EP3718652B1 - Procédé de nettoyage et dispositif de nettoyage - Google Patents

Procédé de nettoyage et dispositif de nettoyage Download PDF

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Publication number
EP3718652B1
EP3718652B1 EP20168117.8A EP20168117A EP3718652B1 EP 3718652 B1 EP3718652 B1 EP 3718652B1 EP 20168117 A EP20168117 A EP 20168117A EP 3718652 B1 EP3718652 B1 EP 3718652B1
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EP
European Patent Office
Prior art keywords
nozzle
pivoting
workpiece
speed
cleaning
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP20168117.8A
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German (de)
English (en)
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EP3718652C0 (fr
EP3718652A1 (fr
Inventor
Stefan Schaal
Steffen Haas
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MAFAC Ernst Schwarz GmbH and Co KG
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MAFAC Ernst Schwarz GmbH and Co KG
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Publication of EP3718652A1 publication Critical patent/EP3718652A1/fr
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Publication of EP3718652B1 publication Critical patent/EP3718652B1/fr
Publication of EP3718652C0 publication Critical patent/EP3718652C0/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02—Cleaning by the force of jets or sprays
    • B08B3/024—Cleaning by means of spray elements moving over the surface to be cleaned
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/0221—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts
    • B05B13/0228—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts the movement of the objects being rotative
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/04—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation
    • B05B13/0405—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation with reciprocating or oscillating spray heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/04—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation
    • B05B13/0421—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation with rotating spray heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/04—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation
    • B05B13/0426—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation with spray heads moved along a closed path
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02—Cleaning by the force of jets or sprays
    • B08B3/022—Cleaning travelling work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B2203/00—Details of cleaning machines or methods involving the use or presence of liquid or steam
    • B08B2203/02—Details of machines or methods for cleaning by the force of jets or sprays
    • B08B2203/027—Pump details

Definitions

  • This description relates generally to a cleaning method and apparatus.
  • the description relates to a cleaning method using a cleaning device that has a cleaning chamber and a nozzle tube that is arranged in the cleaning chamber and can move on a revolving path around a workpiece carrier with at least one workpiece, and a corresponding cleaning device.
  • the nozzle tube comprises at least one nozzle which is directed towards the workpiece carrier and via which a cleaning liquid, such as a water-based cleaning liquid containing surfactants, can be discharged under pressure onto the at least one workpiece held by the workpiece carrier.
  • a cleaning liquid such as a water-based cleaning liquid containing surfactants
  • the nozzle tube of such a cleaning device can be implemented in such a way that the nozzle can be pivoted about a longitudinal axis of the nozzle tube.
  • an angle of impact of a cleaning jet emitted through the nozzle onto the workpiece can be varied, as a result of which particularly efficient cleaning can be achieved.
  • the object on which the invention is based is to provide an improved cleaning method by means of a cleaning device which has a detachable nozzle, and to provide a corresponding cleaning device.
  • the method comprises the features of claim 1.
  • the cleaning device comprises the features of claim 12.
  • FIGS 1A and 1B each show schematically a cleaning device for cleaning one or more workpieces, wherein Figure 1A the device in a first sectional plane II running parallel to an axis of rotation AA and Figure 1B shows the device in a second sectional plane II-II running perpendicularly to the axis of rotation AA.
  • the device comprises a treatment tank 1, a nozzle device 2 arranged in the treatment tank 1 with at least one nozzle 4 and a workpiece carrier 3 arranged in the treatment tank 1 for receiving at least one workpiece 5.
  • the treatment tank 1 is shown in cross section, the remaining parts are shown in the respective side view.
  • the treatment container 1 can be designed to be pressure-resistant in order to enable the generation of a negative pressure during a cleaning process, and can have a closable or controllable outlet (not shown) for a cleaning medium in order to produce a cleaning bath surrounding the at least one workpiece 5 in the treatment container 1 to allow.
  • the workpiece 5 is in the Figures 1A and 1B shown only schematically.
  • This workpiece 5 can be a single workpiece that is held directly by the workpiece carrier 3 .
  • a large number of workpieces can lie in a workpiece basket which is held by the workpiece carrier 3 .
  • Such a workpiece basket secures the workpieces from falling out and is permeable to liquids in order to enable the workpieces to be cleaned.
  • “workpiece” therefore refers to a single workpiece or several individual workpieces that is/are held directly by the workpiece carrier 3 or a large number of workpieces that are picked up by a workpiece basket that is held by the workpiece carrier 3 .
  • the nozzle device 2 comprises at least one nozzle tube 22 with at least one nozzle 4 which has a nozzle outlet directed towards the workpiece carrier 3 or the workpiece 5 .
  • the nozzle device 2 is mounted in such a way that the at least one nozzle 4 can move on an orbit around the workpiece carrier 3 .
  • the nozzle device 2 has a first shaft 21, which is rotatably mounted in such a way that it can rotate about an axis of rotation A-A.
  • the nozzle 4 is arranged in a direction perpendicular to the axis of rotation A-A at a distance from the axis of rotation A-A or the first shaft 21 and is mounted relative to the first shaft 21 in such a way that the nozzle 4 is on a (circular) orbit around the axis of rotation A-A and the Workpiece carrier 3 moves when the first shaft 21 rotates about the axis of rotation A-A.
  • the workpiece carrier 3 can be stationary. As in figure 1 is shown, the workpiece carrier 3 can also be implemented in such a way that it can rotate about the axis of rotation AA. In this case, the workpiece carrier 3 has a second shaft 31 which is rotatably mounted in such a way that it can rotate about the axis of rotation AA.
  • the at least one nozzle 4 is arranged on a nozzle tube 22 .
  • the nozzle tube runs essentially parallel to the axis of rotation AA and is connected to the first shaft 21 by means of a feed tube 23 .
  • the first shaft 21, the feed tube 21 and the nozzle tube 22 are hollow and form a liquid channel through which cleaning liquid can reach the at least one nozzle 4 from a reservoir 24 (shown schematically) arranged outside of the treatment container 1 .
  • the reservoir 24 is connected to the shaft 21 via a line 25 and a coupling piece 26 in order to be able to supply cleaning fluid to the shaft 21 .
  • a pump (not shown) is arranged in the outer feed line 25, which is used to apply a desired pressure to the cleaning liquid.
  • a pump (not shown) is arranged in the outer feed line 25, which is used to apply a desired pressure to the cleaning liquid.
  • Such an arrangement with a reservoir 24, an outer supply line 25, a coupling piece 26 and a (hollow) shaft is generally known, so that further explanations on this are unnecessary.
  • the first shaft 21 of the nozzle device 2 and the second shaft 31 of the workpiece carrier 3 are led out of the treatment container 1 on opposite sides at respective openings 11, 12.
  • the first shaft 21 could be designed as a hollow shaft, in which the second shaft 31 is rotatably mounted, it being possible for a channel for the cleaning liquid to be formed along the second shaft 31 in the first shaft 21 .
  • This type of realization of the first and second shaft 21, 31 is known in principle and, for example, in the already mentioned EP 0 507 294 B1 described, so that further explanations are superfluous.
  • the nozzle device comprises at least one nozzle tube 22 with at least one nozzle 4.
  • a plurality of nozzles 4 can be provided on the nozzle tube 22, which are spaced apart from one another in a longitudinal direction of the nozzle tube 22.
  • the "longitudinal direction" of the nozzle tube 22 is a direction of the nozzle tube 22 parallel to the axis of rotation AA.
  • the nozzles 4 are located, for example, on an outer surface of the nozzle tube 22 and are attached to or in bores in the nozzle tube 22 .
  • Each of the nozzles 4 has a nozzle outlet which is designed to discharge cleaning liquid, which is supplied to the respective nozzle 4 via the channel formed by the first shaft 21, the feed tube 23 and the nozzle tube 22, in the direction of the workpiece 5.
  • the nozzles 4 can be implemented in any conventionally known manner. According to one example, it is provided that separate nozzles arranged on the nozzle tube 22 are dispensed with and the nozzles 4 are formed by bores in the nozzle tube 22 .
  • the nozzle arrangement can comprise a plurality of nozzle pipes 22 of the type explained above, each of these nozzle pipes 22 having at least one nozzle 4 .
  • the in Figure 1B shown example four such nozzle pipes 22 are shown, which are based on the axis of rotation AA at an angular distance of 90 ° relative to each other.
  • the provision of four nozzle pipes 22 is only an example.
  • the nozzle arrangement 2 comprises two opposite nozzle tubes 22, or even just one nozzle tube 22.
  • the first shaft 21 of the nozzle arrangement 2 and, optionally, the second shaft 31 of the workpiece carrier 3 are driven independently of one another by a respective motor, a first motor 6, which drives the first shaft 21 of the nozzle arrangement 2, and a second motor 7, which drives the second shaft 31 of the workpiece carrier 3 drives.
  • a rotational speed of the nozzle tube 22 around the workpiece carrier 3 (and the at least one workpiece 5 held thereby) and a rotational speed of the workpiece carrier 3 and the workpiece 5 can be adjusted independently of one another, with the rotational speed of the workpiece carrier 3 being able to be zero or not equal to zero.
  • the two motors 6, 7 are controlled by a controller 8, which specifies the speeds of the motors 6, 7, with the speed of the first motor 6 determining the rotational speed of the nozzle tube 22 around the workpiece carrier 3 and the workpiece 5, and the speed of the second motor 7 determines the rotational speed of the workpiece carrier 3 and the workpiece 5.
  • the at least one nozzle tube 22 with the at least one nozzle 4 is pivotably mounted such that the nozzle tube 22 can pivot about a longitudinal axis BB, which runs essentially parallel to the axis of rotation AA, within a predetermined pivoting range. This is explained below with the help of figure 2 explained.
  • FIG. 1 shows schematically a cross section through the nozzle tube 22 in a sectional plane running perpendicularly to the longitudinal axis BB. is shown in figure 2 also a cross-section through the workpiece 5, which in this example is cylindrical for illustrative purposes only.
  • the workpiece carrier 3 is in figure 2 not shown.
  • the pivoting range of the nozzle tube 22 includes a position of the nozzle tube 22 in which the outlet of the nozzle 4 points to the axis of rotation AA.
  • a jet 42 which is emitted through the nozzle 4 in this position of the nozzle tube 22, is in figure 2 shown in dotted lines.
  • This position of the nozzle tube 22 is also referred to below as the zero position 410 .
  • the nozzle tube 22 can be pivoted or deflected on both sides with respect to the zero position 41 0 , with there being a respective end point 41 1 , 41 2 in both directions. Cleaning jets emitted through the nozzle 4 when the nozzle pipe 22 is in the first and second end points 41 1 , 41 2 are in figure 2 also shown in dotted lines.
  • An angular range ⁇ between the first end point 41 1 and the second end point 41 2 is referred to below as the pivoting range of the nozzle tube 22 .
  • This pivoting range is, for example, between 10° and 80°, in particular between 30° and 70°.
  • the first end position 41 1 and the second end position 41 2 are symmetrical to the zero position 41 0 , so that the nozzle tube 22 can pivot equally far in both directions, starting from the zero position 41 0 , i.e. a first angular distance ⁇ 1 between the zero position 41 0 and the first end position 41 1 is equal to a second angular distance y2 between the zero position 41 0 and the second end position 41 2 .
  • this is just an example.
  • the end positions 41 1 , 41 2 are asymmetrical to the zero position 41 0 , so that the nozzle tube 22 can pivot to different extents, starting from the zero position 41 0 in the direction of the first end position 41 1 and in the direction of the second end position 41 2 .
  • the nozzle tube 22 is controlled during the cleaning process in such a way that the nozzle tube 22 pivots cyclically from the first end position 41 1 to the second end position 41 2 and back to the first end position 41 1 , thereby sweeping over the zero position 41 0 in each case.
  • Such a movement is hereinafter referred to as full pivoting movement.
  • an impact angle at which the cleaning jet 42 strikes a surface 51 of the workpiece 5 changes repeatedly, as does a speed of the cleaning jet relative to the workpiece surface 5.
  • a particularly efficient cleaning of the workpiece 5 can thereby be achieved.
  • the change in the impact angle and the speed of the cleaning jet relative to the workpiece surface 51 will be explained below.
  • an integral number n of complete pivoting movements are carried out by the nozzle pipe 22 per revolution of the nozzle pipe 22 around the workpiece carrier 3 .
  • This number n is, for example, between 1 and 7, in particular between 5 and 5.
  • a rotational movement of the nozzle tube 22 around the workpiece carrier 3 and a pivoting movement of the nozzle tube 22 are coordinated with one another in such a way that a specified point on the surface 51 of the workpiece 5 is repeatedly hit by the cleaning jet 42 within a specified period of time, each time at a different angle is hit.
  • the predefined time period is, for example, between 1 minute (min) and 10 minutes, in particular between 1 minute and 10 minutes.
  • the workpiece surface 51 moves at a speed v5 in a first direction relative to the nozzle tube 22 .
  • a specific point 5 on the workpiece surface moves at the speed v5 relative to the nozzle tube 22.
  • This is achieved, for example, (a) in that the second shaft 31, which drives the workpiece 5, rotates in a first direction of rotation and the first shaft 21, which increases the rotational speed of the nozzle tube 22 by the Workpiece 5 rotates in a second direction of rotation opposite to the first direction of rotation, or (b) that the second shaft 31 rotates in the first direction of rotation and the first shaft 21 also rotates in the first direction of rotation, but at a lower rotational speed than the second shaft 31.
  • the speed v5 at which the surface 51 of the workpiece 5 moves relative to the nozzle tube 22 would be zero (0) if the two shafts 21, 31 were stationary or if they had the same speed of rotation and the same direction of rotation.
  • the speed at which the cleaning jet is guided along the surface of the workpiece 5 would be higher than the relative speed v5 of the workpiece surface 51 correspond to the nozzle tube 22.
  • a speed of the nozzle jet relative to the workpiece surface 51 resulting from the pivoting movement and the relative movement of the workpiece surface 51 relative to the nozzle tube 22 are superimposed, so that the speed at which the cleaning jet is guided along the workpiece surface 51 varies.
  • an impact angle at which the cleaning jet 42 strikes the workpiece surface 51 varies.
  • each time at a different angle of incidence provision can be made to couple the pivoting movement of the nozzle tube 22 firmly to the rotary movement of the nozzle tube around the workpiece carrier in such a way that that each position of the nozzle tube 22 on the orbit is clearly assigned an angular position ⁇ of the nozzle tube 22 and a rotational speed ⁇ 31 of the shaft 31 of the workpiece carrier 3 and one the rotational speed of the nozzle tube 22 in order to suitably set the rotational speed ⁇ 21 of the shaft 21 of the nozzle device 2, which speed determines the workpiece carrier 3, and to keep it at the respectively specified value during the specified period of time.
  • the nozzle pipe 22 completes 10 pivoting movements per minute (in which two rotations of the nozzle pipe take place).
  • the same swiveling state of the nozzle tube 22 is repeated every 1/10 min, with each time the same swiveling state being repeated, a different point on the surface 51 is hit by the cleaning jet 42 .
  • Each "pivoting condition" is determined by a pivoting angle of the nozzle pipe 22 and a pivoting direction.
  • each pivot angle (except for the two angles at the reversal points of the pivotal movement) occurs twice, once when the nozzle tube 22 pivots in one direction and once when the nozzle tube pivots back. Since the swiveling directions of the two swiveling states are different, in which the nozzle tube 22 has the same swivel angle, the workpiece surface is hit at essentially the same angle in these two swivel states, but the speeds at which the cleaning jet 42 sweeps over the workpiece surface 51 differ, as explained further below.
  • positions of the workpiece that are hit by the cleaning jet in a specific pivoting state of the nozzle tube 22 are given by: a + i ⁇ ⁇ 31 ⁇ ⁇ 21 ⁇ T R ⁇ 2 ⁇ n ⁇ ⁇ 21 ⁇ T R model 2 ⁇ for 0 ⁇ i ⁇ n ⁇ ⁇ 21 ⁇ T R ⁇ 1 the individual parameters, in particular the two angular velocities, are selected in such a way that the values are different in pairs, that is to say that no two values are the same. In this case, a particularly efficient cleaning of the workpiece 5 is achieved.
  • the nozzle 4 has a relative speed v5 compared to the surface 51 of the workpiece 5 due to the peripheral speed ⁇ 21 (and possibly the rotational movement of the workpiece 5).
  • this relative speed v5 and the associated Pivoting of the at least one nozzle 4 are coordinated so that a speed v REL at which the cleaning jet 42 moves at least once over a specified point is less than 50%, less than 30% or less than 10% of the relative speed v5 is. This is also based on figure 2 explained.
  • v4 designates a speed at which the cleaning jet moves relative to the workpiece surface 51 due to the pivoting movement of the nozzle tube 22 .
  • the direction in which the cleaning jet moves relative to the workpiece surface 51 and also relative to the axis of rotation AA is dependent on the momentary pivoting direction of the nozzle tube 22.
  • the cleaning jet moves in the first direction relative to the workpiece surface 51 moves when the nozzle tube 22 pivots from the first end point 41 1 to the second end point 41 2
  • the nozzle jet moves relative to the workpiece surface 51 in an opposite second direction when the cleaning jet moves from the second end position 41 2 back to the first End position 41 1 pivots.
  • the relative speed v REL of the cleaning jet in relation to the workpiece surface 51 is temporarily lower than with a static cleaning jet at the same Relative speed v5 of the workpiece surface compared to the nozzle tube would be the case.
  • This relative speed v REL is given by the difference v5-v4 of the two speeds v5 and v4.
  • the cleaning jet even stands still at times over a point on the workpiece surface 51, with the angle of incidence of the cleaning jet changing over time.
  • Such a “standstill” of the cleaning jet over a point on the workpiece surface 51 ensures a particularly intensive cleaning of the respective point on the surface because of the longer exposure of this point to the cleaning jet 42 and because of the changing impact angle.
  • Such a point is referred to below as an intensive cleaning point or hotspot. The emergence of such an intensive cleaning point during a cleaning process is subsequently based on the Figures 3A to 3C explained.
  • FIGS 3A-3C schematically illustrate the position of a specific point P5 of the workpiece surface 51 at different points in time t1, t2, t3 during the cleaning process. It is assumed in each case that the workpiece surface 51, and thus also the point P5 of the workpiece surface 51, moves at the speed v5 relative to the nozzle tube 22. This point P5 is located to the in Figure 3A illustrated first point in time at a first position.
  • Figure 3B shows the arrangement at a second point in time t2, at which position P5 has moved further in the first direction due to the movement of workpiece surface 51 relative to nozzle tube 22, with cleaning jet 41 also moving further due to the pivoting movement on workpiece surface 51, specifically at the in Figure 3B illustrated example just as far as the point P5, so that the cleaning jet 41 is quasi stationary at the point p5.
  • Figure 3C shows the arrangement at a third point in time t3, at which point P5 and, in the same way, cleaning jet 41 have moved further in the first direction, so that cleaning jet 41 continues to be quasi-stationary at point P5.
  • the point P5 of the workpiece surface 51 forms a hotspot, as explained above. If several nozzles 4 are provided along the longitudinal direction of the nozzle pipe 22, the workpiece 5 can be intensively cleaned at several points lying next to one another at the same time.
  • v 4 ⁇ 22 ⁇ i.e 2 g
  • d2(y) denotes a distance between the workpiece surface 51 and the axis of rotation BB of the nozzle tube 22, this distance being dependent on the respective pivoting angle ⁇ .
  • the above derivation is based on the idealized assumption that the workpiece 5 is cylindrical, i.e. that a distance from the workpiece surface 51 to the axis of rotation A-A is the same everywhere. This is usually not the case. Nevertheless, based on this derivation, the rotation speeds ⁇ 31, ⁇ 21 can be adjusted in such a way that an efficient cleaning process is achieved.
  • an averaged workpiece surface 51 can be assumed to determine the distance d1 from the workpiece surface 51 to the axis of rotation A-A or the distance d2 from the pivot axis B-B to the workpiece surface 51, which corresponds to an average distance of all points on the workpiece surface to be cleaned from the axis of rotation A-A represented.
  • the nozzle arrangement 2 can be realized in such a way that the pivoting movement of the nozzle tube 22 is coupled so tightly to the revolving movement of the nozzle tube 22 around the workpiece 5 that every position of the nozzle tube 22 the orbit, ie each angular position of the first shaft 21 relative to a starting point, is associated with a specific angular position of the nozzle tube 22.
  • every position of the nozzle tube 22 the orbit ie each angular position of the first shaft 21 relative to a starting point
  • a whole number n of complete pivoting movements of the nozzle tube 22 are carried out.
  • n hotspots can be generated per revolution of the nozzle tube 22, since the nozzle jet moves n times due to the pivoting movement of the nozzle tube 22 in the same direction as the workpiece surface 51 relative to the nozzle tube 22.
  • the pivoting speed of the nozzle tube 22 is in in this case directly dependent on the rotational speed ⁇ 21 of the first shaft 21.
  • T HS determines the duration during which the workpiece surface 51 and the cleaning jet move in the same direction, and thus the maximum duration during which a hotspot can (theoretically) occur.
  • the pivoting speed is therefore dependent on the rotational speed ⁇ 21 of the nozzle pipe and the number n of hotspots to be generated, and increases with increasing rotational speed ⁇ 21 and with the number n of hotspots.
  • the distance d2(y) of the nozzle to the workpiece surface 51 changes depending on the angular position ⁇ of the nozzle tube 22, so that according to equation (5) the relative speed v4 of the nozzle jet compared to the workpiece surface 51 depends not only on the pivoting speed ⁇ 22, but is also dependent on the varying distance d2(y), with the relative speed v4 increasing with increasing distance and thus with increasing deflection of the nozzle 4 in relation to the zero position 410 at a constant pivoting speed ⁇ 22.
  • the pivoting speed ⁇ 22 is approximately constant.
  • the distance d2(y) and thus the relative speed v4 is approximately constant, so that the rotational speeds ⁇ 21, ⁇ 31 of the two shafts, taking into account equations (6) and (9) can be determined, with d2 in this case being the distance between the workpiece surface 51 and the pivot axis BB in the zero position 410 .
  • the pivoting speed In order to increase the angular range in which a hotspot occurs around the zero position, one example provides for the pivoting speed to be varied in such a way that it decreases with increasing deflection of the nozzle in relation to the zero position 410 , and increases with increasing deflection to compensate for distance.
  • the pivoting movement could take place in such a way that the nozzle tube pivots in a first pivoting range ⁇ 0+ ⁇ 1 ⁇ 0- ⁇ 1, which is around an angle ⁇ 0 of the zero position, at a first pivoting speed and in a second and third pivoting range ⁇ > ⁇ 0+ ⁇ 1 and ⁇ 0- ⁇ 1, which are outside the first pivoting range, pivots at a second pivoting speed that is lower than the first pivoting speed.
  • a pivoting movement of the nozzle tube 22 coupled to the rotational movement of the nozzle tube 22 can be achieved in a wide variety of ways.
  • An example of this is in the Figures 4A-4D shown.
  • the Figures 4A-4C each show a section of the pivotable nozzle tube 22, the feed tube 23 and a pivoting device 27 coupled to the nozzle tube 22 and
  • FIGS Figure 4D shows a top view of a cam track 271 of the pivoting device 27.
  • FIG. 4A-4C includes the pivoting device 27, a lever assembly 272 which is mechanically coupled to the nozzle tube 22 on the one hand and the cam track on the other hand.
  • the lever arrangement 272 is coupled to the cam track using rollers, but it could also be done using one or more gear wheels or in another suitable manner.
  • the clear assignment of a position on the orbit to a pivoting position of the nozzle tube is based on a radial distance between the cam track 271 and the orbit of the nozzle tube 22, based on the axis of rotation AA.
  • the orbit of the nozzle tube is essentially circular and has a radius that is essentially determined by the length of the feed tube 23 and the radius of the first shaft 21.
  • the cam disk 271 is non-circular, so that a radial distance between the cam disk 271 and the nozzle pipe 22, or its orbit, varies during a revolution of the nozzle pipe 22 around the workpiece 3.
  • the lever arrangement 272 converts this varying distance into a pivoting movement of the nozzle tube 22 in such a way that the nozzle tube 22 pivots in one direction when the nozzle tube 22 is in a section of its orbit in which the distance from the cam track 271 increases, and in pivots in an opposite direction when the nozzle pipe 22 is in a portion of its orbit where the distance from the cam track 271 decreases.
  • the first and second cam track sections are each implemented symmetrically with respect to the turning points and that the cam disc is arranged in such a way that corresponding turning points are equidistant from the orbit.
  • the individual pivoting movements always take place in the same way, i.e. within the angular range and with the same progression of the pivoting speed within a pivoting process, with this pivoting speed being able to vary within a pivoting process.
  • the pivoting device shown is just one of many possible examples by which the pivoting movement of the nozzle tube 22 can be coupled to the revolving movement of the nozzle tube 22 .
  • an angular position of the first shaft 21 is detected by means of a rotary encoder and that the nozzle tube 22 is pivoted by a motor-driven or hydraulically-driven actuating unit depending on the detected angular position.
  • a control unit could be dependent on an angular position of the first shaft 21 via a lever arrangement in the Figures 4A-4C shown type cause a pivoting movement of the nozzle tube.
  • FIG. 12 illustrates cleaning jets which are emitted during an orbit of the nozzle tube 22 around the workpiece carrier 3 or the workpiece 5, with the nozzle tube in this example being completely rotated five times during one orbit pans. Accordingly, there are five hotspot areas HS1-HS5, i.e. five areas of an orbit of the nozzle tube 22 in which a hotspot can occur if the rotational speeds ⁇ 21, ⁇ 31 of the first and second shafts 21, 31, for example according to equations (3) and (6 ) can be suitably adapted to each other.
  • the two motors 6, 7 can be controlled by, for example, detecting the rotational speeds of the two shafts 21, 31 using rotary encoders, comparing these rotational speeds with the setpoint values and controlling the motors 6, 7 depending on the comparison results.
  • the rotational speed of the nozzle tube could, for example, accelerate temporarily due to gravity whenever the nozzle tube 22 moves from a highest point on the orbit (above in the example according to Figure 1B ) moved to a lowest point on the orbit (below in the example according to Figure 1B ) is moving, momentarily slowing down whenever the nozzle tube 22 moves from the lowest point in orbit (above in the example of Figure 1B ) moved to the highest point on the orbit.

Landscapes

  • Cleaning By Liquid Or Steam (AREA)
  • Cleaning In General (AREA)
  • Cleaning Or Drying Semiconductors (AREA)

Claims (13)

  1. Procédé comprenant :
    le nettoyage d'au moins une pièce (5), qui est maintenue dans un récipient de traitement (1) par un porte-pièce (3), au moyen d'au moins une buse (4) qui émet un jet de nettoyage (42) dirigé vers la pièce,
    dans lequel le nettoyage comprend :
    la prédétermination d'une vitesse de rotation (ω31) du porte-pièce (3) et d'une vitesse de déplacement circulaire (ω21) de l'au moins une buse (4) sur une orbite autour du porte-pièce (3) ;
    la rotation du porte-pièce (3) à la vitesse de rotation spécifiée (ω31) ; et
    le déplacement de l'au moins une buse (4) à la vitesse de déplacement circulaire prédéterminée (ω21) autour du porte-pièce (3) et le pivotement de l'au moins une buse (4) par un dispositif de pivotement (27) autour d'un axe de pivotement (B-B) parallèle à un axe de rotation (A-A) du porte-pièce (3) de sorte qu'un point prédéterminé sur une surface (51) de la pièce (5) est frappé à plusieurs reprises par le jet de nettoyage (42) pendant une période prédéterminée, chaque fois sous un angle différent,
    caractérisé en ce que l'au moins une buse (4) est disposée sur un tube de buse (22), et
    dans lequel le dispositif de pivotement (27) comprend :
    une piste de came non circulaire (271) ;
    un agencement de levier (272) qui est couplé entre la piste de came (271) et le tube de buse (22) et qui est conçu pour régler un angle de pivotement du tube de buse (22) en fonction d'une distance radiale actuelle du tube de buse (22) avec la piste de came (271).
  2. Procédé selon la revendication 1, dans lequel une position angulaire de l'au moins une buse (4) lors du mouvement de pivotement est clairement affectée à chaque position de l'au moins une buse (4) sur l'orbite.
  3. Procédé selon l'une quelconque des revendications précédentes,
    dans lequel la buse présente une vitesse relative (v5) par rapport au point prédéterminé sur la surface (51) de la pièce (5) sur la base de la vitesse de déplacement circulaire (ω21), et
    dans lequel la vitesse relative (v5) et une vitesse de pivotement liée au pivotement de l'au moins une buse (4) sont coordonnées l'une avec l'autre de manière à ce qu'une vitesse (vREL) à laquelle le jet de nettoyage (42) se déplace sur un point prédéterminé au moins une fois, représente moins de 50 %, moins de 30 % ou moins de 10 % de la vitesse relative (v5).
  4. Procédé selon l'une quelconque des revendications précédentes, dans lequel une vitesse de pivotement de la buse (4) liée au pivotement de l'au moins une buse (4) varie de sorte que la vitesse de pivotement ralentit avec l'augmentation de la déviation par rapport à une position zéro (410), dans laquelle le jet de nettoyage (42) est dirigé vers l'axe de rotation (A-A) .
  5. Procédé selon l'une quelconque des revendications précédentes,
    dans lequel l'au moins une buse (4) est disposée sur un tube de buse (22),
    dans lequel le pivotement de l'au moins une buse (4) comprend un pivotement du tube de buse autour de l'axe de pivotement (B-B).
  6. Procédé selon l'une quelconque des revendications précédentes,
    dans lequel le pivotement de l'au moins une buse (4) par tour de l'au moins une buse autour du porte-pièce consiste à faire pivoter la buse (4) n fois d'un premier point d'extrémité (411) à un second point d'extrémité (412) et de nouveau au premier point d'extrémité (411), où n>1.
  7. Procédé selon l'une quelconque des revendications précédentes,
    dans lequel le pivotement de l'au moins une buse (4) comprend un pivotement dans une plage angulaire comprise entre 30° et 70°.
  8. Procédé selon l'une quelconque des revendications 1 à 7, dans lequel la vitesse de rotation (ω31) est nulle.
  9. Procédé selon l'une quelconque des revendications 1 à 7, dans lequel la vitesse de rotation (ω31) n'est pas nulle.
  10. Procédé selon la revendication 9, dans lequel l'au moins une buse (4) tourne dans le sens contraire de la rotation du porte-pièce (3) sur l'orbite.
  11. Procédé selon l'une quelconque des revendications précédentes, dans lequel la vitesse de rotation (ω31) et la vitesse de déplacement circulaire (ω21) sont chacune sensiblement constantes pendant la période prédéterminée.
  12. Dispositif de nettoyage comprenant :
    un récipient de traitement (1) ;
    un porte-pièce (3) disposé dans le récipient de traitement (1) et conçu pour recevoir au moins une pièce (5) ;
    au moins une buse (4) qui est conçue pour émettre un jet de nettoyage (42) dirigé vers le porte-pièce et qui est montée de sorte qu'elle peut se déplacer sur une orbite autour du porte-pièce (3) et qu'elle peut pivoter autour d'un axe de pivotement (B-B) parallèle à l'axe de rotation (A-A) du porte-pièce (3) ;
    un dispositif de pivotement (27) qui est conçu pour faire pivoter l'au moins une buse (4) ; et
    un dispositif de commande (8) qui est conçu pour commander un déplacement circulaire de l'au moins une buse (4) sur l'orbite et un mouvement de pivotement de l'au moins une buse (4) de sorte qu'un point prédéterminé sur une surface (51) de la pièce (5) est frappé plusieurs fois par le jet de nettoyage (42) pendant une période prédéterminée, chaque fois sous un angle différent,
    caractérisé en ce que l'au moins une buse (4) est disposée sur un tube de buse (22), et
    dans lequel le dispositif de pivotement (27) comprend :
    une piste de came non circulaire (271) ;
    un agencement de levier (272) qui est couplé entre la piste de came (271) et le tube de buse (22) et qui est conçu pour régler un angle de pivotement du tube de buse (22) en fonction d'une distance radiale actuelle du tube de buse (22) avec la piste de came (271) .
  13. Dispositif de nettoyage selon la revendication 12, dans lequel le dispositif de pivotement (27) est conçu de manière à ce qu'une position angulaire de l'au moins une buse (4) lors du mouvement de pivotement est clairement affectée à chaque position de l'au moins une buse (4) sur l'orbite.
EP20168117.8A 2019-04-04 2020-04-04 Procédé de nettoyage et dispositif de nettoyage Active EP3718652B1 (fr)

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BE1029033B1 (nl) * 2021-01-20 2022-08-23 Laborex Bv Inrichting voor het reinigen van objecten en werkwijze om een object te reinigen
CN113000251B (zh) * 2021-02-04 2022-11-01 徐州斯普瑞喷涂有限公司 一种机械加工用的多角度刷漆装置
JP2022138907A (ja) * 2021-03-11 2022-09-26 キオクシア株式会社 基板洗浄装置および基板洗浄方法
CN113117939A (zh) * 2021-05-26 2021-07-16 江西汇有美智能涂装科技有限公司 一种喷漆设备
CN113731913A (zh) * 2021-09-07 2021-12-03 鹏知创科技(深圳)有限公司 一种三维高压水射流清洗方法
CN114345594B (zh) * 2022-02-15 2022-12-02 东莞市尔必地机器人有限公司 一种板材自动化喷漆装置
CN115318490B (zh) * 2022-08-22 2023-09-26 上海福阜机械科技有限公司 一种货架托盘防水耐磨喷涂工艺

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DE4111099C1 (fr) * 1991-04-05 1992-10-15 Mafac Ernst Schwarz Gmbh & Co. Kg, 7297 Alpirsbach, De
DE10216285B4 (de) * 2002-04-12 2012-03-29 Mafac Ernst Schwarz Gmbh & Co. Kg Maschinenfabrik Reinigungsvorrichtung zur Reinigung von Werkstücken
DE102004046802B3 (de) * 2004-09-27 2006-04-27 Mafac Ernst Schwarz Gmbh & Co. Kg Maschinenfabrik Behandlungsvorrichtung und Verfahren zur reinigenden und/oder trocknenden Behandlung von Werkstücken
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EP3718652C0 (fr) 2023-09-06
US20220388039A1 (en) 2022-12-08
DE102019108913A1 (de) 2020-10-08
EP3718652A1 (fr) 2020-10-07
US11638936B2 (en) 2023-05-02

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