EP1901883B1 - Druckluftanordnung für eine Installation, die zur Strahlreinigung von Giesskernen verwendet wird - Google Patents

Druckluftanordnung für eine Installation, die zur Strahlreinigung von Giesskernen verwendet wird Download PDF

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Publication number
EP1901883B1
EP1901883B1 EP06778806A EP06778806A EP1901883B1 EP 1901883 B1 EP1901883 B1 EP 1901883B1 EP 06778806 A EP06778806 A EP 06778806A EP 06778806 A EP06778806 A EP 06778806A EP 1901883 B1 EP1901883 B1 EP 1901883B1
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EP
European Patent Office
Prior art keywords
air
approach cylinder
bore
approach
pneumatic assembly
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Application number
EP06778806A
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English (en)
French (fr)
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EP1901883A1 (de
Inventor
Vi Pham Dinh
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.)
Les Outils Pneumatiques Globe
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Les Outils Pneumatiques Globe
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Publication of EP1901883A1 publication Critical patent/EP1901883A1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D29/00—Removing castings from moulds, not restricted to casting processes covered by a single main group; Removing cores; Handling ingots
    • B22D29/001—Removing cores
    • B22D29/005—Removing cores by vibrating or hammering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/06—Hammer pistons; Anvils ; Guide-sleeves for pistons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/20—Devices for cleaning or cooling tool or work
    • B25D17/22—Devices for cleaning or cooling tool or work using pressure fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D9/14—Control devices for the reciprocating piston
    • B25D9/16—Valve arrangements therefor
    • B25D9/20—Valve arrangements therefor involving a tubular-type slide valve
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2209/00—Details of portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D2209/005—Details of portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously having a tubular-slide valve, which is coaxial with the piston
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2216/00—Details of portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D2216/0007—Details of percussion or rotation modes
    • B25D2216/0015—Tools having a percussion-only mode
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/101—Emitting warning signals, e.g. visual or sound
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/221—Sensors

Definitions

  • Such a pneumatic assembly is known from the document FR-A-2742365 .
  • the drum is attached to a support vis-à-vis a workpiece to be de-sanded, itself attached to the support.
  • the approach cylinder is in the retracted position with the rivet knife away from the workpiece.
  • the supply of compressed air is then fed so that the approach cylinder is advanced from its retracted position to its working position.
  • the stroke of the cylinder is longer or shorter depending on the original distance between the free end of the rivet and the workpiece.
  • the striking means When the free end of the rivet comes into contact with the workpiece, the striking means enter into operation.
  • These striking means consist of a piston performing reciprocating movements in a bore of the approach cylinder, under the effect of the air pressure.
  • this pneumatic assembly has the disadvantage that it can be put into operation even in the case where, inadvertently, no rivet has been mounted on the approach cylinder. Such operation is obviously abnormal and can even be dangerous in case of ejection of the striking means.
  • the document DE 8900887 (Froelich ), which describes a pneumatic assembly for the grit removal of the foundry cores according to the preamble of claim 1.
  • the approach and striking are dissociated.
  • the document DE 89 00 887 teaches a pneumatic assembly comprising a striking device.
  • Said striking device is mounted in a piston sliding in an outer hollow cylinder, the latter constituting a jack, so that the striking device can be brought, together with the piston, in a piston approaching movement from a retracted position to a working position where the rivet is in contact with a work piece.
  • the approach movement is achieved by the arrangement of the striking device together with the piston and its cylinder.
  • This arrangement causes significant bulk and heavy operation since it is the assembly consisting of the striking device and the piston that moves to move from a retracted position to a working position.
  • This heaviness of the device according to the document DE 89 00 887 leads to favoring a vertical working position to minimize the mechanical forces, which limits its use.
  • the present invention aims to provide a pneumatic assembly for grit removal of foundry cores, comprising a striking means approach mechanism of a work piece, which makes it possible to ensure the presence of the rivet, before any approach phase of the striking means.
  • the supply pressure is not detected.
  • the compressed air whose feed pressure is detected by the detection means is a non-lubricated air.
  • blowing means are provided to create an air curtain around the approach cylinder at the location where it enters the bore of the guide and retaining flange.
  • the devices of the prior art had the disadvantage that sand from the parts being sanded had a tendency to enter the apparatus between the guide and retaining flange and the approach cylinder. This sand disrupted the operation of the tire assembly, and caused premature wear. It also caused an increase in the frequency of maintenance operations.
  • the blowing means may comprise an annular groove formed in the surface of the bore of the guide and retaining flange, separated from the free end of the bore by an annular lip arranged to allow a leakage of air between the edge of the lip and the approach cylinder, and further comprise means for supplying compressed air into said groove.
  • the compressed air whose feed pressure is detected by the pressure switch is from the same source as the blowing air.
  • the non-lubricated air inlets are thus grouped at the level of the guide and retaining flange.
  • the invention also relates to a grit removal system, comprising a pneumatic assembly as described above.
  • the grit hammer shown in the figures comprises firstly a barrel 1 provided with fastening means 2 for mounting the hammer in a grit removal facility.
  • An approach cylinder 3 is slidably mounted in a bore 4 of the barrel 1 from which it protrudes, and supports at its outer free end to the barrel a rivet 5. The end of the barrel opposite the exit of the approach cylinder is closed.
  • front of the hammer will be designated hereinafter the direction of the free end of the approach cylinder and the rivet 5, and "backward” in the opposite direction, namely that of the closed end of the barrel 1.
  • the approach cylinder 3 slides in the barrel 1 of a retracted position ( figures 6 , 9 and 16 ) at a work position ( figures 10 and 17 ) where the free end of the rivet is in abutment on a piece to be removed. It will be seen below that, if nothing limits the stroke of the approach cylinder, it comes into over-travel position ( figures 7 and 18 ).
  • the outer surface of the approach cylinder 3 bears on the surface of the bore 4 in two sealing and guiding zones.
  • a first zone is formed by a median bead 6 carrying a seal 7 at the front with the bore 4, behind which is formed an annular groove arranged to receive a guide segment 8.
  • a second zone is formed by a hammer head 9 screwed to the rear of the approach cylinder 3, and whose outer surface carries a seal 10 behind a guide segment 11.
  • a guide and retaining flange 12 is mounted on the barrel by means of screws 13.
  • the flange 12 receives in a suitable annular groove a seal 14 with the approach cylinder 3, and maintains against a shoulder of the bore 4 a resilient stop before 15.
  • the stop 15 is provided to come into contact with a shoulder 16 before the bead 6 when the approach cylinder 3 is in over-stroke position ( figure 8 ).
  • the O-rings 7, 10 and 14 delimit two chambers between the outer surface of the approach roll 3 and the surface of the bore 4, respectively a rear chamber 17 between the seals 7 and 10 and a front chamber 18 between the Seals 7 and 14.
  • Another chamber 19 is formed at the rear of the approach cylinder 3, between the seal 10 and the bottom of the barrel 1. It will be seen below that, when the chambers 17 and 19 communicate, they form a first compression chamber, while that the chamber 18 forms a second compression chamber.
  • the barrel 1 is provided at its closed end with a port 20 for the admission of compressed air, capable of connecting the chamber 19 to a source of compressed air via a connector 21.
  • the air source compressed is also capable of being connected to the chamber 18 via a connector 22 mounted on an orifice 23 formed in the wall of the barrel 1 immediately behind the elastic abutment 15.
  • the chamber 17 is capable of be vented through a fitting 24 mounted on an orifice 25 formed in the wall of the barrel 1 immediately behind the bead 6 when the approach cylinder 3 is in its retracted position and forward of the seal 10 when the approach cylinder 3 is in its over-stroke position.
  • the wall of the barrel 1 is pierced by a hole 26 which is behind the seal 7 when the approach cylinder 3 is in over-stroke position abutting the elastic abutment 15.
  • the hole 26 thus opens into the chamber 17 when the approach cylinder 3 is in this position.
  • a connector 27 is mounted on the hole 26 to connect the hole 26 to a pressure switch.
  • the bore 28 of the guide and retaining flange 12 is provided with two annular grooves in front of the mounting groove of the seal 14 ( figure 8 ).
  • the front groove forms an annular chamber 29 connected by a bore 30 in the wall of the flange 12 to a coupling 31 which can be connected to a source of high pressure air.
  • the annular chamber 29 is separated from the front face 32 of the flange 12 by an annular lip 33 forming a clearance with the outer surface of the approach cylinder 3, this clearance determining an annular orifice of blowing around the cylinder 3.
  • a wiper seal 34 is disposed in the annular chamber 29 ( figure 15 ).
  • the rear groove forms an annular chamber 35 connected by a bore 36 ( figures 6 and 15 ) in the wall of the flange 12 to a connector 37 may be connected to a source of high pressure air.
  • a bore 38 is furthermore formed in the wall of the approach cylinder 3 so as to open on the one hand into the bore 39 of the approach cylinder, and on the other hand into the annular chamber 35 when the cylinder of approach is in its retracted position.
  • the longitudinal location of the bore 39 of the approach cylinder 3 where the piercing 38 opens is normally occupied by the tail 40 of the rivet 5 when the rivet is mounted on the hammer.
  • the tail 40 of the rivet has an annular flange 41.
  • a flange mounting bracket 42 is made in two parts separated by an axial plane and held together by a retaining spring 43 engaged in a groove outer 44 of the flange 42.
  • the flange 42 is held axially on the approach cylinder 3 by means of an insert 45 also in two parts separated by an axial plane.
  • the insert 45 is partially engaged radially in two opposite annular grooves 46 and 47 respectively formed on the outer surface of the approach cylinder and on the inner surface of the flange 12.
  • the annular flange 41 is clamped between the front end face of the approach cylinder 3 and a washer forming a snap damper retained by an annular flange 49 of the flange 12.
  • a piston 50 is also slidably mounted in the bore 39 of the approach cylinder 3.
  • This piston 50 comprises a rear portion 51 of diameter corresponding to that of the bore 4 and a front portion 52 of smaller diameter.
  • the front portion 51 of the piston defines with the bore 39 of the approach cylinder 3 an annular volume 53.
  • valve 54 acting as a distributor moving in a valve box 55, associated with conduits, which will be described below, formed in the walls of the approach cylinder 3 and other organs also described below, makes it possible to make these movements to the piston under the action of the compressed air admitted through the orifice 20 and escaping through the orifice 25.
  • the valve 54 has a generally cylindrical outer casing in which two annular grooves 56 and 57 respectively are formed respectively.
  • the outer casing therefore forms three ranges: a trailing pad 58, a median pad 59 between the two grooves, and a front pad 60.
  • the valve 54 comprises a generally conical axial separation web 61, having at its apex a seat 62 substantially in the rear end plane of the valve, for a calibrated orifice which will be described hereinafter.
  • Valve box 55 is a generally cylindrical annular member whose outer surface 63 is substantially cylindrical.
  • the surface 64 of the bore of the valve box 55 comprises a set of annular milling forming grooves in circular arcs. From the rear towards the front, these milling forms the grooves 65, 66 and 67 cooperating with the grooves 56 and 57 of the valve 54. Another groove 68 cooperates with the groove 56, holes 69 passing through the wall of the box with a valve 55 opening at the bottom of the groove 68. Finally, another groove 70 is formed foremost in the surface of the bore 64.
  • the front face 71 of the valve box 55 has a cavity 72 ( figures 8 and 12 ) communicating with holes 73 which open into the grooves 65 and 66 for the return of the cylinder.
  • valve 54 is retained in the bore 64 of the valve box 55 forwards by the rear face 90 of the approach cylinder 3 and rearwardly by a valve box cover 91.
  • the cover 91 has an axial bore 92 whose front end forms a calibrated orifice 93 which has been discussed above. This orifice 93 is able to bear on the seat 62 by sliding the valve 54 in the bore 64 and thus be closed.
  • a set of peripheral holes 94 also generally pass axially through the cover 91, however, moving away from the rear towards the front.
  • the bores 94 communicate with axial bores formed in the valve box 55, these axial bores opening into the groove 70.
  • the rear part of the hammer head 9 comprises a plastic plug 100 forming a damper. Holes 101 allow the admission of the high pressure into the apparatus.
  • the wall of the hammer head 9 has holes 110 opening into grooves 111 ( figure 8 ) allowing the connection to the exhaust.
  • Bores 120 distributed circumferentially and converging forwardly through the wall of the approach cylinder 3 towards the bore 39, from the rear shoulder 121 of the bead 6 where they thus open into the chamber 17.
  • a radial bore 122 through which the function will be explained below, is also formed in the wall of the approach cylinder 3, opening into the annular space 53 when the approach cylinder 3 is in its retracted position.
  • a ring 123 engaged in a ring groove formed in the bore 39 guides the front portion 52 of the piston 50 while in this position.
  • a blind hole 124 opens into the bore 39 in the extension of the bore 122, which is plugged by a plug 125.
  • the bore 124 communicates with radial bores in the wall of the approach cylinder 3 for feeding and venting.
  • Compressed air is fed through a pipe 201 of a compressor not shown to a filter 202 and then to a pressure regulator 203. From there, a portion of the compressed air is fed through a pipe 204 to a lubricator 205, while the other part is used non-lubricated as will be described below.
  • Lubricated compressed air is fed through line 206 to a two-way electropneumatic distributor 207.
  • One channel 208 is connected to the connector 21 and the other channel 209 is connected to the connector 22 to respectively provide forward and reverse movements of the approach cylinder 3.
  • the non-lubricated compressed air is led on the one hand by a pipe 210 to a blowing valve 211 and thence to the coupling 31. It is, on the other hand, led via a pipe 212 to a valve 213 and from there to the connection 37 via a conduit 214.
  • a pressure switch 215 is connected on the pipe 214 for the presence detection of the rivet 5 on the approach cylinder 3.
  • the connector 27 is connected via a line 216 to a pressure switch 217 for the over-travel detection of the approach cylinder 3.
  • connection 24 is connected by a pipe 218 to a valve 219 and from there to a venting pipe 220.
  • the pneumatic or electropneumatic equipment that has just been described is electrically connected by lines not shown to a programmable controller 225 which controls the equipment so as to ensure the programmed operation of the grit hammer.
  • the sandblasting hammer which has just been described operates in the following manner.
  • An operating cycle starts with the retracted approach cylinder 3, by detecting the presence of the rivet 5 on the approach cylinder 3.
  • the bore 38 is in communication with the valve 213 through the annular chamber 35, the bore 36, the connector 37 and the pipe 214.
  • the valve 213 is then open. If the rivet is absent, the pressure switch 215 detects no pressure.
  • the cycle is interrupted and an alarm is generated.
  • the cycle can also be interrupted if the detected pressure is below a certain threshold, which indicates an abnormal level of leakage.
  • the bore 38 is plugged so that the pressure switch 215 detects a pressure.
  • the valve 213 is then closed and the cycle continues.
  • valve 219 is closed, which has the effect of blocking the escape of the chamber 17. This blocking has the effect of inhibiting the drive of the piston 50 until the valve 219 is subsequently opened .
  • the distributor 207 is then controlled so as to bring the lubricated compressed air to the connection 21 and thence to the chamber 19 and then to the chamber 17.
  • the approach cylinder 3 advances under the effect of the compressed air until it comes into abutment, either against a workpiece via the rivet 5, or by contacting its shoulder 16 with the abutment 15.
  • the next step is to detect if a workpiece is absent, that is to say, if the approach cylinder 3 comes into over travel abutting against the stopper 15. In this case, the seal 7 exceeds the hole 26 which has the effect of putting the pressure switch 217 in communication with the high pressure of the chamber 17 via the connector 27 and the pipe 216. When this high pressure is detected, the cycle is interrupted, the supply of compressed air is cut by the distributor 207 and an alarm is generated.
  • the blast valve 211 is opened to blow an air curtain around the approach cylinder 3, and the vent valve 219 free of the chamber 17 is opened so as to start the striking of the rivet by the piston 50.
  • the typing step is broken down into cycles of three phases illustrated respectively in Figures 22a, 22b and 22c .
  • the piston 50 is in advance phase.
  • the high pressure is exerted on the rear face 230 of the piston via the groove 70.
  • the groove 66 is exhausted through the annular groove 56 and the holes 69.
  • the valve 54 is held in position. rear position by the high pressure in the groove 70, with the calibrated orifice 93 resting on the seat 62.
  • valve 54 was brought into the advanced position by the high pressure.
  • the piston 50 hits the rivet 5 and bounces.
  • Groove 65 is under pressure and valve 54 is pressed forward.
  • the distributor interrupts the compressed air supply of the coupling 21 to supply the connection 22 via the pipe 209.
  • the striking stops and the chamber 18 is fed, which has the effect of pushing the approach cylinder 3 back while the air in the chambers 17 and 19 escapes via the connector 24 and the valve 219.
  • the cycle is complete when the approach roll 3 has returned to its retracted position and the blow valve 211 is closed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Percussive Tools And Related Accessories (AREA)

Claims (7)

  1. Pneumatische Einheit mit einer Kombination aus Annäherung und Schlag, für eine Entsandungsanlage von Gusskernen, die Folgendes enthält:
    - eine Trommel (1), die Druckluftzufuhreinrichtungen (20) und Luftabfuhreinrichtungen (25) enthält;
    - einen Anstellzylinder (3), der in der Trommel unter der Wirkung der Druckluft zwischen einer zurückgezogenen Stellung und einer Arbeitsstellung gleitend montiert ist, in der ein am freien Ende des Anstellzylinders montierter Stempel (5) mit einem Werkstück in Kontakt ist;
    - Schlageinrichtungen (50), um unter der Wirkung der Druckluft wiederholte Stöße auf das Ende des Stempels entgegengesetzt zu seinem mit dem Werkstück in Kontakt stehenden Ende auszuüben, und
    - einen Führungs- und Rückhalteflansch (12), der am freien Ende der Trommel montiert ist, um das Gleiten des Anstellzylinders zu führen,
    dadurch gekennzeichnet, dass sie Folgendes enthält:
    - eine Ringkammer (35), die im Flansch (12) geformt und durch eine Bohrung (36) mit einem Verbindungsstück (37) verbunden ist, das an eine Druckluftquelle und einen Druckregler angeschlossen werden kann, und
    - eine Bohrung (38), die in der Wand des Anstellzylinders ausgeführt ist, um einerseits in einer Bohrung (39) des Anstellzylinders und andererseits in der Ringkammer (35) zu münden, wenn der Anstellzylinder in seiner zurückgezogenen Stellung ist,
    und dass Stempel (5) ein Ende (40) enthält, das, wenn der Stempel (5) auf das freie Ende des Anstellzylinders (3) montiert ist, den Längsbereich der Bohrung (39) des Anstellzylinders ausfüllt, in den die Bohrung (38) mündet, so dass das Ende (40) des Stempels (5) die Bohrung verstopft (38),
    damit durch den Druckregler das Vorhandensein bzw. die Abwesenheit eines Druckluft-Speisedrucks und somit das Vorhandensein bzw. die Abwesenheit des Stempels erfasst wird,
    wobei die pneumatische Einheit außerdem Sperreinrichtungen (225) der Luftzufuhreinrichtungen enthält, wenn der Speisedruck nicht erfasst wird.
  2. Pneumatische Einheit nach Anspruch 1, bei der:
    - das Montageende (40) im Wesentlichen zylindrisch ist und sich in eine Bohrung einfügen kann, die am freien Ende des Anstellzylinders geformt ist;
    - das Verbindungsstück (37) mit der Druckluftquelle durch eine Rohrleitung (214) verbunden ist, um die Bohrung (38) mit Druckluft zu speisen.
  3. Pneumatische Einheit nach Anspruch 1 bis 2, bei der die Druckluft, deren Speisedruck von den Erfassungseinrichtungen erfasst wird, eine nicht geölte Luft ist.
  4. Pneumatische Einheit nach Anspruch 3, die Blaseinrichtungen (29) enthält, um einen Luftvorhang um den Anstellzylinder im Bereich der Stelle zu erzeugen, wo er in die Bohrung des Führungs- und Halteflanschs eindringt.
  5. Pneumatische Einheit nach Anspruch 4, bei der die Blaseinrichtungen eine Ringnut (29) enthalten, die in der Fläche der Bohrung (28) des Führungs- und Halteflanschs geformt ist, getrennt vom freien Ende der Bohrung durch eine Ringlippe (33), die eingerichtet ist, um ein Luftleck zwischen dem Rand der Lippe und dem Anstellzylinder zu erlauben, und außerdem Einrichtungen enthalten, um Druckluft in die Rille einzuführen.
  6. Pneumatische Einheit nach einem der Ansprüche 1 und 3, bei der die Druckluft, deren Speisedruck vom Druckregler erfasst wird, von der gleichen Quelle stammt wie die Blasluft.
  7. Entsandungsanlage, dadurch gekennzeichnet, dass sie eine pneumatische Einheit nach einem der Ansprüche 1 bis 6 enthält.
EP06778806A 2005-07-08 2006-07-06 Druckluftanordnung für eine Installation, die zur Strahlreinigung von Giesskernen verwendet wird Active EP1901883B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0507329A FR2888136B1 (fr) 2005-07-08 2005-07-08 Ensemble pneumatique pour installation de dessablage des noyaux de fonderie
PCT/FR2006/001630 WO2007006936A1 (fr) 2005-07-08 2006-07-06 Ensemble pneumatique pour installation de dessablage des noyaux de fonderie

Publications (2)

Publication Number Publication Date
EP1901883A1 EP1901883A1 (de) 2008-03-26
EP1901883B1 true EP1901883B1 (de) 2012-12-12

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EP06778806A Active EP1901883B1 (de) 2005-07-08 2006-07-06 Druckluftanordnung für eine Installation, die zur Strahlreinigung von Giesskernen verwendet wird

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Country Link
EP (1) EP1901883B1 (de)
FR (1) FR2888136B1 (de)
WO (1) WO2007006936A1 (de)

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TR201809738T4 (tr) 2014-06-09 2018-07-23 O M Ler 2000 S R L Entegre sensörlerle dökümhane dökümlerinin sökülmesine yönelik sökme vibratörü veya pnömatik çekiç.
ES2683523T3 (es) 2014-06-09 2018-09-26 O.M.Ler 2000 S.R.L. Martillo de extracción de núcleo o martillo neumático para extraer el núcleo de piezas de fundición con conectores traseros
HUE052951T2 (hu) 2014-06-09 2021-05-28 O M Ler 2000 S R L Pneumatikus kalapács alumíniumötvözet-köpenyes öntödei öntvények magjának eltávolítására
CN113953873B (zh) * 2021-11-24 2023-09-05 龙口市亨嘉智能装备有限公司 紧固件中心孔全自动加工设备

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FR2888136B1 (fr) 2007-09-14
WO2007006936A1 (fr) 2007-01-18
EP1901883A1 (de) 2008-03-26
FR2888136A1 (fr) 2007-01-12

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