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WO1989001844A1 - Fourreau de perçage a inserer dans une broche porte-fraise - Google Patents

Fourreau de perçage a inserer dans une broche porte-fraise Download PDF

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Publication number
WO1989001844A1
WO1989001844A1 PCT/EP1988/000751 EP8800751W WO8901844A1 WO 1989001844 A1 WO1989001844 A1 WO 1989001844A1 EP 8800751 W EP8800751 W EP 8800751W WO 8901844 A1 WO8901844 A1 WO 8901844A1
Authority
WO
WIPO (PCT)
Prior art keywords
spindle
feed
drilling
housing
rotation
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
Application number
PCT/EP1988/000751
Other languages
German (de)
English (en)
Inventor
Franz Lechner
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO1989001844A1 publication Critical patent/WO1989001844A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B43/00—Boring or drilling devices able to be attached to a machine tool, whether or not replacing an operative portion of the machine tool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
    • B23Q5/02—Driving main working members
    • B23Q5/04—Driving main working members rotary shafts, e.g. working-spindles
    • B23Q5/043—Accessories for spindle drives

Definitions

  • the invention relates to a drilling quill for insertion into milling spindles according to the preamble of claim 1.
  • Such a drilling quill is known from DE-G 76 18 268 in the form that the feed transmission member as a rack running on one side along the drilling spindle with which a pinion meshes on the physical axis of rotation of the feed drive member.
  • This solution suffers from the fact that the force to be exerted on the drilling spindle acts eccentrically and, due to the meshing of the teeth, partly also sideways, which leads to deformations and distortions or at least to one-sided bearing wear and thereby inaccuracies, and further that the rack protruding outwards from the housing is susceptible to the absorption of dirt and chips.
  • the object of the invention is to remedy this, i.e. to design a drilling sleeve according to the generic term so that the feed force acts axially and centrally on the drilling sleeve and there are no unevenness on the feed transmission member for receiving dirt and chips.
  • the chains acting symmetrically on the relevant sleeve-shaped feed transmission link make it possible to Introduce feed force centrally and axially directed into the drilling spindle, all the more if the feature of claim 6 is additionally used.
  • the feed transmission member insofar as it emerges from the housing, can be completely smooth-walled.
  • Fig. 2 shows the same drilling spindle sleeve cut into a cranked Quer ⁇ , following ⁇ the line II-II of Fig. 1, except that a top left corner appears in FIG. 1 Board rotated relative to the other parts by 90 appears in approximately,
  • FIG. 3 shows the upper section of the drilling sleeve in question, together with the adjacent machine parts, in a somewhat modified embodiment, partially cut away,
  • Fig. 4 is a top view of the quill from Fig. 3, with a portion on the right side appears broken, and
  • the drilling sleeve 2 shown in FIGS. 1 and 2 has a drive spindle 4, which has a conventional cone 6 in the relevant tool holder 8, a milling spindle 12 rigidly mounted in a milling head 10 is received.
  • a drive spindle 4 which has a conventional cone 6 in the relevant tool holder 8
  • a milling spindle 12 rigidly mounted in a milling head 10 is received.
  • a drive spindle 4 which has a conventional cone 6 in the relevant tool holder 8
  • a milling spindle 12 rigidly mounted in a milling head 10 is received.
  • a milling spindle 12 rigidly mounted in a milling head 10 is received.
  • a 'profiled tightening bolt 14 ⁇ which is held by a screwed shaft 16 in the cone. 6
  • the drive spindle 4 carries a collar 18 on which a housing 22 is rotatably mounted relative to the drive spindle 4 by means of a so-called four-point bearing (a ball bearing which is equally stable in the axial and radial directions) 20 .
  • the four-point bearing 20 is covered on the outside by a profiled sealing ring 23.
  • the drive spindle 4 continues in a sleeve-shaped section 24. More precisely, it has in its interior a substantially cylindrical coaxial recess 26 which extends as far as the shaft 16 of the tightening bolt 14.
  • the drill spindle 30 directly carries an essentially conventional drill chuck 38, consisting of a bell 44 mounted on a flange 42 of the drill spindle 30 via a dense succession of balls 40, on which the Cone cap 46 of the drill chuck is screwed on, the jaws 48 mounted therein longitudinally and radially displaceably and one by means of a Left-hand thread in a corresponding coaxial threaded bore 50 of the drilling spindle 30 threaded bolt 52 with a head 54, in which the jaws 48 are mounted in corresponding radial grooves 56.
  • the cone cap 46 is rotated in the sense of tightening or loosening the drill chuck, the threaded bolt 52 is taken along, that is, screwed in more or less far.
  • Another comparable clamping device such as a collet chuck, could of course also take the place of the drill chuck 38.
  • a sleeve-shaped feed transmission member 60 is rotatable on the bell 44 relative to the drilling spindle 30, but is immovably mounted in the axial direction.
  • This feed transmission member 60 which engages over the sleeve-shaped section 24 of the drive spindle 4, is itself overlapped on the outside by a partially sleeve-shaped section 64 of the housing 22, which in any case ends in a closed ring 62.
  • the ring 62 On the inside, the ring 62 carries a sealing ring 66 which bears against the outer wall of the feed transmission member 60, just as the feed transmission member 60 is sealed outside of the four-point bearing 58 by means of a sealing ring 68 on the bell 44.
  • the housing 22 carries a clamping ring 70, on which a claw 74 is pivotally mounted in a radial plane with respect to the common spindle axis 76 between two lateral extensions 72.
  • the claw 74 is under the action of a spring 78 which tends to press the claw towards the milling head 10 (according to FIG. 1 upwards), where it engages with a fixing pin 80 embedded in the milling head.
  • the clamping ring 70 can on the housing 22 can be held by internal stress, which it receives through an axial slot in connection with an inner cylinder surface made with undersize. Alternatively, it can be designed like a clamp. Another possibility is described below with reference to FIGS. 3 and 4.
  • the housing 22 also has an eccentric, transverse bulge 82, in which a physical axis of rotation 84 is rotatably mounted by means of a feed drive element in the form of a turnstile 86.
  • a feed drive element in the form of a turnstile 86.
  • two sections 88 and 90 of a winding drum 92 are arranged, which are connected to one another by a differential bar 96 as if they were connected to an intermediate drive ring 94 that was keyed to the axis of rotation 84.
  • the differential bar 96 consists of a pin received by corresponding holes, which is able to assume a certain inclined position, at least in the tangential direction, so that one or the other of the two winding drum sections 88 and 90 has a certain advance or lag with respect to the axis of rotation 84 enable.
  • a chain (drive chain) 98 can be wound onto each of the two winding drum sections 88 and 90 in a single turn, the other end of which engages a lateral projection 100 at the inner end of the sleeve-shaped feed transmission member 60. More precisely, the two relevant points of attack 102 are diametrically opposite on both sides of the feed transmission element. Furthermore, the chains 98 are guided from there exactly parallel to the spindle axis 76 before they each run over a deflection roller 104 mounted in the housing 22 to the winding drum 92.
  • the feed transmission member 60 and him via the four-point bearing 58, the drilling spindle 30 can be driven out by winding the chains 98 in the sense that the drilling spindle experiences a feed movement with respect to the drive spindle 4 and the milling spindle 12.
  • the section of the feed transmission member 60 emerging from the housing 22, more precisely: the ring 62, is completely smooth on the outside, so that it does not tend to pick up and pull in dirt and chips.
  • a tension spring (return spring) 106 which is anchored at its other end, in the vicinity of the shaft 16 of the pull bolt 14, in the recess 26 of the drive spindle 4. A substantial part of the spring 106 is received by a corresponding recess 108 in the drilling spindle 30.
  • Deflecting rollers 112 can be wound onto one of the two winding drum sections 88 and 90 in the opposite sense.
  • the deflection rollers 112 are spring-mounted as tension rollers in the housing 22, in that a roller tappet 114 is guided in a bore 116 of the housing 22 and is loaded by a compression spring 118.
  • the chains 98 and 110 are so-called flyer chains. Since the chains 110 only have to apply a retraction force in addition to the spring 106, and this will be comparatively low, it does not matter that the chains 110 act eccentrically on the feed transmission member 60.
  • the axis of rotation 84 carries, outside the housing 22, at its end opposite the turnstile 86, an adjustable scale drum 120 which is opposite a marking 122 on the bulge 82 of the housing 22.
  • the above-described embodiment allows the axis of rotation 84 with the associated parts to be inserted the other way round into the housing bulge 82, and thus to make the feed drive suitable for left-handers.
  • the feed drive described above allows the axis of rotation of the feed drive member (turnstile 86) to be relatively close to the milling head, e.g. 10, to arrange, whereby, despite the compact construction, it occurs at a sufficient distance from the workpiece.
  • the drilling pin described so far is a precision mechanical device which, as such, naturally must not be subjected to excessive forces, on the other hand, especially if the axis of rotation of the feed drive member (turnstile 86) is relatively long because of a relatively unloading milling head If uncontrollable forces could be introduced into the drilling sleeve, an overload protection is provided.
  • the physical axis of rotation 84 ends outside the housing bulge 82 in a ball head 124 which surrounds a coaxial, approximately conical recess 126 which extends into the interior of the housing bulge 82, while a hub part 128 of the turnstile 86 faces one end of the ball head 124 has a matching spherical boundary surface 130.
  • Corresponding spherical catch recesses 132 are incorporated in the spherical head 124 as well as in the spherical delimitation surface 130, which receive spheres 136 guided by a spherically curved cage 134.
  • the balls 136 plate springs 138 provided in the hub part 128 are held under pressure via a tie rod 140, so that the balls 136 endeavor to keep the ball recesses 132 on both sides in correspondence.
  • the tie rod 140 consists of a flexible spring steel rod which is anchored in the axis of rotation 84 and which, when the balls 136 disengage, overcoming the spring force applied by the plate springs 138, is able to bend within the conical recess 126 and then return to its original to take a straight form.
  • the axis of rotation 84 with the subsequent parts is protected against excessive turning and bending forces. Accordingly, i.ü. also the storage of the housing 22 is made relatively light and space-saving, which in turn benefits the desired short overall length of the drilling sleeve.
  • the modified embodiment according to Figures 3 to 5 differs from 'those of Figures 1 and 2 only by the design of the mounted on the housing 22 the clamping ring, here designated 70 *, and the accommodated in the Gepatiuseausbuchtung 82 Effi ⁇ chen axis of rotation, here designated 84 ', including adjoining parts, which is why the other parts are not specifically labeled and described.
  • the clamping ring 70 ' is interrupted by an axial slot 142 and surrounded by a wire spring 146 lying in a groove 144.
  • the two ends 148 of the wire spring 146 appearing in the area of the slot 142 have eyelet-like bends 150 which are accommodated in a clip-like cap 152 in such a way that they are joined together by the cap 152 and the part of the wire spring 146 therebetween is thus held elastically under tension become.
  • the housing 22 is held in the clamping ring 70 in such a way that it does so is prevented from participating in the rotation of the drilling spindle 30, but on the other hand - should the turnstile 86 in its current position be a hindrance - it can be easily pivoted relative to the milling head 10 around the spindle axis 76 into another position.
  • the clamping ring 70 has two locking bolts 154 and 156, which are able to snap into the heads 158 of hexagon socket screws 160, as are usually ring-shaped for fixing the Bearing caps on such milling heads are used.
  • the latching bolts 154 and 156 are, substantially axially extending, each mounted in a substantially rectangularly profiled recess 162 within an eye 164 and 166 of the clamping ring, respectively, such that they can move longitudinally therein and can experience a radial inclination while they are in relation to tangential forces are guided relatively precisely.
  • the ratchet pins are fixed in the recess 162 by a tangential pin 168, which extends through an elongated hole 170 of the respective locking pin, and a helical compression spring 174, which is received by a longitudinal bore 172 of each locking pin and is supported on the pin 168, presses 3 upwards.
  • the locking bolt has a taper 176 suitable for engagement in the respective screw head 158.
  • This type of rotation lock eliminates any changes to the milling head in question.
  • Two eyes, 164 and 166, with corresponding locking bolts 154 and 156 are provided in the example described because the mounting radius and type of screws 160 are different for milling heads from different manufacturers or even for horizontal and vertical Generally distinguish milling heads from one and the same manufacturer. If necessary, more than two eyes can also be provided with locking bolts on the clamping ring 170.
  • a receptacle for a locking pin such as 154 can also be created by introducing a single small blind hole into the milling head or bearing cover in question.
  • the physical axis of rotation 84 'of the drill quill shown in FIGS. 3 and 4 has two ends 178 of the same design, each of which, in the usual way, each has a partially closed cross bore 180 with locking balls 182 and an intermediate helical compression spring 184. Outside the locking device formed in this way, the ends 178 of the axis of rotation 84 'are tapered, ending in cylindrical pins 186, while inside the locking device driving pins 188 are guided diagonally through the axis of rotation 84.
  • the correspondingly designed scale drum 120 'and, on the other hand, a hub part 128' are latched onto the same plug arrangements 190 formed in this way, which are correspondingly profiled on the inside for this purpose or provided with diagonal grooves 192 on the front for receiving the relevant driving pin 188. That the scale drum 120 'and the hub part 128' are interchangeable.
  • the scale drum 120 ' has a reversible scale ring 194.
  • the hub part 128 For overload protection (which in this case is limited to rotational forces), the hub part 128 'has a first hub body 196, which is on its outside end face. has a number, for example four, of a central extension 198 of this hub body running radially outwards, semi-cylindrical locking recesses 200.
  • the latching recesses 200 together with such latching recesses 202 of a second hub body 204, accommodate cylindrical latching bodies 206.
  • the upper half of the second hub body 204 in FIG. 3 is drawn in its normal position with respect to the first hub body 196, whereas the lower half together with the parts 206 and 208 are drawn in the disengaged state.
  • the latching bodies 206 are guided in the manner of a roller bearing in a cage 208 and through one of the first, such as partially. also the plastic ring 210 surrounding the second hub body 196 or 204 is prevented from falling out.
  • the first hub body 196 remains behind the second while overcoming the force of the spring 214 by the latching bodies 206.
  • the spring tension and thus also the releasing force in question can be set with the nut 216.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Drilling And Boring (AREA)

Abstract

Un fourreau de perçage (2) à insérer dans une broche porte-fraise fixe (12) comprend une broche d'entraînement (4) susceptible d'être insérée de manière en soi connue dans la broche porte-fraise, une broche de perçage (30) rigidement couplée à la broche d'entraînement, dans le sens de rotation, et axialement mobile par rapport à cette dernière, un logement rotativement monté sur la broche d'entraînement mais pouvant être bloqué de façon à ne pas tourner avec celle-ci, un organe de transmission d'avance (60) rotatif par rapport à la broche de perçage mais axialement fixe par rapport à celle-ci, tout en étant axialement mobile par rapport au logement mais fixe par rapport à celui-ci, dans le sens de rotation, et un organe (86) de commande de l'avance actionné manuellement, couplé par un engrenage à l'organe de transmission d'avance et monté dans le logement avec un axe transversal physique (84) de rotation. Afin d'obtenir une force d'avancement s'exerçant coaxialement à la broche de perçage, l'organe de transmission d'avance (60) a la forme d'un manchon qui entoure la broche de perçage et qui est accroché dans le sens axial à deux endroits (102) diamétralement opposés par des chaînes (98) guidées par des galets de déviation (104) et susceptibles d'être enroulées sur un tambour d'enroulement (92) agencé sur l'axe de rotation (84) de l'organe (86) de commande de l'avance.
PCT/EP1988/000751 1987-08-24 1988-08-22 Fourreau de perçage a inserer dans une broche porte-fraise Ceased WO1989001844A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP3728215.8 1987-08-24
DE19873728215 DE3728215C1 (de) 1987-08-24 1987-08-24 Bohrspindeleinheit zum Einsetzen in Fraesspindeln

Publications (1)

Publication Number Publication Date
WO1989001844A1 true WO1989001844A1 (fr) 1989-03-09

Family

ID=6334383

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1988/000751 Ceased WO1989001844A1 (fr) 1987-08-24 1988-08-22 Fourreau de perçage a inserer dans une broche porte-fraise

Country Status (4)

Country Link
EP (1) EP0378558A1 (fr)
JP (1) JPH02504609A (fr)
DE (1) DE3728215C1 (fr)
WO (1) WO1989001844A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9200681U1 (de) * 1992-01-22 1992-05-07 Friedr. Aug. Arnz "Flott" GmbH & Co, 5630 Remscheid Bohrmaschinenpinole mit Rückzugfeder

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1294336A (fr) * 1961-04-15 1962-05-26 Perfectionnements apportés aux perceuses ou analogues
US3348437A (en) * 1966-01-05 1967-10-24 Edmond A Pichette Offset-adjustable tool holder
FR2122813A5 (fr) * 1971-01-22 1972-09-01 Rochat Robert
DE7618268U1 (de) * 1976-06-09 1976-12-23 Fiedler, Hermann, 7313 Reichenbach Bohrpinole
DE2746639A1 (de) * 1977-10-17 1979-04-26 Philipp Pullmann Kranarbeiten Werkzeugmaschinentisch
EP0026724A1 (fr) * 1979-09-26 1981-04-08 Lectra Systemes S.A. Dispositif d'interconnexion de deux chariots mobiles guidés par des rails parallèles

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1294336A (fr) * 1961-04-15 1962-05-26 Perfectionnements apportés aux perceuses ou analogues
US3348437A (en) * 1966-01-05 1967-10-24 Edmond A Pichette Offset-adjustable tool holder
FR2122813A5 (fr) * 1971-01-22 1972-09-01 Rochat Robert
DE7618268U1 (de) * 1976-06-09 1976-12-23 Fiedler, Hermann, 7313 Reichenbach Bohrpinole
DE2746639A1 (de) * 1977-10-17 1979-04-26 Philipp Pullmann Kranarbeiten Werkzeugmaschinentisch
EP0026724A1 (fr) * 1979-09-26 1981-04-08 Lectra Systemes S.A. Dispositif d'interconnexion de deux chariots mobiles guidés par des rails parallèles

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9200681U1 (de) * 1992-01-22 1992-05-07 Friedr. Aug. Arnz "Flott" GmbH & Co, 5630 Remscheid Bohrmaschinenpinole mit Rückzugfeder

Also Published As

Publication number Publication date
JPH02504609A (ja) 1990-12-27
DE3728215C1 (de) 1989-01-19
EP0378558A1 (fr) 1990-07-25

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