EP2258495B1 - Hydraulic fine-blanking head for a press and method for moving same - Google Patents

Hydraulic fine-blanking head for a press and method for moving same Download PDF

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Publication number
EP2258495B1
EP2258495B1 EP20090007352 EP09007352A EP2258495B1 EP 2258495 B1 EP2258495 B1 EP 2258495B1 EP 20090007352 EP20090007352 EP 20090007352 EP 09007352 A EP09007352 A EP 09007352A EP 2258495 B1 EP2258495 B1 EP 2258495B1
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EP
European Patent Office
Prior art keywords
pressure
fine blanking
head according
adjusting nut
hydraulic
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.)
Active
Application number
EP20090007352
Other languages
German (de)
French (fr)
Other versions
EP2258495A1 (en
Inventor
Markus Dipl.-Ing. Schaltegger
Alfio M-Ing. Cristofaro
Jürg M-Ing. Ochsenbein
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.)
Feintool Intellectual Property AG
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Feintool Intellectual Property AG
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 Feintool Intellectual Property AG filed Critical Feintool Intellectual Property AG
Priority to EP20090007352 priority Critical patent/EP2258495B1/en
Priority to AT09007352T priority patent/ATE533574T1/en
Priority to CA2705666A priority patent/CA2705666C/en
Priority to JP2010126758A priority patent/JP5715769B2/en
Priority to KR1020100052462A priority patent/KR101722782B1/en
Priority to CN201010197598XA priority patent/CN101905264A/en
Priority to US12/792,977 priority patent/US8141482B2/en
Publication of EP2258495A1 publication Critical patent/EP2258495A1/en
Application granted granted Critical
Publication of EP2258495B1 publication Critical patent/EP2258495B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/0029—Details of, or accessories for, presses; Auxiliary measures in connection with pressing means for adjusting the space between the press slide and the press table, i.e. the shut height
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/16—Shoulder or burr prevention, e.g. fine-blanking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/002—Drive of the tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/14—Dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/06—Platens or press rams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/16—Control arrangements for fluid-driven presses
    • 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
    • Y10T83/00—Cutting
    • Y10T83/04—Processes
    • Y10T83/06—Blanking
    • 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
    • Y10T83/00—Cutting
    • Y10T83/869—Means to drive or to guide tool
    • Y10T83/8691—Unicyclic
    • Y10T83/8694—With brake or blocking means
    • 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
    • Y10T83/00—Cutting
    • Y10T83/869—Means to drive or to guide tool
    • Y10T83/8696—Means to change datum plane of tool or tool presser stroke

Definitions

  • the invention relates to a hydraulic fine blanking head for a mechanical press, in particular fineblanking press, which is held on a machine frame of the press head above a table top bearing, a lifting movement performing ram axially aligned with the lifting axis, with a tubular part formed in the headpiece of a flange whose collar is secured against rotation by screw on the side facing the plunger side of the head piece, with a concentric inserted in the tubular part master cylinder, arranged within the master cylinder pistons and bolts, the master cylinder with a pressure-tight lid or a holding plate is closed, and a hydraulic system for supplying the master cylinder with a fluid adjusted to a predetermined pressure.
  • the invention further relates to a method for feeding a hydraulic fine cutting head in a press, in particular fineblanking press, in which guided in the master cylinder of the fine blanking head piston and bolt for generating a pressure and or deformation force with an adjustable pressure of a hydraulic fluid from a high pressure source of a hydraulic Systems are acted upon and the press ram is driven mechanically or hydraulically.
  • the present invention seeks to develop a hydraulic fine cutting head for presses and a method for feeding a fine cutting head of the type mentioned, which is or to prevent the axial clearance between the adjusting elements during the cutting operation safe, to ensure a high infeed and repeat accuracy while improving operational safety in continuous operation.
  • the solution according to the invention is based on the knowledge that the adjustment function for the delivery of the fineblanking head should be integrated into existing functional elements of the head, i. an adjusting mechanism of a provided with an internal movement thread, rotatable about the stroke axis of the plunger lock nut, a frictionally mounted on an end face of the adjusting nut, arranged perpendicular to the Hubachse sprocket, held on the head hydraulic motor with drive shaft, the drive shaft of the motor and the sprocket wraps around Provide drive chain, one on the drive shaft undeliverable brake and attached to the head of the master cylinder outer movement thread.
  • the outer movement thread of the master cylinder is guided by the inner movement thread of the adjusting nut with axial play, wherein the movement thread via a common channel for supplying and discharging the set on a locking or unlocking fluid of the hydraulic system for the purpose of axial game suspension or clearance of the game between the Threads are related.
  • the delivery of the master cylinder with respect to the plunger is done by switching off the engine and switching on the brake as soon as the pistons and bolts are depressurized.
  • the adjusting nut on a shoulder having a paragraph, facing away from the plunger wall portion of the head piece is axially fixed and held by the tubular part of the flange against the lifting movement of the plunger. This makes it possible to reduce the number of parts and the mass of the fine cutting head.
  • the channel for supplying the fluid to the movement threads is connected by a line to a low-pressure hydraulic system via a switchable directional control valve for opening and closing the line.
  • a switchable directional control valve for opening and closing the line.
  • the head piece and the adjusting nut is provided with at least one channel which opens into the movement thread for supplying the thread with lubricant, whereby the ease of movement of the adjusting nut is ensured.
  • at least one further channel for discharging lubricant from the movement threads is provided, so that a continuous lubrication of the movement thread is made possible in each case via a line connected to the channels and connected to a lubricant reservoir.
  • the movement thread of adjusting nut and master cylinder are designed as PSDgegewinde that allow a one-sided static load during axial pressurization with hydraulic fluid under lock pressure, whereby the movement thread of the master cylinder against the movement thread of the adjusting nut and latter against the heel on the head suppressed. All fit games are then canceled and the actuating mechanism is locked in case of concern the displacement or working pressure.
  • An advantageous further embodiment of the fine cutting head according to the invention provides that the hydraulic motor is connected to a connected to a high-pressure hydraulic system feed and a discharge via a pilot proportional valve with which the speed of the motor via the setting to a certain preselectable control pressure is controlled accordingly ,
  • the brake which is operatively connected to the engine, to be connected by a line to the high-pressure hydraulic system via a switchable directional control valve for connecting and disconnecting the brake, thereby enabling an exact positionally accurate infeed of the fineblanking head according to the invention.
  • the drive chain is a hollow bolt chain, which engages expediently in the ring gear on the adjusting nut, wherein the sprocket can be associated with at least one further sprocket whose axis of rotation is arranged offset parallel to the sprocket of the adjusting nut on a supported on the head plate.
  • the sprockets lie horizontally in alignment with each other in a plane, so that a torsion-free drive of the hollow bolt chain is ensured.
  • a keypad is arranged on the plunger facing the holding plate, which is arranged against rotation in the tubular part of the flange axially parallel to the lifting axis guided in holes of the tubular part securing bolt.
  • An embodiment of the fine blanking head according to the invention which is particularly preferred for fineblanking processes provides for a ring-toothed piston for pressing the ring-toothed tooth into a workpiece to be machined, a plurality of ring-toothed pins coaxially supporting the ring-toothed piston and a feeler piston for detecting a stroke path provided between the holding plate and the keypad relative to one another Hubachse lying are added.
  • a the serrated pin coaxial with the lifting axis supporting pressure plate is arranged, in which a center support is provided in alignment of the lifting axis, wherein the Pressure plate is held by a retaining ring on the keypad.
  • the fine blanking head according to the invention is suitable not only for mechanically driven presses but also for hydraulic presses. By integrating the adjustment in the fine blanking succeeds to prevent the axial clearance between the adjusting elements during cutting safely, to ensure a high delivery and repeat accuracy while improving the reliability in continuous operation.
  • Fig. 1 a perspective view of the press with mounted in the head of the press fine cutting head according to the invention
  • Fig. 2 a section of the invention Fine cutting head in retracted state
  • Fig. 3 a section of the fine cutting head according to the invention in the extended state
  • Fig. 4 a top view of Fig. 1 in the extended state of the fine cutting head according to the invention
  • Fig. 5 a representation of the channel for supplying hydraulic fluid into the movement thread of the adjusting mechanism as a section AA of Fig. 4
  • Fig. 6 a perspective view of the actuating mechanism with hydraulic motor and hollow pin chain
  • Fig. 7 a plan view of the hydraulic motor with sprockets
  • Fig. 8 a hydraulic circuit diagram of Kpfver ein.
  • the Fig. 1 shows a perspective view of a mechanically operated fineblanking press of the toggle lever design.
  • the ram 1 of this press carrying a table top carries out a lifting movement in the direction of the lifting axis HU and in the direction of the head piece 2 of the press.
  • the fine cutting head 3 according to the invention is arranged in alignment with the stroke axis HU.
  • the Fig. 2 shows the fine cutting head 3 according to the invention in a sectional view.
  • the fine cutting head 3 is used as a compact unit in a receptacle in the head piece 2 and fixed there in a form-fitting manner.
  • the fine cutting head 3 according to the invention comprises an adjusting nut 6, ring gear 7, hydraulic motor 8, rotary encoder 4, drive chain 9 and master cylinder 10 assembled actuating mechanism 11 (see Fig. 6 ).
  • the rotatable about the stroke axis HU adjusting nut 6 and along the lifting axis HU displaceable master cylinder 10 are provided with movement threads 12 and 13 in the form of mutually matched in the flank angle sawing, which are coaxial with the stroke axis HU engaged, so that upon rotation of the adjusting nut. 6 the master cylinder 10 from a retracted to an extended position (see Figure 3 ) in relation to the plunger 1 can be brought.
  • the master cylinder is adjustable to the plunger 1 in height.
  • the head piece 2 has a step-like shoulder 15 projecting in the direction of the lifting axis HU, which is formed on the inner wall 14 of the head piece 2 on the head side and away from the plunger.
  • the collar 20 of the flange 19 is like Fig. 3 shows fixed on the ram-facing side by screw 21 frontally on the head piece 2.
  • In the collar 20 of the flange 19 are two diametrically opposite lying bores 22 are provided, which are introduced parallel to the lifting axis HU in the interior of the tubular part 18. These bores 22 serve to receive bolt-like anti-rotation devices 23 which axially guide a main plate 24 closing the main cylinder 10.
  • the end 25 of the anti-rotation 23 is fixed by a screw.
  • a serrated piston 27 and a Tastkolben 28 are received axially aligned with each other.
  • the serrated piston 27 is in mechanical abutment with the master cylinder 10.
  • the sensing piston 28 is hydraulically brought into positive connection with the serration pin 27.
  • the serrated pins 29 pass through the main plate 24 and are mounted on a serrated pressure plate 30 which is secured by a ring-holder ring 31 fixed to the scanning table 26.
  • the center support 32 is held, which supports the tool during the technology phase.
  • the master cylinder 10 is closed pressure-tight on the head side with a ring-toothed cover 33.
  • a ring-toothed cover 33 At the upper end face 34 of the adjusting nut 6 of the ring gear 7 is fixed non-positively, which rotates about the drive chain 9, for example, hollow pin chain, and the hydraulic motor 8, the adjusting nut 6 about their coincidence with the stroke axis HU axis.
  • the structure of this drive is described in section [0043].
  • the tubular part 18 of the flange 19 has on its the Hubachse HU facing inner wall 38 in the direction of lifting axis HU projecting step-like upper Paragraph 39 and another arranged below the paragraph 39 in the direction of lifting axis HU protruding paragraph 40.
  • the upper paragraph 39 has compared to the paragraph 40 a significantly larger heel height H, so that the inner wall 38 of the tubular member 18 in two mutually staggered axial support surfaces M1 and M2 is split for slidably supporting a correspondingly formed master cylinder 10.
  • the outer movement thread 13 on the head 41 of the master cylinder 10 extends over the entire length of the inner movement thread 12 of the adjusting nut 6, wherein the outer movement thread 13 on the head 41 of the master cylinder 10 at an upper in the direction of lifting axis HU recessed paragraph 43 of the outer wall 42 of the master cylinder 10 ends.
  • the outer wall 42 has a further lower shoulder 44 offset from the movement thread 13 in the direction of the lifting axis HU, so that two mutually offset support surfaces M3 and M4 for slidably supporting on the lateral surfaces M1 and M2 of the tubular part 18 are formed on the outer wall 42 of the master cylinder 10.
  • the movement threads 12 and 13 of the adjusting mechanism 11 are -as Fig. 2 retracted, so that below the movement threads 12 and 13, a clearance 45 is formed by the upper shoulder 39 of the tubular part 18, the movement thread 13 associated upper shoulder 43 on the outer wall 42 of the master cylinder 10 and the corresponding areas of the inner wall 38 and Outside wall 42 is limited.
  • This space 45 is via a channel 46 in the wall of the tubular part 18 and a channel 47 in the wall of the Head piece 2 is connected to a line 48 for discharging lubricant in a reservoir of a lubrication system not shown.
  • a further channel 49 is guided through the wall of the head piece 2 and a channel 50 through the wall of the adjusting nut 6, wherein the channel 50 opens into the movement thread 12 of the adjusting nut 6 for supplying lubricant.
  • the channel 49 is connected to a line 51, in which via a pump lubricant in the motion thread 12 and 13 can be fed.
  • the main cylinder 10 is supported with its axial support surfaces M3 and M4 on the axial support surfaces M1 and M2 of the tubular member 18 from.
  • an axially extending narrow space 52 Between the lower shoulder 44 of the outer wall 42 of the master cylinder 10 and the lower shoulder 40 of the inner wall 38 of the tubular member 18 is formed an axially extending narrow space 52.
  • a feed channel 54 which leads via a feed line 61 to a pressure line 53 of a Low-pressure hydraulic system is connected.
  • the feed channel 54 penetrates the wall of the Ko 5 and the wall of the tubular part 18.
  • the pressure line 53 is connected to a hydraulic system via a directional control valve 55 (see Fig. 8 ), which reduces the pressure of the hydraulic system to a sufficient magnitude for locking the movement threads 12 and 13.
  • Fig. 3 the fine cutting head 3 according to the invention is shown in the extended state of the movement thread 12 and 13.
  • the master cylinder 10 has moved by the rotation of the adjusting nut 6 with its upper shoulder 43 on the outer wall 42 to the upper shoulder 39 on the inner wall 38 of the tubular member 18 and is at a defined distance from Paragraph 39 held.
  • the maximum infeed height of the fine cutting head 3 with respect to the plunger 1 of the press is determined by means of a rotary encoder 4 on the hydraulic motor 8.
  • the master cylinder 10 has then adjusted the fine blanking plate 24 together with the keypad 26 by a corresponding amount to the plunger 1 out.
  • the Fig. 4 and 5 illustrate the location of the feed channel 56. Via the space 52, the surfaces 40 and 44 are hydraulically pressed in the opposite direction, so that set by the directional control valve 55 locking pressure of the hydraulic fluid can push the movement thread 13 of the master cylinder 10 against the movement thread 12 of the adjusting nut 6, which leads to the locking of the movement thread.
  • the Fig. 6 and 7 show the adjusting mechanism at the head of the fine cutting head according to the invention with the hydraulic motor 8 fixed to the head 2, drive chain 9, for example, hollow pin chain, and the encoder 4.
  • drive chain 9 for example, hollow pin chain
  • the Drive chain 9 wraps around the sprockets 7 and 35 torsion.
  • the hydraulic motor 8 is connected via a supply line 62 and a proportional valve 37 to the high-pressure hydraulic system.
  • a discharge line 58 connects the hydraulic motor 8 via the proportional valve 37 with a tank line 53.
  • Acts on the axis of the ring gear 35 a brake 59, which is connected to a supply line 60 via the directional control valve 55 to the hydraulic system.
  • the hydraulic system consists of a pressure line 62, which is stretched by a pressure source, not shown, to a pressure of 65 bar, and the tank line 53rd
  • the proportional line 37 is pilot-controlled to a presettable target pressure and regulates the applied pressure of the hydraulic fluid to a setting pressure in the range of 0 to 250 bar, preferably 220 bar for the adjusting nut 6 a
  • the proportional valve 37 is designed as a 4/3-way valve with locking middle position, so that the hydraulic motor 8 is always switched from the blocking function in the open function when the locking of the movement thread 12 and 13 described in more detail below and repositioned the fine cutting head 3 according to the invention with respect to the plunger 1 to be made.
  • the proportional valve 37 switches back into the closed position and the brake 59 thus holds the new position. This is done by opening the directional control valve 55,
  • the supply line 53 branches off, the hydraulic fluid via the directional control valve 55 through the channels 54 in the wall of the flange 19 and the tubular member 18 via the channel 56th into the free space 52, which supplies the hydraulic fluid to the actuating mechanism 11.
  • the directional control valve 55 allows the hydraulic fluid to pass, so that a secure locking of the movement thread 12 and 13 is ensured.
  • the motion thread remain locked, so that an adjustment of the feed height of the fine cutting head 3 with respect to the plunger is not possible.
  • the process according to the invention proceeds as follows:
  • the movement thread 12 of the threaded nut 6 and the movement thread 13 of the master cylinder 10 are hydraulically locked in the axial direction during the application of the compressive and deforming force by a permanent supply of a fluid adjusted to locking pressure.
  • the two movement threads are unlocked after completion of the application of the pressure and deformation force by switching off or shutting off the hydraulic fluid, so that the movement thread of the adjusting mechanism have a movement play.
  • a hydraulic motor 8 is set in operation, the sprocket 7 and a drive chain 9, the movement thread 12 of the adjusting nut 6 rotates until the master cylinder 10 its predetermined position with respect to has reached the plunger 1 by means of the encoder 4.
  • the hydraulic motor 8 is switched off by shutting off the hydraulic fluid and brought the drive shaft of the motor 8 with the brake 59 to a standstill.
  • the locking pressure for the movement threads 12 and 13 is switched on again, so that when concerns the Rangkackenund / or forming the movement thread on the force curve are completely free of play.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Actuator (AREA)
  • Presses And Accessory Devices Thereof (AREA)
  • Transmission Devices (AREA)
  • Press Drives And Press Lines (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Abstract

The hydraulic fine blanking head has an adjusting mechanism with an adjusting nut (6) provided with an internal motion thread, turnable around a stroke axis, and a sprocket wheel is fixed at a frontal surface (34) of the adjusting nut vertically arranged to the stroke axis. A hydraulic motor is held at a head piece (2) with a motor shaft, where a driving chain runs around the shaft of the motor and the sprocket wheel. An independent claim is also included for a method for feeding a hydraulic fine blanking head.

Description

Die Erfindung betrifft einen hydraulischen Feinschneidkopf für eine mechanische Presse, insbesondere Feinschneidpresse, der auf einem Maschinengestell der Presse aufgesetzten Kopfstück oberhalb eines eine Tischplatte tragenden, eine Hubbewegung ausführenden Stößels axial fluchtend zu dessen Hubachse gehalten ist, mit einem im Kopfstück eingesetzten rohrartig ausgebildeten Teil eines Flansches, dessen Bund durch Schraubverbindungen auf der zum Stößel zugewandten Seite des Kopfstücks verdrehsicher befestigt ist, mit einem im rohrartigen Teil konzentrisch eingeschobenen Hauptzylinder, mit innerhalb des Hauptzylinders angeordneten Kolben und Bolzen, wobei der Hauptzylinder mit einem Deckel druckdicht bzw. einer Halteplatte verschlossen ist, und einem Hydrauliksystem zur Versorgung des Hauptzylinders mit einem auf einen vorgegebenen Druck eingestellten Fluid.The invention relates to a hydraulic fine blanking head for a mechanical press, in particular fineblanking press, which is held on a machine frame of the press head above a table top bearing, a lifting movement performing ram axially aligned with the lifting axis, with a tubular part formed in the headpiece of a flange whose collar is secured against rotation by screw on the side facing the plunger side of the head piece, with a concentric inserted in the tubular part master cylinder, arranged within the master cylinder pistons and bolts, the master cylinder with a pressure-tight lid or a holding plate is closed, and a hydraulic system for supplying the master cylinder with a fluid adjusted to a predetermined pressure.

Die Erfindung betrifft des Weiteren ein Verfahren zum Zustellen eines hydraulischen Feinschneidkopfes in einer Presse, insbesondere Feinschneidpresse, bei dem die im Hauptzylinder des Feinschneidkopfes geführten Kolben und Bolzen zum Erzeugen einer Druck- und oder Verformungskraft mit einem einstellbaren Druck eines hydraulisches Fluides aus einer Hochdruckquelle eines hydraulischen Systems beaufschlagt werden und der Pressenstößel mechanisch oder hydraulisch angetrieben wird.The invention further relates to a method for feeding a hydraulic fine cutting head in a press, in particular fineblanking press, in which guided in the master cylinder of the fine blanking head piston and bolt for generating a pressure and or deformation force with an adjustable pressure of a hydraulic fluid from a high pressure source of a hydraulic Systems are acted upon and the press ram is driven mechanically or hydraulically.

Stand der TechnikState of the art

Aus der DE 1 279 622 A1 ist eine Feinstanzpresse mit einem Schnittkolben, einem das Blechwerkstück auf dem Pressentisch andrückenden Presskolben und einem den auszustanzenden Teil des Werkstückes unterstützenden Gegendruckkolben bekannt, bei der im Pressenkopf eine Verstellspindel für die Verstellung eines Anschlagflansches sitzt, der den Hub des beweglichen Joches nach oben begrenzt. Der untere Hubbegrenzungsanschlag des beweglichen Joches wird durch Verdrehen von ineinandergehenden Gewindezylindern eingestellt. Die Feinverstellung der Gewindeverstellung erfolgt mittels eines Handrades über eine Schnecke auf ein unten am äußeren Gewindezylinder direkt angebrachtes Zahnrad, während für die Schnellverstellung ein Elektromotor vorgesehen ist, der die Schnecke über zwei Kegelräder antreibt.
Diese bekannte Höhenverstellung des Schneidkopfes erlaubt bedingt durch die Handbedienung keine hinreichende Verstellund Zustellgenauigkeit in Bezug auf die Höhenlage des Kopfes. Außerdem ist von Nachteil, dass die Wiederholgenauigkeit der Einstellung gering ist, wodurch die Qualität der Feinschneidteile leidet.
Ein weiterer Nachteil besteht darin, dass während des Schneidbetriebs eine Spindelverdrehung durch das naturgemäß vorhandene axiale Spiel zwischen den Zylindern nicht ausgeschlossen werden kann.From the DE 1 279 622 A1 is a fine blanking press with a cutting piston, the sheet metal workpiece on the press table pressing piston and a supporting the auszuschanzenden part of the workpiece counter-pressure piston known in the press head an adjusting spindle for the adjustment of a stop flange sits, which limits the stroke of the movable yoke upwards. The lower stroke limit stop of the movable yoke is adjusted by turning of meshing threaded cylinders. The fine adjustment of the thread adjustment by means of a handwheel via a worm on a bottom of the outer threaded cylinder directly attached gear, while for rapid adjustment, an electric motor is provided which drives the worm via two bevel gears.
This known height adjustment of the cutting head allows due to the manual operation no sufficient adjustment and Zustellgenauigkeit with respect to the altitude of the head. It is also disadvantageous that the repeatability of the Setting is low, which suffers the quality of Feinschneidteile.
Another disadvantage is that during the cutting operation, a spindle rotation can not be excluded by the naturally existing axial clearance between the cylinders.

Andere bekannte Lösungen setzen zum Einstellen des Abstandes zwischen einem am Stößel einer Presse befestigten, mit einem auf dem Pressentisch befestigten Unterwerkzeug zusammenarbeitenden Oberwerkzeug und dem Stößel Druckkeilanordnungen ( DE 2 039 644 A1 ) oder hydraulisch betätigte Zylinder ( DE 198 22 436 A1 ) ein. Diese bekannten Lösungen sind jedoch für Feinschneidpressen wegen des Zusammenwirkens von Schneidkolben, Ringzackenkolben, und Ringzackenbolzen ungeeignet.Other known solutions use for adjusting the distance between a fixed to the plunger of a press, cooperating with a lower tool mounted on the lower die and the plunger pressure wedge assemblies ( DE 2 039 644 A1 ) or hydraulically actuated cylinders ( DE 198 22 436 A1 ) one. However, these known solutions are unsuitable for fineblanking presses because of the interaction of cutting piston, ring-necked piston, and serrated bolt.

Aufgabenstellungtask

Bei diesem Stand der Technik liegt der Erfindung die Aufgabe zugrunde, einen hydraulischen Feinschneidkopf für Pressen und ein Verfahren zum Zustellen eines Feinschneidkopfes der eingangs genannten Gattung zu entwickeln, der bzw. das geeignet ist, das Axialspiel zwischen den Verstellelementen während des Schneidbetriebs sicher zu verhindern, eine hohe Zustell- und Wiederholgenauigkeit untergleichzeitiger Verbesserung der Betriebssicherheit im Dauerbetrieb zu gewährleisten.In this prior art, the present invention seeks to develop a hydraulic fine cutting head for presses and a method for feeding a fine cutting head of the type mentioned, which is or to prevent the axial clearance between the adjusting elements during the cutting operation safe, to ensure a high infeed and repeat accuracy while improving operational safety in continuous operation.

Diese Aufgabe wird durch einen Feinschneidkopf der eingangs genannten Art mit den Merkmalen des Anspruchs 1 und durch ein Verfahren mit den Merkmalen des Anspruchs 15 gelöst.This object is achieved by a fine cutting head of the type mentioned at the outset with the features of claim 1 and solved by a method having the features of claim 15.

Vorteilhafte Ausgestaltungen des erfindungsgemäßen Feinschneidkopfes und Verfahrens sind den Unteransprüchen entnehmbarAdvantageous embodiments of the fine blanking head according to the invention and method are the dependent claims

Die erfindungsgemäßen Lösung geht von Erkenntnis aus, die Verstellfunktion für die Zustellung des Feinschneidkopfes in vorhandene Funktionselemente des Kopfes zu integrieren, d.h. einen Stellmechanismus aus einer mit einem inneren Bewegungsgewinde versehenen, um die Hubachse des Stößels drehbaren Stellmutter, einem an einer Stirnseite der Stellmutter kraftschlüssig befestigten, senkrecht zur Hubachse angeordneten Zahnkranz, einem am Kopfstück gehaltenen Hydraulikmotor mit Antriebswelle, einer die Antriebswelle des Motors und den Zahnkranz umschlingenden Antriebskette, einer auf die Antriebswelle zustellbaren Bremse und einem am Kopf des Hauptzylinders angebrachten äußeren Bewegungsgewinde vorzusehen. Das äußere Bewegungsgewinde des Hauptzylinders wird vom inneren Bewegungsgewinde der Stellmutter mit axialen Spiel geführt, wobei die Bewegungsgewinde über einen gemeinsamen Kanal zum Zu- und Abführen des auf einen Verriegelungs- bzw. Entriegelungsdruck eingestellten Fluides des Hydrauliksystems zwecks axialer Spielaufhebung bzw. Freigabe des Spiels zwischen den Gewinden in Verbindung stehen. Die Zustellung des Hauptzylinders in Bezug auf den Stößel erfolgt durch Abschalten des Motors und Zuschalten der Bremse, sobald die Kolben und Bolzen druckentlastet sind.The solution according to the invention is based on the knowledge that the adjustment function for the delivery of the fineblanking head should be integrated into existing functional elements of the head, i. an adjusting mechanism of a provided with an internal movement thread, rotatable about the stroke axis of the plunger lock nut, a frictionally mounted on an end face of the adjusting nut, arranged perpendicular to the Hubachse sprocket, held on the head hydraulic motor with drive shaft, the drive shaft of the motor and the sprocket wraps around Provide drive chain, one on the drive shaft undeliverable brake and attached to the head of the master cylinder outer movement thread. The outer movement thread of the master cylinder is guided by the inner movement thread of the adjusting nut with axial play, wherein the movement thread via a common channel for supplying and discharging the set on a locking or unlocking fluid of the hydraulic system for the purpose of axial game suspension or clearance of the game between the Threads are related. The delivery of the master cylinder with respect to the plunger is done by switching off the engine and switching on the brake as soon as the pistons and bolts are depressurized.

Von besonderer Bedeutung ist, dass die Stellmutter an einem einen Absatz aufweisenden, dem Stößel abgewandten Wandbereich des Kopfstückes axial festliegt und durch den rohrartigen Teil des Flansches entgegen der Hubbewegung des Stößels gehalten ist. Dies ermöglicht, die Anzahl der Teile und die Masse des Feinschneidkopfes zu reduzieren.Of particular importance is that the adjusting nut on a shoulder having a paragraph, facing away from the plunger wall portion of the head piece is axially fixed and held by the tubular part of the flange against the lifting movement of the plunger. This makes it possible to reduce the number of parts and the mass of the fine cutting head.

Nach einer besonders vorteilhaften Ausführungsform des erfindungsgemäßen Feinschneidkopfes ist der Kanal zum Zuführen des Fluides zu den Bewegungsgewinden durch eine Leitung mit einem Niederdruck-Hydrauliksystem über ein schaltbares Wegeventil zum Öffnen und Schließen der Leitung verbunden. Dadurch ist es möglich, die Bewegungsgewinde des Stellmechanismus in Abhängigkeit des Anliegens des Druckoder Verformungsdruckes auf den Kolben und Bolzen entsprechend zu verriegeln und bei Wegfall des Druckes die Bewegungsgewinde wieder freizugeben. Mit anderen Worten das Hydraulikfluid wird immer dann dem Hydraulikmotor zugeführt, wenn das Spiel zwischen den Bewegungsgewinden freigegeben und eine Zustellung durch den Feinschneid- oder Umformvorgang erwünscht ist.
Der auf den Stellmechanismus wirksame Verriegelungsdruck lässt sich beispielsweise durch die Vorsteuerung des Wegeventils auf einen Niederdruck von beispielsweise 65 bar einstellen.According to a particularly advantageous embodiment of the fine cutting head according to the invention, the channel for supplying the fluid to the movement threads is connected by a line to a low-pressure hydraulic system via a switchable directional control valve for opening and closing the line. This makes it possible to lock the movement thread of the adjusting mechanism in response to the concerns of the pressure or deformation pressure on the piston and bolt accordingly and release the motion thread again when the pressure is eliminated. In other words, the hydraulic fluid is supplied to the hydraulic motor whenever the clearance between the movement threads is released and delivery by the fine blanking or forming operation is desired.
The locking pressure acting on the adjusting mechanism can be adjusted to a low pressure of, for example, 65 bar, for example by the pilot control of the directional control valve.

Vorteilhaft ist ferner, dass das Kopfstück und die Stellmutter mit mindestens einem Kanal versehen ist, der in das Bewegungsgewinde zum Versorgen der Gewinde mit Schmiermittel mündet, wodurch die Leichtgängigkeit der Stellmutter gewährleistet bleibt. Im rohrartigen Teil des Flansches ist mindestens ein weiterer Kanal zum Abführen von Schmiermittel aus den Bewegungsgewinden vorgesehen, so dass eine kontinuierliche Schmierung der Bewegungsgewinde über jeweils eine mit den Kanälen verbundene, an einen Schmiermittelreservoir angeschlossene Leitung ermöglicht wird.It is also advantageous that the head piece and the adjusting nut is provided with at least one channel which opens into the movement thread for supplying the thread with lubricant, whereby the ease of movement of the adjusting nut is ensured. In the tubular part of the flange at least one further channel for discharging lubricant from the movement threads is provided, so that a continuous lubrication of the movement thread is made possible in each case via a line connected to the channels and connected to a lubricant reservoir.

Nach einer weiteren Ausgestaltung der Erfindung sind die Bewegungsgewinde von Stellmutter und Hauptzylinder als Sägegewinde ausgeführt, die eine einseitige statische Belastung beim axialen Beaufschlagen mit der unter Verriegelungsdruck stehenden Hydraulikflüssigkeit zulassen, wodurch das Bewegungsgewinde des Hauptzylinders gegen das Bewegungsgewinde der Stellmutter und letzere gegen den Absatz am Kopfstück drückt. Sämtliche Passungsspiele sind dann aufgehoben und der Stellmechanismus ist bei Anliegen des Verdränger- bzw. Arbeitsdruckes verriegelt.According to a further embodiment of the invention, the movement thread of adjusting nut and master cylinder are designed as Sägegewinde that allow a one-sided static load during axial pressurization with hydraulic fluid under lock pressure, whereby the movement thread of the master cylinder against the movement thread of the adjusting nut and latter against the heel on the head suppressed. All fit games are then canceled and the actuating mechanism is locked in case of concern the displacement or working pressure.

Eine vorteilhafte weitere Ausführungsform des erfindungsgemäßen Feinschneidkopfes sieht vor, dass der Hydraulikmotor mit einer an ein Hochdruck-Hydrauliksystem angeschlossene Zuführ- und eine Abführleitung über ein vorgesteuertes Proportionalventil verbunden ist, mit dem die Drehzahl des Motors über die Einstellung auf einen bestimmten vorwählbaren Stelldruck entsprechend regelbar ist.An advantageous further embodiment of the fine cutting head according to the invention provides that the hydraulic motor is connected to a connected to a high-pressure hydraulic system feed and a discharge via a pilot proportional valve with which the speed of the motor via the setting to a certain preselectable control pressure is controlled accordingly ,

Es hat sich als zweckmäßig erwiesen, dass die mit dem Motor in Wirkbeziehung stehende Bremse durch eine Leitung mit dem Hochdruck-Hydrauliksystem über ein schaltbares Wegeventil zum Zu- und Abschalten der Bremse verbunden ist, wodurch eine exakte lagegenaue Zustellung des erfindungsgemäßen Feinschneidkopfes ermöglicht wird.It has proven to be expedient for the brake, which is operatively connected to the engine, to be connected by a line to the high-pressure hydraulic system via a switchable directional control valve for connecting and disconnecting the brake, thereby enabling an exact positionally accurate infeed of the fineblanking head according to the invention.

In einer weiteren bevorzugten Ausführungsform der Erfindung ist die Antriebskette eine Hohlbolzenkette, die zweckmäßigerweise in den Zahnkranz auf der Stellmutter eingreift, wobei dem Zahnkranz mindestens einen weiterer Zahnkranz zugeordnet sein kann, dessen Drehachse parallel versetzt zum Zahnkranz der Stellmutter auf einer an am Kopfstück abgestützten Platte angeordnet ist. Die Zahnkränze liegen horizontal fluchtend zueinander in einer Ebene, so dass ein torsionsfreier Antrieb der Hohlbolzenkette sichergestellt ist.In a further preferred embodiment of the Invention, the drive chain is a hollow bolt chain, which engages expediently in the ring gear on the adjusting nut, wherein the sprocket can be associated with at least one further sprocket whose axis of rotation is arranged offset parallel to the sprocket of the adjusting nut on a supported on the head plate. The sprockets lie horizontally in alignment with each other in a plane, so that a torsion-free drive of the hollow bolt chain is ensured.

Nach einer weiteren bevorzugten Ausführungsform des erfindungsgemäßen Feinschneidkopfes ist an der dem Stößel zugewandten Halteplatte ein Tasttisch angeordnet, der durch im rohrförmigen Teil des Flansches achsparallel zur Hubachse in Bohrungen des rohrartigen Teils geführte Sicherungsbolzen verdrehsicher angeordnet ist.According to a further preferred embodiment of the fine blanking head according to the invention, a keypad is arranged on the plunger facing the holding plate, which is arranged against rotation in the tubular part of the flange axially parallel to the lifting axis guided in holes of the tubular part securing bolt.

Eine insbesondere für Feinschneidvorgänge bevorzugte Ausgestaltung des erfindungsgemäßen Feinschneidkopfes sieht vor, dass im Hauptzylinder ein Ringzackenkolben zum Andrücken der Ringzacke in ein zu bearbeitendes Werkstück, mehrere den Ringzackenkolben koaxial abstützende Ringzackenbolzen und ein Tastkolben zum Erfassen eines zwischen der Halteplatte und dem Tasttisch vorgesehenen Hubweges zueinander auf der Hubachse liegend aufgenommen sind.An embodiment of the fine blanking head according to the invention which is particularly preferred for fineblanking processes provides for a ring-toothed piston for pressing the ring-toothed tooth into a workpiece to be machined, a plurality of ring-toothed pins coaxially supporting the ring-toothed piston and a feeler piston for detecting a stroke path provided between the holding plate and the keypad relative to one another Hubachse lying are added.

In weiterer Ausgestaltung des erfindungsgemäßen Feinschneidkopfes ist in der Halteplatte eine die Ringzackenbolzen koaxial zur Hubachse abstützende Druckplatte angeordnet ist, in welche eine Mittelabstützung in Flucht der Hubachse vorgesehen ist, wobei die Druckplatte von einem Haltering am Tasttisch gehalten ist.In a further embodiment of the fine blanking head according to the invention in the holding plate a the serrated pin coaxial with the lifting axis supporting pressure plate is arranged, in which a center support is provided in alignment of the lifting axis, wherein the Pressure plate is held by a retaining ring on the keypad.

Die Aufgabe der Erfindung wird des Weiteren durch ein Verfahren mit folgenden Schritten gelöst:

  • a Verriegeln eines aus Bewegungsgewinden einer im Kopfstück des Feinschneidkopfes um die Hubachse drehbaren Stellmutter und einem Hauptzylinder zusammengesetzten Stellmechanismus während des Aufbringens der Druck- und Verformungskraft durch permanentes axiales Zuführen des auf einen Verriegelungsdruck eingestellten Fluides über einen zum Stellmechanismus führenden Kanal zwecks Aufhebung eines axialen Spiels zwischen den Bewegungsgewinden,
  • b Entriegeln der beiden Bewegungsgewinde nach Beendigung des Aufbringens der Druck- und Verformungskraft durch Abschalten des Verriegelungsdruckes mittels Absperren des Kanals,
  • c Zuführen eines auf einen Stelldruck eingestellten Fluides zu einem hydraulischen Motor zum Betätigen des Stellmechanismus durch Drehen eines an der Stellmutter festgelegten Zahnkranzes über eine vom Motor angetriebene Kette bis der Hauptzylinder seine Position in Bezug auf eine vorbestimmte Zustelllage erreicht hat,
  • d Abschalten des Motors durch Absperren der Zufuhr des auf Antriebsdruck eingestellten Fluides und Zuschalten des vom Stelldruck auf einen Bremsdruck eingestellten Fluides zum Festhalten der eingestellten Position des Feinschneidkopfes sowie
  • e erneutes Zuschalten des Verriegelungsdruckes auf den Stellmechanismus zum Verriegeln der Bewegungsgewinde gemäß Schritt a.
The object of the invention is further solved by a method comprising the following steps:
  • a Locking one of movement threads of a fine cutting head in the head of the fine cutting head about the lifting axis adjusting nut and a master cylinder composed adjusting mechanism during application of the compressive and deforming force by permanently axial supply of the set on a locking fluid over a channel leading to the actuating mechanism for the purpose of repealing an axial clearance between the motion threads,
  • b unlocking the two movement threads after completion of the application of the pressure and deformation force by switching off the locking pressure by shutting off the channel,
  • c supplying a pilot pressure fluid to a hydraulic motor to actuate the actuator mechanism by rotating a ring gear fixed to the actuator nut through a chain driven by the motor until the master cylinder has reached its position with respect to a predetermined infeed position,
  • d Shut down the motor by shutting off the supply of the fluid set to drive pressure and switching it from the signal pressure to a brake pressure adjusted fluid for holding the set position of the fine cutting head and
  • e renewed connection of the locking pressure on the adjusting mechanism for locking the movement thread according to step a.

Der erfindungsgemäße Feinschneidkopf ist nicht nur für mechanisch angetriebene Pressen, sondern auch für hydraulische Pressen geeignet. Durch die Integration der Verstellmittel in den Feinschneidkopf gelingt es, das Axialspiel zwischen den Verstellelementen während des Schneidbetriebs sicher zu verhindern, eine hohe Zustell- und Wiederholgenauigkeit unter gleichzeitiger Verbesserung der Betriebssicherheit im Dauerbetrieb zu gewährleisten.The fine blanking head according to the invention is suitable not only for mechanically driven presses but also for hydraulic presses. By integrating the adjustment in the fine blanking succeeds to prevent the axial clearance between the adjusting elements during cutting safely, to ensure a high delivery and repeat accuracy while improving the reliability in continuous operation.

Weitere Vorteile und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung unter Bezugnahme auf die beigefügten Zeichnungen.Further advantages and details of the invention will become apparent from the following description with reference to the accompanying drawings.

Ausführungsbeispielembodiment

Die Erfindung soll nachstehend an einem Ausführungsbeispiel näher erläutert werden.The invention will be explained in more detail below using an exemplary embodiment.

Es zeigtIt shows

Fig. 1 eine perspektivische Darstellung der Presse mit im Kopfstück der Presse montiertem erfindungsgemäßen Feinschneidkopf, Fig. 1 a perspective view of the press with mounted in the head of the press fine cutting head according to the invention,

Fig. 2 einen Schnitt des erfindungsgemäßen Feinschneidkopfes im eingefahrenen Zustand, Fig. 2 a section of the invention Fine cutting head in retracted state,

Fig. 3 einen Schnitt des erfindungsgemäßen Feinschneidkopfes im ausgefahrenen Zustand, Fig. 3 a section of the fine cutting head according to the invention in the extended state,

Fig. 4 eine Draufsicht der Fig. 1 im ausgefahrenen Zustand des erfindungsgemäßen Feinschneidkopfes, Fig. 4 a top view of Fig. 1 in the extended state of the fine cutting head according to the invention,

Fig. 5 eine Darstellung des Kanales zum Zuführen von Hydraulikfluid in die Bewegungsgewinde des Stellmechanismus als Schnitt A-A der Fig. 4 Fig. 5 a representation of the channel for supplying hydraulic fluid into the movement thread of the adjusting mechanism as a section AA of Fig. 4

Fig. 6 eine perspektivische Darstellung des Stellmechanismus mit Hydraulikmotor und Hohlbolzenkette Fig. 6 a perspective view of the actuating mechanism with hydraulic motor and hollow pin chain

Fig. 7 eine Draufsicht auf den Hydraulikmotor mit Zahnkränzen und Fig. 7 a plan view of the hydraulic motor with sprockets and

Fig. 8 ein hydraulisches Schaltschema der Kpfverstellung. Fig. 8 a hydraulic circuit diagram of Kpfverstellung.

Die Fig. 1 zeigt in perspektivischer Darstellung einer mechanisch angetriebenen Feinschneidpresse der Kniehebelbauart. Der eine Tischplatte tragende Stößel 1 dieser Presse führt eine Hubbewegung in Richtung Hubachse HU und in Richtung Kopfstück 2 der Presse aus. Im Kopfstück 2 der Presse ist der erfindungsgemäße Feinschneidkopf 3 in Flucht zur Hubachse HU angeordnet.The Fig. 1 shows a perspective view of a mechanically operated fineblanking press of the toggle lever design. The ram 1 of this press carrying a table top carries out a lifting movement in the direction of the lifting axis HU and in the direction of the head piece 2 of the press. In the head piece 2 of the press, the fine cutting head 3 according to the invention is arranged in alignment with the stroke axis HU.

Die Fig. 2 zeigt den erfindungsgemäßen Feinschneidkopf 3 in Schnittdarstellung. Der Feinschneidkopf 3 ist als kompakte Baueinheit in einer Aufnahme im Kopfstück 2 eingesetzt und dort formschlüssig fixiert. Der erfindungsgemäße Feinschneidkopf 3 umfasst einen aus Stellmutter 6, Zahnkranz 7, Hydraulikmotor 8, Drehgeber 4, Antriebskette 9 und Hauptzylinder 10 zusammengesetzten Stellmechanismus 11 (siehe Fig. 6). Die um die Hubachse HU drehbare Stellmutter 6 und der entlang der Hubachse HU verschiebbare Hauptzylinder 10 sind mit Bewegungsgewinden 12 und 13 in Form von aufeinander im Flankenwinkel abgestimmten Sägegewinden versehen, die miteinander koaxial zur Hubachse HU im Eingriff sind, so dass bei Drehung der Stellmutter 6 der Hauptzylinder 10 von einer eingefahrenen in eine ausgefahrene Position (siehe Fig.3) in Bezug auf den Stößel 1 bringbar ist. Mit anderen Worten der Hauptzylinder ist zum Stößel 1 in seiner Höhe einstellbar.The Fig. 2 shows the fine cutting head 3 according to the invention in a sectional view. The fine cutting head 3 is used as a compact unit in a receptacle in the head piece 2 and fixed there in a form-fitting manner. The fine cutting head 3 according to the invention comprises an adjusting nut 6, ring gear 7, hydraulic motor 8, rotary encoder 4, drive chain 9 and master cylinder 10 assembled actuating mechanism 11 (see Fig. 6 ). The rotatable about the stroke axis HU adjusting nut 6 and along the lifting axis HU displaceable master cylinder 10 are provided with movement threads 12 and 13 in the form of mutually matched in the flank angle sawing, which are coaxial with the stroke axis HU engaged, so that upon rotation of the adjusting nut. 6 the master cylinder 10 from a retracted to an extended position (see Figure 3 ) in relation to the plunger 1 can be brought. In other words, the master cylinder is adjustable to the plunger 1 in height.

Das Kopfstück 2 weist einen in Richtung Hubachse HU vorspringenden stufenartigen Absatz 15 auf, der kopfseitig und stößelabgewandt an der Innenwand 14 des Kopfstückes 2 ausgebildet ist. An diesem Absatz 15 stützt sich axial die Stellmutter 6 ab, deren Außenkontur an den stufenartigen Absatz 15 angepasst ist. Die nach unten, d.h. in Richtung Stößel 1 liegende Stirnseite 16 der Stellmutter 6 lagert auf der Stirnseite 17 eines in das Kopfstück 2 eingeführten rohrartigen Teils 18 eines Flansches 19 auf, wodurch die Stellmutter 6 sowohl stößelabgewandt als auch stößelzugewandt axial gesichert ist.The head piece 2 has a step-like shoulder 15 projecting in the direction of the lifting axis HU, which is formed on the inner wall 14 of the head piece 2 on the head side and away from the plunger. At this paragraph 15 axially supports the adjusting nut 6, whose outer contour is adapted to the step-like shoulder 15. The down, i.e. lying in the direction of ram 1 end face 16 of the adjusting nut 6 superimposed on the end face 17 of an inserted into the head piece 2 tubular member 18 of a flange 19, whereby the adjusting nut 6 is both axially away from ram and tappet facing.

Der Bund 20 des Flansches 19 ist wie Fig. 3 zeigt auf der stößelzugewandten Seite durch Schraubverbindungen 21 stirnseitig am Kopfstück 2 befestigt.
In den Bund 20 des Flansches 19 sind zwei diametral gegenüber liegende Bohrungen 22 vorgesehen, die parallel zur Hubachse HU in das Innere des rohrartigen Teils 18 eingebracht sind. Diese Bohrungen 22 dienen zur Aufnahme von bolzenartigen Verdrehsicherungen 23, die eine den Hauptzylinder 10 verschließende Hauptplatte 24 axial führen. Die Stirnseite 25 der Verdrehsicherungen 23 ist durch eine Verschraubung fixiert.The collar 20 of the flange 19 is like Fig. 3 shows fixed on the ram-facing side by screw 21 frontally on the head piece 2.
In the collar 20 of the flange 19 are two diametrically opposite lying bores 22 are provided, which are introduced parallel to the lifting axis HU in the interior of the tubular part 18. These bores 22 serve to receive bolt-like anti-rotation devices 23 which axially guide a main plate 24 closing the main cylinder 10. The end 25 of the anti-rotation 23 is fixed by a screw.

Im Hauptzylinder 10 sind ein Ringzackenkolben 27 und ein Tastkolben 28 axial zueinander fluchtend aufgenommen. Der Ringzackenkolben 27 befindet sich im mechanischen Anschlag mit dem Hauptzylinder 10. Der Tastkolben 28 wird hydraulisch in Formschluss mit dem Ringzackenbolzen 27 gebracht. Die Ringzackenbolzen 29 durchgreifen die Hauptplatte 24 und lagern auf einer Ringzackendruckplatte 30 auf, die von einem am Tasttisch 26 befestigten Ringzackenhaltering 31 gesichert ist. An der Hauptplatte 24 wird die Mittelabstützung 32 gehalten, die das Werkzeug während der Technologiephase abstützt.In the master cylinder 10, a serrated piston 27 and a Tastkolben 28 are received axially aligned with each other. The serrated piston 27 is in mechanical abutment with the master cylinder 10. The sensing piston 28 is hydraulically brought into positive connection with the serration pin 27. The serrated pins 29 pass through the main plate 24 and are mounted on a serrated pressure plate 30 which is secured by a ring-holder ring 31 fixed to the scanning table 26. On the main plate 24, the center support 32 is held, which supports the tool during the technology phase.

Der Hauptzylinder 10 ist kopfseitig mit einem Ringzackendeckel 33 druckdicht verschlossen. An der oberen Stirnseite 34 der Stellmutter 6 ist der Zahnkranz 7 kraftschlüssig befestigt, der über die Antriebskette 9, beispielsweise Hohlbolzenkette, und den hydraulischen Motor 8 die Stellmutter 6 um ihre mit der Hubachse HU zusammenfallende Achse dreht. Der Aufbau dieses Antriebs wird in Abschnitt [0043] beschrieben.The master cylinder 10 is closed pressure-tight on the head side with a ring-toothed cover 33. At the upper end face 34 of the adjusting nut 6 of the ring gear 7 is fixed non-positively, which rotates about the drive chain 9, for example, hollow pin chain, and the hydraulic motor 8, the adjusting nut 6 about their coincidence with the stroke axis HU axis. The structure of this drive is described in section [0043].

Der rohrartige Teil 18 des Flansches 19 besitzt an seiner der Hubachse HU zugewandten Innenwand 38 einen in Richtung Hubachse HU vorspringenden stufenartigen oberen Absatz 39 und einen weiteren unterhalb des Absatzes 39 angeordneten in Richtung Hubachse HU vorspringenden Absatz 40. Der obere Absatz 39 hat dabei gegenüber dem Absatz 40 eine deutlich größere Absatzhöhe H, so dass die Innenwand 38 des rohrartigen Teils 18 in zwei gegeneinander höhenversetzte axiale Stützflächen M1 und M2 zum gleitverschieblichen Abstützen eines entsprechend ausgebildeten Hauptzylinders 10 aufgeteilt ist.The tubular part 18 of the flange 19 has on its the Hubachse HU facing inner wall 38 in the direction of lifting axis HU projecting step-like upper Paragraph 39 and another arranged below the paragraph 39 in the direction of lifting axis HU protruding paragraph 40. The upper paragraph 39 has compared to the paragraph 40 a significantly larger heel height H, so that the inner wall 38 of the tubular member 18 in two mutually staggered axial support surfaces M1 and M2 is split for slidably supporting a correspondingly formed master cylinder 10.

Das äußere Bewegungsgewinde 13 am Kopf 41 des Hauptzylinders 10 erstreckt sich über die gesamte Länge des inneren Bewegungsgewindes 12 der Stellmutter 6, wobei das äußere Bewegungsgewindes 13 am Kopf 41 des Hauptzylinders 10 an einem oberen in Richtung Hubachse HU zurückversetzten Absatz 43 der Außenwand 42 des Hauptzylinders 10 endet. Die Außenwand 42 besitzt einen weiteren gegenüber dem Bewegungsgewinde 13 in Richtung Hubachse HU zurückversetzten unteren Absatz 44, so dass an der Außenwand 42 des Hauptzylinders 10 zwei zueinander höhenversetzte Stützflächen M3 und M4 zum gleitverschieblichen Abstützen an den Mantelflächen M1 und M2 des rohrartigen Teils 18 entstehen.The outer movement thread 13 on the head 41 of the master cylinder 10 extends over the entire length of the inner movement thread 12 of the adjusting nut 6, wherein the outer movement thread 13 on the head 41 of the master cylinder 10 at an upper in the direction of lifting axis HU recessed paragraph 43 of the outer wall 42 of the master cylinder 10 ends. The outer wall 42 has a further lower shoulder 44 offset from the movement thread 13 in the direction of the lifting axis HU, so that two mutually offset support surfaces M3 and M4 for slidably supporting on the lateral surfaces M1 and M2 of the tubular part 18 are formed on the outer wall 42 of the master cylinder 10.

Die Bewegungsgewinde 12 und 13 des Stellmechanismus 11 sind -wie Fig. 2 zeigt- eingefahren, so dass unterhalb der Bewegungsgewinde 12 und 13 ein Freiraum 45 entsteht, der von dem oberen Absatz 39 des rohrartigen Teils 18, dem Bewegungsgewinde 13 zugeordneten oberen Absatz 43 an der Außenwand 42 des Hauptzylinders 10 und den entsprechenden Bereichen von Innenwand 38 bzw. Außenwand 42 begrenzt ist. Dieser Freiraum 45 ist über einen Kanal 46 in der Wandung der rohrartigen Teils 18 und einen Kanal 47 in der Wandung des Kopfstückes 2 an eine Leitung 48 zum Ableiten von Schmiermittel in ein Reservoir eines nicht weiter dargestellten Schmiersystems angeschlossen. Oberhalb der Kanäle 46 und 47 ist ein weiterer Kanal 49 durch die Wandung des Kopfstückes 2 und ein Kanal 50 durch die Wandung der Stellmutter 6 geführt, wobei der Kanal 50 in das Bewegungsgewinde 12 der Stellmutter 6 zum Zuführen von Schmiermittel mündet. Der Kanal 49 ist an eine Leitung 51 angeschlossen, in der über eine Pumpe Schmiermittel in die Bewegungsgewinde 12 und 13 zuführbar ist.The movement threads 12 and 13 of the adjusting mechanism 11 are -as Fig. 2 retracted, so that below the movement threads 12 and 13, a clearance 45 is formed by the upper shoulder 39 of the tubular part 18, the movement thread 13 associated upper shoulder 43 on the outer wall 42 of the master cylinder 10 and the corresponding areas of the inner wall 38 and Outside wall 42 is limited. This space 45 is via a channel 46 in the wall of the tubular part 18 and a channel 47 in the wall of the Head piece 2 is connected to a line 48 for discharging lubricant in a reservoir of a lubrication system not shown. Above the channels 46 and 47, a further channel 49 is guided through the wall of the head piece 2 and a channel 50 through the wall of the adjusting nut 6, wherein the channel 50 opens into the movement thread 12 of the adjusting nut 6 for supplying lubricant. The channel 49 is connected to a line 51, in which via a pump lubricant in the motion thread 12 and 13 can be fed.

Der Hauptzylinder 10 stützt sich mit seinen axialen Stützflächen M3 und M4 an den axialen Stützenflächen M1 und M2 des rohrförmigen Teils 18 ab. Zwischen dem unteren Absatz 44 der Außenwand 42 des Hauptzylinders 10 und dem unteren Absatz 40 der Innenwand 38 des rohrartigen Teils 18 entsteht ein axial verlaufender schmaler Freiraum 52. In den Freiraum 52 führt ein Zuführkanal 54, der über eine Zuführleitung 61 mit einer Druckleitung 53 eines Niederdruck-Hydrauliksystems verbunden ist. Der Zuführkanal 54 durchdringt dabei die Wand des Ko 5 und die Wand des rohrartigen Teils 18. Die Druckleitung 53 ist an ein Hydrauliksystem über ein Wegeventil 55 (siehe Fig. 8) angeschlossen, das den Druck des Hydrauliksystems auf eine hinreichende Größenordnung zum Verriegeln der Bewegungsgewinde 12 und 13 reduziert.The main cylinder 10 is supported with its axial support surfaces M3 and M4 on the axial support surfaces M1 and M2 of the tubular member 18 from. Between the lower shoulder 44 of the outer wall 42 of the master cylinder 10 and the lower shoulder 40 of the inner wall 38 of the tubular member 18 is formed an axially extending narrow space 52. In the free space 52, a feed channel 54 which leads via a feed line 61 to a pressure line 53 of a Low-pressure hydraulic system is connected. The feed channel 54 penetrates the wall of the Ko 5 and the wall of the tubular part 18. The pressure line 53 is connected to a hydraulic system via a directional control valve 55 (see Fig. 8 ), which reduces the pressure of the hydraulic system to a sufficient magnitude for locking the movement threads 12 and 13.

In Fig. 3 ist der erfindungsgemäße Feinschneidkopf 3 im ausgefahrenden Zustand der Bewegungsgewinde 12 und 13 gezeigt. Der Hauptzylinder 10 hat sich durch die Drehung der Stellmutter 6 mit seinem oberen Absatz 43 an der Außenwand 42 bis zum oberen Absatz 39 an der Innenwand 38 des rohrartigen Teils 18 bewegt und wird in einem definierten Abstand zum Absatz 39 gehalten. Die maximale Zustellhöhe des Feinschneidkopfes 3 in bezug auf den Stößel 1 der Presse wird mittels eines Drehgebers 4 am Hydraulikmotor 8 bestimmt. Der Hauptzylinder 10 hat dann die Feinschneidplatte 24 zusammen mit dem Tasttisch 26 um einen entsprechenden Betrag zum Stößel 1 hin verstellt.In Fig. 3 the fine cutting head 3 according to the invention is shown in the extended state of the movement thread 12 and 13. The master cylinder 10 has moved by the rotation of the adjusting nut 6 with its upper shoulder 43 on the outer wall 42 to the upper shoulder 39 on the inner wall 38 of the tubular member 18 and is at a defined distance from Paragraph 39 held. The maximum infeed height of the fine cutting head 3 with respect to the plunger 1 of the press is determined by means of a rotary encoder 4 on the hydraulic motor 8. The master cylinder 10 has then adjusted the fine blanking plate 24 together with the keypad 26 by a corresponding amount to the plunger 1 out.

Die Fig. 4 und 5 verdeutlichen die Lage des Zuführkanals 56. Über den Freiraum 52 werden die Flächen 40 und 44 hydraulisch in entgegengesetzter Richtung gedrückt, so dass der vom Wegeventil 55 eingestellte Verriegelungsdruck der Hydraulikflüssigkeit das Bewegungsgewinde 13 des Hauptzylinders 10 gegen das Bewegungsgewinde 12 der Stellmutter 6 drücken kann, was zur Verriegelung der Bewegungsgewinde führt.The Fig. 4 and 5 illustrate the location of the feed channel 56. Via the space 52, the surfaces 40 and 44 are hydraulically pressed in the opposite direction, so that set by the directional control valve 55 locking pressure of the hydraulic fluid can push the movement thread 13 of the master cylinder 10 against the movement thread 12 of the adjusting nut 6, which leads to the locking of the movement thread.

Die Fig. 6 und 7 zeigen den Stellmechanismus am Kopf des erfindungsgemäßen Feinschneidkopfes mit am Kopfstück 2 festgelegten Hydraulikmotor 8, Antriebskette 9, beispielsweise Hohlbolzenkette, und den Drehgeber 4. Auf einer Platte 57, die in der Ebene des auf der Stirnseite 34 der Stellmutter 6 liegenden Zahnkranzes 7 im Kopfstück 2 der Presse angeordnet ist, sind zwei Zahnkränze 35 nebeneinander angeordnet um zueinander parallel liegende Achsen B drehbar gelagert. Die
Antriebskette 9 umschlingt die Zahnkränze 7 und 35 torsionsfrei.
Der Hydraulikmotor 8 ist über eine Zuführleitung 62 und einem Proportionalventil 37 mit dem unter Hochdruck stehenden Hydrauliksystem verbunden. Eine Abführleitung 58 verbindet den hydraulischen Motor 8 über das Proportionalventil 37 mit einer Tankleitung 53. Auf der Achse des Zahnkranzes 35 wirkt eine Bremse 59, die mit einer Zuführleitung 60 über das Wegeventil 55 mit dem Hydrauliksystem verbunden ist.The Fig. 6 and 7 show the adjusting mechanism at the head of the fine cutting head according to the invention with the hydraulic motor 8 fixed to the head 2, drive chain 9, for example, hollow pin chain, and the encoder 4. On a plate 57 in the plane of lying on the front side 34 of the adjusting nut 6 ring gear 7 in the head piece. 2 The press is arranged, two sprockets 35 are arranged side by side about mutually parallel axes B rotatably mounted. The
Drive chain 9 wraps around the sprockets 7 and 35 torsion.
The hydraulic motor 8 is connected via a supply line 62 and a proportional valve 37 to the high-pressure hydraulic system. A discharge line 58 connects the hydraulic motor 8 via the proportional valve 37 with a tank line 53. Acts on the axis of the ring gear 35 a brake 59, which is connected to a supply line 60 via the directional control valve 55 to the hydraulic system.

Der Ablauf des erfindungsgemäßen Verfahrens wird unter Bezug auf die Fig. 8 näher erläutert.
Das Hydrauliksystem besteht aus einer Druckleitung 62, die von einer nicht dargestellten Druckquelle auf einen Druck von 65 bar gespannt ist, und der Tankleitung 53.
Die Druckleitung 62 führt über das Proportionalventil 37 zum hydraulischen Motor 8. Das Proportionalventil 37 ist auf einen voreinstellbaren Solldruck vorgesteuert und regelt den anliegenden Druck der hydraulischen Flüssigkeit auf einen Stelldruck in Bereich von 0 bis 250 bar, vorzugsweise auf 220 bar für die Stellmutter 6 ein. Das Proportionalventil 37 ist als 4/3-Wegeventil mit Sperr-Mittelstellung ausgeführt, so dass der hydraulische Motor 8 immer dann aus der Sperrfunktion in die Offenfunktion umschaltbar ist, wenn die nachfolgend näher beschriebene Verriegelung der Bewegungsgewinde 12 und 13 aufgehoben und eine erneute Zustellung des erfindungsgemäßen Feinschneidkopfes 3 in Bezug auf den Stößel 1 vorgenommen werden soll.
Sobald die vorbestimmte Position der Zustellung des erfindungsgemäßen Feinschneidkopfes 3 erreicht ist, schaltet das Proportionalventil 37 wieder in die Schließstellung und die Bremse 59 hält somit die neue Position fest. Das geschieht durch das Öffnen des Wegeventils 55, das die Bremse 59 betätigt.The sequence of the method according to the invention will be described with reference to FIGS Fig. 8 explained in more detail.
The hydraulic system consists of a pressure line 62, which is stretched by a pressure source, not shown, to a pressure of 65 bar, and the tank line 53rd
The proportional line 37 is pilot-controlled to a presettable target pressure and regulates the applied pressure of the hydraulic fluid to a setting pressure in the range of 0 to 250 bar, preferably 220 bar for the adjusting nut 6 a , The proportional valve 37 is designed as a 4/3-way valve with locking middle position, so that the hydraulic motor 8 is always switched from the blocking function in the open function when the locking of the movement thread 12 and 13 described in more detail below and repositioned the fine cutting head 3 according to the invention with respect to the plunger 1 to be made.
Once the predetermined position of the delivery of the fine cutting head 3 according to the invention is reached, the proportional valve 37 switches back into the closed position and the brake 59 thus holds the new position. This is done by opening the directional control valve 55, which operates the brake 59.

Von der Druckleitung 60 des Hydrauliksystems zweigt die Zuführleitung 53 ab, die die Hydraulikflüssigkeit über das Wegeventil 55 durch die Kanäle 54 in der Wand des Flansches 19 und des rohrartigen Teils 18 über den Kanal 56 in den Freiraum 52 leitet, der das Hydraulikfluid dem Stellmechanismus 11 zuführt. Das Wegeventil 55 lässt das Hydraulikfluid passieren, so dass ein sicheres Verriegeln der Bewegungsgewinde 12 und 13 gewährleistet ist. Während des Anliegens des Ringzacken- und/oder Umformdruckes bleiben die Bewegungsgewinde verriegelt, so dass eine Verstellung der Zustellhöhe des Feinschneidkopfes 3 in Bezug auf den Stößel nicht möglich ist.From the pressure line 60 of the hydraulic system, the supply line 53 branches off, the hydraulic fluid via the directional control valve 55 through the channels 54 in the wall of the flange 19 and the tubular member 18 via the channel 56th into the free space 52, which supplies the hydraulic fluid to the actuating mechanism 11. The directional control valve 55 allows the hydraulic fluid to pass, so that a secure locking of the movement thread 12 and 13 is ensured. During the concern of the Ringzacken- and / or forming pressure, the motion thread remain locked, so that an adjustment of the feed height of the fine cutting head 3 with respect to the plunger is not possible.

Das erfindungsgemäße Verfahren läuft wie folgt ab: Das Bewegungsgewinde 12 der Gewindemutter 6 und das Bewegungsgewinde 13 des Hauptzylinders 10 werden während des Aufbringens der Druck- und Verformungskraft durch ein permanentes Zuführen eines auf Verriegelungsdruck eingestellten Fluides in axialer Richtung hydraulisch verriegelt.
Die beiden Bewegungsgewinde werden nach Beendigung des Aufbringens der Druck- und Verformungskraft durch ein Abschalten bzw. Absperren der Hydraulikflüssigkeit entriegelt, so dass die Bewegungsgewinde des Stellmechanismus ein Bewegungsspiel aufweisen.
Sobald die Bewegungsfreiheit eines der Bewegungsgewinde, d.h. der des Hauptzylinders vorliegt, wird ein hydraulischer Motor 8 in Betrieb gesetzt, der über einen Zahnkranz 7 und eine Antriebskette 9, das Bewegungsgewinde 12 der Stellmutter 6 solange dreht bis der Hauptzylinder 10 seine vorbestimmte Lage in Bezug auf den Stößel 1 mittels dem Drehgeber 4 erreicht hat.
Der hydraulische Motor 8 wird durch Absperren der Hydraulikflüssigkeit abgeschaltet und die Antriebswelle des Motors 8 mit der Bremse 59 zum Stillstand gebracht. Der Verriegelungsdruck für die Bewegungsgewinde 12 und 13 wird erneut zugeschaltet, so dass beim Anliegen des Rangzackenund/oder Umformdrucks die Bewegungsgewinde auf der Kraftkennlinie vollkommen spielfrei sind.The process according to the invention proceeds as follows: The movement thread 12 of the threaded nut 6 and the movement thread 13 of the master cylinder 10 are hydraulically locked in the axial direction during the application of the compressive and deforming force by a permanent supply of a fluid adjusted to locking pressure.
The two movement threads are unlocked after completion of the application of the pressure and deformation force by switching off or shutting off the hydraulic fluid, so that the movement thread of the adjusting mechanism have a movement play.
Once the freedom of movement of one of the motion thread, ie that of the master cylinder is present, a hydraulic motor 8 is set in operation, the sprocket 7 and a drive chain 9, the movement thread 12 of the adjusting nut 6 rotates until the master cylinder 10 its predetermined position with respect to has reached the plunger 1 by means of the encoder 4.
The hydraulic motor 8 is switched off by shutting off the hydraulic fluid and brought the drive shaft of the motor 8 with the brake 59 to a standstill. The locking pressure for the movement threads 12 and 13 is switched on again, so that when concerns the Rangkackenund / or forming the movement thread on the force curve are completely free of play.

Bezugszeichenliste

Stößel
1
Kopfstück der Presse
2
Feinschneidkopf
3
Drehgeber an 8
4
Stellmutter
6
Zahnkranz
7
Hydraulikmotor
8
Antriebskette
9
Hauptzylinder
10
Stellmechanismus
11
Bewegungsgewinde der Stellmutter
12
Bewegungsgewinde am Hauptzylinder
13
Innenwand des Kopfstückes
14
Stufenartiger Absatz an 14
15
Stirnseite von 6
16
Stirnseite von 18
17
Rohrartiger Teil von 19
18
Flansch
19
Bund von 19
20
Schraubverbindungen
21
Bohrungen in 19
22
Verdrehsicherungen
23
Hauptplatte
24
Stirnseite von 23
25
Tasttisch
26
Ringzackenkolben
27
Tastkolben
28
Ringzackenbolzen
29
Ringzackendruckplatte
30
Ringzackenhaltering
31
Mittelabstützung
32
Ringzackendeckel
33
Obere Stirnseite der Stellmutter 6
34
Weitere Zahnkränze
35
Proportionalventil
37
Innenwand von 18
38
Stufenartiger oberer Absatz der Innenwand
39
Stufenartiger unterer Absatz der Innenwand
40
Kopf des Hauptzylinders 10
41
Außenwand des Hauptzylinders 10
42
Oberer Absatz der Außenwand 42
43
Unterer Absatz der Außenwand 42
44
Freiraum
45
Kanal in der Wand des rohrartigen Teil 18
46
Kanal in der Wand des Kopftsückes
47
Leitung zum Ableiten von Schmiermittel
48
Kanäle zur Schmierung
49, 50
Leitung für Kanal 49
51
Freiraum
52
Tankleitung bzw. Zuführleitung
53
Zuführkanal zum Freiraum 52
54
Wegeventil
55
Kanal zum Bewegungsgewinde
56
Platte
57
Abführleitung
58
Bremse
59
Zuführleitung für Bremse
60
Zuführleitung
61
Druckleitung des hochdruckseitigen Hydrauliksystems und Zuführleitung für Motor
62
Höhe des Absatzes von 39
H
Hubachse von 1
HU
Axiale Stützflächen
M1-M4
LIST OF REFERENCE NUMBERS
tappet
1
Headpiece of the press
2
Fine Cutting Head
3
Encoder at 8
4
adjusting nut
6
sprocket
7
hydraulic motor
8th
drive chain
9
master cylinder
10
mechanism
11
Movement thread of the adjusting nut
12
Movement thread on the master cylinder
13
Inner wall of the head piece
14
Stepped paragraph on 14
15
Front side of 6
16
Front side of 18
17
Pipe-like part of 19
18
flange
19
League of 19
20
screw
21
Holes in 19
22
anti-rotation
23
master disk
24
Front side of 23
25
touch table
26
V-shaped projection piston
27
touch piston
28
Shaped projection pins
29
V-shaped projection pressure plate
30
Edged ring retaining ring
31
center support
32
V-shaped projection cover
33
Upper end of the adjusting nut 6
34
Other sprockets
35
proportional valve
37
Inside wall of 18
38
Step-like upper heel of the inner wall
39
Step-like lower heel of the inner wall
40
Head of the master cylinder 10
41
Outer wall of the master cylinder 10
42
Upper heel of the outer wall 42
43
Lower heel of the outer wall 42
44
free space
45
Channel in the wall of the tubular part 18
46
Canal in the wall of the Bold
47
Line for draining lubricant
48
Channels for lubrication
49, 50
Cable for channel 49
51
free space
52
Tank line or supply line
53
Supply channel to the free space 52
54
way valve
55
Channel to the movement thread
56
plate
57
discharge
58
brake
59
Supply line for brake
60
feed
61
Pressure line of high-pressure side hydraulic system and supply line for motor
62
Height of the paragraph of 39
H
Lifting axle of 1
HU
Axial support surfaces
M1-M4

Claims (15)

  1. Hydraulic fine blanking head for a mechanical press, especially a fine blanking press, which is supported by a head piece (2) mounted on a machine frame of the press above a ram (1) supporting a table top and executing a stroke movement in axial alignment to its stroke axis (HU), with a inserted into the head piece (2) tube-like designed part (18) of a flange (19) the shoulder (20) of which is fixed rigid to torsion by screwed connections (21) at the side of the head piece (2) facing the ram, with a concentrically pushed into the tube-like part (18) main cylinder (10), with positioned inside the main cylinder (10) pistons (27, 28) and pins (29), wherein the main cylinder (10) is pressure tight closed with a cover (33) or a retaining plate (24), and a hydraulic system for feeding the main cylinder (10) with a adjusted to a desired pressure fluid, characterized in that an adjusting mechanism (11) consisting of an adjusting nut (6) provided with an internal motion thread (12), turnable around the stroke axis (HU), a sprocket wheel (7) non-positively fixed at one frontal surface (34) of the adjusting nut (6) vertically arranged to the stroke axis (HU), a hold at the head piece (2) hydraulic motor (8) with motor shaft, a driving chain (9) running around the shaft of the motor (8) and the sprocket wheel (7), a brake (59) feedable to the motor shaft and an external motion thread (13) provided at the head (41) of the main cylinder (10) guided with axial backlash by the internal motion thread (12) of the adjusting nut (6), wherein the motion threads (12, 13) are connected via a conduit (56) for feeding fluid of the hydraulic system adjusted to a locking respectively unlocking pressure for blocking respectively unblocking the axial backlash between the threads and that the infeed of the main cylinder (10) with regard to the ram (1) is adjustable by switching on and off the motor (8) and the brake (59).
  2. Fine blanking head according to claim 1, characterized in that the adjusting nut (6) is axially blocked at a wall region of the head piece (2) averted from the ram (1) having a shoulder (15) and hold by the tube-like part (18) of the flange (19) against the lifting movement of the ram.
  3. Fine blanking head according to claim 1, characterized in that the adjusting nut (6) and the head piece (2) are provided with at least one conduit (50), which opens into the motion thread for supplying the threads with lubricant.
  4. Fine blanking head according to claim 1, characterized in that in the tube-like part (18) of the flange (19) is provided at least one conduit (46) for draining lubricant from the motion threads (12, 13).
  5. Fine blanking head according to the claims 3 and 4, characterized in that the conduits (46, 47) are each with respectively one pipe (48) are connected to a lubricant reservoir.
  6. Fine blanking head according to claim 1, characterized in that the motion threads (12, 13) of adjusting nut (6) and main cylinder (10) are breech block threads.
  7. Fine blanking head according to claim 1, characterized in that the hydraulic motor (8) with a feeding pipe (62) is connected to a high-pressure hydraulic system via a pilot controlled proportion valve (37) for adjusting a presetable actuating pressure.
  8. Fine blanking head according to claim 1, characterized in that the interacting with motor (8) brake (59) by a pipe (60)is connected with a low-pressure hydraulic system via a switchable directional control valve (55) for switching the brake (59) on and off.
  9. Fine blanking head according to claim 1, characterized in that the conduit (54, 56) for feeding the fluid through a pipe (61) is connected to the low-pressure hydraulic system via a switchable directional control valve (55) for opening and closing the pipe.
  10. Fine blanking head according to claim 1, characterized in that the driving chain (9) is a hollow pin chain.
  11. Fine blanking head according to claim 1, characterized in that the sprocket wheel (7) is allocated at least on more sprocket wheel (35), the rotation axis of which is positioned parallel offset to sprocket wheel (7) on a plate (57), wherein the sprocket wheels (7, 35) are in true horizontal alignment on one plane to each other.
  12. Fine blanking head according to claim 1 characterized in that at the facing the ram (1) retaining plate (24) is positioned rigid to torsion a touch table (26) by antitwist protection pins (23) guided axially parallel to the stroke axis (HU) in holes (22) in the tube-like part (18) of the flange (19).
  13. Fine blanking head according to the claims 1 and 12, characterized in that in the main cylinder (10) are accommodated a V-shaped projection piston (27) for moving the V-shaped projection, several V-shaped projection pins (29) and a touch piston (28) lying with regard to each other on the stroke axis (HU) for detecting a defined between retaining plate (24) and touch table (26) lifting distance.
  14. Fine blanking head according to claim 13, characterized in that in the main plate (24) coaxially to the stroke axis (HU) are positioned several V-shaped projection pins (29) supporting the pressure plate (30), wherein a central support (32) for the pressure plate (30) is provided in alignment with the stroke axis (HU), wherein the pressure plate (30) is hold by a retaining ring (31) at the touch table (26).
  15. Method for infeeding a hydraulic fine blanking had in a press, especially a fine blanking press, wherein to the guided in the main cylinder pistons and pins for producing a pressure and/or deformation force is applied an adjustable displacement respectively working pressure of a hydraulic fluid from a high pressure source of a hydraulic system and the press ram is actuated mechanically or hydraulically, characterized by the following steps:
    a Locking an adjusting mechanism (11) consisting of motion threads (12, 13) of a in the head piece of the fine blanking head turnable around the stroke axis (HU) adjusting nut (6) and a main cylinder (10) during the admission of the pressure and forming force by permanently axially feeding fluid preset to a locking pressure via a conduit leading to the adjusting mechanism for abolishing an axial backlash between the motion threads,
    b Unlocking both of the motion threads after finishing to admit the pressure and forming force by switching off the locking pressure by means of shutting off the conduit,
    c Feeding a preset to an actuating pressure fluid to a hydraulic motor to operate the adjusting mechanism by turning a fixed to the adjusting nut sprocket wheel via a driven by the motor chain until the main cylinder has reached a pre-determined position with regard to a preset infeed position,
    d Switching off the motor by shutting of the feeding of the preset to driving pressure fluid and connecting the brake pressure adjusted by the actuating pressure to a brake pressure fluid for fixing the adjusted position of the fine blanking head and
    e again switching on the locking pressure to the adjusting mechanism for locking the motion threads according to step a.
EP20090007352 2009-06-03 2009-06-03 Hydraulic fine-blanking head for a press and method for moving same Active EP2258495B1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP20090007352 EP2258495B1 (en) 2009-06-03 2009-06-03 Hydraulic fine-blanking head for a press and method for moving same
AT09007352T ATE533574T1 (en) 2009-06-03 2009-06-03 HYDRAULIC FINE CUTTING HEAD FOR A PRESS AND METHOD FOR DELIVERY THEREOF
CA2705666A CA2705666C (en) 2009-06-03 2010-05-27 Hydraulic fine blanking head for a press and method of its infeed
JP2010126758A JP5715769B2 (en) 2009-06-03 2010-06-02 Hydraulic precision cutter head for pressing and method for adjusting the height position of this precision cutter head
KR1020100052462A KR101722782B1 (en) 2009-06-03 2010-06-03 Hydraulic fine blanking head for a press and method of its infeed
CN201010197598XA CN101905264A (en) 2009-06-03 2010-06-03 The hydraulic pressure fine-edge blanking head and the feeding method thereof that are used for forcing press
US12/792,977 US8141482B2 (en) 2009-06-03 2010-06-03 Hydraulic fine blanking head for a press and method of its infeed

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20090007352 EP2258495B1 (en) 2009-06-03 2009-06-03 Hydraulic fine-blanking head for a press and method for moving same

Publications (2)

Publication Number Publication Date
EP2258495A1 EP2258495A1 (en) 2010-12-08
EP2258495B1 true EP2258495B1 (en) 2011-11-16

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20090007352 Active EP2258495B1 (en) 2009-06-03 2009-06-03 Hydraulic fine-blanking head for a press and method for moving same

Country Status (7)

Country Link
US (1) US8141482B2 (en)
EP (1) EP2258495B1 (en)
JP (1) JP5715769B2 (en)
KR (1) KR101722782B1 (en)
CN (1) CN101905264A (en)
AT (1) ATE533574T1 (en)
CA (1) CA2705666C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3115120A1 (en) * 2015-07-06 2017-01-11 Feintool International Holding AG Precision cutting press

Families Citing this family (11)

* Cited by examiner, † Cited by third party
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CN102729518B (en) * 2011-04-13 2015-12-16 昆山永年先进制造技术有限公司 Hydraulic press, for the cylinder girder construction of hydraulic press and manufacture method thereof
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CN101905264A (en) 2010-12-08
US20110000349A1 (en) 2011-01-06
JP2010280000A (en) 2010-12-16
CA2705666A1 (en) 2010-12-03
US8141482B2 (en) 2012-03-27
ATE533574T1 (en) 2011-12-15
JP5715769B2 (en) 2015-05-13
KR101722782B1 (en) 2017-04-11

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