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EP0493999B1 - Apparatus for removing sand from castings - Google Patents

Apparatus for removing sand from castings Download PDF

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Publication number
EP0493999B1
EP0493999B1 EP19910403416 EP91403416A EP0493999B1 EP 0493999 B1 EP0493999 B1 EP 0493999B1 EP 19910403416 EP19910403416 EP 19910403416 EP 91403416 A EP91403416 A EP 91403416A EP 0493999 B1 EP0493999 B1 EP 0493999B1
Authority
EP
European Patent Office
Prior art keywords
mobile
sand
casting
jack
removing sand
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.)
Expired - Lifetime
Application number
EP19910403416
Other languages
German (de)
French (fr)
Other versions
EP0493999A1 (en
Inventor
René HOUEE
Patrick Largeteau
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.)
Automobiles Peugeot SA
Automobiles Citroen SA
Original Assignee
Automobiles Peugeot SA
Automobiles Citroen SA
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 Automobiles Peugeot SA, Automobiles Citroen SA filed Critical Automobiles Peugeot SA
Publication of EP0493999A1 publication Critical patent/EP0493999A1/en
Application granted granted Critical
Publication of EP0493999B1 publication Critical patent/EP0493999B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • the subject of the invention is a sanding machine which can be used to remove the sand cores from foundry parts such as the aluminum cylinder heads of motor vehicle engines.
  • the object of the invention is to eliminate these drawbacks by proposing a sanding machine which makes it possible to receive the part in the desired direction and which instantly adapts to different dimensions of parts.
  • the sanding machine according to the invention is characterized in that the support comprises two plates between which the part to be sanded can be received with Ieu, one of these plates being fixed relative to the mobile frame and the other mobile between a remote position in which it is distant from the part and an advanced position in which it is in contact with this part.
  • the machine comprises a frame 1 fixed to the ground and a movable frame 2 which is mounted on the frame 1 with the interposition, at the top, of two pneumatic cylinders 3 a and, at the bottom, four pneumatic cylinders 3 b .
  • the frame 1 carries two elastic stops 4 which limit the longitudinal movements of the movable frame 2 and four elastic stops 5 which limit its transverse movements; it also carries two stops 6 limiting the vertical stroke of the mobile frame 2.
  • the latter which is reinforced by a vertical stiffener 7 and a series of horizontal stiffeners 8, supports two unbalance motors 9.
  • a plate 10 secured to a bottom 11 on which the part 12 to be desanded can rest and which has a rim 11 has sufficient height to hold the part.
  • a second plate 13 fixed on a movable head 14.
  • This head is integral with guide columns 15 which pass through hydraulically controlled blockers 16 carried by the frame 2. These columns are connected one to the other. the other by a cross member 17 which is connected to the frame 2 by a hydraulic cylinder 18.
  • the plates 10 and 13 are substantially vertical and each have a bottom (10a, 13a) on which the part can rest and which is surrounded by a flange ((10b-13b) of sufficient length to hold the part when the plate 13 is moved back a distance corresponding to the desired clearance J.
  • the frame 1 carries a jack 19 which communicates with the jack 18 and whose piston rod 20 is located opposite an adjustable stop 21.
  • the part to be sanded 12 is introduced into the movable frame 2, either manually or automatically using a suitable handling means, so that it rests on the bottom 11 and is in contact with the plate 10. Then the cylinder 18 is supplied so that the plate 13 advances towards the part and comes into contact with the latter after having completed the stroke C. The pressure in the cylinder is then cut, its feed distributor being brought into neutral position.
  • the piston rod 20 is advanced until it is in contact with the stop 21. Due to the communication between the jacks 18 and 19, the advance of the rod 20 causes a recoil cylinder 18 of a distance J corresponding to the desired clearance to obtain a good sanding result.
  • the movable head 14 is then locked in position by the blockers 16 which immobilize the columns 15.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Devices For Molds (AREA)
  • Machine Tool Units (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Description

L'invention a pour objet une machine à dessabler utilisable pour éliminer les noyaux de sable des pièces de fonderie telles que les culasses en aluminium des moteurs de véhicules automobiles.The subject of the invention is a sanding machine which can be used to remove the sand cores from foundry parts such as the aluminum cylinder heads of motor vehicle engines.

Il est connu, afin d'assurer un dessablage efficace, de soumettre la pièce simultanément à des vibrations et à des chocs. Il existe des machines dans lesquelles la pièce à dessabler est reçue dans un support prévu sur un bâti mobile lui-même monté sur un bâti fixe. Le support comprend un fond incliné sur lequel repose la pièce et des parois latérales servant à limiter le mouvement de la pièce et à créer des chocs lorsque le bâti mobile est mis en vibration.(EP-A- 0 144 031)
Les dimensions du support font que la pièce ne peut être reçue que dans un sens donné et il en résulte, pour certaines pièces, que les chocs s'exercent sur des faces terminées, risquant de détériorer ces dernières. De plus, afin de s'adapter à des pièces de dimensions différentes, il est nécessaire de mettre des cales contre les parois, ce qui occasionne une perte de temps.It is known, in order to ensure effective sanding, to subject the part simultaneously to vibrations and shocks. There are machines in which the part to be sanded is received in a support provided on a movable frame itself mounted on a fixed frame. The support includes an inclined bottom on which the part rests and side walls used to limit the movement of the part and to create shocks when the mobile frame is vibrated. (EP-A- 0 144 031)
The dimensions of the support mean that the part can only be received in a given direction and it results, for certain parts, that the shocks are exerted on completed faces, risking damaging the latter. In addition, in order to adapt to parts of different dimensions, it is necessary to put shims against the walls, which causes a loss of time.

L'invention a pour but d'éliminer ces inconvénients en proposant une machine à dessabler qui permet de recevoir la pièce dans le sens souhaité et qui s'adapte instantanément à différentes dimensions de pièces.The object of the invention is to eliminate these drawbacks by proposing a sanding machine which makes it possible to receive the part in the desired direction and which instantly adapts to different dimensions of parts.

La machine à dessabler selon l'invention est caractérisée en ce que le support comprend deux plaques entre lesquelles la pièce à dessabler peut être reçue avec j'eu, l'une de ces plaques étant fixe par rapport au bâti mobile et l'autre mobile entre une position reculée dans laquelle elle est éloignée de la pièce et une position avancée dans laquelle elle est en contact avec cette pièce.The sanding machine according to the invention is characterized in that the support comprises two plates between which the part to be sanded can be received with Ieu, one of these plates being fixed relative to the mobile frame and the other mobile between a remote position in which it is distant from the part and an advanced position in which it is in contact with this part.

On a décrit ci-après, à titre d'exemple non limitatif, un mode de réalisation de la machine selon l'invention, avec référence aux dessins annexés dans lesquels :

  • La Figure 1 est une vue en élévation de la machine,
  • La Figure 2 en est une vue de dessus, La Figure 3 en est une vue selon la flèche F de la Figure 1.
An embodiment of the machine according to the invention has been described below, by way of nonlimiting example, with reference to the appended drawings in which:
  • Figure 1 is an elevational view of the machine,
  • Figure 2 is a top view, Figure 3 is a view along arrow F in Figure 1.

Telle qu'elle est représentée au dessin, la machine selon l'invention comprend un bâti 1 fixé au sol et un bâti mobile 2 qui est monté sur le bâti 1 avec interposition, à la partie supérieure, de deux vérins pneumatiques 3a et, à la partie inférieure, de quatre vérins pneumatiques 3b. Le bâti 1 porte deux butées élastiques 4 qui limitent les mouvements longitudinaux du bâti mobile 2 et quatre butées élastiques 5 qui limitent ses mouvements transversaux ; il porte également deux butées 6 limitant la course verticale du bâti mobile 2. Ce dernier, qui est renforcé par un raidisseur vertical 7 et une série de raidisseurs horizontaux 8, supporte deux moteurs à balourd 9.As shown in the drawing, the machine according to the invention comprises a frame 1 fixed to the ground and a movable frame 2 which is mounted on the frame 1 with the interposition, at the top, of two pneumatic cylinders 3 a and, at the bottom, four pneumatic cylinders 3 b . The frame 1 carries two elastic stops 4 which limit the longitudinal movements of the movable frame 2 and four elastic stops 5 which limit its transverse movements; it also carries two stops 6 limiting the vertical stroke of the mobile frame 2. The latter, which is reinforced by a vertical stiffener 7 and a series of horizontal stiffeners 8, supports two unbalance motors 9.

Sur le bâti mobile 2 est fixée une plaque 10 solidaire d'un fond 11 sur lequel peut reposer la pièce 12 à dessabler et qui présente un rebord 11a de hauteur suffisante pour maintenir la pièce.On the movable frame 2 is fixed a plate 10 secured to a bottom 11 on which the part 12 to be desanded can rest and which has a rim 11 has sufficient height to hold the part.

En regard de la plaque 10 est disposée une deuxième plaque 13 fixée sur une tête mobile 14. Cette tête est solidaire de colonnes de guidage 15 qui traversent des bloqueurs 16 à commande hydraulique portés par le bâti 2. Ces colonnes sont reliées l'une à l'autre par une traverse 17 qui est reliée au bâti 2 par un vérin hydraulique 18.
Les plaques 10 et 13 sont sensiblement verticales et présentent chacune un fond (10a,13a) sur lequel la pièce peut reposer et qui est entouré d'un rebord ((10b-13b) de longueur suffisante pour maintenir la pièce lorsque la plaque 13 est reculée d'une distance correspondant au jeu J désiré.Next to the plate 10 is disposed a second plate 13 fixed on a movable head 14. This head is integral with guide columns 15 which pass through hydraulically controlled blockers 16 carried by the frame 2. These columns are connected one to the other. the other by a cross member 17 which is connected to the frame 2 by a hydraulic cylinder 18.
The plates 10 and 13 are substantially vertical and each have a bottom (10a, 13a) on which the part can rest and which is surrounded by a flange ((10b-13b) of sufficient length to hold the part when the plate 13 is moved back a distance corresponding to the desired clearance J.

Le bâti 1 porte un vérin 19 qui communique avec le vérin 18 et dont la tige de piston 20 se trouve en regard d'une butée réglable 21.The frame 1 carries a jack 19 which communicates with the jack 18 and whose piston rod 20 is located opposite an adjustable stop 21.

Lors de l'utilisation de la machine, on introduit la pièce à dessabler 12 dans le bâti mobile 2, soit manuellement, soit automatiquement à l'aide d'un moyen de manutention adapté, de façon qu'elle repose sur le fond 11 et se trouve au contact de la plaque 10. Puis le vérin 18 est alimenté de façon que la plaque 13 avance vers la pièce et vienne au contact de celle-ci après avoir effectué la course C. La pression dans le vérin est alors coupée, son distributeur d'alimentation étant amené en position neutre.When using the machine, the part to be sanded 12 is introduced into the movable frame 2, either manually or automatically using a suitable handling means, so that it rests on the bottom 11 and is in contact with the plate 10. Then the cylinder 18 is supplied so that the plate 13 advances towards the part and comes into contact with the latter after having completed the stroke C. The pressure in the cylinder is then cut, its feed distributor being brought into neutral position.

Dans une deuxième étape, on fait avancer la tige de piston 20 jusqu'à ce qu'elle soit au contact de la butée 21. Du fait de la communication entre les vérins 18 et 19, l'avance de la tige 20 entraîne un recul du vérin 18 d'une distance J correspondant au jeu désiré pour obtenir un bon résultat de dessablage. La tête mobile 14 est alors bloquée en position par les bloqueurs 16 qui immobilisent les colonnes 15.In a second step, the piston rod 20 is advanced until it is in contact with the stop 21. Due to the communication between the jacks 18 and 19, the advance of the rod 20 causes a recoil cylinder 18 of a distance J corresponding to the desired clearance to obtain a good sanding result. The movable head 14 is then locked in position by the blockers 16 which immobilize the columns 15.

Il ne reste plus qu'à mettre en marche les moteurs à balourd 9; le bâti 2 se met à osciller en entraînant la pièce 12 dans son mouvement. Cette pièce, ayant un jeu J entre les plaques 10 et 13, se déplace latéralement et vient heurter alternativement ces plaques. Les chocs ont pour effet de fractionner les noyaux à l'intérieur de la pièce. L'importance des chocs peut être réglée en déplaçant la butée 21, ce qui permet d'adapter le fonctionnement à la qualité des noyaux.It only remains to start the unbalance motors 9; the frame 2 starts to oscillate, driving the part 12 in its movement. This part, having a clearance J between the plates 10 and 13, moves laterally and alternately collides with these plates. The impact has the effect of splitting the cores inside the part. The magnitude of the shocks can be adjusted by moving the stopper 21, this which allows you to adapt the operation to the quality of the cores.

Le dessablage étant terminé, on arrête les moteurs 9, on recule la tige de piston 20, on libère la tête mobile 14 en agissant sur les bloqueurs 16, on recule la tête mobile 14 à l'aide du vérin 18 et on extrait la pièce 12 de la machine.The sanding being finished, the motors 9 are stopped, the piston rod 20 is moved back, the moving head 14 is released by acting on the blockers 16, the moving head 14 is moved back using the jack 18 and the part is extracted 12 of the machine.

Le fait qu'on amène la plaque 13 au contact de la pièce 12 et qu'on la recule du jeu nécessaire permet de s'affranchir des variations dimensionnelles de la pièce ; celle-ci peut être placée dans l'orientation la plus favorable au dessablage.The fact that the plate 13 is brought into contact with the part 12 and that it is removed from the necessary clearance makes it possible to overcome the dimensional variations of the part; this can be placed in the orientation most favorable to sand removal.

Claims (10)

  1. Apparatus for removing sand from castings and including :
    - a fixed frame (1),
    - a mobile frame (2) mounted on the fixed frame (1) so as to be able to vibrate,
    - a support for the casting (12) from which sand is to be removed and mounted on a mobile frame (2), and
    - means (9) for vibrating the mobile frame ; wherein the support comprises two plates (10 and 13) between which the casting (12) from which sand is to be removed can be received with clearance (3), one of these plates being fixed with respect to the mobile frame and the other mobile between a pushed-back position in which it is distanced from the casting and an advanced position in which it is in contact with said casting.
  2. Apparatus for removing sand from castings according to claim 1,
    wherein the mobile plate (13) is able to be brought to a position so that the casting from which sand is to be removed is kept without clearance between the two plates, its displacement means comprising means to push it backwards from this position by a distance corresponding to the desired clearance.
  3. Apparatus for removing sand from castings according to claim 1 or 2,
    wherein the means for moving the mobile plate (13) comprise a jack (18) whose rod (or body) is integral with this plate and the body (or rod) is integral with the mobile frame (2).
  4. Apparatus for removing sand from castings according to claim 2 and 3,
    wherein the means to push back the mobile plate (13) comprise :
    - a second jack (19) communicating with the jack (18), a given displacement of the rod (20) of this second jack corresponding to the sending of a specific quantity of liquid in the first jack, and
    - means to control the displacement of the second jack.
  5. Apparatus for removing sand from castings according to claim 4,
    wherein the means for controlling the movement of the rod (20) of the second jack (19) comprise a position-adjustable stop (21) against which one end of said rod is able to come to rest.
  6. Apparatus for removing sand from castings according to any one of the above-mentioned claims,
    wherein the means for moving the mobile plate (10) comprise means for guiding the latter.
  7. Apparatus for removing sand from castings according to claim 6,
    wherein the means for guiding the mobile plate (10) comprise at least one column (15) integral with the latter and sliding in a passage with corresponding dimensions and provided in a fixed element (16) with respect to the mobile frame (2).
  8. Appartus for removing sand from castings according to claim 7,
    wherein the guiding means include means (16) for blocking said column in a given position.
  9. Apparatus for removing sand from castings according to claim 2 and any one of claims 3 to 8,
    wherein at least one of the two plates (10 and 13) comprises a bottom (10a,13a) on which the casting (12) can rest and which is surrounded by an edge (10b,13b) long enough so as to maintain the casting when the mobile plate is pushed back by the distance corresponding to the desired play J.
  10. Apparatus for removing sand from castings according to any one of the above-mentioned claims,
    wherein with the two plates (10 and 13) being approximately vertical, the apparatus comprises a stop (11, 11a) secured to a fixed plate (10) and placed under the casting from which sand is to be removed so as to maintain the latter at the time it is placed.
EP19910403416 1990-12-19 1991-12-17 Apparatus for removing sand from castings Expired - Lifetime EP0493999B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9016556 1990-12-19
FR9016556A FR2670696B1 (en) 1990-12-19 1990-12-19 DESSABLING MACHINE.

Publications (2)

Publication Number Publication Date
EP0493999A1 EP0493999A1 (en) 1992-07-08
EP0493999B1 true EP0493999B1 (en) 1994-09-28

Family

ID=9403892

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910403416 Expired - Lifetime EP0493999B1 (en) 1990-12-19 1991-12-17 Apparatus for removing sand from castings

Country Status (3)

Country Link
EP (1) EP0493999B1 (en)
DE (1) DE69104339T2 (en)
FR (1) FR2670696B1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2730436B1 (en) * 1995-02-13 1997-05-09 Peugeot METHOD AND DEVICE FOR DESSABLING A FOUNDRY PIECE
ITTO20011180A1 (en) * 2001-12-18 2003-06-18 Global Foundry Systems Srl DEVICE TO REMOVE SOULS FROM CASTING JETS.
FR2901161B1 (en) * 2006-05-17 2009-03-06 Disa Serf DEVICE FOR DISENGAGING PARTS OF FOUNDRIES COMPRISING A RECEPTION AREA FOR PARTS DEFINED IN THE FORM OF A CLOSED SPACE.
CN103394675B (en) * 2013-07-25 2015-07-15 浙江省机电设计研究院有限公司 Device and method for separating iron shapes from castings in shells of wheel reducers
US9272329B2 (en) 2014-04-04 2016-03-01 Honda Motor Co., Ltd. Sand knock-out head clamping assembly
CN104801696B (en) * 2015-05-19 2017-03-29 龙岩丽荣电子科技有限公司 A kind of axle housing cast cleaning machine
CN108941479A (en) * 2018-08-09 2018-12-07 宁国市挚友合金钢材料有限公司 It is a kind of for planar carrying out the human assistance device of sand removal processing

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH654230A5 (en) * 1981-05-27 1986-02-14 Werner Lueber DEVICE FOR REMOVING THE CORE SAND FROM CAST PIECES.
JPS58148073A (en) * 1982-02-25 1983-09-03 Toyota Motor Corp Sand removal device and sand removal method for cast products
DE3236709A1 (en) * 1982-10-04 1984-04-05 R.S. Rösler Gleitschlifftechnik und technische Keramik GmbH, 8623 Staffelstein Apparatus for decoring castings
DE3341894C1 (en) * 1983-11-19 1985-03-14 Bayerische Motoren Werke AG, 8000 München Device for coring castings by vibrations
JPS63235063A (en) * 1987-03-24 1988-09-30 Hitachi Metals Ltd Apparatus for removing core sand of casting
DE8900887U1 (en) * 1988-01-27 1989-05-03 "F. u. K." Frölich & Klüpfel Drucklufttechnik GmbH & Co KG, 5600 Wuppertal Device for core removal from castings

Also Published As

Publication number Publication date
EP0493999A1 (en) 1992-07-08
FR2670696B1 (en) 1993-07-02
DE69104339T2 (en) 1995-04-20
DE69104339D1 (en) 1994-11-03
FR2670696A1 (en) 1992-06-26

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