WO1996035545A1 - Drahtzuführvorrichtung an einer maschine zum funkenerosiven bearbeiten von werkstücken - Google Patents
Drahtzuführvorrichtung an einer maschine zum funkenerosiven bearbeiten von werkstücken Download PDFInfo
- Publication number
- WO1996035545A1 WO1996035545A1 PCT/EP1996/001969 EP9601969W WO9635545A1 WO 1996035545 A1 WO1996035545 A1 WO 1996035545A1 EP 9601969 W EP9601969 W EP 9601969W WO 9635545 A1 WO9635545 A1 WO 9635545A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- spool
- electrode wire
- carrier
- take
- reel
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
- B23H7/02—Wire-cutting
- B23H7/08—Wire electrodes
- B23H7/10—Supporting, winding or electrical connection of wire-electrode
Definitions
- the invention relates to a wire feed device on a machine for the electrical discharge machining of workpieces with an electrode wire which is drawn off from a payout spool and guided via guide rollers to a processing line, the payout spool being rotatably mounted on an axle pin, the axle pin being fastened to a carrier which is displaceable in the axial direction of the pay-off spool, a measuring device is arranged between the pay-off spool and the first guide roller, which detects deviations in the position of the electrode wire from a predefined position, and the carrier is connected to a displacement drive which detects deviations in the position of the Corrected electrode wire running from the payout spool by axially displacing the carrier.
- the axial displaceability of the payout spool is based on the knowledge that vibrations can be excited on the idler roller immediately following the payout spool, which vibrations can affect the processing distance are transmitted and can adversely affect the dimensional accuracy and surface quality of the machined workpieces.
- vibrations arise in an axially immovable arrangement of the payout spool in that the layered electrode wire runs at a different angle at the beginning of each layer than at the end, and from a certain angle tends to flank a groove receiving it directly on periodically climb up the idler roller following the reel and slide back into the slot bottom.
- This is avoided in the known device of the generic type by controlling the payout spool in a controlled manner. is pushed that the electrode wire constantly maintains a certain position in which it extends at a right angle to the axis of the supply spool.
- JP 07 001 247 A It is also known (JP 07 001 247 A) to wind up used electrode wire for the purpose of disposal on a take-up spool and to move this spool axially back and forth in a controlled manner so that its winding space is fully utilized.
- the invention is based on the knowledge that even when the used electrode wire is wound up, vibrations can be excited which propagate as far as the processing section and there can have an unfavorable influence on the dimensional accuracy and surface quality of the machined workpiece.
- the invention is based on the object of also avoiding such vibrations.
- the object is achieved on the basis of a wire feed device of the type described at the outset in that
- a take-up spool is provided, which is mounted on a second axle pin,
- the second axle pin is fastened on the carrier parallel to the first axle pin
- Both coils are axially immovable relative to their axle bolts (42, 44), and
- the electrode wire is guided so that it always runs in the same axis-normal plane when winding onto the take-up spool as when unwinding from the take-off spool.
- the device according to the invention is preferably further developed in that
- the measuring device has a measuring roller which is axially displaceable axially parallel to the payout spool and has an annular groove leading the electrode wire, and
- the measuring device further comprises sensors which, when the measuring roller is deflected from a normal axial position, emits correction signals to the displacement drive.
- the sensors are preferably inductive proximity switches.
- the displacement drive has a servo motor and a threaded drive.
- the two coils are each connected to a motor which is arranged on the carrier and drives the take-up spool, but has a braking effect on the take-up spool, the two motors being regulated so that the electrode wire is under a substantially constant tension is held.
- FIG. 1 shows a side view of a spark erosion machine with a device according to the invention
- FIG. 2 shows an enlarged detail from FIG. 1
- FIG. 3 shows the vertical section III - III in Fig.2, Fig.4 the horizontal section IV-IV in Fig.2.
- the device shown has a housing 10 which can be adjusted numerically controlled along a horizontal axis Y in a manner customary in EDM machines (for example DE 41 15 107 C2).
- a guide 12 is formed on the housing 10, on which a slide 14 is guided so as to be numerically controlled and displaceable along a vertical axis W.
- the carriage 14 carries a tool head 16 which is rotatable about a vertical axis E, also numerically controlled.
- a fork-shaped wire holder 18 for an electrode wire 20 is fastened to the tool head 16.
- the electrode wire 20 is supplied by a payout spool 22, on which it is wound, as usual, in windings lying close to one another and in layers one above the other.
- Guide rollers 24 and 26 are mounted on the housing parallel to the axis of the take-off spool 22.
- the electrode wire 20 first runs over the guide rollers 24 and 26, then over guide rollers 28 and 30 mounted on the slide 14, then essentially vertically downwards to the wire holder 18, where the electrode wire 20, guided by further guide rollers, passes through a processing section 32, in the middle of which it is crossed by the axis of rotation E.
- the electrode wire 20 runs from the processing section 32 via a further guide roller 34 mounted on the slide 14 and finally via guide rollers 36 and 38 mounted on the housing 10 axially parallel to the guide rollers 24 and 26 to a take-up spool 40 which is underneath the payout spool 22, axially parallel to this, is stored.
- the take-off spool 22 and the take-up spool 40 are each supported on an axle bolt 42 or 44, but are prevented in operation by a locking screw 46 or 48 from operating in relation to one another to move axially on the associated axle bolt.
- the locking screws 46 and 48 are only loosened to replace the take-off spool 22 or take-up spool 40.
- the two axle bolts 42 and 44 are fastened horizontally and parallel to one another on a carrier 50 in such a way that the winding spaces of the two coils 22 and 40 lie exactly one above the other.
- the carrier 50 has the shape of a vertical plate and is guided by means of a guide bush 52 fastened to it on a horizontal guide rod 54 which is fastened to the housing 10.
- two guide rollers 56 are mounted on the carrier at the greatest possible distance from it, each rotatable about a vertical axis, between which a guide bar 58 fastened to the housing 10 and parallel to the guide rod 54 is mounted is arranged.
- the carrier 50 is assigned a displacement drive 60, which is controlled so that the electrode wire 20 is always supplied to the guide rollers 24 and 26 at right angles to their axes of rotation and is wound onto the take-up spool 40 in windings lying close together and in layers one above the other, as is the case with the payout spool 22 has been unwound.
- the sliding drive 60 includes a servo motor 62, which is connected via a belt drive 64 to a threaded spindle 66, which is mounted in the housing 10 and is parallel to the axes of rotation of the take-off spool 22 and the take-up spool 40.
- the threaded spindle 66 forms, with a threaded nut 68 formed on the carrier 50, a backlash-free screw drive, so that the position of the carrier 50, and thus also the take-off spool 22 and the take-up spool 44, can be regulated with high accuracy via the servo motor 62.
- the displacement drive 60 is part of a control loop, to which a measuring arrangement 70 with a measuring roller 72 belongs.
- the measuring roller 72 is mounted on an axle bolt 74 which is fastened to the housing 10 and is parallel to the axle bolts 42 and 44, and is freely rotatable and freely axially displaceable.
- Axial displacements of the measuring roller 72 on the axle pin 74 are monitored by sensors 76 and 78, which are attached to the housing 10.
- the rotational movements of the coils 22 and 40 are controlled by a rotary drive controller 80 so that the electrode wire 20 is constantly under substantially constant tension.
- the controller 80 regulates a motor 82, which normally acts as a brake on the payout spool 22 via a belt drive 84, and a motor 86 which drives the take-up spool 40 via a belt drive 88. Both motors 82 and 86 are mounted on the carrier 50 so that they participate in its movements in the direction of the axes of the two coils 22 and 40.
- the electrode wire 20 coming from the take-off spool 22 runs, before it reaches the guide rollers 24 and 26, over a cross-sectionally V-shaped annular groove of the measuring roller 72, so that its position on the axle bolt 74 by a from the electrode wire 20 to the measuring roller 72 applied axial force is changeable.
- the axial force is only zero if the electrode wire 20 runs in a plane normal to the axes of rotation of the take-off spool 22 and the two guide rollers 24 and 26, which is perpendicular in the example shown.
- any deviation from this desired state causes the measuring roller 72 to move axially on its axle bolt 74, and as a result, depending on the direction of the axial displacement, one or the other sensor 76 or 78 emits a signal to the servomotor 62 and causes it to to turn in one direction or the other in order to restore the described desired state.
- the carrier 50 is pushed back and forth along the guide rod 54 to the extent that the individual wire layers formed by the electrode wire 20 on the payout spool 22 are consumed.
- the distance by which the carrier 50 together with the take-off reel 22 and take-up reel 40 is pushed back and forth corresponds to the width of the winding space of these reels.
- the joint displacement of the two coils 22 and 40 ensures that the electrode wire 20 always runs in the same plane E, which is vertical in the example shown, when winding from the winding coil 40 on the winding coil
- the electrode wire 20 is wound on the take-up spool 40 in turns that are just as close to one another and in layers one above the other as it was wound on the take-up spool 22.
- the ordered arrangement of the electrode wire which generally comes from a wire manufacturer, is thus, as it were, copied onto the take-up spool 40.
- the electrode wire on the take-up spool 40 as well as on the take-up spool 22 has no possibility of slipping off a wire winding or breaking between two wire windings and thereby inducing vibrations.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP96916029A EP0824390A1 (de) | 1995-05-11 | 1996-05-09 | Drahtzuführvorrichtung an einer maschine zum funkenerosiven bearbeiten von werkstücken |
US08/875,460 US5861598A (en) | 1995-05-11 | 1996-05-09 | Wire supply device on a machine for spark erosion of workpieces |
JP53376696A JP3830163B2 (ja) | 1995-05-11 | 1996-05-09 | 加工片の火花浸食用機械のワイヤ供給装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19517370A DE19517370C2 (de) | 1995-05-11 | 1995-05-11 | Drahtzuführvorrichtung an einer Maschine zum funkenerosiven Bearbeiten von Werkstücken |
DE19517370.8 | 1995-05-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1996035545A1 true WO1996035545A1 (de) | 1996-11-14 |
Family
ID=7761701
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1996/001969 WO1996035545A1 (de) | 1995-05-11 | 1996-05-09 | Drahtzuführvorrichtung an einer maschine zum funkenerosiven bearbeiten von werkstücken |
Country Status (6)
Country | Link |
---|---|
US (1) | US5861598A (de) |
EP (1) | EP0824390A1 (de) |
JP (1) | JP3830163B2 (de) |
DE (1) | DE19517370C2 (de) |
TW (1) | TW340428U (de) |
WO (1) | WO1996035545A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6017096B1 (ja) * | 2015-10-30 | 2016-10-26 | 三菱電機株式会社 | ワイヤ放電加工機、ワイヤ放電加工機の制御装置の制御方法及び位置決め方法 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58109227A (ja) * | 1981-12-17 | 1983-06-29 | Fanuc Ltd | ワイヤカツト放電加工機 |
JPS63235269A (ja) * | 1987-03-23 | 1988-09-30 | Brother Ind Ltd | ワイヤカツト放電加工機 |
DE8912810U1 (de) * | 1989-10-28 | 1989-12-28 | Kleinlein, Karl, 8561 Ottensoos | Drahtvorratsspulensteuereinrichtung |
JPH071247A (ja) * | 1993-06-21 | 1995-01-06 | Makino Milling Mach Co Ltd | ワイヤ放電加工機のワイヤ回収装置 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH585086A5 (de) * | 1975-11-10 | 1977-02-28 | Agie Ag Ind Elektronik | |
US4386248A (en) * | 1978-10-06 | 1983-05-31 | Inoue-Japax Research Incorporated | Electrical machining method and apparatus for forming a 3D surface contour in a workpiece with a traveling-wire electrode |
JP2781816B2 (ja) * | 1990-02-16 | 1998-07-30 | 株式会社ソディック | ワイヤ電極供給装置 |
JP2631575B2 (ja) * | 1990-10-19 | 1997-07-16 | ファナック株式会社 | ワイヤ送り出し装置 |
DE4115107A1 (de) * | 1991-05-08 | 1992-11-12 | Vollmer Werke Maschf | Verfahren und maschine zum elektroerosiven bearbeiten von schneidplatten |
-
1995
- 1995-05-11 DE DE19517370A patent/DE19517370C2/de not_active Expired - Lifetime
-
1996
- 1996-05-09 JP JP53376696A patent/JP3830163B2/ja not_active Expired - Fee Related
- 1996-05-09 US US08/875,460 patent/US5861598A/en not_active Expired - Fee Related
- 1996-05-09 WO PCT/EP1996/001969 patent/WO1996035545A1/de not_active Application Discontinuation
- 1996-05-09 EP EP96916029A patent/EP0824390A1/de not_active Withdrawn
- 1996-05-25 TW TW086205358U patent/TW340428U/zh unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58109227A (ja) * | 1981-12-17 | 1983-06-29 | Fanuc Ltd | ワイヤカツト放電加工機 |
JPS63235269A (ja) * | 1987-03-23 | 1988-09-30 | Brother Ind Ltd | ワイヤカツト放電加工機 |
DE8912810U1 (de) * | 1989-10-28 | 1989-12-28 | Kleinlein, Karl, 8561 Ottensoos | Drahtvorratsspulensteuereinrichtung |
JPH071247A (ja) * | 1993-06-21 | 1995-01-06 | Makino Milling Mach Co Ltd | ワイヤ放電加工機のワイヤ回収装置 |
Non-Patent Citations (3)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 007, no. 215 (M - 244) 22 September 1983 (1983-09-22) * |
PATENT ABSTRACTS OF JAPAN vol. 013, no. 025 (M - 787) 20 January 1989 (1989-01-20) * |
PATENT ABSTRACTS OF JAPAN vol. 95, no. 001 * |
Also Published As
Publication number | Publication date |
---|---|
JPH11504573A (ja) | 1999-04-27 |
JP3830163B2 (ja) | 2006-10-04 |
TW340428U (en) | 1998-09-11 |
EP0824390A1 (de) | 1998-02-25 |
DE19517370A1 (de) | 1996-11-14 |
DE19517370C2 (de) | 1997-07-10 |
US5861598A (en) | 1999-01-19 |
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