moreover, the machine standstill will
be notably reduced by rotating the tool, thus allowing the utilization of the entire
diamond plates circumference.
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[0001] With the inserts "stratapax" (diamonded) it is possible to execute cuts there where
the normal inserts of hard metal (WIDIA) don't make it possible. In a lot of cases
the employment of these materials is necessary to overcome, during the cut, "spots"
of stone that are harder. Until today, the fixing system of these inserts foresees
a direct welding of the insert on the insert holder or its stirruping through tightening
with screw. The first system has the disadvantage that, in order to use the insert
on the best way, it has to be turned various times to use the various cutting edges
and each time it has to be unsolded and solded again. This brings to thermical shocks
of the material that deteriorates so quickly.
[0002] Besides that the welding operation is very delicate and have to be executed in a
proper place with the employment of particular equipments.
[0003] The fixing system through bracket and screw isn't optimal for what regards the vibrations
to which it is exposed and they cause during the works often the loosening of the
screw or the breakage of the bracket.
[0004] The system studied foresees a mechanical processing on the insert holder (pict. 4-part.1)
in order to reach a seat of housing for the insert support (pict. 4-part 3) as well
as a hole vertical to the axle of that support where an elastic pin is inserted in
a forced way (pict. 4 - part. 2).
[0005] The insert support 3 has such a form to be inserted in the housing of the insert
holder 1 and to be paired with the elastic pin 2 remaining so fixed.
[0006] The diamond insert 4 is fixed to the support for insert 3.
[0007] The whole chain is composed of insert holders built and assembled as above described.
1. The mechanical fixing, compared with the usual fixing, foresees only one welding operation
and maintains so the mechanical and hardness characteristics of the material of which
the insert is built until the same is not completely consumed.
2. The support with mechanical fixing, allows, with the simple removal of the elastic
pin, a higher rapidity of the turning of the insert, which can so be used on the whole
cutting edge.
3. The support with mechanical fixing allows, with the simple removal of the elastic
pin, to execute the operation directly on the place, this means in the quarry, reducing
in a considerable way the time of remaining stationary of the machine.
4. The support with mechanical fixing allows, with the simple removal of the elastic
pin, the substitution of the insert in very short time.
5. The support with mechanical fixing protects the insert from the strokes, as it is
elastically fixed.
The so conceived invention susceptible of numerous improvements and variations, all
included within the inventive concept, moreover all details can be substituted with
others of the same technical value. The materials and the dimensions of the invention
as above described, illustrated with the drawings attached and then vindicated, could
be of each choice depending on the requirements.
