WO2014006304A1 - Outil de frettage de pièces mécaniques et procédé de frettage utilisant un tel outil - Google Patents
Outil de frettage de pièces mécaniques et procédé de frettage utilisant un tel outil Download PDFInfo
- Publication number
- WO2014006304A1 WO2014006304A1 PCT/FR2013/051500 FR2013051500W WO2014006304A1 WO 2014006304 A1 WO2014006304 A1 WO 2014006304A1 FR 2013051500 W FR2013051500 W FR 2013051500W WO 2014006304 A1 WO2014006304 A1 WO 2014006304A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tool
- hooping
- hoop
- fretted
- support
- 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.)
- Ceased
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P11/00—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for
- B23P11/02—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits
- B23P11/025—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits by using heat or cold
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/02—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same
- B23P19/027—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same using hydraulic or pneumatic means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
- B25B27/06—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same inserting or withdrawing sleeves or bearing races
- B25B27/064—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same inserting or withdrawing sleeves or bearing races fluid driven
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P2700/00—Indexing scheme relating to the articles being treated, e.g. manufactured, repaired, assembled, connected or other operations covered in the subgroups
- B23P2700/04—Connecting rods
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
- F16C35/02—Rigid support of bearing units; Housings, e.g. caps, covers in the case of sliding-contact bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C9/00—Bearings for crankshafts or connecting-rods; Attachment of connecting-rods
- F16C9/04—Connecting-rod bearings; Attachments thereof
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
- Y10T29/49863—Assembling or joining with prestressing of part
- Y10T29/49865—Assembling or joining with prestressing of part by temperature differential [e.g., shrink fit]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
- Y10T29/49945—Assembling or joining by driven force fit
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/53—Means to assemble or disassemble
- Y10T29/53961—Means to assemble or disassemble with work-holder for assembly
Definitions
- the present invention relates to a tool for hooping mechanical parts. It also relates to a hooping process using such a tool.
- the hooping operation involves inserting a piece into a hole or cavity in another part. This is for example the case of the insertion of titanium rings in a rod whose drilling must then receive a rotating or sliding shaft on the titanium rings.
- the hooping is the assembly of two pieces thanks to a tight fit.
- the outer part is called “fret”
- the inner part is called “fretted”.
- the ring To enable the ring to be secured to the hoop, it is known to use a forcing of the ring in the drilling of the hoop.
- the internal diameter of the bore is slightly less than the outer diameter of the ring. It is then possible to carry out a kind of press fitting of the ring in the bore and by elastic deformation and / or by material reflux, the mounting is permanent.
- the fitting or shrinking operation itself is carried out in the state of the art by shocks applied using a mallet or a hammer.
- the use of the mallet or hammer is preceded or not by soaking the part to be shrunk like a ring in a liquid nitrogen vessel in order to cool it to reduce its outside diameter.
- shock hooping is numerous.
- this type of hooping is not acceptable if one of the parts, particularly the hoop, is made of a composite material such as a molded resin type RTM (resin transfer molding).
- shock binding does not manage the forces applied to the part to be fretted or on the hoop.
- the direction and intensity of shocks are relatively random and depend on the skill of the operator.
- the piece to be shrunk like a ring is placed before the first shock in an indeterminate position relative to the drilling of the band, again at the mercy of the skill of the operator.
- the ergonomics and safety of the workstation used for hooping applied by mallet or hammer are very difficult to accept.
- MSD musculoskeletal disorders
- a hoop is constituted by a connecting rod 7 having on the left in the drawing a rod head provided with a receiving hole.
- the connecting rod 7 is deposited by the operator on a lifting table 1.
- the useful plane of the lifting table 1 carries a support 10 against which the connecting rod head 8 is supported.
- a fitting cylinder 5 is arranged so that its movable rod 9, possibly equipped with a non-visible fitting tool, makes it possible to insert a ring by force, as piece to be fretted, in the bore visible on the small end 8.
- the hooping station is arranged in a camber 2-4. It is controlled using an electrical box 6 and a control accessible by the operator (not shown). Doors 2 and 3 of the body, coupled with safety prohibits the actuation of the cylinder 5 if the doors are open, to improve the safety of the hooping station.
- Such a device makes it possible to reduce the work of force, to respect the ergonomics of the work of the operator and to prevent safety problems.
- the lift table occupies a large floor area and mobilizes masses that can be very important. Both of these characteristics remove small workshops and require significant lifting equipment.
- the hooping time must be less than that of the return of the parts to temperatures in which the respective dimensions no longer allow in fitting or hooping in force.
- the present invention relates to a tool for hooping mechanical parts, remarkable in that it comprises:
- At least one fixed part comprising a fixed jaw and at least one housing
- At least one movable portion relative to said fixed jaw having a movable jaw and at least one housing;
- said at least one support and at least one docking piece being designed for specific sets of parts to be fretted and / or hooped for the same tool;
- At least one actuator for moving said at least one moving part when the part to be fretted is detected in the hooping position on a hoop.
- At least one movable jaw cooperates with a fluid jack engaged by its movable rod through the hoop and said at least one part to be fretted during at least one step of fitting the part to be fretted on the hoop, the movable rod the cylinder being engaged on one side of the part to be shrunk and the static part of the jack being integral with said at least one fixed part;
- this tool cooperates with a mobile support arm
- the arm comprises means for balancing the weight of the tool and maneuvering means assisted by a hooping operator.
- the invention also relates to a process for shrinking mechanical parts using a tool according to the invention, remarkable in that it consists of: placing on at least one of said jaws, said at least one docking piece and said at least one support in geometric reference with at least one hoop;
- this method also comprises a preliminary step for modifying the relative dimensions of at least one of the pieces before shrinking, by cooling them in the same way as in the case of cooling, as a liquid nitrogen chamber, or by heating in an oven;
- This method consists in fretting a first ring in a bore of a big end taken as a hoop, then in a second hooping, to center two closure rings on the supports of two jaws of the tool, to arrange the shrinking tool carrying the two closure rings relative to the big end, the jaws being placed on either side of the big end, and then controlling an actuator of the tool to perform the simultaneous hooping of the two rings closure on either side of the first ring;
- this method comprises a step for mounting a plurality of supports for parts to be fretted and / or several pieces to be fretted on the hooping tool, and a step for pressing all the fretting parts mounted on the tool in a single activation of actuator of the tool.
- Figure 1 shows a device of the state of the art which has been described above;
- Figure 2 shows a circuit diagram of various parts to be fretted on a hoop
- Figure 3 shows a schematic top view of an embodiment of a hooping tool according to the invention
- Fig. 4 shows a perspective view of the embodiment of the tool of Fig. 3;
- Figures 5A to 5C show various steps of an embodiment of a hooping method according to the invention
- Figures 6A-6C show various steps of an embodiment of a hooping method according to the invention.
- Figures 7A to 7C show various steps of an embodiment of a hooping method according to the invention.
- Figure 8 shows another embodiment of a hooping tool according to the invention.
- FIG 2 there is shown a circuit diagram of various parts to be fretted on a hoop.
- the hoop here consists of an aviation connecting rod designed to support a part such as the nacelle of a turbojet on the pylon of an aircraft.
- a part such as the nacelle of a turbojet on the pylon of an aircraft.
- Such a piece is typically made of a composite material based on resin injected by molding. It has at least one rod end provided with a bore allowing the passage of a connecting shaft of the rod to a support and / or a load.
- the shaft must be able to move in a friction piece such as a titanium ring. It is then necessary to achieve the hooping of the friction ring in the big end.
- the rod 17 made of composite material has at one of its ends a big end made of two fingers 16 and 12. Each finger of the big end is provided with a hole 18 in the finger 12. Only the hooping is described. on the finger 12.
- the hole 18 must be occupied by three rings: a central ring 14 made of titanium surrounded by two closure rings 1 3 and 1 5 bronze.
- the hooping of the first ring or central ring 14 is first performed in a step S1 by forcing by force of the hammer or the fitting cylinder the ring 14 into the Hole 1 8. Then, the hooping of the closure ring 13 is carried out during a step S2 with the same technique. Finally, the closure ring 15 is shrunk during a step S3 with the same technique.
- the disadvantages of these methods and the risks they pose to the operator and the parts involved have been described above.
- the hooping method that uses the hooping tool of the invention solves these disadvantages and to prevent these risks. But moreover, it makes it possible to limit to two hooping operations, the three operations S1 to S3 that one is forced to execute according to the state of the art, as will be described later.
- FIG 3 there is shown a schematic top view of an embodiment of a hooping tool according to the invention.
- the hooping tool comprises a fixed part 21, 28, 31 and a movable part 20, 22, 24.
- the fixed part has a fixing plate 27 at the end of a manipulator arm (not shown) which will be described more far. It is provided with gripping and / or manipulation means comprising two ergonomic handles 29, 30.
- the movable part 20 is in the form of a jaw or a long leaf which is driven in translation according to a direction perpendicular to its plan of situation using an actuator 28.
- the actuator 28 of the movable jaw 20 is an actuating cylinder which comprises an electric motor 28 which drives, as well as it will be seen later, a screw which penetrates into a nut (not shown) sol ida ry delam acho ry or pl aq ue mobi 20.
- ai nsi the operator by ordering in a known manner the direction of rotation the motor 28 can move the movable jaw 20 closer to or away from the stationary facing part which comprises a fixed plate or jaw 21.
- the jack actuating the movable jaw 20 is a pneumatic cylinder whose stator is integral with the fixed part of the tool and the free end of the rod is integral with the movable jaw.
- the actuating cylinder is disposed between two movable jaws, so that they can, on command of the operator, move closer or apart as will be described later.
- one of the movable jaws acts as a fixed part for the other mobile jaw, the fixed and mobile characters being relative.
- FIG. 4 shows a perspective view of the embodiment of the tool of FIG. 3.
- the same elements of FIG. the hooping tool have the same reference numbers and are described with either Figure.
- the fixed part of the hooping tool is contained in a housing whose front face is open to allow the free end of each of the two jaws 20 and 21 to pass. Extending over the width between the two jaws, columns such as column 26 have been arranged which makes it possible to guide the relative movements of bringing the two jaws 20 and 21 closer together or away.
- the drive cylinder 34 as described has a worm whose end is visible through an opening of the housing.
- the movable jaw 20 can thus move perpendicularly to its plane of position along the screw and columns like the column 26 which prevent its rotation and force it to remain parallel to itself during the relative movements of the jaws 20 and 21 during a frettage.
- the hooping tool then comprises means 22, 23 for centering and fixing the parts to be shirred on one and / or the other of the jaws 20 and 21, and on one and / or the other face of these jaws.
- the centering and fixing means of the parts to be fretted constitute a support for a part to be fretted.
- Such a support 22, 23 cooperates with relative positioning means of the part to be fretted with respect to a position reference on the hoop.
- the workpiece support is constituted by a cylindrical tube which is intended to carry a ring like the rings 13-15 ( Figure 2).
- the position of the cylindrical tube is referenced with respect to another point of each jaw which will allow the operator to come to deposit the hooping tool in a guaranteed hooping position relative to the hoop.
- the hooping tool also has a bearing portion on the hoop so as to determine a reference position of the tool in the hooping position.
- This bearing portion is in the embodiment of Figures 3 and 4 made using docking pieces 24, 25 which are mounted on one and / or the other of the jaws 20 and 21.
- the provision of a docking piece on the hooping tool is provided so as to position the part or parts to shrink relative to a reference docking the hoop.
- a docking piece may be releasably disposed in a housing on either one of the jaws.
- Each piece of accsotage Like the piece 24, has a profile 32 adapted to come to rest on a bearing surface or docking on the hoop.
- Each docking piece is profiled according to the hoop to which it is intended. This ensures the re-use of the hooping tool for a range of frets which is not limited to the use of the hooping tool of the invention to the only given example of a connecting rod described in Figure 2.
- the support 22, 23 of a part to be engaged cooperates with relative positioning means of the part to be fretted with respect to a docking reference of the hoop.
- the fixed jaw 21 constitutes a fixed station or support for exerting the shrinking force on the hoop and on the part to be shrunk when the movable jaw 20 is driven in a movement of approaching the fixed jaw 21.
- FIGS. 5A to 5C show various steps of an embodiment of a hooping method according to the invention in which a particular embodiment of a hooping tool according to the invention has been used.
- the same elements bear the same reference numbers.
- the operator 40 has previously arranged the hoop, here an aviation rod 41 on a support 42.
- a manipulator arm 43 has an end portion 44 on which is fixed the hooping tool 45 by its plate (see 27, Fig ure 3).
- the operator loads at least one coin to be hooped onto the hooping tool 45. He grasps the hooping tool by his handles (see 29, 30 in FIG. and 3) and with minimal effort, moves the hooping tool with the part or pieces to be fretted towards the hoop 41 on the support 42.
- the manipulator arm 43 comprises means for balancing and / or assisting the operator when driving the load of the arm, here constituted by the hooping tool equipped with one or more pieces to fret. Examples of such an arm are commercially available as the manipulator arms of Dalmec.
- the head 47 of the connecting rod 41 has a determined and known profile.
- the hooping tool 45 is then equipped with at least one docking piece 46 which provides a determined guidance of the hooping tool 45 when the operator 40 approaches the big end 47.
- the operator 40 controls the activation of the drive cylinder (see 28, 34 in FIGS. 2 and 3) so that during the movement of approaching the movable jaw carrying a part to be shrunk, the piece to be engaged engages in the hole provided of the hoop 41.
- This hooping method using the hooping tool of the invention provides the following results.
- the method of the invention ensures self-centering of the parts to be fretted, such as the rings at the time of hooping. It allows a limitation of the risks of delamination of the composite when the band is made of a composite material. It avoids any stress setting of the hoop and allows the removal of shocks caused during hammering.
- the method of the invention is performed without manipulation of the coin to be fretted during the post operations but it is ensured by movements of the hooping tool around the collar thanks to the manipulator arm. This results in a real weight of the hooping tool which can be limited for example to 1 kg. This results in a risk limitation TMS (Musculoskeletal Disorders) which ensures compliance with the rules of hygiene and ergonomics. Thanks to the method of the invention, the recurrent and non-recurrent costs are controlled.
- the hooping process makes it possible to adapt the hooping tool to all references of parts to be fretted, such as rings to be mounted.
- the method of the invention finally makes it possible to manage the fitting force by controlling the force of the jack, for example by limiting its engine torque in the event of jamming during fitting by means of an automatic control system. range of the skilled person.
- FIGS. 5A-6C various steps of an embodiment of a hooping method according to the invention are shown.
- the elements common to those of FIGS. 5A to 5C have been taken up with the same reference numbers.
- It is also taken under the reference 50 a schematic representation of the shrinking tool defined with the help of Figures 3 and 4.
- the method of the invention has been applied to the hooping of a connecting rod aviation with the three rings described in Figure 2.
- FIG 6A there is shown the arrangement of the means used in one embodiment of the method of the invention.
- the method is in a state before the start of the actual hooping operation.
- Two docking pieces 54 and 55 have been arranged on housings referenced in position on the fixed and movable jaws 21. These docking pieces are easily removable so as to make it possible to process a predetermined range of pieces to be fretted and hooped. with the same tool.
- Supports ensuring the referencing in position, and the centering of a coin to be fretted are arranged in a reserve 51.
- the operator takes a support 53 to mount it in the housing provided for this purpose on the inner face of the fixed jaw 20 relative to the movable jaw 21.
- the operator in step E1, also has a support 53 'in front of the support 53.
- the support 53 ' is profiled so as to cooperate with a part of the coin to be mounted which is mounted on the support 53 vis-à-vis as will be explained later.
- the support 53 'unused here cooperates in centering means and support of the part to be fretted.
- the operator mounts a cooling ring on the centering support 53, the reference 53 designating in the drawing at the same time the titanium ring as a piece to be shirred, its support 53 vis-à-vis the support 53 'cooperating in support and centering means of the part to be fretted and the combination of the part to be fretted, here a titanium ring, and its support.
- the hooping time is then constrained by the heating time of the cooled ring.
- a step E3 the operator then moves the hooping tool 50 carrying the ring to fret towards the hoop 41 disposed on its support 42 by using the manipulator arm 43, 44.
- the hooping tool 50 has been disposed on the hoop 41 using the docking piece 54 which contacts on a hoop positioning reference surface 55 'of the hooping tool 50 on the fret 41.
- the ring to shrink on its self-centering support 53 is correctly aligned, thanks to the docking piece 54 in front of the hole 57 on the finger 56 of the big end to be hooped.
- the support 53 ' has been introduced into the hole 57 of the hoop, here the connecting rod 41.
- the portion of the support 53 'facing the support 53 carrying the ring to be fretted is profiled so as to engage in a part of the ring when the latter
- This part of the part to be shirred is preferably constituted by the bore (not shown) of the titanium ring on its support 53.
- the support 53 penetrates on one side of the bore of the bag. Ue to fretted, but conserves libre the other end of the bore by a predetermined length of the support 53 less than the thickness of the ring to fret.
- a predetermined thickness is maintained in the bore of the fretting ring supported by the support 53 to receive the guide of the support 53 'during the fitting itself of the ring in the hole 57 of the head of connecting rod. This ensures a centering or guiding of the part to be fretted during fitting.
- FIGS. 7A to 7C show various steps of an embodiment of a hooping method according to the invention.
- elements similar to those of FIGS. 6A to 6C are taken with the same reference numerals.
- the operator has two bronze locking rings (of the kind of the rings 13 and 15, Figure 2) on their self-centering support 60 and 61 after extracting them from their cold store 52 to reduce their outer diameter and facilitate their insertion on the hoop 41.
- step E8 identical to the previous step E3, the operator approaches the hooping tool 50 equipped with the closure rings of the hoop on the connecting rod 41.
- FIG. 7B the state E9 is shown in which the hooping tool 50 carrying the two rings to be shrunk on each of the fixed and movable jaws 21.
- the jaws are placed as before (FIG. 6B) on either side of the finger of the small end which has already received the ring 58 in the hole 57 (FIG. 6B).
- the operator applies the docking pieces 59 and 59 'to corresponding parts on the ends 62 and 63 of the fingers making up the big end of the connecting rod 41.
- step E10 the operator observes the alignment and the correct positioning of the closure rings on the hooping tool 50 relative to the hole in which the bag 58 has been hooped. previously, activates the drive cylinder of the movable jaw 21 on the fixed jaw 20 so that the two locking rings are shrunk on either side of the ring 58 to form a hoop 64.
- FIG. 8 there is shown another embodiment of a hooping tool according to the invention.
- a fluidic unit 70 cooperates with a fluid jack 70 disposed at the free end of the stationary and mobile parts 21 of the tool.
- This arrangement makes it possible to apply greater forces and to avoid or limit the overhang when the shrinking force is applied by the single electric jack 28 of the embodiment of the preceding figures.
- the fluidic unit 70 applies a first motor force with the aid of a first jack (not visible in FIG. whose movable rod is similar to and acts as the worm 34 of the previous embodiment.
- a second jack 71 supplied by the fluidic unit 70 using hoses not shown, has a movable rod 72 which passes through the jaws or fixed and movable portions 21.
- the body of the cylinder 71 bears on the outer face of the cylinder. fixed part 21 while the free end of the movable rod 72 of the cylinder is provided with a thread receiving a quarter turn nut 73 which allows the cylinder rod 72 to take up against the outer face of the jaw or part mobile 20.
- the first jack actuated by the fluidic unit 70 (as 34 in FIGS. 3 and 4) operates to arrange the jaws 20 and 21 in the hooping position on the hoop. Then, only the second cylinder 71, once d isposé, works for fitting. Otherwise, the first and second jacks cooperate during fitting.
- the hooping process of the invention is then modified as follows.
- the hooping tool receives fretted coin holders as taught above.
- the self-centering supports are only pierced with a bore to allow the moving rod of the jack to pass.
- the hooping tool receives the part or parts to be fretted and is approached in the hooping position on the hoop.
- the hooping process is then modified.
- the operator has disposed (left arrow, Figure 8) the second cylinder 71 bearing on the outer faces of the fixed portion 21 and movable 20. It passes the movable rod 72 of the second cylinder 70 through the openings of the tool frettage, fretted parts which are mounted thereon, and the bore on the hoop in which the fretting part (s) must be fitted. Finally, it locks the quarter turn nut 73 on the free end of the movable rod 72 of the cylinder 71. The re-entry pressure of the movable rod 72 is then controlled (arrow to the right, FIG. 8) on the pressure control unit 70 and the movable rod 72 enters the body of the jack 71. This results in a rimpedement of the movable part 20 on the fixed part 21 and a fitting of the part to be fretted on the hoop.
- the method of the invention thus has the following advantages. It ensures a control time hooping l imitated by the time of return to ambient temperature of the rings cooled with liquid nitrogen. It allows a limitation of the risks to which the human operator and the equipment are exposed in the state of the art.
- the frettage station is open to all operators without selection criteria (size, musculature, sex). In addition, investments to produce the hooping tool and to implement it in the production workshop are weak. The process provides control of recurring production costs and avoids the use of consumables.
- the method of the invention allows the low-cost re-adaptability of the hooping tool for other productions concerning other parts to fret and other frets.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automatic Assembly (AREA)
- Jigs For Machine Tools (AREA)
- Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
- Gripping On Spindles (AREA)
Description
Claims
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BR112014032869A BR112014032869A2 (pt) | 2012-07-03 | 2013-06-27 | ferramenta para encaixe por indução térmica de peças mecânicas e método para encaixe por indução térmica de peças mecânicas por meio de uma ferramenta |
| CA 2877837 CA2877837A1 (fr) | 2012-07-03 | 2013-06-27 | Outil de frettage de pieces mecaniques et procede de frettage utilisant un tel outil |
| EP13744643.1A EP2869964A1 (fr) | 2012-07-03 | 2013-06-27 | Outil de frettage de pièces mécaniques et procédé de frettage utilisant un tel outil |
| CN201380035581.6A CN104411451A (zh) | 2012-07-03 | 2013-06-27 | 用于机械部件的冷缩配合的工具及使用该工具的冷缩配合方法 |
| RU2015102971A RU2015102971A (ru) | 2012-07-03 | 2013-06-27 | Инструмент для запрессовки механических деталей и способ запрессовки с использованием такого инструмента |
| US14/584,462 US20150107082A1 (en) | 2012-07-03 | 2014-12-29 | Tool for banding mechanical components and banding method using such a tool |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1256346A FR2993022B1 (fr) | 2012-07-03 | 2012-07-03 | Outil de frettage de pieces mecaniques et procede de frettage utilisant un tel outil |
| FR12/56346 | 2012-07-03 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US14/584,462 Continuation US20150107082A1 (en) | 2012-07-03 | 2014-12-29 | Tool for banding mechanical components and banding method using such a tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2014006304A1 true WO2014006304A1 (fr) | 2014-01-09 |
Family
ID=47022798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR2013/051500 Ceased WO2014006304A1 (fr) | 2012-07-03 | 2013-06-27 | Outil de frettage de pièces mécaniques et procédé de frettage utilisant un tel outil |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US20150107082A1 (fr) |
| EP (1) | EP2869964A1 (fr) |
| CN (1) | CN104411451A (fr) |
| BR (1) | BR112014032869A2 (fr) |
| CA (1) | CA2877837A1 (fr) |
| FR (1) | FR2993022B1 (fr) |
| RU (1) | RU2015102971A (fr) |
| WO (1) | WO2014006304A1 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106271573A (zh) * | 2016-08-30 | 2017-01-04 | 江苏润模汽车检测装备有限公司 | 一种双工位螺钉自动化装配设备 |
| CN107890329B (zh) * | 2017-11-18 | 2020-08-21 | 钱思辰 | 一种保洁用拖把自动清洗脱水装置 |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3688381A (en) * | 1970-03-16 | 1972-09-05 | Rohr Corp | Apparatus for installing bushings |
| EP0100792A2 (fr) * | 1982-08-10 | 1984-02-22 | CARAVEL S.A.S. di Maniaci Maria Rita & C. | Dispositif hydraulique pour l'extraction ou la mise en place de bagues de roulement de bateau |
| US5549034A (en) * | 1995-10-06 | 1996-08-27 | Chrysler Corporation | Wrist pin for piston and connecting rod assembly |
| US20060059677A1 (en) * | 2004-09-17 | 2006-03-23 | Lokring Technology Corporation | Installation tool assembly |
| EP1736674A1 (fr) * | 2005-06-24 | 2006-12-27 | Snecma | Pièce méchanique et procédé de fabrication d'une telle pièce |
| FR2893683A1 (fr) * | 2005-11-23 | 2007-05-25 | Messier Dowty Sa Sa | Procede de fabrication d'une bielle en materiau composite |
| CN202200015U (zh) * | 2011-08-18 | 2012-04-25 | 中联重科股份有限公司 | 轴套装配机 |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3146635A (en) * | 1961-05-22 | 1964-09-01 | United Aircraft Corp | Rotor balancing sleeve |
| WO2007014292A2 (fr) * | 2005-07-25 | 2007-02-01 | U-Systems, Inc. | Surface de compression pour balayage de tissu par ultrasons |
| CN101362286B (zh) * | 2008-09-26 | 2010-06-09 | 广东四会实力连杆有限公司 | 一种连杆衬套压装装置以及连杆衬套压装方法 |
| CN201931251U (zh) * | 2011-01-10 | 2011-08-17 | 襄樊市长源东谷实业有限公司 | 连杆活塞销孔热压衬套装置 |
-
2012
- 2012-07-03 FR FR1256346A patent/FR2993022B1/fr active Active
-
2013
- 2013-06-27 WO PCT/FR2013/051500 patent/WO2014006304A1/fr not_active Ceased
- 2013-06-27 EP EP13744643.1A patent/EP2869964A1/fr not_active Withdrawn
- 2013-06-27 RU RU2015102971A patent/RU2015102971A/ru unknown
- 2013-06-27 BR BR112014032869A patent/BR112014032869A2/pt not_active IP Right Cessation
- 2013-06-27 CN CN201380035581.6A patent/CN104411451A/zh active Pending
- 2013-06-27 CA CA 2877837 patent/CA2877837A1/fr not_active Abandoned
-
2014
- 2014-12-29 US US14/584,462 patent/US20150107082A1/en not_active Abandoned
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3688381A (en) * | 1970-03-16 | 1972-09-05 | Rohr Corp | Apparatus for installing bushings |
| EP0100792A2 (fr) * | 1982-08-10 | 1984-02-22 | CARAVEL S.A.S. di Maniaci Maria Rita & C. | Dispositif hydraulique pour l'extraction ou la mise en place de bagues de roulement de bateau |
| US5549034A (en) * | 1995-10-06 | 1996-08-27 | Chrysler Corporation | Wrist pin for piston and connecting rod assembly |
| US20060059677A1 (en) * | 2004-09-17 | 2006-03-23 | Lokring Technology Corporation | Installation tool assembly |
| EP1736674A1 (fr) * | 2005-06-24 | 2006-12-27 | Snecma | Pièce méchanique et procédé de fabrication d'une telle pièce |
| FR2893683A1 (fr) * | 2005-11-23 | 2007-05-25 | Messier Dowty Sa Sa | Procede de fabrication d'une bielle en materiau composite |
| CN202200015U (zh) * | 2011-08-18 | 2012-04-25 | 中联重科股份有限公司 | 轴套装配机 |
Non-Patent Citations (1)
| Title |
|---|
| DATABASE WPI Week 201231, Derwent World Patents Index; AN 2012-F16138 * |
Also Published As
| Publication number | Publication date |
|---|---|
| RU2015102971A (ru) | 2016-08-27 |
| CA2877837A1 (fr) | 2014-01-09 |
| CN104411451A (zh) | 2015-03-11 |
| EP2869964A1 (fr) | 2015-05-13 |
| BR112014032869A2 (pt) | 2017-06-27 |
| FR2993022A1 (fr) | 2014-01-10 |
| US20150107082A1 (en) | 2015-04-23 |
| FR2993022B1 (fr) | 2015-02-20 |
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