EP0012711B1

EP0012711B1 - Centering and drilling device with retractable bushing for a drill

Info

Publication number: EP0012711B1
Application number: EP79810100A
Authority: EP
Inventors: Willy Fluckiger
Original assignee: Individual
Current assignee: Individual
Priority date: 1978-12-04
Filing date: 1979-09-20
Publication date: 1982-05-26
Also published as: EP0012711A1; DE2962961D1; ATE1087T1; CH631368A5

Abstract

1. Centering and drilling jig, (event device) being composed of a retractable drill bushing (8) which can be placed under the drill of a drilling machine, a drill to which the drill bushing (8) can serve as a guide, this drill being lowered through the drill bushing to carry out the centering of a work piece to be drilled, characterized concerning the automatic manner to position and retract the drill bushing (8) by means of a pneumatic cylinder (4, 5) which supports the drill bushing and which is controlled by a control device (15, 16) which can be actuated by the feeding lever of a drilling machine.

Description

La présente invention a pour objet un dispositif de centrage et perçage avec canon rétractable pour perceuse.The present invention relates to a centering and drilling device with retractable barrel for drill.

Il est connu d'adjoindre à une perceuse un dispositif de centrage et perçage avec canon rétractable;It is known to add a centering and drilling device with a retractable barrel to a drill;

Le document US-A-2 817 253 décrit un tel dispositif fixé sur la colonne de la perceuse et dont le canon peut être disposé sous la mèche de perçage pour le pointage et retiré, manuellement, par rotation autour d'un axe vertical pour permettre le perçage. L'ensemble du dispositif peut être adjusté en hauteur sur la colonne de la perceuse.Document US-A-2 817 253 describes such a device fixed to the column of the drill and the barrel of which can be placed under the drill bit for pointing and removed, manually, by rotation about a vertical axis to allow drilling. The entire device can be adjusted in height on the drill column.

Le document US-A-1 674867 décrit une autre variante d'un tel dispositif dont le canon est manoeuvré manuellement autour d'un axe horizontal.Document US-A-1 674867 describes another variant of such a device, the barrel of which is manually operated around a horizontal axis.

Le document US-A-2 561 819 présente un canon qui permet de bloquer la pièce à percer par rotation du canon autour d'un axe horizontal, cette rotation étant assurée un vérin pneumatique et le canon restant en place pendant le perçage.Document US-A-2,561,819 presents a barrel which makes it possible to block the part to be drilled by rotating the barrel about a horizontal axis, this rotation being ensured by a pneumatic cylinder and the barrel remaining in place during drilling.

L'avantage du dispositif objet de l'invention sur les dispositifs antérieurs consiste en ce qu'il permet de réaliser d'une façon automatique d'une part le positionnement du canon sous la mèche de perçage pour le pointage et d'autre part le retrait du canon pour permettre le perçage.The advantage of the device which is the subject of the invention over the prior devices consists in that it makes it possible, on the one hand, to carry out the positioning of the barrel under the drill bit for pointing and on the other hand withdrawal of the barrel to allow drilling.

Ce dispositif se caractérise par le fait que la mise en place et le retrait du canon s'effectue d'une façon automatique par l'intermédiaire d'un vérin supportant le canon et commandé par un dispositif de commande lui-même actionné par le levier de perçage de la perceuse.This device is characterized by the fact that the positioning and removal of the barrel is carried out automatically by means of a jack supporting the barrel and controlled by a control device itself actuated by the lever. drilling hole.

Le dessin annexé montre à titre d'exemple, une forme d'exécution du dispositif et l'adaptation à une perceuse selon l'invention.

La figure 1 est une vue de l'adaptation du dispositif sur une colonne de perceuse.
La figure 2 est une vue de face du dispositif.
La figure 3 est une vue de la fixation de l'interrupteur de la commande du piston.

The accompanying drawing shows by way of example, an embodiment of the device and the adaptation to a drill according to the invention.

Figure 1 is a view of the adaptation of the device on a drill column.
Figure 2 is a front view of the device.
Figure 3 is a view of the attachment of the piston control switch.

Le collier 1, en deux parties, est fixé à la collone de la perceuse par les quatre vis de fixation 13.The collar 1, in two parts, is fixed to the collar of the drill by the four fixing screws 13.

Une des deux parties est pourvue d'une semelle 2 dans laquelle est fraisée une entré de "T" sur toute sa longueur. Une glissière 3 est fixée par les deux vis 12 sur la semelle 2, permettant le réglage de hauteur suivant la longueur des mèches. La glissière 3 est surmontée d'un cylindre 4. L'axe du piston 5 a son extrémité filetée sur laquelle est vissé un plot 9 pour le réglage du centrage. La languette 7 est fixée au plot 9 par les deux vis 17. A l'extrémité de la languette est logé le canon de percage 8. Le plot 9 est guidé par une barre 6 qui glisse dans un coussinet 10, ce qui l'empêche de tourner. L'entrée d'air dans le cylindre 4 se fait par les orifices 11. Le piston est guidé dans le cylindre par guide-billes 18 aux deux extrémités, ce qui donne un déplacement rigide et précis. En faisant monter la broche de la perceuse par le levier de perçage, la bague 14 qui est fixée à la broche vient buter un poussoir 15. Ce poussoir 15 transmet une pression à un interrupteur 16, qui envoie un courant électrique à une électrovanne, celle-ci envoie de l'air comprimé dans le cylindre 4 qui fait evancer le piston et le canon 8 pour le centrage. Une fois la pièce centrée, la broche est montée par le levier de perçage. La bague 14, qui est fixée à la broche, bute de nouveau le poussoir 1 5. A cette deuxième pression, l'interrupteur 16 est de nouveau ouvert. L'électrovanne envoie de l'air comprimé à l'opposé du cylindre 4 et fait reculer le piston ainsi que le canon 8, la mèche est libre et le perçage peut s'effectuer librement sans canon.One of the two parts is provided with a sole 2 in which an entry of "T" is milled over its entire length. A slide 3 is fixed by the two screws 12 on the sole 2, allowing the height to be adjusted according to the length of the wicks. The slide 3 is surmounted by a cylinder 4. The axis of the piston 5 has its threaded end on which is screwed a stud 9 for adjusting the centering. The tongue 7 is fixed to the stud 9 by the two screws 17. At the end of the tongue is housed the drilling barrel 8. The stud 9 is guided by a bar 6 which slides in a bearing 10, which prevents it to turn. The air enters the cylinder 4 through the orifices 11. The piston is guided in the cylinder by ball guide 18 at the two ends, which gives a rigid and precise movement. By raising the spindle of the drill by the drilling lever, the ring 14 which is fixed to the spindle abuts a pusher 15. This pusher 15 transmits a pressure to a switch 16, which sends an electric current to a solenoid valve, that -this sends compressed air into the cylinder 4 which causes the piston and the barrel 8 to advance. Once the workpiece is centered, the spindle is mounted by the drilling lever. The ring 14, which is fixed to the spindle, again stops the pusher 1 5. At this second pressure, the switch 16 is again open. The solenoid valve sends compressed air opposite the cylinder 4 and causes the piston as well as the barrel 8 to move back, the drill bit is free and drilling can be carried out freely without the barrel.

Claims

2. Centering and drilling jig as per claim 1, characterized whilst it comprises a fixing ring (14) at the spindle of the drilling machine, a control push-rod (1 5) for a switch (16) which is linked to a solenoid valve for compressed air, which for its part is linked through port (11) to a pneumatic cylinder (4), a piston rod connected to the piston of the pneumatic cylinder (4) which supports the drill bushing (8), the successive movements of the spindle causing, during utilization, a shifting of the drill bushing (8) between its front and rear position.

3. Centering and drilling jig as per claims 1 and 2, comprising an end block (9) for the adjustment of the drill bushing, a holding plate. (7) screwed to the end block (9) by means of two screws (17) which pass through the whole length of the end block (9) and which are therefore accessible from above for loosening and tightening, and a guiding rod (6) parallel to the end block which slides in a guide (10).

4. Centering and drilling jig as per one of the claims 1 to 3, comprising a fixing bracket (1) for the fixture of the jig to the pillar of a drilling machine, this fixing bracket (1) being in two pieces, one of these pieces being fitted with a slide plate (2) in which a T-slot is milled in the whole length, the other piece of the bracket having a recessed groove to accept the rack of the drilling machine, both parts of the fixing bracket being screwed together with four screws (13).

5. Centering and drilling jig as per claim 4, comprising a sledge (3) adjustable for the height according to the length of the drill and fitted to the slide plate (2) by means of two screws (12) held in the T-slot, and on which is fitted a pneumatic cylinder (4) with two ball-guides at both ends of the cylinder (4) for the piston rod (5).