WO1990014920A1 - Einrichtung zur betätigung der schweisselektrode oder schweisszange von widerstandsschweissgeräten - Google Patents
Einrichtung zur betätigung der schweisselektrode oder schweisszange von widerstandsschweissgeräten Download PDFInfo
- Publication number
- WO1990014920A1 WO1990014920A1 PCT/EP1989/000600 EP8900600W WO9014920A1 WO 1990014920 A1 WO1990014920 A1 WO 1990014920A1 EP 8900600 W EP8900600 W EP 8900600W WO 9014920 A1 WO9014920 A1 WO 9014920A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- welding
- cylinder
- spindle
- piston
- tongs
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/30—Features relating to electrodes
- B23K11/31—Electrode holders and actuating devices therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/30—Features relating to electrodes
- B23K11/31—Electrode holders and actuating devices therefor
- B23K11/311—Electrode holders and actuating devices therefor the actuating device comprising an electric motor
Definitions
- the invention relates to a device for actuating the welding head or the welding gun of resistance welding devices in automatic welding machines, robots or the like.
- Program-controlled welding devices according to the preamble of claim 1.
- welding drives of resistance welding devices consist of hydraulic or pneumatic cylinder arrangements or mechanical spring force drives. They have proven themselves essentially well, but they require considerable construction effort. only little variability in view of the fact that with them - about.
- Use of a gun welder - both the preliminary stroke as well as the working stroke as well as the repositioning necessary in the welding phase must be carried out.
- hydraulic double cylinders or so-called pneumo-hydraulic power packs are known, in which, for example, a hydraulic cylinder which is designed to carry out the working stroke is arranged in the piston of a pneumatic cylinder which is used to carry out the forward stroke.
- these cylinder arrangements have the particular disadvantage that they are fixed to a pre-stroke once selected, which, although used for another purpose, cannot be exceeded in any case - without constructive intervention in the cylinder arrangement .
- these cylinder arrangements have the further disadvantage that a path interruption which delays the workflow occurs between the forward stroke and the working stroke when retracting and extending.
- system-inherent disadvantages such as - in water-hydraulic systems - aggressiveness of the hydraulic medium towards valves and - this also applies to oil-hydraulic systems - considerable damage, especially in welding equipment, if leakages occur.
- the present invention has for its object to provide a structurally simple and easily controllable device of the type described. This problem is solved by a device with the features set out in claims 1 and 2.
- the drive according to the invention is structurally simple and allows an infinitely variable adjustment of both the preliminary stroke and the working stroke, changes in the preliminary stroke generally not being subject to an upper limit and requiring no intervention in the system. It is not necessary to interrupt the path after executing the preliminary stroke in the course of the first starting stroke.
- the control is simple, and the pressure, particularly in the tracking phase, can be regulated in a simple manner by means of a torque regulator. The need to supply three energy sources (air, hydraulics, electricity) and the resulting installation effort are eliminated, the entire operation is carried out with one energy source, and there are also no leakages in impairments and hazards that occur in the liquid lines.
- FIG. 1 shows an embodiment of a device for actuating
- FIG. 2 shows another embodiment of an actuating device according to the invention in section.
- Fig. 3 is a schematic representation of another embodiment of the invention.
- Welding devices consists of a cylinder 1 fixed to the frame, to which one of the two gun arms is fastened, for example when welding guns are actuated, and a guided in the cylinder 1 fixed to the welding electrode. the other arm of the welding gun connected piston 2.
- the piston 2 is designed as a sleeve open on one side for receiving a spindle drive actuated by an electromotive drive, the thread drive 3 in the case of the embodiment shown in FIG. 1 rigid in the with. the welding electrode. attached to the actuated arm of the welding gun, in the cylinder 1 axially movably guided piston 2 and its in the cylinder 1 rotatably mounted threaded spindle 5 is connected to an electric motor drive 7.
- the threaded sleeve 8 is connected in a rotationally fixed manner to the rotor of the electromotive drive 7 and the threaded spindle 9 is rigidly connected to the piston 2 axially guided in the cylinder 19, whereby Expediently, the thread guide 8 forms part of the rotor. is made in one piece with this.
- the welding cylinder is formed by an electronically commutated three-phase motor with an integrated rotor position system - housing 11, winding 12 - in which the motor shaft 13 is designed as a hollow shaft with a fixed, connected spindle nut 14 and by means of an axial-radial bearing 15 is mounted in a bearing receiving flange 16.
- the spindle drive is formed by a so-called "planetary roller spindle", on the spindle 17 of which the axially guided, i.e. pressure plate 18 secured against rotation is attached.
- the arrangement is such that the spindle 17 - for example by means of a guide pin (not shown) arranged on the pressure plate 18 and projecting into the bearing mounting flange 16 - is secured against rotation with the pressure plate 18.
- This embodiment of a welding cylinder according to the invention is a closed, structurally extremely simple ches system in which the pressure plate is acted upon directly by the motor shaft without the interposition of a transmission or other power transmission device.
- the device is therefore also structurally extremely simple and wear-resistant and, unlike the known devices, requires a considerably reduced installation space while also reducing the energy requirement by up to 80%. It also enables the free determination of the stroke lengths for the pre-stroke and working stroke when the electrode is placed gently on the workpiece, in view of the fact that the full torque, which determines the contact pressure, only builds up continuously after the electrode has been placed on. As a result, there is also a considerable increase in the service life of the electrodes and a reduction in noise.
- the contact pressure-determining torque is automatically readjusted to the specified target value during the welding process, so that the softening of the welding point and the operational electrode burn-off occurring during the welding process are automatically compensated.
- the commutated three-phase motor is advantageously preceded by a control element which, given the desired contact pressure and the desired speed-dependent stroke speed, regulates the motor current required for the torque to be applied and controls the welding control after the torque has been reached.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Resistance Welding (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP1989/000600 WO1990014920A1 (de) | 1989-05-30 | 1989-05-30 | Einrichtung zur betätigung der schweisselektrode oder schweisszange von widerstandsschweissgeräten |
EP19890906749 EP0426689A1 (de) | 1989-05-30 | 1989-05-30 | Einrichtung zur betätigung der schweisselektrode oder schweisszange von widerstandsschweissgeräten |
DE8908048U DE8908048U1 (de) | 1989-05-30 | 1989-05-30 | Einrichtung zur Betätigung der Schweißelektrode oder Schweißzange von Widerstandsschweißgeräten |
FI910340A FI910340A0 (fi) | 1989-05-30 | 1991-01-23 | Anordning foer anvaendning av svetselektroder eller svetstaenger i en motstaendsvetsmaskin. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP1989/000600 WO1990014920A1 (de) | 1989-05-30 | 1989-05-30 | Einrichtung zur betätigung der schweisselektrode oder schweisszange von widerstandsschweissgeräten |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1990014920A1 true WO1990014920A1 (de) | 1990-12-13 |
Family
ID=8165395
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1989/000600 WO1990014920A1 (de) | 1989-05-30 | 1989-05-30 | Einrichtung zur betätigung der schweisselektrode oder schweisszange von widerstandsschweissgeräten |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0426689A1 (de) |
FI (1) | FI910340A0 (de) |
WO (1) | WO1990014920A1 (de) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4322496A1 (de) * | 1993-07-06 | 1995-01-19 | Somako Hirsch & Attig Gmbh | Verfahren und Anordnung zur Durchführung des Verfahrens für das Positionieren des Schweißkopfes einer Schweißmaschine |
DE4331139A1 (de) * | 1993-09-14 | 1995-03-16 | Jaeger Emil Gmbh Co Kg | Gitterschweißmaschine mit servogesteuerter Traverse |
DE4439833A1 (de) * | 1994-11-08 | 1996-05-09 | Wanzl Metallwarenfabrik Kg | Verfahren und zur Durchführung des Verfahrens vorgesehene Schweißmaschine zum Widerstandsschweißen von stab- und blechförmigem Halbzeug |
WO1996026038A1 (en) * | 1995-02-21 | 1996-08-29 | Aura Systems, Inc. | Positioning and electromagnetic clamping device for welder |
EP0901868A1 (de) * | 1997-09-04 | 1999-03-17 | Messer Griesheim Schweisstechnik GmbH + Co. | Widerstandspressschweissmaschine |
EP1088614A1 (de) * | 1999-09-30 | 2001-04-04 | NIMAK Automatisierte Schweisstechnik GmbH | Roboterschweisszange |
EP1221351A1 (de) * | 2000-12-08 | 2002-07-10 | Progressive Tool & Industries Company | Schweisszange mit Kugelumlaufspindelgetriebe |
DE10300628A1 (de) * | 2003-01-10 | 2004-07-22 | Abb Patent Gmbh | Verfahren und Messanordnung zum Betrieb von Punktschweißzangen |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2844708A (en) * | 1957-03-27 | 1958-07-22 | Sidney M Harvey | Welding electrode actuator |
EP0047545A2 (de) * | 1980-09-05 | 1982-03-17 | Luigi Dr.Ing. Caprioglio | Greiferhalter für einen elektrischen Schweissroboter |
FR2585976A1 (fr) * | 1985-08-09 | 1987-02-13 | Aro | Machine de soudage par resistance a commande numerique et systeme vis et ecrou ou analogue |
-
1989
- 1989-05-30 EP EP19890906749 patent/EP0426689A1/de not_active Withdrawn
- 1989-05-30 WO PCT/EP1989/000600 patent/WO1990014920A1/de not_active Application Discontinuation
-
1991
- 1991-01-23 FI FI910340A patent/FI910340A0/fi unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2844708A (en) * | 1957-03-27 | 1958-07-22 | Sidney M Harvey | Welding electrode actuator |
EP0047545A2 (de) * | 1980-09-05 | 1982-03-17 | Luigi Dr.Ing. Caprioglio | Greiferhalter für einen elektrischen Schweissroboter |
FR2585976A1 (fr) * | 1985-08-09 | 1987-02-13 | Aro | Machine de soudage par resistance a commande numerique et systeme vis et ecrou ou analogue |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4322496A1 (de) * | 1993-07-06 | 1995-01-19 | Somako Hirsch & Attig Gmbh | Verfahren und Anordnung zur Durchführung des Verfahrens für das Positionieren des Schweißkopfes einer Schweißmaschine |
DE4331139A1 (de) * | 1993-09-14 | 1995-03-16 | Jaeger Emil Gmbh Co Kg | Gitterschweißmaschine mit servogesteuerter Traverse |
DE4439833A1 (de) * | 1994-11-08 | 1996-05-09 | Wanzl Metallwarenfabrik Kg | Verfahren und zur Durchführung des Verfahrens vorgesehene Schweißmaschine zum Widerstandsschweißen von stab- und blechförmigem Halbzeug |
WO1996026038A1 (en) * | 1995-02-21 | 1996-08-29 | Aura Systems, Inc. | Positioning and electromagnetic clamping device for welder |
EP0901868A1 (de) * | 1997-09-04 | 1999-03-17 | Messer Griesheim Schweisstechnik GmbH + Co. | Widerstandspressschweissmaschine |
DE19738647A1 (de) * | 1997-09-04 | 1999-03-25 | Messer Griesheim Schweistechni | Widerstandspreßschweißmaschine |
EP1088614A1 (de) * | 1999-09-30 | 2001-04-04 | NIMAK Automatisierte Schweisstechnik GmbH | Roboterschweisszange |
EP1221351A1 (de) * | 2000-12-08 | 2002-07-10 | Progressive Tool & Industries Company | Schweisszange mit Kugelumlaufspindelgetriebe |
DE10300628A1 (de) * | 2003-01-10 | 2004-07-22 | Abb Patent Gmbh | Verfahren und Messanordnung zum Betrieb von Punktschweißzangen |
Also Published As
Publication number | Publication date |
---|---|
FI910340A0 (fi) | 1991-01-23 |
EP0426689A1 (de) | 1991-05-15 |
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