FR2714918A1 - Rotary drum device for the degreasing of mechanical parts. - Google Patents

Abstract

Degreasing device comprising a rotating barrel (10) supporting the parts to be treated, driven so as to have part holding locations (11) facing a loading and unloading station, and facing washing stations. The degreasing device comprises an indexing disc (20) driven by the motor shaft (3) and an indexing arm (21) provided with an indexing roller (22) which cooperate with notches (23) of the indexing disc (21), the number of which corresponds to the number of part holding locations (11), to adjust the angular position of the rotary barrel (10) during the loading and unloading of the parts.

Description

The present invention relates to a device for degreasing parts

mechanical parts

  for the automotive industry.

  It is well known that it is necessary, after machining or molding of certain mechanical parts, deburring and cleaning before assembly or control. Such an operation is what is usually called degreasing. It is a question of degreasing in particular mechanical parts for automobiles, for example engine parts, transmission parts,

suspension parts or the like.

  Degreasing devices are already known comprising a belt on which the part to be degreased is disposed and a multitude of degreasing stations arranged linearly along the belt. These washing stations, are equipped with nozzles which project on the part, which is fixed to the carpet, a solution of degreasing under pressure. These devices therefore allow deburring and cleaning mechanical parts automatically, that is to say without human intervention. However, this type of degreasing device has a major disadvantage. Indeed, the faces of the part located against the carpet are not easily reached by the jet produced by the nozzles of the

washing stations.

  There are degreasing devices in the prior art that overcome this disadvantage. For example, a degreasing device is known that is equipped with a rotating article carrier on which the parts to be subjected to

  treatments for their degreasing.

  This carrier is driven step by step by a motor shaft, so as to have support locations provided on the carrier in front of several washing stations from which can be projected a degreasing solution under pressure on the workpiece, or in which the piece can be soaked in a bath of degreasing solution. The support locations of these devices are provided with locking devices for holding the workpiece in the carrier during rotation thereof. This device also comprises washing systems connected to the locking device, so that a piece held by the locking device is also maintained by the washing systems. Thus, all the faces of the mechanical part undergo a degreasing treatment. The loading and unloading of the rotating article carrier takes place during the rotation of this one, presenting a

  support location next to a transfer system.

  The washing systems are then no longer supplied with fluid

  degreasing to avoid wasting fluid.

  It is necessary that such degreasing devices firmly hold the room when it undergoes the various treatments. In the known devices of the prior art, the support locations which are presented at a mechanical part, during the loading operation, are rotated by a motor. This engine, which is for example a hydraulic motor, allows only imprecise positioning of the support location, ie to the nearest millimeter, which is insufficient for

an effective grip of the room.

  The present invention aims to overcome this drawback by proposing a degreasing device, in which a mechanical part undergoing a degreasing treatment for all its faces is maintained precisely in a location.

of support.

  Another object of the invention is to provide a degreasing device for detecting the moment at which a support location is in position at the level of

  a coin transfer system.

  To this end, the present invention relates to a device for degreasing metal parts comprising a rotary barrel supporting the workpieces, driven step by step by a motor shaft so as to have part holding locations provided on said rotating cylinder opposite. a loading and unloading station for carrying out loading and unloading operations of the parts, and next to the washing stations at which the parts are treated, each part holding location comprising locking means intended to maintain the parts during rotation the rotary barrel

and washing means.

  According to the invention, the degreasing device comprises an indexing disc driven by the drive shaft and an indexing arm provided with an indexing roller which cooperate with notches of the indexing disc whose number corresponds to the number of part holding locations, to adjust the angular position of the rotary drum during the

  loading and unloading parts.

  In various embodiments, the invention comprises the following features, taken separately or in all their technically possible combinations: each part holding place comprises a locking arm provided with a locking roller which cooperates with a locking yoke formed in the indexing arm, for implementing and releasing the blocking means which correspond to them, when the indexing roller is inserted into a notch of the indexing disk corresponding to the position of

  loading and unloading of said location.

  - The degreasing device comprises a fixed locking retaining disk for receiving the locking rollers to maintain the position of the locking means; - The locking retaining disk has an opening at which the locking rollers fit into the locking yoke; - The indexing roller and the locking rollers are movable about an axis; the notches are provided with wear plates; - The device comprises a fixed sensor placed near the indexing disc so as to detect the passage of the wear plates for operating control means of the indexing arm; in the latter case, the control means comprise a hydraulic piston; - The motor shaft comprises a rotary casing adapted to supply degreasing fluid to the rotary barrel; - The degreasing device also comprises arms, the number of which corresponds to the number of part holding locations, supplying degreasing fluid washing means, from the rotary housing; each locking arm comprises means for stopping the supply of the washing means, when the locking means are not actuated; the motor shaft is driven by a hydraulic motor via an orientation ring and drive gears enclosed in a chamber

waterproof filled with lubricant.

  Various other features and benefits will emerge

  of the description of a particular embodiment of

  the invention, given by way of example and without limitation and with reference to the accompanying drawings, in which: Figure 1 is a simplified sectional view

  longitudinal device of the invention.

  Figure 2 is a front view of the device

shown in Figure 1.

  The degreasing device is designated as a whole by the reference 1; it is intended to deburr and

clean mechanical parts 2.

  This degreasing device 1 comprises a rotary barrel 10 to which the parts to be treated 2 are fixed. This rotary barrel is rotated by a driving shaft 3 integral with an orientation ring 40. This orientation ring 40 is provided with crown sprockets 41 which cooperate with drive sprockets 42 of a hydraulic motor 4. Preferably, it drives, through the orientation ring 40 and the shaft

  motor 3, in rotation step by step, the rotary barrel 10.

  This barrel 10 has holding locations

  11 of which 4 are regularly placed on this

  ci, and opposite two by two. In order to simplify Figure 2, only the part holding locations 11-1 and part of the location 11-3 have been shown, location 11-4 not being shown. Each location is intended to receive a part 2 which is held by a blocking device 100 against positioning pins

  arranged on a coin gripping jaw 130.

  This degreasing device 1 operates in combination with a coin transfer device, and with washing stations (not shown). It will therefore be understood that the number of part holding locations being according to this embodiment of which there are four, the washing stations are three in number. The coin transfer device comprises in known manner a set of parallel bars on which are placed the parts to be treated, which define a location for loading and unloading parts. These parallel bars are driven by a square movement and a movement by translation, which allows between the rotational phases of the hydraulic motor 4 to unload from the rotating barrel a piece that has been treated and replace it with a piece that has not been defatted yet. When a workpiece has been placed in the workpiece holding locations 11, the hydraulic motor 4 rotates the rotatable barrel 11 by about 90 so as to place this work holding location opposite a wash station at the same time. of which the part 2 maintained undergoes a degreasing treatment which may be a projection of pressurized degreasing liquid or a bath. In this position, another part holding location is located next to the loading and unloading station to perform the loading and unloading operations.

  unloading of parts which have been described above.

  The degreasing device 1 further comprises washing means 110 placed on the blocking means 100 which

  press the piece 2 against the positioning pins 120.

  Thus, the pressure exerted on this part 2 is via these washing means 110 which project on the face of the part situated opposite this blocking device a degreasing solution. All faces of this part can then undergo a degreasing treatment. The pressure exerted by the locking device is via the washing means 110, the treatment

  performed by them is very effective.

  The degreasing device 1 comprises an indexing disk 20 parallel to the rotary barrel 10, and fixed to the rotary shaft 3 so as to be driven stepwise, as well as a fixed indexing arm 21. The indexing disc 20 comprises notches 23 regularly spaced, the number of which corresponds to the number of part locations 11. The indexing disc has four notches each

  corresponds to a part holding location.

  The indexing arm 21 comprises at one end an indexing roller 22 and a locking yoke 15. It is preferably placed perpendicularly to the indexing disc 20, so that its indexing roller 22, movable around an axis 210, rolls on it. This indexing arm is also articulated about an axis 211 and is actuated at the other end by a hydraulic cylinder 25, between two positions

limits 21-1 and 21-2.

  The indexing disc 20 preferably comprises

  wear plates 24 which are placed in the bottom of the notches 23.

  The degreasing device 1 further comprises a sensor 5 placed near the indexing disc 20 and directed towards it, so that it detects the passage of the wear plates 24. It then actuates the jack hydraulic 25 which tilts the indexing arm 21 to place the indexing roller 22 in the notch 23. Thus, the indexing disc is fixed to the motor shaft 3, it allows to fix very precisely the angular position of it. The hydraulic motor 4, by its structure, generates uncertainties in positioning the rotary barrel 10 of the order of a millimeter. The indexing roller 22 when it is inserted in the notch 23 makes it possible to correct these uncertainties and to position in a very precise manner, that is to say to the nearest tenth of a millimeter, the angular position of the disk. indexing 20

and therefore the rotary barrel 10.

  Each part maintaining location 11 further comprises a locking arm 12, parallel to the drive shaft 3, provided at one end with a locking roller 13 movable about an axis 14. This locking arm 12 is also articulated about an axis 16 at the other end. Between these two ends, this arm is advantageously bent. It is located in the location of parts 11, so that when it is located next to a loading and unloading station, the locking rollers 13 are inserted into the locking yoke 15. Thus, when the indexing roller 22 is moved by the piston 25 so that it engages in the notch 23, the locking yoke 15 exerts on the locking roller a moment which tends to rotate the locking arm 12 around its articulation 16. This movement printed on the locking arm moves the locking means 100 so

to maintain a room.

  The degreasing device 1 furthermore preferably comprises a locking retaining disk 17 parallel to the indexing disc 20, but fixed in rotation. This locking retaining disk 17 has a diameter such that when the rotary drum 10 is rotated by the driving shaft 3, which causes the release of the roller 13 of the locking yoke 15, it receives the locking roller 13 in order to maintain the position of the locking means 100. Thus, the parts are held in the part holding locations 11 during the entire rotation

step by step of the rotary barrel 10.

  The locking retaining disk 17 has an opening 18 facing the transfer device, including loading and unloading stations. When the piece locking roller 13 is presented at this opening 18, it returns to its initial position, which then relocates the locking means 100 in their initial position. The room is then unlocked and can then be

  unloaded on the loading and unloading station.

  Advantageously, the motor shaft 3 comprises a rotating casing 30 for supplying the rotary barrel 10 with a degreasing fluid. This casing comprises, at a first end 7 located near the hydraulic motor 4, a valve (not shown) intended for the supplying the device with fluid. This device further comprises a set of arms 50, whose number corresponds to the number of part holding locations 11 which are connected to the casing 30, at a second end 8. These arms 50 feed through the rotary casing 30 the washing devices 110. According to this embodiment of

  the invention, the arms 50 are four in number.

  In addition, preferably, the assembly constituted by the drive gears 42 and the orientation ring 40, is closed in a sealed enclosure 6. This enclosure is filled with lubricant, for example oil, so as to bubbling all the gables. Thus, the drive of the rotary shaft 3 is not affected by the projections of degreasing fluid that could occur during the treatment of the mechanical parts 2. Thus the maintenance operations of this device are limited.

  The reference signs inserted after the characteristics

  technical features mentioned in the claims, have

  for the sole purpose of facilitating the understanding of the latter,

  and in no way limit its scope.

Claims (12)

  1. Device for degreasing mechanical parts (2) comprising a rotary drum (10) supporting the workpieces driven step by step by a motor shaft (3), so as to have part holding locations (11) provided on said rotary barrel (10) facing a loading and unloading station, and facing washing stations at which the parts are processed, each part holding location (11) having locking means (100) , and washing means (110), characterized in that it comprises an indexing disk (20) driven by the driving shaft (3) and an indexing arm (21) provided with a roller indexing (22) which cooperates with notches (23) of the indexing disk (21), the number of which corresponds to the number of part holding locations (11), for adjusting the angular position of the rotary drum (10) during the loading and unloading parts.   2. Degreasing device according to claim 1, characterized in that each part holding location (11) comprises a locking arm (12) provided with a locking roller (13) which cooperates with a locking yoke (15). ) formed in the indexing arm (21), for implementing and releasing the locking means (100) corresponding thereto, when the indexing roller (22) is inserted into the notch of the indexing disk ( 20) corresponding to the   loading and unloading position of said location.   3. degreasing device according to claim 1 or 2, characterized in that it comprises a fixed locking retaining disk (16) for receiving the locking rollers (15) to maintain the position of the means of locking (100).   4. Degreasing device according to any one of   Claims 1 to 3, characterized in that the disk of   locking retainer (16) has an opening (17) at which the locking rollers (13) fit in the locking yoke (15).   5. Degreasing device according to any one of   Claims 1 to 4, characterized in that the roller   indexing member (22) and the locking rollers (15) are movable about an axis (210, 14).   6. Degreasing device according to any one of   Claims 1 to 5, characterized in that the notches (23) are provided with wear plates (24).   7. Degreasing device according to any one of   Claims 1 to 6, characterized in that it comprises a   fixed sensor (5) placed near the indexing disc (20) so as to detect the passage of the wear plates (24) for   actuate indexing arm control means (21).   8. Degreasing device according to claim 7, characterized in that the control means comprise a hydraulic piston.   9. Degreasing device according to any one of   Claims 1 to 8, characterized in that the drive shaft (3)   comprises a rotary casing (30) capable of supplying fluid with degreasing, the barrel (10).   10. Degreasing device according to any one   Claims 1 to 9, characterized in that it comprises   arm (50), the number of which corresponds to the number of parts locations (11), supplying the degreasing fluid with the means   washing (110) from the rotating housing (30).   11. Degreasing device according to any one   Claims 1 to 10, characterized in that each arm   locking device (12) comprises means for stopping the supply of the washing means (110), when the means   blocking (100) are not actuated.   12. Degreasing device according to any one   Claims 1 to 11, characterized in that the shaft   motor (3) is driven by a hydraulic motor (4), via an orientation ring (40) and preferably drive (42) enclosed in an enclosure (6) waterproof filled with lubricant.