Machine tools abstract
Air is removed by suction from the interior of an enclosure of
machine tools by means of exhaust systems. The cuttings which are
produced during machining of the workpieces are distributed within
the working chamber and are thrown to the exhaust location and removed
by suction. The cuttings collect in the exhaust area and present
a safety risk. In order to prevent undesirable components in the
exhaust air from reaching the exhaust system, an air-permeable catch
device is provided in the exhaust area in front of the exhaust location.
On the catch device, the undesirable components are caught while
the exhaust action itself is not impaired. The exhaust system is
used for enclosures of machine tools.
Machine tools claims
1. An exhaust system, in particular, for a housing-type enclosure
of machine tools, comprising at least one exhaust location, preferably,
an exhaust socket connected to a mounting frame, characterized in
that the exhaust system has at least one air-permeable catch device
(18) in the exhaust area in front of the exhaust location (16).
2. The exhaust system according to claim 1 characterized in that
the catch device (18) is a basket with sidewalls (19 to 21), of
which at least one sidewall, preferably, all sidewalls, are woven-like.
3. The exhaust system according to claim 2 characterized in that
the sidewalls (19 to 21) of the catch device (18) are connected
by a bottom (22).
4. The exhaust system according to claim 3 characterized in that
the bottom (22) is at least partially woven-like.
5. The exhaust system according to claim 1 characterized in that
the catch device (18) is attached to the mounting frame (3).
6. The exhaust system according to claim 1 characterized in that
the mounting frame (3) is provided with at least one handle (13
14).
7. The exhaust system according to claim 6 characterized in that
the handle (13 14) projects transversely from the mounting frame
(3).
8. The exhaust system according to claim 6 characterized in that
opposed frame sides (4 6) of the mounting frame (3) are provided
with a handle (13 14), respectively.
9. The exhaust system according to claim 1 characterized in that
the mounting frame (3) overlaps the rim of a mounting opening (2)
with outwardly angled edges (8 to 11) of its frame sides (4 to 7).
10. The exhaust system according to claim 1 characterized in that
the catch device (18) is positioned in the effective range of at
least one cleaning unit (23) for the catch device (18).
11. The exhaust system according to claim 1 characterized in that
the cleaning unit (23) projects into the catch device (18).
12. The exhaust system according to claim 10 characterized in
that the cleaning unit (23) has at least one cleaning nozzle (24).
13. The exhaust system according to claim 12 characterized in
that the cleaning nozzle (24) is rotatable about its axis (25).
14. The exhaust system according to claim 10 characterized in
that the cleaning unit (23) is arranged in the area between the
exhaust socket (16) and the edge of the mounting frame (3).
15. The exhaust system according to claim 12 characterized in
that the cleaning nozzle (24) is connected to a supply line (27)
for a cleaning medium.
16. The exhaust system according to claim 15 characterized in
that a valve (28) is arranged in the supply line (27).
17. The exhaust system according to claim 1 characterized in that
the exhaust socket (16) is provided with at least one positive-locking
counter element (39) for at least one positive-locking element (36)
projecting past an outer peripheral surface of a clamping ring (31)
seated on an exhaust hose (29) and contacting under tension the
inner wall (38) of the exhaust socket (16).
18. The exhaust system according to claim 17 characterized in
that the positive-locking element (36) is ring-shaped and is fastened
on the clamping ring (31).
19. The exhaust system according to claim 17 characterized in
that the positive-locking element (36) is comprised of metal.
20. The exhaust system according to claim 17 characterized in
that the positive-locking element (36) has a part-circular cross-section.
21. The exhaust system according to claim 17 characterized in
that the positive-locking counter element (39) is a recess in the
inner wall (38) of the exhaust socket (16).
22. The exhaust system according to claim 21 characterized in
that the recess (39) is an annular groove.
23. The exhaust system according to claim 17 characterized in
that the positive-locking counter element (39) is a radially outwardly
deformed part of the exhaust socket (16).
24. The exhaust system according to claim 17 characterized in
that the clamping ring (31) is slotted.
25. The exhaust system according to claim 17 characterized in
that the clamping ring (4) rests with its own spring force against
the inner wall (38) of the exhaust socket (16).
26. The exhaust system according to claim 17 characterized in
that the clamping ring (31) rests with radial, externally applied
pressure against the inner wall (38) of the exhaust socket (16).
27. The exhaust system according to claim 26 characterized in
that on the clamping ring (31) a pressure device (40) is seated
with which the clamping ring (31) is elastically spreadable for
contacting the inner wall (38) of the exhaust socket (16).
28. The exhaust system according to claim 27 characterized in
that the pressure device (40) is a hose clamp fastened on the outer
peripheral surface of the clamping ring (31).
29. The exhaust system according to claim 17 characterized in
that the end (35) of the clamping ring (31) facing the exhaust socket
(16) is folded inwardly.
30. The exhaust system according to claim 29 characterized in
that the folded portion (35) is U-shaped in cross-section.
31. The exhaust system according to claim 29 characterized in
that the exhaust hose (29) rests against the bottom (41) of the
folded portion (35).
32. The exhaust system according to claim 1 characterized in that
the exhaust hose (29) is fastened in a plug-in receptacle (42) insertable
into the exhaust socket (16).
33. The exhaust system according to claim 32 characterized in
that the exhaust hose (29) is fastened by a sealing compound in
the exhaust socket (16).
34. The exhaust system according to claim 32 characterized in
that the plug-in receptacle (42) can be clamped by a quick-clamping
device relative to the exhaust socket (16).
35. The exhaust system according to claim 1 characterized in that
the exhaust system can be connected with a clamping device to the
mounting location (1).
36. The exhaust system according to claim 35 characterized in
that the clamping device has at least two clamping elements (48
to 51) adjustable relative to one another which are adjustable from
a release position into a clamping position.
37. The exhaust system according to claim 36 characterized in
that the clamping elements (48 to 51) are provided near an edge
(9 11) of the mounting frame (3).
38. The exhaust system according to claim 36 characterized in
that the clamping elements (48 to 51) overlap one another in a telescoping
fashion.
39. The exhaust system according to claim 36 characterized in
that the clamping elements (48 to 51) can be clamped relative to
one another in the clamping position.
40. The exhaust system according to claim 36 characterized in
that the clamping elements (48 to 51) have at their ends facing
away from one another at least one clamping stay (54 55), respectively.
41. The exhaust system according to claim 40 characterized in
that the clamping stay (54 55) in the clamping position projects
past sidewalls (56 57) of the mounting frame (3).
42. The exhaust system according to claim 40 or 41 characterized
in that the clamping stay (54 55) is retracted when in the release
position.
43. The exhaust system according to one of the claims 40 to 42
characterized in that the clamping stay (54 55) in the clamping
position engages underneath a rim of the mounting opening (2).
Machine tools description
[0001] The invention relates to an exhaust system, in particular,
for housing-type enclosures of machine tools, according to the preamble
of claim 1.
[0002] Exhaust systems are known which are provided on housing-type
enclosures of machine tools. During operation of the machine tool,
air is constantly removed from the interior of the enclosure by
this exhaust system. In general, the cutting speeds of the machine
tools are high so that during machining of the workpieces cuttings
are distributed in the entire working space of the enclosure and
are thrown toward the exhaust location and removed by suction. Residual
cuttings in the exhaust area, for example, in the exhaust pipe,
result in the formation of nests of cuttings which represent a high
safety risk.
[0003] It is an object of the invention to configure the exhaust
system of the aforementioned kind such that unwanted components
in the exhaust air cannot enter the exhaust device.
[0004] This object is solved according to the invention for the
exhaust system of the aforementioned kind with the characterizing
features of claim 1.
[0005] In the exhaust system according to the present invention,
the catch device prevents undesirable components in the exhausted
medium from reaching the exhaust device. The undesirable components
are intercepted by the catch device. Since the catch device is air-permeable,
the exhaust action itself is not impaired.
[0006] In a configuration corresponding to claim 10 the catch
device is in the effective range of at least one cleaning unit.
By means of the cleaning unit, the catch device can be freed of
caught components which should not be exhausted. Since the cleaning
unit is provided on the exhaust system, a manual cleaning of the
catch device is not required. In this way, the exhaust system according
to the invention can be mounted also where a manual cleaning of
the catch device is not possible or possible only with great expenditure.
Often, the exhaust unit is positioned at a great height so that
auxiliary means such as ladders are required for cleaning the catch
device. When the exhaust unit is provided on an enclosure for a
machine tool, the machine tool must be shut down for cleaning the
catch device. With the exhaust system according to the invention,
cleaning of the catch device can be performed even while the machine
tool is operating.
[0007] According to a further embodiment, the exhaust socket of
the exhaust system according to the invention is provided with a
positive-locking counter element which interacts with the positive-locking
element of the clamping ring. It is seated on the exhaust hose and
inserted into the exhaust socket against whose inner wall it is
positioned under tension. By means of the positive-locking connection,
it is ensured in a simple and reliable fashion that the exhaust
hose cannot be accidentally pulled out of the exhaust socket.
[0008] The exhaust system according to the invention is characterized
in that it has three interfaces which can be arranged closely adjacent
to one another so that the exhaust system has a compact configuration.
The first interface is formed by the catch device which is positioned
in the exhaust direction in front of the exhaust location. The second
interface is formed by the cleaning unit with which, as needed,
the caught particles contained in the exhausted air can be removed
from the catch device. The third interface finally is formed by
the exhaust socket to which a flexible exhaust hose can be connected
in a simple way.
[0009] It is particularly advantageous when the exhaust system
is detachably mounted. It is then possible to detach it easily,
when needed, in order to service it, for example.
[0010] According to a further configuration according to the invention,
the exhaust system is attached by a clamping device on the mounting
location. The clamping device enables simple mounting and demounting.
[0011] Further features of the invention result from the additional
claims, the description, and the drawings.
[0012] The invention will be explained in more detail with the
aid of an embodiment illustrated in the drawings. It is shown in:
[0013] FIG. 1 a perspective illustration of an exhaust system according
to the invention;
[0014] FIG. 2 a plan view onto the exhaust system according to
FIG. 1;
[0015] FIG. 3 a view in the direction of arrow III of FIG. 2;
[0016] FIG. 4 a schematic illustration of the end of a hose which
is to be connected to the exhaust socket of the exhaust system;
[0017] FIG. 5 an axial section of an end of the exhaust socket;
[0018] FIG. 6 a schematic illustration in a side view of a second
embodiment of the exhaust hose secured in a plug-in receptacle;
[0019] FIG. 7 a perspective illustration of the exhaust system
according to the invention with clamping elements.
[0020] The exhaust system is used in connection with enclosures
of machine tools. Such machine tools are, for example, machining
centers which are arranged within a housing-type enclosure. At least
during processing of the workpieces on the machine, the exhaust
system is switched on. The enclosure is illustrated in FIGS. 1 and
3 by profiled sections 1. The enclosure is, of course, provided
with closed sidewalls and a closed ceiling. For receiving the exhaust
system, the enclosure 1 is provided with a corresponding mounting
opening 2 which is provided in the sidewalls and/or in the corner
of the enclosure.
[0021] The exhaust system comprises a mounting frame 3 which, in
this embodiment, has a square contour but, of course, can have any
other suitable contour. The frame sides 4 to 7 have an edge 8 to
11 angled outwardly at a right angle, and the mounting frame 3 overlaps
with its edge the rim of the mounting opening 2. By means of these
angled edges 8 to 11 the mounting frame 3 rests on the outer side
of the sidewall or ceiling of the housing-type enclosure 1.
[0022] The frame sides 4 to 7 are positioned at a right angle relative
to the base plate 12 which is recessed relative to the angled edges
8 to 11 of the frame sides 4 to 7.
[0023] In order for the mounting frame 3 to be mounted and, if
needed, detached easily, it is provided on two opposed frame sides
4 6 with an upwardly extending handle 13 14 respectively, which
is fastened on the corresponding frame sides in a suitable way.
[0024] The base plate 12 has preferably centrally an opening 15
to which is connected an exhaust socket 16. It has a circular cross-section
and is positioned with an annular flange 17 on the base plate 12.
The annular flange 17 is mounted by means of screws or the like
on the rim of the opening 15 on the base plate 12.
[0025] In the area underneath the exhaust socket 16 a cuttings
basket 18 is provided which is comprised of a wire mesh or plastic
mesh. The cuttings basket 18 has sidewalls 19 to 21 which adjoin
one another at a right angle and a bottom 22 which connects the
sidewalls 19 to 21 with one another. The sidewalls 19 to 21 reach
down to the baseplate 12 and are connected to its inner side in
a suitable way. The cuttings basket 18 serve for catching the cuttings,
which are produced in the working space of the enclosure when machining
the workpieces by means of the machine tool and which are sucked
away, so that they cannot reach the exhaust socket 60. The cuttings
are caught on the outer side of the cuttings basket 18 whose mesh
is so fine that the cuttings cannot penetrate. In order to compensate
at least as much as possible the cross-sectional loss caused by
the presence of the mesh of the cuttings basket 18 the mesh basket
is formed in the described way as a hood with four lateral walls
and a bottom so that the air can enter via five sides of the cuttings
basket 18. The air resistance is maximally approximately 20 Pa.
Since it is prevented that workpiece cuttings reach the exhaust
system, no deposits will form in the hose connected to the exhaust
socket 16. In this way, damage of the exhaust device is reliably
prevented without this going hand in hand with an increased air
resistance at the exhaust location.
[0026] In order to be able to remove from the cuttings basket 18
the cuttings which have collected on the exterior side of the cuttings
basket 18 the exhaust system is provided with at least one cleaning
unit 23. It has a cleaning nozzle 24 which projects into the cuttings
basket 18 and which is provided with a nozzle opening 24 (not illustrated)
from which a cleaning medium emerges in a way to be described in
the following. The cleaning nozzle 24 is supported in a holder 26
so as to be rotatable about its axis 25 (FIG. 3); the holder projects
through the base plate 12 and is connected to the base plate. The
cleaning unit 23 is provided in an area between the exhaust socket
16 and a corner area of the base plate 12. The axis of rotation
25 of the cleaning nozzle 24 is positioned perpendicularly to the
base plate 12.
[0027] A supply line 27 is connected to the holder 26 and a cleaning
medium, preferably, a cooling lubricant, is supplied via the supply
line. A solenoid valve 28 is positioned in the supply line 27 for
controlling the supply of the cleaning medium. The solenoid valve
28 is electrically controlled in order to open or close the supply
line 27. Instead of the solenoid valve 28 it is also possible to
provide a manually operated valve.
[0028] When a cleaning process is to be performed, the solenoid
valve 28 is actuated and the supply line 27 opened. In this way,
the cleaning medium can be supplied to the cleaning unit 23. Under
the pressure of the supplied cleaning medium, which reaches the
cleaning nozzle 24 via the holder 26 the nozzle is rotated about
its axis 25. Via the nozzle openings provided at the lower end of
the cleaning nozzle 24 the cleaning medium exits and is thrown
against the sidewalls 19 to 21 and the bottom 22 of the cuttings
basket 18. By means of the cleaning medium, which impacts from the
inner side the sidewalls 19 to 21 and the bottom 22 of the cuttings
basket 18 the cuttings adhering to it are thrown back inwardly
into the machine enclosure.
[0029] Depending on the size of the cuttings basket 18 it is possible
to provide more than one cleaning unit 23.
[0030] By means of the cleaning unit 23 the sidewalls 19 to 21
and the bottom 22 of the cuttings basket 18 can be flushed to free
them so that clogging of the cuttings basket 18 by means of cuttings
generated by workpiece machining can be reliably prevented. For
cleaning the cuttings basket 18 it is not required to have personnel
because the cleaning of the cutting basket 18 can be carried out
automatically in the described way. Even when the enclosure of the
machine tool is tall and the exhaust system is mounted on the ceiling
of the enclosure, a reliable cleaning of the cuttings basket 18
is ensured. Since cleaning of the cuttings basket 18 is carried
out without personnel, the machine tool positioned within the enclosure
must not be shut down for the cleaning operation. Cleaning of the
cuttings basket 18 can be carried out optimally as soon as the exhaust
output/effect decreases. In this way, a continuous exhaust efficiency/effect
with continuous under pressure in the working space within the enclosure
of the machine tool is ensured. The cleaning medium, in particular,
cooling lubricant, does not reach the machine surroundings so that
even in the surrounding areas of the enclosure there is no atmosphere
that would present a health hazard.
[0031] Since the mounting frame 3 of the exhaust system is formed
by angled profiled sections, it can be attached to and detached
from the enclosure 1 in a simple way; also, in particular, because
of the two handles 13 and 14. This is a great advantage for servicing
purposes and for possible modifications. Because of the described
configuration, the exhaust system has three interfaces, i.e., for
the cuttings basket 18 for the cleaning unit 23 and for the exhaust
socket 16. These three interfaces are mounted in a space-saving
way on the exhaust system.
[0032] In FIGS. 1 and 3 a conventional exhaust socket 16 is provided
which is connected to the exhaust pipe in a way known in the art.
[0033] FIGS. 4 and 5 show an exhaust socket 16 to which a flexible
hose 29 can be connected in a simple way. On the connecting end
34 of the hose 29 a clamping ring 31 is attached which is embodied
as a spring ring and, for generating the spring properties, is provided
with a slot 32. The clamping ring 31 is surrounded by a clamping
device 33 which is formed, for example, as a hose clamp.
[0034] In order to prevent sliding of the clamping ring 31 on the
hose 29 it is advantageously configured such that it is seated
with a high clamping force on the hose end 34. Of course, it is
also possible to connect the clamping ring 31 fixedly to the hose
end 34.
[0035] Advantageously, the end 35 of the clamping ring 31 facing
the exhaust socket 16 is folded inwardly in a U-shape. This has
the advantage that the hose end 34 can be inserted simply to such
an extent into the clamping ring 31 until the free hose end contacts
the bottom 41 of the folded portion 35. In this way, it is ensured
that the hose end 34 is inserted sufficiently far into the clamping
ring 31.
[0036] Near the free end, at least one positive-locking element
36 is fastened on the clamping ring which, in the illustrated embodiment,
is a ring having a cross-section that is approximately semi-circular
and interrupted in the area of the slot 32. This positive-locking
element 36 is advantageously a metal ring which is welded onto the
peripheral surface of the clamping ring 31. The positive-locking
element 36 must not be formed as a ring. It can be, for example,
in the form of individual sections which in the circumferential
direction of the clamping ring 31 are positioned at a distance from
one another. The positive-locking element 36 serves for reliably
securing the hose 29 axially fixedly on the exhaust socket 16 in
the mounted position. Accordingly, the positive-locking element
36 is configured such that it can reliably perform this axial securing
function.
[0037] Since in the preferred embodiment the positive-locking element
in cross-section has a curved exterior, it can be moved easily into
the mounting position during the attachment process of the hose
29 on the exhaust socket 16.
[0038] At a spacing from its free end face 37 the exhaust socket
16 has in its inner wall 38 a positive-locking counter element 39
which is engaged positive-lockingly by the positive-locking element
36 in the mounted position of the hose 29. When the positive-locking
element 36 is a ring, the positive-locking counter element 39 is
an annular groove in the inner wall 38 of the socket 16. The cross-sectional
shape of the positive-locking counter element 39 is matched to the
cross-sectional shape of the positive-locking element 36 so that
the positive-locking element in the mounted position rests areally
against the wall of the positive-locking counter element 39.
[0039] The clamping ring 31 relative to its outer diameter, is
configured such that it can be inserted into the socket 16 only
in the compressed state. For this purpose, the clamping ring 31
is elastically compressed by the clamping device 33 to such an extent
that it can be inserted with the positive-locking element 36 into
the socket 16. When the clamping device 33 is a hose clamp, the
clamping ring 31 can be reduced continuously to any required diameter.
Advantageously, the clamping ring 31 is compressed elastically to
such an extent that the positive-locking element 36 upon insertion
rests against the inner wall 38 of the socket 16. In this way, the
hose end 34 can be inserted without problems until the positive-locking
element 36 is at the level of the positive-locking counter element
39. The clamping device 33 is released again so that the clamping
ring 31 is elastically widened. When doing so, the positive-locking
element 36 moves into the positive-locking counter element 39.
[0040] The clamping ring 31 is configured such that in the mounted
position it rests at a high pressing force against the inner wall
38 of the socket 16. The slot 32 is so wide that the clamping ring
31 can be compressed elastically sufficiently in order to insert
it together with the positive-locking element 36 into the socket
16.
[0041] In order to simplify the connecting action of the hose 29
on the socket 16 the clamping device 32 is advantageously fastened
on the clamping ring 31 such that it comes into contact with the
end face 37 of the socket 16 when the positive-locking element 36
is at the level of the positive-locking counter element 39. Then
it is only necessary during mounting to release the clamping device
33 so that the positive-locking element 36 as a result of the radial
elastic widening of the clamping ring 31 moves into the positive-locking
counter element 39 of the socket 16. Advantageously, the clamping
device 33 is completely released so that the clamping ring 31 rests
at a high clamping force against the wall 38 of the socket 16.
[0042] Since the hose 29 with its lower end 34 rests against the
bottom 41 of the folded portion 35 of the clamping ring 31 escaping
of the sucked-in medium through the slot 32 is reliably prevented.
With this configuration, escaping of the removed medium and a return
flow is prevented when the exhaust device is switched off.
[0043] In the described embodiment, the clamping force by which
the clamping ring 31 is forced against the inner wall 38 of the
socket 16 is derived from the spring force of the clamping ring
31 itself. However, it is also possible to configure the clamping
ring 31 and the clamping device 33 such that the clamping force
can be adjusted in the mounted position of the clamping ring 31.
This is achieved in that the fastening device 33 is attached to
the clamping ring 31. As a result of the fixed connection, the clamping
ring 31 is widened or compressed mandatorily by the clamping device
33 when the clamping device 33 is actuated.
[0044] In the initial position, the clamping ring 31 and the positive-locking
element 36 are configured such the clamping ring can be inserted
into the socket 16. In contrast to the preceding embodiment, the
clamping ring 32 is now widened with the clamping device 33. The
positive-locking element 36 reaches in this way the positive-locking
counter element 39. By means of the clamping device 33 the pressing
force with which the clamping ring 31 rests against the inner wall
38 of the socket 16 can thus be adjusted to the respective mounting
conditions, in particular, the pressing force can be readjusted
anytime.
[0045] The clamping device 33 is preferably configured as a hose
clamp where, by means of a clamping screw 40 a hose clamp can be
widened or compressed in a way known in the art.
[0046] In the described second embodiment, the hose clamp 33 has
its smallest diameter in the initial state. As soon as the clamping
ring 31 is inserted into the socket 16 the hose clamp 33 is widened
by actuation of the adjusting screw 40 as is known in the art. Since
the clamping ring 31 is fastened on the hose clamp 33 the clamping
ring 31 is widened accordingly.
[0047] In the first embodiment, in which the hose clamp 33 is not
fixedly connected with the clamping ring 31 the hose clamp 33
before insertion of the clamping ring 31 into the socket 16 has
a correspondingly small diameter. For attachment of the clamping
ring 31 in the socket 16 the hose clamp 33 is then widened by actuation
of the adjusting screw 40. The clamping ring 31 is also elastically
widened correspondingly.
[0048] The exhaust system has been described in connection with
an enclosure of a machine tool. The exhaust system can also be used
anywhere where exhausting of rooms, devices, other machines and
the like must be performed.
[0049] In the exhaust system, it is possible to eliminate the cuttings
basket 18 when, for example, no cuttings are generated by using
the machine tool. This is, for example, the case when within the
housing-type enclosure 1 grinding processes are performed. By means
of the exhaust device, air is exhausted also in this situation from
the interior of the enclosure. The grinding dust generated during
grinding is then entrained in the airflow and reliably removed from
the interior of the enclosure.
[0050] The cleaning unit 23 in deviation from the illustrated
embodiment, can also have a stationery cleaning nozzle 24 which
does not rotate about its axis. In this case, about the circumference
of the cleaning nozzle several nozzle openings are provided via
which the cleaning medium can be expelled. In order to be able to
reach all sidewalls and also the bottom of the cuttings basket 18
with the cleaning medium, it is advantageous when the cleaning nozzle
projects centrally into the cuttings basket 18. The nozzle openings
are provided on the cleaning nozzle 24 such that the sidewalls 19
to 21 as well as the bottom 22 of the cuttings basket 18 are completely
within reach of the cleaning medium.
[0051] It is moreover possible to provide several such cleaning
units 23. For example, each sidewall 19 to 21 and/or the bottom
22 of the cuttings basket 18 can have correlated therewith a cleaning
unit, respectively.
[0052] FIG. 6 shows an embodiment in which the hose 29 with its
connecting end 34 is inserted into a sleeve-shaped plug-in receptacle
42 and is fastened thereto. The plug-in receptacle 42 has a sleeve
section 43 widened with respect to the inner and outer diameters
into which the connecting end 34 is inserted. The hose 29 is positioned
with its end face 34 on an annular shoulder 44 which is formed at
the transition from the sleeve section 43 at the end into an insertion
section 45 of the plug-in receptacle 42. The outer diameter of the
connecting end 34 of the hose 29 is smaller than the inner diameter
of the sleeve section 43. Into the annular space 46 formed in this
way, a sealing compound is introduced by which the hose 29 is fixedly
connected to the plug-in receptacle 42.
[0053] The plug-in receptacle 42 is inserted with its plug-in section
45 into the exhaust socket 16 until the plug-in receptacle 42 contacts
with its annular shoulder 44 the exhaust socket 16.
[0054] As shown in FIG. 7 the exhaust socket 16 is provided on
diametrically opposed sides with suspension brackets 47 of which
only one is shown in FIG. 7. Clamping levers (not illustrated) are
suspended therefrom, as is known in the art, which are supported
pivotably on the outer side of the plug-in receptacle 42. Upon insertion
of these clamping levers into the suspension brackets 47 and clamping
action, the plug-in receptacle 42 is clamped with its annular shoulder
44 against the end face of the exhaust socket 16. Such quick clamping
devices are known and, therefore, will not be explained in more
detail in this connection. By means of these quick-clamping closures,
the hose 29 can be quickly mounted and detached.
[0055] The entire exhaust system can be inserted very easily into
the mounting opening 2 of the enclosure as well as removed from
it. For this purpose, the exhaust system has on two opposed sides
slidable clamping bars 48 49 and 50 51 (FIGS. 1 3 and 7) which
can be moved relative to one another. The slidable clamping bars
48 to 51 are arranged on the base plate 12 adjacent to the angled
edges 8 10 of the mounting frame 3. The slidable clamping bars
48 to 51 are, for example, formed as approximately U-shaped profile
sections which overlap one another telescopingly. In the area in
which they are overlapped by the slidable clamping bars 48 50
the slidable clamping bars 49 51 are provided with an opening (not
illustrated) extending in the longitudinal direction; a wing screw
52 53 projects through the opening and clamps the two slidable
clamping bars relative to one another in the clamping position.
At their ends facing away from one another, the slidable clamping
bars 48 to 51 are provided with two parallel clamping stays 54
55 which project past them in the sliding direction, are arranged
upright, and advantageously are monolithic parts of the sliding
clamping bar, respectively.
[0056] After loosening the screws 52 53 the slidable clamping
bars can be moved on the base plate 12 to such an extent that the
clamping stays 54 55 are retracted and do not project past the
sidewalls 56 57 by which the base plate 12 is connected with the
angled edges 9 11 of the mounting frame 2. As illustrated in FIG.
7 two slot-shaped openings 58 59 are provided in the sidewall
56 for allowing penetration of the clamping stays 54 through which
the clamping stays 54 project in the clamping position. The opposite
sidewall 57 is also provided with corresponding slot-shaped openings
(not illustrated) for the clamping stays 55 of the slidable clamping
bars 48 50.
[0057] In the position illustrated in FIG. 7 the slidable clamping
bars 48 to 51 are retracted to such an extent that the clamping
stays 54 55 do not project past the sidewalls 56 57. In this way,
the mounting frame 3 can be inserted simply into the mounting opening
2 of the enclosure 1 such that the mounting frame 3 rests with the
outwardly angled edges 8 to 11 on the rim of the mounting opening
2. Subsequently, the slidable clamping bars 48 to 51 are moved outwardly
relative to one another such that the clamping stays 54 55 project
through the slot-shaped openings 58 59 in the sidewalls 56 57.
By means of these clamping stays 54 55 the rim of the mounting
opening 2 is engaged from below and, in this way, the entire exhaust
system is safely secured against being lifting from the enclosure
1. The clamping stays 54 55 are provided such that the mounting
frame 3 with its angled edges 8 to 11 are pulled tightly against
the exterior side of the rim of the mounting opening 2. Advantageously,
the end face of the clamping stays 54 55 facing the mounting opening
2 of the enclosure 1 extend at a slant or are rounded so that tolerances
can be compensated effortlessly when tightening the exhaust system
on the enclosure 1. After securing the exhaust system, the screws
52 53 are tightened so that the slidable clamping bars 48 to 51
are clamped against one another and can no longer be pushed back
into the release position.
[0058] When the exhaust system is to be demounted, only the wing
screws 52 53 must be released and the sliding clamping bars 48
to 51 must be pushed back to such an extent that the clamping stays
54 55 no longer project past the sidewalls 56 57 of the mounting
frame 3. By means of the two handles 13 14 the exhaust system
can be lifted effortlessly.
[0059] The exhaust system with the cuttings basket 18 prevents
the cuttings from being exhausted. Without the exhaust system the
cuttings which have been sucked in would form nests of cuttings
within the suction hose or would deposit within the exhaust device.
This would result in an increased servicing expenditure, in an increased
fire risk when using cooling lubricants as cleaning medium, in a
limited return flow of the cooling lubricant, in additional resistance
of the airflow, and would cause operational disruptions. By employing
the cuttings basket 18 these advantages are reliably prevented
in a constructively simple way. The mesh of the cuttings basket
18 can have a wire diameter of, for example, 0.8 mm and a mesh width
of, for example, 2.5 mm. Depending on the type of application of
the cuttings basket 18 other dimensions can be provided also. The
cuttings basket 18 can be reliably and even permanently cleaned
by means of the cleaning unit 23.
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