EP0413725A1 - Procede et machine de decoupage de flancs de vis sans fin d'une seule piece - Google Patents

Procede et machine de decoupage de flancs de vis sans fin d'une seule piece

Info

Publication number
EP0413725A1
EP0413725A1 EP89905105A EP89905105A EP0413725A1 EP 0413725 A1 EP0413725 A1 EP 0413725A1 EP 89905105 A EP89905105 A EP 89905105A EP 89905105 A EP89905105 A EP 89905105A EP 0413725 A1 EP0413725 A1 EP 0413725A1
Authority
EP
European Patent Office
Prior art keywords
cutting
cutting tool
worm
carriage
shaft
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.)
Pending
Application number
EP89905105A
Other languages
German (de)
English (en)
Inventor
Otto Meichel
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.)
Krones AG
Original Assignee
Krones AG
Krones AG Hermann Kronseder Maschinenfabrik
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 Krones AG, Krones AG Hermann Kronseder Maschinenfabrik filed Critical Krones AG
Publication of EP0413725A1 publication Critical patent/EP0413725A1/fr
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23F—MAKING GEARS OR TOOTHED RACKS
    • B23F23/00—Accessories or equipment combined with or arranged in, or specially designed to form part of, gear-cutting machines
    • B23F23/12—Other devices, e.g. tool holders; Checking devices for controlling workpieces in machines for manufacturing gear teeth
    • B23F23/1237—Tool holders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C3/00—Milling particular work; Special milling operations; Machines therefor
    • B23C3/28—Grooving workpieces
    • B23C3/34—Milling grooves of other forms, e.g. circumferential
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23F—MAKING GEARS OR TOOTHED RACKS
    • B23F13/00—Making worms by methods essentially requiring the use of machines of the gear-cutting type
    • B23F13/02—Making worms of cylindrical shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
    • B23G1/00—Thread cutting; Automatic machines specially designed therefor
    • B23G1/32—Thread cutting; Automatic machines specially designed therefor by milling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/300056—Thread or helix generating
    • Y10T409/300112—Process
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/300056—Thread or helix generating
    • Y10T409/300392—Thread or helix generating with nonthread or nonhelix generating, milling cutter
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/300056—Thread or helix generating
    • Y10T409/300672—Thread or helix generating with means to rotate work and means to interrelatedly infeed the work relative to the cutter
    • Y10T409/300728—Means to infeed the cutter

Definitions

  • the invention relates to a method for cutting the
  • One-part screws of the type under consideration are used in container filling systems such as
  • Bottle filling systems are used to adjust an incoming sequence of containers to a certain distance that corresponds to the respective machine division distance.
  • parting screws are also arranged between successive stations of a filling system, so that the containers are transferred at a predetermined distance from one another.
  • the spiral groove is cut by means of a cutting tool rotating at high speed into a one-piece screw blank that rotates at a much lower speed, while either Cutting tool or the worm gear is moved at variable speed in the axial direction.
  • the rotating cutting tool is arranged opposite the feed screw blank in such a way that the shaft of the cutting tool is perpendicular to the longitudinal axis of the
  • the cutting tool has a rectilinear cutting edge and cuts the spiral groove with the required accuracy, regardless of the current screw pitch, without a flank error, so that the production of a single screw for rotationally symmetrical containers is largely problem-free.
  • the parting screw is intended for handling non-rotationally symmetrical shaped vessels, it should have a spiral groove with a cross-sectional area which is adapted to that of the shaped vessel to be handled.
  • the arrangement is made in such a case that the shaft of the cutting tool runs parallel to the longitudinal axis of the single-screw blank.
  • the cutting tool has a shape that corresponds exactly to the associated cross-sectional area of the molding vessel to be handled, when the groove is cut, as a result of its variable pitch, the screw flank error increases with increasing pitch, i.e. the spiral groove becomes narrower with increasing pitch, which means that an inclination or even crushing of the vessels occurs.
  • This worm flank error has hitherto been corrected by the fact that the cutting tool used has a certain oversize, but this has the disadvantage that the incised spiral groove only coincides with the molding vessel to be handled at a very specific pitch. In the other areas of the one-piece screw, however, the molding vessels are not correctly grasped and guided, since the slope usually increases from the beginning of the screw to the end.
  • the present invention is based on the object of further developing a method for cutting the flanks of one-piece screws of the type under consideration so that the occurrence of a screw flank error with variable screw pitches is largely avoided.
  • a single-screw cutting machine is to be specified with which a groove matched to the associated cross section of a molding vessel to be handled can be cut into a single-screw blank without a screw flank error at variable pitches.
  • the rotating cutting tool is moved oscillatingly up and down during the cutting process.
  • the cutting tool describes the vessel contour later captured by the parting screw, thereby avoiding the occurrence of the flank errors which have been customary up to now, so that a cutting tool can be used whose contours correspond to the associated cross-sectional section of the shaped vessels to be handled.
  • the molded vessels are thus correctly gripped and guided over the entire area of the parting screw, so that a smooth workflow is ensured in the area of the parting screw.
  • the spiral groove is first pre-cut in preferably two successive cutting processes without oscillation of the cutting tool and that a third cutting process is then carried out with the upward and downward oscillation of the cutting tool becomes.
  • the third The cutting process only has the task of eliminating the flank error generated in the first two cutting processes.
  • the rotating cutting tool be moved up and down at a speed of 7 to 8 double strokes per second, while the cutting tool should rotate at a speed of about 3800 to 4000 revolutions per minute.
  • the shaft of the cutting tool is fastened to a slide which is arranged on a guide perpendicular to the longitudinal axis of the parting screw and can be moved up and down.
  • the oscillating movement of the carriage is advantageously caused by a thrust crank driven by a motor.
  • the lifting height of the slide should be about 60 mm in both directions if the feed screw to be machined has the usual diameter.
  • the carriage expediently consists of cast aluminum, which makes it relatively light.
  • a first toothed belt connects a first gear driven by a motor with an intermediate gear which is connected via a second Toothed belt drives a third gear wheel, which is firmly seated on the shaft of the cutting tool, and that the intermediate gear wheel is arranged on a second carriage which is mounted so as to be displaceable.
  • This second carriage should be in one to guide the first carriage be guided in the vertical direction with respect to the feed screw movable back and forth.
  • the invention proposes with great advantage that the carriage with the cutting tool, the thrust crank and the associated belt drive are attached to a frame which is pivotably mounted about an axis perpendicular to the longitudinal axis of the worm gear, this pivot angle should be 90 °.
  • the shaft of the cutting tool can thus be pivoted from the position parallel to the longitudinal axis of the worm gear into a position perpendicular to this, which it assumes for cutting a worm gear for handling rotationally symmetrical containers.
  • the single-worm cutting machine according to the invention can be used to produce both types of single-worm screws, the cutting process of the groove corresponding to the rotationally symmetrical containers naturally taking place without an oscillating movement of the cutting tool.
  • the respective working days of the swiveling frame can be locked pneumatically.
  • a pneumatically acted locking bolt with a tapering head section in a corresponding shaped recess of the pivoting frame occurs. If the frame is to be pivoted into the other working position, the locking bolt is withdrawn from the recess in the frame.
  • Fig. 1 is a schematic diagram to explain the method according to the invention
  • Fig. 2 is a side view of the
  • FIG. 3 shows a front view of the cutting machine according to FIG. 1
  • Fig. 4 is a plan view of the cutting machine
  • Fig. 5 shows the pneumatic locking of the pivotable
  • R in FIG. 1 denotes a blank which consists of a cylindrical solid material, for example of plastic.
  • a thread pitch is now to be cut to produce a one-piece screw for molded vessels.
  • the blank is cut with the aid of the cutting tool S, which can be placed against the blank and at a high rate Speed around the shaft 2 is driven.
  • the blank rotates about the axis A R clockwise or counter clockwise.
  • the shape of the cutting tool S is matched to the shape of the shaped vessels that are to be transported later with the parting screw.
  • the cutting tool S When the shaft 2 of the cutting tool S is placed against the blank, the cutting tool S cuts an indentation corresponding to the shape of the cutting tool into the blank.
  • the shaft 2 runs parallel to the axis A R of the blank.
  • the cutting machine comprises three drive motors, namely a drive motor 1 for the shaft 2 of the cutting tool S indicated in FIG. 1, a drive motor 3 for a push crank 4 and a drive motor 5 for pivoting a frame 6 about an axis 7.
  • the drive motor 5 is connected to a rotary encoder 8.
  • the wave 2 of the Cutting tool is rotatably mounted in a carriage 9.
  • the carriage 9 on the one hand is on a guide
  • Carriage causes the oscillating up and down movement of the cutting tool S indicated by P up and P down in FIG. 1.
  • the carriage 9 is articulated to a lower end of the crank 4.
  • the upper end of the push crank is eccentric on a disc
  • the drive motor 1 serves to drive the knife shaft 2.
  • the drive motor is via a first toothed belt
  • the second toothed belt 14 extends at an angle of approximately 90 to the first toothed belt 12.
  • the intermediate toothed wheel 13 is fastened on a second slide 16.
  • This carriage in turn is seated on a guide 17 and is arranged to be movable horizontally forwards and backwards in this guide.
  • a U-profile 18 is provided with elongated holes, not shown, which are penetrated by locking screws 19. Through the part 18, a connection between the gears 13 and 15 is made at the same time.
  • the toothed belt 12 is pretensioned by tightening a screw nut 20, whereby an extension 21 for the intermediate gear 13 is pivoted about an axis 22 on which the bracket 21 is articulated with the slide 16 is connected.
  • the push crank causes an upward and downward oscillating movement of the carriage 9 and the shaft 2 attached thereto with the cutting tool, which is in a slot 23 in the shaft (see Fig. 3) is attached interchangeably.
  • the lifting movements of the carriage 9 would in themselves lead to an elongation of the second toothed belt 14, since the shaft 2 is not moved back and forth in a circular manner about the axis of the intermediate gear 13, but is moved up and down in a straight line in the vertical direction over the carriage 9.
  • the sled 16 is movably mounted in the horizontal plane along the guide 17, the sled is moved by the pull caused by the upward and downward movement of the shaft 2 via the U-profile 18 in FIG. 2 in each
  • the frame 6, on which the sliding crank 4 with the associated rotatable disk 11, the slide 9, the shaft 2 and its drive are fastened, is pivotably articulated on a fixed frame 24, the center of the shaft 2 and the slot 23 for receiving of the tool lie on the pivot axis 7.
  • the shaft 2 is pivoted from its horizontal position shown in the figures into the vertical position in which one-piece screws for rotationally symmetrical containers are cut without oscillation.
  • a pneumatically actuated locking bolt 25 with a conically tapering head section 26 enters a correspondingly shaped recess 27 in the swivel frame 6 in order to lock it in the working position (FIG. 5).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Milling Processes (AREA)
  • Crushing And Grinding (AREA)
  • Screw Conveyors (AREA)
  • Transmission Devices (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Shearing Machines (AREA)

Abstract

On utilise des vis sans fin d'une seule pièce dans des installations de remplissage de conteneurs afin de maintenir un écart prédéterminé entre des conteneurs successifs. On découpe des vis sans fin d'une seule pièce pour récipients moulés sans symétrie de rotation avec un outil de découpage (5), tournant à une vitesse de rotation rapide et dont l'arbre (2) est parallèle à l'axe longitudinal (AR) de l'ébauche (R) de la vis sans fin d'une seule pièce, qui tourne à une vitesse de rotation plus faible. Afin d'éviter les défauts sur les flancs de la vis, on fait osciller de bas en haut et de haut en bas l'outil de découpage, de sorte que l'on peut utiliser un outil de découpage dont le contour correspond exactement à la partie correspondante de la section transversale du conteneur à manipuler. Dans une machine de découpage de vis sans fin d'une seule pièce, l'arbre (2) de l'outil de découpage est assujetti à un chariot (6) déplacé vers le haut et vers le bas par une manivelle de poussée (4).
EP89905105A 1988-04-27 1989-04-26 Procede et machine de decoupage de flancs de vis sans fin d'une seule piece Pending EP0413725A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3814241A DE3814241C1 (fr) 1988-04-27 1988-04-27
DE3814241 1988-04-27

Publications (1)

Publication Number Publication Date
EP0413725A1 true EP0413725A1 (fr) 1991-02-27

Family

ID=6353020

Family Applications (2)

Application Number Title Priority Date Filing Date
EP89107501A Expired - Lifetime EP0341485B1 (fr) 1988-04-27 1989-04-26 Méthode de coupe des flancs de vis sans fin en une pièce et machine de coupe de ces vis sans fin
EP89905105A Pending EP0413725A1 (fr) 1988-04-27 1989-04-26 Procede et machine de decoupage de flancs de vis sans fin d'une seule piece

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP89107501A Expired - Lifetime EP0341485B1 (fr) 1988-04-27 1989-04-26 Méthode de coupe des flancs de vis sans fin en une pièce et machine de coupe de ces vis sans fin

Country Status (9)

Country Link
US (1) US5188491A (fr)
EP (2) EP0341485B1 (fr)
JP (1) JPH0818183B2 (fr)
AT (1) ATE82176T1 (fr)
CA (1) CA1327136C (fr)
DE (1) DE3814241C1 (fr)
ES (1) ES2038368T3 (fr)
GR (1) GR3006804T3 (fr)
WO (1) WO1989010225A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10102341A1 (de) * 2001-01-19 2002-08-08 Ralf Steffens Profilkontur einer Schraubenspindelpumpe
JP5759193B2 (ja) * 2011-02-03 2015-08-05 グンゼ株式会社 ネジ加工システムおよびその加工方法
CN103600114B (zh) * 2013-11-11 2015-12-16 慈溪市恒立密封材料有限公司 一种全自动缠绕垫外环铣槽机
CN106270683B (zh) * 2016-08-20 2018-05-15 慈溪埃弗龙密封件有限公司 一种缠绕垫片外环铣槽设备及其使用方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1344607A (en) * 1918-05-15 1920-06-22 Witold Samotej Manufacture of thread-gages
FR521180A (fr) * 1920-07-26 1921-07-07 Louis Pecheur Perfectionnements aux tours
US2551359A (en) * 1943-02-04 1951-05-01 Rudolph F Bannow Slotting machine operating at universal angles in overall locations
DE3527966A1 (de) * 1984-08-17 1986-02-27 Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen Bearbeitungsanordnung
JPS637210A (ja) * 1986-06-28 1988-01-13 Nippon Chikasui Kaihatsu Kk ストレーナー管スリット加工方法、及びその装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8910225A1 *

Also Published As

Publication number Publication date
EP0341485B1 (fr) 1992-11-11
ES2038368T3 (es) 1993-07-16
JPH03503989A (ja) 1991-09-05
WO1989010225A1 (fr) 1989-11-02
EP0341485A1 (fr) 1989-11-15
JPH0818183B2 (ja) 1996-02-28
ATE82176T1 (de) 1992-11-15
DE3814241C1 (fr) 1989-05-03
GR3006804T3 (fr) 1993-06-30
US5188491A (en) 1993-02-23
CA1327136C (fr) 1994-02-22

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