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
  • B08B5/02—Cleaning by the force of jets, e.g. blowing-out cavities

Definitions

• the present invention relates to a method for
• Blow out and clean recesses in at least one workpiece in particular blind holes, holes, bores and threaded bores, with a gas, in particular air, which comes from a compressed air source, and a device for carrying out the method.
• a disadvantage of this conventional cleaning method is that when blowing out with a nozzle and compressed air, a very loud, harmful noise is produced for people in the surrounding area and, in addition, residual impurities and in particular chips are shot out of blind holes, and thereby represent a danger to the operator, particularly his eyes.
• blowing out of recesses such as blind holes, threaded bends or the like. must be done very carefully in order not to have to be re-checked on the one hand and on the other hand not to damage parts by remaining impurities, in particular chips, later during assembly or in operation. It has been shown that blowing out by hand is very cost-intensive, since each individual recess must be blown out by hand using compressed air and a gun. Often one or the other recesses are forgotten, so that a complete series has to be checked and revised again if the error occurs.
• the object of the present invention is to eliminate the disadvantages mentioned above and to provide a method which permits residue-free cleaning and in particular blowing out of recesses, it also being possible to revise a large number of workpieces and recesses in a workpiece.
• the time and costs involved in cleaning and blowing out recesses in workpieces, in particular castings are to be considerably reduced.
• the gas is compressed to a predetermined pressure in at least one container and then the gas compressed in the container is expanded into at least one recess in the workpiece to remove contaminants, in particular chips, from the recess.
• This invention allows that through a plurality of nozzles arranged in a perforated plate, recesses, in particular blind holes, holes or bores, of castings can be blown out at high pressure and cleaned of chips and contaminants.
• the nozzles are inserted into a perforated plate as desired, which is arranged in a housing that is adjustable in height via columns.
• a workpiece can be clamped on the perforated plate using workpiece holders, which has recesses, in particular bores, threaded bores or the like. having . This workpiece should be cleaned of contaminants.
• the nozzles and in particular the nozzle attachments are aligned with the recesses of the workpiece, they can be designed to be flexible and preferably bendable. Materials such as aluminum, copper or the like are preferred for the nozzles or nozzle attachments. used. So that the alignment of the nozzle attachments can be done quickly and easily, with the help of a template Localized recesses, after which the nozzle attachments can be easily and quickly aligned.
• a housing for the device preferably has rectangular to square shapes.
• a large number of containers arranged side by side form the frame of the housing, with side and end walls protruding from this frame.
• the housing is closed by a cover, which can have sound-insulating materials or insulation elements, in particular on the inside.
• four guide columns are assigned to the inside of the housing, the perforated plate on these guide columns preferably being arranged such that they can be folded upwards in accordance with the cover.
• An underlying collecting tray collects the falling chips and impurities which, for example, can be removed by an industrial vacuum cleaner after the perforated plate has been folded up.
• it is contemplated to design the guide columns with the perforated plate to be height-adjustable for workpieces of different thicknesses.
• the housing can be moved via rollers, which are optionally rotatably and fixably arranged on the frame.
• This device can be transported to various machining centers and connected to the conventional compressed air system anywhere, for example to clean the machined workpieces, especially castings.
• Another important advantage of the present invention is that the device can be used universally and, above all, can be set up individually for all conceivable parts.
• the nozzles or nozzle attachments are assigned to the workpiece, in particular its recesses, via side standing plates can be.
• Several workpieces can also be machined simultaneously if they are clamped in several workpiece holders on the perforated plate.
• a particularly effective embodiment of the invention is given when a plurality of control valves are arranged on a central distributor in the interior of the housing. Any number of containers can be connected to each control valve, which can be filled with air via a specific valve assigned to the container. If the containers are filled, the valve on the container is opened in response to a specific signal from the control valve and a connection between the container and the nozzle is released, so that the entire compressed content of air is suddenly released to the nozzle.
• the recesses are quickly cleaned of chips. The chips fall through the holes in the perforated plate into the drip tray. They can then be removed there.
• the advantage of the present invention is that any number of containers can be connected to at least one or more control valves, so that a precisely definable and determinable number of nozzles in different Sequences supply air with high pressure to the recesses.
• a time course or sequence of the compression of air and the unloading or expansion of the air from the container to the nozzle can be regulated. Repeated charging or releasing the air to the individual nozzles is also possible here.
• This control is preferably carried out pneumatically.
• This device according to the invention is used very economically, particularly in series production, since the time in which a workpiece is machined by a machining center can be used for cleaning and cleaning and in particular for blowing out recesses in parts which have already been produced.
• the air discharged from the nozzles flows out laterally and is led down through the housing, where it emerges.
• Insulating mats and in particular filter mats can of course also be provided there.
• Safety mechanisms should also be considered here, so that, for example, when the lid is opened, air is prevented from being blown out and expanded from a container or a nozzle.
• FIG. 1 shows a schematically illustrated front view of a device for blowing out cavities
• Figure 2 is a plan view of the device of Figure 1;
• Figure 3 is a perspective view of the device of Figure 1;
• FIG. 4 shows a block diagram representation of a control of the device according to FIG. 1;
• FIG. 5 shows a block diagram representation of a further exemplary embodiment of the control of the device according to FIG. 4.
• a device R according to the invention has
• 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 square housing 1, which can be closed from above via a hinged cover 4. So that the cover 4 remains in an open position, at least one gas pressure spring 5 is assigned to it, which is connected at the other end to the housing 1. If the cover 4 is moved downward, it closes an opening 6.
• the cover 4 can be fixed relative to the housing 1 by means of a latch 7.
• the housing 1 is open at the bottom, as shown in FIG. 3, within a frame 8.
• the frame 8 is open at the bottom, as shown in FIG. 3, within a frame 8.
• the 8 consists of a plurality of individual interconnected, for example welded, containers 9, which are each designed as a pressure vessel.
• containers 9 can be inserted into the housing 1 in a different arrangement.
• the containers 9 are preferably cube-shaped and sealed off from one another. They have an opening, not shown here, in each of which a valve 10 is inserted.
• Compressed air is supplied from the outside from a compressed air source Ila via a line 11 to the device R, which, as shown in FIGS. 2 and 3, is fed into the interior of the housing 1 through a drainage unit 12 and subsequent filter 13. There, the line 11 arrives at a distributor 14, which distributes the air to several 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 into a perforated plate 18 which is inserted into the housing 1 in the manner shown.
• the perforated plate 18 is preferably fixed in a foldable manner via a hinge 19 to guide columns 20 and lies at the other end on a further guide column 21 and can be fixed there by means of a fastening element 22.
• the fastening elements 22 In order to fold up the perforated plate 18, which is rotatably mounted about the joint 19 on the guide columns 20, the fastening elements 22 must be detached.
• gas pressure springs not shown here
• a collecting tray 23 is arranged in a similar manner below the perforated plate 18 in the housing 1.
• the perforated plate 18 and the collecting tray 23 are arranged on the guide columns 20, 21 so as to be adjustable in height.
• Any number of workpiece holders 24 can be attached to the perforated plate 18, which can hold a workpiece 25 preferably at a distance from the perforated plate 18.
• the workpiece 25 can be releasably fixed on the workpiece holders 24 by means of clamping devices, clamping brackets or similar elements, not shown here.
• the device R is preferably arranged rotatable and fixable rollers 26 on the frame 8 of the housing 1.
• a dashed sound insulation 27 is provided within the cover 4. Sound-insulating insulation materials can also be provided on the inside on the side walls 2, 3 and end walls 2.1, 3.1.
• Air is supplied from the outside via the line 11 to the device R, the air in the dewatering device
• the control valve 15 is connected to a plurality of containers 9 and, in particular, their valves 10, each valve 10 being connected via a line 16 to a nozzle 17 inserted into the perforated plate 18.
• the nozzles 17 can be distributed in any holes in the perforated plate 18.
• the compressed air is distributed from the control valve 15 to all the containers 9 connected to the control valve 15 and compressed there until a certain pressure is built up.
• the connection between valve 10, line 16 and nozzle 17 remains closed while the containers 9 are being charged with compressed air. If the container 9 has reached a certain pressure after a certain time, the valve 10 can be blocked in the direction of the control valve 15 in response to a specific signal from the control valve 15, for example by means of negative pressure, with a connection between the container 9 and the nozzle 17 being simultaneously via the line 16 is opened and the compressed air emerges from the nozzles 17 at high speed.
• the air compressed in the container 9 suddenly flows out of the nozzle 17 via the line 16, the air in recesses 29 of the workpiece 25 being placed on the nozzle 17 and possibly flexible nozzle attachment 28 to be led.
• these recesses 29 are blown out under very high pressure with a large volume of air. If several containers are filled with air, a large number of recesses, in particular blind holes, threaded bores or the like, can be freed from impurities and in particular chips.
• the nozzles 17 and in particular the nozzle attachments 28 are aligned by means of a template, which can be made, for example, of plexiglass, on which the recesses 29 of a workpiece are drawn and the corresponding nozzle attachments can then be aligned thereon. Then a plurality of recesses 29 of a workpiece 25 can be cleaned of impurities in one operation. These contaminants fall through the perforated plate 29 and remain in the collecting tray 23. After the perforated plate 18 has been folded up, chips and contaminants or the like can be used by means of a vacuum cleaner. be removed from the drip tray 23.
• lateral if necessary. can be provided on the perforated plate 18, in which further nozzles 17 engage and blow out lateral recesses 23 of a workpiece 25 in the manner described above by means of nozzle attachments 28.
• compressed air is fed via line 11 to the distributor 14, from which a plurality of control valves 15, 15.1 to 15.3 branch off.
• a plurality of containers 9 with valves 10 can be connected to each control valve 15, 15.1 to 15.3 and are connected to the nozzles 17 and possibly nozzle attachments 28 via lines 16.
• each control valve 15 is connected to a pneumatic control device 30, which also regulates a sequence of successive processes, in particular compression of air in the containers 9 and expansion processes of individual control valves 15, 15.1, 15.2.
• it can Control valve 15.1 fill the container 9 with compressed air and then supply the air to the nozzle 17 in response to a signal.
• further containers 9 connected to the control valve 15.2 can be filled with compressed air.
• the duration of the filling of the containers 9 can also be regulated by the control device 30, with the intention being to fill the containers 9 for a definable time or to regulate a filling process as a function of pressure.
• These control processes are preferably carried out pneumatically, so that no power connection is necessary.
• a repeated filling process of the containers 9 after expansion can also be carried out by the control device 30, as desired.
• control valves 15, 15.1, 15.2 can be connected to a distributor 14, with which in turn any number of containers 9 are connected to valve 10.
• a device R is created, which can be adapted in a variety of ways and shapes to differently designed workpieces 25, in particular cast parts.

Landscapes

• Cleaning In General (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (2)

Family

ID=7781660

Family Applications (1)

Country Status (6)

Cited By (4)

Families Citing this family (7)

Citations (5)

• 1995
  • 1995-12-30 DE DE19549176A patent/DE19549176A1/de not_active Withdrawn
• 1996
  • 1996-12-18 EP EP96943990A patent/EP0873201A1/de not_active Withdrawn
  • 1996-12-18 CA CA002241822A patent/CA2241822A1/en not_active Abandoned
  • 1996-12-18 WO PCT/EP1996/005675 patent/WO1997024193A1/de not_active Application Discontinuation
  • 1996-12-18 KR KR1019980705073A patent/KR19990076945A/ko not_active Application Discontinuation
  • 1996-12-18 JP JP52400397A patent/JP2001504027A/ja active Pending

Patent Citations (5)

Also Published As

Similar Documents

Legal Events