Classifications

• • 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
• • 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
  • B08B5/04—Cleaning by suction, with or without auxiliary action
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B08—CLEANING
  • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
  • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 

Definitions

• the present invention relates to a cleaning device for cleaning a workpiece, which comprises a suction device for sucking impurities from an interior of the workpiece.
• Known industrial suction systems have a suction power ranging from about 15,000 Pa to about 35,000 Pa.
• the suction power of this industrial vacuum cleaner is too low to reliably remove contaminants from the cavities of, in particular machined, workpieces.
• the present invention has for its object to provide a cleaning device of the type mentioned, which has a suction device with a particularly large suction.
• the suction device at least one vacuum container, at least one evacuation device for evacuating the vacuum vessel, at least one vent line for connecting the vacuum container to the workpiece and at least one locking device for shutting off the Includes connection between the vacuum container and the workpiece.
• the contaminant particles are conveyed in this way to the vacuum container or to a separation device connected between the vacuum container and the workpiece, where it is separated from the airflow generated by the opening of the blocking device.
• the cleaning device according to the invention has the advantage that here a very high pressure difference of, for example, 900 mbar to 940 mbar between the interior of the vacuum vessel and the interior of the workpiece can be effective, which is significantly greater than the pressure difference, which is produced with industrial vacuum cleaner ,
• the cleaning device according to the invention is particularly suitable as an industrial cleaning device for the sequential cleaning of a plurality of workpieces, in particular of machined workpieces.
• the cleaning device according to the invention is particularly suitable for removing machining residues, such as metal shavings, blasting agents, foundry sand and machining fluids, from the interiors of workpieces with complex geometry, such as cylinder heads or crankcases.
• machining residues such as metal shavings, blasting agents, foundry sand and machining fluids
• the cleaning device according to the invention is particularly suitable for cleaning the narrow and highly branched cooling water channels in a passenger car cylinder head. During mechanical processing, metal chips fall into these cooling water channels. It is by means of the cleaning device according to the invention It is possible to remove soy iose in the Riehiwasserkanäien from the workpiece lying Metaiis journalne.
• the cleaning device according to the invention offers the advantage that no flow dead spaces arise within the workpiece, in which particles can remain.
• the vacuum container In order to produce a particularly large suction power, it is advantageous if the vacuum container to a pressure of at most about 100 mbar, preferably at most about 50 mbar, is evacuated.
• the barrier means can be fully opened within the time period of at most about 2 seconds, preferably at most about 0.5 seconds.
• the vacuum container can be ventilated within an opening time of the blocking device of at most approximately 2 seconds such that its internal pressure is at least 90% of the external pressure. In this way, a particularly strong air flow through the workpiece in the vacuum container can be generated, which reliably removes the particles present in the interior of the workpiece.
• the workpiece to be cleaned preferably has at least one hollow space which opens at at least one point on an outer side of the workpiece. This discharge point on the outside of the workpiece is connected to the vacuum container via the ventilation line.
• the suction device comprises a plurality of ventilation lines, which can be arranged simultaneously at different locations on the outside of the workpiece.
• the at least two locking devices can be opened at the same time, this can generate a particularly strong flow of air through the workpiece and the two ventilation lines.
• the at least two locking devices can be opened one after the other.
• successively differently directed air streams can be generated through the workpiece, which may be advantageous to release stuck particles from the workpiece, which can not be solved if they are acted upon only from one side with an air flow.
• the suction device comprises at least two vacuum containers and for each of the vacuum container at least one vent line for connecting the vacuum container with the workpiece and at least one locking device for shutting off the connection between the respective vacuum container and the workpiece.
• the at least two vacuum containers can be ventilated simultaneously or successively.
• the cleaning device advantageously comprises at least one evacuation device, by means of which at least two vacuum containers of the suction device can be evacuated, the expenditure on equipment for evacuating the vacuum containers can be reduced.
• the evacuation device for evacuating one or more vacuum containers preferably comprises at least one vacuum pump, at least one suction line for connecting the vacuum pump to at least one vacuum container and at least one shut-off device for shutting off the connection between the vacuum pump and the vacuum container.
• the suction device of the cleaning device according to the invention preferably comprises at least one separation device for separating impurities from an air flow which flows from the workpiece to the vacuum container.
• Such a separation device may in particular comprise a gravity separator.
• the at least one separating device comprises a filter element, for example a bag filter or a filter screen.
• the extraction device comprises a removal device, by means of which separated impurities can be removed from the separation device.
• the separation device may be provided downstream of the barrier means, ie on the side of the barrier means facing the vacuum vessel. In this case, the separation device is evacuated together with the vacuum container.
• the separation device is provided upstream of the barrier device, i. on the workpiece facing side of the locking device. In this case, the separation device remains at the ambient pressure until the barrier device is opened.
• a particularly space-saving construction of the cleaning device results when the separation device is arranged inside the vacuum container.
• the separation device is arranged between the workpiece and the vacuum container.
• the vacuum container is designed as a vacuum chamber, in which another than the workpiece to be sucked just can be introduced.
• the vacuum container is designed as a vacuum drying chamber.
• the vacuum drying chamber is evacuated anyway to perform the vacuum drying process therein. After the vacuum drying process is ventilated the vacuum drying chamber; This ventilation process can be used for the vacuum suction process.
• the present invention further relates to a method for cleaning a workpiece, comprising the following method steps:
• Figure 1 is a schematic representation of a suction device of an industrial cleaning device for cleaning workpieces, which comprises a vacuum container with integrated separation device.
• Figure 2 is a schematic representation of a second embodiment of a suction device for a cleaning device, which comprises two vacuum containers, which are connected via two separate ventilation lines with separate locking means with a workpiece.
• FIG. 3 shows a schematic illustration of a third embodiment of a suction device for a cleaning device, which comprises a vacuum tank designed as a vacuum drying chamber and a separating device connected between the vacuum drying chamber and the workpiece; and
• Fig. 4 is a schematic representation of a fourth embodiment of a suction device for a cleaning device, in which the separation device is integrated into the vacuum container and the vacuum container can be evacuated via a vacuum drying chamber and after evacuation of the vacuum drying chamber and separately ventilated via the workpiece.
• a suction device shown generally at 100 in FIG. 1, for extracting contaminants from an interior 102 of a workpiece 104, such as a cylinder head or crankcase, includes a vacuum vessel 106 which is vented through a vent conduit 108 in which a barrier means 110 is formed one, for example, electromotive, electromagnetically or pneumatically actuated, check valve 112 is arranged, is connected to the workpiece 104.
• a workpiece-side fitting 114 of the vent pipe 108 is disposed on an outer surface of the workpiece 104 so as to surround a mouth opening 116 of a cavity 118 provided in the workpiece 104 substantially gas-tight.
• the vacuum tank 106 is connected via a suction line 120, in which a shut-off device 122 in the form of, for example electromagnetically, electromotively or pneumatically actuated, shut-off valve 124 is connected to the suction side of a vacuum pump 126, which together with the suction 120 an evacuation device 128 for Evacuate the interior 130 of the vacuum vessel 106 forms.
• a shut-off device 122 in the form of, for example electromagnetically, electromotively or pneumatically actuated, shut-off valve 124 is connected to the suction side of a vacuum pump 126, which together with the suction 120 an evacuation device 128 for Evacuate the interior 130 of the vacuum vessel 106 forms.
• a separation device 132 for separating impurities from an entering into the interior 130 of the vacuum container 106 air flow is integrated, which comprises a gravity separator 134.
• the gravity separator 134 may include a hollow cylinder 138 projecting downwardly from a horizontal divider 136 extending across the horizontal cross section of the vacuum vessel 106, one between the outer wall of the hollow cylinder 138 and the inner wall the vacuum container 106 remaining gap 140 limited, soft in coming from the workpiece 104 vent line 108 opens.
• the interior of the hollow cylinder 138 communicates via a (not shown) passage opening in the horizontal partition wall 136 with a suction chamber 142 in the upper part of the vacuum container 106, in which the leading to the vacuum pump 126 suction line 120 opens.
• the vacuum container 106 is closed by means of a closure flap 144.
• the suction device 100 described above functions as follows:
• the check valve 112 is closed in the vent line 108 and the check valve 124 is opened in the suction 120.
• the volume of the interior space 130 of the vacuum container may be, for example, about 200 l.
• the interior 130 of the vacuum container 106 is evacuated by the vacuum pump 126 from the ambient pressure of, for example, about 950 mbar to a final pressure of, for example, about 20 mbar. After reaching the final pressure of, for example, 20 mbar, the shut-off valve 124 is closed in the suction 120.
• a high negative pressure is briefly generated in the interior 102 of the workpiece 104, which causes ambient air to communicate at high speed through all the openings through which the interior 102 of the workpiece 104 communicates with the surrounding atmosphere, into the cavities 118 in the interior of the workpiece 104 penetrates, there located impurities in the form of particles stirred up and entrains in the direction of the connector 114 of the vent line 108.
• the inflow direction of the air from the ambient atmosphere into the interior 102 of the workpiece 104 is indicated in FIG. 1 by the arrows 148.
• the fluidized particles are conveyed to the vacuum tank 106 in the air flow flowing through the ventilation duct 108 into the inner space 130 of the vacuum tank 106, enter the gap 140 between the hollow cylinder 138 and the inner wall of the vacuum tank 106, and fall due to the action of gravity to the bottom of the vacuum container 106.
• the air flow from the workpiece 104 to the vacuum container 106 ends when the pressure in the interior 130 of the vacuum container 106 has increased to the external pressure of, for example, about 950 mbar.
• the check valve 112 is closed in the vent line 108 and the check valve 124 is opened in the suction line 120 to initiate a further evacuation phase of the suction device 100.
• the workpiece 104 is disconnected from the vent line 108 and the next workpiece 104 to be machined is connected to the vent line 108.
• the shutter 144 is opened (with the vacuum tank 106 aerated) to force the impurities accumulated on the bottom of the vacuum container 106 through gravity opened shutter 144 to fall into the underlying collection container 146.
• a second embodiment, shown in FIG. 2, of a suction device 100 for a cleaning device for cleaning workpieces differs from the first embodiment shown in FIG. 1 in that, in addition to the first vacuum container 106, a further vacuum container 106 'is provided, which via another Vent line 108 'with a locking device 110' in the form of a check valve 112 'with the interior 102 of the workpiece 104 is connected.
• connection piece 114 'of the second ventilation line 108' in this case surrounds a different opening 116 'than the connection piece 114 of the first ventilation line 108.
• the two vent lines 108, 108 ' may be connected to different accesses to the same cavity 118 of the workpiece 104 or to accesses to various cavities within the workpiece 104.
• the second vacuum container 106 is connected to the suction side of the vacuum pump 126 via a suction line 120 ', in which a shut-off device 122' in the form of a shut-off valve 124 'is arranged.
• the two suction lines 120, 120 " which come from the two vacuum containers 106, 106', combine to form a common suction line end 150, which is connected to the vacuum pump 126 is connected.
• the second vacuum container 106 ' may be constructed the same as the first vacuum container 106.
• a second sump 146' for receiving contaminants that accumulate in the operation of the suction device 100 at the bottom of the second vacuum container 106 ', is arranged.
• a separation device 132' in the form of a gravity separator 134 ' is integrated.
• the two ventilation lines 108, 108 ' are preferably connected to opposite end sides of the workpiece 104.
• the two vacuum heaters iu6, i ⁇ 6 ! are evacuated gieichzeitig or successively by means of the vacuum pump 126 to a final pressure of, for example, about 20 mbar, wherein the respective vacuum container 106, 106 'associated shut-off valve 124, 124' in the suction 120 and 120 'open and that the respective vacuum tank 106, 106 "associated check valve 112, 112 'in the vent line 108 and 108' is closed.
• the vacuum containers 106, 106 ' can be ventilated simultaneously or sequentially via the respectively associated ventilation line 108 and 108', in which case contaminants from the interior 102 of the workpiece 104 by the air flow entering the workpiece 104 either simultaneously to both vacuum containers 106 , 106 'or one after the other in the one vacuum container 106 and then in the other vacuum container 106' are promoted.
• the accumulating at the bottom of the vacuum container 106, 106 'impurities are converted as needed by opening the respective flap 144 and 144' in the respective associated collecting container 146 or 146 '.
• FIG. 2 A third embodiment of a suction device 100 shown in FIG. 3 forms part of a cleaning device, generally designated 152, for cleaning workpieces 104 which, in addition to the suction device 100, also comprises a wet cleaning device (not shown) in which the workpieces 104 are sucked after suction Impurities from the interior 102 of the workpieces 104 are cleaned in a wet process, which includes, for example, a Purple Hughesvorgang, subjecting the workpieces 104 under high pressure cleaning agent and / or pulse cleaning.
• a cleaning device generally designated 152
• the cleaning device 152 comprises a vacuum drying chamber 154, which is connected via a suction line 120 with a shut-off device 122 in the form of a shut-off valve 124 to a vacuum pump 126, by means of which the vacuum drying chamber 154 can be evacuated to a final pressure of, for example, approximately 20 mbar.
• the interior 156 of the vacuum drying chamber 154 is connected via a vent line 108 to the interior of a workpiece 104 to be sucked off.
• a locking device 110 is arranged in the form of a check valve 112.
• a separator 132 is provided in the vent line 108, which in this embodiment comprises a vacuum-compatible container 158 passing through a filter element 160, for example a filter screen, is subdivided into an inflow space 162 and an outflow space 164.
• the inflow space 162 is connected to the workpiece 104 via a workpiece-side section 166 of the ventilation line 108, while the outflow space 164 is connected to the vacuum drying chamber 154 via a dry-chamber-side section 168 of the ventilation line 108.
• a closure flap 144 is provided, by means of which impurities deposited in the separation device 132 can be removed from the separation device 132.
• the vacuum drying chamber 154 serves as the vacuum container 106, which is pre-evacuated and then vented by abrupt opening of the stopper 110 to ambient air due to the pressure difference between the inner space 156 and the outer space (at an external pressure of, for example, about 950 mbar).
• the vacuum drying chamber 154 serves as the vacuum container 106, which is pre-evacuated and then vented by abrupt opening of the stopper 110 to ambient air due to the pressure difference between the inner space 156 and the outer space (at an external pressure of, for example, about 950 mbar).
• the ventilation of the vacuum drying chamber 154 which is anyway required at the end of the vacuum drying process in the vacuum drying chamber 154, can also be used to suck off the workpiece 104 located outside the vacuum drying chamber 154.
• the interior of the separation device 132 is in this embodiment of a suction device 100 before and after the ventilation phase at the ambient pressure of, for example, about 950 mbar.
• a fourth embodiment of a suction device 100 for a cleaning device 152 shown in FIG. 4 comprises a vacuum tank 106 which has a ventilation line 108 with a blocking device 110 in the form of a shut-off valve 112 to a workpiece 104 to be suctioned off and via a suction line 120 with a shut-off device 122 in the form a shut-off valve 124 is connected to a vacuum drying chamber 154 of the cleaning device 152.
• the interior 156 of the vacuum drying chamber 154 is in turn connected to a vacuum pump 126 via a suction line 170, in which a shut-off device 172 is arranged.
• a separation device 132 for example in the form of a gravity separator 134, integrated.
• a closure flap 144 is provided, by means of which impurities deposited by the separation device 132 can be removed from the interior 130 of the vacuum container 106.
• the vacuum container 106 is evacuated together with the vacuum drying chamber 154 to a final pressure of, for example, about 20 mbar.
• the shut-off valve 124 in the suction line 120 and the shut-off valve 174 in the suction line 170 are opened while the check valve 112 in the ventilation line 108 is closed.
• the vacuum pump 126 can therefore be used both for the evacuation of the vacuum drying chamber 154 and for the evacuation of the vacuum container 106.
• the vacuum container 106 After evacuation of the vacuum container 106, the vacuum container 106 is separated from the interior 156 of the vacuum drying chamber 154 by closing the shut-off valve 124.
• the vacuum vessel 106 is ventilated by suddenly opening the check valve 112 in the vent line 108 separately and independently of the vacuum drying chamber 154 to suck air from the environment through the inner space 102 of the workpiece 104 into the vacuum container 106 while removing contaminants from the inner space 102 of the workpiece 104 to promote the separation device 132, which deposits these impurities from the air flow.
• the vacuum drying chamber 154 may also be vented separately and independently of the vacuum vessel 106 upon completion of the vacuum drying operation for the workpiece 104 'disposed in the vacuum drying chamber 154. Subsequently, the vacuum drying chamber 154 and the vacuum chamber 106 can be evacuated together again by means of the vacuum pump 126, as already described above.
• FIG. 4 of a suction device 100 for a cleaning device 152 is identical in construction and function to the first embodiment shown in FIG. 1 and the third embodiment shown in FIG. 3, to the above description of which reference is made ,

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Cleaning By Liquid Or Steam (AREA)
• Cleaning In General (AREA)
• Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
• Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)

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• 2006
  • 2006-08-23 DE DE102006039507A patent/DE102006039507A1/de not_active Withdrawn
• 2007
  • 2007-08-02 DE DE502007004415T patent/DE502007004415D1/de active Active
  • 2007-08-02 RU RU2009110259/05A patent/RU2438801C2/ru not_active IP Right Cessation
  • 2007-08-02 JP JP2009524923A patent/JP5155315B2/ja not_active Expired - Fee Related
  • 2007-08-02 CN CN2007800255831A patent/CN101484252B/zh active Active
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  • 2007-08-02 WO PCT/EP2007/006848 patent/WO2008022700A1/fr active Application Filing
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• 2009
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