WO1998007000A1 - Verfahren und vorrichtung zum messen der überlappungsbreite eines überlappungsstosses von zwei flach aufeinanderliegenden werkstücken - Google Patents
Verfahren und vorrichtung zum messen der überlappungsbreite eines überlappungsstosses von zwei flach aufeinanderliegenden werkstücken Download PDFInfo
- Publication number
- WO1998007000A1 WO1998007000A1 PCT/EP1997/004140 EP9704140W WO9807000A1 WO 1998007000 A1 WO1998007000 A1 WO 1998007000A1 EP 9704140 W EP9704140 W EP 9704140W WO 9807000 A1 WO9807000 A1 WO 9807000A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- workpieces
- measuring
- overlap width
- distances
- measured
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/028—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness by measuring lateral position of a boundary of the object
Definitions
- a difficulty in determining the overlap width is that the abutting edges of the two workpieces can only be detected from different sides. Another difficulty is to quickly determine the position of the butt edges with high accuracy so that they can be used to control a feed device and / or a welding device.
- Another difficulty is to quickly determine the position of the butt edges with high accuracy so that they can be used to control a feed device and / or a welding device.
- two sensors responsive to the material web edges in particular laser sensors, to be arranged exactly opposite one another on opposite sides of the material web.
- these sensors When the overlap bumps pass through the barrier formed in this way, these sensors, depending on the overlap width, emit signals with a time delay to an evaluation device which also receives a signal for the material web speed. The overlap width can then be calculated from these signals. If two pairs of these sensors are arranged offset transversely to the web running direction and also lie in the same plane arranged transversely to the web running direction, an offset angle of the edges can also be determined with this method and this device. In both cases, however, the measurement accuracy depends on the exact alignment of the sensors to one another and further on that the path speed is constant in the phase between the first signal for the leading edge and the second signal for the trailing edge. It goes without saying that measurement errors can occur because of these requirements. Furthermore, this method and this device are limited to measurements in which the material web is moved past the sensors with a transverse overlap joint.
- a method for measuring the overlap width of an overlap shock of a tape section wound on a drum is known (DE 41 29 465 AI).
- the front end of the drum is simultaneously wound on the one hand
- Material web section and on the other hand, the associated angular position of the drum is detected.
- the rear end of the material web section and, on the other hand, the associated angular position of the drum are detected at the same time.
- the overlap width can be drawn directly from the differential value of the angular positions of the drum.
- the measurement result can be used to control an upstream feed device for the material web strips in such a way that the length of the material web sections to be fed in is corrected if the actual value for the overlap deviates from the target value.
- the so-called light-section triangulation method has proven itself in order to precisely capture the edges of, in particular, moving profiles (DE 44 31 922 AI).
- the invention is based on the object of developing a method and a device for measuring the overlap width of an overlap joint of two workpieces lying flat one above the other, which enables rapid, exact detection of the overlap width of two workpieces lying flat on one another.
- this object is achieved in that the distance between the edges of the workpieces from a common reference point or from two reference points having a defined distance from one another is measured without contact and the overlap width is calculated from these measured values.
- the distances are preferably measured using a measuring line running across the respective edge.
- This measurement along the measurement line can be carried out, for example, according to the known light section Triangulation method.
- the measuring line is formed with an air jet, which is generated with the aid of a slot-shaped nozzle. If the air jet blows onto a sheet metal surface, a dynamic pressure is generated. If a sheet whose edge lies within the impact surface of the air jet is moved parallel to the direction of the measuring line, the dynamic pressure of the air jet changes since it is covered differently. There is thus a clear connection between the position of the sheet edge and the dynamic pressure. The edge position can thus be determined with the aid of a dynamic pressure measurement.
- the method according to the invention which works without contact, initially provides two measured values for the position of the edge in relation to a fixed reference location or reference locations.
- the overlap width can be calculated from this purely geometric data.
- the spatial position of the edge in relation to the reference point can be determined via the distance between the edges, which is crucial for knowing the course of the edges.
- the defined distance from two reference points can be determined in a simple manner by measuring the .distances of the reference points from a common measuring edge lying in the measuring range.
- the distances of the edges from the reference point (s) at the points offset in the axial direction in order to compare these measured values a possible change in the overlap width and / or the degree of a possible one Determine the misalignment of one or both workpieces.
- the measurement is carried out either with a time shift in the case of workpieces moving parallel to the axial direction or at the same time at points offset in the axial direction, in which case, however, the distance from the measurement location to a parallel in the axial direction is either the same at both locations or must be taken into account in the measurement if the distance is different.
- the method according to the invention is universally applicable and is therefore not restricted to the movement of the workpieces in a specific direction.
- a target / value deviation of the overlap width or the skew is preferably stored in a location-specific manner and / or the workpieces are marked at the fault locations.
- the measurement method according to the invention is suitable for a method for bringing together two workpieces to be connected in an overlapping manner, the measurement result being used to control actuators of a device for bringing the workpieces together or a welding device.
- the invention also relates to a device for measuring the overlap width of two workpieces lying flat on top of one another, each with at least one measuring transducer directed towards the overlap joint and contactlessly measuring the distance between the edges and a reference point on each side of the workpieces lying on top of each other and with an evaluation unit for the measurement results the transducer, taking into account the position of the reference locations and the measured distances, an output signal for the overlap width and / or an output signal as an actuating signal for a marking unit and / or a Supply unit for the workpieces to be brought together or a welding device.
- the evaluation unit supplies the control signals in the event of a target / actual value • deviation.
- the device according to the invention it is also possible to determine the edge position of one or both workpieces, in particular the workpiece, which is responsible for a possible misalignment in the case of non-parallel edges, instead of or in addition to the overlap width.
- Fig. 7 diagrams for the distances of the edges of the two workpieces from reference points at points offset in the axial direction and the overlap widths and calculated from it
- Fig. 8 shows a measuring device in the form of a block diagram.
- each butt edge K 1 ( K 2 is assigned at least one, in the exemplary embodiment two, transducers 1, 2 , 3, 4, which are offset one behind the other in the axial direction.
- these transducers 1, 2 , 3, 4 work according to the known light section Triangulation method, which allows the position of a butt edge on a measuring line to be recorded transversely to the course of the butt edges K lr K 2 without contact and with high accuracy.
- the line-shaped measuring line is formed by a streak-shaped air jet and the sensors are Pressure sensors that measure the dynamic pressure in the measuring beam.
- the position of a butt edge within the measuring line can also be measured transversely to the course of the butt edges K X , K 2 quickly and with high accuracy without contact.
- the invention is described below using the example of the light section triangulation method. Since the method of the light section triangulation method is well known, it only needs to be dealt with to the extent necessary for the implementation of the method according to the invention.
- x 17 x 2 are the distances of the measuring locations from the reference locations N 1 # N 2 of the transducers 1, 2 , as shown in FIG. 3.
- FIGS. 4 and 5 relate to the measurement of the overlap width ul of two workpieces b lf b 2 lying one above the other as boards, each with a measuring transducer 1, 2 arranged on the top and one on the bottom, working according to the light section triangulation method.
- this measuring method there is a relative movement in the axial direction of the edges between the blanks b 1 ( b 2 and the transducers 1, 2 , as is the case, for example, when welding.
- the blanks b ⁇ b j one obtains for the overlap width gg at location n
- FIG. 5 shows these measured values in an upper diagram. They can be stored in a location-specific manner, in order for the workpieces b 1; b 2 to have a measurement report. An average value can be formed from the measured values in the upper diagram, which is shown in the lower diagram. The lower diagram shows a large number of such measured values for welded workpieces according to FIG. 4.
- FIGS. 6 and 7 differs from that of FIGS. 4 and 5 in that in this case the upper board b. to the lower board b 2 has an imbalance.
- the overlap width gg A and gg E is measured at two points offset in the axial direction. The measurement of the misalignment can be derived from these measurement results.
- the distance values x 1A and x 1B and x 2A and x 2B can also be used to determine which of the two boards b ! , b 2 is responsible for the imbalance. This is clear from the diagrams of FIG.
- the measuring device comprises two pairs of transducers 1, 2, 3, 4 for detecting the upper and lower edges of an overlap joint at points offset in the direction of the abutting edges.
- the transducers 1 to 4 operate according to the light section triangulation method, that is to say that they supply measured values for the distances from abutting edges, for example, from reference points or reference lines specified by the device.
- a converter 5 the analog measured values are converted into digital measured values and fed to a PC, which can process them into different measured values, in order to determine the
- Overlap width for determining the position of the edges with respect to a predetermined location, in particular for determining the skew or for generating an actuating signal for a marking unit M or for controlling a welding device and / or belt guiding device.
- the transducers can be arranged in a stationary manner, but they can also be moved along the abutting edges, for example with a welding device moving along the abutting edge. Then it is important however, that the relative distance between the reference points (zero lines) of the assigned transducers is kept constant.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP97942835A EP0918978A1 (de) | 1996-08-14 | 1997-07-30 | Verfahren und vorrichtung zum messen der über lappungsbreite eines überlappungsstosses von zwei flach aufeinanderliegenden werkstücken |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19632696.6 | 1996-08-14 | ||
DE1996132696 DE19632696C1 (de) | 1996-08-14 | 1996-08-14 | Verfahren und Vorrichtung zum Messen der Überlappungsbreite eines Überlappungsstoßes von zwei flach aufeinanderliegenden Werkstücken |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998007000A1 true WO1998007000A1 (de) | 1998-02-19 |
Family
ID=7802571
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1997/004140 WO1998007000A1 (de) | 1996-08-14 | 1997-07-30 | Verfahren und vorrichtung zum messen der überlappungsbreite eines überlappungsstosses von zwei flach aufeinanderliegenden werkstücken |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0918978A1 (de) |
DE (1) | DE19632696C1 (de) |
WO (1) | WO1998007000A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010046737A1 (de) * | 2010-09-28 | 2012-03-29 | Mag Ias Gmbh | Walzen mit Nutenblech |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3032509B1 (ja) * | 1998-11-19 | 2000-04-17 | 三菱電機株式会社 | 溶接機用板幅中心合せ方法及びその装置 |
DE102004040345B4 (de) * | 2004-08-20 | 2007-07-26 | Intelligendt Systems & Services Gmbh & Co Kg | Verfahren und Einrichtung zum Überprüfen des Stoßbereiches nebeneinander auf eine Unterlage gelegter Bahnen aus einem Faserverbundwerkstoff |
DE102017007751A1 (de) * | 2017-08-16 | 2019-02-21 | Linde Aktiengesellschaft | Positionierungsvorrichtung und Verfahren zur berührungslosen Positionierung |
DE102017214549A1 (de) * | 2017-08-21 | 2019-02-21 | Audi Ag | Schweißverfahren für Karosserieteile |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6298210A (ja) * | 1985-10-25 | 1987-05-07 | Bridgestone Corp | 移動物体の寸法測定装置 |
EP0530673A1 (de) * | 1991-09-05 | 1993-03-10 | Continental Aktiengesellschaft | Verfahren zur Bestimmung von Überlappungslängen an aufgewickelten Materialstreifen |
EP0536704A1 (de) * | 1991-10-08 | 1993-04-14 | Bridgestone/Firestone, Inc. | Vorrichtung zum Messen der Breite der Überlappung einer Klebestelle |
US5269859A (en) * | 1992-05-18 | 1993-12-14 | Sherry Donald E | Method of measuring length of lap joint between two sheets of material |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4431922A1 (de) * | 1994-09-08 | 1996-05-23 | Krupp Ag Hoesch Krupp | Lichtschnitt-Triangulations-Verfahren und Vorrichtung zur on-line-Vermessung von bewegten Profilen |
-
1996
- 1996-08-14 DE DE1996132696 patent/DE19632696C1/de not_active Expired - Fee Related
-
1997
- 1997-07-30 WO PCT/EP1997/004140 patent/WO1998007000A1/de not_active Application Discontinuation
- 1997-07-30 EP EP97942835A patent/EP0918978A1/de not_active Ceased
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6298210A (ja) * | 1985-10-25 | 1987-05-07 | Bridgestone Corp | 移動物体の寸法測定装置 |
EP0530673A1 (de) * | 1991-09-05 | 1993-03-10 | Continental Aktiengesellschaft | Verfahren zur Bestimmung von Überlappungslängen an aufgewickelten Materialstreifen |
EP0536704A1 (de) * | 1991-10-08 | 1993-04-14 | Bridgestone/Firestone, Inc. | Vorrichtung zum Messen der Breite der Überlappung einer Klebestelle |
US5269859A (en) * | 1992-05-18 | 1993-12-14 | Sherry Donald E | Method of measuring length of lap joint between two sheets of material |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 011, no. 305 (P - 623) 6 October 1987 (1987-10-06) * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010046737A1 (de) * | 2010-09-28 | 2012-03-29 | Mag Ias Gmbh | Walzen mit Nutenblech |
DE102010046737B4 (de) * | 2010-09-28 | 2016-10-27 | Mag Ias Gmbh | Verfahren zum Aufbringen einer Profilierung mittels Kaltwalzen in einer Kaltwalzmaschine mit Steuerung |
Also Published As
Publication number | Publication date |
---|---|
DE19632696C1 (de) | 1998-04-23 |
EP0918978A1 (de) | 1999-06-02 |
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