CA2241822A1 - Method for purging and cleaning of recesses of at least one workpiece - Google Patents
Method for purging and cleaning of recesses of at least one workpiece Download PDFInfo
- Publication number
- CA2241822A1 CA2241822A1 CA002241822A CA2241822A CA2241822A1 CA 2241822 A1 CA2241822 A1 CA 2241822A1 CA 002241822 A CA002241822 A CA 002241822A CA 2241822 A CA2241822 A CA 2241822A CA 2241822 A1 CA2241822 A1 CA 2241822A1
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- nozzle
- containers
- workpiece
- container
- gas
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B5/00—Cleaning by methods involving the use of air flow or gas flow
- B08B5/02—Cleaning by the force of jets, e.g. blowing-out cavities
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- Cleaning In General (AREA)
Abstract
The present invention relates to a method for purging and cleaning of recesses (29) in at least one workpiece (25), in particular blind holes, holes, bores and threaded bores, with a gas, in particular air, which comes from the compressed-air source (11a). The gas is compressed in at least one container (9) to a preset pressure and the gas compressed in the container (9) is subsequently expanded into at least one recess (29) of the workpiece (25) to remove foreign bodies, in particular chips, from said recess (29).
Description
Method for blowing out and cleaning recesses in at least one workpiece The present invention relates to a method for blowing out and cleaning recesses in at least one workpiece, in particular blind holes, holes, drilled holes and threaded holes, using a gas, in particular air, which originates from a compressed-air source, the gas being compressed to a prede-termined pressure in at least one container.
Nowadays, cast housings, which have a multiplicity of passages, drilled holes, blind holes, threaded holes and the like following machining in CNC machining centers, are cleaned. The cleaning of the workpieces is carried out by means of washing machines that are specifically suited for this, it being subsequently necessary, following such cleaning, for the machined workpieces to be reworked. In particular, precise passages, blind holes, threaded holes and the like must be freed from contaminants and, in particular, swarf, which cannot be removed by the washing machine.
Hitherto, such blind holes, drilled holes and passages were cleaned of swarf and contaminants by hand by means of compressed air and compressed-air guns. Each individual recess had to be blown out by hand. In the case of this conventional cleaning method, it is disadvantageous that AMENDED SHEET
during the process of blowing out using a nozzle and compressed air, a very loud noise, which is damaging to the health of persons in the adjacent environment, is produced and, in addition, any remaining contaminants and, in par-ticular, swarf are shot out of blind holes, and as a result constitute a hazard to the operator, in particular to his eyes.
A further disadvantage is that the blowing out of recesses, such as blind holes, threaded holes or the like, must be carried out very carefully in order, on the one hand, to dispense with renewed subsequent testing and, on the other hand, not to damage parts later during the assembly or in operation as a result of residual contaminants, in particular swarf. It has been shown that blowing out by hand is very costly, since each individual recess has to be blown out by hand by means of compressed air and a gun. It is often the case that one or another recesses are forgotten, so that when the fault appears, a complete series has to be checked again and reworked.
US 5,054,155 discloses a device in which a workpiece is clamped on a wheel which travels to individual machining stations. At one station, the workpiece is shaken, at the next station it is blown out using a plurality of nozzles. In this case, the nozzles are connected to a common AMENDED SHEET
compressed-air supply container.
According to DE 80 19 194, a device for cleaning workpieces is known, a plurality of nozzles projecting from a device above a conveyor belt and being aligned with individual depressions, drilled holes or blind holes. These individual nozzles are fed from a compressed-air source via a common line.
DE 25 94 805 discloses a device for cleaning blind drilled holes, a plurality of nozzles that are arranged in a holder being fed via a common feed line in said holder. These nozzles are then arranged above corresponding bores of blind holes, in order to blow out the latter.
The present invention is based on the object of eliminating the above-mentioned disadvantages and of provid-ing a method and a device which permit the residue-free cleaning and, in particular, blowing out of recesses, it also being possible for a multiplicity of workpieces and recesses in a workpiece to be worked on. In addition, time and costs during the cleaning and blowing out of recesses in workpieces, in particular castings, are to be reduced con-siderably.
This object is achieved by the gas from a single container or a plurality of containers, which are filled and each connected to a single nozzle, subsequently being AMENDED SHEET
-3a-expanded into a recess in the workpiece in order to remove contaminants, in particular swarf, from the recess.
This invention permits recesses, in particular blind holes, holes or drilled holes in castings to be blown out using higher pressure and cleaned of swarf and contaminants via a multiplicity of nozzles that are arranged in a perforated metal sheet.
In order that this high pressure is available for a multiplicity of nozzles, individual containers, particularly containers designed as pressure containers, are filled with gas, in particular air, and the latter is compressed. Each container, which is filled up via a control valve, is preferably connected to a single nozzle, via a valve that is assigned to the container.
In this arrangement, the nozzles are inserted in any desired manner into a perforated metal sheet, which is arranged in a housing via columns such that its height is adjustable. A workpiece, which has recesses, in particular drilled holes, threaded holes or the like, can be clamped on the perforated metal sheet by means of workpiece holders.
This workpiece is intended to be cleaned of contaminants.
In order that the nozzles and, in particular, the nozzle attachments are aligned with the recesses in the workpiece, they may be constructed so as to be flexible and, AMENDED SHEET
preferably, able to be bent. It is preferable if materials such as aluminum, copper or the like are used for the nozzles or nozzle attachments. In order that the alignment of the nozzle attachments is carried out quickly and easily, the recesses are located with the aid of a template, following which the nozzle attachments can be aligned to said recesses easily and quickly.
A housing for the device preferably has rectangular to square forms. For reasons of stability and costs, a multiplicity of containers arranged alongside one another form the frame of the housing, side and end walls projecting from this frame. Toward the top, the housing is closed by a lid, which may, in particular, have sound-insulating materials or insulating elements on the inside. Furthermore, four guide columns are arranged in the housing on the inside, the perforated metal sheet preferably being arranged on these guide columns so that it can be folded up in a manner corresponding to the lid. A collecting tray located beneath collects the swarf and contaminants that fall down and which, after the perforated metal sheet has been folded up, can be removed, for example by an industrial vacuum cleaner.
Furthermore, thought is given to constructing the guide columns with the perforated metal sheet to be height-adjustable for workpieces of different thicknesses.
However, it is also important that the housing can be moved via rollers which, if appropriate, are arranged on the frame in such a way that they can be rotated and fixed.
It is then possible for this device to be transported to different machining centers and connected at any point to the conventional compressed-air system, in order, for example, to clean the machined workpieces, in particular castings.
A further significant advantage of the present invention is that the device can be used universally and, above all, can be equipped individually for all conceivable parts.
However, it is also conceivable here for, for example, the nozzles or nozzle attachments to be assigned to the workpiece, in particular to the recesses of the latter, via lateral vertical metal sheets. It is also possible for a plurality of workpieces to be worked on at the same time, if these are clamped on the perforated metal sheet in a plurality of workpiece holders.
A particularly effective configuration of the invention is provided if a plurality of control valves are arranged on a central manifold in the interior of the housing. It is possible for any number of containers to be connected to each control valve, these containers being filled with air via a specific valve that is assigned to the container. Once the containers have been filled up, then on a specific signal from the control valve the valve on the container is opened and a connection between container and nozzle is switched through, so that the entire compressed content of air is abruptly output to the nozzle.
Since the individual nozzles, in particular their nozzle attachments, are aligned toward the recesses in the workpiece, the recesses are cleaned of swarf quickly in a simple way. The swarf falls into the collecting tray through the holes arranged in the perforated metal sheet. In the tray, said swarf can then be removed.
While the containers that are connected to a control valve are being discharged, or the air is flowing out, it is possible for further containers that are connected to a further control valve to be filled with air during this time. When these containers are also filled, it is possible for them likewise to be expanded on a further signal from the control valve, and for the air to be abruptly output to appropriately connected nozzles.
The advantage of the present invention is that any number of containers can be connected to at least one or a plurality of control valves, so that a precisely definable and determinable number of nozzles feed air at high pressure to the recesses abruptly and in different sequences.
It also lies within the scope of the present inven-tion for a time progression or time sequence of the compres-sion of air and discharge or expansion of the air from the container to the nozzle to be regulated, for example via a further control device, to which the control valves are connected. Repeatedly charging up and outputting the air to the individual nozzles is also possible here. This regulation is preferably carried out pneumatically.
It is precisely in mass production that this inven-tive device is used very economically, since the time during which a workpiece is being machined by a machining center can be used for the cleaning and decontamination and, in particular, for blowing out recesses in parts already produced.
Of course, it is also within the scope of the invention for side parts, end walls and the lid to be lined with insulating material, in order to attenuate machining noises greatly.
The air discharged from the nozzles flows out laterally and is led through the housing to the bottom, where it emerges. Of course, it is also possible for insulating mats and, in particular, filter mats to be provided there.
Thought should also be given here to safety mechan-isms, so that, for example, when the lid is opened, blowing out and expansion of air from a container or a nozzle is prevented.
Further advantages, features and details of the invention emerge from the following description of preferred exemplary embodiments and with reference to the drawing, in which:
Figure 1 shows a front view, illustrated schemati-cally, of an inventive device for blowing out cavities;
Figure 2 shows a plan view of the device according to Figure l;
Figure 3 shows a perspective illustration of the device according to Figure l;
Figure 4 shows a block-diagram illustration of the control of the device according to Figure l;
Figure 5 shows a block-diagram illustration of a further exemplary embodiment of the control of the device according to Figure 4.
According to Figure 1, an inventive device R has a housing 1 with side walls 2, 3 and end walls 2.1, 3.1 (Fig.
Nowadays, cast housings, which have a multiplicity of passages, drilled holes, blind holes, threaded holes and the like following machining in CNC machining centers, are cleaned. The cleaning of the workpieces is carried out by means of washing machines that are specifically suited for this, it being subsequently necessary, following such cleaning, for the machined workpieces to be reworked. In particular, precise passages, blind holes, threaded holes and the like must be freed from contaminants and, in particular, swarf, which cannot be removed by the washing machine.
Hitherto, such blind holes, drilled holes and passages were cleaned of swarf and contaminants by hand by means of compressed air and compressed-air guns. Each individual recess had to be blown out by hand. In the case of this conventional cleaning method, it is disadvantageous that AMENDED SHEET
during the process of blowing out using a nozzle and compressed air, a very loud noise, which is damaging to the health of persons in the adjacent environment, is produced and, in addition, any remaining contaminants and, in par-ticular, swarf are shot out of blind holes, and as a result constitute a hazard to the operator, in particular to his eyes.
A further disadvantage is that the blowing out of recesses, such as blind holes, threaded holes or the like, must be carried out very carefully in order, on the one hand, to dispense with renewed subsequent testing and, on the other hand, not to damage parts later during the assembly or in operation as a result of residual contaminants, in particular swarf. It has been shown that blowing out by hand is very costly, since each individual recess has to be blown out by hand by means of compressed air and a gun. It is often the case that one or another recesses are forgotten, so that when the fault appears, a complete series has to be checked again and reworked.
US 5,054,155 discloses a device in which a workpiece is clamped on a wheel which travels to individual machining stations. At one station, the workpiece is shaken, at the next station it is blown out using a plurality of nozzles. In this case, the nozzles are connected to a common AMENDED SHEET
compressed-air supply container.
According to DE 80 19 194, a device for cleaning workpieces is known, a plurality of nozzles projecting from a device above a conveyor belt and being aligned with individual depressions, drilled holes or blind holes. These individual nozzles are fed from a compressed-air source via a common line.
DE 25 94 805 discloses a device for cleaning blind drilled holes, a plurality of nozzles that are arranged in a holder being fed via a common feed line in said holder. These nozzles are then arranged above corresponding bores of blind holes, in order to blow out the latter.
The present invention is based on the object of eliminating the above-mentioned disadvantages and of provid-ing a method and a device which permit the residue-free cleaning and, in particular, blowing out of recesses, it also being possible for a multiplicity of workpieces and recesses in a workpiece to be worked on. In addition, time and costs during the cleaning and blowing out of recesses in workpieces, in particular castings, are to be reduced con-siderably.
This object is achieved by the gas from a single container or a plurality of containers, which are filled and each connected to a single nozzle, subsequently being AMENDED SHEET
-3a-expanded into a recess in the workpiece in order to remove contaminants, in particular swarf, from the recess.
This invention permits recesses, in particular blind holes, holes or drilled holes in castings to be blown out using higher pressure and cleaned of swarf and contaminants via a multiplicity of nozzles that are arranged in a perforated metal sheet.
In order that this high pressure is available for a multiplicity of nozzles, individual containers, particularly containers designed as pressure containers, are filled with gas, in particular air, and the latter is compressed. Each container, which is filled up via a control valve, is preferably connected to a single nozzle, via a valve that is assigned to the container.
In this arrangement, the nozzles are inserted in any desired manner into a perforated metal sheet, which is arranged in a housing via columns such that its height is adjustable. A workpiece, which has recesses, in particular drilled holes, threaded holes or the like, can be clamped on the perforated metal sheet by means of workpiece holders.
This workpiece is intended to be cleaned of contaminants.
In order that the nozzles and, in particular, the nozzle attachments are aligned with the recesses in the workpiece, they may be constructed so as to be flexible and, AMENDED SHEET
preferably, able to be bent. It is preferable if materials such as aluminum, copper or the like are used for the nozzles or nozzle attachments. In order that the alignment of the nozzle attachments is carried out quickly and easily, the recesses are located with the aid of a template, following which the nozzle attachments can be aligned to said recesses easily and quickly.
A housing for the device preferably has rectangular to square forms. For reasons of stability and costs, a multiplicity of containers arranged alongside one another form the frame of the housing, side and end walls projecting from this frame. Toward the top, the housing is closed by a lid, which may, in particular, have sound-insulating materials or insulating elements on the inside. Furthermore, four guide columns are arranged in the housing on the inside, the perforated metal sheet preferably being arranged on these guide columns so that it can be folded up in a manner corresponding to the lid. A collecting tray located beneath collects the swarf and contaminants that fall down and which, after the perforated metal sheet has been folded up, can be removed, for example by an industrial vacuum cleaner.
Furthermore, thought is given to constructing the guide columns with the perforated metal sheet to be height-adjustable for workpieces of different thicknesses.
However, it is also important that the housing can be moved via rollers which, if appropriate, are arranged on the frame in such a way that they can be rotated and fixed.
It is then possible for this device to be transported to different machining centers and connected at any point to the conventional compressed-air system, in order, for example, to clean the machined workpieces, in particular castings.
A further significant advantage of the present invention is that the device can be used universally and, above all, can be equipped individually for all conceivable parts.
However, it is also conceivable here for, for example, the nozzles or nozzle attachments to be assigned to the workpiece, in particular to the recesses of the latter, via lateral vertical metal sheets. It is also possible for a plurality of workpieces to be worked on at the same time, if these are clamped on the perforated metal sheet in a plurality of workpiece holders.
A particularly effective configuration of the invention is provided if a plurality of control valves are arranged on a central manifold in the interior of the housing. It is possible for any number of containers to be connected to each control valve, these containers being filled with air via a specific valve that is assigned to the container. Once the containers have been filled up, then on a specific signal from the control valve the valve on the container is opened and a connection between container and nozzle is switched through, so that the entire compressed content of air is abruptly output to the nozzle.
Since the individual nozzles, in particular their nozzle attachments, are aligned toward the recesses in the workpiece, the recesses are cleaned of swarf quickly in a simple way. The swarf falls into the collecting tray through the holes arranged in the perforated metal sheet. In the tray, said swarf can then be removed.
While the containers that are connected to a control valve are being discharged, or the air is flowing out, it is possible for further containers that are connected to a further control valve to be filled with air during this time. When these containers are also filled, it is possible for them likewise to be expanded on a further signal from the control valve, and for the air to be abruptly output to appropriately connected nozzles.
The advantage of the present invention is that any number of containers can be connected to at least one or a plurality of control valves, so that a precisely definable and determinable number of nozzles feed air at high pressure to the recesses abruptly and in different sequences.
It also lies within the scope of the present inven-tion for a time progression or time sequence of the compres-sion of air and discharge or expansion of the air from the container to the nozzle to be regulated, for example via a further control device, to which the control valves are connected. Repeatedly charging up and outputting the air to the individual nozzles is also possible here. This regulation is preferably carried out pneumatically.
It is precisely in mass production that this inven-tive device is used very economically, since the time during which a workpiece is being machined by a machining center can be used for the cleaning and decontamination and, in particular, for blowing out recesses in parts already produced.
Of course, it is also within the scope of the invention for side parts, end walls and the lid to be lined with insulating material, in order to attenuate machining noises greatly.
The air discharged from the nozzles flows out laterally and is led through the housing to the bottom, where it emerges. Of course, it is also possible for insulating mats and, in particular, filter mats to be provided there.
Thought should also be given here to safety mechan-isms, so that, for example, when the lid is opened, blowing out and expansion of air from a container or a nozzle is prevented.
Further advantages, features and details of the invention emerge from the following description of preferred exemplary embodiments and with reference to the drawing, in which:
Figure 1 shows a front view, illustrated schemati-cally, of an inventive device for blowing out cavities;
Figure 2 shows a plan view of the device according to Figure l;
Figure 3 shows a perspective illustration of the device according to Figure l;
Figure 4 shows a block-diagram illustration of the control of the device according to Figure l;
Figure 5 shows a block-diagram illustration of a further exemplary embodiment of the control of the device according to Figure 4.
According to Figure 1, an inventive device R has a housing 1 with side walls 2, 3 and end walls 2.1, 3.1 (Fig.
2). The side walls 2, 3 and the end walls 2.1, 3.1 form a preferably cuboidal housing 1, which can be closed at the top by a lid 4 that can be folded open. In order that the lid 4 remains in an opened position, it is assigned at least one gas spring 5, which at the other end is connected to the housing 1. When the lid 4 is moved downward, it closes an opening 6. The lid 4 can be fixed with respect to the housing _ g_ 1 by means of a bolt 7.
Toward the bottom, the housing 1 is opened within a frame 8, as illustrated in Figure 3. The frame 8 comprises a multiplicity of individual containers 9, which are connected to one another, for example welded, and which in each case are constructed as pressure containers. Of course, it is also within the scope of the invention for the containers 9 to be inserted into the housing 1 in a different arrangement. The containers 9 are preferably constructed to be like cubes and partitioned off from one another. They have an opening, not shown specifically here, into which a valve 10 is inserted in each case.
Compressed air from a compressed-air source lla is fed to the device R from the outside via a line 11 and, as illustrated in Figures 2 and 3, said air is led into the interior of the housing 1 through a dewatering unit 12 and adjacent filter 13. In the interior of the housing, the line 11 reaches a manifold 14, which distributes the air to a plurality of control valves 15. A plurality of containers 9 are connected to each control valve 15 via valves 10.
Furthermore, each container 9 or each valve 10 is connected to at least one nozzle 17 via a line 16.
The nozzles 17 can be inserted in any desired manner into a perforated metal sheet 18, which is inserted into the housing 1 in the manner illustrated. The perforated metal sheet 18 is preferably fixed via a hinge 19 to guide columns 20 so that it can be folded and, at the other end, rests on a further guide column 21 and can be fixed there by means of a fastening element 22. In order to fold the perforated metal sheet 18 upward, said sheet being mounted on the guide columns 20 so that it can rotate about the hinge 19, it is necessary for the fastening elements 22 to be released. Here, too, thought is given to holding the perforated metal sheet 18 in an upwardly folded position, corresponding to the lid 4, via gas springs, which are not illustrated here.
Underneath the perforated metal sheet 18, a collecting tray 23 is arranged in a similar way in the housing 1. The perforated metal sheet 18 and the collecting tray 23 are arranged on the guide columns 20, 21 so that their height can be adjusted.
It is possible to fasten to the perforated metal sheet 18 any number of workpiece holders 24, which are able to hold a workpiece 25, preferably at a distance from the perforated metal sheet 18. Via clamping devices, clamping brackets or similar elements, not shown here, the workpiece 25 can be rereleasably fixed to the workpiece holders 24.
In order that the device R can be used flexibly with respect to location, said device is preferably assigned rotatable and fixable rollers 26 on the frame 8 of the housing 1.
In order that the device R operates with low noise levels, sound insulation 27, indicated by dashed lines, is provided within the lid 4. It is also possible for sound-insulating materials to be provided on the inside on the side walls 2, 3 and end walls 2.1, 3.1.
The functioning of the present invention is as follows.
Air is fed to the device R from the outside via the line 11, the air being dewatered in the dewatering device 12 and subsequently being cleaned by the very fine filter 13.
From the filter 13, the compressed air is fed to the manifold 14 and, uniformly distributed, passed on to a plurality of control valves 15. This can be seen, in particular, in Figure 4.
The control valve 15 is connected to a multiplicity of containers 9 and, in particular, to their valves 10, each valve 10 being connected in each case via a line 16 to a nozzle 17 that is inserted into the perforated metal sheet 18. The nozzles 17 can be inserted in any desired distribution in any holes in the perforated metal sheet 18.
The compressed air is distributed from the control valve 15 to all the containers 9 that are connected to the control valve 15, and is compressed in said containers, until a specific pressure ha~ been built up. During the charging of the containers 19 with compressed air, the connection between valve 10, line 16 and nozzle 17 remains closed. When the containers 9 have reached a specific pressure after a specific time, then, in response to a specific signal from the control valve 15, for example by means of a vacuum, the valve 10 can be shut off in the direction of the control valve 15, at the same time a connection between container 9 and nozzle 17 via the line 16 being opened and the compressed air emerging from the nozzles 17 at a high velocity.
Since the compressed air, which is supplied via the line 11 via a conventional compressed-air system, is not available in such great quantities, air is compressed in each container 9 that is connected to the control valve 15. While air is flowing out of the container 9, via the line 16 and out of the nozzle 17, no air is supplied to the container 9 via the control valve 15.1. In this case, while the air is flowing out, a further control valve 15.2 is supplied with air in a manner corresponding to that described above, further valves 10 with containers 9 being connected to said further control valve 15.2 and likewise being able to supply nozzles 17 with compressed air following its compression in the container 9.
However, it is also significant in the present invention that the air that is compressed in the container 9 flows out of the nozzle 17 abruptly via the line 16, the air being guided into recesses 29 in the workpiece 25 via a nozzle attachment 28, if appropriate a flexible nozzle attachment 28, which is placed onto the nozzle 17. The blowing out of these recesses 29 is thus performed under very high pressure using a large volume of air. If a plurality of containers are filled with air, it is possible for a multiplicity of recesses, in particular blind holes, threaded holes or the like, to be freed from contaminants and, in particular, swarf.
The alignment of the nozzles 17 and, in particular, of the nozzle attachments 28 is carried out by means of a template, which, for example, can be produced from Plexiglas, on which the recesses 29 in a workpiece are drawn and with which the corresponding nozzle attachments can then be aligned. After this, a multiplicity of recesses 29 in a workpiece 25 can be cleaned of contaminants in one operation.
These contaminants fall through the perforated metal sheet 29 and remain in the collecting tray 23. After the perforated metal sheet 18 has been folded up, it is possible for swarf and cont~;n~nts to be removed from the collecting tray 23 by means of a vacuum cleaner or the like.
However, the scope of the invention is also intended to include the possibility of providing lateral perforated metal sheets, which are, if appropriate, placed onto the perforated metal sheet 18 and in which further nozzles 17 engage and, by means of nozzle attachments 28, blow out lateral recesses 23 in a workpiece 25 in the manner described above.
In a further exemplary embodiment of the present invention according to Figure 5, compressed air is fed via the line 11 to the manifold 14, from which a plurality of control valves 15, 15.1 to 15.3 branch off. As described above, it is possible for a plurality of containers 9 with valves 10 to be connected to each control valve 15, 15.1 to 15.3, being connected to the nozzles 17 and, if appropriate, nozzle attachments 28 via lines 16. As distinct from the exemplary embodiment according to Figure 4, each control valve 15 is connected to a pneumatic control device 30, which regulates a series of consecutive sequences, in particular compression of air in the containers 9 and expansion processes of individual control valves 15, 15.1, 15.2, also as a function of time. Thus, it is possible, for example, for the control valve 15.1 to fill the containers 9 with compressed air and subsequently feed the air to the nozzle 17 upon a signal. While the air is flowing out of the containers 9 that are connected to the control valve 15.1, it is possible, for example, for further containers 9 that are connected to the control valve 15.2 to be filled with compressed air.
The duration of the filling of the containers 9 can also be regulated by the control device 30, thought being given to filling the containers 9 for a determinable time or regulating a filling process as a function of pressure. These regulating processes are preferably carried out pneumatically, so that no power connection is necessary.
A repeated filling process of the containers 9 following expansion can also be performed by the control device 30, as desired.
A further significant advantage of the present invention is that any number of control valves 15, 15.1, 15.2 can be connected to a manifold 14, any number of containers 9 with valves 10 in turn being connected to said control valves. The greater the number of containers 9 that are connected to a control valve 15, the longer the duration of the filling process until a spècific pressure is reached.
If, for example, workpieces 25 having only a few recesses 29 are clamped into the workpiece holders 24, then only a low number of containers 9 and, in particular, nozzles 17 with nozzle attachments 28 are required for blowing out and cleaning. The workpiece 25 is processed correspondingly quickly.
Furthermore, a plurality of workpieces 25 can also be clamped onto the perforated metal sheet 18, a relatively large number of control valves 15, 15.1 to 15.3 with separ-ately connected containers 9 in each case being expedient for this purpose, since, during a recharging process or compression process, for example, a new workpiece to be cleaned can be clamped in workpiece holders 24.
A device R, which can be adapted in a versatile manner and form to workpieces 25 of different constructions, in particular castings, is provided here.
Toward the bottom, the housing 1 is opened within a frame 8, as illustrated in Figure 3. The frame 8 comprises a multiplicity of individual containers 9, which are connected to one another, for example welded, and which in each case are constructed as pressure containers. Of course, it is also within the scope of the invention for the containers 9 to be inserted into the housing 1 in a different arrangement. The containers 9 are preferably constructed to be like cubes and partitioned off from one another. They have an opening, not shown specifically here, into which a valve 10 is inserted in each case.
Compressed air from a compressed-air source lla is fed to the device R from the outside via a line 11 and, as illustrated in Figures 2 and 3, said air is led into the interior of the housing 1 through a dewatering unit 12 and adjacent filter 13. In the interior of the housing, the line 11 reaches a manifold 14, which distributes the air to a plurality of control valves 15. A plurality of containers 9 are connected to each control valve 15 via valves 10.
Furthermore, each container 9 or each valve 10 is connected to at least one nozzle 17 via a line 16.
The nozzles 17 can be inserted in any desired manner into a perforated metal sheet 18, which is inserted into the housing 1 in the manner illustrated. The perforated metal sheet 18 is preferably fixed via a hinge 19 to guide columns 20 so that it can be folded and, at the other end, rests on a further guide column 21 and can be fixed there by means of a fastening element 22. In order to fold the perforated metal sheet 18 upward, said sheet being mounted on the guide columns 20 so that it can rotate about the hinge 19, it is necessary for the fastening elements 22 to be released. Here, too, thought is given to holding the perforated metal sheet 18 in an upwardly folded position, corresponding to the lid 4, via gas springs, which are not illustrated here.
Underneath the perforated metal sheet 18, a collecting tray 23 is arranged in a similar way in the housing 1. The perforated metal sheet 18 and the collecting tray 23 are arranged on the guide columns 20, 21 so that their height can be adjusted.
It is possible to fasten to the perforated metal sheet 18 any number of workpiece holders 24, which are able to hold a workpiece 25, preferably at a distance from the perforated metal sheet 18. Via clamping devices, clamping brackets or similar elements, not shown here, the workpiece 25 can be rereleasably fixed to the workpiece holders 24.
In order that the device R can be used flexibly with respect to location, said device is preferably assigned rotatable and fixable rollers 26 on the frame 8 of the housing 1.
In order that the device R operates with low noise levels, sound insulation 27, indicated by dashed lines, is provided within the lid 4. It is also possible for sound-insulating materials to be provided on the inside on the side walls 2, 3 and end walls 2.1, 3.1.
The functioning of the present invention is as follows.
Air is fed to the device R from the outside via the line 11, the air being dewatered in the dewatering device 12 and subsequently being cleaned by the very fine filter 13.
From the filter 13, the compressed air is fed to the manifold 14 and, uniformly distributed, passed on to a plurality of control valves 15. This can be seen, in particular, in Figure 4.
The control valve 15 is connected to a multiplicity of containers 9 and, in particular, to their valves 10, each valve 10 being connected in each case via a line 16 to a nozzle 17 that is inserted into the perforated metal sheet 18. The nozzles 17 can be inserted in any desired distribution in any holes in the perforated metal sheet 18.
The compressed air is distributed from the control valve 15 to all the containers 9 that are connected to the control valve 15, and is compressed in said containers, until a specific pressure ha~ been built up. During the charging of the containers 19 with compressed air, the connection between valve 10, line 16 and nozzle 17 remains closed. When the containers 9 have reached a specific pressure after a specific time, then, in response to a specific signal from the control valve 15, for example by means of a vacuum, the valve 10 can be shut off in the direction of the control valve 15, at the same time a connection between container 9 and nozzle 17 via the line 16 being opened and the compressed air emerging from the nozzles 17 at a high velocity.
Since the compressed air, which is supplied via the line 11 via a conventional compressed-air system, is not available in such great quantities, air is compressed in each container 9 that is connected to the control valve 15. While air is flowing out of the container 9, via the line 16 and out of the nozzle 17, no air is supplied to the container 9 via the control valve 15.1. In this case, while the air is flowing out, a further control valve 15.2 is supplied with air in a manner corresponding to that described above, further valves 10 with containers 9 being connected to said further control valve 15.2 and likewise being able to supply nozzles 17 with compressed air following its compression in the container 9.
However, it is also significant in the present invention that the air that is compressed in the container 9 flows out of the nozzle 17 abruptly via the line 16, the air being guided into recesses 29 in the workpiece 25 via a nozzle attachment 28, if appropriate a flexible nozzle attachment 28, which is placed onto the nozzle 17. The blowing out of these recesses 29 is thus performed under very high pressure using a large volume of air. If a plurality of containers are filled with air, it is possible for a multiplicity of recesses, in particular blind holes, threaded holes or the like, to be freed from contaminants and, in particular, swarf.
The alignment of the nozzles 17 and, in particular, of the nozzle attachments 28 is carried out by means of a template, which, for example, can be produced from Plexiglas, on which the recesses 29 in a workpiece are drawn and with which the corresponding nozzle attachments can then be aligned. After this, a multiplicity of recesses 29 in a workpiece 25 can be cleaned of contaminants in one operation.
These contaminants fall through the perforated metal sheet 29 and remain in the collecting tray 23. After the perforated metal sheet 18 has been folded up, it is possible for swarf and cont~;n~nts to be removed from the collecting tray 23 by means of a vacuum cleaner or the like.
However, the scope of the invention is also intended to include the possibility of providing lateral perforated metal sheets, which are, if appropriate, placed onto the perforated metal sheet 18 and in which further nozzles 17 engage and, by means of nozzle attachments 28, blow out lateral recesses 23 in a workpiece 25 in the manner described above.
In a further exemplary embodiment of the present invention according to Figure 5, compressed air is fed via the line 11 to the manifold 14, from which a plurality of control valves 15, 15.1 to 15.3 branch off. As described above, it is possible for a plurality of containers 9 with valves 10 to be connected to each control valve 15, 15.1 to 15.3, being connected to the nozzles 17 and, if appropriate, nozzle attachments 28 via lines 16. As distinct from the exemplary embodiment according to Figure 4, each control valve 15 is connected to a pneumatic control device 30, which regulates a series of consecutive sequences, in particular compression of air in the containers 9 and expansion processes of individual control valves 15, 15.1, 15.2, also as a function of time. Thus, it is possible, for example, for the control valve 15.1 to fill the containers 9 with compressed air and subsequently feed the air to the nozzle 17 upon a signal. While the air is flowing out of the containers 9 that are connected to the control valve 15.1, it is possible, for example, for further containers 9 that are connected to the control valve 15.2 to be filled with compressed air.
The duration of the filling of the containers 9 can also be regulated by the control device 30, thought being given to filling the containers 9 for a determinable time or regulating a filling process as a function of pressure. These regulating processes are preferably carried out pneumatically, so that no power connection is necessary.
A repeated filling process of the containers 9 following expansion can also be performed by the control device 30, as desired.
A further significant advantage of the present invention is that any number of control valves 15, 15.1, 15.2 can be connected to a manifold 14, any number of containers 9 with valves 10 in turn being connected to said control valves. The greater the number of containers 9 that are connected to a control valve 15, the longer the duration of the filling process until a spècific pressure is reached.
If, for example, workpieces 25 having only a few recesses 29 are clamped into the workpiece holders 24, then only a low number of containers 9 and, in particular, nozzles 17 with nozzle attachments 28 are required for blowing out and cleaning. The workpiece 25 is processed correspondingly quickly.
Furthermore, a plurality of workpieces 25 can also be clamped onto the perforated metal sheet 18, a relatively large number of control valves 15, 15.1 to 15.3 with separ-ately connected containers 9 in each case being expedient for this purpose, since, during a recharging process or compression process, for example, a new workpiece to be cleaned can be clamped in workpiece holders 24.
A device R, which can be adapted in a versatile manner and form to workpieces 25 of different constructions, in particular castings, is provided here.
Claims (25)
1. A method for blowing out and cleaning recesses in at least one workpiece, in particular blind holes, holes, drilled holes and threaded holes, using a gas, in particular air, which originates from a compressed-air source, the gas being compressed to a predetermined pressure in at least one container, wherein the gas from a single container or a plurality of containers, which are filled and each connected to a single nozzle, is subsequently expanded into a recess in the workpiece in order to remove contaminants, in particular swarf, from the recess.
2. The method as claimed in claim 1, wherein a plurality of containers are filled with gas via at least one control valve and subsequently, via at least one valve, the compressed gas is fed from the containers, via one line in each case, to one nozzle in each case, while further containers are being filled with gas via other control valves.
3. The method as claimed in claim 1 or 2, wherein a control device or the control valve itself is used to regulate the filling and/or outflow to the appropriate nozzles sequentially and/or as a function of time and/or as a function of pressure.
4. A device for blowing out and cleaning recesses (29) in at least one workpiece (25), in particular blind holes, holes, drilled holes and threaded holes, using a gas, in particular air, which originates from a compressed-air source (11a), a plurality of nozzles (17) and/or nozzle attachments (28) being directed onto recesses (29) in at least one workpiece (25), wherein a plurality of containers (9) are connected to a compressed-air source (11a), one nozzle (17) being connected to each container (9) in each case.
5. The device as claimed in claim 4, wherein the nozzles (17) and/or nozzle attachments (28) are connected to at least one container (9).
6. The device as claimed in claim 4, wherein each container (9) is connected to one nozzle (17) and/or one nozzle attachment (28) each.
7. The device as claimed in claim 5 or 6, wherein the container (9) is constructed as a pressure container and is provided with a valve (10).
8. The device as claimed in at least one of claims 5-7, wherein a plurality of containers (9) are connected together to form a frame (8) of a housing (1).
9. The device as claimed in claim 8, wherein the housing (1) has side walls (2, 3) and end walls (2.1, 3.1), it being possible for an upper opening (6) of the housing (1) to be closed by a lid (4).
10. The device as claimed in claim 9, wherein the lid (4) is connected in a hinged manner to the housing (1), at least one gas spring (5) being provided between housing (1) and lid (4).
11. The device as claimed in claim 9 or 10, wherein the lid (4) is provided with a bolt (7), which connects the lid (4) to the housing (1).
12. The device as claimed in at least one of claims 8-11, wherein guide columns (20, 21) are assigned to the housing (1).
13. The device as claimed in claim 12, wherein a collecting tray (23) is arranged on guide columns (20, 21) so that the height can be adjusted.
14. The device as claimed in claim 13, wherein, above the collecting tray (23), a perforated metal sheet (18), which can be folded up and/or whose height is adjustable, is assigned to the guide columns (20, 21).
15. The device as claimed in claim 14, wherein the nozzles (17) can have their positions on the perforated metal sheet (18) varied.
16. The device as claimed in claim 14 or 15, wherein the nozzle attachments (28) are placed onto the nozzles (17), which are rereleasably fixed to the perforated metal sheet (18).
17. The device as claimed in at least one of claims 14 to 16, wherein the perforated metal sheet (18) is assigned rereleasable workpiece holders (24).
18. The device as claimed in claim 17, wherein the workpiece holders (24) form a rest for at least one workpiece (25).
19. The device as claimed in at least one of claims 4-18, wherein the nozzle attachments (28) are constructed so as to be flexible and, if necessary, able to be bent.
20. The device as claimed in at least one of claims 4-19, wherein a line (11) for conveying gas, in particular air, is connected to a manifold (14), and the air is led through an intermediately located dewatering device (12) and a filter (13).
21. The device as claimed in claim 20, wherein at least one control valve (15) is connected to the manifold (14).
22. The device as claimed in claim 21, wherein a plurality of containers (9) with valves (10) is connected to each control valve (15).
23. The device as claimed in at least one of claims 7 to 22, wherein each valve (10) is connected to a nozzle (17) and/or a nozzle attachment (28) via a line (16) in each case.
24. The device as claimed in at least one of claims 21 to 23, wherein each control valve (15, 15.1 to 15.3) is connected to a control device (30).
25. The device as claimed in claim 24, wherein the control device (30) is of a pneumatic type and regulates compression and/or expansion processes of the control valves (15, 15.1 to 15.3) sequentially and/or as a function of time and/or as a function of pressure.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19549176A DE19549176A1 (en) | 1995-12-30 | 1995-12-30 | Method for blowing out and cleaning recesses of at least one workpiece |
| DE19549176.9 | 1995-12-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2241822A1 true CA2241822A1 (en) | 1997-07-10 |
Family
ID=7781660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002241822A Abandoned CA2241822A1 (en) | 1995-12-30 | 1996-12-18 | Method for purging and cleaning of recesses of at least one workpiece |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0873201A1 (en) |
| JP (1) | JP2001504027A (en) |
| KR (1) | KR19990076945A (en) |
| CA (1) | CA2241822A1 (en) |
| DE (1) | DE19549176A1 (en) |
| WO (1) | WO1997024193A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102886362A (en) * | 2012-09-14 | 2013-01-23 | 艾蒂盟斯（苏州）压铸电子技术有限公司 | Aluminum debris cleaning and blowing device and aluminum debris cleaning and blowing method of threaded hole |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10055127A1 (en) * | 2000-11-07 | 2002-05-08 | Daimler Chrysler Ag | Cleaning process based on compressed cleaning fluid involves using fluid decompressed at pressure producing gas volume which is multiple of compressed volume |
| KR100597935B1 (en) * | 2004-05-06 | 2006-07-13 | 박영수 | A cleaner for a electric appliance |
| DE102005027721A1 (en) * | 2005-06-16 | 2007-01-04 | Dürr Ecoclean GmbH | Cleaning device and method for cleaning workpieces |
| CN102608524A (en) * | 2012-03-31 | 2012-07-25 | 昆山迈致治具科技有限公司 | Testing jig of circuit board |
| CN103111440B (en) * | 2013-02-22 | 2015-11-25 | 美诺精密压铸(上海)有限公司 | For the blow device purged the blind hole of workpiece |
| DE102014001427A1 (en) * | 2014-02-05 | 2015-08-06 | Robot-Technology Gmbh | Device for sucking and / or blowing out a component and method |
| CN107649457B (en) * | 2017-09-11 | 2023-05-23 | 天津七一二通信广播股份有限公司 | Dust removing jig for complex surface of electronic instrument and meter and using method |
| CN108500008A (en) * | 2018-03-09 | 2018-09-07 | 昆山国显光电有限公司 | reaction chamber cleaning device |
| CN108672409A (en) * | 2018-06-26 | 2018-10-19 | 天津龙创恒盛实业有限公司 | Automation processing device for sealing and cleaning |
| CN111001627A (en) * | 2019-11-28 | 2020-04-14 | 盐城瑞嘉汽车服务有限公司 | Automobile spare and accessory part surface cleaning equipment |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2549805A1 (en) * | 1975-11-06 | 1977-05-12 | Rudolf Duehlmeier | Air jet for cleaning bottom of drilled hole - is directed partly into hole and partly on to metal beside it |
| DE2944880A1 (en) * | 1979-11-07 | 1981-05-27 | Radium-Chemie AG, Teufen | Radioactive decontamination uses gas jets - in closed circuit contg. gas purification. plant followed by particle bombardment |
| DE8019194U1 (en) * | 1980-07-17 | 1980-12-04 | Ringler, Bernhard, 7076 Waldstetten | DEVICE FOR CLEANING WORKPIECES |
| US5054155A (en) * | 1990-02-16 | 1991-10-08 | Cmi International, Inc. | Apparatus for cleaning passageways in metal castings |
| US5419352A (en) * | 1993-04-19 | 1995-05-30 | Johnson; Carl W. | Cleaning system and method |
-
1995
- 1995-12-30 DE DE19549176A patent/DE19549176A1/en not_active Withdrawn
-
1996
- 1996-12-18 CA CA002241822A patent/CA2241822A1/en not_active Abandoned
- 1996-12-18 JP JP52400397A patent/JP2001504027A/en active Pending
- 1996-12-18 EP EP96943990A patent/EP0873201A1/en not_active Withdrawn
- 1996-12-18 KR KR1019980705073A patent/KR19990076945A/en not_active Application Discontinuation
- 1996-12-18 WO PCT/EP1996/005675 patent/WO1997024193A1/en not_active Application Discontinuation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102886362A (en) * | 2012-09-14 | 2013-01-23 | 艾蒂盟斯（苏州）压铸电子技术有限公司 | Aluminum debris cleaning and blowing device and aluminum debris cleaning and blowing method of threaded hole |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19549176A1 (en) | 1997-07-03 |
| KR19990076945A (en) | 1999-10-25 |
| WO1997024193A1 (en) | 1997-07-10 |
| EP0873201A1 (en) | 1998-10-28 |
| JP2001504027A (en) | 2001-03-27 |
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