WO2006074676A1 - Dispositif et procede de debourrage - Google Patents

Dispositif et procede de debourrage Download PDF

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Publication number
WO2006074676A1
WO2006074676A1 PCT/EP2004/014694 EP2004014694W WO2006074676A1 WO 2006074676 A1 WO2006074676 A1 WO 2006074676A1 EP 2004014694 W EP2004014694 W EP 2004014694W WO 2006074676 A1 WO2006074676 A1 WO 2006074676A1
Authority
WO
WIPO (PCT)
Prior art keywords
inner frame
outer frame
clamping
vibrating table
casting
Prior art date
Application number
PCT/EP2004/014694
Other languages
German (de)
English (en)
Inventor
Martin Schreiber
Michael Friemelt
Original Assignee
'f.U.K' Frölich & Klüpfel Drucklufttechnik Gmbh & Co. Kg
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 'f.U.K' Frölich & Klüpfel Drucklufttechnik Gmbh & Co. Kg filed Critical 'f.U.K' Frölich & Klüpfel Drucklufttechnik Gmbh & Co. Kg
Priority to EP04804285A priority Critical patent/EP1827738A1/fr
Priority to PCT/EP2004/014694 priority patent/WO2006074676A1/fr
Priority to DE202004021523U priority patent/DE202004021523U1/de
Publication of WO2006074676A1 publication Critical patent/WO2006074676A1/fr

Links

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

Definitions

  • the invention relates to an apparatus and method for coring at least one casting after the casting material has hardened.
  • required inner contours or cavities such as channels, are produced by inserting cores, which consist for example of a sand-binder mixture, into a casting mold. After casting, the sand cores are surrounded by casting material and must be removed after hardening of the casting material through openings provided in the casting.
  • cores consist for example of a sand-binder mixture
  • the sand cores must have a relatively high strength so that they can withstand the forces that occur during casting and especially when cooling. In order to destroy and remove the sand cores after cooling the casting material without damaging the casting, therefore, special devices and methods are necessary.
  • the casting After removal of the abrasion, the casting is also vibrated in the vibrator, that is placed in oscillations of high acceleration and low frequency, the amplitudes are chosen so that their height is greater than the distance between the inner wall of the casting and the remnants of the sand core so that the inner wall before the turning points of the amplitude meets each of the core pieces and these are further crushed.
  • the amplitude of the ever-changing size of the remnants must be adjusted and in between repeatedly brought by the introduction of vibration energy of the resulting abrasion to drain, since the abrasion has a buffer effect, which dampens the initiated Hinttel energie. Turning the casting ensures that residual pieces do not settle in vibration nodes and remain there uncrushed.
  • a device for removing inner cores from hardened castings after exposure of the casting with impact energy in a known knocking device.
  • This device has two mutually perpendicular axes for rotating the casting and consists essentially of a cuboid frame-like constructed vibrating hollow body for receiving a casting, which stores buffered in a cuboid inner frame, wherein the inner frame is rotatably mounted about an axis in a rectangular outer frame , which in turn supports an axis perpendicular to the aforementioned axis in a frame, so that the oscillating hollow body is gimbaled.
  • the frame consists essentially of a seated on the ground base frame with viewed from the side approximately triangular side cheeks, which receive a rotary shaft for supporting the outer frame.
  • the object of the invention is to provide a device for coring of castings after cooling of the casting material, which is simple in construction and with which the coring, in particular of castings having narrow openings and channels with low wall thickness, effectively and safely without damaging the casting is possible , where the necessary vibration and Trottelenergie should be transferred to the casting largely lossless.
  • Fig. 1 is a schematic perspective view from the front of a coring device according to the invention
  • FIG. 2 shows a schematic front view of the device according to FIG. 1 3 shows schematically a side view of the device according to FIG. 1
  • FIG. 4 shows schematically a top view of the device according to FIG. 1
  • FIG. 5 shows schematically a front view of a wire rope damper used in the device according to the invention according to FIG.
  • FIG. 6 shows schematically a side view of the wire rope damper according to FIG.
  • FIG. 7 is a schematic perspective view of a vibrating table of the device according to the invention according to FIG. 1
  • FIG. 8 shows schematically a front view of a vibrating device of the device according to the invention according to FIG. 1
  • FIG. 9 shows schematically a perspective view of a vibrating device of the device according to the invention according to FIG. 1
  • the inventive device 1 ⁇ essentially has a cuboid outer frame 2, a cuboid réelle31. , Swinging frame 3, a vibrating or vibrating table 4 and a vibrating device 5 and preferably a knocking device 6 (Fig. L to 4).
  • the outer frame 2 consists essentially of four parallel spaced apart
  • Swing feet 9 are provided of a damping, elastic material, preferably made of rubber, with which the outer frame 2 stands on a floor 10.
  • outer frame 2 each two upper and two lower horizontal and mutually parallel, and perpendicular to the outer frame vertical struts 7
  • the upper and lower outer frame side struts 11; 12 preferably arranged offset in relation to the outer frame vertical struts 7 in the direction of a transverse center plane 16 of the device 1 according to the invention such that they communicate with their outer walls 17; 18 abut against inner walls 19 of the outer frame vertical struts 7.
  • the rear outer frame ceiling strut 15 is expediently arranged offset in the direction of a longitudinal center plane 20 of the device 1, that is, in the direction of the front outer frame ceiling strut 14 so that it is not disposed between the outer frame vertical struts 7, but attached to the two upper outer frame side struts 11. is.
  • the rear outer frame ceiling strut 15 is fixed with its two end edges 21 on inner walls 22 of the outer frame side struts 11, so that it is arranged in a side view with the upper outer frame side struts 11 in alignment (Fig .3).
  • the cuboid inner frame 3 is analogous to the outer frame 2 essentially also four parallel spaced inner frame vertical struts 24 and two upper and two lower horizontal and mutually parallel inner frame side struts 25; 26, and two mutually parallel and both to the inner frame vertical struts 24 and to the inner frame side struts 25; 26 vertical
  • the inner frame side struts 25 In contrast to the outer frame 2, the inner frame side struts 25; Expediently, in relation to the inner frame vertical struts 24, not offset towards the transverse center plane 16 but outwardly offset from the transverse center plane 16.
  • the inner frame side struts 25; 26 arranged offset so that they with their inner sides 30; 31 abut against the outer sides 32 of the inner frame vertical struts 24 and are connected thereto.
  • the rear inner frame ceiling strut 29 is offset in the direction of the front inner frame ceiling strut 28, that is, offset to the longitudinal center plane 20 and attached to the two upper inner frame side struts 25, in particular with end faces 33 on the inner sides 30 of the inner frame side struts 25.
  • the inner frame frame 3 is suspended and buffered by means of elastic impact and vibration damping buffer body, preferably by means of known wire rope stretcher 34, mounted in the outer frame 2.
  • wire stretcher 34 consist essentially of two parallel spaced strips 34a with preferably round recesses 34b through a wire rope 34c, for example, made of steel or stainless steel, preferably made of spring steel in the manner of a spring-threaded and wound, wherein the resulting slopes of the wire rope 34c with the number and the spacing of the recesses 34b can be varied (Fig. 5 and 6). When viewed from the side, the wound wire 34c is bent elliptically (Fig. 6).
  • the inner frame 3 and the outer frame 2 are expediently dimensioned so that the inner frame 3 is completely disposed within the outer frame 2 and is received thereby, in particular such that the outer frame vertical struts 7 are aligned with the corresponding inner frame vertical struts 24 in a side view (Fig. 3), the outer frame floor struts 13 with the corresponding inner frame floor struts 27 and the outer frame ceiling struts 14; 15 with the corresponding inner frame ceiling struts 28; 29 are each arranged in a plan view aligned one above the other ( Figure 4).
  • Drahtseildämpfer 34 are symmetrically spaced from each other with respect to the longitudinal center plane 20 and the transverse center plane 16 on the inner frame 3 and the frame Fixed outer frame 2, so that all wire rope stretcher 34 are evenly loaded in the rest position.
  • the outer frame struts 7 and 10-15 and the inner frame struts 24-29 have for example a rectangular or square cross section, wherein the outer and inner frame vertical struts 7, - 24 are expediently designed as a hollow body.
  • the vibrating table 4 of the device 1 is arranged inside the inner frame 3 and has substantially a horizontal table top 40, two vertical, vertically upwardly extending, in a side view triangular side walls 41 and two adjoining the side walls 41 vertically downwardly extending side wall web 42 and two mutually parallel, laterally spaced horizontal support beams 43 provided between upper tapered end portions 44 of the two triangular side walls 41 ( Figure 7).
  • the vibrating table 4 is symmetrical both to the longitudinal center plane 20 and to the transverse center plane 16.
  • the table top 40, and the two side walls 41 and the Sowandungsstege 42 each have stiffening ribs 45, wherein the ribs 45 are preferably provided on the table top 40 on the underside of a bottom wall 46 and a surface 47 of the table top 40 is flat.
  • clamping elements 48 for receiving and clamping a front and rear end portion 81; 82 of at least one, preferably two castings 80 are provided, which are preferably positioned on the vibrating table such that a longitudinal axis 83 of Castings 80 is parallel to the transverse center plane 16 of the device 1 and the vibrating table 4.
  • these are preferably arranged laterally uniformly spaced relative to the transverse center plane 16.
  • the clamping elements 48 are, for example, clamping blocks 49, which are fastened with their bottom plates 50 to the surface 47 of the table top 40, and clamping jaws 51 with clamping screws 52 for clamping the casting 80, wherein in each case three clamping blocks 49 the front or rear end portion 81; 82 of the respective casting 80.
  • a clamping block 49 engages on the end walls 84a of the front or rear end region 81; 82 and on both side walls 84 b of the GusStücks 80, so that it is mounted horizontally immovably on the clamping elements 48.
  • clamping elements 48 are off-center with respect to the transverse center plane 16 and arranged opposite one another.
  • tensioning means 53 are provided on the two support beams. These consist for example of two horizontal clamping plates 54; 55, which are held vertically one above the other and spaced from each other by preferably four guide pins 56 are displaceable vertically to each other, wherein the upper clamping plate 54 is fixed to the support beam 43. To the guide pins are still above the upper clamping plate 54 vertical return springs 57 and between the two clamping plates 54; 55 spacer sleeves 58 arranged.
  • an inflatable bellows 59 is provided, which in the inflated state, the two clamping plates 54; 55 apart, with the upper clamping plate 54 is supported on the support beam 43 and the lower clamping plate 54 is moved against the force of the return springs 57 down so far that it touches the casting 80 on an upper surface 85 and on this the necessary pressure for clamping exercises.
  • the vibrating table 4 also has at least one, preferably two leaf springs 60, which are provided in the upper region of the vibrating table 4.
  • the leaf springs are fixed to spring holder blocks 61 which are arranged at the upper end region 44 of the side walls 41 (FIG. 7) or on the support beam 43 (not illustrated).
  • the leaf springs 60 are aligned with their spring longitudinal axis 63 parallel to the transverse center plane 16 and with its plate plane 64 horizontally and have starting from the spring holder blocks 61 in the same direction.
  • leaf springs 60 of the vibrating table 4 is attached to the inner frame part 3.
  • the leaf springs 60 are attached in particular to an underside 39 or on an upper surface 28a of the front inner frame ceiling strut 28 and at a lower side or upper side of the supporting beam (43). The exact function of the leaf springs 60 will be explained in more detail below.
  • the vibration device 5 of the device 1 has an imbalance shaft 90 with at least one, in particular with two imbalance masses 91, which in each case are arranged at the shaft end region side and are formed, for example, by a plurality of individual, unbalanced disks 92 connected to one another (FIGS. 8 and 9) ).
  • a pivot bearing 94 is also provided, wherein at least one of the bearing 94 and axial forces for supporting the imbalance shaft 90 in each case a housing 98th can record, for example, with a known hard-lot storage.
  • a further radial thrust bearing 96 for supporting the vibrating table 4 on the imbalance shaft 90 is disposed on the imbalance shaft 90 on the opposite side of the imbalance masses 91 j e with respect to the pivot bearings 94, which will be discussed in more detail below.
  • the imbalance shaft 90 in the device 1 according to the invention is arranged below the table top 40, parallel to the bottom wall 46 of the table top 40, the longitudinal axis or eccentric axis 97 of the imbalance shaft 90 being horizontal and in the longitudinal center plane 20 of the device 1 or the vibrating table 4 runs (Fig. 2).
  • the two housings 98 in which the imbalance shaft 90 is rotatably mounted with its shaft ends 93, fixedly connected to the inner frame 3 of the device 1.
  • the housings 98 are non-rotatably and non-rotatably mounted on upper sides 26b of the lower inner frame side struts 26 (FIGS. 1 and 2). Characterized the power transmission, in particular the transmission of the vibrations generated by the imbalance shaft 90 is ensured on the inner frame 3 and this excited to vibrate.
  • the transmission of the vibrations or oscillations of the imbalance shaft 90 on the vibrating table 4 is inventively achieved in that the vibrating table 4 is connected to the imbalance shaft 90 horizontally and vertically immovable, the imbalance shaft 90 is freely rotatable relative to the vibrating table 4. In particular, they point vertically.
  • the imbalance shaft 90 is driven, for example, by a motor 99 which, for example, is likewise fastened to the inner frame (not shown).
  • the device 1 preferably also has the per se known knocking device 6.
  • This consists for example essentially of a knocking hammer 100 per casting 80, which has a hollow cylinder and a plunger (not shown) and a vertical longitudinal axis 103, along which the plunger, for example, hydraulically vertically up and down is movable.
  • the knocking hammer 100 are at the offset inwards rear
  • External frame ceiling strut 15 attached so that they are, for example, each centrally above the castings 80 are arranged.
  • the knocking hammer 100 are attached to brackets 105 which are connected to an inner side 15b of the rear outer frame ceiling strut 15, and thus between the outer and inner frame ceiling struts 14; 15 and 28, respectively; 29 vertically movable.
  • the castings 80 are initially clamped between the clamping elements 48 and the clamping bellows 59 between the clamping plates 54; 55 away. Then, for example, the plungers are hydraulically so far vertically downwards in the direction of Castings 80 move until they against the lower clamping plates 55, which rest on the clamped between the clamping elements 48 castings 80, ascend. They pass through a recess 104, which is provided in the upper clamping plates 54. ,
  • the vibration and vibration energy generated by the shaft is transmitted directly to the inner frame almost directly through the bearing of the imbalance shaft in the inner frame and also directly to the imbalance shaft by the bearing of the vibrating table Vibrating and transferred over this on the firmly clamped castings.
  • the forces acting on the clamped on the vibrating table Cast horizontal and vertical vibrations and accelerations offset from one another in time in the inventive method and the amplitudes of the vertical vibration and accelerations are also 'significantly greater than the amplitudes of the horizontal oscillations and accelerations at the same frequency.
  • the casting is centered with its center of gravity spaced from the eccentric axis of the imbalance shaft such that the ratio of the amplitude of the vertical vibration to the amplitude of the horizontal vibration and the ratio of the amplitude of the vertical acceleration to the amplitude of the horizontal acceleration are in the range of 3: 1 to 1, 1: 1, preferably in the range of 2: 1 to 1, 3: 1.
  • the temporal offset of the vertical and horizontal oscillations and accelerations is preferably 0, 01 to 0, 02 s, preferably 0, 014 to 0, 016 s.
  • the device according to the invention for example, with suitable drive means about a horizontal axis which is perpendicular to the axis of the imbalance shaft, rotatably mounted (not shown).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vibration Prevention Devices (AREA)

Abstract

L'invention concerne un dispositif (1) servant à débourrer des pièces coulées. Le dispositif selon l'invention comprend un bâti extérieur parallélépipédique (2), un bâti intérieur parallélépipédique (3) logé de manière suspendue et amortie sur le bâti extérieur (2), ainsi qu'une table vibrante (4) placée à l'intérieur du bâti intérieur et recevant les pièces coulées. Cette table vibrante comprend un plateau de table horizontal dans sa zone inférieure et deux parois latérales (41) s'étendant verticalement vers le haut et est fixée sur un dispositif vibrant sans déplacement horizontal et vertical possible. Dans sa partie supérieure, la table vibrante est reliée au bâti intérieur (3) par des moyens autorisant pratiquement uniquement des mouvements verticaux de la table vibrante (4) dans la zone supérieure par rapport au bâti intérieur, le dispositif vibrant (5) placé en dessous de la table vibrante étant logé sur le bâti intérieur (3) sans déplacement horizontal et vertical possible.
PCT/EP2004/014694 2004-12-23 2004-12-23 Dispositif et procede de debourrage WO2006074676A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP04804285A EP1827738A1 (fr) 2004-12-23 2004-12-23 Dispositif et procede de debourrage
PCT/EP2004/014694 WO2006074676A1 (fr) 2004-12-23 2004-12-23 Dispositif et procede de debourrage
DE202004021523U DE202004021523U1 (de) 2004-12-23 2004-12-23 Entkernungsvorrichtung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2004/014694 WO2006074676A1 (fr) 2004-12-23 2004-12-23 Dispositif et procede de debourrage

Publications (1)

Publication Number Publication Date
WO2006074676A1 true WO2006074676A1 (fr) 2006-07-20

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PCT/EP2004/014694 WO2006074676A1 (fr) 2004-12-23 2004-12-23 Dispositif et procede de debourrage

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EP (1) EP1827738A1 (fr)
WO (1) WO2006074676A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1997573A1 (fr) * 2006-03-23 2008-12-03 Shigayamashita Co., Ltd. Dispositif a decocher le sable par vibration
FR2954195A1 (fr) * 2009-12-23 2011-06-24 Fonderie Du Poitou Aluminium Procede de decrochage par martelage utilisant un accelerometre

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3728687A1 (de) * 1987-08-27 1989-03-09 Froelich & Kluepfel Druckluft Verfahren und vorrichtung zum entkernen von gussstuecken
DE3802384A1 (de) * 1987-08-27 1989-08-10 Froelich & Kluepfel Druckluft Vorrichtung zum entkernen von gussstuecken
US6644382B1 (en) * 1997-12-13 2003-11-11 Yoshitaka Aoyama Casting sand shake-out method and its apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3728687A1 (de) * 1987-08-27 1989-03-09 Froelich & Kluepfel Druckluft Verfahren und vorrichtung zum entkernen von gussstuecken
DE3802384A1 (de) * 1987-08-27 1989-08-10 Froelich & Kluepfel Druckluft Vorrichtung zum entkernen von gussstuecken
US6644382B1 (en) * 1997-12-13 2003-11-11 Yoshitaka Aoyama Casting sand shake-out method and its apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1997573A1 (fr) * 2006-03-23 2008-12-03 Shigayamashita Co., Ltd. Dispositif a decocher le sable par vibration
EP1997573A4 (fr) * 2006-03-23 2010-12-29 Shigayamashita Co Ltd Dispositif a decocher le sable par vibration
FR2954195A1 (fr) * 2009-12-23 2011-06-24 Fonderie Du Poitou Aluminium Procede de decrochage par martelage utilisant un accelerometre

Also Published As

Publication number Publication date
EP1827738A1 (fr) 2007-09-05

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