WO2001042707A2 - Verfahren und vorrichtung zur formoptimierenden bearbeitung einer gasflasche - Google Patents
Verfahren und vorrichtung zur formoptimierenden bearbeitung einer gasflasche Download PDFInfo
- Publication number
- WO2001042707A2 WO2001042707A2 PCT/EP2000/012186 EP0012186W WO0142707A2 WO 2001042707 A2 WO2001042707 A2 WO 2001042707A2 EP 0012186 W EP0012186 W EP 0012186W WO 0142707 A2 WO0142707 A2 WO 0142707A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- interface
- shape
- processing
- gas bottle
- measuring
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/4097—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by using design data to control NC machines, e.g. CAD/CAM
- G05B19/4099—Surface or curve machining, making 3D objects, e.g. desktop manufacturing
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/35—Nc in input of data, input till input file format
- G05B2219/35146—Enter data, calculate 3-D curve or surface, sculptured surface, okisurf
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/35—Nc in input of data, input till input file format
- G05B2219/35215—Generate optimal nc program variant as function of cost, time, surface, energy
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/37—Measurements
- G05B2219/37269—Ultrasonic, ultrasound, sonar
Definitions
- the invention relates to a method and a device for shape-optimizing processing of a gas bottle
- TRG compressed gases
- pressurized gas containers are pressurized gas cylinders made of steel and aluminum for compressed, liquefied or dissolved gases with a maximum full pressure of up to 200 bar. Users are increasingly demanding pressurized gas containers with a maximum full pressure of up to 300 bar. These 300 bar pressurized gas containers are also made of steel or aluminum In special applications, corrosion-resistant stainless steel is also used
- Composite gas cylinders consist of a seamless metal liner, which over a substantial part of its length is wrapped with composite fibers made of glass, carbon, aramid or wire is aramid and carbon fibers are lighter than glass fibers, with the same or higher strength properties and good impact strength
- BESTATIGUNGSKOPIE DE-A 197 21 128 provides for the 200 bar compressed gas cylinders in circulation to be used for the production of 300 bar composite cylinders.
- the time-consuming production of new liners for the 300 bar composite cylinders can be avoided, and instead of having to dispose of the 200 bar compressed gas cylinders in circulation, they are sent for sensible recycling.
- Post-processing that optimizes the shape is particularly suitable for gas bottles with walls that must have a constant or varying minimum wall thickness over the course of the gas bottle.
- a certain safety margin must be specified when manufacturing the walls. This in turn has the consequence that the gas cylinders made from the pipes can have a weight after completion that that of a gas bottle with a consistently optimal wall thickness, namely the minimum wall thickness, significantly exceeds.
- Post-processing is generally not carried out, since this has to be individually adapted for each gas bottle and the effort involved is considered to be economically unsustainable.
- the known devices for mechanical, shape-optimizing processing of workpieces include a processing unit for shape-changing, z. B. machining, machining. These include lathes in which a gas bottle can be clamped and processed using a tool controlled by a numerical control.
- the aforementioned object is achieved by a method for the shape-optimizing processing of gas bottles, which have at least in a partial area two mutually opposite interfaces, the distance between the interfaces, seen perpendicular to the first interface, at least in places exceeding a predetermined minimum distance and the second interface of a shape-changing processing is accessible, solved, in which the coordinates of a plurality of measurement points belonging to the first interface are measured, a plurality of base points determining a desired course of the second interface is determined, the location vector of each base point being determined by the vector sum of the location vectors of one of the measurement points and an as The amount of the vector having at least the minimum distance, oriented perpendicular to the first interface and pointing in the direction of the second interface, is given by the shape of the second interface work is brought to its target course.
- the first and second interfaces can be the inner and the outer surface of a wall of a gas bottle that is accessible for processing. which must have a minimum wall thickness.
- a gas bottle is, for example, tubular in its cylindrical part, the wall thickness of which should be constant and as close as possible to the minimum wall thickness.
- the course of the outer interface is shaped as parallel as possible to that of the inner interface.
- the result of such post-processing will usually be a non-circular tube in its cylindrical part, which, however, has a largely constant and optimal wall thickness. Then neither the inner nor the outer interface of the tube wall are smoothly cylindrical.
- the first interface does not have to have a free surface, but can e.g. B. also the ascertainable with the measuring unit used interface between two massive parts of a gas bottle.
- the method according to the invention can also be carried out in such a way that a program for the numerical control of a machine for shape-changing machining of the second interface is generated directly from the multiplicity of base points.
- the base points should be set as close as possible.
- a numerical control is then carried out, e.g. B. has a spline or nurs approximation, able to control a tool for shape-changing machining of the second interface with sufficient accuracy. If the density is sufficiently high, the minimum wall thickness to be observed can be selected as the distance between the measuring point and the associated base point, or with a small safety margin of, for example, 1%.
- the required high measuring point density especially in the case of large gas cylinders, can lead to long measuring times which are economically problematic.
- boundary conditions can be abandoned, e.g. B. that the distance of the target surface to each of the measuring points corresponds at least to the minimum wall thickness.
- the method according to the invention can be carried out in such a way that in one area of the gas bottle to be processed the second interface is machined while the coordinates of the measuring points are measured in another area.
- a measuring unit is provided for measuring interfaces of the gas bottle to be processed.
- the measuring unit can also be used to determine the geometric properties of the gas bottle that are only used to determine the optimal shape of an interface to be processed.
- An example here is the determination of the course of the inner surfaces of walls of a gas bottle, the outer interface of which has to be reworked in order to produce an optimal wall thickness course. A procedure suitable for this is set out above with reference to the method according to the invention.
- the device according to the invention can also be designed such that the processing unit is provided for machining. Furthermore, the device according to the invention can be designed such that the measuring unit comprises an ultrasonic sensor. An ultrasonic sensor is particularly suitable, with a measurement of the course of successive interfaces, e.g. B. to determine the outer and inner boundary surface of a wall.
- the device according to the invention can be designed such that a control unit for numerically controlling the processing unit is provided.
- the device according to the invention can also be designed such that the control unit and the measuring unit are linked to one another in terms of data processing technology in such a way that data obtained from the measuring unit can be used immediately or after it has been processed for the automatic generation of a control program for numerical control of the processing unit.
- the data processing technology link between the measuring unit and the control unit enables fully automatic post-processing.
- the device according to the invention can also be designed such that the processing unit and measuring unit can be used simultaneously. In this case, the processing unit would follow the measuring unit. As a result, a considerable amount of time can be saved.
- FIG. 1 a lathe with measuring unit, processing unit and control unit,
- FIG. 2a a compressed gas cylinder to be optimized in its shape in the lateral cross section
- FIG. 2b the compressed gas bottle according to FIG. 2a in axial cross section
- FIG. 3 a section of a target surface interpolated on the basis of base points of the interface to be machined
- Figure 4 the target area according to Figure 3 with a processing path for a
- FIG. 1 schematically shows a lathe in which a gas bottle 1 to be optimized in shape is clamped.
- the gas bottle 1 can be rotated in a controlled manner about its longitudinal axis via a motor, which is not shown separately here.
- a running rail 2 and a drive shaft 3 are mounted parallel to the longitudinal axis of the gas bottle 1, via which the travel unit 4 of an ultrasonic sensor 5 known per se and the travel unit 6 of a cutting tool 7 can be moved along the high-pressure pipe 1.
- the tool 7 can also be moved relative to the displacement unit 6 by means not shown here.
- the motor for rotating the gas bottle 1 as well as the travel units 4 and 6 and the axial position of the tool 7 relative to the longitudinal axis of the gas bottle 1 can be controlled with a control unit 8.
- Ultrasonic sensor 5 and the travel unit 6 of the tool 7 can form a unit or can be attached so as to be movable separately from one another. In the latter case, two drive shafts 3 must be provided.
- FIG 2a shows an example of the shape of the gas bottle 1 to be optimized in the lateral cross section, Figure 2b in the axial cross section.
- the tube wall 9 is considered uneven both in the longitudinal direction and in the circumferential direction due to manufacturing tolerances. However, it never falls below the minimum wall thickness provided for the use of gas bottle 1. However, the minimum wall thickness is significantly exceeded in many areas of gas bottle 1, which is disadvantageous for the Total weight of gas bottle 1 affects.
- a shape-optimized subsequent processing of the gas bottle 1 is intended to achieve the most uniform possible thickness of the tube wall 9 along the entire gas bottle 1, which essentially corresponds to the minimum wall thickness without falling below this.
- the gas bottle 1 clamped in the lathe is first measured with the ultrasonic sensor 5.
- the ultrasonic sensor 5 With the ultrasonic sensor 5, the coordinates of its outer surface 10 and its inner surface 11 can be determined at any point on the tube wall 8.
- a fine water jet 13 is directed onto the tube wall 8 of the gas bottle 1 via a nozzle 12 and an ultrasound is emitted onto the tube wall 8 via the water jet 13 via a sound generator (not shown separately here).
- the ultrasonic waves are reflected both on the outer surface 10 and on the inner surface 11 and then registered in the ultrasonic sensor 4.
- Both the distance of the outer surface 10 and the distance of the inner surface 11 from a specific reference point of the ultrasonic sensor 5 can be determined from the transit times. However, only the course of the inner surface 11 is decisive for the method concerned here.
- the measuring points can be distributed helically on the inner surface 11.
- the gas bottle 1 is rotated by a certain angle about its longitudinal axis after each measurement and at the same time the travel unit 4 of the ultrasonic sensor 5 is advanced by a certain distance.
- the coordinates of the measuring points on the inner surface 11 are now used to determine base points which are decisive for the desired course of the outer surface 10.
- the location vectors of the base points result from adding to the location vector of each measurement point a vector oriented at the associated measurement point perpendicular to the inner surface 11 and pointing to the outer surface 10, the amount of which corresponds at least to the minimum wall thickness.
- a security surcharge of e.g. B. 1% to 5% minimum wall thickness can be provided. It is now possible to enter the base points directly into a program for numerically controlling the tool 7 for machining the outer surface 10, if the density of the measurement points and thus that of the base points has been chosen sufficiently for this and the control 8 z. B. has a spline approximation.
- the base points on the outer surface 10 likewise essentially form a spiral.
- the helix of the base points corresponds to the machining path of the tool 7.
- the machining path typically has a machining feed of 0.2 mm per revolution of the gas bottle 1.
- approximately 360 base points distributed over the circumference would be necessary.
- 1,800,000 measuring points would result. Since the realizable measurement speed is limited, particularly in the case of ultrasound measurement, such a procedure is often not economically justifiable in the case of workpieces of this size. This procedure will therefore preferably be carried out for smaller workpieces.
- the base points can no longer be used directly to generate a program for numerically controlling the machining. Instead, the base points are used to generate a mathematical surface which approximates the ideal course of the outer surface 10 with sufficient accuracy.
- the base points are marked with Vy.
- a target surface 14 determined mathematically by approximation which is shown in detail in FIG. 3 with solid lines, then reproduces the target profile of the outer surface 10.
- FIG. 4 shows an example of a machining path 15 that is on the Target surface 14 is located and can be in spline or polynomial format. When viewed across the entire gas bottle 1, the path is essentially helical.
- the deviations of the desired surface 14 from a round shape shown in FIGS. 3 and 4 serve to illustrate that the inner surface 11 can also deviate considerably from a cylindrical shape. After processing, the inner surface 11 and
- Outer surface 10 is out of round and ideally parallel to one another with respect to the central axis of the gas bottle 1.
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU26716/01A AU2671601A (en) | 1999-12-06 | 2000-12-05 | Method and device for the shape-optimizing fabrication of gas cylinders |
EP00989944A EP1194715A2 (de) | 1999-12-06 | 2000-12-05 | Verfahren und vorrichtung zur formoptimierenden bearbeitung einer gasflasche |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1999158373 DE19958373A1 (de) | 1999-12-06 | 1999-12-06 | Verfahren und Vorrichtung zur formoptimierenden Bearbeitung einer Gasflasche |
DE19958373.0 | 1999-12-06 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2001042707A2 true WO2001042707A2 (de) | 2001-06-14 |
WO2001042707A3 WO2001042707A3 (de) | 2001-12-13 |
Family
ID=7931336
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2000/012186 WO2001042707A2 (de) | 1999-12-06 | 2000-12-05 | Verfahren und vorrichtung zur formoptimierenden bearbeitung einer gasflasche |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1194715A2 (de) |
AU (1) | AU2671601A (de) |
DE (1) | DE19958373A1 (de) |
RS (1) | RS49680B (de) |
WO (1) | WO2001042707A2 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101349900B (zh) * | 2008-08-12 | 2010-06-09 | 潘洪源 | 基于无线传感器网络的燃气大用户终端测控系统 |
AT511195B1 (de) * | 2011-01-28 | 2012-10-15 | Wfl Millturn Tech Gmbh & Co Kg | Verfahren zur verringerung der exzentrizität der innen- zur aussenfläche |
DE102017125125B3 (de) * | 2017-10-26 | 2019-04-25 | PA Propan & Ammoniak Anlagen GmbH | Verfahren zum Durchführen einer Druckprüfung eines Flüssiggastanks |
DE102020002421A1 (de) | 2020-04-22 | 2021-10-28 | Niles-Simmons Industrieanlagen Gmbh | Verfahren und Vorrichtung zur Ermittlung von Zentren eines in einer Werkzeugmaschine drehbar eingespannten Werkstückes mit einem freien Konturabschnitt im Innenraum |
DE202020003563U1 (de) | 2020-08-20 | 2021-12-06 | Niles-Simmons Industrieanlagen Gmbh | Vorrichtung zur Aufnahme von Baugruppen zur messtechnischen Erfassung, Bearbeitung oder Abstützung von Hohlwellen |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0191655A1 (de) * | 1985-01-15 | 1986-08-20 | Commissariat A L'energie Atomique | Verfahren zum Aufspulen eines Behälters |
US5442572A (en) * | 1992-11-23 | 1995-08-15 | Ford Motor Company | Method and system for comparing free-form geometries using high density point data models |
US5546328A (en) * | 1994-06-02 | 1996-08-13 | Ford Motor Company | Method and system for automated alignment of free-form geometries |
EP0854406A1 (de) * | 1997-01-21 | 1998-07-22 | Ford Global Technologies, Inc. | Verfahren zur Vorhersage des Volumens eines fertigen Verbrennungsraumes ausgehend von einer Rohform eines Zylinderkopfes |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5397869A (en) * | 1977-02-07 | 1978-08-26 | Mitsubishi Heavy Ind Ltd | Measurement of id and od of cylindrical material |
CH645564A5 (de) * | 1980-09-05 | 1984-10-15 | Heinz Hossdorf | Verfahren und vorrichtung fuer das formen der oberflaeche eines werkstuecks. |
DE3307042A1 (de) * | 1982-12-23 | 1984-06-28 | Jenny Pressen AG, Frauenfeld | Messgeraet und seine verwendung |
DE19721128A1 (de) * | 1997-05-20 | 1998-11-26 | Messer Griesheim Gmbh | Teilweise oder vollständige Verwendung einer an sich bekannten Druckgasflasche für verdichtete, verflüssigte oder gelöste Gase |
-
1999
- 1999-12-06 DE DE1999158373 patent/DE19958373A1/de not_active Ceased
-
2000
- 2000-12-05 WO PCT/EP2000/012186 patent/WO2001042707A2/de active Application Filing
- 2000-12-05 RS YUP-558/01A patent/RS49680B/sr unknown
- 2000-12-05 AU AU26716/01A patent/AU2671601A/en not_active Abandoned
- 2000-12-05 EP EP00989944A patent/EP1194715A2/de not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0191655A1 (de) * | 1985-01-15 | 1986-08-20 | Commissariat A L'energie Atomique | Verfahren zum Aufspulen eines Behälters |
US5442572A (en) * | 1992-11-23 | 1995-08-15 | Ford Motor Company | Method and system for comparing free-form geometries using high density point data models |
US5546328A (en) * | 1994-06-02 | 1996-08-13 | Ford Motor Company | Method and system for automated alignment of free-form geometries |
EP0854406A1 (de) * | 1997-01-21 | 1998-07-22 | Ford Global Technologies, Inc. | Verfahren zur Vorhersage des Volumens eines fertigen Verbrennungsraumes ausgehend von einer Rohform eines Zylinderkopfes |
Non-Patent Citations (1)
Title |
---|
LI S X ET AL: "5-AXIS MACHINING OF SCULPTURED SURFACES WITH A FLAT-END CUTTER" COMPUTER AIDED DESIGN,GB,ELSEVIER PUBLISHERS BV., BARKING, Bd. 26, Nr. 3, 1. März 1994 (1994-03-01), Seiten 165-178, XP000453422 ISSN: 0010-4485 * |
Also Published As
Publication number | Publication date |
---|---|
YU55801A (sh) | 2003-07-07 |
WO2001042707A3 (de) | 2001-12-13 |
RS49680B (sr) | 2007-11-15 |
AU2671601A (en) | 2001-06-18 |
EP1194715A2 (de) | 2002-04-10 |
DE19958373A1 (de) | 2001-06-13 |
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