• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Method for measuring and adjusting the wall thickness (W) of a tube (1) produced by a centrifugal casting process during mass production, the wall thickness (W) being measured by a measuring device (3) arranged directly on a centrifugal device (2).
    公开号:AT517249A1
    申请号:T306/2015
    申请日:2015-05-15
    公开日:2016-12-15
    发明作者:
    申请人:Tiroler Rohre GmbH；
    IPC主号:
    专利说明:

    The invention relates to a method having the features of the preamble of claim 1.
    Methods for measuring or devices for measuring wall thicknesses are already known and are shown for example in DE 10 2013 218 045 A1. The radiometric measuring device shown in the prior art can be used inter alia for testing a wall thickness of a pipe. After a casting such as a tube has been removed from the mold of a spinner, its wall thickness is controlled. The wall thickness must reach a setpoint - this is determined by the radiometric instrument. If it turns out that the pipe does not reach the minimum wall thickness, this is considered scrap. In order to prevent too small wall thicknesses, simply more casting material is emptied into the mold of the spinner in order to generally achieve a thicker wall thickness. However, this too thick wall thickness is not always essential and leads to more casting material is needed than is actually necessary. Furthermore, it may be that due to the not directly carried out measurement of the wall thickness after removal of the tube on the spinner whole batches of pipes do not reach the minimum wall thickness and therefore considered as committee.
    The object of the invention is to avoid the disadvantages described above and to provide a comparison with the prior art improved method for measuring and adjusting the wall thickness.
    This is achieved in the method according to the invention by the features of the characterizing part of the main claim. Due to the fact that the wall thickness is measured by a measuring device arranged directly on a centrifugal device, its wall thickness is controlled directly during the removal of the tube. If this does not reach the nominal value of the wall thickness, then the process parameters for the production of the next pipe are changed. After changing these parameters, a tube with the correct wall thickness is generated on the basis of the measurements made by the measuring device. If the tube by the centrifugal casting in a dimensionally stable state from one in the
    Sliding direction located mold is pulled and the measurement of the wall thickness by the measuring device takes place at the same time with the removal of the tube from the mold, so valuable production time is saved. The data determined by the measuring device are immediately forwarded to a computer to change the process parameters, which are crucial for the production of another tube.
    If the wall thickness of a pipe is changed by process parameters in the course of the centrifugal casting process, then it is possible to influence the wall thickness of the pipe to be produced during the production of a pipe. If the measured values obtained by the measuring apparatus change these process parameters of the centrifugal casting process, a new pipe can be produced on the basis of the measured values of the pipe preceding production.
    If the process parameters of the centrifugal casting process are changed automatically depending on the measured values measured by the measuring device, valuable production time can be saved. It is not necessary to change the process parameters manually - such as the speed of the spinner, the addition of casting material and the feed rate when changing the position of the spinner in relation to the runner.
    If the measured values determined by the measuring device are stored in a computer, these measured values can still be used after the production of the tube, which is necessary, for example, for quality management and quality assurance. Each tube is documented with its wall thickness - e.g. in the case of warranty claims, these measurements can be used. In addition, these measured values can be used to build up a long-term wealth of experience that can increase the cost-effectiveness of producing the pipes.
    If the measurement of the wall thickness of the tube by the measuring device without contact by a radiometric measuring method - preferably by
    Gamma radiation takes place - so the measurement takes place quickly and wear-free on the tubes. A mechanical measuring system may also be damaged or impaired by the heat still emanating from the tube after the casting process.
    In this connection, it should be mentioned that at least the following process parameters are influenced by the measurement of the measuring device during the centrifugal casting process: rotational speed of the centrifugal device and / or filling quantity of the casting material, preferably cast iron, into the centrifugal device and / or advancement of the centrifugal device relative to one along one in the Centrifugal device arranged runner. These three process parameters are the most important process parameters in addition to the temperature and viscosity of the casting material, the angle relative to the horizontal axis in which the spinner / mold rotates. By changing at least these process parameters, the wall thickness of the tube is changed.
    It has proven to be particularly advantageous if the method comprises the following method steps: Centrifugal casting of a pipe, in particular cast iron pipe. Activation of the measuring device arranged directly on the centrifugal device for obtaining measured values with regard to the wall thickness of the tube, removal of the dimensionally stable tube from the centrifugal device, measurement of the wall thickness during removal of the dimensionally stable tube from the mold and storage of the determined measured values in a computer, Preferably automatic changing of the process parameters of the centrifugal casting process by the determined measured values of the wall thickness from the computer and centrifugal casting of a further tube with the adapted process parameters which result from the preceding measurement of the wall thickness.
    Through the passage of these individual steps, the economic production of a tube with a substantially constant wall thickness over the prior art is simplified.
    Further details and advantages of the present invention will be explained in more detail below with reference to the description of the figures with reference to the exemplary embodiments illustrated in the drawings.
    Show:
    1 front view of a centrifugal device with measuring device,
    FIG. 2 Schematic representation of the centrifugal casting process beginning,
    Fig. 3 Schematic representation of centrifugal casting process end,
    Fig. 4 Schematic diagram removal tube with simultaneous measurement and
    Fig. 5 process flow diagram Method for measuring and adjusting the wall thickness.
    FIG. 1 shows a spinning device 2 with a mold 6 located therein, which contains a tube 1. On the side at which the tube 1 is removed from the mold 6, there is the measuring device 3. The measuring device 3 consists essentially of a radiator 13 and a detector 14. The rays indicated by the radiator 13 are received by the detector 14 and on the computer 4 passed. The detector 14 detects the attenuated beam and in the computer from the measured value MW is determined. The extent of the attenuation in detecting the measured value MW then gives information on the wall thickness W of the tube 1 produced as the only variable in the penetration of the beams. The stronger the wall thickness W of the produced tube 1, the higher the attenuation of the gamma ray in the radiometric determination of the measured value MW. Flierzu is also a pull-out device 7 is provided, which after solidification of the casting material 15 (not visible in Figure 1) of the tube I, the tube 1 from the mold. 6 draws.
    FIG. 2 schematically shows the spinning process of a pipe 1. The pipe outer contour is predetermined by a metallic mold - the mold 6.
    The mold 6 is located in a longitudinally movable spinner 2. The mold 6 rests at several points on rollers 9 and is thus held in position. In the cooling region 10, a cooling medium - for example water - from the outside for cooling the mold 6. Driven by an electric motor rotates the mold 6 about its longitudinal axis L. In the socket-side widening of the pipe to be produced 1 is one of the sleeve inner shape of the tube corresponding core 11 inserted into the mold 6. This core 11 is made of sand and a binder. This core II simultaneously closes off the mold 6. The thus equipped centrifugal device 2 is inclined to the sleeve side of the tube 1 and arranged longitudinally movable on the ramp 12. At the upper end of the machine housing 8, the trough 5 is arranged, which projects into the interior of the mold 6. The longitudinally movable along the longitudinal axis L slingshot device 2 can be moved relative to the runner 5. By a controlled uniform rate of the casting material 15 is achieved that during the casting process, a constant amount of casting material 15 flows through the trough 5 in the mold 6. The runner 5 protrudes at the start of casting almost to the socket end of the tube 1 in the mold 6 into it. Even before the inflow of the casting material 15, the mold 6 is set in rotation. The casting material 15 flowing out at the tip of the casting trough 5 is grasped by the rotating mold 6, first fills the space between the core 11 and the mold 6 and subsequently forms the tubular shaft through the feed v along the ramp 12 of the centrifugal apparatus 2 during the longitudinal process Centrifugal force off. The casting material 15 forms by the superposition of the rotational movement of the mold 6 and the feed v of the spinner 2 along the ramp 12 spirally against the inner wall of the mold 6 and runs in the liquid state to a homogeneous tube 1. A thicker or thinner wall thickness W. results from the change in the amount of casting material 12 for the casting process, the speed d of the mold 6 and the feed v of the spinner 2 along the ramp 12. The speed d of the mold 6 is selected, for example, that a
    Centrifugal force of 15 to 30 G on the liquid casting material 15 acts. In this case, the casting material 15 is compressed and any oxidation products that form during the casting process or entrained slag is displaced inwardly to the tube inside the tube 1. There they are easy to remove when the tube 1 has left the spinner 2. By cooling and by the volume reduction occurring of the casting material 15 after curing, the tube 1 detached from the wall of the mold 6 and can be pulled out in the direction of the sleeve side of the tube 1 from the mold 6. This method allows extremely short cycle times, because the solidified tube 1 can be pulled from the mold 6 within a few seconds - immediately after the next tube 1 can be poured after a new core 11 has been used. On the spinner 2 or the machine in the housing 8, the measuring device 3 is fixed, which makes no measurements during the spin method. Only when removing the tube 1 from the mold 6, a measurement is performed.
    3 shows the finished hurled tube 1 in the mold 6. By the cooling area 10, the curing of the casting material 1 and the cooling of the tube 1 is accelerated. Only when the tube 1 is dimensionally stable by the casting material 15 hardens, the speed d of the mold 6 is reduced. The casting trough 5 has arrived almost at the end of the tubular shaft of the tube 1. The mold 6 has been filled with casting material 15 up to its highest point.
    Figure 4 shows the removal of the tube 1 from the socket-side opening of the mold 6. Previously, the core 11 was removed from the sleeve of the tube 1. During the linear removal of the tube 1 from the mold 6 by the extraction device 7, the tube 1 can be easily rotated, for example by the spinner 2, to generate a kind of spiral measurement by the measuring device 3. The emitter 13 emits the radiometric rays which are received by the detector 14. The computer 4 controls and regulates the measuring process and processes the determined measured values MW of the wall thickness W. From these measured values MW, possibly new process parameters VP are calculated, which influence the wall thickness W during centrifugal casting of the next tube 1. If the measurement result of the measured values MW corresponds to the desired value, the process parameters VP can be maintained and the next tube 1 is produced directly. The measuring device 3 is attached to the outer region of the machine housing 8. The radiometric measurement is preferably carried out by the spinner 2. Since the attenuation of the measuring beam always remains the same when the machine housing 8, the cooling area 10 and the mold 6 penetrate, this can be stored as a fixed value in the computer 4. Only the possibly fluctuating wall thickness of the tube 1 is to be regarded as a variable measured value MW. This can be determined when the radiator 13 and the detector 14 are located directly on the circumference of the machine housing 8 and do not protrude beyond this or the mold 6. An indirect measurement through the individual components of the spinner 2 together with the mold 6 can thus also take place.
    FIG. 5 shows a process flow diagram. Start is the spin process 100. In this a pipe 1 due to the process parameters (speed d, Einfüllmenge em, feed v, ...) a pipe 1 with a wall thickness W is generated. The next step is the cooling process 105. During this, the tube 1 cools and can subsequently be removed from the mold 6. This is followed by the removal process 110 with the simultaneous determination 115 of the measured values MW. If the measured value MW is detected and corresponds to the nominal dimension of the wall thickness W, then the next spin process 100 can be initiated directly. If the measured value MW does not correspond to the required wall thickness W, then the method parameters VP are calculated in the calculation step 120. In adaptation step 125, the process parameters VP, e.g. adapted to the spinner 2 and the inlet for the casting material 15 and only after the next spin process 100 started. Through these processes, the production of a tube 1 with a constant wall thickness W in series production takes place.
    LIST OF REFERENCES: 1 tube 2 spin device 3 measuring device 4 computer 5 runner 6 mold 7 extension device 8 machine housing 9 rollers 10 cooling zone 11 core 12 ramp 13 spotlight 14 detector 15 cast material 100 spin process 105 cooling process 110 removal process 115 measurement 120 calculation step VP 125 adaptation step VP W wall thickness L longitudinal axis (Pipe) MW measured value VP process parameters d speed em fill quantity v feed
    Innsbruck, on May 12, 2015
    权利要求:
    Claims (12)
    [1]
    raiemansprucne
    1. A method for measuring and adjusting the wall thickness (W) of a tube produced by a centrifugal casting process (1) during a series production, characterized in that the wall thickness (W) by a directly on a spinner (2) arranged measuring device (3) is measured ,
    [2]
    2. The method according to claim 1, characterized in that the tube (1) by the centrifugal casting in a dimensionally stable state from the spinner (2) is pulled and the measurement of the wall thickness (W) by the measuring device (3) at the same time with the removal of Tube (1) from the spinner (2).
    [3]
    3. The method according to claim 2, characterized in that the tube (1) rotates during removal from the spinner (2) and during the measurement by the measuring device (3) about its longitudinal axis (L).
    [4]
    4. The method according to any one of claims 1 to 3, characterized in that the wall thickness (W) of a tube (1) in the course of the centrifugal casting process by process parameters (VP) is changed. *
    [5]
    5. The method according to claim 4, characterized in that the process parameters (VP) of the centrifugal casting process are varied as a function of the measured values (MW) measured by the measuring device (3).
    [6]
    6. The method according to claim 5, characterized in that the change of the process parameters (VP) depending on the measured values measured (MW) takes place automatically, which is intervened in case of need manually in the process of changing the process parameters (VP).
    [7]
    7. The method according to any one of claims 1 to 6, characterized in that the by the measuring device (1) determined measured values (MW) are stored in a computer (4).
    [8]
    8. The method according to any one of claims 1 to7, characterized in that the measurement of the wall thickness (W) of the tube (1) by the measuring device (3) takes place without contact.
    [9]
    9. The method according to claim 8, characterized in that the measurement of the wall thickness (W) by a radiometric measuring method - preferably by gamma radiation - takes place.
    [10]
    10. The method according to any one of claims 1 to 9, characterized in that the measuring device (3) comprises a radiator (13) and a detector (14), wherein the detector (14) receives the radiation emitted by the radiator (13).
    [11]
    11. The method according to any one of claims 1 to 10, characterized in that are influenced by the measurement of the measuring device (3) at least the following process parameters (VP) during the centrifugal casting: - speed (d) of the spinner (2) and / or - filling (em) of the casting material (15) - preferably cast iron - in the spinner (2) and / or - feed (v) of the spinner (2) relative to a along the in the spinner (2) arranged runner (5).
    [12]
    12. The method according to any one of claims 1 to 11, characterized in that the method comprises the following steps: - centrifugal casting a pipe (1), in particular cast iron pipe. Activation of the measuring device (3) arranged directly on the centrifugal device (2) to obtain measured values (MW) with respect to the wall thickness (W) of the tube (1), - removal of the dimensionally stable tube (1) from the centrifugal device (2), Measurement of the wall thickness (W) during removal of the dimensionally stable tube (1) from the spinner (2) and storage of the determined measured values (MW) in a computer (4), - automatic Ver'errerVeifährerlspäTarfter (VP) of the centrifugal casting process by the measured values (MW) the wall thickness (W) from the computer (4) and - centrifugal casting of another tube (1) with the adjusted process parameters (VP) which result from the previous measurement of the wall thickness (W). Innsbruck, on May 12, 2015
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    DE3037400C2|1988-10-27|
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    DE714295C|1941-11-26|Process and device for the production of socket pipes from hydraulically setting compounds by centrifugation
    DE628185C|1936-03-31|Device for producing cylindrical hollow bodies, such as sleeves or flanged high-pressure pipes, from asbestos cement or similar building materials
    AT146148B|1936-06-10|Method and device for pressing out metal, in particular lead or lead alloys, in the form of pipes, cable sheaths and the like. Like. Hollow cross-sections and rods od. Like. Solid cross-sections.
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    DE623612C|
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    DE531037C|1931-08-07|Centrifugal method and device for lining the inner wall of pipes, drums or the like with a protective cover
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    DE755761C|1953-01-19|Device for pressing out metal, e.g. B. in the form of pipes, cable sheaths or rods
    DE684046C|1939-11-21|Method and device for the production of molded bodies, in particular pipes, under the action of pressure from compositions that set and harden with a liquid
    DE2819347A1|1979-11-08|Automatic lathe with vibration free bar feed - uses small metal balls packed around bar-stock by hydraulic piston to eliminate unbalance
    同族专利:
    公开号 | 公开日
    EP3093613A1|2016-11-16|
    SI3093613T1|2019-09-30|
    AT517249B1|2017-12-15|
    TR201911197T4|2019-08-21|
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE2840819A1|1978-09-20|1980-04-03|Philips Patentverwaltung|METHOD FOR DETERMINING THE INTERNAL DIMENSIONS OF LONG-EXTENDED HOLLOW BODIES, IN PARTICULAR TUBES|
    DE3327267C2|1983-07-28|1987-07-09|Fuji Electric Co., Ltd., Kawasaki, Kanagawa, Jp|
    JP3866101B2|2001-12-28|2007-01-10|株式会社リコー|Endless belt molding inspection method, endless belt molding manufacturing method, and endless belt molding inspection device|
    JP2004012366A|2002-06-10|2004-01-15|Nippon Chutetsukan Kk|Pipe thickness measuring device and pipe thickness measuring method|
    US8600702B2|2008-12-30|2013-12-03|United States Pipe And Foundry Company, Llc|Non-destructive thickness measurement systems and methods|
    CN102059257B|2010-11-04|2012-10-03|天津市核人仪器设备有限公司|Device for online measuring wall thickness of hot-rolled metal pipe by using gamma rays|
    JP6071756B2|2013-05-29|2017-02-01|株式会社クボタ|Thickness measurement method|
    DE102013218045B4|2013-09-10|2016-06-30|Berthold Technologies Gmbh & Co. Kg|Radiometric measuring device and radiometric measuring system|CN109946046B|2017-12-21|2022-01-07|宁波舜宇车载光学技术有限公司|Eccentricity testing device and method|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA306/2015A|AT517249B1|2015-05-15|2015-05-15|Method for measuring and adjusting the wall thickness of a pipe|ATA306/2015A| AT517249B1|2015-05-15|2015-05-15|Method for measuring and adjusting the wall thickness of a pipe|
    TR2019/11197T| TR201911197T4|2015-05-15|2016-03-29|Method for measuring and adapting the wall thickness of a pipe.|
    EP16162630.4A| EP3093613B1|2015-05-15|2016-03-29|Method for measuring and matching the thickness of a tube|
    SI201630338T| SI3093613T1|2015-05-15|2016-03-29|Method for measuring and matching the thickness of a tube|
    ES16162630T| ES2742174T3|2015-05-15|2016-03-29|Method for measuring and adapting the wall thickness of a tube|
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